Defect compensation method of display panel, electronic equipment and storage medium

Abstract

The embodiment of the invention discloses a defect compensation method of a display panel, electronic equipment and a storage medium. According to the method, through brightness data of the display panel under at least one luminous intensity, a first relation function that the defect compensation amount of a pixel unit changes along with a compensation coefficient of the display panel and a mapping relation between the luminous intensity of the display panel and the compensation coefficient are obtained in advance; and determining compensation data required by the display panel according to the mapping relation and at least two constants in the first relation function, and finally writing the acquired compensation data into the display panel so as to perform defect compensation on the display panel under at least one luminous intensity. The effect of compensating the display panel twice is achieved on the basis that the second defect compensation on the display panel is not added.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and in particular, to a method for compensating defects of a display panel, an electronic device, and a storage medium. Background Art

[0002] With the continuous innovation and improvement of display technologies, the design schemes of display panels have become more diversified. However, due to process defects, fluctuations, and other factors during manufacturing and production, the brightness uniformity of display panels is poor, which in turn causes the problem of chromaticity non-uniformity (Mura) of display panels. The existence of Mura will affect the overall display effect and subjective taste of the display panel. Therefore, during the production process of the display panel, it is necessary to perform DeMura on the display panel, that is, to compensate for Mura differences by means of optical photography, so that the display panel has better brightness uniformity. Summary of the Invention

[0003] The present application provides a method for compensating defects of a display panel, an electronic device, and a storage medium, which can achieve the effect of compensating the display panel twice without increasing the second defect compensation for the display panel, and improves the defect compensation efficiency of the display panel.

[0004] In a first aspect, the present application provides a method for compensating defects of a display panel. The display panel includes a plurality of pixel units. The method includes:

[0005] Based on the brightness data of the display panel at at least one emission intensity, obtain the mapping relationship between the emission intensity of the display panel and the compensation coefficient, and the first relationship function of the defect compensation amount of the pixel unit changing with the compensation coefficient; the first relationship function includes at least two constants;

[0006] Based on the mapping relationship, determine the compensation coefficient required for the display panel at at least one emission intensity;

[0007] According to the compensation coefficient required for the display panel and at least two constants in the first relationship function corresponding to a plurality of pixel units, determine the compensation data required for the display panel at at least one emission intensity;

[0008] Write the compensation data into the display panel to compensate for the defects of the display panel at at least one emission intensity.

[0009] In a second aspect, the present application further provides a device for compensating defects of a display panel. The display panel includes a plurality of pixel units. The device includes:

[0010] An acquisition unit, configured to obtain a mapping relationship between the light-emitting intensity of the display panel and the compensation coefficient, and a first relationship function of the defect compensation amount of the pixel unit changing with the compensation coefficient, based on the luminance data of the display panel at at least one light-emitting intensity; the first relationship function includes at least two constants;

[0011] A first determination unit, configured to determine the compensation coefficients required for the display panel at at least one light-emitting intensity based on the mapping relationship;

[0012] A second determination unit, configured to determine the compensation data required for the display panel at at least one light-emitting intensity according to the compensation coefficients required for the display panel and at least two constants in the first relationship functions corresponding to multiple pixel units;

[0013] A writing unit, configured to write the compensation data into the display panel to perform defect compensation on the display panel at at least one light-emitting intensity.

[0014] In a third aspect, an embodiment of the present application further provides an electronic device, including a memory storing multiple instructions; a processor loads instructions from the memory to execute the defect compensation method for the display panel provided in the first aspect.

[0015] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, the computer-readable storage medium stores multiple instructions, and the instructions are suitable for being loaded by a processor to execute the defect compensation method for the display panel provided in the first aspect.

[0016] In a fifth aspect, an embodiment of the present application further provides a computer program product, including a computer program or instructions, and the computer program or instructions are executed by a processor to perform the defect compensation method for the display panel provided in the first aspect.

[0017] The defect compensation method for the display panel provided by the present application can, based on the luminance data of the display panel at at least one light-emitting intensity, pre-obtain a first relationship function of the defect compensation amount of the pixel unit changing with the compensation coefficient of the display panel, and a mapping relationship between the light-emitting intensity of the display panel and the compensation coefficient. The first relationship function includes at least two constants. Then, according to the mapping relationship, determine the compensation coefficients required for the display panel at at least one light-emitting intensity, and according to the compensation coefficients required for the display panel and at least two constants in the first relationship functions corresponding to multiple pixel units, determine the compensation data required for the display panel. Finally, write the obtained compensation data into the display panel to perform defect compensation on the display panel at at least one light-emitting intensity, thereby achieving the effect of compensating the display panel twice without increasing the second defect compensation for the display panel, improving the defect compensation efficiency of the display panel, and especially for the display panel with severe yin-yang screen, effectively improving its yield. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0019] Figure 1 It is the first flowchart diagram of the defect compensation method for the display panel provided by the present application;

[0020] Figure 2 It is the second flowchart diagram of the defect compensation method for the display panel provided by the present application;

[0021] Figure 3 It is the third flowchart diagram of the defect compensation method for the display panel provided by the present application;

[0022] Figure 4 It is the schematic block diagram of the defect compensation device for the display panel provided by the present application;

[0023] Figure 5 It is the schematic block diagram of the electronic device provided by the present application. Detailed implementation manners

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, rather than all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0025] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0026] It should also be understood that the terms used in this specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this specification of the present application and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0027] It should be further understood that the term " / and / or" used in this specification of the present application and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0028] In addition, in the present application, unless otherwise clearly specified or limited in the embodiments, the terms "installation", "connection", "linkage" and "fixation" and the like appearing in the embodiments shall be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral one. Understandably, it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the communication inside two components, or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific implementation situations.

[0029] In the present application, the display panel can be a display panel of the AMOLED (Active-matrix organic Light-Emitting Diode) type, or the OLED (Organic Light-Emitting Diode) type, or the LCD (Liquid Crystal Display) type, etc., and can be produced into the display screen of a smart phone, the screen of a smart wearable device, the display screen of a tablet or a notebook computer, etc.

[0030] In the related art, when performing Demura processing on a display panel, the compensation algorithm of the DDIC (display driver integrated circuit) can be directly adopted, such as Gray_out = Gray_in + Gain * Offset, where Gray_out is the output gray level value, Gray_in is the input gray level value, Gain is the compensation coefficient, and Offset is the compensation brightness.

[0031] Specifically, the photographing data can be converted into compensation data, and the compensation data can be stored in the Flash of the DDIC chip of the display panel to implement Demura processing on the display panel. Among them, the compensation data includes the first compensation data offset1 and the second compensation data offse2. The first compensation data offset1 is used for high gray level compensation, and the second compensation data offse2 is used for low gray level compensation.

[0032] Since the Flash storage space of the DDIC chip is limited, and to reduce the burden on the DDIC chip and improve the display effect, the compensation data can also be pre-positioned to the GPU to perform Demura processing on the display panel. Specifically, at the display stage, the GPU superimposes the original image data and the compensation data to generate the final display data, and then more complex compensation logic can be implemented to further optimize the display effect.

[0033] However, whether the compensation data is stored in the Flash or written into the GPU, only one Demura process is performed on the display panel. However, due to the differences in the panel, the gray levels of the pixels in different areas of the display panel do not change linearly. If only one Demura process is performed, there will still be uneven display in some areas of the display panel at different brightness levels.

[0034] In some embodiments, the compensation data can be pre-stored in the Flash of the DDIC chip, one Demura process is performed, and the compensation data is stored in the GPU for Demura processing during display interpretation, so as to perform two Demura processes on the display panel, thereby further optimizing the display effect. Among them, the logic of the two Demura processes can be the same or different.

[0035] Performing two Demura processes on the display panel can improve the display effect of the display panel and the compensation accuracy to some extent, but the improved accuracy is limited. At the same time, the two Demura processes not only increase the compensation cost but also have low compensation efficiency.

[0036] To solve the defects of the two Demura processes, the inventor found through on-site test data analysis that although the gray levels of the pixels in the display panel do not change linearly at different brightness levels, the change rate of the defect compensation amount of each pixel at different brightness levels does not change, that is, the defect compensation amount of each pixel at different brightness levels actually changes linearly with the brightness of the display panel.

[0037] Furthermore, the present application provides a method for compensating defects of a display panel. The first relationship function of the defect compensation amount of the pixel unit changing with the compensation coefficient of the display panel and the mapping relationship between the light emission intensity of the display panel and the compensation coefficient can be obtained in advance through the brightness data of the display panel at at least one light emission intensity. The first relationship function includes at least two constants. Then, the compensation coefficient required for the display panel at at least one light emission intensity is determined according to the mapping relationship, and the compensation data required for the display panel is determined according to the compensation coefficient required for the display panel and at least two constants in the first relationship function corresponding to a plurality of pixel units. Finally, the obtained compensation data is written into the display panel to compensate for the defects of the display panel at at least one light emission intensity, thereby achieving the effect of compensating the display panel twice without increasing the second defect compensation for the display panel, improving the defect compensation efficiency of the display panel, and especially for the display panel with severe yin-yang screen, effectively improving its yield.

[0038] In the present application, the defect compensation method for the display panel can adopt AP (Application Processor) compensation. AP compensation refers to the technology of using the application processor to compensate for the brightness, color, etc. of the display panel. It obtains the optical data of the display panel under different conditions and generates compensation parameters according to the optical data to improve the brightness non-uniformity (Mura) problem of the display panel.

[0039] In addition, the defect compensation method for the display panel provided by the embodiments of the present application can also be applied to a terminal device, and this method can be executed through an application software installed in the terminal device. Among them, the terminal device can be a desktop computer, a laptop computer, a tablet computer, a mobile phone, etc.

[0040] It should be noted that the application scenarios described in the above embodiments of the present application are for more clearly explaining the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art know that with the emergence of new application scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0041] The following will detail the defect compensation method for the display panel provided by the present application.

[0042] As Figure 1 shown, this method includes the following steps S110 to S140.

[0043] S110. Based on the brightness data of the display panel at at least one emission intensity, obtain the mapping relationship between the emission intensity of the display panel and the compensation coefficient, and the first relationship function of the defect compensation amount of the pixel unit changing with the compensation coefficient; the first relationship function includes at least two constants;

[0044] S120. Based on the mapping relationship, determine the compensation coefficient required for the display panel at at least one emission intensity;

[0045] S130. According to the compensation coefficient required for the display panel and at least two constants in the first relationship function corresponding to multiple pixel units, determine the compensation data required for the display panel at at least one emission intensity;

[0046] S140. Write the compensation data into the display panel to perform defect compensation on the display panel at at least one emission intensity.

[0047] In the present application, each value in the brightness data can be understood as the brightness at a position on the display panel, and at the same time, each value in the brightness data can be understood as a gray scale value.

[0048] For example, a display panel may include a plurality of pixel units, and each pixel unit may include at least one pixel dot on the display panel. Thus, each value in the luminance data can be further understood as the luminance of one or more pixels on the display panel, which can be characterized by a gray scale value. Additionally, the luminance data can also be understood as data of the display panel at at least one emission intensity, such as data of at least one pixel unit in the display panel at at least one emission intensity.

[0049] The emission intensity refers to the luminous intensity emitted per unit area, usually measured in nits (cd / m 2 ). The emission intensities and working principles of different types of display panels (such as LCD, OLED, MicroLED, etc.) are different.

[0050] The amount of defect compensation for each pixel unit in the display panel changes at different emission intensities, but the rate of change of the amount of defect compensation for each pixel unit at different emission intensities does not change. At the same time, when the display panel performs defect compensation at different emission intensities, the compensation coefficient required by the display panel also changes with the change of the emission intensity. The defect compensation of the display panel is actually the compensation of the amount of defect compensation for each pixel unit. Among them, the amount of defect compensation can be understood as the luminance compensation amount of each pixel unit at one emission intensity, that is, the gray scale offset value.

[0051] Therefore, when the rate of change of the amount of defect compensation for each pixel unit at different emission intensities does not change, this application can actually determine that there is a linear relationship between the compensation coefficient of the display panel and the amount of defect compensation for each pixel unit in the display panel, and this linear relationship can be characterized by the first relationship function mentioned in this application.

[0052] Furthermore, in the process of obtaining the first relationship function of the amount of defect compensation of the pixel unit changing with the compensation coefficient of the display panel in this application, the luminance data of the display panel at multiple emission intensities can be obtained in advance, and then the amount of defect compensation for each pixel unit in the display panel at different emission intensities can be obtained. Among them, the defect compensation of the display panel can include the luminance defect compensation of the display panel.

[0053] On this basis, the defect compensation amounts of each pixel unit at different emission intensities can be fitted, so as to obtain the mapping relationship between the emission intensity of the display panel and the compensation coefficient, and the first relationship function between the compensation coefficient of the display panel and the defect compensation amounts of each pixel unit in the display panel. Furthermore, the compensation coefficient required for the display panel at at least one emission intensity can be determined based on the mapping relationship, and the compensation data required for the display panel can be determined according to the compensation coefficient required for the display panel and at least two constants in the first relationship function corresponding to each pixel unit. Finally, the compensation data is written into the display panel to perform defect compensation on the display panel at at least one emission intensity. Among them, each pixel unit mentioned in this application can correspond to a first relationship function, and the first relationship functions corresponding to each pixel unit may be the same or different.

[0054] In this embodiment, the compensation coefficients required for each of the pixel units at the same emission intensity are the same, the compensation coefficient changes with the emission intensity, and the defect compensation amount of each pixel unit changes with the compensation coefficient.

[0055] Therefore, in the first relationship function in which the defect compensation amount of each pixel unit changes with the compensation coefficient, the defect compensation amount of each pixel unit can be understood as the dependent variable in the first relationship function, the compensation coefficient can be understood as the independent variable in the first relationship function, and there are at least two constants in the first relationship function, which can be understood as the first compensation brightness and the second compensation brightness of each pixel unit.

[0056] Furthermore, the first compensation brightness can be understood as the defect compensation amount when the compensation coefficient is 0, that is, the intercept in the first relationship function; the second compensation brightness can be understood as the change rate of the defect compensation amount of each pixel unit, that is, the slope in the first relationship function.

[0057] At the same time, since the compensation coefficients of all pixel units in the display panel mentioned in this application are the same at the same emission intensity, it is possible to save the compensation coefficients required for each pixel unit and reduce the Flash storage pressure of the DDIC chip.

[0058] For example, the compensation algorithm provided in this application can be: Gray_out = Gray_in + Gain * Offset + f(x), where Gray_out is the output gray scale value, Gray_in can be understood as the input gray scale value, Gain can be understood as the compensation coefficient, x is the pixel unit, and f(x) can be understood as the first compensation brightness, and Offset can be understood as the second compensation brightness.

[0059] It can be understood that, based on Gray_out = Gray_in + Gain * Offset, the present application actually introduces a variable, that is, f(x) can be understood as each pixel unit in the display panel corresponding to an additional compensation value, and there is a mapping relationship between f(x) and each pixel unit in the display panel.

[0060] Furthermore, the first relationship function corresponding to each pixel unit can actually be: Gray_out - Gray_in = Gain * Offset + f(x). Among them, Offset and f(x) can be understood as two constants in the first relationship function, and Gray_out - Gray_in can be understood as the defect compensation amount of each pixel unit at each light emission intensity.

[0061] At the same time, the mapping relationship between the light emission intensity and the compensation coefficient of the display panel mentioned in the present application can be understood as that at each nit of the display panel, there corresponds a compensation coefficient. Furthermore, it can be understood that the mapping relationship is actually a curve or a straight line of the compensation coefficient changing with the light emission intensity, that is, there is actually a linear relationship between the light emission intensity and the compensation coefficient.

[0062] The present application can obtain the mapping relationship between the light emission intensity and the compensation coefficient by using the brightness data of the display panel, specifically by fitting the brightness data of the display panel at different light emission intensities.

[0063] Therefore, when the present application adopts the brightness data of the display panel, it can obtain the mapping relationship between the light emission intensity and the compensation coefficient of the display panel, and the first relationship function of the defect compensation amount of the pixel unit changing with the compensation coefficient of the display panel through the brightness data of the display panel at at least one light emission intensity. Then, based on the mapping relationship, determine the compensation coefficient required for the display panel at at least one light emission intensity. And according to the compensation coefficient required for the display panel and at least two constants in the first relationship functions corresponding to multiple pixel units, determine the compensation data required for the display panel. Finally, write the obtained compensation data into the display panel to achieve defect compensation for the display panel at at least one light emission intensity.

[0064] It should be noted that the relationship between Offset and Gain in the compensation algorithm provided by the present application can actually also be characterized by ways such as Gain2 * Offse, Gain3 * Offse, Gainn * Offse, Offse Gain, etc., that is, in quadratic, cubic, n - th order, exponential and other ways. The present application does not make specific limitations on this.

[0065] Furthermore, in the first relational function mentioned in the present application, there may be more than two constants. Therefore, the compensation data of the display panel can actually be obtained through more than two constants and compensation coefficients.

[0066] It should also be noted that the pixel unit mentioned in the present application can be understood as a pixel composed of three light-emitting units R, G, and B in the display panel, but it is not limited to this. In fact, it can also be understood as a display unit in the display panel, and the display unit can include more than three light-emitting units, such as six light-emitting units.

[0067] In some embodiments, as Figure 2 shown, the defect compensation method of the display panel further includes steps S210 and S220.

[0068] S210: Collect the display images displayed by the display panel at multiple light-emitting intensities through an image acquisition device;

[0069] S220: Extract the brightness of multiple pixel units at multiple light-emitting intensities according to the display images to obtain brightness data.

[0070] Specifically, before obtaining the mapping relationship and the first relational function in the present application, it is also necessary to pre-obtain the brightness data of the display panel. To obtain the brightness data of the display panel, an image acquisition device can be used to collect the display images displayed by the display panel at multiple light-emitting intensities, and then extract the brightness of each pixel unit in the display panel at multiple light-emitting intensities from the display images. Furthermore, the brightness data of each pixel unit in the display panel at different light-emitting intensities, that is, the gray scale values of each pixel unit, can be obtained, which can also be understood as the input gray scale values in the compensation algorithm provided by the present application.

[0071] In the present application, after collecting the display images displayed by the display panel at multiple light-emitting intensities, the brightness of the display images can be recognized based on the size of the display panel to obtain the brightness of each pixel unit on the display panel. Furthermore, the first relational function between the compensation coefficient of the display panel and the defect compensation amount of each pixel unit in the display panel, and the mapping relationship between the light-emitting intensity of the display panel and the compensation coefficient can be determined through the brightness of each pixel unit on the display panel.

[0072] Among them, the image acquisition device includes an industrial camera, such as a CCD (Charge Coupled Device) camera or a CMOS (Complementary Metal Oxide Semiconductor) camera, etc.

[0073] In addition, it should be noted that when extracting the brightness of each pixel unit in the display panel at multiple emission intensities from the display image, the display image can be gridified based on the size of each pixel unit in the display panel, and then the brightness of each pixel unit can be extracted from each grid.

[0074] In some embodiments, as Figure 3 shown, step S110 includes steps S111, S112, and S113.

[0075] S111. Obtain the defect compensation amounts of multiple pixel units at multiple emission intensities from the brightness data;

[0076] S112. Obtain the first relationship function corresponding to multiple pixel units according to the defect compensation amounts of multiple pixel units at multiple emission intensities;

[0077] S113. Determine the mapping relationship between the emission intensity and the compensation coefficient of the display panel according to the defect compensation amounts of at least one pixel unit at multiple emission intensities and the corresponding first relationship function.

[0078] Specifically, in the process of obtaining the defect compensation amounts of each pixel unit in the display panel at different light intensities in this application, the brightness of each pixel unit at the corresponding emission intensity can be extracted from the brightness data of the display panel, and then the brightness data of each pixel unit at the same emission intensity can be classified to obtain the target brightness required for each pixel unit in the display panel. Then, by calculating based on the actual brightness and the target brightness of each pixel unit, the defect compensation amounts of each pixel in the display panel at different light intensities can be obtained.

[0079] Among them, the actual brightness of each pixel unit can be understood as the brightness of the pixel unit at the corresponding emission intensity, which can be directly obtained from the brightness data of the display panel.

[0080] In this application, after obtaining the defect compensation amounts of each pixel unit in the display panel corresponding to multiple emission intensities, the constants in the first relationship function corresponding to each pixel unit can be solved in advance through the defect compensation amounts of each pixel unit at multiple emission intensities. Then, based on the solved first relationship function and the defect compensation amounts of the pixel unit corresponding to this first relationship function at multiple emission intensities, the compensation coefficients of the display panel at different emission intensities can be determined. Then, by fitting the compensation coefficients and the emission intensities, the mapping relationship between the emission intensity and the compensation coefficient of the display panel can be obtained.

[0081] In some embodiments, the two constants in the first relationship function corresponding to each pixel unit are the first compensation brightness and the second compensation brightness respectively; in step S112, the first compensation brightness and the second compensation brightness required for multiple pixel units can be determined according to the defect compensation amounts of multiple pixel units at multiple light emission intensities; and the first relationship function corresponding to multiple pixel units can be generated according to the first compensation brightness and the second compensation brightness required for multiple pixel units.

[0082] Specifically, in the process of obtaining the first relationship function corresponding to multiple pixel units according to the defect compensation amounts of each pixel in the display panel at multiple light emission intensities, the present application can, on the basis that the change rate of the defect compensation amount does not change with the light emission intensity, obtain equations of at least two pixel units at at least three light emission intensities, and then an equation set containing at least six equations can be obtained. By solving this equation set while ensuring that the compensation coefficients at each light emission intensity remain unchanged, the first compensation brightness and the second compensation brightness of multiple pixel units in the display panel can be obtained. Then, the first relationship function between the defect compensation amount of the corresponding pixel unit and the compensation coefficient of the display panel can be constructed according to the first compensation brightness and the second compensation brightness.

[0083] Further, in some embodiments, in the process of determining the first compensation brightness and the second compensation brightness required for multiple pixel units according to the defect compensation amounts of multiple pixel units at multiple light emission intensities, specifically, the second relationship function between the first compensation brightnesses of multiple pixel units and the third relationship function between the second compensation brightnesses of multiple pixel units can be obtained according to the defect compensation amounts of multiple pixel units at multiple light emission intensities; and the first compensation brightness and the second compensation brightness required for multiple pixel units can be obtained according to the second relationship function and the third relationship function of multiple pixel units.

[0084] Specifically, in the process of obtaining the first compensation brightness and the second compensation brightness of each pixel unit, the present application can pre-determine the brightness offset amounts, i.e., the defect compensation amounts, of two pixel units at at least two light emission intensities (such as the first light emission intensity and the second light emission intensity), and then an equation set containing four equations can be obtained. By operating this equation set while ensuring that the compensation coefficients of each pixel unit remain unchanged at each light emission intensity, the second relationship function between the first compensation brightnesses of two pixel units and the third relationship function between the second compensation brightnesses of two pixel units can be obtained.

[0085] Furthermore, after determining the second relationship function and the third relationship function, according to the defect compensation amount of two pixel units at a certain light emission intensity (such as the third light emission intensity), the first compensation brightness and the second compensation brightness required for each of the two pixel units can be obtained.

[0086] Exemplarily, two pixel units are x1 and x2 respectively. The corresponding first compensation brightness can be represented by f(x1) and f(x2), the corresponding second compensation brightness can be represented by o(x1) and o(x2), and the compensation coefficients of the two pixel units at two light emission intensities can be represented by gain(n1) and gain(n2), where n1 and n2 are three light emission intensities respectively.

[0087] Suppose n1 and n2 are 20 nit and 2 nit respectively. The actual gray scale values of the two pixel units at 20 nit can be 1.5 and 0.9 respectively, and the actual gray scale values at 2 nit can be 1.9 and 0.8 respectively.

[0088] If the target gray scale values of the two pixel units are 1, then it can be determined that the defect compensation amounts of the two pixel units at 20 nit are -0.5 and 0.1 respectively, and the defect compensation amounts of the two pixel units at 2 nit are -0.9 and 0.2 respectively.

[0089] Based on this, four equations can be obtained, which are as follows:

[0090] f(x1)+o(x1)*gain(n1)=-0.5

[0091] f(x2)+o(x2)*gain(n1)=0.1

[0092] f(x1)+o(x2)*gain(n2)=-0.9

[0093] f(x2)+o(x2)*gain(n2)=0.2

[0094] After calculating the above four equations, the second relationship function between the first compensation brightness of the two pixel units and the third relationship function between the second compensation brightness of the two pixels can be obtained. Among them, the second relationship function can be f(x1)+4f(x2)=-0.1, and the third relationship function can be o(x1)=-4o(x2).

[0095] It can be seen that there is a linear relationship between the first compensation brightness of any two pixels in the display panel and between the second compensation brightness of any two pixels. Based on this, the present application can actually, on the basis of the above, combine the defect compensation amounts of another pixel unit at two light emission intensities (such as the first light emission intensity and the second light emission intensity) to obtain the first compensation brightness and the second compensation brightness of each of the three pixel units.

[0096] In some embodiments, when obtaining the first compensation brightness and the second compensation brightness of at least two pixel units in the display panel, the present application can further determine the defect compensation amounts of the two pixel units at three light emission intensities, and then an equation set containing six equations can be obtained. By solving this equation set while ensuring that the compensation coefficients at each light emission intensity remain unchanged, the first compensation brightness and the second compensation brightness of the two pixel units can be obtained respectively.

[0097] Exemplarily, the three pixel units are x1, x2, and x3 respectively. The corresponding first compensation brightness can be characterized by f(x1), f(x2), and f(x3), and the corresponding second compensation brightness can be characterized by o(x1), o(x2), and o(x3). The compensation coefficients of the two light-emitting pixel units at two light emission intensities can be characterized by gain(n1), gain(n2), and gain(n3), where n1, n2, and n3 are the three light emission intensities respectively.

[0098] Suppose n1, n2, and n3 are 20 nit, 10 nit, and 2 nit respectively. The actual gray scale values of the two pixel units at 20 nit can be 1.5 and 0.9 respectively, the actual gray scale values at 10 nit can be 1.7 and 0.85 respectively, and the actual gray scale values at 2 nit can be 1.9 and 0.8 respectively.

[0099] If the target gray scale value of the two pixel units is 1, then the defect compensation amounts of the two pixels at 20 nit can be determined to be -0.5 and 0.1 respectively, the defect compensation amounts of the two pixel units at 10 nit can be -0.7 and 0.15 respectively, and the defect compensation amounts of the two pixel units at 2 nit can be -0.9 and 0.2 respectively.

[0100] Based on this, six equations can be obtained, which are as follows respectively:

[0101] f(x1)+o(x1)*gain(n1)=-0.5

[0102] f(x2)+o(x2)*gain(n1)=0.1

[0103] f(x1)+o(x2)*gain(n2)=-0.7

[0104] f(x2)+o(x2)*gain(n2)=0.15

[0105] f(x1)+o(x2)*gain(n3)=-0.9

[0106] f(x2)+o(x2)*gain(n3)=0.2

[0107] Calculating the above six equations can obtain f(x1) = -0.3, o(x1) = -0.2, f(x2) = 0.05, o(x2) = 0.05. Furthermore, the corresponding first relationship functions of the two pixel units can be obtained as Gray_out - Gray_in = -0.2 * gain(n1) - 0.3 and Gray_outt - Gray_in = 0.05 * gain(n1) + 0.05 respectively.

[0108] Furthermore, after determining the first relationship functions of the two pixel units respectively, the compensation coefficients of the display panel at 20 nit, 10 nit, and 2 nit can be obtained from the first relationship functions of the two pixel units respectively. Fitting them can obtain the mapping relationship between the luminous intensity and the compensation coefficient of the display panel. In subsequent compensation, only through the mapping relationship can the compensation coefficient of the display panel at each luminous intensity be obtained.

[0109] In some embodiments, the two constants in the first relationship function corresponding to each pixel unit are the first compensation brightness and the second compensation brightness respectively; in step S112, the first compensation brightness and the second compensation brightness required by at least two pixel units can be obtained according to the defect compensation amounts of multiple pixel units at multiple luminous intensities; according to the first compensation brightness and the second compensation brightness required by at least two pixel units, at least two first relationship functions corresponding to the pixel units are generated.

[0110] Furthermore, in step S113, the compensation coefficients required by the display panel at multiple luminous intensities can be determined according to the defect compensation amounts of at least one pixel unit at multiple luminous intensities and the corresponding first relationship function; according to the compensation coefficients required by the display panel at multiple luminous intensities, the mapping relationship between the luminous intensity and the compensation coefficient of the display panel is determined.

[0111] In this application, since the compensation coefficients of the display panel at the corresponding luminous intensity are the same when compensating for the defects of the display panel, the compensation coefficients corresponding to each pixel at the same luminous intensity are the same. Furthermore, after obtaining the first relationship function between the defect compensation amount and the luminous intensity of any pixel unit in this application, the compensation coefficient of the display panel at each luminous intensity can be determined from this first relationship function, and then the compensation coefficients at multiple luminous intensities are fitted to obtain the mapping relationship between the luminous intensity and the compensation coefficient of the display panel.

[0112] For example, after determining the first relationship function corresponding to a pixel unit in the present application, the compensation coefficients of the display panel at 20 nit, 10 nit, and 2 nit can be obtained from the first relationship function as 1, 2, and 3 respectively. By fitting them, the mapping relationship between the luminous intensity of the display panel and the compensation coefficient can be obtained. Subsequently, when performing compensation, the compensation coefficient of the display panel at any luminous intensity can be obtained only through the mapping relationship.

[0113] In some embodiments, the two constants in the first relationship function in which the defect compensation amount of each pixel unit changes with the compensation coefficient of the display panel are the first compensation brightness and the second compensation brightness respectively; in determining the compensation data required for the display panel at at least one luminous intensity according to the compensation coefficient required for the display panel and at least two constants in the first relationship functions corresponding to multiple pixel units, the compensation values required for multiple pixel units at at least one luminous intensity can be determined according to the first compensation brightness and the second compensation coefficient required for multiple pixel units and the compensation coefficient required for the display panel at at least one luminous intensity; each compensation value corresponds to a pixel unit and a luminous intensity; according to the compensation values required for multiple pixel units at at least one luminous intensity, the compensation parameters required for the display panel at at least one luminous intensity are determined; the compensation parameters include multiple compensation values; according to the compensation parameters required for the display panel at at least one luminous intensity, the compensation data required for the display panel at at least one luminous intensity is determined; the compensation data includes the compensation parameters of the display panel at at least one luminous intensity.

[0114] In this embodiment, the compensation data required for the display panel can be composed of the compensation parameters of the display panel at multiple luminous intensities. Each compensation parameter can perform display defect compensation on the display panel at one luminous intensity. Each compensation parameter can be composed of the compensation values of multiple pixel units at the corresponding luminous intensity. At the same time, when performing display defect compensation on the display panel at a certain luminous intensity (such as the target luminous intensity), the display defects of one or more pixel units in the display panel can be compensated. The compensation value required for each pixel unit can specifically generate the compensation value of at least one pixel unit at the target luminous intensity according to the first compensation brightness and the second compensation coefficient required for at least one pixel unit and the compensation coefficient of the display panel at a certain luminous intensity. Then, the compensation values required for compensating the display defects of one or more pixel units in the display panel at at least one luminous intensity can be obtained. After that, the compensation parameters of the display panel at at least one luminous intensity can be determined based on this. Finally, based on multiple compensation parameters (each compensation parameter corresponds to one luminous intensity), the compensation data required for the display panel at at least one luminous intensity can be obtained.

[0115] In the defect compensation method of the display panel provided in this application, the first relationship function of the defect compensation amount of the pixel unit changing with the compensation coefficient of the display panel and the mapping relationship between the light emission intensity of the display panel and the compensation coefficient can be obtained in advance through the brightness data of the display panel at at least one light emission intensity. The first relationship function includes at least two constants. Then, according to the mapping relationship, the compensation coefficients required for the display panel at at least one light emission intensity are determined, and according to the compensation coefficients required for the display panel and at least two constants in the first relationship function corresponding to multiple pixel units, the compensation data required for the display panel is determined. Finally, the obtained compensation data is written into the display panel to perform defect compensation on the display panel at at least one light emission intensity, achieving the effect of compensating the display panel twice without adding a second defect compensation to the display panel, improving the defect compensation efficiency of the display panel. Especially for the display panel with severe yin-yang screen, the yield can be effectively improved.

[0116] An embodiment of this application also provides a defect compensation device 300 for a display panel, and this device is used to execute any embodiment of the foregoing defect compensation method for the display panel.

[0117] Specifically, please refer to Figure 4 , Figure 4 which is a schematic block diagram of the defect compensation device 300 for the display panel provided in this application.

[0118] As Figure 4 shown, the defect compensation device 300 for the display panel includes: an acquisition unit 310, a first determination unit 320, a second determination unit 330, and a writing unit 340.

[0119] The acquisition unit 310 is configured to obtain the mapping relationship between the light emission intensity of the display panel and the compensation coefficient, and the first relationship function of the defect compensation amount of the pixel unit changing with the compensation coefficient based on the brightness data of the display panel at at least one light emission intensity; the first relationship function includes at least two constants; the first determination unit 320 is configured to determine the compensation coefficients required for the display panel at at least one light emission intensity based on the mapping relationship; the second determination unit 330 is configured to determine the compensation data required for the display panel at at least one light emission intensity according to the compensation coefficients required for the display panel and at least two constants in the first relationship function corresponding to multiple pixel units; the writing unit 340 is configured to write the compensation data into the display panel to perform defect compensation on the display panel at at least one light emission intensity.

[0120] Among them, functional units such as the obtaining unit 310, the first determining unit 320, the second determining unit 330, and the writing unit 340 can be respectively used to execute the steps S110 - S140 of the foregoing method embodiments. For the specific implementation details of these functional units, reference can be made to the content of the corresponding method step embodiments, which will not be elaborated here.

[0121] The defect compensation device 300 for a display panel provided by an embodiment of the present application can, through the brightness data of the display panel at at least one emission intensity, pre-obtain a first relationship function of the defect compensation amount of pixel units changing with the compensation coefficient of the display panel, and the mapping relationship between the emission intensity of the display panel and the compensation coefficient. The first relationship function includes at least two constants. Then, according to the mapping relationship, the compensation coefficient required for the display panel at at least one emission intensity is determined, and according to the compensation coefficient required for the display panel and at least two constants in the first relationship function corresponding to a plurality of pixel units, the compensation data required for the display panel is determined. Finally, the obtained compensation data is written into the display panel to perform defect compensation on the display panel at at least one emission intensity, achieving the effect of compensating the display panel twice without adding a second defect compensation to the display panel, improving the defect compensation efficiency of the display panel. Especially for a display panel with severe yin-yang screen, its yield can be effectively improved.

[0122] It should be noted that those skilled in the art can clearly understand that the specific implementation processes of the above-mentioned defect compensation device 300 for a display panel and each unit can refer to the corresponding descriptions in the foregoing method embodiments. For the convenience and conciseness of description, they will not be elaborated here.

[0123] The above-mentioned defect compensation device 300 for a display panel can be implemented in the form of a computer program, and this computer program can run on an electronic device as shown in Figure 5 the following.

[0124] Please refer to Figure 5 , Figure 5 which is a schematic block diagram of an electronic device provided by the present application. The electronic device 400 can be a terminal. Among them, the terminal can be a cloud, an in-vehicle terminal device, a smart phone, a tablet computer, a notebook computer, a desktop computer, a personal digital assistant, a wearable device, etc.

[0125] Referring to Figure 5 , the electronic device 400 includes a processor 402, a memory, and a network interface 405 connected through a system bus 401. Among them, the memory can include a non-volatile storage medium 403 and an internal memory 404.

[0126] The non-volatile storage medium 403 can store an operating system 4031 and a computer program 4032. The computer program 4032 includes program instructions which, when executed, can cause the processor 402 to execute a method for compensating for defects in a display panel.

[0127] The processor 402 is used to provide computing and control capabilities to support the operation of the entire electronic device 400.

[0128] The internal memory 404 provides an environment for the operation of the computer program 4032 in the non-volatile storage medium 403. When the computer program 4032 is executed by the processor 402, it can cause the processor 402 to execute a method for compensating for defects in a display panel.

[0129] The network interface 405 is used for network communication with other devices. Those skilled in the art can understand that Figure 5 the structure shown in is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the electronic device 400 to which the solution of this application is applied. The specific electronic device 400 may include more or fewer components than those shown in the figure, or combine some components, or have a different component layout.

[0130] Among them, the processor 402 is used to run the computer program 4032 stored in the memory to implement the following steps: based on the luminance data of the display panel at at least one emission intensity, obtain the mapping relationship between the emission intensity of the display panel and the compensation coefficient, and the first relationship function of the defect compensation amount of the pixel unit changing with the compensation coefficient; the first relationship function includes at least two constants; based on the mapping relationship, determine the compensation coefficients required for the display panel at at least one emission intensity; according to the compensation coefficients required for the display panel and at least two constants in the first relationship functions corresponding to multiple pixel units, determine the compensation data required for the display panel at at least one emission intensity; write the compensation data into the display panel to compensate for the defects of the display panel at at least one emission intensity.

[0131] It should be understood that in the embodiments of the present application, the processor 402 may be a central processing unit (CPU), and the processor 402 may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0132] According to one aspect of the present application, there is also provided a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the electronic device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the electronic device can implement the following steps: based on the luminance data of the display panel at at least one emission intensity, obtain the mapping relationship between the emission intensity of the display panel and the compensation coefficient, and the first relationship function of the defect compensation amount of the pixel unit changing with the compensation coefficient; the first relationship function includes at least two constants; based on the mapping relationship, determine the compensation coefficients required for the display panel at at least one emission intensity; according to the compensation coefficients required for the display panel and at least two constants in the first relationship functions corresponding to a plurality of pixel units, determine the compensation data required for the display panel at at least one emission intensity; write the compensation data into the display panel to perform defect compensation on the display panel at at least one emission intensity.

[0133] Those of ordinary skill in the art can understand that all or part of the processes of the methods in the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program includes program instructions, and the computer program can be stored in a storage medium, and the storage medium is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the embodiments of the above methods.

[0134] Therefore, the present application also provides a storage medium. The storage medium may be a computer-readable storage medium. The storage medium stores a computer program, where the computer program includes program instructions. When the program instructions are executed by a processor, the processor performs the following steps: obtaining a mapping relationship between the emission intensity of the display panel and a compensation coefficient, and a first relationship function of the defect compensation amount of the pixel unit changing with the compensation coefficient based on the luminance data of the display panel at at least one emission intensity; the first relationship function includes at least two constants; determining the compensation coefficient required for the display panel at at least one emission intensity based on the mapping relationship; determining the compensation data required for the display panel at at least one emission intensity according to the compensation coefficient required for the display panel and at least two constants in the first relationship function corresponding to a plurality of pixel units; and writing the compensation data into the display panel to perform defect compensation on the display panel at at least one emission intensity.

[0135] The storage medium may be a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk, an optical disc, or other various computer-readable storage media that can store program codes.

[0136] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the examples have been generally described according to their functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0137] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of each unit is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0138] The steps in the method embodiments of the present application can be adjusted, combined, and deleted according to actual needs. The units in the device embodiments of the present application can be combined, divided, and deleted according to actual needs. In addition, the functional units in each embodiment of the present application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.

[0139] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing an electronic device (which may be a personal computer, a terminal, or a network device, etc.) to execute all or part of the steps of the methods provided in various embodiments of the present application.

[0140] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for compensating defects of a display panel, characterized in that: The display panel includes a plurality of pixel units, and the method includes: Based on brightness data of the display panel under at least one luminous intensity, obtaining a mapping relationship between the luminous intensity of the display panel and the compensation coefficient, and a first relationship function of the defect compensation amount of the pixel unit varying with the compensation coefficient; the first relationship function includes at least two constants; Based on the mapping relationship, determining a compensation coefficient required for the display panel under at least one luminous intensity; Determining compensation data required by the display panel under at least one luminous intensity according to a compensation coefficient required by the display panel and at least two constants in a first relationship function corresponding to a plurality of the pixel units; The compensation data is written into the display panel to perform defect compensation on the display panel at at least one luminous intensity.

2. The defect compensation method of a display panel according to claim 1, characterized in that: Before obtaining the first relationship function and the mapping relationship, the method further includes: Capturing, by an image acquisition device, a display image displayed by the display panel under multiple luminous intensities; According to the display image, the brightness of the plurality of pixel units under a plurality of luminous intensities is extracted to obtain the brightness data.

3. The defect compensation method of a display panel according to claim 1, characterized in that: The step of acquiring a mapping relationship between the luminous intensity of the display panel and the compensation coefficient, and a first relationship function of a defect compensation amount of a plurality of pixel units varying with the compensation coefficient based on the brightness data of the display panel under at least one luminous intensity, comprises: Obtaining defect compensation amounts of the plurality of pixel units at a plurality of luminous intensities from the brightness data; According to the defect compensation amounts of the plurality of pixel units at a plurality of luminous intensities, obtaining first relationship functions corresponding to the plurality of pixel units; A mapping relationship between the luminous intensity of the display panel and the compensation coefficient is determined according to the defect compensation amount of at least one of the pixel units under multiple luminous intensities and the corresponding first relationship function.

4. The defect compensation method of a display panel according to claim 3, characterized in that: The two constants in the first relationship function corresponding to each pixel unit are respectively a first compensation brightness and a second compensation brightness; The step of obtaining first relationship functions corresponding to the plurality of pixel units according to the defect compensation amounts of the plurality of pixel units at the plurality of luminous intensities comprises: Determining first compensation brightness and second compensation brightness required by the plurality of pixel units according to defect compensation amounts of the plurality of pixel units at a plurality of luminous intensities; A first relationship function corresponding to the plurality of pixel units is generated according to the first compensation brightness and the second compensation brightness required by the plurality of pixel units.

5. The defect compensation method of a display panel according to claim 4, characterized in that: The step of determining the first compensation brightness and the second compensation brightness required by the plurality of pixel units according to the defect compensation amounts of the plurality of pixel units at the plurality of luminous intensities comprises: According to the defect compensation amounts of the plurality of pixel units at the plurality of luminous intensities, obtaining a second relationship function between the first compensation brightness of the plurality of pixel units and a third relationship function between the second compensation brightness of the plurality of pixel units; According to the second relationship function and the third relationship function of the plurality of pixel units, the first compensation brightness and the second compensation brightness required by the plurality of pixel units are obtained.

6. The defect compensation method of a display panel according to claim 3, characterized in that: Determining the mapping relationship between the luminous intensity of the display panel and the compensation coefficient according to the defect compensation amount of at least one of the pixel units under multiple luminous intensities and the corresponding first relationship function includes: Determining compensation coefficients required for the display panel at multiple luminous intensities according to defect compensation amounts of at least one of the pixel units at multiple luminous intensities and corresponding first relationship functions; According to the compensation coefficient required by the display panel under multiple luminous intensities, a mapping relationship between the luminous intensity of the display panel and the compensation coefficient is determined.

7. The defect compensation method of a display panel according to claim 1, characterized in that: The two constants in the first relationship function corresponding to each pixel unit are respectively a first compensation brightness and a second compensation brightness; The step of determining the compensation data required by the display panel under at least one luminous intensity according to the compensation coefficient required by the display panel and at least two constants in the first relationship function corresponding to the plurality of pixel units comprises: Determine the compensation values ​​required by the plurality of pixel units under at least one luminous intensity according to the first compensation brightness and the second compensation coefficient required by the plurality of pixel units and the compensation coefficient required by the display panel under at least one luminous intensity; each compensation value corresponds to a pixel unit and a luminous intensity; Determining compensation parameters required by the display panel at at least one luminous intensity according to compensation values ​​required by the plurality of pixel units at at least one luminous intensity; the compensation parameters comprising a plurality of compensation values; According to the compensation parameters required by the display panel at at least one luminous intensity, compensation data required by the display panel at at least one luminous intensity is determined; the compensation data includes the compensation parameters of the display panel at at least one luminous intensity.

8. The defect compensation method for a display panel according to any one of claims 1 to 7, characterized in that: Each of the pixel units requires the same compensation coefficient under the same luminous intensity.

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the display panel defect compensation method according to any one of claims 1 to 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the defect compensation method for a display panel according to any one of claims 1 to 8 are implemented.

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