CN113870803B - Electronic paper display device and driving method thereof - Google Patents

Abstract

The application discloses an electronic paper display device and a driving method thereof. The driving method of the electronic paper display device provided by the embodiment of the application comprises the following steps: according to an image to be displayed, in a pre-charging stage, applying a driving signal corresponding to the sub-pixel row of the (N-1) th row to a second electrode in the sub-pixel row of the Nth row; wherein N is an integer greater than 1; according to an image to be displayed, in a charging stage after a pre-charging stage, applying a driving signal corresponding to the sub-pixel row in the Nth row to the second electrode in the sub-pixel row in the Nth row; the voltage value of the drive signal is not zero during the charging phase.

Description

An electronic paper display device and its driving method

technical field

The present application relates to the field of display technology, in particular to an electronic paper display device and a driving method thereof.

Background technique

The electronic paper display device has the effects of eye protection and power saving, and thus has received extensive attention.

The electronic paper display device includes a plurality of microstructures and a first electrode and a second electrode arranged on opposite sides of each microcup, each microcup is encapsulated with electrophoretic particles, and the electrophoretic particles include black particles, red particles and white particles . The electronic paper display device controls the electric field generated by the first electrode and the second electrode to control multiple microstructures to display different colors, so as to realize display. The conventional black, white and red three-color e-paper waveform design is not pre-charged. When there is pre-charging, such as the upper row of red screens and the next row of white screens, after the white screen is written, only 0 volts of electrons will be written in the white screen after pre-charging, and the white charged particles will not be driven again. However, due to the existence of pre-charging, the red screen in the previous row will be written into the screen in this row, causing the white screen to turn red. That is, pre-charging will cause picture confusion and affect the display effect.

Contents of the invention

Embodiments of the present application provide an electronic paper display device and a driving method thereof, so as to avoid image disturbance caused by pre-charging.

An embodiment of the present application provides a method for driving an electronic paper display device. The electronic paper display device includes: a plurality of sub-pixel rows; the sub-pixel row includes a plurality of sub-pixels; The first electrode on the display side of the microstructure is located at the second electrode on the side away from the display; the microstructure includes: charged particles of the first color, charged particles of the second color and charged particles of the third color; the method includes:

According to the image to be displayed, in the precharging stage, a driving signal corresponding to the N-1th row of subpixel rows is applied to the second electrode in the Nth row of subpixel rows; wherein, N is an integer greater than 1;

According to the image to be displayed, in the charging phase after the pre-charging phase, a driving signal corresponding to the Nth sub-pixel row is applied to the second electrode in the Nth sub-pixel row; the voltage value of the driving signal is not zero in the charging phase.

In some embodiments, according to the image to be displayed, in the charging phase after the pre-charging phase, a driving signal corresponding to the N-th sub-pixel row is applied to the second electrode in the N-th sub-pixel row, specifically including:

When the sub-pixel displays the first color, apply the first driving signal to the second electrode; the first driving signal includes: the first level signal applied in the charging phase; the first level signal is used to: make the first color The charged particles are near the display side of the electronic paper display device.

In some embodiments, according to the image to be displayed, in the charging phase after the pre-charging phase, applying a driving signal corresponding to the N-th sub-pixel row to the second electrode in the N-th sub-pixel row, further comprising:

In the case that the sub-pixel displays the second color, a second driving signal is applied to the second electrode; the second driving signal includes: a second level signal applied in the charging phase; the second level signal is used to: make the second color The charged particles are near the display side of the electronic paper display device.

In some embodiments, according to the image to be displayed, in the charging phase after the pre-charging phase, applying a driving signal corresponding to the N-th sub-pixel row to the second electrode in the N-th sub-pixel row, further comprising:

In the case that the sub-pixel displays a third color, a third driving signal is applied to the second electrode; the third driving signal includes a third level signal and a fourth level signal applied in sequence during the charging phase; the third level signal is used for For: pulling the charged particles of the first color away from the display side; the fourth level signal is used for: making the charged particles of the third color approach the display side of the electronic paper display device.

In some embodiments, the start time of the charging phase is the same as the start time of the third level signal, and the duration of the third level signal is the same as the duration of the pre-charging phase.

In some embodiments, the third driving signal in the writing phase includes a plurality of pulse units; the pulse unit includes a third level signal and a fourth level signal applied in sequence;

The start time of the charging phase is the same as the start time of the third level signal in the first pulse unit, and the end time of the charging phase is the same as the end time of the fourth level signal in the first pulse unit.

In some embodiments, the first level signal is electrically identical to the fourth level signal, and the absolute voltage value of the first level signal is greater than the absolute voltage value of the fourth level signal;

The electrical properties of the second level signal and the third level signal are opposite to those of the first level signal;

The absolute voltage value of the fourth level signal is smaller than the absolute voltage value of the third level signal;

The absolute voltage value of the second level signal is equal to the voltage absolute value of the third level signal.

In some embodiments, the duration of the pre-charging phase is greater than or equal to 0.1H and less than or equal to 0.2H, wherein H is the duration of the charging phase.

An electronic paper display device provided in an embodiment of the present application, the electronic paper display device includes: a plurality of sub-pixel rows; the sub-pixel row includes a plurality of sub-pixels; the sub-pixel: includes a microstructure, located on the display side of the microstructure close to the electronic paper display device The first electrode, the second electrode on the side away from the display of the microstructure; the microstructure includes: charged particles of the first color, charged particles of the second color, and charged particles of the third color. The electronic paper display device also includes: a processor; the processor is used for The embodiment of the present application provides a driving method for driving an electronic paper display device.

In some embodiments, the first color charged particles are black charged particles, the second color charged particles are white charged particles, and the third color charged particles are red charged particles.

The electronic paper display device and its driving method provided in the embodiments of the present application are provided with a pre-charging stage, so as to ensure the charging time of the sub-pixels, effectively charge the sub-pixels, and ensure that the second electrodes in the sub-pixels reach the correct voltage. Moreover, since the voltage value of the driving signal applied to the second electrode in the Nth row of subpixels in the charging stage after the precharging stage is not zero, even if the Nth row of subpixels in the precharging stage is written to the drive of the previous row of subpixels Signal, the driving signal whose voltage value is not zero will still drive the Nth row of sub-pixels to display their corresponding colors, preventing the Nth row of sub-pixels from displaying the color of the N-1th row of sub-pixels, thereby avoiding screen confusion and improving display effect and improve user experience.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

FIG. 1 is a schematic diagram of an electronic paper display device provided in an embodiment of the present application;

FIG. 2 is a schematic cross-sectional structure diagram of an electronic paper display device provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of a driving method of an electronic paper display device provided in an embodiment of the present application;

FIG. 4 is a timing diagram of a driving method of an electronic paper display device provided in an embodiment of the present application;

FIG. 5 is a schematic diagram of the movement of charged particles in a method for driving an electronic paper display device according to an embodiment of the present application;

FIG. 6 is a waveform diagram of a pre-charging phase and a charging phase of a driving method for an electronic paper display device provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of the movement of charged particles in another method for driving an electronic paper display device according to an embodiment of the present application;

FIG. 8 is a waveform diagram of a pre-charging phase and a charging phase of another driving method of an electronic paper display device provided by an embodiment of the present application;

FIG. 9 is a timing diagram of another driving method of an electronic paper display device according to an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Apparently, the described embodiments are some of the embodiments of the present application, but not all of them. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the described embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Unless otherwise defined, the technical terms or scientific terms used in the application shall have the ordinary meanings understood by those skilled in the art to which the application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

It should be noted that the size and shape of each figure in the drawings does not reflect the actual scale, and the purpose is only to illustrate the content of the application. And the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout.

An electronic paper display device provided by an embodiment of the present application, as shown in Fig. 1 and Fig. 2 , the electronic paper display device includes: a plurality of sub-pixel rows 9; the sub-pixel row 9 includes a plurality of sub-pixels 10; the sub-pixel 10: includes micro Structure 1, the first electrode 2 located on the display side of the microstructure 1 close to the electronic paper display device, the second electrode 3 located on the side of the microstructure 2 away from the display; the microstructure 1 includes: charged particles 4 of the first color, charged particles of the second color Particles 5 and charged particles 6 of the third color; the electric property of the charged particles 4 of the first color is opposite to that of the charged particles 5 of the second color, and the electric property of the charged particles 4 of the first color is opposite to that of the charged particles 6 of the third color Same; the charge-to-mass ratio of the charged particles 4 of the first color is greater than the charge-to-mass ratio of the charged particles 6 of the third color.

In some embodiments, as shown in FIG. 1 , the plurality of sub-pixel rows 9 extend along the first direction X and are arranged along the second direction Y. A plurality of sub-pixels 10 in each sub-pixel row 9 are arranged along the first direction X. The first direction X crosses the second direction Y. In FIG. 1 , the first direction X and the second direction Y are perpendicular to each other as an example for illustration. That is, a plurality of sub-pixels 10 in the electronic paper display device are arranged in an array. The multiple sub-pixels 10 in the electronic paper display device can also be divided into multiple sub-pixel columns, the multiple sub-pixel columns are arranged along the first direction X and extend along the second direction Y, and the multiple sub-pixels 10 in each sub-pixel column are arranged along the second direction Y. Arranged in direction Y.

In some embodiments, as shown in FIG. 1 , the electronic paper display device further includes: a plurality of scanning lines 11 and a plurality of data lines 12 intersecting horizontally and vertically, and a plurality of transistors 13 . A plurality of scan lines 11 and a plurality of data lines 12 divide regions of a plurality of sub-pixels 10 .

In some embodiments, as shown in FIG. 1 , the scan lines 11 correspond to the sub-pixel rows 10 one by one. The data lines are in one-to-one correspondence with the sub-pixel columns. The transistors 13 are in one-to-one correspondence with the sub-pixels 10 . The data lines are in one-to-one correspondence with the sub-pixel columns.

In a specific implementation, the control electrode of the transistor is electrically connected to the scanning signal line, the first electrode of the transistor is electrically connected to the data signal line, and the second electrode of the transistor is electrically connected to the second electrode. When the scanning signal input from the scanning signal line controls the transistor to be turned on, the driving signal of the data line data is provided to the second electrode through the transistor, so as to control the sub-pixel to display the required color.

In some embodiments, the transistors may be thin film transistors, for example.

In some embodiments, as shown in FIG. 2 , the electronic paper display device further includes a base substrate 7 and a cover plate 8 .

In some embodiments, the charged particles of the first color are black charged particles, the charged particles of the second color are white charged particles, and the charged particles of the third color are colored charged particles.

In some embodiments, the colored charged particles are red charged particles.

In some embodiments, as shown in FIG. 2 , the first electrodes 2 in the plurality of sub-pixels 10 may be integrally connected. That is, the first electrode is a planar electrode covering a plurality of sub-pixel regions. In this case, the voltage signals applied to the first electrodes are the same.

Of course, in some embodiments, the first electrodes in the multiple sub-pixels may also be disconnected. In this case, the voltage signals applied to the first electrodes in the multiple sub-pixels may be the same or different.

When the voltage signals applied to the first electrodes in the multiple sub-pixels are the same, the first electrodes may be grounded, that is, the voltage applied to the first electrodes is 0 volts (V).

In some embodiments, the charged particles of the first color and the charged particles of the third color are positively charged, and the charged particles of the second color are negatively charged. Of course, the charged particles of the first color and the charged particles of the third color may be negatively charged, and the charged particles of the second color may be positively charged.

An embodiment of the present application provides a driving method for an electronic paper display device. As shown in FIG. 3 , the driving method includes:

S101. According to the image to be displayed, in the precharging stage, apply a driving signal corresponding to the N-1th subpixel row to the second electrode in the Nth row of subpixel rows; wherein, N is an integer greater than 1;

S102. According to the image to be displayed, in the charging phase after the pre-charging phase, apply the driving signal corresponding to the sub-pixel row in the N-th row to the second electrode in the sub-pixel row in the N-th row; in the charging phase, the voltage value of the driving signal is not zero.

It should be noted that the pre-charging stage refers to the stage of charging the sub-pixels of the Nth row in advance, and the driving signal of the N-1th row of sub-pixels is charged to the Nth row of sub-pixels in the pre-charging stage.

The driving method of the electronic paper display device provided by the embodiment of the present application is provided with a pre-charging stage, so as to ensure the charging time of the sub-pixels, effectively charge the sub-pixels, and ensure that the second electrode in the sub-pixels reaches the correct voltage. Moreover, since the voltage value of the driving signal applied to the second electrode in the Nth row of subpixels in the charging stage after the precharging stage is not zero, even if the Nth row of subpixels in the precharging stage is written to the drive of the previous row of subpixels Signal, the driving signal whose voltage value is not zero will still drive the Nth row of sub-pixels to display their corresponding colors, preventing the Nth row of sub-pixels from displaying the color of the N-1th row of sub-pixels, thereby avoiding screen confusion and improving display effect and improve user experience.

In some embodiments, according to the image to be displayed, in the charging phase after the pre-charging phase, a driving signal corresponding to the N-th sub-pixel row is applied to the second electrode in the N-th sub-pixel row, specifically including:

When the sub-pixel displays the first color, the first driving signal is applied to the second electrode; as shown in Figure 4, the first driving signal T1 includes: the first level signal V1 applied in the charging phase; the first level The signal V1 is used to make the charged particles of the first color approach the display side of the electronic paper display device.

In some embodiments, according to the image to be displayed, in the charging phase after the pre-charging phase, applying a driving signal corresponding to the N-th sub-pixel row to the second electrode in the N-th sub-pixel row, further comprising:

In the case that the sub-pixel displays the second color, a second driving signal is applied to the second electrode; as shown in FIG. 4 , the second driving signal T2 includes: a second level signal V2 applied in the charging phase; a second level The signal V2 is used to make the charged particles of the second color approach the display side of the electronic paper display device.

In some embodiments, according to the image to be displayed, in the charging phase after the pre-charging phase, applying a driving signal corresponding to the N-th sub-pixel row to the second electrode in the N-th sub-pixel row, further comprising:

In the case that the sub-pixel displays the third color, the third driving signal is applied to the second electrode; as shown in Figure 4, the third driving signal T3 includes the third level signal V3 and the fourth level signal which are applied sequentially in the charging phase The signal V4; the third level signal V3 is used for: pulling the charged particles of the first color away from the display side; the fourth level signal V4 is used for: making the charged particles of the third color approach the display side of the electronic paper display device.

In some embodiments, as shown in FIG. 4 , the start time t1 of the charging phase is the same as the start time t1 of the third level signal V3, and the duration t2-t1 of the third level signal V3 is the same as the duration of the pre-charging phase. same.

It should be noted that the duration of the third level signal V3 in the charging phase can be called a balance phase, and this phase is used to balance the positions of the charged particles of the first color.

In some embodiments, as shown in FIG. 4 , in the writing phase, the third driving signal T3 includes a plurality of pulse units Z; the pulse unit Z includes a third level signal V3 and a fourth level signal V4 that are applied sequentially;

The start time t1 of the charging phase is the same as the start time t3 of the third level signal T3 in the first pulse unit Z, and the end time t3 of the charging phase is the same as the end time t3 of the fourth level signal V4 in the first pulse unit Z .

In some embodiments, as shown in FIG. 4, in the writing phase, the start time of the first level signal V1 in the first driving signal T1 is the same as the starting time t1 of the charging phase, and in the writing phase, the first driving signal The duration of the first level signal V1 in T1 is longer than the duration of the charging phase.

In some embodiments, as shown in FIG. 4 , in the writing phase, the start time of the second level signal V2 in the second driving signal T2 is the same as the starting time t1 of the charging phase, and in the writing phase, the second driving signal The duration of the second level signal V2 in T2 is longer than the duration of the charging phase.

In some embodiments, as shown in FIG. 4 , the duration of the first level signal V1 in the first driving signal T1 in the writing phase is equal to the duration of the second level signal V2 in the second driving signal T2 in the writing phase. duration, and the duration of the first level signal V1 in the first driving signal T1 in the writing phase is equal to the duration of the plurality of pulse units Z in the third driving signal T3 in the writing phase.

In some embodiments, the first level signal is electrically identical to the fourth level signal, and the absolute voltage value of the first level signal is greater than the absolute voltage value of the fourth level signal;

The electrical properties of the second level signal and the third level signal are opposite to those of the first level signal;

The absolute voltage value of the fourth level signal is smaller than the absolute voltage value of the third level signal;

The absolute voltage value of the second level signal is equal to the voltage absolute value of the third level signal.

In some embodiments, the charged particles of the first color and the charged particles of the third color are positively charged, the charged particles of the second color are negatively charged, the first level signal is 15 volts (V), the second level signal and the third color The flat signal is -15V, and the fourth level signal is 6V.

In some embodiments, the duration of the pre-charging phase is greater than or equal to 0.1H and less than or equal to 0.2H, wherein H is the duration of the charging phase. H=1/f/a, f is the refresh frequency, and a is the number of sub-pixel rows.

In some embodiments, as shown in FIG. 4 , in the writing phase, the first driving signal T1 further includes zero voltage signals before and after the first level signal V1 . In the writing phase, the second driving signal T2 also includes zero voltage signals before and after the second level signal V2. In the writing phase, the third driving signal T3 further includes: the fourth level signal and the third level signal sequentially applied by a plurality of pulse units Z, and a zero voltage signal.

It should be noted that, since the charged particles of the first color and the charged particles of the third color are electrically identical, when the fourth level signal is applied to the second electrode in the sub-pixel that needs to display the third color in the writing phase, the first color is charged. The particles also move toward the display side, so it is necessary to apply a third-level signal to the second electrode. Since the charge-to-mass ratio of the charged particles of the first color is greater than that of the charged particles of the third color, when the third level signal is applied to the second electrode, the moving speed of the charged particles of the first color is greater than that of the charged particles of the third color Speed, pulling the charged particles of the first color to move away from the display side can increase the distance between the charged particles of the first color and the charged particles of the third color, so as to prevent the screen of the third color from being biased towards the first color.

In some embodiments, the driving method also includes:

A scan signal is provided to the scan line to control the transistors in each sub-pixel row to be turned on row by row.

Next, the charged particles of the first color are black charged particles, the charged particles of the second color are white charged particles, and the charged particles of the third color are red charged particles as an example for illustration. Wherein, the charged particles of the first color and the charged particles of the third color are positively charged, and the charged particles of the second color are negatively charged. The display color of sub-pixels in the N-1 row is in the front, and the display color of the sub-pixels in the N-th row is in the back. The specific relationship between the sub-pixel colors in adjacent rows is as follows: black and red, white and red, black and white, red and white, Red and black, white and black.

Next, take the waveform diagram shown in Figure 4 as an example to illustrate the case where the colors of sub-pixels in adjacent rows are different:

1. Black and red situation:

The movement of charged particles is shown in Figure 5, and the actual waveforms of sub-pixels in the Nth row during the pre-charging phase and charging phase are shown in Figure 6;

According to the waveform diagrams corresponding to the black, white, and red screens shown in Figure 4, when the sub-pixels in the Nth row need to be displayed in red, the black and white waveforms have not yet been written, and the red charged particles in the Nth row of sub-pixels are pushed to the microstructure. The top of the display side, that is, the Nth row of sub-pixels is preferentially written in red. After the driving signal voltage of the sub-pixel row black screen in the N-1 row is 15V and the writing is started:

In the AB stage, due to the existence of pre-charging, in the Nth row of sub-pixels, the voltage of 15V pushes the black charged particles to the display side;

In the BC stage, the sub-pixels in the Nth row are written with a -15V voltage, which is used to balance the black charged particles and pull down the black charged particles to the position before the 15V voltage is written, and at the same time, the red charged particles will also be pulled down;

In the CD stage, the sub-pixels in row N are written with 6V voltage, which pushes red charged particles to the top of the microstructure, and the sub-pixels in row N finally display red.

2. White and red conditions: the movement of charged particles is shown in Figure 7, and the actual waveforms of the Nth row of sub-pixels during the pre-charging and charging phases are shown in Figure 8;

According to the waveform diagrams corresponding to the black, white, and red screens shown in Figure 4, when the sub-pixels in the Nth row need to be displayed in red, the black and white waveforms have not yet been written, and the red charged particles in the Nth row of sub-pixels are pushed to the microstructure. The top of the display side, that is, the Nth row of sub-pixels is preferentially written in red. After the driving signal voltage of the N-1 sub-pixel row white screen is -15V and the writing is started:

In the AB phase, due to the existence of pre-charging, in this row, the voltage of -15V pushes the white charged particles upward;

In the BC stage, the sub-pixels in the Nth row are written with -15V voltage, the white charged particles are pushed up, the black charged particles are pulled down, and the red charged particles are also pulled down;

In the CD stage, 6V voltage is written into the sub-pixels in the Nth row, the white charged particles are pulled down, and the red charged particles are pushed to the top of the microstructure, and the sub-pixels in the Nth row finally display red.

3. Black and white situation:

In the pre-charging stage, the sub-pixels in the Nth row write the first driving signal corresponding to the black picture, and when the sub-pixels in the Nth row actually write the second driving signal corresponding to the white picture in the charging stage, because the black charged particles are electrically opposite to the white charged particles , and the charge-to-mass ratio of the black charged particles is equivalent to that of the white charged particles, the second level signal in the charging stage drives the white charged particles to move to the display side and at the same time drives the black charged particles to move away from the display side, pre-charging has a great influence on the white screen writing Small, the Nth row of subpixels ends up displaying white.

4. Black and white situation:

In the pre-charging phase, the sub-pixels in the Nth row write the second driving signal corresponding to the white picture, and when the sub-pixels in the Nth row actually write the first driving signal corresponding to the black picture in the charging phase, because the black charged particles are electrically opposite to the white charged particles , and the charge-to-mass ratio of the black charged particles is equivalent to that of the white charged particles, the first level signal drives the black charged particles to move to the display side while driving the white charged particles to move away from the display side in the charging stage, the effect of pre-charging on the black screen writing Small enough that the Nth row of subpixels ends up displaying black.

5. Red and white situation:

In the pre-charging stage, the sub-pixels in the Nth row write the third driving signal corresponding to the red picture, and when the sub-pixels in the Nth row actually write the second driving signal corresponding to the white picture in the charging stage, because the red charged particles are electrically opposite to the white charged particles In the charging stage, the second level signal drives the white charged particles to move to the display side and at the same time drives the red charged particles to move away from the display side. The pre-charging has little effect on the writing of the white screen, and the sub-pixels in the Nth row finally display white.

6. Red and black conditions:

In the pre-charging stage, the sub-pixels in the Nth row write the third driving signal corresponding to the red picture, and when the sub-pixels in the Nth row of the charging stage actually write the second driving signal corresponding to the black picture, because the charge-to-mass ratio of the red charged particles is smaller than that of the black charged The charge-to-mass ratio of the particles, the black charged particles move faster, move to the display side, crowd out the red charged particles, and the sub-pixels in the Nth row finally display black.

It should be noted that the GATE signal in FIG. 6 and FIG. 8 is the scan signal input by the scan line. In FIG. 6 and FIG. 8, the transistor is turned on when the GATE signal is at a high level as an example for illustration.

In some embodiments, as shown in FIG. 9 , the first driving signal T1 , the second driving signal T2 and the third driving signal T3 further include: driving signals corresponding to the reverse phase and the shaking phase. The balance phase includes a first inversion phase and a second inversion phase, and the dithering phase includes a first dithering phase and a second dithering phase. In the first reverse phase, the first drive signal T1, the second drive signal T2 and the third drive signal T3 are used to: balance the charges of the charged particles of the first color and the charged particles of the second color, and prevent the charged particles of the first color from Color charged particles polarized. In the second reverse phase, the first driving signal T1 , the second driving signal T2 and the third driving signal T3 are used to balance the charges of the charged particles of the third color. In the first shaking stage, the first driving signal T1, the second driving signal T2, and the third driving signal T3 include positive pressure signals and negative pressure signals applied alternately at a slow speed, for: charging the charged particles of the first color and the second color Particles separate. In the second shaking stage, the first driving signal T1, the second driving signal T2, and the third driving signal T3 include fast and alternately applied positive pressure signals and negative pressure signals, which are used to: make the charged particles of the third color and the charged particles of the first color separate.

An electronic paper display device provided in an embodiment of the present application, the electronic paper display device includes: a plurality of sub-pixel rows; the sub-pixel row includes a plurality of sub-pixels; the sub-pixel: includes a microstructure, located on the display side of the microstructure close to the electronic paper display device The first electrode, the second electrode on the side away from the display of the microstructure; the microstructure includes: charged particles of the first color, charged particles of the second color, and charged particles of the third color. The electronic paper display device also includes: a processor; the processor is used for The embodiment of the present application provides a driving method for driving an electronic paper display device.

In some embodiments, the first color charged particles are black charged particles, the second color charged particles are white charged particles, and the third color charged particles are red charged particles.

The display device provided in the embodiment of the present application is any product or component with a display function, such as a tablet reader. The other essential components of the electronic paper display device should be understood by those of ordinary skill in the art, and will not be repeated here, nor should they be used as limitations on the present application. For the implementation of the electronic paper display device, reference may be made to the above-mentioned embodiment of the driving method of the electronic paper display device, and repeated descriptions will not be repeated.

To sum up, the electronic paper display device and its driving method provided by the embodiments of the present application are provided with a pre-charging stage, so that the charging time of the sub-pixels can be guaranteed, and the sub-pixels can be effectively charged to ensure that the second electrode in the sub-pixels to the correct voltage. Moreover, since the voltage value of the driving signal applied to the second electrode in the Nth row of subpixels in the charging stage after the precharging stage is not zero, even if the Nth row of subpixels in the precharging stage is written to the drive of the previous row of subpixels Signal, the driving signal whose voltage value is not zero will still drive the Nth row of sub-pixels to display their corresponding colors, preventing the Nth row of sub-pixels from displaying the color of the N-1th row of sub-pixels, thereby avoiding screen confusion and improving display effects and improve user experience.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (10)

1. A driving method of an electronic paper display device, the electronic paper display device comprising: a plurality of rows of subpixels; the subpixel row comprises a plurality of subpixels; the sub-pixel: the electronic paper display device comprises a microstructure, a first electrode and a second electrode, wherein the first electrode is positioned on the display side of the microstructure, which is close to the electronic paper display device, and the second electrode is positioned on the microstructure, which is far away from the display side; the microstructure includes: first, second, and third color charged particles; characterized in that the method comprises:

according to an image to be displayed, in a pre-charging stage, applying a driving signal corresponding to the sub-pixel row of the (N-1) th row to the second electrode in the sub-pixel row of the Nth row; wherein N is an integer greater than 1;

according to an image to be displayed, in a charging stage after the pre-charging stage, applying a driving signal corresponding to the sub-pixel row in the Nth row to the second electrode in the sub-pixel row in the Nth row; the voltage value of the driving signal is not zero during the charging phase.

2. The method according to claim 1, wherein, according to the image to be displayed, in a charging phase after the pre-charging phase, applying the driving signal corresponding to the sub-pixel row in the nth row to the second electrode in the nth row of sub-pixel rows specifically comprises:

applying a first drive signal to the second electrode in a case where the sub-pixel displays a first color; the first drive signal includes: a first level signal applied during the charging phase; the first level signal is used for: bringing the first color charged particles close to a display side of the electronic paper display device.

3. The method according to claim 2, wherein the driving signal corresponding to the nth row of sub-pixel rows is applied to the second electrode in the nth row of sub-pixel rows in a charging phase after the pre-charging phase according to the image to be displayed, further comprising:

applying a second drive signal to the second electrode in a case where the sub-pixel displays a second color; the second drive signal includes: a second level signal applied during the charging phase; the second level signal is used for: bringing the second color charged particles close to a display side of the electronic paper display device.

4. The method of claim 3, wherein the driving signals corresponding to the N row of sub-pixel rows are applied to the second electrodes in the N row of sub-pixel rows in a charging phase after the pre-charging phase according to the image to be displayed, further comprising:

in the case where the sub-pixel displays a third color, applying a third driving signal to the second electrode; the third driving signal comprises a third level signal and a fourth level signal which are sequentially applied in a charging stage; the third level signal is used for: pulling the first color charged particles away from the display side; the fourth level signal is used for: bringing the third color charged particles close to a display side of the electronic paper display device.

5. The method of claim 4, wherein the start of the charging phase is the same as the start of the third level signal, and wherein the duration of the third level signal is the same as the duration of the pre-charging phase.

6. The method of claim 5, wherein the third driving signal comprises a plurality of pulse units during a write phase; the pulse unit comprises the third level signal and the fourth level signal which are applied in sequence;

the starting time of the charging phase is the same as the starting time of the third level signal in the first pulse unit, and the ending time of the charging phase is the same as the ending time of the fourth level signal in the first pulse unit.

7. The method of claim 4, wherein the first level signal and the fourth level signal are electrically the same, and the absolute voltage of the first level signal is greater than the absolute voltage of the fourth level signal;

the electrical property of the second level signal and the electrical property of the third level signal are opposite to the electrical property of the first level signal;

the voltage absolute value of the fourth level signal is smaller than that of the third level signal;

the voltage absolute value of the second level signal is equal to the voltage absolute value of the third level signal.

8. The method of any one of claims 1-7, wherein the duration of the pre-charge phase is greater than or equal to 0.1H and less than or equal to 0.2H, where H is the duration of the charge phase.

9. An electronic paper display device, comprising: a plurality of sub-pixel rows; the subpixel row comprises a plurality of subpixels; the sub-pixel: the electronic paper display device comprises a microstructure, a first electrode and a second electrode, wherein the first electrode is positioned on the display side of the microstructure, which is close to the electronic paper display device, and the second electrode is positioned on the microstructure, which is far away from the display side; the microstructure includes: first, second, and third color charged particles; characterized in that, the electronic paper display device still includes: a processor; the processor is configured to drive the electronic paper display device using the method of any one of claims 1 to 8.

10. The electronic paper display device according to claim 9, wherein the first color charged particles are black charged particles, the second color charged particles are white charged particles, and the third color charged particles are red charged particles.

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