WO2020211543A1 - 显示调试方法、补偿方法及装置、显示装置和存储介质 - Google Patents

显示调试方法、补偿方法及装置、显示装置和存储介质 Download PDF

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WO2020211543A1
WO2020211543A1 PCT/CN2020/076978 CN2020076978W WO2020211543A1 WO 2020211543 A1 WO2020211543 A1 WO 2020211543A1 CN 2020076978 W CN2020076978 W CN 2020076978W WO 2020211543 A1 WO2020211543 A1 WO 2020211543A1
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display
data
pixel unit
grayscale
debugging
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PCT/CN2020/076978
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English (en)
French (fr)
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李孙寸
赖政德
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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
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Publication of WO2020211543A1 publication Critical patent/WO2020211543A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • 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
    • G09G3/22—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
    • 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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • 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
    • G09G3/22—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
    • 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]
    • G09G3/3216—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] using a passive matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • 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
    • 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
    • G09G3/36—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 liquid crystals
    • G09G3/3607—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 liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping

Definitions

  • the embodiments of the present disclosure relate to a display debugging method of a pixel unit, a compensation method of a pixel unit, a compensation parameter acquisition method of a pixel unit, a display debugging method of a display panel, a display debugging device of a display panel, a display compensation device, a display device, and Storage medium.
  • the current mainstream flat panel display devices include liquid crystal display devices (Liquid Crystal Display, LCD) and organic light emitting diode display devices (Organic Light Emitting Display, OLED).
  • LCD Liquid Crystal Display
  • OLED Organic Light Emitting Display
  • Organic Light Emitting Diode (OLED) display devices have the characteristics of wide viewing angle, high contrast, fast response speed, high brightness, high luminous efficiency, small thickness, flexibility, wide operating temperature range, self-luminous and so on. Due to the above-mentioned characteristics and advantages, organic light-emitting diode (OLED) display devices have gradually received widespread attention and can be applied to devices with display functions such as mobile phones, display devices, notebook computers, digital cameras, and instrumentation.
  • At least one embodiment of the present disclosure provides a display debugging method of a pixel unit.
  • the display debugging method of the pixel unit includes: selecting a debugging gray scale vector.
  • the debugging gray scale vector includes N+1 debugging Grayscale data; obtain respectively N+1 brightness data of the pixel unit when displaying the N+1 debug grayscale data; obtain the N-level compensation relationship of the pixel unit based on the N+1 brightness data
  • the N-order compensation relationship includes N+1 parameters, and N is an integer greater than or equal to 2.
  • the pixel unit has a display deviation.
  • the N+1 brightness data are acquired by an optical method.
  • obtaining the N-order compensation relational expression of the pixel unit based on the N+1 brightness data includes: obtaining N+1 brightness data respectively based on the N+1 brightness data. Equivalent gray-scale data; obtaining N+1 corrected gray-scale data based on the N+1 luminance data and the N+1 debugging gray-scale data; and based on the N+1 equivalent gray-scale data; The grayscale data and the N+1 corrected grayscale data determine the values of the N+1 parameters, thereby determining the N-level compensation relationship.
  • the N is equal to 2
  • the N-order compensation relationship is the following expression (1):
  • parameters a, b, and c are the N+1 parameters; the N-order compensation relationship is determined based on the N+1 equivalent gray-scale data and the N+1 corrected gray-scale data Including: in the expression (1), x is equal to the N+1 equivalent gray-scale data, and y is equal to the N+1 corrected gray-scale data, thereby obtaining N+1 Equations; and the parameter a, the parameter b, and the parameter c are determined based on the N+1 equations.
  • respectively acquiring the N+1 corrected grayscale data based on the N+1 brightness data and the N+1 debugging grayscale data includes: Obtain N+1 theoretical brightness data based on the N+1 debugging grayscale data; determine N+1 scale factor data based on the N+1 brightness data and the N+1 theoretical brightness data; and The N+1 scale factor data and the N+1 debugging grayscale data acquire the N+1 corrected grayscale data.
  • the N+1 theoretical brightness data, the N+1 scale factor data, the N+1 corrected grayscale data, and N+1 Two equivalent gray-scale data are obtained using the following expressions (2)-(5):
  • Lum_theo is one of the N+1 theoretical brightness data
  • Ra is one of the N+1 scale coefficient data
  • G_corre is one of the N+1 corrected grayscale data
  • G_eff is One of the N+1 equivalent gray-scale data
  • g is one of the N+1 debugging gray-scale data
  • Lum_test is one of the N+1 brightness data
  • ⁇ is a constant between 2-2.4
  • G_max is the maximum gray scale that the pixel unit can display
  • Lum_max is the brightness of the pixel unit under the maximum gray scale.
  • selecting the debugging grayscale vector includes: dividing the grayscale range that the pixel unit can display into N+1 grayscale regions from small to large; and A grayscale value is selected from each of the grayscale regions to form the debugging grayscale vector.
  • the range of the N+1 gray scale regions gradually increases.
  • At least one embodiment of the present disclosure also provides a display debugging method of a display panel, the display panel including a plurality of pixel units, and the display debugging method of the display panel includes: determining that there is at least display deviation in the display panel One pixel unit; for each of the at least one pixel unit with display deviation, the display debugging method of the pixel unit provided by at least one embodiment of the present disclosure is applied to each of the at least one pixel unit with display deviation Obtain the N-order compensation relationship.
  • At least one embodiment of the present disclosure further provides a compensation method for a pixel unit.
  • the compensation method for the pixel unit includes: acquiring a data signal to be displayed of the pixel unit; and using the pixel unit provided based on any embodiment of the present disclosure
  • the N-order compensation relational expression obtained by the display debugging method compensates the data signal to be displayed to obtain the compensated data signal; and provides the compensated data signal to the pixel unit, so that Using the compensated data signal to drive the pixel unit for display.
  • At least one embodiment of the present disclosure provides a method for obtaining compensation parameters of a pixel unit.
  • the method for obtaining compensation parameters of a pixel unit includes: selecting a test grayscale vector, wherein the test grayscale vector includes N+1 Test grayscale data; obtain an N-order compensation relationship based on the test grayscale vector; correct the grayscale of the pixel unit based on the N-order compensation relationship, and evaluate the correction effect; when the correction effect satisfies the correction When required, the test grayscale vector is used as a debugging grayscale vector, and when the correction effect does not meet the correction requirement, the test grayscale vector is adjusted until the N-order compensation relationship is correct The correction effect of the gray scale correction of the pixel unit meets the correction requirement.
  • selecting the debugging grayscale vector includes: dividing the grayscale range that the pixel unit can display into N+1 grayscale regions from small to large; and Each of the gray-scale regions selects a gray-scale value to form the debugging gray-scale vector.
  • At least one embodiment of the present disclosure further provides a display debugging device of a display panel, including a processor and a memory.
  • Computer program instructions are stored in the memory, and when the computer program instructions are executed by the processor, the following steps are executed: determine the pixel units with display deviations in the display panel; for each of the pixel units with display deviations
  • a display debugging method for pixel units provided in any embodiment of the present disclosure is applied to obtain the N-order compensation relational expression for each of the pixel units with display deviation.
  • At least one embodiment of the present disclosure further provides a display compensation device, which is used to drive a display panel and includes a processor and a memory.
  • the memory stores computer program instructions and the N-order compensation relationship obtained based on the pixel unit display debugging method provided by any embodiment of the present disclosure.
  • the computer program instructions are executed by the processor, the following steps are executed : Obtain the to-be-displayed data signal of the pixel unit of the display panel with display deviation; use the N-order compensation relational expression to compensate the to-be-displayed data signal to obtain the compensated data signal;
  • the compensated data signal is provided to the pixel unit, so that the compensated data signal can be used to drive the pixel unit for display.
  • At least one embodiment of the present disclosure further provides a display device, which includes a display panel and the display compensation device provided in any embodiment of the present disclosure.
  • At least one embodiment of the present disclosure further provides a storage medium, which includes computer program instructions stored on the storage medium.
  • the computer program instructions When the computer program instructions are executed by the processor, the following steps are performed: selecting a debugging grayscale vector, in this step, the debugging grayscale vector includes N+1 debugging grayscale data; respectively acquiring the pixel unit in the display The N+1 luminance data when the N+1 gray-scale data is debugged; the N-order compensation relational expression of the pixel unit is obtained based on the N+1 luminance data, and the N-order compensation relational expression includes N+1 In this step, N is an integer greater than or equal to 2.
  • the pixel unit is a pixel unit of the display panel with display deviation.
  • Fig. 1 is a schematic diagram of an external optical compensation system according to an embodiment of the present disclosure
  • 2A is an exemplary flowchart of a display debugging method of a pixel unit provided by at least one embodiment of the present disclosure
  • 2B is an exemplary flowchart of a method for obtaining compensation parameters of a pixel unit provided by at least one embodiment of the present disclosure
  • FIG. 3 is another exemplary flowchart of a method for obtaining compensation parameters of a pixel unit provided by at least one embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of a display debugging method for a display panel provided by at least one embodiment of the present disclosure
  • FIG. 5 is an example of a display debugging method of a display panel provided by at least one embodiment of the present disclosure
  • FIG. 6 is an exemplary block diagram of a display debugging device of a display panel provided by at least one embodiment of the present disclosure
  • Fig. 7 is an exemplary block diagram of a storage medium provided by at least one embodiment of the present disclosure.
  • FIG. 8 is an exemplary block diagram of another storage medium provided by at least one embodiment of the present disclosure.
  • FIG. 9 is an exemplary flowchart of a compensation method for a pixel unit provided by at least one embodiment of the present disclosure.
  • FIG. 10 is an exemplary flowchart of a compensation method for a display panel provided by at least one embodiment of the present disclosure
  • FIG. 11 is an exemplary block diagram of a display compensation device provided by at least one embodiment of the present disclosure.
  • FIG. 12 is a schematic block diagram of a display device provided by at least one embodiment of the present disclosure.
  • Moire is, for example, a phenomenon of uneven brightness caused by display deviation (for example, brightness deviation) of the pixel unit of the display device.
  • Moire includes moire points (that is, moire caused by the brightness deviation of a single pixel unit) and moire blocks (also That is, moiré caused by the brightness deviation of a plurality of adjacent pixel units).
  • moire includes bright spots, dark spots, bright blocks, or dark blocks.
  • ripples in the display device the picture quality of the display device will correspondingly decrease, thereby reducing the user experience.
  • the inventor of the present disclosure has noticed in research that brightness uniformity and residual image are two main problems currently faced by OLED (organic light emitting diode) display panels.
  • OLED organic light emitting diode
  • the inventor of the present disclosure has noticed in research that when only internal compensation technology is used, the effects of improving brightness uniformity and suppression of afterimages are limited, and the compensation effect of the OLED display panel can be improved by, for example, external compensation technology. A specific description is given below.
  • LTPS TFT low-temperature polysilicon thin film transistors
  • oxide such as indium gallium zinc oxide (IGZO)
  • IGZO indium gallium zinc oxide
  • LTPS TFTs in different positions may have non-uniformities in electrical parameters such as threshold voltage and mobility. This non-uniformity will be converted into the current difference and brightness difference between the pixel units of the OLED display panel, and may be perceived by the human eye (ie, the Mura phenomenon).
  • the threshold voltage may drift when the oxide thin film transistors are continuously under pressure and high temperature . Since the gray levels corresponding to different image pixels of the display screen may be different, the threshold drift of each TFT of the display panel may be different, and the above-mentioned difference in the threshold drift may cause the actual displayed screen to be different from the preset value in the subsequent display period.
  • the display picture of ” is biased, and therefore causes the afterimage phenomenon, which is commonly referred to as afterimage.
  • LTPS TFTs and oxide thin film transistors have uniformity and/or stability issues; and, OLEDs have brightness that gradually decays as the lighting time increases Characteristics.
  • the internal compensation technology refers to a method of compensation using a compensation sub-circuit constructed by TFT inside the pixel.
  • the external compensation technology refers to a method of sensing the electrical or optical characteristics of the pixel through an external driving circuit or an external device, and then performing compensation for the data signal to be displayed.
  • the display panel is a high-resolution display panel (QHD (2560x1440) and above)
  • QHD 2560x1440
  • the yield rate and/or display quality of the display panel may be further improved through external compensation on the basis of internal compensation.
  • the external compensation technology (that is, Demura technology or ripple erasing technology) is a technology for eliminating or suppressing the ripples of the display device and improving the brightness uniformity of the display screen.
  • a ripple erasing method may include the following steps: firstly, make the display device display a certain grayscale picture (for example, 255 grayscale picture); secondly, use, for example, an industrial-grade camera CCD (Charge Coupled Device) to photograph the screen of the display device , To obtain the actual brightness of each pixel unit in the display device; then, based on the actual brightness of each pixel unit to obtain the ripple area and non-ripple area of the display device; then, through an iterative method, the grayscale voltage of the pixel unit in the ripple area Adjust and optimize to improve the brightness uniformity and/or display effect of the display panel.
  • CCD Charge Coupled Device
  • the gray-scale voltage of the pixel unit in the ripple area can be adjusted and optimized by the following steps: first, obtain the gamma value of each pixel unit in the ripple area based on the actual brightness of each pixel unit in the ripple area; then, obtain each The preset target brightness of the pixel unit; next, calculate the compensated gray scale that should be used to achieve the preset target brightness of the pixel unit; fourth, make the OLED display panel display the above-mentioned compensated gray scale (That is, the compensated gray scale is provided to the pixel unit located in the ripple area), and the CCD is used to obtain the actual brightness of each pixel unit in the display device after compensation, and determine whether the compensation effect is satisfied (whether the degree of ripple is less than the preset threshold ). In the case of determining that the compensation effect is satisfied, the calculation process is ended; in the case of not satisfying the compensation effect, the actual brightness of each pixel unit in the display device is used to repeat the above steps until the compensation effect is satisfied or the highest Number of iterations.
  • the above-mentioned ripple erasing method usually requires multiple iterations to obtain a gray scale that satisfies the compensation effect, but in some cases, even after multiple iterations, the gray scale that satisfies the compensation effect cannot be obtained. Therefore, the compensation time required for the above-mentioned moire erasing method is long and the compensation effect is limited.
  • the inventors of the present disclosure have also noticed that when the brightness of the pixel unit of the display panel is lower, the brightness deviation of the pixel unit changes more (that is, the greater the ripple change), which further The compensation time required by the moire erasing method is increased, and the compensation effect of the moire erasing method is further reduced.
  • Some embodiments of the present disclosure provide a display debugging method of a pixel unit, a compensation method of a pixel unit, a compensation parameter acquisition method of a pixel unit, a display debugging method of a display panel, a display debugging device of a display panel, a display compensation device, a display Device and storage medium.
  • the display debugging method of the pixel unit includes: selecting a debugging gray-scale vector.
  • the debugging gray-scale vector includes N+1 debugging gray-scale data; respectively obtaining the pixel unit when displaying N+1 debugging gray-scale data N+1 brightness data; obtain the N-order compensation relational expression of the pixel unit based on the N+1 luminance data.
  • the N-order compensation relational expression includes N+1 parameters, and N is an integer greater than or equal to 2.
  • the pixel unit and the display panel and the display panel including the pixel unit can be improved. Display the compensation effect of the device.
  • the time and the amount of calculation required to debug the pixel unit or the display panel can be reduced, thereby making The pixel unit or the display panel can be compensated by applying a second-order compensation relational expression or a compensation relational expression above the second-order.
  • the display compensation device, the display device, and the storage medium are described in a non-limiting manner. As described below, the different features in these specific examples can be combined with each other without conflicting each other, so as to obtain new examples. These new examples also All belong to the scope of protection of this disclosure.
  • the embodiments of the present disclosure relate to an optical compensation system, and an example of the optical compensation system is shown in FIG. 1.
  • the hardware environment and structure shown in FIG. 1 are only exemplary and not restrictive; the hardware environment may also have other components and structures as required, and may include, for example, an image processing integrator.
  • the optical compensation system involves the OLED display panel 201 to be tested and an optical compensation device 202.
  • the optical compensation device 202 includes a camera 2021, a data processing unit 2022 and a control unit 2023, a camera 2021, and data processing.
  • the signal transmission (connection) between the unit 2022 and the control unit 2023 is performed in a wired or wireless manner.
  • the OLED display panel may include a data decoding circuit, a timing controller (Tcon), a gate driving circuit, a data driving circuit, a storage device (such as a flash memory, etc.), etc.
  • the data decoding circuit receives the display input signal and decodes it to obtain the display data signal; the timing controller outputs the timing signal to control the synchronous operation of the gate drive circuit, the data drive circuit, etc., and can perform gamma processing on the display data signal.
  • the processed display data signal is input to the data driving circuit for display operation.
  • the timing controller when it performs gamma processing on the display data signal, it can also perform compensation processing at the same time, for example, read out the pre-stored pixel compensation parameters from the storage device, and use the pixel compensation parameters to further process the display data signal to obtain The compensated display data signal is output to the data driving circuit for display operation after the gamma processing and compensation processing are completed.
  • the display panel may also include an independent gamma processing circuit, which performs gamma processing and compensation processing on the display data signal under the control of the timing controller.
  • FIG. 2A is an exemplary flowchart of a display debugging method of a pixel unit provided by at least one embodiment of the present disclosure.
  • the pixel unit is, for example, any pixel unit in the display panel with display deviation (for example, brightness deviation), and the actual brightness presented by the pixel unit deviates from the theoretical brightness (or target brightness) of the pixel unit.
  • the pixel unit may Belongs to corrugated points or corrugated blocks.
  • the above-mentioned display panel may be an OLED display panel.
  • the display debugging method of the pixel unit includes the following steps S110 to S130.
  • Step S110 Select a debugging gray scale vector, where the debugging gray scale vector includes N+1 debugging gray scale data, and N is an integer greater than or equal to 2.
  • Step S120 Obtain respectively N+1 brightness data when the pixel unit displays N+1 debugging grayscale data.
  • Step S130 Obtain the N-order compensation relational expression of the pixel unit based on the N+1 brightness data.
  • step S110, step S120, and step S130 may be executed sequentially.
  • the display debugging method of the pixel unit can be used to debug each pixel unit with display deviation in the display panel before the display panel leaves the factory, and the N-order compensation relationship of each pixel unit can be obtained.
  • the N-order compensation relationship It can be saved in the display panel, so that after the display panel is shipped and delivered to the user, when the user uses the display panel to display an image, the user can provide the corresponding compensation based on the N-order compensation relationship obtained by the display debugging method using the pixel unit.
  • the display data of the pixel unit is corrected (for example, grayscale correction), thereby improving the brightness accuracy of the pixel unit, and improving the brightness uniformity and/or display effect of the display panel including the pixel unit.
  • the gray scale is a parameter used to reflect the brightness level of the display screen, that is, the brightness level (from the darkest brightness level to the brightest brightness level) of the display surface.
  • the gray scale can be determined by the number of bits of the gray scale data, and the gray scale can determine the fineness of the color of the display screen. For example, when the gray scale data is 6 bits, there are 64 gray scales; when the gray scale data is 8 bits, there are 256 gray scales; when the gray scale data is 10 bits, there are 1024 Grayscale.
  • the number of bits of the aforementioned debugging grayscale data can be set according to actual applications, so that the pixel unit and the display panel including the display unit can display a predetermined number of grayscales.
  • N an integer greater than or equal to 2
  • the compensation effect of the N-order compensation relationship obtained by the display debugging method based on the pixel unit on the pixel unit and the display panel including the pixel unit can be improved.
  • N may be equal to 2.
  • the calculation amount and the compensation effect of compensating the pixel unit and the display panel including the pixel unit can be balanced by applying the N-order compensation relationship.
  • the specific method for selecting and debugging the grayscale vector can be selected according to actual application requirements, which is not specifically limited in the embodiment of the present disclosure.
  • the debugging grayscale vector selected in the display debugging method of the pixel unit is the optimized debugging grayscale vector (for example, the optimal debugging grayscale vector); in this case, the In the display debugging method of the unit, the optimized debugging grayscale vector is used to reduce the time and the amount of calculation required to debug the pixel unit and the display panel including the pixel unit, thereby making it possible to apply the second-order compensation relationship or the compensation above the second-order The relational expression compensates the pixel unit and the display panel.
  • the optimized debugging grayscale vector for example, the optimal debugging grayscale vector
  • the compensation parameter acquisition method of the pixel unit may be used to determine the optimized debugging grayscale vector, and the debugging grayscale vector (for example, the optimized debugging grayscale vector) may be stored in the memory In this way, the debugging grayscale vector (for example, the optimized debugging grayscale vector) can be directly called in the display debugging method of the pixel unit.
  • the method of obtaining the optimized debugging grayscale vector will be described in detail in the following embodiment of the method for obtaining compensation parameters of the pixel unit, and will not be repeated here.
  • a plurality of display panels (a large number of display panels, for example, 100 display panels) can be tested, and the compensation parameter acquisition method of the pixel unit can be used to determine the debugging grayscale vector.
  • the use of the pixel unit The debugging grayscale vector determined by the compensation parameter acquisition method (that is, the debugging grayscale vector selected in the display debugging method of the execution pixel unit) is the optimized debugging grayscale vector (for example, the optimal debugging grayscale vector). Therefore, when the optimized debugging gray-scale vector is used to execute the display debugging method of the pixel unit, the N-order compensation relationship that meets the compensation requirement can be obtained faster, thereby reducing the cost of executing the display debugging method of the pixel unit. It takes time to improve the debugging efficiency of the pixel unit and the debugging efficiency of the display panel including the pixel unit.
  • the debugging grayscale vector selected in the display debugging method of executing the pixel unit may also be the initial debugging grayscale vector (that is, the unoptimized debugging grayscale vector); in this case, when executing After step S110 and before performing step S120, the display debugging method of the pixel unit may further include the following step S140.
  • Step S140 Obtain an optimized debug grayscale vector based on the initial debug grayscale vector, and execute step S120 and step S130 based on the optimized debug grayscale vector.
  • the compensation parameter acquisition method of the pixel unit can be used to obtain the optimized debugging gray-scale vector based on the initial debugging gray-scale vector (for example, as the test gray-scale vector in the method of acquiring the compensation parameter of the pixel unit), and the compensation parameter acquisition method of the pixel unit It will be described in detail in the embodiment of the method for obtaining compensation parameters of the pixel unit, and will not be repeated here.
  • selecting the adjustment grayscale vector may include the following steps S111 and S112.
  • step S111 and step S112 can be executed sequentially.
  • Step S111 Divide the gray scale range that the pixel unit can display into N+1 gray scale regions from small to large.
  • Step S112 Select a grayscale value from each grayscale area to form a debugging grayscale vector.
  • the pixel unit can display into N+1 grayscale areas from small to large, and selecting a grayscale value from each grayscale area to form a debug grayscale vector, you can execute the pixel unit In the compensation parameter acquisition method, the speed of optimizing and debugging the gray-scale vector is accelerated, so that an optimized debugging gray-scale vector can be obtained faster.
  • dividing the gray scale range that the pixel unit can display into N+1 gray scale regions from small to large includes: dividing the gray scale range that the pixel unit can display into N+1 gray scale regions, and make the mth gray scale
  • the largest grayscale value in the area is less than the smallest grayscale value in the m+1th grayscale area, and m is an integer greater than or equal to 1 and less than or equal to N.
  • N+1 gray scale regions from small to large refers to the gray scale values in the N+1 gray scale regions from small to large.
  • the grayscale range that the element unit can display can be divided into the first grayscale area, the second grayscale area, and the third grayscale area. All the grayscale values in the first grayscale area are All gray scale values in the second gray scale region are smaller than all gray scale values in the second gray scale region, and all gray scale values in the second gray scale region are smaller than all gray scale values in the third gray scale region.
  • the range of N+1 gray-scale areas gradually increases.
  • the range of the m+1th gray-scale area is larger than the range of the m-th gray-scale area.
  • the gray scale range that the pixel unit can display is 0-255 gray scale (here, 0 gray scale indicates the minimum brightness of the pixel unit, 255 gray scale indicates the maximum brightness of the pixel unit)
  • the first gray scale area is 0-31 gray scales
  • the gray scale range of the second gray scale area is 32-127 gray scales
  • the gray scale range of the third gray scale area is 128-255 gray scales.
  • the optimization speed of the debugging grayscale vector can be further improved, that is, an optimized debugging grayscale vector can be obtained faster, and the optimization can be used
  • the N-order compensation relation obtained by the subsequent adjustment gray-scale vector not only has a good compensation effect for moire under high brightness levels, but also has a good compensation effect for moire under low brightness levels.
  • the gray scale range of the first gray scale area is 0-31 gray scales
  • the gray scale range of the second gray scale area is 32-127 gray scales
  • the gray scale range of the third gray scale area is In the case of 128-255 gray scales
  • the debugging grayscale data obtained in step S112 can be directly used to execute step S120 and step S130.
  • the debugging grayscale data obtained in step S112 (for example, as a test grayscale vector in the method for obtaining compensation parameters of pixel units) may be used to obtain an optimized debugging grayscale vector, and then may be based on optimized debugging The grayscale vector executes step S120 and step S130.
  • N+1 pieces of brightness data can be acquired by an optical method.
  • the image acquisition device can be used to sequentially photograph the pixel units to obtain that the pixel unit is displaying the above N
  • N+1 brightness data of the pixel unit For example, in the case where the debug grayscale data displayed by the pixel unit is g1, the image acquisition device may capture the pixel unit and obtain the first image, and then the pixel unit may obtain the pixel based on the first image when the debug grayscale data g1 is displayed.
  • the brightness data of the unit Lum_test_1 based on a similar method, the brightness data Lum_test_2 of the pixel unit when the pixel unit is displaying the debugging grayscale data g2, and the brightness of the pixel unit when the pixel unit displays the debugging grayscale data g3 Data Lum_test_3.
  • the image acquisition device may have higher accuracy to improve the accuracy of the brightness data, reduce the time to obtain the N-order compensation relationship, and the compensation effect of the pixel unit and the display panel that use the N-order compensation relationship for compensation.
  • the image acquisition device may also have a higher resolution, so that the pixel unit display debugging method described above can be applied to a pixel unit of a small size or a pixel unit in a high-resolution display panel.
  • the image acquisition device may be an industrial-grade camera (or camera).
  • the image acquisition device can be implemented as a CCD (charge coupled device) type camera (or camera), a CMOS (complementary metal oxide semiconductor) type camera (or camera), or other applicable types of camera (or camera).
  • CCD charge coupled device
  • CMOS complementary metal oxide semiconductor
  • step S130 the N-order compensation relationship has an unknown number, N+1 parameters, and the highest degree of the unknown number term is N.
  • step S130 obtaining the N-order compensation relational expression of a pixel unit based on N+1 brightness data includes the following steps S131, S132, and S133.
  • Step S131 Obtain N+1 equivalent grayscale data respectively based on the N+1 brightness data.
  • Step S132 Obtain N+1 corrected grayscale data based on N+1 brightness data and N+1 debug grayscale data, respectively.
  • Step S133 Determine the value of the N+1 parameters based on the N+1 equivalent gray-scale data and the N+1 corrected gray-scale data, thereby determining the N-level compensation relationship.
  • step S131, step S132, and step S133 may be executed sequentially.
  • step S132, step S131, and step S133 may be executed in sequence.
  • step S131+step S132 that is, step S131+step S132
  • step S133 can be executed sequentially.
  • step S131 the following expressions can be used to obtain N+1 equivalent grayscale data based on N+1 brightness data:
  • ⁇ is the index of the relationship curve between grayscale and transmittance (ie, gamma value, which is a constant between 2-2.4);
  • Lum_test is one of N+1 brightness data, for example, Lum_test can be corresponding to the debug grayscale
  • the brightness data Lum_test_1 of the data g1 corresponds to the brightness data Lum_test_2 of the debug grayscale data g2 or the brightness data Lum_test_3 corresponding to the debug grayscale data g3;
  • G_eff is one of N+1 equivalent grayscale data, for example, G_eff is the corresponding
  • step S132 obtaining N+1 corrected grayscale data based on N+1 brightness data and N+1 debug grayscale data respectively includes the following steps S1321-step S1323.
  • Step S1321 Obtain N+1 theoretical brightness data based on N+1 debugging grayscale data.
  • Step S1322 Determine N+1 scale factor data based on N+1 pieces of brightness data and N+1 pieces of theoretical brightness data.
  • Step S1323 Obtain N+1 corrected grayscale data based on the N+1 scale coefficient data and the N+1 debug grayscale data.
  • step S1321, step S1322, and step S1323 may be executed sequentially.
  • step S1321 the following expression can be used to obtain N+1 theoretical brightness data based on N+1 debugging grayscale data:
  • g is one of N+1 debugging grayscale data.
  • the debugging grayscale data can be g1, g2, or g3;
  • G_max is the maximum grayscale that the pixel unit can display, for example, the grayscale that can be displayed in the pixel unit.
  • Lum_theo is one of N+1 theoretical brightness data, for example, Lum_theo can be the theoretical brightness data Lum_theo_1 corresponding to the debugging gray scale data g1, corresponding to the debugging gray
  • Lum_max is the brightness of the pixel unit at the maximum gray level that the pixel unit can display, for example, Lum_max can be the pixel unit at 255 gray level Brightness (for example, theoretical brightness).
  • N+1 scale factor data may be determined based on the following expression and based on N+1 brightness data and N+1 theoretical brightness data:
  • Ra is one of N+1 scale coefficient data.
  • Ra may be scale coefficient data Ra_1 obtained based on theoretical brightness data Lum_theo_1 and brightness data Lum_test_1, and scale coefficient data obtained based on theoretical brightness data Lum_theo_2 and brightness data Lum_test_2 Ra_2, or scale coefficient data Ra_3 obtained based on theoretical brightness data Lum_theo_3 and brightness data Lum_test_3.
  • step S1323 the following expression can be used to obtain N+1 corrected gray-scale data based on N+1 scale factor data and N+1 debug gray-scale data:
  • G_corre is one of the N+1 corrected grayscale data.
  • G_corre may be the corrected grayscale data G_corre_1 obtained based on the scale factor data Ra_1 and the debugging grayscale data g1, based on the scale factor data Ra_2 and The corrected gray scale data G_corre_2 obtained by the debugging gray scale data g2, or the corrected gray scale data G_corre_3 obtained based on the scale factor data Ra_3 and the debugging gray scale data g3.
  • the value of N+1 parameters can be determined based on N+1 equivalent grayscale data and N+1 corrected grayscale data (for example, N +1 parameter value), thereby determining the N-order compensation relationship.
  • N 2 as an example to illustrate the specific method of determining the value of N+1 parameters.
  • N-order compensation relationship is the following expression (1):
  • the parameters a, b, and c are N+1 parameters.
  • determining the N-level compensation relational expression based on N+1 equivalent gray-level data and N+1 corrected gray-level data includes the following steps S1331 and S1332.
  • step S1331 and step S1332 may be executed sequentially.
  • Step S1331 Make x in expression (1) equal to N+1 equivalent grayscale data, and make y in expression (1) equal to corresponding N+1 corrected grayscale data, by This results in N+1 equations.
  • Step S1332 Determine the values of N+1 parameters (that is, parameter a, parameter b, and parameter c) based on N+1 equations.
  • step S1331 the following three equations can be obtained, and these three equations form a ternary linear equation system with unknown numbers a, b, and c:
  • G_corre_1 a ⁇ (G_eff_1) 2 +b ⁇ G_eff_1+c
  • G_corre_2 a ⁇ (G_eff_2) 2 + b ⁇ G_eff_2+c.
  • G_corre_3 a ⁇ (G_eff_3) 2 +b ⁇ G_eff_3+c
  • the parameter a, the parameter b, and the parameter c can be determined by solving the above-mentioned ternary linear equations.
  • the aforementioned N-order compensation relational expression (including parameter a, parameter b, and parameter c) can be stored in a memory (for example, the memory of the display panel or display device including the pixel unit, such as flash memory), so that the pixel In the display of the unit, the aforementioned N-order compensation relationship can be used to compensate or correct the data signal to be displayed (for example, gray-scale correction) of the pixel unit to obtain the compensated data signal; then, the compensated data signal can be used
  • the data signal (or the corrected data signal) drives the pixel unit for display. Therefore, the brightness accuracy of the pixel unit to which the display debugging method of the pixel unit is applied can be improved, and the brightness uniformity and/or the display effect of the display panel to which the display debugging method of the pixel unit is applied can be improved.
  • At least one embodiment of the present disclosure also provides a method for obtaining compensation parameters of pixel units.
  • the compensation parameter acquisition method of the pixel unit can obtain the optimized debugging gray-scale vector by optimizing the test gray-scale vector.
  • FIG. 2B is an exemplary flowchart of a method for obtaining compensation parameters of a pixel unit provided by at least one embodiment of the present disclosure.
  • the method for acquiring compensation parameters of the pixel unit includes the following steps S210 to S240.
  • step S210, step S220, step S230, and step S240 may be executed sequentially.
  • Step S210 Select a test grayscale vector.
  • the test grayscale vector includes N+1 test grayscale data
  • selecting the test grayscale vector may include the following steps S211 and S212.
  • Step S211 divide the gray scale range that the pixel unit can display into N+1 gray scale regions from small to large.
  • Step S212 Select a grayscale value from each grayscale area to form a test grayscale vector.
  • the order vector can speed up the optimization speed of the test gray-scale vector, and can obtain the optimized debugging gray-scale vector faster.
  • the range of N+1 gray-scale regions gradually increases.
  • the gray scale range that the pixel unit can display is 0-255 gray scale (0 gray scale means the brightness of the pixel unit is the smallest, 255 gray scale means the brightness of the pixel unit is the largest)
  • the gray scale of the first gray scale area is 0-31 gray levels
  • the gray level range of the second gray level area is 32-127 gray levels
  • the gray level range of the third gray level area is 128-255 gray levels.
  • the optimized debug grayscale vector can be obtained faster, and the N-order compensation relationship obtained based on the optimized debug grayscale vector is not only for high
  • the ripples under the brightness level have a good compensation effect
  • the ripples under the low brightness level have a good compensation effect.
  • Step S220 Obtain the N-level compensation relationship of the pixel unit based on the test gray-level vector.
  • step S220 obtaining the N-order compensation relational expression based on the test gray scale vector includes the following steps S221 to S224.
  • Step S221 Obtain respectively N+1 brightness data when the pixel unit displays N+1 test grayscale data.
  • Step S222 Obtain N+1 equivalent grayscale data respectively based on the N+1 brightness data.
  • Step S223 Obtain N+1 corrected grayscale data based on N+1 brightness data and N+1 test grayscale data, respectively.
  • Step S224 Determine the value of the N+1 parameters based on the N+1 equivalent grayscale data and the N+1 corrected grayscale data, thereby determining the N-level compensation relationship.
  • step S221, step S222, step S223, and step S224 can be referred to step S120, step S131, step S132, and step S133, respectively, and will not be repeated here.
  • step S221, step S222, step S223, and step S224 may be executed sequentially; for another example, step S222, step S221, step S223, and step S224 may be executed sequentially. For another example, step S221, step S223, step S222, and step S224 may be executed sequentially.
  • Step S230 Correct the gray scale of the pixel unit based on the N-order compensation relationship, and evaluate the correction effect of the N-order compensation relationship.
  • step S230 may be performed for a single display panel; for another example, step S230 may also be performed for multiple display panels to improve the universality of optimized test grayscale data (or optimized debug grayscale data).
  • the multiple display panels have the same product parameters (for example, size, physical resolution, etc.), and may belong to the same batch or different batches.
  • step S230 correcting the gray scale of the pixel unit based on the N-order compensation relationship, and evaluating the correction effect of the N-order compensation relationship includes the following steps S231 to S234.
  • step S231, step S232, step S233, and step S234 may be executed sequentially.
  • Step S231 Compensate the to-be-displayed data signal of the pixel unit by using the N-order compensation relationship to obtain the compensated data signal.
  • Step S232 Use the compensated data signal to drive the pixel unit for display.
  • Step S233 Obtain current brightness data of the pixel unit when the compensated data signal is displayed (for example, it may also be referred to as current brightness data of the pixel unit).
  • the image capturing device may be used to photograph the pixel unit to obtain the current brightness data of the pixel unit; for another example, the current brightness data of the pixel unit may also be obtained through data reception.
  • Step S234 Compare the current brightness data of the pixel unit with the theoretical brightness data of the pixel unit to determine whether the correction effect of the N-order compensation relationship meets the correction requirement.
  • step S234 when the difference between the current brightness data of the pixel unit and the theoretical brightness data of the pixel unit is less than the brightness threshold, it can be determined that the correction effect meets the correction requirement; When the difference of the theoretical brightness data is greater than or equal to the brightness threshold, it is determined that the correction effect does not meet the correction requirement.
  • the brightness threshold may be set according to user requirements, industry standards, or differences before and after compensation, which is not specifically limited in the embodiments of the present disclosure.
  • the brightness threshold may be 1%-10% (for example, 5%, 10%) of the theoretical brightness data or other applicable values.
  • Step S240 When the correction effect meets the correction requirement, the test grayscale vector is used as the debugging grayscale vector; when the correction effect does not meet the correction requirement, the test grayscale vector is adjusted until the N level obtained based on the test grayscale vector The compensation relationship makes the correction effect of the gray scale correction of the pixel unit meet the correction requirement.
  • Fig. 3 is another exemplary flowchart of a method for obtaining compensation parameters of a pixel unit provided by at least one embodiment of the present disclosure.
  • a new test grayscale vector is selected (for example, randomly selected or set based on experience) based on the method described in step S210.
  • step S220-step S230 based on the new test gray scale vector to obtain a new N-order compensation relationship, and evaluate the correction effect of the new N-order compensation relationship, that is, determine the above-mentioned new N-order compensation Whether the relationship meets the calibration requirements.
  • the new test grayscale vector can be used as the debugging grayscale vector, and the optimization process of the test grayscale vector and the acquisition of the compensation parameter of the pixel unit are ended.
  • Method In the case that the correction effect does not meet the correction requirement, the test grayscale vector is further adjusted until the N-level compensation relationship obtained based on the test grayscale vector makes the correction effect of the grayscale correction of the pixel unit meet the correction requirement.
  • the correction effect of the new N-order compensation relationship is better than the optimal compensation effect so far. If the new N-order compensation The correction effect of the relational expression is better than the best compensation effect so far, then the new test gray-scale vector is recorded, which can ensure the gradual nature of the random optimization algorithm, so that the optimal solution (optimum test Grayscale vector or debug grayscale vector).
  • the correction effect of the new N-order compensation relationship is better than the sub-optimal compensation effect so far (sub-optimal compensation effect For the optimal compensation effect in addition to the optimal compensation effect), if the correction effect of the new N-order compensation relationship is better than the sub-optimal compensation effect so far, then record the above new test gray-scale vector. In this case, more test grayscale vectors with good compensation effects can be recorded.
  • At least one embodiment of the present disclosure also provides a display debugging method of a display panel, the display panel including a plurality of pixel units.
  • FIG. 4 is a schematic flowchart of a display debugging method of a display panel provided by at least one embodiment of the present disclosure.
  • the display debugging method of the display panel includes the following steps S310 and S320.
  • step S310 and step S320 may be executed sequentially.
  • Step S310 Determine the pixel unit with display deviation in the display panel.
  • Step S320 Apply the display debugging method of the pixel unit provided by at least one embodiment of the present disclosure for each pixel unit with display deviation, so as to obtain an N-order compensation relationship for each pixel unit with display deviation.
  • step S310 determining the pixel unit with display deviation in the display panel includes the following steps S311 to S314.
  • Step S311 Select a grayscale vector for debugging.
  • the specific method for selecting and debugging the grayscale vector can be referred to step S110, which will not be repeated here.
  • Step S312 Obtain N+1 brightness matrices when each pixel unit of the display panel displays N+1 debugging grayscale data.
  • Step S313 Obtain N+1 theoretical brightness matrices based on N+1 debugging grayscale data.
  • Step S314 Based on the N+1 brightness matrices, the N+1 theoretical brightness matrices, and the moiré determination threshold, the pixel units with display deviations in the display panel are determined.
  • step S311-step S314 may be executed sequentially.
  • step S311, step S312+step S313 (step S312 and step S313 are executed simultaneously), and step S314 may be executed sequentially.
  • the debugging grayscale vector includes N+1 debugging grayscale data.
  • N is an integer greater than or equal to 2.
  • N+1 brightness matrices may be obtained through an optical method.
  • LUM_test is one of N+1 brightness matrices
  • LUM_test can be a brightness matrix LUM_test_1, a brightness matrix LUM_test_2, or a brightness matrix LUM_test_3.
  • the brightness matrix LUM_test includes m rows and n columns, that is, the size (or dimension) of the brightness matrix LUM_test is m ⁇ n.
  • N+1 brightness matrices of each pixel unit of the display panel when displaying N+1 debugging grayscale data can also be obtained by receiving or reading.
  • step S313 N+1 theoretical brightness matrices can be obtained based on N+1 debugging grayscale data using the following expression:
  • g is one of N+1 debugging grayscale data.
  • the debugging grayscale data can be g1, g2, or g3;
  • G_max is the maximum grayscale that can be displayed by the pixel unit, for example, the grayscale that can be displayed in the pixel unit.
  • LUM_theo is one of N+1 theoretical brightness matrices, for example, LUM_theo can be the theoretical brightness matrix LUM_theo_1 corresponding to the debugging gray-scale data g1, which corresponds to the debugging gray
  • LUM_max may be a brightness matrix (for example, a theoretical brightness matrix) of the display panel at the maximum gray scale (for example, 255 gray scale) that the display panel can display.
  • the size of the matrix LUM_max is m ⁇ n.
  • step S314 if the pixel unit located in the i-th row and j-th column of the display panel also satisfies the following moiré determination expression, it can be determined that the pixel unit is a pixel unit with display deviation in the display panel:
  • LUM_test_1(i,j), LUM_test_2(i,j) and LUM_test_3(i,j) are the pixel units located in the i-th row and j-th column of the display panel, respectively.
  • the brightness data; LUM_theo_1(i,j), LUM_theo_2(i,j), and LUM_theo_3(i,j) are the pixel units located in the i-th row and j-th column of the display panel, corresponding to the debugging grayscale data g1, g2, and g3
  • the theoretical brightness data of; Lth1, Lth2, and Lth3 are the ripple determination thresholds corresponding to the debugging grayscale data g1, g2, and g3, respectively.
  • the ripple determination thresholds Lth1, Lth2, and Lth3 may be equal to each other (for example, all equal to Lth).
  • the moire determination thresholds Lth1, Lth2, and Lth3 can be set according to the user's tolerance for moire. For example, when the user's tolerance for moiré is low, the moiré determination threshold can be made smaller (0.001); when the user's tolerance for moiré is high, the moiré determination threshold can be made larger (0.01).
  • different moiré determination thresholds Lth1, Lth2, and Lth3 can be set for pixel units of different colors.
  • the ripple of the display panel at a low brightness level can also be made weaker, thereby making it possible to apply the method provided by at least one embodiment of the present disclosure.
  • the display debugging method of the display panel The display panel has a good compensation effect for the ripples at low brightness levels.
  • the moiré determination expression described above can be used to determine whether any pixel unit of the display panel is a pixel unit with display deviation.
  • matrix calculations can be used to simultaneously obtain pixel units with display deviations in the display panel.
  • the position of the non-zero element in the matrix operation expression in the following matrix operation expression can be used to determine the pixel unit with display deviation in the display panel:
  • step S320 can be used to obtain the N-order compensation relationship for each of the pixel units with display deviations; After each of the pixel units obtains the N-order compensation relationship, the display debugging method of the display panel can be completed.
  • step S310 may be used to obtain the omitted Steps can obtain information.
  • step S110 and step S120 it is not necessary to perform step S110 and step S120, but use step S311 and step S312 to obtain the debugging gray scale vector and the N+1 brightness data of the pixel unit when displaying N+1 debugging gray scale data.
  • FIG. 5 shows an example of a display debugging method of a display panel provided by at least one embodiment of the present disclosure.
  • the display debugging method of the display panel provided by at least one embodiment of the present disclosure will be exemplarily described below in conjunction with FIG. 5.
  • an example of the display debugging method of the display panel includes the following steps S410 to S470 and step S490.
  • Step S410 Divide the grayscale range that can be displayed on the display panel into N+1 (here, three) grayscale regions.
  • the grayscale range that can be displayed on the display panel can be divided into a first grayscale area (the grayscale range is 0-31 grayscale) and a second grayscale area (the grayscale range is 32-127 grayscale. Level) and the third gray level area (gray level range is 128-255 gray level).
  • Step S420 randomly select one piece of debugging gray scale data from the N+1 gray scale regions to form a debugging gray scale vector.
  • Step S430 Obtain N+1 brightness matrices when the display panel displays N+1 debugging grayscale data.
  • step S430 may include the following steps. First, make the display panel display grayscale data g1 (26), and use a CCD camera to take pictures of the display panel to record the brightness matrix LUM_test_1 of the display panel; then, make the display panel display grayscale data g2 (108), and use The CCD camera takes a picture of the display panel to record the brightness matrix LUM_test_2 of the display panel; then, the display panel is made to display the grayscale data g3 (207), and the CCD camera is used to take pictures of the display panel to record the brightness matrix of the display panel LUM_test_3.
  • step S430 may further include receiving or reading N+1 brightness matrices when the display panel displays N+1 debugging grayscale data.
  • Step S440 Obtain N+1 theoretical brightness matrices based on N+1 debugging grayscale data.
  • step S440 the following expression can be used to obtain N+1 theoretical brightness matrices based on N+1 debugging grayscale data:
  • g is one of N+1 debugging grayscale data
  • the debugging grayscale data can be g1, g2, or g3
  • G_max is the maximum grayscale that the pixel unit can display
  • LUM_theo is N+1 theoretical brightness matrix One
  • LUM_max is the brightness matrix of the display panel at the maximum gray scale that the display panel can display.
  • LUM_theo may be a theoretical brightness matrix LUM_theo_1 corresponding to the debug grayscale data g1, theoretical brightness data LUM_theo_2 corresponding to the debug grayscale data g2, or theoretical brightness data LUM_theo_3 corresponding to the debug grayscale data g3.
  • Step S450 Determine pixel units with display deviations in the display panel.
  • step S450 the pixel units with display deviations in the display panel can be determined based on the N+1 brightness matrices, N+1 theoretical brightness matrices, and the moiré determination threshold, and thus the display panel can be divided into moiré regions and non-corrugated Ripple area.
  • pixel units with display deviations (all pixel units with display deviations) in the display panel can be determined based on the aforementioned moiré determination expression.
  • a specific determination method please refer to the embodiment shown in FIG. 3, which will not be repeated here.
  • Step S460 Obtain N+1 ripple area brightness matrices and N+1 ripple area theoretical brightness matrices.
  • step S460 based on the location of the pixel unit with display deviation in the display panel, the brightness matrix of the N+1 display panels, and the N+1 theoretical brightness matrix, N+1 ripple area brightness matrices and N +1 theoretical brightness matrix of ripple area.
  • the brightness matrix of the N+1 display panels corresponding to the matrix elements of the pixel unit without brightness deviation can be assigned to zero to obtain the brightness matrix of the N+1 corrugated area
  • the brightness matrix of the N+1 corrugated area can be obtained by adding the N+1 In the theoretical brightness matrix
  • the matrix element corresponding to the pixel unit without brightness deviation is assigned a value of zero to obtain the theoretical brightness matrix of N+1 ripple areas.
  • Step S470 Obtain the N-order compensation relation formula of each pixel unit of the display panel with display deviation.
  • step S470 the N-order compensation relationship of each pixel unit with display deviation of the display panel may be obtained based on the N+1 moiré area brightness matrix and the N+1 moire area theoretical brightness matrix.
  • step S470 may include the following steps S471 to S473.
  • Step S471 Obtain N+1 equivalent gray-scale matrices of the ripple area respectively based on the N+1 ripple area brightness matrices.
  • Step S472 Obtain N+1 corrected grayscale matrices of the ripple area based on the N+1 ripple area brightness matrices and N+1 debugging grayscale data, respectively.
  • Step S473 Determine the value of the N+1 parameters of each pixel unit with display deviation based on the N+1 equivalent gray-scale matrix of the ripple area and the N+1 corrected gray-scale matrix of the ripple area, thereby determining the value of each pixel unit N-order compensation relationship for a pixel unit with display deviation.
  • step S471-step S473 can be executed sequentially.
  • step S471 the following expressions may be used to obtain the equivalent gray-scale matrices of N+1 ripple areas based on the brightness matrices of the N+1 ripple areas:
  • ⁇ is the index of the relationship curve between grayscale and transmittance (ie, gamma value, usually a constant between 2-2.4);
  • LUM_test_mura is one of the brightness matrices of the ripple area of N+1 display panels; for example, LUM_test_mura can Is the ripple area brightness matrix LUM_test_mura_1 corresponding to the debug grayscale data g1, the ripple area brightness matrix LUM_test_mura_2 corresponding to the debug grayscale data g2 or the ripple area brightness matrix LUM_test_mura_3 corresponding to the debug grayscale data g3;
  • G_eff_mura is N+1 ripples
  • One of the equivalent grayscale matrices of the region for example, the equivalent grayscale matrix of the ripple region is the equivalent grayscale data G_eff_mura_1 of the ripple region corresponding to the debugging grayscale data g1 and the ripple region brightness matrix LUM_test_mura_1, which corresponds to the debugging gray
  • step S472 includes the following steps S4721-step S4722.
  • Step S4721 Determine N+1 ripple area ratio coefficient matrices based on N+1 ripple area brightness matrices and N+1 ripple area theoretical brightness data.
  • Step S4722 Obtain N+1 corrected grayscale matrices of the ripple area based on the N+1 ripple area proportional coefficient matrices and N+1 debugging grayscale data.
  • step S4721 and step S4722 can be executed sequentially.
  • step S4721 the following expressions can be used to determine N+1 ripple area ratio coefficient matrices based on N+1 ripple area brightness matrices and N+1 ripple area theoretical brightness data:
  • Ra_mura LUM_theo_mura./LUM_test_mura.
  • Ra_mura is one of the N+1 corrugation area ratio coefficient matrices.
  • Ra_mura can be the corrugation area ratio coefficient matrix Ra_mura_1 obtained based on the ripple area theoretical brightness data Lum_theo_mura_1 and the ripple area brightness data Lum_test_mura_1, based on the ripple area theoretical brightness data
  • the ripple area scale coefficient matrix Ra_mura_3 obtained based on the ripple area theoretical brightness data Lum_theo_mura_3 and the ripple area brightness data Lum_test_mura_3.
  • step S4722 the following expression can be used to obtain N+1 corrected gray scale matrices of the ripple area based on the N+1 scale coefficient matrices of the ripple area and the N+1 adjustment gray scale data:
  • G_corre_mura is one of the N+1 corrected grayscale matrices of the ripple area.
  • G_corre_mura can be the corrected grayscale matrix G_corre_mura_1 obtained from the scale coefficient matrix Ra_mura__1 and the debugging grayscale data g1, based on the scale The coefficient matrix Ra_mura__2 and the corrected gray-scale matrix G_corre_mura_2 of the corrugated area obtained by the adjustment gray-scale data g2, or the corrected gray-scale matrix G_corre_mura_3 obtained based on the scale coefficient matrix Ra_mura__3 and the adjusted gray-scale data g3.
  • step S473 the value of the N+1 parameters of each pixel unit with display deviation may be determined based on the N+1 equivalent gray-scale matrices of the ripple area and the N+1 corrected gray-scale matrices of the ripple area. Therefore, it is possible to determine the N-order compensation relationship of each pixel unit with display deviation in the display panel.
  • N-order compensation relationship of each pixel unit with display deviation in the display panel is the following expression:
  • y_mura a_mura.*(x_mura) 2 +b_mura.*x_mura+c_mura.
  • the parameter matrix a_mura, the parameter matrix b_mura, and the parameter matrix c_mura are N+1 parameter matrices, and the size of the parameter matrix a_mura, the parameter matrix b_mura, and the parameter matrix c_mura are all m ⁇ n.
  • determining the N-level compensation relational expression based on N+1 equivalent gray-scale data and N+1 corrected gray-scale data includes the following steps S4731 and S4732.
  • step S4731 and step S4732 can be executed sequentially.
  • Step S4731 Make x_mura in the expression (1) equal to N+1 equivalent gray-scale matrices of the ripple area, and make y_mura in the expression (1) equal to N+1 corrected gray-scale matrices of the ripple area, respectively , Resulting in N+1 equations.
  • Step S4732 Determine the parameter matrix a_mura, the parameter matrix b_mura and the parameter matrix c_mura based on N+1 equations.
  • step S4731 a ternary linear matrix equation system composed of the following 3 equations can be obtained:
  • G_corre_mura_1 a_mura.*(G_eff_mura_1) 2 +b_mura.*G_eff_mura_1+c_mura
  • G_corre_mura_2 a_mura.*(G_eff_mura_2) 2 +b_mura.*G_eff_mura_2+c_mura.
  • G_corre_mura_3 a_mura.*G_eff_mura_3) 2 +b_mura.*G_eff_mura_3+c_mura
  • the parameter matrix a_mura, the parameter matrix b_mura, and the parameter matrix c_mura can be determined by solving the matrix equation system.
  • the N-order compensation relational expression obtained in step S473 has a good compensation effect. Therefore, step S490 can be directly performed, that is, the N-order compensation relational expression of each pixel unit with display deviation of the display panel is recorded.
  • the aforementioned N-order compensation relational expressions can be stored in a memory (for example, the memory of a display panel or a display device), so that the display can be used in the display panel.
  • the N-order compensation relationship of the display panel compensates or corrects the to-be-displayed data signal (the to-be-displayed data signal provided to the pixel unit of the display panel that has display deviation) to obtain the compensated The data signal; then the compensated data signal (or corrected data signal) can be used to drive the pixel unit of the display panel with display deviation for display, and the uncompensated data signal can be used to drive the display panel without display deviation Pixel unit for display.
  • the brightness uniformity and/or display effect of the display panel to which the display debugging method of the display panel is applied can be improved.
  • the display debugging of the display panel An example of the method further includes the following step S480.
  • Step S480 Correct the gray scale of the corresponding pixel unit based on the N-level compensation relationship of each pixel unit with display deviation of the display panel, and evaluate the correction effect.
  • step S480 refers to step S230, which will not be repeated here.
  • step S480 when the correction effect meets the correction requirement, the N-order compensation relationship of each pixel unit with display deviation on the display panel can be recorded; when the correction effect does not meet the correction requirement, adjust the adjustment grayscale Step vector, and perform step S420-step S480 again until the correction effect of the gray-scale correction meets the correction requirement.
  • step S410-step S470 may be executed sequentially.
  • step S440 may also be performed after step S430.
  • the theoretical brightness data Lum_theo_1 20 nits corresponding to the debug grayscale data g1.
  • the scale factor data Ra_1 obtained based on the theoretical brightness data Lum_theo_1 and the brightness data Lum_test_1:
  • Ra_1 Lum_theo_1/Lum_test_1.
  • the corrected gray scale data G_corre_1 can be obtained:
  • the equivalent gray-scale data G_eff_2 and the corrected gray-scale data G_corre_2 corresponding to the adjusted gray-scale data g2 are respectively 99 and 120
  • the equivalent gray scale data G_eff_3 and the corrected gray scale data G_corre_3 corresponding to the scale data g3 are 189 and 234, respectively.
  • G_eff_1 For example, based on G_eff_1 (23), G_corre_1 (29), G_eff_2 (99), G_corre_2 (120), G_eff_3 (189), and G_corre_3 (234) and using the following expressions to obtain the parameters a_A, b_A and corresponding to the pixel unit A c_A:
  • G_corre_1 a_A ⁇ (G_eff_1) 2 +b_A ⁇ G_eff_1+c_A
  • G_corre_2 a_A ⁇ (G_eff_2) 2 + b_A ⁇ G_eff_2+c_A.
  • G_corre_3 a_A ⁇ (G_eff_3) 2 +b_A ⁇ G_eff_3+c_A
  • the N-order compensation relationship of other pixel units with display deviations in the display panel can be obtained, which will not be repeated here.
  • At least one embodiment of the present disclosure also provides a display debugging device for a display panel.
  • Fig. 6 shows an exemplary block diagram of a display debugging device for a display panel provided by at least one embodiment of the present disclosure.
  • the display debugging device of the display panel includes a processor and a memory.
  • the processor and the memory may be connected through a bus system, and the bus system may be, for example, a serial or parallel communication bus, which is not specifically limited in the embodiments of the present disclosure.
  • computer program instructions are stored in the memory, and the following steps are executed when the computer program instructions are executed by the processor: determine the pixel unit with display deviation in the display panel; apply any of the embodiments of the present disclosure to each pixel unit with display deviation
  • the pixel unit display debugging method is provided to obtain the N-order compensation relational expression for each pixel unit with display deviation.
  • the specific implementation method for determining the pixel unit with display deviation in the display panel can refer to step S310, and the specific implementation method for obtaining the N-order compensation relationship for each pixel unit with display deviation can refer to step S320. Repeat.
  • the processor described in FIG. 6 and the processor used in other examples of the present disclosure are, for example, a central processing unit (CPU) or other forms of processing units with data processing capabilities and/or instruction execution capabilities.
  • the processor may It is implemented as a general-purpose processor, and is also a single-chip microcomputer, a microprocessor, a digital signal processor, a dedicated image processing chip, or a field programmable logic array, etc.
  • the memory may include, for example, volatile memory and/or nonvolatile memory, and may include, for example, read-only memory (ROM), hard disk, flash memory, and the like.
  • the memory may be implemented as one or more computer program products, and the computer program products may include various forms of computer-readable storage media, and one or more computer programs may be stored on the computer-readable storage medium instruction.
  • the processor may run the program instructions to determine the pixel units with display deviations in the display panel and obtain the N-order compensation relationship for each of the pixel units with display deviations.
  • the memory can also store various other application programs and various data, such as N+1 debugging grayscale data, etc., and various data used and/or generated by the application program.
  • the display debugging device of the display panel further includes an image acquisition device; in another example, the display debugging device of the display panel does not include an image acquisition device. In this case, the brightness matrix provided by the image acquisition device can be received .
  • FIG. 7 shows an exemplary block diagram of a storage medium 200 provided by at least one embodiment of the present disclosure.
  • the storage medium 200 stores computer program instructions, and the computer program instructions execute the following when executed by a processor Step: Select the debugging grayscale vector.
  • the debugging grayscale vector includes N+1 debugging grayscale data; respectively obtain N+1 brightness data when the pixel unit displays N+1 debugging grayscale data;
  • the N-order compensation relational expression of the pixel unit is obtained based on the N+1 luminance data.
  • the N-order compensation relational expression includes N+1 parameters.
  • N is an integer greater than or equal to 2.
  • step S110, step S120, and step S130 select the debug gray scale vector, obtain the N+1 brightness data of the pixel unit when displaying N+1 debug gray scale data, and obtain the specific implementation method of the N-level compensation relationship of the pixel unit based on the N+1 brightness data Refer to step S110, step S120, and step S130, which will not be repeated here.
  • the storage medium 200 shown in FIG. 7 and other storage media provided by the embodiments of the present disclosure may include various forms of computer-readable storage media (for example, non-transitory computer-readable storage media), such as volatile memory and/ Or non-volatile memory.
  • Volatile memory may include random access memory (RAM) and/or cache memory (cache), for example.
  • Non-volatile memory may include, for example, magnetic storage media, optical storage media, semiconductor storage media, such as read-only memory (ROM), hard disk, flash memory, and the like.
  • the storage medium 200 shown in FIG. 7 can be used to obtain the N-order compensation relational expression of the pixel unit, so that when the display panel including the pixel unit displays an image, the N-order compensation relational expression can be provided to
  • the display data of the pixel unit is corrected (for example, grayscale correction), thereby improving the brightness accuracy of the pixel unit using the display debugging method of the pixel unit, and improving the brightness of the display panel using the display debugging method of the pixel unit Uniformity and/or display effect.
  • FIG. 8 shows an exemplary block diagram of another storage medium 300 provided by at least one embodiment of the present disclosure.
  • the storage medium 300 stores computer program instructions, which are executed when the processor is running. The following steps: determine the pixel unit with display deviation in the display panel; apply the display debugging method of the pixel unit provided in any embodiment of the present disclosure for each pixel unit with display deviation, to target each pixel unit with display deviation One obtains the N-order compensation relationship.
  • the specific implementation method for determining the pixel unit with display deviation in the display panel can refer to step S310, and the specific implementation method for obtaining the N-order compensation relationship for each pixel unit with display deviation can refer to step S320. Repeat.
  • the storage medium 300 shown in FIG. 8 can be used to obtain N-order compensation relational expressions for each of the pixel units with display deviations, so that the data to be displayed on the display panel can be determined based on these N-order compensation relational expressions.
  • the signal (the data signal to be displayed provided to the pixel unit of the display panel with display deviation) is compensated or corrected (for example, gray scale correction) to obtain the compensated data signal; then the compensated data signal (or The corrected data signal) drives the pixel unit of the display panel with display deviation for display, and uses the uncompensated data signal to drive the pixel unit of the display panel without display deviation for display.
  • the brightness uniformity and/or display effect of the display panel to which the display debugging method of the display panel is applied can be improved.
  • FIG. 9 shows an exemplary flowchart of a compensation method for a pixel unit provided by at least one embodiment of the present disclosure. As shown in FIG. 9, the compensation method of the pixel unit includes the following steps 510 to 530.
  • Step 510 Obtain the to-be-displayed data signal of the pixel unit.
  • Step 520 Compensate the data signal to be displayed by using the N-order compensation relational expression obtained based on the display debugging method of the pixel unit provided by any embodiment of the present disclosure to obtain the compensated data signal.
  • Step 530 Provide the compensated data signal to the pixel unit, so that the compensated data signal can be used to drive the pixel unit for display.
  • the pixel unit is any pixel unit with display deviation in the display panel.
  • the compensated data signal may be obtained based on the to-be-displayed data signal of the pixel unit with display deviation and the following expression:
  • x can be made equal to the data signal to be displayed, and y obtained using the above expression can be used as the compensated data signal.
  • the compensation method for pixel units provided by at least one embodiment of the present disclosure can be used to obtain compensated data signals (that is, to correct the data signals) for pixel units with display deviations, thereby improving the application
  • compensated data signals that is, to correct the data signals
  • the brightness accuracy of the pixel unit in the display of the compensation method of the pixel unit is improved, and the brightness uniformity and/or the display effect of the display panel including the pixel unit are improved.
  • FIG. 10 shows an exemplary flowchart of a compensation method for a display panel provided by at least one embodiment of the present disclosure. As shown in FIG. 10, the compensation method of the display panel includes the following steps 610-630.
  • Step 610 Obtain the to-be-displayed data signals of the pixel units with display deviations in the display panel.
  • Step 620 Use the display debugging method based on the display panel provided by any embodiment of the present disclosure to compensate the data signal to be displayed for each acquired N-order compensation relational expression of the pixel unit with display deviation, so as to obtain the compensated data signal.
  • Step 630 Provide the compensated data signal to the pixel unit with display deviation in the display panel, so that the compensated data signal can be used to drive the pixel unit with display deviation in the display panel for display.
  • step 620 For example, for the specific implementation method of step 620, refer to step 520, which will not be repeated here.
  • the compensation method for a display panel provided by at least one embodiment of the present disclosure can be used to obtain a compensated data signal for a pixel unit with a display deviation in the display panel (that is, for a pixel unit with a display deviation in the display panel).
  • the data signal is corrected), so that the brightness uniformity and/or display effect of the display panel to which the above-mentioned display panel compensation method is applied can be improved.
  • At least one embodiment of the present disclosure also provides a display compensation device, which is used to drive a display panel.
  • FIG. 11 shows an exemplary block diagram of a display compensation device 400 provided by at least one embodiment of the present disclosure.
  • the display compensation device 400 includes a processor and a memory.
  • the memory stores computer program instructions and is based on this
  • the N-order compensation relational expression obtained by the display debugging method of the pixel unit provided by any one of the embodiments is disclosed.
  • the computer program instruction is executed by the processor, the following steps are executed: obtaining the data signal to be displayed of the pixel unit with display deviation of the display panel;
  • the data signal to be displayed is compensated by using the N-order compensation relational expression to obtain the compensated data signal;
  • the compensated data signal is provided to the pixel unit so that the compensated data signal can be used to drive the pixel unit for display.
  • the display compensation device can be used to obtain compensated data signals for pixel units of the display panel with display deviations, so that the display compensation device can improve the brightness uniformity of the display panel used with the display compensation device And/or display effect.
  • At least one embodiment of the present disclosure further provides a display device, which includes a display panel and the display compensation device provided in any embodiment of the present disclosure, and the display device may be implemented as an organic light emitting diode display device.
  • FIG. 12 is a schematic block diagram of a display device provided by at least one embodiment of the present disclosure.
  • the display device 500 includes a display compensation device and a display panel 504.
  • the display compensation device may be the display compensation device 400.
  • the display panel 504 includes a plurality of pixel units arranged in an array.
  • each pixel unit includes a light emitting element (for example, an OLED) and a driving circuit configured to drive the light emitting element to emit light.
  • the driving circuit includes at least a driving transistor and a switching transistor.
  • the display device may further include a controller 501, a data driver 502, and a gate driver 503.
  • the controller 501 includes a timing controller T-con and the aforementioned display compensation device.
  • the display compensation device may be provided in the timing controller T-con.
  • the timing controller is configured to receive image data RGB input from the outside of the display device 500, and process the image data RGB input externally so that the processed image data matches the size and resolution of the display panel, and the processed image data
  • the image data (data signal to be displayed or initial data signal) is provided to the display compensation device.
  • the timing controller is also used to output a gate scan control signal GCS (Gate Control Signal) and a data control signal DCS (Data Control Signal) to the gate driver 503 and the data driver 502, respectively, to control the gate driver 503 and data respectively.
  • GCS Gate Control Signal
  • DCS Data Control Signal
  • the display compensation device is configured to: obtain the data signal to be displayed of the pixel unit of the display panel; adopt an N-order compensation relation (for example, the N-order compensation relation stored in a memory) to be displayed (for example, The data signal to be displayed for driving the pixel unit with display deviation) is compensated to obtain the compensated data signal; the compensated data signal is provided (under the control of the timing controller) to the pixel unit of the display panel ( There are pixel units with display deviations in the display panel, so that the compensated data signal can be used to drive the pixel units of the display panel for display.
  • N-order compensation relation for example, the N-order compensation relation stored in a memory
  • the compensated data signal provided by the display compensation device can be provided to the pixel unit of the display panel via the data driver 502, that is, the compensated data signal provided by the display compensation device can be first provided to the data driver 502, and then the data driver 502 After the relevant processing is performed in 502, it is provided to the pixel unit of the display panel.
  • the gate driver 503 is configured to be connected to the switching transistor through a plurality of gate lines, and is configured to provide a gate scan signal to the switching transistor, thereby controlling the on state (on or off) of the switching transistor.
  • the data driver 502 is configured to receive the compensated data signal output by the display compensation device, and then provide the compensated data signal to the display panel 504.
  • the compensated data signal is, for example, a compensated pixel voltage, and is configured to control the light-emitting element located in the corresponding pixel unit so that it presents a certain gray scale during display operation. The higher the pixel voltage after compensation, the larger the gray scale, and thus the greater the intensity of light emitted by the light-emitting element.
  • the data driver 502 may include a digital driver or an analog driver.
  • the analog driver is configured to receive an analog signal, and then the analog signal is provided to the pixel unit of the display panel via a thin film transistor;
  • the digital driver is configured to receive a digital signal, using D/A (digital/analog) conversion and gamma correction The digital signal is converted into an analog signal, and the analog signal obtained by the conversion is provided to the pixel unit of the display panel via a thin film transistor.
  • D/A digital/analog
  • the gate driver 503 and the data driver 502 can be implemented as integrated circuit chips and connected to the display panel 504 through bonding; in another exemplary example, the gate driver 503 and the data driver 502 can also be fabricated through a semiconductor manufacturing process.
  • the pole driver 503 and the data driver 502 are directly prepared in the peripheral area of the display panel 504.
  • the brightness uniformity and/or display effect of the display panel can be improved.
  • N in the embodiment of the present disclosure is not limited to be equal to 2. According to actual application requirements, N in the embodiment of the present disclosure may also be equal to 3, 4 or other applicable values.
  • the maximum gray scale that the pixel unit of the embodiment of the present disclosure can display is not limited to equal to 255 gray scale. According to actual application requirements, the maximum gray scale that the pixel unit of the embodiment of the present disclosure can display may also be equal to 64, 1024 or Other applicable values.
  • the medium is not limited to being used in organic light-emitting diode display devices (and/or display panels). According to actual application requirements, it can also be applied to inorganic light-emitting diode display devices (and/or display panels), liquid crystal display devices ( And/or display panel).

Abstract

一种像素单元的显示调试方法、显示方法和补偿参数获取方法、显示面板的显示调试方法和装置、显示补偿装置、显示装置以及存储介质。该像素单元的显示调试方法包括：选择调试灰阶向量(S110)，在该步骤中，调试灰阶向量包括N+1个调试灰阶数据；分别获取像素单元在显示N+1个调试灰阶数据时的N+1个亮度数据(S120)；基于N+1个亮度数据获取像素单元的N阶补偿关系式(S130)，在该步骤中，N阶补偿关系式包括N+1个参数，N为大于等于2的整数。该像素单元的显示调试方法、显示方法和补偿参数获取方法、显示面板的显示调试方法和装置、显示补偿装置、显示装置以及存储介质可以提升显示效果。

Description

显示调试方法、补偿方法及装置、显示装置和存储介质
对相关申请的交叉参考
本申请要求于2019年4月18日递交的中国专利申请第201910313273.4号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开的实施例涉及一种像素单元的显示调试方法、像素单元的补偿方法、像素单元的补偿参数获取方法、显示面板的显示调试方法、显示面板的显示调试装置、显示补偿装置、显示装置以及存储介质。
背景技术
平板显示器件因具有机身薄、省电、无辐射(例如，无电磁辐射)等优点而得到了广泛的应用。目前主流的平板显示器件包括液晶显示器件(Liquid Crystal Display，LCD)以及有机发光二极管显示器件(Organic Light Emitting Display，OLED)。
有机发光二极管(Organic Light Emitting Diode，OLED)显示器件具有视角宽、对比度高、响应速度快、亮度高、发光效率高、厚度小、可弯曲、工作温度范围大、自发光等特点。由于具有上述特点和优势，有机发光二极管(OLED)显示器件逐渐受到人们的广泛关注并且可以适用于手机、显示器件、笔记本电脑、数码相机、仪器仪表等具有显示功能的装置。
发明内容
本公开的至少一个实施例提供了一种像素单元的显示调试方法，该像素单元的显示调试方法包括：选择调试灰阶向量，在该步骤中，所述调试灰阶向量包括N+1个调试灰阶数据；分别获取所述像素单元在显示所述N+1个调试灰阶数据时的N+1个亮度数据；基于所述N+1个亮度数据获取所述像素单元的N阶补偿关系式，在该步骤中，所述N阶补偿关系式包括N+1个 参数，N为大于等于2的整数。
例如，在所述显示调试方法的至少一个示例中，所述像素单元存在显示偏差。
例如，在所述显示调试方法的至少一个示例中，所述N+1个亮度数据通过光学方法获取。
例如，在所述显示调试方法的至少一个示例中，基于所述N+1个亮度数据获取所述像素单元的N阶补偿关系式包括：基于所述N+1个亮度数据分别获取N+1个等效灰阶数据；基于所述N+1个亮度数据和所述N+1个调试灰阶数据分别获取N+1个校正后的灰阶数据；以及基于所述N+1个等效灰阶数据和所述N+1个校正后的灰阶数据确定所述N+1个参数的值，由此确定所述N阶补偿关系式。
例如，在所述显示调试方法的至少一个示例中，所述N等于2，所述N阶补偿关系式为以下的表达式(1)：
y＝a×x 2+b×x+c，            (1)
其中，参数a、b和c为所述N+1个参数；基于所述N+1个等效灰阶数据和所述N+1个校正后的灰阶数据确定所述N阶补偿关系式包括：在所述表达式(1)使得x分别等于所述N+1个等效灰阶数据，且使得y分别等于所述N+1个校正后的灰阶数据，由此得到N+1个方程式；以及基于所述N+1个方程式确定所述参数a、所述参数b和所述参数c。
例如，在所述显示调试方法的至少一个示例中，基于所述N+1个亮度数据和所述N+1个调试灰阶数据分别获取所述N+1个校正后的灰阶数据包括：基于所述N+1个调试灰阶数据获取N+1个理论亮度数据；基于所述N+1个亮度数据和所述N+1个理论亮度数据确定N+1个比例系数数据；以及基于所述N+1个比例系数数据和所述N+1个调试灰阶数据获取所述N+1个校正后的灰阶数据。
例如，在所述显示调试方法的至少一个示例中，所述N+1个理论亮度数据、所述N+1个比例系数数据、所述N+1个校正后的灰阶数据以及N+1个等效灰阶数据分别采用下述的表达式(2)-(5)获取：
Figure PCTCN2020076978-appb-000001
Figure PCTCN2020076978-appb-000002
Figure PCTCN2020076978-appb-000003
Figure PCTCN2020076978-appb-000004
其中，Lum_theo为所述N+1个理论亮度数据之一，Ra为所述N+1个比例系数数据之一，G_corre为所述N+1个校正后的灰阶数据之一，G_eff为所述N+1个等效灰阶数据之一，g为所述N+1个调试灰阶数据之一，Lum_test为所述N+1个亮度数据之一，γ为位于2-2.4的常数，G_max为所述像素单元能够显示的最大灰阶，Lum_max为所述像素单元在所述最大灰阶下的亮度。
例如，在所述显示调试方法的至少一个示例中，选择所述调试灰阶向量包括：将所述像素单元能够显示的灰阶范围划分从小到大的N+1个灰阶区；以及从每个所述灰阶区选取一个灰阶值以形成所述调试灰阶向量。
例如，在所述显示调试方法的至少一个示例中，所述N+1个灰阶区的范围逐渐增大。
本公开的至少一个实施例还提供了一种显示面板的显示调试方法，所述显示面板包括多个像素单元，所述显示面板的显示调试方法包括：确定所述显示面板中存在显示偏差的至少一个像素单元；针对所述存在显示偏差的至少一个像素单元的每个应用本公开的至少一个实施例提供的像素单元的显示调试方法，以针对所述存在显示偏差的至少一个像素单元的每个获取所述N阶补偿关系式。
本公开的至少一个实施例又提供了一种像素单元的补偿方法，该像素单元的补偿方法包括：获取所述像素单元的待显示的数据信号；采用基于本公开任一实施例提供的像素单元的显示调试方法获得的所述N阶补偿关系式对所述待显示的数据信号进行补偿，以获取补偿后的数据信号；将所述补偿后的数据信号提供给所述像素单元，以使得可使用所述补偿后的数据信号驱动所述像素单元进行显示。
本公开的至少一个实施例又再提供了一种像素单元的补偿参数获取方法，该像素单元的补偿参数获取方法包括：选择测试灰阶向量，其中，所述测试灰阶向量包括N+1个测试灰阶数据；基于所述测试灰阶向量获取N阶补偿关系式；基于所述N阶补偿关系式对所述像素单元的灰阶进行校正，并评估校正效果；在所述校正效果满足校正需求的情况下，将所述测试灰阶向量作为调试灰阶向量，在所述校正效果不满足所述校正需求的情况下，调整 所述测试灰阶向量直至所述N阶补偿关系式使得对所述像素单元的灰阶校正的校正效果满足校正需求。
例如，在所述补偿参数获取方法的至少一个示例中，选择所述调试灰阶向量包括：将所述像素单元能够显示的灰阶范围划分从小到大的N+1个灰阶区；以及从每个所述灰阶区选取一个灰阶值以形成所述调试灰阶向量。
本公开的至少一个实施例又再提供了一种显示面板的显示调试装置，包括处理器和存储器。所述存储器中存储有计算机程序指令，所述计算机程序指令被所述处理器运行时执行以下步骤：确定所述显示面板中存在显示偏差的像素单元；针对所述存在显示偏差的像素单元的每个应用本公开任一实施例提供的像素单元的显示调试方法，以针对所述存在显示偏差的像素单元的每个获取所述N阶补偿关系式。
本公开的至少一个实施例又再提供了一种显示补偿装置，用于驱动显示面板，且包括处理器和存储器。所述存储器中存储有计算机程序指令以及基于本公开任一实施例提供的像素单元的显示调试方法获得的所述N阶补偿关系式，所述计算机程序指令被所述处理器运行时执行以下步骤：获取所述显示面板的存在显示偏差的像素单元的待显示的数据信号；采用所述N阶补偿关系式对所述待显示的数据信号进行补偿，以获取补偿后的数据信号；将所述补偿后的数据信号提供给所述像素单元，以使得可使用所述补偿后的数据信号驱动所述像素单元进行显示。
本公开的至少一个实施例又再提供了一种显示装置，该显示装置包括：显示面板以及本公开任一实施例提供的显示补偿装置。
本公开的至少一个实施例又再提供了一种存储介质，其包括存储在所述存储介质上的计算机程序指令。所述计算机程序指令被处理器运行时执行以下步骤：选择调试灰阶向量，在该步骤中，所述调试灰阶向量包括N+1个调试灰阶数据；分别获取所述像素单元在显示所述N+1个调试灰阶数据时的N+1个亮度数据；基于所述N+1个亮度数据获取所述像素单元的N阶补偿关系式，所述N阶补偿关系式包括N+1个参数，在该步骤中，N为大于等于2的整数。
例如，在所述存储介质的至少一个示例中，所述像素单元为显示面板的存在显示偏差的像素单元。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1是根据本公开实施例的一种外部光学补偿系统示意图；
图2A是本公开的至少一个实施例提供的像素单元的显示调试方法的示例性流程图；
图2B是本公开的至少一个实施例提供的像素单元的补偿参数获取方法的一种示例性流程图；
图3是本公开的至少一个实施例提供的像素单元的补偿参数获取方法的另一种示例性流程图；
图4是本公开的至少一个实施例提供的显示面板的显示调试方法的示意性流程图；
图5是本公开的至少一个实施例提供的显示面板的显示调试方法的一个示例；
图6是本公开的至少一个实施例提供的一种显示面板的显示调试装置的示例性框图；
图7是本公开的至少一个实施例提供的一种存储介质的示例性框图；
图8是本公开的至少一个实施例提供的另一种存储介质的示例性框图；
图9是本公开的至少一个实施例提供的像素单元的补偿方法的示例性流程图；
图10是本公开的至少一个实施例提供的显示面板的补偿方法的示例性流程图；
图11是本公开的至少一个实施例提供的显示补偿装置的示例性框图；
图12是本公开至少一个实施例提供的显示装置的示意框图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例，都属于本公开保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
目前，消费者对显示器件的尺寸和分辨率的要求不断增加、并因此对生产工艺的要求也不断增加。然而，目前在显示器件的生产制造过程中，由于生产工艺、制造技术等因素的影响，显示器件可能会出现波纹(Mura)。波纹例如是一种因显示器件的像素单元的显示偏差(例如，亮度偏差)导致的亮度不均匀现象，波纹包括波纹点(也即，单个像素单元的亮度偏差导致的波纹)和波纹块(也即，相邻的多个像素单元的亮度偏差导致的波纹)。例如，波纹包括亮点、暗点、亮块或暗块。在显示器件存在波纹的情况下，显示器件的画面质量将对应地降低，由此降低了用户的使用体验。
本公开的发明人在研究中注意到，亮度均匀性和残像是OLED(有机发光二级管)显示面板目前面临的两个主要问题。为了解决OLED显示面板的关于亮度均匀性和残像的技术问题，除了改善制作工艺之外，研究人员还提出了内部补偿技术和外部补偿技术。
本公开的发明人在研究中注意到，在仅采用内部补偿技术的情况下，亮度均匀性提升以及残像抑制的效果有限，可以通过例如外部补偿技术提升OLED显示面板的补偿效果。下面进行具体说明。
目前，中小尺寸的OLED显示面板中通常采用低温多晶硅薄膜晶体管(LTPS TFT)，大尺寸的OLED显示面板中通常采用氧化物(例如氧化铟镓锌(IGZO))薄膜晶体管。这是因为LTPS TFT的迁移率更大，晶体管所占面积更小，因此，更适合于制作具有高PPI(Pixels Per Inch，每英寸像素数目)的显示面板；氧化物薄膜晶体管均匀性更好，制备工艺与一般的非晶硅薄膜晶体管(a-Si TFT)兼容，因此，更适合在生产线上生产。
对于中小尺寸显示面板中使用的OLED像素电路，由于形成TFT的多晶硅有源层的晶化工艺的限制，不同位置的LTPS TFT可能在诸如阈值电压、迁移率等电学参数上具有非均匀性，这种非均匀性会转化为OLED显示面板的像素单元之间的电流差异和亮度差异，并可能被人眼所感知(即波纹(Mura)现象)。
对于大尺寸显示面板中使用的OLED像素电路，尽管其采用的氧化物薄膜晶体管的工艺均匀性较好，但在氧化物薄膜晶体管持续处于加压和高温的情况下，其阈值电压可能会出现漂移。由于显示画面的不同图像像素对应的灰阶可能不同，显示面板的各个TFT的阈值漂移量可能不同，并且上述阈值漂移量的差异可能会导致在后续的显示周期中，实际显示的画面与预设的显示画面存在偏差，并因此导致残影现象，也就是通常所说的残像。
综上所述，在采用当前的制作工艺制作晶体管的情况下，LTPS TFT和氧化物薄膜晶体管存在均匀性问题和/或稳定性问题；并且，OLED具有亮度随着点亮时间的增加而逐渐衰减的特性。尽管难以通过工艺改进完全克服上述问题，然而可以通过各种补偿技术来应对。
目前，可通过内部补偿技术或外部补偿技术来应对OLED显示面板的亮度均匀性和残像问题。该内部补偿技术是指在像素内部利用TFT构建的补偿子电路进行补偿的方法。该外部补偿技术是指通过外部的驱动电路或外部设备感知像素的电学或光学特性，然后进行对待显示的数据信号进行补偿的方法。在显示面板为高分辨率(QHD(2560x1440)及以上级别)的显示面板的情况下，由于OLED的电路结构复杂且制作工艺的难度较高，如果只对显示面板做内部补偿，有时很难完全消除显示屏幕的波纹现象。因此，为了提高显示面板的良率和/或显示质量、抑制波纹现象，可以在内部补偿的基础上，通过外部补偿进一步地提高显示面板的良率和/或显示质量。
外部补偿技术(也即，Demura技术或波纹擦除技术)是一种用于消除或抑制显示器件的波纹，提升显示画面的亮度均匀性的技术。一种波纹擦除方法可以包括以下的步骤：首先，使得显示器件显示某个灰阶画面(例如，255灰阶画面)；其次，使用例如工业级相机CCD(Charge Coupled Device)拍摄显示器件的屏幕，以获取显示器件中各个像素单元的实际亮度；然后，基于各个像素单元的实际亮度获取显示器件的波纹区域和非波纹区域；接着，通过迭代的方法对波纹区域的像素单元的灰阶电压进行调整和优化，以提升 显示面板的亮度均匀性和/或显示效果。
然而，本公开的发明人注意到，该波纹擦除方法补偿所需的时间较长且补偿效果存在一定限制，下面进行具体说明。
例如，可以通过以下的步骤对波纹区域的像素单元的灰阶电压进行调整和优化：首先，基于波纹区域中各个像素单元的实际亮度获取波纹区域的各个像素单元的伽马值；然后，获取各个像素单元预设的目标亮度；接着，计算为实现像素单元的预设的目标亮度而应当采用的补偿后的灰阶；第四，使得OLED显示面板显示上述通过计算得到的补偿后的灰阶(也即，将补偿后的灰阶提供给位于波纹区域的像素单元)，使用CCD获取显示器件中各个像素单元在补偿后的实际亮度，并判断是否满足补偿效果(波纹的程度是否小于预设阈值)。在判断满足补偿效果的情况下，则结束计算过程；在不满足补偿效果的情况下，则使用显示器件中各个像素单元在补偿后的实际亮度重复以上的步骤，直至满足补偿效果或者达到最高的迭代次数。
上述波纹擦除方法通常需要多次迭代才能获取满足补偿效果的灰阶，但是在某些情况下，甚至多次迭代之后依然无法获取满足补偿效果的灰阶。因此，上述波纹擦除方法所需的补偿时间较长且补偿效果有限。
此外，本公开的发明人又注意到，在显示面板的像素单元的亮度越低的情况下，像素单元的亮度偏差变化的幅度越大(也即，波纹的变化幅度越大)，这进一步地增加了上述波纹擦除方法所需的补偿时间，并进一步地降低了上述波纹擦除方法的补偿效果。
本公开的一些实施例提供了一种像素单元的显示调试方法、像素单元的补偿方法、像素单元的补偿参数获取方法、显示面板的显示调试方法、显示面板的显示调试装置、显示补偿装置、显示装置以及存储介质。该像素单元的显示调试方法包括：选择调试灰阶向量，在该步骤中，调试灰阶向量包括N+1个调试灰阶数据；分别获取像素单元在显示N+1个调试灰阶数据时的N+1个亮度数据；基于N+1个亮度数据获取像素单元的N阶补偿关系式，在该步骤中，N阶补偿关系式包括N+1个参数，N为大于等于2的整数。
在一些示例中，通过使得N阶补偿关系式为二阶补偿关系式或者二阶以上的补偿关系式，相比于采用一阶补偿关系式，可以提升像素单元以及包括该像素单元的显示面板和显示装置的补偿效果。
在一些示例中，通过在执行像素单元的显示调试方法或显示面板的显示 调试方法中选用优化后的调试灰阶向量，可以降低调试像素单元或显示面板所需的时间和运算量，由此使得可以应用二阶补偿关系式或者二阶以上的补偿关系式对像素单元或显示面板进行补偿。
下面通过几个示例对根据本公开的一些实施例提供的像素单元的显示调试方法、像素单元的补偿方法、像素单元的补偿参数获取方法、显示面板的显示调试方法、显示面板的显示调试装置、显示补偿装置、显示装置以及存储介质进行非限制性的说明，如下面所描述的，在不相互抵触的情况下这些具体示例中不同特征可以相互组合，从而得到新的示例，这些新的示例也都属于本公开保护的范围。
本公开的实施例的涉及光学补偿系统，该光学补偿系统的一个示例如图1所示。图1所示的硬件环境和结构只是示例性的而非限制性的；根据需要，硬件环境也可以具有其他组件和结构，并且例如可以包括图像处理集成器等。
例如，如图1所示，该光学补偿系统涉及被检测的OLED显示面板201和光学补偿设备202，该光学补偿设备202包括：摄像头2021、数据处理单元2022和控制单元2023，摄像头2021、数据处理单元2022和控制单元2023之间通过有线或无线方式进行信号传递(连接)。
OLED显示面板除了像素阵列之外可以包括数据解码电路、时序控制器(Tcon)、栅极驱动电路、数据驱动电路、存储装置(例如闪存等)等。数据解码电路接收显示输入信号并对其进行解码以得到显示数据信号；时序控制器输出时序信号以控制栅极驱动电路、数据驱动电路等同步工作，且可以对显示数据信号进行伽马处理，将处理后的显示数据信号输入到数据驱动电路以进行显示操作。例如，时序控制器在显示数据信号进行伽马处理处理时，还可以同时进行补偿处理，例如从存储装置中读出预存的像素补偿参数，并采用该像素补偿参数对显示数据信号进一步处理以得到补偿后的显示数据信号，在完成了伽马处理以及补偿处理之后，再将显示数据信号输出到数据驱动电路以用于显示操作。或者，显示面板也可以包括独立的伽马处理电路，其在时序控制器的控制下对显示数据信号进行伽马处理以及进行补偿处理等。
图2A是本公开的至少一个实施例提供的像素单元的显示调试方法的示例性流程图。例如，该像素单元例如为显示面板中存在显示偏差(例如，亮度偏差)的任一像素单元，该像素单元呈现的实际亮度偏离该像素单元的理 论亮度(或者目标亮度)，例如该像素单元可以属于波纹点或波纹块。例如，上述显示面板可以为OLED显示面板。
如图2A所示，该像素单元的显示调试方法包括以下的步骤S110-步骤S130。
步骤S110：选择调试灰阶向量，其中，调试灰阶向量包括N+1个调试灰阶数据，N为大于等于2的整数。
步骤S120：分别获取像素单元在显示N+1个调试灰阶数据时的N+1个亮度数据。
步骤S130：基于N+1个亮度数据获取像素单元的N阶补偿关系式。
例如，步骤S110、步骤S120和步骤S130可以被顺次执行。
例如，可以在显示面板出厂前使用该像素单元的显示调试方法对显示面板中存在显示偏差的每个像素单元进行调试，并获取每个像素单元的N阶补偿关系式，该N阶补偿关系式可以保存在显示面板中，由此使得在显示面板出厂并交付给用户之后，用户在使用显示面板显示图像时，可以基于使用像素单元的显示调试方法获取的N阶补偿关系式，对提供给对应的像素单元的显示数据进行校正(例如，灰阶校正)，由此可以提高像素单元的亮度准确度，提高应用包括该像素单元的显示面板的亮度均匀性和/或显示效果。
此处，灰阶是用于体现显示画面的亮度等级的参数，即用于体现显示面面的亮度等级(从最暗的亮度等级到最亮的亮度等级)。灰阶可以由灰阶数据的比特数决定，并且，灰阶可以决定显示画面的颜色的细腻程度。例如，在灰阶数据为6比特的情况下，则有64灰阶；在灰阶数据为8比特的情况下，则有256灰阶；在灰阶数据为10比特的情况下，则有1024灰阶。例如，上述调试灰阶数据的比特数可以根据实际应用设定，以使得像素单元和包括该显示单元的显示面板能够显示预定级数的灰度。
在一些示例中，通过使得N为大于等于2的整数，可以提升基于像素单元的显示调试方法获得的N阶补偿关系式对像素单元以及包括该像素单元的显示面板的补偿效果。
例如，N可以等于2，此种情况下，可以平衡应用该N阶补偿关系式对像素单元以及包括该像素单元的显示面板进行补偿的运算量以及补偿效果。例如，在N等于2的情况下，调试灰阶向量X包括3个调试灰阶数据，也即，X＝[g1，g2，g3]。
例如，选择调试灰阶向量的具体方法可以根据实际应用需求进行选择，本公开的实施例对此不做具体限定。
在一个示例中，在执行像素单元的显示调试方法中选择的调试灰阶向量是优化后的调试灰阶向量(例如，最优的调试灰阶向量)；此种情况下，可以通过在执行像素单元的显示调试方法中利用优化后的调试灰阶向量降低调试像素单元以及包括该像素单元的显示面板所需的时间和运算量，由此使得可以应用二阶补偿关系式或者二阶以上的补偿关系式对像素单元和显示面板进行补偿。例如，可以在执行像素单元的显示调试方法之前，利用像素单元的补偿参数获取方法确定优化后的调试灰阶向量，并将调试灰阶向量(例如，优化后的调试灰阶向量)存储在存储器中，由此可以在执行像素单元的显示调试方法中直接调用调试灰阶向量(例如，优化后的调试灰阶向量)。例如，获取优化后的调试灰阶向量的方法将在下面的像素单元的补偿参数获取方法的实施例中详述，在此不再赘述。
例如，可以通过对例如多个显示面板(大量的显示面板，例如，100个显示面板)进行测试，并利用像素单元的补偿参数获取方法确定调试灰阶向量，此种情况下，利用像素单元的补偿参数获取方法确定的调试灰阶向量(也即，在执行像素单元的显示调试方法中选择的调试灰阶向量)是优化后的调试灰阶向量(例如，最优的调试灰阶向量)。因此，在使用该优化后的调试灰阶向量执行像素单元的显示调试方法的情况下，可以更快的获取满足补偿需求的N阶补偿关系式，由此可以降低执行像素单元的显示调试方法所需的时间，提升像素单元的调试效率以及包括该像素单元的显示面板的调试效率。
在另一个示例中，在执行像素单元的显示调试方法中选择的调试灰阶向量还可以是初始调试灰阶向量(也即，未经优化的调试灰阶向量)；此种情况下，在执行步骤S110之后且在执行步骤S120之前，像素单元的显示调试方法还可以包括下述的步骤S140。
步骤S140：基于初始调试灰阶向量获取优化的调试灰阶向量，并基于优化的调试灰阶向量执行步骤S120和步骤S130。
例如，可以利用像素单元的补偿参数获取方法基于初始调试灰阶向量(例如，作为像素单元的补偿参数获取方法中的测试灰阶向量)获取优化的调试灰阶向量，像素单元的补偿参数获取方法将在像素单元的补偿参数获取方法的实施例中详述，在此不再赘述。
例如，在步骤S110中，选择调试灰阶向量可以包括以下的步骤S111和步骤S112。例如，步骤S111和步骤S112可以顺次执行。
步骤S111：将像素单元能够显示的灰阶范围划分从小到大的N+1个灰阶区。
步骤S112：从每个灰阶区选取一个灰阶值以形成调试灰阶向量。
例如，通过将素单元能够显示的灰阶范围划分从小到大的N+1个灰阶区，并且从每个灰阶区选取一个灰阶值以形成调试灰阶向量，可以在执行像素单元的补偿参数获取方法中加快优化调试灰阶向量的速度，由此可以更快的获取一个优化后的调试灰阶向量。
例如，将素单元能够显示的灰阶范围划分从小到大的N+1个灰阶区包括：将素单元能够显示的灰阶范围划分N+1个灰阶区，且使得第m个灰阶区中最大的灰阶值小于第m+1个灰阶区中最小的灰阶值，m为大于等于1小于等于N的整数。
例如，从小到大的N+1个灰阶区是指N+1个灰阶区中的灰阶值由小到大。例如，N等于2的情况下，可以将素单元能够显示的灰阶范围划分第一灰阶区、第二灰阶区和第三灰阶区，第一灰阶区中的所有灰阶值均小于第二灰阶区中的所有灰阶值，以及第二灰阶区中的所有灰阶值均小于第三灰阶区中的所有灰阶值。
例如，N+1个灰阶区的范围逐渐增大。例如，第m+1个灰阶区的范围大于第m个灰阶区的范围。例如，在素单元能够显示的灰阶范围为0-255灰阶(此处，0灰阶表示像素单元的亮度最小，255灰阶表示像素单元的亮度最大)的情况下，第一灰阶区的灰阶范围为0-31灰阶，第二灰阶区的灰阶范围为32-127灰阶，第三灰阶区的灰阶范围为128-255灰阶。例如，通过使得N+1个灰阶区的范围逐渐增大，可以进一步地提升调试灰阶向量的优化速度，也即，可以更快的获得一个优化后的调试灰阶向量，且利用该优化后的调试灰阶向量获取的N阶补偿关系式不仅对高亮度水平下的波纹具有良好的补偿效果，而且对低亮度水平下的波纹也具有良好的补偿效果。
例如，在步骤S112中，在第一灰阶区的灰阶范围为0-31灰阶，第二灰阶区的灰阶范围为32-127灰阶，第三灰阶区的灰阶范围为128-255灰阶的情况下，可以从第一灰阶区选择15作为调试灰阶数据(也即，使得g1＝15)，从第二灰阶区选择64作为调试灰阶数据(也即，使得g2＝64)，从第三灰阶区选择 200作为调试灰阶数据(也即，使得g3＝200)，由此可以获取调试灰阶向量X＝[15，64，200]。
在一个示例中，通过步骤S112获取的调试灰阶数据可以直接用于执行步骤S120和步骤S130。在另一个示例中，通过步骤S112获取的调试灰阶数据(例如，作为像素单元的补偿参数获取方法中的测试灰阶向量)可以用于获取优化的调试灰阶向量，然后可以基于优化的调试灰阶向量执行步骤S120和步骤S130。
例如，在步骤S120中，可以通过光学方法获取N+1个亮度数据。例如，在像素单元(或包括该像素单元的显示面板)顺次显示上述N+1个调试灰阶数据的情况下，可以使用图像采集装置顺次拍摄像素单元，以获取像素单元在显示上述N+1个调试灰阶数据的情况下，像素单元的N+1的亮度数据。例如，在像素单元显示的调试灰阶数据为g1的情况下，图像采集装置可以拍摄像素单元并获取第一图像，然后可以基于第一图像获取像素单元在显示调试灰阶数据g1的情况下像素单元的亮度数据Lum_test_1；基于类似的方法，还可以获得像素单元在显示调试灰阶数据g2的情况下像素单元的亮度数据Lum_test_2，以及像素单元在显示调试灰阶数据g3的情况下像素单元的亮度数据Lum_test_3。
例如，该图像采集装置可以具有较高的精度，以提升亮度数据的准确度，降低获取N阶补偿关系式的时间以及采用该N阶补偿关系式进行补偿的像素单元和显示面板的补偿效果。例如，该图像采集装置还可以具有较高的分辨率，以使得可以对小尺寸的像素单元或者高分辨率的显示面板中的像素单元应用上述的像素单元的显示调试方法。
例如，该图像采集装置可以为工业级摄像头(或相机)。例如，该图像采集装置可以实现为CCD(电荷耦合器件)型摄像头(或相机)、CMOS(互补金属氧化物半导体)型摄像头(或相机)或者其它适用类型的摄像头(或相机)。
例如，在步骤S130中，N阶补偿关系式具有一个未知数，N+1参数，且未知数项的最高次数是N。
例如，在步骤S130中，基于N+1个亮度数据获取像素单元的N阶补偿关系式包括以下的步骤S131、步骤S132和步骤S133。
步骤S131：基于N+1个亮度数据分别获取N+1个等效灰阶数据。
步骤S132：基于N+1个亮度数据和N+1个调试灰阶数据分别获取N+1个校正后的灰阶数据。
步骤S133：基于N+1个等效灰阶数据和N+1个校正后的灰阶数据确定N+1个参数的值，由此确定N阶补偿关系式。
例如，步骤S131、步骤S132和步骤S133可以被顺次执行。又例如，可以顺次执行步骤S132、步骤S131和步骤S133。再例如，可以顺次执行步骤S131+步骤S132(也即，同时执行步骤S131+步骤S132)和步骤S133。
例如，在步骤S131中，可以利用以下的表达式并基于N+1个亮度数据分别获取N+1个等效灰阶数据：
Figure PCTCN2020076978-appb-000005
此处，γ为灰阶与透射率关系曲线的指数(即伽马值，为位于2-2.4的常数)；Lum_test为N+1个亮度数据之一，例如，Lum_test可以为对应于调试灰阶数据g1的亮度数据Lum_test_1，对应于调试灰阶数据g2的亮度数据Lum_test_2或者对应于调试灰阶数据g3的亮度数据Lum_test_3；G_eff为N+1个等效灰阶数据之一，例如，G_eff为对应于调试灰阶数据g1和亮度数据Lum_test_1的等效灰阶数据G_eff_1，对应于调试灰阶数据g2和亮度数据Lum_test_2的等效灰阶数据G_eff_2或者对应于调试灰阶数据g3和亮度数据Lum_test_3的等效灰阶数据G_eff_3。
例如，在步骤S132中，基于N+1个亮度数据和N+1个调试灰阶数据分别获取N+1个校正后的灰阶数据包括以下的步骤S1321-步骤S1323。
步骤S1321：基于N+1个调试灰阶数据获取N+1个理论亮度数据。
步骤S1322：基于N+1个亮度数据和N+1个理论亮度数据确定N+1个比例系数数据。
步骤S1323：基于N+1个比例系数数据和N+1个调试灰阶数据获取N+1个校正后的灰阶数据。
例如，步骤S1321、步骤S1322和步骤S1323可以被顺次执行。
在步骤S1321中，可以利用以下的表达式并基于N+1个调试灰阶数据获取N+1个理论亮度数据：
Figure PCTCN2020076978-appb-000006
此处，g为N+1个调试灰阶数据之一，例如，调试灰阶数据可以为g1、 g2或者g3；G_max为像素单元能够显示的最大灰阶，例如，在像素单元能够显示的灰阶范围为0-255灰阶的情况下，G_max＝255；Lum_theo为N+1个理论亮度数据之一，例如，Lum_theo可以为对应于调试灰阶数据g1的理论亮度数据Lum_theo_1，对应于调试灰阶数据g2的理论亮度数据Lum_theo_2以及对应于调试灰阶数据g3的理论亮度数据Lum_theo_3；Lum_max为像素单元在像素单元能够显示的最大灰阶下的亮度，例如，Lum_max可以为像素单元在255灰阶下的亮度(例如，理论亮度)。
例如，在步骤S1322中，可以基于以下的表达式并基于N+1个亮度数据和N+1个理论亮度数据确定N+1个比例系数数据：
Figure PCTCN2020076978-appb-000007
此处，Ra为N+1个比例系数数据之一，例如，Ra可以为基于理论亮度数据Lum_theo_1和亮度数据Lum_test_1获得的比例系数数据Ra_1，基于理论亮度数据Lum_theo_2和亮度数据Lum_test_2获得的比例系数数据Ra_2，或者基于理论亮度数据Lum_theo_3和亮度数据Lum_test_3获得的比例系数数据Ra_3。
例如，在步骤S1323中，可以利用以下的表达式并基于N+1个比例系数数据和N+1个调试灰阶数据获取N+1个校正后的灰阶数据：
Figure PCTCN2020076978-appb-000008
此处，G_corre为N+1个校正后的灰阶数据之一，例如，G_corre可以为基于比例系数数据Ra_1和调试灰阶数据g1获取的校正后的灰阶数据G_corre_1，基于比例系数数据Ra_2和调试灰阶数据g2获取的校正后的灰阶数据G_corre_2，或者基于比例系数数据Ra_3和调试灰阶数据g3获取的校正后的灰阶数据G_corre_3。
例如，在步骤S133中，可以基于N+1个等效灰阶数据和N+1个校正后的灰阶数据确定N+1个参数的值(例如，用于构建N阶补偿关系式的N+1个参数的值)，由此确定N阶补偿关系式。
下面以N等于2为例对确定N+1个参数的值的具体方法做示例性说明。
例如，在N等于2的情况下，N阶补偿关系式为以下的表达式(1)：
y＝a×x 2+b×x+c，          (1)
此处，参数a、b和c为N+1个参数。
例如，基于N+1个等效灰阶数据和N+1个校正后的灰阶数据确定N阶补偿关系式包括以下的步骤S1331和步骤S1332。例如，步骤S1331和步骤S1332可以被顺次执行。
步骤S1331：使得表达式(1)中的x分别等于N+1个等效灰阶数据，且使得表达式(1)中的y分别等于对应的N+1个校正后的灰阶数据，由此得到N+1个方程式。
步骤S1332：基于N+1个方程式确定N+1个参数的值(也即，参数a、参数b和参数c)。
例如，在步骤S1331中，可以获得以下的3个方程式，这3个方程式构成一个未知数为a、b和c的三元一次方程组：
G_corre_1＝a×(G_eff_1) 2+b×G_eff_1+c
G_corre_2＝a×(G_eff_2) 2+b×G_eff_2+c。
G_corre_3＝a×(G_eff_3) 2+b×G_eff_3+c
例如，在步骤S1332中，可以通过求解上述三元一次方程组可以确定参数a、参数b和参数c。
例如，可以将上述的N阶补偿关系式(包括参数a、参数b和参数c)存储在存储器(例如，包括该像素单元的显示面板或显示装置的存储器，例如闪存)中，由此在像素单元进行显示中，可以使用上述的N阶补偿关系式对像素单元的待显示的数据信号进行补偿或校正(例如，灰阶校正)，以获取补偿后的数据信号；然后，可以使用补偿后的数据信号(或校正后的数据信号)驱动像素单元进行显示。由此可以提高应用了上述像素单元的显示调试方法的像素单元的亮度准确度，提高应用了上述像素单元的显示调试方法的显示面板的亮度均匀性和/或显示效果。
本公开的至少一个实施例还提供了一种像素单元的补偿参数获取方法。该像素单元的补偿参数获取方法可通过对测试灰阶向量进行优化得到优化后的调试灰阶向量。
图2B是本公开的至少一个实施例提供的像素单元的补偿参数获取方法的一种示例性流程图。如图2B所示，该像素单元的补偿参数获取方法包括以下的步骤S210-步骤S240。例如，步骤S210、步骤S220、步骤S230和步骤S240可以被顺次执行。
步骤S210：选择测试灰阶向量。
例如，在步骤S210中，测试灰阶向量包括N+1个测试灰阶数据，且选择 测试灰阶向量可以包括以下的步骤S211和步骤S212。
步骤S211：将像素单元能够显示的灰阶范围划分从小到大的N+1个灰阶区。
步骤S212：从每个灰阶区选取一个灰阶值以形成测试灰阶向量。
例如，通过将素单元能够显示的灰阶范围划分从小到大的N+1个灰阶区，并且从每个灰阶区选取一个灰阶值(作为一个测试灰阶数据值)以形成测试灰阶向量，可以加快测试灰阶向量的优化速度，并可以更快的获取优化后的调试灰阶向量。
在一个示范性示例中，N+1个灰阶区的范围逐渐增大。例如，在将素单元能够显示的灰阶范围为0-255灰阶(0灰阶表示像素单元的亮度最小，255灰阶表示像素单元的亮度最大)的情况下，第一灰阶区的灰阶范围为0-31灰阶，第二灰阶区的灰阶范围为32-127灰阶，第三灰阶区的灰阶范围为128-255灰阶。例如，通过使得N+1个灰阶区的范围逐渐增大，可以更快的获得优化后的调试灰阶向量，且基于该优化后的调试灰阶向量获得的N阶补偿关系式不仅对高亮度水平下的波纹具有良好的补偿效果，而且对低亮度水平下的波纹具有良好的补偿效果。
步骤S220：基于测试灰阶向量获取像素单元的N阶补偿关系式。
例如，在步骤S220中，基于测试灰阶向量获取N阶补偿关系式包括以下的步骤S221-步骤S224。
步骤S221：分别获取像素单元在显示N+1个测试灰阶数据时的N+1个亮度数据。
步骤S222：基于N+1个亮度数据分别获取N+1个等效灰阶数据。
步骤S223：基于N+1个亮度数据和N+1个测试灰阶数据分别获取N+1个校正后的灰阶数据。
步骤S224：基于N+1个等效灰阶数据和N+1个校正后的灰阶数据确定N+1个参数的值，由此确定N阶补偿关系式。
例如，步骤S221、步骤S222、步骤S223和步骤S224的具体实施方式和技术效果可分别参见步骤S120、步骤S131、步骤S132和步骤S133，在此不再赘述。
例如，步骤S221、步骤S222、步骤S223和步骤S224可以顺次执行；又例如，步骤S222、步骤S221、步骤S223和步骤S224可以顺次执行。再例如， 步骤S221、步骤S223、步骤S222和步骤S224可以顺次执行。
步骤S230：基于N阶补偿关系式对像素单元的灰阶进行校正，并评估N阶补偿关系式的校正效果。
例如，可以针对单个显示面板执行步骤S230；又例如，还可以针对多个显示面板执行步骤S230，以提升优化后的测试灰阶数据(或者，优化后的调试灰阶数据)的普适性。例如，该多个显示面板具有相同的产品参数(例如，尺寸、物理分辨率等)，可以属于同一批次或属于不同的批次。
例如，在步骤S230中，基于N阶补偿关系式对像素单元的灰阶进行校正，并评估N阶补偿关系式的校正效果包括以下的步骤S231-步骤S234。例如，步骤S231、步骤S232、步骤S233和步骤S234可以被顺次执行。
步骤S231：使用N阶补偿关系式对像素单元的待显示的数据信号进行补偿，以获取补偿后的数据信号。
步骤S232：使用补偿后的数据信号驱动像素单元进行显示。
步骤S233：获得像素单元在显示补偿后的数据信号时的当前亮度数据(例如，也可以被称为像素单元的当前亮度数据)。在步骤S233中，例如，可以使用图像采集装置拍摄像素单元来获得像素单元的当前亮度数据；又例如，还可以通过数据接收的方式获得像素单元的当前亮度数据。
步骤S234：对比像素单元的当前亮度数据与像素单元的理论亮度数据，以判定N阶补偿关系式的校正效果是否满足校正需求。
例如，在步骤S234中，可以在像素单元的当前亮度数据与像素单元的理论亮度数据的差值小于亮度阈值的情况下，判定校正效果满足校正需求；在像素单元的当前亮度数据与像素单元的理论亮度数据的差值大于等于亮度阈值的情况下，判定校正效果不满足校正需求。例如，亮度阈值可以根据用户需求，行业标准或者补偿前后的差异情况进行设定，本公开的实施例对此不做具体限定。例如，亮度阈值可以为理论亮度数据的1％-10％(例如，5％、10％)或其它适用的数值。
步骤S240：在校正效果满足校正需求的情况下，将测试灰阶向量作为调试灰阶向量；在校正效果不满足校正需求的情况下，调整测试灰阶向量直至基于测试灰阶向量获取的N阶补偿关系式使得对像素单元的灰阶校正的校正效果满足校正需求。
图3是本公开的至少一个实施例提供的像素单元的补偿参数获取方法的 另一种示例性流程图。
如图3所示，在判定校正效果不满足校正需求的情况下，可以顺次执行以下的步骤。首先，基于步骤S210所述的方法选择(例如，随机选择或根据经验设定)一个新的测试灰阶向量。其次，基于该新的测试灰阶向量执行步骤S220-步骤S230，以获取新的N阶补偿关系式，并评估新的N阶补偿关系式的校正效果，也即，判定上述新的N阶补偿关系式是否满足校正需求。在判定上述新的N阶补偿关系式的校正效果满足校正需求的情况下，可以将新的测试灰阶向量作为调试灰阶向量，并结束测试灰阶向量的优化过程以及像素单元的补偿参数获取方法；在校正效果不满足校正需求的情况下，并进一步调整测试灰阶向量直至基于测试灰阶向量获取的N阶补偿关系式使得对像素单元的灰阶校正的校正效果满足校正需求。
在一个示范性的示例中，在判定校正效果不满足校正需求的情况下，还可以判定新的N阶补偿关系式的校正效果是否优于截止目前最优的补偿效果，如果新的N阶补偿关系式的校正效果优于截止目前最优的补偿效果，则记录上述新的测试灰阶向量，由此可以保证随机寻优算法的渐进性，从而使得可以逐步逼近最优解(最优的测试灰阶向量或调试灰阶向量)。
在另一个示范性的示例中，在判定校正效果不满足校正需求的情况下，还可以判定新的N阶补偿关系式的校正效果是否优于截止目前次优的补偿效果(次优的补偿效果为除最优的补偿效果之外的最优的补偿效果)，如果新的N阶补偿关系式的校正效果优于截止目前次优的补偿效果，则记录上述新的测试灰阶向量，此种情况下，可以记录更多的具有良好补偿效果的测试灰阶向量。
本公开的至少一个实施例还提供了一种显示面板的显示调试方法，显示面板包括多个像素单元。图4是本公开的至少一个实施例提供的显示面板的显示调试方法的示意性流程图。
如图4所示，该显示面板的显示调试方法包括以下的步骤S310和步骤S320。例如，步骤S310和步骤S320可以被顺次执行。
步骤S310：确定显示面板中存在显示偏差的像素单元。
步骤S320：针对存在显示偏差的像素单元的每个应用本公开的至少一个实施例提供的像素单元的显示调试方法，以针对存在显示偏差的像素单元的每个获取N阶补偿关系式。
例如，在步骤S310中，确定显示面板中存在显示偏差的像素单元包括以下的步骤S311-步骤S314。
步骤S311：选择调试灰阶向量。例如，选择调试灰阶向量的具体方法可以参见步骤S110，在此不再赘述。
步骤S312：分别获取显示面板的各个像素单元在显示N+1个调试灰阶数据时的N+1个亮度矩阵。
步骤S313：基于N+1个调试灰阶数据获取N+1个理论亮度矩阵。
步骤S314：基于N+1个亮度矩阵、N+1个理论亮度矩阵以及波纹判定阈值确定显示面板中存在显示偏差的像素单元。
例如，步骤S311-步骤S314可以被顺次执行。又例如，步骤S311、步骤S312+步骤S313(步骤S312和步骤S313同时执行)和步骤S314可以被顺次执行。
例如，在步骤S311中，调试灰阶向量包括N+1个调试灰阶数据。N为大于等于2的整数。
在一个示范性的示例中，在步骤S312中，可以通过光学方法获取N+1个亮度矩阵。首先，使得显示面板显示灰阶数据为g1，并使用图像采集装置对显示面板进行拍照，以记录下显示面板的亮度矩阵LUM_test_1；然后，使得显示面板显示灰阶数据为g2，并使用图像采集装置对显示面板进行拍照，以记录下显示面板的亮度矩阵LUM_test_2；接着，使得显示面板显示灰阶数据为g3，并使用图像采集装置对显示面板进行拍照，以记录下显示面板的亮度矩阵LUM_test_3。例如，LUM_test为N+1个亮度矩阵之一，LUM_test可以为亮度矩阵LUM_test_1、亮度矩阵LUM_test_2或亮度矩阵LUM_test_3。例如，在显示面板包括m行n列像素单元的情况下，亮度矩阵LUM_test包括m行n列，也即，亮度矩阵LUM_test的尺寸(或维度)为m×n。
在另一个示范性的示例中，还可以通过接收或读取的方式获取显示面板的各个像素单元在显示N+1个调试灰阶数据时的N+1个亮度矩阵。
在步骤S313中：可以利用以下的表达式并基于N+1个调试灰阶数据获取N+1个理论亮度矩阵：
Figure PCTCN2020076978-appb-000009
此处，g为N+1个调试灰阶数据之一，例如，调试灰阶数据可以为g1、g2或者g3；G_max为像素单元能够显示的最大灰阶，例如，在像素单元能够 显示的灰阶范围为0-255灰阶的情况下，G_max＝255；LUM_theo为N+1个理论亮度矩阵之一，例如，LUM_theo可以为对应于调试灰阶数据g1的理论亮度矩阵LUM_theo_1，对应于调试灰阶数据g2的理论亮度数据LUM_theo_2或者对应于调试灰阶数据g3的理论亮度数据LUM_theo_3。例如，LUM_max可以为显示面板在显示面板能够显示的最大灰阶(例如，255灰阶)下的亮度矩阵(例如，理论亮度矩阵)。例如，在显示面板包括m行n列像素单元的情况下，矩阵LUM_max的尺寸为m×n。
在步骤S314中，在位于显示面板的第i行第j列的像素单元同时满足以下的波纹判定表达式的情况下，可以判定该像素单元为显示面板中存在显示偏差的像素单元：
|LUM_test_1(i,j)/LUM_theo_1(i,j)|≥Lth1
|LUM_test_2(i,j)/LUM_theo_2(i,j)|≥Lth2。
|LUM_test_3(i,j)/LUM_theo_3(i,j)|≥Lth3
此处，LUM_test_1(i，j)、LUM_test_2(i，j)和LUM_test_3(i，j)分别为位于显示面板的第i行第j列的像素单元在显示灰阶数据g1、g2和g3情况下的亮度数据；LUM_theo_1(i，j)、LUM_theo_2(i，j)和LUM_theo_3(i，j)分别为位于显示面板的第i行第j列的像素单元对应于调试灰阶数据g1、g2和g3的理论亮度数据；Lth1、Lth2和Lth3分别为对应于调试灰阶数据g1、g2和g3的波纹判定阈值。
在一个示例中，波纹判定阈值Lth1、Lth2和Lth3可以彼此相等(例如，均等于Lth)。例如，波纹判定阈值Lth1、Lth2和Lth3可以根据用户对波纹的容忍度进行设定。例如，在用户对波纹的容忍度较低的情况下，可以使得波纹判定阈值较小(0.001)；在用户对波纹的容忍度较高的情况下，可以使得波纹判定阈值较大(0.01)。又例如，对于不同颜色的像素单元，可以设定不同的波纹判定阈值Lth1、Lth2和Lth3。
在另一个示例中，还可以使得Lth1<Lth2<Lth3，此种情况下，还可以使得显示面板在低亮度水平下的波纹较弱，由此可以使得应用了本公开的至少一个实施例提供的显示面板的显示调试方法显示面板对低亮度水平下的波纹具有良好的补偿效果。
例如，可以使用上述的波纹判定表达式判定显示面板的任一像素单元是否为存在显示偏差的像素单元。例如，为减小运算量以及节省运算时间，可以利用矩阵运算同时获取显示面板中存在显示偏差的像素单元。例如，可以 通过获取以下矩阵运算表达式中的非零元素在矩阵中的位置确定显示面板中存在显示偏差的像素单元：
|LUM_test_1./LUM_theo_1|≥L_TH。
例如，在确定显示面板中存在显示偏差的像素单元(所有存在显示偏差的像素单元)之后，可以利用步骤S320针对存在显示偏差的像素单元的每个获取N阶补偿关系式；在针对存在显示偏差的像素单元的每个获取N阶补偿关系式之后，则可完成的显示面板的显示调试方法。
例如，在针对存在显示偏差的像素单元的每个应用本公开的至少一个实施例提供的像素单元的显示调试方法中，可以省略一些步骤，并可以利用步骤S310中的相关子步骤获取被省略的步骤可以获取的信息。例如，可以无需执行步骤S110和步骤S120，而是利用步骤S311和步骤S312获取调试灰阶向量和像素单元在显示N+1个调试灰阶数据时的N+1个亮度数据。
图5示出了本公开的至少一个实施例提供的显示面板的显示调试方法的一个示例。下面结合图5对本公开的至少一个实施例提供的显示面板的显示调试方法做示例性说明。例如，该显示面板的显示调试方法的一个示例包括以下的步骤S410-步骤S470以及步骤S490。
步骤S410：将显示面板能够显示的灰阶范围划分为N+1个(这里为三个)灰阶区。
例如，在步骤S410中，可以将显示面板能够显示的灰阶范围划分为第一灰阶区(灰阶范围为0-31灰阶)、第二灰阶区(灰阶范围为32-127灰阶)和第三灰阶区(灰阶范围为128-255灰阶)。
步骤S420：从N+1个灰阶区分别随机选取一个调试灰阶数据，以形成调试灰阶向量。
例如，在步骤S420中，基于从第一灰阶区选取调试灰阶数据g1(26)，从第二灰阶区选取调试灰阶数据g2(108)和从第三灰阶区选取调试灰阶数据g3(207)，并形成调试灰阶向量X＝[26，108，207]。
步骤S430：分别获取显示面板显示N+1个调试灰阶数据时的N+1个亮度矩阵。
在一个示范性示例中，步骤S430可以包括以下的步骤。首先，使得显示面板显示灰阶数据g1(26)，并使用CCD相机对显示面板进行拍照，以记录下显示面板的亮度矩阵LUM_test_1；然后，使得显示面板显示灰阶数据g2 (108)，并使用CCD相机对显示面板进行拍照，以记录下显示面板的亮度矩阵LUM_test_2；接着，使得显示面板显示灰阶数据g3(207)，并使用CCD相机对显示面板进行拍照，以记录下显示面板的亮度矩阵LUM_test_3。
在另一个示范性示例中，步骤S430还可以包括接收或读取显示面板显示N+1个调试灰阶数据时的N+1个亮度矩阵。
步骤S440：基于N+1个调试灰阶数据获取N+1个理论亮度矩阵。
例如，在步骤S440中，可以利用以下的表达式，并基于N+1个调试灰阶数据获取N+1个理论亮度矩阵：
Figure PCTCN2020076978-appb-000010
此处，g为N+1个调试灰阶数据之一，例如，调试灰阶数据可以为g1、g2或者g3；G_max为像素单元能够显示的最大灰阶；LUM_theo为N+1个理论亮度矩阵之一；LUM_max为显示面板在显示面板能够显示的最大灰阶下的亮度矩阵。例如，LUM_theo可以为对应于调试灰阶数据g1的理论亮度矩阵LUM_theo_1，对应于调试灰阶数据g2的理论亮度数据LUM_theo_2或者对应于调试灰阶数据g3的理论亮度数据LUM_theo_3。
步骤S450：确定显示面板中存在显示偏差的像素单元。
例如，在步骤S450中，可以基于N+1个亮度矩阵、N+1个理论亮度矩阵以及波纹判定阈值确定显示面板中存在显示偏差的像素单元，并因此可以将显示面板划分为波纹区和非波纹区。
例如，可以基于前述的波纹判定表达式确定显示面板中存在显示偏差的像素单元(所有存在显示偏差的像素单元)，具体确定方法请参见图3所示的实施例，在此不再赘述。
步骤S460：获取N+1个波纹区亮度矩阵和N+1个波纹区理论亮度矩阵。
例如，在步骤S460中，可以基于显示面板中存在显示偏差的像素单元所在的位置、N+1个显示面板的亮度矩阵以及N+1个理论亮度矩阵获取N+1个波纹区亮度矩阵和N+1个波纹区理论亮度矩阵。
例如，可以通过将N+1个显示面板的亮度矩阵中对应于不存在亮度偏差的像素单元的矩阵元素赋值为零的方法获取N+1个波纹区亮度矩阵，并可以通过将N+1个理论亮度矩阵中对应于不存在亮度偏差的像素单元的矩阵元素赋值为零的方法获取N+1个波纹区理论亮度矩阵。
步骤S470：获取显示面板的每个存在显示偏差的像素单元的N阶补偿关 系式。
例如，在步骤S470中，可以基于N+1个波纹区亮度矩阵和N+1个波纹区理论亮度矩阵获取显示面板的每个存在显示偏差的像素单元的N阶补偿关系式。
例如，步骤S470可以包括以下的步骤S471-步骤S473。
步骤S471：基于N+1个波纹区亮度矩阵分别获取N+1个波纹区等效灰阶矩阵。
步骤S472：基于N+1个波纹区亮度矩阵和N+1个调试灰阶数据分别获取N+1个校正后的波纹区灰阶矩阵。
步骤S473：基于N+1个波纹区等效灰阶矩阵和N+1个校正后的波纹区灰阶矩阵确定每个存在显示偏差的像素单元的N+1个参数的值，由此确定每个存在显示偏差的像素单元的N阶补偿关系式。
例如，步骤S471-步骤S473可以顺次执行。
例如，在步骤S471中，可以利用以下的表达式基于N+1个波纹区亮度矩阵分别获取N+1个波纹区等效灰阶矩阵：
Figure PCTCN2020076978-appb-000011
此处，γ为灰阶与透射率关系曲线的指数(即伽马值，通常为位于2-2.4的常数)；LUM_test_mura为N+1个显示面板的波纹区亮度矩阵之一；例如，LUM_test_mura可以为对应于调试灰阶数据g1的波纹区亮度矩阵LUM_test_mura_1，对应于调试灰阶数据g2的波纹区亮度矩阵LUM_test_mura_2或者对应于调试灰阶数据g3的波纹区亮度矩阵LUM_test_mura_3；G_eff_mura为N+1个波纹区等效灰阶矩阵之一，例如，波纹区等效灰阶矩阵为对应于调试灰阶数据g1和波纹区亮度矩阵LUM_test_mura_1的波纹区等效灰阶数据G_eff_mura_1，对应于调试灰阶数据g2和波纹区亮度矩阵LUM_test_mura_2的波纹区等效灰阶矩阵G_eff_mura_2或者对应于调试灰阶数据g3和波纹区亮度矩阵LUM_test_mura_3的波纹区等效灰阶矩阵G_eff_mura_3。
例如，步骤S472包括以下的步骤S4721-步骤S4722。
步骤S4721：基于N+1个波纹区亮度矩阵和N+1个波纹区理论亮度数据确定N+1个波纹区比例系数矩阵。
步骤S4722：基于N+1个波纹区比例系数矩阵和N+1个调试灰阶数据获 取N+1个校正后的波纹区灰阶矩阵。
例如，步骤S4721和步骤S4722可以顺次执行。
例如，在步骤S4721中，可以利用以下的表达式并基于N+1个波纹区亮度矩阵和N+1个波纹区理论亮度数据确定N+1个波纹区比例系数矩阵：
Ra_mura＝LUM_theo_mura./LUM_test_mura。
此处，Ra_mura为N+1个波纹区比例系数矩阵之一，例如，Ra_mura可以为基于波纹区理论亮度数据Lum_theo_mura_1和波纹区亮度数据Lum_test_mura_1获得的波纹区比例系数矩阵Ra_mura_1，基于波纹区理论亮度数据Lum_theo_mura_2和波纹区亮度数据Lum_test_mura_2获得的波纹区比例系数矩阵Ra_mura_2，或者基于波纹区理论亮度数据Lum_theo_mura_3和波纹区亮度数据Lum_test_mura_3获得的波纹区比例系数矩阵Ra_mura_3。
在步骤S4722中，可以利用以下的表达式并基于N+1个波纹区比例系数矩阵和N+1个调试灰阶数据获取N+1个校正后的波纹区灰阶矩阵：
Figure PCTCN2020076978-appb-000012
此处，G_corre_mura为N+1个校正后的波纹区灰阶矩阵之一，例如，G_corre_mura可以为基于比例系数矩阵Ra_mura__1和调试灰阶数据g1获取的校正后的波纹区灰阶矩阵G_corre_mura_1，基于比例系数矩阵Ra_mura__2和调试灰阶数据g2获取的校正后的波纹区灰阶矩阵G_corre_mura_2，或者基于比例系数矩阵Ra_mura__3和调试灰阶数据g3获取的校正后的波纹区灰阶矩阵G_corre_mura_3。
例如，在步骤S473中，可以基于N+1个波纹区等效灰阶矩阵和N+1个校正后的波纹区灰阶矩阵确定每个存在显示偏差的像素单元的N+1个参数的值，由此可以确定显示面板中每个存在显示偏差的像素单元的N阶补偿关系式。
下面以N等于2为例对确定显示面板中每个存在显示偏差的像素单元的N+1个参数的值的具体方法做示例性说明。
例如，在N等于2的情况下，显示面板中每个存在显示偏差的像素单元的N阶补偿关系式为以下的表达式：
y_mura＝a_mura.*(x_mura) 2+b_mura.*x_mura+c_mura。
此处，参数矩阵a_mura、参数矩阵b_mura和参数矩阵c_mura为N+1个参数矩阵，且参数矩阵a_mura、参数矩阵b_mura和参数矩阵c_mura的尺寸 均为m×n。
例如，基于N+1个等效灰阶数据和N+1个校正后的灰阶数据确定N阶补偿关系式包括以下的步骤S4731和步骤S4732。
例如，步骤S4731和步骤S4732可以顺次执行。
步骤S4731：使得表达式(1)中的x_mura分别等于N+1个波纹区等效灰阶矩阵，且使得表达式(1)中的y_mura分别等于N+1个校正后的波纹区灰阶矩阵，由此得到N+1个方程式。
步骤S4732：基于N+1个方程式确定参数矩阵a_mura、参数矩阵b_mura和参数矩阵c_mura。
例如，在步骤S4731中，可以获得以下的3个方程式构成的三元一次矩阵方程组：
G_corre_mura_1＝a_mura.*(G_eff_mura_1) 2+b_mura.*G_eff_mura_1+c_mura
G_corre_mura_2＝a_mura.*(G_eff_mura_2) 2+b_mura.*G_eff_mura_2+c_mura。
G_corre_mura_3＝a_mura.*G_eff_mura_3) 2+b_mura.*G_eff_mura_3+c_mura
例如，在步骤S4732中，可以利用求解矩阵方程组来确定参数矩阵a_mura、参数矩阵b_mura和参数矩阵c_mura。
例如，如图5所示，在步骤S420中选取的调试灰阶向量X＝[g1，g2，g3]为优化后的调试灰阶向量(例如，最优的调试灰阶向量)的情况下，使用步骤S473获取的N阶补偿关系式具有良好的补偿效果，因此，可以直接执行步骤S490，也即，记录显示面板的每个存在显示偏差的像素单元的N阶补偿关系式。
例如，可以将上述的N阶补偿关系式(包括参数矩阵a_mura、b_mura和c_mura。)存储在存储器(例如，显示面板或显示装置的存储器)中，由此在显示面板进行显示中，可以使用上述的N阶补偿关系式对显示面板的待显示的数据信号(提供给显示面板的存在显示偏差的像素单元的待显示的数据信号)进行补偿或校正(例如，灰阶校正)，以获取补偿后的数据信号；然后可以使用补偿后的数据信号(或校正后的数据信号)驱动显示面板的存在显示偏差的像素单元进行显示，并使用未经补偿的数据信号驱动显示面板的不存在显示偏差的像素单元进行显示。由此可以提高应用了上述显示面板的显示调试方法的显示面板的亮度均匀性和/或显示效果。
例如，在步骤S420中选取的调试灰阶向量X＝[g1，g2，g3]并非优化后的调试灰阶向量(例如，最优的调试灰阶向量)的情况下，该显示面板的显示 调试方法的一个示例还包括以下的步骤S480。
步骤S480：基于显示面板的每个存在显示偏差的像素单元的N阶补偿关系式对对应的像素单元的灰阶进行校正，并评估校正效果。
例如，步骤S480的具体实施方法可以参见步骤S230，在此不再赘述。
在执行步骤S480之后，可以在校正效果满足校正需求的情况下，记录显示面板的每个存在显示偏差的像素单元的N阶补偿关系式；在校正效果不满足校正需求的情况下，调整调试灰阶向量，并再次执行步骤S420-步骤S480，直至使得灰阶校正的校正效果满足校正需求。
在一个示范性示例中，步骤S410-步骤S470可以顺次执行。在另一个示范性示例中，步骤S440还可以在步骤S430之后执行。
下面以显示面板的像素单元A存在显示偏差且γ＝2.2为例做具体说明。
例如，在像素单元A显示调试灰阶数据g1(也即，显示26灰阶画面)时，基于CCD拍摄的图像可以获得像素单元A的对应于调试灰阶数据g1的亮度数据Lum_test_1＝18尼特，由此可以得到对应于调试灰阶数据g1和亮度数据Lum_test_1的等效灰阶数据G_eff_1＝23。例如，对应于调试灰阶数据g1的理论亮度数据Lum_theo_1＝20尼特。
例如，基于理论亮度数据Lum_theo_1和亮度数据Lum_test_1获得的比例系数数据Ra_1:
Ra_1＝Lum_theo_1/Lum_test_1。
例如，利用以下的表达式，并基于比例系数数据Ra_1、G_max、g1和γ可以获得校正后的灰阶数据G_corre_1：
Figure PCTCN2020076978-appb-000013
例如，基于类似的方法可以获得调试灰阶数据g2(也即，显示108灰阶画面)对应的等效灰阶数据G_eff_2和校正后的灰阶数据G_corre_2分别为99和120，并且可以获得调试灰阶数据g3(也即，显示207灰阶画面)对应的等效灰阶数据G_eff_3和校正后的灰阶数据G_corre_3分别为189和234。
例如，可以基于G_eff_1(23)、G_corre_1(29)、G_eff_2(99)、G_corre_2(120)、G_eff_3(189)和G_corre_3(234)并利用以下的表达式获取对应于像素单元A参数a_A、b_A和c_A：
G_corre_1＝a_A×(G_eff_1) 2+b_A×G_eff_1+c_A
G_corre_2＝a_A×(G_eff_2) 2+b_A×G_eff_2+c_A。
G_corre_3＝a_A×(G_eff_3) 2+b_A×G_eff_3+c_A
例如，通过求解三元二次方程可以确定参数a_A＝0.000417，参数b_A＝1.15和参数c_A＝2.41，因此，可以得到像素单元A的N阶补偿关系式为以下的表达式：
y＝0.000417x 2+1.15x+2.41。
例如，利用类似的方法，可以获得显示面板中其它存在显示偏差的像素单元的N阶补偿关系式，在此不再赘述。
本公开的至少一个实施例还提供了一种显示面板的显示调试装置。图6示出了本公开的至少一个实施例提供的一种显示面板的显示调试装置的示例性框图。如图6所示，该显示面板的显示调试装置包括处理器和存储器。例如，处理器和存储器可以通过总线系统连接，总线系统例如可以是串行、并行通信总线等，本公开的实施例对此不作具体限定。
例如，存储器中存储有计算机程序指令，计算机程序指令被处理器运行时执行以下步骤：确定显示面板中存在显示偏差的像素单元；针对存在显示偏差的像素单元的每个应用本公开任一实施例提供的像素单元的显示调试方法，以针对存在显示偏差的像素单元的每个获取N阶补偿关系式。
例如，确定显示面板中存在显示偏差的像素单元的具体实施方法可以参考步骤S310，针对存在显示偏差的像素单元的每个获取N阶补偿关系式的具体实施方法可以参考步骤S320，在此不再赘述。
图6所述的处理器以及本公开的其它示例中采用的处理器例如是中央处理单元(CPU)或者具有数据处理能力和/或指令执行能力的其它形式的处理单元，例如，该处理器可以实现为通用处理器，并且也为单片机、微处理器、数字信号处理器、专用的图像处理芯片、或现场可编程逻辑阵列等。存储器例如可以包括易失性存储器和/或非易失性存储器，例如可以包括只读存储器(ROM)、硬盘、闪存等。相应地，该存储器可以实现为一个或多个计算机程序产品，所述计算机程序产品可以包括各种形式的计算机可读存储介质，在所述计算机可读存储介质上可以存储一个或多个计算机程序指令。处理器可以运行所述程序指令，以确定显示面板中存在显示偏差的像素单元以及针对存在显示偏差的像素单元的每个获取N阶补偿关系式。该存储器还可以存储其他各种应用程序和各种数据，例如N+1个调试灰阶数据等，以及所述应用 程序使用和/或产生的各种数据等。
在一个示例中，显示面板的显示调试装置还包括图像采集装置；在另一个示例中，显示面板的显示调试装置不包括图像采集装置，此种情况下，可以接收由图像采集装置提供的亮度矩阵。
本公开的至少一个实施例还提供了一种存储介质。图7示出了本公开的至少一个实施例提供的一种存储介质200的示例性框图，如图7所示，该存储介质200存储有计算机程序指令，计算机程序指令被处理器运行时执行以下步骤：选择调试灰阶向量，在该步骤中，调试灰阶向量包括N+1个调试灰阶数据；分别获取像素单元在显示N+1个调试灰阶数据时的N+1个亮度数据；基于N+1个亮度数据获取像素单元的N阶补偿关系式，N阶补偿关系式包括N+1个参数，在该步骤中，N为大于等于2的整数。
例如，选择调试灰阶向量，获取像素单元在显示N+1个调试灰阶数据时的N+1个亮度数据以及基于N+1个亮度数据获取像素单元的N阶补偿关系式的具体实现方法可以参见步骤S110、步骤S120和步骤S130，在此不再赘述。
图7所示的存储介质200以及本公开的实施例提供的其它存储介质可以包括各种形式的计算机可读存储介质(例如，非暂时性计算机可读存储介质)，例如易失性存储器和/或非易失性存储器。易失性存储器例如可以包括随机存取存储器(RAM)和/或高速缓冲存储器(cache)等。非易失性存储器例如可以包括磁性存储介质、光存储介质、半导体存储介质，例如只读存储器(ROM)、硬盘、闪存等。
在一些示例中，利用图7所示的存储介质200可以获取像素单元的N阶补偿关系式，由此在包括该像素单元的显示面板显示图像时，可以基于该N阶补偿关系式对提供给该像素单元的显示数据进行校正(例如，灰阶校正)，由此可以提高使用上述像素单元的显示调试方法的像素单元的亮度准确度，提高使用上述像素单元的显示调试方法的显示面板的亮度均匀性和/或显示效果。
本公开的至少一个实施例还提供了一种存储介质。图8示出了本公开的至少一个实施例提供的另一种存储介质300的示例性框图，如图8所示，该存储介质300存储有计算机程序指令，计算机程序指令被处理器运行时执行以下步骤：确定显示面板中存在显示偏差的像素单元；针对存在显示偏差的像素单元的每个应用本公开任一实施例提供的像素单元的显示调试方法，以 针对存在显示偏差的像素单元的每个获取N阶补偿关系式。
例如，确定显示面板中存在显示偏差的像素单元的具体实施方法可以参考步骤S310，针对存在显示偏差的像素单元的每个获取N阶补偿关系式的具体实施方法可以参考步骤S320，在此不再赘述。
在一些示例中，利用图8所示的存储介质300可以针对存在显示偏差的像素单元的每个获取N阶补偿关系式，由此可以基于这些N阶补偿关系式对显示面板的待显示的数据信号(提供给显示面板的存在显示偏差的像素单元的待显示的数据信号)进行补偿或校正(例如，灰阶校正)，以获取补偿后的数据信号；然后可以使用补偿后的数据信号(或校正后的数据信号)驱动显示面板的存在显示偏差的像素单元进行显示，并使用未经补偿的数据信号驱动显示面板的未存在显示偏差的像素单元进行显示。由此可以提高应用了上述显示面板的显示调试方法的显示面板的亮度均匀性和/或显示效果。
本公开的至少一个实施例还提供了一种像素单元的补偿方法。图9示出了本公开的至少一个实施例提供的像素单元的补偿方法的示例性流程图。如图9所示，该像素单元的补偿方法包括以下的步骤510-步骤530。
步骤510：获取像素单元的待显示的数据信号。
步骤520：采用基于本公开任一实施例提供的像素单元的显示调试方法获得的N阶补偿关系式对待显示的数据信号进行补偿，以获取补偿后的数据信号。
步骤530：将补偿后的数据信号提供给像素单元，以使得可使用补偿后的数据信号驱动像素单元进行显示。
例如，在步骤510，像素单元为显示面板中任一存在显示偏差的像素单元。
例如，在步骤520中，可以基于存在显示偏差的像素单元的待显示的数据信号以及以下的表达式获取补偿后的数据信号：
y＝a×x 2+b×x+c。
例如，可以使得x等于待显示的数据信号，并将使用以上的表达式获取的y作为补偿后的数据信号。
在一些示例中，可以利用本公开的至少一个实施例提供的像素单元的补偿方法针对存在显示偏差的像素单元获取补偿后的数据信号(也即，对数据信号进行校正)，由此可以提升应用了上述像素单元的补偿方法的像素单元在显示中的亮度准确度，提高包括了上述像素单元的显示面板的亮度均匀性和/ 或显示效果。
本公开的至少一个实施例还提供了一种显示面板的补偿方法。图10示出了本公开的至少一个实施例提供的显示面板的补偿方法的示例性流程图。如图10所示，该显示面板的补偿方法包括以下的步骤610-步骤630。
步骤610：获取显示面板中存在显示偏差的像素单元的待显示的数据信号。
步骤620：采用基于本公开任一实施例提供的显示面板的显示调试方法针对存在显示偏差的像素单元的每个获取的N阶补偿关系式对待显示的数据信号进行补偿，以获取补偿后的数据信号。
步骤630：将补偿后的数据信号提供给显示面板中存在显示偏差的像素单元，以使得可使用补偿后的数据信号驱动显示面板中存在显示偏差的像素单元进行显示。
例如，在步骤620的具体实施方法可以参见步骤520，在此不再赘述。
在一些示例中，可以利用本公开的至少一个实施例提供的显示面板的补偿方法针对显示面板中存在显示偏差像素单元获取补偿后的数据信号(也即，对显示面板中存在显示偏差像素单元的数据信号进行校正)，由此可以提升应用了上述显示面板的补偿方法的显示面板的亮度均匀性和/或显示效果。
本公开的至少一个实施例还提供了一种显示补偿装置，该显示补偿装置用于驱动显示面板。
图11示出了本公开的至少一个实施例提供的显示补偿装置400的示例性框图，如图11所示，该显示补偿装置400包括处理器和存储器，存储器中存储有计算机程序指令以及基于本公开任一实施例提供的像素单元的显示调试方法获得的N阶补偿关系式，计算机程序指令被处理器运行时执行以下步骤：获取显示面板的存在显示偏差的像素单元的待显示的数据信号；采用N阶补偿关系式对待显示的数据信号进行补偿，以获取补偿后的数据信号；将补偿后的数据信号提供给像素单元，以使得可使用补偿后的数据信号驱动像素单元进行显示。
在一些示例中，该显示补偿装置可用于针对显示面板的存在显示偏差的像素单元获取补偿后的数据信号，由此该显示补偿装置可以提升与该显示补偿装置配合使用的显示面板的亮度均匀性和/或显示效果。
本公开至少一个实施例还提供一种显示装置，其包括显示面板以及本公 开任一实施例提供的显示补偿装置，该显示装置可以实现为有机发光二级管显示装置。
图12为本公开至少一个实施例提供的显示装置的示意框图。如图12所示，显示装置500包括显示补偿装置以及显示面板504。例如，该显示补偿装置可以为显示补偿装置400。
例如，显示面板504包括多个阵列排布的像素单元，例如，每个像素单元包括发光元件(例如，OLED)以及被配置为驱动该发光元件发光的驱动电路。驱动电路至少包括驱动晶体管和开关晶体管。
如图12所示，该显示装置还可以包括控制器501、数据驱动器502和栅极驱动器503，控制器501包括时序控制器T-con和上述的显示补偿装置。在一些示例中，显示补偿装置可设置在时序控制器T-con中。
例如，时序控制器被配置为：接收从显示装置500的外部输入的图像数据RGB，对外部输入的图像数据RGB进行处理以使得处理后的图像数据匹配显示面板的大小和分辨率，将处理后的图像数据(待显示的数据信号或者初始数据信号)提供给显示补偿装置。
例如，时序控制器还用于向栅极驱动器503和数据驱动器502分别输出栅极扫描控制信号GCS(Gate Control Signal)和数据控制信号DCS(Data Control Signal)，以分别控制栅极驱动器503和数据驱动器502。
例如，显示补偿装置被配置为：获取显示面板的像素单元的待显示的数据信号；采用N阶补偿关系式(例如，存储在存储器中的N阶补偿关系式)对待显示的数据信号(例如，用于驱动存在显示偏差的像素单元的待显示的数据信号)进行补偿，以获取补偿后的数据信号；将补偿后的数据信号提供给(在时序控制器的控制下)显示面板的像素单元(显示面板中存在显示偏差的像素单元)，以使得可使用补偿后的数据信号驱动显示面板的像素单元进行显示。例如，显示补偿装置提供的补偿后的数据信号可经由数据驱动器502提供给显示面板的像素单元，也即，显示补偿装置提供的补偿后的数据信号可首先提供给数据驱动器502，然后在数据驱动器502中进行相关处理之后提供给显示面板的像素单元。
例如，该栅极驱动器503被配置为通过多条栅线与开关晶体管连接，并被配置为向开关晶体管提供栅极扫描信号，从而控制开关晶体管的导通状态(导通或截止)。
例如，该数据驱动器502被配置为接收显示补偿装置输出的补偿后的数据信号，然后将补偿后的数据信号提供给显示面板504。该补偿后的数据信号例如为补偿后的像素电压，并被配置为控制位于相应的像素单元中的发光元件，以使其在显示操作中呈现一定的灰阶。补偿后的像素电压越高则代表灰阶越大，由此使得发光元件发射的光线的强度越大。
例如，数据驱动器502可以包括数字驱动器或者模拟驱动器。模拟驱动器被配置为接收模拟信号，然后将该模拟信号经由薄膜晶体管提供给显示面板的像素单元；数字驱动器被配置为接收数字信号，利用D/A(数/模)转换和伽马校正将该数字信号转换为模拟信号，以及经由薄膜晶体管将通过转换获得的模拟信号提供给显示面板的像素单元。
在一个示范性的示例中，栅极驱动器503和数据驱动器502可以实现为集成电路芯片，并通过邦定连接至显示面板504；在另一个示范性的示例中，还可以通过半导体制备工艺将栅极驱动器503和数据驱动器502直接制备在显示面板504的周边区域。
在一些示例中，通过在显示装置中设置显示补偿装置，并使用显示补偿装置提供的补偿后的数据信号驱动显示面板504，可以提升显示面板的亮度均匀性和/或显示效果。
有以下几点需要说明。
(1)本公开的实施例的N不限于等于2，根据实际应用需求，本公开的实施例的N还可以等于3、4或者其它适用数值。
(2)本公开的实施例的像素单元能够显示的最大灰阶不限于等于255灰阶，根据实际应用需求，本公开的实施例的像素单元能够显示的最大灰阶还可以等于64、1024或者其它适用数值。
(3)本公开的实施例提供的像素单元的显示调试方法、像素单元的补偿方法、像素单元的补偿参数获取方法、显示面板的显示调试方法、显示面板的显示调试装置、显示补偿装置和存储介质不限于应用于有机发光二级管显示装置(和/或显示面板)中，根据实际应用需求，其还可以应用于无机发光二级管显示装置(和/或显示面板)、液晶显示装置(和/或显示面板)中。
虽然上文中已经用一般性说明及具体实施方式，对本公开作了详尽的描述，但在本公开实施例基础上，可以对之作一些修改或改进，这对本领域技术人员而言是显而易见的。因此，在不偏离本公开精神的基础上所做的这些 修改或改进，均属于本公开要求保护的范围。
以上所述仅是本公开的示范性实施方式，而非用于限制本公开的保护范围，本公开的保护范围由所附的权利要求确定。

Claims (18)

  1. 一种像素单元的显示调试方法，包括：
    选择调试灰阶向量，其中，所述调试灰阶向量包括N+1个调试灰阶数据；
    分别获取所述像素单元在显示所述N+1个调试灰阶数据时的N+1个亮度数据；以及
    基于所述N+1个亮度数据获取所述像素单元的N阶补偿关系式，其中，所述N阶补偿关系式包括N+1个参数，N为大于等于2的整数。
  2. 根据权利要求1所述的显示调试方法，其中，所述像素单元存在显示偏差。
  3. 根据权利要求1或2所述的显示调试方法，其中，所述N+1个亮度数据通过光学方法获取。
  4. 根据权利要求1-3任一项所述的显示调试方法，其中，基于所述N+1个亮度数据获取所述像素单元的N阶补偿关系式包括：
    基于所述N+1个亮度数据分别获取N+1个等效灰阶数据；
    基于所述N+1个亮度数据和所述N+1个调试灰阶数据分别获取N+1个校正后的灰阶数据；以及
    基于所述N+1个等效灰阶数据和所述N+1个校正后的灰阶数据确定所述N+1个参数的值，由此确定所述N阶补偿关系式。
  5. 根据权利要求4所述的显示调试方法，其中，所述N等于2，所述N阶补偿关系式为以下的表达式(1)：
    y＝a×x 2+b×x+c，  (1)
    其中，参数a、b和c为所述N+1个参数；
    基于所述N+1个等效灰阶数据和所述N+1个校正后的灰阶数据确定所述N阶补偿关系式包括：
    在所述表达式(1)使得x分别等于所述N+1个等效灰阶数据，且使得y分别等于所述N+1个校正后的灰阶数据，由此得到N+1个方程式；以及
    基于所述N+1个方程式确定所述参数a、所述参数b和所述参数c。
  6. 根据权利要求4或5所述的显示调试方法，其中，基于所述N+1个亮度数据和所述N+1个调试灰阶数据分别获取所述N+1个校正后的灰阶数据包 括：
    基于所述N+1个调试灰阶数据获取N+1个理论亮度数据；
    基于所述N+1个亮度数据和所述N+1个理论亮度数据确定N+1个比例系数数据；以及
    基于所述N+1个比例系数数据和所述N+1个调试灰阶数据获取所述N+1个校正后的灰阶数据。
  7. 根据权利要求6所述的显示调试方法，其中，所述N+1个理论亮度数据、所述N+1个比例系数数据、所述N+1个校正后的灰阶数据以及N+1个等效灰阶数据分别采用下述的表达式(2)-(5)获取：
    Figure PCTCN2020076978-appb-100001
    Figure PCTCN2020076978-appb-100002
    Figure PCTCN2020076978-appb-100003
    Figure PCTCN2020076978-appb-100004
    其中，Lum_theo为所述N+1个理论亮度数据之一，
    Ra为所述N+1个比例系数数据之一，
    G_corre为所述N+1个校正后的灰阶数据之一，
    G_eff为所述N+1个等效灰阶数据之一，
    g为所述N+1个调试灰阶数据之一，
    Lum_test为所述N+1个亮度数据之一，
    γ为位于2-2.4的常数，
    G_max为所述像素单元能够显示的最大灰阶，
    Lum_max为所述像素单元在所述最大灰阶下的亮度。
  8. 根据权利要求1-7任一所述的显示调试方法，其中，选择所述调试灰阶向量包括：
    将所述像素单元能够显示的灰阶范围划分从小到大的N+1个灰阶区；以及
    从每个所述灰阶区选取一个灰阶值以形成所述调试灰阶向量。
  9. 根据权利要求8所述的显示调试方法，其中，所述N+1个灰阶区的范围逐渐增大。
  10. 一种显示面板的显示调试方法，所述显示面板包括多个像素单元， 所述显示面板的显示调试方法包括：
    确定所述显示面板中存在显示偏差的至少一个像素单元；以及
    针对所述存在显示偏差的至少一个像素单元的每个应用如权利要求1-9任一所述的像素单元的显示调试方法，以针对所述存在显示偏差的至少一个像素单元的每个获取所述N阶补偿关系式。
  11. 一种像素单元的补偿方法，包括：
    获取所述像素单元的待显示的数据信号；
    采用基于如权利要求1-9任一所述的像素单元的显示调试方法获得的所述N阶补偿关系式对所述待显示的数据信号进行补偿，以获取补偿后的数据信号；以及
    将所述补偿后的数据信号提供给所述像素单元，以使得可使用所述补偿后的数据信号驱动所述像素单元进行显示。
  12. 一种像素单元的补偿参数获取方法，包括：
    选择测试灰阶向量，其中，所述测试灰阶向量包括N+1个测试灰阶数据；
    基于所述测试灰阶向量获取所述像素单元的N阶补偿关系式；
    基于所述N阶补偿关系式对所述像素单元的灰阶进行校正，并评估校正效果；以及
    在所述校正效果满足校正需求的情况下，将所述测试灰阶向量作为调试灰阶向量，在所述校正效果不满足所述校正需求的情况下，调整所述测试灰阶向量直至所述N阶补偿关系式使得对所述像素单元的灰阶校正的校正效果满足校正需求。
  13. 根据权利要求12所述的补偿参数获取方法，其中，选择所述调试灰阶向量包括：
    将所述像素单元能够显示的灰阶范围划分从小到大的N+1个灰阶区；以及
    从每个所述灰阶区选取一个灰阶值以形成所述调试灰阶向量。
  14. 一种显示面板的显示调试装置，包括处理器和存储器，
    其中，所述存储器中存储有计算机程序指令，所述计算机程序指令被所述处理器运行时执行以下步骤：
    确定所述显示面板中存在显示偏差的像素单元；以及
    针对所述存在显示偏差的像素单元的每个应用如权利要求1-9任一所述 的像素单元的显示调试方法，以针对所述存在显示偏差的像素单元的每个获取所述N阶补偿关系式。
  15. 一种显示补偿装置，用于驱动显示面板，且包括处理器和存储器，
    其中，所述存储器中存储有计算机程序指令以及基于如权利要求1-9任一所述的像素单元的显示调试方法获得的所述N阶补偿关系式，所述计算机程序指令被所述处理器运行时执行以下步骤：
    获取所述显示面板的存在显示偏差的像素单元的待显示的数据信号；
    采用所述N阶补偿关系式对所述待显示的数据信号进行补偿，以获取补偿后的数据信号；以及
    将所述补偿后的数据信号提供给所述像素单元，以使得可使用所述补偿后的数据信号驱动所述像素单元进行显示。
  16. 一种显示装置，包括：显示面板以及如权利要求15所述的显示补偿装置。
  17. 一种存储介质，包括存储在所述存储介质上的计算机程序指令，
    其中，所述计算机程序指令被处理器运行时执行以下步骤：
    选择调试灰阶向量，其中，所述调试灰阶向量包括N+1个调试灰阶数据；
    分别获取像素单元在显示所述N+1个调试灰阶数据时的N+1个亮度数据；以及
    基于所述N+1个亮度数据获取所述像素单元的N阶补偿关系式，所述N阶补偿关系式包括N+1个参数，其中，N为大于等于2的整数。
  18. 根据权利要求17所述的存储介质，其中，所述像素单元为显示面板的存在显示偏差的像素单元。
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