WO2018153032A1 - Oled像素的补偿方法和补偿装置、显示装置 - Google Patents

Oled像素的补偿方法和补偿装置、显示装置 Download PDF

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WO2018153032A1
WO2018153032A1 PCT/CN2017/096532 CN2017096532W WO2018153032A1 WO 2018153032 A1 WO2018153032 A1 WO 2018153032A1 CN 2017096532 W CN2017096532 W CN 2017096532W WO 2018153032 A1 WO2018153032 A1 WO 2018153032A1
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driving transistor
voltage
threshold voltage
transistor
driving
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PCT/CN2017/096532
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English (en)
French (fr)
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陈燚
何敏
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京东方科技集团股份有限公司
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Priority to EP17832725.0A priority Critical patent/EP3588481A4/en
Priority to US15/746,858 priority patent/US10706788B2/en
Publication of WO2018153032A1 publication Critical patent/WO2018153032A1/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
    • G09G3/3233—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
    • 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]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting 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
    • 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]
    • G09G3/3266—Details of drivers for scan electrodes
    • 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
    • G09G2320/0204—Compensation of DC component across the pixels in flat panels
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
    • 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

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a compensation method and a compensation device and a display device for an OLED pixel.
  • OLED Organic Light Emitting Diode
  • the OLED can be classified into a PMOLED (Passive Matrix Driving OLED) and an AMOLED (Active Matrix Driving OLED).
  • the AMOLED display has the advantages of low manufacturing cost, high response speed, power saving, DC drive for portable devices, and a wide operating temperature range, and is expected to become a next-generation flat panel display replacing LCD (Liquid Crystal Display).
  • the driving transistor is usually made of a semiconductor material such as amorphous silicon, polycrystalline silicon or metal oxide.
  • the individual driving transistors DT of the OLED pixel often exhibit fluctuations in electrical parameters such as threshold voltage Vth, mobility K, etc., so that the current flowing through the OLED device will follow the threshold voltage Vth and migration of the driving transistor DT.
  • the fluctuation of the rate K is different, which causes uneven brightness and affects the display quality.
  • An object of the present disclosure is to provide a compensation method and compensation device and display device for an OLED pixel.
  • a compensation method for an OLED pixel includes:
  • the OLED pixels are compensated according to the mobility of the driving transistor.
  • the obtaining a threshold voltage of the driving transistor includes:
  • the obtaining a threshold voltage of the driving transistor further includes:
  • An initial voltage of the first end of the drive transistor is set to zero while a first drive voltage is applied to the control terminal of the drive transistor.
  • the obtaining a threshold voltage of the driving transistor further includes:
  • the voltage at the first end of the driving transistor is increased by a charging capacitor before detecting a threshold voltage of the first terminal of the driving transistor when the output current of the driving transistor is changed from non-zero to zero.
  • the acquiring the mobility of the driving transistor according to a threshold voltage of the driving transistor includes:
  • the difference between the second driving voltage and the threshold voltage of the driving transistor is at least ten times the reference voltage.
  • the obtaining the mobility of the driving transistor according to the threshold voltage of the driving transistor further includes:
  • the voltage at the first end of the drive transistor is set to zero while a second drive voltage is applied to the control terminal of the drive transistor.
  • the obtaining the mobility of the driving transistor according to the threshold voltage of the driving transistor further includes:
  • a voltage of the first end of the driving transistor is increased by a charging capacitor before detecting a reference voltage of the first terminal of the driving transistor.
  • the compensating the OLED pixel according to the mobility of the driving transistor includes:
  • the compensation voltage is a ratio of a difference between the second driving voltage and a threshold voltage of the driving transistor and a square root of a mobility of the driving transistor.
  • a voltage of a control terminal of the driving transistor is provided by a data line through a first transistor, and a voltage of the first terminal of the driving transistor is provided by a detecting line through a second transistor;
  • the first transistor is turned on in response to the first scan signal
  • the second transistor is turned on in response to the second scan signal
  • a compensation apparatus for an OLED pixel includes:
  • a threshold voltage acquisition circuit for acquiring a threshold voltage of the driving transistor
  • a mobility acquisition circuit for acquiring a mobility of the driving transistor according to a threshold voltage of the driving transistor
  • a display device including the above-described pixel compensation device is provided.
  • FIG. 1 is a schematic block diagram showing the structure of an OLED pixel unit in an exemplary embodiment of the present disclosure
  • FIG. 2 schematically shows a flowchart of an OLED pixel compensation method in an exemplary embodiment of the present disclosure
  • FIG. 3 schematically shows a structural block diagram of an OLED pixel compensating apparatus in an exemplary embodiment of the present disclosure.
  • the present example embodiment provides a compensation method of an OLED pixel for compensating for a threshold voltage Vth and a mobility K of the driving transistor DT.
  • 1 is a schematic structural diagram of an OLED pixel unit corresponding to the pixel compensation method, the OLED pixel unit includes: a driving transistor DT, and an OLED device connected to the driving transistor DT, that is, an organic light emitting diode; and a control end of the driving transistor DT
  • the first terminal T1 is connected to the data line Data line, the first end is connected to the first voltage signal terminal OVDD, the second end is connected to the detection line Sense line through the second transistor T2; the detection line Sense line is also grounded through a charging capacitor C;
  • the other end of the OLED device is connected to the second voltage signal terminal OVSS; wherein the control terminal of the first transistor T1 receives the first scan signal Switch Scan, and the control terminal of the second transistor T2 receives the second scan signal Sense Scan.
  • the compensation method of the OLED pixel may include:
  • the OLED pixel compensation method provided by the exemplary embodiments of the present disclosure is obtained by
  • the threshold voltage Vth and the mobility K of the driving transistor DT are taken, and both are compensated when the driving voltage is set to cancel the influence of the threshold voltage Vth of the driving transistor DT and the mobility K on the output current Iout.
  • the output current Iout of the driving transistor DT of each pixel unit tends to be uniform, thereby ensuring uniformity of display brightness, thereby improving display quality.
  • the driving transistor DT in the exemplary embodiment may be an enhancement transistor or a depletion transistor, which is not specifically limited herein.
  • step S1 the threshold voltage Vth of the driving transistor DT is obtained.
  • the threshold voltage Vth of the driving transistor DT can be obtained by the following steps:
  • the first driving voltage V1 may be provided by the data line Data line through the first transistor T1.
  • the first transistor T1 should be turned on under the control of the first scanning signal Switch Scan; the first end of the driving transistor DT (ie, the connection)
  • the initial voltage of one end of the second transistor T2 may be supplied from the detection line Sense line through the second transistor T2, and the second transistor T2 should be turned on under the control of the second scan signal Sense Scan.
  • the magnitude of the first driving voltage V1 should be based on the ability to fully turn on the driving transistor DT. It should be noted that the voltage of the first end of the driving transistor DT is set to zero in order to eliminate the influence of the residual voltage on the detection result.
  • the threshold voltage Vsc of the first end of the driving transistor DT is detected when the output current of the driving transistor DT is changed from non-zero to zero.
  • the threshold voltage Vsc of the first end of the driving transistor DT can be obtained by reading the voltage signal of the detection line Sense line.
  • the detection line Sense line is grounded through a charging capacitor C
  • the voltage of the first terminal of the driving transistor DT is the charging voltage of the second transistor T2 as the output current of the driving transistor DT is charged to the charging capacitor C through the second transistor T2. Will gradually rise high.
  • the output current of the driving transistor DT is:
  • K is the mobility of the driving transistor DT
  • Vg is the voltage of the control terminal of the driving transistor DT
  • Vs is the voltage of the first terminal of the driving transistor DT
  • Vth is the threshold voltage of the driving transistor DT.
  • the threshold voltage Vsc V1 - Vsc of the driving transistor DT.
  • the threshold voltage Vth of the driving transistor DT can be obtained.
  • step S2 the mobility K of the driving transistor DT is obtained in accordance with the threshold voltage Vth of the driving transistor DT.
  • the mobility K of the driving transistor DT can be specifically obtained by the following steps:
  • the second driving voltage V2 can be provided by the data line Data line through the first transistor T1.
  • the first transistor T1 should be turned on under the control of the first scanning signal Switch Scan;
  • the voltage of the first end of the driving transistor DT can be Detect line Provided by the second transistor T2,
  • the second transistor T2 should be turned on under the control of the second scan signal Sense Scan.
  • the magnitude of the second driving voltage V2 is preferably a voltage that can completely turn on the driving transistor DT and is sufficiently large, and can be specifically referred to the requirements in the next step. It should be noted that the voltage of the first end of the driving transistor DT is set to zero in order to eliminate the influence of the residual voltage on the detection result.
  • the reference voltage Vr of the first end of the driving transistor DT can be obtained by reading the voltage signal of the detection line Sense line.
  • the detection line Sense line is grounded through a charging capacitor C, the voltage of the first terminal of the driving transistor DT gradually rises as the output current of the driving transistor DT is charged to the charging capacitor C through the second transistor T2.
  • V3 is the difference between the second driving voltage V2 and the threshold voltage Vth of the driving transistor DT
  • Vs is the voltage of the first terminal of the driving transistor DT, that is, the reference voltage Vr to be detected, and is also the charging of the second transistor T2. Voltage.
  • the second driving voltage V2 is sufficiently large to make the difference V3 between the second driving voltage V2 and the threshold voltage Vth of the driving transistor DT sufficiently large, and the charging time of the second transistor T2 is shortened to satisfy The above relationship.
  • the output current of the driving transistor DT is related to its threshold voltage Vth and mobility K, and the present exemplary embodiment has been driven when the second driving voltage V2 is set.
  • the threshold voltage Vth of the transistor DT is compensated, thereby eliminating the influence of the threshold voltage Vth on the driving transistor DT, in which case the output current of the driving transistor DT is only related to its mobility K.
  • the charging voltage obtained by the charging capacitor C, that is, the reference voltage Vr is also different; that is, the charging voltage, that is, the reference voltage Vr can Reflects the difference in mobility K.
  • the mobility K of the driving transistor DT can be obtained according to the relationship between the reference voltage Vr and the mobility K of the driving transistor DT; wherein, the relationship between the reference voltage Vr and the mobility K of the driving transistor DT It can be obtained by analog calculation or experimental means, and will not be described here.
  • the mobility K of the driving transistor DT can be obtained.
  • the threshold voltage Vth of the driving transistor DT has been compensated.
  • step S3 the OLED pixels are compensated according to the mobility K of the driving transistor DT.
  • Iout K ⁇ V3 2 .
  • a compensation voltage Vo may be obtained according to the difference V3 between the second driving voltage V2 and the threshold voltage Vth of the driving transistor DT and the mobility K of the driving transistor DT.
  • the compensation of the OLED pixels can be realized by compensating the threshold voltage Vth and the mobility K of the driving transistor DT, thereby improving the brightness uniformity between the respective OLED pixels to obtain a good display picture. quality.
  • the example embodiment further provides a compensation device for the OLED pixel.
  • the compensation device may include:
  • the threshold voltage acquisition unit 10 is configured to acquire a threshold voltage Vth of the driving transistor DT;
  • the mobility acquisition unit 20 is configured to obtain the mobility K of the driving transistor DT according to the threshold voltage Vth of the driving transistor DT;
  • the compensation unit 30 is configured to compensate the OLED pixel according to the mobility K of the driving transistor DT.
  • the threshold voltage Vth of the driving transistor is obtained according to the first driving voltage V1 and the threshold voltage Vsc of the first terminal of the driving transistor DT, and the mobility K of the driving transistor DT is based on the reference voltage Vr of the first terminal of the driving transistor DT.
  • the second driving transistor T2 is obtained by charging voltage.
  • units such as threshold voltage acquisition unit 10, mobility acquisition unit 20, compensation unit 30, etc. may be implemented by circuitry that is configured accordingly.
  • the example embodiment also provides a display device including the OLED pixel compensation device described above.
  • the output currents of the driving transistors DT in the respective pixel units of the display device tend to be uniform, so that the brightness uniformity of the display device can be ensured, thereby improving the display image quality.
  • the display device may include any product or component having a display function, such as a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator, and the like.
  • modules or units of equipment for action execution are mentioned in the detailed description above, such division is not mandatory. Indeed, in accordance with embodiments of the present disclosure, the features and functions of two or more modules or units described above may be embodied in one module or unit. Conversely, the features and functions of one of the modules or units described above may be further divided into multiple modules or units.
  • the technical solution according to an embodiment of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network.
  • a non-volatile storage medium which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.
  • a number of instructions are included to cause a computing device (which may be a personal computer, server, mobile terminal, or network device, etc.) to perform a method in accordance with an embodiment of the present disclosure.

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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

一种OLED像素的补偿方法和补偿装置、显示装置，涉及显示技术领域。OLED像素的补偿方法包括：获取驱动晶体管(DT)的阈值电压(Vth)(S1)；根据驱动晶体管(DT)的阈值电压(Vth)获取驱动晶体管(DT)的迁移率(K)(S2)；根据驱动晶体管(DT)的迁移率(K)对OLED像素进行补偿(S3)，可实现像素补偿，改善画质。

Description

OLED像素的补偿方法和补偿装置、显示装置
相关申请的交叉引用
本申请要求于2017年02月23日递交的中国专利申请第201710100112.8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
本公开涉及显示技术领域，尤其涉及一种OLED像素的补偿方法和补偿装置、显示装置。
背景技术
OLED(Organic Light Emitting Diode，有机发光二极管)作为一种电流型发光器件，具有自发光、快速响应、宽视角、以及可制作于柔性衬底等优点而被广泛的应用于高性能显示领域。按照驱动方式，OLED可分为PMOLED(Passive Matrix Driving OLED，无源矩阵驱动有机发光二极管)和AMOLED(Active Matrix Driving OLED，有源矩阵驱动有机发光二极管)。AMOLED显示器具有低制造成本、高应答速度、省电、可用于便携式设备的直流驱动、工作温度范围大等优点而有望成为取代LCD(Liquid Crystal Display，液晶显示器)的下一代平面显示器。
现有的OLED像素中，驱动晶体管通常由非晶硅、多晶硅或金属氧化物等半导体材料制成。但是，受限于制造工艺，OLED像素的各个驱动晶体管DT常常出现阈值电压Vth、迁移率K等电学参数的波动，从而导致流经OLED器件的电流会随着驱动晶体管DT的阈值电压Vth和迁移率K的波动而有所不同，进而造成亮度不均、影响显示画质。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本公开的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
本公开的目的在于提供一种OLED像素的补偿方法和补偿装置、显示装置。
本公开的其他特性和优点将通过下面的详细描述变得显然，或部分地通过本公开的实践而习得。
根据本公开的一个方面，提供一种OLED像素的补偿方法，包括：
获取驱动晶体管的阈值电压；
根据所述驱动晶体管的阈值电压获取所述驱动晶体管的迁移率；
根据所述驱动晶体管的迁移率对所述OLED像素进行补偿。
本公开的一种示例性实施例中，所述获取驱动晶体管的阈值电压包括：
施加一第一驱动电压至所述驱动晶体管的控制端以导通所述驱动晶体管；
检测所述驱动晶体管的输出电流由非零转变为零时所述驱动晶体管的第一端的临界电压；
根据所述第一驱动电压以及所述临界电压获取所述驱动晶体管的阈值电压。
本公开的一种示例性实施例中，所述获取驱动晶体管的阈值电压还包括：
在施加一第一驱动电压至所述驱动晶体管的控制端的同时，将所述驱动晶体管的第一端的初始电压置零。
本公开的一种示例性实施例中，所述获取驱动晶体管的阈值电压还包括：
在检测所述驱动晶体管的输出电流由非零转变为零时所述驱动晶体管的第一端的临界电压之前，通过充电电容提高所述驱动晶体管的第一端的电压。
本公开的一种示例性实施例中，所述根据所述驱动晶体管的阈值电压获取所述驱动晶体管的迁移率包括：
施加一第二驱动电压至所述驱动晶体管的控制端以导通所述驱动晶体管；
检测所述驱动晶体管的第一端的参考电压；
根据所述参考电压获取所述驱动晶体管的迁移率；
其中，所述第二驱动电压与所述驱动晶体管的阈值电压的差值至少为所述参考电压的十倍。
本公开的一种示例性实施例中，所述根据所述驱动晶体管的阈值电压获取所述驱动晶体管的迁移率还包括：
在施加一第二驱动电压至所述驱动晶体管的控制端的同时，将所述驱动晶体管的第一端的电压置零。
本公开的一种示例性实施例中，所述根据所述驱动晶体管的阈值电压获取所述驱动晶体管的迁移率还包括：
在检测所述驱动晶体管的第一端的参考电压之前，通过充电电容提高所述驱动晶体管的第一端的电压。
本公开的一种示例性实施例中，所述根据所述驱动晶体管的迁移率对所述OLED像素进行补偿包括：
根据所述第二驱动电压与所述驱动晶体管的阈值电压的差值以及所述驱动晶体管的迁移率获取一补偿电压，以实现对所述OLED像素的补偿。
本公开的一种示例性实施例中，所述补偿电压为所述第二驱动电压与所述驱动晶体管的阈值电压的差值与所述驱动晶体管的迁移率的平方根的比值。
本公开的一种示例性实施例中，所述驱动晶体管的控制端的电压由数据线通过第一晶体管提供，所述驱动晶体管的第一端的电压由检测线通过第二晶体管提供；
其中，所述第一晶体管响应第一扫描信号而导通，所述第二晶体管响应第二扫描信号而导通。
根据本公开的一个方面，提供一种OLED像素的补偿装置，包括：
阈值电压获取电路，用于获取驱动晶体管的阈值电压；
迁移率获取电路，用于根据所述驱动晶体管的阈值电压获取所述驱动晶体管的迁移率；
补偿电路，用于根据所述驱动晶体管的迁移率对所述OLED像素进行补偿。
根据本公开的一个方面，提供一种显示装置，包括上述的像素补偿装置。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，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示意性示出本公开示例性实施例中OLED像素单元的结构示意图；
图2示意性示出本公开示例性实施例中OLED像素补偿方法的流程图；
图3示意性示出本公开示例性实施例中OLED像素补偿装置的结构框图。
附图标记：
Data line   数据线
Sense line  检测线
Switch Scan 第一扫描信号
Sense Scan  第二扫描信号
OVDD        第一电压信号端
OVSS        第二电压信号端
DT          驱动晶体管
T1          第一晶体管
T2          第二晶体管
C      充电电容
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的范例；相反，提供这些实施方式使得本公开将更加全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施方式中。
此外，附图仅为本公开的示意性图解，并非一定是按比例绘制。图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。附图中所示的一些方框图是功能实体，不一定必须与物理或逻辑上独立的实体相对应。可以采用软件形式来实现这些功能实体，或在一个或多个硬件模块或集成电路中实现这些功能实体，或在不同网络和/或处理器装置和/或微控制器装置中实现这些功能实体。
本示例实施方式提供了一种OLED像素的补偿方法，用于对驱动晶体管DT的阈值电压Vth以及迁移率K进行补偿。图1为该像素补偿方法对应的OLED像素单元的结构示意图，所述OLED像素单元包括：一驱动晶体管DT，以及一连接该驱动晶体管DT的OLED器件即有机发光二极管；该驱动晶体管DT的控制端通过第一晶体管T1连接至数据线Data line，第一端连接第一电压信号端OVDD，第二端通过第二晶体管T2连接至检测线Sense line；检测线Sense line还通过一充电电容C接地；OLED器件的另一端连接第二电压信号端OVSS；其中，第一晶体管T1的控制端接收第一扫描信号Switch Scan，第二晶体管T2的控制端接收第二扫描信号Sense Scan。
基于此，如图2所示，所述OLED像素的补偿方法可以包括：
S1、获取驱动晶体管DT的阈值电压Vth；
S2、根据驱动晶体管DT的阈值电压Vth获取驱动晶体管DT的迁移率K；
S3、根据驱动晶体管DT的迁移率K对OLED像素进行补偿。
本公开示例性实施方式所提供的OLED像素补偿方法，通过获 取驱动晶体管DT的阈值电压Vth和迁移率K，在设置驱动电压时对二者进行补偿，以抵消驱动晶体管DT的阈值电压Vth和迁移率K对其输出电流Iout产生的影响。这样一来，各个像素单元的驱动晶体管DT的输出电流Iout趋于一致，即可保证显示亮度的均匀性，从而改善显示画质。
需要说明的是：本示例实施方式中的驱动晶体管DT可以是增强型晶体管或者耗尽型晶体管，这里对此不作具体限定。
下面将对本示例实施方式中的OLED像素补偿方法进行详细的说明。
在步骤S1中，获取驱动晶体管DT的阈值电压Vth。
本示例实施方式中，所述驱动晶体管DT的阈值电压Vth可以通过以下步骤获取：
S11、施加一第一驱动电压V1至驱动晶体管DT的控制端以导通该驱动晶体管DT，同时将驱动晶体管DT的第一端的初始电压置零。
其中，第一驱动电压V1可以由数据线Data line通过第一晶体管T1提供，此时第一晶体管T1应在第一扫描信号Switch Scan的控制下导通；驱动晶体管DT的第一端(即连接第二晶体管T2的一端)的初始电压可以由检测线Sense line通过第二晶体管T2提供，此时第二晶体管T2应在第二扫描信号Sense Scan的控制下导通。此外，第一驱动电压V1的大小应以能够完全导通驱动晶体管DT为准。需要说明的是：驱动晶体管DT的第一端的电压置零是为了消除残余电压对检测结果的影响。
S12、检测驱动晶体管DT的输出电流由非零转变为零时驱动晶体管DT的第一端的临界电压Vsc。
本示例实施方式中，驱动晶体管DT的第一端的临界电压Vsc可以通过读取检测线Sense line的电压信号而获得。
由于检测线Sense line通过一充电电容C接地，因此随着驱动晶体管DT的输出电流经过第二晶体管T2给该充电电容C充电，驱动晶体管DT的第一端的电压即第二晶体管T2的充电电压也会逐渐升 高。
根据驱动晶体管DT的I-V特性可知，驱动晶体管DT的输出电流为：
Iout＝K×(Vgs-Vth)2＝K×(Vg-Vs-Vth)2＝K×(V1-Vs-Vth)2；
其中，K为驱动晶体管DT的迁移率，Vg为驱动晶体管DT的控制端的电压，Vs为驱动晶体管DT的第一端的电压，Vth为驱动晶体管DT的阈值电压。
由此可知，当驱动晶体管DT的第一端的电压升高至V1-Vth时，驱动晶体管DT夹断，则输出电流为0，此时驱动晶体管DT的第一端的电压不再发生变化，即为临界电压Vsc。也就是说，驱动晶体管DT的输出电流由非零转变为零的时刻即为驱动晶体管DT的第一端的电压升高至V1-Vth的时刻，那么该临界电压Vsc＝V1-Vth。
S13、根据第一驱动电压V1以及临界电压Vsc获取驱动晶体管DT的阈值电压Vth。
具体而言，当驱动晶体管DT的输出电流为零时，驱动晶体管DT的控制端的电压为V1，驱动晶体管DT的第一端的电压为临界电压Vsc，基于上述驱动晶体管DT的输出电流关系Iout＝K×(V1-Vsc-Vth)2＝0可以得出：驱动晶体管DT的阈值电压Vth＝V1-Vsc。
基于上述步骤S11-S13，即可得到驱动晶体管DT的阈值电压Vth。
在步骤S2中，根据驱动晶体管DT的阈值电压Vth获取驱动晶体管DT的迁移率K。
本示例实施方式中，所述驱动晶体管DT的迁移率K具体可以通过以下步骤获取：
S21、施加一第二驱动电压V2至驱动晶体管DT的控制端以导通该驱动晶体管DT，同时将驱动晶体管DT的第一端的电压置零。
其中，第二驱动电压V2可以由数据线Data line通过第一晶体管T1提供，此时第一晶体管T1应在第一扫描信号Switch Scan的控制下导通；驱动晶体管DT的第一端的电压可以由检测线Sense line 通过第二晶体管T2提供，此时第二晶体管T2应在第二扫描信号Sense Scan的控制下导通。此外，第二驱动电压V2的大小优选为一能够完全导通驱动晶体管DT且足够大的电压，具体可以参考下一步骤中的要求。需要说明的是：驱动晶体管DT的第一端的电压置零是为了消除残余电压对检测结果的影响。
S22、检测驱动晶体管DT的第一端的参考电压Vr。
本示例实施方式中，驱动晶体管DT的第一端的参考电压Vr可以通过读取检测线Sense line的电压信号而获得。
由于检测线Sense line通过一充电电容C接地，因此随着驱动晶体管DT的输出电流经过第二晶体管T2给该充电电容C充电，驱动晶体管DT的第一端的电压会逐渐升高。
根据驱动晶体管DT的I-V特性可知，驱动晶体管DT的输出电流为：Iout＝K×(Vgs-Vth)2＝K×(Vg-Vs-Vth)2＝K×(V2-Vs-Vth)2。
基于此，在设置第二驱动电压V2时，可以先对驱动晶体管DT的阈值电压Vth进行补偿，即令V2＝V3+Vth，那么根据上述关系可将驱动晶体管DT的输出电流变为：
Iout＝K×(V3+Vth-Vs-Vth)2＝K×(V3-Vs)2；
其中，V3为第二驱动电压V2与驱动晶体管DT的阈值电压Vth的差值，Vs为驱动晶体管DT的第一端的电压，即所需检测的参考电压Vr，同时还是第二晶体管T2的充电电压。
在此情况下，为了减小驱动晶体管DT的第一端的电压Vs即参考电压Vr对其输出电流的影响，还应使V3>>Vs，具体可使第二驱动电压V2与驱动晶体管DT的阈值电压Vth的差值V3至少为参考电压Vr的十倍。在具体实施时，可以通过提供一足够大的第二驱动电压V2以使第二驱动电压V2与驱动晶体管DT的阈值电压Vth的差值V3足够大，同时缩短第二晶体管T2的充电时间来满足上述关系。
S23、根据参考电压Vr获取驱动晶体管DT的迁移率K。
现有技术中，驱动晶体管DT的输出电流与其阈值电压Vth和迁移率K相关，而本示例实施方式在设置第二驱动电压V2时已经对驱 动晶体管DT的阈值电压Vth进行了补偿，从而消除了阈值电压Vth对驱动晶体管DT的影响，在此情况下，驱动晶体管DT的输出电流仅与其迁移率K有关。基于此，由于每个驱动晶体管DT的迁移率K的差异导致其输出电流不同，因此通过充电电容C得到的充电电压即参考电压Vr也不相同；也就是说，该充电电压即参考电压Vr能够体现出迁移率K的差异。
这样一来，只要获取参考电压Vr，即可根据参考电压Vr与驱动晶体管DT的迁移率K的关系得到驱动晶体管DT的迁移率K；其中，参考电压Vr与驱动晶体管DT的迁移率K的关系具体可以通过模拟计算或者实验手段而得，这里不再赘述。
基于上述步骤S21-S23，即可得到驱动晶体管DT的迁移率K。其中，在获取驱动晶体管DT的迁移率K的过程中，已对驱动晶体管DT的阈值电压Vth进行了补偿。
在步骤S3中，根据驱动晶体管DT的迁移率K对OLED像素进行补偿。
本示例实施方式中，根据上一步骤所得到的驱动晶体管DT的输出电流：Iout＝K×(V3+Vth-Vs-Vth)2＝K×(V3-Vs)2。
当V3>>Vs时，Iout＝K×V32。
由此可知，当第二驱动电压V2与驱动晶体管DT的阈值电压Vth的差值V3一定时，驱动晶体管DT的输出电流仅与迁移率K有关。为了消除驱动晶体管DT的迁移率K对其输出电流产生的影响，可根据第二驱动电压V2与驱动晶体管DT的阈值电压Vth的差值V3以及驱动晶体管DT的迁移率K获取一补偿电压Vo，使补偿电压Vo等于第二驱动电压V2与驱动晶体管DT的阈值电压Vth的差值V3与驱动晶体管DT的迁移率K的平方根的比值，即Vo＝(V2-Vth)/√K＝V3/√K从而实现对驱动晶体管DT的迁移率K的补偿。
基于上述步骤S1-S3，即可通过对驱动晶体管DT的阈值电压Vth以及迁移率K的补偿，实现对OLED像素的补偿，从而改善各个OLED像素之间的亮度均匀性，以获得良好的显示画质。
本示例实施方式还提供了一种OLED像素的补偿装置，如图3所示，该补偿装置可以包括：
阈值电压获取单元10，用于获取驱动晶体管DT的阈值电压Vth；
迁移率获取单元20，用于根据驱动晶体管DT的阈值电压Vth获取驱动晶体管DT的迁移率K；
补偿单元30，用于根据驱动晶体管DT的迁移率K对OLED像素进行补偿。
其中，驱动晶体管的阈值电压Vth根据第一驱动电压V1和驱动晶体管DT的第一端的临界电压Vsc而得到，驱动晶体管DT的迁移率K根据驱动晶体管DT的第一端的参考电压Vr即第二驱动晶体管T2的充电电压而得到。在一个实施例中，诸如阈值电压获取单元10、迁移率获取单元20、补偿单元30等的单元可以由进行相应配置的电路来实现。
需要说明的是：所述OLED像素补偿装置中各模块单元的具体细节已经在对应的OLED像素补偿方法中进行了详细描述，这里不再赘述。
本示例实施方式还提供了一种显示装置，包括上述的OLED像素补偿装置。其中，该显示装置的各个像素单元中驱动晶体管DT的输出电流趋于一致，因此可以保证显示装置的亮度均匀性，从而改善显示画质。在本示例实施方式中，所述显示装置例如可以包括手机、平板电脑、电视机、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
应当注意，尽管在上文详细描述中提及了用于动作执行的设备的若干模块或者单元，但是这种划分并非强制性的。实际上，根据本公开的实施方式，上文描述的两个或更多模块或者单元的特征和功能可以在一个模块或者单元中具体化。反之，上文描述的一个模块或者单元的特征和功能可以进一步划分为由多个模块或者单元来具体化。
此外，尽管在附图中以特定顺序描述了本公开中方法的各个步骤，但是，这并非要求或者暗示必须按照该特定顺序来执行这些步骤，或是必须执行全部所示的步骤才能实现期望的结果。附加的或备选 的，可以省略某些步骤，将多个步骤合并为一个步骤执行，以及/或者将一个步骤分解为多个步骤执行等。
通过以上的实施方式的描述，本领域的技术人员易于理解，这里描述的示例实施方式可以通过软件实现，也可以通过软件结合必要的硬件的方式来实现。因此，根据本公开实施方式的技术方案可以以软件产品的形式体现出来，该软件产品可以存储在一个非易失性存储介质(可以是CD-ROM，U盘，移动硬盘等)中或网络上，包括若干指令以使得一台计算设备(可以是个人计算机、服务器、移动终端、或者网络设备等)执行根据本公开实施方式的方法。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由所附的权利要求指出。

Claims (12)

  1. 一种OLED像素的补偿方法，包括：
    获取驱动晶体管的阈值电压；
    根据所述驱动晶体管的阈值电压获取所述驱动晶体管的迁移率；
    根据所述驱动晶体管的迁移率对所述OLED像素进行补偿。
  2. 根据权利要求1所述的补偿方法，其中，所述获取驱动晶体管的阈值电压包括：
    施加一第一驱动电压至所述驱动晶体管的控制端以导通所述驱动晶体管；
    检测所述驱动晶体管的输出电流由非零转变为零时所述驱动晶体管的第一端的临界电压；
    根据所述第一驱动电压以及所述临界电压获取所述驱动晶体管的阈值电压。
  3. 根据权利要求2所述的补偿方法，其中，所述获取驱动晶体管的阈值电压还包括：
    在施加一第一驱动电压至所述驱动晶体管的控制端的同时，将所述驱动晶体管的第一端的初始电压置零。
  4. 根据权利要求2所述的补偿方法，其中，所述获取驱动晶体管的阈值电压还包括：
    在检测所述驱动晶体管的输出电流由非零转变为零时所述驱动晶体管的第一端的临界电压之前，通过充电电容提高所述驱动晶体管的第一端的电压。
  5. 根据权利要求1所述的补偿方法，其中，所述根据所述驱动晶体管的阈值电压获取所述驱动晶体管的迁移率包括：
    施加一第二驱动电压至所述驱动晶体管的控制端以导通所述驱动晶体管；
    检测所述驱动晶体管的第一端的参考电压；
    根据所述参考电压获取所述驱动晶体管的迁移率；
    其中，所述第二驱动电压与所述驱动晶体管的阈值电压的差值 至少为所述参考电压的十倍。
  6. 根据权利要求5所述的补偿方法，其中，所述根据所述驱动晶体管的阈值电压获取所述驱动晶体管的迁移率还包括：
    在施加一第二驱动电压至所述驱动晶体管的控制端的同时，将所述驱动晶体管的第一端的电压置零。
  7. 根据权利要求5所述的补偿方法，其中，所述根据所述驱动晶体管的阈值电压获取所述驱动晶体管的迁移率还包括：
    在检测所述驱动晶体管的第一端的参考电压之前，通过充电电容提高所述驱动晶体管的第一端的电压。
  8. 根据权利要求5所述的补偿方法，其中，所述根据所述驱动晶体管的迁移率对所述OLED像素进行补偿包括：
    根据所述第二驱动电压与所述驱动晶体管的阈值电压的差值以及所述驱动晶体管的迁移率获取一补偿电压，以实现对所述OLED像素的补偿。
  9. 根据权利要求8所述的补偿方法，其中，所述补偿电压为所述第二驱动电压与所述驱动晶体管的阈值电压的差值与所述驱动晶体管的迁移率的平方根的比值。
  10. 根据权利要求1-9任一项所述的补偿方法，其中，所述驱动晶体管的控制端的电压由数据线通过第一晶体管提供，所述驱动晶体管的第一端的电压由检测线通过第二晶体管提供；
    其中，所述第一晶体管响应第一扫描信号而导通，所述第二晶体管响应第二扫描信号而导通。
  11. 一种OLED像素的补偿装置，包括：
    阈值电压获取电路，用于获取驱动晶体管的阈值电压；
    迁移率获取电路，用于根据所述驱动晶体管的阈值电压获取所述驱动晶体管的迁移率；
    补偿电路，用于根据所述驱动晶体管的迁移率对所述OLED像素进行补偿。
  12. 一种显示装置，其中，包括权利要求11所述的像素补偿装置。
PCT/CN2017/096532 2017-02-23 2017-08-09 Oled像素的补偿方法和补偿装置、显示装置 WO2018153032A1 (zh)

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