WO2020233595A1 - 确定像素补偿值的方法和装置、电子设备、存储介质 - Google Patents
确定像素补偿值的方法和装置、电子设备、存储介质 Download PDFInfo
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- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
- G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
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- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
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Definitions
- the present disclosure belongs to the field of display technology, and specifically relates to methods and devices for determining pixel compensation values, electronic equipment, and storage media.
- An aspect of the present disclosure provides a method for determining a pixel compensation value, which includes:
- the compensation value of the pixel in the three test gray levels is calculated respectively, and the compensation value of the pixel in any gray level can make the actual brightness of the pixel A gray scale equal to the standard brightness of the gray scale;
- the compensation value y of the pixel in the gray scale x is calculated, where Ratio is the adjustment coefficient corresponding to the gray scale x.
- Lmax is the maximum theoretical brightness of the pixel
- x is the grayscale
- X is the maximum grayscale.
- the order, gamma is the current gamma value.
- the calculation of the compensation value of the pixel in the three test gray levels according to the actual brightness and the standard brightness of the pixel in the three test gray levels respectively includes:
- the adjustment coefficients of the pixels in the gray levels of multiple nodes are calculated by interpolation.
- the number of node gray levels is greater than 3 and is evenly distributed in all gray levels.
- the method further includes:
- Each pixel is displayed in a plurality of re-measured gray levels according to corresponding compensation values, and the actual brightness of the pixel in each re-measured gray level is obtained;
- An aspect of the present disclosure provides an apparatus for determining a pixel compensation value, which includes:
- the test circuit is used to display the pixels in three test gray levels respectively, and obtain the actual brightness of the pixels in each test gray level respectively;
- the first compensation value calculation circuit is used to calculate the compensation value of the pixel in the three test gray levels according to the actual brightness and standard brightness of the pixel in the three test gray levels, and the compensation value of the pixel in any gray level can be Make the actual brightness of the pixel equal to the gray scale of the standard brightness of the gray scale;
- the first compensation value calculation circuit is specifically used for:
- the device for determining the pixel compensation value further includes:
- the adjustment coefficient calculation circuit is used to calculate the adjustment coefficients of the pixels in each of the other gray levels by interpolation according to the preset adjustment coefficients of the pixels in the gray levels of multiple nodes.
- the device for determining the pixel compensation value further includes a retest circuit for:
- An aspect of the present disclosure provides an electronic device including:
- One or more processors are One or more processors;
- the memory is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors can realize any one of the above-mentioned determining pixel compensation values Methods.
- An aspect of the present disclosure provides a computer-readable storage medium on which a computer program is stored
- any one of the above methods for determining the pixel compensation value can be realized.
- Fig. 1 is a flowchart of a method for determining a pixel compensation value according to an embodiment of the present disclosure
- FIG. 2 is a block diagram of a device for determining a pixel compensation value according to an embodiment of the present disclosure
- FIG. 3 is a block diagram of a display device according to an embodiment of the disclosure.
- each circuit and device involved in the embodiments of the present disclosure may correspond to only one physical structure, or may be composed of multiple physical structures, or multiple circuits and devices may also be integrated into one physical structure.
- each block in the flowchart or block diagram may represent a circuit, device, program segment, or code, which contains executable instructions for implementing prescribed functions.
- each block or combination of blocks in the block diagrams and flowcharts can be implemented by a hardware-based system that implements specified functions, or can be implemented by a combination of hardware and computer instructions.
- circuits and devices involved in the embodiments of the present disclosure may be implemented in software or hardware, for example, the circuits and devices may be located in a processor.
- De-Mura solutions in related technologies can include: display the display panel in a certain gray scale before leaving the factory, and use a CCD (charge coupled device) camera to collect the actual brightness of each pixel to find out the actual brightness and the standard brightness (That is, the theoretical brightness that the pixel should have in the gray scale)
- the pixel with the difference is the pixel with Mura
- the compensation value is set for the pixel with Mura according to the above difference; when the pixel with Mura should be in the gray scale (such as When displaying 100 gray scales, it is actually displayed according to the compensation value (for example, 105 gray scales), so that the actual brightness (the actual brightness of 105 gray scales) is equal to the standard brightness (the theoretical brightness of 100 gray scales).
- the compensation value for each gray level Due to time constraints, it is generally not possible to directly measure the compensation value for each gray level in the above manner. Instead, only two or three specific gray levels can be selected as test gray levels, and the compensation values of these test gray levels are measured.
- the compensation value of the gray scale is calculated according to the compensation value of the test gray scale.
- the compensation value obtained by the existing calculation method is not accurate. Therefore, the actual brightness of the pixel may still differ greatly from the standard brightness when the pixel is displayed according to the compensation value in other gray scales, and the mura defect cannot be effectively eliminated.
- an embodiment of the present disclosure provides a method for determining a pixel compensation value.
- the method of this embodiment is used to determine the compensation value of the pixel (or sub-pixel) in each gray level, so that the pixel can actually perform the compensation value of the gray level A (such as the gray level B) when a certain gray level A is to be displayed. Display, and then ensure that the actual brightness of the pixel is equal to the standard brightness (that is, the theoretical brightness that the pixel should have in gray scale A), thereby eliminating the Mura defect.
- the display panel actually includes many pixels, and the compensation value of each pixel can be determined separately according to the method of this embodiment.
- this embodiment only takes the process of determining the compensation value of one pixel as an example for description.
- the method for determining the pixel compensation value in this embodiment includes steps S01 to S07.
- step S01 the pixel is displayed in three test gray levels, and the actual brightness of the pixel in each test gray level is obtained.
- the pixel is displayed in three preset test gray levels, and the image of the pixel is collected through a CCD camera or the like during display to obtain the actual brightness of the three test grays of the pixel.
- test gray scales there are no special regulations for the selection of test gray scales, which can be selected based on experience, but generally speaking, the three test gray scales should be relatively evenly distributed among all gray scales. For example, for 256 gray scales (ie 0 ( ⁇ 255 gray levels) of the display panel, the three selected test gray levels can be 32 gray levels, 96 gray levels, and 192 gray levels.
- this step can actually display the display panel in the test grayscale, and collect the image of the display panel, and then analyze the actual brightness of each pixel.
- step S02 according to the actual brightness and standard brightness of the pixel in the three test gray levels, the compensation values of the pixel in the three test gray levels are respectively calculated.
- the compensation value of the pixel at any gray scale is a gray scale that can make the actual brightness of the pixel equal to the standard brightness of the gray scale.
- the standard brightness of a pixel in a certain gray scale refers to the theoretical brightness that the pixel should have in the corresponding gray scale. Therefore, if the actual brightness of the pixel in a test grayscale is different from the standard brightness (or the difference exceeds the threshold), it indicates that it is a pixel with poor Mura, so it needs to be calculated according to the difference between the actual brightness and the standard brightness
- the compensation value of the pixel in the test grayscale means that when the pixel is to be displayed in the corresponding gray scale, it should actually be displayed according to the gray scale of the compensation value, so that its actual brightness is equal to the standard brightness of the corresponding gray scale.
- the compensation value may not be set for it, that is, it is not necessary Subsequent calculation; alternatively, it can also be considered that the compensation value of any gray scale for pixels without defective Mura is directly equal to the corresponding gray scale.
- this step (S02) may include steps S021 to S023.
- step S04 in some embodiments, according to the preset adjustment coefficients of the pixels in the gray levels of multiple nodes, the adjustment coefficients of the pixels in each of the other gray levels are calculated by interpolation.
- the number of node gray levels is greater than 3 and is evenly distributed in all gray levels.
- the number of node gray levels should be more than the test gray levels to improve the accuracy of the compensation value calculation; and the distribution of node gray levels in all gray levels should be relatively uniform, that is, different groups of adjacent ones The difference in the number of gray levels between node gray levels should be as small as possible.
- the node gray levels can be 0 gray levels, 16 gray levels, 32 gray levels, 48 gray levels, 64 gray levels Gray scale, 80 gray scale, 96 gray scale, 112 gray scale, 128 gray scale, 144 gray scale, 160 gray scale, 176 gray scale, 192 gray scale, 208 gray scale, 224 gray scale, 240 gray scale, 255 gray scale;
- the number of gray levels between the gray levels of any adjacent node is 15 except that the number of gray levels between the 240 gray level and the 255 gray level is 14.
- the interpolation method means that the gray scales of two adjacent nodes and the adjustment coefficients of other gray scales between the two are linearly distributed. For example, if the adjustment coefficient of the above 0 gray scale is Ratio_0 and the adjustment coefficient of 16 gray scale is Ratio_16, then:
- this step (S04) is optional.
- the setting of the above adjustment coefficients should ensure that for the three test gray levels, the compensation value calculated in the subsequent step S05 is the same as the compensation value calculated in the above step S02, that is, at least part of the adjustment coefficient is based on the test gray level
- the known compensation value is set.
- the adjustment coefficient for each gray scale can be calculated, and then the compensation value for each gray scale can be obtained.
- the amount of storage and calculation required is small. , Easy to implement; on the other hand, the adjustment coefficient can be flexibly set according to the actual situation, so as to obtain the compensation value for each gray scale more accurately, and achieve a better display effect.
- the compensation value y corresponding to any gray level x is calculated according to the above formula.
- the compensation value of the pixel at any gray scale can be obtained through a specific calculation, and the calculation method of the compensation value is different from the existing method, and is more reasonable, so that the obtained compensation value is also more Accurate.
- the compensation value When displaying according to the compensation value, a better display effect can be obtained, and Mura defects can be eliminated.
- step S06 in some embodiments, the pixels are displayed in a plurality of re-measured gray levels according to corresponding compensation values, and the actual brightness of the pixels in each re-measured gray level is obtained.
- the pixel After obtaining the compensation value of the pixel in each gray scale, the pixel is displayed according to the corresponding compensation value in some specific gray scale (re-test gray scale), and the actual brightness of the pixel when the pixel is displayed according to the compensation value is collected by a CCD camera or the like.
- step S07 it is determined whether the difference between the actual brightness of the pixel in the multiple retest gray levels and the standard brightness meets the preset standard.
- the adjustment coefficient of the node gray scale can be reset, and the above step S04 is returned to recalculate the adjustment coefficients of all gray scales according to the reset adjustment coefficient, and then Recalculate the compensation value of each gray scale.
- the above method continuously adjusts in a cyclic manner to obtain the most suitable adjustment coefficient Ratio, thereby obtaining a more reasonable compensation value, and further improving the accuracy of the compensation value.
- the above steps S06 and S07 can be performed only when the pixel compensation value is determined for the first display panel to obtain a set of adjustment coefficients for the gray levels of the corresponding nodes;
- the corresponding adjustment coefficient can be directly used instead of the above steps S06 and S07.
- an embodiment of the present disclosure provides a device for determining a pixel compensation value, which includes:
- the test circuit is used to make the pixel display in three test gray levels, and obtain the actual brightness of the pixel in each test gray level;
- the first compensation value calculation circuit is used to calculate the compensation value of the pixel in the three test gray levels according to the actual brightness and standard brightness of the pixel in the three test gray levels.
- the compensation value of the pixel in any gray scale is a gray scale that can make the actual brightness of the pixel equal to the standard brightness of the gray scale;
- the first compensation value calculation circuit is specifically used for:
- the device for determining the pixel compensation value further includes:
- the adjustment coefficient calculation circuit is used to calculate the adjustment coefficients of the pixels in each of the other gray levels by interpolation according to the preset adjustment coefficients of the pixels in the gray levels of multiple nodes.
- the device for determining the pixel compensation value further includes a retest circuit for:
- the device for determining the pixel compensation value of this embodiment can perform the above method for determining the pixel compensation value, so that a more reasonable compensation value can be obtained to improve the display effect of the display panel.
- each circuit in the above device for determining the pixel compensation value may include a storage medium (such as a hard disk) with the ability to store data, a processor (such as a CPU) with the ability to execute software programs, and a device with physical functions (such as CCD). Cameras), devices with the ability to output data to the display device (such as burning equipment), etc., will not be described in detail here.
- an embodiment of the present disclosure provides a display device in which the compensation value obtained according to the above method is stored or has a calculation circuit capable of determining the compensation value in the above manner.
- the display panel can be displayed according to the above compensation value to improve the display effect.
- the structure of the display device can refer to Figure 3, the compensation value is stored in the Flash (flash memory) device; the Data_Align (data alignment) device is used to receive the original display data (that is, the gray scale of each pixel derived from the image to be displayed) Level), and determine the gray level for each pixel, and send it to the Compensation (compensation) device; while the SRAM (static random access memory) device reads the compensation value from the Flash device and uses the DE-COMPRESS (decompression) device After decompression, it is sent to the Compensation device; the Compensation device obtains the gray scale that each pixel should actually display, that is, generates compensation display data, and sends it to the display panel for display by the display panel.
- the Data_Align data alignment
- the SRAM static random access memory
- the above Data_Align device, Compensation device, SRAM device, DE-COMPRESS device, etc. may be independent processors, or may be integrated in a chip (IC).
- the display device may actually only store the above adjustment coefficient Ratio and the compensation value y'of the test pixel, and the compensation value when the pixel is actually displayed is calculated by the Compensation device according to the above formula each time it is displayed .
- the display device can be any liquid crystal display device (LCD), organic light emitting diode (OLED) display device, electronic paper, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame, navigator, etc. Products or parts.
- LCD liquid crystal display device
- OLED organic light emitting diode
- An embodiment of the present disclosure provides an electronic device, which includes:
- One or more processors are One or more processors;
- the memory is used to store one or more programs.
- the one or more processors can implement any one of the foregoing methods for determining pixel compensation values.
- An embodiment of the present disclosure provides a computer-readable medium on which a computer program is stored, and when the computer program is executed by a processor, any one of the above methods for determining a pixel compensation value can be implemented.
- the computer-readable medium may be included in the device, equipment, or system of the present disclosure, or may exist alone.
- the computer-readable storage medium can be any tangible medium that contains or stores a program, which can be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device. More specific examples include but are not limited to: Electrical connection of multiple wires, portable computer disk, hard disk, optical fiber, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), portable compact disk read only memory ( CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.
- a program can be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device. More specific examples include but are not limited to: Electrical connection of multiple wires, portable computer disk, hard disk, optical fiber, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), portable compact disk read only memory ( CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.
- a computer-readable storage medium may also include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. Specific examples thereof include, but are not limited to, electromagnetic signals, optical signals, or any of them as appropriate. The combination.
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Abstract
Description
Claims (12)
- 一种确定像素补偿值的方法,包括:使像素分别在三个测试灰阶进行显示,并分别获得所述像素在各测试灰阶的实际亮度;根据所述像素在三个测试灰阶的实际亮度和标准亮度,分别计算出所述像素在三个测试灰阶的补偿值,所述像素在任意灰阶的补偿值为能使像素的实际亮度等于该灰阶的标准亮度的灰阶;根据公式y’=x’*Gain1 2+x’*Gain2+Offset计算出标准系数Gain1、Gain2、Offset,其中x’为测试灰阶,y’为所述像素在测试灰阶x’的补偿值;以及根据公式y=(x*Gain1 2+x*Gain2+Offset)*Ratio+x计算像素在灰阶x的补偿值y,其中Ratio为对应灰阶x的调整系数。
- 根据权利要求1所述的确定像素补偿值的方法,其中,所述像素在任意灰阶的标准亮度Lb通过公式Lb=Lmax*(x/X) gamma计算得到,其中Lmax为像素的最大理论亮度,x为灰阶,X为最大灰阶,gamma为当前伽马值。
- 根据权利要求1所述的确定像素补偿值的方法,其中,所述根据像素在三个测试灰阶的实际亮度和标准亮度,分别计算出像素在三个测试灰阶的补偿值包括:根据公式C1=Lb’/Ls’计算所述像素在测试灰阶x’的亮度比系数C1,其中Lb’为像素在测试灰阶x’的标准亮度,Ls’为像素在测试灰阶x’的实际亮度;根据公式C2=C1*(x’/X) gamma计算像素在测试灰阶x’的灰阶比例系数C2,其中X为最大灰阶,gamma为当前伽马值;根据公式y’=X*C2 (1/gamma)计算像素在测试灰阶x’的补偿值y’。
- 根据权利要求1所述的确定像素补偿值的方法,其中,在所述根据公式y=(x*Gain1 2+x*Gain2+Offset)*Ratio+x计算像素在灰阶x的补偿值y前,还包括:根据像素在多个节点灰阶预设的调整系数,通过插值法计算像素在其它每个灰阶的调整系数。
- 根据权利要求4所述的确定像素补偿值的方法,其中,所述节点灰阶的数量大于3,且在所有灰阶中均匀分布。
- 根据权利要求4所述的确定像素补偿值的方法,其中,在所述根据公式y=(x*Gain1 2+x*Gain2+Offset)*Ratio+x计算像素在灰阶x的补偿值y后,还包括:分别使像素在多个复测灰阶按照相应的补偿值进行显示,并获得所述像素在每个复测灰阶的实际亮度;判断所述像素在多个复测灰阶的实际亮度和标准亮度的差距是否符合预设标准;若不符合,则改变像素在多个节点灰阶的调整系数,并返回所述根据像素在多个节点灰阶预设的调整系数,通过插值法计算像素在其它每个灰阶的调整系数的步骤。
- 一种确定像素补偿值的装置,包括:测试电路,用于使像素分别在三个测试灰阶进行显示,并分别获得所述像素在各测试灰阶的实际亮度;第一补偿值计算电路,用于根据所述像素在三个测试灰阶的实际亮度和标准亮度,分别计算出所述像素在三个测试灰阶的补偿值,所述像素在任意灰阶的补偿值为能使像素的实际亮度等于该灰阶的标准亮度的灰阶;标准系数计算电路,用于根据公式y’=x’*Gain1 2+x’*Gain2+Offset计算出标准系数Gain1、Gain2、Offset,其中x’为测试灰阶,y’为像素在测试灰阶x’的补偿值;第二补偿值计算电路,用于根据公式y=(x*Gain1 2+x*Gain2+Offset)*Ratio+x计算像素在灰阶x的补偿值y,其中Ratio为对应灰阶x的调整系数。
- 根据权利要求7所述的确定像素补偿值的装置,其中,所述第一补偿值计算电路配置用于:根据公式C1=Lb’/Ls’计算所述像素在测试灰阶x’的亮度比系数C1,其中Lb’为像素在测试灰阶x’的标准亮度,Ls’为像素在测试灰阶x’的实际亮度;根据公式C2=C1*(x’/X) gamma计算所述像素在测试灰阶x’的灰阶比例系数C2,其中X为最大灰阶,gamma为当前伽马值;根据公式y’=X*C2 (1/gamma)计算像素在测试灰阶x’的补偿值y’。
- 根据权利要求7所述的确定像素补偿值的装置,还包括:调整系数计算电路,用于根据所述像素在多个节点灰阶预设的调整系数,通过插值法计算所述像素在其它每个灰阶的调整系数。
- 根据权利要求9所述的确定像素补偿值的装置,还包括复测电路,其配置用于:分别使所述像素在多个复测灰阶按照相应的补偿值进行显示,并获得所述像素在每个复测灰阶的实际亮度;判断所述像素在多个复测灰阶的实际亮度和标准亮度的差距是否符合预设标准;若不符合,则改变所述像素在多个节点灰阶的调整系数。
- 一种电子设备,包括:一个或多个处理器;存储器,用于存储一个或多个程序,当所述一个或多个程序 被所述一个或多个处理器执行时,能使得所述一个或多个处理器实现根据权利要求1至6中任意一项所述的确定像素补偿值的方法。
- 一种计算机可读存储介质,其上存储有计算机程序,其中,所述计算机程序被处理器执行时能实现根据权利要求1至6中任意一项所述的确定像素补偿值的方法。
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