Display compensation method, device and display equipment of display panel

Abstract

The application discloses a display compensation method, device and display equipment of display panel. The display compensation method comprises the following steps: acquiring a first gray scale of a first sub-pixel to be compensated and a second gray scale of a second sub-pixel located in an adjacent row of the first sub-pixel; if the first gray scale is greater than a preset gray scale threshold, acquiring a first overdrive gray scale corresponding to the first gray scale according to the second gray scale, a first compensation table and a gain value of a display partition where the first sub-pixel is located, so as to perform display compensation through the first overdrive gray scale; if the first gray scale is less than or equal to the preset gray scale threshold, acquiring a second overdrive gray scale corresponding to the first gray scale according to the second gray scale and a second compensation table of the display partition where the first sub-pixel is located, so as to perform display compensation through the second overdrive gray scale. The application adopts different compensation manners for high gray scales and low gray scales, can not only take into account the compensation of different display partitions in the plane, but also can reduce the storage space of the compensation table and relieve the hardware pressure.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display compensation method, apparatus, and display device for a display panel. Background Technology

[0002] LCD monitors, such as those using a flip-screen architecture, can employ LOD (Line OverDrive) technology to address issues like insufficient brightness and color deviation caused by inadequate pixel charging, thereby optimizing uneven brightness and improving image quality. Typically, to ensure compensation accuracy, multiple compensation tables are used to compensate for all grayscale levels in different areas of the screen during LOD charging compensation. However, this results in significant storage requirements, increasing hardware demands. Summary of the Invention

[0003] Embodiments of this application provide a display compensation method, apparatus, and display device for a display panel, thereby reducing the storage space requirements for LOD compensation and alleviating hardware pressure.

[0004] To address the aforementioned technical problems, embodiments of this application disclose the following technical solutions:

[0005] In a first aspect, a display compensation method for a display panel is provided, the display panel including multiple display zones, each of the display zones including multiple sub-pixels arranged in an array, the display compensation method including:

[0006] Obtain the first gray level of the first sub-pixel to be compensated, and the second gray level of the second sub-pixel located in the row above the first sub-pixel;

[0007] If the first gray level is greater than the preset gray level threshold, then according to the second gray level, the first compensation table and the gain value of the display partition where the first sub-pixel is located, the first overdrive gray level corresponding to the first gray level is obtained, so as to perform display compensation through the first overdrive gray level. The first compensation table is used to characterize the mapping relationship between each display gray level greater than the preset gray level threshold and the overdrive gray level in the display panel, and the gain value is used to characterize the compensation intensity corresponding to the display partition.

[0008] If the first gray level is less than or equal to the preset gray level threshold, then according to the second gray level and the second compensation table of the display partition where the first sub-pixel is located, the second overdrive gray level corresponding to the first gray level is obtained, so as to perform display compensation through the second overdrive gray level. The second compensation table is used to characterize the mapping relationship between each display gray level less than or equal to the preset gray level threshold and the overdrive gray level in the corresponding display partition.

[0009] In conjunction with the first aspect, the second compensation table for each of the display partitions is set in the following manner:

[0010] For any first binding point grayscale, the display partition is controlled to display a first light-load image and multiple first heavy-load images under the first binding point grayscale, wherein the first binding point grayscale is less than or equal to the preset grayscale threshold.

[0011] Based on the brightness difference between the second brightness of each of the first heavily loaded images and the first brightness of the first lightly loaded images, obtain each of the second overdrive gray levels corresponding to the first binding point gray level.

[0012] Based on the grayscale of each first binding point and the corresponding grayscale of each second overdrive point, the second compensation table of the display partition is generated.

[0013] In conjunction with the first aspect, the gain value of each of the display partitions is set in the following manner:

[0014] The display panel is controlled to display the first light-load image under the preset grayscale threshold;

[0015] Extract the third brightness of the target test area and the fourth brightness of each of the display zones;

[0016] Based on the brightness ratio of each of the fourth brightness levels to the third brightness level, and the preset gain value of the target test area, the gain value of each of the display zones is obtained.

[0017] In conjunction with the first aspect, the first compensation table is set up in the following manner:

[0018] For any second binding point grayscale, the target test area of ​​the display panel is controlled to display a second light-load image and multiple second heavy-load images under the second binding point grayscale, wherein the second binding point grayscale is greater than the preset grayscale threshold.

[0019] Based on the brightness difference between the sixth brightness of each of the second heavy-load images and the fifth brightness of the second light-load images, obtain each of the first overdrive gray levels corresponding to the second binding point gray level;

[0020] The first compensation table is generated based on the grayscale of each second binding point, the corresponding first overdrive grayscale, and the preset gain value of the target test area.

[0021] In conjunction with the first aspect, the target test area is at least a portion of the display partition located at the center of the display panel.

[0022] In conjunction with the first aspect, the display panel includes multiple data lines, each of which connects to multiple sub-pixels of at least two different colors; the light-load image corresponding to each bound point grayscale is obtained through the following method:

[0023] The sub-pixels of any one of the odd-numbered rows and even-numbered rows in the display panel are controlled to not emit light, and each data line is controlled to receive the corresponding grayscale of the bound point to obtain the corresponding light load image.

[0024] In conjunction with the first aspect, controlling each sub-pixel of any one of the odd-numbered rows and even-numbered rows in the display panel to not emit light includes:

[0025] The row scan signal of either the odd row or the even row is set to zero, or the input channel of the row scan signal of either the odd row or the even row is closed.

[0026] In conjunction with the first aspect, the display panel has an aspect ratio of m:n, and the number of display zones is determined based on the aspect ratio.

[0027] Secondly, a display compensation device for a display panel is provided, the display panel including a plurality of display zones, each of the display zones including a plurality of sub-pixels arranged in an array, the display compensation device including:

[0028] The first acquisition module is used to acquire the first gray level of the first sub-pixel to be compensated, and the second gray level of the second sub-pixel located in the row above the first sub-pixel;

[0029] The second acquisition module is used to acquire the first overdrive gray level corresponding to the first gray level according to the second gray level, the first compensation table and the gain value of the display partition where the first sub-pixel is located if the first gray level is greater than the preset gray level threshold, so as to perform display compensation through the first overdrive gray level. The first compensation table is used to characterize the mapping relationship between each display gray level and the overdrive gray level in the display panel that is greater than the preset gray level threshold, and the gain value is used to characterize the compensation intensity corresponding to the display partition.

[0030] The third acquisition module is used to acquire the second overdrive gray level corresponding to the first gray level according to the second gray level and the second compensation table of the display partition where the first sub-pixel is located if the first gray level is less than or equal to the preset gray level threshold, so as to perform display compensation through the second overdrive gray level. The second compensation table is used to characterize the mapping relationship between each display gray level less than or equal to the preset gray level threshold and the overdrive gray level in the corresponding display partition.

[0031] Thirdly, a display device is provided, including a display panel and a processor. The display panel includes a plurality of display zones, each of which includes a plurality of sub-pixels arranged in an array. The processor performs display compensation on each of the sub-pixels using a display compensation method as described in any of the first aspects, or uses a display compensation device as described in the second aspect.

[0032] One of the above technical solutions has the following advantages or beneficial effects:

[0033] Compared with the prior art, the present application provides a display compensation method for a display panel, comprising: obtaining a first gray level of a first sub-pixel to be compensated, and a second gray level of a second sub-pixel located in an adjacent row to the first sub-pixel; if the first gray level is greater than a preset gray level threshold, then obtaining a first overdrive gray level corresponding to the first gray level according to the second gray level, a first compensation table, and the gain value of the display partition where the first sub-pixel is located, so as to perform display compensation through the first overdrive gray level; if the first gray level is less than or equal to the preset gray level threshold, then obtaining a second overdrive gray level corresponding to the first gray level according to the second gray level and a second compensation table of the display partition where the first sub-pixel is located, so as to perform display compensation through the second overdrive gray level; the first compensation table is used to characterize the mapping relationship between each display gray level greater than the preset gray level threshold and the overdrive gray level in the display panel, the gain value is used to characterize the compensation intensity of the corresponding display partition, and the second compensation table is used to characterize the mapping relationship between each display gray level less than or equal to the preset gray level threshold and the overdrive gray level in the corresponding display partition. The display compensation method for the display panel provided in this application uses a unified first compensation table and the gain value of each display zone to perform LOD compensation for high grayscale. The corresponding compensation intensity is adjusted by the gain value of different display zones. For low grayscale, a multi-compensation table is used for compensation. This not only takes into account the compensation of different display zones in the plane, but also reduces the storage space required for the compensation table and reduces the hardware pressure.

[0034] This application discloses a display compensation device for a display panel. For high grayscale, a unified first compensation table and the gain values ​​of each display zone are used for LOD compensation. The corresponding compensation intensity is adjusted by the gain values ​​of different display zones. For low grayscale, a multi-compensation table is used for compensation. This not only takes into account the compensation of different display zones in the panel, but also reduces the storage space required for the compensation table and alleviates the hardware pressure.

[0035] The display device of this application adopts different LOD compensation methods for high grayscale and low grayscale, which can not only take into account the compensation of different display zones in the plane, but also reduce the storage space required for the compensation table and reduce the hardware pressure. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of an example structure of the display panel of the Flip architecture in the embodiments of this application;

[0038] Figure 2 for Figure 1 A schematic diagram of the normal display timing when the central display panel is always on;

[0039] Figure 3 This is a schematic diagram of the overall process of the display compensation method for the display panel in an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the light-load screen of the display panel in the embodiments of this application;

[0041] Figure 5 for Figure 4 A schematic diagram illustrating the display timing of a lightly loaded screen on the central display panel;

[0042] Figure 6 This is a schematic diagram of the overloaded screen of the display panel in the embodiments of this application;

[0043] Figure 7 for Figure 6 A schematic diagram of the display timing for the reloaded screen on the central display panel;

[0044] Figure 8 This is a schematic diagram of an example of the first compensation table in the embodiments of this application;

[0045] Figure 9 This is a schematic diagram illustrating an example of the gain value of the display panel in an embodiment of this application;

[0046] Figure 10 This is a schematic diagram of an example LOD compensation curve in an embodiment of this application;

[0047] Figure 11 This is a schematic diagram of an example of the second compensation table in an embodiment of this application;

[0048] Figure 12 This is a schematic diagram of the display compensation device for the display panel in an embodiment of this application;

[0049] Figure 13 This is a schematic diagram of the structure of a display device according to an embodiment of this application;

[0050] Figure label:

[0051] 10-Display panel; 11-Subpixel; 12-Data line; 13-Scan line; 14-Display partition; 1201-First acquisition module; 1202-Second acquisition module; 1203-Third acquisition module; 1301-Processor. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0053] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified.

[0054] For LCD monitors, the color and brightness performance of the LCD screen is difficult to standardize. Due to minute differences in liquid crystal molecules during manufacturing, combined with factors such as the optical structure and electrical design of the LCD monitor itself, problems such as uneven grayscale response and uneven brightness in different parts of the LCD screen often occur, causing inconvenience and impact on users. Currently, the price, appearance, and quality of LCD screens are key concerns for users. Line-OD technology (i.e., LOD technology) can be used to solve problems such as insufficient brightness and color deviation caused by insufficient grayscale pixel charging in LCD monitors. As an effective means of optimizing the image quality of LCD monitors, it has improved the image quality of LCD monitors, better meeting users' requirements for a high-quality visual experience.

[0055] To ensure compensation accuracy, multiple compensation tables are typically used to compensate for all gray levels in different areas of the display panel when performing charge compensation via LOD. However, this results in a large storage requirement, increasing hardware pressure. Alternatively, a single compensation table can be used for charge compensation on the entire display panel, compensating for intra-panel uniformity differences with corresponding gain values. However, since the compensation factor for all gray levels (RGB) in different areas of the panel is the same, and the compensation effect for different gray levels may not be the same, the compensation result can still lead to significant color shift within the panel, resulting in poor display quality.

[0056] Please refer to the following: Figure 1 and Figure 2 , Figure 1 This illustration shows an example structure of the display panel of the Flip architecture in an embodiment of this application. Figure 2 It indicated Figure 1 The typical display timing when the display panel is always on. The Flip architecture display panel 10 includes multiple sub-pixels 11 arranged in an array. The multiple sub-pixels 11 may include red sub-pixels R, green sub-pixels G, and blue sub-pixels B, where the sub-pixels 11 in each column have the same color. The display panel 10 includes multiple data lines 12 (e.g., S1 to S12) and multiple scan lines 13 (e.g., G1 to G6). Each data line 12 connects to at least two different colored sub-pixels 11, and each scan line 13 connects to all sub-pixels 11 in the corresponding row. Taking the example of each data line 12 connecting two different colored sub-pixels 11, when the display panel 10 is displaying, the same data line 12 provides data signals to the corresponding sub-pixels 11 from left to right, and the scan line 13 provides the corresponding row scan signal (i.e., clock signal) to control the opening and closing of the corresponding row of sub-pixels 11 row by row. The display panel 10 may include multiple display partitions 14.

[0057] In some examples, the display panel 10 has an aspect ratio of m:n, and the number of display partitions 14 can be determined based on this aspect ratio. For instance, if the aspect ratio m:n of the display panel 10 is 4:3 or 16:9, then the number of display partitions 14 can be 8×6, totaling 48, and can be evenly divided. This not only ensures uniform image quality but also mitigates problems such as excessive storage space requirements due to too many partitions and large compensation accuracy errors due to too few partitions.

[0058] The charging of each sub-pixel 11 in the Flip architecture display panel 10 is poor, and LOD technology is also required to compensate for grayscale voltage. The applicant noted that during the debugging of the LOD compensation table, due to its own structure, it is impossible to maintain a stable output state for the data signal, meaning it is impossible to display a lightly loaded structure with a pure color. Therefore, the brightness of the lightly loaded image cannot be used as the brightness benchmark for each heavily loaded image, making it impossible to find an accurate LOD compensation value. The compensation effect can only be confirmed based on subjective judgment and the value of CCT (Color Gamma Crosstalk, a quality assessment specification reflecting the charging rate of the data line), determining whether there is color shift. CCT = (R+G+BW) / W × 100%, where R, G, B, and W are the grayscale levels corresponding to red, green, blue, and white, respectively. Therefore, the Flip architecture cannot accurately assess the charging status of pixels, requiring new debugging methods and LOD value filling methods to optimize the charging compensation problem of the Flip architecture. Furthermore, even if an accurate LOD compensation table is found, using multiple compensation tables to compensate for all gray levels in different areas within the plane will still increase storage space requirements and put more pressure on the hardware.

[0059] In view of this, the present application provides a display compensation method for a display panel. By distinguishing between low grayscale and high grayscale, a unified first compensation table and the gain value of each display zone are used to perform LOD compensation for high grayscale, so as to adjust the corresponding compensation intensity by using the gain value of different display zones. For low grayscale, a multi-compensation table method is used to perform LOD compensation. This method can not only take into account the compensation of different display zones in the plane, but also reduce the storage space required for the compensation table and reduce the hardware pressure, thereby solving at least part of the above-mentioned technical problems.

[0060] Please see Figure 3 , Figure 3 The illustration shows the overall flow of a display compensation method for a display panel according to an embodiment of this application. The display compensation method for the display panel includes the following steps:

[0061] Step 301: Obtain the first gray level of the first sub-pixel to be compensated, and the second gray level of the second sub-pixel located in the row above the first sub-pixel.

[0062] Specifically, the first sub-pixel is any sub-pixel on the display panel. The second sub-pixel is set in the same column as the first sub-pixel, but in the row above the first sub-pixel. That is to say, the data signal will charge the second sub-pixel first, and then charge the first sub-pixel.

[0063] Step 302: If the first gray level is greater than the preset gray level threshold, then according to the second gray level, the first compensation table and the gain value of the display partition where the first sub-pixel is located, the first overdrive gray level corresponding to the first gray level is obtained, so as to perform display compensation through the first overdrive gray level. The first compensation table is used to characterize the mapping relationship between each display gray level greater than the preset gray level threshold and the overdrive gray level in the display panel, and the gain value is used to characterize the compensation intensity of the corresponding display partition.

[0064] Specifically, the preset grayscale threshold can be determined according to the display accuracy of the display panel. For example, an 8-bit display panel can display a total of 256 grayscale levels, and the preset grayscale threshold can be set to 160 grayscale levels.

[0065] In some embodiments, the first compensation table can be set up in the following manner:

[0066] Step 1: For any second binding point grayscale, control the target test area of ​​the display panel to display the second light-load image and multiple second heavy-load images under the second binding point grayscale, where the second binding point grayscale is greater than the preset grayscale threshold.

[0067] Specifically, the second binding point grayscale can be a portion or all of the grayscale levels above the preset grayscale threshold. For example, if the total grayscale is 0 to 255 and the preset grayscale threshold is 160, the second binding point grayscale can be set to all grayscale levels from 161 to 255, or it can be set to, for example, 176, 192, 224, and 255 grayscale levels. The specific setting can be made according to actual needs.

[0068] In some examples, the target test area can be a display partition located at the center of the display panel, or it can be a portion of a display partition located at the center of the display panel.

[0069] Please refer to the following: Figure 4 and Figure 5 , Figure 4 This illustration shows a lightly loaded screen on the display panel in an embodiment of this application. Figure 5 It indicated Figure 4 The display panel displays the timing of the light-load image. In some examples, it is possible to control that each sub-pixel 11 in any one of the odd-numbered rows and even-numbered rows of the display panel 10 does not emit light, and to control each data line 12 to receive the corresponding grayscale of the bound point in order to obtain the corresponding light-load image.

[0070] In some examples, the sub-pixels 11 of the corresponding rows in the display panel 10 can be controlled to not emit light by setting the row scan signal (i.e., the CK signal) of either the odd rows or the even rows to zero, or by turning off the input channel of the row scan signal of either the odd rows or the even rows. Figure 4 and Figure 5For example, in the control display panel 10, the sub-pixels 11 of each even-numbered row are not illuminated. This means the CK signals (G2, G4, G6) of each even-numbered row are disconnected from the output or set to zero, preventing charging of the sub-pixels 11. Meanwhile, the CK signals (G1, G3, G4) of each odd-numbered row are scanned normally, and the data signals of each data line 12 are kept at a constant output of the corresponding grayscale level. The brightness of the sub-pixels at this time is the brightness of the light-load screen. It can be understood that when the data signals maintain the grayscale output of each second-binding point, the second light-load screen corresponding to each second-binding point grayscale, and the fifth brightness corresponding to each second light-load screen, can be obtained.

[0071] By using the above method, the CK signal is specially processed to adjust the light load mode of the screen, so as to obtain the output state when the data signal remains stable. This allows for accurate light load screen display, and the difference between light load and heavy load can be used to obtain accurate LOD compensation values.

[0072] Please refer to the following: Figure 6 and Figure 7 , Figure 6 This illustration shows the reloaded screen of the display panel in an embodiment of this application. Figure 7 It indicated Figure 6 The display panel displays the timing of the reloaded images. In some examples, the grayscale of each sub-pixel 11 in the odd-numbered rows of the display panel 10 can be kept unchanged, for example, all kept at 0. Then, the display grayscale of each sub-pixel 11 in the even-numbered rows can be changed to any one of 161 to 255, and the data signals transmitted on each data line 12 can be controlled to perform corresponding changes to obtain the second reloaded images corresponding to the second binding point grayscale 161 to 255 when the sub-pixel 11 in the previous row is displayed as 0. At this time, the brightness of each sub-pixel 11 in the even-numbered rows is the sixth brightness of the corresponding reloaded image. Then, the gray levels of each sub-pixel 11 in the odd-numbered rows of the control display panel 10 are increased by one gray level, for example, all are kept at 1. Then, the display gray level of each sub-pixel 11 in the even-numbered rows is changed to any one of 161 to 255, and the data signals transmitted on each data line 12 are controlled to perform corresponding changes to obtain the respective second overload screens corresponding to the second binding point gray levels 161 to 255 when the sub-pixel 11 in the previous row is displayed as 1, and so on. It can be understood that if the smallest second binding point gray level in the first compensation table is 176, then the gray levels between 161 and 176 can be obtained by linear extrapolation according to the first compensation table.

[0073] Step 2: Based on the brightness difference between the sixth brightness of each second heavy-load image and the fifth brightness of the second light-load image, obtain each first overdrive grayscale corresponding to the second binding point grayscale.

[0074] Specifically, the LOD compensation curve can be obtained based on the brightness trend of light and heavy loads, and the grayscale difference corresponding to the brightness difference between each sixth brightness and the fifth brightness can be obtained based on the LOD compensation curve. This will be described in detail in subsequent embodiments. Finally, the sum of the second binding point grayscale and each grayscale difference is determined as the first overdrive grayscale corresponding to the second binding point grayscale. For example, if the second binding point grayscale is 190, and the grayscale of the previous row of sub-pixels is 0, based on the brightness difference of the light load image corresponding to grayscale 190, the grayscale difference is 30. Then, grayscale 220 is determined as the first overdrive grayscale corresponding to the second binding point grayscale 190 when the grayscale of the previous row of sub-pixels is 0.

[0075] Step 3: Generate a first compensation table based on the grayscale of each second binding point, the corresponding first overdrive grayscale, and the preset gain value of the target test area.

[0076] Specifically, the first difference between the first overdrive grayscale and the second bound-point grayscale, divided by the quotient of the preset gain value of the target test area, can be determined as the fill value difference. Then, the sum of the second bound-point grayscale and the fill value difference is determined as the overdrive grayscale fill value corresponding to the second bound-point grayscale in the first compensation table. For example, if the second bound-point grayscale is 190, and the grayscale of the preceding sub-pixel is 0, the first overdrive grayscale is 220, and the preset gain value is 0.5. Therefore, the first difference is 30, and the fill value difference is 60. In the first compensation table, the overdrive grayscale fill value corresponding to the second bound-point grayscale 190 when the grayscale of the preceding sub-pixel is 0 is 250. It is understood that if the calculated overdrive grayscale fill value exceeds the maximum grayscale, the maximum grayscale can be used for fill value, or the preset gain value can be adjusted to reduce the fill value. The specific method can be flexibly determined based on the actual situation.

[0077] For example, the preset gain value Gain0 of the target test area can be set according to actual needs, such as 1 or 0.5, without any specific limitation.

[0078] For example, see Figure 8 , Figure 8 An example of the first compensation table in the embodiments of this application is illustrated. Taking a total grayscale of 0-255 and a preset grayscale threshold of 160 as an example, the first compensation table includes overdrive grayscale filling values ​​corresponding to each second binding point grayscale greater than 160. The overdrive grayscale filling values ​​are only for illustration and are not actual filling values.

[0079] By setting the first compensation table in the above manner, the output of the CK signal can be optimized to adjust the light load mode of the screen. By the ratio of light load to heavy load, the value of LOD compensation that needs to be obtained can be obtained. Thus, by pointing out the accurate light load screen, the accurate LOD compensation value can be found based on the difference in brightness between light and heavy load. This can improve the problem of subjective limitations when debugging the LOD compensation table of the Flip architecture display panel.

[0080] In some embodiments, the gain value for each display partition can be set in the following manner:

[0081] Step 1: Control the display panel to display the first light load image under the preset grayscale threshold.

[0082] Specifically, the method of displaying the light-load screen can be referred to the aforementioned embodiments, and will not be repeated here.

[0083] Step 2: Extract the third brightness of the target test area and the fourth brightness of each display partition.

[0084] Step 3: Based on the brightness ratio of each fourth brightness to the third brightness, and the preset gain value of the target test area, obtain the gain value of each display partition.

[0085] Specifically, the product of the brightness ratio and the preset gain value is used to determine the corresponding gain value.

[0086] For example, if the preset grayscale threshold is 160 and the preset gain value of the target test area is 0.5, and the brightness ratio of the fourth brightness to the third brightness of any display partition under the first light load screen is 0.75, then the gain value of that display partition is 0.375.

[0087] For example, see Figure 9 , Figure 9 This illustration shows an example of the gain value of the display panel in an embodiment of this application. Taking a full grayscale of 0-255 grayscale and a display panel divided into 8×6 display zones as an example, the gain value of each display zone can be 1, represented by 255.

[0088] Specifically, for the first compensation table and the gain value of each display partition, step 302 can be implemented in the following way:

[0089] Based on the second gray level in row N and the first gray level in row N+1, the corresponding overdrive gray level fill value can be obtained from the first compensation table. Then, the difference between the overdrive gray level fill value and the fill value of the first gray level is obtained, and the fill value difference is multiplied by the gain value of the display partition to obtain the first difference value. Finally, the sum of the first difference value and the first gray level is determined as the first overdrive gray level, and the first sub-pixel is driven by the first overdrive gray level for display.

[0090] Using the above method, a unified first compensation table and the gain values ​​of each display partition can be used for LOD compensation for high grayscale. The corresponding compensation intensity can be adjusted by the gain values ​​of different display partitions. This not only takes into account the compensation of different display partitions in the plane, but also reduces the storage space required for the compensation table and alleviates the hardware pressure.

[0091] Step 303: If the first gray level is less than or equal to the preset gray level threshold, then according to the second gray level and the second compensation table of the display partition where the first sub-pixel is located, the second overdrive gray level corresponding to the first gray level is obtained, so as to perform display compensation through the second overdrive gray level. The second compensation table is used to characterize the mapping relationship between each display gray level less than or equal to the preset gray level threshold and the overdrive gray level in the corresponding display partition.

[0092] Understandably, the second compensation table corresponds one-to-one with the display partition.

[0093] In some embodiments, the second compensation table for each display partition can be configured in the following manner:

[0094] Step 1: For any first binding point grayscale, control the display partition to display the first light-load image and multiple first heavy-load images under the first binding point grayscale respectively, where the first binding point grayscale is less than or equal to the preset grayscale threshold.

[0095] Specifically, the first binding point grayscale can be a subset or all grayscale levels less than or equal to the preset grayscale threshold. For example, if the total grayscale range is 0 to 255 and the preset grayscale threshold is 160, the first binding point grayscale can be set to all grayscale levels from 0 to 160, or it can be set to, for example, 0, 4, 8, 16, 32, 64, 80, 96, 112, 128, 144, and 160 grayscale levels. The specific setting can be made according to actual needs.

[0096] Furthermore, the specific methods for displaying light-load and heavy-load screens can be found in the relevant discussion in the aforementioned first compensation table, and will not be repeated here.

[0097] Step 2: Based on the brightness difference between the second brightness of each first heavily loaded image and the first brightness of the first lightly loaded image, obtain each second overdrive grayscale corresponding to the first binding point grayscale.

[0098] Specifically, the LOD compensation curve can be obtained based on the brightness trend of light and heavy loads, and the gray level difference corresponding to the brightness difference between each second brightness and the first brightness can be obtained based on the LOD compensation curve. Finally, the sum of the first binding point gray level and each gray level difference is determined as each first overdrive gray level corresponding to the first binding point gray level.

[0099] Please see Figure 10 , Figure 10An example of the LOD compensation curve in an embodiment of this application is illustrated. For instance, by measuring the light and heavy load brightness trends of the first light-load and first heavy-load scenes, a first brightness change curve a under the light-load scene and a second brightness change curve b under the heavy-load scene can be obtained. Based on the first brightness change curve a and the second brightness change curve b, the grayscale difference corresponding to the brightness difference between the second brightness and the first brightness can be obtained. For example, if the previous row of sub-pixels displays 0 grayscale, and the first binding point grayscale is 160, the grayscale difference corresponding to the brightness difference between the second brightness and the first brightness is 30 grayscale. Therefore, 190 is determined as the first overdrive grayscale corresponding to the first binding point grayscale 160 when the previous row displays 0 grayscale.

[0100] Step 3: Based on the grayscale of each first binding point and the corresponding grayscale of each second overdrive point, generate the second compensation table for the display partition.

[0101] Specifically, each second overdrive grayscale can be determined as the overdrive grayscale value corresponding to the first binding point grayscale in the second compensation table.

[0102] For example, see Figure 11 , Figure 11 An example of the second compensation table in the embodiments of this application is illustrated. Taking a total grayscale of 0-255 and a preset grayscale threshold of 160 as an example, the second compensation table includes the second overdrive grayscale corresponding to each first binding point grayscale less than or equal to 160 grayscale. The second overdrive grayscale is only for illustration and is not an actual value.

[0103] Specifically, based on the second compensation table, step 303 can be implemented in the following way:

[0104] Based on the second gray level in row N and the first gray level in row N+1, the corresponding overdrive gray level fill value can be obtained from the second compensation table, which is the second overdrive gray level. Finally, the first sub-pixel is driven by the second overdrive gray level for display.

[0105] In some embodiments, when the method of this application performs a lookup of the first compensation table and the second compensation table, since the depth of the first compensation table and the second compensation table is usually aligned with the ACC compensation table (i.e., the white balance RGB table corresponding to Gamma), and the display color depth of the overdrive grayscale fill value is usually 2 bits larger than the first grayscale and the second grayscale, in order to avoid the conflict between the accuracy of the overdrive grayscale fill value and the brightness, resulting in the inability to find an accurate value to compensate for the charging, and the situation of insufficient charging due to a missing value or excessive charging due to an extra value, the color depth of the first grayscale and the second grayscale can be increased to be the same as the color depth of the overdrive grayscale fill value. Then, the input and output are combined with dithering to compensate for the internal fill value range of LOD, and it is compatible with other processing modules to achieve more accurate compensation.

[0106] The above method is used because the regional brightness difference of low grayscale is more obvious than that of high grayscale in subjective sense. Therefore, the use of multiple compensation tables for low grayscale can not only accurately compensate for the obvious regional differences of low grayscale, but also reduce the amount of data in the compensation table and reduce the storage space requirement.

[0107] It is understood that the embodiments of this application perform LOD high and low grayscale compensation separately. Low grayscale is compensated using a multi-second compensation table mode, while high grayscale is compensated using a Gain value plus a first compensation table. This can accurately compensate for obvious regional differences in low grayscale while ensuring appropriate center compensation in high grayscale, thereby optimizing the charging compensation result of LOD for the panel, solving problems such as in-plane unevenness and color shift in low grayscale, and optimizing panel image quality. In addition, by optimizing the debugging method of LOD compensation table in the Flip architecture, the output of the CK signal is changed to adjust the light load mode of the image. By the ratio of light load to heavy load, the value of LOD compensation to be obtained, thereby meeting the requirement of the Flip architecture to accurately evaluate the charging status of pixels, thus optimizing charging compensation.

[0108] Accordingly, please refer to Figure 12 , Figure 12 This diagram illustrates the structure of a display compensation device for a display panel according to an embodiment of this application. The display compensation device for a display panel provided in this embodiment is applied to a display panel, which includes multiple display zones, each display zone including multiple sub-pixels arranged in an array. The display compensation device specifically includes a first acquisition module 1201, a second acquisition module 1202, and a third acquisition module 1203.

[0109] The first acquisition module 1201 is used to acquire the first gray level of the first sub-pixel to be compensated, and the second gray level of the second sub-pixel located in the row above the first sub-pixel;

[0110] The second acquisition module 1202 is used to acquire the first overdrive gray level corresponding to the first gray level according to the second gray level, the first compensation table and the gain value of the display partition where the first sub-pixel is located if the first gray level is greater than the preset gray level threshold, so as to perform display compensation through the first overdrive gray level. The first compensation table is used to characterize the mapping relationship between each display gray level in the display panel that is greater than the preset gray level threshold and the overdrive gray level, and the gain value is used to characterize the compensation intensity of the corresponding display partition.

[0111] The third acquisition module 1203 is used to acquire the second overdrive gray level corresponding to the first gray level according to the second compensation table of the display partition where the first sub-pixel is located, if the first gray level is less than or equal to the preset gray level threshold, so as to perform display compensation through the second overdrive gray level. The second compensation table is used to characterize the mapping relationship between each display gray level less than or equal to the preset gray level threshold and the overdrive gray level in the corresponding display partition.

[0112] In some embodiments, the display compensation device may further include a fourth acquisition module, which is configured to set a second compensation table for each display partition in the following manner:

[0113] For any first binding point grayscale, the control display partition displays the first light-load image and multiple first heavy-load images under the first binding point grayscale respectively, and the first binding point grayscale is less than or equal to the preset grayscale threshold.

[0114] Based on the brightness difference between the second brightness of each first heavy-load image and the first brightness of the first light-load image, obtain each second overdrive grayscale corresponding to the first binding point grayscale;

[0115] Based on the grayscale of each first binding point and the corresponding grayscale of each second overdrive point, a second compensation table for the display partition is generated.

[0116] In some embodiments, the fourth acquisition module is further configured to set the gain value for each display partition in the following manner:

[0117] The control display panel displays the first light-load image at the preset grayscale threshold;

[0118] Extract the third brightness of the target test area and the fourth brightness of each display zone;

[0119] Based on the brightness ratio of each fourth brightness to the third brightness, and the preset gain value of the target test area, the gain value of each display zone is obtained.

[0120] In some embodiments, the fourth acquisition module is further configured to set the first compensation table in the following manner:

[0121] For any second binding point grayscale, the target test area of ​​the control display panel displays the second light-load image and multiple second heavy-load images under the second binding point grayscale, respectively, and the second binding point grayscale is greater than the preset grayscale threshold.

[0122] Based on the brightness difference between the sixth brightness of each second heavy load image and the fifth brightness of the second light load image, obtain each first overdrive gray level corresponding to the second binding point gray level.

[0123] A first compensation table is generated based on the grayscale of each second binding point, the corresponding first overdrive grayscale, and the preset gain value of the target test area.

[0124] In some embodiments, the target test area is at least a portion of a display partition located at the center of the display panel.

[0125] In some embodiments, the display panel includes multiple data lines, each data line connecting multiple sub-pixels of at least two different colors; the fourth acquisition module is specifically used to acquire the light-load image corresponding to each bound point grayscale in the following manner:

[0126] The system controls each sub-pixel in either the odd-numbered or even-numbered rows of the control panel to remain unlit, and controls each data line to receive the corresponding grayscale values ​​to obtain the corresponding light-load image.

[0127] In some embodiments, the fourth acquisition module is specifically used for:

[0128] Control the row scan signal of either the odd row or the even row to zero, or close the input channel of the row scan signal of either the odd row or the even row.

[0129] In some embodiments, the display panel has an aspect ratio of m:n, and the number of display zones is determined based on the aspect ratio.

[0130] It is understood that the display compensation device of the display panel in this application embodiment uses a unified first compensation table and the gain value of each display zone to perform LOD compensation for high grayscale, and adjusts the corresponding compensation intensity by using the gain value of different display zones. For low grayscale, a multi-compensation table is used for compensation, which can not only take into account the compensation of different display zones in the plane, but also reduce the storage space required for the compensation table and reduce the hardware pressure.

[0131] Accordingly, please refer to Figure 13 , Figure 13 This diagram illustrates the structure of a display device according to an embodiment of this application. The display device provided in this embodiment includes a display panel 10 and a processor 1301. The display panel 10 includes multiple display zones, each display zone including multiple sub-pixels arranged in an array. The processor 1301 performs display compensation on each sub-pixel using the display compensation method described in any of the above embodiments, or the processor 1301 uses the display compensation device described in any of the above embodiments.

[0132] It is understood that the display device in this application uses different LOD compensation methods for high grayscale and low grayscale, which can not only take into account the compensation of different display zones in the plane, but also reduce the storage space required for the compensation table and reduce the hardware pressure.

[0133] The above provides a detailed description of a display compensation method, apparatus, and display device for a display panel provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display compensation method of a display panel, characterized by, The display panel comprises a plurality of display partitions, each of the display partitions comprising a plurality of sub-pixels arranged in an array, and the display compensation method comprises: obtaining a first gray scale of a first sub-pixel to be compensated and a second gray scale of a second sub-pixel located in a row above the first sub-pixel; if the first gray scale is greater than a preset gray scale threshold, obtaining a first overdrive gray scale corresponding to the first gray scale according to the second gray scale, a first compensation table and a gain value of the display partition where the first sub-pixel is located, so as to perform display compensation through the first overdrive gray scale, the first compensation table being used to represent a mapping relationship between each display gray scale greater than the preset gray scale threshold and an overdrive gray scale in the display panel, and the gain value being used to represent a compensation intensity corresponding to the display partition; if the first gray scale is less than or equal to the preset gray scale threshold, obtaining a second overdrive gray scale corresponding to the first gray scale according to the second gray scale and a second compensation table of the display partition where the first sub-pixel is located, so as to perform display compensation through the second overdrive gray scale, the second compensation table being used to represent a mapping relationship between each display gray scale less than or equal to the preset gray scale threshold and an overdrive gray scale in the display partition.

2. The display compensation method of the display panel according to claim 1, wherein, The second compensation table of each display partition is set by the following method: for any first anchor gray scale, controlling the display partition to display a first light load picture under the first anchor gray scale and a plurality of first heavy load pictures respectively, the first anchor gray scale being less than or equal to the preset gray scale threshold; based on a luminance difference between a second luminance of each first heavy load picture and a first luminance of the first light load picture, obtaining each second overdrive gray scale corresponding to the first anchor gray scale; based on each first anchor gray scale and each corresponding second overdrive gray scale, generating the second compensation table of the display partition.

3. The display compensation method of the display panel according to claim 1, wherein, The gain value of each display partition is set by the following method: controlling the display panel to display a first light load picture under the preset gray scale threshold; extracting a third luminance of a target test area and a fourth luminance of each display partition; based on a luminance ratio of each fourth luminance and the third luminance and a preset gain value of the target test area, obtaining the gain value of each display partition.

4. The display compensation method of the display panel according to claim 1, wherein, The first compensation table is set by the following method: for any second anchor gray scale, controlling a target test area of the display panel to display a second light load picture under the second anchor gray scale and a plurality of second heavy load pictures respectively, the second anchor gray scale being greater than the preset gray scale threshold; based on a luminance difference between a sixth luminance of each second heavy load picture and a fifth luminance of the second light load picture, obtaining each first overdrive gray scale corresponding to the second anchor gray scale; based on each second anchor gray scale, each corresponding first overdrive gray scale and a preset gain value of the target test area, generating the first compensation table.

5. The display compensation method of the display panel according to claim 3 or 4, wherein, The target test area is at least part of a display partition located at a center position of the display panel.

6. The display compensation method of the display panel according to any one of claims 2-4, wherein, The display panel comprises a plurality of data lines, each of the data lines being connected to a plurality of sub-pixels of at least two different colors; and a light load picture corresponding to each binding point gray scale is obtained by the following method: Each sub-pixel of any one of each odd row and each even row in the display panel is controlled to not emit light, and each data line is controlled to receive a corresponding binding point gray scale, so as to obtain a corresponding light load picture.

7. The display compensation method of the display panel according to claim 6, wherein, The control of each sub-pixel of any one of each odd row and each even row in the display panel not emitting light comprises: The row scanning signal of any one of each odd row and each even row is controlled to be zero or the input channel of the row scanning signal of any one of each odd row and each even row is controlled to be closed.

8. The display compensation method of the display panel according to claim 1, wherein, The display panel has an aspect ratio m:n, and the number of display partitions is determined based on the aspect ratio.

9. A display compensation apparatus of a display panel, characterized by, The display panel comprises a plurality of display partitions, each of the display partitions comprising a plurality of sub-pixels arranged in an array, and the display compensation device comprises: A first obtaining module is configured to obtain a first gray scale of a first sub-pixel to be compensated and a second gray scale of a second sub-pixel located in a previous row of the first sub-pixel. A second obtaining module is configured to, if the first gray scale is greater than a preset gray scale threshold, obtain a first overdrive gray scale corresponding to the first gray scale according to the second gray scale, a first compensation table, and a gain value of a display partition in which the first sub-pixel is located, so as to perform display compensation by using the first overdrive gray scale, the first compensation table is used to represent a mapping relationship between each display gray scale greater than the preset gray scale threshold and an overdrive gray scale in the display panel, and the gain value is used to represent a compensation intensity corresponding to the display partition. A third obtaining module is configured to, if the first gray scale is less than or equal to the preset gray scale threshold, obtain a second overdrive gray scale corresponding to the first gray scale according to the second gray scale and a second compensation table of the display partition in which the first sub-pixel is located, so as to perform display compensation by using the second overdrive gray scale, the second compensation table is used to represent a mapping relationship between each display gray scale less than or equal to the preset gray scale threshold and an overdrive gray scale in the display partition.

10. A display device, characterized by comprising: The display compensation device comprises a display panel and a processor, the display panel comprises a plurality of display partitions, each of the display partitions comprising a plurality of sub-pixels arranged in an array, and the processor performs display compensation on each of the sub-pixels by using the display compensation method according to any one of claims 1-8. The display compensation device according to claim 9 is applied to the display panel.

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