Gray scale compensation method and device of display panel, display device and storage medium

Abstract

This invention discloses a grayscale compensation method, apparatus, display device, and storage medium for a display panel. The grayscale compensation method for the display panel includes: acquiring a first gamma curve of the sub-pixel in a monochrome display mode and a second gamma curve in a white display mode; determining first brightness information of the sub-pixel in the central display area of ​​the display panel under the monochrome display mode and a preset display grayscale, and second brightness information of the sub-pixel in the central display area of ​​the display panel under the white display mode and the preset display grayscale; and determining the compensation grayscale of the sub-pixel in the monochrome display mode based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve. By employing the above technical solution, grayscale compensation is performed jointly using compensation data from both the monochrome display mode and the white display mode, resulting in good grayscale compensation performance and improved display uniformity of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a grayscale compensation method, apparatus, display device, and storage medium for a display panel. Background Technology

[0002] Currently, display devices still suffer from brightness non-uniformity issues, which are mainly caused by the power supply voltage drop (IR Drop) generated during image driving.

[0003] There is room for improvement in existing methods for improving the non-uniformity of display brightness in display devices. Summary of the Invention

[0004] This invention provides a grayscale compensation method, apparatus, display device, and storage medium for a display panel to improve the display uniformity of the display panel.

[0005] According to one aspect of the present invention, a grayscale compensation method for a display panel is provided, the display panel comprising a plurality of sub-pixels, the grayscale compensation method comprising:

[0006] Obtain the first gamma curve of the sub-pixel in monochrome display mode and the second gamma curve in white display mode;

[0007] Determine the first brightness information of the sub-pixels in the center display area of ​​the display panel under the monochrome display mode and the preset display grayscale, and the second brightness information of the sub-pixels in the center display area of ​​the display panel under the white display mode and the preset display grayscale;

[0008] The compensation grayscale of the sub-pixel in the monochrome display mode is determined based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve.

[0009] According to another aspect of the present invention, a grayscale compensation device for a display panel is provided, the display panel including a plurality of sub-pixels, the grayscale compensation device comprising:

[0010] The gamma curve acquisition module is used to acquire the first gamma curve of the sub-pixel in monochrome display mode and the second gamma curve in white display mode.

[0011] The brightness information determination module is used to determine the first brightness information of the sub-pixels in the center display area of ​​the display panel under the monochrome display mode and the preset display grayscale, and the second brightness information of the sub-pixels in the center display area of ​​the display panel under the white display mode and the preset display grayscale.

[0012] The grayscale compensation determination module is used to determine the grayscale compensation of the sub-pixel in the monochrome display mode based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve.

[0013] According to another aspect of the present invention, a display device is provided, comprising: a display panel and a driver chip;

[0014] The display panel includes a display area and a non-display area surrounding the display area; the display area includes a plurality of sub-pixels arranged in an array; the non-display area includes a chip mounting area; the driving chip is disposed in the chip mounting area;

[0015] The driving chip is used to execute the grayscale compensation method of the display panel described above to determine the compensation grayscale of the sub-pixel in monochrome display mode.

[0016] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the grayscale compensation method for the display panel described above.

[0017] The grayscale compensation method for a display panel provided by this invention first obtains the first gamma curve of a sub-pixel in a color display mode and the second gamma curve in a white display mode. Then, it determines the first luminance information of the sub-pixel in the center display area of ​​the display panel under a monochrome display mode and a preset grayscale, and the second luminance information of the sub-pixel in the center display area of ​​the display panel under a white display mode and a preset grayscale. Finally, it determines the compensation grayscale of the sub-pixel in the monochrome display mode based on the first luminance information, the first gamma curve, the second luminance information, and the second gamma curve. Since IRdrop has a significant impact in the white display mode, in this embodiment of the invention, the compensation grayscale of the sub-pixel in the monochrome display mode is determined jointly by compensation data from both the monochrome and white display modes. This increases the accuracy of the grayscale compensation data and improves the display uniformity of the display panel.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic flowchart of a grayscale compensation method provided in an embodiment of the present invention;

[0022] Figure 3 This is a flowchart illustrating another grayscale compensation method provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram illustrating the determination of the first adjusted grayscale provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram illustrating the determination of the second adjusted grayscale provided in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of a compensation effect provided by an embodiment of the present invention;

[0026] Figure 7 This is a flowchart illustrating another grayscale compensation method provided in an embodiment of the present invention;

[0027] Figure 8 This is a flowchart illustrating another grayscale compensation method provided in an embodiment of the present invention;

[0028] Figure 9 This is a flowchart illustrating another grayscale compensation method provided in an embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of a grayscale compensation device provided in an embodiment of the present invention;

[0030] Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] Since the driver chip in a display panel is typically located at the bottom bezel, its output terminals are electrically connected to the data lines to provide display voltage signals to a row of sub-pixels connected to those data lines. Because the data lines are mostly metal traces, an IR drop occurs in the data lines during signal transmission. This causes a difference in the display signals received by sub-pixels closer to the driver chip and those farther away, resulting in uneven display.

[0034] To address the aforementioned technical problems, embodiments of the present invention provide a grayscale compensation method for a display panel, which performs grayscale compensation on sub-pixels in different areas of the display panel, thereby improving the display effect of the display panel. This method can be executed by a grayscale compensation device for a display panel provided in embodiments of the present invention. The grayscale compensation device for the display panel can be implemented in hardware and / or software, and can be configured in the driver chip of the display device.

[0035] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, such as... Figure 1 As shown, the display panel 100 includes an array of sub-pixels 110. For example, each sub-pixel 110 may include red, green, and blue sub-pixels. The light-emitting elements in the red sub-pixels emit red light, the light-emitting elements in the green sub-pixels emit green light, and the light-emitting elements in the blue sub-pixels emit blue light. Each sub-pixel 110 may include a light-emitting element and a driving circuit. The driving circuit drives the light-emitting element to emit light, ensuring the normal display function of the display panel.

[0036] Figure 2 A flowchart of a grayscale compensation method for a display panel provided in an embodiment of the present invention is shown in the reference. Figure 1 and Figure 2 The method includes:

[0037] S110: Obtain the first gamma curve of the subpixel in monochrome display mode and the second gamma curve in white display mode.

[0038] The gamma curve represents the relationship between the grayscale level and brightness of a subpixel. The first gamma curve represents the relationship between grayscale level and brightness in monochrome display modes, such as red, green, or blue. The second gamma curve represents the relationship between grayscale level and brightness in white display mode.

[0039] Furthermore, obtaining the first gamma curve of a sub-pixel in monochrome display mode and the second gamma curve in white display mode refers to obtaining the first gamma curve of the same sub-pixel in monochrome display mode and the second gamma curve in white display mode. Since the display panel includes multiple sub-pixels arranged in an array, obtaining the first gamma curve of a sub-pixel in monochrome display mode and the second gamma curve in white display mode can be understood as obtaining the first gamma curve of every sub-pixel in the display panel in monochrome display mode and the second gamma curve in white display mode. This facilitates subsequent grayscale compensation for each sub-pixel, ensuring compensation accuracy. Alternatively, it can be understood as dividing the display panel into several display sub-regions, obtaining the first gamma curve of one sub-pixel in monochrome display mode and the second gamma curve in white display mode for each sub-pixel in each sub-region, and using the compensation data determined by that sub-pixel to perform grayscale compensation for each sub-pixel in that sub-region. This ensures grayscale compensation for all sub-pixels in the display panel while reducing data computation and improving compensation efficiency. Specifically, the number of sub-pixels contained in each display sub-area can be determined based on the compensation accuracy. For example, when the compensation accuracy requirement is high, the number of sub-pixels contained in each display sub-area can be small, such as 2*2 sub-pixels, 5*5 sub-pixels, or 6*8 sub-pixels; when the compensation accuracy requirement is low, the number of sub-pixels contained in each display sub-area can be large, such as 10*10 sub-pixels, 20*30 sub-pixels, or 50*70 sub-pixels. This embodiment of the invention does not limit the compensation accuracy or the number of sub-pixels contained in each display sub-area. Furthermore, the number of sub-pixels contained in each display sub-area can be the same or different, and this embodiment of the invention does not limit this either. For example, based on the display resolution of the display panel, the entire display area can be divided into multiple display sub-areas on an even basis, so that each display sub-area contains the same number of sub-pixels. Alternatively, in areas with high display uniformity requirements, the number of sub-pixels contained in the display sub-areas can be small to achieve accurate compensation, while in areas with low display uniformity requirements, the number of sub-pixels contained in the display sub-areas can be large to improve compensation efficiency.

[0040] S120. Determine the first brightness information of the sub-pixels in the center display area of ​​the display panel under monochrome display mode and preset display grayscale, and the second brightness information of the sub-pixels in the center display area of ​​the display panel under white display mode and preset display grayscale.

[0041] As mentioned earlier, because the sub-pixels closer to the driving chip experience less signal loss, while those farther from the driving chip experience greater loss, the display signal received by the sub-pixels in the center of the display panel closely matches the actual display requirements. Therefore, the brightness information of the sub-pixels in the center of the display panel can be used as the reference brightness for subsequent grayscale compensation of the sub-pixels in other display areas. This means determining the first brightness information of the sub-pixels in the center of the display panel under monochrome display mode and a preset grayscale, as well as the second brightness information of the sub-pixels in the center of the display panel under white display mode and a preset grayscale.

[0042] It should be noted that the preset display grayscale can be a single display grayscale or multiple display grayscales. This embodiment of the invention does not limit the specific number of grayscales included in the preset display grayscale. When the preset display grayscale includes a single display grayscale, the brightness information of the sub-pixels in the center display area of ​​the display panel under that single preset display grayscale can be determined based on that single preset display grayscale. This simplifies the determination of the first and second brightness information and ensures high overall grayscale compensation efficiency. When a preset display grayscale includes multiple display grayscales, the brightness information of the sub-pixels in the center display area of ​​the display panel under these multiple preset display grayscales can be determined based on the multiple brightness information corresponding to these multiple preset display grayscales. For example, the brightness information of the sub-pixels in the center display area of ​​the display panel under these multiple preset display grayscales can be determined based on the average brightness information of the multiple brightness information, or based on the median brightness value information of the multiple brightness information, or based on other calculation methods. This embodiment of the invention does not limit how the brightness information of the sub-pixels in the center display area of ​​the display panel under these multiple preset display grayscales is determined based on the median brightness value information of the multiple brightness information. Determining the brightness information of the sub-pixels in the center display area of ​​the display panel under these multiple preset display grayscales using the median brightness value information of the multiple brightness information ensures high accuracy of the brightness information and good grayscale compensation efficiency.

[0043] S130. Determine the compensation grayscale of the sub-pixel in monochrome display mode based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve.

[0044] The compensation grayscale of the sub-pixel in monochrome display mode is determined based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve. In other words, the compensation grayscale is determined based on the display information of the sub-pixel in monochrome display mode, the display information in white display mode, and the display information of the sub-pixel in the center display area of ​​the display panel. That is, the compensation grayscale is determined by combining the compensation data in monochrome display mode and the compensation data in white display mode. This can increase the accuracy of grayscale compensation data and improve the display uniformity of the display panel.

[0045] It should be noted that since monochrome display modes can include multiple different monochrome display modes, such as red, green, and blue, when determining the compensation grayscale of a sub-pixel in monochrome display mode based on the first luminance information, the first gamma curve, the second luminance information, and the second gamma curve, the monochrome display mode corresponding to the first luminance information and the first gamma curve is the same as the monochrome display mode to be compensated. In other words, the compensation grayscale of a sub-pixel in red display mode is determined using the first luminance information and the first gamma curve in red display mode, and the second luminance information and the second gamma curve in white display mode; the compensation grayscale of a sub-pixel in green display mode is determined using the first luminance information and the first gamma curve in green display mode, and the second luminance information and the second gamma curve in white display mode; and the compensation grayscale of a sub-pixel in blue display mode is determined using the first luminance information and the first gamma curve in blue display mode, and the second luminance information and the second gamma curve in white display mode. This ensures the accuracy of the grayscale compensation data.

[0046] In summary, the grayscale compensation method in this embodiment of the invention first obtains the first gamma curve of a sub-pixel in a color display mode and the second gamma curve in a white display mode. Then, it determines the first luminance information of the sub-pixel in the center display area of ​​the display panel under a monochrome display mode and a preset display grayscale, and the second luminance information of the sub-pixel in the center display area of ​​the display panel under a white display mode and a preset display grayscale. Finally, it determines the compensation grayscale of the sub-pixel in the monochrome display mode based on the first luminance information, the first gamma curve, the second luminance information, and the second gamma curve. Since IR drop has a significant impact in the white display mode, the compensation grayscale of the sub-pixel in the monochrome display mode in this embodiment of the invention is determined jointly by compensation data from both the monochrome display mode and the white display mode. This increases the accuracy of the grayscale compensation data and improves the display uniformity of the display panel.

[0047] Based on the above embodiments, the following provides a detailed explanation of how to determine the compensation grayscale of a sub-pixel in monochrome display mode according to the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve.

[0048] Specifically, Figure 3 This is a flowchart illustrating another grayscale compensation method provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the grayscale compensation method provided in this embodiment of the invention includes:

[0049] S210: Obtain the first gamma curve of the subpixel in monochrome display mode and the second gamma curve in white display mode.

[0050] S220. Determine the first brightness information of the sub-pixels in the center display area of ​​the display panel under monochrome display mode and preset display grayscale, and the second brightness information of the sub-pixels in the center display area of ​​the display panel under white display mode and preset display grayscale.

[0051] S230. Determine the first compensated grayscale component of the sub-pixel in monochrome display mode based on the first brightness information and the first gamma curve.

[0052] The first compensated grayscale component can be understood as the compensated grayscale component determined according to the monochrome display mode.

[0053] Optionally, determining the first compensated grayscale component of the sub-pixel in monochrome display mode based on the first brightness information and the first gamma curve may include:

[0054] The first adjusted gray level is determined based on the first brightness information and the first gamma curve;

[0055] The first compensated gray level component of the sub-pixel in monochrome display mode is determined based on the first adjusted gray level, the preset display gray level, and the first compensation coefficient; wherein, the first compensated gray level component Δgray 1, the first adjusted gray level gray 1, the preset display gray level gray N, and the first compensation coefficient K1 satisfy Δgray 1=K1*(gray 1-gray N), where 0≤K1<1.

[0056] Specifically, the first brightness information refers to the brightness information of the sub-pixels in the central display area of ​​the display panel under monochrome display mode and a preset display grayscale. The preset display grayscale can be set according to requirements, such as one or more of gray 20, gray 100, gray 127, and gray 255; alternatively, the preset display grayscale can be determined based on user experience. For example, if user experience indicates that gray 88 corresponds to a better subsequent grayscale compensation effect under the first brightness information, then the preset display grayscale can be set to gray 88. This embodiment of the invention does not limit the specific method for determining the preset display grayscale.

[0057] Figure 4This is a schematic diagram illustrating the determination of the first adjusted grayscale according to an embodiment of the present invention, where gamma1 represents the first gamma curve, gray on the horizontal axis represents grayscale, and luminance on the vertical axis represents brightness. Combined with... Figure 4 As shown, in the first gamma curve, the horizontal coordinate value corresponding to the intersection of the brightness line corresponding to the first brightness information and the first gamma curve is the first adjusted gray level gray 1.

[0058] Furthermore, the first compensation grayscale component Δgray1, the first adjustment grayscale gray1, the preset display grayscale grayN, and the first compensation coefficient K1 satisfy Δgray1=K1*(gray1-grayN), where 0≤K1<1. That is, the product of the difference between the first adjustment grayscale and the preset display grayscale and the first compensation coefficient K1 is the compensation component in monochrome display mode. In this way, the brightness information of the sub-pixels in the center display area of ​​the display panel in monochrome display mode and preset display grayscale can be used to compensate the display grayscale of the sub-pixels in monochrome display mode.

[0059] It should be noted that the first compensation coefficient K1 satisfies 0 ≤ K1 < 1, meaning K1 can be 0 but cannot be 1. This means that grayscale compensation for sub-pixels can be performed solely using the compensation component from the subsequent white display mode, but not solely using the compensation component from the monochrome display mode. This is because the IR drop of sub-pixels has a greater impact in white display mode; therefore, the grayscale compensation amount must include the compensation component from the white display mode. This increases the accuracy of the grayscale compensation data and improves the display uniformity of the panel.

[0060] S240. Determine the second compensated grayscale component of the sub-pixel in monochrome display mode based on the second brightness information and the second gamma curve.

[0061] The second compensation grayscale component can be understood as the compensation grayscale component determined based on the white display mode.

[0062] Optionally, determining the second compensated grayscale component of the sub-pixel in monochrome display mode based on the second brightness information and the second gamma curve includes:

[0063] The second adjusted grayscale is determined based on the second brightness information and the second gamma curve;

[0064] The second compensated grayscale component of the sub-pixel in monochrome display mode is determined based on the second adjusted grayscale, the preset display grayscale, and the second compensation coefficient; wherein, the second compensated grayscale component Δgray2, the second adjusted grayscale gray2, the preset display grayscale grayN, and the second compensation coefficient K2 satisfy Δgray2=K2*(gray2-grayN), where 0 <K2≤1。

[0065] Specifically, the second luminance information is the luminance information of the sub-pixels in the central display area of the display panel in the white display mode and a preset display gray level. The preset display gray level can be set according to requirements, such as one or more of gray 20, gray 100, gray 127, and gray 255; or, the preset display gray level can also be determined according to the user's empirical value. For example, it is determined that the subsequent gray level compensation effect is better under the first luminance information corresponding to gray 88 according to the user's experience. Therefore, the preset display gray level can be determined as gray 88. The embodiment of the present invention does not limit the specific determination method of the preset display gray level.

[0066] Figure 5 is a schematic diagram for determining the second adjusted gray level provided by an embodiment of the present invention. Among them, gamma2 represents the second gamma curve, gray in the abscissa represents the gray level, and luminance in the ordinate represents the luminance. Combining Figure 5 As shown, in the second gamma curve, the abscissa value corresponding to the intersection position of the luminance line corresponding to the second luminance information and the second gamma curve is the second adjusted gray level gray 2.

[0067] Further, the second compensation gray level component Δgray 2, the second adjusted gray level gray 2, the preset display gray level grayN, and the second compensation coefficient K2 satisfy Δgray 2 = K2 * (gray 2 - gray N), where 0 < K2 ≤ 1. That is, the product of the difference between the second adjusted gray level and the preset display gray level and the second compensation coefficient K2 is the compensation component in the white display mode. In this way, the display gray level of the sub-pixels in the white display mode can be compensated by the luminance information of the sub-pixels in the central display area of the display panel in the white display mode and the preset display gray level.

[0068] It should be noted that the second compensation coefficient K2 satisfies 0 < K2 ≤ 1. That is, K2 can be 1, but cannot be 0. That is, the sub-pixels can be gray level compensated only by the compensation component in the white display mode, but cannot be gray level compensated only by the compensation component in the monochromatic display mode. The reason is that the influence of the IR drop of the sub-pixels in the white display mode is relatively large. Therefore, the gray level compensation amount needs to include the compensation component in the white display mode. In this way, the accuracy of the gray level compensation data can be increased, and the display uniformity of the display panel can be improved.

[0069] S250. Determine the compensation gray level of the sub-pixels in the monochromatic display mode according to the first compensation gray level component and the second compensation gray level component.

[0070] Specifically, by combining the above, the first and second compensation grayscale components are used to obtain the compensation grayscale of the sub-pixel in the unit display mode, which is to say, the compensation grayscale components in the monochrome display mode and the compensation grayscale components in the white display mode are used to obtain the compensation grayscale of the sub-pixel in the unit display mode.

[0071] Optionally, determining the compensated grayscale of a sub-pixel in monochrome display mode based on the first compensated grayscale component and the second compensated grayscale component may include:

[0072] The first and second compensation grayscale components are summed to determine the compensation grayscale of the sub-pixel in monochrome display mode; wherein, the compensation grayscale Δgray, the first compensation grayscale component Δgray 1, and the second compensation grayscale component Δgray 2 satisfy Δgray=Δgray 1+Δgray 2, and K1+K2=1.

[0073] In other words, the total compensated grayscale is obtained by summing the compensated grayscale components in monochrome display mode and white display mode.

[0074] Specifically, Figure 6 This is a schematic diagram of a compensation effect provided by an embodiment of the present invention, specifically showing the compensation effect on the side near the driver chip under gray 240. Figure 6 The left-hand side of the figure, which is the figure under the subscript (1), shows the compensation effect on the side near the driver chip under gray240 when the first compensation coefficient K1 = 0.7 and the second compensation coefficient K2 = 0.3. At this time, the compensation amount on the side near the driver chip is -1. Figure 6 The middle figure in the figure, namely the figure with subscript (2), shows the compensation effect on the side near the driver chip under gray 240 when the first compensation coefficient K1 = 0.3 and the second compensation coefficient K2 = 0.7. At this time, the compensation amount on the side near the driver chip is -5. Figure 6 The right-hand side of the figure, namely the figure under subscript (3), shows the compensation effect on the side near the driver chip under Gray 240 when the first compensation coefficient K1 = 0 and the second compensation coefficient K2 = 1. At this time, the compensation amount on the side near the driver chip is -7. That is to say, as the first compensation coefficient K1 decreases and the second compensation coefficient K2 increases, the compensation amount on the side near the driver chip under Gray 240 becomes smaller. In the actual compensation process, the weight ratio of the first compensation coefficient K1 and the second compensation coefficient K2 can be reasonably adjusted according to the compensation requirements to ensure a good compensation effect and to ensure that the display uniformity of the display panel can be improved.

[0075] It should be noted that the compensation amounts -1, -5, and -7 mentioned above can be understood as dimensionless compensation data, which only represent the compensation differences under different compensation scenarios.

[0076] In summary, the compensation grayscale is determined by combining compensation data from monochrome display mode and white display mode. Furthermore, the weight ratio of compensation components in different modes can be further adjusted according to compensation requirements to further increase the accuracy of grayscale compensation data and improve the display uniformity of the display panel.

[0077] Based on the above embodiments, the following will explain how to obtain the first gamma curve and the second gamma curve. Specifically, Figure 7 This is a flowchart illustrating another grayscale compensation method provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the grayscale compensation method provided in this embodiment of the invention includes:

[0078] S310, the control display panel displays at least two monochrome display images in the first display grayscale.

[0079] Since the gamma curve can represent the correspondence between the display grayscale and display brightness of a subpixel, when determining the gamma curve in monochrome display mode, it is necessary to control the display panel to display at least two different display grayscale images.

[0080] Understandably, when determining the first gamma curve, the display panel can be controlled to display multiple monochrome images at the first grayscale level, such as 50, 80, 128, or more, thus increasing the accuracy of the first gamma curve. However, the more grayscale levels there are, the greater the computational load for determining the first gamma curve, and the lower the efficiency of its determination. Therefore, the number of grayscale levels should be reasonably selected based on the accuracy requirements and efficiency of the first gamma curve to ensure a balance between accuracy and efficiency.

[0081] S320: Obtain the first image information of the monochrome display screen.

[0082] Specifically, the first image information of the monochrome display can be obtained by taking a picture of the monochrome display screen displayed on the display panel through the camera unit.

[0083] S330. Determine the first brightness information of the sub-pixel under the at least two first display grayscale levels based on the first image information.

[0084] Specifically, the image brightness can be extracted from the first image information to determine the first brightness information of the sub-pixel under the above-mentioned at least two first display gray levels, thus determining the correspondence between the first display gray levels and the first brightness information.

[0085] S340. Based on the first brightness information and the first display grayscale, the first gamma curve is obtained by fitting using the first preset algorithm.

[0086] Specifically, the first gamma curve can be determined based on the correspondence between the first brightness information and the first display grayscale. For example, the first gamma curve can be obtained by fitting a first preset algorithm, which can be an interpolation method; this embodiment of the invention does not limit this method.

[0087] S350, the control display panel displays at least two white display images in the second display grayscale.

[0088] Since the gamma curve can represent the correspondence between the display grayscale and display brightness of a subpixel, when determining the gamma curve in white display mode, it is necessary to control the display panel to display at least two different display grayscale images.

[0089] Understandably, when determining the second gamma curve, the display panel can be controlled to display multiple monochrome images at different second gray levels, such as 50, 80, 128, or more, thus increasing the accuracy of the second gamma curve. However, the more gray levels there are, the greater the computational load for determining the second gamma curve, and the lower the efficiency of its determination. Therefore, the number of gray levels should be reasonably selected based on the accuracy requirements and efficiency of the second gamma curve to ensure a balance between accuracy and efficiency.

[0090] Furthermore, the first and second display grayscale levels are the same, meaning that the same grayscale is used for both monochrome and white display images. This ensures that the grayscale level does not need to be reset during the switching between monochrome and color display modes, making the monochrome and white display modes simple.

[0091] S360: Obtain the second image information of the white display screen.

[0092] Specifically, a second image of the white display screen can be obtained by taking a picture of the white display screen on the display panel through the camera unit.

[0093] S370. Determine the second brightness information of the sub-pixel under the at least two second display grayscale levels based on the second image information.

[0094] Specifically, the image brightness can be extracted from the second image information to determine the second brightness information of the sub-pixel under the above-mentioned at least two second display gray levels, thus determining the correspondence between the second display gray levels and the second brightness information.

[0095] S380. Based on the second brightness information and the second display grayscale, the second gamma curve is obtained by fitting using the second preset algorithm.

[0096] Specifically, the second gamma curve can be determined based on the correspondence between the second brightness information and the second display grayscale. For example, the second gamma curve can be obtained by fitting a second preset algorithm, which can be an interpolation method; this embodiment of the invention does not limit this method.

[0097] Furthermore, the first preset algorithm is the same as the second preset algorithm, so the fitting algorithm for the first gamma curve and the second gamma curve is simple, and the first gamma curve and the second gamma curve will not have differences in curve shape due to the different fitting algorithms, thus ensuring that the compensation gray level is accurate when determining the compensation gray level through the first gamma curve and the second gamma curve.

[0098] S390. Determine the first brightness information of the sub-pixels in the center display area of ​​the display panel under monochrome display mode and preset display grayscale, and the second brightness information of the sub-pixels in the center display area of ​​the display panel under white display mode and preset display grayscale.

[0099] S3100: Determine the compensation grayscale of the sub-pixel in monochrome display mode based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve.

[0100] In summary, the above technical solution details how to determine the first gamma curve and the second gamma curve, ensuring that the compensation grayscale can be determined based on the first gamma curve and the second gamma curve. That is, it is determined by combining the compensation data in monochrome display mode and the compensation data in white display mode. This can increase the accuracy of grayscale compensation data and improve the display uniformity of the display panel.

[0101] Based on the above embodiments, since monochrome display modes can include multiple different monochrome display modes such as red display mode, green display mode, and blue display mode, the following will explain how to determine the compensation grayscale in each monochrome display mode. Specifically, Figure 8 This is a flowchart illustrating another grayscale compensation method provided in an embodiment of the present invention, as shown below. Figure 8 As shown, the grayscale compensation method provided in this embodiment of the invention includes:

[0102] S410: Obtain the first gamma curve of the sub-pixel in red display mode, green display mode and blue display mode and the second gamma curve in white display mode respectively.

[0103] Specifically, since monochrome display modes include red, green, and blue display modes, and the first gamma curves of different display modes are different, it is necessary to obtain the first gamma curves of sub-pixels in red, green, and blue display modes separately when obtaining the first gamma curve in monochrome display mode. This allows for grayscale compensation in different monochrome display modes, ensuring good compensation results.

[0104] S420. Determine the first brightness information of the sub-pixels in the center display area of ​​the display panel in red display mode, green display mode and blue display mode, and the second brightness information of the sub-pixels in the center display area of ​​the display panel in white display mode and preset display grayscale.

[0105] Correspondingly, when determining the first brightness information of the sub-pixels of the central county / city area of ​​the display panel in monochrome display mode, it is necessary to determine the first brightness information of the sub-pixels of the central county / city area of ​​the display panel in red display mode, green display mode, and blue display mode respectively. In this way, the compensation grayscale value in different monochrome display modes can be determined based on the first brightness information in different monochrome display modes to ensure good compensation effect.

[0106] S430: Determine the compensation grayscale of the sub-pixel in the red display mode based on the first brightness information of the sub-pixel in the red display mode, the first gamma curve of the sub-pixel in the red display mode, the second brightness information, and the second gamma curve.

[0107] S440. Determine the compensation grayscale of the sub-pixel in the green display mode based on the first brightness information of the sub-pixel in the green display mode, the first gamma curve of the sub-pixel in the red display mode, the second brightness information, and the second gamma curve.

[0108] S450: Determine the compensation grayscale of the sub-pixel in the blue display mode based on the first brightness information of the sub-pixel in the blue display mode, the first gamma curve of the sub-pixel in the blue display mode, the second brightness information, and the second gamma curve.

[0109] Specifically, the compensation grayscale of the sub-pixel in the red display mode is determined based on the first brightness information and the first gamma curve of the sub-pixel in the red display mode, and the second brightness information and the second gamma curve in the white display mode, so as to ensure that the compensation amount corresponds to the display mode and improve the compensation accuracy.

[0110] Similarly, the compensation grayscale of the sub-pixel in the green display mode is determined based on the first brightness information and the first gamma curve of the sub-pixel in the green display mode, and the second brightness information and the second gamma curve in the white display mode, so as to ensure that the compensation amount corresponds to the display mode and improve the compensation accuracy.

[0111] Similarly, the compensation grayscale of the sub-pixel in the blue display mode is determined based on the first brightness information and the first gamma curve of the sub-pixel in the blue display mode, and the second brightness information and the second gamma curve in the white display mode, to ensure that the compensation amount corresponds to the display mode and improve the compensation accuracy.

[0112] In summary, grayscale compensation in different monochrome display modes is achieved based on compensation data from each monochrome display mode, with high compensation accuracy.

[0113] Based on the above embodiments, Figure 9 This is a schematic flowchart of another grayscale compensation method provided in an embodiment of the present invention. Figure 9 The grayscale compensation method shown above, based on the above embodiments, explains how to determine the first brightness information of the sub-pixels in the center display area of ​​the display panel under monochrome display mode and preset display grayscale, and the second brightness information under white display mode and preset display grayscale. Combined with... Figure 1 and Figure 9 As shown, the central display area of ​​the display panel includes multiple sub-pixels, such as... Figure 1 As shown by the dashed line in the figure, the grayscale compensation method provided in this embodiment of the invention includes:

[0114] S510: Obtain the first gamma curve of the subpixel in monochrome display mode and the second gamma curve in white display mode.

[0115] S520: Determine multiple first actual brightness information of multiple sub-pixels in the central display area of ​​the display panel under monochrome display mode and preset display grayscale, and multiple second actual brightness information of multiple sub-pixels in the central display area of ​​the display panel under white display mode and preset display grayscale.

[0116] Specifically, a monochrome display and a white display can be displayed on the display panel, and a camera unit can take pictures of the monochrome display and the white display displayed on the display panel to determine multiple first actual brightness information of multiple sub-pixels in the central display area under monochrome display mode and preset display grayscale, as well as multiple second actual brightness information of multiple sub-pixels in the central display area of ​​the display panel under white display mode and preset display grayscale.

[0117] S530. Determine the first average brightness information of multiple sub-pixels in the central display area of ​​the display panel under monochrome display mode and preset display grayscale based on multiple first actual brightness information, and determine the second average brightness information of multiple sub-pixels in the central display area of ​​the display panel under monochrome display mode and preset display grayscale based on multiple second actual brightness information.

[0118] S540. Use the first average brightness information as the first brightness information and the second average brightness information as the second brightness information.

[0119] Specifically, the first average brightness information of multiple sub-pixels in the central display area of ​​the display panel under monochrome display mode and preset grayscale can be determined based on multiple first actual brightness information. The second average brightness information of multiple sub-pixels in the central display area of ​​the display panel under monochrome display mode and preset grayscale can be determined based on multiple second actual brightness information. The first average brightness information is more accurate than the first actual brightness information of a single sub-pixel, avoiding the problem of large errors in single brightness values. Similarly, the second average brightness information is more accurate than the second actual brightness information of a single sub-pixel, avoiding the problem of large errors in single brightness values.

[0120] S550: Determine the compensation grayscale of the sub-pixel in monochrome display mode based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve.

[0121] In summary, using the average brightness of multiple sub-pixels in the central display area as the brightness information of the central display area can ensure more accurate brightness information, avoid the problem of large errors in a single brightness level, and improve the accuracy of subsequent grayscale compensation.

[0122] Based on the same inventive concept, embodiments of the present invention provide a grayscale compensation device for a display panel. This grayscale compensation device is used to execute the grayscale compensation method for a display panel provided in any embodiment of the present invention. The grayscale compensation device for a display panel can be implemented by software and / or hardware. Therefore, the grayscale compensation device for a display panel provided in embodiments of the present invention includes the technical features of the grayscale compensation method for a display panel provided in any embodiment of the present invention, and can achieve the beneficial effects of the grayscale compensation method for a display panel provided in any embodiment of the present invention. Similarities can be referred to the above description of the grayscale compensation method for a display panel provided in embodiments of the present invention, and will not be repeated here.

[0123] refer to Figure 1 The display panel 100 includes sub-pixels 110 arranged in an array. Figure 10 This is a structural schematic diagram of a grayscale compensation device for a display panel provided in an embodiment of the present invention, in conjunction with reference to the reference. Figure 1 and Figure 10The grayscale compensation device of the display panel includes a gamma curve acquisition module 10, used to acquire a first gamma curve of a sub-pixel in monochrome display mode and a second gamma curve in white display mode; a brightness information determination module 20, used to determine the first brightness information of a sub-pixel in the center display area of ​​the display panel in monochrome display mode and a preset display grayscale, and the second brightness information of a sub-pixel in the center display area of ​​the display panel in white display mode and a preset display grayscale; and a compensation grayscale determination module 30, used to determine the compensation grayscale of a sub-pixel in monochrome display mode based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve.

[0124] The grayscale compensation device for the display panel provided in this embodiment of the invention compensates the grayscale of sub-pixels in monochrome display mode by using compensation data in monochrome display mode and compensation data in white display mode. This can increase the accuracy of grayscale compensation data and improve the display uniformity of the display panel.

[0125] Based on the same inventive concept, embodiments of the present invention provide a display device. Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention, such as... Figure 11 As shown, the display device 1 includes a display panel 100 and a driver chip 200. The display panel 100 includes a display area A1 and a non-display area A2 surrounding the display area A1. The display area A1 includes a plurality of sub-pixels 110 arranged in an array. The non-display area A2 includes a chip setting area A21. The driver chip 200 is disposed in the chip setting area A21. The driver chip 200 is used to execute the grayscale compensation method of the display panel provided in any embodiment of the present invention to determine the compensation grayscale of the sub-pixels in monochrome display mode. Therefore, the technical features of the grayscale compensation method of the display panel provided in the embodiments of the present invention can be applied to the display device provided in the embodiments of the present invention, and can achieve the beneficial effects of the grayscale compensation method of the display panel provided in any embodiment of the present invention. The similarities can be referred to the above description of the grayscale compensation method of the display panel provided in the embodiments of the present invention, and will not be repeated here.

[0126] This invention also provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the grayscale compensation method for a display panel provided in any embodiment of this invention.

[0127] The computer instructions for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to a processor in a driver chip such that, when executed by the processor, the computer instructions cause the functions / operations specified in the flowcharts and / or block diagrams to be performed.

[0128] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store computer instructions for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0129] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0130] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A gray scale compensation method of a display panel, characterized by, The display panel includes multiple sub-pixels, and the grayscale compensation method includes: Obtain the first gamma curve of the sub-pixel in monochrome display mode and the second gamma curve in white display mode; Determine the first brightness information of the sub-pixels in the center display area of ​​the display panel under the monochrome display mode and the preset display grayscale, and the second brightness information of the sub-pixels in the center display area of ​​the display panel under the white display mode and the preset display grayscale; The compensation grayscale of the sub-pixel in the monochrome display mode is determined based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve. Determining the compensation grayscale of the sub-pixel in the monochrome display mode based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve includes: The first compensated grayscale component of the sub-pixel in the monochrome display mode is determined based on the first brightness information and the first gamma curve. The second compensated grayscale component of the sub-pixel in the monochrome display mode is determined based on the second brightness information and the second gamma curve. The compensation gray level of the sub-pixel in monochrome display mode is determined based on the first compensation gray level component and the second compensation gray level component.

2. The gray scale compensation method of claim 1, wherein, Determining the first compensated grayscale component of the sub-pixel in monochrome display mode based on the first brightness information and the first gamma curve includes: The first adjusted gray level is determined based on the first brightness information and the first gamma curve; The first compensated grayscale component of the sub-pixel in monochrome display mode is determined based on the first adjusted grayscale, the preset display grayscale, and the first compensation coefficient; wherein, the first compensated grayscale component Δgray1, the first adjusted grayscale gray1, the preset display grayscale grayN, and the first compensation coefficient K1 satisfy Δgray1 = K1 * (gray1 - grayN), where 0 ≤ K1 < 1. Determining the second compensated grayscale component of the sub-pixel in monochrome display mode based on the second brightness information and the second gamma curve includes: The second adjusted grayscale is determined based on the second brightness information and the second gamma curve; The second compensated grayscale component of the sub-pixel in monochrome display mode is determined based on the second adjusted grayscale, the preset display grayscale, and the second compensation coefficient; wherein, the second compensated grayscale component Δgray2, the second adjusted grayscale gray2, the preset display grayscale grayN, and the second compensation coefficient K2 satisfy Δgray2 = K2 * (gray2 - grayN), where 0 <K2≤1; Determining the compensation grayscale of the sub-pixel in monochrome display mode based on the first compensation grayscale component and the second compensation grayscale component includes: The compensation gray level of the sub-pixel in monochrome display mode is determined by summing the first compensation gray level component and the second compensation gray level component; wherein the compensation gray level Δgray, the first compensation gray level component Δgray 1 and the second compensation gray level component Δgray 2 satisfy Δgray=Δgray 1+Δgray 2, and K1+K2=1.

3. The gray scale compensation method of claim 1, wherein, Obtaining the first gamma curve of the sub-pixel in monochrome display mode includes: The display panel is controlled to display at least two monochrome display images at a first display grayscale level; Obtain the first image information of the monochrome display screen; The first brightness information of the sub-pixel under the at least two first display grayscale levels is determined based on the first image information; Based on the first brightness information and the first display grayscale, the first gamma curve is obtained by fitting using a first preset algorithm. Obtaining the second gamma curve of the sub-pixel in white display mode includes: The display panel is controlled to display at least two white display images under the second display grayscale; Obtain the second image information of the white display screen; The second brightness information of the sub-pixel under the at least two second display grayscale levels is determined based on the second image information; The second gamma curve is obtained by fitting the second brightness information and the second display grayscale using a second preset algorithm.

4. The gray scale compensation method of claim 3, wherein, The first display grayscale and the second display grayscale are the same; The first preset algorithm is the same as the second preset algorithm.

5. The gray scale compensation method of claim 1, wherein, Obtaining the first gamma curve of the sub-pixel in monochrome display mode includes: The first gamma curves of the sub-pixel in red display mode, green display mode, and blue display mode are obtained respectively; Determining the first brightness information of the sub-pixels in the center display area of ​​the display panel under the monochrome display mode and the preset display grayscale includes: The first brightness information of the sub-pixels in the central display area of ​​the display panel is determined in red display mode, green display mode, and blue display mode, respectively; Determining the compensation grayscale of the sub-pixel in the monochrome display mode based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve includes: The compensation grayscale of the sub-pixel in the red display mode is determined based on the first brightness information of the sub-pixel in the red display mode, the first gamma curve of the sub-pixel in the red display mode, the second brightness information, and the second gamma curve. The compensation grayscale of the sub-pixel in the green display mode is determined based on the first brightness information of the sub-pixel in the green display mode, the first gamma curve of the sub-pixel in the green display mode, the second brightness information, and the second gamma curve. The compensation grayscale of the sub-pixel in the blue display mode is determined based on the first brightness information of the sub-pixel in the blue display mode, the first gamma curve of the sub-pixel in the blue display mode, the second brightness information, and the second gamma curve.

6. The gray scale compensation method of claim 1, wherein, The central display area includes a plurality of the sub-pixels; Determining the first brightness information of the sub-pixels in the center display area of ​​the display panel under monochrome display mode and preset display grayscale, and the second brightness information of the sub-pixels in the center display area of ​​the display panel under white display mode and the preset display grayscale, includes: Determine multiple first actual brightness information of multiple sub-pixels in the central display area of ​​the display panel under monochrome display mode and preset display grayscale, and multiple second actual brightness information of multiple sub-pixels in the central display area of ​​the display panel under white display mode and preset display grayscale; The first average brightness information of multiple sub-pixels in the central display area of ​​the display panel under monochrome display mode and preset display grayscale is determined based on multiple first actual brightness information, and the second average brightness information of multiple sub-pixels in the central display area of ​​the display panel under monochrome display mode and preset display grayscale is determined based on multiple second actual brightness information. The first average brightness information is used as the first brightness information, and the second average brightness information is used as the second brightness information.

7. A grayscale compensation device for a display panel, characterized in that, The display panel includes multiple sub-pixels, and the grayscale compensation device includes: The gamma curve acquisition module is used to acquire the first gamma curve of the sub-pixel in monochrome display mode and the second gamma curve in white display mode. A brightness information determination module is used to determine the first brightness information of the sub-pixels in the center display area of ​​the display panel under the monochrome display mode and the preset display grayscale, and the second brightness information of the sub-pixels in the center display area of ​​the display panel under the white display mode and the preset display grayscale; The grayscale compensation determination module is used to determine the grayscale compensation of the sub-pixel in the monochrome display mode based on the first brightness information, the first gamma curve, the second brightness information, and the second gamma curve. The compensation grayscale determination module is specifically used to determine the first compensation grayscale component of the sub-pixel in the monochrome display mode based on the first brightness information and the first gamma curve. The second compensated grayscale component of the sub-pixel in the monochrome display mode is determined based on the second brightness information and the second gamma curve. The compensation gray level of the sub-pixel in monochrome display mode is determined based on the first compensation gray level component and the second compensation gray level component.

8. A display device, characterized by comprising: include: Display panel and driver chip; The display panel includes a display area and a non-display area surrounding the display area; The display area includes multiple sub-pixels arranged in an array; the non-display area includes a chip mounting area; the driving chip is disposed in the chip mounting area; The driving chip is used to execute the grayscale compensation method of the display panel according to any one of claims 1-6, so as to determine the compensation grayscale of the sub-pixel in monochrome display mode.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that are used to cause a processor to execute the grayscale compensation method of the display panel according to any one of claims 1-6.

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