WO2021022601A1 - Amoled display apparatus and drive method therefor - Google Patents

Amoled display apparatus and drive method therefor Download PDF

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Publication number
WO2021022601A1
WO2021022601A1 PCT/CN2019/104222 CN2019104222W WO2021022601A1 WO 2021022601 A1 WO2021022601 A1 WO 2021022601A1 CN 2019104222 W CN2019104222 W CN 2019104222W WO 2021022601 A1 WO2021022601 A1 WO 2021022601A1
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pixel unit
thin film
film transistor
electrically connected
threshold voltage
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PCT/CN2019/104222
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French (fr)
Chinese (zh)
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田新斌
徐向阳
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深圳市华星光电技术有限公司
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Publication of WO2021022601A1 publication Critical patent/WO2021022601A1/en

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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

Definitions

  • OLED display devices can be divided into passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED) are two categories, namely direct addressing and thin film transistor (Thin Film Transistor, TFT) matrix addressing.
  • AMOLED has pixels arranged in an array, is an active display type, has high luminous efficiency, and is generally used as a high-definition large-size display device.
  • AMOLED is a current drive device. When a current flows through the organic light-emitting diode, the organic light-emitting diode emits light, and the light-emitting brightness is determined by the current flowing through the organic light-emitting diode itself.
  • the conventional 2T1C pixel driving circuit for AMOLED includes a first thin film transistor T10, a second thin film transistor T20, a capacitor C10, and an organic light emitting diode D10.
  • the first thin film transistor T10 is a switch Thin film transistors
  • the second thin film transistor T20 is a driving thin film transistor
  • the capacitor C10 is a storage capacitor.
  • the anode of the test organic light emitting diode is grounded.
  • the gate of the first thin film transistor receives the scan signal, the source receives the data signal, and the drain is electrically connected to the first node;
  • the gate of the second thin film transistor is electrically connected to the first node, the source is electrically connected to the anode of the display organic light emitting diode, and the drain receives the power supply voltage;
  • the first terminal of the first capacitor is electrically connected to the first node, and the second terminal is grounded;
  • the scan signal controls the first thin film transistor and the third thin film transistor to turn on, and the data signal charges the first capacitor and the third capacitor so that the voltages of the first node and the second node rise, and the second and Four thin film transistors are turned on, indicating that the organic light-emitting diode and the test organic light-emitting diode start to emit light;
  • the display pixel unit is arranged in the effective display area of the AMOLED display device, and the threshold voltage compensation unit and the test pixel unit are arranged in the non-display area surrounding the effective display area of the AMOLED display device. Area.
  • FIG. 1 is a circuit diagram of a conventional AMOLED pixel driving circuit
  • FIG. 3 is a circuit diagram of a display pixel unit of the AMOLED display device of the present invention.
  • FIG. 4 is a circuit diagram of the test pixel unit of the AMOLED display device of the present invention
  • the display pixel unit 10 and the test pixel unit 30 are used for receiving the scan signal Gate and the data signal Data, and emit light under the driving of the scan signal Gate and the data signal Data;
  • the gate of the second thin film transistor T2 is electrically connected to the first node A, the source is electrically connected to the anode of the display organic light emitting diode D1, and the drain receives the power supply voltage Vdd;
  • the first terminal of the first capacitor C1 is electrically connected to the first node A, and the second terminal is grounded;
  • the anode of the display organic light emitting diode D1 is grounded.
  • the gate of the third thin film transistor T3 receives the scan signal Gate, the source receives the data signal Data, and the drain is electrically connected to the second node B;
  • the gate of the fourth thin film transistor T4 is electrically connected to the second node B, the source is electrically connected to the anode of the test organic light emitting diode D2, and the drain receives the power supply voltage Vdd;
  • the first terminal of the third capacitor C3 is electrically connected to the second node B, and the second terminal is grounded;
  • the anode of the test organic light emitting diode D2 is grounded.
  • first thin film transistor T1, the second thin film transistor T2, the first capacitor C1, and the display organic light emitting diode D1 are respectively connected with the third thin film transistor T3, the fourth thin film transistor T4, the third capacitor C3 and the test organic light emitting diode.
  • the electrical performance of D2 is the same, so that the threshold voltage drift in the display pixel unit 10 can be reflected by the test pixel unit 30.
  • the display pixel unit 10 is arranged in the effective display area 1 of the AMOLED display device, and the threshold voltage compensation unit 20 and the test pixel unit 30 are arranged in the AMOLED display device surrounding the effective display area 1.
  • the test pixel unit 30 and the threshold voltage compensation unit 20 cooperate to complete the threshold voltage compensation of the display pixel unit 10.
  • the display pixel unit 10 can be simplified.
  • the circuit structure increases the aperture ratio and driving cost of the display pixel unit 10, and improves the display effect.
  • the scan signal Gate controls the first thin film transistor T1 and the third thin film transistor T3 to turn on, and the data signal Data charges the first capacitor C1 and the third capacitor C3, so that the first node A and the second node
  • the voltage of B rises, the second and fourth thin film transistors T4 are turned on, indicating that the organic light emitting diode D1 and the test organic light emitting diode D2 start to emit light;
  • the threshold voltage compensation unit 20 detects the current flowing through the test pixel unit 30 from the source of the fourth thin film transistor T4, and compares the current flowing through the test pixel unit 30 with a preset standard current , Output the compensation signal ST according to the comparison result;
  • the threshold voltage compensation unit 20 determines that the threshold voltage drift of the driving thin film transistor, that is, the second thin film transistor T2, is ⁇ Vth according to the comparison result of the current flowing through the test pixel unit 30 and the preset standard current, the threshold The voltage magnitude of the compensation signal ST output by the voltage compensation unit 20 is:
  • ⁇ V is the voltage of the compensation signal ST
  • C2 is the size of the first capacitor C2
  • C1 is the size of the first capacitor C1
  • Cgd1 is the parasitic capacitance between the gate and drain of the first thin film transistor T1
  • Cgd2 is The parasitic capacitance between the gate and drain of the second thin film transistor T2
  • Cgs2 is the parasitic capacitance between the gate and the source of the second thin film transistor T2.
  • the present invention performs threshold voltage compensation by setting the test pixel unit and the threshold voltage compensation unit, which can effectively compensate the threshold voltage of the driving thin film transistor while simplifying the structure of the compensation circuit, increasing the aperture ratio and reducing the driving cost.
  • the present invention also provides a driving method of an AMOLED display device, including the following steps:
  • Step S1 Provide an AMOLED display device, including a display pixel unit 10, a threshold voltage compensation unit 20 electrically connected to the display pixel unit 10, and a test pixel unit 30 electrically connected to the threshold voltage compensation unit 20.
  • the display pixel unit 10 includes: a first thin film transistor T1, a second thin film transistor T2, a first capacitor C1, a second capacitor C2 And display organic light emitting diode D1;
  • the gate of the first thin film transistor T1 receives the scan signal Gate, the source receives the data signal Data, and the drain is electrically connected to the first node A;
  • the gate of the second thin film transistor T2 is electrically connected to the first node A, the source is electrically connected to the anode of the display organic light emitting diode D1, and the drain receives the power supply voltage Vdd;
  • the first terminal of the first capacitor C1 is electrically connected to the first node A, and the second terminal is grounded;
  • the first terminal of the second capacitor C2 receives the compensation signal ST, and the second terminal is electrically connected to the first node A;
  • the anode of the display organic light emitting diode D1 is grounded.
  • the test pixel unit 30 includes: a third thin film transistor T3, a fourth thin film transistor T4, a third capacitor C3 and a test organic light emitting diode D2;
  • the gate of the third thin film transistor T3 receives the scan signal Gate, the source receives the data signal Data, and the drain is electrically connected to the second node B;
  • the first terminal of the third capacitor C3 is electrically connected to the second node B, and the second terminal is grounded;
  • the anode of the test organic light emitting diode D2 is grounded.
  • first thin film transistor T1, the second thin film transistor T2, the first capacitor C1, and the display organic light emitting diode D1 are respectively connected with the third thin film transistor T3, the fourth thin film transistor T4, the third capacitor C3 and the test organic light emitting diode.
  • the electrical performance of D2 is the same, so that the threshold voltage drift in the display pixel unit 10 can be reflected by the test pixel unit 30.
  • the threshold voltage compensation unit 20 is electrically connected to the source of the fourth thin film transistor T4.
  • the display pixel unit 10 is arranged in the effective display area 1 of the AMOLED display device, and the threshold voltage compensation unit 20 and the test pixel unit 30 are arranged in the AMOLED display device surrounding the effective display area 1.
  • the test pixel unit 30 and the threshold voltage compensation unit 20 cooperate to complete the threshold voltage compensation of the display pixel unit 10.
  • the display pixel unit 10 can be simplified.
  • the circuit structure increases the aperture ratio and driving cost of the display pixel unit 10, and improves the display effect.
  • the AMOLED display device further includes: a gate driver 40, a source driver 50, a power source 60, a signal interface 70, a gamma converter 80, and a timing controller 90.
  • the signal interface 60 is electrically connected to the power supply 60 and the timing controller 90, which receives external voltage signals and low-voltage differential signals (Low-Voltage Differential Signaling, LVDS), and input voltage signals to the power supply 60, and input LVDS signals to the timing controller 90;
  • the timing controller 90 is electrically connected to the power supply 60, the signal interface 70, the source driver 50, and the gate driver 40 It receives the power supply voltage from the power supply 60, receives the LVDS signal from the signal interface 60, generates a Mini LVDS signal to the source driver 50, and generates a clock signal to the gate driver 40;
  • the gamma converter 80 is electrically connected to the power supply 60 and the source driver 50, which receive a common voltage from the power source 60 and generate a gamma voltage to the source
  • the scan signal Gate controls the first thin film transistor T1 and the third thin film transistor T3 to turn on, and the data signal Data charges the first capacitor C1 and the third capacitor C3, so that the first node A and the The voltage of the two nodes B rises, the second and fourth thin film transistors T4 are turned on, indicating that the organic light emitting diode D1 and the test organic light emitting diode D2 start to emit light.
  • Step S3 The threshold voltage compensation unit 20 detects the current flowing through the test pixel unit 30, compares the current flowing through the test pixel unit 30 with a preset standard current, and outputs a threshold voltage for compensating the display pixel unit 10 according to the comparison result The compensation signal ST;
  • the threshold voltage compensation unit 20 detects the current flowing through the test pixel unit 30 from the source of the fourth thin film transistor T4, and compares the current flowing through the test pixel unit 30 with a preset The standard current outputs a compensation signal ST according to the comparison result.
  • the threshold voltage compensation unit 20 determines that the threshold voltage drift of the driving thin film transistor, that is, the second thin film transistor T2, is ⁇ Vth according to the comparison result of the current flowing through the test pixel unit 30 and the preset standard current, the threshold The voltage magnitude of the compensation signal ST output by the voltage compensation unit 20 is:
  • ⁇ V is the voltage of the compensation signal ST
  • C2 is the size of the first capacitor C2
  • C1 is the size of the first capacitor C1
  • Cgd1 is the parasitic capacitance between the gate and drain of the first thin film transistor T1
  • Cgd2 is The parasitic capacitance between the gate and drain of the second thin film transistor T2
  • Cgs2 is the parasitic capacitance between the gate and the source of the second thin film transistor T2.
  • Step S4 The display pixel unit 10 receives the compensation signal ST, and uses the compensation signal ST to complete threshold voltage compensation.
  • the first end of the second capacitor C2 receives the compensation signal ST, so that the voltage of the first node A continues to rise to compensate for the threshold voltage shift of the second thin film transistor T2.
  • the present invention provides an AMOLED display device including a display pixel unit, a threshold voltage compensation unit electrically connected to the display pixel unit, and a test pixel unit electrically connected to the threshold voltage compensation unit;
  • the display pixel unit and the test pixel unit are used to receive scan signals and data signals, and emit light under the drive of the scan signals and data signals;
  • the threshold voltage compensation unit is used to detect the current flowing through the test pixel unit and compare The current flowing through the test pixel unit and the preset standard current, and output a compensation signal to the display pixel unit according to the comparison result, to perform threshold voltage compensation on the display pixel unit, by setting the test pixel unit and the threshold voltage compensation unit to perform Threshold voltage compensation can effectively compensate the threshold voltage of the driving thin film transistor while simplifying the structure of the compensation circuit, increasing the aperture ratio and reducing the driving cost.
  • the present invention also provides a driving method of an AMOLED display device, which can effectively compensate the threshold voltage of the driving thin film transistor while simplifying the structure of the compensation circuit, increasing the

Abstract

Disclosed are an AMOLED display apparatus and a drive method therefor. The AMOLED display apparatus comprises a display pixel unit (10), a threshold voltage compensation unit (20) electrically connected to the display pixel unit (10), and a test pixel unit (30) electrically connected to the threshold voltage compensation unit (20), wherein the display pixel unit (10) and the test pixel unit (30) are used for receiving a scanning signal (Gate) and a data signal (Data), and emitting light under the drive of the scanning signal (Gate) and the data signal (Data); and the threshold voltage compensation unit (20) is used for detecting the current flowing through the test pixel unit (30), comparing the current flowing through the test pixel unit (30) with a preset standard current, and outputting, according to a comparison result, a compensation signal (ST) to the display pixel unit (10), so as to perform threshold voltage compensation on the display pixel unit (10), so that the structure of a compensation circuit can be simplified while effectively compensating for the threshold voltage of a drive thin film transistor (T2), an aperture ratio can be improved and drive costs can be reduced.

Description

AMOLED显示装置及其驱动方法AMOLED display device and driving method thereof 技术领域Technical field
本发明涉及显示技术领域，尤其涉及AMOLED显示装置及其驱动方法。The present invention relates to the field of display technology, in particular to an AMOLED display device and a driving method thereof.
背景技术Background technique
有机发光二极管（Organic Light Emitting Display，OLED）显示装置具有自发光、驱动电压低、发光效率高、响应时间短、清晰度与对比度高、近180°视角、使用温度范围宽，可实现柔性显示与大面积全色显示等诸多优点，被业界公认为是最有发展潜力的显示装置。Organic Light Emitting Display (OLED) display devices have self-luminescence, low driving voltage, high luminous efficiency, short response time, high definition and contrast, close to 180° viewing angle, wide operating temperature range, and can realize flexible display and Large-area full-color display and many other advantages are recognized by the industry as the display device with the most potential for development.
OLED显示装置按照驱动方式可以分为无源矩阵型OLED（Passive Matrix OLED，PMOLED）和有源矩阵型OLED（Active Matrix OLED，AMOLED）两大类，即直接寻址和薄膜晶体管（Thin Film Transistor，TFT）矩阵寻址两类。其中，AMOLED具有呈阵列式排布的像素，属于主动显示类型，发光效能高，通常用作高清晰度的大尺寸显示装置。AMOLED是电流驱动器件，当有电流流过有机发光二极管时，有机发光二极管发光，且发光亮度由流过有机发光二极管自身的电流决定。大部分已有的集成电路（Integrated Circuit，IC）都只传输电压信号，故AMOLED的像素驱动电路需要完成将电压信号转变为电流信号的任务。传统的AMOLED像素驱动电路通常为2T1C，即两个薄膜晶体管加一个电容的结构，将电压变换为电流。OLED display devices can be divided into passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED) are two categories, namely direct addressing and thin film transistor (Thin Film Transistor, TFT) matrix addressing. Among them, AMOLED has pixels arranged in an array, is an active display type, has high luminous efficiency, and is generally used as a high-definition large-size display device. AMOLED is a current drive device. When a current flows through the organic light-emitting diode, the organic light-emitting diode emits light, and the light-emitting brightness is determined by the current flowing through the organic light-emitting diode itself. Most of the existing integrated circuits (Integrated Circuit, IC) only transmit voltage signals, so the pixel drive circuit of AMOLED needs to complete the task of converting voltage signals into current signals. The traditional AMOLED pixel drive circuit is usually 2T1C, that is, a structure of two thin film transistors and a capacitor to convert voltage into current.
如图1所示，传统的用于AMOLED的2T1C像素驱动电路，包括一第一薄膜晶体管T10、一第二薄膜晶体管T20、一电容C10及有机发光二极管D10，所述第一薄膜晶体管T10为开关薄膜晶体管，所述第二薄膜晶体管T20为驱动薄膜晶体管，所述电容C10为存储电容。具体地，所述第一薄膜晶体管T10的栅极接入扫描信号Gate，源极接入数据信号Data，漏极与第二薄膜晶体管T20的栅极电性连接；所述第二薄膜晶体管T20的源极接入电源电压Vdd，漏极电性连接有机发光二级管D10的阳极；有机发光二级管D10的阴极接地；电容C10的一端接地，另一端电性连接第二薄膜晶体管T20的栅极。AMOLED显示时，扫描信号Gate控制第一薄膜晶体管T10打开，数据信号Data经过第一薄膜晶体管T10进入到第二膜晶体管T20的栅极及电容C10，然后第一薄膜晶体管T10闭合，由于电容C10的存储作用，第二薄膜晶体管T20的栅极电压仍可继续保持数据信号电压，使得第二薄膜晶体管T20处于导通状态，驱动电流通过第二薄膜晶体管T20进入有机发光二级管D10，驱动有机发光二级管D10发光。As shown in FIG. 1, the conventional 2T1C pixel driving circuit for AMOLED includes a first thin film transistor T10, a second thin film transistor T20, a capacitor C10, and an organic light emitting diode D10. The first thin film transistor T10 is a switch Thin film transistors, the second thin film transistor T20 is a driving thin film transistor, and the capacitor C10 is a storage capacitor. Specifically, the gate of the first thin film transistor T10 is connected to the scan signal Gate, the source is connected to the data signal Data, and the drain is electrically connected to the gate of the second thin film transistor T20; The source is connected to the power supply voltage Vdd, the drain is electrically connected to the anode of the organic light emitting diode D10; the cathode of the organic light emitting diode D10 is grounded; one end of the capacitor C10 is grounded, and the other end is electrically connected to the gate of the second thin film transistor T20 pole. When AMOLED displays, the scanning signal Gate controls the first thin film transistor T10 to turn on, the data signal Data enters the gate of the second thin film transistor T20 and the capacitor C10 through the first thin film transistor T10, and then the first thin film transistor T10 is turned off. For storage, the gate voltage of the second thin film transistor T20 can continue to maintain the data signal voltage, so that the second thin film transistor T20 is in an on state, and the driving current enters the organic light emitting diode D10 through the second thin film transistor T20 to drive organic light emission The diode D10 emits light.
上述传统的用于AMOLED的2T1C像素驱动电路对驱动薄膜晶体管的阈值电压漂移很敏感，随着驱动薄膜晶体管的阈值电压漂移，流过有机发光二极管的电流变化很大，导致有机发光二极管的发光很不稳定、亮度很不均匀，极大地影响画面的显示效果。The above-mentioned conventional 2T1C pixel driving circuit for AMOLED is very sensitive to the threshold voltage drift of the driving thin film transistor. As the threshold voltage of the driving thin film transistor drifts, the current flowing through the organic light-emitting diode changes greatly, which causes the organic light-emitting diode to emit light. Instability and uneven brightness greatly affect the display effect of the picture.
技术问题technical problem
本发明的目的在于提供一种AMOLED显示装置，能够在有效补偿驱动薄膜晶体管的阈值电压的同时简化补偿电路的结构，提升开口率，降低驱动成本。The purpose of the present invention is to provide an AMOLED display device that can effectively compensate the threshold voltage of the driving thin film transistor while simplifying the structure of the compensation circuit, increasing the aperture ratio and reducing the driving cost.
本发明的目的还在于提供一种AMOLED显示装置的驱动方法，能够在有效补偿驱动薄膜晶体管的阈值电压的同时简化补偿电路的结构，提升开口率，降低驱动成本。The object of the present invention is also to provide a driving method of an AMOLED display device, which can effectively compensate the threshold voltage of the driving thin film transistor while simplifying the structure of the compensation circuit, increasing the aperture ratio and reducing the driving cost.
技术解决方案Technical solutions
为实现上述目的，本发明提供了一种AMOLED显示装置，包括显示像素单元、与所述显示像素单元电性连接的阈值电压补偿单元以及与所述阈值电压补偿单元电性连接的测试像素单元；In order to achieve the above objective, the present invention provides an AMOLED display device, including a display pixel unit, a threshold voltage compensation unit electrically connected to the display pixel unit, and a test pixel unit electrically connected to the threshold voltage compensation unit;
所述显示像素单元及测试像素单元用于接收扫描信号及数据信号，并在扫描信号及数据信号的驱动下发光；The display pixel unit and the test pixel unit are used to receive scan signals and data signals, and emit light under the drive of the scan signals and data signals;
所述阈值电压补偿单元用于侦测流过测试像素单元的电流，并比较流过测试像素单元的电流与预设的标准电流，以及根据比较结果向显示像素单元输出向补偿信号，以对所述显示像素单元进行阈值电压补偿。The threshold voltage compensation unit is used to detect the current flowing through the test pixel unit, compare the current flowing through the test pixel unit with a preset standard current, and output a compensation signal to the display pixel unit according to the comparison result, so as to The display pixel unit performs threshold voltage compensation.
所述显示像素单元包括：第一薄膜晶体管、第二薄膜晶体管、第一电容、第二电容及显示有机发光二极管；The display pixel unit includes: a first thin film transistor, a second thin film transistor, a first capacitor, a second capacitor, and a display organic light emitting diode;
所述第一薄膜晶体管的栅极接收扫描信号，源极接收数据信号，漏极电性连接第一节点；The gate of the first thin film transistor receives the scan signal, the source receives the data signal, and the drain is electrically connected to the first node;
所述第二薄膜晶体管的栅极电性连接第一节点，源极电性连接显示有机发光二极管的阳极，漏极接收电源电压；The gate of the second thin film transistor is electrically connected to the first node, the source is electrically connected to the anode of the display organic light emitting diode, and the drain receives the power supply voltage;
所述第一电容的第一端电性连接第一节点，第二端接地；The first terminal of the first capacitor is electrically connected to the first node, and the second terminal is grounded;
所述第二电容的第一端接收补偿信号，第二端电性连接第一节点；The first terminal of the second capacitor receives the compensation signal, and the second terminal is electrically connected to the first node;
所述显示有机发光二极管的阳极接地。The anode of the display organic light emitting diode is grounded.
所述测试像素单元包括：第三薄膜晶体管、第四薄膜晶体管、第三电容及测试有机发光二极管；The test pixel unit includes: a third thin film transistor, a fourth thin film transistor, a third capacitor, and a test organic light emitting diode;
所述第三薄膜晶体管的栅极接收扫描信号，源极接收数据信号，漏极电性连接第二节点；The gate of the third thin film transistor receives the scan signal, the source receives the data signal, and the drain is electrically connected to the second node;
所述第四薄膜晶体管的栅极电性连接第二节点，源极电性连接测试有机发光二极管的阳极，漏极接收电源电压；The gate of the fourth thin film transistor is electrically connected to the second node, the source is electrically connected to the anode of the test organic light emitting diode, and the drain receives the power supply voltage;
所述第三电容的第一端电性连接第二节点，第二端接地；The first terminal of the third capacitor is electrically connected to the second node, and the second terminal is grounded;
所述测试有机发光二极管的阳极接地。The anode of the test organic light emitting diode is grounded.
所述阈值电压补偿单元电性连接所述第四薄膜晶体管的源极。The threshold voltage compensation unit is electrically connected to the source of the fourth thin film transistor.
所述显示像素单元设于所述AMOLED显示装置的有效显示区内，所述阈值电压补偿单元及测试像素单元设于所述AMOLED显示装置包围所述有效显示区的非显示区内。The display pixel unit is arranged in an effective display area of the AMOLED display device, and the threshold voltage compensation unit and the test pixel unit are arranged in a non-display area of the AMOLED display device surrounding the effective display area.
本发明一种AMOLED显示装置的驱动方法，包括如下步骤：The driving method of an AMOLED display device of the present invention includes the following steps:
步骤S1、提供一AMOLED显示装置，包括显示像素单元、与所述显示像素单元电性连接的阈值电压补偿单元以及与所述阈值电压补偿单元电性连接的测试像素单元；Step S1: Provide an AMOLED display device, including a display pixel unit, a threshold voltage compensation unit electrically connected to the display pixel unit, and a test pixel unit electrically connected to the threshold voltage compensation unit;
步骤S2、向所述显示像素单元及测试像素单元输入扫描信号及数据信号，驱动所述显示像素单元及测试像素单元发光；Step S2: Input scan signals and data signals to the display pixel unit and the test pixel unit, and drive the display pixel unit and the test pixel unit to emit light;
步骤S3、阈值电压补偿单元侦测流过测试像素单元的电流，并比较流过测试像素单元的电流与预设的标准电流，根据比较结果输出用于补偿显示像素单元的阈值电压的补偿信号；Step S3: The threshold voltage compensation unit detects the current flowing through the test pixel unit, compares the current flowing through the test pixel unit with a preset standard current, and outputs a compensation signal for compensating the threshold voltage of the display pixel unit according to the comparison result;
步骤S4、所述显示像素单元接收补偿信号，并利用所述补偿信号完成阈值电压补偿。Step S4: The display pixel unit receives a compensation signal, and uses the compensation signal to complete threshold voltage compensation.
所述步骤S1中，显示像素单元包括：第一薄膜晶体管、第二薄膜晶体管、第一电容、第二电容及显示有机发光二极管；In the step S1, the display pixel unit includes: a first thin film transistor, a second thin film transistor, a first capacitor, a second capacitor, and a display organic light emitting diode;
所述第一薄膜晶体管的栅极接收扫描信号，源极接收数据信号，漏极电性连接第一节点；The gate of the first thin film transistor receives the scan signal, the source receives the data signal, and the drain is electrically connected to the first node;
所述第二薄膜晶体管的栅极电性连接第一节点，源极电性连接显示有机发光二极管的阳极，漏极接收电源电压；The gate of the second thin film transistor is electrically connected to the first node, the source is electrically connected to the anode of the display organic light emitting diode, and the drain receives the power supply voltage;
所述第一电容的第一端电性连接第一节点，第二端接地；The first terminal of the first capacitor is electrically connected to the first node, and the second terminal is grounded;
所述第二电容的第一端接收补偿信号，第二端电性连接第一节点；The first terminal of the second capacitor receives the compensation signal, and the second terminal is electrically connected to the first node;
所述显示有机发光二极管的阳极接地。The anode of the display organic light emitting diode is grounded.
所述步骤S1中，所述测试像素单元包括：第三薄膜晶体管、第四薄膜晶体管、第三电容及测试有机发光二极管；In the step S1, the test pixel unit includes: a third thin film transistor, a fourth thin film transistor, a third capacitor, and a test organic light emitting diode;
所述第三薄膜晶体管的栅极接收扫描信号，源极接收数据信号，漏极电性连接第二节点；The gate of the third thin film transistor receives the scan signal, the source receives the data signal, and the drain is electrically connected to the second node;
所述第四薄膜晶体管的栅极电性连接第二节点，源极电性连接测试有机发光二极管的阳极，漏极接收电源电压；The gate of the fourth thin film transistor is electrically connected to the second node, the source is electrically connected to the anode of the test organic light emitting diode, and the drain receives the power supply voltage;
所述第三电容的第一端电性连接第二节点，第二端接地；The first terminal of the third capacitor is electrically connected to the second node, and the second terminal is grounded;
所述测试有机发光二极管的阳极接地；所述阈值电压补偿单元电性连接所述第四薄膜晶体管的源极。The anode of the test organic light emitting diode is grounded; the threshold voltage compensation unit is electrically connected to the source of the fourth thin film transistor.
所述步骤S2中，所述扫描信号控制第一薄膜晶体管及第三薄膜晶体管打开，数据信号对第一电容及第三电容充电，使得第一节点和第二节点的电压上升，第二及第四薄膜晶体管打开，显示有机发光二极管及测试有机发光二极管开始发光；In the step S2, the scan signal controls the first thin film transistor and the third thin film transistor to turn on, and the data signal charges the first capacitor and the third capacitor so that the voltages of the first node and the second node rise, and the second and Four thin film transistors are turned on, indicating that the organic light-emitting diode and the test organic light-emitting diode start to emit light;
所述步骤S3中，所述阈值电压补偿单元从第四薄膜晶体管的源极侦测流过测试像素单元的电流，并比较流过测试像素单元的电流与预设的标准电流，根据比较结果输出补偿信号；In the step S3, the threshold voltage compensation unit detects the current flowing through the test pixel unit from the source of the fourth thin film transistor, compares the current flowing through the test pixel unit with a preset standard current, and outputs according to the comparison result Compensation signal
所述步骤S4中，所述第二电容的第一端接收补偿信号，使得第一节点的电压继续上升，以补偿第二薄膜晶体管的阈值电压偏移。In the step S4, the first terminal of the second capacitor receives the compensation signal, so that the voltage of the first node continues to rise to compensate for the threshold voltage shift of the second thin film transistor.
所述步骤S1中，所述显示像素单元设于所述AMOLED显示装置的有效显示区内，所述阈值电压补偿单元及测试像素单元设于所述AMOLED显示装置包围所述有效显示区的非显示区内。In the step S1, the display pixel unit is arranged in the effective display area of the AMOLED display device, and the threshold voltage compensation unit and the test pixel unit are arranged in the non-display area surrounding the effective display area of the AMOLED display device. Area.
有益效果Beneficial effect
本发明的有益效果：本发明提供了一种AMOLED显示装置，包括显示像素单元、与所述显示像素单元电性连接的阈值电压补偿单元以及与所述阈值电压补偿单元电性连接的测试像素单元；所述显示像素单元及测试像素单元用于接收扫描信号及数据信号，并在扫描信号及数据信号的驱动下发光；所述阈值电压补偿单元用于侦测流过测试像素单元的电流，并比较流过测试像素单元的电流与预设的标准电流，以及根据比较结果向显示像素单元输出向补偿信号，以对所述显示像素单元进行阈值电压补偿，通过设置测试像素单元及阈值电压补偿单元进行阈值电压补偿，能够在有效补偿驱动薄膜晶体管的阈值电压的同时简化补偿电路的结构，提升开口率，降低驱动成本。本发明还提供一种AMOLED显示装置的驱动方法，能够在有效补偿驱动薄膜晶体管的阈值电压的同时简化补偿电路的结构，提升开口率，降低驱动成本。The beneficial effects of the present invention: the present invention provides an AMOLED display device, including a display pixel unit, a threshold voltage compensation unit electrically connected to the display pixel unit, and a test pixel unit electrically connected to the threshold voltage compensation unit The display pixel unit and the test pixel unit are used to receive scan signals and data signals, and emit light under the drive of the scan signals and data signals; the threshold voltage compensation unit is used to detect the current flowing through the test pixel unit, and Compare the current flowing through the test pixel unit with a preset standard current, and output a compensation signal to the display pixel unit according to the comparison result to perform threshold voltage compensation on the display pixel unit, by setting the test pixel unit and the threshold voltage compensation unit Performing threshold voltage compensation can effectively compensate the threshold voltage of the driving thin film transistor while simplifying the structure of the compensation circuit, increasing the aperture ratio and reducing the driving cost. The present invention also provides a driving method of an AMOLED display device, which can effectively compensate the threshold voltage of the driving thin film transistor while simplifying the structure of the compensation circuit, increasing the aperture ratio and reducing the driving cost.
附图说明Description of the drawings
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。In order to further understand the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the accompanying drawings are only provided for reference and illustration and are not used to limit the present invention.
附图中，In the attached picture,
图1为现有的AMOLED像素驱动电路的电路图；FIG. 1 is a circuit diagram of a conventional AMOLED pixel driving circuit;
图2为本发明的AMOLED显示装置的示意图；2 is a schematic diagram of the AMOLED display device of the present invention;
图3为本发明的AMOLED显示装置的显示像素单元的电路图；3 is a circuit diagram of a display pixel unit of the AMOLED display device of the present invention;
图4为本发明的AMOLED显示装置的测试像素单元的电路图4 is a circuit diagram of the test pixel unit of the AMOLED display device of the present invention
图5为本发明的AMOLED显示装置的工作波形图；Fig. 5 is a working waveform diagram of the AMOLED display device of the present invention;
图6为本发明的AMOLED显示装置的驱动方法的流程图。FIG. 6 is a flowchart of the driving method of the AMOLED display device of the present invention.
本发明的实施方式Embodiments of the invention
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。In order to further explain the technical means adopted by the present invention and its effects, the following describes in detail the preferred embodiments of the present invention and the accompanying drawings.
请参阅图2至图5，本发明提供一种AMOLED显示装置，包括显示像素单元10、与所述显示像素单元10电性连接的阈值电压补偿单元20以及与所述阈值电压补偿单元20电性连接的测试像素单元30；2 to FIG. 5, the present invention provides an AMOLED display device, including a display pixel unit 10, a threshold voltage compensation unit 20 electrically connected to the display pixel unit 10, and electrical connection with the threshold voltage compensation unit 20 Connected test pixel unit 30;
所述显示像素单元10及测试像素单元30用于接收扫描信号Gate及数据信号Data，并在扫描信号Gate及数据信号Data的驱动下发光；The display pixel unit 10 and the test pixel unit 30 are used for receiving the scan signal Gate and the data signal Data, and emit light under the driving of the scan signal Gate and the data signal Data;
所述阈值电压补偿单元20用于侦测流过测试像素单元30的电流，并比较流过测试像素单元30的电流与预设的标准电流，以及根据比较结果向显示像素单元10输出向补偿信号ST，以对所述显示像素单元10进行阈值电压补偿。The threshold voltage compensation unit 20 is used to detect the current flowing through the test pixel unit 30, compare the current flowing through the test pixel unit 30 with a preset standard current, and output a compensation signal to the display pixel unit 10 according to the comparison result ST to perform threshold voltage compensation on the display pixel unit 10.
具体地，如图3所示，在本发明的优选实施例中，所述显示像素单元10包括：第一薄膜晶体管T1、第二薄膜晶体管T2、第一电容C1、第二电容C2及显示有机发光二极管D1；Specifically, as shown in FIG. 3, in a preferred embodiment of the present invention, the display pixel unit 10 includes: a first thin film transistor T1, a second thin film transistor T2, a first capacitor C1, a second capacitor C2, and a display organic Light emitting diode D1;
所述第一薄膜晶体管T1的栅极接收扫描信号Gate，源极接收数据信号Data，漏极电性连接第一节点A；The gate of the first thin film transistor T1 receives the scan signal Gate, the source receives the data signal Data, and the drain is electrically connected to the first node A;
所述第二薄膜晶体管T2的栅极电性连接第一节点A，源极电性连接显示有机发光二极管D1的阳极，漏极接收电源电压Vdd；The gate of the second thin film transistor T2 is electrically connected to the first node A, the source is electrically connected to the anode of the display organic light emitting diode D1, and the drain receives the power supply voltage Vdd;
所述第一电容C1的第一端电性连接第一节点A，第二端接地；The first terminal of the first capacitor C1 is electrically connected to the first node A, and the second terminal is grounded;
所述第二电容C2的第一端接收补偿信号ST，第二端电性连接第一节点A；The first terminal of the second capacitor C2 receives the compensation signal ST, and the second terminal is electrically connected to the first node A;
所述显示有机发光二极管D1的阳极接地。The anode of the display organic light emitting diode D1 is grounded.
进一步地，如图4所示，在本发明的优选实施例中，所述测试像素单元30包括：第三薄膜晶体管T3、第四薄膜晶体管T4、第三电容C3及测试有机发光二极管D2；Further, as shown in FIG. 4, in a preferred embodiment of the present invention, the test pixel unit 30 includes: a third thin film transistor T3, a fourth thin film transistor T4, a third capacitor C3 and a test organic light emitting diode D2;
所述第三薄膜晶体管T3的栅极接收扫描信号Gate，源极接收数据信号Data，漏极电性连接第二节点B；The gate of the third thin film transistor T3 receives the scan signal Gate, the source receives the data signal Data, and the drain is electrically connected to the second node B;
所述第四薄膜晶体管T4的栅极电性连接第二节点B，源极电性连接测试有机发光二极管D2的阳极，漏极接收电源电压Vdd；The gate of the fourth thin film transistor T4 is electrically connected to the second node B, the source is electrically connected to the anode of the test organic light emitting diode D2, and the drain receives the power supply voltage Vdd;
所述第三电容C3的第一端电性连接第二节点B，第二端接地；The first terminal of the third capacitor C3 is electrically connected to the second node B, and the second terminal is grounded;
所述测试有机发光二极管D2的阳极接地。The anode of the test organic light emitting diode D2 is grounded.
需要说明的是，第一薄膜晶体管T1、第二薄膜晶体管T2、第一电容C1及显示有机发光二极管D1分别与第三薄膜晶体管T3、第四薄膜晶体管T4、第三电容C3及测试有机发光二极管D2的电学性能相同，从而能够通过测试像素单元30反应出显示像素单元10中的阈值电压漂移。It should be noted that the first thin film transistor T1, the second thin film transistor T2, the first capacitor C1, and the display organic light emitting diode D1 are respectively connected with the third thin film transistor T3, the fourth thin film transistor T4, the third capacitor C3 and the test organic light emitting diode. The electrical performance of D2 is the same, so that the threshold voltage drift in the display pixel unit 10 can be reflected by the test pixel unit 30.
具体地，所述阈值电压补偿单元20电性连接所述第四薄膜晶体管T4的源极。Specifically, the threshold voltage compensation unit 20 is electrically connected to the source of the fourth thin film transistor T4.
具体地，所述显示像素单元10设于所述AMOLED显示装置的有效显示区1内，所述阈值电压补偿单元20及测试像素单元30设于所述AMOLED显示装置包围所述有效显示区1的非显示区2内，通过测试像素单元30及阈值电压补偿单元20配合完成显示像素单元10的阈值电压补偿，相比于在显示像素单元10增加补偿TFT构成补偿电路，能够简化显示像素单元10的电路结构，提升显示像素单元10的开口率及驱动成本，改善显示效果。Specifically, the display pixel unit 10 is arranged in the effective display area 1 of the AMOLED display device, and the threshold voltage compensation unit 20 and the test pixel unit 30 are arranged in the AMOLED display device surrounding the effective display area 1. In the non-display area 2, the test pixel unit 30 and the threshold voltage compensation unit 20 cooperate to complete the threshold voltage compensation of the display pixel unit 10. Compared with adding a compensation TFT to the display pixel unit 10 to form a compensation circuit, the display pixel unit 10 can be simplified. The circuit structure increases the aperture ratio and driving cost of the display pixel unit 10, and improves the display effect.
需要说明的是，如图5所示，所述AMOLED显示装置三个工作过程依次包括：第一阶段100、第二阶段200及第三阶段300；It should be noted that, as shown in FIG. 5, the three working processes of the AMOLED display device sequentially include: a first stage 100, a second stage 200, and a third stage 300;
其中在第一阶段100，所述扫描信号Gate控制第一薄膜晶体管T1及第三薄膜晶体管T3打开，数据信号Data对第一电容C1及第三电容C3充电，使得第一节点A和第二节点B的电压上升，第二及第四薄膜晶体管T4打开，显示有机发光二极管D1及测试有机发光二极管D2开始发光；In the first stage 100, the scan signal Gate controls the first thin film transistor T1 and the third thin film transistor T3 to turn on, and the data signal Data charges the first capacitor C1 and the third capacitor C3, so that the first node A and the second node The voltage of B rises, the second and fourth thin film transistors T4 are turned on, indicating that the organic light emitting diode D1 and the test organic light emitting diode D2 start to emit light;
在第二阶段200中，所述阈值电压补偿单元20从第四薄膜晶体管T4的源极侦测流过测试像素单元30的电流，并比较流过测试像素单元30的电流与预设的标准电流，根据比较结果输出补偿信号ST；In the second stage 200, the threshold voltage compensation unit 20 detects the current flowing through the test pixel unit 30 from the source of the fourth thin film transistor T4, and compares the current flowing through the test pixel unit 30 with a preset standard current , Output the compensation signal ST according to the comparison result;
在第三阶段300中，所述第二电容C2的第一端接收补偿信号ST，使得第一节点A的电压继续上升，以补偿第二薄膜晶体管T2的阈值电压偏移。In the third stage 300, the first end of the second capacitor C2 receives the compensation signal ST, so that the voltage of the first node A continues to rise to compensate for the threshold voltage shift of the second thin film transistor T2.
举例说明，当阈值电压补偿单元20根据流过测试像素单元30的电流与预设的标准电流的比较结果确定驱动薄膜晶体管即第二薄膜晶体管T2的阈值电压的漂移量为ΔVth时，所述阈值电压补偿单元20输出的补偿信号ST的电压大小为：For example, when the threshold voltage compensation unit 20 determines that the threshold voltage drift of the driving thin film transistor, that is, the second thin film transistor T2, is ΔVth according to the comparison result of the current flowing through the test pixel unit 30 and the preset standard current, the threshold The voltage magnitude of the compensation signal ST output by the voltage compensation unit 20 is:
Figure 355908dest_path_image002
Figure 355908dest_path_image002
其中，ΔV为补偿信号ST的电压大小，C2为第一电容C2的大小，C1为第一电容C1的大小，Cgd1为第一薄膜晶体管T1的栅极与漏极之间的寄生电容，Cgd2为第二薄膜晶体管T2的栅极与漏极之间的寄生电容，Cgs2为第二薄膜晶体管T2的栅极与源极之间的寄生电容。Where ΔV is the voltage of the compensation signal ST, C2 is the size of the first capacitor C2, C1 is the size of the first capacitor C1, Cgd1 is the parasitic capacitance between the gate and drain of the first thin film transistor T1, and Cgd2 is The parasitic capacitance between the gate and drain of the second thin film transistor T2, Cgs2 is the parasitic capacitance between the gate and the source of the second thin film transistor T2.
进一步地，如图2所示，所述AMOLED显示装置，还包括：栅极驱动器40、源极驱动器50、电源60、信号接口70、伽马转换器80及时序控制器90，所述信号接口60电性连接电源60及时序控制器90，其从接收外界电压信号及低电压差分信号（Low-Voltage Differential Signaling，LVDS），并将电压信号输入至电源60，将LVDS信号输入给时序控制器90；所述时序控制器90电性连接电源60、信号接口70、源极驱动器50及栅极驱动器40，其从电源60接收供电电压，从信号接口60接收LVDS信号，产生迷你（Mini）LVDS信号给源极驱动器50，产生时钟信号给栅极驱动器40；所述伽马转换器80电性连接电源60及源极驱动器50，其从电源60接收公共电压，并产生伽马电压给源极驱动器50；所述源极驱动器50电性连接电源60、显示像素单元10及测试像素单元30，其向显示像素单元10及测试像素单元30输出数据信号Data；所述栅极驱动器40电性连接电源60、显示像素单元10及测试像素单元30，其向显示像素单元10及测试像素单元30输出扫描信号Gate。Further, as shown in FIG. 2, the AMOLED display device further includes: a gate driver 40, a source driver 50, a power source 60, a signal interface 70, a gamma converter 80, and a timing controller 90. The signal interface 60 is electrically connected to the power supply 60 and the timing controller 90, which receives external voltage signals and low-voltage differential signals (Low-Voltage Differential Signaling, LVDS), and input voltage signals to the power supply 60, and input LVDS signals to the timing controller 90; the timing controller 90 is electrically connected to the power supply 60, the signal interface 70, the source driver 50, and the gate driver 40 It receives the power supply voltage from the power supply 60, receives the LVDS signal from the signal interface 60, generates a Mini LVDS signal to the source driver 50, and generates a clock signal to the gate driver 40; the gamma converter 80 is electrically connected to the power supply 60 and the source driver 50, which receive a common voltage from the power source 60 and generate a gamma voltage to the source driver 50; the source driver 50 is electrically connected to the power source 60, the display pixel unit 10 and the test pixel unit 30, The display pixel unit 10 and the test pixel unit 30 output data signals Data; the gate driver 40 is electrically connected to the power supply 60, the display pixel unit 10 and the test pixel unit 30, and it outputs scan signals to the display pixel unit 10 and the test pixel unit 30 Gate.
从而，本发明通过设置测试像素单元及阈值电压补偿单元进行阈值电压补偿，能够在有效补偿驱动薄膜晶体管的阈值电压的同时简化补偿电路的结构，提升开口率，降低驱动成本。Therefore, the present invention performs threshold voltage compensation by setting the test pixel unit and the threshold voltage compensation unit, which can effectively compensate the threshold voltage of the driving thin film transistor while simplifying the structure of the compensation circuit, increasing the aperture ratio and reducing the driving cost.
请参阅图6，本发明还提供一种AMOLED显示装置的驱动方法，包括如下步骤：Referring to FIG. 6, the present invention also provides a driving method of an AMOLED display device, including the following steps:
步骤S1、提供一AMOLED显示装置，包括显示像素单元10、与所述显示像素单元10电性连接的阈值电压补偿单元20以及与所述阈值电压补偿单元20电性连接的测试像素单元30。Step S1: Provide an AMOLED display device, including a display pixel unit 10, a threshold voltage compensation unit 20 electrically connected to the display pixel unit 10, and a test pixel unit 30 electrically connected to the threshold voltage compensation unit 20.
具体地，具体地，如图3所示，在本发明的优选实施例中，所述显示像素单元10包括：第一薄膜晶体管T1、第二薄膜晶体管T2、第一电容C1、第二电容C2及显示有机发光二极管D1；Specifically, as shown in FIG. 3, in a preferred embodiment of the present invention, the display pixel unit 10 includes: a first thin film transistor T1, a second thin film transistor T2, a first capacitor C1, a second capacitor C2 And display organic light emitting diode D1;
所述第一薄膜晶体管T1的栅极接收扫描信号Gate，源极接收数据信号Data，漏极电性连接第一节点A；The gate of the first thin film transistor T1 receives the scan signal Gate, the source receives the data signal Data, and the drain is electrically connected to the first node A;
所述第二薄膜晶体管T2的栅极电性连接第一节点A，源极电性连接显示有机发光二极管D1的阳极，漏极接收电源电压Vdd；The gate of the second thin film transistor T2 is electrically connected to the first node A, the source is electrically connected to the anode of the display organic light emitting diode D1, and the drain receives the power supply voltage Vdd;
所述第一电容C1的第一端电性连接第一节点A，第二端接地；The first terminal of the first capacitor C1 is electrically connected to the first node A, and the second terminal is grounded;
所述第二电容C2的第一端接收补偿信号ST，第二端电性连接第一节点A；The first terminal of the second capacitor C2 receives the compensation signal ST, and the second terminal is electrically connected to the first node A;
所述显示有机发光二极管D1的阳极接地。The anode of the display organic light emitting diode D1 is grounded.
进一步地，如图4所示，在本发明的优选实施例中，所述测试像素单元30包括：第三薄膜晶体管T3、第四薄膜晶体管T4、第三电容C3及测试有机发光二极管D2；Further, as shown in FIG. 4, in a preferred embodiment of the present invention, the test pixel unit 30 includes: a third thin film transistor T3, a fourth thin film transistor T4, a third capacitor C3 and a test organic light emitting diode D2;
所述第三薄膜晶体管T3的栅极接收扫描信号Gate，源极接收数据信号Data，漏极电性连接第二节点B；The gate of the third thin film transistor T3 receives the scan signal Gate, the source receives the data signal Data, and the drain is electrically connected to the second node B;
所述第四薄膜晶体管T4的栅极电性连接第二节点B，源极电性连接测试有机发光二极管D2的阳极，漏极接收电源电压Vdd；The gate of the fourth thin film transistor T4 is electrically connected to the second node B, the source is electrically connected to the anode of the test organic light emitting diode D2, and the drain receives the power supply voltage Vdd;
所述第三电容C3的第一端电性连接第二节点B，第二端接地；The first terminal of the third capacitor C3 is electrically connected to the second node B, and the second terminal is grounded;
所述测试有机发光二极管D2的阳极接地。The anode of the test organic light emitting diode D2 is grounded.
需要说明的是，第一薄膜晶体管T1、第二薄膜晶体管T2、第一电容C1及显示有机发光二极管D1分别与第三薄膜晶体管T3、第四薄膜晶体管T4、第三电容C3及测试有机发光二极管D2的电学性能相同，从而能够通过测试像素单元30反应出显示像素单元10中的阈值电压漂移。It should be noted that the first thin film transistor T1, the second thin film transistor T2, the first capacitor C1, and the display organic light emitting diode D1 are respectively connected with the third thin film transistor T3, the fourth thin film transistor T4, the third capacitor C3 and the test organic light emitting diode. The electrical performance of D2 is the same, so that the threshold voltage drift in the display pixel unit 10 can be reflected by the test pixel unit 30.
具体地，所述阈值电压补偿单元20电性连接所述第四薄膜晶体管T4的源极。Specifically, the threshold voltage compensation unit 20 is electrically connected to the source of the fourth thin film transistor T4.
具体地，所述显示像素单元10设于所述AMOLED显示装置的有效显示区1内，所述阈值电压补偿单元20及测试像素单元30设于所述AMOLED显示装置包围所述有效显示区1的非显示区2内，通过测试像素单元30及阈值电压补偿单元20配合完成显示像素单元10的阈值电压补偿，相比于在显示像素单元10增加补偿TFT构成补偿电路，能够简化显示像素单元10的电路结构，提升显示像素单元10的开口率及驱动成本，改善显示效果。Specifically, the display pixel unit 10 is arranged in the effective display area 1 of the AMOLED display device, and the threshold voltage compensation unit 20 and the test pixel unit 30 are arranged in the AMOLED display device surrounding the effective display area 1. In the non-display area 2, the test pixel unit 30 and the threshold voltage compensation unit 20 cooperate to complete the threshold voltage compensation of the display pixel unit 10. Compared with adding a compensation TFT to the display pixel unit 10 to form a compensation circuit, the display pixel unit 10 can be simplified. The circuit structure increases the aperture ratio and driving cost of the display pixel unit 10, and improves the display effect.
进一步地，如图2所示，所述AMOLED显示装置，还包括：栅极驱动器40、源极驱动器50、电源60、信号接口70、伽马转换器80及时序控制器90，所述信号接口60电性连接电源60及时序控制器90，其从接收外界电压信号及低电压差分信号（Low-Voltage Differential Signaling，LVDS），并将电压信号输入至电源60，将LVDS信号输入给时序控制器90；所述时序控制器90电性连接电源60、信号接口70、源极驱动器50及栅极驱动器40，其从电源60接收供电电压，从信号接口60接收LVDS信号，产生迷你（Mini）LVDS信号给源极驱动器50，产生时钟信号给栅极驱动器40；所述伽马转换器80电性连接电源60及源极驱动器50，其从电源60接收公共电压，并产生伽马电压给源极驱动器50；所述源极驱动器50电性连接电源60、显示像素单元10及测试像素单元30，其向显示像素单元10及测试像素单元30输出数据信号Data；所述栅极驱动器40电性连接电源60、显示像素单元10及测试像素单元30，其向显示像素单元10及测试像素单元30输出扫描信号Gate。Further, as shown in FIG. 2, the AMOLED display device further includes: a gate driver 40, a source driver 50, a power source 60, a signal interface 70, a gamma converter 80, and a timing controller 90. The signal interface 60 is electrically connected to the power supply 60 and the timing controller 90, which receives external voltage signals and low-voltage differential signals (Low-Voltage Differential Signaling, LVDS), and input voltage signals to the power supply 60, and input LVDS signals to the timing controller 90; the timing controller 90 is electrically connected to the power supply 60, the signal interface 70, the source driver 50, and the gate driver 40 It receives the power supply voltage from the power supply 60, receives the LVDS signal from the signal interface 60, generates a Mini LVDS signal to the source driver 50, and generates a clock signal to the gate driver 40; the gamma converter 80 is electrically connected to the power supply 60 and the source driver 50, which receive a common voltage from the power source 60 and generate a gamma voltage to the source driver 50; the source driver 50 is electrically connected to the power source 60, the display pixel unit 10 and the test pixel unit 30, The display pixel unit 10 and the test pixel unit 30 output data signals Data; the gate driver 40 is electrically connected to the power supply 60, the display pixel unit 10 and the test pixel unit 30, and it outputs scan signals to the display pixel unit 10 and the test pixel unit 30 Gate.
步骤S2、向所述显示像素单元10及测试像素单元30输入扫描信号Gate及数据信号Data，驱动所述显示像素单元10及测试像素单元30发光。Step S2: Input the scan signal Gate and the data signal Data to the display pixel unit 10 and the test pixel unit 30, and drive the display pixel unit 10 and the test pixel unit 30 to emit light.
具体地，所述步骤S2中，所述扫描信号Gate控制第一薄膜晶体管T1及第三薄膜晶体管T3打开，数据信号Data对第一电容C1及第三电容C3充电，使得第一节点A和第二节点B的电压上升，第二及第四薄膜晶体管T4打开，显示有机发光二极管D1及测试有机发光二极管D2开始发光。Specifically, in the step S2, the scan signal Gate controls the first thin film transistor T1 and the third thin film transistor T3 to turn on, and the data signal Data charges the first capacitor C1 and the third capacitor C3, so that the first node A and the The voltage of the two nodes B rises, the second and fourth thin film transistors T4 are turned on, indicating that the organic light emitting diode D1 and the test organic light emitting diode D2 start to emit light.
步骤S3、阈值电压补偿单元20侦测流过测试像素单元30的电流，并比较流过测试像素单元30的电流与预设的标准电流，根据比较结果输出用于补偿显示像素单元10的阈值电压的补偿信号ST；Step S3: The threshold voltage compensation unit 20 detects the current flowing through the test pixel unit 30, compares the current flowing through the test pixel unit 30 with a preset standard current, and outputs a threshold voltage for compensating the display pixel unit 10 according to the comparison result The compensation signal ST;
具体地，所述步骤S3中，所述阈值电压补偿单元20从第四薄膜晶体管T4的源极侦测流过测试像素单元30的电流，并比较流过测试像素单元30的电流与预设的标准电流，根据比较结果输出补偿信号ST。Specifically, in the step S3, the threshold voltage compensation unit 20 detects the current flowing through the test pixel unit 30 from the source of the fourth thin film transistor T4, and compares the current flowing through the test pixel unit 30 with a preset The standard current outputs a compensation signal ST according to the comparison result.
举例说明，当阈值电压补偿单元20根据流过测试像素单元30的电流与预设的标准电流的比较结果确定驱动薄膜晶体管即第二薄膜晶体管T2的阈值电压的漂移量为ΔVth时，所述阈值电压补偿单元20输出的补偿信号ST的电压大小为：For example, when the threshold voltage compensation unit 20 determines that the threshold voltage drift of the driving thin film transistor, that is, the second thin film transistor T2, is ΔVth according to the comparison result of the current flowing through the test pixel unit 30 and the preset standard current, the threshold The voltage magnitude of the compensation signal ST output by the voltage compensation unit 20 is:
Figure 69786dest_path_image002
Figure 69786dest_path_image002
其中，ΔV为补偿信号ST的电压大小，C2为第一电容C2的大小，C1为第一电容C1的大小，Cgd1为第一薄膜晶体管T1的栅极与漏极之间的寄生电容，Cgd2为第二薄膜晶体管T2的栅极与漏极之间的寄生电容，Cgs2为第二薄膜晶体管T2的栅极与源极之间的寄生电容。Where ΔV is the voltage of the compensation signal ST, C2 is the size of the first capacitor C2, C1 is the size of the first capacitor C1, Cgd1 is the parasitic capacitance between the gate and drain of the first thin film transistor T1, and Cgd2 is The parasitic capacitance between the gate and drain of the second thin film transistor T2, Cgs2 is the parasitic capacitance between the gate and the source of the second thin film transistor T2.
步骤S4、所述显示像素单元10接收补偿信号ST，并利用所述补偿信号ST完成阈值电压补偿。Step S4: The display pixel unit 10 receives the compensation signal ST, and uses the compensation signal ST to complete threshold voltage compensation.
具体地，所述步骤S4中，所述第二电容C2的第一端接收补偿信号ST，使得第一节点A的电压继续上升，以补偿第二薄膜晶体管T2的阈值电压偏移。Specifically, in the step S4, the first end of the second capacitor C2 receives the compensation signal ST, so that the voltage of the first node A continues to rise to compensate for the threshold voltage shift of the second thin film transistor T2.
综上所述，本发明提供了一种AMOLED显示装置，包括显示像素单元、与所述显示像素单元电性连接的阈值电压补偿单元以及与所述阈值电压补偿单元电性连接的测试像素单元；所述显示像素单元及测试像素单元用于接收扫描信号及数据信号，并在扫描信号及数据信号的驱动下发光；所述阈值电压补偿单元用于侦测流过测试像素单元的电流，并比较流过测试像素单元的电流与预设的标准电流，以及根据比较结果向显示像素单元输出向补偿信号，以对所述显示像素单元进行阈值电压补偿，通过设置测试像素单元及阈值电压补偿单元进行阈值电压补偿，能够在有效补偿驱动薄膜晶体管的阈值电压的同时简化补偿电路的结构，提升开口率，降低驱动成本。本发明还提供一种AMOLED显示装置的驱动方法，能够在有效补偿驱动薄膜晶体管的阈值电压的同时简化补偿电路的结构，提升开口率，降低驱动成本。In summary, the present invention provides an AMOLED display device including a display pixel unit, a threshold voltage compensation unit electrically connected to the display pixel unit, and a test pixel unit electrically connected to the threshold voltage compensation unit; The display pixel unit and the test pixel unit are used to receive scan signals and data signals, and emit light under the drive of the scan signals and data signals; the threshold voltage compensation unit is used to detect the current flowing through the test pixel unit and compare The current flowing through the test pixel unit and the preset standard current, and output a compensation signal to the display pixel unit according to the comparison result, to perform threshold voltage compensation on the display pixel unit, by setting the test pixel unit and the threshold voltage compensation unit to perform Threshold voltage compensation can effectively compensate the threshold voltage of the driving thin film transistor while simplifying the structure of the compensation circuit, increasing the aperture ratio and reducing the driving cost. The present invention also provides a driving method of an AMOLED display device, which can effectively compensate the threshold voltage of the driving thin film transistor while simplifying the structure of the compensation circuit, increasing the aperture ratio and reducing the driving cost.
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。As mentioned above, for those of ordinary skill in the art, various other corresponding changes and modifications can be made according to the technical solutions and technical ideas of the present invention, and all these changes and modifications shall fall within the protection scope of the claims of the present invention. .

Claims (10)

  1. 一种AMOLED显示装置，包括显示像素单元、与所述显示像素单元电性连接的阈值电压补偿单元以及与所述阈值电压补偿单元电性连接的测试像素单元；An AMOLED display device, comprising a display pixel unit, a threshold voltage compensation unit electrically connected to the display pixel unit, and a test pixel unit electrically connected to the threshold voltage compensation unit;
    所述显示像素单元及测试像素单元用于接收扫描信号及数据信号，并在扫描信号及数据信号的驱动下发光；The display pixel unit and the test pixel unit are used to receive scan signals and data signals, and emit light under the drive of the scan signals and data signals;
    所述阈值电压补偿单元用于侦测流过测试像素单元的电流，并比较流过测试像素单元的电流与预设的标准电流，以及根据比较结果向显示像素单元输出向补偿信号，以对所述显示像素单元进行阈值电压补偿。The threshold voltage compensation unit is used to detect the current flowing through the test pixel unit, compare the current flowing through the test pixel unit with a preset standard current, and output a compensation signal to the display pixel unit according to the comparison result, so as to The display pixel unit performs threshold voltage compensation.
  2. 如权利要求1所述的AMOLED显示装置，其中，所述显示像素单元包括：第一薄膜晶体管、第二薄膜晶体管、第一电容、第二电容及显示有机发光二极管；3. The AMOLED display device of claim 1, wherein the display pixel unit comprises: a first thin film transistor, a second thin film transistor, a first capacitor, a second capacitor, and a display organic light emitting diode;
    所述第一薄膜晶体管的栅极接收扫描信号，源极接收数据信号，漏极电性连接第一节点；The gate of the first thin film transistor receives the scan signal, the source receives the data signal, and the drain is electrically connected to the first node;
    所述第二薄膜晶体管的栅极电性连接第一节点，源极电性连接显示有机发光二极管的阳极，漏极接收电源电压；The gate of the second thin film transistor is electrically connected to the first node, the source is electrically connected to the anode of the display organic light emitting diode, and the drain receives the power supply voltage;
    所述第一电容的第一端电性连接第一节点，第二端接地；The first terminal of the first capacitor is electrically connected to the first node, and the second terminal is grounded;
    所述第二电容的第一端接收补偿信号，第二端电性连接第一节点；The first terminal of the second capacitor receives the compensation signal, and the second terminal is electrically connected to the first node;
    所述显示有机发光二极管的阳极接地。The anode of the display organic light emitting diode is grounded.
  3. 如权利要求2所述的AMOLED显示装置，其中，所述测试像素单元包括：第三薄膜晶体管、第四薄膜晶体管、第三电容及测试有机发光二极管；3. The AMOLED display device of claim 2, wherein the test pixel unit comprises: a third thin film transistor, a fourth thin film transistor, a third capacitor, and a test organic light emitting diode;
    所述第三薄膜晶体管的栅极接收扫描信号，源极接收数据信号，漏极电性连接第二节点；The gate of the third thin film transistor receives the scan signal, the source receives the data signal, and the drain is electrically connected to the second node;
    所述第四薄膜晶体管的栅极电性连接第二节点，源极电性连接测试有机发光二极管的阳极，漏极接收电源电压；The gate of the fourth thin film transistor is electrically connected to the second node, the source is electrically connected to the anode of the test organic light emitting diode, and the drain receives the power supply voltage;
    所述第三电容的第一端电性连接第二节点，第二端接地；The first terminal of the third capacitor is electrically connected to the second node, and the second terminal is grounded;
    所述测试有机发光二极管的阳极接地。The anode of the test organic light emitting diode is grounded.
  4. 如权利要求3所述的AMOLED显示装置，其中，所述阈值电压补偿单元电性连接所述第四薄膜晶体管的源极。3. The AMOLED display device of claim 3, wherein the threshold voltage compensation unit is electrically connected to the source of the fourth thin film transistor.
  5. 如权利要求1所述的AMOLED显示装置，其中，所述显示像素单元设于所述AMOLED显示装置的有效显示区内，所述阈值电压补偿单元及测试像素单元设于所述AMOLED显示装置包围所述有效显示区的非显示区内。The AMOLED display device according to claim 1, wherein the display pixel unit is arranged in an effective display area of the AMOLED display device, and the threshold voltage compensation unit and the test pixel unit are arranged in the surrounding area of the AMOLED display device. The non-display area of the effective display area.
  6. 一种AMOLED显示装置的驱动方法，包括如下步骤：A driving method of an AMOLED display device includes the following steps:
    步骤S1、提供一AMOLED显示装置，包括显示像素单元、与所述显示像素单元电性连接的阈值电压补偿单元以及与所述阈值电压补偿单元电性连接的测试像素单元；Step S1: Provide an AMOLED display device, including a display pixel unit, a threshold voltage compensation unit electrically connected to the display pixel unit, and a test pixel unit electrically connected to the threshold voltage compensation unit;
    步骤S2、向所述显示像素单元及测试像素单元输入扫描信号及数据信号，驱动所述显示像素单元及测试像素单元发光；Step S2: Input scan signals and data signals to the display pixel unit and the test pixel unit, and drive the display pixel unit and the test pixel unit to emit light;
    步骤S3、阈值电压补偿单元侦测流过测试像素单元的电流，并比较流过测试像素单元的电流与预设的标准电流，根据比较结果输出用于补偿显示像素单元的阈值电压的补偿信号；Step S3: The threshold voltage compensation unit detects the current flowing through the test pixel unit, compares the current flowing through the test pixel unit with a preset standard current, and outputs a compensation signal for compensating the threshold voltage of the display pixel unit according to the comparison result;
    步骤S4、所述显示像素单元接收补偿信号，并利用所述补偿信号完成阈值电压补偿。Step S4: The display pixel unit receives a compensation signal, and uses the compensation signal to complete threshold voltage compensation.
  7. 如权利要求6所述的AMOLED显示装置的驱动方法，其中，所述步骤S1中，显示像素单元包括：第一薄膜晶体管、第二薄膜晶体管、第一电容、第二电容及显示有机发光二极管；7. The method for driving an AMOLED display device according to claim 6, wherein in said step S1, the display pixel unit comprises: a first thin film transistor, a second thin film transistor, a first capacitor, a second capacitor, and a display organic light emitting diode;
    所述第一薄膜晶体管的栅极接收扫描信号，源极接收数据信号，漏极电性连接第一节点；The gate of the first thin film transistor receives the scan signal, the source receives the data signal, and the drain is electrically connected to the first node;
    所述第二薄膜晶体管的栅极电性连接第一节点，源极电性连接显示有机发光二极管的阳极，漏极接收电源电压；The gate of the second thin film transistor is electrically connected to the first node, the source is electrically connected to the anode of the display organic light emitting diode, and the drain receives the power supply voltage;
    所述第一电容的第一端电性连接第一节点，第二端接地；The first terminal of the first capacitor is electrically connected to the first node, and the second terminal is grounded;
    所述第二电容的第一端接收补偿信号，第二端电性连接第一节点；The first terminal of the second capacitor receives the compensation signal, and the second terminal is electrically connected to the first node;
    所述显示有机发光二极管的阳极接地。The anode of the display organic light emitting diode is grounded.
  8. 如权利要求7所述的AMOLED显示装置的驱动方法，其中，所述步骤S1中，所述测试像素单元包括：第三薄膜晶体管、第四薄膜晶体管、第三电容及测试有机发光二极管；8. The method for driving an AMOLED display device according to claim 7, wherein in the step S1, the test pixel unit includes: a third thin film transistor, a fourth thin film transistor, a third capacitor, and a test organic light emitting diode;
    所述第三薄膜晶体管的栅极接收扫描信号，源极接收数据信号，漏极电性连接第二节点；The gate of the third thin film transistor receives the scan signal, the source receives the data signal, and the drain is electrically connected to the second node;
    所述第四薄膜晶体管的栅极电性连接第二节点，源极电性连接测试有机发光二极管的阳极，漏极接收电源电压；The gate of the fourth thin film transistor is electrically connected to the second node, the source is electrically connected to the anode of the test organic light emitting diode, and the drain receives the power supply voltage;
    所述第三电容的第一端电性连接第二节点，第二端接地；The first terminal of the third capacitor is electrically connected to the second node, and the second terminal is grounded;
    所述测试有机发光二极管的阳极接地；所述阈值电压补偿单元电性连接所述第四薄膜晶体管的源极。The anode of the test organic light emitting diode is grounded; the threshold voltage compensation unit is electrically connected to the source of the fourth thin film transistor.
  9. 如权利要求8所述的AMOLED显示装置的驱动方法，其中，8. The method for driving an AMOLED display device according to claim 8, wherein:
    所述步骤S2中，所述扫描信号控制第一薄膜晶体管及第三薄膜晶体管打开，数据信号对第一电容及第三电容充电，使得第一节点和第二节点的电压上升，第二及第四薄膜晶体管打开，显示有机发光二极管及测试有机发光二极管开始发光；In the step S2, the scan signal controls the first thin film transistor and the third thin film transistor to turn on, and the data signal charges the first capacitor and the third capacitor so that the voltages of the first node and the second node rise, and the second and Four thin film transistors are turned on, indicating that the organic light-emitting diode and the test organic light-emitting diode start to emit light;
    所述步骤S3中，所述阈值电压补偿单元从第四薄膜晶体管的源极侦测流过测试像素单元的电流，并比较流过测试像素单元的电流与预设的标准电流，根据比较结果输出补偿信号；In the step S3, the threshold voltage compensation unit detects the current flowing through the test pixel unit from the source of the fourth thin film transistor, compares the current flowing through the test pixel unit with a preset standard current, and outputs according to the comparison result Compensation signal
    所述步骤S4中，所述第二电容的第一端接收补偿信号，使得第一节点的电压继续上升，以补偿第二薄膜晶体管的阈值电压偏移。In the step S4, the first terminal of the second capacitor receives the compensation signal, so that the voltage of the first node continues to rise to compensate for the threshold voltage shift of the second thin film transistor.
  10. 如权利要求8所述的AMOLED显示装置的驱动方法，其中，所述步骤S1中，所述显示像素单元设于所述AMOLED显示装置的有效显示区内，所述阈值电压补偿单元及测试像素单元设于所述AMOLED显示装置包围所述有效显示区的非显示区内。8. The method for driving an AMOLED display device according to claim 8, wherein in the step S1, the display pixel unit is arranged in an effective display area of the AMOLED display device, and the threshold voltage compensation unit and the test pixel unit It is arranged in a non-display area of the AMOLED display device surrounding the effective display area.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113487994A (en) * 2021-06-16 2021-10-08 中国科学院微电子研究所 Pixel circuit, display device and pixel compensation method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111179842B (en) * 2020-03-12 2021-03-30 京东方科技集团股份有限公司 Compensation circuit, display module and driving method thereof
CN111627375B (en) * 2020-05-29 2022-02-08 上海天马微电子有限公司 Driving circuit, driving method thereof and display device
CN112599078B (en) * 2020-12-17 2022-03-01 北京大学深圳研究生院 Pixel unit and pixel external analog domain compensation display system
CN115331613A (en) * 2022-08-15 2022-11-11 惠科股份有限公司 Driving circuit, driving method and display device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102222468A (en) * 2011-06-23 2011-10-19 华南理工大学 Alternating-current pixel driving circuit and method for active organic light-emitting diode (OLED) display
CN102654973A (en) * 2011-08-15 2012-09-05 京东方科技集团股份有限公司 Pixel circuit and drive method thereof as well as display panel
KR20150141368A (en) * 2014-06-10 2015-12-18 네오뷰코오롱 주식회사 Apparatuse and method for compensation luminance difference of organic light-emitting display device
CN105243994A (en) * 2015-11-11 2016-01-13 深圳市华星光电技术有限公司 AMOLED drive system and drive method
CN208271546U (en) * 2018-05-14 2018-12-21 昆山国显光电有限公司 Array substrate, display screen and display device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101448006B1 (en) * 2008-02-14 2014-10-13 삼성디스플레이 주식회사 Liquid crystal display
CN103681772B (en) * 2013-12-27 2018-09-11 京东方科技集团股份有限公司 A kind of array substrate and display device
CN105280139B (en) * 2015-11-11 2018-05-01 深圳市华星光电技术有限公司 AMOLED luminance compensation methods and AMOLED drive systems
CN107068054A (en) * 2017-04-25 2017-08-18 深圳市华星光电技术有限公司 A kind of drive circuit and liquid crystal display
CN108470534B (en) * 2018-05-25 2023-08-04 南京微芯华谱信息科技有限公司 Pixel unit circuit applied to self-luminescence, test circuit and test method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102222468A (en) * 2011-06-23 2011-10-19 华南理工大学 Alternating-current pixel driving circuit and method for active organic light-emitting diode (OLED) display
CN102654973A (en) * 2011-08-15 2012-09-05 京东方科技集团股份有限公司 Pixel circuit and drive method thereof as well as display panel
KR20150141368A (en) * 2014-06-10 2015-12-18 네오뷰코오롱 주식회사 Apparatuse and method for compensation luminance difference of organic light-emitting display device
CN105243994A (en) * 2015-11-11 2016-01-13 深圳市华星光电技术有限公司 AMOLED drive system and drive method
CN208271546U (en) * 2018-05-14 2018-12-21 昆山国显光电有限公司 Array substrate, display screen and display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113487994A (en) * 2021-06-16 2021-10-08 中国科学院微电子研究所 Pixel circuit, display device and pixel compensation method

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