Optical touch display panel

[Technical Field]

This invention is related to a touch-sensitive display panel, and in particular to an optical touch control display panel.

[Background Art]

The touch panel in accordance with its sensing mode can be distinguished by the different resistance-type touch-control panel, the capacitive type touch control panel, the optical touch panel is, electromagnetic and acoustic wave type touch panel of the touch-control panel. Because the optical touch panel touch control mechanism suitable for application in a large-size in the display panel, therefore, large-size display panel most touch control function is achieved by an optical touch control mechanism. At present most optical touch-control display panel using infrared light as the light source, and optical sensor using a complementary metal-oxide-semiconductor (CMOS optical   sensor) to sense infrared light in order to calculate the position of the button. In the prior art, the infrared light corresponding to the display panel the intensity of the edge will usually be some relatively weak, so that when the edge of the display panel when the user touches, complementary metal-oxide-semiconductor optical sensor sensed touch control signal strength is relatively weak, due to the touch signal is difficult to be detected, and then causing the touch sensitivity drop. Generally, distance complementary metal-oxide-semiconductor optical sensor is far corner of, its touch control poor sensitivity, even the faulty action is easy to occur.

[Content of the invention]

The present invention provides an optical touch control display panel, has a uniform sensing light source.

This invention proposes a kind of optical touch control display panel, which comprises a liquid crystal display panel, and at least one sensing component feeding one side-lighting type back light source. Sensing assembly is disposed on the edge of the liquid crystal display panel. Back light-incident side of the light source is disposed below the liquid crystal display panel. Side edge enters the optical back light source comprises a light guide plate, a plurality of 1st light source, a plurality of 2nd light source and a plurality of auxiliary light source. The light guide plate is located below the liquid crystal display panel, wherein the sensing component corresponding to one of the corner of the light guide plate. 1st light source is suitable for providing a visible light-guide plate. 2nd light source is suitable for providing a non-visible light-guide plate. The auxiliary light source is suitable for providing an auxiliary non-visible light-guide plate, wherein the auxiliary light source is disposed for the remaining corners of the light guiding plate. When the liquid crystal display panel is touched, passes through the liquid crystal display panel of the non-visible light and auxiliary non-visible light is scattered, and the sensing component is suitable for detecting the non-visible light is scattered with the auxiliary non-visible light in order to calculate the position of the button.

In one embodiment of the invention, the above-mentioned non-visible light as a infrared light, and the sensing component comprises an infrared sensing assembly.

In one embodiment of the invention, the above-mentioned to infrared sensing assembly includes a complementary metal-oxide-semiconductor optical sensor.

In one embodiment of the invention, the above-mentioned sensing assembly in the number of 2 a, are respectively arranged on the liquid crystal display panel and the two adjacent corners.

In one embodiment of the invention, the above-mentioned part of the light source and the part of the 1st 2nd 1st light source are integrated into a light strip, the rest of the light source and the 1st 2nd 2nd light source are integrated into a light strip. Furthermore, the light strip 1st and 2nd light of the second light guiding plate disposed respectively on opposite sides of the.

In one embodiment of the invention, the above-mentioned 1st light strip is arranged in between the sensing assembly.

In one embodiment of the invention, the auxiliary light source is integrated into a plurality of light strips and the 3rd, and 3rd light strip is arranged in the corner of the light guide plate.

In one embodiment of the invention, the above 3rd the extending direction of the light strip is substantially perpendicular to the extending direction of the light strip 2nd.

In one embodiment of the invention, the above-mentioned of the direction of arranging the auxiliary light source is substantially perpendicular to the arrangement direction of the 2nd light source.

In one embodiment of the invention, the above-mentioned auxiliary light source is integrated to the 2nd light strip, and is distributed to the two ends of the light stripe is 2nd.

In one embodiment of the invention, the above-mentioned auxiliary light source the arrangement direction of the light source substantially parallel to the direction of arranging the 2nd.

In one embodiment of the invention, the above-mentioned visible light is a white light.

Furthermore, this invention has also proposed another optical touch control display panel, which comprises a liquid crystal display panel, and at least one sensing component feeding one side-lighting type back light source. Sensing assembly is disposed on the edge of the liquid crystal display panel. Back light-incident side of the light source is disposed below the liquid crystal display panel. Side edge enters the optical back light source comprises a light guide plate, a plurality of 1st and 2nd light source of a plurality of the light source. The light guide plate is located below the liquid crystal display panel, wherein the sensing component corresponding to one of the corner of the light guide plate. 1st light source is suitable for providing a visible light-guide plate. 2nd light source is suitable for providing a non-visible light-guide plate, wherein the adjacent corner of the light guide plate provided by the 2nd light source part of the non-visible light intensity I₁ 2nd light source provided by the higher than the rest of the non-visible light intensity I₂. When the liquid crystal display panel is touched, passes through the liquid crystal display panel of the non-visible light is scattered, and the sensing component is suitable for detecting the non-visible light is scattered with the auxiliary non-visible light in order to calculate the position of the button.

In one embodiment of the invention, the corner of the light guide plate adjacent to the part of the light-emitting efficiency of the light source has a 2nd E1, and 2nd light source has light-emitting efficiency of the E2, and E1> E2.

In one embodiment of the invention, the corner of the light guide plate adjacent to the part of the light source has a 2nd power P1, while the remaining 2nd light source with power P2, and P1> P2.

In one embodiment of the invention, adjacent to the corner of the light guide plate integrated part of the 1st 2nd light source in the light source part.

Based on the above, the embodiment of the invention through the reinforcing corner of the light guide plate of the non-visible light source of non-visible light intensity, in order to promote the sensing light source (uniformity) uniformity in the sensing region, optical touch-control so as to improve the sensitivity of the display panel.

To allow the above-mentioned feature of the present invention and can be more obvious and easy to understand, lifts especially embodiment below, and the following is a description of the attached-schema in detail.

[Description of drawings]

Fig. 1 is the implementation of the invention the touch control 1st in example optics schematic diagram of the display panel.

Chart 2 2nd implementation for this invention the touch control in example optics schematic diagram of the display panel.

Figure 3 3rd implementation for this invention the touch control in example optics schematic diagram of the display panel.

[Main assembly description of symbols]

100,200,300: optical touch control display panel

110: liquid crystal display panel

112a, 112b: base plate

114: liquid crystal layer

116: pixel array

120: sensing assembly

130: side edge of the back light source enters the optical

132: the light guide plate

134 : 1st light source

136,236a, 236b: 2nd light source

138: auxiliary light source

140: touch-control signal read-out circuit

A-C: corner

E1, E2: regional

L1: visible light

L2-L5: non-visible light

P1-P3: dot

F: finger

LB1: 1st light strip

LB2: 2nd light strip

LB3: 3rd light strip

[Mode of execution]

[1st embodiment]

Fig. 1 is the implementation of the invention 1st in example optics touch-control display panel schematic, wherein the diagram 1 for the upper part of the profiles of optical touch-sensitive display panel, and Figure 1 of the optical touch-sensitive display panel below the upper view. Requests with reference to Figure 1, the embodiment of the optical touch-control display panel 100 comprises a liquid crystal display panel 110, at least one sensing component feeding one side-lighting type backlight source 120 and 130. Sensing assembly 120 is disposed on the liquid crystal display panel 110 of the edge, and side edge enters the optical source 130 is disposed on the liquid crystal display panel 110 below.

Side edge enters the optical source 130 comprises a light guide plate 132, a plurality of 1st light source 134 and a plurality of 2nd light source 136. The light guiding plate 132 is located in the liquid crystal display panel 110 below, wherein the sensing assembly 120 corresponding to the light guide plate 132 A one of the corner. 1st light source 134 is suitable for providing a visible light L1-guide plate 132, and the visible light L1 through the liquid crystal display panel 110 produce a modulation of the Image. 2nd light source 136 is suitable for providing a non-visible light L2-guide plate 132. The auxiliary light source 138 is suitable for providing an auxiliary non-visible light L3-guide plate 132, wherein the auxiliary light source 138 is disposed the light guide plate 132 B of the remaining corner, C.

In detail, the part of the 1st embodiment of the light source 134 and 2nd light source part 136 are integrated into a light strip 1st LB1 (light   bar), while the remainder of the 1st light source 134 and 2nd light source 136 are integrated into a light strip 2nd LB2. 1st light strip LB1 and LB2 2nd light strip configuration light guiding plate, respectively 132 to the side of (that is, the liquid crystal display panel 110 to the edge of the two), and the light strip 1st LB1 is, for example, is disposed on the sensing assembly 120 between. Furthermore, the auxiliary light source 138 the arrangement direction of the light source is essentially perpendicular to the 2nd 136 the arrangement direction.

Furthermore, as shown in Figure 1, the auxiliary light source 138 are a plurality of the integration of the light strip 3rd LB3, the light strips and the 3rd LB3 for example, the number of 2 bar, and are respectively provided with the light guide plate 132 B the corner, C. Furthermore, the light strip 3rd LB3 of which is substantially perpendicular to the extension direction of the light strip 2nd LB2 in the extending direction of the. It is worth noting that, in other possible embodiments, the light strip 2nd LB2 and LB3 3rd light strip can also be integrated into a single light strip further, in order to reduce the assembly cost and the assembling time.

In this embodiment, when the liquid crystal display panel 110 of the close to the corner dot P1 is being touched, passes through the liquid crystal display panel 110 part of the non-visible light L2 (i.e. touch point P1 the non-visible light L2) and the auxiliary non-visible light L3 will be scattered, and the sensing assembly 120 is scattered is suitable for detecting the non-visible light L2 and the auxiliary non-visible light L3 in order to calculate the dot P1 position. In detail, when the user uses a finger F touch liquid crystal display panel 110, the, button P1 the non-visible light L2 and the auxiliary non-visible light L3 will be scattering. And these scatter part of the non-visible light L2 and the auxiliary non-visible light L3 will move toward the sensing assembly 120 transfer, and then make the sensing assembly 120 can calculate the dot P1 position. It is worth mentioning that, the embodiment is by configuring the auxiliary light source 138 of the light guiding plate 132 B of the remaining corner, C, in order to improve the sensing assembly 120 to the distance of the dot of a sensing measure.

On the other hand, the embodiment of the liquid crystal display panel 110 is, for example, a penetration (transmissive) liquid crystal display panel or a half-transmissive and semi-reflective (transflective) liquid crystal display panel. As shown in Figure 1, the liquid crystal display panel 110 includes, for example, two base plate 112a and 112b, located on two base plate 112a and 112b of the liquid crystal layer is disposed on the base plate 114 and 112a of the pixel array 116. When the visible light L1 through the liquid crystal display panel 110 of the liquid crystal layer 114 with the pixel array 116 will be produced after an Image. Furthermore, because the transmissive liquid crystal display panel and the semi-transmissive and semi-reflective liquid crystal display panel have a certain degree of light-transmitting area, therefore from these light-transmitting area of the non-penetrating through visible light L2 and the auxiliary non-visible light L3 can be used as a touch panel sensing light source.

Please continue with reference to Figure 1, the embodiment of the sensing assembly 120 for example, the number of 2 a, and are respectively arranged on the liquid crystal display panel 110 of the two adjacent corners, and each sensing assembly 120 can be according to the detected non-visible light L2 and the auxiliary non-visible light L3 to an angle of incidence of touch point P1 position. In detail, when the liquid crystal display panel 110 when being touched, dot P1 of the non-visible light L2 and the auxiliary non-visible light L3 will be scattering, and then make the sensing assembly 120 detecting scattering of the non-visible light L2 and the auxiliary non-visible light L3. Furthermore, with the sensing assembly 120 is electrically connected with the touch control signal readout circuit 140 will be according to the sensing assembly 120 to the signal transmitted by the projected dot P1 position. In this embodiment, visible light L1 such as a white light, non-visible light L2 for example, a infrared light, which is used for the detection non-visible light L2 sensing assembly 120 such as the infrared light sensing assembly. For example, the above-mentioned infrared light sensing component can be a complementary metal-oxide-semiconductor optical sensor.

On the whole, through the above-mentioned methods, the light source can be enhanced (that is, the embodiment of the non-visible light L2 and L3) the uniformity of the in the sensing region, and then increase the optical touch-control display panel 100 sensitivity.

[2nd embodiment]

Figure 2 for this invention the 2nd in example optics touch-control display panel schematic, wherein the diagram 2 of the top profile of the optical touch-sensitive display panel, and Figure 2 the lower part of the optical touch-sensitive display panel is the upper view. The embodiment of the optical touch-control display panel 200 with the Figure 1 optical touch-control display panel 100 similar, however, the main difference between the two is characterized in that: the embodiment of the auxiliary light source 138 of 2nd light LB2 is integrated to the upper, light strips and the 2nd and LB2 are distributed on the two ends of the, such as the area E1 and E2. Furthermore, the auxiliary light source 138 the arrangement direction of the light source substantially parallel to the 2nd 136 the arrangement direction.

Through this embodiment of the non-visible light will be provided by the auxiliary light source 138 of 2nd light LB2 is integrated to the two ends of the, in order to make the optical touch-control display panel 200 can have uniform sensing light source, [...] assembly 120 of the dot is relatively far from its P2 optical measurement. Viewing from another angle, the embodiment of the light strip 2nd LB2 by increasing the two ends of the number of the non-visible light source, the sensing light source so as to improve the uniformity of the in the sensing region, and then increase the optical touch-control display panel 200 degree of sensitivity.

[3rd embodiment]

Figure 3 3rd implementation for this invention the touch control in example optics schematic diagram of the display panel, wherein the diagram 3 for the upper part of the profiles of optical touch-sensitive display panel, and Figure 3 is the lower part of the optical touch control display panel of the upper view. The embodiment of the optical touch-control display panel 300 with the Figure 1 optical touch-control display panel 100 similar, however, the main difference between the two is characterized by: optical touch control display panel 300 2nd light source the 236a, does not adopt the Figure 1 the auxiliary light source in the 138. In detail, the optical touch-control display panel 300 includes a plurality of 2nd light source 236a, 236b. 2nd light source 236a, 236b is suitable for providing non-visible light L4, L5-guide plate 132, wherein the light guiding plate 132 is arranged in the liquid crystal display panel 110 below.

In this embodiment, adjacent to the light guiding plate 132 or a liquid crystal display panel 110 of corner B, the light source part of the 2nd C 236a of the non-visible light intensity I₁ 2nd light source is higher than the remaining 236b of the non-visible light intensity I₂. When the liquid crystal display panel 110 in dot of P3 when being touched, passes through the liquid crystal display panel 110 of the non-visible light L4 and L5 is scattered, so that the sensing assembly 120 is scattered to sense the non-visible light L4, L5 in order to calculate the dot P3 position.

Furthermore, in this embodiment, adjacent to the light guide plate 132 corner B, the light source part of the 2nd C 236a with light-emitting efficiency, for example, E1, and the remaining light source 2nd 236b with light-emitting efficiency, for example, E2, and E1> E2. Therefore, the high light-emitting efficiency of the light source 2nd 236a is disposed in the liquid crystal display panel 110 of corner B, C, can increase the sensing assembly 120 of the dot is relatively far from its sensing measure of, thus improving the optical touch-control display panel 300 touch sensitivity.

Furthermore, in other embodiments, power can be also 2nd the light source is arranged on the liquid crystal display panel 110 of corner B, to achieve C the same efficacy. For example, adjacent to the light guide plate 132 (or a liquid crystal display panel 110) corner B, the light source part of the 2nd C 236a for example, have power P1, while the remaining light source 2nd 236b with power P2, and P1> P2. The large size of the selected light source 2nd 236a or in the over-drive (over   drive) to drive the light source 2nd 236a can produce the above-mentioned of the light source of high power 2nd 236a.

On the other hand, in another embodiment, adjacent to the light guiding plate 132 or a liquid crystal display panel 110 corner B, 2nd light source C part 236a can also be integrated in part 1st light source 134 in. In detail, the adjacent corner of the 1st or B C light source 134 is included in the package (package) 2nd light source 236a, and then can make the 2nd light source 236a of the non-visible light intensity of the light source is higher than the remaining 2nd 236b of the non-visible light intensity. Viewing from another angle, similar to the embodiment of the above-mentioned practice by increasing the 2nd 2nd light source 136 in order to produce the homogeneous the number of practice of sensing light source.

To sum up, the embodiment of the invention through the reinforcing corner of the light guide plate of the non-visible light source of non-visible light intensity, in order to detect the light source in the sensing region enhance the uniformity of the in, thereby further improving the optical touch-control display panel of the touch-control sensitivity.

Although the embodiment of the invention has been disclosed above, but its not in order to limit the invention, in any of the holders usually Technical Field, without departing from the spirit of this invention and range, slight changes can be made when the retouch, the scope of protection of this invention attached apparent the scope of the Patent application of whichever is defined.