Display demura method for display panel, display panel, and display device

Abstract

Disclosed in embodiments of the present invention are a display demura method for a display panel, a display panel, and a display device. The display demura method comprises: controlling a display panel to display at least two test pictures, the at least two test pictures comprising different forms of display mura; using a camera to capture the test pictures so as to acquire capturing data of the at least two test pictures; processing the capturing data of the at least two test pictures to form a display demura image comprising at least two forms; and when the display panel performs display, performing display demura on the basis of the display demura image. The embodiments of the present invention achieve dynamic compensation for display mura of different forms of high and low gray scales, thereby improving the display demura effect of the display panel, and enhancing product competitiveness.

Description

A method for compensating for uneven display in a display panel, a display panel, and a display device.

[0001] This invention claims priority to Chinese Patent Application No. 202410822983.0, filed with the State Intellectual Property Office of China on June 24, 2024, entitled “A method for compensating for uneven display of a display panel, a display panel and a display device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of display technology, and more particularly to a method for compensating for uneven display in a display panel, a display panel, and a display device. Background Technology

[0003] During the manufacturing process of display panels, due to factors such as materials and processes, there are differences in the light-emitting elements of the display panel, which leads to the phenomenon of display unevenness (Mura) during the display process. In order to improve the display effect, display unevenness compensation (Demura) technology is usually used to compensate for the brightness differences between pixels.

[0004] The current Demura technology first uses a high-resolution industrial camera to take pictures to obtain pixel brightness data at a certain brightness and gray level, and then calculates the compensation coefficient. Other gray levels are calculated using interpolation, and then corresponding compensation is performed according to the compensation coefficient. Since there may be at least two display unevennesses in different display images, the compensation effect of the existing Demura technology needs to be improved.

[0005] Therefore, it is necessary to propose a Demura improvement technology to enhance the display unevenness compensation effect of the display panel.

[0006] Summary of the Invention

[0007] This invention provides a method for compensating for uneven display in a display panel, a display panel, and a display device to improve the effect of compensating for uneven display in a display panel.

[0008] In a first aspect, embodiments of the present invention provide a method for compensating for uneven display on a display panel, comprising:

[0009] The control display panel displays at least two test screens, and the at least two test screens include different forms of uneven display;

[0010] Use a camera to capture the test images and obtain capture data from at least two of the test images;

[0011] The captured data from at least two of the test images are processed to form a display unevenness compensation image that includes at least two forms.

[0012] When the display panel is in use, uneven display compensation is performed according to the uneven display compensation diagram.

[0013] Secondly, embodiments of the present invention also provide a display panel, wherein the display panel employs the above-mentioned display unevenness compensation method to improve display uniformity during display.

[0014] Thirdly, embodiments of the present invention also provide a display device, including the display panel described above.

[0015] The display unevenness compensation method for a display panel provided in this embodiment of the invention first controls the display panel to display at least two test images, each of which includes different forms of display unevenness; then, a camera is used to capture images of the test images, acquiring capture data for the at least two test images; the capture data for the at least two test images is then processed to form a display unevenness compensation image including at least two forms, and the compensation image containing various display unevenness is stored in the memory of the display panel; when the display panel is displaying, different display unevenness compensation images are extracted according to the form of display unevenness, realizing dynamic compensation for different forms of display unevenness at high and low gray levels, improving the display unevenness compensation effect of the display panel, and enhancing product competitiveness. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0017] Figure 2 is a flowchart illustrating a method for compensating for uneven display of a display panel according to an embodiment of the present invention;

[0018] Figure 3 is a schematic diagram of a display panel displaying a first test screen according to an embodiment of the present invention;

[0019] Figure 4 is a schematic diagram of a display panel displaying a second test screen according to an embodiment of the present invention;

[0020] Figure 5 is a schematic diagram of a display panel displaying a third test screen according to an embodiment of the present invention;

[0021] Figure 6 is a schematic diagram of a process for acquiring test image capture data according to an embodiment of the present invention;

[0022] Figure 7 is a schematic flowchart illustrating the unevenness compensation process provided in an embodiment of the present invention;

[0023] Figure 8 is a flowchart illustrating another method for compensating for uneven display of a display panel provided in an embodiment of the present invention;

[0024] Figure 9 is a schematic diagram of another display panel provided by the present invention;

[0025] Figure 10 is a schematic diagram of another display panel provided in an embodiment of the present invention;

[0026] Figure 11 is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0028] The terminology used in the embodiments of this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. It should be noted that directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this invention are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this invention. Furthermore, in the context, it should be understood that when referring to an element being formed "upper" or "lower" of another element, it can be formed not only directly "upper" or "lower" of the other element, but also indirectly "upper" or "lower" of the other element through an intermediate element. The terms "first," "second," etc., are used for descriptive purposes only and do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Existing Demura technology typically includes the following steps: A display panel is placed on a Demura site machine; the display panel is controlled to display a preset test image; an industrial camera is used to photograph the display panel to obtain brightness data at different locations; then, the Demura algorithm is called to calculate compensation data; the compensation data is processed into a bin or hex file and burned into the external flash memory chip (Flash IC) of the main flexible circuit board (FPC) of the display panel module; during Demura operation, the compensation data is loaded into the memory of the display driver chip (DDIC), and combined with a lookup table of display unevenness compensation coefficients (gain) values, gains are applied at nodes with different refresh rates (FPS), different maximum brightness (DBV), and different gray levels (Gray); the compensation values ​​between nodes are obtained through linear interpolation.

[0030] In the aforementioned technology, the Flash IC typically stores only a basic grayscale (e.g., 500 nit brightness, 32 grayscale levels) display unevenness compensation map. Other grayscale levels of other DBVs are calculated by interpolation based on the display unevenness compensation map of the basic grayscale. However, in the display panel, the mura morphology of different grayscale levels of different DBVs varies. Storing a single display unevenness compensation map cannot be applicable to all situations. If multiple display unevenness compensation maps are stored, they require a large amount of storage space. Due to limitations such as limited storage space, multiple display unevenness compensation maps need to be compressed during storage, which may result in spot-like mura.

[0031] Based on this, embodiments of the present invention provide a method for compensating for display unevenness in a display panel. The method first controls the display panel to display at least two test images, the at least two test images including different forms of display unevenness; then, a camera is used to capture the test images to obtain the capture data of at least two test images; then, the capture data of at least two test images is processed to form a display unevenness compensation map including at least two forms; when the display panel is displaying, display unevenness compensation is performed according to the display unevenness compensation map.

[0032] By using the above-mentioned uneven display compensation method, it is possible to dynamically compensate for uneven display in different forms of high and low gray levels, improve the uneven display compensation effect of the display panel, and enhance product competitiveness.

[0033] The above is the core idea of ​​this invention. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] Figure 1 is a schematic diagram of a display panel provided in an embodiment of the present invention. Referring to Figure 1, the present invention provides a display panel that improves display uniformity by employing any of the display unevenness compensation methods provided in the present invention during display.

[0035] Specifically, referring to Figure 1, the display panel 10 may include an organic light-emitting diode (OLED) display panel, an active-matrix organic light-emitting diode (AMOLED) display panel, a quantum dot light-emitting diode (QLED) display panel, a light-emitting diode (LED) display panel, a micro light-emitting diode (Micro LED) display panel, a mini light-emitting diode (Mini LED) display panel, etc. The embodiments of the present invention do not impose specific limitations on the type of display panel 10.

[0036] The display panel 10 includes a display area AA and a non-display area NA. The display area AA contains multiple sub-pixels 100 and is used to display images. The non-display area NA contains source drive circuits, gate drive circuits, and other structures. For example, only three sub-pixels 100 are shown in Figure 1; other sub-pixels 100 are not shown here.

[0037] It should be noted that the display panel 10 provided in this embodiment of the invention also includes other film layer areas below the display area AA, such as a substrate and a sub-pixel driving circuit layer (not shown in Figure 1). The sub-pixel driving circuit can be a 2T1C (2 transistors and 1 capacitor), 4T1C, 7T1C, 7T2C, 8T1C, 8T2C, etc. The sub-pixel driving circuit includes multiple thin film transistors (TFTs), storage capacitors, and metal traces, etc., to provide driving current to the sub-pixel 100 to drive the sub-pixel 100 to emit light. The film layer structures of the sub-pixel driving circuit are not shown one by one in this embodiment of the invention.

[0038] Figure 2 is a flowchart illustrating a display panel unevenness compensation method according to an embodiment of the present invention. Referring to Figure 2, the display panel unevenness compensation method provided in this embodiment of the present invention includes:

[0039] S110, The control display panel displays at least two test screens, and the at least two test screens include different forms of uneven display.

[0040] Specifically, in two different test screens, at least one of the three parameters—brightness, grayscale, and refresh rate—is different, resulting in different forms of display unevenness. A single test screen may include one type of display unevenness or at least two types, depending on the actual test screen. For example, on a certain display panel, displaying a low-brightness, low-grayscale test screen may produce orange peel-like unevenness and vertical stripe-like unevenness. Displaying a high-grayscale white screen may produce vertical stripe-like unevenness, as well as issues with display uniformity. Orange peel-like unevenness refers to unevenness with an interlaced texture resembling orange peel, while vertical stripe-like unevenness refers to striped textures, typically vertical (parallel to the long side when the display area of ​​the display panel is rectangular).

[0041] Optionally, the control display panel can display at least two test screens, including:

[0042] The control display panel displays at least two of the following: a first test image with a first brightness and a first grayscale, a second test image with a second brightness and a first grayscale, and a white test image with a second brightness and a second grayscale; wherein the first brightness is less than the second brightness, and the first grayscale is less than the second grayscale.

[0043] Understandably, through experimental testing, the inventors discovered that current display panels simultaneously suffer from the following problems: when displaying a low-brightness test image with 2 nits brightness and 32 gray levels (2nit L32), there are orange-striped and vertical-striped display unevenness; when displaying a mid-brightness test image with 500 nits brightness and 32 gray levels (500nit L32), only vertical-striped display unevenness exists; and when displaying a white test image with 500 nits brightness and 255 gray levels (500nit W255), there are issues with both vertical-striped display unevenness and white light brightness uniformity. Based on this, in one embodiment, optionally, the first brightness is set to 2 nits, the second brightness to 500 nits, the first gray level to 32 gray levels, and the second gray level to 255 gray levels. That is, the first test image is a low-brightness test image with 2 nits L32, the second test image is a mid-brightness test image with 500 nits L32, and the third test image is a white test image with 500 nits W255.

[0044] Optionally, the first test screen includes a first type of uneven display and a second type of uneven display, the second test screen includes a second type of uneven display, and the white test screen includes a second type of uneven display and a third type of uneven display.

[0045] Optionally, the first type of display non-uniformity is orange peel-like display non-uniformity, the second type of display non-uniformity is straight stripe-like display non-uniformity, and the third type of display non-uniformity is brightness uniformity-like display non-uniformity.

[0046] For example, Figure 3 is a schematic diagram of a display panel displaying a first test screen according to an embodiment of the present invention; Figure 4 is a schematic diagram of a display panel displaying a second test screen according to an embodiment of the present invention; and Figure 5 is a schematic diagram of a display panel displaying a third test screen according to an embodiment of the present invention. Referring to Figures 3 to 5, Figure 3 is an image taken by a camera of a display panel displaying a first test screen of 2 nit L32, which exhibits orange peel-like unevenness and vertical stripe-like unevenness; Figure 4 is an image taken by a camera of a display panel displaying a second test screen of 500 nit L32, which exhibits vertical stripe-like unevenness; and Figure 5 is an image taken by a camera of a second test screen of 500 nit W255, which exhibits vertical stripe-like unevenness and unevenness in display uniformity. In specific implementations, the display panel can be controlled to display the first test screen and the second test screen, the first test screen and the third test screen, the second test screen and the third test screen, or the first test screen, the second test screen, and the third test screen. The specific implementation can be selected according to the actual situation.

[0047] S120. Use a camera to capture test images and obtain shooting data for at least two test images.

[0048] The camera used to capture the test images can be a high-resolution, high-precision industrial camera. In specific implementations, a charge-coupled device (CCD) camera or a complementary metal-oxide-semiconductor (CMOS) camera can be used to capture pixel-level images of the light-emitting elements and obtain their brightness. For example, Figures 3 to 5 show 1240×2772 pixel images of a display panel captured by the camera.

[0049] Figure 6 is a schematic flowchart of acquiring test screen capture data according to an embodiment of the present invention. Referring to Figure 6, optionally, a camera is used to capture test screens, and capture data of at least two test screens is acquired, including:

[0050] S121. Control the display panel to display the first test screen, and use the camera to capture the first image of the first test screen.

[0051] In specific implementation, the order of the test screens may not be limited. The first test screen may be the first test screen, the second test screen or the third test screen described above, or according to the requirements of the actual display panel, other test screens may be adopted, and the embodiments of the present invention do not limit this. When the first test screen is the first test screen, the first image of the first test screen is captured by a camera as shown in Figure 3; when the first test screen is the second test screen, the first image of the first test screen is captured by a camera as shown in Figure 4; when the first test screen is the third test screen, the first image of the first test screen is captured by a camera as shown in Figure 5. The first test screen may also adopt other test screens with other brightness and other gray levels, as long as at least one display unevenness phenomenon is ensured in the test screen.

[0052] S122. Control the display panel to display the i-th test screen, and capture the i-th image of the i-th test screen by a camera.

[0053] S123. Control the display panel to display the n-th test screen, and capture the n-th image of the n-th test screen by a camera.

[0054] Among them, 1 < i ≤ n ≤ 2, and both i and n are integers. It can be understood that in specific implementation, the display panel can be controlled to display multiple test screens, and the display panel is sequentially controlled to display the 1st test screen, the 2nd test screen,..., the i-th test screen, the i + 1-th test screen,..., the n - 1-th test screen, the n-th test screen, and at the same time, the camera is used to capture the test screens to obtain the corresponding images.

[0055] In a certain embodiment, optionally, n = 3, and the 3 test screens can be the aforementioned first test screen (2nitL32), the second test screen (500nitL32) and the third test screen (500nitW255) respectively. These three test screens include orange pattern type display unevenness, vertical pattern type display unevenness and display uniformity type display unevenness. After subsequent data processing, a compensation map including orange pattern, vertical pattern and display uniformity can be generated by fitting these 3 test screens, which is used in the display unevenness compensation process to improve the compensation effect.

[0056] S124. Store the data corresponding to the n images to obtain the shooting data of the n test screens.

[0057] Among them, the image data captured by the camera can be data in csv format, and the data captured by the camera can be stored in an external memory to be provided for subsequent processing.

[0058] S130. Process the shooting data of at least two test screens to form a display unevenness compensation map including at least two forms.

[0059] For example, if the captured data of the first test screen and the second test screen are processed, a display unevenness compensation map including orange peel and vertical stripes can be formed; if the captured data of the first test screen and the third test screen are processed, a display unevenness compensation map including orange peel, vertical stripes and white light display uniformity can be formed; if the captured data of the second test screen and the third test screen are processed, a display unevenness compensation map including vertical stripes and white light display uniformity can be formed; if the captured data of the first test screen, the second test screen and the third test screen are processed, a display unevenness compensation map including orange peel, vertical stripes and white light display uniformity can be formed. In some display panel applications, the number of test screens can be selected according to the actual situation.

[0060] Taking the control panel displaying three test screens as an example, optionally, the control panel displays at least two test screens, including:

[0061] The display panel is controlled to show the first test screen, the second test screen, and the white test screen respectively.

[0062] The first test screen is the 2nit L32 test screen, the second test screen is the 500nit L32 test screen, and the white test screen is the 500nit W255 test screen. These three display screens show orange stripes, vertical stripes, and uneven white display uniformity.

[0063] Data from at least two test images are processed to create a display unevenness compensation map that includes at least two different forms, including:

[0064] Obtain the display unevenness type in the first test screen, the second test screen, and the white test screen.

[0065] The first test image exhibits orange stripes and vertical stripes, the second test image exhibits vertical stripes, and the white test image exhibits both vertical stripes and uniformity. The classification can be achieved by visually or through machine recognition of the corresponding photographs.

[0066] By merging data corresponding to the same type of display unevenness, a display unevenness compensation map is obtained that includes data of at least two types of display unevenness.

[0067] Optionally, the first test screen includes a first type of display unevenness and a second type of display unevenness, the second test screen includes a second type of display unevenness, and the white test screen includes a second type of display unevenness and a third type of display unevenness; the first type of display unevenness is stored as image A in the display unevenness compensation image, the second type of display unevenness is stored as image B in the display unevenness compensation image, and the third type of display unevenness is stored as image C in the display unevenness compensation image.

[0068] Specifically, in the three test screens, the first type of uneven display exists only in the first test screen; therefore, all the data in Figure A comes from the data of the image corresponding to the first test screen. The second type of uneven display exists in the first, second, and third test screens; therefore, the data in Figure B comes from the data of the images corresponding to the first, second, and third test screens. The third type of uneven display exists only in the third test screen; therefore, the data in Figure C comes only from the data of the image corresponding to the third test screen. The specific data processing method can refer to the algorithms in existing Demura technology; this embodiment of the invention does not limit it in this way.

[0069] S140. When displaying on the display panel, perform display unevenness compensation according to the display unevenness compensation diagram.

[0070] In this embodiment, after obtaining display unevenness compensation maps including multiple types of display unevenness, different compensation maps are extracted according to the different Mura shapes of the display screen during the display process of the display panel. This achieves dynamic compensation of different Mura shapes of high and low gray levels, improves the visual effect of product Mura, and enhances product competitiveness.

[0071] Figure 7 is a flowchart illustrating a display unevenness compensation process according to an embodiment of the present invention. Referring to Figure 7, optionally, when displaying on the display panel, display unevenness compensation is performed based on the display unevenness compensation diagram, including:

[0072] S141. Obtain the display unevenness type of the screen to be displayed.

[0073] Under different DBV conditions, the type of display unevenness at the same grayscale varies. For example, at a lower DBV, the brightness of each grayscale is lower, resulting in a higher proportion of orange-line unevenness, a lower proportion of vertical line unevenness, and even less or no white light unevenness. At a higher DBV, the brightness of each grayscale is higher, resulting in a higher proportion of white light unevenness, a lower proportion of vertical line unevenness, and even less or no orange-line unevenness. At a medium DBV and medium grayscale, there may only be vertical line unevenness. The specific type of display unevenness corresponding to the displayed image can be pre-defined. Different display unevenness types may also exist under different refresh rates, and can be calibrated according to requirements during implementation.

[0074] S142. Determine the unevenness compensation value of the display screen to be displayed based on y = x1A + ​​x2B + x3C.

[0075] Where y represents the display unevenness compensation value, and x1, x2, and x3 are all constants between 0 and 1. The display unevenness compensation value refers to the difference between the actual display brightness and the desired display brightness, usually represented by offset. Specifically, it can be the brightness deviation of a single sub-pixel, or the average deviation of a display area including multiple sub-pixels, which can be selected according to the actual situation during implementation. A filtering device can be set in the driver chip of the display panel to calculate x1, x2, and x3. For example, when the display unevenness compensation accuracy requirement is high, it can be applied to a single sub-pixel or a few sub-pixels with a small area; when the display unevenness compensation accuracy requirement is low, it can be applied to multiple sub-pixels with a larger area. This helps to reduce hardware requirements and costs.

[0076] S143. Determine the display unevenness compensation coefficient based on the display unevenness compensation value.

[0077] Since the actual screen to be displayed is often different from the test screen, the display unevenness compensation value offset of the screen to be displayed is not the same as the display unevenness compensation value offset0 saved in the display unevenness compensation diagram. The display unevenness compensation coefficient is gain, and offset = gain × offset0.

[0078] S144. Load the display unevenness compensation coefficient into the display area to achieve display unevenness compensation.

[0079] By combining the display non-uniformity compensation coefficient and the display non-uniformity compensation diagram, the compensated signal is applied to the corresponding light-emitting element to achieve display non-uniformity compensation.

[0080] Figure 8 is a flowchart illustrating another method for compensating for uneven display of a display panel according to an embodiment of the present invention. Referring to Figure 8, the method for compensating for uneven display of a display panel according to an embodiment of the present invention includes:

[0081] S210, The control display panel displays at least two test screens, and the at least two test screens include different forms of uneven display.

[0082] S220: Use a camera to capture test images and obtain capture data from at least two test images.

[0083] S230: Process the shooting data of at least two test screens to form a display unevenness compensation map including at least two forms.

[0084] S240. When displaying on the display panel, perform display unevenness compensation according to the display unevenness compensation diagram.

[0085] S250. Test the compensated display screen. If uneven display still exists, adjust at least one of x1, x2 and x3 to perform uneven display compensation again until the compensation requirements are met.

[0086] Specifically, a camera can be used to take pictures of the compensated display to determine whether the compensated display unevenness meets the requirements. If it does not meet the requirements, the size of at least one of x1, x2 and x3 can be adjusted once or multiple times according to the needs, and the display unevenness compensation can be performed again until the display uniformity requirements are met.

[0087] In another embodiment, applying the same gain to the entire display panel may not achieve a good compensation effect, and the Mura phenomenon of the display panel remains relatively severe. Therefore, optionally, the display area of ​​the display panel is divided into at least two sub-display areas, each corresponding to a different display unevenness compensation map. Then, different gain values ​​are assigned to each sub-display area to address complex display requirements, thereby improving the display unevenness phenomenon of the display panel.

[0088] Figure 9 is a schematic diagram of another display panel structure provided by the present invention. Referring to Figure 9, the display area AA is pre-divided into at least two sub-display areas. For example, as shown in Figure 9, the display area AA can be divided into 9 sub-display areas according to the long side (Y direction) and the short side (X direction), such as the first sub-display area V1, the second sub-display area V2, the third sub-display area V3, the fourth sub-display area V4, the fifth sub-display area V5, the sixth sub-display area V6, the seventh sub-display area V7, the eighth sub-display area V8, and the ninth sub-display area V9.

[0089] The number of sub-pixels in each sub-display area can be the same or different; the number of sub-pixels in each sub-display area can be one or more. When the number of sub-pixels in a sub-display area is one, the embodiments of the present invention can also compensate for the display brightness of a single sub-pixel to achieve precise compensation for display brightness at the sub-pixel level.

[0090] Specifically, when controlling the display panel to display the test screen, the display status of each sub-display area is tested, and the test data corresponding to each sub-display area is obtained and saved as a display unevenness compensation map including multiple areas. Then, the difference between the actual brightness value and the target brightness value in each sub-display area is calculated, and the display unevenness compensation coefficient corresponding to each sub-display area is set according to the difference of each sub-display area. For example, refer to Table 1.

[0091] Table 1 shows the display unevenness compensation coefficient (gain) for each sub-display area.

[0092] Among them, gain1 to gain9 are not completely the same or different, and the values ​​of gain1 to gain9 are adjusted adaptively according to the display effect of display panel 10; the display unevenness compensation coefficient gain corresponding to each sub-display area can be the average value of the display unevenness compensation coefficients corresponding to all sub-pixels in the sub-display area.

[0093] When the display panel 10 is displaying normally, the sub-pixel driving circuit of the display panel 10 provides driving current to the sub-pixels in the display area AA, and loads the display unevenness compensation coefficient gain of each sub-display area to the corresponding sub-display area, and the sub-pixels in the display area AA are lit. By setting the display unevenness compensation coefficient gain of each sub-display area in the display area AA differently, and using different or different gain values ​​for brightness compensation on the whole surface, more refined display unevenness compensation can be achieved, making the brightness of the entire display area AA uniform, thereby improving the phenomenon of display unevenness of the display panel.

[0094] In summary, the display unevenness compensation method for display panels provided in this embodiment of the invention divides the display area into multiple regions, each of which can be assigned a different gain value. Different regions can obtain different compensation intensities, thereby reducing the differences after different display forms or different degrees of Mura compensation, so as to meet complex display requirements and improve the phenomenon of display unevenness of display panels.

[0095] Based on the above embodiments, the sub-display areas may not be completely identical when divided. Figure 10 is a schematic diagram of another display panel structure provided by an embodiment of the present invention. Referring to Figure 10, the display area can also be divided into multiple arrayed sub-display areas, with at least two sub-display areas having different areas.

[0096] Specifically, referring to Figure 10, in some embodiments, the display area AA can be divided into multiple sub-display areas arranged in an array, each sub-display area having a different area. For example, the display area AA can be divided into nine sub-display areas of different areas, V1 to V9. The number of sub-pixels within the nine sub-display areas can be the same or different.

[0097] Based on the same inventive concept, this invention also provides a display device, including the display panel provided in the above embodiments. FIG1 is a schematic diagram of the structure of a display device provided in an embodiment of this invention. Referring to FIG11, the display device 20 includes any of the display panels 10 provided in the above embodiments. Therefore, the display device also has the beneficial effects of the display panels in the above embodiments. The similarities can be understood by referring to the explanation of the display panel above, and will not be repeated below.

[0098] The display device 20 provided in this embodiment of the invention can be a mobile phone as shown in FIG11, or any electronic product with display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet computer, digital camera, smart bracelet, smart glasses, vehicle display, industrial control equipment, medical display screen, touch interactive terminal, etc. This embodiment of the invention does not make any special limitation in this regard.

[0099] Referring again to Figure 11, optionally, the display device also includes a driver chip IC, which stores a display unevenness compensation map. The driver chip IC is used to compensate for the display unevenness of the display panel 10 according to the display unevenness compensation map when the display panel 10 is displaying.

[0100] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for compensating for uneven display on a display panel, characterized in that, Comprising: Controlling a display panel to display at least two test screens, at least two of the test screens including display unevenness of different forms; Using a camera to capture the test screens, and obtaining the capture data of at least two of the test screens; Processing the capture data of at least two of the test screens to form a display unevenness compensation map including at least two forms; When the display panel is displaying, performing display unevenness compensation according to the display unevenness compensation map.

2. The method for compensating for uneven display of a display panel according to claim 1, characterized in that, Controlling the display panel to display at least two test screens, including: Controlling the display panel to display at least two of a first test screen with a first brightness and a first gray scale, a second test screen with a second brightness and the first gray scale, and a white test screen with the second brightness and a second gray scale; Wherein, the first brightness is less than the second brightness, and the first gray scale is less than the second gray scale.

3. The method for compensating for uneven display of a display panel according to claim 2, characterized in that, The first brightness is 2 nit, the second brightness is 500 nit, the first gray scale is 32 gray levels, and the second gray scale is 255 gray levels.

4. The method for compensating for uneven display of a display panel according to claim 3, characterized in that, The first test screen includes a first type of display unevenness and a second type of display unevenness, the second test screen includes the second type of display unevenness, and the white test screen includes the second type of display unevenness and a third type of display unevenness.

5. The method for compensating for uneven display of a display panel according to claim 4, characterized in that, The first type of display unevenness is orange pattern type display unevenness, the second type of display unevenness is straight stripe type display unevenness, and the third type of display unevenness is brightness uniformity type display unevenness.

6. The method for compensating for uneven display of a display panel according to claim 1, characterized in that, Using a camera to capture the test screens, and obtaining the capture data of at least two of the test screens, including: Controlling the display panel to display the first test screen, and using a camera to capture the first image of the first test screen; Controlling the display panel to display the i-th test screen, and using a camera to capture the i-th image of the i-th test screen; Controlling the display panel to display the n-th test screen, and using a camera to capture the n-th image of the n-th test screen; ​ ​ 7. The method for compensating for uneven display of a display panel according to claim 6, characterized in that, n＝3。 8. The method for compensating for uneven display of a display panel according to claim 2, characterized in that, ​ ​ ​ ​ ​ 9. The method for compensating for uneven display in a display panel according to claim 8, characterized in that, ​ ​ 10. The method for compensating for uneven display of a display panel according to claim 9, characterized in that, ​ Get the type of unevenness in the display of the image to be displayed; The unevenness compensation value of the display screen to be displayed is determined according to y = x1A + ​​x2B + x3C; The display unevenness compensation coefficient is determined based on the aforementioned display unevenness compensation value; The display unevenness compensation coefficient is applied to the display area to achieve display unevenness compensation; Where y represents the value of the non-uniformity compensation, and x1, x2 and x3 are constants between 0 and 1.

11. The method for compensating for uneven display of a display panel according to claim 10, characterized in that, After performing display unevenness compensation based on the aforementioned display unevenness compensation map, the process further includes: Test the compensated display. If uneven display still exists, adjust at least one of x1, x2, and x3 to perform uneven display compensation again until the compensation requirements are met.

12. The method for compensating for uneven display of a display panel according to claim 1, characterized in that, The display area of ​​the display panel is divided into at least two sub-display areas, and each of the at least two sub-display areas corresponds to a different display unevenness compensation map.

13. A display panel, characterized in that, The display panel employs any one of the display unevenness compensation methods described in claims 1 to 12 to improve display uniformity during display.

14. A display device, characterized in that, Includes the display panel as described in claim 13.

15. The display device according to claim 14, characterized in that, It also includes a driver chip, which has a pre-stored display unevenness compensation map. The driver chip is used to compensate for the display unevenness of the display panel according to the display unevenness compensation map when the display panel is displayed.

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