WO2017041453A1 - 像素电路、其驱动方法及相关装置 - Google Patents

像素电路、其驱动方法及相关装置 Download PDF

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Publication number
WO2017041453A1
WO2017041453A1 PCT/CN2016/074675 CN2016074675W WO2017041453A1 WO 2017041453 A1 WO2017041453 A1 WO 2017041453A1 CN 2016074675 W CN2016074675 W CN 2016074675W WO 2017041453 A1 WO2017041453 A1 WO 2017041453A1
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Prior art keywords
module
control
reset
switching transistor
voltage
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PCT/CN2016/074675
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English (en)
French (fr)
Inventor
王博
玄明花
马占洁
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京东方科技集团股份有限公司
鄂尔多斯市源盛光电有限责任公司
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Priority to US15/307,997 priority Critical patent/US10083658B2/en
Publication of WO2017041453A1 publication Critical patent/WO2017041453A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/043—Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
    • 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
    • G09G2300/0814—Several active elements per pixel in active matrix panels used for selection purposes, e.g. logical AND for partial update
    • 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
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements

Definitions

  • the present invention relates to the field of organic electroluminescence technology, and in particular, to a pixel circuit, a driving method thereof, and related devices.
  • OLED Organic Light Emitting Diode
  • OLEDs are current driven and require a constant current to control illumination. Due to the process process and device aging, etc., the threshold voltage Vth of the driving transistor of the pixel circuit may be non-uniform, which causes the current flowing through each pixel point OLED to change, so that the display brightness is uneven, thereby affecting the whole The display of the image.
  • FIG. 1 is a schematic circuit diagram of a prior art pixel circuit.
  • a pixel circuit of one capacitor (2M1C) of two existing transistors is taken as an example, and the circuit is composed of one driving transistor M2, one switching transistor M1, and one storage capacitor Cs.
  • the scanning line Scan of the row of pixel circuits inputs a low level signal, the P-type switching transistor M1 is turned on, and the voltage of the data line Data is written to the storage capacitor Cs.
  • the signal input by the scan line Scan becomes a high level
  • the P-type switching transistor M1 is turned off, and the gate voltage stored by the storage capacitor Cs causes the driving transistor M2 to generate a current to drive the OLED, thereby ensuring that the OLED is in a The frame continues to glow.
  • the threshold voltage V th of the driving transistor M2 may drift due to process processes and device aging, etc., in addition, due to voltage drop ( The reason for IR Drop) is that the source voltage V S of the driving transistor M2 is also different. This causes the current flowing through each OLED to vary due to the variation of the threshold voltage Vth of the driving transistor and the voltage VDD applied to the source of the driving transistor, resulting in uneven brightness of the image.
  • Embodiments of the present invention provide a pixel circuit, a driving method thereof, and related devices for improving uniformity of image brightness of a display area of a display device.
  • a pixel circuit includes: a first reset module, a data write module, a compensation module, a voltage stabilization module, a drive control module, an illumination control module, and a light emitting device.
  • the first reset module is connected to the voltage stabilizing module, and the first reset module is configured to reset the voltage stabilizing module.
  • the data writing module is connected to the voltage stabilizing module, and the data writing module is configured to provide the data signal to the voltage stabilizing module.
  • the compensation module is connected to the voltage stabilization module and the drive control module, and the compensation module is configured to store the threshold voltage of the drive control module in the voltage stabilization module.
  • the voltage regulator module is coupled to the drive control module, and the voltage regulator module is configured to store a voltage for controlling the drive control module.
  • the drive control module is coupled to the illumination control module, and the drive control module is configured to drive the illumination device.
  • the illumination control module is coupled to the drive control module and the illumination device, and the illumination control module is configured to control driving of the illumination control device by the drive control module.
  • the light emitting device is coupled to the light emission control module, the light emitting device being configured to emit light under the drive of the drive control module.
  • the first reset module includes a control end, a first input end, a second input end, a first output end, and a second output end.
  • the data writing module includes a control end, an input end, and an output end.
  • the compensation module includes a control end, an input end, and an output end.
  • the voltage stabilizing module includes a first end and a second end.
  • the drive control module includes a control end, an input end, and an output end.
  • the illumination control module includes a control end, a first input end, a second input end, a first output end, and a second output end.
  • the light emitting device includes a first end and a second end.
  • the control end of the first reset module is connected to the first reset control signal end, the first input end is respectively connected to the input end of the drive control module and the first reference signal end, and the second input end is connected to the initialization signal end, the first output end Separately with the first end of the voltage regulator module, data write
  • the output end of the input module is connected to the first output end of the illumination control module, and the second output end is respectively connected to the second end of the voltage stabilization module, the control end of the drive control module, and the output end of the compensation module.
  • the first reset module is configured to reset the potentials of the first end and the second end of the voltage stabilizing module under the control of the signal of the first reset control signal terminal.
  • the control end of the data writing module is connected to the write control signal end, and the input end is connected to the data signal end.
  • the data writing module is configured to provide the data signal of the data signal end to the first end of the voltage stabilizing module under the control of the signal written to the control signal terminal.
  • the control end of the compensation module is connected to the compensation control signal end, and the input end is respectively connected to the output end of the drive control module and the second input end of the illumination control module.
  • the compensation module is configured to store the threshold voltage of the drive control module in the voltage stabilization module under the control of the signal of the compensation control signal terminal.
  • the control end of the illumination control module is connected to the illumination control signal end, the first input end is connected to the third reference signal end, the second output end is connected to the first end of the illumination device, and the second end and the second reference signal end of the illumination device are Connected.
  • the illumination control module is configured to control driving of the illumination control module by the drive control module under control of a signal at the end of the illumination control signal.
  • the drive control module includes a drive transistor.
  • the driving transistor, the gate is a control end of the driving control module, the first electrode is an input end of the driving control module, and the second electrode is an output end of the driving control module.
  • the first reset module includes: a first switching transistor and a second switching transistor.
  • the first switching transistor has a gate as a control end of the first reset module, the first electrode is a first input end of the first reset module, and the second electrode is a first output end of the first reset module.
  • the second switching transistor has a first electrode as a second input end of the first reset module and a second electrode as a second output end of the first reset module.
  • the gate of the first switching transistor is coupled to the gate of the second switching transistor.
  • the data writing module comprises: a third switching transistor.
  • the third switching transistor has a gate as a control end of the data writing module, a first electrode is an input end of the data writing module, and a second electrode is an output end of the data writing module.
  • the compensation module comprises: a fourth switching transistor.
  • the fourth switching transistor has a gate as a control end of the compensation module, a first electrode is an input end of the compensation module, and a second electrode is an output end of the compensation module.
  • the voltage stabilizing module comprises: a capacitor.
  • the first electrode of the capacitor is the first end of the voltage regulator module, and the second electrode of the capacitor is the second end of the voltage regulator module.
  • the illumination control module includes a fifth switching transistor and a sixth switching transistor.
  • the fifth switching transistor has a gate as a control end of the illumination control module, the first electrode is a first input end of the illumination control module, and the second electrode is a first output end of the illumination control module.
  • the sixth switching transistor the first electrode is a second input end of the illumination control module, and the second electrode is a second output end of the illumination control module.
  • the gate of the fifth switching transistor is connected to the gate of the sixth switching transistor.
  • the pixel circuit further includes: a second reset module.
  • the second reset module is coupled to the light emitting device, and the second reset module is configured to reset the light emitting device.
  • the second reset module includes a control terminal, an input terminal, and an output terminal.
  • the control end and the input end of the second reset module are both connected to the second reset control signal end, and the output end is connected to the first end of the light emitting device.
  • the second reset module is configured to reset the potential of the first end of the light emitting device under the control of the signal of the second reset control signal terminal.
  • the second reset module comprises: a seventh switching transistor.
  • the seventh switching transistor has a gate as a control end of the second reset module, the first electrode is an input end of the second reset module, and the second electrode is an output end of the second reset module.
  • the drive transistor is a P-type transistor.
  • the switching transistor is a P-type transistor or an N-type transistor.
  • the voltages of the first reference signal end and the third reference signal end are both a high level voltage, and the voltage of the second reference signal end is a low level voltage or ground.
  • a driving method of a pixel circuit for driving the pixel circuit comprising: a reset phase: providing an effective control signal for the first reset module.
  • the first reset module resets the voltage regulator module.
  • Write compensation phase Provides effective control signals for the data write module and the compensation module.
  • the data write module provides the data signal to the voltage regulator module.
  • the compensation module stores the threshold voltage of the drive control module in the voltage stabilization module.
  • Illumination phase Provides an effective control signal for the illumination control module.
  • the illumination control module controls the driving of the illumination control device by the drive control module.
  • the drive control module is driven under the control of the voltage stored by the voltage regulator module
  • the light emitting device emits light.
  • the pixel circuit includes a second reset module, the second reset module being coupled to the light emitting device, and the second reset module being configured to reset the light emitting device.
  • the write compensation phase further includes: the second reset module resetting the light emitting device.
  • an organic electroluminescence display panel comprising any of the above pixel circuits.
  • a display device comprising any of the above-described organic electroluminescent display panels.
  • the pixel circuit, the driving method thereof and the related device provided by the embodiment of the invention include: a first reset module, a data writing module, a compensation module, a voltage stabilizing module, a driving control module, an illuminating control module and a light emitting device.
  • the first reset module is configured to reset the potentials of the first end and the second end of the voltage stabilizing module under the control of the signal of the first reset control signal end.
  • the data writing module is configured to provide a signal of the data signal end to the first end of the voltage stabilizing module under the control of the signal written on the control signal end.
  • the compensation module is configured to store the threshold voltage of the drive control module in the voltage stabilization module under the control of the signal at the compensation control signal end.
  • the illuminating control module is configured to control the driving control module to drive the illuminating device to emit light under the control of the signal of the illuminating control signal end.
  • the pixel circuit can compensate for the drift of the threshold voltage of the driving control module by the cooperation of the above modules. Therefore, during the light-emitting display, the driving current for driving the light-emitting device can be related to the voltage of the data signal, and the threshold of the driving control module.
  • the voltage is independent of the voltage of the first reference signal terminal, and the influence of the threshold voltage and the voltage drop (IR Drop) on the current flowing through the light emitting device can be avoided, so that the operating current for driving the light emitting device to be kept consistent, and the image brightness of the display area of the display device is improved. Uniformity.
  • FIG. 1 is a schematic circuit diagram of a prior art pixel circuit
  • FIG. 2 is a schematic structural view of a pixel circuit according to a first embodiment of the present invention
  • FIG. 3 is a schematic circuit diagram of the pixel circuit shown in FIG. 2;
  • FIG. 4 is another schematic circuit diagram of the pixel circuit shown in FIG. 2;
  • FIG. 5 is a schematic structural diagram of a pixel circuit according to a second embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a pixel circuit according to a third embodiment of the present invention.
  • Figure 7 is a schematic circuit diagram of the pixel circuit shown in Figure 6;
  • FIG. 8 is another schematic circuit diagram of the pixel circuit shown in FIG. 6;
  • FIG. 9 is a circuit timing diagram of the pixel circuit shown in FIG. 7;
  • FIG. 10 is a circuit timing diagram of the pixel circuit shown in FIG. 8;
  • FIG. 11 is a schematic flow chart of a driving method of a pixel circuit according to a fourth embodiment of the present invention.
  • the pixel circuit of the first embodiment includes: a first reset module 1, a data write module 2, a compensation module 3, a voltage stabilization module 4, a drive control module 5, an illumination control module 6, and a light-emitting device D.
  • the first reset module 1 is connected to the voltage stabilizing module 4, and the first reset module 1 is configured to reset the voltage stabilizing module 4.
  • the data writing module 2 is connected to the voltage stabilizing module 4, and the data writing module 2 is configured to supply the data signal to the voltage stabilizing module 4.
  • the compensation module 3 is connected to the voltage stabilization module 4 and the drive control module 5, and the compensation module 3 is configured to store the threshold voltage of the drive control module 5 in the voltage stabilization module 4.
  • the voltage stabilizing module 4 is connected to the drive control module 5, and the voltage stabilizing module 4 is configured to store a voltage for controlling the drive control module 5.
  • the drive control module 5 is coupled to the illumination control module 6, which is configured to drive the illumination device D.
  • the illumination control module 6 is coupled to the drive control module 5 and the illumination device D, and the illumination control module 6 is configured to control the drive of the illumination control device 5 by the drive control module 5.
  • Light-emitting device D and The illumination control module 6 is connected, and the illumination device D is configured to emit light under the drive of the drive control module 5.
  • the first reset module 1 includes a control end, a first input end, a second input end, a first output end, and a second output end.
  • the data writing module 2 includes a control terminal, an input terminal, and an output terminal.
  • the compensation module 3 includes a control end, an input end, and an output end.
  • the voltage stabilizing module 4 includes a first end and a second end.
  • the drive control module 5 includes a control terminal, an input terminal, and an output terminal.
  • the illumination control module 6 includes a control end, a first input end, a second input end, a first output end, and a second output end.
  • the light emitting device D includes a first end and a second end.
  • the control end of the first reset module 1 is connected to the first reset control signal end Reset1, and the first input end is respectively connected to the input end of the drive control module 5 and the first reference signal end VDD, and the second input end and the initialization signal end are respectively connected.
  • the Vinit is connected, and the first output end is respectively connected to the first end of the voltage stabilizing module 4, the output end of the data writing module 2, and the first output end of the lighting control module 6, and the second output end is respectively connected with the voltage stabilizing module 4
  • the two ends, the control end of the drive control module 5 and the output end of the compensation module 3 are connected.
  • the first reset module 1 is configured to reset the potentials of the first end and the second end of the voltage stabilizing module 4 under the control of the signal of the first reset control signal end Reset1.
  • the control terminal of the data writing module 2 is connected to the write control signal terminal Scan1, and the input terminal is connected to the data signal terminal Data.
  • the data writing module 2 is configured to supply the data signal of the data signal terminal Data to the first end of the voltage stabilizing module 4 under the control of the signal written to the control signal terminal Scan1.
  • the control end of the compensation module 3 is connected to the compensation control signal end Scan2, and the input end is connected to the output end of the drive control module 5 and the second input end of the illumination control module 6, respectively.
  • the compensation module 3 is configured to store the threshold voltage of the drive control module 5 in the voltage stabilization module 4 under the control of the signal of the compensation control signal terminal Scan2.
  • the control end of the illuminating control module 6 is connected to the illuminating control signal end EM, the first input end is connected to the third reference signal end Vref, the second output end is connected to the first end of the illuminating device D, and the second end of the illuminating device D is The second reference signal terminal VSS is connected.
  • the illumination control module 6 is configured to control the driving of the illumination control device 5 by the drive control module 5 under the control of the signal of the illumination control signal terminal EM.
  • the above pixel circuit includes: a first reset module, data writing Module, compensation module, voltage regulator module, drive control module, illumination control module and lighting device.
  • the first reset module is configured to reset the potentials of the first end and the second end of the voltage stabilizing module under the control of the signal of the first reset control signal end.
  • the data writing module is configured to provide a signal of the data signal end to the first end of the voltage stabilizing module under the control of the signal written on the control signal end.
  • the compensation module is configured to store the threshold voltage of the drive control module in the voltage stabilization module under the control of the signal at the compensation control signal end.
  • the illuminating control module is configured to control the driving control module to drive the illuminating device to emit light under the control of the signal of the illuminating control signal end.
  • the pixel circuit can compensate for the drift of the threshold voltage of the driving control module by the cooperation of the above modules. Therefore, during the light-emitting display, the driving current for driving the light-emitting device can be related to the voltage of the data signal, and the threshold of the driving control module.
  • the voltage is independent of the voltage of the first reference signal terminal, and the influence of the threshold voltage and the voltage drop (IR Drop) on the current flowing through the light emitting device can be avoided, so that the operating current for driving the light emitting device to be kept consistent, and the image brightness of the display area of the display device is improved. Uniformity.
  • FIG. 3 is a schematic circuit diagram of the pixel circuit shown in FIG. 4 is another schematic circuit diagram of the pixel circuit shown in FIG. 2.
  • the light emitting device D in the pixel circuit may be an organic light emitting diode OLED.
  • OLED organic light emitting diode
  • the anode of the organic light emitting diode is the first end of the light emitting device
  • the cathode is the second end of the light emitting device
  • the organic light emitting diode realizes the light emitting display under the action of the saturation current of the driving control module.
  • the drive control module 5 may include a drive transistor DT.
  • the driving transistor DT has a gate which is a control end of the driving control module 5, a first electrode is an input end of the driving control module 5, and a second electrode is an output end of the driving control module 5.
  • the drive transistor DT may be a P-type transistor. Since the threshold voltage Vth of the P-type transistor is a negative value, in order to ensure that the driving transistor DT can work normally, the voltage of the corresponding first reference signal terminal VDD can be a high level voltage, and the voltage of the second reference reference signal terminal VSS can be The ground voltage is either a low level voltage.
  • the voltage of the third reference signal terminal Vref may be consistent with the voltage of the first reference signal terminal VDD, and is also a high level voltage.
  • the above is only a specific structure of the drive control module in the pixel circuit.
  • the specific structure of the drive control module is not limited to the above structure, and may be other structures known to those skilled in the art, and is not used here. limited.
  • the first reset module 1 may include: a first switching transistor T1 and a second switching transistor T2.
  • the first switching transistor T1 has a gate connected to the gate of the second switching transistor T2 and is a control terminal of the first reset module 1.
  • the first electrode is a first input end of the first reset module 1, and the second electrode is It is the first output of the first reset module 1.
  • the second switching transistor T2 has a first electrode as a second input end of the first reset module 1 and a second electrode as a second output end of the first reset module 1 .
  • the first switching transistor T1 and the second switching transistor T2 may be N-type transistors. At this time, when the potential of the first reset control signal end Reset1 is high. When the first switching transistor T1 and the second switching transistor T2 are in an on state, the first switching transistor T1 and the second switching transistor T2 are in an off state when the potential of the first reset control signal terminal Reset1 is low.
  • the first switching transistor T1 and the second switching transistor T2 may also be P-type transistors.
  • the first switching transistor T1 and the first The second switching transistor T2 is in an on state, and the first switching transistor T1 and the second switching transistor T2 are in an off state when the potential of the first reset control signal terminal Reset1 is high. This is not limited here.
  • the signal of the first reference signal end is turned on.
  • the first switching transistor is transmitted to the first end of the voltage stabilizing module, and the signal of the initializing signal end is transmitted to the second end of the voltage stabilizing module through the turned-on second switching transistor, thereby respectively respectively facing the first end and the second end of the voltage stabilizing module The potential is reset.
  • the above is only a specific structure of the first reset module in the pixel circuit.
  • the specific structure of the first reset module is not limited to the above structure provided by the embodiment of the present invention, and may be known to those skilled in the art. Other structures are not limited here.
  • the data writing module 2 may include a third switching transistor T3.
  • the third switching transistor T3 has a gate of the data writing module 2
  • the control terminal, the first electrode is the input end of the data writing module 2, and the second electrode is the output end of the data writing module 2.
  • the third switching transistor T3 may be an N-type transistor. At this time, when the potential of the write control signal terminal Scan1 is high, the third switching transistor T3 is at In the on state, the third switching transistor T3 is in an off state when the potential of the write control signal terminal Scan1 is low.
  • the third switching transistor T3 may also be a P-type transistor. At this time, when the potential of the write control signal terminal Scan1 is low, the third switching transistor T3 is in an on state, when writing control When the potential of the signal terminal Scan1 is at a high potential, the third switching transistor T3 is in an off state. This is not limited here.
  • the third switching transistor when the third switching transistor is in an on state under the control of the signal written to the control signal end, the signal of the data signal end is transmitted to the stable through the turned-on third switching transistor.
  • the first end of the module is pressed to implement the data writing function.
  • the above is only a specific structure of the data writing module in the pixel circuit.
  • the specific structure of the data writing module is not limited to the above structure provided by the embodiment of the present invention, and may be known to those skilled in the art. Other structures are not limited here.
  • the compensation module 3 may include: a fourth switching transistor T4.
  • the fourth switching transistor T4 has a gate that is a control end of the compensation module 3, a first electrode is an input end of the compensation module 3, and a second electrode is an output end of the compensation module 3.
  • the fourth switching transistor T4 may be an N-type transistor. At this time, when the potential of the compensation control signal terminal Scan2 is high, the fourth switching transistor T4 is in a guide. In the on state, the fourth switching transistor T4 is in an off state when the potential of the compensation control signal terminal Scan2 is low.
  • the fourth switching transistor T4 may also be a P-type transistor. At this time, when the potential of the compensation control signal terminal Scan2 is low, the fourth switching transistor T4 is in an on state, and when the compensation control signal end is When the potential of Scan2 is high, the fourth switching transistor T4 is in an off state. This is not limited here.
  • the fourth switching transistor when the fourth switching transistor is in an on state under the control of the signal of the compensation control signal end, the fourth switching transistor connects the driving transistor to a diode structure, and the first reference signal end Signal driving through the diode structure
  • the body tube is transmitted to the second end of the voltage stabilizing module, thereby storing the threshold voltage of the driving transistor in the voltage stabilizing module.
  • the compensation control signal terminal Scan2 may be the same signal terminal as the write control signal terminal Scan1.
  • the above is only a specific structure of the compensation module in the pixel circuit.
  • the specific structure of the compensation module is not limited to the above structure provided by the embodiment of the present invention, and may be other structures known to those skilled in the art. There is no limit here.
  • the voltage stabilizing module 4 may include a capacitor C.
  • the first electrode of the capacitor C is the first end of the voltage stabilizing module 4, and the second electrode of the capacitor C is the second end of the voltage stabilizing module 4.
  • the illumination control module 6 may include a fifth switching transistor T5 and a sixth switching transistor T6.
  • the fifth switching transistor T5 has a gate connected to the gate of the sixth switching transistor T6 and is a control end of the illumination control module 6.
  • the first electrode is a first input end of the illumination control module 6, and the second electrode is illuminated.
  • the sixth switching transistor T6 has a first electrode as a second input end of the illumination control module 6 and a second electrode as a second output end of the illumination control module 6.
  • the fifth switching transistor T5 and the sixth switching transistor T6 may be N-type transistors. In this case, when the potential of the compensation control signal terminal Scan2 is high, The five-switching transistor T5 and the sixth switching transistor T6 are in an on state, and the fifth switching transistor T5 and the sixth switching transistor T6 are in an off state when the potential of the compensation control signal terminal Scan2 is low.
  • the fifth switching transistor T5 and the sixth switching transistor T6 may also be P-type transistors.
  • the fifth switching transistor T5 and the sixth switch The transistor T6 is in an on state, and the fifth switching transistor T5 and the sixth switching transistor T6 are in an off state when the potential of the compensation control signal terminal Scan2 is at a high potential. This is not limited here.
  • the sixth switching transistor when the fifth switching transistor and the sixth switching transistor are in an on state under the control of the signal of the light emission control signal end, the sixth switching transistor that is turned on makes the driving control module The output end is electrically connected to the light emitting device, and the signal of the third reference signal end is transmitted to the first end of the voltage stabilizing module through the turned-on fifth switching transistor, and the voltage control module controls the driving control module to drive the light emitting device to emit light.
  • the above is only a specific structure of the compensation module in the pixel circuit.
  • the specific structure of the compensation module is not limited to the above structure provided by the embodiment of the present invention, and may be other structures known to those skilled in the art. There is no limit here.
  • the voltage of the third reference signal terminal may be equal to the voltage of the first reference signal terminal, which is not limited herein.
  • Fig. 5 is a schematic structural view of a pixel circuit in accordance with a second embodiment of the present invention.
  • the pixel circuit of the second embodiment further includes: a second reset module 7.
  • the control end and the input end of the second reset module 7 are both connected to the second reset control signal end Reset2, and the output end is connected to the first end of the light emitting device D.
  • the second reset module 7 is configured to reset the potential of the first end of the light emitting device D under the control of the second reset control signal end Reset2 to make the display at a low gray level darker and improve the contrast.
  • Fig. 6 is a schematic structural view of a pixel circuit in accordance with a third embodiment of the present invention.
  • the compensation control signal terminal Scan2, the write control signal terminal Scan1, and the second reset control signal terminal Reset2 may be the same signal terminal (wherein the writing in FIG. 6 is used).
  • the control signal terminal Scan1 replaces the compensation control signal terminal Scan2 and the second reset control signal terminal Reset2).
  • FIG. 7 is a schematic circuit diagram of the pixel circuit shown in FIG. 6.
  • FIG. 8 is another schematic circuit diagram of the pixel circuit shown in FIG. 6.
  • the second reset module 7 may include a seventh switching transistor T7.
  • the seventh switching transistor T7 has its gate as the control end of the second reset module 7, the first electrode is the input end of the second reset module 7, and the second electrode is the output end of the second reset module 7.
  • the seventh switching transistor T7 may be an N-type transistor. At this time, when the potential of the second reset control signal terminal Reset2 is high. The seventh switching transistor T7 is in an on state, and the seventh switching transistor T7 is in an off state when the potential of the second reset control signal end Reset2 is low.
  • the seventh switching transistor T7 may also be a P-type transistor. At this time, when the potential of the second reset control signal end Reset2 is low, the seventh switching transistor T7 is in an on state, and when the second When the potential of the reset control signal terminal Reset2 is high, the seventh switching transistor T7 is in an off state. This is not limited here.
  • the seventh switching transistor when the seventh switching transistor is in an on state under the control of the signal of the second reset control signal end, the signal of the second reset control signal end passes through the turned-on seventh switching transistor.
  • the first end of the light emitting device is transmitted to reset the potential of the first end of the light emitting device.
  • the above is only a specific structure of the second reset module in the pixel circuit.
  • the specific structure of the second reset module is not limited to the above structure provided by the embodiment of the present invention, and may be known to those skilled in the art. Other structures are not limited here.
  • the driving transistor and the switching transistor mentioned in the above embodiments of the present invention may be a thin film transistor (TFT) or a metal oxide semiconductor field effect transistor (MOS, Metal Oxide Scmiconductor). Not limited.
  • the first electrode and the second electrode of the transistors may be interchanged according to the type of the transistor and the input signal, and no specific distinction is made here.
  • the transistor when the transistor is a P-type transistor, the first electrode is the source and the second electrode is the drain. When the transistor is an N-type transistor, the first electrode is a drain and the second electrode is a source.
  • all of the switching transistors may be P-type transistors or both N-type transistors, which are not limited herein.
  • the driving transistor and the switching transistor mentioned in the embodiment of the present invention can all be designed with a P-type transistor, which simplifies the fabrication process of the pixel circuit.
  • the working process of the pixel circuit provided by the embodiment of the present invention will be described below by taking the pixel circuit shown in FIG. 7 and FIG. 8 as an example.
  • the first end of the capacitor C is the first node A
  • the second end of the capacitor C is the second node B.
  • a high level signal is indicated by 1
  • a low level signal is indicated by 0.
  • the driving transistor DT is a P-type transistor, and all of the switching transistors are N-type transistors, and each of the N-type transistors is turned on under a high level and turned off at a low level.
  • FIG. 9 is a circuit timing diagram of the pixel circuit shown in FIG. 7. Hereinafter, three stages of T1, T2, and T3 in the input timing chart shown in FIG. 9 are selected for explanation.
  • the first switching transistor T1 and the second switching transistor T2 are in an on state, and the third switching transistor T3, the fourth switching transistor T4, the fifth switching transistor T5, the sixth switching transistor T6, and the seventh switching transistor T7 are in an off state.
  • the signal of the first reference signal terminal VDD is transmitted to the first node A through the turned-on first switching transistor T1
  • the signal of the initialization signal terminal Vinit is transmitted to the second node B through the turned-on second switching transistor T2 thus, this stage
  • the voltage of the first node A is reset to the voltage of the first reference signal terminal VDD
  • the voltage of the second node B is reset to the voltage of the initialization signal terminal Vinit.
  • the third switching transistor T3, the fourth switching transistor T4, and the seventh switching transistor T7 are in an on state, and the first switching transistor T1, the second switching transistor T2, the fifth switching transistor T5, and the sixth switching transistor T6 are in an off state.
  • the turned-on fourth switching transistor T4 connects the driving transistor DT to a diode structure, and the signal of the data signal terminal Data is transmitted to the first node A through the turned-on third switching transistor T3, so that the voltage of the first electrical node A is a data signal.
  • the voltage of the terminal Data V data the signal of the first reference signal terminal VDD is transmitted to the second node B through the driving transistor DT of the diode structure, so the voltage of the second node B is V DD +V th , where V DD is the first reference
  • the voltage of the signal terminal VDD, V th is the threshold voltage of the driving transistor DT.
  • the signal written to the control signal terminal Scan1 is transmitted to the first end of the light emitting device D through the turned-on seventh switching transistor T7.
  • the fifth switching transistor T5 and the sixth switching transistor T6 are in an on state, and the first switching transistor T1, the second switching transistor T2, the third switching transistor T3, the fourth switching transistor T4, and the seventh switching transistor T7 are in an off state.
  • the signal of the third reference signal terminal Vref is transmitted to the first node A through the turned-on first switching transistor, and the potential of the first node A is changed from V data of the previous stage to V ref , where V ref is the third reference signal end voltage Vref due to the capacitance C, according to the principle of conservation of charge the capacitance, the voltage of the second node B from the V DD + V th stage becomes V DD + V th + V ref -V data.
  • the voltage of the gate of the driving transistor DT is maintained at V DD +V th +V ref -V data
  • the source voltage of the driving transistor DT is the voltage V DD of the first reference signal terminal VDD
  • the driving transistor The DT operation is in a saturated state.
  • the operating current I OLED of the organic light emitting diode OLED is not affected by the threshold voltage V th of the driving transistor DT, and is independent of the voltage V DD of the first reference signal terminal VDD, and only the voltage V of the data signal terminal Data
  • the data is related to the voltage V ref of the third reference signal terminal Verf, which completely solves the operation of the threshold voltage V th of the driving transistor DT and the voltage drop (IR Drop) on the organic light emitting diode OLED due to the process process and long-time operation.
  • the effect of the current I OLED improves the unevenness of the panel display.
  • FIG. 10 is a circuit timing diagram of the pixel circuit shown in FIG. Hereinafter, three stages of T1, T2, and T3 in the input timing chart shown in FIG. 10 are selected.
  • the first switching transistor T1 and the second switching transistor T2 are in an on state, and the third switching transistor T3, the fourth switching transistor T4, the fifth switching transistor T5, the sixth switching transistor T6, and the seventh switching transistor T7 are in an off state.
  • the signal of the first reference signal terminal VDD is transmitted to the first node A through the turned-on first switching transistor T1
  • the signal of the initialization signal terminal Vinit is transmitted to the second node B through the turned-on second switching transistor T2 thus, this stage
  • the voltage of the first node A is reset to the voltage of the first reference signal terminal VDD
  • the voltage of the second node B is reset to the voltage of the initialization signal terminal Vinit.
  • the third switching transistor T3, the fourth switching transistor T4, and the seventh switching transistor T7 are in an on state, and the first switching transistor T1, the second switching transistor T2, the fifth switching transistor T5, and the sixth switching transistor T6 are in an off state.
  • the turned-on fourth switching transistor T4 connects the driving transistor DT to a diode structure, and the signal of the data signal terminal Data is transmitted to the first node A through the turned-on third switching transistor T3, so that the voltage of the first electrical node A is a data signal.
  • the voltage of the terminal Data V data , the signal of the first reference signal terminal VDD is transmitted to the second node B through the driving transistor DT of the diode structure, so the voltage of the second node B is V DD +V th , where V DD is the first reference
  • the voltage of the signal terminal VDD, V th is the threshold voltage of the driving transistor DT.
  • the signal simultaneously written to the control signal terminal Scan1 is transmitted to the first end of the light emitting device D through the turned-on seventh switching transistor T7.
  • the fifth switching transistor T5 and the sixth switching transistor T6 are in an on state, and the first switching transistor T1, the second switching transistor T2, the third switching transistor T3, the fourth switching transistor T4, and the seventh switching transistor T7 are in an off state.
  • the signal of the third reference signal terminal Vref is transmitted to the first node A through the turned-on first switching transistor, and the potential of the first node A is changed from V data of the previous stage to V ref , where V ref is the third reference signal end voltage Vref due to the capacitance C, according to the principle of conservation of charge the capacitance, the voltage of the second node B from the V DD + V th stage becomes V DD + V th + V ref -V data.
  • the voltage of the gate of the driving transistor DT is maintained at V DD +V th +V ref -V data
  • the source voltage of the driving transistor DT is the voltage V DD of the first reference signal terminal VDD
  • the driving transistor The DT operation is in a saturated state.
  • the operating current I OLED of the organic light emitting diode OLED is not affected by the threshold voltage V th of the driving transistor DT, and is independent of the voltage V DD of the first reference signal terminal VDD, and only the voltage V of the data signal terminal Data
  • the data is related to the voltage V ref of the third reference signal terminal Verf, which completely solves the problem that the threshold voltage V th1 of the driving transistor DT and the voltage drop (IR Drop) work on the organic light emitting diode OLED due to the process process and long-time operation.
  • the effect of the current I OLED improves the unevenness of the panel display.
  • a fourth embodiment of the present invention further provides a driving method of a pixel circuit for driving any of the above pixel circuits, comprising: a reset phase: providing an effective control signal for the first reset module.
  • the first reset module resets the voltage regulator module.
  • Write compensation phase Provides effective control signals for the data write module and the compensation module.
  • the data write module provides the data signal to the voltage regulator module.
  • the compensation module stores the threshold voltage of the drive control module in the voltage stabilization module.
  • Illumination phase Provides an effective control signal for the illumination control module.
  • the illumination control module controls the driving of the illumination control device by the drive control module.
  • the drive control module drives the light emitting device to emit light under the control of the voltage stored by the voltage stabilizing module.
  • FIG. 11 is a schematic flow chart of a driving method of a pixel circuit according to a fourth embodiment of the present invention.
  • the first reset module resets the potentials of the first end and the second end of the voltage stabilizing module under the control of the signal of the first reset control signal terminal.
  • the data write module is configured to provide a signal of the data signal end to the first end of the voltage stabilization module under the control of the signal written to the control signal terminal.
  • the compensation module stores the threshold voltage of the drive control module in the voltage stabilization module under the control of the signal of the compensation control signal end.
  • the illuminating control module controls the driving control module to drive the illuminating device to emit light under the control of the signal of the illuminating control signal end.
  • the writing compensation stage when the second reset module is included in the pixel circuit, the writing compensation stage further includes: the second reset module is configured to control the first end of the light emitting device under the control of the signal of the second reset control signal end The potential is reset.
  • an organic electroluminescence display panel comprising any of the above pixel circuits. Since the principle of solving the problem of the organic electroluminescent display panel is similar to that of the foregoing pixel circuit, the implementation of the pixel circuit in the organic electroluminescent display panel can be referred to the implementation of the pixel circuit in the foregoing example, and the repeated description is omitted.
  • a display device comprising the above organic electroluminescence display panel.
  • the display device may be a display, a mobile phone, a television, a notebook, an all-in-one, etc., and other essential components for the display device are those of ordinary skill in the art. It should be understood that the description is not intended to be exhaustive or to limit the invention.
  • the pixel circuit, the driving method thereof and the related device provided by the embodiment of the invention include: a first reset module, a data writing module, a compensation module, a voltage stabilizing module, a driving control module, an illumination control module and a light emitting device.
  • the first reset module is configured to reset the potentials of the first end and the second end of the voltage stabilizing module under the control of the signal of the first reset control signal end.
  • the data writing module is configured to provide a signal of the data signal end to the first end of the voltage stabilizing module under the control of the signal written on the control signal end.
  • the compensation module is configured to store the threshold voltage of the drive control module in the voltage stabilization module under the control of the signal at the compensation control signal end.
  • the illuminating control module is configured to control the driving control module to drive the illuminating device to emit light under the control of the signal of the illuminating control signal end.
  • the pixel circuit can compensate for the drift of the threshold voltage of the driving control module by the cooperation of the above modules. Therefore, during the light-emitting display, the driving current for driving the light-emitting device can be related to the voltage of the data signal, and the threshold of the driving control module.
  • the voltage is independent of the voltage of the first reference signal terminal, and the influence of the threshold voltage and the voltage drop (IR Drop) on the current flowing through the light emitting device can be avoided, so that the operating current for driving the light emitting device to be kept consistent, and the image brightness of the display area of the display device is improved. Uniformity.

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Abstract

一种像素电路、其驱动方法及显示装置。像素电路包括：第一复位模块（1）、数据写入模块（2）、补偿模块（3）、稳压模块（4）、驱动控制模块（5）、发光控制模块（6）和发光器件（D）。通过上述各模块的配合工作，像素电路可以补偿驱动控制模块（5）的阈值电压的漂移。因此，在发光显示时，可以使驱动发光器件（D）发光的驱动电流与数据信号的电压有关，与驱动控制模块（5）的阈值电压和第一参考信号端（VDD）的电压无关，从而避免阈值电压和压降（IR Drop）对流过发光器件（D）的电流的影响，使得驱动发光器件（D）发光的工作电流保持一致，提高显示装置显示区域图像亮度的均匀性。

Description

像素电路、其驱动方法及相关装置
本申请要求2015年9月10日递交的中国专利申请第201510575125.1号的优先权，在此全文引用上述中国专利申请所公开的内容以作为本申请的一部分。
技术领域
本发明涉及有机电致发光技术领域，尤其涉及像素电路、其驱动方法及相关装置。
背景技术
有机发光显示器(Organic Light Emitting Diode，OLED)是当今平板显示器研究领域的热点之一。与液晶显示器相比，OLED具有低能耗、低生产成本、自发光、宽视角及响应速度快等优点。目前，在手机、PDA、数码相机等显示领域OLED已经开始取代传统的LCD显示屏。其中，像素电路设计是OLED显示器核心技术内容，具有重要的研究意义。
与LCD利用稳定的电压控制亮度不同，OLED属于电流驱动，需要稳定的电流来控制发光。由于工艺制程和器件老化等原因，会使像素电路的驱动晶体管的阈值电压Vth存在不均匀性，这样就导致了流过每个像素点OLED的电流发生变化使得显示亮度不均，从而影响整个图像的显示效果。
图1为现有技术的像素电路的示意性的电路图。如图1所示，以现有的2个晶体管1个电容(2M1C)的像素电路为例，该电路由1个驱动晶体管M2，一个开关晶体管M1和一个存储电容Cs组成。当某一行的像素电路被扫描时时，该行像素电路的扫描线Scan输入低电平信号，P型的开关晶体管M1导通，数据线Data的电压写入存储电容Cs。当该行扫描结束后，扫描线Scan输入的信号变为高电平，P型的开关晶体管M1关断，存储电容Cs存储的栅极电压使驱动晶体管M2产生电流来驱动OLED，保证OLED在一帧内持续发光。驱动晶体管M2的饱和电流公式为IOLED＝K(VSG-Vth)2， 正如前述，由于工艺制程和器件老化等原因，驱动晶体管M2的阈值电压Vth会漂移，此外，由于压降(IR Drop)的原因，驱动晶体管M2的源极电压VS也会不同。这样就导致了流过每个OLED的电流因驱动晶体管的阈值电压Vth和在驱动晶体管的源极施加的电压VDD的变化而变化，从而导致图像亮度不均匀。
发明内容
本发明实施例提供了像素电路、其驱动方法及相关装置，用以提高显示装置显示区域图像亮度的均匀性。
根据本发明的第一个方面，提供了一种像素电路，包括：第一复位模块、数据写入模块、补偿模块、稳压模块、驱动控制模块、发光控制模块和发光器件。其中，第一复位模块与稳压模块连接，第一复位模块被配置为对稳压模块进行复位。数据写入模块与稳压模块连接，数据写入模块被配置为将数据信号提供给稳压模块。补偿模块与稳压模块以及驱动控制模块连接，补偿模块被配置为将驱动控制模块的阈值电压储存在稳压模块中。稳压模块与驱动控制模块连接，稳压模块被配置为存储用于控制驱动控制模块的电压。驱动控制模块与发光控制模块连接，驱动控制模块被配置为驱动发光器件。发光控制模块与驱动控制模块以及发光器件连接，发光控制模块被配置为控制驱动控制模块对于发光器件的驱动。发光器件与发光控制模块连接，发光器件被配置为在驱动控制模块的驱动下发光。
在本发明的实施例中，第一复位模块包括控制端、第一输入端、第二输入端、第一输出端和第二输出端。数据写入模块包括控制端、输入端和输出端。补偿模块包括控制端、输入端和输出端。稳压模块包括第一端和第二端。驱动控制模块包括控制端、输入端和输出端。发光控制模块包括控制端、第一输入端、第二输入端、第一输出端和第二输出端。发光器件包括第一端和第二端。第一复位模块的控制端与第一复位控制信号端相连，第一输入端分别与驱动控制模块的输入端和第一参考信号端相连，第二输入端与初始化信号端相连，第一输出端分别与稳压模块的第一端、数据写 入模块的输出端和发光控制模块的第一输出端相连，第二输出端分别与稳压模块的第二端、驱动控制模块的控制端和补偿模块的输出端相连。第一复位模块被配置为在第一复位控制信号端的信号的控制下，对稳压模块的第一端和第二端的电位进行复位。数据写入模块的控制端与写入控制信号端相连，输入端与数据信号端相连。数据写入模块被配置为在写入控制信号端的信号的控制下，将数据信号端的数据信号提供给稳压模块的第一端。补偿模块的控制端与补偿控制信号端相连，输入端分别与驱动控制模块的输出端和发光控制模块的第二输入端相连。补偿模块被配置为在补偿控制信号端的信号的控制下，将驱动控制模块的阈值电压储存在稳压模块中。发光控制模块的控制端与发光控制信号端相连，第一输入端与第三参考信号端相连，第二输出端与发光器件的第一端相连，发光器件的第二端与第二参考信号端相连。发光控制模块被配置为在发光控制信号端的信号的控制下，控制驱动控制模块对于发光器件的驱动。
在本发明的实施例中，驱动控制模块包括：驱动晶体管。其中，驱动晶体管，栅极为驱动控制模块的控制端，第一电极为驱动控制模块的输入端，第二电极为驱动控制模块的输出端。
在本发明的实施例中，第一复位模块包括：第一开关晶体管和第二开关晶体管。其中，第一开关晶体管，栅极为第一复位模块的控制端，第一电极为第一复位模块的第一输入端，第二电极为第一复位模块的第一输出端。第二开关晶体管，第一电极为第一复位模块的第二输入端，第二电极为第一复位模块的第二输出端。第一开关晶体管的栅极与第二开关晶体管的栅极相连。
在本发明的实施例中，数据写入模块包括：第三开关晶体管。其中，第三开关晶体管，栅极为数据写入模块的控制端，第一电极为数据写入模块的输入端，第二电极为数据写入模块的输出端。
在本发明的实施例中，补偿模块包括：第四开关晶体管。其中，第四开关晶体管，栅极为补偿模块的控制端，第一电极为补偿模块的输入端，第二电极为补偿模块的输出端。
在本发明的实施例中，稳压模块包括：电容。其中，电容的第一电极为稳压模块的第一端，电容的第二电极为稳压模块的第二端。
在本发明的实施例中，发光控制模块包括，第五开关晶体管和第六开关晶体管。其中，第五开关晶体管，栅极为发光控制模块的控制端，第一电极为发光控制模块的第一输入端，第二电极为发光控制模块的第一输出端。第六开关晶体管，第一电极为发光控制模块的第二输入端，第二电极为发光控制模块的第二输出端。第五开关晶体管的栅极与第六开关晶体管的栅极相连。
在本发明的实施例中，像素电路还包括：第二复位模块。第二复位模块与发光器件连接，第二复位模块被配置为对发光器件进行复位。
在本发明的实施例中，第二复位模块包括控制端、输入端和输出端。第二复位模块的控制端与输入端均与第二复位控制信号端相连，输出端与发光器件的第一端相连。第二复位模块被配置为在第二复位控制信号端的信号的控制下，对发光器件的第一端的电位进行复位。
在本发明的实施例中，第二复位模块包括：第七开关晶体管。其中，第七开关晶体管，栅极为第二复位模块的控制端，第一电极为第二复位模块的输入端，第二电极为第二复位模块的输出端。
在本发明的实施例中，驱动晶体管为P型晶体管。开关晶体管为P型晶体管或为N型晶体管。
在本发明的实施例中，第一参考信号端与第三参考信号端的电压均为高电平电压，第二参考信号端的电压为低电平电压或接地。
根据本发明的第二方面，还提供了一种像素电路的驱动方法，用于驱动上述像素电路，包括：复位阶段：对于第一复位模块提供有效的控制信号。第一复位模块对稳压模块进行复位。写入补偿阶段：对于数据写入模块和补偿模块提供有效的控制信号。数据写入模块将数据信号提供给稳压模块。补偿模块将驱动控制模块的阈值电压储存在稳压模块中。发光阶段：对于发光控制模块提供有效的控制信号。发光控制模块控制驱动控制模块对于发光器件的驱动。驱动控制模块在稳压模块存储的电压的控制下驱动 发光器件发光。
在本发明的实施例中，像素电路包括第二复位模块，第二复位模块与发光器件连接，第二复位模块被配置为对发光器件进行复位。写入补偿阶段还包括：第二复位模块对发光器件进行复位。
根据本发明的第三方面，还提供了一种有机电致发光显示面板，包括上述任一种像素电路。
根据本发明的第四方面，还提供了一种显示装置，包括上述任一种有机电致发光显示面板。
本发明实施例提供的上述像素电路、其驱动方法及相关装置，像素电路包括：第一复位模块、数据写入模块、补偿模块、稳压模块、驱动控制模块、发光控制模块和发光器件。其中，第一复位模块用于在第一复位控制信号端的信号的控制下，对稳压模块的第一端和第二端的电位进行复位。数据写入模块用于在写入控制信号端的信号的控制下，将数据信号端的信号提供给稳压模块的第一端。补偿模块用于在补偿控制信号端的信号的控制下，将驱动控制模块的阈值电压储存在稳压模块中。发光控制模块用于在发光控制信号端的信号的控制下，与稳压模块共同控制驱动控制模块驱动发光器件发光。通过上述各模块的配合工作该像素电路可以补偿驱动控制模块的阈值电压的漂移，因此，在发光显示时，可以使驱动发光器件发光的驱动电流与数据信号的电压有关，与驱动控制模块的阈值电压和第一参考信号端的电压无关，能避免阈值电压和压降(IR Drop)对流过发光器件的电流的影响，从而使驱动发光器件发光的工作电流保持一致，提高了显示装置显示区域图像亮度的均匀性。
附图说明
为了更清楚地说明本发明的实施例的技术方案，下面将对实施例的附图进行简要说明，应当知道，以下描述的附图仅仅涉及本发明的一些实施例，而非对本发明的限制，其中：
图1为现有技术的像素电路的示意性的电路图；
图2为根据本发明第一实施例的像素电路的示意性的结构图；
图3为图2所示的像素电路的一个示意性的电路图；
图4为图2所示的像素电路的另一个示意性的电路图；
图5为根据本发明第二实施例的像素电路的示意性的结构图；
图6为根据本发明第三实施例的像素电路的示意性的结构图；
图7为图6所示的像素电路的一个示意性的电路图；
图8为图6所示的像素电路的另一个示意性的电路图；
图9为图7所示的像素电路的电路时序示意图；
图10为图8所示的像素电路的电路时序示意图；
图11为根据本发明第四实施例的像素电路的驱动方法的示意性的流程图。
具体实施方式
下面结合附图，对本发明实施例提供的像素电路、其驱动方法及相关装置的具体实施方式进行详细地说明。需要说明的是，实施例是为了更好的解释本发明，但不限制本发明。图2为根据本发明第一实施例的像素电路的示意性的结构图。如图2所示，第一实施例的像素电路包括：第一复位模块1、数据写入模块2、补偿模块3、稳压模块4、驱动控制模块5、发光控制模块6和发光器件D。第一复位模块1与稳压模块4连接，第一复位模块1被配置为对稳压模块4进行复位。数据写入模块2与稳压模块4连接，数据写入模块2被配置为将数据信号提供给稳压模块4。补偿模块3与稳压模块4以及驱动控制模块5连接，补偿模块3被配置为将驱动控制模块5的阈值电压储存在稳压模块4中。稳压模块4与驱动控制模块5连接，稳压模块4被配置为存储用于控制驱动控制模块5的电压。驱动控制模块5与发光控制模块6连接，驱动控制模块5被配置为驱动发光器件D。发光控制模块6与驱动控制模块5以及发光器件D连接，发光控制模块6被配置为控制驱动控制模块5对于发光器件D的驱动。发光器件D与 发光控制模块6连接，发光器件D被配置为在驱动控制模块5的驱动下发光。
在本发明的实施例中，第一复位模块1包括控制端、第一输入端、第二输入端、第一输出端和第二输出端。数据写入模块2包括控制端、输入端和输出端。补偿模块3包括控制端、输入端和输出端。稳压模块4包括第一端和第二端。驱动控制模块5包括控制端、输入端和输出端。发光控制模块6包括控制端、第一输入端、第二输入端、第一输出端和第二输出端。发光器件D包括第一端和第二端。其中，第一复位模块1的控制端与第一复位控制信号端Reset1相连，第一输入端分别与驱动控制模块5的输入端和第一参考信号端VDD相连，第二输入端与初始化信号端Vinit相连，第一输出端分别与稳压模块4的第一端、数据写入模块2的输出端和发光控制模块6的第一输出端相连，第二输出端分别与稳压模块4的第二端、驱动控制模块5的控制端和补偿模块3的输出端相连。第一复位模块1被配置为在第一复位控制信号端Reset1的信号的控制下，对稳压模块4的第一端和第二端的电位进行复位。
数据写入模块2的控制端与写入控制信号端Scan1相连，输入端与数据信号端Data相连。数据写入模块2被配置为在写入控制信号端Scan1的信号的控制下，将数据信号端Data的数据信号提供给稳压模块4的第一端。
补偿模块3的控制端与补偿控制信号端Scan2相连，输入端分别与驱动控制模块5的输出端和发光控制模块6的第二输入端相连。补偿模块3被配置为在补偿控制信号端Scan2的信号的控制下，将驱动控制模块5的阈值电压储存在稳压模块4中。
发光控制模块6的控制端与发光控制信号端EM相连，第一输入端与第三参考信号端Vref相连，第二输出端与发光器件D的第一端相连，发光器件D的第二端与第二参考信号端VSS相连。发光控制模块6被配置为在发光控制信号端EM的信号的控制下，控制驱动控制模块5对于发光器件D的驱动。
本发明实施例提供的上述像素电路，包括：第一复位模块、数据写入 模块、补偿模块、稳压模块、驱动控制模块、发光控制模块和发光器件。其中，第一复位模块用于在第一复位控制信号端的信号的控制下，对稳压模块的第一端和第二端的电位进行复位。数据写入模块用于在写入控制信号端的信号的控制下，将数据信号端的信号提供给稳压模块的第一端。补偿模块用于在补偿控制信号端的信号的控制下，将驱动控制模块的阈值电压储存在稳压模块中。发光控制模块用于在发光控制信号端的信号的控制下，与稳压模块共同控制驱动控制模块驱动发光器件发光。通过上述各模块的配合工作该像素电路可以补偿驱动控制模块的阈值电压的漂移，因此，在发光显示时，可以使驱动发光器件发光的驱动电流与数据信号的电压有关，与驱动控制模块的阈值电压和第一参考信号端的电压无关，能避免阈值电压和压降(IR Drop)对流过发光器件的电流的影响，从而使驱动发光器件发光的工作电流保持一致，提高了显示装置显示区域图像亮度的均匀性。图3为图2所示的像素电路的一个示意性的电路图。图4为图2所示的像素电路的另一个示意性的电路图。
在本发明的实施例中，像素电路中的发光器件D可以为有机发光二极管OLED。如图3和4所示，有机发光二极管的阳极为发光器件的第一端，阴极为发光器件的第二端，有机发光二极管在驱动控制模块的饱和电流的作用下实现发光显示。
本发明的实施例中，如图3和图4所示，驱动控制模块5可以包括：驱动晶体管DT。其中，驱动晶体管DT，其栅极为驱动控制模块5的控制端，第一电极为驱动控制模块5的输入端，第二电极为驱动控制模块5的输出端。
在本发明的实施例中，驱动晶体管DT可以为P型晶体管。由于P型晶体管的阈值电压Vth为负值，为了保证驱动晶体管DT能正常工作，对应的第一参考信号端VDD的电压可以为高电平电压，第二参考参考信号端VSS的电压可以是地的电压或为低电平电压。
进一步地，在本发明的实施例中，第三参考信号端Vref的电压可以与第一参考信号端VDD的电压一致，也为高电平电压。
以上仅是举例说明像素电路中驱动控制模块的具体结构，在本发明的实施例中，驱动控制模块的具体结构不限于上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。
在本发明的实施例中，如图3和图4所示，第一复位模块1可以包括：第一开关晶体管T1和第二开关晶体管T2。其中，第一开关晶体管T1，其栅极与第二开关晶体管T2的栅极相连，为第一复位模块1的控制端，第一电极为第一复位模块1的第一输入端，第二电极为第一复位模块1的第一输出端。第二开关晶体管T2，其第一电极为第一复位模块1的第二输入端，第二电极为第一复位模块1的第二输出端。
进一步地，在本发明的实施例中，如图3所示，第一开关晶体管T1和第二开关晶体管T2可以为N型晶体管，此时，当第一复位控制信号端Reset1的电位为高电位时第一开关晶体管T1和第二开关晶体管T2处于导通状态，当第一复位控制信号端Reset1的电位为低电位时第一开关晶体管T1和第二开关晶体管T2处于截止状态。或者，如图4所示，第一开关晶体管T1和第二开关晶体管T2也可以为P型晶体管，此时，当第一复位控制信号端Reset1的电位为低电位时第一开关晶体管T1和第二开关晶体管T2处于导通状态，当第一复位控制信号端Reset1的电位为高电位时第一开关晶体管T1和第二开关晶体管T2处于截止状态。在此不作限定。
具体地，本发明实施例提供的上述像素电路，当第一开关晶体管和第二开关晶体管在第一复位控制信号端的信号的控制下处于导通状态时，第一参考信号端的信号通过导通的第一开关晶体管传输给稳压模块的第一端，初始化信号端的信号通过导通的第二开关晶体管传输给稳压模块的第二端，从而分别对稳压模块的第一端和第二端的电位进行复位。
以上仅是举例说明像素电路中第一复位模块的具体结构，在本发明的实施例中，第一复位模块的具体结构不限于本发明实施例提供的上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。
在本发明的实施例中，如图3和图4所示，数据写入模块2可以包括：第三开关晶体管T3。其中，第三开关晶体管T3，其栅极为数据写入模块2 的控制端，第一电极为数据写入模块2的输入端，第二电极为数据写入模块2的输出端。
进一步地，在本发明的实施例中，如图3所示，第三开关晶体管T3可以为N型晶体管，此时，当写入控制信号端Scan1的电位为高电位时第三开关晶体管T3处于导通状态，当写入控制信号端Scan1的电位为低电位时第三开关晶体管T3处于截止状态。或者，如图4所示，第三开关晶体管T3也可以为P型晶体管，此时，当写入控制信号端Scan1的电位为低电位时第三开关晶体管T3处于导通状态，当写入控制信号端Scan1的电位为高电位时第三开关晶体管T3处于截止状态。在此不作限定。
具体地，本发明实施例提供的上述像素电路，当第三开关晶体管在写入控制信号端的信号的控制下处于导通状态时，数据信号端的信号就通过导通的第三开关晶体管传输给稳压模块的第一端，从而实现数据写入功能。
以上仅是举例说明像素电路中数据写入模块的具体结构，在本发明的实施例中，数据写入模块的具体结构不限于本发明实施例提供的上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。
在本发明的实施例中，如图3和图4所示，补偿模块3可以包括：第四开关晶体管T4。其中，第四开关晶体管T4，其栅极为补偿模块3的控制端，第一电极为补偿模块3的输入端，第二电极为补偿模块3的输出端。
进一步地，在本发明的实施例中，如图3所示，第四开关晶体管T4可以为N型晶体管，此时，当补偿控制信号端Scan2的电位为高电位时第四开关晶体管T4处于导通状态，当补偿控制信号端Scan2的电位为低电位时第四开关晶体管T4处于截止状态。或者，如图4所示，第四开关晶体管T4也可以为P型晶体管，此时，当补偿控制信号端Scan2的电位为低电位时第四开关晶体管T4处于导通状态，当补偿控制信号端Scan2的电位为高电位时第四开关晶体管T4处于截止状态。在此不作限定。
具体地，本发明实施例提供的上述像素电路，当第四开关晶体管在补偿控制信号端的信号的控制下处于导通状态时，第四开关晶体管使驱动晶体管连接为二极管结构，第一参考信号端的信号通过二极管结构的驱动晶 体管传输至稳压模块的第二端，从而将驱动晶体管的阈值电压储存在稳压模块中。
在本发明的实施例中，补偿控制信号端Scan2可以与写入控制信号端Scan1为同一信号端。
以上仅是举例说明像素电路中补偿模块的具体结构，在本发明的实施例中，补偿模块的具体结构不限于本发明实施例提供的上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。
在本发明的实施例中，如图3和图4所示，稳压模块4可以包括：电容C。其中，电容C的第一电极为稳压模块4的第一端，电容C的第二电极为稳压模块4的第二端。
以上仅是举例说明像素电路中稳压模块的具体结构，在本发明的实施例中，稳压模块的具体结构不限于本发明实施例提供的上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。在本发明的实施例中，如图3和图4所示，发光控制模块6可以包括第五开关晶体管T5和第六开关晶体管T6。其中，第五开关晶体管T5，其栅极与第六开关晶体管T6的栅极相连，为发光控制模块6的控制端，第一电极为发光控制模块6的第一输入端，第二电极为发光控制模块6的第一输出端。第六开关晶体管T6，其第一电极为发光控制模块6的第二输入端，第二电极为发光控制模块6的第二输出端。
进一步地，在本发明的实施例中，如图3所示，第五开关晶体管T5和第六开关晶体管T6可以为N型晶体管，此时，当补偿控制信号端Scan2的电位为高电位时第五开关晶体管T5和第六开关晶体管T6处于导通状态，当补偿控制信号端Scan2的电位为低电位时第五开关晶体管T5和第六开关晶体管T6处于截止状态。或者，如图4所示，第五开关晶体管T5和第六开关晶体管T6也可以为P型晶体管，此时，当补偿控制信号端Scan2的电位为低电位时第五开关晶体管T5和第六开关晶体管T6处于导通状态，当补偿控制信号端Scan2的电位为高电位时第五开关晶体管T5和第六开关晶体管T6处于截止状态。在此不作限定。
具体地，本发明实施例提供的上述像素电路，当第五开关晶体管和第六开关晶体管在发光控制信号端的信号的控制下处于导通状态时，导通的第六开关晶体管使驱动控制模块的输出端与发光器件导通，同时第三参考信号端的信号通过导通的第五开关晶体管传输至稳压模块的第一端，与稳压模块共同控制驱动控制模块驱动发光器件发光。
以上仅是举例说明像素电路中补偿模块的具体结构，在本发明的实施例中，补偿模块的具体结构不限于本发明实施例提供的上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。
在本发明的实施例中，第三参考信号端的电压可以与第一参考信号端的电压相等，在此不作限制。
图5为根据本发明第二实施例的像素电路的示意性的结构图。如图5所示，第二实施例的像素电路还包括：第二复位模块7。其中，第二复位模块7的控制端与输入端均与第二复位控制信号端Reset2相连，输出端与发光器件D的第一端相连。第二复位模块7用于在第二复位控制信号端Reset2的控制下，对发光器件D的第一端的电位进行复位，以使在低灰阶下的显示更暗一些，提高对比度。
图6为根据本发明第三实施例的像素电路的示意性的结构图。在本发明的第三实施例中，如图6所示，补偿控制信号端Scan2、写入控制信号端Scan1以及第二复位控制信号端Reset2可以为同一信号端(其中，图6中用写入控制信号端Scan1代替补偿控制信号端Scan2和第二复位控制信号端Reset2)。
图7为图6所示的像素电路的一个示意性的电路图。图8为图6所示的像素电路的另一个示意性的电路图。如图7和图8所示，第二复位模块7可以包括：第七开关晶体管T7。其中，第七开关晶体管T7，其栅极为第二复位模块7的控制端，第一电极为第二复位模块7的输入端，第二电极为第二复位模块7的输出端。
进一步地，在本发明的实施例中，如图7所示，第七开关晶体管T7可以为N型晶体管，此时，当第二复位控制信号端Reset2的电位为高电位 时第七开关晶体管T7处于导通状态，当第二复位控制信号端Reset2的电位为低电位时第七开关晶体管T7处于截止状态。或者，如图4所示，第七开关晶体管T7也可以为P型晶体管，此时，当第二复位控制信号端Reset2的电位为低电位时第七开关晶体管T7处于导通状态，当第二复位控制信号端Reset2的电位为高电位时第七开关晶体管T7处于截止状态。在此不作限定。
具体地，本发明实施例提供的上述像素电路，当第七开关晶体管在第二复位控制信号端的信号的控制下处于导通状态时，第二复位控制信号端的信号通过导通的第七开关晶体管传输至发光器件的第一端，从而对发光器件的第一端的电位进行复位。
以上仅是举例说明像素电路中第二复位模块的具体结构，在本发明的实施例中，第二复位模块的具体结构不限于本发明实施例提供的上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。
需要说明的是本发明上述实施例中提到的驱动晶体管和开关晶体管可以是薄膜晶体管(TFT，Thin Film Transistor)，也可以是金属氧化物半导体场效应管(MOS，Metal Oxide Scmiconductor)，在此不做限定。在具体实施中，这些晶体管的第一电极和第二电极根据晶体管类型以及输入信号的不同，其功能可以互换，在此不做具体区分。
一般地，当晶体管为P型晶体管时，第一电极为源极，第二电极为漏极。当晶体管为N型晶体管时，第一电极为漏极，第二电极为源极。为了简化制作工艺，所有的开关晶体管可以同时都为P型晶体管或都为N型晶体管，在此不作限定。在本发明的实施例中提到的驱动晶体管和开关晶体管可以全部采用P型晶体管设计，这样可以简化像素电路的制作工艺流程。
下面分别以图7和图8所示的像素电路为例对本发明实施例提供的像素电路的工作过程作以描述。为了便于描述，规定电容C的第一端为第一节点A，电容C的第二端为第二节点B。且下述描述中以1表示高电平信号，0表示低电平信号。
首先，以图7所示的像素电路的结构为例对其工作过程作以描述，其 中在图7所示的像素电路中，驱动晶体管DT为P型晶体管，所有开关晶体管均为N型晶体管，各N型晶体管在高电平作用下导通，在低电平作用下截止。
图9为图7所示的像素电路的电路时序示意图。以下，选取如图9所示的输入时序图中的T1、T2和T3三个阶段进行说明。
在T1阶段，Scan1＝0，Reset1＝1，EM＝0。
第一开关晶体管T1和第二开关晶体管T2、处于导通状态，第三开关晶体管T3、第四开关晶体管T4、第五开关晶体管T5、第六开关晶体管T6和第七开关晶体管T7处于截止状态。第一参考信号端VDD的信号通过导通的第一开关晶体管T1传输至第一节点A，初始化信号端Vinit的信号通过导通的第二开关晶体管T2传输至第二节点B，因此，此阶段，第一节点A的电压复位为第一参考信号端VDD的电压，第二节点B的电压复位为初始化信号端Vinit的电压。
在T2阶段，Scan1＝1，Reset1＝0，EM＝0。
第三开关晶体管T3、第四开关晶体管T4和第七开关晶体管T7处于导通状态，第一开关晶体管T1、第二开关晶体管T2、第五开关晶体管T5和第六开关晶体管T6处于截止状态。导通的第四开关晶体管T4使驱动晶体管DT连接为二极管结构，数据信号端Data的信号通过导通的第三开关晶体管T3传输至第一节点A，因此第一电节点A的电压为数据信号端Data的电压Vdata，第一参考信号端VDD的信号通过二极管结构的驱动晶体管DT传输至第二节点B，因此第二节点B的电压为VDD+Vth，其中VDD为第一参考信号端VDD的电压，Vth为驱动晶体管DT的阈值电压。同时，写入控制信号端Scan1的信号通过导通的第七开关晶体管T7传输至发光器件D的第一端。
在T3阶段，Scan1＝0，Reset1＝0，EM＝1。
第五开关晶体管T5和第六开关晶体管T6处于导通状态，第一开关晶体管T1、第二开关晶体管T2、第三开关晶体管T3、第四开关晶体管T4和第七开关晶体管T7处于截止状态。第三参考信号端Vref的信号通过导 通的第一开关晶体管传输至第一节点A，第一节点A的电位由上一阶段的Vdata变为Vref，其中Vref为第三参考信号端Vref的电压，由于电容C的作用，根据电容电量守恒原理，第二节点B的电压由上一阶段的VDD+Vth变为VDD+Vth+Vref-Vdata。因此，在此阶段中，驱动晶体管DT的栅极的电压保持在VDD+Vth+Vref-Vdata，驱动晶体管DT的源极电压为第一参考信号端VDD的电压VDD，驱动晶体管DT工作处于饱和状态，根据饱和状态电流特性可知，流过驱动晶体管DT且用于驱动OLED发光的工作电流IOLED满足公式：IOLED＝K(Vgs–Vth)2＝K(VDD+Vth+Vref-Vdata-VDD–Vth)2＝K(Vref-Vdata)2，其中K为结构参数，晶体管结构不变时此数值相对稳定，可以算作常量。从而可以看出有机发光二极管OLED的工作电流IOLED已经不受驱动晶体管DT的阈值电压Vth的影响，且和第一参考信号端VDD的电压VDD无关，仅与数据信号端Data的电压Vdata和第三参考信号端Verf的电压Vref有关，彻底解决了由于工艺制程以及长时间的操作造成的驱动晶体管DT的阈值电压Vth漂移以及压降(IR Drop)对有机发光二极管OLED的工作电流IOLED造成的影响，从而改善了面板显示的不均匀性。
然后，以图8所示的像素电路的结构为例对其工作过程作以描述，其中在图8所示的像素电路中，驱动晶体管DT和所有开关晶体管均为P型晶体管，各P型晶体管在低电平作用下导通，在高电平作用下截止。图10为图8所示的像素电路的电路时序示意图。以下，选取如图10所示的输入时序图中的T1、T2和T3三个阶段。
在T1阶段，Scan1＝1，Reset1＝0，EM＝1。
第一开关晶体管T1和第二开关晶体管T2、处于导通状态，第三开关晶体管T3、第四开关晶体管T4、第五开关晶体管T5、第六开关晶体管T6和第七开关晶体管T7处于截止状态。第一参考信号端VDD的信号通过导通的第一开关晶体管T1传输至第一节点A，初始化信号端Vinit的信号通过导通的第二开关晶体管T2传输至第二节点B，因此，此阶段，第一节点A的电压复位为第一参考信号端VDD的电压，第二节点B的电压复位为初始化信号端Vinit的电压。
在T2阶段，Scan1＝0，Reset1＝1，EM＝1。
第三开关晶体管T3、第四开关晶体管T4和第七开关晶体管T7处于导通状态，第一开关晶体管T1、第二开关晶体管T2、第五开关晶体管T5和第六开关晶体管T6处于截止状态。导通的第四开关晶体管T4使驱动晶体管DT连接为二极管结构，数据信号端Data的信号通过导通的第三开关晶体管T3传输至第一节点A，因此第一电节点A的电压为数据信号端Data的电压Vdata，第一参考信号端VDD的信号通过二极管结构的驱动晶体管DT传输至第二节点B，因此第二节点B的电压为VDD+Vth，其中VDD为第一参考信号端VDD的电压，Vth为驱动晶体管DT的阈值电压。同时写入控制信号端Scan1的信号通过导通的第七开关晶体管T7传输至发光器件D的第一端。
在T3阶段，Scan1＝1，Reset1＝1，EM＝0。
第五开关晶体管T5和第六开关晶体管T6处于导通状态，第一开关晶体管T1、第二开关晶体管T2、第三开关晶体管T3、第四开关晶体管T4和第七开关晶体管T7处于截止状态。第三参考信号端Vref的信号通过导通的第一开关晶体管传输至第一节点A，第一节点A的电位由上一阶段的Vdata变为Vref，其中Vref为第三参考信号端Vref的电压，由于电容C的作用，根据电容电量守恒原理，第二节点B的电压由上一阶段的VDD+Vth变为VDD+Vth+Vref-Vdata。因此，在此阶段中，驱动晶体管DT的栅极的电压保持在VDD+Vth+Vref-Vdata，驱动晶体管DT的源极电压为第一参考信号端VDD的电压VDD，驱动晶体管DT工作处于饱和状态，根据饱和状态电流特性可知，流过驱动晶体管DT且用于驱动OLED发光的工作电流IOLED满足公式：IOLED＝K(Vgs–Vth)2＝K(VDD+Vth+Vref-Vdata-VDD–Vth)2＝K(Vref-Vdata)2，其中K为结构参数，相同结构中此数值相对稳定，可以算作常量。从而可以看出有机发光二极管OLED的工作电流IOLED已经不受驱动晶体管DT的阈值电压Vth的影响，且和第一参考信号端VDD的电压VDD无关，仅与数据信号端Data的电压Vdata和第三参考信号端Verf的电压Vref有关，彻底解决了由于工艺制程以及长时间的操作造成的驱动晶体管DT的阈值电压 Vth1漂移以及压降(IR Drop)对有机发光二极管OLED的工作电流IOLED造成的影响，从而改善了面板显示的不均匀性。
本发明第四实施例还提供了一种像素电路的驱动方法，用于驱动上述任一种像素电路，包括：复位阶段：对于第一复位模块提供有效的控制信号。第一复位模块对稳压模块进行复位。写入补偿阶段：对于数据写入模块和补偿模块提供有效的控制信号。数据写入模块将数据信号提供给稳压模块。补偿模块将驱动控制模块的阈值电压储存在稳压模块中。发光阶段：对于发光控制模块提供有效的控制信号。发光控制模块控制驱动控制模块对于发光器件的驱动。驱动控制模块在稳压模块存储的电压的控制下驱动发光器件发光。
图11为根据本发明第四实施例的像素电路的驱动方法的示意性的流程图。如图11所示，在复位阶段S701中，第一复位模块在第一复位控制信号端的信号的控制下，对稳压模块的第一端和第二端的电位进行复位。在写入补偿阶段S702中，数据写入模块用于在写入控制信号端的信号的控制下，将数据信号端的信号提供给稳压模块的第一端。所补偿模块在补偿控制信号端的信号的控制下，将驱动控制模块的阈值电压储存在稳压模块中。在发光阶段S703中，发光控制模块在发光控制信号端的信号的控制下，与稳压模块共同控制驱动控制模块驱动发光器件发光。
在本发明的实施例中，当像素电路中包括第二复位模块时，在写入补偿阶段还包括：第二复位模块在第二复位控制信号端的信号的控制下，对发光器件的第一端的电位进行复位。
根据本发明的第五实施例，还提供了一种有机电致发光显示面板，包括上述任一种像素电路。由于该有机电致发光显示面板解决问题的原理与前述像素电路相似，因此该有机电致发光显示面板中的像素电路的实施可以参见前述实例中像素电路的实施，重复之处不再赘述。
根据本发明的第六实施例，还提供了一种显示装置，包括上述有机电致发光显示面板。该显示装置可以是显示器、手机、电视、笔记本、一体机等，对于显示装置的其它必不可少的组成部分均为本领域的普通技术人 员应该理解具有的，在此不做赘述，也不应作为对本发明的限制。
本发明实施例提供的上述像素电路、其驱动方法及相关装置，包括：第一复位模块、数据写入模块、补偿模块、稳压模块、驱动控制模块、发光控制模块和发光器件。其中，第一复位模块用于在第一复位控制信号端的信号的控制下，对稳压模块的第一端和第二端的电位进行复位。数据写入模块用于在写入控制信号端的信号的控制下，将数据信号端的信号提供给稳压模块的第一端。补偿模块用于在补偿控制信号端的信号的控制下，将驱动控制模块的阈值电压储存在稳压模块中。发光控制模块用于在发光控制信号端的信号的控制下，与稳压模块共同控制驱动控制模块驱动发光器件发光。通过上述各模块的配合工作该像素电路可以补偿驱动控制模块的阈值电压的漂移，因此，在发光显示时，可以使驱动发光器件发光的驱动电流与数据信号的电压有关，与驱动控制模块的阈值电压和第一参考信号端的电压无关，能避免阈值电压和压降(IR Drop)对流过发光器件的电流的影响，从而使驱动发光器件发光的工作电流保持一致，提高了显示装置显示区域图像亮度的均匀性。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (19)

  1. 一种像素电路，包括：第一复位模块、数据写入模块、补偿模块、稳压模块、驱动控制模块、发光控制模块和发光器件；其中，
    所述第一复位模块与所述稳压模块连接，所述第一复位模块被配置为对所述稳压模块进行复位；
    所述数据写入模块与所述稳压模块连接，所述数据写入模块被配置为将数据信号提供给所述稳压模块；
    所述补偿模块与所述稳压模块以及所述驱动控制模块连接，所述补偿模块被配置为将所述驱动控制模块的阈值电压储存在所述稳压模块中；
    所述稳压模块与所述驱动控制模块连接，所述稳压模块被配置为存储用于控制驱动控制模块的电压；
    所述驱动控制模块与所述发光控制模块连接，所述驱动控制模块被配置为驱动发光器件；
    所述发光控制模块与所述驱动控制模块以及所述发光器件连接，所述发光控制模块被配置为控制所述驱动控制模块对于所述发光器件的驱动；
    所述发光器件与所述发光控制模块连接，所述发光器件被配置为在所述驱动控制模块的驱动下发光。
  2. 如权利要求1所述的像素电路，其中，
    所述第一复位模块包括控制端、第一输入端、第二输入端、第一输出端和第二输出端；
    所述数据写入模块包括控制端、输入端和输出端；
    所述补偿模块包括控制端、输入端和输出端；
    所述稳压模块包括第一端和第二端；
    所述驱动控制模块包括控制端、输入端和输出端；
    所述发光控制模块包括控制端、第一输入端、第二输入端、第一输出端和第二输出端；
    所述发光器件包括第一端和第二端；
    所述第一复位模块的控制端与第一复位控制信号端相连，第一输入端 分别与所述驱动控制模块的输入端和第一参考信号端相连，第二输入端与初始化信号端相连，第一输出端分别与所述稳压模块的第一端、所述数据写入模块的输出端和所述发光控制模块的第一输出端相连，第二输出端分别与所述稳压模块的第二端、所述驱动控制模块的控制端和所述补偿模块的输出端相连；所述第一复位模块被配置为在所述第一复位控制信号端的信号的控制下，对所述稳压模块的第一端和第二端的电位进行复位；
    所述数据写入模块的控制端与写入控制信号端相连，输入端与数据信号端相连；所述数据写入模块被配置为在所述写入控制信号端的信号的控制下，将所述数据信号端的数据信号提供给所述稳压模块的第一端；
    所述补偿模块的控制端与补偿控制信号端相连，输入端分别与所述驱动控制模块的输出端和所述发光控制模块的第二输入端相连；所述补偿模块被配置为在所述补偿控制信号端的信号的控制下，将所述驱动控制模块的阈值电压储存在所述稳压模块中；
    所述发光控制模块的控制端与发光控制信号端相连，第一输入端与第三参考信号端相连，第二输出端与所述发光器件的第一端相连；所述发光器件的第二端与第二参考信号端相连；所述发光控制模块被配置为在所述发光控制信号端的信号的控制下，控制所述驱动控制模块对于所述发光器件的驱动。
  3. 如权利要求2所述的像素电路，所述驱动控制模块，包括：驱动晶体管；其中，
    所述驱动晶体管，栅极为所述驱动控制模块的控制端，第一电极为所述驱动控制模块的输入端，第二电极为所述驱动控制模块的输出端。
  4. 如权利要求2所述的像素电路，所述第一复位模块，包括：第一开关晶体管和第二开关晶体管；其中，
    所述第一开关晶体管，栅极为所述第一复位模块的控制端，第一电极为所述第一复位模块的第一输入端，第二电极为所述第一复位模块的第一输出端；
    所述第二开关晶体管，第一电极为所述第一复位模块的第二输入端， 第二电极为所述第一复位模块的第二输出端；
    所述第一开关晶体管的栅极与所述第二开关晶体管的栅极相连。
  5. 如权利要求2所述的像素电路，所述数据写入模块，包括：第三开关晶体管；其中，
    所述第三开关晶体管，栅极为所述数据写入模块的控制端，第一电极为所述数据写入模块的输入端，第二电极为所述数据写入模块的输出端。
  6. 如权利要求2所述的像素电路，所述补偿模块，包括：第四开关晶体管；其中，
    所述第四开关晶体管，栅极为所述补偿模块的控制端，第一电极为所述补偿模块的输入端，第二电极为所述补偿模块的输出端。
  7. 如权利要求2所述的像素电路，所述稳压模块，包括：电容；其中，
    所述电容的第一电极为所述稳压模块的第一端，所述电容的第二电极为所述稳压模块的第二端。
  8. 如权利要求2所述的像素电路，所述发光控制模块，包括，第五开关晶体管和第六开关晶体管；其中，
    所述第五开关晶体管，栅极为所述发光控制模块的控制端，第一电极为所述发光控制模块的第一输入端，第二电极为所述发光控制模块的第一输出端；
    所述第六开关晶体管，第一电极为所述发光控制模块的第二输入端，第二电极为所述发光控制模块的第二输出端；
    所述第五开关晶体管的栅极与所述第六开关晶体管的栅极相连。
  9. 如权利要求1所述的像素电路，还包括：第二复位模块；
    所述第二复位模块与所述发光器件连接，所述第二复位模块被配置为对所述发光器件进行复位。
  10. 如权利要求2所述的像素电路，还包括：第二复位模块；其中，
    所述第二复位模块包括控制端、输入端和输出端；
    所述第二复位模块的控制端与输入端均与第二复位控制信号端相连，输出端与所述发光器件的第一端相连；
    所述第二复位模块被配置为在所述第二复位控制信号端的信号的控制下，对所述发光器件的第一端的电位进行复位。
  11. 如权利要求10所述的像素电路，所述第二复位模块，包括：第七开关晶体管；其中，
    所述第七开关晶体管，其栅极为所述第二复位模块的控制端，第一电极为所述第二复位模块的输入端，第二电极为所述第二复位模块的输出端。
  12. 如权利要求3所述的像素电路，所述驱动晶体管为P型晶体管。
  13. 如权利要求4至8中任一项所述的像素电路，所述开关晶体管为P型晶体管或为N型晶体管。
  14. 如权利要求11所述的像素电路，所述开关晶体管为P型晶体管或N型晶体管。
  15. 如权利要求2所述的像素电路，所述第一参考信号端与所述第三参考信号端的电压均为高电平电压，所述第二参考信号端的电压为低电平电压或接地。
  16. 一种像素电路的驱动方法，用于驱动如权利要求1所述的像素电路，包括：
    复位阶段：对于所述第一复位模块提供有效的控制信号；所述第一复位模块对所述稳压模块进行复位；
    写入补偿阶段：对于所述数据写入模块和所述补偿模块提供有效的控制信号；所述数据写入模块将数据信号提供给所述稳压模块；所述补偿模块将所述驱动控制模块的阈值电压储存在所述稳压模块中；
    发光阶段：对于所述发光控制模块提供有效的控制信号；所述发光控制模块控制所述驱动控制模块对于所述发光器件的驱动；所述驱动控制模块在所述稳压模块存储的电压的控制下驱动所述发光器件发光。
  17. 如权利要求16所述的驱动方法，所述像素电路包括所述第二复位模块，所述第二复位模块与所述发光器件连接，所述第二复位模块被配置为对所述发光器件进行复位；
    写入补偿阶段还包括：对于所述第二复位模块提供有效的控制信号； 所述第二复位模块对所述发光器件进行复位。
  18. 一种有机电致发光显示面板，包括如权利要求1-15任一项所述的像素电路。
  19. 一种显示装置，包括如权利要求18所述的有机电致发光显示面板。
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Families Citing this family (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105185305A (zh) 2015-09-10 2015-12-23 京东方科技集团股份有限公司 一种像素电路、其驱动方法及相关装置
CN105489168B (zh) * 2016-01-04 2018-08-07 京东方科技集团股份有限公司 像素驱动电路、像素驱动方法和显示装置
CN105427800B (zh) * 2016-01-06 2018-06-12 京东方科技集团股份有限公司 像素电路、驱动方法、有机电致发光显示面板及显示装置
CN105632403B (zh) 2016-01-15 2019-01-29 京东方科技集团股份有限公司 一种像素电路、驱动方法、显示面板及显示装置
CN105575328B (zh) * 2016-03-01 2018-03-06 京东方科技集团股份有限公司 移位寄存器单元、栅极驱动电路和显示装置
CN107492351B (zh) * 2016-06-13 2019-12-10 上海和辉光电有限公司 显示装置、像素驱动电路及其驱动方法
WO2018090620A1 (zh) * 2016-11-18 2018-05-24 京东方科技集团股份有限公司 像素电路、显示面板、显示设备及驱动方法
CN106409233B (zh) * 2016-11-28 2019-08-06 上海天马有机发光显示技术有限公司 一种像素电路、其驱动方法及有机发光显示面板
CN108269534B (zh) * 2017-01-03 2020-06-23 昆山国显光电有限公司 Amoled显示装置及其驱动方法
CN106558287B (zh) * 2017-01-25 2019-05-07 上海天马有机发光显示技术有限公司 有机发光像素驱动电路、驱动方法及有机发光显示面板
CN107068057B (zh) * 2017-02-14 2019-05-03 京东方科技集团股份有限公司 一种像素驱动电路、其驱动方法及显示面板
CN106782339A (zh) * 2017-02-28 2017-05-31 京东方科技集团股份有限公司 一种像素驱动电路及其驱动方法、显示装置
CN106652903B (zh) * 2017-03-03 2018-10-23 京东方科技集团股份有限公司 一种oled像素电路及其驱动方法、显示装置
CN108630141B (zh) * 2017-03-17 2019-11-22 京东方科技集团股份有限公司 像素电路、显示面板及其驱动方法
CN106991964A (zh) * 2017-04-14 2017-07-28 京东方科技集团股份有限公司 像素电路及其驱动方法、显示装置
KR102353894B1 (ko) * 2017-04-19 2022-01-21 삼성디스플레이 주식회사 유기발광 표시장치
CN106910468B (zh) * 2017-04-28 2019-05-10 上海天马有机发光显示技术有限公司 显示面板、显示装置及像素电路的驱动方法
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CN110010072A (zh) * 2018-01-05 2019-07-12 京东方科技集团股份有限公司 像素电路及其驱动方法、显示装置
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CN108492770B (zh) * 2018-03-27 2021-01-22 京东方科技集团股份有限公司 一种像素补偿电路、其驱动方法及显示面板、显示装置
CN108399888B (zh) * 2018-05-29 2020-03-20 京东方科技集团股份有限公司 像素驱动电路及其驱动方法、像素电路和显示面板
CN108735155A (zh) * 2018-06-01 2018-11-02 京东方科技集团股份有限公司 一种像素电路、其驱动方法及显示面板、显示装置
CN108806596A (zh) * 2018-06-26 2018-11-13 京东方科技集团股份有限公司 像素驱动电路及方法、显示装置
US10522083B1 (en) 2018-07-27 2019-12-31 Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Organic light-emitting diode (OLED) driving circuit and active-matrix organic light-emitting diode (AMOLED) display panel
CN108877672B (zh) * 2018-07-27 2021-03-02 武汉华星光电半导体显示技术有限公司 Oled驱动电路及amoled显示面板
US20200202783A1 (en) * 2018-12-21 2020-06-25 Int Tech Co., Ltd. Pixel compensation circuit
CN109493795B (zh) * 2019-01-25 2022-07-05 鄂尔多斯市源盛光电有限责任公司 像素电路、像素驱动方法和显示装置
CN109584795A (zh) * 2019-01-29 2019-04-05 京东方科技集团股份有限公司 像素驱动电路、像素驱动方法和显示装置
TWI695363B (zh) * 2019-03-26 2020-06-01 友達光電股份有限公司 畫素電路
CN109872682A (zh) * 2019-03-28 2019-06-11 武汉华星光电半导体显示技术有限公司 像素补偿电路及显示装置
CN110232889B (zh) * 2019-05-09 2021-07-06 深圳市华星光电半导体显示技术有限公司 像素驱动电路以及显示面板
CN110164378B (zh) * 2019-05-09 2021-11-30 南华大学 Amoled像素电路及其驱动方法
CN109979394A (zh) * 2019-05-17 2019-07-05 京东方科技集团股份有限公司 像素电路及其驱动方法、阵列基板及显示装置
US11727868B2 (en) * 2019-06-03 2023-08-15 Boe Technology Group Co., Ltd. Pixel circuit for threshold compensation, driving method thereof and display device for providing signals
CN110619851A (zh) * 2019-09-24 2019-12-27 京东方科技集团股份有限公司 像素电路、驱动方法及显示装置
CN110738964A (zh) * 2019-10-29 2020-01-31 京东方科技集团股份有限公司 像素电路及显示装置
CN110992884B (zh) * 2019-12-24 2021-07-09 武汉天马微电子有限公司 一种显示面板、显示装置和显示面板的侦测补偿方法
CN110942743B (zh) * 2019-12-26 2021-04-13 云谷（固安）科技有限公司 像素电路的驱动方法、显示面板和显示装置
CN111243479B (zh) 2020-01-16 2024-05-14 京东方科技集团股份有限公司 显示面板、像素电路及其驱动方法
CN111445858A (zh) * 2020-04-20 2020-07-24 昆山国显光电有限公司 像素电路及其驱动方法、显示装置
CN111627394B (zh) * 2020-06-30 2021-10-22 京东方科技集团股份有限公司 一种控制电路及其驱动方法、显示装置
CN112863436B (zh) * 2021-01-11 2022-06-10 京东方科技集团股份有限公司 一种像素电路、驱动方法、电致发光显示面板及显示装置
CN112863428B (zh) * 2021-01-25 2022-07-01 京东方科技集团股份有限公司 像素电路及驱动方法、显示面板、显示装置
CN114792510B (zh) * 2021-01-26 2023-10-31 京东方科技集团股份有限公司 驱动电路、驱动控制方法和显示面板
WO2022160125A1 (zh) * 2021-01-27 2022-08-04 京东方科技集团股份有限公司 像素驱动电路及其驱动方法、显示基板、显示装置
US20240144873A1 (en) * 2021-05-20 2024-05-02 Chengdu Boe Optoelectronics Technology Co., Ltd. Pixel circuit and driving method thereof, display substrate and display device
TWI765771B (zh) * 2021-07-06 2022-05-21 友達光電股份有限公司 自補償之畫素電路與顯示面板
EP4295347A1 (en) * 2021-12-02 2023-12-27 Google LLC Display device with hardware that dims pixels
TWI799054B (zh) * 2022-01-03 2023-04-11 友達光電股份有限公司 用於驅動發光二極體之驅動電路
CN115101004A (zh) * 2022-06-30 2022-09-23 厦门天马微电子有限公司 一种像素驱动电路及其驱动方法、发光面板、显示装置
CN115410530B (zh) * 2022-08-30 2023-07-18 惠科股份有限公司 像素补偿电路、驱动方法和显示面板

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100045578A (ko) * 2008-10-24 2010-05-04 엘지디스플레이 주식회사 유기전계 발광 디스플레이 장치
CN103839513A (zh) * 2012-11-27 2014-06-04 乐金显示有限公司 有机发光二极管显示设备及其驱动方法
US20140168180A1 (en) * 2012-12-13 2014-06-19 Samsung Display Co., Ltd. Pixel and organic light emitting display device using the same
CN203882588U (zh) * 2014-06-13 2014-10-15 京东方科技集团股份有限公司 像素驱动电路、阵列基板及显示装置
CN104157240A (zh) * 2014-07-22 2014-11-19 京东方科技集团股份有限公司 像素驱动电路、驱动方法、阵列基板及显示装置
CN104575389A (zh) * 2015-01-29 2015-04-29 京东方科技集团股份有限公司 像素电路及其驱动方法、显示面板及显示装置
CN105185305A (zh) * 2015-09-10 2015-12-23 京东方科技集团股份有限公司 一种像素电路、其驱动方法及相关装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030038522A (ko) 2001-11-09 2003-05-16 산요 덴키 가부시키가이샤 광학 소자의 휘도 데이터를 초기화하는 기능을 갖는 표시장치
JP5224241B2 (ja) 2007-11-06 2013-07-03 Ｎｌｔテクノロジー株式会社 双方向シフトレジスタ、それを用いた表示装置
KR20100009219A (ko) 2008-07-18 2010-01-27 삼성모바일디스플레이주식회사 화소 및 이를 이용한 유기전계발광 표시장치
KR101135534B1 (ko) * 2010-02-10 2012-04-13 삼성모바일디스플레이주식회사 화소, 이를 이용한 표시 장치, 및 그들의 구동 방법
KR20140050361A (ko) * 2012-10-19 2014-04-29 삼성디스플레이 주식회사 화소, 이를 이용한 입체 영상 표시 장치 및 그의 구동 방법
CN103280182B (zh) 2013-05-29 2015-04-15 中国科学院上海高等研究院 Amoled阈值电压的补偿方法及补偿电路
TWI556210B (zh) * 2014-11-26 2016-11-01 鴻海精密工業股份有限公司 畫素單元及其驅動方法
KR102320311B1 (ko) * 2014-12-02 2021-11-02 삼성디스플레이 주식회사 유기 발광 표시 장치 및 이의 구동 방법
CN104575419B (zh) 2014-12-04 2017-03-15 上海天马微电子有限公司 一种移位寄存器及其驱动方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100045578A (ko) * 2008-10-24 2010-05-04 엘지디스플레이 주식회사 유기전계 발광 디스플레이 장치
CN103839513A (zh) * 2012-11-27 2014-06-04 乐金显示有限公司 有机发光二极管显示设备及其驱动方法
US20140168180A1 (en) * 2012-12-13 2014-06-19 Samsung Display Co., Ltd. Pixel and organic light emitting display device using the same
CN203882588U (zh) * 2014-06-13 2014-10-15 京东方科技集团股份有限公司 像素驱动电路、阵列基板及显示装置
CN104157240A (zh) * 2014-07-22 2014-11-19 京东方科技集团股份有限公司 像素驱动电路、驱动方法、阵列基板及显示装置
CN104575389A (zh) * 2015-01-29 2015-04-29 京东方科技集团股份有限公司 像素电路及其驱动方法、显示面板及显示装置
CN105185305A (zh) * 2015-09-10 2015-12-23 京东方科技集团股份有限公司 一种像素电路、其驱动方法及相关装置

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