Liquid crystal display device

Technical Field

The invention relates to a multi-gap structure of the liquid crystal display device.

Background Art

In the liquid crystal display device, for example, is set in the R (red), (green) G, B (blue) respectively to the corresponding pixel, but in the liquid crystal layer uniform with the thickness of the liquid crystal display device of the structure, the wavelength dependency of the liquid crystal layer will cause hysteresis in the black display is produced under wild angle the coloring of the strabismus (for example, blue black). In order to reduce this coloring, will be according to the R, G, B pixel setting the gray scale-luminance characteristic (the gamma curve), but this will exist when viewed in the front black brightness changes, the problem of reduced contrast. Therefore, as a reduction of such coloring and to maintain the way of contrast, according to the R, G, the thickness of the liquid crystal layer pixel B change to compensate for the lag of the wavelength dependency of the multi-gap structure (for example, referring to Patent literature 1).

However, in the liquid crystal display device, as shown in Figure 16, a drain electrode of the transistor (and electrically connected to the pixel electrode to ground) and the scanning signal line by the parasitic capacitance between the drain electrode of the transistor Cgd and (and with it the pixel electrode is electrically connected with) the source electrode of the transistor (and the electric connection of the data signal line) of the parasitic capacitance between Csd, known these parasitic capacitance will result in the phenomenon: the transistor is turned off (the scanning signal non-activated) at the time, of the pixel (pixel electrode) can be reduced. The lowering amount of the potential (absolute value) (ΔQ) known as the feed-through voltage, is arranged to supply the electric potential of the signal of the pixel when S, the effective potential to the pixels S-ΔQ (the following, the common electrode potential Vcom as a reference of the effective potential of the referred to as the absolute value of the effective voltage). Furthermore, is supplied to the scan signal line electric potential of the scanning signal for the activation of the VH, non-activated electric potential is VL, Clc liquid crystal capacitance is, maintain Ccs (auxiliary) capacitance is, the feed-through voltage is ΔQ =Cgd× (VH-VL)/(Ccs+Csd+Cgd +Clc).

Therefore, as shown in Figure 21, when in the R pixel X when the continuous display gray level, to the R pixel alternately SHRX supply electric potential of the signal (positive polarity driving) and electric potential of the signal (when the negative polarity drive) SLRX, positive polarity SHRX= set as the electric potential of the signal potential EHRX+ΔQx effective at the time of drive, electric potential of the signal polarity SLRX= ELRX+ΔQx effective potential at the time of drive. Furthermore, when driving the positive polarity of the effective potential EHRX and a negative polarity at the time of drive of the intermediate value of the effective potential ELRX = (EHRX+ELRX)/ 2 = {(SLRX+SHRX)/ 2}-ΔQx=Vcom (the electric potential of the common electrode), thereby the signal potential SHRX and electric potential of the signal an intermediate value SLRX SMRX=(SHRX+SLRX)/ 2=Vcom +ΔQx.

Furthermore, as shown in Figure 21, when the continuous display gray scale pixel G X when in, the pixel G SHGX alternately supply electric potential of the signal (positive polarity driving) and electric potential of the signal (when the negative polarity drive) SLGX, positive polarity SHGX= set as the electric potential of the signal potential EHGX+ΔQx effective at the time of drive, electric potential of the signal polarity SLGX= ELGX+ΔQx effective potential at the time of drive. Furthermore, when driving the positive polarity of the effective potential EHGX and a negative polarity at the time of drive of the intermediate value of the effective potential ELGX = (EHGX+ELGX)/ 2 = {(SLGX+SHGX)/ 2}-ΔQx=Vcom (the electric potential of the common electrode), thereby the signal potential SHGX and electric potential of the signal an intermediate value SLGX SMGX=(SHGX+SLGX)/ 2=Vcom +ΔQx.

Furthermore, as shown in Figure 21, when the continuous display gray scale pixel B X when in, the pixel B SHBX alternately supply electric potential of the signal (positive polarity driving) and electric potential of the signal (when the negative polarity drive) SLBX, positive polarity SHBX= set as the electric potential of the signal potential EHBX+ΔQx effective at the time of drive, electric potential of the signal polarity SLBX= ELBX+ΔQx effective potential at the time of drive. Furthermore, when driving the positive polarity of the effective potential EHBX and a negative polarity at the time of drive of the intermediate value of the effective potential ELBX = (EHBX+ELBX)/ 2 = {(SLBX+SHBX)/ 2}-ΔQx=Vcom (the electric potential of the common electrode), thereby the signal potential SHBX and electric potential of the signal an intermediate value SLBX SMBX=(SHBX+SLBX)/ 2=Vcom +ΔQx.

In this way, the R pixel, pixel G, respectively B pixel in X the same gray scale is displayed, the electric potential of the signal supplied to the pixel R the intermediate value SMRX, supply G the middle of the electric potential of the signal of the pixel value of pixel B SMGX and supply the electric potential of the signal value in the middle of the unified SMBX.

Literature of the prior art

Patent literature

Patent literature 1: Japanese public Patent Bulletin " opens especially 2007-233336 of (13 September 2007 discloses) the"

Content of the invention

Problem to be solved by the invention

The inventor of this application found that, in the above-mentioned multi-gap structure in the liquid crystal display device, when the and Figure 21 the same setting supply R pixel, pixel G, the electric potential of the signal pixel B (SHRX, SLRX, SHGX, SLGX, SHBX, SLBX) time, occur defects such as ghost of the pixel.

The purpose of this invention lies in the multi-gap structure and the display quality of the liquid crystal display device.

The programme applied to the solution of the problem

This invention relates to a liquid crystal display device is characterized in that, with a plurality of scanning signal lines, a plurality of data signal line, section 1 pixel, resolution 2 pixel section and 3 pixel, the second 1 pixel comprises a section 1 the liquid crystal layer, said section 2 than the pixel includes a section 1 the liquid crystal layer is thin section 2 the liquid crystal layer, the section 3 than the pixels includes 2 the liquid crystal layer is thin section 3 the liquid crystal layer, in 1 scanning signal line from the selection state is changed to the non-selected state, to reduce the electric potential of the scanning signal lines, when in paragraph 1 pixel-section 3 with the specified pixel respectively during the continuous display of the same gray scale, the section 1 pixel alternately supply section 1 and the electric potential of the positive signal 1 negative polarity signal electric potential, to section 2 pixel alternately supply section 2 and the electric potential of the positive signal 2 negative polarity signal electric potential, to section 3 pixel alternately supply section 3 and the electric potential of the positive signal 3 negative polarity potential, the above-mentioned paragraph 1 and the electric potential of the positive signal 1 of the potential of the negative signal (amplitude center) the intermediate section 1 is set to be less than the middle value of the above-mentioned paragraph 2 the electric potential of the positive signal and 2 negative polarity electric potential of the signal (amplitude center) of the intermediate section 2 is high in the middle, the section 2 is set to be less than the middle value of the above-mentioned paragraph 3 and the electric potential of the positive signal 3 negative polarity electric potential of the signal (amplitude center) of the intermediate section 3 intermediate value is high.

In section 1 the thickness of the liquid crystal layer> section 2 the thickness of the liquid crystal layer> section 3 the thickness of the liquid crystal layer of the multi-gap structure in the liquid crystal display device, section 3 pixel of the liquid crystal capacitance> section 2 pixel of the liquid crystal capacitance> section 1 pixel of the liquid crystal capacitor, thus in subsection 1 pixel-section 3 pixel in the display the same gray scale, a section 1 of the feed-through voltage pixel> section 2 pixel in the feed-through voltage> section 3 of the feed-through voltage of the pixel. Therefore, as described above, if the section 1 intermediate value> section 2 intermediate value> section 3 intermediate value, between pixels can be compensated on the feed-through voltage is different, the ghost of the pixel can be improved and the like.

The effect of this invention

According to the present invention, can be easily compensated multi-gap structure of the pixel in the liquid crystal display device different from the feed-through voltage, the ghost of the pixel can be improved and the like.

Description of drawings

Figure 1 shows the liquid crystal display device in the electric potential of the signal supposes the common practice (1023 gray scale = white gray level display) of the schematic diagram.

Figure 2 is the liquid crystal display device shown in the block diagram.

Figure 3 shows the liquid crystal display device of the cross section of the liquid crystal panel (multi-gap structure) a cross-sectional view.

Figure 4 shows the liquid crystal display device in the electric potential of the signal supposes the common practice (512 gray scale level display) of the schematic diagram.

Figure 5 shows the liquid crystal display device of in supposes the common practice the electric potential of the signal (0 gray scale level display = [...]) of the schematic diagram.

Figure 6 shows the liquid crystal display device of the median electric potential of the signal of the gray-level dependent (one example) of the schematic diagram.

Figure 7 shows the liquid crystal display device in the other of the electric potential of the signal supposes the common practice (1023 gray scale = white gray level display) of the schematic diagram.

Figure 8 shows the liquid crystal display device of the display control circuit keeping the content of the LUT table.

Figure 9 shows the source driver of the liquid crystal display device is a schematic diagram (a part of).

Figure 10 shows the DAC circuit of the liquid crystal display device of the input-output table.

Figure 11 shows the source driver of the liquid crystal display device and the other forming a schematic diagram (a part of).

Figure 12 shows the source driver of the liquid crystal display device of the input-output table.

Figure 13 shows the TV is a block diagram of the receiver.

Figure 14 shows the liquid crystal display device of the median electric potential of the signal of the gray-level dependent (other embodiment) the schematic diagram.

Figure 15 shows the multi-gap structure in the liquid crystal display device of the R, G, B value series electric potential of the signal of the pixel defect of the middle of the moment (relative to the potential deviation) of the schematic diagram.

Figure 16 shows a liquid crystal display device of the liquid crystal capacitor, a storage capacitor and circuit diagram of parasitic capacitance.

Figure 17 shows the embodiment of a cross-sectional view of other liquid crystal panel.

Figure 18 shows use chart 17 under the liquid crystal panel supposes the common practice of the electric potential of the signal (when the gray scale display T) of the schematic diagram.

Figure 19 shows the other embodiment of a cross-sectional view of the liquid crystal panel.

Figure 20 shows use chart 19 under the liquid crystal panel supposes the common practice of the electric potential of the signal (when the gray scale display T) of the schematic diagram.

Figure 21 shows the non-multi-gap structure of the R, G, B intermediate electric potential of the signal of the pixel a schematic diagram of the method for setting.

Mode of execution

Graphics 1-20 the following description of the embodiments. Figure 2 is the liquid crystal display device shown in the block diagram. If the as shown, the liquid crystal display device includes: a display section (having negative of the liquid crystal layer of the liquid crystal panel mode VA) 60, display control circuit 70, gate driver 80, source driver 90. In the display part (liquid crystal panel) 60 is provided with a data signal line (15R, 15G, 15B), the scanning signal line 16, the red pixel (following as the R pixel) PR, green pixel (following is pixel G) PR, blue pixel (following is pixel B) PB and holding capacitor wiring (wiring Cs, not shown). Furthermore, data signal line 15R is connected to the R pixel, data signal line 15G is connected to pixel G, data signal line 15B connected to the B pixel.

Display control circuit 70 from the external signal source (for example, tuner) receiving digital video signal Dv, HSY horizontal synchronous signal, a vertical synchronization signal VSY and used for controlling the control signal of the display action Dc. Display control circuit 70 according to the signal (Dv, HSY, VSY, Dc) generating a source start pulse signal SSP, source clock signal SCK, POL source extremely polarity signal, Image data signal DAT (digital signal), the gate start pulse signal GSP, gate clock signal GCK and gate driver output control signal GOE, the source driver 90 output source start pulse signal SSP, source clock signal SCK, and POL source extremely polarity signal of the Image data signal DAT, to the gate driver 80 outputs a gate start pulse signal GSP, gate clock signal GCK and gate driver output control signal GOE.

Furthermore, gate driver 80 according to a gate start pulse signal GSP, gate clock signal GCK and gate driver output control signal GOE driving the scanning signal line 16, source driver 90 according to the source start pulse signal SSP, source clock signal SCK and Image data signal to drive data signal line DAT (15R, 15G, 15B). Specifically, the SSP by source start pulse signal, source clock signal SCK and source extremely polarity signal POL with a predetermined timing corresponding to the Image data signal DAT potential supplying an analog signal of the data signal line (15R, 15G, 15B).

Figure 3 shown Figure 2 of the liquid crystal panel 60 a partial cross section. If the as shown, the liquid crystal panel 60 provided with an active matrix substrate 3, the color filter substrate 30 between the base plate and filled in the liquid crystal layer 40. In the active matrix substrate 3 is formed with a data signal line, the scanning signal line, various insulating film, transistor and keeps the capacitor wiring (these are not shown), the picture element electrode 17R, 17G, 17B, the alignment film covers the pixel electrode 9. Furthermore, at the color filter substrate is formed on the pixel electrode 17R, 17G, 17B corresponding color filter 13R, 13G, 13B, the opposing electrode of the color filter 28, covering the opposing electrode 28 of the alignment film 19. And, a pixel R comprising a pixel electrode PR 17R, the opposing electrode 28 and a liquid crystal layer by them LR, pixel G pixel electrode is configured to include PG 17G, the opposing electrode 28 and a liquid crystal layer by their LG, pixel B pixel electrode is configured to include PB 17B, the opposing electrode 28 and a liquid crystal layer as the pound.

In this, the liquid crystal panel has a liquid crystal layer the thickness of the LR> the thickness of the liquid crystal layer LG> pound of the liquid crystal layer the thickness of the multi-gap structure.

The advantages of multi-gap structure, according to the R, G, B pixel to change the thickness of the liquid crystal layer, thereby substantially compensating lag the wavelength dependent. In other words, the curve VT R of the pixel (effective voltage-transmissivity curve), and VT G B of the pixel of the pixel than VT curve with the deviation of the structure between the (R, G, B pixel of the uniform thickness of the liquid crystal layer) of the liquid crystal display device is small. Generally, in the structure with VA mode in the liquid crystal display device, in the intermediate gray scale display, transmittance is B pixel> G pixel> pixel R, will therefore produce the blue coloring, multi-gap structure, however, can be used to inhibit such coloring, improving the display quality.

In the multi-gap in the liquid crystal display device has the advantage, however, because the thickness of the pixel of the liquid crystal layer R> the thickness of the liquid crystal layer of the pixel G> B the thickness of the liquid crystal layer of the pixel, i.e., picture element of the liquid crystal capacitance (Clc) B> liquid crystal capacitor of the pixel (Clc) G> liquid crystal capacitor of the pixel (Clc) R, the R pixel, pixel G, B pixel is displayed in the case of the same gray scale, a pixel R the feed-through voltage> the feed-through voltage pixel G> B pixel of the feed-through voltage. This is because the feed-through voltage for that ΔQ =Cgd× (VH-VL)/(Ccs+Csd+Cgd +Clc). Therefore, in the R pixel, pixel G, respectively B pixel in X the same gray scale is displayed, as in the past when the R pixel electric potential of the signal supplied to the intermediate value SMRX, supply G the middle of the electric potential of the signal of the pixel value of the pixel B SMGX and supplying an intermediate value of the electric potential of the signal suggested SMBX, as shown in Figure 15 the pixels in the R pixel and B relative potential deviation, such as a ghost of the pixel.

Therefore, in this embodiment, the multi-gap for the liquid crystal display device of the R pixel, pixel G, respectively B pixel in X the same gray scale is displayed, pixel R is set to the electric potential of the signal supplied to the intermediate value SMRX> G pixel electric potential of the signal supplied to the intermediate value SMGX> B pixel electric potential of the signal supplied to the intermediate value SMBX, thereby compensating for the above-mentioned R pixel, pixel G, B pixel in different feed-through voltage.

For example, the highest gray level of the display as the (white gradation level) 1023 grayscale levels, consider the feed-through voltage ΔQR1023 pixel R> ΔQG1023 feed-through voltage of the pixel G> B Δ QB1023 feed-through voltage of the pixel of the situation, as shown in Figure 1 that, of the pixel set, supply electric potential of the positive signal R SHR1023, supply the potential of the negative signal of the pixel R SLR1023, SHR1023 and SLR1023 SMR1023 the middle value, supply G SHG1023 of the pixel electric potential of the positive signal, supply the potential of the negative signal of the pixel G SLG1023, SHG1023 and SLG1023 SMG1023 the middle value, supply B SHB1023 of the pixel electric potential of the positive signal, supply the potential of the negative signal of the pixel B SLB1023 and SHB1023 and SLB1023 SMB1023 the intermediate value (in addition, is provided with the most suitable for an attempt to 1 multi-gap structure as the prerequisite R pixel 1023 gray scale display of the effective potential as EHR1023 and ELR1023, is provided with the most suitable for the above-mentioned multi-gap structure as the prerequisite G pixel 1023 gray scale display of the effective potential as EHG1023 and ELG1023, is provided with the most suitable for the above-mentioned multi-gap structure as the prerequisite B pixel 1023 gray scale display of the effective potential as EHB1023 and ELB1023).

Specifically, the R pixel, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHR1023 = Δ QR1023 EHR1023 + feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLR1023 = Δ QR1023 ELR1023 + feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the intermediate value of the effective potential of negative polarity = (EHR1023 +ELR1023)/ 2, is, the intermediate value of the potential of the negative signal SMR1023 = (SHR1023 +SLR1023)/ 2=Vcom +ΔQR1023. Furthermore, the pixel G, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHG1023 = Δ QG1023 EHG1023 + feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLG1023 = Δ QG1023 ELG1023 + feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the intermediate value of the effective potential of negative polarity = (EHG1023 +ELG1023)/ 2, is, the intermediate value of the potential of the negative signal SMG1023 = (SHG1023 +SLG1023)/ 2=Vcom +ΔQG1023. Furthermore, the pixel B, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHB1023 = Δ QB1023 EHB1023 + feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLB1023 = Δ QB1023 ELB1023 + feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the intermediate value of the effective potential of negative polarity = (EHB1023 +ELB1023)/ 2, is, the intermediate value of the potential of the negative signal SMB1023 = (SHB1023 +SLB1023)/ 2=Vcom +ΔQB1023.

Therefore, as shown in Figure 1,

SMR1023 = Vcom+ΔQR1023> SMG1023

= Vcom+ΔQG1023> SMB1023 = Vcom+ΔQB1023.

Furthermore, one of the display as the intermediate gray level is 512 grayscale levels, consider the feed-through voltage ΔQR512 pixel R> ΔQG512 feed-through voltage of the pixel G> B Δ QB512 feed-through voltage of the pixel of the situation, as shown in Figure 4, of the pixel set, supply the potential of the positive signal R SHR512, supply the potential of the negative signal of the pixel R SLR512, SHR512 and SLR512 SMR512 the middle value, supply G SHG512 of the pixel electric potential of the positive signal, supply the potential of the negative signal of the pixel G SLG512, SHG512 and SLG512 SMG512 the middle value, supply B SHB512 of the pixel electric potential of the positive signal, supply the potential of the negative signal of the pixel B SLB512 and SHB512 and SLB512 SMB512 the intermediate value (in addition, is provided with the most suitable for an attempt to 4 of the multi-gap structure as the prerequisite R pixel 512 gray scale display of the effective potential as EHR512 and ELR512, is provided with the most suitable for the above-mentioned multi-gap structure as the prerequisite G pixel 512 gray scale display of the effective potential as EHG512 and ELG512, is provided with the most suitable for the above-mentioned multi-gap structure as the prerequisite B pixel 512 gray scale display of the effective potential as EHB512 and ELB512).

Specifically, the R pixel, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHR512 = Δ QR512 EHR512 + feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLR512 = Δ QR512 ELR512 + feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the intermediate value of the effective potential of negative polarity = (EHR512 +ELR512)/ 2, is, the intermediate value of the potential of the negative signal SMR512 = (SHR512 +SLR512)/ 2=Vcom +ΔQR512. Furthermore, the pixel G, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHG512 = Δ QG512 EHG512 + feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLG512 = Δ QG512 ELG512 + feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the intermediate value of the effective potential of negative polarity = (EHG512 +ELG512)/ 2, is, the intermediate value of the potential of the negative signal SMG51 = (SHG512 +SLG512)/ 2=Vcom +ΔQG512. Furthermore, the pixel B, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHB512 = Δ QB512 EHB512 + feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLB512 = Δ QB512 ELB512 + feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the intermediate value of the effective potential of negative polarity = (EHB512 +ELB512)/ 2, is, the intermediate value of the potential of the negative signal SMB512 = (SHB512 +SLB512)/ 2=Vcom +ΔQB512.

Therefore, as shown in Figure 4, SMR512 = Vcom+ΔQR512> SMG512 =Vcom +ΔQG512> SMB512 = Vcom+ΔQB512. Furthermore, ΔQR1023 <ΔQR512, subsidence QG1023 <ΔQG512, subsidence QB1023 <ΔQB512 (in other words, and 1023 gray scale display compared with the, 512 gray scale display of the feed-through voltage is larger), this is due to the mode of the liquid crystal layer having negative VA (normally black) in the liquid crystal panel, as the display gray-level drop (applied effective voltage of the liquid crystal layer becomes smaller), the liquid crystal capacitor can wane Clc.

In the display as the low gray scale of ([...]) 0 grayscale levels, consider the feed-through voltage ΔQR0 pixel R> ΔQG0 feed-through voltage of the pixel G> B Δ QB0 feed-through voltage of the pixel of the situation, as shown in Figure 5, , R of the pixel set, supply the potential of the positive signal SHR0, supply the potential of the negative signal of the pixel R SLR0, SHR0 and SLR0 SMR0 the middle value, supply G SHG0 of the pixel electric potential of the positive signal, supply the potential of the negative signal of the pixel G SLG0, SHG0 and SLG0 SMG0 the middle value, to supply the electric potential of the positive signal of the pixel B SHB0, supply the potential of the negative signal of the pixel B SLB0 and SHB0 and SLB0 SMB0 the intermediate value (in addition, is provided with the most suitable for an attempt to 5 multi-gap structure as the prerequisite R pixel 0 gray scale display of the effective potential as EHR0 and ELR0, is provided with the most suitable for the above-mentioned multi-gap structure as the prerequisite G pixel 0 gray scale display of the effective potential as EHG0 and ELG0, is provided with the most suitable for the above-mentioned multi-gap structure as the prerequisite B pixel 0 gray scale display of the effective potential as EHB0 and ELB0).

Specifically, the R pixel, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHR0 = Δ QR0 EHR0 + feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLR0 = Δ QR0 ELR0 + feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the intermediate value of the effective potential of negative polarity = (EHR0 +ELR0)/ 2, is, the intermediate value of the potential of the negative signal SMR0 = (SHR0 +SLR0)/ 2=Vcom +ΔQR0. Furthermore, the pixel G, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHG0 = Δ QG0 EHG0 + feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLG0 = Δ QG0 ELG0 + feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the intermediate value of the effective potential of negative polarity = (EHG0 +ELG0)/ 2, is, the intermediate value of the potential of the negative signal SMG0 = (SHG0 +SLG0)/ 2=Vcom +ΔQG0. Furthermore, the pixel B, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHB0 = Δ QB0 EHB0 + feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLB0 = Δ QB0 ELB0 + feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the intermediate value of the effective potential of negative polarity = (EHB0 +ELB0)/ 2, is, the intermediate value of the potential of the negative signal SMB0 = (SHB0 +SLB0)/ 2=Vcom +ΔQB0.

Therefore, as shown in Figure 5, SMR0=Vcom +ΔQR0> SMG0=Vcom +ΔQG0> SMB0=Vcom +ΔQB0. Furthermore, ΔQR512 <ΔQR0, subsidence QG512 <ΔQG0, subsidence QB512 <ΔQB0, as mentioned above, this is due to the mode of the liquid crystal layer having negative VA (normally black) in the liquid crystal panel, as the display gray-level drop (applied effective voltage of the liquid crystal layer becomes smaller), the liquid crystal capacitance becomes small Clc.

Figure 6 is the display in pixel R 0,512 and 1023 Δ QG0 feed-through voltage of the gray level, the electric potential of the positive signal SHG0, supply the potential of the negative signal of the pixel G SLG0, SHG0 and SLG0 SMG0 the middle value, Δ QG512 feed-through voltage, the electric potential of the positive signal SHG512, supply the potential of the negative signal of the pixel G SLG512, SHG512 and SLG512 SMG512 the middle value, Δ QG1023 feed-through voltage, the electric potential of the positive signal SHG1023, supply the potential of the negative signal of the pixel G SLG1023, SHG1023 and SLG1023 SMG1023 the middle value of the set up routine. As shown in the graph, as the display gray-level rise (applied effective voltage of the liquid crystal layer becomes larger), the feed-through voltage is reduced, in addition, is, the intermediate value of the potential of the negative signal is low. This is due to the mode of the liquid crystal layer having negative VA (normally black) in the liquid crystal panel, as the display gray-level rise (applied effective voltage of the liquid crystal layer becomes larger), the liquid crystal capacitance becomes large Clc.

In Figure 1 in, applied to the R, G, pixel B effective potential of positive polarity (EHR1023, EHG1023, EHB1023) for EHR1023> EHG1023> EHB1023, applied to the R, G, the effective potential B pixel of negative polarity (ELR1023, ELG1023, ELB1023) is also EHB1023> EHG1023> EHR1023. This is because only through the liquid crystal layer is set to compensate for the thickness of the R, G, differences of hysteresis B pixels (the R, G, B pixel corresponding to 3 of the same curve VT) in the actual process is not easy, therefore, by utilizing multi-gap structure, the and R, G, pixel corresponding to B 3, VT (effective voltage-transmissivity) curve almost the same, and as a final adjustment, according to the R, G, gamma curve B pixel (gray scale-luminance characteristics) of the setting (the so-called gamma setting independent RGB).

Originally, independent RGB gamma setting is not necessary, as long as appropriate according to the actual process can be performed. In other words, if only through the liquid crystal layer is set to compensate for the thickness of the R, G, differences of hysteresis B pixels (the R, G, B pixel corresponding to 3 of the same curve VT) of the process is possible (also including the cost), can also be an independent RGB gamma setting is not carried out. In this case, for example, in the display as the [...] 0 grayscale levels, as shown in Figure 7, the effective potential applied to the R (EHR0, ELR0), the effective potential applied to the G (EHG0, ELG0) and the effective potential applied to the B (EHB0, ELB0) is unified.

Fig. 8 shows display control circuit 70 includes the LUT (lookup table) of table supposes the common practice. Display control circuit 70 with the digital video signal and the above-mentioned LUT Dv source extremely polarity signal POL is generated ("H" or "L") and an Image data signal DAT the combination of the (10 bit). The input of the LUT are described below for the digital video signal shown in Dv of the gray level, but can also be the input of the LUT is Dv the digital video signal of digital signal processing of the gradation levels is shown.

For example, according to that of R (red) 0 Dv of gray, "H" is generated and POL= 15 DAT the gray scale of the R the combination of the "L" and said and POL= 0 the gray scale of the R the combination of the DAT. Furthermore, according to that of the (green) G 0 Dv of gray, "H" is generated and POL= 13 DAT G the gray scale of the combination of the "L" and said and POL= 6 the gray scale of the combination of the DAT G. Furthermore, according to that of the (blue) B 0 Dv of gray, "H" is generated and POL= 0 DAT B the gray scale of the combination of the "L" and said and POL= 9 the gray scale of the combination of the DAT B. Furthermore, according to that of R (red) 512 Dv of gray, "H" is generated and POL= 612 the gray scale of the R the combination of the DAT "L" and said and POL= 402 the gray scale of the R the combination of the DAT. Furthermore, according to that of the (green) G 512 Dv of gray, "H" is generated and POL= 512 gray scale of the combination of the DAT G "L" and said and POL= 512 gray scale of the combination of the DAT G. Furthermore, according to that of the (blue) B 512 Dv of gray, "H" is generated and POL= 364 the gray scale of the combination of the DAT B "L" and said and POL= 625 B the gray scale of the combination of the DAT. Furthermore, according to that of R (red) 1023 Dv of gray, "H" is generated and POL= 1023 the gray scale of the R the combination of the DAT "L" and said and POL= 1015 the gray scale of the R the combination of the DAT. Furthermore, according to that of the (green) G 1023 Dv of gray, "H" is generated and POL= 1015 the gray scale of the combination of the DAT G "L" and said and POL= 1016 the gray scale of the combination of the DAT G. Furthermore, according to that of the (blue) B 1023 Dv of gray, "H" is generated and POL= 1012 the gray scale of the combination of the DAT B "L" and said and POL= 1023 B the gray scale of the combination of the DAT.

The source driver 90 with the output in the analog voltage corresponding to gray scale levels, therefore from the above-mentioned LUT after correcting for the gray scale data are transformed into the analog voltage.

For example, when "H" POL=, 15 set the gray scale is inputted to the source driver, the source driver outputs the potential of the positive signal SHR0 simulation (with reference to Figure 5), when the "L" POL=, 0 set of gray is inputted to the source driver, the source driver outputs the potential of the positive signal SHL0 simulation (with reference to Figure 5). Figure 9 shows the source driver 90 construction precedent of a part of the schematic diagram. As shown in Figure 9, the source driver 90 is connected to the data signal is set in line 15R (red signal line) of the DAC100 and DAC101, is connected to the data signal line 15G (green signal line) of the DAC100 and DAC101 and is connected to the data signal line 15B (blue signal line) of the DAC100 and DAC101.

And, are connected to the data signal line 15R of the DAC100 input POL= of R "H" of the DAT, are connected to the data signal line 15R DAC101 of the "L" input POL= DAT of the R, are connected to the data signal line 15G of the DAC100 input POL= G "H" of the DAT, are connected to the data signal line 15G the DAC101 input POL= G "L" of the DAT, are connected to the data signal line 15B of the DAC100 input POL= B "H" of the DAT, are connected to the data signal line 15B the DAC101 input POL= B "L" of the DAT.

Fig. 10 shows fig. 9 the DAC100 and DAC101 (a portion of) the input-output table. As shown in the plan, DAC100 when the input digital Image data signal DAT15 time, the electric potential of the positive signal output simulation SHR0 (with reference to Figure 5), when the input Image data signal DAT612 time, SHR512 output positive polarity electric potential of the signal (with reference to Figure 4), when the input Image data signal DAT1023 time, SHR1023 output positive polarity electric potential of the signal (with reference to Figure 1), when the input Image data signal DAT13 time, SHG0 output positive polarity electric potential of the signal (with reference to Figure 5), when the input Image data signal DAT512 time, SHG512 output positive polarity electric potential of the signal (with reference to Figure 4), when the input Image data signal DAT1015 time, SHG1023 output positive polarity electric potential of the signal (with reference to Figure 1), when the input Image data signal DAT0 time, the electric potential of the positive signal SHB0 output (with reference to Figure 5), when the input Image data signal DAT364 time, SHB512 output positive polarity electric potential of the signal (with reference to Figure 4), when the input Image data signal DAT1012 time, SHB1023 output positive polarity electric potential of the signal (with reference to Figure 1).

On the other hand, DAC101 when the input digital Image data signal DAT0 time, output analog of negative polarity SLR0 electric potential of the signal (with reference to Figure 5), when the input Image data signal DAT402 time, SLR512 electric potential of the signal output of negative polarity (with reference to Figure 4), when the input Image data signal DAT1015 time, SLR1023 electric potential of the signal output of negative polarity (with reference to Figure 1), when the input Image data signal DAT6 time, SLG0 electric potential of the signal output of negative polarity (with reference to Figure 5), when the input Image data signal DAT512 time, SLG512 electric potential of the signal output of negative polarity (with reference to Figure 4), when the input Image data signal DAT1016 time, SLG1023 electric potential of the signal output of negative polarity (with reference to Figure 1), when the input Image data signal DAT9 time, SLB0 electric potential of the signal output of negative polarity (with reference to Figure 5), when the input Image data signal DAT625 time, SLB512 electric potential of the signal output of negative polarity (with reference to Figure 4), when the input Image data signal DAT1023 time, SLB1023 electric potential of the signal output of negative polarity (with reference to Figure 1).

According to the above, for example, in the R pixel continuous 2 frame display white gradation level the (1023 gray scale), as follows. First of all, the display control circuit 70 according to the R (red) 1023 Dv of gray, "H" is generated and POL= 1023 the gray scale of the R the combination of the DAT (with reference to Figure 8), this shows that 1023 the gray scale of the R is input DAT is connected to the data signal line 15R of the DAC100 (with reference to Figure 9), to the data signal line 15R SHR1023 output positive polarity electric potential of the signal (with reference to Figure 1, 10). Furthermore, the display control circuit 70 according to the R (red) 1023 Dv of gray, "L" is generated and POL= 1015 the gray scale of the R the combination of the DAT (with reference to Figure 8), this shows that 1015 the gray scale of the R is input DAT is connected to the data signal line 15R the DAC101 (with reference to Figure 9), to the data signal line 15R SLR1023 electric potential of the signal output of negative polarity (with reference to Figure 1, 10).

Furthermore, in the pixel G continuous 2 frame display white gradation level the (1023 gray scale), as follows. First of all, the display control circuit 70 according to the (green) G 1023 Dv of gray, "H" is generated and POL= 1015 the gray scale of the combination of the DAT G (with reference to Figure 8), this shows that 1015 DAT G of gray scale is input is connected to the data signal line 15G of the DAC100 (with reference to Figure 9), to the data signal line 15G SHG1023 output positive polarity electric potential of the signal (with reference to Figure 1, 10). Furthermore, the display control circuit 70 according to the (green) G 1023 Dv of gray, "L" is generated and POL= 1016 the gray scale of the combination of the DAT G (with reference to Figure 8), the representation 1016 of the gray scale is input DAT G is connected to the data signal line 15G the DAC101 (with reference to Figure 9), to the data signal line 15G SLG1023 electric potential of the signal output of negative polarity (with reference to Figure 1, 10).

Furthermore, in the pixel B continuous 2 frame display white gradation level the (1023 gray scale), as follows. First of all, the display control circuit 70 according to the (blue) B 1023 Dv of gray, "H" is generated and POL= 1012 the gray scale of the combination of the DAT B (with reference to Figure 8), this shows that 1012 of the gray scale is input DAT B is connected to the data signal line 15B of the DAC100 (with reference to Figure 9), to the data signal line 15B SHB1023 output positive polarity electric potential of the signal (with reference to Figure 1, 10). Furthermore, the display control circuit 70 according to the (blue) B 1023 Dv of gray, "L" is generated and POL= 1023 the gray scale of the combination of the DAT B (with reference to Figure 8), this shows that 1023 DAT B of gray scale is input is connected to the data signal line 15B the DAC101 (with reference to Figure 9), to the data signal line 15B SLB1023 electric potential of the signal output of negative polarity (with reference to Figure 1, 10).

In this way, the display control circuit 70 with Figure 8 to LUT shown in gray-level transform, therefore can as shown in Figure 9 is the source driver 90 a of the two DAC (101, 101). The general source driver 9 a of the, therefore, as long as the display control circuit 70 with new in Figure 8 the LUT, is provided with a LUT or if the display control circuit is the content of the LUT is changed to Figure 8 that, is provided with a LUT or if the display control circuit is further adding the calibration LUT (the school use LUT the output of the Figure 8 as), can carry on chart 1, chart 4-7 shown in the multi-gap structure of the feed-through voltage setting the electric potential of the signal.

Furthermore, this embodiment is not limited to as described above with the display control circuit 70 for carrying out gray-scale-level transform. Also it is possible to change the source driver 90 of a DAC. For example, as shown in Figure 11, the source driver 90 of the DAC 6 kind of (the R, G, pixel B the two). In other words, the data signal line 15R is provided with a corresponding DAC10R, 11R, the data signal line 15G is provided with a corresponding DAC12G, 13G, the data signal line 15B is provided with a corresponding DAC14B, 16B.

Display control circuit 70 according to the input digital video signal POL Dv source extremely polarity signal is generated ("H" or "L") and an Image data signal DAT the combination of the (10 bit).

For example, according to that of R (red) 0 Dv of gray, "H" is generated and POL= 0 DAT gray scale of the R the combination of the "L" and said and POL= 0 the gray scale of the R the combination of the DAT. Furthermore, according to that of the (green) G 0 Dv of gray, "H" is generated and POL= 10 DAT G the gray scale of the combination of the "L" and said and POL= 0 the gray scale of the combination of the DAT G. Furthermore, according to that of the (blue) B 0 Dv of gray, "H" is generated and POL= 0 DAT B the gray scale of the combination of the "L" and said and POL= 0 the gray scale of the combination of the DAT B. Furthermore, according to that of R (red) 512 Dv of gray, "H" is generated and POL= 512 gray scale of the R the combination of the DAT "L" and said and POL= 512 gray scale of the R the combination of the DAT. Furthermore, according to that of the (green) G 512 Dv of gray, "H" is generated and POL= 512 gray scale of the combination of the DAT G "L" and said and POL= 512 gray scale of the combination of the DAT G. Furthermore, according to that of the (blue) B 512 Dv of gray, "H" is generated and POL= 512 gray scale of the combination of the DAT B "L" and said and POL= 512 gray scale of the combination of the DAT B. Furthermore, according to that of R (red) 1023 Dv of gray, "H" is generated and POL= 1023 the gray scale of the R the combination of the DAT "L" and said and POL= 1023 the gray scale of the R the combination of the DAT. Furthermore, according to that of the (green) G 1023 Dv of gray, "H" is generated and POL= 1023 DAT G the gray scale of the combination of the "L" and said and POL= 1023 the gray scale of the combination of the DAT G. Furthermore, according to that of the (blue) B 1023 Dv of gray, "H" is generated and POL= 1023 DAT B the gray scale of the combination of the "L" and said and POL= 1023 B the gray scale of the combination of the DAT.

And, are connected to the data signal line 15R DAC10R of "H" input POL= DAT of the R, are connected to the data signal line 15R DAC11R of the "L" input POL= DAT of the R, are connected to the data signal line 15G DAC12G of "H" input POL= G of the DAT, are connected to the data signal line 15G DAC13G of the "L" input POL= G of the DAT, are connected to the data signal line 15B DAC14B of "H" input POL= B of the DAT, are connected to the data signal line 15B DAC16B of the "L" input POL= B of the DAT.

Figure 12 shows Figure 11 the DAC10R, 11R, 12G, 13G, 14B, 16B (a portion of) the input-output table. As shown in Figure 12, DAC10R when the input digital Image data signal DAT0 time, the electric potential of the positive signal output simulation SHR0 (with reference to Figure 5), when the input Image data signal DAT512 time, SHR512 output positive polarity electric potential of the signal (with reference to Figure 4), when the input Image data signal DAT1023 time, SHR1023 output positive polarity electric potential of the signal (with reference to Figure 1). Furthermore, DAC11R when the input digital Image data signal DAT0 time, SLR0 output positive polarity electric potential of the signal (with reference to Figure 5), when the input Image data signal DAT512 time, SLR512 output positive polarity electric potential of the signal (with reference to Figure 4), when the input Image data signal DAT1023 time, SLR1023 output positive polarity electric potential of the signal (with reference to Figure 1).

Furthermore, DAC12G when the input digital Image data signal DAT0 time, SHG0 output positive polarity electric potential of the signal (with reference to Figure 5), when the input Image data signal DAT512 time, SHG512 output positive polarity electric potential of the signal (with reference to Figure 4), when the input Image data signal DAT1023 time, SHG1023 output positive polarity electric potential of the signal (with reference to Figure 1). Furthermore, DAC13G when the input digital Image data signal DAT0 time, SLG0 output positive polarity electric potential of the signal (with reference to Figure 5), when the input Image data signal DAT512 time, SLG512 output positive polarity electric potential of the signal (with reference to Figure 4), when the input Image data signal DAT1023 time, SLG1023 output positive polarity electric potential of the signal (with reference to Figure 1).

Furthermore, DAC14B when the input digital Image data signal DAT0 time, the electric potential of the positive signal SHB0 output (with reference to Figure 5), when the input Image data signal DAT512 time, SHB512 output positive polarity electric potential of the signal (with reference to Figure 4), when the input Image data signal DAT1023 time, SHB1023 output positive polarity electric potential of the signal (with reference to Figure 1). Furthermore, DAC16G when the input digital Image data signal DAT0 time, SLB0 output positive polarity electric potential of the signal (with reference to Figure 5), when the input Image data signal DAT512 time, SLB512 output positive polarity electric potential of the signal (with reference to Figure 4), when the input Image data signal DAT1023 time, SLB1023 output positive polarity electric potential of the signal (with reference to Figure 1).

According to the above, for example, in the R pixel continuous 2 frame display white gradation level the (1023 gray scale), as follows. First of all, the display control circuit 70 according to the R (red) 1023 Dv of gray, "H" is generated and POL= 1023 the gray scale of the R the combination of the DAT, the representations 1023 the gray scale of the R is input DAT is connected to the data signal line 15R DAC10R of (with reference to Figure 11), to the data signal line 15R SHR1023 output positive polarity electric potential of the signal (with reference to Figure 1, 12). Furthermore, the display control circuit 70 according to the R (red) 1023 Dv of gray, "L" is generated and POL= 1023 the gray scale of the R the combination of the DAT (with reference to Figure 8), this shows that 1023 the gray scale of the R is input DAT is connected to the data signal line 15R DAC11R of (with reference to Figure 11), to the data signal line 15R SLR1023 electric potential of the signal output of negative polarity (with reference to Figure 1, 12).

Furthermore, in the pixel G continuous 2 frame display white gradation level the (1023 gray scale), as follows. First of all, the display control circuit 70 according to the (green) G 1023 Dv of gray, "H" is generated and POL= 1023 the gray scale of the combination of the DAT G, the representations 1023 DAT G of gray scale is input is connected to the data signal line 15G DAC12G of (with reference to Figure 11), to the data signal line 15G SHG1023 output positive polarity electric potential of the signal (with reference to Figure 1, 12). Furthermore, the display control circuit 70 according to the (green) G 1023 Dv of gray, "L" is generated and POL= 1023 the gray scale of the combination of the DAT G, the representations 1023 DAT G of gray scale is input is connected to the data signal line 15G DAC13G of (with reference to Figure 11), to the data signal line 15G SLG1023 electric potential of the signal output of negative polarity (with reference to Figure 1, 12).

Furthermore, in the pixel B continuous 2 frame display white gradation level the (1023 gray scale), as follows. First of all, the display control circuit 70 according to the (blue) B 1023 Dv of gray, "H" is generated and POL= 1023 the gray scale of the combination of the DAT B, the representations 1023 DAT B of gray scale is input is connected to the data signal line 15B DAC14B of (with reference to Figure 11), to the data signal line 15B SHB1023 output positive polarity electric potential of the signal (with reference to Figure 1, 12). Furthermore, the display control circuit 70 according to the (blue) B 1023 Dv of gray, "L" is generated and POL= 1023 the gray scale of the combination of the DAT B, the representations 1023 DAT B of gray scale is input is connected to the data signal line 15B DAC16B of (with reference to Figure 11), to the data signal line 15B SLB1023 electric potential of the signal output of negative polarity (with reference to Figure 1, 12).

When the liquid crystal display device 800 is displayed based on the situation of the picture of the television broadcast next, as shown in Figure 13, the liquid crystal display device 800 is connected with a tuner unit 600, the formed by this television receiver 701. The tuner unit 600 from the antenna (not shown) received in the (high frequency signal) received from the signal of the channel to be received, conversion to the intermediate frequency signal, the intermediate frequency signal by the demodulation of the television signal to take out as a composite color video signal Scv. Scv the composite color video signal is input to the liquid crystal display device 800, from the composite color video signal Scv Dv digital video signal is inputted to the display control circuit 70 (with reference to Figure 2).

Furthermore, in fig. 6 the same as that existing in the feed-through voltage of the pixel gray-level dependency of the situation, but does not exist in the feed-through voltage of the gray-level dependence, can be neglected the dependency of the gray scale levels, regardless of the display gray level, is supplied to the R pixel is, the intermediate value of the potential of the negative signal Vcom+ΔQR, pixel G is supplied, to the intermediate value of the potential of the negative signal Vcom+ΔQG, pixel B is supplied, an intermediate value of the potential of the negative signal for SMBX Vcom+ΔQB. Furthermore, ΔQR> ΔQG> ΔQB, the R pixel is supplied, the intermediate value of the potential of the negative signal> G pixel is supplied, the intermediate value of the potential of the negative signal> B pixel is supplied, an intermediate value of the potential of the negative signal.

Figure 14 is the pixels G 0,512 and 1023 gray scale display of the setting example of the electric potential of the signal, with SMG0=SMG512 =SMG1023. In this case, for example, setting SHR0 and SHB0, make SHR0 (0 gray scale display, the supply of the R pixel electric potential of the positive signal)-SHG0=0.199 (V), SHG0-SHB0 (0 gray scale display supply when being B electric potential of the positive signal of the pixel) =0.242 (V). Similarly, setting SHR512 and SHB512, make SHR512 (512 gray scale display, the supply of the R pixel electric potential of the positive signal)-SHG512=0.199 (V), SHG-SHB512 (512 gray scale display supply when being B electric potential of the positive signal of the pixel) =0.242 (V). Similarly, setting SHR1023 and SHB1023, make SHR1023 (1023 gray scale display, the supply of the R pixel electric potential of the positive signal)-SHG1023=0.199 (V), SHG1023-SHB1023 (1023 gray scale display supply when being B electric potential of the positive signal of the pixel) =0.242 (V).

Furthermore, setting SLR0 and SLB0, make SLR0 (0 gray scale display, the supply of the R pixel electric potential of the negative signal)-SLG0=0.199 (V), SLG0-SLB0 (0 gray scale display supply when being B electric potential of the negative signal of the pixel) =0.242 (V). Similarly, setting SLR512 and SLB512, make SLR512 (512 gray scale display, the supply of the R pixel electric potential of the negative signal)-SLG512=0.199 (V), SLGSLB512 (512 gray scale display supply when being B electric potential of the negative signal of the pixel) =0.242 (V). Similarly, setting SLR1023 and SLB1023, make SLR1023 (1023 gray scale display, the supply of the R pixel electric potential of the negative signal)-SLG1023=0.199 (V), SLG1023-SLB1023 (1023 gray scale display supply when being B electric potential of the negative signal of the pixel) =0.242 (V).

And, in this kind of situation, SHR0 and SLR0 the intermediate value SMR0 and SHG0 and SLG0 SMG0 the middle value of the difference is 0.242 (V), SMG0 and SHB0 and SLB0 SMB0 the intermediate value for the difference of 0.199 (V). Furthermore, SHR512 and SLR512 the intermediate value SMR512 and SHG512 and SLG512 SMG512 the middle value of the difference is 0.242 (V), SMG512 and SHB512 and SLB512 SMB512 the intermediate value for the difference of 0.199 (V). Furthermore, SHR1023 and SLR1023 the intermediate value SMR1023 and SHG1023 and SLG1023 SMG1023 the middle value of the difference is 0.242 (V), SMG1023 and SHB1023 and SLB1023 SMB1023 the intermediate value for the difference of 0.199 (V).

Furthermore, in as shown in Figure 14 under the condition set, can also be in the display control circuit 70 to be treated (for example, for carrying out gray-scale-level conversion LUT), source driver can be changed 90 of a DAC, or on the source driver 90 is provided with a voltage correction circuit.

As shown in Figure 3 that, when the thickness of the liquid crystal layer of the pixel G LG than the thickness of the pixel of the liquid crystal layer R LR hours, in G the brightness of the pixel is reduced under the condition of large, as shown in Figure 17, the liquid crystal layer of the R pixel RP LR=G of the thickness of the thickness of the liquid crystal layer pixel GP LG> pixel B the thickness of the BP pound of the liquid crystal layer (the liquid crystal layer of the pixel thin B), when in the R pixel, pixel B G pixel and to continuously display for a predetermined period when the same gray scale, the electric potential of the signal supplied to each pixel of the pixel R is set to supply the positive, negative polarity of the electric potential of the signal supplied to the pixel of intermediate value = G is, the intermediate value of the potential of the negative signal> B pixel is supplied, an intermediate value of the potential of the negative signal.

Specifically, as shown in Figure 18, when the display gray scale level T, consider the R pixel ΔQRT=G feed-through voltage of the pixel of the feed-through voltage ΔQGT> ΔQBT pixel B of the feed-through voltage, set, supply of the pixel electric potential of the positive signal R SHRT, supply R SLRT of the pixel electric potential of the negative signal, and the intermediate value SLRT SHRT SMRT, supply G SHGT of the pixel electric potential of the positive signal, supply G SLGT of the pixel electric potential of the negative signal, and the intermediate value SLGT SHGT SMGT, supply B SHBT of the pixel electric potential of the positive signal, supply B SLBT of the pixel electric potential of the negative signal, and the intermediate value SLBT SHBT SMBT.

In other words, the R pixel, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHRT= ΔQRT EHRT+ feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLRT= ΔQRT ELRT+ feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the effective potential of negative polarity intermediate value = (EHRT+ELRT)/ 2, is, the intermediate value of the potential of the negative signal SMRT=(SHRT+SLRT)/ 2=Vcom +ΔQRT. Furthermore, the pixel G, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHGT= ΔQGT EHGT+ feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLGT= ΔQGT ELGT+ feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the effective potential of negative polarity intermediate value = (EHGT+ELGT)/ 2, is, the intermediate value of the potential of the negative signal SMGT= (SHGT+SLGT)/ 2=Vcom +ΔQGT. Furthermore, the pixel B, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHBT= ΔQBT EHBT+ feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLBT= ΔQBT ELBT+ feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the effective potential of negative polarity intermediate value = (EHBT+ELBT)/ 2, is, the intermediate value of the potential of the negative signal SMBT=(SHBT+SLBT)/ 2=Vcom +ΔQBT. Therefore, as shown in Figure 18, with SMRT=Vcom+ΔQRT=SMGT = Vcom+ΔQGT> SMBT=Vcom+ΔQBT.

In this embodiment, the color of pixel is not limited to R, G, the B 3 types. Also can be R, G, B, Y (yellow) of the 4 types.

In this case, the wavelength of the R> Y wavelength> wavelength G> B wavelength, therefore such as the thickness of the pixel of the liquid crystal layer R> the thickness of the Y pixel of the liquid crystal layer> the thickness of the liquid crystal layer of the pixel G> B the thickness of the liquid crystal layer of the pixel, when the pixel R, Y pixel, pixel G, B pixel in pixel and C to continuously display for a predetermined period when the same gray scale, setting the electric potential of the signal supplied to each pixel, so that the supply of the R picture element, the intermediate value of the potential of the negative signal> supply Y pixel is, the intermediate value of the potential of the negative signal> G pixel is supplied, the intermediate value of the potential of the negative signal> B pixel is supplied, an intermediate value of the potential of the negative signal.

Furthermore, as shown in Figure 19, the R pixel RP is the thickness of the liquid crystal layer of the liquid crystal layer pixel LR=Y YP LY=G of the thickness of the thickness of the liquid crystal layer pixel GP LG> B the thickness of the liquid crystal layer pixel BP pound of, when the pixel R, Y pixel, pixel B G pixel and to continuously display for a predetermined period when the same gray scale, also possible to set the electric potential of the signal supplied to each pixel, so that the supply of the R picture element, the intermediate value of the potential of the negative signal supply = Y pixel of the positive, negative polarity of the electric potential of the signal supplied to the pixel of intermediate value = G is, the intermediate value of the potential of the negative signal> B pixel is supplied, an intermediate value of the potential of the negative signal.

Specifically, as shown in Figure 20, when the display gray scale level T, consider the R pixel ΔQRT=Y feed-through voltage of the pixel of the feed-through voltage of the feed-through voltage ΔQGT pixel ΔQYT=G> ΔQBT pixel B of the feed-through voltage, set, supply of the pixel electric potential of the positive signal R SHRT, supply R SLRT of the pixel electric potential of the negative signal, and the intermediate value SLRT SHRT SMRT, supply G SHGT of the pixel electric potential of the positive signal, supply Y pixels SLYT electric potential of the signal of negative polarity, and the intermediate value SLYT SHYT SMYT, supply G SLGT of the pixel electric potential of the negative signal, and the intermediate value SLGT SHGT SMGT, supply B SHBT of the pixel electric potential of the positive signal, supply B SLBT of the pixel electric potential of the negative signal, and the intermediate value SLBT SHBT SMBT.

In other words, the R pixel, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHRT= ΔQRT EHRT+ feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLRT= ΔQRT ELRT+ feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the effective potential of negative polarity intermediate value = (EHRT+ELRT)/ 2, is, the intermediate value of the potential of the negative signal SMRT=(SHRT+SLRT)/ 2=Vcom +ΔQRT. Furthermore, the Y pixel, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHYT= ΔQYT EHYT+ feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLYT= ΔQYT ELYT+ feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the effective potential of negative polarity intermediate value = (EHYT+ELYT)/ 2, is, the intermediate value of the potential of the negative signal SMYT= (SHYT+SLYT)/ 2=Vcom +ΔQYT. Furthermore, the pixel G, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHGT= ΔQGT EHGT+ feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLGT= ΔQGT ELGT+ feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the effective potential of negative polarity intermediate value = (EHGT+ELGT)/ 2, is, the intermediate value of the potential of the negative signal SMGT=(SHGT+SLGT)/ 2=Vcom +ΔQGT. Furthermore, the pixel B, is arranged with a positive polarity electric potential of the signal potential effectively positive polarity SHBT= ΔQBT EHBT+ feed-through voltage, effectively negative polarity electric potential of the signal potential of the negative polarity SLBT= ΔQBT ELBT+ feed-through voltage, the opposing electrode (common electrode) potential Vcom= is, the effective potential of negative polarity intermediate value = (EHBT+ELBT)/ 2, is, the intermediate value of the potential of the negative signal SMBT=(SHBT+SLBT)/ 2=Vcom +ΔQBT. Therefore, as shown in Figure 20, with SMRT=Vcom+ΔQRT=SMYT=Vcom+ΔQYT = SMGT=Vcom+ΔQGT> SMBT=Vcom+ΔQBT.

Furthermore, also can be R, G, B, Y (yellow), of (cyan) C 5 types. In the is provided with a R, G, B, Y, of C 5 under the condition of types of picture element, the wavelength of the R> Y wavelength> wavelength G> wavelength C> B wavelength, therefore, such as the thickness of the pixel of the liquid crystal layer R> the thickness of the Y pixel of the liquid crystal layer> the thickness of the liquid crystal layer of the pixel G> the thickness of the liquid crystal layer of the pixel C> B the thickness of the liquid crystal layer of the pixel, when the pixel R, Y pixel, pixel G, B pixel in pixel and C to continuously display for a predetermined period when the same gray scale, setting the electric potential of the signal supplied to each pixel, so that the supply of the R picture element, the intermediate value of the potential of the negative signal> supply Y pixel is, the intermediate value of the potential of the negative signal> G pixel is supplied, the intermediate value of the potential of the negative signal> C pixel is supplied, the intermediate value of the potential of the negative signal> B pixel is supplied, an intermediate value of the potential of the negative signal.

Furthermore, the above-mentioned on the scanning signal line from the selection state is changed to a non-selected state at the time of reducing the electric potential of the scanning signal lines (scanning signal is "High (high)" activation) of the liquid crystal display device, but it could also be from the selected in the scanning signal line state is changed to a non-selected state at the time of a rise of the potential of the scanning signal lines (scanning signal is "Low (low)" activation) of the liquid crystal display device. However, in this kind of liquid crystal display device, the transistor is turned off (scanning signal is non-activation) time, pixel (pixel electrode) in a rise of the potential (the voltage overshoot is generated), the section 1 the thickness of the liquid crystal layer of the pixel> section 2 the thickness of the liquid crystal layer of the pixel> section 3 the thickness of the liquid crystal layer of the pixel, setting the electric potential of the signal supplied to each pixel, so that when in paragraph 1 pixel-section 3 to the pixel in the continuous display for a predetermined period when the same gray scale, the supply section 1 is of the pixel, the intermediate value of the potential of the negative signal <supply section 2 is supplied by the pixels, the intermediate value of the potential of the negative signal <supply section 3 is of the pixel, to an intermediate value of the potential of the negative signal.

Described in the above-mentioned description is the input source of the Image data signal of the driver is set as 10 bits of data, can also be, of course, other bits is set.

This invention relates to a liquid crystal display device is characterized in that, with a plurality of scanning signal lines, a plurality of data signal line, section 1 pixel, resolution 2 pixel section and 3 pixel, the second 1 pixel comprises a section 1 the liquid crystal layer, said section 2 pixel comprises a section 1 of the liquid crystal layer the thickness of the article 2 a liquid crystal layer, the section 3 comprises a ratio of the pixel 2 of the liquid crystal layer of small thickness of the section 3 the liquid crystal layer, in 1 scanning signal line from the selection state is changed to the non-selected state, to reduce the electric potential of the scanning signal lines, when in paragraph 1 pixel-section 3 with the specified pixel respectively during the continuous display of the same gray scale, the section 1 pixel alternately supply section 1 and the electric potential of the positive signal 1 negative polarity signal electric potential, to section 2 pixel alternately supply section 2 and the electric potential of the positive signal 2 negative polarity signal electric potential, to section 3 pixel alternately supply section 3 and the electric potential of the positive signal 3 negative polarity potential, the above-mentioned paragraph 1 and the electric potential of the positive signal 1 of the potential of the negative signal (amplitude center) the intermediate section 1 is set to the middle value of the above-mentioned paragraph 2 the electric potential of the positive signal and 2 negative polarity electric potential of the signal (amplitude center) of the intermediate section 2 above the middle value, the section 2 is set to be less than the middle value of the above-mentioned paragraph 3 and the electric potential of the positive signal 3 negative polarity electric potential of the signal (amplitude center) of the intermediate section 3 intermediate value is high.

In section 1 the thickness of the liquid crystal section ≥ 2 the thickness of the liquid crystal layer> section 3 the thickness of the liquid crystal layer of the multi-gap structure in the liquid crystal display device, section 3 pixel of the liquid crystal capacitance> section 2 section ≥ the liquid crystal capacitor of the pixel 1 pixel of the liquid crystal capacitor, thus in subsection 1 pixel-section 3 pixel in the display the same gray scale, a section 1 of the feed-through voltage of the pixel section ≥ 2 pixel in the feed-through voltage> section 3 of the feed-through voltage of the pixel. Therefore, as described above, if the section 1 intermediate value of subsection ≥ 2 intermediate value> section 3 intermediate value, between pixels can be compensated on the feed-through voltage is different, the ghost of the pixel can be improved and the like.

In this liquid crystal display device, can also constitute the section 1 the liquid crystal layer is arranged in the section 1 of the pixel is the pixel electrode and the common electrode, paragraph 2 the liquid crystal layer is arranged in the section 2 including the pixel of the pixel electrode and the common electrode, section 3 the liquid crystal layer is arranged in the section 3 including the pixel of the pixel electrode and the common electrode, the above-mentioned paragraph 1 intermediate value-section 3 intermediate value are respectively set to be larger than the electric potential of the above-mentioned common electrode is high.

In this liquid crystal display device, can also constitute the section 1 is intermediate to the above-mentioned common electrode with the electric potential of the section of the display of the above-mentioned gray level 1 in pixel value of the feed-through voltage, section 2 is intermediate to the above-mentioned common electrode with the electric potential of the above-mentioned gray scale of the display section 2 of the pixel in the value of the feed-through voltage, section 3 intermediate value is to the above-mentioned common electrode with the electric potential of the above-mentioned gray scale of the display section 3 in pixel value of the feed-through voltage.

In this liquid crystal display device, but also can to constitute with section 1 the color of the pixel corresponding to the wavelength of the section 2 the color of the pixel corresponding to the long wavelength, and the section 2 of the pixel corresponding to the wavelength than the color of the section 3 the color of the pixel corresponding to the long wavelength.

In this liquid crystal display device, can also constitute the section 1 corresponding to the red pixels, section 2 corresponding to the green picture element, section 3 corresponding to the blue pixel.

In this liquid crystal display device, can also constitute, set as the section 1 section = thickness of the liquid crystal layer 2 thickness of the liquid crystal layer> section 3 the thickness of the liquid crystal layer, the above-mentioned paragraph 1 = middle value of the section 2 of the intermediate value> section 3 intermediate value.

In this liquid crystal display device, can also be configured as the above-mentioned paragraph 1 intermediate value-section 3 intermediate value decided according to the above-mentioned gray scale levels.

In this liquid crystal display device, section 1-liquid crystal layer 3 VA mode of the liquid crystal layer.

In this liquid crystal display device, can also be constituted also with section 4 pixel, the second 4 pixel comprises a section 1 the liquid crystal layer is the following, paragraph 2 of the liquid crystal layer the thickness of more than 4 the liquid crystal layer is, when the in the above-mentioned section 4 with the specified pixel in the continuous display during 1 pixel-section 3 when the gray scale of pixels are the same, the section 4 pixel alternately supply section 4 and the electric potential of the positive signal 4 negative polarity potential, the above-mentioned section 1 for the above-mentioned value is set in the middle section 4 and the electric potential of the positive signal 4 to an intermediate value of the potential of the negative signal paragraph 4 above the middle value, the above-mentioned section 2 to an intermediate value set as the section 4 intermediate value the following.

In this liquid crystal display device, can also constitute the section 1 corresponding to the red pixels, section 2 corresponding to the green picture element, section 3 corresponding to the blue pixels, section 4 corresponding to the pixel and yellow.

In this liquid crystal display device, can also be constituted, is set to the above-mentioned paragraph 1 the thickness of the liquid crystal section = 2 resolution = thickness of the liquid crystal layer 4 thickness of the liquid crystal layer> section 3 the thickness of the liquid crystal layer, the above-mentioned paragraph 1 = middle value of the section 2 to an intermediate value = section 4 intermediate value> section 3 intermediate value.

The liquid crystal display device is characterized in that of the driving circuit, used for driving the liquid crystal display device, the liquid crystal display device includes a plurality of scanning signal lines, a plurality of data signal line, section 1 pixel, resolution 2 pixel section and 3 pixel, the second 1 pixel comprises a section 1 the liquid crystal layer, said section 2 pixel comprises a section 1 of the liquid crystal layer the thickness of the article 2 a liquid crystal layer, the section 3 comprises a ratio of the pixel 2 of the liquid crystal layer of small thickness of the section 3 the liquid crystal layer, in 1 scanning signal line from the selection state is changed to the non-selected state, to reduce the electric potential of the scanning signal lines, when in paragraph 1 pixel-section 3 with the specified pixel respectively during the continuous display of the same gray scale, the section 1 pixel alternately supply section 1 and the electric potential of the positive signal 1 negative polarity signal electric potential, to section 2 pixel alternately supply section 2 and the electric potential of the positive signal 2 negative polarity signal electric potential, to section 3 pixel alternately supply section 3 and the electric potential of the positive signal 3 negative polarity potential, the above-mentioned paragraph 1 and the electric potential of the positive signal 1 negative polarity electric potential of the signal value in the middle of the paragraph 1 to an intermediate value set to the above-mentioned section 2 and the electric potential of the positive signal 2 to an intermediate value of the potential of the negative signal of the section 2 above the middle value, the section 2 is set to be less than the middle value of the above-mentioned paragraph 3 and the electric potential of the positive signal 3 to an intermediate value of the potential of the negative signal of the section 3 intermediate value is high.

The liquid crystal display device is characterized in that driving method, used for driving the liquid crystal display device, the liquid crystal display device includes a plurality of scanning signal lines, a plurality of data signal line, section 1 pixel, resolution 2 pixel section and 3 pixel, the second 1 pixel comprises a section 1 the liquid crystal layer, said section 2 pixel comprises a section 1 of the liquid crystal layer the thickness of the article 2 a liquid crystal layer, the section 3 comprises a ratio of the pixel 2 of the liquid crystal layer of small thickness of the section 3 the liquid crystal layer, in 1 scanning signal line from the selection state is changed to the non-selected state, to reduce the electric potential of the scanning signal lines, when in paragraph 1 pixel-section 3 with the specified pixel respectively during the continuous display of the same gray scale, the section 1 pixel alternately supply section 1 and the electric potential of the positive signal 1 negative polarity signal electric potential, to section 2 pixel alternately supply section 2 and the electric potential of the positive signal 2 negative polarity signal electric potential, to section 3 pixel alternately supply section 3 and the electric potential of the positive signal 3 negative polarity potential,

The above-mentioned paragraph 1 and the electric potential of the positive signal 1 negative polarity electric potential of the signal value in the middle of the paragraph 1 to an intermediate value set to the above-mentioned section 2 and the electric potential of the positive signal 2 to an intermediate value of the potential of the negative signal of the section 2 above the middle value, the section 2 is set to be less than the middle value of the above-mentioned paragraph 3 and the electric potential of the positive signal 3 to an intermediate value of the potential of the negative signal of the section 3 intermediate value is high.

The television receiver is characterized in that, with the above-mentioned liquid crystal display device and receiving television broadcast tuning part.

The invention is not limited to the above-mentioned embodiments, according to the known technology, technical common sense properly changed by the above-mentioned embodiment mode, will be obtained by way of a combination of these are included in the embodiment of this invention. Furthermore, in embodiments described, the effect is only instantiated.

Industrial practicability

Liquid crystal display device of this invention and its driving circuit is suitable for, such as a liquid crystal television, liquid crystal monitor.

Note the Figure mark

SHR1023 electric potential of the positive signal (R1023 gray scale level display)

SLR1023 negative polarity signal electric potential (R1023 gray scale level display)

SMR1023 intermediate electric potential of the signal (R1023 gray scale level display)

EHR1023 positive polarity effective potential (R1023 gray scale level display)

ELR1023 effective potential of negative polarity (R1023 gray scale level display)

Δ QR1023 feed-through voltage (R1023 gray scale level display)

SHG1023 electric potential of the positive signal (G1023 gray scale level display)

SLG1023 negative polarity signal electric potential (G1023 gray scale level display)

SMG1023 intermediate electric potential of the signal (G1023 gray scale level display)

EHG1023 positive polarity effective potential (G1023 gray scale level display)

ELG1023 effective potential of negative polarity (G1023 gray scale level display)

Δ QG1023 feed-through voltage (G1023 gray scale level display)

SHB1023 electric potential of the positive signal (B1023 gray scale level display)

SLB1023 negative polarity signal electric potential (B1023 gray scale level display)

SMB1023 intermediate electric potential of the signal (B1023 gray scale level display)

EHB1023 positive polarity effective potential (B1023 gray scale level display)

ELB1023 effective potential of negative polarity (B1023 gray scale level display)

Δ QB1023 feed-through voltage (B1023 gray scale level display)

The common electrode potential Vcom

60 liquid crystal panel (VA normally black)

70 display control circuit

80 gate driver

90 source driver