WO2017024604A1 - 一种有机发光二极管显示器 - Google Patents

一种有机发光二极管显示器 Download PDF

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Publication number
WO2017024604A1
WO2017024604A1 PCT/CN2015/087375 CN2015087375W WO2017024604A1 WO 2017024604 A1 WO2017024604 A1 WO 2017024604A1 CN 2015087375 W CN2015087375 W CN 2015087375W WO 2017024604 A1 WO2017024604 A1 WO 2017024604A1
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Prior art keywords
voltage
input
output
light emitting
switching transistor
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PCT/CN2015/087375
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English (en)
French (fr)
Inventor
李�浩
Original Assignee
深圳市华星光电技术有限公司
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Priority to US14/784,584 priority Critical patent/US9892687B2/en
Publication of WO2017024604A1 publication Critical patent/WO2017024604A1/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
    • G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G2300/0861—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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • 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
    • G09G2310/0289—Details of voltage level shifters arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/025—Reduction of instantaneous peaks of current
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD

Definitions

  • the present invention relates to the field of display technologies, and in particular, to an organic light emitting diode display.
  • OLED Organic Light-Emitting Display
  • OLED Organic Light-Emitting Diode
  • the organic light emitting diode display includes a plurality of organic light emitting diodes.
  • the organic light emitting diodes are driven by a driving circuit, and the organic light emitting diodes emit light by inputting a voltage (for example, OVDD) to the driving circuit.
  • a voltage for example, OVDD
  • the actual voltage on the LED is fluctuated, resulting in poor uniformity of the display screen and reducing the display effect.
  • an organic light emitting diode display which includes:
  • the first substrate includes:
  • the organic light emitting unit comprising an organic light emitting diode
  • the pixel driving unit has a power input end and a light emitting control end; the pixel driving unit is connected to the organic light emitting diode;
  • the pixel driving unit is configured to control a display state of the organic light emitting diode according to the data signal and the scan signal and a voltage input by the power input end;
  • the light emitting control end is configured to input an emission control signal,
  • the illumination control signal is used to control whether the organic light emitting diode emits light;
  • a power module configured to input an initial voltage to a power input end of the pixel driving unit; the power module has a first output; the first output is configured to input an initial voltage to the power input;
  • An adjusting unit configured to adjust an initial voltage output by the power module according to an actual voltage on a power input end of the pixel driving unit, so that an actual voltage on the power input end is equal to a preset voltage
  • the adjusting unit has a first input end, a second input end, and a second output end; the first input end is used to input an initial voltage of the power module, and the second input end is used to input the power source An actual voltage at the input; the second output is configured to input a feedback voltage to the first output;
  • the first output end is connected to the first input end
  • the second input end is connected to the power input end
  • the second output end is also connected to the first output end
  • the adjusting unit is configured to reduce a voltage of the first output terminal when an actual voltage of the power input terminal becomes large.
  • the adjusting unit is further configured to increase a voltage of the first output terminal when an actual voltage of the power input terminal becomes small.
  • the adjusting unit includes: a blocking unit, configured to perform a DC blocking process on the actual voltage input to the power input terminal of the second input terminal to generate an AC adjusting voltage;
  • a feedback subunit configured to perform feedback adjustment on an initial voltage of the power module according to the AC adjustment voltage to generate the feedback voltage.
  • the feedback subunit when the AC feedback voltage is greater than the preset voltage, acquires a negative feedback voltage according to the AC regulation voltage and an initial voltage of the power module, The voltage at the first output is reduced.
  • the feedback subunit acquires a positive feedback voltage according to the AC regulation voltage and an initial voltage of the power module, The voltage at the first output is increased.
  • the feedback voltage is a difference between an initial voltage of the power supply module and the alternating current regulated voltage.
  • the adjustment unit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a differential amplifier, and a first capacitor;
  • the differential amplifier has an original input, and feedback Input terminal, differential output terminal;
  • the first input terminal is connected to the original input terminal through the first resistor
  • the second input end is connected to one end of the first capacitor, the other end of the first capacitor is connected to one end of the third resistor, and the other end of the third resistor is connected to the feedback input end;
  • the second output terminal is connected to the differential output terminal; a fourth resistor is further connected between the feedback input terminal and the differential output terminal; and the original input terminal is also grounded through the second resistor.
  • the pixel driving unit includes:
  • a control end of the first switching transistor is connected to the scan line, and an input end of the first switching transistor is connected to the data line,
  • a control end of the third switching transistor is connected to the light emitting control end, an input end of the third switching transistor is connected to the power input end, and an output end of the third switching transistor is connected to an input of the second switching transistor end;
  • a control end of the second switching transistor is connected to an output end of the first switching transistor, an output end of the second switching transistor is connected to an anode of the organic light emitting diode, and a cathode of the organic light emitting diode is connected to a DC low level power supply;
  • An output of the first switching transistor is further coupled to an input of the second switching transistor through the second capacitor.
  • an organic light emitting diode display which includes:
  • the first substrate includes:
  • the organic light emitting unit comprising an organic light emitting diode
  • each of the organic light emitting units correspondingly disposed with a pixel driving unit; wherein the pixel driving unit has a power input end; the pixel driving unit is connected to the organic light emitting diode; the pixel driving unit Controlling a display state of the organic light emitting diode according to the data signal and the scan signal and a voltage input by the power input terminal;
  • a power module for inputting an initial voltage to a power input terminal of the pixel driving unit
  • an adjusting unit configured to adjust an initial voltage output by the power module according to an actual voltage on the power input end of the pixel driving unit, so that an actual voltage on the power input end is equal to a preset voltage.
  • the power module has a first output; the first output is configured to input an initial voltage to the power input;
  • the adjusting unit has a first input end, a second input end, and a second output end; the first input end is used to input an initial voltage of the power module, and the second input end is used to input the power source An actual voltage at the input; the second output is configured to input a feedback voltage to the first output;
  • the first output end is connected to the first input end
  • the second input end is connected to the power input end
  • the second output end is also connected to the first output end
  • the adjusting unit is configured to reduce a voltage of the first output terminal when an actual voltage of the power input terminal becomes large.
  • the adjusting unit is further configured to increase a voltage of the first output terminal when an actual voltage of the power input terminal becomes small.
  • the adjustment unit includes:
  • a blocking unit configured to perform a DC blocking process on the actual voltage input by the second input terminal to generate an AC regulating voltage
  • a feedback subunit configured to perform feedback adjustment on an initial voltage of the power module according to the AC adjustment voltage to generate the feedback voltage.
  • the feedback subunit when the AC feedback voltage is greater than the preset voltage, acquires a negative feedback voltage according to the AC regulation voltage and an initial voltage of the power module, The voltage at the first output is reduced.
  • the feedback subunit acquires a positive feedback voltage according to the AC regulation voltage and an initial voltage of the power module, The voltage at the first output is increased.
  • the feedback voltage is a difference between an initial voltage of the power supply module and the alternating current regulated voltage.
  • the adjustment unit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a differential amplifier, and a first capacitor;
  • the differential amplifier has an original input, and feedback Input terminal, differential output terminal;
  • the first input terminal is connected to the original input terminal through the first resistor
  • the second input end is connected to one end of the first capacitor, the other end of the first capacitor is connected to one end of the third resistor, and the other end of the third resistor is connected to the feedback input end;
  • the second output terminal is connected to the differential output terminal; a fourth resistor is further connected between the feedback input terminal and the differential output terminal; and the original input terminal is also grounded through the second resistor.
  • the pixel driving unit further has a light emitting control end, wherein the light emitting control end is configured to input an emission control signal, and the illumination control signal is used to control whether the organic light emitting diode emits light;
  • the pixel driving unit includes:
  • a control end of the first switching transistor is connected to the scan line, and an input end of the first switching transistor is connected to the data line,
  • a control end of the third switching transistor is connected to the light emitting control end, an input end of the third switching transistor is connected to the power input end, and an output end of the third switching transistor is connected to an input of the second switching transistor end;
  • a control end of the second switching transistor is connected to an output end of the first switching transistor, an output end of the second switching transistor is connected to an anode of the organic light emitting diode, and a cathode of the organic light emitting diode is connected to a DC low level power supply;
  • An output of the first switching transistor is further coupled to an input of the second switching transistor through the second capacitor.
  • the OLED display of the present invention increases the uniformity of the display screen by adding a voltage adjusting unit to the existing driving circuit, and real-time adjusting the voltage input to the organic light emitting diode to prevent fluctuations thereof. And display effects.
  • FIG. 1 is a schematic structural view of a pixel driving unit of the present invention
  • FIG. 2 is a schematic view showing fluctuations of driving voltages of a related art organic light emitting diode
  • FIG. 3 is a circuit diagram of an adjustment unit in a drive circuit of the present invention.
  • FIG. 4 is a circuit diagram of voltage regulation of the regulating unit of the present invention.
  • FIG. 1 is a schematic structural diagram of a pixel driving unit according to the present invention.
  • the OLED display of the present invention includes: a first substrate and a second substrate, a driving circuit, the second substrate is disposed opposite to the first substrate; as shown in FIG. 1, the first substrate includes: a plurality of a data line 12, a plurality of scan lines 11, a plurality of organic light emitting units, a plurality of pixel driving units 13, the data lines 12 for inputting data signals, the scan lines 11 for inputting scan signals, and the organic light emitting unit Formed by the data line 12 and the scan line 11; the organic light emitting unit comprises an organic light emitting diode L1;
  • Each of the organic light emitting units is correspondingly disposed with the pixel driving unit 13; wherein the pixel driving unit 13 has a power input terminal 14; the pixel driving unit 13 is connected to the organic light emitting diode L1; the pixel driving The unit 13 is configured to control a display state of the organic light emitting diode L1 according to the data signal and the scan signal and a voltage input by the power input terminal (such as OVDD);
  • the driving circuit includes: a power module and an adjustment unit;
  • the power module is configured to input an initial voltage to the power input terminal 14 of the pixel driving unit 13; and an adjusting unit that adjusts an initial voltage output by the power module according to an actual voltage on the power input end of the pixel driving unit So that the actual voltage on the power input 14 is equal to the preset voltage.
  • the pixel driving unit 13 further has an emission control terminal 15, and the illumination control terminal 15 is input with an illumination control signal, wherein the illumination control signal is used to control whether the organic light emitting diode emits light; when the illumination control signal is high In the flat state, the organic light emitting diode emits light, and when the light emission control signal is at a low level, the organic light emitting diode does not emit light.
  • the waveform diagram of the illumination control signal is shown as 21 in FIG. 2, and the actual voltage of the power input terminal is as shown by 22 in FIG. 2, when the illumination control signal is converted from a high level to a low level.
  • the actual voltage 22 at the power input terminal has positive and negative spikes due to a sudden change in the load resistance. This pulse affects the driving current of the organic light emitting diode, further affecting the uniformity of the picture display.
  • the pixel driving unit 13 includes: a first switching transistor T1, a second switching transistor T2, a third switching transistor T3, and a second capacitor Cst;
  • the control end of the first switching transistor T1 is connected to the scan line 11, the input end of the first switching transistor T1 is connected to the data line 12; the control end of the third switching transistor T3 is connected to the illumination control end.
  • the input end of the third switching transistor T3 is connected to the input end of the second switching transistor T2, and the output end of the third switching transistor T3 is connected to the input end of the second switching transistor T2;
  • the control end of the second switching transistor T2 is connected to the output end of the first switching transistor T1, the output end of the second switching transistor T2 is connected to the anode of the organic light emitting diode L1, and the cathode of the organic light emitting diode L1 Connected to a DC low-level power supply (such as OVSS); the output of the first switching transistor T1 is also connected to the input end of the second switching transistor T2 through the second capacitor Cst.
  • a DC low-level power supply such as OVSS
  • the power module has a first output; the first output is for inputting an initial voltage to the power input; the adjusting unit has a first input 23, a second input 24, and a a second output 25 for inputting an initial voltage of the power module, the second input 24 for inputting an actual voltage of the power input 14; the second output 25 And a method for inputting a feedback voltage to the first output end;
  • the first output terminal is connected to the first input terminal 23, the second input terminal 24 is connected to the power input terminal 14, and the second output terminal 25 is also connected to the first output terminal.
  • the adjusting unit is configured to reduce a voltage of the first output terminal when an actual voltage of the power input terminal 14 becomes large; and further, when the actual voltage at the power input end becomes smaller, increase the The voltage at the first output.
  • the adjusting unit comprises: a blocking subunit and a feedback subunit;
  • the blocking unit is configured to perform a DC blocking process on the actual voltage input to the power input end of the second input terminal 24 to generate an AC regulated voltage; that is, filter the DC power, leaving only the AC power input to the a feedback subunit, preferably the DC blocking subunit is a capacitor; the feedback subunit is configured to perform feedback adjustment on an initial voltage of the power module according to the AC adjustment voltage to generate the feedback voltage.
  • the feedback subunit can be a differential amplifier.
  • the actual voltage of the power input terminal 14 can be detected by the detecting module.
  • the actual voltage 31 on the power input terminal 14 includes a DC portion and an AC portion, for example, a DC voltage of 10 V, which is input.
  • the adjusting sub-unit processes the voltage of the alternating current portion and the initial power supply of the power module to obtain a compensation signal 33 (ie, a feedback voltage), and then outputs a compensation signal to the first output end, so that The actual voltage at the output of the power supply remains at a constant value.
  • a compensation signal 33 ie, a feedback voltage
  • the adjustment unit includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a differential amplifier 26, and a first capacitor C1;
  • the differential amplifier has Original input terminal 27, feedback input terminal 28, differential output terminal;
  • the first input terminal 23 is connected to the original input terminal 27 through the first resistor R1;
  • the second input end 24 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is connected to one end of the third resistor R3, and the other end of the third resistor R3 is The feedback input terminal 28 is connected;
  • the second output terminal 25 is connected to the differential output terminal; a fourth resistor R4 is further connected between the feedback input terminal 28 and the differential output terminal; the original input terminal 27 also passes through the second resistor R2 Ground.
  • the resistance ratio of the first resistor R1 and the second resistor R2 is 1.
  • the feedback subunit acquires a negative feedback voltage according to the AC regulation voltage and an initial voltage of the power module, so that the first output end The voltage is reduced.
  • the preset voltage is 10v
  • the differential output of the differential amplifier is -2v
  • a feedback voltage of -2v is input to the first output of the power module, so that The actual voltage at the input of the power supply is equal to 10v.
  • the feedback subunit acquires a positive feedback voltage according to the AC regulation voltage and an initial voltage of the power module to increase the voltage of the first output terminal .
  • the preset voltage is 10v
  • the differential output of the differential amplifier is 2v
  • the feedback voltage of 2v is input to the first output end of the power module, so that the actual input of the power supply is The voltage is equal to 10v.
  • the feedback voltage is a difference between an initial voltage of the power module and the AC regulated voltage.
  • the OLED display of the present invention increases the uniformity of the display screen by adding a voltage adjusting unit to the existing driving circuit, and real-time adjusting the voltage input to the organic light emitting diode to prevent fluctuations thereof. And display effects.

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

Abstract

一种有机发光二极管显示器，所述有机发光二极管显示器包括：驱动电路，其包括：电源模块，用于向像素驱动单元（13）的电源输入端（14）输入初始电压；以及调节单元，用于根据所述像素驱动单元（13）的电源输入端（14）上的实际电压，对所述电源模块输出的初始电压进行调节，以使所述电源输入端（14）上的实际电压等于预设电压。

Description

一种有机发光二极管显示器 技术领域
本发明涉及显示器技术领域，特别是涉及一种有机发光二极管显示器。
 背景技术
有机发光二极管显示器（Organic Light-Emitting Diode，OLED），具有自发光的特性，其可视角度大、且能够节省电能，因此被广泛使用在手机和电视中。
有机发光二极管显示器包括多个有机发光二极管，有机发光二极管通过驱动电路进行驱动，通过向驱动电路输入电压（譬如OVDD），有机发光二极管就会发光。但是由于受到电路中驱动负载的影响，导致发光二极管上的实际电压出现波动，导致显示画面的均匀性较差，降低显示效果。
因此，有必要提供一种有机发光二极管显示器，以解决现有技术所存在的问题。
 技术问题
本发明的目的在于提供一种有机发光二极管显示器，以解决现有技术的有机发光二极管上的驱动电压，容易受负载影响产生波动，降低显示画面的均匀性的技术问题。
 技术解决方案
为解决上述技术问题，本发明构造了一种有机发光二极管显示器，其包括：
第一基板，包括：
多条数据线，用于输入数据信号；
多条扫描线，用于输入扫描信号；
多个有机发光单元，由所述数据线和所述扫描线限定形成；所述有机发光单元包括有机发光二极管；
多个像素驱动单元，每个所述有机发光单元对应设置一像素驱动单元；其中所述像素驱动单元具有一电源输入端、发光控制端；所述像素驱动单元与所述有机发光二极管连接；所述像素驱动单元用于根据所述数据信号和所述扫描信号以及所述电源输入端输入的电压控制所述有机发光二极管的显示状态；所述发光控制端用于输入有发光控制信号，所述发光控制信号用于控制所述有机发光二极管是否发光；
第二基板，与所述第一基板相对设置；以及
驱动电路，包括：
电源模块，用于向所述像素驱动单元的电源输入端输入初始电压；所述电源模块具有第一输出端；所述第一输出端用于向所述电源输入端输入初始电压；以及
调节单元，用于根据所述像素驱动单元的电源输入端上的实际电压，对所述电源模块输出的初始电压进行调节，以使所述电源输入端上的实际电压等于预设电压；
所述调节单元具有第一输入端，第二输入端，以及第二输出端；所述第一输入端用于输入所述电源模块的初始电压，所述第二输入端用于输入所述电源输入端的实际电压；所述第二输出端用于向所述第一输出端输入反馈电压；
所述第一输出端连接所述第一输入端，所述第二输入端连接所述电源输入端，所述第二输出端也连接所述第一输出端。
在本发明的有机发光二极管显示器中，所述调节单元用于在所述电源输入端的实际电压变大时，降低所述第一输出端的电压。
在本发明的有机发光二极管显示器中，所述调节单元还用于在所述电源输入端的实际电压变小时，增大所述第一输出端的电压。
在本发明的有机发光二极管显示器中，所述调节单元包括：隔直子单元，用于对所述第二输入端输入的所述电源输入端的实际电压进行隔直处理，以产生交流调节电压；
反馈子单元，用于根据所述交流调节电压对所述电源模块的初始电压进行反馈调节，以产生所述反馈电压。
在本发明的有机发光二极管显示器中，当所述交流反馈电压大于所述预设电压时，所述反馈子单元根据所述交流调节电压和所述电源模块的初始电压获取负的反馈电压，以使所述第一输出端的电压减小。
在本发明的有机发光二极管显示器中，当所述交流反馈电压小于所述预设电压时，所述反馈子单元根据所述交流调节电压和所述电源模块的初始电压获取正的反馈电压，以使所述第一输出端的电压增大。
在本发明的有机发光二极管显示器中，所述反馈电压为所述电源模块的初始电压与所述交流调节电压之间的差值。
在本发明的有机发光二极管显示器中，所述调节单元包括：第一电阻、第二电阻、第三电阻、第四电阻、差分放大器、以及第一电容；所述差分放大器具有原始输入端、反馈输入端、差分输出端；
所述第一输入端通过所述第一电阻连接至所述原始输入端；
所述第二输入端与所述第一电容的一端连接，所述第一电容的另一端与所述第三电阻的一端连接，所述第三电阻的另一端与所述反馈输入端连接；
所述第二输出端连接所述差分输出端；所述反馈输入端和所述差分输出端之间还连接有第四电阻；所述原始输入端还通过所述第二电阻接地。
在本发明的有机发光二极管显示器中，所述像素驱动单元包括：
第一开关晶体管，第二开关晶体管、第三开关晶体管、第二电容；
所述第一开关晶体管的控制端连接所述扫描线，所述第一开关晶体管的输入端连接所述数据线，
所述第三开关晶体管的控制端连接所述发光控制端，所述第三开关晶体管的输入端连接所述电源输入端，所述第三开关晶体管的输出端连接所述第二开关晶体管的输入端；
所述第二开关晶体管的控制端连接所述第一开关晶体管的输出端，所述第二开关晶体管的输出端连接所述有机发光二极管的阳极，所述有机发光二极管的阴极接直流低电平电源；
所述第一开关晶体管的输出端还通过所述第二电容连接至所述第二开关晶体管的输入端。
为解决上述技术问题，本发明构造了一种有机发光二极管显示器，其包括：
第一基板，包括：
多条数据线，用于输入数据信号；
多条扫描线，用于输入扫描信号；
多个有机发光单元，由所述数据线和所述扫描线限定形成；所述有机发光单元包括有机发光二极管；以及
多个像素驱动单元，每个所述有机发光单元对应设置一像素驱动单元；其中所述像素驱动单元具有一电源输入端；所述像素驱动单元与所述有机发光二极管连接；所述像素驱动单元用于根据所述数据信号和所述扫描信号以及所述电源输入端输入的电压控制所述有机发光二极管的显示状态；
第二基板，与所述第一基板相对设置；
驱动电路，包括：
电源模块，用于向所述像素驱动单元的电源输入端输入初始电压；以及
调节单元，用于根据所述像素驱动单元的电源输入端上的实际电压，对所述电源模块输出的初始电压进行调节，以使所述电源输入端上的实际电压等于预设电压。
在本发明的有机发光二极管显示器中，所述电源模块具有第一输出端；所述第一输出端用于向所述电源输入端输入初始电压；
所述调节单元具有第一输入端，第二输入端，以及第二输出端；所述第一输入端用于输入所述电源模块的初始电压，所述第二输入端用于输入所述电源输入端的实际电压；所述第二输出端用于向所述第一输出端输入反馈电压；
所述第一输出端连接所述第一输入端，所述第二输入端连接所述电源输入端，所述第二输出端也连接所述第一输出端。
在本发明的有机发光二极管显示器中，所述调节单元用于在所述电源输入端的实际电压变大时，降低所述第一输出端的电压。
在本发明的有机发光二极管显示器中，所述调节单元还用于在所述电源输入端的实际电压变小时，增大所述第一输出端的电压。
在本发明的有机发光二极管显示器中，所述调节单元包括：
隔直子单元，用于对所述第二输入端输入的所述电源输入端的实际电压进行隔直处理，以产生交流调节电压；
反馈子单元，用于根据所述交流调节电压对所述电源模块的初始电压进行反馈调节，以产生所述反馈电压。
在本发明的有机发光二极管显示器中，当所述交流反馈电压大于所述预设电压时，所述反馈子单元根据所述交流调节电压和所述电源模块的初始电压获取负的反馈电压，以使所述第一输出端的电压减小。
在本发明的有机发光二极管显示器中，当所述交流反馈电压小于所述预设电压时，所述反馈子单元根据所述交流调节电压和所述电源模块的初始电压获取正的反馈电压，以使所述第一输出端的电压增大。
在本发明的有机发光二极管显示器中，所述反馈电压为所述电源模块的初始电压与所述交流调节电压之间的差值。
在本发明的有机发光二极管显示器中，所述调节单元包括：第一电阻、第二电阻、第三电阻、第四电阻、差分放大器、以及第一电容；所述差分放大器具有原始输入端、反馈输入端、差分输出端；
所述第一输入端通过所述第一电阻连接至所述原始输入端；
所述第二输入端与所述第一电容的一端连接，所述第一电容的另一端与所述第三电阻的一端连接，所述第三电阻的另一端与所述反馈输入端连接；
所述第二输出端连接所述差分输出端；所述反馈输入端和所述差分输出端之间还连接有第四电阻；所述原始输入端还通过所述第二电阻接地。
在本发明的有机发光二极管显示器中，所述像素驱动单元还具有发光控制端，所述发光控制端用于输入有发光控制信号，所述发光控制信号用于控制所述有机发光二极管是否发光；
所述像素驱动单元包括：
第一开关晶体管，第二开关晶体管、第三开关晶体管、第二电容；
所述第一开关晶体管的控制端连接所述扫描线，所述第一开关晶体管的输入端连接所述数据线，
所述第三开关晶体管的控制端连接所述发光控制端，所述第三开关晶体管的输入端连接所述电源输入端，所述第三开关晶体管的输出端连接所述第二开关晶体管的输入端；
所述第二开关晶体管的控制端连接所述第一开关晶体管的输出端，所述第二开关晶体管的输出端连接所述有机发光二极管的阳极，所述有机发光二极管的阴极接直流低电平电源；
所述第一开关晶体管的输出端还通过所述第二电容连接至所述第二开关晶体管的输入端。
 有益效果
本发明的有机发光二极管显示器，通过在现有的驱动电路的基础上增加一个电压调节单元，通过对输入到有机发光二极管上的电压进行实时调节，防止其发生波动，从而提高显示画面的均匀性和显示效果。
 附图说明
图1为本发明的像素驱动单元的结构示意图；
图2为现有技术的有机发光二极管的驱动电压的波动的示意图；
图3为本发明的驱动电路中的调节单元的电路图；
图4为本发明调节单元的电压调节的电路图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是以相同标号表示。
请参照图1，图1为本发明的像素驱动单元的结构示意图；
本发明的有机发光二极管显示器，包括：第一基板和第二基板、驱动电路，所述第二基板与所述第一基板相对设置；如图1所示，所述第一基板包括：多条数据线12、多个扫描线11、多个有机发光单元、多个像素驱动单元13，所述数据线12用于输入数据信号；所述扫描线11用于输入扫描信号；所述有机发光单元由所述数据线12和所述扫描线11限定形成的；所述有机发光单元包括有机发光二极管L1；
每个所述有机发光单元对应设置一所述像素驱动单元13；其中所述像素驱动单元13具有一电源输入端14；所述像素驱动单元13与所述有机发光二极管L1连接；所述像素驱动单元13用于根据所述数据信号和所述扫描信号以及所述电源输入端输入的电压（譬如OVDD）控制所述有机发光二极管L1的显示状态；
所述驱动电路包括：电源模块、调节单元；
电源模块用于向所述像素驱动单元13的电源输入端14输入初始电压；以及调节单元，根据所述像素驱动单元的电源输入端上的实际电压，对所述电源模块输出的初始电压进行调节，以使所述电源输入端14上的实际电压等于预设电压。
所述像素驱动单元13还具有发光控制端15，所述发光控制端15输入有发光控制信号，所述发光控制信号用来控制所述有机发光二极管是否发光；当所述发光控制信号为高电平的时候，所述有机发光二极管发光，当所述发光控制信号为低电平的时候，所述有机发光二极管不发光。
如图2所示，所述发光控制信号的波形图如图2中21所示，所述电源输入端的实际电压如图2中22所示，当所述发光控制信号由高电平转换为低电平，或者由低电平转换为高电平时，由于负载阻值发生突变，所述电源输入端的实际电压22出现正向和负向的尖脉冲。该脉冲会对有机发光二极管的驱动电流产生影响，进一步影响到画面显示的均匀性。
所述像素驱动单元13包括：第一开关晶体管T1，第二开关晶体管T2、第三开关晶体管T3、第二电容Cst；
所述第一开关晶体管T1的控制端连接所述扫描线11，所述第一开关晶体管T1的输入端连接所述数据线12；所述第三开关晶体管T3的控制端连接所述发光控制端15，所述第三开关晶体管T3的输入端连接所述电源输入端14，所述第三开关晶体管T3的输出端连接所述第二开关晶体管T2的输入端；
所述第二开关晶体管T2的控制端连接所述第一开关晶体管T1的输出端，所述第二开关晶体管T2的输出端连接所述有机发光二极管L1的阳极，所述有机发光二极管L1的阴极接直流低电平电源（譬如OVSS）；所述第一开关晶体管T1的输出端还通过所述第二电容Cst连接至所述第二开关晶体管T2的输入端。
优选地，所述电源模块具有第一输出端；所述第一输出端用于向所述电源输入端输入初始电压；所述调节单元具有第一输入端23，第二输入端24，以及第二输出端25；所述第一输入端25用于输入所述电源模块的初始电压，所述第二输入端24用于输入所述电源输入端14的实际电压；所述第二输出端25用于向所述第一输出端输入反馈电压；
所述第一输出端连接所述第一输入端23，所述第二输入端24连接所述电源输入端14，所述第二输出端25也连接所述第一输出端。
优选地，所述调节单元用于在所述电源输入端14的实际电压变大时，降低所述第一输出端的电压；还用于在所述电源输入端的实际电压变小时，增大所述第一输出端的电压。
优选地，所述调节单元包括：隔直子单元和反馈子单元；
所述隔直子单元，用于对所述第二输入端24输入的所述电源输入端的实际电压进行隔直处理，以产生交流调节电压；即滤除掉直流电，只剩下交流电输入到所述反馈子单元，优选地所述隔直子单元为电容；所述反馈子单元，用于根据所述交流调节电压对所述电源模块的初始电压进行反馈调节，以产生所述反馈电压。所述反馈子单元可为差分放大器。
譬如可通过检测模块检测所述电源输入端14的实际电压，如图4所示，所述电源输入端14上的实际电压31包括直流部分和交流部分，譬如其直流电压为10v，将其输入到所述第二输入端24，经过所述隔直子单元处理后的到高频脉冲信号32（只剩下交流部分，其基准电压为0v），此时再将交流部分32输入到所述调节子单元，所述调节子单元将所述交流部分的电压和所述电源模块的初始电源处理后得到补偿信号33（即反馈电压），再将补偿信号输出到所述第一输出端，以使所述电源输出端的实际电压保持恒定值。
优选地，如图3所示，所述调节单元包括：第一电阻R1、第二电阻R2、第三电阻R3、第四电阻R4、差分放大器26、以及第一电容C1；所述差分放大器具有原始输入端27、反馈输入端28、差分输出端；
所述第一输入端23通过所述第一电阻R1连接至所述原始输入端27；
所述第二输入端24与所述第一电容C1的一端连接，所述第一电容C1的另一端与所述第三电阻R3的一端连接，所述第三电阻R3的另一端与所述反馈输入端28连接；
所述第二输出端25连接所述差分输出端；所述反馈输入端28和所述差分输出端之间还连接有第四电阻R4；所述原始输入端27还通过所述第二电阻R2接地。优选地，所述第一电阻R1和所述第二电阻R2的阻值比值为1。
优选地，当所述交流反馈电压大于所述预设电压时，所述反馈子单元根据所述交流调节电压和所述电源模块的初始电压获取负的反馈电压，以使所述第一输出端的电压减小。
譬如预设电压为10v，当所述交流反馈电压为12v时，所述差分放大器的差分输出端为-2v，将-2v的反馈电压输入到所述电源模块的第一输出端，使得所述电源输入端的实际电压等于10v。
当所述交流反馈电压小于所述预设电压时，所述反馈子单元根据所述交流调节电压和所述电源模块的初始电压获取正的反馈电压，以使所述第一输出端的电压增大。
譬如预设电压为10v，当所述交流反馈电压为8v时，所述差分放大器的差分输出端为2v，将2v的反馈电压输入到电源模块的第一输出端，使得所述电源输入端的实际电压等于10v。
优选地，所述反馈电压为所述电源模块的初始电压与所述交流调节电压之间的差值。
本发明的有机发光二极管显示器，通过在现有的驱动电路的基础上增加一个电压调节单元，通过对输入到有机发光二极管上的电压进行实时调节，防止其发生波动，从而提高显示画面的均匀性和显示效果。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (19)

  1. 一种有机发光二极管显示器，其包括：
    第一基板，包括：
    多条数据线，用于输入数据信号；
    多条扫描线，用于输入扫描信号；
    多个有机发光单元，由所述数据线和所述扫描线限定形成；所述有机发光单元包括有机发光二极管；以及
    多个像素驱动单元，每个所述有机发光单元对应设置一像素驱动单元；其中所述像素驱动单元具有一电源输入端、发光控制端；所述像素驱动单元与所述有机发光二极管连接；所述像素驱动单元用于根据所述数据信号和所述扫描信号以及所述电源输入端输入的电压控制所述有机发光二极管的显示状态；所述发光控制端用于输入有发光控制信号，所述发光控制信号用于控制所述有机发光二极管是否发光；
    第二基板，与所述第一基板相对设置；以及
    驱动电路，包括：
    电源模块，用于向所述像素驱动单元的电源输入端输入初始电压；所述电源模块具有第一输出端；所述第一输出端用于向所述电源输入端输入初始电压；以及
    调节单元，用于根据所述像素驱动单元的电源输入端上的实际电压，对所述电源模块输出的初始电压进行调节，以使所述电源输入端上的实际电压等于预设电压；
    所述调节单元具有第一输入端，第二输入端，以及第二输出端；所述第一输入端用于输入所述电源模块的初始电压，所述第二输入端用于输入所述电源输入端的实际电压；所述第二输出端用于向所述第一输出端输入反馈电压；
    所述第一输出端连接所述第一输入端，所述第二输入端连接所述电源输入端，所述第二输出端也连接所述第一输出端。
  2. 根据权利要求1所述的有机发光二极管显示器，其中
    所述调节单元用于在所述电源输入端的实际电压变大时，降低所述第一输出端的电压。
  3. 根据权利要求2所述的有机发光二极管显示器，其中所述调节单元还用于在所述电源输入端的实际电压变小时，增大所述第一输出端的电压。
  4. 根据权利要求1所述的有机发光二极管显示器，其中
    所述调节单元包括：隔直子单元，用于对所述第二输入端输入的所述电源输入端的实际电压进行隔直处理，以产生交流调节电压；
    反馈子单元，用于根据所述交流调节电压对所述电源模块的初始电压进行反馈调节，以产生所述反馈电压。
  5. 根据权利要求4所述的有机发光二极管显示器，其中
    当所述交流反馈电压大于所述预设电压时，所述反馈子单元根据所述交流调节电压和所述电源模块的初始电压获取负的反馈电压，以使所述第一输出端的电压减小。
  6. 根据权利要求4所述的有机发光二极管显示器，其中
    当所述交流反馈电压小于所述预设电压时，所述反馈子单元根据所述交流调节电压和所述电源模块的初始电压获取正的反馈电压，以使所述第一输出端的电压增大。
  7. 根据权利要求4所述的有机发光二极管显示器，其中
    所述反馈电压为所述电源模块的初始电压与所述交流调节电压之间的差值。
  8. 根据权利要求1所述的有机发光二极管显示器，其中
    所述调节单元包括：第一电阻、第二电阻、第三电阻、第四电阻、差分放大器、以及第一电容；所述差分放大器具有原始输入端、反馈输入端、差分输出端；
    所述第一输入端通过所述第一电阻连接至所述原始输入端；
    所述第二输入端与所述第一电容的一端连接，所述第一电容的另一端与所述第三电阻的一端连接，所述第三电阻的另一端与所述反馈输入端连接；
    所述第二输出端连接所述差分输出端；所述反馈输入端和所述差分输出端之间还连接有第四电阻；所述原始输入端还通过所述第二电阻接地。
  9. 根据权利要求1所述的有机发光二极管显示器，其中所述像素驱动单元包括：
    第一开关晶体管，第二开关晶体管、第三开关晶体管、第二电容；
    所述第一开关晶体管的控制端连接所述扫描线，所述第一开关晶体管的输入端连接所述数据线，
    所述第三开关晶体管的控制端连接所述发光控制端，所述第三开关晶体管的输入端连接所述电源输入端，所述第三开关晶体管的输出端连接所述第二开关晶体管的输入端；
    所述第二开关晶体管的控制端连接所述第一开关晶体管的输出端，所述第二开关晶体管的输出端连接所述有机发光二极管的阳极，所述有机发光二极管的阴极接直流低电平电源；
    所述第一开关晶体管的输出端还通过所述第二电容连接至所述第二开关晶体管的输入端。
  10. 一种有机发光二极管显示器，其包括：
    第一基板，包括：
    多条数据线，用于输入数据信号；
    多条扫描线，用于输入扫描信号；
    多个有机发光单元，由所述数据线和所述扫描线限定形成；所述有机发光单元包括有机发光二极管；以及
    多个像素驱动单元，每个所述有机发光单元对应设置一像素驱动单元；其中所述像素驱动单元具有一电源输入端；所述像素驱动单元与所述有机发光二极管连接；所述像素驱动单元用于根据所述数据信号和所述扫描信号以及所述电源输入端输入的电压控制所述有机发光二极管的显示状态；
    第二基板，与所述第一基板相对设置；以及
    驱动电路，包括：
    电源模块，用于向所述像素驱动单元的电源输入端输入初始电压；以及
    调节单元，用于根据所述像素驱动单元的电源输入端上的实际电压，对所述电源模块输出的初始电压进行调节，以使所述电源输入端上的实际电压等于预设电压。
  11. 根据权利要求10所述的有机发光二极管显示器，其中
    所述电源模块具有第一输出端；所述第一输出端用于向所述电源输入端输入初始电压；
    所述调节单元具有第一输入端，第二输入端，以及第二输出端；所述第一输入端用于输入所述电源模块的初始电压，所述第二输入端用于输入所述电源输入端的实际电压；所述第二输出端用于向所述第一输出端输入反馈电压；
    所述第一输出端连接所述第一输入端，所述第二输入端连接所述电源输入端，所述第二输出端也连接所述第一输出端。
  12. 根据权利要求11所述的有机发光二极管显示器，其中
    所述调节单元用于在所述电源输入端的实际电压变大时，降低所述第一输出端的电压。
  13. 根据权利要求12所述的有机发光二极管显示器，其中所述调节单元还用于在所述电源输入端的实际电压变小时，增大所述第一输出端的电压。
  14. 根据权利要求11所述的有机发光二极管显示器，其中
    所述调节单元包括：
    隔直子单元，用于对所述第二输入端输入的所述电源输入端的实际电压进行隔直处理，以产生交流调节电压；
    反馈子单元，用于根据所述交流调节电压对所述电源模块的初始电压进行反馈调节，以产生所述反馈电压。
  15. 根据权利要求14所述的有机发光二极管显示器，其中
    当所述交流反馈电压大于所述预设电压时，所述反馈子单元根据所述交流调节电压和所述电源模块的初始电压获取负的反馈电压，以使所述第一输出端的电压减小。
  16. 根据权利要求14所述的有机发光二极管显示器，其中
    当所述交流反馈电压小于所述预设电压时，所述反馈子单元根据所述交流调节电压和所述电源模块的初始电压获取正的反馈电压，以使所述第一输出端的电压增大。
  17. 根据权利要求14所述的有机发光二极管显示器，其中
    所述反馈电压为所述电源模块的初始电压与所述交流调节电压之间的差值。
  18. 根据权利要求11所述的有机发光二极管显示器，其中
    所述调节单元包括：第一电阻、第二电阻、第三电阻、第四电阻、差分放大器、以及第一电容；所述差分放大器具有原始输入端、反馈输入端、差分输出端；
    所述第一输入端通过所述第一电阻连接至所述原始输入端；
    所述第二输入端与所述第一电容的一端连接，所述第一电容的另一端与所述第三电阻的一端连接，所述第三电阻的另一端与所述反馈输入端连接；
    所述第二输出端连接所述差分输出端；所述反馈输入端和所述差分输出端之间还连接有第四电阻；所述原始输入端还通过所述第二电阻接地。
  19. 根据权利要求10所述的有机发光二极管显示器，其中所述像素驱动单元还具有发光控制端，所述发光控制端用于输入有发光控制信号，所述发光控制信号用于控制所述有机发光二极管是否发光；
    所述像素驱动单元包括：
    第一开关晶体管，第二开关晶体管、第三开关晶体管、第二电容；
    所述第一开关晶体管的控制端连接所述扫描线，所述第一开关晶体管的输入端连接所述数据线，
    所述第三开关晶体管的控制端连接所述发光控制端，所述第三开关晶体管的输入端连接所述电源输入端，所述第三开关晶体管的输出端连接所述第二开关晶体管的输入端；
    所述第二开关晶体管的控制端连接所述第一开关晶体管的输出端，所述第二开关晶体管的输出端连接所述有机发光二极管的阳极，所述有机发光二极管的阴极接直流低电平电源；
    所述第一开关晶体管的输出端还通过所述第二电容连接至所述第二开关晶体管的输入端。
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CN104751798A (zh) * 2015-04-10 2015-07-01 京东方科技集团股份有限公司 像素驱动电路、显示装置和像素驱动方法

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