WO2017128465A1 - 像素补偿电路、扫描驱动电路及平面显示装置 - Google Patents

像素补偿电路、扫描驱动电路及平面显示装置 Download PDF

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Publication number
WO2017128465A1
WO2017128465A1 PCT/CN2016/074529 CN2016074529W WO2017128465A1 WO 2017128465 A1 WO2017128465 A1 WO 2017128465A1 CN 2016074529 W CN2016074529 W CN 2016074529W WO 2017128465 A1 WO2017128465 A1 WO 2017128465A1
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WO
WIPO (PCT)
Prior art keywords
controllable switch
capacitor
switch
driving
control
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Application number
PCT/CN2016/074529
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English (en)
French (fr)
Inventor
蔡玉莹
柯凯元
Original Assignee
深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US15/024,578 priority Critical patent/US10192482B2/en
Publication of WO2017128465A1 publication Critical patent/WO2017128465A1/zh

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Classifications

    • 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]
    • G09G3/3266—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
    • 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
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0852—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
    • G—PHYSICS
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0283—Arrangement of drivers for different directions of scanning
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a pixel compensation circuit, a scan driving circuit, and a flat display device.
  • the diode, OLED has the advantages of small size, simple structure, autonomous illumination, high brightness, large viewing angle and short response time, which attracts extensive attention.
  • the voltage signal outputted by the first voltage terminal and the data voltage signal output by the data line are complicated, which adversely affects the operation of the circuit.
  • the technical problem to be solved by the present invention is to provide a pixel compensation circuit, a scan driving circuit and a flat display device to reduce the complexity of the first voltage signal outputted by the first voltage terminal and the data voltage signal output by the data line in the pixel compensation circuit. Degree, which is good for circuit work.
  • a technical solution adopted by the present invention is to provide a pixel compensation circuit, including:
  • the first controllable switch includes a control end, a first end, and a second end, wherein the control end of the first controllable switch is connected to a first scan line, and the first controllable switch The first end is connected to a data line to receive a data voltage from the data line;
  • a driving switch the driving end, the first end and the second end, the control end of the driving switch is connected to the second end of the first controllable switch, and the first end of the driving switch is connected to the first end a voltage terminal;
  • the second controllable switch includes a control end, a first end and a second end, wherein the control end of the second controllable switch is connected to a second scan line, and the second controllable switch The first end is connected to the second end of the driving switch;
  • An organic light emitting diode comprising an anode and a cathode, an anode of the organic light emitting diode is connected to a second end of the second controllable switch, and a cathode of the organic light emitting diode is grounded;
  • the first capacitor includes a first end and a second end, a first end of the first capacitor is connected to a control end of the driving switch, and a second end of the first capacitor is connected to the second end a first end of the controllable switch;
  • the second capacitor includes a first end and a second end, and the first end of the second capacitor is connected to the first end of the second controllable switch and the second end of the first capacitor, The second end of the second capacitor is connected to a second voltage terminal.
  • the driving switch, the first controllable switch, and the second controllable switch are all NMOS type thin film transistors or all PMOS type thin film transistors or a combination of NMOS type thin film transistors and PMOS type thin film transistors.
  • the control terminal, the first terminal and the second terminal of the driving switch, the first controllable switch and the second controllable switch respectively correspond to a gate, a drain and a source of the thin film transistor.
  • another technical solution adopted by the present invention is to provide a scan driving circuit, the scan driving circuit includes a pixel compensation circuit, and the pixel compensation circuit includes:
  • the first controllable switch includes a control end, a first end, and a second end, wherein the control end of the first controllable switch is connected to a first scan line, and the first controllable switch The first end is connected to a data line to receive a data voltage from the data line;
  • a driving switch the driving end, the first end and the second end, the control end of the driving switch is connected to the second end of the first controllable switch, and the first end of the driving switch is connected to the first end a voltage terminal;
  • the second controllable switch includes a control end, a first end and a second end, wherein the control end of the second controllable switch is connected to a second scan line, and the second controllable switch The first end is connected to the second end of the driving switch;
  • An organic light emitting diode comprising an anode and a cathode, an anode of the organic light emitting diode is connected to a second end of the second controllable switch, and a cathode of the organic light emitting diode is grounded;
  • the first capacitor includes a first end and a second end, a first end of the first capacitor is connected to a control end of the driving switch, and a second end of the first capacitor is connected to the second end a first end of the controllable switch;
  • the second capacitor includes a first end and a second end, and the first end of the second capacitor is connected to the first end of the second controllable switch and the second end of the first capacitor, The second end of the second capacitor is connected to a second voltage terminal.
  • the driving switch, the first controllable switch, and the second controllable switch are all NMOS type thin film transistors or all PMOS type thin film transistors or a combination of NMOS type thin film transistors and PMOS type thin film transistors.
  • the control terminal, the first terminal and the second terminal of the driving switch, the first controllable switch and the second controllable switch respectively correspond to a gate, a drain and a source of the thin film transistor.
  • the flat display device includes a pixel compensation circuit, and the pixel compensation circuit includes:
  • the first controllable switch includes a control end, a first end, and a second end, wherein the control end of the first controllable switch is connected to a first scan line, and the first controllable switch The first end is connected to a data line to receive a data voltage from the data line;
  • a driving switch the driving end, the first end and the second end, the control end of the driving switch is connected to the second end of the first controllable switch, and the first end of the driving switch is connected to the first end a voltage terminal;
  • the second controllable switch includes a control end, a first end and a second end, wherein the control end of the second controllable switch is connected to a second scan line, and the second controllable switch The first end is connected to the second end of the driving switch;
  • An organic light emitting diode comprising an anode and a cathode, an anode of the organic light emitting diode is connected to a second end of the second controllable switch, and a cathode of the organic light emitting diode is grounded;
  • the first capacitor includes a first end and a second end, a first end of the first capacitor is connected to a control end of the driving switch, and a second end of the first capacitor is connected to the second end a first end of the controllable switch;
  • the second capacitor includes a first end and a second end, and the first end of the second capacitor is connected to the first end of the second controllable switch and the second end of the first capacitor, The second end of the second capacitor is connected to a second voltage terminal.
  • the driving switch, the first controllable switch, and the second controllable switch are all NMOS type thin film transistors or all PMOS type thin film transistors or a combination of NMOS type thin film transistors and PMOS type thin film transistors.
  • the control terminal, the first terminal and the second terminal of the driving switch, the first controllable switch and the second controllable switch respectively correspond to a gate, a drain and a source of the thin film transistor.
  • the flat display device is an OLED or an LCD.
  • the pixel compensation circuit of the present invention reduces the use by using the second controllable switch, the second capacitor and the second voltage terminal The complexity of the first voltage signal outputted by the first voltage terminal and the data voltage signal output by the data line in the pixel compensation circuit to operate with the circuit.
  • FIG. 1 is a schematic structural view of a pixel compensation circuit of the prior art
  • FIG. 2 is a waveform diagram of a pixel compensation circuit of the prior art
  • FIG. 3 is a simulation result diagram of a pixel compensation circuit of the prior art
  • FIG. 4 is a schematic structural diagram of a pixel compensation circuit of the present invention.
  • Figure 5 is a waveform diagram of a pixel compensation circuit of the present invention.
  • FIG. 6 is a simulation result diagram of a pixel compensation circuit of the present invention.
  • Figure 7 is a schematic view of a scan driving circuit of the present invention.
  • Figure 8 is a schematic illustration of a flat display device of the present invention.
  • the pixel compensation circuit of the prior art includes two thin film transistors and a storage capacitor.
  • the pixel compensation circuit has a current flowing through the organic light emitting diode during the compensation phase.
  • FIG. 2 The voltage VDD signal outputted by the first voltage terminal of the pixel compensation circuit is complicated and there is a delay condition, and the data voltage Vdata has an influence on the voltage of the second end of the driving transistor, and the data voltage Vdata signal is complicated.
  • FIG. 4 is a schematic structural diagram of a pixel compensation circuit of the present invention.
  • the pixel compensation circuit of the present invention includes a first controllable switch T1, the first controllable switch T1 includes a control end, a first end and a second end, and the control of the first controllable switch T1
  • the first control line T1 is connected to a data line Data to receive the data voltage Vdata from the data line Data;
  • the driving switch T0 includes a control end, a first end and a second end, and a control end of the driving switch T0 is connected to a second end of the first controllable switch T1, and the driving switch T0 is One end is connected to a first voltage terminal VDD1;
  • the second controllable switch T2 includes a control end, a first end and a second end, and a control end of the second controllable switch T2 is coupled to a second scan line Vg1, the second The first end of the controllable switch T2 is connected to the second end of the driving switch T0;
  • An organic light emitting diode D1 the organic light emitting diode D1 includes an anode and a cathode, an anode of the organic light emitting diode D1 is connected to a second end of the second controllable switch T2, and a cathode of the organic light emitting diode D1 is grounded;
  • the first capacitor C1 includes a first end and a second end, a first end of the first capacitor C1 is connected to a control end of the driving switch T0, and a second end of the first capacitor C1 is Connecting the first end of the second controllable switch T2;
  • the second capacitor C2 includes a first end and a second end, and the first end of the second capacitor C2 is connected to the first end of the second controllable switch T2 and the first capacitor C1 The second end of the second capacitor C2 is connected to a second voltage terminal R.
  • the driving switch T0, the first controllable switch T1, and the second controllable switch T2 are all NMOS type thin film transistors or all PMOS type thin film transistors or NMOS type thin film transistors and PMOS a combination of a thin film transistor, a control terminal, a first end, and a second end of the driving switch T0, the first controllable switch T1, and the second controllable switch T2 respectively corresponding to a gate of the thin film transistor, Drain and source.
  • FIG. 5 and FIG. 6 are waveform diagrams of the pixel compensation circuit of the present invention.
  • the second controllable switch T2 prevents current from flowing through the organic light emitting diode D1 during the compensation phase, and it can be seen from FIG. 4 that the complexity of the voltage VDD signal is reduced.
  • the second capacitor C2 and the second voltage terminal R are regulated by the second capacitor C2 and the second voltage terminal R, as can also be seen from FIG.
  • the complexity of the data voltage Vdata signal is also reduced.
  • FIG. 7 is a schematic diagram of a scan driving circuit of the present invention.
  • the scan driving circuit includes the pixel compensation circuit for preventing a threshold voltage drift of the driving transistor in the scan driving circuit, thereby causing unevenness of panel brightness display.
  • FIG. 8 is a schematic diagram of a flat display device according to the present invention.
  • the flat display device may be, for example, an OLED or an LCD including the scan drive circuit and the pixel compensation circuit, and the scan drive circuit having the pixel compensation circuit is disposed at the periphery of the flat display device, for example, disposed on the flat display device. Both ends.
  • the pixel compensation circuit reduces a first voltage signal output by the first voltage terminal in the pixel compensation circuit by using the second controllable switch, the second capacitor, and the second voltage terminal The complexity of the data voltage signal output by the data line to operate with the circuit.

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Abstract

一种像素补偿电路、扫描驱动电路及平面显示装置。像素补偿电路中的第一可控开关（T1）的控制端连第一扫描线（Vs1），第一端连接一数据线（Data）以接收数据电压（Vdata）；驱动开关（T0）的控制端连第一可控开关（T1）的第二端，第一端连第一电压端（VDD1）；第二可控开关（T2）的控制端连第二扫描线（Vg1），第一端连驱动开关（T0）的第二端；有机发光二极管（D1）的阳极连第二可控开关（T2）的第二端，阴极接地；驱动开关（T0）的控制端经第一电容（C1）连第二可控开关（T2）的第一端；第二可控开关（T2）的第一端经第二电容（C2）连第二电压端（R）。像素电路能够减小信号复杂度，以利用电路工作。

Description

像素补偿电路、扫描驱动电路及平面显示装置
【技术领域】
本发明涉及显示技术领域，特别是涉及一种像素补偿电路、扫描驱动电路及平面显示装置。
【背景技术】
目前的有机发光二极管（Organic Light Emitting diode，OLED）显示器具有体积小、结构简单、自主发光、亮度高、可视角度大、响应时间短等优点，吸引了广泛的注意。现有的有机发光二极管显示器电路中第一电压端输出的电压信号及数据线输出的数据电压信号复杂，对电路工作产生不利影响。
【发明内容】
本发明主要解决的技术问题是提供一种像素补偿电路、扫描驱动电路及平面显示装置，以减小像素补偿电路中第一电压端输出的第一电压信号及数据线输出的数据电压信号的复杂度，利于电路工作。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种像素补偿电路，包括：
第一可控开关，所述第一可控开关包括控制端、第一端及第二端，所述第一可控开关的控制端连接一第一扫描线，所述第一可控开关的第一端连接一数据线以从所述数据线接收数据电压；
驱动开关，所述驱动开关包括控制端、第一端及第二端，所述驱动开关的控制端连接所述第一可控开关的第二端，所述驱动开关的第一端连接一第一电压端；
第二可控开关，所述第二可控开关包括控制端、第一端及第二端，所述第二可控开关的控制端连接一第二扫描线，所述第二可控开关的第一端连接所述驱动开关的第二端；
有机发光二极管，所述有机发光二极管包括阳极及阴极，所述有机发光二极管的阳极连接所述第二可控开关的第二端，所述有机发光二极管的阴极接地；
第一电容，所述第一电容包括第一端及第二端，所述第一电容的第一端连接所述驱动开关的控制端，所述第一电容的第二端连接所述第二可控开关的第一端；及
第二电容，所述第二电容包括第一端及第二端，所述第二电容的第一端连接所述第二可控开关的第一端及所述第一电容的第二端，所述第二电容的第二端连接一第二电压端。
其中，所述驱动开关、所述第一可控开关及所述第二可控开关均为NMOS型薄膜晶体管或均为PMOS型薄膜晶体管或为NMOS型薄膜晶体管与PMOS型薄膜晶体管的组合，所述驱动开关、所述第一可控开关及所述第二可控开关的控制端、第一端及第二端分别对应所述薄膜晶体管的栅极、漏极及源极。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种扫描驱动电路，所述扫描驱动电路包括像素补偿电路，所述像素补偿电路包括：
第一可控开关，所述第一可控开关包括控制端、第一端及第二端，所述第一可控开关的控制端连接一第一扫描线，所述第一可控开关的第一端连接一数据线以从所述数据线接收数据电压；
驱动开关，所述驱动开关包括控制端、第一端及第二端，所述驱动开关的控制端连接所述第一可控开关的第二端，所述驱动开关的第一端连接一第一电压端；
第二可控开关，所述第二可控开关包括控制端、第一端及第二端，所述第二可控开关的控制端连接一第二扫描线，所述第二可控开关的第一端连接所述驱动开关的第二端；
有机发光二极管，所述有机发光二极管包括阳极及阴极，所述有机发光二极管的阳极连接所述第二可控开关的第二端，所述有机发光二极管的阴极接地；
第一电容，所述第一电容包括第一端及第二端，所述第一电容的第一端连接所述驱动开关的控制端，所述第一电容的第二端连接所述第二可控开关的第一端；及
第二电容，所述第二电容包括第一端及第二端，所述第二电容的第一端连接所述第二可控开关的第一端及所述第一电容的第二端，所述第二电容的第二端连接一第二电压端。
其中，所述驱动开关、所述第一可控开关及所述第二可控开关均为NMOS型薄膜晶体管或均为PMOS型薄膜晶体管或为NMOS型薄膜晶体管与PMOS型薄膜晶体管的组合，所述驱动开关、所述第一可控开关及所述第二可控开关的控制端、第一端及第二端分别对应所述薄膜晶体管的栅极、漏极及源极。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种平面显示装置，所述平面显示装置包括像素补偿电路，所述像素补偿电路包括：
第一可控开关，所述第一可控开关包括控制端、第一端及第二端，所述第一可控开关的控制端连接一第一扫描线，所述第一可控开关的第一端连接一数据线以从所述数据线接收数据电压；
驱动开关，所述驱动开关包括控制端、第一端及第二端，所述驱动开关的控制端连接所述第一可控开关的第二端，所述驱动开关的第一端连接一第一电压端；
第二可控开关，所述第二可控开关包括控制端、第一端及第二端，所述第二可控开关的控制端连接一第二扫描线，所述第二可控开关的第一端连接所述驱动开关的第二端；
有机发光二极管，所述有机发光二极管包括阳极及阴极，所述有机发光二极管的阳极连接所述第二可控开关的第二端，所述有机发光二极管的阴极接地；
第一电容，所述第一电容包括第一端及第二端，所述第一电容的第一端连接所述驱动开关的控制端，所述第一电容的第二端连接所述第二可控开关的第一端；及
第二电容，所述第二电容包括第一端及第二端，所述第二电容的第一端连接所述第二可控开关的第一端及所述第一电容的第二端，所述第二电容的第二端连接一第二电压端。
其中，所述驱动开关、所述第一可控开关及所述第二可控开关均为NMOS型薄膜晶体管或均为PMOS型薄膜晶体管或为NMOS型薄膜晶体管与PMOS型薄膜晶体管的组合，所述驱动开关、所述第一可控开关及所述第二可控开关的控制端、第一端及第二端分别对应所述薄膜晶体管的栅极、漏极及源极。
其中，所述平面显示装置为OLED或LCD。
本发明的有益效果是：区别于现有技术的情况，本发明的所述像素补偿电路通过使用所述第二可控开关、所述第二电容及所述第二电压端来减小所述像素补偿电路中所述第一电压端输出的第一电压信号与所述数据线输出的数据电压信号的复杂度，以利用电路工作。
【附图说明】
图1是现有技术的像素补偿电路的结构示意图；
图2是现有技术的像素补偿电路的波形图；
图3是现有技术的像素补偿电路的模拟结果图；
图4是本发明的像素补偿电路的结构示意图；
图5是本发明的像素补偿电路的波形图；
图6是本发明的像素补偿电路的模拟结果图；
图7是本发明的扫描驱动电路的示意图；
图8是本发明的平面显示装置的示意图。
【具体实施方式】
请参阅图1至图3，现有技术的像素补偿电路包括两个薄膜晶体管及一个存储电容，所述像素补偿电路在补偿阶段会有电流流过有机发光二极管，从图2中可以看出所述像素补偿电路的第一电压端输出的电压VDD信号复杂且存在延迟情况，并且数据电压Vdata对驱动晶体管第二端的电压存在影响，所述数据电压Vdata信号复杂。
请参阅图4，是本发明的像素补偿电路的结构示意图。如图4所示，本发明的像素补偿电路包括第一可控开关T1，所述第一可控开关T1包括控制端、第一端及第二端，所述第一可控开关T1的控制端连接一第一扫描线Vs1，所述第一可控开关T1的第一端连接一数据线Data以从所述数据线Data接收数据电压Vdata；
驱动开关T0，所述驱动开关T0包括控制端、第一端及第二端，所述驱动开关T0的控制端连接所述第一可控开关T1的第二端，所述驱动开关T0的第一端连接一第一电压端VDD1；
第二可控开关T2，所述第二可控开关T2包括控制端、第一端及第二端，所述第二可控开关T2的控制端连接一第二扫描线Vg1，所述第二可控开关T2的第一端连接所述驱动开关T0的第二端；
有机发光二极管D1，所述有机发光二极管D1包括阳极及阴极，所述有机发光二极管D1的阳极连接所述第二可控开关T2的第二端，所述有机发光二极管D1的阴极接地；
第一电容C1，所述第一电容C1包括第一端及第二端，所述第一电容C1的第一端连接所述驱动开关T0的控制端，所述第一电容C1的第二端连接所述第二可控开关T2的第一端；及
第二电容C2，所述第二电容C2包括第一端及第二端，所述第二电容C2的第一端连接所述第二可控开关T2的第一端及所述第一电容C1的第二端，所述第二电容C2的第二端连接一第二电压端R。
在本实施方式中，所述驱动开关T0、所述第一可控开关T1及所述第二可控开关T2均为NMOS型薄膜晶体管或均为PMOS型薄膜晶体管或为NMOS型薄膜晶体管与PMOS型薄膜晶体管的组合，所述驱动开关T0、所述第一可控开关T1及所述第二可控开关T2的控制端、第一端及第二端分别对应所述薄膜晶体管的栅极、漏极及源极。
请参阅图5及图6，是本发明所述的像素补偿电路的波形图。如图5及图6所示，通过所述第二可控开关T2防止在补偿阶段有电流流过所述有机发光二极管D1，且从图4可以看出所述电压VDD信号的复杂度减小并且减小了延迟的影响，通过所述第二电容C2及所述第二电压端R调控数据电压Vdata对所述驱动开关T0的第二端的电压的影响，从图4中也可以看出所述数据电压Vdata信号的复杂度也减小。
请参阅图7，为本发明一种扫描驱动电路的示意图。所述扫描驱动电路中包括所述像素补偿电路，用于避免所述扫描驱动电路中的驱动晶体管发生阈值电压漂移，从而造成面板亮度显示不均匀。
请参阅图8，为本发明一种平面显示装置的示意图。所述平面显示装置例如可为OLED或LCD，其包括前述的扫描驱动电路及像素补偿电路，所述具有像素补偿电路的扫描驱动电路设置在所述平面显示装置的周边，例如设置在平面显示装置的两端。
所述像素补偿电路通过使用所述第二可控开关、所述第二电容及所述第二电压端来减小所述像素补偿电路中所述第一电压端输出的第一电压信号与所述数据线输出的数据电压信号的复杂度，以利用电路工作。
以上仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (7)

  1. 一种像素补偿电路，其中，所述像素补偿电路包括：
    第一可控开关，所述第一可控开关包括控制端、第一端及第二端，所述第一可控开关的控制端连接一第一扫描线，所述第一可控开关的第一端连接一数据线以从所述数据线接收数据电压；
    驱动开关，所述驱动开关包括控制端、第一端及第二端，所述驱动开关的控制端连接所述第一可控开关的第二端，所述驱动开关的第一端连接一第一电压端；
    第二可控开关，所述第二可控开关包括控制端、第一端及第二端，所述第二可控开关的控制端连接一第二扫描线，所述第二可控开关的第一端连接所述驱动开关的第二端；
    有机发光二极管，所述有机发光二极管包括阳极及阴极，所述有机发光二极管的阳极连接所述第二可控开关的第二端，所述有机发光二极管的阴极接地；
    第一电容，所述第一电容包括第一端及第二端，所述第一电容的第一端连接所述驱动开关的控制端，所述第一电容的第二端连接所述第二可控开关的第一端；及
    第二电容，所述第二电容包括第一端及第二端，所述第二电容的第一端连接所述第二可控开关的第一端及所述第一电容的第二端，所述第二电容的第二端连接一第二电压端。
  2. 根据权利要求1所述的像素补偿电路，其中，所述驱动开关、所述第一可控开关及所述第二可控开关均为NMOS型薄膜晶体管或均为PMOS型薄膜晶体管或为NMOS型薄膜晶体管与PMOS型薄膜晶体管的组合，所述驱动开关、所述第一可控开关及所述第二可控开关的控制端、第一端及第二端分别对应所述薄膜晶体管的栅极、漏极及源极。
  3. 一种扫描驱动电路，其中，所述扫描驱动电路包括像素补偿电路，所述像素补偿电路包括：
    第一可控开关，所述第一可控开关包括控制端、第一端及第二端，所述第一可控开关的控制端连接一第一扫描线，所述第一可控开关的第一端连接一数据线以从所述数据线接收数据电压；
    驱动开关，所述驱动开关包括控制端、第一端及第二端，所述驱动开关的控制端连接所述第一可控开关的第二端，所述驱动开关的第一端连接一第一电压端；
    第二可控开关，所述第二可控开关包括控制端、第一端及第二端，所述第二可控开关的控制端连接一第二扫描线，所述第二可控开关的第一端连接所述驱动开关的第二端；
    有机发光二极管，所述有机发光二极管包括阳极及阴极，所述有机发光二极管的阳极连接所述第二可控开关的第二端，所述有机发光二极管的阴极接地；
    第一电容，所述第一电容包括第一端及第二端，所述第一电容的第一端连接所述驱动开关的控制端，所述第一电容的第二端连接所述第二可控开关的第一端；及
    第二电容，所述第二电容包括第一端及第二端，所述第二电容的第一端连接所述第二可控开关的第一端及所述第一电容的第二端，所述第二电容的第二端连接一第二电压端。
  4. 根据权利要求3所述的扫描驱动电路，其中，所述驱动开关、所述第一可控开关及所述第二可控开关均为NMOS型薄膜晶体管或均为PMOS型薄膜晶体管或为NMOS型薄膜晶体管与PMOS型薄膜晶体管的组合，所述驱动开关、所述第一可控开关及所述第二可控开关的控制端、第一端及第二端分别对应所述薄膜晶体管的栅极、漏极及源极。
  5. 一种平面显示装置，其中，所述平面显示装置包括像素补偿电路，所述像素补偿电路包括：
    第一可控开关，所述第一可控开关包括控制端、第一端及第二端，所述第一可控开关的控制端连接一第一扫描线，所述第一可控开关的第一端连接一数据线以从所述数据线接收数据电压；
    驱动开关，所述驱动开关包括控制端、第一端及第二端，所述驱动开关的控制端连接所述第一可控开关的第二端，所述驱动开关的第一端连接一第一电压端；
    第二可控开关，所述第二可控开关包括控制端、第一端及第二端，所述第二可控开关的控制端连接一第二扫描线，所述第二可控开关的第一端连接所述驱动开关的第二端；
    有机发光二极管，所述有机发光二极管包括阳极及阴极，所述有机发光二极管的阳极连接所述第二可控开关的第二端，所述有机发光二极管的阴极接地；
    第一电容，所述第一电容包括第一端及第二端，所述第一电容的第一端连接所述驱动开关的控制端，所述第一电容的第二端连接所述第二可控开关的第一端；及
    第二电容，所述第二电容包括第一端及第二端，所述第二电容的第一端连接所述第二可控开关的第一端及所述第一电容的第二端，所述第二电容的第二端连接一第二电压端。
  6. 根据权利要求5所述的平面显示装置，其中，所述驱动开关、所述第一可控开关及所述第二可控开关均为NMOS型薄膜晶体管或均为PMOS型薄膜晶体管或为NMOS型薄膜晶体管与PMOS型薄膜晶体管的组合，所述驱动开关、所述第一可控开关及所述第二可控开关的控制端、第一端及第二端分别对应所述薄膜晶体管的栅极、漏极及源极。
  7. 根据权利要求5所述的平面显示装置，其中，所述平面显示装置为OLED或LCD。
PCT/CN2016/074529 2016-01-29 2016-02-25 像素补偿电路、扫描驱动电路及平面显示装置 WO2017128465A1 (zh)

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