WO2020024475A1 - Oled发光补偿方法、装置、存储介质及显示装置 - Google Patents

Oled发光补偿方法、装置、存储介质及显示装置 Download PDF

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WO2020024475A1
WO2020024475A1 PCT/CN2018/114116 CN2018114116W WO2020024475A1 WO 2020024475 A1 WO2020024475 A1 WO 2020024475A1 CN 2018114116 W CN2018114116 W CN 2018114116W WO 2020024475 A1 WO2020024475 A1 WO 2020024475A1
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Prior art keywords
driving voltage
voltage value
values
target
brightness
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PCT/CN2018/114116
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English (en)
French (fr)
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颜伟男
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武汉华星光电半导体显示技术有限公司
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Priority to US16/325,404 priority Critical patent/US10861391B2/en
Publication of WO2020024475A1 publication Critical patent/WO2020024475A1/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]
    • G09G3/3225—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 an active matrix
    • G09G3/3258—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 an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • 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]
    • G09G3/3225—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 an active matrix
    • G09G3/3233—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 an active matrix with pixel circuitry controlling the current through the light-emitting element
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present application relates to the field of display, and in particular to a method, a device, a storage medium, and a display device for OLED light compensation.
  • AMOLED Active Matrix Organic Light Emitting Diode
  • LCD liquid crystal display
  • OLEDs have the advantages of high contrast, wide viewing angle, low power consumption, and thinner size.
  • Is expected to become the next generation of flat panel display technology is currently one of the most concerned technology in flat panel display technology.
  • AMOLED display technology still has obvious defects. Due to the unevenness of the panel production, the difference between each driving TFT and the device results in unevenness of the screen display. Although some compensation technologies have resolved the impact of Vth, the cost is that the complex compensation circuit reduces the pixel aperture ratio and has certain restrictions on the PPI; the evaporation process causes differences in characteristics between sub-pixels, such as the cross-voltage and Luminous efficiency is different. As shown in FIG. 2, due to the impedance of the current transmission path, there is a loss in the voltage during the transmission, and the current actually loaded across the OLED is less than ELVDD.
  • the purpose of the embodiments of the present application is to provide a method, a device, a storage medium, and a display device for OLED light compensation, which have the beneficial effect of improving display quality.
  • An embodiment of the present application provides an OLED light compensation method for compensating multiple pixel units of a display panel.
  • the method includes the following steps:
  • the step of obtaining the first brightness value of each pixel unit under a plurality of preset gray levels and the corresponding actual driving voltage value includes:
  • An actual driving voltage value of each of the pixel units is calculated according to the equivalent resistance value Ri and the initial driving voltage ELVDD.
  • the step of calculating an actual driving voltage value of each of the pixel units according to the equivalent resistance value Ri and the initial driving voltage ELVDD includes:
  • DATA is the grayscale voltage value under the same grayscale
  • L P and L Q are the brightness values
  • k is the luminous efficiency of the OLED device, where the equivalent resistance of the line between any two adjacent pixel units in each row
  • the values Ri are equal and both are R.
  • the step of mapping a brightness value and an actual driving voltage value established according to the plurality of first brightness values and the plurality of actual driving voltage values includes:
  • mapping relationship is L-Vt curve, wherein This C is a constant related to the carrier mobility and channel capacitance characteristics of the thin film transistor of the pixel unit.
  • the step of performing brightness compensation on the plurality of pixel units according to the target driving voltage value and the current actual driving voltage value of each pixel unit includes:
  • Each pixel unit is adjusted separately according to the current actual driving voltage value of each pixel unit, the target gray level voltage DATA 'and the target gray level g'.
  • An embodiment of the present application further provides an OLED light-emitting compensation method for compensating multiple pixel units of a display panel.
  • the method includes the following steps:
  • the step of obtaining the first brightness value of each pixel unit under a plurality of preset gray levels and the corresponding actual driving voltage value includes:
  • An actual driving voltage value of each of the pixel units is calculated according to the equivalent resistance value Ri and the initial driving voltage ELVDD.
  • the step of calculating an actual driving voltage value of each of the pixel units according to the equivalent resistance value Ri and the initial driving voltage ELVDD includes:
  • DATA is the grayscale voltage value under the same grayscale
  • L P and L Q are the brightness values
  • k is the luminous efficiency of the OLED device, where the equivalent resistance of the line between any two adjacent pixel units in each row
  • the values Ri are equal and both are R.
  • the step of mapping a brightness value and an actual driving voltage value established according to the plurality of first brightness values and the plurality of actual driving voltage values includes:
  • mapping relationship is L-Vt curve, wherein This C is a constant related to the carrier mobility and channel capacitance characteristics of the thin film transistor of the pixel unit.
  • the step of performing brightness compensation on the plurality of pixel units according to the target driving voltage value and the current actual driving voltage value of each pixel unit includes:
  • Each pixel unit is adjusted separately according to the current actual driving voltage value of each pixel unit, the target gray level voltage DATA 'and the target gray level g'.
  • An OLED light-emitting compensation device is used for compensating a plurality of pixel units of a display panel.
  • the device includes:
  • a first acquisition module configured to acquire a first brightness value of each pixel unit under a plurality of preset gray levels and a corresponding actual driving voltage value
  • a establishing module configured to map the brightness values and actual driving voltage values established according to the multiple first brightness values and the multiple actual driving voltage values
  • a calculation module configured to obtain target brightness values of the multiple pixel units, and calculate target drive voltage values of the multiple pixel units according to the mapping relationship and the target brightness values;
  • a compensation module is configured to perform brightness compensation on the plurality of pixel units according to the target driving voltage value and a current actual driving voltage value of each pixel unit.
  • the first acquisition module includes:
  • a first obtaining unit configured to obtain first brightness values of the detected plurality of pixel units under multiple preset grayscales
  • a second acquiring unit configured to acquire an equivalent line resistance value Ri between any two adjacent pixel units in each row under the first brightness value and an initial driving voltage ELVDD inputted from the head end of the row of pixel units;
  • a first calculation unit is configured to calculate an actual driving voltage value of each of the pixel units according to the equivalent resistance value Ri and the initial driving voltage ELVDD.
  • the calculation module is configured to calculate an actual driving voltage value Vti of each of the pixel units according to the following two formulas:
  • DATA is the grayscale voltage value under the same grayscale
  • L P and L Q are the brightness values
  • k is the luminous efficiency of the OLED device, where the equivalent resistance of the line between any two adjacent pixel units in each row
  • the values Ri are equal and both are R.
  • the step of mapping a brightness value and an actual driving voltage value established according to the plurality of first brightness values and the plurality of actual driving voltage values includes:
  • mapping relationship is L-Vt curve, wherein This C is a constant related to the carrier mobility and channel capacitance characteristics of the thin film transistor of the pixel unit.
  • the step of performing brightness compensation on the plurality of pixel units according to the target driving voltage value and the current actual driving voltage value of each pixel unit includes:
  • Each pixel unit is adjusted separately according to the current actual driving voltage value of each pixel unit, the target gray level voltage DATA 'and the target gray level g'.
  • a storage medium stores a computer program in the storage medium, and when the computer program runs on a computer, causes the computer to execute the method according to any one of the foregoing.
  • a display device includes a processor, a memory, and a display panel.
  • the memory stores a computer program, and the processor invokes the computer program stored in the memory to execute the computer program according to any one of the foregoing. method.
  • the present application obtains the first brightness value of each pixel unit under a plurality of preset gray levels and corresponding actual driving voltage values; the brightness values established based on the plurality of first brightness values and the plurality of actual driving voltage values and Mapping relationship of actual driving voltage values; obtaining target brightness values of the plurality of pixel units, and calculating target driving voltage values of the plurality of pixel units according to the mapping relationship and the target brightness value; according to the target
  • the driving voltage value and the current actual driving voltage value of each pixel unit perform brightness compensation on the plurality of pixel units; it has the beneficial effect of improving display quality and reducing color shift.
  • FIG. 1 is a flowchart of an OLED light emission compensation method according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a pixel driving equivalent circuit of a display panel of the present application.
  • FIG. 3 is an L-Vt curve diagram of the OLED light emission compensation method in the embodiment of the present application.
  • FIG. 4 is a structural diagram of an OLED light-emitting compensation device in an embodiment of the present application.
  • FIG. 5 is a structural diagram of a display device in an embodiment of the present application.
  • first and second are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless specifically defined otherwise.
  • the "first" or “under” of the second feature may include the first and second features in direct contact, and may also include the first and second features. Not directly, but through another characteristic contact between them.
  • the first feature is “above”, “above”, and “above” the second feature, including that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature is higher in level than the second feature.
  • the first feature is “below”, “below”, and “below” of the second feature, including the fact that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature is less horizontal than the second feature.
  • FIG. 1 is a flowchart of an OLED light compensation method according to an embodiment of the present application. The method is used to compensate multiple pixel units of a display panel. The method includes the following steps:
  • the first brightness value of each pixel unit of the display panel when the display panel emits light can be detected by a precise detection device.
  • the actual driving voltage value is calculated based on the equivalent resistance value Ri between any two adjacent pixel units passing through the pixel units of each row.
  • step S101 includes:
  • S1011 Obtain the detected first brightness values of the plurality of pixel units under multiple preset gray levels.
  • S1012, with reference to FIG. 2, obtain any two adjacent pixels in each row under the first brightness value.
  • S1013. Calculate the actual value of each pixel unit according to the equivalent resistance value Ri and the initial driving voltage ELVDD. Driving voltage value.
  • step S1013 the actual driving voltage value Vti of each of the pixel units may be calculated according to the following two formulas:
  • DATA is the grayscale voltage value under the same grayscale
  • L P and L Q are the brightness values
  • k is the luminous efficiency of the OLED device, where the equivalent resistance of the line between any two adjacent pixel units in each row
  • the values Ri are equal and both are R.
  • the mapping relationship is L- The Vt curve, where C is a constant related to the carrier mobility and channel capacitance characteristics of the thin film transistor of the pixel unit.
  • the target brightness value is the display brightness value required by the user. All pixel units have the same target brightness value. Before compensation, the actual driving voltage value of each pixel unit is not due to the resistance consumption between the pixel units. The same, so the brightness value of each pixel unit is also different.
  • S104 Perform brightness compensation on the plurality of pixel units according to the target driving voltage value and a current actual driving voltage value of each pixel unit.
  • the target gray level voltage DATA 'and the target gray level g' are obtained according to the target driving voltage value.
  • the target gray level voltage DATA 'and the target gray level g' are adjusted separately. Before the compensation, the actual driving voltage obtained by each pixel unit is different. Therefore, during compensation, the degree of compensation obtained according to the target driving voltage value is also different.
  • the present application obtains the first brightness value of each pixel unit under a plurality of preset gray levels and the corresponding actual driving voltage value; based on the plurality of first brightness values and the plurality of actual driving voltage values, A mapping relationship between the brightness value and the actual driving voltage value; obtaining a target brightness value of the plurality of pixel units, and calculating a target driving voltage value of the plurality of pixel units according to the mapping relationship and the target brightness value; Performing brightness compensation on the plurality of pixel units according to the target driving voltage value and the current actual driving voltage value of each pixel unit; it has the beneficial effect of improving display quality and reducing color shift.
  • FIG. 4 is a structural diagram of an OLED light-emitting compensation device according to an embodiment of the present application, and is configured to compensate a plurality of pixel units of a display panel.
  • the device includes: a first obtaining module 201, a establishing module 202, and a calculation unit. Module 203 and compensation module 204.
  • the first acquisition module 201 is configured to acquire the first brightness value of each pixel unit under multiple preset gray levels and the corresponding actual driving voltage value.
  • the first acquisition module 201 includes: A first acquisition unit is configured to acquire a first brightness value of the detected plurality of pixel units under a plurality of preset gray levels; a second acquisition unit is configured to acquire each line in the first brightness value The equivalent resistance value Ri of the line between any two adjacent pixel units and the initial driving voltage ELVDD input at the head of the pixel unit in the row; a first calculation unit, according to the equivalent resistance value Ri and the initial drive The voltage ELVDD calculates an actual driving voltage value of each of the pixel units.
  • the calculation module 203 is configured to obtain target brightness values of the multiple pixel units, and calculate target drive voltage values of the multiple pixel units according to the mapping relationship and the target brightness values. Specifically, the calculation module 203 is configured to calculate an actual driving voltage value Vti of each of the pixel units according to the following two formulas:
  • DATA is the grayscale voltage value under the same grayscale
  • L P and L Q are the brightness values
  • k is the luminous efficiency of the OLED device, where the equivalent resistance of the line between any two adjacent pixel units in each row
  • the values Ri are equal and both are R.
  • the target brightness value is the display brightness value required by the user. All pixel units have the same target brightness value. Before compensation, the actual driving voltage value of each pixel unit is different due to the resistance consumption between the pixel units. Cell brightness values are also different.
  • the compensation module 204 is configured to perform brightness compensation on the plurality of pixel units according to the target driving voltage value and a current actual driving voltage value of each pixel unit.
  • the compensation module 204 obtains the target gray level voltage DATA 'and the target gray level g' according to the target driving voltage value; according to the current actual driving voltage value of each pixel unit, the target gray level voltage DATA 'and the target gray level g' for each pixel Units are adjusted individually. Before the compensation, the actual driving voltage obtained by each pixel unit is different. Therefore, during compensation, the degree of compensation obtained according to the target driving voltage value is also different.
  • the present application obtains the first brightness value of each pixel unit under a plurality of preset gray levels and the corresponding actual driving voltage value; based on the plurality of first brightness values and the plurality of actual driving voltage values, A mapping relationship between the brightness value and the actual driving voltage value; obtaining a target brightness value of the plurality of pixel units, and calculating a target driving voltage value of the plurality of pixel units according to the mapping relationship and the target brightness value; Performing brightness compensation on the plurality of pixel units according to the target driving voltage value and the current actual driving voltage value of each pixel unit; it has the beneficial effect of improving display quality and reducing color shift.
  • the present application further provides a display device 300 including a processor 301 and a memory 302.
  • the memory 302 stores a computer program, and the processor 301 calls the computer stored in the memory.
  • the processor 301 and the memory 302 are electrically connected.
  • the processor 301 is the control center of the terminal 300. It uses various interfaces and lines to connect various parts of the entire terminal.
  • the processor executes the display device by running or calling a computer program stored in the memory 302 and calling data stored in the memory 302. Various functions and processing data to control the display.
  • the processor 301 in the display device 300 will load instructions corresponding to one or more computer program processes into the memory 302 according to the following steps, and the processor 301 will run and store the memory 302 Computer program in the computer to achieve various functions, for example: by obtaining the first brightness value of each pixel unit under a plurality of preset gray levels and corresponding actual driving voltage values; according to the plurality of first brightness values and the Mapping relationship between the brightness values established by the plurality of actual driving voltage values and the actual driving voltage value; obtaining a target brightness value of the plurality of pixel units, and calculating the plurality of pixels according to the mapping relationship and the target brightness value A target driving voltage value of the unit; performing brightness compensation on the plurality of pixel units according to the target driving voltage value and a current actual driving voltage value of each pixel unit.
  • the storage medium may include, but is not limited to, read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disks, or optical disks.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

本申请提供一种OLED发光补偿方法及装置，包括：获取多个第一亮度值及对应的实际驱动电压值；根据多个第一亮度值及实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；获取多个像素单元的目标亮度值，并根据映射关系及目标亮度值计算出目标驱动电压值；根据目标驱动电压值及当前的实际驱动电压值对像素单元进行亮度补偿。

Description

OLED发光补偿方法、装置、存储介质及显示装置 技术领域
本申请涉及显示领域，具体涉及一种OLED发光补偿方法、装置、存储介质及显示装置。
背景技术
AMOLED(有源矩阵有机发光二极体)是一种应用于电视和移动设备中的显示技术，相比现在的主流液晶显示器,OLED具有高对比度，广视角，低功耗，体积更薄等优点，有望成为下一代平板显示技术，是目前平板显示技术中最受关注的技术之一。
然而，AMOLED显示技术仍然有较明显的缺陷。由于面板制作不均匀，各个驱动TFT和器件差异，导致屏幕显示的不均匀性。尽管一些补偿技术解决了Vth的影响，但代价是复杂的补偿电路使像素开口率减小，对PPI也有一定限制；蒸镀制程导致各个sub-pixel间存在特性差异，如OLED间的跨压及发光效率不同。如图2所示，由于电流传输路径存在阻抗，导致电压在传输过程中存在损耗，而实际加载在OLED两端的电流小于ELVDD。这就使得ELVDD的亮度小于设定值，并且距PMIC越远，其ELVDD损耗约大，进而使亮度越低。这种现象被称为IR-drop。现有的解决方法是利用外部光学de-mura补偿可以使面板正常显示。但该方法无法有效地解决IR-drop造成的mura，导致补偿后的显示效果不理想，会出现离PMIC远的像素经补偿后亮度偏高的情况。
因此，现有技术存在缺陷，急需改进。
技术问题
本申请实施例的目的是提供一种OLED发光补偿方法、装置、存储介质及显示装置，具有提高显示质量的有益效果。
技术解决方案
本申请实施例提供了一种OLED发光补偿方法，用于对显示面板的多个像素单元进行补偿，该方法包括以下步骤：
通过检测装置检测所述显示面板以获取每一像素单元在多个预设灰阶下的 第一亮度值以及对应的实际驱动电压值；
根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；
获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的目标驱动电压值；
根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿。
在本申请所述的OLED发光补偿方法中，所述获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值的步骤包括：
获取检测到的所述多个像素单元在多个预设灰阶下的第一亮度值；
获取在该第一亮度值下的每一行内的任意相邻两个像素单元之间线路等效电阻值Ri以及该行像素单元首端输入的初始驱动电压ELVDD；
根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值。
在本申请所述的OLED发光补偿方法中，所述根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值的步骤包括：
根据以下两个公式计算每一所述像素单元的实际驱动电压值Vti：
Figure PCTCN2018114116-appb-000001
以及，
Figure PCTCN2018114116-appb-000002
其中，DATA为同一灰阶下的灰阶电压值，L P以及L Q分别为亮度值，k为OLED器件的发光效率，其中每行的任意相邻两个像素单元之间的线路等效电阻值Ri相等且均为R。
在本申请所述的OLED发光补偿方法中，所述根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系的步骤包括：
根据公式L i＝kC(V ti) 2以及该多个第一亮度值以及该多个实际驱动电压值建立亮度值与实际驱动电压值的映射关系，该映射关系为L-Vt曲线，其中，该 C与像素单元的薄膜晶体管的载流子迁移率、沟道电容特性相关的常数。
在本申请所述的OLED发光补偿方法中，所述根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿的步骤包括：
根据目标驱动电压值得到目标灰阶电压DATA’及目标灰阶g’；
根据每一像素单元当前的实际驱动电压值、目标灰阶电压DATA’及目标灰阶g’对每个像素单元进行分别调整。
本申请实施例还提供了一种OLED发光补偿方法，用于对显示面板的多个像素单元进行补偿，该方法包括以下步骤：
获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值；
根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；
获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的目标驱动电压值；
根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿。
在本申请所述的OLED发光补偿方法中，所述获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值的步骤包括：
获取检测到的所述多个像素单元在多个预设灰阶下的第一亮度值；
获取在该第一亮度值下的每一行内的任意相邻两个像素单元之间线路等效电阻值Ri以及该行像素单元首端输入的初始驱动电压ELVDD；
根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值。
在本申请所述的OLED发光补偿方法中，所述根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值的步骤包括：
根据以下两个公式计算每一所述像素单元的实际驱动电压值Vti：
Figure PCTCN2018114116-appb-000003
以及，
Figure PCTCN2018114116-appb-000004
其中，DATA为同一灰阶下的灰阶电压值，L P以及L Q分别为亮度值，k为OLED器件的发光效率，其中每行的任意相邻两个像素单元之间的线路等效电阻值Ri相等且均为R。
在本申请所述的OLED发光补偿方法中，所述根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系的步骤包括：
根据公式L i＝kC(V ti) 2以及该多个第一亮度值以及该多个实际驱动电压值建立亮度值与实际驱动电压值的映射关系，该映射关系为L-Vt曲线，其中，该C与像素单元的薄膜晶体管的载流子迁移率、沟道电容特性相关的常数。
在本申请所述的OLED发光补偿方法中，所述根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿的步骤包括：
根据目标驱动电压值得到目标灰阶电压DATA’及目标灰阶g’；
根据每一像素单元当前的实际驱动电压值、目标灰阶电压DATA’及目标灰阶g’对每个像素单元进行分别调整。
一种OLED发光补偿装置，用于对显示面板的多个像素单元进行补偿，该装置包括：
第一获取模块，用于获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值；
建立模块，用于根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；
计算模块，用于获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的目标驱动电压值；
补偿模块，用于根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿。
在本申请所述的OLED发光补偿装置中，所述第一获取模块包括：
第一获取单元，用于获取检测到的所述多个像素单元在多个预设灰阶下的 第一亮度值；
第二获取单元，用于获取在该第一亮度值下的每一行内的任意相邻两个像素单元之间线路等效电阻值Ri以及该行像素单元首端输入的初始驱动电压ELVDD；
第一计算单元，用于根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值。
在本申请所述的OLED发光补偿装置中，所述计算模块用于根据以下两个公式计算每一所述像素单元的实际驱动电压值Vti：
Figure PCTCN2018114116-appb-000005
以及，
Figure PCTCN2018114116-appb-000006
其中，DATA为同一灰阶下的灰阶电压值，L P以及L Q分别为亮度值，k为OLED器件的发光效率，其中每行的任意相邻两个像素单元之间的线路等效电阻值Ri相等且均为R。
在本申请所述的OLED发光补偿装置中，所述根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系的步骤包括：
根据公式L i＝kC(V ti) 2以及该多个第一亮度值以及该多个实际驱动电压值建立亮度值与实际驱动电压值的映射关系，该映射关系为L-Vt曲线，其中，该C与像素单元的薄膜晶体管的载流子迁移率、沟道电容特性相关的常数。
在本申请所述的OLED发光补偿装置中，所述根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿的步骤包括：
根据目标驱动电压值得到目标灰阶电压DATA’及目标灰阶g’；
根据每一像素单元当前的实际驱动电压值、目标灰阶电压DATA’及目标灰阶g’对每个像素单元进行分别调整。
一种存储介质，所述存储介质中存储有计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行上述任一项所述的方法。
一种显示装置，包括处理器、存储器以及显示面板，所述存储器中存储有计算机程序，所述处理器通过调用所述存储器中存储的所述计算机程序，用于执行上述任一项所述的方法。
有益效果
本申请通过获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值；根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的目标驱动电压值；根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿；具有提高显示品质，降低色偏的有益效果。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例中的OLED发光补偿方法的一种流程图。
图2为本申请显示面板的像素驱动的等效电路结构示意图。
图3为本申请实施例中的OLED发光补偿方法的L-Vt曲线图。
图4为本申请实施例中的OLED发光补偿装置的结构图。
图5为本申请实施例中的显示装置的结构图。
本发明的实施方式
下面详细描述本申请的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关 系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
请参阅图1，图1为本申请实施例中的OLED发光补偿方法的一种流程图，该方法用于对显示面板的多个像素单元进行补偿，该方法包括以下步骤：
S101、获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值。
在该步骤中，可以通过精密的检测装置来检测该显示面板在发光时的每一像素单元的第一亮度值。而该实际驱动电压值则根据通过每一行的像素单元的任意相邻两个像素单元之间的等效电阻值Ri来计算。
具体地，该步骤S101包括：
S1011、获取检测到的所述多个像素单元在多个预设灰阶下的第一亮度值；S1012、参照图2，获取在该第一亮度值下的每一行内的任意相邻两个像素单元之间线路等效电阻值Ri以及该行像素单元首端输入的初始驱动电压ELVDD；S1013、根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值。
其中，在该步骤S1013中，可以根据以下两个公式计算每一所述像素单元的实际驱动电压值Vti：
Figure PCTCN2018114116-appb-000007
以及，
Figure PCTCN2018114116-appb-000008
其中，DATA为同一灰阶下的灰阶电压值，L P以及L Q分别为亮度值，k为OLED器件的发光效率，其中每行的任意相邻两个像素单元之间的线路等效电阻值Ri相等且均为R。
S102、根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系。
在该步骤中，根据公式L i＝kC(V ti) 2以及该多个第一亮度值以及该多个实际驱动电压值建立亮度值与实际驱动电压值的映射关系，该映射关系为L-Vt曲线，其中，该C与像素单元的薄膜晶体管的载流子迁移率、沟道电容特性相关的常数。
S103、获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的目标驱动电压值。
在该步骤中，该目标亮度值为用户需要的显示亮度值，所有像素单元具有相同的目标亮度值，而在补偿前，由于像素单元之间的电阻消耗，导致各个像素单元实际驱动电压值不相同，因此各个像素单元的亮度值也不相同。
其中，当获取到该目标亮度值后，根据图3所示的曲线图，就可以找到对应的目标驱动电压值。
S104、根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿。
在该步骤中，根据目标驱动电压值得到目标灰阶电压DATA’及目标灰阶g’；根据每一像素单元当前的实际驱动电压值、目标灰阶电压DATA’及目标灰阶g’对每个像素单元进行分别调整。由于在补偿前，每个像素单元获取的实际驱动电压各不相同，因此，补偿时，根据目标驱动电压值得到的补偿程度也各不相同。
由上可知，本申请通过获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值；根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的目标驱动电压值；根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿；具有提高显示品质，降低色偏的有益效果。
请参照图4，图4为本申请实施例中的OLED发光补偿装置的结构图，用于对显示面板的多个像素单元进行补偿，该装置包括：第一获取模块201、建立模块202、计算模块203以及补偿模块204。
其中，该第一获取模块201用于获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值；在一些实施例中，该第一获取模块201包括：第一获取单元，用于获取检测到的所述多个像素单元在多个预设灰阶下的第一亮度值；第二获取单元，用于获取在该第一亮度值下的每一行内的任意相邻两个像素单元之间线路等效电阻值Ri以及该行像素单元首端输入的初始驱动电压ELVDD；第一计算单元，用于根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值。
其中，该建立模块202用于根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；该建立模块202根据公式L i＝kC(V ti) 2以及该多个第一亮度值以及该多个实际驱动电压值建立亮度值与实际驱动电压值的映射关系，该映射关系为L-Vt曲线，其中，该C与像素单元的薄膜晶体管的载流子迁移率、沟道电容特性相关的常数。
其中，该计算模块203用于获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的目标驱动电压值。具体地，该计算模块203用于根据以下两个公式计算每一所述像素单元的实际驱动电压值Vti：
Figure PCTCN2018114116-appb-000009
以及，
Figure PCTCN2018114116-appb-000010
其中，DATA为同一灰阶下的灰阶电压值，L P以及L Q分别为亮度值，k为OLED器件的发光效率，其中每行的任意相邻两个像素单元之间的线路等效电阻值Ri相等且均为R。该目标亮度值为用户需要的显示亮度值，所有像素单元具有相同的目标亮度值，而在补偿前，由于像素单元之间的电阻消耗，导致各个像素单元实际驱动电压值不相同，因此各个像素单元的亮度值也不相同。
其中，该补偿模块204用于根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿。补偿模块204根据目标驱动电压值得到目标灰阶电压DATA’及目标灰阶g’；根据每一像素单元当前的实际驱动电压值、目标灰阶电压DATA’及目标灰阶g’对每个像素单元进行分别调整。由于在补偿前，每个像素单元获取的实际驱动电压各不相同，因此，补偿时，根据目标驱动电压值得到的补偿程度也各不相同。
由上可知，本申请通过获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值；根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的 目标驱动电压值；根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿；具有提高显示品质，降低色偏的有益效果。
请参照图5，本申请还提供了一种显示装置300，包括处理器301和存储器302，所述存储器302中存储有计算机程序，所述处理器301通过调用所述存储器中存储的所述计算机程序，用于执行上述任一项所述的方法。其中，处理器301与存储器302电性连接。处理器301是终端300的控制中心，利用各种接口和线路连接整个终端的各个部分，通过运行或调用存储在存储器302内的计算机程序，以及调用存储在存储器302内的数据，执行显示装置的各种功能和处理数据，从而对显示控制。
在本实施例中，显示装置300中的处理器301会按照如下的步骤，将一个或一个以上的计算机程序的进程对应的指令加载到存储器302中，并由处理器301来运行存储在存储器302中的计算机程序，从而实现各种功能，例如：通过获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值；根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的目标驱动电压值；根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿。
需要说明的是，本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于计算机可读存储介质中，该存储介质可以包括但不限于：只读存储器(ROM，Read Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁盘或光盘等。
以上对本申请实施例提供的显示面板进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请。同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (15)

  1. 一种OLED发光补偿方法，用于对显示面板的多个像素单元进行补偿，其中，该方法包括以下步骤：
    通过检测装置检测所述显示面板以获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值；
    根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；
    获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的目标驱动电压值；
    根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿。
  2. 根据权利要求1所述的OLED发光补偿方法，其中，所述获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值的步骤包括：
    获取检测到的所述多个像素单元在多个预设灰阶下的第一亮度值；
    获取在该第一亮度值下的每一行内的任意相邻两个像素单元之间线路等效电阻值Ri以及该行像素单元首端输入的初始驱动电压ELVDD；
    根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值。
  3. 根据权利要求2所述的OLED发光补偿方法，其中，所述根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值的步骤包括：
    根据以下两个公式计算每一所述像素单元的实际驱动电压值Vt i：
    Figure PCTCN2018114116-appb-100001
    以及，
    Figure PCTCN2018114116-appb-100002
    其中，DATA为同一灰阶下的灰阶电压值，L P以及L Q分别为亮度值，k为OLED器件的发光效率，其中每行的任意相邻两个像素单元之间的线路等效电阻值Ri相等且均为R。
  4. 根据权利要求3所述的OLED发光补偿方法，其中，所述根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系的步骤包括：
    根据公式L i＝kC(V ti) 2以及该多个第一亮度值以及该多个实际驱动电压值建立亮度值与实际驱动电压值的映射关系，该映射关系为L-Vt曲线，其中，该C与像素单元的薄膜晶体管的载流子迁移率、沟道电容特性相关的常数。
  5. 根据权利要求4所述的OLED发光补偿方法，其中，所述根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿的步骤包括：
    根据目标驱动电压值得到目标灰阶电压DATA’及目标灰阶g’；
    根据每一像素单元当前的实际驱动电压值、目标灰阶电压DATA’及目标灰阶g’对每个像素单元进行分别调整。
  6. 一种OLED发光补偿方法，用于对显示面板的多个像素单元进行补偿，其中，该方法包括以下步骤：
    获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值；
    根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；
    获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的目标驱动电压值；
    根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿。
  7. 根据权利要求6所述的OLED发光补偿方法，其中，所述获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值的步骤包括：
    获取检测到的所述多个像素单元在多个预设灰阶下的第一亮度值；
    获取在该第一亮度值下的每一行内的任意相邻两个像素单元之间线路等效电阻值Ri以及该行像素单元首端输入的初始驱动电压ELVDD；
    根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值。
  8. 根据权利要求7所述的OLED发光补偿方法，其中，所述根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值的步骤包括：
    根据以下两个公式计算每一所述像素单元的实际驱动电压值Vt i：
    Figure PCTCN2018114116-appb-100003
    以及，
    Figure PCTCN2018114116-appb-100004
    其中，DATA为同一灰阶下的灰阶电压值，L P以及L Q分别为亮度值，k为OLED器件的发光效率，其中每行的任意相邻两个像素单元之间的线路等效电阻值Ri相等且均为R。
  9. 根据权利要求8所述的OLED发光补偿方法，其中，所述根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系的步骤包括：
    根据公式L i＝kC(V ti) 2以及该多个第一亮度值以及该多个实际驱动电压值建立亮度值与实际驱动电压值的映射关系，该映射关系为L-Vt曲线，其中，该C与像素单元的薄膜晶体管的载流子迁移率、沟道电容特性相关的常数。
  10. 根据权利要求9所述的OLED发光补偿方法，其中，所述根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿的步骤包括：
    根据目标驱动电压值得到目标灰阶电压DATA’及目标灰阶g’；
    根据每一像素单元当前的实际驱动电压值、目标灰阶电压DATA’及目标灰阶g’对每个像素单元进行分别调整。
  11. 一种OLED发光补偿装置，用于对显示面板的多个像素单元进行补偿，其中，该装置包括：
    第一获取模块，用于获取每一像素单元在多个预设灰阶下的第一亮度值以及对应的实际驱动电压值；
    建立模块，用于根据该多个第一亮度值以及该多个实际驱动电压值建立的亮度值与实际驱动电压值的映射关系；
    计算模块，用于获取所述多个像素单元的目标亮度值，并根据所述映射关系以及所述目标亮度值计算出所述多个像素单元的目标驱动电压值；
    补偿模块，用于根据所述目标驱动电压值以及每一像素单元当前的实际驱动电压值对所述多个像素单元进行亮度补偿。
  12. 根据权利要求11所述的OLED发光补偿装置，其中，所述第一获取模块包括：
    第一获取单元，用于获取检测到的所述多个像素单元在多个预设灰阶下的第一亮度值；
    第二获取单元，用于获取在该第一亮度值下的每一行内的任意相邻两个像素单元之间线路等效电阻值Ri以及该行像素单元首端输入的初始驱动电压ELVDD；
    第一计算单元，用于根据所述等效电阻值Ri以及所述初始驱动电压ELVDD计算每一所述像素单元的实际驱动电压值。
  13. 根据权利要求12所述的OLED发光补偿装置，其中，所述计算模块用于根据以下两个公式计算每一所述像素单元的实际驱动电压值Vt i：
    Figure PCTCN2018114116-appb-100005
    以及，
    Figure PCTCN2018114116-appb-100006
    其中，DATA为同一灰阶下的灰阶电压值，L P以及L Q分别为亮度值，k为OLED器件的发光效率，其中每行的任意相邻两个像素单元之间的线路等效电阻值Ri相等且均为R。
  14. 根据权利要求13所述的OLED发光补偿装置，其中，所述建立模块具体包括：
    根据公式L i＝kC(V ti) 2以及该多个第一亮度值以及该多个实际驱动电压值建立亮度值与实际驱动电压值的映射关系，该映射关系为L-Vt曲线，其中，该 C与像素单元的薄膜晶体管的载流子迁移率、沟道电容特性相关的常数。
  15. 根据权利要求14所述的OLED发光补偿装置，其中，所述补偿模块具体用于：
    根据目标驱动电压值得到目标灰阶电压DATA’及目标灰阶g’；
    根据每一像素单元当前的实际驱动电压值、目标灰阶电压DATA’及目标灰阶g’对每个像素单元进行分别调整。
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