TW201409445A - Electronic paper display device, display device and driving method thereof - Google Patents

Abstract

The present disclosure relates to a display device. The display device receives image data from an image system. The display device includes a display panel, a data driving circuit, and a common voltage generating circuit. The display device includes a common electrode and a plurality of pixel electrodes. The data driving circuit provides a first data voltage representative of the image data to the plurality of pixel electrodes. The common voltage generating circuit provides a first common voltage to the common electrode, to drive the display panel to display a video image corresponding to the image data. The data driving circuit provides a second data voltage to the plurality of pixel electrodes before the display device displays a next video image which differs from a former video image. The common voltage generating circuit provides a second voltage to the common electrode. An absolute value of a difference between the second common voltage and the second data voltage is more than an absolute value of difference between the first common voltage and the second data voltage, to drive the display panel to display a transition image which has a predetermined gray scale for clearing the former video image.

Description

Electronic paper display device, display device and driving method thereof

The present invention relates to a display device and a driving method thereof, and more particularly to an electronic paper display device and a driving method thereof.

Display devices, such as electronic paper display devices, have become more and more popular and become mainstream electronic products for the public to read information due to their advantages of flexibility, low power consumption, and high contrast. Electronic paper display devices typically include components such as a memory unit, a control unit, a drive unit, and an electronic paper display panel. The control unit is electrically connected to the memory unit and the drive unit. The drive unit is further electrically connected to the electronic paper display panel.

When the picture of the electronic paper display device needs to be updated, the control unit directly compares the old picture with the new picture, and queries the output waveform table existing in the memory unit according to the comparison result to control the output of the driving unit. The desired waveform is applied to the electronic paper display panel to obtain the desired new picture.

Assume that the 16 grayscale system is taken as an example. Since there are 16 possibilities for the grayscale of the old screen, there are 16 possibilities for the grayscale of the new screen. Therefore, there will be 16×16=256 possible changes from the old screen to the new screen. Combination, that is, 256 drive waveforms are required. Correspondingly, when the electronic paper display device performs screen update, the color particles in the electronic paper display panel need to be driven by several screens to migrate from the current position to the position corresponding to the target gray scale. It can be seen that the electronic paper display device using the above driving method takes a long time to update the screen.

In view of this, it is necessary to provide a display device with a fast picture update speed.

In view of the above, it is necessary to provide an electronic paper display device with a fast screen update speed.

In view of the above, it is necessary to provide a driving method of a display device having a faster picture update speed.

The present invention provides an electronic paper display device that receives image data output by an image system and displays a corresponding image according to the received image data. The electronic paper display device includes:

An electronic paper display panel comprising a common electrode and a plurality of pixel electrodes;

a data driving circuit for providing a data voltage to the plurality of pixel electrodes;

a common voltage generating circuit for supplying a common voltage to the common electrode;

The data driving circuit provides a first data voltage corresponding to the image data to the plurality of pixel electrodes, and correspondingly, the common voltage generating circuit provides a first common voltage to the common electrode to display the electronic paper The panel displays an image frame corresponding to the image data; the data driving circuit provides a second data voltage to the plurality of pixel electrodes before displaying the image image different from the previous image frame, and correspondingly, the common voltage generating circuit provides a second common voltage to the common electrode, an absolute value of a difference between the second common voltage and the second data voltage being greater than an absolute value of a difference between the first common voltage and the second data voltage, so that the electronic paper display device A transition screen of a predetermined gray scale is displayed to erase the previous image frame.

The present invention provides a display device that receives image data output by an image system and displays a corresponding image according to the received image data. The display device includes:

a display panel including a common electrode and a plurality of pixel electrodes;

a data driving circuit for providing a data voltage to the plurality of pixel electrodes;

a common voltage generating circuit for supplying a common voltage to the common electrode;

The data driving circuit provides a first data voltage corresponding to the image data to the plurality of pixel electrodes, and correspondingly, the common voltage generating circuit provides a first common voltage to the common electrode to display the display panel An image frame corresponding to the image data; the data driving circuit provides a second data voltage to the plurality of pixel electrodes before displaying the image image different from the previous image frame, and correspondingly, the common voltage generating circuit provides the second image a common voltage to the common electrode, an absolute value of a difference between the second common voltage and the second data voltage being greater than an absolute value of a difference between the first common voltage and the second data voltage, so that the display device displays a predetermined gray scale The transition screen is used to erase the previous image frame.

The present invention provides a driving method of a display device, wherein the display device includes a common electrode and a plurality of pixel electrodes, and the driving method includes:

Providing an image data to the display device;

Providing a first data voltage corresponding to the image data to the plurality of pixel electrodes, and correspondingly, providing a first common voltage to the common electrode, so that the display device displays an image image corresponding to the image data;

Providing a second data voltage to the plurality of pixel electrodes before displaying an image image different from the previous image frame, correspondingly providing a second common voltage to the common electrode, the second common voltage and the second data The absolute value of the difference between the voltages is greater than the absolute value of the difference between the first common voltage and the second data voltage, so that the display device displays a transition screen of a predetermined gray level to erase the previous image frame.

Compared with the electronic paper display device of the prior art, the electronic paper display device of the present invention and the driving method thereof provide the second common voltage to the common electrode, and the absolute value of the difference between the second common voltage and the second data voltage An absolute value greater than a difference between the first common voltage and the second data voltage to cause the electronic paper display device to display a transition screen of a predetermined gray level. Since the clamping voltage of the common electrode and each of the pixel electrodes is large when the electronic paper display device displays the transition screen of the predetermined gray scale, the moving speed of the display medium layer is faster, thereby reducing the previous erasure. The time of the image screen. Similarly, the display device of the present invention and the driving method thereof can also reduce the time for erasing the previous image frame.

The invention will be further described in detail below with reference to the accompanying drawings. This embodiment is described by taking an electronic paper display device and a driving method thereof as an example, and the present invention is also applicable to other suitable types of display devices.

Please refer to FIG. 1 and FIG. 2 together. FIG. 1 is a schematic block diagram of the electronic paper display device of the embodiment. 2 is a partial cross-sectional structural view of the electronic paper display device of the embodiment. The electronic paper display device 1 includes an electronic paper display panel 10, a timing control circuit 12, a scan driving circuit 14, a data driving circuit 16, and a common voltage generating circuit 18. The timing control circuit 12 is connected to the scan driving circuit 14, the data driving circuit 16, and the common voltage generating circuit 18, respectively. The timing control circuit 12 receives the image data of an image system 2, and generates corresponding data signals and control signals according to the image data. The scan driving circuit 14 provides a corresponding scan signal to the electronic paper display panel 10 according to the control signal. The data driving circuit 16 provides a corresponding data voltage to the electronic paper display panel 10 according to the data signal. The common voltage generating circuit 18 provides a corresponding common voltage to the electronic paper display panel 10 according to the control signal.

The electronic paper display panel 10 includes a plurality of mutually parallel scan lines 102, a plurality of data lines 104 that are parallel to each other and insulated from the plurality of scan lines 102, and a plurality of data lines 104 at the intersection of the scan lines 102 and the data lines 104. The switch 106, the plurality of pixel electrodes 108, the common electrode 110, and the display medium layer 112 (see FIG. 2) sandwiched between the plurality of pixel electrodes 108 and the common electrode 110. The display medium layer 112 is bonded between the common electrode 110 and the plurality of pixel electrodes 108 by an adhesive. In the present embodiment, the display medium layer 112 is a bistable electrophoretic display medium layer, and the medium layer is displayed by microcapsule electrophoresis. The electrophoretic display medium layer 112 includes a plurality of microcapsules 112a, each of which encapsulates a plurality of first electrophoretic particles 112b, a plurality of second electrophoretic particles 112c, and a transparent liquid (not labeled). The plurality of first electrophoretic particles 112b and the plurality of second electrophoretic particles 112c have different electrical and optical characteristics. The first electrophoretic particles 112b and the second electrophoretic particles 112c are directionalally moved in the microcapsules 112a according to a voltage applied between the pixel electrodes 108 and the common electrode 110, and the first electrophoresis is controlled by controlling the direction of the electric field. The moving direction of the particles 112b and the second electrophoretic particles 112c further controls the content displayed by the electronic paper display device 1. It should be noted that the display medium layer 112 of the present invention may adopt other structures. For example, if the liquid in the microcapsule 112a is a black liquid, only white particles may be disposed in the microcapsule 112a.

The switch 106 includes a control end 106a, a first conductive end 106b, and a second conductive end 106c. Preferably, the switch 106 is a thin film transistor (TFT), the control terminal 106a is a gate, the first conductive end 106b is a source, and the second conductive end 106c is a drain. The control terminal 106a is connected to the scan driving circuit 14 by the scan line 102. The first conductive terminal 106b is connected to the data driving circuit 16 by a corresponding data line 104. The second conductive terminal 106c is connected to the The pixel electrode 108. The common electrode 110 is connected to the common voltage generating circuit 18.

Each pixel electrode 108 and the common electrode 110 define a display unit 20. In the present embodiment, the electronic paper display device 1 adopts a single dot inversion driving mode, that is, the screen color displayed by each display unit 20 is different from the screen color displayed by the display unit 20 adjacent thereto. Please refer to FIG. 3. FIG. 3 is a schematic diagram showing the arrangement of the display unit 20 of the electronic paper display panel 10. According to the driving method adopted by the electronic paper in the present embodiment, the display unit 20 is divided into the first display group 201 and the second display group 203 by the odd column and the even column. The first display group 201 is composed of an odd-numbered display unit 20, and the second display group 203 is composed of an even-numbered display unit 20. Optionally, the first display group 201 may also be composed of an odd-numbered display unit 20, and the second display group 203 may also be composed of an even-numbered display unit 20. In addition, it is conceivable that in other modified embodiments, when the electronic paper display device 1 adopts other driving modes, the multi-column display unit 20 on the electronic paper display panel 10 may be divided in other manners, and may also be divided into three. Even multiple display groups.

Please refer to FIG. 4. FIG. 4 is a schematic diagram of driving waveforms of the electronic paper display device 1 and corresponding display screens. Specifically, V1 and V2 shown in FIG. 4 are two common voltages corresponding to the common voltage generating circuit 18 applied to the common electrode 110, which are defined as a first common voltage and a second common voltage, respectively. D1 and D2 are the first data voltage and the second data voltage applied to the data line 104 by the data driving circuit 16. G _{1 -} G _2n are scanning signals applied to the plurality of scanning lines 102 by the scan driving circuit 14.

The driving principle of the electronic paper display device 1 is as follows:

The electronic paper display device 1 receives the image data output by the image system 2, and displays a corresponding image based on the received image data. The data driving circuit 16 provides a first data voltage D1 corresponding to the image data to the plurality of pixel electrodes 108. Correspondingly, the common voltage generating circuit 18 supplies the first common voltage V1 to the common electrode 110, so that The electronic paper display panel 10 displays an image frame corresponding to the image data; the data driving circuit 16 provides the second data voltage D2 to the plurality of electronic image display devices 1 before displaying the image image different from the previous image frame The pixel electrode 108, correspondingly, the common voltage generating circuit 18 provides a second common voltage V2 to the common electrode 110, and the absolute value of the difference between the second common voltage V2 and the second data voltage D2 is greater than the first common voltage The absolute value of the difference between V1 and the second data voltage D2 is such that the electronic paper display device 1 displays a transition screen of a predetermined gray level to erase the previous image frame.

The transition picture of the predetermined gray level includes at least one transition screen of a single gray level. In addition, the transition picture of the single gray level may further be a transition picture of a single color. In this embodiment, the transition picture of the at least one single gray level comprises a transition picture of a single color of two different colors. The grayscales of the transition pictures of the single color of the two different colors are the same. In other modified embodiments, the grayscales of the transition pictures of the single color of two different colors are different. Further, in this embodiment, the transition screens of the single colors of different colors are respectively a black transition screen and a white transition screen. The second common voltage V2 applied to the common electrode 110 by the common voltage generating circuit 18 is a constant voltage for any single color transition picture. Correspondingly, for any single color transition picture, the second data voltage D2 applied by the data driving circuit 16 to the plurality of pixel electrodes 108 is the same. In addition, the common voltage generating circuit 18 applies the same first common voltage V1 to the common electrode, and drives the electronic paper display panel 10 to display each image frame. The first common voltage V1 is a constant voltage.

Specifically, the four transition screens are inserted in the two adjacent and different image frames 31 and 32, and the four transition screens are sequentially a full black transition screen 33, two checkerboard transition screens 34, 35, and an all white. The transition screen 36 (see FIG. 4) is taken as an example to explain the driving principle of the electronic paper display device 1. The checkerboard transition screens 34 and 35 are screens in which the screen color displayed by any of the display units 20 is different from the screen color displayed by the adjacent display unit 20. In other modified embodiments, it is also possible to select only a plurality of transition pictures, such as one or two transition pictures, between the two image frames 31 and 32. In addition, the checkerboard transition screen may also be another transition screen including two or more different colors.

When the electronic paper display device 1 is updated from the display image screen 31 to the image screen 32, the timing control circuit 12 generates a corresponding black transition screen based on the image data corresponding to the image frame 32 received from the image system 2. 33. The two checkerboard transition screens 34, 35, the all white transition screen 36, and the data signals of the image screen 32, and corresponding control signals. Specifically, the data signal includes a first data signal and a second data signal, wherein the first data signal corresponds to the image frame 32, and the second data signal corresponds to the all black transition screen 33, the two checkerboard transition screen 34, 35. And the all white transition screen 36. The control signal includes a first voltage control signal, a second voltage control signal, a first scan control signal, and a second scan control signal.

First, the timing control circuit 12 outputs a second data signal corresponding to the all-black transition picture 33 to the data driving circuit 16, outputs a first scan control signal to the scan driving circuit 14, and outputs a second voltage control signal to the public Voltage generating circuit 18. The scan driving circuit 14 sequentially applies the scan signals G ₁ -G _2n to the column display units 20 on the electronic paper display panel 10 according to the received first scan control signal to sequentially activate the connection with the respective scan lines 102. Display unit 20. The data driving circuit 16 generates a second data voltage D2 corresponding to the received second data signal, and outputs the second data voltage D2 to the activated pixel electrodes 108 of each of the activated display units 20 by the plurality of data lines 104. . The common voltage generating circuit 18 generates a second common voltage V2 according to the received second voltage control signal, and provides the second common voltage V2 to the common electrode 110. The second data voltage D2 is greater than the second common voltage V2. The absolute value of the difference between the second common voltage V2 and the second data voltage D2 is greater than the absolute value of the difference between the first common voltage V1 and the second data voltage D2. Thus, the electronic paper display panel 10 displays a single grayscale full black transition picture.

Second, the timing control circuit 12 outputs two different second data signals corresponding to the checkerboard transition screen 34 to the data driving circuit 16, outputs a second scan control signal to the scan driving circuit 14, and outputs a first voltage control. The signal is sent to the common voltage generating circuit 18. The scan driving circuit 14 simultaneously outputs the scan signals G ₁ , G ₃ , . . . , G _2n-1 to the column display units 20 in the first display group 201 according to the received second scan control signal, and then The scanning signals G ₂ , G ₄ , . . . , G _{2n are} simultaneously output to the respective column display units 20 in the second display group 203. The common voltage generating circuit 18 generates a first common voltage V1 according to the received first voltage control signal, and provides the first common voltage V1 to the common electrode 110. Optionally, the scan driving circuit 14 can also output the scan signals G ₂ , G ₄ , . . . , G _2n to the respective columns in the second display group 203 according to the received second scan control signal. The unit 20 then simultaneously outputs the scanning signals G ₁ , G ₃ , . . . , G _2n-1 to the column display units 20 in the first display group 201. The data driving circuit 16 generates two different second data voltages D2 according to the received second data signals, and outputs the two different second data voltages D2 to the plurality of data lines 104. Specifically, the data driving circuit 16 outputs the same to the second data voltage D2 on the same row display unit 20 in the first display group 201, and outputs the same to the same row display unit 20 in the second display group 203. The second data voltage D2 is also the same. For the same display unit 20 in the first display group 201 and the second display group 203, the second data voltage output by the data driving circuit 16 is different, and the second The difference between a second data voltage D2 and the first common voltage V1 of the second data voltage D2 is greater than 0, and the difference between the other second data voltage D2 and the first common voltage V1 is less than zero. That is, the color of the screen displayed by the first display group 201 and the same row display unit 20 in the second display group 203 is different. Thus, the electronic paper display panel 10 displays a checkerboard transition screen. In this embodiment, the first common voltage V1 is a constant voltage, and the absolute values of the difference between the two different second data voltages D2 and the first common voltage V1 are the same.

Third, the checkerboard transition screen 35 is substantially the same as the masterboard transition screen 34, and the main difference is that the second data voltage D2 applied to the same display unit 20 by the data driving circuit 16 is different, and wherein The electric field formed by the second data voltage D2 and the first common voltage V1 is positive, and the electric field formed by the second data voltage D2 and the first common voltage V1 is negative. In other words, the screen color displayed by each display unit 20 on the checkerboard transition screen 35 is different from the screen color displayed by the same display unit 20 on the checkerboard transition screen 34, for example, the checkerboard transition screen. The screen color displayed by a display unit 20 on the screen 35 is white, and the screen color displayed by the same display unit 20 on the checkerboard transition screen 34 is black. The driving manner of the checkerboard transition screen 35 will not be described here.

Fourth, the all-white transition picture 36 is substantially the same as the driving mode of the all-black transition picture 33. The main difference between the two is: first, for the black-and-white transition pictures 33, 36 of the single color of the two colors, the common voltage is generated. The circuit 18 is different in correspondence with the second common voltage V2 applied to the common electrode 110, respectively. In this embodiment, the common voltage generating circuit 18 applies two different second common voltages V2 to the common electrode 110 to correspondingly drive the electronic paper display panel 10 to display a transition screen 33 of a single color different in color and color. 36. The difference between the second common voltage V2 of the two different second common voltages V2 and the first common voltage V1 is greater than 0, and the difference between the other second common voltage V2 and the first common voltage V1 is less than 0.

Further, for the black and white transition pictures 33 and 36 of the single color of the two colors different, the second data voltage D2 applied to the plurality of pixel electrodes 108 by the data driving circuit 16 is different. The manner of driving the all-white transition screen 36 will not be described here.

Fifth, after all the four transition screens are displayed, the timing control circuit 12 starts outputting the first data signal corresponding to the image frame 32 to the data driving circuit 16, and outputs the first scan control signal to the scan driving circuit 14. And outputting the first voltage control signal to the common voltage generating circuit 18. The scan driving circuit 14 sequentially applies scan signals to the column display units 20 on the electronic paper display panel 10 according to the first scan control signals. The data driving circuit 16 generates a first data voltage D1 according to the first data signal and outputs the first data voltage D1 to the plurality of pixel electrodes 108. The common voltage generating circuit 18 provides the first common voltage V1 to the common electrode 110 according to the first voltage control signal. Therefore, the electronic paper display panel 10 displays an image screen corresponding to the image data.

It can be seen from the above that the electronic paper display device 1 provides the second common voltage V2 to the common electrode 110, and the absolute value of the difference between the second common voltage V2 and the second data voltage D2 is greater than the first common voltage V1. The absolute value of the difference between the second data voltages D2 is such that the electronic paper display device 1 displays a transition screen of a predetermined gray scale. Since the nip between the common electrode 110 and each of the pixel electrodes 108 is large when the electronic paper display device 1 displays the transition screen of the predetermined gray scale, the plurality of first electrophoretic particles 112b and the plurality of The two electrophoretic particles 112c move faster, thereby reducing the time for erasing the previous image frame.

Next, when the electronic paper displays a transition screen including two different colors, the scan driving circuit 14 selects to simultaneously activate each display in a display group of the first display group 201 and the second display group 203. The unit 20, the data driving circuit 16 simultaneously applies the output second data voltage D2 to the pixel electrodes 108 of each display unit 20 that are simultaneously activated, and the second data applied to the display unit 20 of the same row. The voltage D2 is the same. The scan driving circuit 14 then simultaneously activates each display unit 20 in another display group, and the second data voltage D2 outputted by the data driving circuit 16 is simultaneously applied to each display unit 20 that is simultaneously activated. The second data voltage D2 applied to the display unit 20 of the same row on the pixel electrode 108 is the same, and is applied to the same display unit 20 of the first display group 201 and the second display group 203. The second data voltage D2 is different, and one of the two differences formed by the first common voltage V1 is greater than 0, and the other difference is less than zero. It can be seen that the time of the checkerboard transition screens 34 and 35 displayed by the electronic paper display device 1 of the present invention is compared with the driving mode in which the scanning signal is sequentially applied to the display units of the columns in the previous electronic paper display device. It is shorter, thereby further reducing the time for erasing the image frame 31.

Please refer to FIG. 5. FIG. 5 is a flow chart of a driving method of the electronic paper display device. The electronic display device includes a common electrode, a plurality of pixel electrodes, and a display medium layer sandwiched between the plurality of pixel electrodes and the common electrode, and the driving method includes:

Step S1: providing an image data to the electronic paper display device.

Step S2: providing a first data voltage corresponding to the image data to the plurality of pixel electrodes, and correspondingly, providing a first common voltage to the common electrode, so that the electronic paper display device displays a corresponding image data. Image screen.

In this embodiment, the same first common voltage is supplied to the common electrode, and the electronic paper display device is driven to display each image frame. The first common voltage is a constant voltage.

Step S3: Before displaying the image frame different from the previous image frame, providing a second data voltage to the plurality of pixel electrodes, correspondingly providing a second common voltage to the common electrode, the second common voltage and the The absolute value of the difference between the second data voltages is greater than the absolute value of the difference between the first common voltage and the second data voltage, so that the electronic paper display device displays a transition screen of a predetermined gray level to erase the previous image frame.

The transition picture of the predetermined gray level includes at least one transition screen of a single gray level. In addition, the transition picture of the single gray level may further be a transition picture of a single color. In this embodiment, the transition picture of the at least one single gray level comprises a transition picture of a single color of two different colors. The grayscales of the transition pictures of the single color of the two different colors are the same. In other modified embodiments, the grayscales of the transition pictures of the single color of two different colors are different. Further, in this embodiment, the transition screens of the single colors of different colors are respectively a black transition screen and a white transition screen.

Further, in step S3, for the transition picture of the single color of the two colors different, the driving method is different according to the second common voltage respectively supplied to the common electrode. In this embodiment, two different second common voltages are provided to the common electrode to correspondingly drive the electronic paper display device to display a transition picture of the single color different in the two colors. The difference between the second common voltage of the two different second common voltages and the first common voltage is greater than 0, and the difference between the other second common voltage and the first common voltage is less than zero. Further, the second data voltages supplied to the plurality of pixel electrodes are different.

In addition, for any single color transition picture, the second common voltage supplied to the common electrode is a constant voltage. Correspondingly, the second data voltages supplied to the plurality of pixel electrodes are the same.

The driving method further includes a step S4 of further providing the first common voltage to the common electrode between at least two adjacent and different image frames, and correspondingly providing different second data voltages to the corresponding pixel electrodes And driving the electronic paper display device to display at least one transition picture including two different colors.

Specifically, the at least one transition picture including two different colors is located between the transition pictures of the single color of the two different colors.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

1. . . Electronic paper display device

2. . . Image system

10. . . Electronic paper display panel

12. . . Timing control circuit

14. . . Scan drive circuit

16. . . Data drive circuit

18. . . Common voltage generating circuit

20. . . Display unit

31, 32. . . Image screen

33. . . All black transition screen

34, 35. . . Checkerboard transition screen

36. . . Full white transition screen

102. . . Scanning line

104. . . Data line

106. . . switch

108. . . Pixel electrode

110. . . Common electrode

112. . . Display media layer

112a. . . Microcapsules

112b. . . First electrophoretic particle

112c. . . Second electrophoretic particle

106a. . . Control terminal

106b. . . First conduction end

106c. . . Second conduction end

201. . . First display module

203. . . Second display module

1 is a schematic block diagram showing the structure of an electronic paper display device of the present invention.

2 is a partial cross-sectional structural view of an electronic paper display panel of the electronic paper display device shown in FIG. 1.

3 is a schematic view showing the arrangement of display units of the electronic paper display panel of the electronic paper display device shown in FIG. 1.

4 is a schematic view showing driving waveforms of the electronic paper display device shown in FIG. 1 and corresponding display screens.

Fig. 5 is a flow chart showing a driving method of the electronic paper display device shown in Fig. 1.

31, 32. . . Image screen

33. . . All black transition screen

34, 35. . . Checkerboard transition screen

36. . . Full white transition screen

Claims (50)

An electronic paper display device that receives image data output by an image system and displays a corresponding image according to the received image data, the electronic paper display device comprising:
An electronic paper display panel comprising a common electrode and a plurality of pixel electrodes;
a data driving circuit for providing a data voltage to the plurality of pixel electrodes;
a common voltage generating circuit for supplying a common voltage to the common electrode;
The data driving circuit provides a first data voltage corresponding to the image data to the plurality of pixel electrodes, and correspondingly, the common voltage generating circuit provides a first common voltage to the common electrode to display the electronic paper The panel displays an image frame corresponding to the image data; the data driving circuit provides a second data voltage to the plurality of pixel electrodes before the electronic paper display panel displays an image image different from the previous image frame, correspondingly, the The common voltage generating circuit provides a second common voltage to the common electrode, and an absolute value of a difference between the second common voltage and the second data voltage is greater than an absolute value of a difference between the first common voltage and the second data voltage, so that The electronic paper display device displays a transition screen of a predetermined gray scale to erase the previous image frame. The electronic paper display device of claim 1, wherein the predetermined grayscale transition screen comprises at least one single grayscale transition screen. The electronic paper display device of claim 2, wherein the transition screen of the predetermined gray scale is a transition screen of a single gray scale. The electronic paper display device of claim 2, wherein the transition screen of the single gray scale is further a transition screen of a single color. The electronic paper display device of claim 2, wherein the transition screen of the at least one single gray scale comprises a transition screen of a single color of two different colors. The electronic paper display device of claim 5, wherein the grayscale of the transition screen of the single color of the two colors is different. The electronic paper display device of claim 5, wherein the transition screen of the single color of the two colors is the same. The electronic paper display device of claim 5, wherein the transition screens of the single colors of the two colors are respectively a black transition screen and a white transition screen. The electronic paper display device of claim 5, wherein the common voltage generating circuit is different from the second common voltage respectively applied to the common electrode for the transition screen of the single color of the two colors. The electronic paper display device of claim 9, wherein the common voltage generating circuit applies two different second common voltages to the common electrode to drive the electronic paper display panel to display the two colors differently. A single color transition screen. The electronic paper display device of claim 10, wherein one of the two different second common voltages has a difference between the second common voltage and the first common voltage greater than 0, and the other second common voltage The difference from the first common voltage is less than zero. The electronic paper display device of claim 11, wherein the second common voltage applied to the common electrode by the common voltage generating circuit is a constant voltage for any single color transition screen. The electronic paper display device of claim 12, wherein the second data voltage applied to the plurality of pixel electrodes by the data driving circuit is the same for any one color transition screen. The electronic paper display device of claim 13, wherein the second data voltage applied to the plurality of pixel electrodes by the data driving circuit is different for the transition screen of the single color of the two colors. The electronic paper display device of claim 14, wherein the common voltage generating circuit applies the same first common voltage to the common electrode, and drives the electronic paper display panel to display each image frame. The electronic paper display device of claim 15, wherein the first common voltage is a constant voltage. The electronic paper display device according to any one of claims 1 to 16, wherein the electronic paper display device further comprises a timing control circuit, the timing control circuit receives the image data output by the image system, and Generating corresponding data signals and control signals according to the received image data, and the data driving circuit provides corresponding data voltages to the plurality of pixel electrodes according to the data signals, and the common voltage generating circuit provides corresponding signals according to the control signals. The common voltage to the common electrode. The electronic paper display device of claim 17, wherein the data signal comprises a first data signal and a second data signal, and the timing control circuit provides the first data when the electronic paper display device displays the image image Signaling to the data driving circuit, the data driving circuit generates the first data voltage according to the first data signal, and provides the first data voltage to the plurality of pixel electrodes; when the electronic paper display device displays a predetermined gray level The timing control circuit provides a second data signal to the data driving circuit, and the data driving circuit generates the second data voltage according to the second data signal, and provides the second data voltage to the plurality of pictures Prime electrode. The electronic paper display device of claim 18, wherein the control signal comprises a first voltage control signal and a second voltage control signal, and when the electronic paper display device displays an image frame, the timing control circuit provides the a first voltage control signal to the common voltage generating circuit, the common voltage generating circuit correspondingly providing the first common voltage to the common electrode under the control of the first voltage control signal; when the electronic paper display device displays a single color and a single The timing control circuit provides a second voltage control signal to the common voltage generating circuit, and the common voltage generating circuit correspondingly supplies the second common voltage to the common electrode under the control of the second voltage control signal . The electronic paper display device of claim 19, wherein, for a transition screen of a single color of two different colors, the timing control circuit provides two different second voltage control signals to the common voltage generating circuit, so that The common voltage generating circuit respectively applies the different second common voltages to the common electrode. A display device that receives image data output by an image system and displays a corresponding image according to the received image data, the display device comprising:
a display panel including a common electrode and a plurality of pixel electrodes;
a data driving circuit for providing a data voltage to the plurality of pixel electrodes;
a common voltage generating circuit for supplying a common voltage to the common electrode;
The data driving circuit provides a first data voltage corresponding to the image data to the plurality of pixel electrodes, and correspondingly, the common voltage generating circuit provides a first common voltage to the common electrode to display the display panel An image frame corresponding to the image data; the data driving circuit provides a second data voltage to the plurality of pixel electrodes before the display panel displays an image image different from the previous image frame, and correspondingly, the common voltage generating circuit Providing a second common voltage to the common electrode, wherein an absolute value of a difference between the second common voltage and the second data voltage is greater than an absolute value of a difference between the first common voltage and the second data voltage, so that the display device displays A grayscale transition screen is scheduled to erase the previous image frame. The display device of claim 21, wherein the transition screen of the predetermined gray scale comprises at least one transition screen of a single gray scale. The display device of claim 22, wherein the transition screen of the predetermined gray scale is a transition screen of a single gray scale. The display device of claim 22, wherein the transition screen of the single gray scale is further a transition screen of a single color. The display device of claim 22, wherein the transition screen of the at least one single gray scale comprises a transition screen of a single color of two different colors. The display device according to claim 25, wherein the grayscale of the transition screen of the single color of the two colors is different. The display device of claim 25, wherein the grayscales of the transition pictures of the single color of the two colors are the same. The display device of claim 25, wherein the transition screens of the two colors different in color are respectively a black transition screen and a white transition screen. The display device according to claim 25, wherein the common voltage generating circuit is different from the second common voltage respectively applied to the common electrode for the transition screen of the single color of the two colors. The display device of claim 29, wherein the common voltage generating circuit applies two different second common voltages to the common electrode to correspondingly drive the display panel to display a transition of the two colors of different colors. a picture, wherein a difference between a second common voltage of the two different second common voltages and the first common voltage is greater than 0, and a difference between the other second common voltage and the first common voltage is less than zero. The display device of claim 30, wherein the second common voltage applied to the common electrode by the common voltage generating circuit is a constant voltage for any one color transition screen. The display device of claim 31, wherein the second data voltage applied to the plurality of pixel electrodes by the data driving circuit is the same for any one color transition screen. The display device of claim 32, wherein the second data voltage applied to the plurality of pixel electrodes by the data driving circuit is different for the transition screen of the single color of the two colors. The display device of claim 33, wherein the common voltage generating circuit applies the same first common voltage to the common electrode, and drives the display panel to display each image frame. The display device of claim 34, wherein the first common voltage is a constant voltage. A driving method of a display device, wherein the display device comprises a common electrode and a plurality of pixel electrodes, and the driving method comprises:
Providing an image data to the display device;
Providing a first data voltage corresponding to the image data to the plurality of pixel electrodes, and correspondingly, providing a first common voltage to the common electrode, so that the display device displays an image image corresponding to the image data;
Providing a second data voltage to the plurality of pixel electrodes before displaying an image image different from the previous image frame, correspondingly providing a second common voltage to the common electrode, the second common voltage and the second data The absolute value of the difference between the voltages is greater than the absolute value of the difference between the first common voltage and the second data voltage, so that the display device displays a transition screen of a predetermined gray level to erase the previous image frame. The driving method of the display device according to claim 36, wherein the transition screen of the predetermined gray scale comprises at least one transition screen of a single gray scale. The driving method of the display device according to claim 37, wherein the transition screen of the predetermined gray scale is a transition screen of a single gray scale. The driving method of the display device according to claim 37, wherein the transition screen of the single gray scale is further a transition screen of a single color. The driving method of the display device according to claim 37, wherein the transition screen of the at least one single gray scale comprises a transition screen of a single color of two different colors. The driving method of the display device according to claim 40, wherein the transition color of the single color of the two colors is different. The driving method of the display device according to claim 40, wherein the transition screen of the single color of the two colors is the same. The driving method of the display device according to claim 40, wherein the transition screens of the two colors different in color are respectively a black transition screen and a white transition screen. The driving method of the display device according to claim 40, wherein for the transition screen of the single color of the two colors, different second common voltages are respectively provided to the common electrode. The driving method of the display device according to claim 44, wherein two different common voltages are provided to the common electrode to correspondingly drive the display device to display a transition picture of the single color different in the two colors, The difference between the second common voltage of the two different second common voltages and the first common voltage is greater than 0, and the difference between the other second common voltage and the first common voltage is less than zero. The driving method of the display device according to claim 45, wherein for any one color transition screen, the second common voltage supplied to the common electrode is a constant voltage. The driving method of the display device according to claim 46, wherein the second data voltage supplied to the plurality of pixel electrodes is the same for any one color transition screen. The driving method of the display device according to claim 47, wherein for the transition screen of the single color of the two colors, different second data voltages are respectively provided to the plurality of pixel electrodes. The driving method of the display device according to claim 48, wherein the same first common voltage is supplied to the common electrode, and the display device is driven to display each image frame. The driving method of the display device according to claim 49, wherein the first common voltage is a constant voltage.