Display panel, compensation data determination method thereof and brightness debugging system

Abstract

The embodiment of the invention discloses a display panel and a compensation data determination method and a brightness debugging system thereof, which are characterized in that under the condition that a brightness abnormal area exists in a debugging picture under original brightness data, the original brightness data of the brightness abnormal area is corrected by adopting a debugging gain parameter different from a public version gain parameter; and determining compensation data corresponding to the plurality of pixels according to the corrected brightness data, so that the brightness uniformity of the display panel under the debugging picture meets the target uniformity requirement after the pixels are compensated by the corresponding compensation data. By adopting the debugging gain parameter different from the public version gain parameter to correct the original brightness data of the brightness abnormal area, the problems that the public version gain parameter cannot be matched with the brightness abnormal area of the abnormal display panel, so that the determined compensation data is inaccurate, and the compensation effect is poor are solved, the display uniformity is improved, and the display quality is improved. And user experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a compensation data determination method and a brightness adjustment system thereof. BACKGROUND

[0002] With the development of display technology, users have higher and higher requirements for picture display effect.

[0003] In the prior art, the display panel has poor display uniformity, which leads to poor display effect and affects user experience. SUMMARY

[0004] The present application provides a compensation data determination method, a brightness compensation method and a brightness adjustment system for a display panel, so as to obtain compensation data matched with the display panel, so that the brightness uniformity of the display panel is improved after compensation by the compensation data, and user experience is improved.

[0005] According to an aspect of the present application, a compensation data determination method for a display panel is provided, comprising:

[0006] In the case that the debug picture has a luminance abnormal area under the original luminance data, a debug gain parameter different from the public gain parameter is used to correct the original luminance data of the luminance abnormal area, so as to obtain corrected luminance data;

[0007] The compensation data corresponding to the plurality of pixels is determined according to the corrected luminance data, so that the brightness uniformity of the display panel under the debug picture after compensation by the corresponding compensation data meets the target uniformity requirement;

[0008] The luminance abnormal area includes abnormal pixel points, and the difference between the luminance of the abnormal pixel points and the set normal luminance is within a preset abnormal luminance range; the debug gain parameter is configured to increase or decrease the original luminance data corresponding to the luminance abnormal area; the public gain parameter is obtained based on luminance adjustment of at least one normal display panel, and the normal display panel does not have a luminance abnormal area under the debug picture.

[0009] Optionally, before the correction of the original luminance data of the luminance abnormal area by using the debug gain parameter different from the public gain parameter to obtain the corrected luminance data in the case that the debug picture has a luminance abnormal area under the original luminance data, the method further comprises:

[0010] Obtaining the original luminance data of the display panel under the debug picture, wherein the original luminance data includes the luminance of the plurality of pixels of the display panel under the original driving data;

[0011] According to the original brightness data of the debugging picture, if there is a brightness abnormal area in the debugging picture, the original brightness data is corrected by using a debugging gain parameter different from the public gain parameter in the brightness abnormal area to obtain corrected brightness data, comprising:

[0012] According to the original brightness data, it is determined whether there is a brightness abnormal area in the debugging picture;

[0013] If yes, the original brightness data is corrected by using a debugging gain parameter different from the public gain parameter in the brightness abnormal area to obtain corrected brightness data;

[0014] Optionally, according to the corrected brightness data, compensation data corresponding to a plurality of pixels is determined, so that after the pixels are compensated by the corresponding compensation data, the brightness uniformity of the display panel under the debugging picture meets the target uniformity requirement, and the compensation data is stored to the display panel.

[0015] Optionally, according to the corrected brightness data, compensation data corresponding to a plurality of pixels is determined, comprising:

[0016] According to the corrected brightness data, compensation data corresponding to a plurality of pixels is determined, and the compensation data is sent to the driving chip of the display panel, so that the driving chip drives the display panel to display according to the compensation data and the original driving data to obtain intermediate brightness data;

[0017] According to the intermediate brightness data, if there is a brightness abnormal area, the step of correcting the original brightness data by using a debugging gain parameter different from the public gain parameter in the brightness abnormal area to obtain corrected brightness data is returned until there is no brightness abnormal area in the compensation data corresponding to the corrected brightness data; wherein the debugging gain parameter called each time is different;

[0018] According to the compensation data corresponding to the corrected brightness data when there is no brightness abnormal area, the final compensation data is determined.

[0019] Optionally, the abnormal brightness range includes a value greater than a first preset threshold or a value less than the first preset threshold; in the case that there is a brightness abnormal area in the debugging picture under the original brightness data, the original brightness data is corrected by using a debugging gain parameter different from the public gain parameter in the brightness abnormal area to obtain corrected brightness data, comprising:

[0020] According to the original brightness data, if there is a brightness abnormal area in the debugging picture, the original brightness data is corrected by using a debugging gain parameter different from the public gain parameter in the brightness abnormal area to obtain corrected brightness data, comprising:

[0021] The difference between the luminance of the abnormal pixel point and the set normal luminance is greater than a first preset threshold in the over-bright area; the difference between the luminance of the abnormal pixel point and the set normal luminance is greater than a first preset threshold in the over-dark area; the first debugging gain parameter and the second debugging gain parameter are different;

[0022] Optionally, the first debugging gain parameter includes at least two, and / or the second debugging gain parameter includes at least two;

[0023] Optionally, the first debugging gain parameter is less than the public gain parameter, and the second debugging gain parameter is greater than the public gain parameter; or, the first debugging gain parameter is greater than the public gain parameter, and the second debugging gain parameter is less than the public gain parameter; or, the first debugging gain parameter and the second debugging gain parameter are both greater than the public gain parameter or both less than the public gain parameter.

[0024] Optionally, in the case that the debugging picture has a luminance abnormal area under the original luminance data, before the modified luminance data is obtained by correcting the original luminance data using the debugging gain parameter different from the public gain parameter in the luminance abnormal area, the method further comprises:

[0025] A plurality of first poor display panels are selected, and the first poor display panel has an over-bright area under the debugging picture;

[0026] A different debugging gain parameter is used for luminance debugging of the over-bright area in each first poor display panel, and the debugging gain parameter when there is no abnormal pixel point in the over-bright area is determined as the first debugging gain parameter;

[0027] A plurality of second poor display panels are selected, and the second poor display panel has an over-dark area under the debugging picture;

[0028] A different debugging gain parameter is used for luminance debugging of the over-dark area in each second poor display panel, and the debugging gain parameter when there is no abnormal pixel point in the over-dark area is determined as the second debugging gain parameter.

[0029] Optionally, the compensation data determination method of the display panel further comprises: in the case that the debugging picture has a luminance normal area under the original luminance data, the original luminance data is corrected using the public gain parameter in the luminance normal area to obtain the modified luminance data; wherein, in the luminance normal area, the difference between the luminance of each pixel and the set normal luminance is outside the preset abnormal luminance range; under the compensation data corresponding to the public gain parameter, the luminance uniformity of the normal display panel under the debugging picture satisfies the target uniformity requirement;

[0030] Optionally, the compensation data corresponding to the plurality of pixels is determined according to the modified luminance data, comprising:

[0031] Based on the corrected brightness data of the normal brightness area and the corrected brightness data of the abnormal brightness area, the compensation data corresponding to multiple pixels in the abnormal brightness area and the normal brightness area are determined.

[0032] Optionally, the method for determining the compensation data of the display panel may also include:

[0033] Based on the original brightness data, and assuming there are no areas of abnormal brightness in the test screen, the original brightness data of the display panel is corrected using the reference gain parameters to obtain corrected brightness data.

[0034] Optionally, the normal brightness setting is based on the brightness data corresponding to the debugging screen;

[0035] And / or, the preset abnormal brightness range includes values ​​greater than the first preset threshold or less than the opposite of the first preset threshold; the target uniformity requirement is that, under the debugging screen, the brightness difference between the maximum brightness pixel and the minimum brightness pixel is less than the second preset threshold, and the second preset threshold is less than the first preset threshold.

[0036] Optionally, the normal brightness can be set to the brightness of the center pixel of the display panel, or the average brightness of multiple pixels.

[0037] According to another aspect of the present invention, a display panel is provided, wherein brightness compensation is performed using compensation data determined by the compensation data determination method of any embodiment of the present invention.

[0038] According to another aspect of the present invention, a brightness adjustment system for a display panel is provided, comprising an adjustment computer and a photographic device, wherein the adjustment computer is connected to the photographic device and the display panel respectively;

[0039] The debugging computer is used to determine the presence of abnormal brightness areas in the debugging screen based on the original brightness data. In this case, the debugging gain parameters, which are different from the public version gain parameters, are used to correct the original brightness data in the abnormal brightness areas to obtain corrected brightness data.

[0040] Based on the corrected brightness data of the brightness abnormal area, the compensation data corresponding to multiple pixels in the brightness abnormal area is determined so that after the pixels are compensated by the corresponding compensation data, the brightness uniformity of the display panel under the test screen meets the target uniformity requirements.

[0041] The abnormal brightness area includes abnormal pixels, and the difference between the brightness of the abnormal pixels and the set normal brightness is within the preset abnormal brightness range; the adjustment gain parameter is configured to increase or decrease the original brightness data corresponding to the abnormal brightness area; the public gain parameter is obtained based on the brightness adjustment of at least one normal display panel, and the normal display panel does not have an abnormal brightness area in the adjustment screen; the camera is used to capture the adjustment screen to obtain the original brightness data.

[0042] The display panel and its compensation data determination method and brightness adjustment system of this invention, when there are abnormal brightness areas in the adjustment screen under the original brightness data, correct the original brightness data for the abnormal brightness areas using an adjustment gain parameter different from the reference gain parameter to obtain corrected brightness data. Based on the corrected brightness data, compensation data is determined for multiple pixels so that after the pixels are compensated with the corresponding compensation data, the brightness uniformity of the display panel in the adjustment screen meets the target uniformity requirements. By using an adjustment gain parameter different from the reference gain parameter to correct the original brightness data for the abnormal brightness areas, the problem of inaccurate compensation data and poor compensation effect caused by the inability of the reference gain parameter to match the abnormal brightness areas of the display panel is avoided. This ensures that the determined compensation data matches the required brightness compensation level for the abnormal brightness areas of the display panel, thereby improving display uniformity, enhancing the display effect of the display panel, and improving the user experience.

[0043] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of a brightness adjustment system for a display panel provided in an embodiment of the present invention;

[0046] Figure 2 This is a flowchart of a method for determining compensation data for a display panel according to an embodiment of the present invention;

[0047] Figure 3 This is a flowchart of another method for determining compensation data for a display panel provided in an embodiment of the present invention;

[0048] Figure 4 This is a flowchart of another method for determining compensation data for a display panel provided in an embodiment of the present invention;

[0049] Figure 5 This is a flowchart of another method for determining compensation data for a display panel provided in an embodiment of the present invention. Detailed Implementation

[0050] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0051] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0052] As described in the background section, existing display panels suffer from poor uniformity, resulting in subpar display quality and negatively impacting user experience. The inventors have discovered that this problem arises because existing technologies, during Demura (brightness uniformity elimination), employ a camera to capture a test image, obtaining brightness data from that image. Then, the same reference gain parameters are applied to different display panels to correct the captured brightness data, resulting in corrected brightness data. For example, the brightness data in brighter areas is increased, while the brightness data in darker areas is decreased; or vice versa. Compensation data for the corresponding pixels in the display panel is then derived based on this corrected brightness data. However, on one hand, the reference gain parameters are not applicable to some display panels; on the other hand, when correcting brightness data using the reference gain parameters, the parameters correct the brightness data of the entire display panel. This means that after correcting overly bright or dark areas of the display panel using the reference gain parameters, the compensation data for those areas is less effective, ultimately leading to poor display quality and a negative user experience.

[0053] To address the aforementioned problems, this invention provides a method for determining compensation data for a display panel, which is applied to a brightness adjustment system for a display panel. Figure 1 This is a schematic diagram of the structure of a brightness adjustment system for a display panel provided in an embodiment of the present invention. (Refer to...) Figure 1The brightness adjustment system includes an adjustment computer 10 and a photographing device 20. The photographing device 20 can be a camera. The adjustment computer 10 is connected to the photographing device 20 and the display panel 30 respectively. The compensation data determination method of the display panel can be executed by the adjustment computer 10 of the brightness adjustment system. Figure 2 This is a flowchart of a method for determining compensation data for a display panel according to an embodiment of the present invention, see reference. Figure 2 The method for determining the compensation data for this display panel includes:

[0054] S110. If there are abnormal brightness areas in the debugging screen under the original brightness data, the original brightness data is corrected by using debugging gain parameters that are different from the public version gain parameters to obtain corrected brightness data.

[0055] The debugging screen can be a pre-set screen, and the number of debugging screens is at least one; in some embodiments, the number of debugging screens is at least two. When there are at least two debugging screens, the compensation data determination method of this embodiment is executed for each debugging screen to obtain corresponding compensation data. For example, if the debugging screen includes at least one display screen at a preset grayscale, then for each display screen at a preset grayscale, the compensation data determination method of this embodiment is used to obtain compensation data for multiple pixels at the preset grayscale. The debugging screen can be a monochrome display screen, such as a red screen, a green screen, or a blue screen. In this case, the compensation data for the corresponding color pixel can be determined based on the original brightness data of the monochrome display screen of each luminous color using the compensation data determination method of this embodiment. The debugging screen can also be a white screen. In this case, the original brightness data corresponding to the monochrome pixels can be decomposed based on the original brightness data of the white screen, and then the compensation data for monochrome pixels at different positions can be determined based on the original brightness data corresponding to the monochrome pixels using the compensation data determination method of this embodiment.

[0056] The raw brightness data in the debugging screen is the brightness data of the display panel under the raw driving data. This raw driving data is uncompensated driving data, which can be pre-stored in the display panel's driver chip.

[0057] An abnormal brightness region includes excessively bright or dark areas in the test screen. This region includes abnormal pixels, and the difference between the brightness of the abnormal pixel and the set normal brightness falls within a preset abnormal brightness range. The preset abnormal brightness range may correspond to the display grayscale of the test screen; optionally, different display grayscales correspond to different preset abnormal brightness ranges. In some embodiments, the preset abnormal brightness range includes values ​​greater than a first preset threshold or the inverse of a first preset threshold. In this case, the larger the display grayscale, the larger the first preset threshold. In some embodiments, the set normal brightness may be the target brightness corresponding to the grayscale of the test screen; in other embodiments, the set normal brightness may be obtained based on the brightness data corresponding to the test screen. Optionally, the set normal brightness may be the brightness of the center pixel of the display panel, or the average brightness of multiple pixels. For example, when determining whether an abnormal brightness region exists based on original brightness data, the set normal brightness may be obtained based on the original brightness data.

[0058] It should be noted that the aforementioned abnormal pixels can be used to identify whether a display panel is normal or abnormal. If abnormal pixels exist in the display panel, i.e., there are excessively bright or excessively dark areas, then the display panel is abnormal; if no abnormal pixels exist in the display panel, i.e., there are no excessively bright or excessively dark areas, then the display panel is normal. The brightness abnormal area can include all abnormal pixels; it can also include normal pixels, in which case the number of normal pixels in the brightness abnormal area is less than the number of abnormal pixels. For example, to facilitate marking brightness abnormal areas during computer debugging, a regular rectangular area or other shaped area containing abnormal pixels can be taken as the brightness abnormal area.

[0059] A normal display panel may have areas that are too bright or too dark under the test screen. Specifically, at the same grayscale, the brightness of abnormal pixels in the overly bright areas of an abnormal display panel is higher than the brightness of each pixel in the overly bright areas of a normal display panel; conversely, at the same grayscale, the brightness of abnormal pixels in the overly dark areas of an abnormal display panel is lower than the brightness of each pixel in the overly dark areas of a normal display panel. Optionally, in overly bright areas, the difference between the brightness of the overly bright pixels and the set normal brightness is greater than a second preset threshold and less than a first preset threshold; in overly dark areas, the negative of the difference between the brightness of the overly dark pixels and the set normal brightness is greater than a second preset threshold and less than a first preset threshold. The reference gain parameters are obtained based on brightness adjustments performed on at least one normal display panel. The statement that a normal display panel has no abnormal brightness areas under the test screen means that the normal display panel has no abnormal brightness areas under the original brightness data of the test screen.

[0060] In some embodiments, whether there are abnormal brightness areas in the debug screen under the original brightness data can be determined based on the original brightness data of the debug screen. In other embodiments, it can also be determined based on human visual observation; this embodiment of the present invention does not specifically limit this. In the case of abnormal brightness areas, the original brightness data is corrected using debug gain parameters that are different from the reference gain parameters for the abnormal brightness areas. The debug gain parameters are configured to increase or decrease the original brightness data corresponding to the abnormal brightness areas. For example, for pixels in overly bright areas, the corrected brightness data Y1 = Y0(1 + gain); for pixels in overly dark areas, the corrected brightness data Y1 = Y0(1 - gain), where Y0 represents the original brightness data and gain represents the debug gain parameter. By using debug gain parameters that are different from the reference gain parameters to correct the original brightness data in the abnormal brightness areas, the problem of inaccurate compensation data and poor compensation effect caused by the inability of the reference gain parameters to match the abnormal brightness areas of the abnormal display panel is avoided.

[0061] S120. Determine the compensation data corresponding to multiple pixels based on the corrected brightness data, so that after the pixels are compensated by the corresponding compensation data, the brightness uniformity of the display panel under the test screen meets the target uniformity requirements.

[0062] Specifically, when the display panel in the debugging screen only includes areas of abnormal brightness, compensation data for multiple pixels in the display panel can be obtained based on the corrected brightness data of the abnormal brightness areas. When the display panel in the debugging screen includes both areas of abnormal brightness and areas of normal brightness, compensation data for multiple pixels in the display panel can be determined based on the corrected brightness data of both the abnormal and normal brightness areas. In the normal brightness area, the difference between the brightness of each pixel and the set normal brightness is outside the preset abnormal brightness range. The normal brightness area can use different debugging gain parameters to correct the original brightness data compared to the abnormal brightness area. For example, after obtaining the corrected brightness data for the entire display panel in the debugging screen, for each pixel, the compensation data corresponding to that pixel can be determined based on the difference between the corrected brightness data of that pixel and the corrected brightness data of the center point or the average corrected brightness data (denoted as the first difference). The average corrected brightness data is equal to the mean of the corrected brightness data of each pixel. Optionally, the compensation data can be determined based on a preset correspondence between the first difference and the compensation data. This preset correspondence can be a formula, mapping table, etc., and can be obtained in advance through extensive experimental testing.

[0063] The compensation data determination method for the display panel in this embodiment addresses the issue of abnormal brightness areas in the test image under the original brightness data. It corrects the original brightness data for these abnormal areas using a different debugging gain parameter than the reference gain parameter, obtaining corrected brightness data. Based on this corrected brightness data, compensation data is determined for multiple pixels. This ensures that after compensation, the brightness uniformity of the display panel in the test image meets the target uniformity requirements. By using a different debugging gain parameter than the reference gain parameter to correct the original brightness data for abnormal areas, the method avoids the problem of inaccurate compensation data and poor compensation effects caused by the reference gain parameter not matching the abnormal brightness areas of the display panel. This ensures that the determined compensation data matches the required brightness compensation level for the abnormal brightness areas of the display panel, thereby improving display uniformity, enhancing the display effect, and improving the user experience.

[0064] Optionally, the preset abnormal brightness range includes values ​​greater than a first preset threshold or less than the opposite of the first preset threshold. In some embodiments, S120 includes: determining, based on the original brightness data, that if there are overly bright areas and / or overly dark areas in the debugging screen, correcting the original brightness data for the overly bright areas using a first debugging gain parameter, and correcting the original brightness data for the overly dark areas using a second debugging gain parameter, to obtain corrected brightness data. The first debugging gain parameter and the second debugging gain parameter are different.

[0065] In the overly bright region, the difference between the brightness of the abnormal pixel and the set normal brightness is greater than the first preset threshold; in the overly dark region, the negative of the difference between the brightness of the abnormal pixel and the set normal brightness is greater than the first preset threshold.

[0066] Specifically, in related technologies, using the same standard gain parameter to correct brightness data for both overly bright and overly dark areas in the display panel results in poor image uniformity under the obtained compensation data. In this embodiment, a first adjustable gain parameter is used to correct the original brightness data for overly bright areas, and a second adjustable gain parameter is used to correct the original brightness data for overly dark areas. Different adjustable gain parameters can be used to correct the original brightness data for overly bright and overly dark areas, allowing for different degrees of correction. This enables the compensation data obtained based on the corrected brightness data to provide a more suitable compensation for overly bright and overly dark areas, resulting in better uniformity of the display panel and improved display performance.

[0067] In some embodiments, the first debug gain parameter is smaller than the reference gain parameter, and the second debug gain parameter is larger than the reference gain parameter. In this case, the degree of correction of the original brightness data of overly bright areas using the first debug gain parameter is less than the degree of correction using the reference gain parameter. Compared to correction using the reference gain parameter, the brightness data of the overly bright areas is lower, and correspondingly, the compensation data obtained for the overly bright areas will be smaller, avoiding the situation where overly bright areas are compensated to the point of being too low in brightness. Similarly, the degree of correction of the original brightness data of overly dark areas using the second debug gain parameter is greater than the degree of correction using the reference gain parameter. Compared to correction using the reference gain parameter, the brightness data of the overly dark areas is lower, and correspondingly, the compensation data obtained for the overly bright areas will be larger, avoiding the situation where underly bright areas are compensated to the point of being still too low in brightness.

[0068] In other embodiments, the first debug gain parameter is greater than the reference gain parameter, and the second debug gain parameter is less than the reference gain parameter. In this case, the degree of correction of the original brightness data of overly bright areas using the first debug gain parameter is greater than the degree of correction using the reference gain parameter. Compared to correction using the reference gain parameter, this results in higher brightness data for overly bright areas. Consequently, the compensation data received by overly bright areas will be larger than that received using the reference gain parameter, avoiding the situation where insufficient compensation for overly bright areas leads to excessively high brightness after compensation. Similarly, the degree of correction of the original brightness data of overly dark areas using the second debug gain parameter is less than the degree of correction using the reference gain parameter. Compared to correction using the reference gain parameter, this results in higher brightness data for overly dark areas. Consequently, the compensation data received by overly bright areas will be smaller than that received using the reference gain parameter, avoiding the situation where excessive compensation for overly bright areas leads to excessively high brightness after compensation for overly dark areas.

[0069] In other embodiments, both the first and second debug gain parameters are greater than or both are less than the reference gain parameter. In this case, the degree of correction of the original brightness data of overly bright areas using the first debug gain parameter is less than the degree of correction using the reference gain parameter. Compared to correction using the reference gain parameter, the brightness data of the overly bright areas is lower, and correspondingly, the compensation data obtained by the overly bright areas will be smaller, avoiding the situation where the overly bright areas are compensated to be too low in brightness due to excessive compensation. Similarly, the degree of correction of the original brightness data of overly dark areas using the second debug gain parameter is less than the degree of correction using the reference gain parameter. Compared to correction using the reference gain parameter, the brightness data of the overly dark areas is higher, and correspondingly, the compensation data obtained by the overly bright areas will be smaller, avoiding the situation where the overly bright areas are compensated to be too high in brightness due to excessive compensation.

[0070] Alternatively, for overly bright areas, the correction degree of the original brightness data using the first adjustable gain parameter is greater than that using the reference gain parameter. Compared to correction using the reference gain parameter, this results in higher brightness data for overly bright areas. Consequently, the compensation data received by overly bright areas will be larger compared to correction using the reference gain parameter, avoiding the situation where the brightness of overly bright areas remains too high after compensation due to insufficient compensation. Similarly, for overly dark areas, the correction degree of the original brightness data using the second adjustable gain parameter is greater than that using the reference gain parameter. Compared to correction using the reference gain parameter, this results in lower brightness data for overly dark areas. Consequently, the compensation data received by overly bright areas will be larger compared to correction using the reference gain parameter, avoiding the situation where the brightness of overly dark areas remains too low after compensation due to insufficient compensation for overly bright areas.

[0071] Optionally, the first adjustment gain parameter includes at least two, and / or the second adjustment gain parameter includes at least two; thus, if the adjusted image does not meet the target uniformity requirement under the compensation data obtained with one first adjustment gain parameter, different first adjustment gain parameters can be used to correct the original brightness data of the overly bright areas; if the adjusted image does not meet the target uniformity requirement under the compensation data obtained with one first adjustment gain parameter, different second adjustment gain parameters can be used to correct the original brightness data of the overly dark areas, so that the adjusted image meets the target uniformity requirement under the compensation data, thereby ensuring the brightness uniformity under the compensation data.

[0072] The first and second debugging gain parameters can be obtained in advance. Optionally, before S110, the method further includes: selecting multiple first defective display panels, each of which has an overly bright area in the debugging screen; performing brightness adjustment on the overly bright area of ​​each first defective display panel using different debugging gain parameters, and determining the debugging gain parameter when there are no abnormal pixels in the overly bright area as the first debugging gain parameter;

[0073] Multiple second defective display panels are selected, and the second defective display panels have excessively dark areas in the debugging screen. Different debugging gain parameters are used to adjust the brightness of the excessively dark areas in each second defective display panel. The debugging gain parameter when there are no abnormal pixels in the excessively dark areas is determined as the second debugging gain parameter.

[0074] The process of adjusting the brightness of overly bright areas in the first defective display panel using different adjustment gain parameters involves capturing the adjustment image of the first defective display panel with a camera, then applying different adjustment gain parameters to correct the original brightness data for each overly bright area, resulting in multiple sets of corrected brightness data. Based on each set of corrected data, corresponding compensation data is obtained, and the adjustment gain parameter under the compensation data that satisfies the target uniformity requirement is determined as the first adjustment gain parameter. There is at least one first adjustment gain parameter for the same first defective display panel, and the first adjustment gain parameters for different first defective display panels can be the same or different, thus determining at least one first adjustment gain parameter. The process for determining the second adjustment gain parameter is similar to that of the first adjustment gain parameter and will not be elaborated here.

[0075] By pre-determining the first and second debugging gain parameters and then storing them in the debugging computer, the corresponding debugging gain parameters can be directly called for debugging when there are overly bright or overly dark areas on the display panel, which helps to improve the efficiency of the compensation data determination method.

[0076] Figure 3 This is a flowchart of another method for determining compensation data for a display panel provided in an embodiment of the present invention, see reference. Figure 3 The method for determining the compensation data for this display panel includes:

[0077] S210. Obtain the original brightness data of the display panel in the debugging screen.

[0078] The raw brightness data includes the brightness of multiple pixels on the display panel under the raw driving data. The raw driving data can be obtained by taking pictures of the display panel's calibration screen with a camera, and the calibration computer can acquire the raw brightness data from the camera.

[0079] S220. Determine whether there are areas of abnormal brightness in the debugging screen based on the original brightness data.

[0080] Specifically, the brightness of each pixel in the original brightness data can be compared with the set normal brightness to determine if there is a brightness abnormality area in the test screen if the difference between the brightness of at least one pixel in the original brightness data and the set normal brightness is within the preset abnormal brightness range; if the difference between the brightness of each pixel and the set normal brightness is outside the preset abnormal brightness range, it can be determined that there is no brightness abnormality area in the test screen.

[0081] If yes, then execute S230; otherwise, execute S240.

[0082] S230. Correct the original brightness data by using an adjustment gain parameter that is different from the public version gain parameter for areas with abnormal brightness, so as to obtain corrected brightness data.

[0083] S240. Correct the original brightness data of the display panel using the reference gain parameters to obtain corrected brightness data.

[0084] Specifically, if the test screen does not have any abnormal brightness areas based on the original brightness data, it means that the display panel does not have any overly bright or overly dark areas in the test screen. In this case, the display panel is a normal display panel and can be used with the reference gain parameters. The brightness data of the entire display panel can be corrected using the reference gain parameters. This improves the efficiency of correcting the original brightness data of the display panel, thereby improving the efficiency of determining the compensation data of the display panel.

[0085] S250. Determine the corresponding compensation data for each pixel based on the corrected brightness data, so that after the pixels are compensated by the corresponding compensation data, the brightness uniformity of the display panel under the test screen meets the target uniformity requirements.

[0086] Figure 4 This is a flowchart of another method for determining compensation data for a display panel provided in an embodiment of the present invention, see reference. Figure 4 The method for determining the compensation data for this display panel includes:

[0087] S310. Obtain the original brightness data of the display panel in the debugging screen.

[0088] S320. Determine whether there are areas of abnormal brightness in the debugging screen based on the original brightness data.

[0089] If yes, then execute S330; otherwise, execute S340.

[0090] S330. Correct the original brightness data by using a different adjustment gain parameter than the public version for areas with abnormal brightness, so as to obtain corrected brightness data.

[0091] S340. Correct the original brightness data of the display panel using the reference gain parameters to obtain corrected brightness data.

[0092] S350: Determine the compensation data corresponding to multiple pixels based on the corrected brightness data, and send the compensation data to the driver chip of the display panel so that the driver chip drives the display panel to display according to the compensation data and the original driver data, thereby obtaining intermediate brightness data.

[0093] Optionally, the compensation data is used to compensate the original driving data. For example, if the original driving data is data voltage, then the compensation data is the compensation value of the data voltage. After determining the compensation data corresponding to multiple pixels based on the corrected brightness data, the driver chip can determine the compensated driving data based on the original driving data and the compensation data corresponding to the pixels. This allows the driver chip to drive the display panel according to the compensated driving data, causing the display panel to display the debugging screen again. The debugging screen displayed again is the debugging screen under the compensated driving data. The brightness data of the debugging screen can be acquired again by the camera as intermediate brightness data.

[0094] S360: Determine whether there are areas of abnormal brightness in the debugging screen based on the intermediate brightness data.

[0095] If an abnormal brightness area is determined based on the intermediate brightness data, return to S330 until the compensation data corresponding to the corrected brightness data shows that there is no abnormal brightness area.

[0096] Specifically, the debugging computer can further determine whether there are abnormal brightness areas based on intermediate brightness data. When determining the presence of abnormal brightness areas based on intermediate brightness data, the difference between the brightness of each pixel in the intermediate brightness data and the set normal brightness can be used for judgment. If the difference between the brightness of at least one pixel in the intermediate brightness data and the set normal brightness is within a preset abnormal brightness range, it is determined that there is an abnormal brightness area in the debugging screen. If the difference between the brightness of each pixel and the set normal brightness is outside the preset abnormal brightness range, it is determined that there is no abnormal brightness area in the debugging screen. In some embodiments, the set normal brightness can be the target brightness corresponding to the grayscale of the debugging screen; in other embodiments, the set normal brightness can be obtained based on the brightness data corresponding to the debugging screen. For example, when determining whether there are abnormal brightness areas based on intermediate brightness data, the set normal brightness can be obtained based on the intermediate brightness data.

[0097] The different debug gain parameters used in each call result in different corrected brightness data for each correction of the original brightness data in the abnormal brightness area. This leads to different compensation data based on the different corrected brightness data, until there are no abnormal brightness areas under the compensation data corresponding to the corrected brightness data.

[0098] S370. When there are no abnormal brightness areas, determine the final compensation data by correcting the compensation data corresponding to the brightness data.

[0099] Specifically, under the compensation data corresponding to the corrected brightness data, if there are no abnormal brightness areas on the display panel in the debugging screen, the compensation data at this time is determined as the final compensation data. After the compensation data is applied, there are no abnormal brightness areas on the display panel, thereby improving the display uniformity and display effect.

[0100] Optionally, following S370, the method also includes storing compensation data in the display panel. The compensation data stored here is the aforementioned final compensation data, which allows the display panel to ensure display uniformity by calling the corresponding final compensation data during the actual driving process.

[0101] Figure 5 This is a flowchart of another method for determining compensation data for a display panel provided in an embodiment of the present invention, see reference. Figure 5 The method for determining the compensation data for this display panel includes:

[0102] S410. If there are abnormal brightness areas in the debug screen under the original brightness data, the original brightness data is corrected by using debug gain parameters that are different from the public version gain parameters for the abnormal brightness areas, so as to obtain corrected brightness data.

[0103] S420. Based on the original brightness data, if there are areas with normal brightness in the debugging screen, use the reference gain parameters to correct the original brightness data for the areas with normal brightness to obtain corrected brightness data.

[0104] In the normal brightness area, the difference between the brightness of each pixel and the set normal brightness is outside the preset abnormal brightness range; under the compensation data corresponding to the public gain parameters, the brightness uniformity of the normal display panel in the test screen meets the target uniformity requirements.

[0105] Specifically, when both normal and abnormal brightness areas exist simultaneously in the debugging screen, the original brightness data for the normal brightness area is corrected using the reference gain parameters, while the original brightness data for the abnormal brightness area is corrected using debugging gain parameters different from the reference gain parameters. This avoids inaccurate compensation data caused by the reference gain parameters not being suitable for abnormal brightness areas, and also avoids inaccurate compensation data caused by the debugging gain parameters for abnormal brightness areas not being suitable for normal brightness areas. Furthermore, since neither the normal brightness area nor the normal display panel has abnormal pixels in the debugging screen, there is no need to additionally determine the gain parameters for the normal brightness area; the reference gain parameters can be used directly. This ensures the accuracy of the obtained compensation data while improving the efficiency of compensation data determination.

[0106] S430. Based on the corrected brightness data of the normal brightness area and the corrected brightness data of the abnormal brightness area, determine the compensation data corresponding to multiple pixels in the abnormal brightness area and the normal brightness area.

[0107] Specifically, compensation data for multiple pixels in the display panel is determined based on the corrected brightness data corresponding to the abnormal brightness area and the normal brightness area of ​​the display panel. This includes, but is not limited to: for each pixel, the compensation data corresponding to the pixel can be determined based on the difference between the corrected brightness data corresponding to the pixel and the corrected brightness data of the center point or the average corrected brightness data (referred to as the first difference).

[0108] Based on the above embodiments, optionally, the preset abnormal brightness range includes values ​​greater than a first preset threshold or less than the opposite of the first preset threshold; the target uniformity requirement is that, under the test screen, the brightness difference between the maximum brightness pixel and the minimum brightness pixel is less than a second preset threshold, and the second preset threshold is less than the first preset threshold. Thus, when the display panel meets the target uniformity requirement under the test screen, the brightness of abnormal pixels in overly dark and overly bright areas is compensated to no longer be too dark or too bright, thereby improving the display uniformity of the display panel and enhancing the display effect.

[0109] This invention also provides a display panel that uses compensation data determined by the compensation data determination method of any embodiment of this invention for brightness compensation. It possesses the beneficial effects of the compensation data determination method for the display panel of any embodiment of this invention, which will not be elaborated further here. This display panel can be a display panel in a mobile phone, or any electronic product with display functionality, including but not limited to the following categories: display panels in products such as televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, automotive displays, medical devices, industrial control equipment, and touch interactive terminals.

[0110] This invention also provides a brightness adjustment system for a display panel, such as...Figure 1 As shown, the brightness adjustment system of the display panel 30 includes an adjustment computer 10 and a photographing device 20. The adjustment computer 10 is connected to both the photographing device 20 and the display panel 30. The adjustment computer 10 is used to determine, based on the original brightness data of the adjustment screen, that in the case of an abnormal brightness area in the adjustment screen, to correct the original brightness data of the abnormal brightness area using an adjustment gain parameter different from the reference gain parameter, so as to obtain corrected brightness data. Based on the corrected brightness data, compensation data corresponding to multiple pixels is determined so that after the pixels are compensated by the corresponding compensation data, the brightness uniformity of the display panel 30 in the adjustment screen meets the target uniformity requirements. The abnormal brightness area includes abnormal pixels, and the difference between the brightness of the abnormal pixels and the set normal brightness is within a preset abnormal brightness range. The adjustment gain parameter is configured to increase or decrease the original brightness data corresponding to the abnormal brightness area. The reference gain parameter is obtained based on brightness adjustment of at least one normal display panel, and the normal display panel does not have an abnormal brightness area in the adjustment screen. The photographing device 20 is used to photograph the adjustment screen to obtain the original brightness data.

[0111] During the brightness adjustment process of the display panel 30, the imaging device can also be used to capture the intermediate brightness data of the adjustment screen after compensation data. After determining the compensation data, the debugging computer 10 can store the compensation data in the display panel 30, thereby providing the basis for the subsequent actual driving process of the display panel 30.

[0112] The brightness adjustment system for the display panel in this embodiment of the invention allows the adjustment computer to execute the compensation data determination method of any of the above embodiments of the invention, and it possesses the beneficial effects of the compensation data determination method of any of the above embodiments of the invention, which will not be elaborated further here.

[0113] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0114] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for determining compensation data of a display panel, characterized in that, The method comprises the following steps: In the case that the debugging picture has a luminance abnormal area under the original luminance data, the original luminance data is corrected by using a debugging gain parameter different from a public gain parameter in the luminance abnormal area to obtain corrected luminance data; Compensation data corresponding to a plurality of pixels is determined according to the corrected luminance data, so that the luminance uniformity of the display panel under the debugging picture meets a target uniformity requirement after the pixels are compensated by the corresponding compensation data; The luminance abnormal area comprises an abnormal pixel point, and the difference between the luminance of the abnormal pixel point and a set normal luminance is within a preset abnormal luminance range; the debugging gain parameter is configured to increase or decrease the original luminance data corresponding to the luminance abnormal area; The public gain parameter is obtained based on luminance debugging of at least one normal display panel, and the normal display panel does not have the luminance abnormal area under the debugging picture.

2. The method of claim 1, wherein the compensation data is determined based on a relationship between the display panel and a reference display panel. Before the step of correcting the original luminance data by using a debugging gain parameter different from a public gain parameter in the luminance abnormal area to obtain corrected luminance data in the case that the debugging picture has a luminance abnormal area under the original luminance data, the method further comprises the following steps: Original luminance data of the display panel under the debugging picture is obtained, and the original luminance data comprises the luminance of a plurality of pixels of the display panel under original driving data; The step of correcting the original luminance data by using a debugging gain parameter different from a public gain parameter in the luminance abnormal area to obtain corrected luminance data in the case that the debugging picture has a luminance abnormal area under the original luminance data comprises the following steps: It is judged whether there is a luminance abnormal area under the debugging picture according to the original luminance data; If yes, the original luminance data is corrected by using a debugging gain parameter different from a public gain parameter in the luminance abnormal area to obtain corrected luminance data; Preferably, after the step of determining compensation data corresponding to a plurality of pixels according to the corrected luminance data, so that the luminance uniformity of the display panel under the debugging picture meets a target uniformity requirement after the pixels are compensated by the corresponding compensation data, the method further comprises the following step: the compensation data is stored to the display panel.

3. The method of claim 2, wherein the compensation data is determined based on the difference between the first and second display panel characteristics. The step of determining compensation data corresponding to a plurality of pixels according to the corrected luminance data comprises the following steps: Compensation data corresponding to a plurality of pixels is determined according to the corrected luminance data, and the compensation data is sent to a driving chip of the display panel, so that the driving chip drives the display panel to display according to the compensation data and the original driving data to obtain intermediate luminance data; If there is a luminance abnormal area according to the intermediate luminance data, the step of correcting the original luminance data by using a debugging gain parameter different from a public gain parameter in the luminance abnormal area to obtain corrected luminance data is returned until there is no luminance abnormal area under the compensation data corresponding to the corrected luminance data; wherein the debugging gain parameter is different each time; The compensation data corresponding to the corrected luminance data when there is no luminance abnormal area is used to determine final compensation data.

4. The method of claim 1, wherein the compensation data is determined based on a plurality of display panels. The preset abnormal brightness range includes a value greater than a first preset threshold or a value less than an opposite of the first preset threshold; in a case where the debugging picture has a brightness abnormal area under the original brightness data, the original brightness data is corrected by using a debugging gain parameter different from a public gain parameter to obtain corrected brightness data, including: In a case where the debugging picture has an over-bright area and / or an over-dark area under the original brightness data, the original brightness data is corrected by using a first debugging gain parameter for the over-bright area and a second debugging gain parameter for the over-dark area to obtain corrected brightness data, according to the original brightness data; In the over-bright area, a difference between the brightness of the abnormal pixel point and the set normal brightness is greater than the first preset threshold; in the over-dark area, an opposite of the difference between the brightness of the abnormal pixel point and the set normal brightness is greater than the first preset threshold; the first debugging gain parameter and the second debugging gain parameter are different; Preferably, the first debugging gain parameter includes at least two, and / or the second debugging gain parameter includes at least two; Preferably, the first debugging gain parameter is less than the public gain parameter, and the second debugging gain parameter is greater than the public gain parameter; or the first debugging gain parameter is greater than the public gain parameter, and the second debugging gain parameter is less than the public gain parameter; or the first debugging gain parameter and the second debugging gain parameter are both greater than the public gain parameter or both less than the public gain parameter.

5. The method of claim 4, wherein the compensation data is determined based on the difference between the first and second display panel characteristics. Before correcting the original brightness data by using a debugging gain parameter different from a public gain parameter for the brightness abnormal area to obtain corrected brightness data in a case where the debugging picture has a brightness abnormal area under the original brightness data, further including: Selecting a plurality of first poor display panels, the first poor display panels having the over-bright area under the debugging picture; Correcting the brightness of the over-bright area of each of the first poor display panels by using different debugging gain parameters, and determining the debugging gain parameter when the over-bright area does not have the abnormal pixel point as the first debugging gain parameter; Selecting a plurality of second poor display panels, the second poor display panels having the over-dark area under the debugging picture; Correcting the brightness of the over-dark area of each of the second poor display panels by using different debugging gain parameters, and determining the debugging gain parameter when the over-dark area does not have the abnormal pixel point as the second debugging gain parameter.

6. The method of claim 1 to 5, wherein Further including: In a case where the debugging picture has a normal brightness area under original brightness data, the original brightness data is corrected by using the public gain parameter to obtain corrected brightness data, wherein, in the normal brightness area, the brightness of each pixel is outside the preset abnormal brightness range from the set normal brightness; and the normal display panel has a brightness uniformity under the debugging picture that meets a target uniformity requirement under compensation data corresponding to the public gain parameter. Preferably, the method for determining compensation data corresponding to a plurality of pixels according to the corrected brightness data comprises: determining compensation data corresponding to a plurality of pixels in the abnormal brightness area and the normal brightness area according to the corrected brightness data of the normal brightness area and the corrected brightness data of the abnormal brightness area.

7. The method of claim 1 to 5, wherein Further comprising: determining, according to the original brightness data, that in a case where the debugging picture has no abnormal brightness area, the original brightness data is corrected by using the public gain parameter to obtain corrected brightness data.

8. The method of claim 1 to 5, wherein, The set normal brightness is obtained based on brightness data corresponding to the debugging picture. And / or, the preset abnormal brightness range includes a value greater than a first preset threshold or a value less than the opposite of the first preset threshold; and the target uniformity requirement is that the brightness difference between a maximum brightness pixel and a minimum brightness pixel under the debugging picture is less than a second preset threshold, and the second preset threshold is less than the first preset threshold. Preferably, the set normal brightness is the brightness of a center pixel of the display panel or the average brightness of a plurality of pixels.

9. A display panel, characterized by, The compensation data is determined by using the compensation data determination method in any one of claims 1-8.

10. A brightness tuning system of a display panel, characterized by, The debugging computer and the photographing device are connected to each other and to the display panel. The debugging computer is configured to determine, according to original brightness data of a debugging picture, that in a case where the debugging picture has an abnormal brightness area, the original brightness data is corrected by using a debugging gain parameter different from the public gain parameter to obtain corrected brightness data. The compensation data corresponding to a plurality of pixels is determined according to the corrected brightness data, so that the display panel has a brightness uniformity under the debugging picture that meets a target uniformity requirement after the pixels are compensated by the corresponding compensation data. The abnormal brightness area includes an abnormal pixel, and the brightness of the abnormal pixel is within a preset abnormal brightness range from the set normal brightness; the debugging gain parameter is configured to increase or decrease the original brightness data corresponding to the abnormal brightness area; and the public gain parameter is obtained based on brightness debugging of at least one normal display panel, and the normal display panel has no abnormal brightness area under the debugging picture. The photographing device is configured to capture the debugging picture to obtain the original brightness data.

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