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 PDF

Info

Publication number
WO2020233595A1
WO2020233595A1 PCT/CN2020/091281 CN2020091281W WO2020233595A1 WO 2020233595 A1 WO2020233595 A1 WO 2020233595A1 CN 2020091281 W CN2020091281 W CN 2020091281W WO 2020233595 A1 WO2020233595 A1 WO 2020233595A1
Authority
WO
WIPO (PCT)
Prior art keywords
pixel
compensation value
test
gray scale
gray
Prior art date
Application number
PCT/CN2020/091281
Other languages
English (en)
French (fr)
Inventor
杨凯
赖政德
李孙寸
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/292,813 priority Critical patent/US20220005393A1/en
Publication of WO2020233595A1 publication Critical patent/WO2020233595A1/zh

Links

Images

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001Control 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
    • G09G3/003Control 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
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3433Control 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
    • G09G3/344Control 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 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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 liquid crystals
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0233Improving the luminance or brightness uniformity across the screen
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0271Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/029Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0673Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12Test circuits or failure detection circuits included in a display system, as permanent part thereof
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/16Calculation or use of calculated indices related to luminance levels in display data

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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

公开了一种确定像素补偿值的方法和装置、电子设备和存储介质。该方法属于显示技术领域,其可至少部分地解决现有的确定补偿值的方法计算得到的补偿值不合理的问题。该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;根据特定公式计算出标准系数Gain1、Gain2、Offset;根据特定公式计算像素在灰阶x的补偿值y。

Description

确定像素补偿值的方法和装置、电子设备、存储介质
相关申请的交叉引用
本申请要求于2019年5月22日在中国知识产权局提交的申请号为201910430807.1的中国专利申请的优先权,该中国专利申请的全部内容通过引用合并于此。
技术领域
本公开属于显示技术领域,具体涉及确定像素补偿值的方法和装置、电子设备、存储介质。
背景技术
由于制备工艺波动等原因,显示面板不同像素(或称子像素)的性质等并不完全相同。因此,在同样灰阶(同样数据电压)下,不同像素的实际显示亮度不同,从而引起亮度不均(Mura不良)。
发明内容
本公开的一个方面提供一种确定像素补偿值的方法,其包括:
使像素分别在三个测试灰阶进行显示,并分别获得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。
在一些实施例中,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。
在一些实施例中,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’。
在一些实施例中,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。
在一些实施例中,所述节点灰阶的数量大于3,且在所有灰阶中均匀分布。
在一些实施例中,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。
本公开的一个方面提供一种确定像素补偿值的装置,其包括:
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,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。
在一些实施例中,所述第一补偿值计算电路具体用于:
根据公式C1=Lb/Ls’计算像素在测试灰阶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’。
在一些实施例中,所述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。
在一些实施例中,所述确定像素补偿值的装置还包括复测电路,其用于:
分别使像素在多个复测灰阶按照相应的补偿值进行显示,并获得像素在每个复测灰阶的实际亮度;
判断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。
本公开的一个方面提供一种电子设备,其包括:
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上述任意一种确定像素补偿值的方法。
本公开的一个方面提供一种计算机可读存储介质,其上存储有计算机程序,
所述计算机程序被处理器执行时能实现上述任意一种确定像素补偿值的方法。
附图说明
图1为本公开一个实施例的确定像素补偿值的方法的流程图;
图2为本公开一个实施例的确定像素补偿值的装置的组成框图;
图3为本公开一个实施例的显示装置的组成框图。
具体实施方式
为使本领域技术人员更好地理解本公开的技术方案,下面结合附图和具体实施方式对本公开作进一步详细描述。
可以理解的是,此处描述的具体实施例和附图仅仅用于解释本公开,而非对本公开的限定。
可以理解的是,在不冲突的情况下,本公开中的各实施例及实施例中的各特征可相互组合。
可以理解的是,为便于描述,本公开的附图中仅示出了与本公开相关的部分,而与本公开无关的部分未在附图中示出。
可以理解的是,本公开的实施例中所涉及的每个电路、器件可仅对应一个实体结构,也可由多个实体结构组成,或者,多个电路、器件也可集成为一个实体结构。
可以理解的是,在不冲突的情况下,本公开的流程图和框图中所标注的功能、步骤可按照不同于附图中所标注的顺序发生。
可以理解的是,本公开的流程图和框图中,示出了按照本公开各实施例的***、装置、设备、方法的可能实现的体系架构、功能和操作。其中,流程图或框图中的每个方框可代表一个电路、器件、程序段、代码,其包含用于实现规定的功能的可执行指令。而且,框图和流程图中的每个方框或方框的组合,可用实现规定的功能的基于硬件的***实现,也可用硬件与计算机指令的组合来实现。
可以理解的是,本公开实施例中所涉及的电路、器件可通过软件的方式实现,也可通过硬件的方式来实现,例如电路、器件可位于处理器中。
相关技术中解决Mura不良的方式(De-Mura)可包括:出厂前使显示面板在某灰阶进行显示,并用CCD(电荷耦合器件)摄像头采集各像素的实际亮度,找出实际亮度与标准亮度(即像素在该灰阶理论上应有的亮度)存在差别的像素为存在Mura的像素,并根据以上差别为存在Mura的像素设定补偿值;当存在Mura的像素要在该灰阶(如100灰阶)显示时,其实际按照补偿值(如105灰阶)显示,以使实际亮度(105灰阶的实际亮度)等于标准亮度(100灰阶理论上应有的亮度)。
基于时间限制,一般不能在每个灰阶都按照以上方式直接测出补偿值,而只能选取2、3个特定灰阶作为测试灰阶,并测出这些测试灰阶的补偿值,而其它灰阶的补偿值则根据该测试灰阶的补偿值进行计算。但是,现有计算方式得出的补偿值并不准确,故像素在其它灰阶按照补偿值显示时实际亮度与标准亮度仍可能相差较大,无法有效消除Mura不良。
参照图1,本公开的一个实施例提供了一种确定像素补偿值的方法。
本实施例的方法用于确定像素(或称子像素)在各灰阶的补 偿值,以使像素在要显示某灰阶A时能够实际按照灰阶A的补偿值(如灰阶B)进行显示,进而保证像素的实际亮度等于标准亮度(即像素在灰阶A理论上应有的亮度),从而消除Mura不良。
当然,显示面板中实际包括很多像素,其中各像素的补偿值都可按照本实施例的方法分别确定,但本实施例中仅以为一个像素确定补偿值的过程为例进行说明。
具体的,本实施例的确定像素补偿值的方法包括步骤S01至S07。
在步骤S01,使像素分别以三个测试灰阶进行显示,并分别获得该像素在各测试灰阶的实际亮度。
也就是说,使该像素分别在三个预先设定的测试灰阶进行显示,并在显示时通过CCD摄像头等采集该像素的图像,以分别得出像素三个测试灰的实际亮度。
其中,测试灰阶的选取并无特殊规定,可根据经验进行选取,但通常而言,三个测试灰阶在全部灰阶中应当是相对均匀分布的,例如对于具有256个灰阶(即0~255灰阶)的显示面板,其选取的三个测试灰阶可为32灰阶、96灰阶、192灰阶。
当然,由于显示面板中实际包括很多像素,故本步骤实际可为让显示面板在测试灰阶进行显示,并采集显示面板的图像,进而分析出其中每个像素的实际亮度。
在步骤S02,根据该像素在三个测试灰阶的实际亮度和标准亮度,分别计算出该像素在三个测试灰阶的补偿值。在该实施例中,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。
像素在某灰阶的标准亮度是指:该像素在相应灰阶理论上应有的亮度。因此,若像素在某测试灰阶的实际亮度与标准亮度不同(或者说差距超过阈值),则表明其为存在Mura不良的像素,故需要根据其实际亮度与标准亮度之间的差距,计算出该像素在 该测试灰阶的补偿值。而像素在某灰阶的补偿值是指:当该像素要在相应灰阶显示时,其实际应按照补偿值的灰阶进行显示,才能使其实际亮度等于相应灰阶的标准亮度。
当然,由于测试灰阶有三个,故对每个像素来说,也会在每个测试灰阶分别算出一个相应的补偿值,即计算出的补偿值也有三个。
当然,若某像素在三个测试灰阶的实际亮度均与相应的标准亮度相同(或者说差距小于阈值),则可认为该像素不存在Mura不良,可不为其设置补偿值,也就是不必进行后续运算;或者,也可认为不存在Mura不良的像素在任意灰阶的补偿值都直接等于相应的灰阶。
在一些实施例中,像素在任意灰阶的标准亮度Lb可通过公式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。
也就是说,可利用像素理论上能达到的最大亮度(如在255灰阶的亮度)与当前显示面板采用的伽马值,用以上公式根据gamma曲线计算出像素在各灰阶(如测试灰阶)应有的亮度(即标准亮度)。
当然,若像素在各灰阶的标准亮度是已经预先设定好的,也是可行的。
具体的,本步骤(S02)可包括步骤S021至S023。
在步骤S021,根据公式C1=Lb’/Ls’计算像素在测试灰阶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。
具体的,根据以上公式计算出像素在测试灰阶应有的标准亮度与实际亮度的比值。例如,假设像素在32灰阶的标准亮度为3.1nit,实际亮度为2nit,则C1=3.1/2=1.55
在步骤S022,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。
按照以上公式并且根据亮度比系数C1计算像素在各测试灰阶的灰阶比例系数C2。例如,若显示面板当前采用的伽马值为2.2,最大灰阶为255,则以上像素在32灰阶(测试灰阶)的灰阶比例系数C2=1.55*(32/255) 2.2=0.01612。
在步骤S023,根据公式y’=X*C2 (1/gamma)计算像素在测试灰阶x’的补偿值y’。
根据以上C2,继续按照以上公式计算在测试灰阶的补偿值。例如对以上像素,其在32灰阶的补偿值y’=255*0.01612 (1/2.2)=39;也就是说,对该像素,当其要显示32灰阶时,实际应向其提供对应39灰阶的数据电压,从而在该数据电压下,该像素实际亮度等于32灰阶的标准亮度3.1nit。
在步骤S03,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。
如前,由于测试灰阶有三个,故相应的测试灰阶x’和补偿值y’也有三组。因此,按照以上公式可形成三个方程,该三个方程可组成一个方程序,因方程组中的未知数个数(Gain1、Gain2、Offset)和方程个数均为三个,故以上标准系数Gain1、Gain2、Offset必然是可求出的。
在步骤S04,在一些实施例中,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。
也就是说,针对部分特定的灰阶(节点灰阶),为其设置调整系数,之后根据这些调整系数,计算其它各灰阶的调整系数,最终使每个灰阶都具有一个对应的调整系数Ratio。
在一些实施例中,节点灰阶的数量大于3,且在所有灰阶中均匀分布。
也就是说,节点灰阶的数量应当比测试灰阶更多,以提高补偿值计算的精确性;且节点灰阶在所有灰阶中的分布应当是相对 均匀的,即不同的各组相邻节点灰阶之间间隔的灰阶数的差别应尽量小。例如,若灰阶总数为256(即0~255灰阶),而节点灰阶的总数为17,则节点灰阶可为0灰阶、16灰阶、32灰阶、48灰阶、64灰阶、80灰阶、96灰阶、112灰阶、128灰阶、144灰阶、160灰阶、176灰阶、192灰阶、208灰阶、224灰阶、240灰阶、255灰阶;其中,除240灰阶与255灰阶之间间隔的灰阶数为14个之外,其它任意相邻节点灰阶之间间隔的灰阶数均为15个。
插值法是指两个相邻节点灰阶以及二者间的其它灰阶的调整系数是线性分布的。例如,若以上0灰阶的调整系数为Ratio_0,16灰阶的调整系数为Ratio_16,则:
1灰阶的调整系数Ratio_1=Ratio_0+(Ratio_16-Ratio_0)*1/16;
2灰阶的调整系数Ratio_2=Ratio_0+(Ratio_16-Ratio_0)*2/16;
3灰阶的调整系数Ratio_3=Ratio_0+(Ratio_16-Ratio_0)*3/16;
……以此类推;
15灰阶的调整系数Ratio_15=Ratio_0+(Ratio_16-Ratio_0)*15/16。
当然,其它节点灰阶间的其它灰阶的调整系数也可按照以上方式确定,在此不再详细描述。
当然,如果是直接为所有的灰阶都设定调整系数,也是可行的,故本步骤(S04)是可选的。
当然,以上调整系数的设置应当保证,对于三个测试灰阶,按照后续S05步骤计算得到的补偿值与以上步骤S02中计算得到的补偿值是相同的,即至少部分调整系数是根据测试灰阶的已知的补偿值设定的。
根据以上方式,只要为部分节点灰阶设置调整系数,即可算出针对每个灰阶的调整系数,进而得到针对每个灰阶的补偿值,其一方面所需的存储量、运算量较小,容易实现;另一方面,又 可根据实际情况灵活的设定调整系数,以比较准确的得到针对每个灰阶的补偿值,实现较好的显示效果。
在步骤S05,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。
在得到针对每个灰阶的调整系数Ratio后(或者针对每个灰阶的调整系数Ratio是直接预设的),即根据以上公式计算对应任意灰阶x的补偿值y。
根据本实施例的确定像素补偿值的方法,可通过特定的运算得到像素在任意灰阶的补偿值,且该补偿值的计算方法与现有方式不同,更加合理,从而得到的补偿值也更加精准,根据该补偿值进行显示时可得到更好的显示效果,消除Mura不良。
在步骤S06,在一些实施例中,分别使像素在多个复测灰阶按照相应的补偿值进行显示,并获得像素在每个复测灰阶的实际亮度。
在得到像素在各灰阶的补偿值后,即让像素在部分特定的灰阶(复测灰阶)按照相应补偿值进行显示,并通过CCD摄像头等采集像素按照补偿值显示时的实际亮度。
在步骤S07,在一些实施例中,判断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。
若符合,则本方法结束。
若不符合,则改变像素在多个节点灰阶的调整系数,并返回以上S04步骤。
也就是说,根据像素在补偿值显示时的实际亮度,判断按照当前补偿值进行显示时的显示效果是否合格(如判断实际亮度与标准亮度的最大差距是否小于阈值)。
若合格,则表明当前确定的补偿值是合理的,因此可结束确 定像素补偿值的过程。
若不合格,则表明当前的补偿值并不合理,因此需要重新计算补偿值,但由于计算Gain1、Gain2、Offset的过程是标准的,故以上不合理通常由调整系数Ratio的值不合理导致。因此,当实际亮度和标准亮度的差距不符合预设标准时,可重新设定节点灰阶的调整系数,并返回以上S04步骤,根据重新设定的调整系数重新计算所有灰阶的调整系数,进而重新计算各灰阶的补偿值。
以上方法通过循环的方式不断调整以得到最合适的调整系数Ratio,进而可得到更合理的补偿值,可进一步提高对补偿值的准确度。
当然,如果可确保调整系数Ratio的值是合理的,则也可不进行以上对调整系数进行循环调整的步骤(即不进行S06步骤和S07步骤),故这些步骤是可选的。
例如,对一批次生产的显示面板,可仅在对第一块显示面板确定像素补偿值时进行以上S06步骤和S07步骤,以得到一组对应节点灰阶的调整系数;这样,在后续对该批次中其它显示面板确定像素补偿值时,则可直接采用相应的调整系数,而不进行以上S06步骤和S07步骤。
参照图2,本公开的一个实施例提供了一种确定像素补偿值的装置,其包括:
测试电路,用于使像素分别在三个测试灰阶进行显示,并分别获得该像素在各测试灰阶的实际亮度;
第一补偿值计算电路,用于根据该像素在三个测试灰阶的实际亮度和标准亮度,分别计算出该像素在三个测试灰阶的补偿值。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。
在一些实施例中,第一补偿值计算电路具体用于:
根据公式C1=Lb’/Ls’计算像素在测试灰阶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’。
在一些实施例中,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。
在一些实施例中,确定像素补偿值的装置还包括复测电路,其用于:
分别使像素在多个复测灰阶按照相应的补偿值进行显示,并获得像素在每个复测灰阶的实际亮度;
判断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。
本实施例的确定像素补偿值的装置可执行以上确定像素补偿值的方法,从而可得到更合理的补偿值,以改善显示面板的显示效果。
其中,以上确定像素补偿值的装置中的各电路可包括具有存储数据能力的存储介质(如硬盘)、具有执行软件程序的能力的处理器(如CPU)、具有实体物理功能的器件(如CCD摄像头)、具有对显示装置输出数据能力的器件(如烧录设备)等,在此不再详细描述。
参照图3,本公开的一个实施例提供了一种显示装置,其中存储有根据以上方法得到的补偿值,或具有能按照以上方式确定补偿值的计算电路。
在实际的显示装置中,可让显示面板按照以上的补偿值进行显示,以改善显示效果。
例如,显示装置的结构可参照图3,补偿值存储在Flash(闪存)器件中;Data_Align(数据排列)器件用于接收原始显示数据(即根据要显示的图像得出的各像素应有的灰阶),并确定针对各像素的灰阶,并将其发送至Compensation(补偿)器件;而SRAM(静态随机存取存储器)器件从Flash器件中读取补偿值,通过DE-COMPRESS(解压)器件解压后发给Compensation器件;Compensation器件据此得到每个像素实际应显示的灰阶,即生成补偿显示数据,发给显示面板供显示面板进行显示。
其中,以上Data_Align器件、Compensation器件、SRAM器件、DE-COMPRESS器件等可为分别独立的处理器,也可集成在一个芯片(IC)中。
在一些实施例中,在显示装置中实际可仅存储有以上调整系数Ratio和测试像素的补偿值y’,而像素实际显示时的补偿值由Compensation器件在每次显示时根据与以上公式计算得到。
具体的,该显示装置可为液晶显示装置(LCD)、有机发光二极管(OLED)显示装置、电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
本公开的一个实施例提供一种电子设备,其包括:
一个或多个处理器;
存储器,用于存储一个或多个程序,当一个或多个程序被一个或多个处理器执行时,能使得一个或多个处理器实现上述任意一项确定像素补偿值的方法。
本公开的一个实施例提供一种计算机可读介质,其上存储有计算机程序,当计算机程序被处理器执行时能实现上述任意一项确定像素补偿值的方法。
其中,计算机可读介质可以是本公开的装置、设备、***中所包含的,也可以是单独存在。
其中,计算机可读存储介质可是任何包含或存储程序的有形介质,其可以是电、磁、光、电磁、红外线、半导体的***、装置、设备,更具体的例子包括但不限于:具有一个或多个导线的电连接、便携式计算机磁盘、硬盘、光纤、随机访问存储器(RAM)、只读存储器(ROM)、可擦式可编程只读存储器(EPROM或闪存)、便携式紧凑磁盘只读存储器(CD-ROM)、光存储器件、磁存储器件,或它们任意合适的组合。
其中,计算机可读存储介质也可包括在基带中或作为载波一部分传播的数据信号,其中承载了计算机可读的程序代码,其具体的例子包括但不限于电磁信号、光信号,或它们任意合适的组合。
可以理解的是,以上实施方式仅仅是为了说明本公开的原理而采用的示例性实施方式,然而本公开并不局限于此。对于本领域内的普通技术人员而言,在不脱离本公开的精神和实质的情况下,可以做出各种变型和改进,这些变型和改进也视为本公开的保护范围。

Claims (12)

  1. 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。
  2. 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。
  3. 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’。
  4. 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。
  5. 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。
  6. 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。
  7. 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。
  8. 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’。
  9. 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。
  10. 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。
  11. 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。
  12. 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。
PCT/CN2020/091281 2019-05-22 2020-05-20 确定像素补偿值的方法和装置、电子设备、存储介质 WO2020233595A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/292,813 US20220005393A1 (en) 2019-05-22 2020-05-20 Method and device for determining pixel compensation value, electronic device and storage medium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910430807.1A CN110148388B (zh) 2019-05-22 2019-05-22 确定像素补偿值的方法和装置、电子设备、存储介质
CN201910430807.1 2019-05-22

Publications (1)

Publication Number Publication Date
WO2020233595A1 true WO2020233595A1 (zh) 2020-11-26

Family

ID=67592813

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/091281 WO2020233595A1 (zh) 2019-05-22 2020-05-20 确定像素补偿值的方法和装置、电子设备、存储介质

Country Status (3)

Country Link
US (1) US20220005393A1 (zh)
CN (1) CN110148388B (zh)
WO (1) WO2020233595A1 (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110148388B (zh) * 2019-05-22 2021-07-30 京东方科技集团股份有限公司 确定像素补偿值的方法和装置、电子设备、存储介质
CN111276089B (zh) * 2020-04-13 2022-09-13 昆山国显光电有限公司 一种灰阶补偿计算方法、装置和显示装置
CN112614458A (zh) * 2020-05-28 2021-04-06 西安诺瓦星云科技股份有限公司 显示模块校正方法、装置及***和校正***
CN113870811B (zh) * 2020-06-30 2022-12-30 武汉天马微电子有限公司 显示装置及其亮度调节方法、装置、电子设备及存储介质
CN114093292B (zh) * 2020-07-29 2024-06-28 昆山工研院新型平板显示技术中心有限公司 亮度参数校正方法、装置、设备及亮度补偿***
CN112700746B (zh) * 2020-12-31 2022-10-04 深圳Tcl数字技术有限公司 显示设备的亮度调节方法、终端设备及存储介质
CN113140186B (zh) * 2021-04-22 2022-11-01 武汉华星光电半导体显示技术有限公司 显示面板的补偿方法及显示装置
CN113270062A (zh) * 2021-05-21 2021-08-17 武汉华星光电半导体显示技术有限公司 一种显示面板的补偿方法
CN113763878B (zh) * 2021-09-10 2022-08-12 京东方科技集团股份有限公司 显示屏的显示补偿方法、补偿装置及显示装置
CN115547220B (zh) * 2022-03-23 2023-07-07 荣耀终端有限公司 图像显示方法和电子设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000172218A (ja) * 1998-12-03 2000-06-23 Matsushita Electric Ind Co Ltd 液晶表示装置
US6919905B2 (en) * 2001-09-28 2005-07-19 Hewlett-Packard Development Company, L.P. Method and device for visual calibration of displays
CN104021759A (zh) * 2014-05-30 2014-09-03 京东方科技集团股份有限公司 一种显示器件的亮度补偿方法、亮度补偿装置及显示器件
CN108694906A (zh) * 2018-08-01 2018-10-23 京东方科技集团股份有限公司 一种显示面板的亮度调整方法及计算机可读介质
CN110148388A (zh) * 2019-05-22 2019-08-20 京东方科技集团股份有限公司 确定像素补偿值的方法和装置、电子设备、存储介质

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10878747B1 (en) * 2018-07-12 2020-12-29 Apple Inc. Optical uniformity compensation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000172218A (ja) * 1998-12-03 2000-06-23 Matsushita Electric Ind Co Ltd 液晶表示装置
US6919905B2 (en) * 2001-09-28 2005-07-19 Hewlett-Packard Development Company, L.P. Method and device for visual calibration of displays
CN104021759A (zh) * 2014-05-30 2014-09-03 京东方科技集团股份有限公司 一种显示器件的亮度补偿方法、亮度补偿装置及显示器件
CN108694906A (zh) * 2018-08-01 2018-10-23 京东方科技集团股份有限公司 一种显示面板的亮度调整方法及计算机可读介质
CN110148388A (zh) * 2019-05-22 2019-08-20 京东方科技集团股份有限公司 确定像素补偿值的方法和装置、电子设备、存储介质

Also Published As

Publication number Publication date
US20220005393A1 (en) 2022-01-06
CN110148388A (zh) 2019-08-20
CN110148388B (zh) 2021-07-30

Similar Documents

Publication Publication Date Title
WO2020233595A1 (zh) 确定像素补偿值的方法和装置、电子设备、存储介质
US10395587B2 (en) Method and apparatus for establishing luminance compensation model, method and apparatus for compensating for luminance of display screen, and display device
WO2019001354A1 (zh) 一种显示面板的灰阶调整方法及装置
WO2017140003A1 (zh) 校准oled显示面板亮度不均的方法
US20210049977A1 (en) Pixel rendering method, image rendering method, rendering apparatus, and display apparatus
WO2019090794A1 (zh) Gamma校正***及其校正方法
TWI413101B (zh) 增進亮度一致性的控制方法及相關亮度校正控制器與顯示裝置
WO2018090597A1 (zh) 逐点校正方法
CN108376532B (zh) 一种显示装置的亮度补偿方法及装置
WO2020125417A1 (zh) 确定显示面板中像素老化程度的方法、装置、设备以及补偿像素的显示亮度的方法、装置、设备
BR102014022192A2 (pt) método e aparelho associado para corrigir artefato de cor de imagem
WO2019041842A1 (zh) 一种图像处理方法及装置、存储介质和计算机设备
CN105103539A (zh) 补正数据生成方法、补正数据生成***以及使用它们的画质调整技术
JP2017538148A (ja) 液晶パネル及びその画素単位の設定方法
US9583071B2 (en) Calibration apparatus and calibration method
US20160198066A1 (en) Image calibration method and device
US20190158823A1 (en) Measurement method for measuring display panel and apparatus thereof
CN111028779A (zh) 显示面板的补偿方法、装置以及显示面板
US20170193958A1 (en) Drive circuit and method for improving display effect of lcd, and liquid crystal display device
CN114283745A (zh) 显示面板的亮度补偿方法及相关装置
CN113781958A (zh) 显示面板的光学补偿方法及装置
KR20160031597A (ko) 표시 장치의 검사 방법 및 이에 의해 검사되는 표시 장치
CN114222101B (zh) 一种白平衡调节方法、装置及电子设备
US20240062696A1 (en) Demura method for display panel
CN111276092B (zh) 一种优化参数确定方法及装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20810188

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20810188

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 20810188

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 25.07.2022)

122 Ep: pct application non-entry in european phase

Ref document number: 20810188

Country of ref document: EP

Kind code of ref document: A1