Display panel, driving method thereof and display device

Abstract

The invention discloses a display panel, a driving method thereof and a display device, and relates to the technical field of display. The display panel comprises a plurality of pixel points, and the gray-scale values of the pixel points are refreshed through a first driving mode. The gray-scale value of each pixel point of the display panel is driven by using a first driving mode, so that in the process of presenting a target image on the display panel, the gray-scale value of each pixel point is adjusted to the gray-scale value of a limit optical state, and the ghost shadow in the display panel is eliminated; the gray-scale value of each pixel point in the display panel is determined based on the gray-scale value of the limit optical state and the target image, so that the target gray-scale values of the adjacent pixel points in the display panel have an association relationship, the situation that the numerical value difference of the adjacent gray-scale values is too large is avoided, and the problem of screen flicker existing on the display panel is solved. Finally, ghosting and screen flickering do not exist on the display panel, and the use feeling of a user is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a driving method thereof, and a display device. Background Art

[0002] The afterimage problem refers to the problem that when the display content of the display panel is changed, the previously displayed image fails to completely disappear and leaves a visible trace on the display panel. Currently, the optical rail effect can be used to eliminate the afterimage by switching the grayscale value of the pixel point of the display panel to the grayscale value of the extreme optical state. However, although repeatedly switching the grayscale value of the pixel under extreme optical conditions can eliminate the afterimage, it will inevitably cause screen flickering on the display panel, affecting the user experience.

[0003] Therefore, how to solve the screen flicker problem caused by using the optical guide effect to eliminate afterimages, so that there is neither afterimage nor screen flicker on the display panel and the user experience is improved, has become one of the technical problems that need to be urgently solved in the field of display technology. Summary of the invention

[0004] The present application provides a display panel and a driving method thereof, and a display device, which are used to solve the problem of screen flickering caused by using an optical guide rail effect, so that there is neither afterimage nor screen flickering on the display screen, thereby improving the user experience.

[0005] In a first aspect, the present application discloses a display panel, the display panel comprising a plurality of pixels, the grayscale values ​​of the pixels being refreshed by a first driving mode, the first driving mode comprising:

[0006] The grayscale value of each pixel point is adjusted to the grayscale value of the extreme optical state, and the target grayscale value of each pixel point is determined based on the grayscale value of the extreme optical state and the target image; the target grayscale values ​​of adjacent pixels are correlated; the target image is the image to be displayed on the display panel.

[0007] Based on the same inventive concept, the second aspect of the present application discloses a method for driving a display panel, including the display panel described in the first aspect.

[0008] Based on the same inventive concept, the third aspect of the present application provides a display device, comprising the display panel described in the first aspect.

[0009] Compared with the prior art, this application has the following beneficial effects:

[0010] The present application discloses a display panel, which includes a plurality of pixels, and the grayscale values ​​of the pixels are refreshed by a first driving mode. In the process of driving the grayscale value of each pixel of the display panel using the first driving mode so that the target image is presented on the display panel, the grayscale value of each pixel is adjusted to the grayscale value of the extreme optical state to eliminate the residual image in the display panel; and based on the grayscale value of the extreme optical state and the target image, the grayscale value of each pixel in the display panel is determined, and the target grayscale values ​​of adjacent pixels in the display panel are related to avoid the situation where the values ​​of adjacent grayscale values ​​differ too much, and solve the screen flicker problem on the display panel; finally, there is neither residual image nor screen flicker on the display panel, and the user experience is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 A flowchart of an execution process of a first driving mode provided in an embodiment of the present application;

[0013] Figure 2A A schematic diagram of the principle of a fast-swipe mode of a display panel provided in an embodiment of the present application;

[0014] Figure 2B A schematic diagram of the principle of a first driving mode of a display panel provided in an embodiment of the present application;

[0015] Figure 3 A schematic diagram of the principle of realizing multiple grayscales based on two grayscales provided in an embodiment of the present application;

[0016] Figure 4 A schematic diagram of the working principle of a second driving mode provided in an embodiment of the present application;

[0017] Figure 5 A flowchart of a method for driving a display panel provided in an embodiment of the present application;

[0018] Figure 6 A flowchart of another display panel driving method provided in an embodiment of the present application;

[0019] Figure 7 A schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] Electronic paper is a display screen that forms pixel graphics by coating electronic ink on a thin film and attaching it to a thin film transistor circuit. The principle of electronic paper is to use the electrophoresis of charged particles, that is, two oppositely charged particles move to the two poles of the display under the drive of an electric field, so that one side of the transparent electrode displays the color of one charged particle. Electronic paper has the advantages of energy saving, eye protection, and the ability to maintain display even after power failure. It can imitate the visual perception of printing and writing on paper.

[0021] The afterimage problem is one of the main technical difficulties of electronic paper. The reasons for the afterimage problem on electronic paper include but are not limited to: the driving waveform is not optimized, resulting in inaccurate movement of electronic ink particles; the self-fading characteristics of electronic ink during partial refresh cause grayscale offset; partial refresh cannot fully migrate due to the slow response speed of particles; frequent refresh accelerates performance decay, temperature changes interfere with the physical properties of ink, and destroy the stability of the electric field; long-term DC voltage imbalance causes charge accumulation, forming residual voltage that interferes with grayscale accuracy.

[0022] Currently, the optical guide effect can be used to eliminate afterimages, that is, the grayscale value of the pixel points of the display panel can be switched to the grayscale value of the extreme optical state to eliminate the afterimage; however, repeatedly switching the grayscale value of the pixel points under extreme optical states, although it can eliminate the afterimage, it will inevitably cause the problem of screen flickering on the display panel, affecting the user experience.

[0023] Therefore, how to solve the screen flickering problem caused by using the optical guide effect to eliminate afterimages, so that there is neither afterimage nor screen flickering on the display screen and the user experience is improved, has become one of the technical problems that need to be urgently solved in the field of display technology.

[0024] In order to solve the above problems, the present application discloses a display panel and a driving method of the display panel.

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] Embodiment 1:

[0027] The present application discloses an electronic paper display panel, which includes a plurality of pixels, and the grayscale value of each pixel is refreshed by a first driving mode.

[0028] The first driving mode includes: adjusting the grayscale value of each pixel to the grayscale value of the extreme optical state, and determining the target grayscale value of each pixel based on the grayscale value of the extreme optical state and the target image; the target grayscale values ​​of adjacent pixels are correlated.

[0029] Figure 1 A flowchart of the execution process of a first driving mode provided in an embodiment of the present application.

[0030] Combination Figure 1 As shown, the first driving mode in this application specifically performs the following steps:

[0031] S101, adjusting the grayscale value of each pixel included in the display panel to the grayscale value of the extreme optical state.

[0032] The grayscale value of the extreme optical state includes a highest grayscale and a lowest grayscale.

[0033] In this step, adjusting the grayscale value of each pixel on the display panel to the grayscale value of the extreme optical state means that the grayscale values ​​of the pixels on the display panel after processing are all the highest grayscale, or all the lowest grayscale, or some are the highest grayscale and some are the lowest grayscale.

[0034] In an optional implementation, it may be determined based on the grayscale values ​​of the pixels in the target image to adjust the grayscale values ​​of the pixels included in the display panel to the highest grayscale or the lowest grayscale.

[0035] Exemplarily, it is assumed that the display panel includes pixel A and pixel B. If the grayscale value of the pixel corresponding to pixel A in the target image is biased toward the highest grayscale and deviates from the lowest grayscale, the grayscale value of pixel A is adjusted to the highest grayscale; if the grayscale value of the pixel corresponding to pixel B in the target image is biased toward the lowest grayscale and deviates from the highest grayscale, the grayscale value of pixel B is adjusted to the lowest grayscale.

[0036] S102, determining a target grayscale value of each pixel based on a target image and the grayscale value of the extreme optical state.

[0037] In the present application, the target grayscale values ​​of adjacent pixels are associated with each other. The meaning of the target grayscale values ​​of adjacent pixels being associated with each other is that the target grayscale value of a pixel is generated based on the target grayscale values ​​of other pixels adjacent to the pixel.

[0038] For example, if pixel A and pixel B are adjacent grayscales, and the target grayscale value of pixel A has been determined, the target grayscale value of pixel B is generated based on the target grayscale value of pixel A. This situation is called the target grayscale value of pixel A is associated with the target grayscale value of pixel B.

[0039] In an optional implementation, the target grayscale value of each pixel in the display panel can be determined based on the target image, the grayscale value of the pixel in the display panel in the extreme optical state, and the dithering algorithm. The process includes the following steps:

[0040] (1) Select any pixel from the display panel as the initial pixel.

[0041] (2) The grayscale value of the pixel point corresponding to the initial pixel point in the target image is used as the target grayscale value of the initial pixel point.

[0042] (3) The grayscale value of the extreme optical state corresponding to the initial pixel point in the display panel is taken as the actual grayscale value of the initial pixel point.

[0043] (4) Calculate the difference between the target grayscale value and the actual grayscale value of the initial pixel to obtain the quantization error.

[0044] (5) According to the dithering algorithm, the calculated quantization error is diffused to the surrounding pixels according to a certain weight distribution, and then the target grayscale value of the surrounding pixels is adjusted according to the diffused error.

[0045] In this way, starting from the initial pixel, the entire image is processed pixel by pixel until all pixels in the display panel are processed, and the target grayscale value of each pixel is obtained, thereby achieving a smoother grayscale or color transition.

[0046] Figure 2A A schematic diagram of the principle of a fast refresh mode of a display panel provided in an embodiment of the present application. Figure 2A This means that when using the traditional fast refresh mode, the grayscale value of the pixels in the display panel cannot reach the extreme optical state (black represents the lowest grayscale, and white represents the highest grayscale), which in turn accumulates more grayscale errors and causes afterimages. Figure 2B A schematic diagram of the principle of a first driving mode of a display panel provided in an embodiment of the present application. Figure 2B It means that the first driving mode in the present application is used to drive the pixels in the display panel, and the grayscale value of the pixel can reach the extreme optical state, and the purpose of eliminating the afterimage is achieved by forcing it to reach the extreme optical state; then, according to the grayscale value of the pixel in the target display screen under the extreme optical state and the jitter algorithm, the target grayscale value of each pixel in the display panel is determined to prevent the screen flickering caused by all black or all white.

[0047] It should be noted that even if the target display screen is a gray screen and does not contain other colors and patterns, the full-screen gray scale of the display panel can be achieved according to the gray scale value of the pixel points in the gray screen and the dithering algorithm.

[0048] The dithering algorithm in the present application may be a two-grayscale dithering algorithm or a multi-grayscale dithering algorithm.

[0049] The multi-grayscale dithering algorithm quantizes the image into multiple grayscales, such as 16 grayscales or more; and then determines the target grayscale value of each pixel in the display panel by diffusing the quantization error to the surrounding pixels.

[0050] The two-grayscale dithering algorithm quantizes the image into two grayscales, usually black or white; and then determines the target grayscale value of each pixel in the display panel by diffusing the quantization error to the surrounding pixels.

[0051] Figure 3 A schematic diagram of the principle of realizing multiple grayscales based on two grayscales is provided for an embodiment of the present application. In the schematic diagram, the display unit of the display panel adopts a four-subpixel matrix structure, and grayscale expansion is achieved through a dithering algorithm. Specifically, each display unit is composed of four subpixels with binary response characteristics (black state: 0% brightness, white state: 100% brightness), and grayscale levels with different equivalent brightness are formed by controlling the activation number and spatial distribution of the white state subpixel points in the display unit.

[0052] like Figure 3 As shown, the sub-pixel activation modes corresponding to each grayscale level are as follows: grayscale level L4 (100% brightness, Figure 4 Pattern 5 in the figure) corresponds to the fully activated mode of the four white state sub-pixels; L3 (75% brightness, Figure 3 The 4th pattern in the figure) uses a 3:1 white-black sub-pixel ratio; L2 (50% brightness, Figure 3 Pattern 3 in the figure) achieves mid-tone balance through 2:2 symmetrical distribution; L1 (25% brightness, Figure 3 The 2nd pattern in the figure) uses a 1:3 white-black sub-pixel ratio; L0 (0% brightness, Figure 3 The pattern No. 1 in FIG. 1 is the completely black state reference.

[0053] In this way, by precisely controlling the proportion and spatial distribution of white sub-pixels in the four-sub-pixel matrix, a five-level grayscale visual synthesis effect is achieved while maintaining the original binary drive architecture, which can enhance the grayscale expression and image layering of the display panel.

[0054] Since there is a correlation between the number of gray levels of a display panel and the pixel density of the display panel, using a lower gray level can reduce the reduction in pixel density, but will limit the smoothness of gray transitions; using a higher gray level can achieve a more delicate gray transition, but will aggravate the reduction in pixel density, thereby affecting the clarity and detail presentation of the displayed image. Therefore, when designing a display system, technicians in this field need to make a trade-off between the number of gray levels and pixel density to optimize image quality and display performance.

[0055] The dithering algorithm in the present application may be an error diffusion algorithm or a Bayer dithering algorithm; these two specific dithering algorithms are both suitable for improving the representation of color or grayscale in image processing.

[0056] The error diffusion algorithm improves the visual quality of the image by diffusing the quantization error to the pixels around the target pixel, that is, the error diffusion algorithm diffuses the error to the surrounding of the target pixel to avoid the target pixel from bearing the error completely. This method can make the image look smoother and reduce the visual defects caused by color quantization.

[0057] The Bayer dithering algorithm uses the Bayer dithering table to calculate the dithering value of each pixel, and then adjusts the pixel value to improve the visual quality of the image. The Bayer dithering algorithm involves assigning the quantization error to the current pixel and its neighboring pixels according to the weight in the dithering table, thereby simulating richer colors and grayscale levels under limited color depth.

[0058] The Bayer jitter table is a matrix used in the Bayer jitter algorithm, which contains the weight values ​​used in the jitter process. The Bayer jitter table can be generated based on the target recursive formula. The target recursive formula is specifically:

[0059]

[0060] Among them, M n+1 represents the jitter matrix of the n+1th layer; M n represents the jitter matrix of the nth layer; M1 is the starting matrix of the recursive calculation, that is, the jitter matrix of the first layer; U n Represents the identity matrix of the nth layer, which is a 2×2 identity matrix. Its function is to adjust M in the recursive process. n The value used to adjust the jitter matrix.

[0061] Embodiment 2:

[0062] The present application discloses another electronic paper display panel, which includes a plurality of pixels, and the grayscale value of each pixel can be refreshed by the first driving mode in the first embodiment, or by the second driving mode.

[0063] The second driving mode includes: adjusting the grayscale value of each pixel in the display panel through a PWM (Pulse Width Modulation) mode.

[0064] It can be understood that in the electronic paper display panel, the grayscale of the screen is achieved by the aggregation of electrophoretic particles on the visible surface and the distance of the electrophoretic particles in the dispersion relative to the visible surface; wherein the white electrophoretic particles in the dispersion are negatively charged and the black electrophoretic particles are positively charged.

[0065] Figure 4 A schematic diagram of the working principle of a second driving mode provided in an embodiment of the present application. Figure 4 The horizontal axis of curve 1 is time, and the vertical axis is voltage; Figure 4 The horizontal axis of the middle curve 2 is time, and the vertical axis is gray scale (Gray0-Gray15). Figure 4 Taking 16 grayscales as an example, the process of regulating the grayscale value change of electrophoretic particles by changing the polarity of the driving voltage (15V, -15V or 0V) is introduced. Figure 4 Curve 1 in the middle shows how the driving voltage changes with time, and curve 2 shows how the grayscale value of the electrophoretic particles changes with curve 1.

[0066] Specifically, it is assumed that the grayscale of the pixel points in the display panel is the lowest grayscale at the initial moment, that is, the display panel is black; Figure 4 In stage ①, when a voltage of -15V is applied, the -15V voltage will push the white electrophoretic particles to the upper part of the dispersion. The distance between the white electrophoretic particles and the visible surface is relatively close. At this time, the color on the screen gradually changes from black to white. Figure 4 In the second stage, when 0V voltage is applied, there is no electric field, which will not drive the electrophoretic particles to move, and the grayscale of the pixels in the display panel remains unchanged at 15 grayscales (Gray15); Figure 4 In stage ③, the applied voltage becomes 15V. The positive voltage pushes the black electrophoretic particles to the upper part of the dispersion, which is closer to the visible surface, and attracts the white electrophoretic particles to the bottom of the dispersion, which is farther away from the visible surface. At this time, the color on the screen gradually changes from black to white. Figure 4 In stage ④, after applying 0V voltage, there is no electric field, which will not drive the electrophoretic particles to move, and the grayscale of the pixels in the display panel remains unchanged at 0 grayscale (Gray0); and so on, curve 2 will change with the change of curve 1.

[0067] Using the first driving mode to refresh the grayscale value of the pixel points in the display panel can improve the screen flickering problem caused by the use of the optical rail effect to eliminate the residual image, but it will reduce the display effect of the display panel; while using the second driving mode to refresh the grayscale value of the pixel points in the display panel can ensure that the display panel has a good display effect, but long-term use will lead to the accumulation of more grayscale errors, resulting in residual image problems on the display panel. Therefore, in practical applications, the first driving mode and the second driving mode can be intelligently switched through a preset switching strategy to achieve a balance between display stability and visual comfort.

[0068] In an optional implementation, the switching between the first driving mode and the second driving mode can be achieved through a preset first switching strategy. The first switching strategy includes:

[0069] After the grayscale value of the pixel point is refreshed N times continuously through the second driving mode, the grayscale value of the pixel point is refreshed through the first driving mode; and after the grayscale value of the pixel point is refreshed M times continuously through the first driving mode, the grayscale value of the pixel point is refreshed through the second driving mode; N is a preset first refresh number; M is a preset second refresh number; M is less than or equal to N.

[0070] Since refreshing the grayscale value of a pixel in the display panel once is equivalent to switching the image on the display panel once, the first switching strategy can also be understood as: after refreshing the image in the display screen N times in a row through the second driving mode, refreshing the image in the display screen through the first driving mode; after refreshing the image in the display screen M times in a row through the first driving mode, refreshing the image in the display panel through the second driving mode.

[0071] In the first switching strategy, when the number of consecutive refreshes of any driving mode reaches the preset number of refreshes, the system automatically triggers the mode switching process, and the driving mode switching can be completed without complex calculations. It can solve the problems of afterimage and flicker in the display screen while saving computing resources, and maintain a good image display effect.

[0072] In another optional implementation, the switching between the first driving mode and the second driving mode can be achieved by a preset second switching strategy. The second switching strategy includes:

[0073] In the process of refreshing the grayscale value of the reference pixel point N times continuously through the second driving mode, if the grayscale value of the reference pixel point has not reached the grayscale value of the extreme optical state, the grayscale value of the pixel point is refreshed through the first driving mode; and after refreshing the grayscale value of the pixel point M times continuously through the first driving mode, the grayscale value of the pixel point is refreshed through the second driving mode.

[0074] Among them, the reference pixel point is the pixel point with the largest grayscale error accumulation among multiple pixels of the display panel at the current moment; N is the preset first refresh number; M is the preset second refresh number; M is less than or equal to N.

[0075] Since refreshing the grayscale value of a pixel in the display panel once is equivalent to switching the screen on the display panel once, the second switching strategy can also be understood as:

[0076] Determine the pixel with the largest accumulated grayscale error in the display panel at the current moment as the reference pixel; track the driving history of the reference pixel; if the grayscale value of the reference pixel has not reached the grayscale value of the extreme optical state after the image of the display panel is refreshed N times continuously by the second driving mode, switch the second driving mode to the first driving mode, and refresh the image of the display panel by the first driving mode; and when the picture in the display picture is refreshed M times continuously by the first driving mode, switch the first driving mode to the second driving mode, and refresh the picture in the display panel by the second driving mode.

[0077] Compared with the first switching strategy, the second switching strategy adds a judgment on whether the grayscale value of the reference pixel touches the optical rail during N consecutive switching processes. The second switching strategy switches the second driving mode to the first driving mode and switches the driving mode only when it is determined that the grayscale value of the reference pixel does not touch the optical rail during N consecutive switching processes, that is, the accumulated grayscale error of the reference pixel is large, which may cause the screen flickering problem. This switching strategy can avoid the degradation of display performance caused by frequent switching while solving the screen flickering problem.

[0078] Embodiment three:

[0079] Based on the display panel provided in Example 1, the present application further provides a method for driving the display panel. The method for driving the display panel in the present application includes: adjusting the grayscale value of each pixel point included in the display panel to the grayscale value of the extreme optical state; determining the target grayscale value of each pixel point based on the target image and the grayscale value of the extreme optical state. For the specific content of the driving method, please refer to the text introduction in Example 1, which will not be repeated here.

[0080] Embodiment 4:

[0081] Based on the display panel provided in the second embodiment, the present application also provides a method for driving the display panel. Figure 5 A flowchart of a method for driving a display panel provided in an embodiment of the present application.

[0082] Combination Figure 5 As shown, the driving method of the display panel includes the following steps:

[0083] S501, determining a target driving mode.

[0084] The target driving mode in the present application is the first driving mode or the second driving mode.

[0085] In the present application, the driving mode currently being run and used to refresh the grayscale value of the pixel point is taken as the target driving mode.

[0086] If the target driving mode is the second driving mode, the process proceeds to S502 ; if the target driving mode is the first driving mode, the process proceeds to S505 .

[0087] S502, determining whether the number of times the grayscale value of a pixel in the display panel is continuously refreshed by the second driving mode is greater than a preset first refresh number.

[0088] If the number of times the grayscale values ​​of the pixels in the display panel are continuously refreshed by the second driving mode is greater than the preset first refresh number, the process proceeds to S504 ; otherwise, the process proceeds to S503 .

[0089] S503 , continue to refresh the grayscale values ​​of the pixels in the display panel using the second driving mode.

[0090] S504, switching the second driving mode to the first driving mode, and refreshing the grayscale values ​​of the pixels in the display panel by using the first driving mode.

[0091] S505 , determining whether the number of times the grayscale value of the pixel in the display panel is continuously refreshed by the first driving mode is greater than a preset second refresh number.

[0092] If the number of times the grayscale values ​​of the pixels in the display panel are continuously refreshed by the first driving mode is greater than the preset second refresh number, the process proceeds to S507 ; otherwise, the process proceeds to S506 .

[0093] S506 , continue to refresh the grayscale values ​​of the pixels in the display panel using the first driving mode.

[0094] S507 , switching the first driving mode to the second driving mode, and refreshing the grayscale values ​​of the pixels in the display panel by using the second driving mode.

[0095] use Figure 5 The display panel driving method shown in: can solve the problems of afterimage and screen flicker in the display screen and maintain a good image display effect under the premise of minimizing the computing load and saving computing resources.

[0096] Embodiment five:

[0097] Based on the display panel provided in the second embodiment, the present application also provides another method for driving the display panel. Figure 6 A flowchart of another display panel driving method provided in an embodiment of the present application. Figure 6 As shown, another method for driving a display panel includes the following steps:

[0098] S601, determining a target driving mode.

[0099] In the present application, the target driving mode is the first driving mode or the second driving mode.

[0100] In the present application, the driving mode currently being run and used to refresh the grayscale value of the pixel point is taken as the target driving mode.

[0101] If the target driving mode is the second driving mode, the process proceeds to S602 ; if the target driving mode is the first driving mode, the process proceeds to S606 .

[0102] S602, determining whether the number of times the grayscale value of the reference pixel in the display panel is continuously refreshed by the second driving mode is greater than a preset first refresh number.

[0103] The reference pixel is a pixel with the largest accumulated grayscale error among multiple pixel points of the display panel at the current moment.

[0104] If the number of times the grayscale value of the reference pixel in the display panel is continuously refreshed by the second driving mode is greater than the preset first refresh number, the process proceeds to S603 ; otherwise, the process proceeds to S604 .

[0105] S603, determining whether the grayscale value of the reference pixel has reached an optical limit state during continuous refreshing of the grayscale value of the reference pixel by the second driving mode.

[0106] During the process of continuously refreshing the grayscale value of the reference pixel point through the second driving mode, if the grayscale value of the reference pixel point reaches the extreme optical state, the process proceeds to S604; otherwise, the process proceeds to S605.

[0107] S604: Continue to refresh the grayscale values ​​of the pixels in the display panel using the second driving mode.

[0108] S605 , switching the second driving mode to the first driving mode, and refreshing the grayscale values ​​of the pixels in the display panel by using the first driving mode.

[0109] S606: Determine whether the number of times the grayscale value of the pixel in the display panel is continuously refreshed by the first driving mode is greater than a preset second refresh number.

[0110] If the number of times the grayscale values ​​of the pixels in the display panel are continuously refreshed by the first driving mode is greater than the preset second refresh number, the process proceeds to S607 ; otherwise, the process proceeds to S608 .

[0111] S607 , continue to refresh the grayscale values ​​of the pixels in the display panel using the first driving mode.

[0112] S608, switching the first driving mode to the second driving mode, and refreshing the grayscale values ​​of the pixels in the display panel by using the second driving mode.

[0113] use Figure 6 The driving method of the display panel shown in the figure can solve the problems of afterimage and screen flicker in the display panel while improving the display effect of the picture of the display panel as much as possible.

[0114] Based on the same inventive concept, the present application also provides a display device. Figure 7 A schematic diagram of the structure of a display device provided in an embodiment of the present application. Figure 7 As shown, the display device 7 includes the display panel 700 provided in the above embodiment. Therefore, the display device also has the beneficial effects of the electrophoretic display panel in the above embodiment. The similarities can be understood by referring to the above explanation of the display panel, which will not be repeated herein.

[0115] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The device embodiment described above is merely schematic, in which the unit described as a separate component may or may not be physically separated, and the component prompted as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0116] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A display panel, characterized in that: The display panel includes a plurality of pixels, and the grayscale values ​​of the pixels are refreshed by a first driving mode, wherein the first driving mode includes: The grayscale value of each pixel point is adjusted to the grayscale value of the extreme optical state, and the target grayscale value of each pixel point is determined based on the grayscale value of the extreme optical state and the target image; the target grayscale values ​​of adjacent pixels are correlated; the target image is the image to be displayed on the display panel.

2. The display panel according to claim 1, characterized in that: The step of determining a target grayscale value of each pixel based on the grayscale value of the extreme optical state and the target image comprises: Based on the grayscale value of the extreme optical state, the target image and the dithering algorithm, a target grayscale value of each pixel is determined.

3. The display panel according to claim 2, characterized in that: The dithering algorithm is a two-grayscale dithering algorithm or a multi-grayscale dithering algorithm.

4. The display panel according to claim 2, characterized in that: The dithering algorithm is an error diffusion algorithm or a Bayer dithering algorithm.

5. The display panel according to claim 1, characterized in that: The target grayscale values ​​of the adjacent pixels are associated with each other, including: The target grayscale value of a pixel is generated based on the target grayscale values ​​of other pixels adjacent to the pixel.

6. The display panel according to claim 1, characterized in that: The grayscale value of the pixel is also refreshed by a second driving mode, and the second driving mode includes: The grayscale value of the pixel is adjusted through the PWM mode.

7. The display panel according to claim 6, characterized in that: The switching method between the first driving mode and the second driving mode includes: After the grayscale value of the pixel point is continuously refreshed N times by the second driving mode, the grayscale value of the pixel point is refreshed by the first driving mode; N is a preset first refresh number; And, after the grayscale value of the pixel point is continuously refreshed M times by the first driving mode, the grayscale value of the pixel point is refreshed by the second driving mode; M is a preset second refresh number.

8. The display panel according to claim 6, characterized in that: The switching method between the first driving mode and the second driving mode includes: In the process of continuously refreshing the grayscale value of the reference pixel point N times by using the second driving mode, if the grayscale value of the reference pixel point has not reached the grayscale value of the extreme optical state, the grayscale value of the pixel point is refreshed by using the first driving mode; the reference pixel point is the pixel point with the largest grayscale error accumulation amount among the multiple pixel points at the current moment; N is a preset first refresh number; And, after the grayscale value of the pixel point is continuously refreshed M times by the first driving mode, the grayscale value of the pixel point is refreshed by the second driving mode; M is a preset second refresh number.

9. A method for driving a display panel, characterized in that: The display panel includes a plurality of pixels; the method includes: The grayscale value of the pixel point is refreshed through the first driving mode; the first driving mode includes: adjusting the grayscale value of each pixel point to the grayscale value of the extreme optical state, and determining the target grayscale value of each pixel point based on the grayscale value of the extreme optical state and the target image; the target grayscale values ​​of adjacent pixel points are correlated; the target image is the image to be displayed in the display panel.

10. The method according to claim 9, characterized in that The method further comprises: The grayscale value of the pixel is refreshed through a second driving mode; the second driving mode includes: adjusting the grayscale value of the pixel through a PWM mode.

11. The method according to claim 10, characterized in that The method further comprises: After the grayscale value of the pixel point is continuously refreshed N times by the second driving mode, the grayscale value of the pixel point is refreshed by the first driving mode; N is a preset first refresh number; And, after the grayscale value of the pixel point is continuously refreshed M times by the first driving mode, the grayscale value of the pixel point is refreshed by the second driving mode; M is a preset second refresh number.

12. The method according to claim 10, characterized in that The method further comprises: In the process of continuously refreshing the grayscale value of the reference pixel point N times by using the second driving mode, if the grayscale value of the reference pixel point has not reached the grayscale value of the extreme optical state, the grayscale value of the pixel point is refreshed by using the first driving mode; the reference pixel point is a pixel point with the largest grayscale error accumulation amount among the plurality of pixel points at the current moment; N is a preset first refresh number; And, after the grayscale value of the pixel point is continuously refreshed M times by the first driving mode, the grayscale value of the pixel point is refreshed by the second driving mode; M is a preset second refresh number.

13. A display device, characterized in that: include: The display panel according to any one of claims 1 to 8.

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