Brightness compensation data determination method, display device, and driving method of display device

Abstract

This application discloses a method for determining brightness compensation data, a display device, and a driving method for the display device. The method for determining brightness compensation data includes: performing local area compensation on the original brightness data of different pixels to obtain first brightness compensation data for different pixels; and performing full-screen compensation based on the first brightness compensation data for different pixels to obtain second brightness compensation data for different pixels. This application can comprehensively compensate the brightness data of each pixel, so that the determined brightness compensation data can improve the problem of uneven display brightness easily caused by voltage drop in the prior art.

Description

Technical Field

[0001] This application belongs to the field of display technology, and in particular relates to a method for determining brightness compensation data, a display device, and a driving method for the display device. Background Technology

[0002] With the continuous innovation of various electronic devices, the display panels used for information display and / or information interaction in electronic devices are also constantly being updated. Among them, organic light-emitting diode (OLED) display panels are gradually becoming the mainstream. However, currently, OLED display panels are prone to uneven display brightness due to voltage drop. Summary of the Invention

[0003] This application provides a method for determining brightness compensation data, a display device, and a driving method for the display device, which can comprehensively compensate the brightness data of each pixel, so that the determined brightness compensation data can improve the problem of uneven display brightness caused by voltage drop in the prior art.

[0004] On one hand, embodiments of this application provide a method for determining brightness compensation data, the method may include:

[0005] Local area compensation is performed on the original brightness data of different pixels to obtain the first brightness compensation data of different pixels.

[0006] Full-screen compensation is performed based on the first brightness compensation data for different pixels to obtain the second brightness compensation data for different pixels.

[0007] Optionally, local region compensation is performed on the original brightness data of different pixels to obtain the first brightness compensation data for different pixels, including:

[0008] The display device containing the pixel includes m*n display areas. Based on the area compensation relationship corresponding to the position of the display area and the original brightness data of different pixels, the first brightness compensation data of the pixels in the display area is determined.

[0009] Optionally, based on the area compensation relationship corresponding to the location of the display area and the original brightness data of different pixels, the first brightness compensation data of the pixels within the display area is determined, including:

[0010] From the area compensation relationship corresponding to the position of the display area, obtain the first compensation parameter of each display area relative to the reference area. The area compensation relationship is the brightness compensation relationship between the display area and the reference area. The reference area is the i-th row of display areas in the direction closer to the source drive circuit, i∈n;

[0011] The reference brightness data is determined by using the original brightness data of the pixels in the reference area;

[0012] The first compensation parameter of each display area relative to the reference area is added to the reference brightness data to obtain the first brightness compensation data of the pixels in the display area;

[0013] Optionally, the reference area is the first row of display areas closest to the source drive circuit.

[0014] Optionally, the steps for obtaining the regional compensation relationship include:

[0015] The display device should show the test screen;

[0016] Based on the display brightness data of different pixels in the test screen, obtain the average brightness data of pixels in each display area of ​​the test screen;

[0017] Using the average brightness data of pixels in the reference area of ​​the test screen as the baseline data, the baseline data is subtracted from the average brightness data of pixels in each display area to obtain the first compensation parameter of the display area relative to the reference area.

[0018] A brightness compensation relationship between the display area and the reference area is established based on the first compensation parameter of all display areas relative to the reference area.

[0019] Optionally, full-screen compensation is performed based on the first brightness compensation data for different pixels to obtain second brightness compensation data for different pixels, including:

[0020] The display device displays test images with different display ratios, where the display ratio is the ratio of the actual light-emitting area of ​​the display device to the light-emitting area of ​​the display device.

[0021] Based on the proportion compensation relationship and the first brightness compensation data of different pixels, the second brightness compensation data of different pixels under different display proportions are determined.

[0022] Optionally, based on the proportion compensation relationship and the first brightness compensation data for different pixels, second brightness compensation data for different pixels under different display proportions are determined, including:

[0023] From the percentage compensation relationship, find the compensation coefficient corresponding to different display percentages;

[0024] Multiply the compensation coefficient by the first brightness compensation data of different pixels to obtain the second brightness compensation data of different pixels under different display ratios;

[0025] Optionally, the steps for obtaining the percentage compensation relationship include:

[0026] Obtain the first brightness compensation data of each pixel in the test screen with different display ratios;

[0027] Calculate the mean value of the first brightness compensation data in the test screens with different display ratios;

[0028] Using the average of the first brightness compensation data in the target test screen as the reference brightness, the ratio of the reference brightness to the average of the first brightness compensation values ​​in the test screens with different display ratios is calculated to obtain the compensation coefficient of the test screens under different display ratios. The test screens under different display ratios include the target test screen.

[0029] Based on the compensation coefficients of the test images under different display ratios, the ratio compensation relationship between the display ratio and the compensation coefficients is obtained by fitting.

[0030] Optionally, the display device can display test images with different screen ratios, including:

[0031] To display a test screen with the minimum display ratio on the display device;

[0032] Using the center of the test screen with the smallest display ratio as a reference, the display ratio is gradually increased to update the test screen.

[0033] Optionally, based on the proportion compensation relationship and the first brightness compensation data for different pixels, second brightness compensation data for different pixels under different display proportions are determined, including:

[0034] From the percentage compensation relationship, find the compensation coefficients corresponding to pixels with different emitted colors under different display percentages;

[0035] Based on the light emitted by each pixel, the first brightness compensation data of different pixels is multiplied by the corresponding compensation coefficient to obtain the second brightness compensation data of different pixels under different display ratios.

[0036] On the other hand, embodiments of this application provide a display device, the display device comprising:

[0037] The first compensation module is used to perform local area compensation on the original brightness data of different pixels, thereby obtaining the first brightness compensation data of different pixels.

[0038] The second compensation module is used to perform full-screen compensation based on the first brightness compensation data of different pixels, and obtain the second brightness compensation data of different pixels.

[0039] Furthermore, embodiments of this application provide a driving method for a display device, including:

[0040] Obtain the original brightness data and display ratio of different pixels in the screen to be displayed. The display ratio is the ratio of the actual light-emitting area of ​​the display device to the light-emitting area of ​​the display device.

[0041] Based on the original brightness data of different pixels, the first brightness compensation data of different pixels is retrieved from the storage module of the display device. The first brightness compensation data is used to perform local area compensation on the screen to be displayed.

[0042] Based on the first brightness compensation data of different pixels, the second brightness compensation data of different pixels under the display ratio is retrieved from the storage module. The second brightness compensation data is used to perform local area compensation and full-screen compensation on the display screen.

[0043] Drive different pixels to display according to the second brightness compensation data of each pixel;

[0044] Optionally, based on the first brightness compensation data for different pixels, the second brightness compensation data for different pixels under the display ratio is retrieved from the storage module, including:

[0045] In the case of multiple reference ratios including the display ratio, the second brightness compensation data of different pixels under the display ratio is obtained from the storage module based on the first brightness compensation data of different pixels.

[0046] In the case where multiple reference ratios do not include the display ratio, two adjacent reference ratios are obtained, and the second brightness compensation data of different pixels under the two reference ratios is retrieved from the storage module, so as to determine the second brightness compensation data of different pixels under the display ratio through the second brightness compensation data of different pixels under the two reference ratios.

[0047] Furthermore, embodiments of this application provide a driving device for a display device, the device comprising:

[0048] The acquisition module is used to acquire the original brightness data and display ratio of different pixels in the screen to be displayed. The display ratio is the ratio of the actual light-emitting area of ​​the display device to the light-emitting area of ​​the display device.

[0049] The first search module retrieves the first brightness compensation data for different pixels from the storage module of the display device based on the original brightness data of different pixels. The first brightness compensation data is used to perform local area compensation on the screen to be displayed.

[0050] The second lookup module is used to retrieve the second brightness compensation data of different pixels under the display ratio from the storage module based on the first brightness compensation data of different pixels. The second brightness compensation data is used to perform local area compensation and full screen compensation on the screen to be displayed.

[0051] The driver module is used to drive different pixels to display according to the second brightness compensation data of different pixels.

[0052] In another aspect, embodiments of this application provide a display device, which includes a memory, a processor, and a computer program stored in the memory and running on the processor. The computer program executes the brightness compensation data determination method or the display device driving method as described above.

[0053] In another aspect, embodiments of this application provide a computer storage medium storing computer program instructions, which, when executed by a processor, implement the steps of the brightness compensation data determination method or the display device driving method described above.

[0054] In another aspect, embodiments of this application provide a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the brightness compensation data determination method or the display device driving method described above.

[0055] The brightness compensation data determination method, display device, and driving method of the display device in this application embodiment obtain first brightness compensation data for different pixels by performing local area compensation on the original brightness data of different pixels. Then, full-screen compensation is performed based on the first brightness compensation data of different pixels to finally obtain second brightness compensation data for different pixels. Since the finally determined second brightness compensation data is obtained by performing full-screen compensation on the first brightness compensation data, and the first brightness compensation data is obtained by performing local area compensation on the basis of the original brightness data, the different voltage drops during partial and overall display of the display panel are taken into account. Local area compensation and full-screen compensation are performed accordingly, so that the final compensation effect is superimposed, improving the voltage drop compensation effect and maximizing the improvement of the display effect of the display panel. Attached Figure Description

[0056] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is an optional flowchart illustrating a brightness compensation data determination method provided in one embodiment of this application;

[0058] Figure 2 This is a schematic diagram of a reference area in a brightness compensation data determination method provided in one embodiment of this application;

[0059] Figure 3 This is a schematic diagram of the optional refinement process of determining brightness compensation data for different pixels by performing local region compensation on the original brightness data of different pixels in a brightness compensation data determination method provided in one embodiment of this application.

[0060] Figure 4 This is a schematic diagram of test screens with different display ratios in a brightness compensation data determination method provided in one embodiment of this application;

[0061] Figure 5 This is a schematic diagram of the structure of a display device provided in another embodiment of this application;

[0062] Figure 6 This is a schematic diagram of the structure of a display device provided in another embodiment of this application. Detailed Implementation

[0063] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0065] With the continuous emergence of various electronic devices, the display panels used for information display and / or information interaction in electronic devices are also constantly being updated. Among them, organic light-emitting diode (OLED) display panels are gradually becoming the mainstream.

[0066] OLED display panels contain a power network composed of multiple power supply voltage lines, which provides power signals to the pixel circuits in each luminescent pixel. However, the power supply voltage lines that make up the power network are usually metal traces, which have inherent trace resistance. Due to this resistance, when the display panel is running, the current flowing through the internal power supply voltage lines will cause a voltage drop, resulting in a decrease in the power supply voltage Vdd provided by the power supply voltage lines.

[0067] Refer to the following formula for calculating the drive current, i.e., formula (1). Due to the influence of the trace resistance, the power supply voltage Vdd changes, and the drive current I... l The synchronous changes cause variations in the display brightness of certain areas of the display panel, affecting the brightness uniformity of the display panel.

[0068]

[0069] To mitigate the impact of voltage drop on the brightness uniformity of display panels, related technologies typically use averaging and iterative algorithms to compensate for the threshold voltage of the driving transistors, thereby indirectly eliminating the effects of power supply voltage drop.

[0070] During the research and development process in this field, the inventors of this application discovered that when a display panel is actually in operation, the voltage drop affecting the overall display and the display in a local area are not the same. The compensation schemes in related technologies are difficult to take into account the voltage drop effects under different conditions, so the compensation effect has certain limitations.

[0071] Furthermore, when evaluating the merits of compensation algorithms, in addition to considering the compensation effect as a key factor, the size of the amount of compensation data stored should also be taken as an important indicator. This is mainly because the size of the compensation data stored determines the cost of the chips inside the display panel. The averaging and iterative compensation methods in related technologies require a large number of complex calculations, which are difficult and consume too much computing power, thus increasing the overall cost of the panel.

[0072] Therefore, the related technologies have led to an increase in the chip cost of display panels, and the actual compensation effect of this solution is limited.

[0073] To address at least one of the aforementioned technical problems, this application provides a method for determining brightness compensation data, a display device, and a driving method for the display device. The method for determining brightness compensation data provided in this application will be described below.

[0074] Figure 1 A schematic flowchart of a brightness compensation data determination method according to an embodiment of this application is shown. Figure 1 As shown, the method for determining brightness compensation data may include the following steps:

[0075] S110, perform local area compensation on the original brightness data of different pixels to obtain the first brightness compensation data of different pixels;

[0076] S120 performs full-screen compensation based on the first brightness compensation data for different pixels to obtain the second brightness compensation data for different pixels.

[0077] In these embodiments, the final determined second brightness compensation data is obtained by performing full-screen compensation on the first brightness compensation data. The first brightness compensation data is obtained by performing local area compensation on the basis of the original brightness data. Therefore, the different voltage drops when the display panel displays locally and the whole display are taken into account, and local area compensation and full-screen compensation are performed accordingly, so that the final compensation effect is superimposed and the actual compensation effect is comprehensive, which improves the display effect of the display panel to the greatest extent.

[0078] It should also be noted that the second brightness compensation data obtained in this embodiment is the final brightness data that the display panel can use to output brightness. Subsequent output only requires looking up the different original brightness data in a table, without iterative processing. This reduces the computational load on the display panel's internal chips, indirectly reducing the cost of the display panel and its internal chips. This addresses the technical problem of increased chip costs and limited actual compensation effects caused by related technologies.

[0079] In some optional examples of S110, a test screen can be displayed on the display device when determining the brightness compensation data, thereby obtaining the original brightness data of each different pixel. This original brightness data can be the required brightness data of different pixels at different gray levels, for example, it can be the driving voltage value of different pixels, or it can be the register value corresponding to the driving voltage of the pixel.

[0080] The original brightness data of the different pixels mentioned above can also be obtained by capturing the test image using an optical charge-coupled device (CCD) camera.

[0081] The aforementioned local area compensation is a compensation method that can improve or even eliminate uneven display in local areas caused by different resistance of metal traces at different locations. For example, the aforementioned local area compensation method can make the brightness of different pixels consistent when the display device is fully displayed.

[0082] In implementation, the original brightness data of different pixels can be used to perform local area compensation on different pixels. The resulting first brightness compensation data of different pixels is the brightness data after considering and improving the uneven display of local areas. That is, assuming that the first brightness compensation data of different pixels is used for full screen display, the brightness of different pixels is consistent or approximately the same.

[0083] In some optional examples, when performing local area compensation to obtain the first brightness compensation data for different pixels, the first brightness compensation data for pixels within the display area can be determined for m*n display areas of the display device based on the area compensation relationship corresponding to the position of the display area and the original brightness data of different pixels.

[0084] In this example, the actual luminous area of ​​the display panel can be pre-divided into m*n display areas, where m and n are integers greater than or equal to 2. Here, m represents the number of display areas divided along the row direction of the display panel, and n represents the number of display areas divided along the column direction. For example, when m = 4 and n = 8, the actual luminous area of ​​the display panel is divided into 32 display areas.

[0085] The area compensation relationship corresponding to the position of the display area can be preset. This area compensation relationship can be the brightness compensation relationship between the display area and the reference area, where the reference area can be the i-th row of the display area in the direction closer to the source drive circuit, i∈n.

[0086] For example, please see Figure 2 The reference area ① can be the first row of display areas closest to the source drive circuit. Alternatively, the reference area can be one or more display areas within the first row of display areas. Of course, in other examples, the reference area can also be the second row of display areas or other row display areas closest to the source drive circuit.

[0087] It should be noted that the greater the distance between the pixel and the source drive circuit, the greater the resistance of the metal trace, and the more severe the attenuation of the power supply voltage and the impact on display brightness.

[0088] Therefore, considering that different locations are affected by voltage drops differently, a regional compensation relationship corresponding to the location of the display area can be preset. Using the reference area as a benchmark, combined with the original brightness data of different pixels, local regional compensation can be performed for each display area, thereby obtaining the first brightness compensation data of the pixels in each display area. This allows the display device to improve the problem of differences in luminous brightness between areas caused by different metal trace resistance when displaying images.

[0089] Furthermore, by setting the reference area to the first row of display areas closest to the source drive circuit, and using the display area least affected by voltage drop as a benchmark for local area brightness compensation, the accuracy of brightness display can be guaranteed.

[0090] In some optional examples, please refer to [the examples]. Figures 1 to 3 When the display device includes m*n display areas, the local area compensation of the original brightness data of different pixels in S120 above, thereby obtaining the first brightness compensation data of different pixels, may include S310 to S330.

[0091] S310: Obtain the first compensation parameter of each display area relative to the reference area from the area compensation relationship corresponding to the position of the display area.

[0092] S320 determines the reference brightness data using the original brightness data of the pixels in the reference area.

[0093] S330: Add the first compensation parameter of each display area relative to the reference area to the reference brightness data to obtain the first brightness compensation data of the pixels in the display area.

[0094] In this example, the original brightness data of the pixels in the reference area is used to confirm the reference brightness data. Combined with the first compensation parameter of each display area relative to the reference area, the first brightness compensation data of the pixel is obtained by adding the reference brightness data and the first compensation parameter. This can make up for the local brightness difference between different display areas and the reference area, overcome the influence of the local brightness difference between different display areas when the display device displays the same picture in the future, and make the brightness of different pixels in the picture consistent, which can improve the display uniformity and display effect of the display panel.

[0095] It should be noted that the aforementioned regional compensation relationship can be obtained by detecting the brightness difference between each display area and the reference area in the test screen. Correspondingly, the regional compensation relationship corresponding to the position of the display area stores a first compensation parameter, which can compensate for the brightness difference between each display area and the reference area.

[0096] In some alternative examples, the regional compensation relationship can also be the brightness compensation relationship between each display area at different gray levels relative to the reference area. This allows the identification of a first compensation parameter for each display area based on its gray level. By distinguishing the first compensation parameters at different gray levels, precise compensation for local brightness differences at different gray levels is achieved.

[0097] In some alternative examples, during the subsequent display device driving and display, the area compensation relationship corresponding to the position of the display area can be directly utilized. The original brightness data of each pixel in the image to be displayed is added to the first compensation parameter at the corresponding position to obtain all the first brightness compensation data that ensures consistent brightness across different pixels in the same image. In this example, local area compensation using the area compensation relationship corresponding to the position of the display area can maintain consistent brightness across different pixels in the image, improving display uniformity.

[0098] To achieve local brightness compensation in different display areas of the same image, in addition to obtaining the brightness difference between different display areas relative to the reference area, it is also necessary to obtain relatively accurate brightness data for the current reference area. Therefore, the original brightness data of the pixels in the reference area can be obtained from the original brightness data of different pixels, and the reference brightness data can be determined based on this. Then, the reference brightness data is added to the first compensation parameter for different display areas to obtain the first brightness compensation data for the pixels in different display areas.

[0099] The reference brightness data of the reference area can be the average brightness of the reference area, which can be the mean of the original brightness data of the pixels in the reference area.

[0100] The steps for obtaining the aforementioned regional compensation relationship may include: displaying a test screen on the display device; obtaining the average brightness data of pixels in each display area of ​​the test screen based on the display brightness data of different pixels in the test screen; using the average brightness data of pixels in a reference area of ​​the test screen as the reference data, subtracting the reference data from the average brightness data of pixels in each display area to obtain a first compensation parameter of the display area relative to the reference area; and establishing a brightness compensation relationship between the display area and the reference area based on the first compensation parameters of all display areas relative to the reference area.

[0101] The actual luminous area and the luminous area of ​​the test screen can be the same, meaning the test screen can be a full display screen. When displaying the test screen, an optical charge-coupled device (OCD) camera can be used to capture images of the full-range test screen to obtain the display brightness data of different pixels under the full display test screen.

[0102] According to different display areas in the test screen, the average brightness data of pixels in each display area can be calculated. Then, based on the average brightness data of the reference area, the difference between the average brightness data of each display area and the reference area can be obtained. This difference is used as the first compensation parameter between each display area and the reference area. The brightness compensation relationship between the display area and the reference area can be constructed through all the first compensation parameters.

[0103] These examples illustrate the process of obtaining the regional compensation relationship corresponding to the location of the displayed area, providing a data foundation for subsequent local regional compensation.

[0104] In other optional examples, test images at different gray levels can be displayed to measure the regional compensation relationship corresponding to the position of the display area at different gray levels. Subsequently, when obtaining the first brightness compensation data for different pixels, the first compensation parameters for each display area at different gray levels can be obtained based on the regional compensation relationship corresponding to the position of the display area at the corresponding gray level. Finally, accurate first brightness compensation data for different pixels at different gray levels can be obtained. This takes into account the local area compensation differences at different gray levels, and can better achieve local brightness difference compensation.

[0105] In some optional examples of the S120, full-screen compensation can improve or even eliminate the problem of brightness display differences in the actual light-emitting area caused by different display ratios, making the brightness of pixels approximately or consistently high under different display ratios.

[0106] The implementation is based on improving the brightness difference in local areas. That is, the first brightness compensation data of different pixels can be used to compensate the whole screen for different pixels. The second brightness compensation data of each pixel is the brightness data after comprehensively considering and improving the uneven display in local areas and the brightness difference of the whole screen.

[0107] For example, suppose that the second brightness compensation data of different pixels shows a screen with a certain display ratio. At this time, the brightness of different pixels in the screen is the same, and under the same display brightness level and grayscale, the average brightness of the screen with this display ratio is the same as the average brightness of the screen with other display ratios.

[0108] In some optional examples, performing full-screen compensation based on the first brightness compensation data of different pixels to obtain the second brightness compensation data of different pixels under different proportions may include: displaying test images with different display proportions on the display device; and determining the second brightness compensation data of different pixels under different display proportions based on the proportion compensation relationship and the first brightness compensation data of different pixels.

[0109] The aforementioned display ratio can be the ratio of the actual light-emitting area to the light-emitting area of ​​the display device. The actual light-emitting area refers to the area of ​​the display device that is actually illuminated, while the light-emitting area refers to the area of ​​the display device that can emit light. For example, the display ratio can be calculated based on the areas of the actual light-emitting area and the light-emitting area.

[0110] In some optional examples, the actual light-emitting area and the light-emitting area can have the same center position, and the switching of the actual light-emitting area can also be based on the center position and vary according to the display ratio.

[0111] For example, when the display ratio is 1, it indicates that the actual light-emitting area of ​​the current display device is the same as the light-emitting area; when the display ratio is 0.3, it indicates that the actual light-emitting area of ​​the current display device is one-third of the light-emitting area.

[0112] The aspect ratio compensation relationship can also be preset, which records the compensation coefficients of pixels under different display aspect ratios. It should be noted that when displaying images with different aspect ratios, the larger the ratio of the actual light-emitting area to the light-emitting area, the greater the impact of voltage drop on the overall image, and the more severe the brightness difference of the image.

[0113] Therefore, based on local area compensation for each display area, and considering the different voltage drops caused by metal traces in the display of different display ratios, secondary compensation is performed on the brightness data of pixels globally based on the ratio compensation relationship. The resulting second brightness compensation data for different pixels is the result of the superposition of local area compensation and full-screen compensation, which can compensate for the brightness differences in local areas of the same screen and the impact of voltage drops under different display ratios, thereby improving the display effect of the display panel.

[0114] As an optional example, the process of determining the second brightness compensation data for different pixels under different display ratios, based on the ratio compensation relationship and the first brightness compensation data for different pixels, may include:

[0115] From the percentage compensation relationship, find the compensation coefficient corresponding to different display percentages. Multiply the compensation coefficient by the first brightness compensation data of different pixels to obtain the second brightness compensation data of different pixels under different display percentages.

[0116] In this example, based on different display ratios, the compensation coefficients corresponding to different display ratios were determined from the ratio compensation relationship. Combined with the first brightness compensation data of different pixels in all display areas of the display device, the second brightness compensation data of different pixels under different display ratios of the display device was obtained by multiplying the compensation coefficients with the first brightness data. This can compensate for the local brightness differences in different display areas and take into account the problem of different overall voltage drops of the screen under different display ratios, thereby improving the display uniformity of the screen when the display device displays the image.

[0117] In some other optional examples, the percentage compensation relationship can also record the compensation coefficients corresponding to pixels of different emitted colors under different percentages.

[0118] At this point, based on the percentage compensation relationship and the first brightness compensation data of different pixels, the second brightness compensation data of different pixels under different display percentages can be determined. This can include: finding the compensation coefficients corresponding to pixels with different light-emitting colors under different display percentages from the percentage compensation relationship; multiplying the first brightness compensation data of different pixels by the corresponding compensation coefficients according to the light-emitting color of the pixels to obtain the second brightness compensation data of different pixels under different display percentages.

[0119] In these examples, by distinguishing pixels with different light-emitting colors and setting corresponding compensation coefficients, the differences in the influence of current on pixels with different light-emitting colors are taken into account, ensuring the uniformity of display brightness of pixels with different light-emitting colors and achieving accurate compensation.

[0120] In some alternative examples, the proportion compensation relationship can also record the compensation coefficients corresponding to pixels at different gray levels (different emitted light colors).

[0121] It should also be noted that the above-mentioned ratio compensation relationship can be obtained by processing the first brightness compensation data after local area compensation of different pixels under test screens with different display ratios.

[0122] For example, the process of obtaining the above-mentioned proportion compensation relationship may include S410 to S440.

[0123] S410, acquires the first brightness compensation data of each pixel in the test screen with different display ratios;

[0124] S420 calculates the average value of the first brightness compensation data in test screens with different display ratios;

[0125] S430, taking the average of the first brightness compensation data in the target test screen as the reference brightness, calculate the ratio of the reference brightness to the average of the first brightness compensation values ​​in the test screens with different display ratios, and obtain the compensation coefficient of the test screens under different display ratios, including the target test screen.

[0126] S440 uses the compensation coefficients of test images with different display ratios to fit the ratio compensation relationship between the display ratio and the compensation coefficients.

[0127] The process of displaying test images with different display ratios on the display device can be performed according to actual needs. For example, taking the adjustment of test images with different display ratios based on the center position as an example, the display device can first display the test image with the smallest display ratio, and then, based on the center position of the test image with the smallest display ratio, the display ratio can be gradually increased to update the test image.

[0128] Each time the test screen is updated, the display brightness data of different pixels in the test screen can be measured, and the first brightness compensation data of different pixels in the test screen with the current display ratio can be obtained through local area compensation.

[0129] In this example, the test screen with the smallest display area is displayed first as the smallest test screen. For example, please refer to [link to example]. Figure 4 The test screen with the smallest display area (i.e. Figure 4 The center position (②) can consist of only 2*2 pixels, in which case it is also necessary to ensure that all other pixels are off. Subsequently, the actual luminous area of ​​the test screen can be expanded based on the same center position (i.e., Figure 4 Different sized square areas are used to simultaneously ensure that pixels in other displayable areas outside the actual light-emitting area are turned off, thereby increasing the display ratio.

[0130] For example, after increasing the display ratio, the actual light-emitting area in the test screen can be composed of A*A or A*B pixels, where A and B can be positive integers greater than 2. For example, the actual light-emitting area can be composed of 3*3, 3*4 or 4*3 pixels.

[0131] It should be noted that the first brightness compensation data of different pixels in each test screen is the ideal brightness data of the pixels after making up for the local brightness difference. However, there is still the problem that the voltage drop caused by different display ratios is different, which makes the overall display brightness different. Therefore, the average value of the first brightness compensation data of the pixels in the entire actual light-emitting area can be calculated when each test screen is displayed, so as to obtain the overall average brightness of different test screens.

[0132] A test screen with a specific display ratio can be used as the target test screen. For example, the target test screen could be a test screen with a display ratio of 1. Then, the overall average brightness of the target test screen is used as the reference brightness. By calculating the ratio of the reference brightness to the overall average brightness of all test screens, the compensation coefficient for each display ratio can be obtained.

[0133] It should also be noted that the generation process for the proportion of compensation coefficients corresponding to pixels at different gray levels (different emitted light colors) can also be referenced in the settings, which will not be elaborated on here.

[0134] The above example illustrates the process of obtaining the percentage compensation relationship, providing a data foundation for subsequent full-screen compensation.

[0135] After determining the brightness compensation data, we can obtain the first brightness compensation data for different pixels and the second brightness compensation data for different pixels under different display ratios. The determined brightness compensation data can be stored in the storage module of the display panel, such as the flash memory chip of the display panel.

[0136] Subsequently, the second brightness compensation data for different pixels can be output by looking up the table, so that different pixels can adjust the driving voltage value according to the corresponding second brightness compensation data to achieve brightness display. This allows the final output display to improve the problem of uneven brightness caused by voltage drop from both local and overall perspectives, thereby improving the display effect.

[0137] At this time, the driving process of the display device can refer to the following steps S510 to S540.

[0138] S510, obtain the original brightness data and display ratio of different pixels in the screen to be displayed. The display ratio is the ratio of the actual light-emitting area of ​​the display device to the light-emitting area of ​​the display device.

[0139] S520 retrieves the first brightness compensation data for different pixels from the storage module of the display device based on the original brightness data of different pixels. The first brightness compensation data is used to perform local area compensation on the screen to be displayed.

[0140] S530 retrieves the second brightness compensation data for different pixels under the display ratio from the storage module based on the first brightness compensation data for different pixels. The second brightness compensation data is used to perform local area compensation and full-screen compensation on the display screen.

[0141] The S540 drives different pixels to display according to the second brightness compensation data of each pixel.

[0142] In some alternative examples, the above S530 may include:

[0143] S531, when multiple reference ratios include the display ratio, retrieves the second brightness compensation data of different pixels under the display ratio from the storage module based on the first brightness compensation data of different pixels;

[0144] S532, when multiple reference percentages do not include the display percentage, obtain two adjacent reference percentages of the display percentage, and retrieve the second brightness compensation data of different pixels under the two reference percentages from the storage module, so as to determine the second brightness compensation data of different pixels under the display percentage through the second brightness compensation data of different pixels under the two reference percentages.

[0145] The aforementioned multiple reference ratios can be different display ratios involved in the test screen during full-screen compensation in the process of determining brightness compensation data. For example, the multiple reference ratios can include S1, S2, S3 to Sn. When the display ratio of the screen to be displayed is not among the multiple reference ratios, the two closest adjacent reference ratios can be found. For example, if the display ratio is between S3 and S4, then the two reference ratios are S3 and S4.

[0146] This example differentiates between cases based on whether the storage module contains display ratio data related to full-screen compensation. For cases with multiple reference ratios, including display ratio, the aforementioned driving method can be used for implementation.

[0147] If the storage module does not contain brightness compensation data related to the display ratio of the image to be displayed, two adjacent reference ratios can be found based on the display ratio of the image to be displayed. Then, the second brightness compensation data for different pixels under the two reference ratios can be obtained. Finally, using interpolation principles, the second brightness compensation data for different pixels under the two reference ratios can be substituted into the interpolation formula to obtain the second brightness compensation data for each pixel under the display ratio of the image to be displayed. This is applicable to different display modes of the display panel, has a wide range of uses, and improves the uniformity of the display panel.

[0148] Figure 5 A schematic diagram of the hardware structure of the display device provided in an embodiment of this application is shown. Figure 5 The display device includes:

[0149] The first compensation module 510 is used to perform local area compensation on the original brightness data of different pixels, thereby obtaining the first brightness compensation data of different pixels.

[0150] The second compensation module 520 is used to perform full-screen compensation based on the first brightness compensation data of different pixels to obtain the second brightness compensation data of different pixels.

[0151] Optionally, the display device where the pixel is located includes m*n display areas. The first compensation module 510 can be used to determine the first brightness compensation data of the pixel in the display area based on the area compensation relationship corresponding to the position of the display area and the original brightness data of different pixels.

[0152] Optionally, the first compensation module 510 may include:

[0153] The first acquisition unit can be used to acquire the first compensation parameter of each display area relative to the reference area from the area compensation relationship corresponding to the position of the display area. The area compensation relationship is the brightness compensation relationship between the display area and the reference area. The reference area is the i-th row of display areas in the direction closer to the source driving circuit, i∈n.

[0154] The first determining unit can be used to determine the reference brightness data using the original brightness data of the pixels in the reference area;

[0155] The arithmetic unit can be used to add the first compensation parameter of each display area relative to the reference area to the reference brightness data to obtain the first brightness compensation data of the pixels in the display area.

[0156] Optionally, the reference area is the first row of display areas closest to the source drive circuit.

[0157] Optionally, the steps for obtaining the regional compensation relationship include:

[0158] The display device should show the test screen;

[0159] Based on the display brightness data of different pixels in the test screen, obtain the average brightness data of pixels in each display area of ​​the test screen;

[0160] Using the average brightness data of pixels in the reference area of ​​the test screen as the baseline data, the baseline data is subtracted from the average brightness data of pixels in each display area to obtain the first compensation parameter of the display area relative to the reference area.

[0161] A brightness compensation relationship between the display area and the reference area is established based on the first compensation parameter of all display areas relative to the reference area.

[0162] Optionally, the second compensation module 520 may include:

[0163] The display unit can be used to display test images with different display ratios. The display ratio is the ratio of the actual light-emitting area of ​​the display device to the light-emitting area of ​​the display device.

[0164] The second determining unit can be used to determine the second brightness compensation data of different pixels under different display ratios based on the ratio compensation relationship and the first brightness compensation data of different pixels.

[0165] Optionally, the second determining unit can be used to find the compensation coefficients corresponding to different display ratios from the ratio compensation relationship; and multiply the compensation coefficients by the first brightness compensation data of different pixels to obtain the second brightness compensation data of different pixels under different display ratios.

[0166] Optionally, the steps for obtaining the percentage compensation relationship include:

[0167] Obtain the first brightness compensation data of each pixel in the test screen with different display ratios;

[0168] Calculate the mean value of the first brightness compensation data in the test screens with different display ratios;

[0169] Using the average of the first brightness compensation data in the target test screen as the reference brightness, the ratio of the reference brightness to the average of the first brightness compensation values ​​in the test screens with different display ratios is calculated to obtain the compensation coefficient of the test screens under different display ratios. The test screens under different display ratios include the target test screen.

[0170] Based on the compensation coefficients of the test images under different display ratios, the ratio compensation relationship between the display ratio and the compensation coefficients is obtained by fitting.

[0171] Optionally, the display unit can be used to enable the display device to display a test screen with the minimum display ratio; based on the center position of the test screen with the minimum display ratio, the display ratio is gradually increased to update the test screen.

[0172] Optionally, the second determining unit can be used to find the compensation coefficients corresponding to pixels with different light-emitting colors under different display ratios from the ratio compensation relationship; and multiply the first brightness compensation data of different pixels with the corresponding compensation coefficients according to the light-emitting color of the pixels to obtain the second brightness compensation data of different pixels under different display ratios.

[0173] Figure 6 A schematic diagram of the hardware structure of a display device provided in an embodiment of this application is shown. The display device can be at least one of a display panel (e.g., an OLED display panel), a chip within the display panel, a home appliance, a wearable device, a mobile terminal, a virtual display device, and a display device in an automobile. The display device includes a processor 601 and a memory 602 storing computer program instructions.

[0174] Specifically, the processor 601 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0175] Memory 602 may include mass storage for data or instructions. For example, and not limitingly, memory 602 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where suitable, memory 602 may include removable or non-removable (or fixed) media. Where suitable, memory 602 may be internal or external to a display device. In a particular embodiment, memory 602 is a non-volatile solid-state memory.

[0176] Memory 602 may include read-only memory (ROM), flash memory device, random access memory (RAM), disk storage medium device, optical storage medium device, electrical, optical, or other physical / tangible memory storage device. Therefore, typically, memory 602 includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) that may be encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the methods described above according to the foregoing aspects of this disclosure.

[0177] The processor 601 reads and executes computer program instructions stored in the memory 602 to implement any of the brightness compensation data determination methods or display device driving methods in the above embodiments.

[0178] In one example, the display device may further include a communication interface 603 and a bus 610. Wherein, as... Figure 6 As shown, the processor 601, memory 602, and communication interface 603 are connected through bus 610 and complete communication with each other.

[0179] The communication interface 603 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of this application.

[0180] Bus 610 includes hardware, software, or both, that couples components of a display device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 610 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, any suitable bus or interconnect is contemplated herein.

[0181] The display device can achieve a combination based on a brightness compensation data determination method or a display device driving method. Figures 1 to 5 The method for determining brightness compensation data and the display device described herein, or the driving method for implementing the display device.

[0182] Furthermore, in conjunction with the brightness compensation data determination method and the display device driving method in the above embodiments, this application embodiment can provide a computer storage medium for implementation. This computer storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the methods in the above embodiments.

[0183] In addition, this application also provides a computer program product, including a computer program that, when executed by a processor, can implement the steps and corresponding content of the aforementioned brightness compensation data determination method or display device driving method embodiments.

[0184] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0185] It should be understood that in the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0186] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A luminance compensation data determination method characterized by comprising: The method comprises: performing local area compensation on the original luminance data of different pixel points, thereby obtaining first luminance compensation data of different pixel points; performing full-screen compensation according to the first luminance compensation data of different pixel points, thereby obtaining second luminance compensation data of different pixel points. The display device in which the pixel points are located comprises m*n display areas, and the method of performing local area compensation on the original luminance data of different pixel points, thereby obtaining first luminance compensation data of different pixel points, comprises: obtaining, from a region compensation relationship corresponding to the position of the display area, a first compensation parameter of each display area relative to a reference area, the region compensation relationship being a luminance compensation relationship between the display area and the reference area, and the reference area being an i-th row of display area close to the direction of the source driving circuit, i∈n; determining reference luminance data through the original luminance data of the pixel points in the reference area; adding the first compensation parameter of each display area relative to the reference area and the reference luminance data, thereby obtaining the first luminance compensation data of the pixel points in the display area.

2. The method of claim 1, wherein, The reference area is a first row of display area close to the direction of the source driving circuit.

3. The method of claim 1, wherein, The obtaining step of the region compensation relationship comprises: displaying a test picture by the display device; obtaining average luminance data of the pixel points in each display area in the test picture according to display luminance data of different pixel points in the test picture; subtracting the average luminance data of the pixel points in each display area from reference data, thereby obtaining the first compensation parameter of the display area relative to the reference area, the reference data being the average luminance data of the pixel points in the reference area in the test picture; establishing a luminance compensation relationship between the display area and the reference area according to the first compensation parameter of all the display areas relative to the reference area.

4. The method of claim 1, wherein, The method of performing full-screen compensation according to the first luminance compensation data of different pixel points, thereby obtaining second luminance compensation data of different pixel points, comprises: displaying test pictures with different display ratios by the display device, the display ratio being the ratio of the actual light-emitting area of the display device to the light-emitting area of the display device; determining second luminance compensation data of different pixel points under different display ratios according to a ratio compensation relationship and the first luminance compensation data of different pixel points.

5. The method of claim 4, wherein, The method of determining second luminance compensation data of different pixel points under different display ratios according to a ratio compensation relationship and the first luminance compensation data of different pixel points, comprises: finding compensation coefficients corresponding to different display ratios from the ratio compensation relationship; multiplying the compensation coefficients and the first luminance compensation data of different pixel points, thereby obtaining second luminance compensation data of different pixel points under different display ratios.

6. The method of claim 5, wherein, The obtaining step of the ratio compensation relationship comprises: obtaining first luminance compensation data of each pixel point in the test picture with different display ratios; respectively calculate the mean value of the first luminance compensation data in the test picture of different display ratios; respectively calculate the ratio of the reference luminance to the mean value of the first luminance compensation data in the test picture of different display ratios, to obtain the compensation coefficient of the test picture under different display ratios, wherein the reference luminance is the mean value of the first luminance compensation data in the target test picture, and the test picture under different display ratios includes the target test picture; fit the display ratio-compensation coefficient relationship according to the compensation coefficients of the test picture under different display ratios.

7. The method of claim 6, wherein, The method comprises: displaying the test picture of the minimum display ratio on the display device; gradually increasing the display ratio based on the center position of the test picture of the minimum display ratio to update the test picture.

8. The method of claim 5, wherein, The method comprises: finding the compensation coefficient corresponding to the pixel point of different light-emitting colors under different display ratios from the ratio compensation relationship; multiplying the first luminance compensation data of different pixel points by the corresponding compensation coefficient according to the light-emitting color of the pixel point to obtain the second luminance compensation data of different pixel points under different display ratios.

9. A display device, characterized by comprising: The display device comprises: a first compensation module configured to perform local area compensation on the original luminance data of different pixel points to obtain the first luminance compensation data of different pixel points; a second compensation module configured to perform full-picture compensation according to the first luminance compensation data of different pixel points to obtain the second luminance compensation data of different pixel points. The display device comprises m*n display areas, and the original luminance data of different pixel points is compensated in local areas to obtain the first luminance compensation data of different pixel points, which comprises: obtaining the first compensation parameter of each display area relative to the reference area from the area compensation relationship corresponding to the position of the display area, wherein the area compensation relationship is the luminance compensation relationship between the display area and the reference area, and the reference area is the ith row of display area close to the source driving circuit direction, i∈n; determining the reference luminance data through the original luminance data of the pixel point in the reference area; adding the first compensation parameter of each display area relative to the reference area to the reference luminance data to obtain the first luminance compensation data of the pixel point in the display area.

10. A driving method of a display device, comprising: The method comprises: obtaining the original luminance data and display ratio of different pixel points in the to-be-displayed picture, wherein the display ratio is the ratio of the actual light-emitting area of the display device to the light-emitting area of the display device; finding the first luminance compensation data of different pixel points from the storage module of the display device according to the original luminance data of different pixel points, wherein the first luminance compensation data is used for local area compensation on the to-be-displayed picture. According to the first luminance compensation data of different pixel points, the second luminance compensation data of different pixel points under the display ratio is found from the storage module, and the second luminance compensation data is used for local area compensation and full picture compensation of the to-be-displayed picture. Different pixel points are driven to display according to the second luminance compensation data of different pixel points.

11. The driving method of a display device according to claim 10, wherein The second luminance compensation data of different pixel points under the display ratio is found from the storage module according to the first luminance compensation data of different pixel points, and the second luminance compensation data is used for local area compensation and full picture compensation of the to-be-displayed picture. In the case that the multiple reference ratios include the display ratio, the second luminance compensation data of different pixel points under the display ratio is found from the storage module according to the first luminance compensation data of different pixel points. In the case that the multiple reference ratios do not include the display ratio, two reference ratios adjacent to the display ratio are obtained, and the second luminance compensation data of different pixel points under the two reference ratios is found from the storage module, so as to determine the second luminance compensation data of different pixel points under the display ratio through the second luminance compensation data of different pixel points under the two reference ratios.

12. A display device comprising: The display device includes a memory, a processor, and a computer program stored in the memory and running on the processor, and the computer program executes the luminance compensation data determination method of any one of claims 1-8 or the driving method of the display device of claims 10-11.

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