Driving methods for color display device

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics, and provides for displaying at a viewing surface not only the colors of the three types of particles but also the colors of binary mixtures thereof.

Driving methods for color display device

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics.

Electro-phoretic display apparatus and driving method thereof

A driving method for an electro-phoretic display apparatus is disclosed. The method includes generating a common voltage by a common voltage generator held at a first voltage level before a polarity transfer, generating the common voltage held at a second voltage level when the polarity transfer starts during a first timing period, and generating the common voltage transfers held at a third voltage level during a second timing period after the first timing period, in which the second voltage level is between the first and the third voltageE levels.

ELECTRO-PHORETIC DISPLAY APPARATUS

An electro-phoretic display apparatus is disclosed. The electro-phoretic display apparatus has a plurality of pixel units and is coupled to an alternating current (AC) common voltage. The electro-phoretic display apparatus includes a switching unit coupled between a path of a plurality of storage capacitors in the pixel units and the common voltage. The switching unit is turned off according to a control signal before the common voltage carries out a transition action. The switching unit is turned on according to the control signal after the common voltage carries out the transition action. 1. An electro-phoretic display apparatus having a plurality of pixel units , the pixel units jointly coupled to an alternating current (AC) common voltage , the electro-phoretic display apparatus comprising:a switching unit coupled between a path of a storage capacitor in the pixel units and the common voltage, the switching unit is turned off according to a control signal before the common voltage carries out a transition action, and the switching unit is turned on according to the control signal after the common voltage carries out the transition action.2. The electro-phoretic display apparatus as claimed in claim 1 , further comprising:a control signal generator coupled to the switching unit for detecting a time point when the common voltage carries out the transition action, and generating the control signal according to the time point.3. The electro-phoretic display apparatus as claimed in claim 1 , wherein when the common voltage carries out the transition action claim 1 , a voltage level of the common voltage transitions from a first voltage level to a second voltage level claim 1 , or the voltage level of the common voltage transitions from the second voltage level to the first voltage level claim 1 , wherein the first voltage level is higher than the second voltage level.4. The electro-phoretic display apparatus as claimed in claim 1 , wherein when the switching unit is ...

SPATIALLY COMBINED WAVEFORMS FOR ELECTROPHORETIC DISPLAYS

The present invention is directed to a driving method for compensating the response speed change of an electrophoretic display due to temperature variation, photo-degradation or aging of the display device, without a complex structure (e.g., use of sensors). This is accomplished by combining two waveforms, one of which causes the grey level to become dimmer and the other waveform causes the grey level to become brighter, as the response speed degrades.

Driving methods for color display device

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics.

Electro-phoretic display apparatus

An electro-phoretic display apparatus is disclosed. The electro-phoretic display apparatus mentioned above includes a plurality of pixel unit lines, a plurality of common voltage transferring lines, and a common voltage generator. The common voltage transferring lines extend and connect to a common line segment directly along a layout direction. The common voltage generator generates a common voltage and provides the common voltage for directly electrically connecting to a connection point on the common line segment. Moreover, the transfer timing delays of transferring the common voltage from the connection point to the first common voltage transferring line and the last common voltage transferring line are the same.

DRIVING METHODS FOR COLOR DISPLAY DEVICE

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics, and provides for displaying at a viewing surface not only the colors of the three types of particles but also the colors of binary mixtures thereof 2. The method of claim 1 , wherein the first type of pigment particles is negatively charged and the second type of pigment particles is positively charged.3. The method of claim 1 , wherein the amplitude of the second driving voltage is less than 50% of the amplitude of the first driving voltage.4. The method of claim 1 , wherein steps (i) and (ii) are repeated at least 4 times.5. The method of claim 1 , further comprising applying a shaking waveform before step (i).6. The method of claim 5 , further comprising driving the pixel to the full optical characteristic of the first type of pigment particles after the shaking waveform but prior to step (i).8. The method of claim 7 , wherein steps (i) claim 7 , (ii) and (iii) are repeated at least 4 times.9. The method of claim 7 , further comprising applying a shaking waveform before step (i).10. The method of claim 9 , further comprising driving the pixel to the full optical characteristic of the first type of pigment particles after the shaking waveform but prior to step (i).11. The method of claim 1 , wherein the first period of time is 40 to 140 msec claim 1 , the second period of time is greater than or equal to 460 msec and steps (i) and (ii) are repeated at least seven times.13. The method of claim 12 , wherein steps (i)-(iv) are repeated at least 3 times.14. The method of claim 12 , further comprising applying a shaking waveform before step (i).15. The method of claim 12 , further comprising driving the pixel to the full optical characteristic of the first type of pigment particles after the shaking ...

Frequency conversion correction circuit for electrophoretic displays

A frequency conversion correction circuit for an electrophoretic display (EPD) which has a control circuit to capture pixel signals of a next picture and gets a corresponding update signal from a look up table to be output, and a driving circuit to provide a plurality set of potential difference signals corresponding to a plurality set of electrodes of an EPD panel according to the update signal. The EPD further has an environment detection device and a duty frequency judgment unit. The environment detection device detects the operation environments of the EPD and gets an environment parameter. The duty frequency judgment unit compares the preset signal value sections where the environment parameter is located and generates a duty frequency signal and sends to the driving circuit. The driving circuit changes and outputs the frequency of the potential difference signals in a fixed frame time according to the duty frequency signal.

Driving methods to produce a mixed color state for an electrophoretic display

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics, and provides for displaying at a viewing surface not only the colors of the three types of particles but also the colors of binary mixtures thereof.

DRIVING METHOD OF ELECTROPHORETIC DISPLAY

A driving method of an electrophoretic display having at least one display particle is provided. The driving method includes the following steps. A first voltage difference is applied to a data line in a first period, in which the data line corresponds to one of the display particles. At least one particle restore period is inserted in the first period, and a second voltage difference is applied to the data line in the particle restore periods, in which the second voltage difference is different from the first voltage difference. With this method disclosed here, the maxima brightness, maxima darkness, contrast ratio, color saturation, bistability, and image updating time can be largely improved. 1. A driving method of an electrophoretic display , the electrophoretic display having at least one display particle , the driving method comprising:applying a first voltage difference to a data line in a first period, wherein the data line corresponds to one of the display particles; andinserting at least one particle restore period in the first period, and respectively applying a second voltage difference to the data line in the particle restore periods, wherein the second voltage difference is different from the first voltage difference, and when more than one particle restore periods are inserted, the particle restore periods are not adjacent to each other.2. The driving method of the electrophoretic display as claimed in claim 1 , wherein the first period is a pre-charge period claim 1 , a gray-level write period claim 1 , a reset period claim 1 , or a frame follow period.3. The driving method of the electrophoretic display as claimed in claim 1 , wherein the first voltage difference and the second voltage difference are formed between the data line and a common electrode of the electrophoretic display.4. The driving method of the electrophoretic display as claimed in claim 1 , wherein when more than one particle restore periods are inserted claim 1 , the second voltage ...

ELECTRO-PHORETIC DISPLAY APPARATUS AND DRIVING METHOD THEREOF

A driving method for an electro-phoretic display apparatus is disclosed. The method includes generating a common voltage by a common voltage generator held at a first voltage level before a polarity transfer, generating the common voltage held at a second voltage level when the polarity transfer starts during a first timing period, and generating the common voltage transfers held at a third voltage level during a second timing period after the first timing period, in which the second voltage level is between the first and the third voltage levels.

Driving methods to produce a mixed color state for an electrophoretic display

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics, and provides for displaying at a viewing surface not only the colors of the three types of particles but also the colors of binary mixtures thereof.

Spatially combined waveforms for electrophoretic displays

The present invention is directed to a driving method for compensating the response speed change of an electrophoretic display due to temperature variation, photo-degradation or aging of the display device, without a complex structure (e.g., use of sensors). This is accomplished by combining two waveforms, one of which causes the grey level to become dimmer and the other waveform causes the grey level to become brighter, as the response speed degrades.

DRIVING METHODS FOR COLOR DISPLAY DEVICE

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics. 2. The method of claim 1 , wherein the first type of pigment particles is negatively charged and the second type of pigment particles is positively charged.3. The method of claim 1 , wherein the amplitude of the second driving voltage is less than 50% of the amplitude of the first driving voltage.4. The method of claim 1 , wherein steps (i) and (ii) are repeated at least 4 times.5. The method of claim 1 , further comprising a shaking waveform before step (i).6. The method of claim 5 , further comprising a driving step to the full color state of the first type of pigment particles after the shaking waveform but prior to step (i).8. The method of claim 7 , wherein the first type of pigment particles is negatively charged and the second type of pigment particles is positively charged.9. The method of claim 7 , wherein the amplitude of the second driving voltage is less than 50% of the amplitude of the first driving voltage.10. The method of claim 7 , wherein steps (i) claim 7 , (ii) and (iii) are repeated at least 4 times.11. The method of claim 7 , further comprising a shaking waveform before step (i).12. The method of claim 11 , further comprising a driving step to the full color state of the first type of pigment particles after the shaking waveform but prior to step (i).13. The method of claim 1 , wherein the first period of time is 40 to 140 msec claim 1 , the second period of time is greater than or equal to 460 msec and steps (i) and (ii) are repeated at least seven times.15. The method of claim 14 , wherein the first type of pigment particles is negatively charged and the second type of pigment particles is positively charged.16. The method of claim 14 , wherein the amplitude of the second driving ...

ELECTRO-PHORETIC DISPLAY APPARATUS

An electro-phoretic display apparatus is disclosed. The electro-phoretic display apparatus mentioned above includes a plurality of pixel unit lines, a plurality of common voltage transferring lines, and a common voltage generator. The common voltage transferring lines extend and connect to a common line segment directly along a layout direction. The common voltage generator generates a common voltage and provides the common voltage for directly electrically connecting to a connection point on the common line segment. Moreover, the transfer timing delays of transferring the common voltage from the connection point to the first common voltage transferring line and the last common voltage transferring line are the same.

DRIVING METHODS TO PRODUCE A MIXED COLOR STATE FOR AN ELECTROPHORETIC DISPLAY

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics, and provides for displaying at a viewing surface not only the colors of the three types of particles but also the colors of binary mixtures thereof. 2. The method of claim 1 , wherein the duration of the third period of time is from about 20 to about 40 percent of the duration of the first period of time.3. The method of claim 1 , further comprising applying a shaking waveform prior to step (i).4. The method of claim 3 , further comprising applying claim 3 , prior to the shaking waveform claim 3 , a driving voltage driving the first type of pigment particles towards the first surface. This application is a continuation of U.S. patent application Ser. No. 15/496,604, filed Apr. 25, 2017, and published as U.S. 2017/0263176, which is a continuation-in-part of U.S. patent application Ser. No. 14/507,737, filed Oct. 6, 2014, now U.S. Pat. No. 10,339,876, which claims the benefit of U.S. Provisional Applications Nos. 61/887,821, filed Oct. 7, 2013; 61/925,055, filed Jan. 8, 2014; 61/942,407, filed Feb. 20, 2014; 61/979,464, filed Apr. 14, 2014; and 62/004,713, filed May 29, 2014. The contents of the above-identified applications and of all other United States patents and published applications referred to below are incorporated herein by reference in their entireties.The present invention is directed to driving methods for color display devices to display high quality color states.In order to achieve a color display, color filters are often used. The most common approach is to add color filters on top of black/white sub-pixels of a pixellated display to display the red, green and blue colors. When a red color is desired, the green and blue sub-pixels are turned to the black state so that the only color ...

DRIVING METHOD OF ELECTROPHORETIC DISPLAY

A driving method of an electrophoretic display having at least a display particle is provided. The driving method includes the following steps. A first voltage difference is applied to a data line in a first period, in which the data line corresponds to one of the display particles. At least a particle restore period is inserted in the first period, and a second voltage difference is applied to the data line in the particle restore periods, in which the second voltage difference is different from the first voltage difference. With this method disclosed here, the maxima brightness, maxima darkness, contrast ratio, color saturation, bistability, and image updating time can be largely improved.

DRIVING METHODS TO PRODUCE A MIXED COLOR STATE FOR AN ELECTROPHORETIC DISPLAY

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics, and provides for displaying at a viewing surface not only the colors of the three types of particles but also the colors of binary mixtures thereof. 1. A driving method for an electrophoretic display comprising a first surface on the viewing side , a second surface on the non-viewing side and an electrophoretic fluid which comprises a first type of particles , a second type of particles and a third type of particles , all of which are dispersed in a liquid , whereina) the three types of pigment particles have optical characteristics differing from one another;b) the first type of pigment particles and the second type of pigment particles carry opposite charge polarities; andc) the third type of pigment particles has the same charge polarity as the second type of pigment particles but a lower zeta potential,the method comprising the following steps:(i) applying a first driving voltage to a pixel in the electrophoretic display for a first period of time, the first driving voltage having a polarity driving the second type of pigment particles towards the first surface, thereby causing the pixel to display the optical characteristic of the second type of pigment particles at the first surface; and(ii) applying a second driving voltage to the pixel for a second period of time, the second driving voltage having the same polarity as, but a lower magnitude than the first driving voltage, thereby driving the third type of pigment particles at the first surface, and producing a mixture of the optical characteristics of the second and third types of particles at the first surface.2. The method of claim 1 , further comprising applying a shaking waveform prior to step (i).3. The method of claim 1 , wherein the ...

Multiplex electrophoretic display driver circuit

A multiplex electrophoretic display driver circuit comprises a memory unit, a display controller and a voltage driving unit. The memory unit has two registers respectively storing the current and former gray-level matrix signals. The gray-level matrix signal contains gray-level data corresponding to electrophoretic pixels. The display controller has an encoding circuit and a counting circuit. The encoding circuit generates a difference-value matrix signal containing difference values according to a difference between the current and former gray-level matrix signals and then generates a voltage-difference matrix signal containing voltage-difference signals corresponding to the electrophoretic pixels. The counting circuit receives the difference-value matrix signal and counts to generate refreshing values corresponding to the difference values. The encoding circuit adds the refreshing values to a next-cycled difference-value matrix signal to generate a new voltage-difference matrix signal. The voltage driving unit drives the electrophoretic pixels according to the voltage-difference matrix signal.

Driving methods for color display device

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics.

Electro-phoretic display apparatus

Driving methods for color display device

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics.

Driving methods for color display device

The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics.

Drive methods for color display device

Un método de accionamiento para una pantalla electroforética que comprende una primera, superficie (16) de visión, una segunda, superficie (17) de no visión y un fluido electroforético intercalado entre un electrodo común (14) adyacente a la primera superficie (16) y una capa de electrodos (15a) de píxel adyacente a la segunda superficie (17), comprendiendo el fluido electroforético un primer (11), segundo (12) y tercer (13) tipos de partículas de pigmento, todas dispersadas en un disolvente o una mezcla de disolventes, en donde (a) los tres tipos (11, 12, 13) de partículas de pigmento tienen características ópticas que difieren entre sí; (b) el primer tipo (11) de partículas de pigmento y el segundo tipo (12) de partículas de pigmento tienen polaridades de carga opuestas; y (c) el tercer tipo (13) de partículas de pigmento tiene la misma polaridad de carga que el segundo tipo (12) de partículas de pigmento, pero a una intensidad menor, comprendiendo el método: (i) aplicar una primera tensión (VH2) de accionamiento a un píxel en la pantalla electroforética durante un primer período de tiempo (t4; t8; t26), en el que la primera tensión (VH2) de accionamiento tiene una polaridad que mueve el primer tipo (11) de partículas de pigmento adyacente al electrodo común (14), haciendo que el píxel presente las características ópticas (W) del primer tipo (11) de partículas de pigmento en la primera superficie (16); estando caracterizado el método por: (ii) aplicar una segunda tensión (V') de accionamiento al píxel durante un segundo período de tiempo (t5; t9; t28), en el que la segunda tensión (V') de accionamiento tiene una magnitud inferior a la de la primera tensión (VH2) de accionamiento y una polaridad que mueve el tercer tipo (13) de partículas de pigmento adyacente al electrodo común (14), haciendo que el píxel presente la característica óptica (R) del tercer tipo (13) de partículas de pigmento en la primera superficie (16); y repetir las operaciones (i) e (ii) ...

用於電泳顯示器之空間組合波形

Spatially combined waveforms for electrophoretic displays

Driving method of electrophoretic display