WO2018223702A1 - 显示面板、像素的补偿电路和补偿方法 - Google Patents

显示面板、像素的补偿电路和补偿方法 Download PDF

Info

Publication number
WO2018223702A1
WO2018223702A1 PCT/CN2018/073007 CN2018073007W WO2018223702A1 WO 2018223702 A1 WO2018223702 A1 WO 2018223702A1 CN 2018073007 W CN2018073007 W CN 2018073007W WO 2018223702 A1 WO2018223702 A1 WO 2018223702A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
compensation
voltage
sub
mobility
Prior art date
Application number
PCT/CN2018/073007
Other languages
English (en)
French (fr)
Inventor
李永谦
徐攀
李全虎
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/096,796 priority Critical patent/US10762844B2/en
Priority to EP18814097.4A priority patent/EP3637400A4/en
Priority to JP2019544901A priority patent/JP2020522724A/ja
Publication of WO2018223702A1 publication Critical patent/WO2018223702A1/zh

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects
    • 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
    • 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 disclosure relates to the field of display control technologies, and in particular, to a pixel compensation circuit, a display panel, and a pixel compensation method.
  • OLED Organic Light-Emitting Diode
  • pixel driving circuits using two or three switching tubes are mostly driven by a variable power supply.
  • driving circuits may not adopt this driving method, they need to be increased.
  • the number of capacitors which will undoubtedly bring great difficulties to the design of high pixel counts.
  • some drive circuits include a grounding design of the switch tube, and it is difficult to implement an effective pixel compensation technique.
  • the compensation circuit of the pixel includes a driving sub-circuit, a compensation sub-circuit, a first switching sub-circuit, and a second switching sub-circuit.
  • the control end of the driving sub-circuit is electrically connected to the first end of the second switch sub-circuit, the first end is electrically connected to the light-emitting element, and the second end is electrically connected to the power source;
  • the first end of the compensating sub-circuit is The first end of the driving sub-circuit is electrically connected, the second end is electrically connected to the control end of the driving sub-circuit;
  • the control end of the first switching sub-circuit is electrically connected to the first signal input end, the first end is The first end of the driving sub-circuit is electrically connected, the second end is electrically connected to the initial voltage input end, and the control end of the second switching sub-circuit is electrically connected to the second signal input end, the first end and the driving sub-circuit
  • the control terminal is
  • the pixel compensation circuit of the embodiment of the present invention by applying a circuit structure having two switch sub-circuits and a compensation sub-circuit, combined with the relevant control strategy, the current of the pixel in the light-emitting phase is not affected by the threshold voltage Vth, and thus Compensate for changes in Vth.
  • the first switch sub-circuit in the reset phase, is in an on state under the control of the first signal input, and the second switch sub-circuit is under the control of the second signal input
  • the preset time is in an open state; in the compensation phase, the first switch sub-circuit is in a closed state under the control of the first signal input end, and the second switch sub-circuit is under the control of the second signal input end It is turned on within the preset time.
  • the first switch sub-circuit in the write data phase, is in a closed state under the control of the first signal input terminal, and the second switch sub-circuit is under the control of the second signal input end An open state; in the light emitting phase, the first switch sub-circuit is in a closed state under the control of the first signal input end, and the second switch sub-circuit is in a closed state under the control of the second signal input end.
  • the duration of the reset phase is less than the duration of the compensation phase, and the duration of the write data phase is less than the duration of the reset phase.
  • the second switch subcircuit is configured to receive a compensated data voltage from the data signal input, wherein the compensated data voltage is based on a threshold voltage of the driver subcircuit and The mobility is determined.
  • the driver subcircuit includes a drive transistor
  • the compensation subcircuit includes a compensation capacitor
  • the first switch subcircuit includes a first switching transistor
  • the second switch subcircuit includes a second switching transistor
  • a display panel proposed by the embodiment of the second aspect of the present disclosure includes a compensation circuit for a pixel proposed by the embodiment of the first aspect of the present disclosure.
  • the display panel further includes a controller.
  • the controller is configured to: detect, by the first switch sub-circuit, a current threshold voltage and a current mobility of the driving sub-circuit; generate a threshold compensation voltage according to a current threshold voltage of the driving sub-circuit and a current mobility a first mobility compensation voltage; when the threshold compensation voltage is greater than a first predetermined threshold, generating a total compensation voltage according to the threshold compensation voltage and the first mobility compensation voltage; and inputting the input according to the total compensation voltage The data voltage of the compensation circuit is compensated.
  • the controller is further configured to generate a second mobility compensation voltage according to the current threshold voltage and the changed mobility when the mobility of the driving sub-circuit changes, and When the voltage difference between the first mobility compensation voltage and the second mobility compensation voltage is greater than a second predetermined threshold, the total compensation voltage is updated according to the second mobility compensation voltage.
  • the controller is further configured to: acquire a power-off threshold voltage and a power-off mobility of the driving sub-circuit when the pixel power-off stops emitting light, and store the power-off through a memory
  • the threshold voltage and the power-off mobility are such that the power-off threshold voltage and the power-off mobility stored by the memory are used as an initial threshold voltage and an initial mobility, respectively, after the pixel is powered up again.
  • the method includes: controlling, in a resetting phase, the first switch sub-circuit to be turned on, and controlling the second switch sub-circuit to be turned on for a preset time; in the compensating phase, controlling the first switch sub-circuit to be turned off, and controlling The second switch sub-circuit is turned on for a preset time.
  • the method further includes: controlling, in a write data phase, the first switch sub-circuit to be turned off, and controlling the second switch sub-circuit to be turned on; and in the illuminating phase, controlling the first switch sub-circuit And the second switch subcircuit is turned off.
  • the duration of the reset phase is less than the duration of the compensation phase, and the duration of the write data phase is less than the duration of the reset phase.
  • the fourth aspect of the present disclosure proposes a method of performing pixel compensation by the display panel according to the second aspect of the present disclosure.
  • the method includes: detecting a current threshold voltage and a current mobility of the driving sub-circuit; generating a threshold compensation voltage and a first mobility compensation voltage according to a current threshold voltage of the driving sub-circuit and a current mobility; when the threshold When the compensation voltage is greater than the first preset threshold, the total compensation voltage is generated according to the threshold compensation voltage and the first mobility compensation voltage; and the data voltage input by the data signal input terminal is compensated according to the total compensation voltage.
  • the method further includes: generating a second mobility compensation voltage according to the current threshold voltage and the changed mobility when the mobility of the driving sub-circuit changes; determining the first migration Whether the voltage difference between the rate compensation voltage and the second mobility compensation voltage is greater than a second predetermined threshold; if greater than the second predetermined threshold, performing the total compensation voltage according to the second mobility compensation voltage Update.
  • the method further includes: when the pixel is powered off to stop emitting light, acquiring a power-off threshold voltage and a power-off mobility of the driving sub-circuit, and passing the power-off threshold voltage and the The stated electromigration rate is stored to store the stored power-off threshold voltage and the power-off mobility as an initial threshold voltage and an initial mobility, respectively, after the pixel is powered up again.
  • FIG. 1A is a schematic diagram of a compensation circuit of a pixel according to an embodiment of the present disclosure
  • FIG. 1B is a detailed schematic diagram of a compensation circuit of a pixel according to an embodiment of the present disclosure
  • FIG. 2 is a timing diagram of a compensation circuit input signal of a pixel in accordance with an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram showing a state of a compensation circuit of a pixel in a reset phase according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram showing a state of a compensation circuit of a pixel in a compensation phase according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram showing a state of a compensation circuit of a pixel in a stage of writing data according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram showing a state of a compensation circuit of a pixel in an emission phase according to an embodiment of the present disclosure
  • FIG. 7 is a block schematic diagram of a display panel in accordance with an embodiment of the present disclosure.
  • FIG. 8 is a flowchart of a method of compensating a pixel according to an embodiment of the present disclosure
  • FIG. 9 is a flowchart of a method of compensating a pixel according to another embodiment of the present disclosure.
  • FIG. 10 is a flowchart of a method of compensating a pixel according to still another embodiment of the present disclosure.
  • a compensation circuit, a display panel, and a compensation method of a pixel according to an embodiment of the present disclosure will be described below with reference to the accompanying drawings.
  • the pixels of the embodiments of the present disclosure may be OLED pixels or QLED (Quantum Dot Light Emitting Diodes) pixels, etc., and OLED pixels are taken as an example for description below.
  • the compensation circuit of the pixel proposed by the embodiment of the present disclosure includes a driving sub-circuit 110, a compensation sub-circuit 120, a first switching sub-circuit 130, and a second switching sub-circuit 140.
  • control end of the driving sub-circuit 110 is electrically connected to the first end of the second switch sub-circuit 140, the first end is electrically connected to the light-emitting element, and the second end is electrically connected to the power source VDD.
  • the light emitting element may be an OLED or a QLED unit or the like.
  • an OLED is taken as an example of a light-emitting element.
  • the first end of the compensation sub-circuit 120 is electrically connected to the first end of the driving sub-circuit 110, and the second end is electrically connected to the control end of the driving sub-circuit 110.
  • the control end of the first switch sub-circuit 130 is electrically connected to the first signal input terminal G2, the first end is electrically connected to the first end of the driving sub-circuit 110, and the second end is electrically connected to the initial voltage input terminal Vinitial.
  • the control end of the second switch sub-circuit 140 is electrically connected to the second signal input terminal Scan, the first end is electrically connected to the control end of the driving sub-circuit 110, and the second end is electrically connected to the data signal input end Data.
  • the driving sub-circuit 110 may include a driving tube DrT
  • the compensation sub-circuit 120 may include a compensation capacitor Cst
  • the first switching sub-circuit 130 may include a first switching tube T1
  • the sub-circuit 140 may include a second switching transistor T2.
  • the driving transistor DrT has a gate, a source, and a drain, wherein the gate corresponds to a control terminal that drives the DrT, and the source corresponds to one of the first end and the second end of the driving DrT.
  • the drain corresponds to the other of the first end and the second end of the driving DrT (hereinafter, described by driving the control terminal, the first end and the second end of the DrT), wherein the second of the driving tube DrT
  • the terminal is electrically connected to the power source to input the power voltage VDD through the second end of the driving tube DrT, and the first end of the driving tube DrT is electrically connected to the anode of the OLED to provide a driving current for the OLED.
  • the first end of the compensation capacitor Cst is electrically connected to the first end of the driving tube DrT, and the second end of the compensation capacitor Cst is electrically connected to the control end of the driving tube DrT.
  • the compensation capacitor Cst can be used to store the control end of the driving tube DrT and the first end. The voltage between the terminals.
  • the first switch tube T1 has a gate, a source and a drain, wherein the gate corresponds to the control end of the first switch tube T1, and the source corresponds to one of the first end and the second end of the first switch tube T1, and the drain
  • the pole corresponds to the other of the first end and the second end of the first switching transistor T1 (hereinafter, described by the control terminal, the first end and the second end of the first switching transistor T1).
  • the first end of the first switch tube T1 is electrically connected to the first end of the drive tube DrT, and the second end of the first switch tube T1 is electrically connected to the initial voltage input end, and the initial voltage input by the initial voltage input terminal is Vinitial.
  • the second switching transistor T2 has a gate, a source and a drain, wherein the gate corresponds to the control end of the second switching transistor T2, and the source corresponds to one of the first end and the second end of the second switching transistor T2, and the drain
  • the pole corresponds to the other of the first end and the second end of the second switching tube T2 (hereinafter, described by the control end, the first end and the second end of the second switching tube T2).
  • the first end of the second switch tube T2 is electrically connected to the control end of the drive tube DrT, and the second end of the second switch tube T2 is electrically connected to the data signal input end Data, and the data signal Vdata and the reference can be input through the data signal input terminal Data. Voltage Vref.
  • the control end of the first switching transistor T1 is electrically connected to the first signal input terminal to receive the first control signal G2 input by the first signal input terminal.
  • the control end of the second switch T2 is electrically connected to the second signal input end to receive the second control signal Scan input by the second signal input end.
  • the driving tube DrT, the first switching tube T1 and the second switching tube T2 may both be TFTs (Thin Film Transistors), wherein the control end of the driving tube DrT and the control end of the first switching tube T1 And the control end of the second switch tube T2 corresponds to the gate of the TFT, the first end of the drive tube DrT, the first end of the first switch tube T1 and the first end of the second switch tube T2 can correspond to the source of the TFT One of the pole and the drain, the second end of the drive transistor DrT, the second end of the first switch transistor T1, and the second end of the second switch transistor T2 may correspond to the other of the source and the drain.
  • the first end of the drive transistor DrT may correspond to the source of the TFT.
  • the threshold voltage of the drive tube DrT can be compensated by the compensation circuit described above.
  • the first signal input terminal controls the first switch tube T1 to be turned on, and the second signal input terminal controls the second switch tube T2 to be turned on for a preset time
  • the first signal input terminal controls the first switch The tube T1 is turned off, the second signal input terminal controls the second switch tube T2 to be turned on for a preset time
  • the first signal input end controls the first switch tube T1 to be turned off, and the second signal input end controls the second switch tube T2 to be turned on.
  • the first signal input terminal controls the first switching transistor T1 to be turned off, and the second signal input terminal controls the second switching transistor T2 to be turned off.
  • the reset phase may correspond to the first time period t1
  • the compensation phase may correspond to the second time period t2
  • the write data phase may correspond to the third time period t3
  • the light-emitting phase may correspond to the fourth time period t4.
  • the first time period may be smaller than the second time period
  • the third time period may be smaller than the first time period, that is, the duration of the reset phase may be less than the duration of the compensation phase and greater than the duration of the write data phase.
  • the first control signal G2 is at a high level
  • the second control signal Scan can maintain a high level for a preset time and maintain a low level at other times.
  • the first switch tube T1 In order to control the first switch tube T1 to be continuously turned on, and to control the second switch tube T2 to be turned on for a preset time.
  • the data signal input terminal Data inputs the reference voltage Vref, whereby the voltage of the control terminal of the driving tube DrT can be controlled to be Vref, and the voltage of the first end of the driving tube DrT is Vinitial+A, wherein, A It is the voltage drop due to the current between the power supply terminal and the initial voltage input.
  • the first control signal G2 is at a low level
  • the second control signal Scan can maintain a high level for a preset time and maintain a low level at other times. Therefore, the first switch tube T1 can be controlled to be turned off, and the second switch tube T2 can be controlled to be turned on for a preset time.
  • the switch tube indicated by the broken line in Fig. 4 is in the off state, the same below.
  • the voltage of the control terminal of the drive tube DrT can be controlled to be Vref
  • the voltage of the first end of the drive tube DrT is Vref-Vth, where Vth is the threshold voltage of the drive tube DrT. That is, the voltage difference across the compensation capacitor Cst is Vth, so that the threshold voltage Vth can be saved by the compensation capacitor Cst.
  • the first control signal G2 is at a low level
  • the second control signal Scan is at a high level
  • the data signal input terminal Data is input with a data voltage Vdata, so that The first switch tube T1 is controlled to be turned off, and the second switch tube T2 is controlled to be turned on.
  • the voltage of the control terminal of the driving tube DrT can be controlled to be Vdata
  • the voltage of the first end of the driving tube DrT is Vref-Vth+a(Vdata-Vref)+ ⁇ V
  • ⁇ V is the writing data phase due to the driving tube
  • a is the ratio of the voltage distributed across the compensation capacitor Cst due to the capacitive voltage division effect in the write data phase.
  • the first control signal G2 is at a low level
  • the second control signal Scan is at a low level, so that the first switching transistor T1 and the second switching transistor T2 can be controlled. Both are closed.
  • Ku is the driving tube DrT
  • the mobility related parameters That is, Ioled is related to the parameters Ku, Vdata, Vref, and ⁇ V, and is independent of the threshold voltage Vth of the drive tube DrT.
  • the second switching transistor T2 can also be configured to receive the compensated data voltage from the data signal input terminal Data.
  • the compensated data voltage is determined based on a threshold voltage and a mobility of the driving tube DrT. This corresponds to the external compensation which will be described below.
  • the pixel compensation circuit of the embodiment of the present disclosure by the above-mentioned circuit structure using the two switching tubes T1, T2 and one compensation capacitor Cst, combined with the control strategies for T1 and T2, the current of the pixel in the light-emitting phase is not affected by the driving tube.
  • the influence of the threshold voltage Vth of DrT can compensate the variation of Vth.
  • the compensation circuit not only has a simple circuit structure, but also has high real-time compensation, which can effectively improve the display of residual image on the display panel and greatly improve the display effect of the display panel. .
  • the present disclosure also proposes a display panel.
  • the display panel 100 of the embodiment of the present disclosure includes the above-described compensation circuit 10 for pixels.
  • the problem of displaying afterimages can be effectively improved by the compensation circuit of the above-described pixels, and the display effect is good.
  • external compensation may be implemented on the basis of the compensation circuit of the pixel of the embodiment of the present disclosure, that is, the data voltage received by the compensation circuit is compensated to further improve the compensation precision.
  • this can be exemplarily implemented by providing a controller in the display panel 100.
  • the controller may be electrically connected to a compensation circuit of a pixel according to an embodiment of the present disclosure included in the display panel, for example, to the first switch tube T1 and the second switch tube T2 of the compensation circuit.
  • the controller may detect the current threshold voltage Vth of the drive tube DrT and the current mobility Mob (eg, detected by the first switch T1), and generate a threshold compensation voltage ⁇ Vth according to the current threshold voltage Vth of the drive tube DrT and the current mobility Mob. And the first mobility compensation voltage ⁇ Vmob.
  • the controller may generate a total compensation voltage according to the threshold compensation voltage ⁇ Vth and the first mobility compensation voltage ⁇ Vmob, and input the data voltage to the data signal input terminal according to the total compensation voltage. Vdata compensates.
  • the threshold compensation voltage ⁇ Vth is greater than 0.5V, the current Ioled flowing through the OLED is difficult to eliminate the influence of Vth.
  • the data voltage may be supplemented with k ⁇ Vth in the light-emitting phase, that is, the data voltage is Vdata+k ⁇ Vth+ ⁇ Vmob, where k is a compensation coefficient, which can be obtained by subsequent debugging, and the value ranges from 0 to 1.
  • the controller may generate the second mobility compensation voltage ⁇ Vmob_new according to the current threshold voltage and the changed mobility when the mobility of the driving tube DrT changes, and compensate the first mobility compensation voltage ⁇ Vmob and the second mobility at the first mobility compensation voltage ⁇ Vmob_new When the voltage difference between the voltages ⁇ Vmob_new is greater than the second predetermined threshold, the total compensation voltage is updated according to the second mobility compensation voltage ⁇ Vmob_new.
  • the data voltage can be compensated with the latest obtained mobility compensation voltage.
  • the data voltage may be Vdata+k ⁇ Vth+ ⁇ Vmob_new in the lighting phase of the next frame.
  • the controller can obtain the power-off threshold voltage and the power-off mobility of the driving tube DrT, and store the power-off threshold voltage and the power-off mobility through the memory.
  • the power-off threshold voltage and the power-off mobility stored in the memory are respectively used as an initial threshold voltage and an initial mobility after the pixel is powered on again, so that the display panel can be executed again according to the initial threshold voltage and the initial mobility when the display panel is next displayed.
  • the combination of external compensation and compensation circuit for hybrid compensation can effectively improve the compensation accuracy, thereby further improving the display effect of the display panel.
  • the present disclosure also proposes a method for performing pixel compensation by the compensation circuit of the above pixel.
  • the compensation circuit of the pixel includes a driving tube DrT having a first end and a second end and the second end is electrically connected to the power source, and the first end is electrically connected to the first end of the driving tube DrT and the second end is The compensation capacitor Cst electrically connected to the control end of the driving tube DrT, the first switching tube T1 whose first end is electrically connected to the first end of the driving tube DrT and the second end is electrically connected to the initial voltage input end, and the first end and the driving The second switch tube T2 is electrically connected to the control terminal of the transistor DrT and electrically connected to the data signal input terminal at the second end.
  • the method can include the following steps:
  • the first switch tube is controlled to be turned on, and the second switch tube is controlled to be turned on for a preset time.
  • the control end of the first switch tube T1 can input the first control signal G2, and the control end of the second switch tube T2 can input the second control signal Scan by changing the first control signal.
  • the levels of G2 and the second control signal Scan control the opening and closing of the first switching transistor and the second switching transistor.
  • the first switch tube is controlled to be closed, and the second switch tube is controlled to be turned on for a preset time.
  • the method may further include:
  • the first switch tube is controlled to be closed, and the second switch tube is controlled to be turned on.
  • the reset phase may correspond to the first time period t1
  • the compensation phase may correspond to the second time period t2
  • the write data phase may correspond to the third time period t3
  • the light-emitting phase may correspond to the fourth time period t4.
  • the first time period may be smaller than the second time period
  • the third time period may be smaller than the first time period, that is, the duration of the reset phase may be less than the duration of the compensation phase and greater than the duration of the write data phase.
  • the first control signal G2 is at a high level
  • the second control signal Scan can maintain a high level for a preset time and maintain a low level at other times.
  • the first switch tube T1 In order to control the first switch tube T1 to be continuously turned on, and to control the second switch tube T2 to be turned on for a preset time.
  • the data signal input terminal Data inputs the reference voltage Vref, whereby the voltage of the control terminal of the driving tube DrT can be controlled to be Vref, and the voltage of the first end of the driving tube DrT is Vinitial+A, wherein, A It is the voltage drop due to the current between the power supply terminal and the initial voltage input.
  • the first control signal G2 is at a low level
  • the second control signal Scan can maintain a high level for a preset time and maintain a low level at other times. Therefore, the first switch tube T1 can be controlled to be turned off, and the second switch tube T2 can be controlled to be turned on for a preset time.
  • the switch tube indicated by the broken line in FIG. 4 is in a closed state, the same below.
  • the voltage of the control terminal of the drive tube DrT can be controlled to be Vref
  • the voltage of the first end of the drive tube DrT is Vref-Vth, where Vth is the threshold voltage of the drive tube DrT. That is, the voltage difference across the compensation capacitor Cst is Vth, so that the threshold voltage Vth can be saved by the compensation capacitor Cst.
  • the first control signal G2 is at a low level
  • the second control signal Scan is at a high level
  • the data signal input terminal Data is input with a data voltage Vdata, so that The first switch tube T1 is controlled to be turned off, and the second switch tube T2 is controlled to be turned on.
  • the voltage of the control terminal of the driving tube DrT can be controlled to be Vdata
  • the voltage of the first end of the driving tube DrT is Vref-Vth+a(Vdata-Vref)+ ⁇ V
  • ⁇ V is the writing data phase due to the driving tube
  • a is the ratio of the voltage distributed across the compensation capacitor Cst due to the capacitive voltage division effect in the write data phase.
  • the first control signal G2 is at a low level
  • the second control signal Scan is at a low level, so that the first switching transistor T1 and the second switching transistor T2 can be controlled. Both are closed.
  • Ku is the driving tube DrT
  • the mobility related parameters That is, Ioled is related to the parameters Ku, Vdata, Vref, and ⁇ V, and is independent of the threshold voltage Vth of the drive tube DrT.
  • the pixels are illuminated.
  • the current in the phase is not affected by the threshold voltage Vth of the driving tube DrT, and thus the variation of Vth can be compensated.
  • the compensation method not only makes the circuit structure simple, but also has high real-time compensation, and can effectively improve the display panel residual image. , greatly improve the display effect of the display panel.
  • the present disclosure also proposes a method of performing pixel compensation by the above display panel according to an embodiment of the present disclosure.
  • the method can include the following steps:
  • S102 Generate a threshold compensation voltage and a first mobility compensation voltage according to a current threshold voltage of the driving tube and a current mobility.
  • the current threshold voltage Vth and the current mobility Mob of the drive tube DrT are detected, and the threshold compensation voltage ⁇ Vth and the first mobility compensation voltage ⁇ Vmob are further calculated.
  • the first preset threshold may be 0.5V.
  • ⁇ Vth>0.5V the current Ioled flowing through the OLED is difficult to eliminate the influence of Vth.
  • the data voltage may be supplemented by k ⁇ Vth in the illuminating phase.
  • S104 Compensating for a data voltage input to the data signal input terminal according to the total compensation voltage.
  • the compensated data voltage is Vdata+k ⁇ Vth+ ⁇ Vmob, where k is a compensation coefficient, and the compensation coefficient k can be obtained through subsequent debugging, and the value ranges from 0 to 1.
  • the mobility compensation voltage can be reacquired to be updated.
  • the total compensation voltage generates a second mobility compensation voltage ⁇ Vmob_new based on the previous threshold voltage of the drive tube that was last detected.
  • S106 Determine whether a voltage difference between the first mobility compensation voltage and the second mobility compensation voltage is greater than a second preset threshold.
  • the data voltage can be compensated with the latest obtained mobility compensation voltage.
  • the data voltage may be Vdata+k ⁇ Vth+ ⁇ Vmob_new in the lighting phase of the next frame.
  • the power-off threshold voltage and the power-off mobility of the driving tube DrT can be obtained, and the power-off threshold voltage and the power-off mobility are stored.
  • the stored power-off threshold voltage and the power-off mobility are respectively used as an initial threshold voltage and an initial mobility, so that the data can be executed again according to the initial threshold voltage and the initial mobility when the display panel is next displayed.
  • the strategy of voltage compensation is not limited to:
  • the external compensation and the compensation circuit combined with the compensation can effectively improve the compensation accuracy, thereby further improving the display effect of the display panel.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of "a plurality” is at least two, such as two, three, etc., unless specifically defined otherwise.
  • the terms “installation”, “electrical connection”, “connected”, “fixed”, and the like, are to be understood broadly, and may be either a fixed connection or a detachable, unless otherwise explicitly defined and defined. Connected, or integrated; can be mechanical or electrical; can be a direct electrical connection, or can be indirectly connected through an intermediate medium, can be the internal communication of two components or the interaction of two components, unless There are also clear limits.
  • the specific meanings of the above terms in the present disclosure can be understood by those skilled in the art on a case-by-case basis.
  • the first feature "on” or “under” the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact.
  • the first feature "above”, “above” and “above” the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

Landscapes

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

Abstract

一种像素的补偿电路(10)，包括驱动子电路(110)、补偿子电路(120)、第一开关子电路(130)和第二开关子电路(140)。驱动子电路(110)的控制端与第二开关子电路(140)的第一端电连接，第一端与发光元件(OLED,QLED)电连接，第二端与电源VDD电连接；补偿子电路(120)的第一端与驱动子电路(110)的第一端电连接，第二端与驱动子电路(110)的控制端电连接；第一开关子电路(130)的控制端与第一信号输入端(G2)电连接，第一端与驱动子电路(110)的第一端电连接，第二端与初始电压输入端(Vinitial)电连接；以及第二开关子电路(140)的控制端与第二信号输入端(Scan)电连接，第一端与驱动子电路(110)的控制端电连接，第二端与数据信号输入端(Data)电连接。

Description

显示面板、像素的补偿电路和补偿方法
相关申请的交叉引用
本申请要求于2017年6月9日提交的、申请号为201710433108.3的中国专利申请的优先权，其全部内容通过引用并入本申请中。
技术领域
本公开涉及显示控制技术领域，特别涉及一种像素的补偿电路、一种显示面板和一种像素补偿方法。
背景技术
目前，用到两个或三个开关管的OLED(Organic Light-Emitting Diode，有机发光二极管)像素驱动电路大多采取可变电源的驱动方式，虽然有些驱动电路可以不采取该驱动方式，但是需要增加的电容的数量，这无疑会给高像素数目设计带来很大困难。并且，有些驱动电路中包括开关管的接地设计，难以实施有效的像素补偿技术。
因此，目前的OLED像素驱动电路还有待改进。
发明内容
本公开第一方面实施例提出的一种像素的补偿电路。所述像素的补偿电路包括驱动子电路、补偿子电路、第一开关子电路和第二开关子电路。所述驱动子电路的控制端与第二开关子电路的第一端电连接，第一端与发光元件电连接，第二端与电源电连接；所述补偿子电路的第一端与所述驱动子电路的第一端电连接，第二端与所述驱动子电路的控制端电连接；所述第一开关子电路的控制端与第一信号输入端电连接，第一端与所述驱动子电路的第一端电连接，第二端与初始电压输入端电连接；以及所述第二开关子电路的控制端与第二信号输入端电连接，第一端与所述驱动子电路的控制端电连接，第二端与数据信号输入端电连接。
根据本发明实施例的像素的补偿电路，通过应用具有两个开关子电路和一个补偿子电路的电路结构，结合相关控制策略，使得像素在发光阶段的电流不受阈值电压Vth的影响，因而可对Vth的变化进行补偿。
在一个实施例中，在重置阶段，所述第一开关子电路在所述第一信号输入端的控制下处于开启状态，所述第二开关子电路在所述第二信号输入端的控制下在预设时间内处于开启状态；在补偿阶段，所述第一开关子电路在所述第一信号输入端的控制下处于关闭状态，所述第二开关子电路在所述第二信号输入端的控制下在预设时间内处于开启状态。
在一个实施例中，在写数据阶段，所述第一开关子电路在所述第一信号输入端的控制下处于关闭状态，所述第二开关子电路在所述第二信号输入端的控制下处于开启状态；在发光阶段，所述第一开关子电路在所述第一信号输入端的控制下处于关闭状态，所述第二开关子电路在所述第二信号输入端的控制下处于关闭状态。
在一个实施例中，所述重置阶段的持续时间小于所述补偿阶段的持续时间，并且所述写数据阶段的持续时间小于所述重置阶段的持续时间。
在一个实施例中，所述第二开关子电路被配置为从所述数据信号输入端接收经过补偿的数据电压，其中，所述经过补偿的数据电压是基于所述驱动子电路的阈值电压和迁移率确定的。
在一个实施例中，所述驱动子电路包括驱动晶体管，所述补偿子电路包括补偿电容，所述第一开关子电路包括第一开关晶体管，所述第二开关子电路包括第二开关晶体管。
本公开第二方面实施例提出的一种显示面板。所述显示面板包括本公开第一方面实施例提出的像素的补偿电路。
在一个实施例中，所述显示面板还包括控制器。所述控制器被配置为：通过所述第一开关子电路检测所述驱动子电路的当前阈值电压和当前迁移率；根据所述驱动子电路的当前阈值电压和当前迁移率生成阈值补偿电压和第一迁移率补偿电压；当所述阈值补偿电压大于第一预设阈值时，根据所述阈值补偿电压和第一迁移率补偿电压生成总补偿电压；以及根据所述总补偿电压对输入到所述补偿电路的数据电压进行补偿。
在一个实施例中，所述控制器还被配置为：当所述驱动子电路的迁移率发生变化时根据所述当前阈值电压和变化后的迁移率生成第二迁移率补偿电压，并在所述第一迁移率补偿电压和第二迁移率补偿电压之间的电压差大于第二预设阈值时，根据所述第二迁移率补偿电压对所述总补偿电压进行更新。
在一个实施例中，所述控制器还被配置为：在所述像素断电停止发光时，获取所述驱动子电路的断电阈值电压和断电迁移率，并通过存储器存储所述断电阈值电压和所述断电迁移率，以便在所述像素再次上电后将所述存储器存储的所述断电阈值电压和所述断电迁移率分别作为初始阈值电压和初始迁移率。
本公开第三方面实施例提出的一种通过根据本公开第一方面的像素的补偿电路进行像素补偿的方法。所述方法包括：在重置阶段，控制所述第一开关子电路开启，并且控制所述第二开关子电路开启预设时间；在补偿阶段，控制所述第一开关子电路关闭，并且控制所述第二开关子电路开启预设时间。
在一个实施例中，所述方法还包括：在写数据阶段，控制所述第一开关子电路关闭，并且控制所述第二开关子电路开启；在发光阶段，控制所述第一开关子电路和所述第二开关子电路关闭。
在一个实施例中，所述重置阶段的持续时间小于所述补偿阶段的持续时间，并且所述写数据阶段的持续时间小于所述重置阶段的持续时间。
本公开第四方面实施例提出了一种通过根据本公开第二方面的显示面板进行像素补偿的方法。所述方法包括：检测所述驱动子电路的当前阈值电压和当前迁移率；根据所述驱动子电路的当前阈值电压和当前迁移率生成阈值补偿电压和第一迁移率补偿电压；当所述阈值补偿电压大于第一预设阈值时，根据所述阈值补偿电压和第一迁移率补偿电压生成总补偿电压；根据所述总补偿电压对所述数据信号输入端输入的数据电压进行补偿。
在一个实施例中，所述方法还包括：在所述驱动子电路的迁移率发生变化时根据所述当前阈值电压和变化后的迁移率生成第二迁移率补偿电压；判断所述第一迁移率补偿电压和第二迁移率补偿电压之间的电压差是否大于第二预设阈值；如果大于所述第二预设阈值，则根据所述第二迁移率补偿电压对所述总补偿电压进行更新。
在一个实施例中，所述方法还包括：在所述像素断电停止发光时，获取所述驱动子电路的断电阈值电压和断电迁移率，并通对所述断电阈值电压和所述断电迁移率进行存储，以便在所述像素再次上电后将存储的所述断电阈值电压和所述断电迁移率分别作为初始阈值电压和初始迁移率。
附图说明
图1A为根据本公开实施例的像素的补偿电路示意图；
图1B为根据本公开实施例的像素的补偿电路详细示意图；
图2为根据本公开一个实施例的像素的补偿电路输入信号的时序图；
图3为根据本公开一个实施例的像素的补偿电路在重置阶段的状态示意图；
图4为根据本公开一个实施例的像素的补偿电路在补偿阶段的状态示意图；
图5为根据本公开一个实施例的像素的补偿电路在写数据阶段的状态示意图；
图6为根据本公开一个实施例的像素的补偿电路在发光阶段的状态示意图；
图7为根据本公开实施例的显示面板的方框示意图；
图8为根据本公开实施例的像素的补偿方法的流程图；
图9为根据本公开另一个实施例的像素的补偿方法的流程图；
图10为根据本公开又一个实施例的像素的补偿方法的流程图。
具体实施方式
下面详细描述本公开的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本公开，而不能理解为对本公开的限制。
下面参照附图来描述根据本公开实施例提出的像素的补偿电路、显示面板和像素的补偿方法。
需要说明的是，本公开实施例的像素可为OLED像素或QLED(Quantum Dot Light Emitting Diodes，量子点发光二极管)像素等，下面以OLED像素为例进行说明。
如图1A所示，本公开实施例提出的像素的补偿电路包括驱动子电路110、补偿子电路120、第一开关子电路130和第二开关子电路140。
具体地，驱动子电路110的控制端与第二开关子电路140的第一端电连接，第一端与发光元件电连接，第二端与电源VDD电连接。所述发光元件可以是OLED或QLED单元等。在下文中，以OLED作为发光元件的示例。
补偿子电路120的第一端与驱动子电路110的第一端电连接，第二端与驱动子电路110的控制端电连接。
第一开关子电路130的控制端与第一信号输入端G2电连接，第一端与驱动子电路110的第一端电连接，第二端与初始电压输入端Vinitial电连接。
第二开关子电路140的控制端与第二信号输入端Scan电连接，第一端与驱动子电路110的控制端电连接，第二端与数据信号输入端Data电连接。
如图1B所示，在一个实施例中，驱动子电路110可以包括驱动管DrT，补偿子电路120可以包括补偿电容Cst，第一开关子电路130可以包括第一开关管T1，以及第二开关子电路140可以包括第二开关管T2。在以下对本公开进行的具体描述中，采用如图1B所示的实施例作为示例进行描述。应该理解的是，这一实施例仅是示例性的，并不对本公开的范围进行限定。
具体地，在驱动子电路110中，驱动管DrT具有栅极、源极和漏极，其中栅极对应于驱动DrT的控制端，源极对应于驱动DrT的第一端和第二端之一，漏极对应于驱动DrT的第一端和第二端中的另一个(下文中，通过驱动DrT的控制端、第一端和第二端来进行描述)，其中，驱动管DrT的第二端与电源电连接，以通过驱动管DrT的第二端输入电源电压VDD，驱动管DrT的第一端与OLED的阳极电连接，以便为OLED提供驱动电流。
补偿电容Cst的第一端与驱动管DrT的第一端电连接，补偿电容Cst的第二端与驱动管DrT的控制端电连接，补偿电容Cst可用于存储驱动管DrT的控制端与第一端之间的电压。
第一开关管T1具有栅极、源极和漏极，其中栅极对应于第一开关管T1的控制端，源极对应于第一开关管T1的第一端和第二端之一，漏极对应于第一开关管T1的第一端和第二端中的另一个(下文中，通过第一开关管T1的控制端、第一端和第二端来进行描述)。第一开关管T1的第一端与驱动管DrT的第一端电连接，第一开关管T1的第二端与初始电压输入端电连接，初始电压输入端所输入的初始电压为Vinitial。
第二开关管T2具有栅极、源极和漏极，其中栅极对应于第二开关管T2的控制端，源极对应于第二开关管T2的第一端和第二端之一，漏极对应于第二开关管T2的第一端和第二端中的另一个(下文中，通过第二开关管T2的控制端、第一端和第二端来进行描述)。第二开关管T2的第一端与驱动管DrT的控制端电连接，第二开关管T2的第二端与数据信号输入端Data电连接，可通过数据信号输入端Data输入数据电压Vdata和参考电压Vref。
第一开关管T1的控制端与第一信号输入端电连接，以接收第一信号输入端输入的第一控制信号G2。第二开关管T2的控制端与第二信号输入端电连接，以接收第二信号输入端输入的第二控制信号Scan。
需要说明的是，驱动管DrT、第一开关管T1和第二开关管T2可均为TFT(Thin Film Transistor，薄膜晶体管)，其中，驱动管DrT的控制端、第一开关管T1的控制端和第二开关管T2的控制端均对应为TFT的栅极，驱动管DrT的第一端、第一开关管T1的第一端和第二开关管T2的第一端可对应为TFT的源极和漏极中的一个，驱动管DrT的第二端、第一开关管T1的第二端和第二开关管T2的第二端可对应为源极和漏极中的另一个。在下述示例中，驱动管DrT的第一端可对应为TFT的源极。
在本公开的一个实施例中，可通过上述补偿电路对驱动管DrT的阈值电压进行补偿。具体地，在重置阶段，第一信号输入端控制第一开关管T1开启，第二信号输入端控制第二开关管T2开启预设时间；在补偿阶段，第一信号输入端控制第一开关管T1关闭，第二信号输入端控制第二开关管T2开启预设时间；在写数据阶段，第一信号输入端控制第一开关管T1关闭，第二信号输入端控制第二开关管T2开启；在发光阶段，第一信号输入端控制第一开关管T1关闭，第二信号输入端控制第二开关管T2关闭。
如图2所示，重置阶段可对应第一时间段t1，补偿阶段可对应第二时间段t2，写数据阶段可对应第三时间段t3，发光阶段可对应第四时间段t4。其中，第一时间段可小于第二时间段，第三时间段可小于第一时间段，也就是说，重置阶段的持续时间可小于补偿阶段的持续时间，并大于写数据阶段的持续时间。
如图2和图3所示，在重置阶段即t1时期，第一控制信号G2为高电平，第二控制信号Scan可在预设时间内维持高电平，并在其他时间维持低电平，从而可控制第一开关管T1持续开启，并控制第二开关管T2开启预设时间。并且，在预设时间内，数据信号输入端Data输入参考电压Vref，由此，可控制驱动管DrT的控制端的电压为Vref，驱动管DrT的第一端的电压为Vinitial+A，其中，A为由于电源端与初始电压输入端之间存在电流而产生的压降。
如图2和图4所示，在补偿阶段即t2时期，第一控制信号G2为低电平，第二控制信号Scan可在预设时间内维持高电平，并在其他时间维持低电平，从而可控制第一开关管T1关闭，并控制第二开关管T2开启预设时间。其中，图4 中虚线所表示的开关管为关闭状态，下同。由此，可控制驱动管DrT的控制端的电压为Vref，驱动管DrT的第一端的电压为Vref-Vth，其中，Vth为驱动管DrT的阈值电压。也就是说，补偿电容Cst两端的电压差为Vth，从而可通过补偿电容Cst保存该阈值电压Vth。
如图2和图5所示，在写数据阶段即t3时期，第一控制信号G2为低电平，第二控制信号Scan为高电平，并且数据信号输入端Data输入数据电压Vdata，从而可控制第一开关管T1关闭，并控制第二开关管T2开启。由此，可控制驱动管DrT的控制端的电压为Vdata，驱动管DrT的第一端的电压为Vref-Vth+a(Vdata-Vref)+△V，其中，△V为写数据阶段因驱动管DrT漏电而产生的电压差，a为写数据阶段因电容分压效应导致的分配到补偿电容Cst两端的电压比例。
如图2和图6所示，在发光阶段即t4时期，第一控制信号G2为低电平，第二控制信号Scan为低电平，从而可控制第一开关管T1和第二开关管T2均关闭。由此，可控制驱动管DrT的控制端与第一端之间的电压Vgs＝(1-a)(Vdata-Vref)+Vth-△V。而流过OLED的电流Ioled＝1/2×Ku(Vgs-Vth) 2＝1/2×Ku((1-a)(Vdata-Vref)-△V) 2，其中，Ku为与驱动管DrT的迁移率有关的参数。也就是说，Ioled与参数Ku、Vdata、Vref和△V等相关，而与驱动管DrT的阈值电压Vth无关。
在一个实施例中，第二开关管T2还可被配置为从数据信号输入端Data接收经过补偿的数据电压。其中，所述经过补偿的数据电压是基于驱动管DrT的阈值电压和迁移率确定的。这对应于下文将描述的外补偿。
根据本公开实施例的像素的补偿电路，通过上述应用两个开关管T1、T2和一个补偿电容Cst的电路结构，结合对T1、T2的控制策略，使得像素在发光阶段的电流不受驱动管DrT的阈值电压Vth的影响，因而可对Vth的变化进行补偿，该补偿电路不仅电路结构简单，而且补偿的实时性较高，能够有效改善显示面板显示残像的问题，大大提高显示面板的显示效果。
对应上述实施例，本公开还提出一种显示面板。
如图7所示，本公开实施例的显示面板100，包括上述的像素的补偿电路10。
根据本公开实施例的显示面板，通过上述像素的补偿电路，能够有效改善显示残像的问题，显示效果较好。
此外，还可在本公开的实施例的像素的补偿电路的基础上实施外补偿，即对补偿电路所接收的数据电压进行补偿，以进一步提高补偿精度。具体地，这可示例性地通过在显示面板100中设置控制器来实现。
具体地，所述控制器可以与显示面板所包括的根据本公开实施例的像素的补偿电路电连接，例如与补偿电路的第一开关管T1和第二开关管T2电连接。控制器可检测驱动管DrT的当前阈值电压Vth和当前迁移率Mob(例如，通过第一开关管T1来检测)，并根据驱动管DrT的当前阈值电压Vth和当前迁移率Mob生成阈值补偿电压ΔVth和第一迁移率补偿电压ΔVmob。
其中，当阈值补偿电压ΔVth大于第一预设阈值时，控制器可根据阈值补偿电压ΔVth和第一迁移率补偿电压ΔVmob生成总补偿电压，并根据总补偿电压对数据信号输入端输入的数据电压Vdata进行补偿。在本公开的一个实施例中，当阈值补偿电压ΔVth大于0.5V时，流过OLED的电流Ioled便难以排除Vth的影响了，此时在发光阶段可对数据电压补加kΔVth，即数据电压为Vdata+kΔVth+ΔVmob，其中，k为补偿系数，该补偿系数k可通过后续调试获取，取值范围为0～1。
由于驱动管DrT的迁移率受温度的影响较大，在驱动管DrT的迁移率发生变化时，例如在data black时间，即每一帧不写数据的时间可对迁移率补偿电压进行重新获取以更新总补偿电压。具体地，控制器可在驱动管DrT的迁移率发生变化时根据当前阈值电压和变化后的迁移率生成第二迁移率补偿电压ΔVmob_new，并在第一迁移率补偿电压ΔVmob和第二迁移率补偿电压ΔVmob_new之间的电压差大于第二预设阈值时，根据第二迁移率补偿电压ΔVmob_new对总补偿电压进行更新。也就是说，如果迁移率补偿电压变化较大，可以以最新得到的迁移率补偿电压对数据电压进行补偿。在本公开的一个实施例中，当获取到所有行的驱动管DrT的迁移率后，在下一帧的发光阶段，数据电压可为Vdata+kΔVth+ΔVmob_new。
在像素断电停止发光，例如OLED显示面板因关机而停止发光时，控制器可获取驱动管DrT的断电阈值电压和断电迁移率，并通过存储器存储断电阈值电压和断电迁移率，以便在像素再次上电后将存储器存储的断电阈值电压和断电迁移率分别作为初始阈值电压和初始迁移率，从而在显示面板下一次显示时可根据该初始阈值电压和初始迁移率再次执行对数据电压进行补偿的策略。
综上所述，通过外补偿与补偿电路相结合进行混合补偿，能够有效提高补偿精度，从而进一步提高了显示面板的显示效果。
对应上述实施例，本公开还提出一种通过上述像素的补偿电路进行像素补偿的方法。
其中，参照图1B，像素的补偿电路包括具有第一端和第二端且第二端与电源电连接的驱动管DrT、第一端与驱动管DrT的第一端电连接且第二端与驱动管DrT的控制端电连接的补偿电容Cst、第一端与驱动管DrT的第一端电连接且第二端与初始电压输入端电连接的第一开关管T1、和第一端与驱动管DrT的控制端电连接且第二端与数据信号输入端电连接的第二开关管T2。
如图8所示，所述方法可包括以下步骤：
S1，在重置阶段，控制所述第一开关管开启，控制所述第二开关管开启预设时间。
在本公开的实施例中，参照图1B，第一开关管T1的控制端可输入第一控制信号G2，第二开关管T2的控制端可输入第二控制信号Scan，通过改变第一控制信号G2和第二控制信号Scan的电平可控制第一开关管和第二开关管的开闭。
S2，在补偿阶段，控制所述第一开关管关闭，控制所述第二开关管开启预设时间。
如图9所示，所述方法还可包括：
S3，在写数据阶段，控制第一开关管关闭，控制第二开关管开启。
S4，在发光阶段，控制第一开关管和第二开关管均关闭。
其中，如图2所示，重置阶段可对应第一时间段t1，补偿阶段可对应第二时间段t2，写数据阶段可对应第三时间段t3，发光阶段可对应第四时间段t4。其中，第一时间段可小于第二时间段，第三时间段可小于第一时间段，也就是说，重置阶段的持续时间可小于补偿阶段的持续时间，并大于写数据阶段的持续时间。
如图2和图3所示，在重置阶段即t1时期，第一控制信号G2为高电平，第二控制信号Scan可在预设时间内维持高电平，并在其他时间维持低电平，从而可控制第一开关管T1持续开启，并控制第二开关管T2开启预设时间。并且，在预设时间内，数据信号输入端Data输入参考电压Vref，由此，可控制驱动管DrT的控制端的电压为Vref，驱动管DrT的第一端的电压为Vinitial+A，其中，A为由于电源端与初始电压输入端之间存在电流而产生的压降。
如图2和图4所示，在补偿阶段即t2时期，第一控制信号G2为低电平，第二控制信号Scan可在预设时间内维持高电平，并在其他时间维持低电平，从而可控制第一开关管T1关闭，并控制第二开关管T2开启预设时间。其中，图4中虚线所表示的开关管为关闭状态，下同。由此，可控制驱动管DrT的控制端的电压为Vref，驱动管DrT的第一端的电压为Vref-Vth，其中，Vth为驱动管DrT的阈值电压。也就是说，补偿电容Cst两端的电压差为Vth，从而可通过补偿电容Cst保存该阈值电压Vth。
如图2和图5所示，在写数据阶段即t3时期，第一控制信号G2为低电平，第二控制信号Scan为高电平，并且数据信号输入端Data输入数据电压Vdata，从而可控制第一开关管T1关闭，并控制第二开关管T2开启。由此，可控制驱动管DrT的控制端的电压为Vdata，驱动管DrT的第一端的电压为Vref-Vth+a(Vdata-Vref)+△V，其中，△V为写数据阶段因驱动管DrT漏电而产生的电压差，a为写数据阶段因电容分压效应导致的分配到补偿电容Cst两端的电压比例。
如图2和图6所示，在发光阶段即t4时期，第一控制信号G2为低电平，第二控制信号Scan为低电平，从而可控制第一开关管T1和第二开关管T2均关闭。由此，可控制驱动管DrT的控制端与第一端之间的电压Vgs＝(1-a)(Vdata-Vref)+Vth-△V。而流过OLED的电流Ioled＝1/2×Ku(Vgs-Vth) 2＝1/2×Ku((1-a)(Vdata-Vref)-△V) 2，其中，Ku为与驱动管DrT的迁移率有关的参数。也就是说，Ioled与参数Ku、Vdata、Vref和△V等相关，而与驱动管DrT的阈值电压Vth无关。
根据本公开实施例的像素的补偿方法，通过上述应用两个开关管T1、T2和一个补偿电容Cst的电路结构，结合在重置阶段和补偿阶段对T1、T2的控制策略，使得像素在发光阶段的电流不受驱动管DrT的阈值电压Vth的影响，因而可对Vth的变化进行补偿，该补偿方法不仅使得电路结构简单，而且补偿的实时性较高，能够有效改善显示面板显示残像的问题，大大提高显示面板的显示效果。
为进一步提高补偿精度，本公开还提出一种通过上述根据本公开实施例的显示面板进行像素补偿的方法。
如图10所示，所述方法可包括以下步骤：
S101，检测驱动管的当前阈值电压和当前迁移率(例如，通过第一开关管来检测)。
S102，根据驱动管的当前阈值电压和当前迁移率生成阈值补偿电压和第一迁移率补偿电压。
检测到驱动管DrT的当前阈值电压Vth和当前迁移率Mob，并进一步计算得到阈值补偿电压ΔVth和第一迁移率补偿电压ΔVmob。
S103，当阈值补偿电压大于第一预设阈值时，根据阈值补偿电压和第一迁移率补偿电压生成总补偿电压。
其中，第一预设阈值可为0.5V，当ΔVth＞0.5V时，流过OLED的电流Ioled便难以排除Vth的影响了，此时在发光阶段可对数据电压补加kΔVth。
S104，根据总补偿电压对数据信号输入端输入的数据电压进行补偿。
具体地，补偿后的数据电压为Vdata+kΔVth+ΔVmob，其中，k为补偿系数，该补偿系数k可通过后续调试获取，取值范围为0～1。
S105，在驱动管的迁移率发生变化时根据当前阈值电压和变化后的迁移率生成第二迁移率补偿电压。
由于驱动管DrT的迁移率受温度的影响较大，在驱动管DrT迁移率发生变化时，例如在data black时间，即每一帧不写数据的时间可对迁移率补偿电压进行重新获取以更新总补偿电压，可以上一次检测的驱动管的前次阈值电压为基准生成第二迁移率补偿电压ΔVmob_new。
S106，判断第一迁移率补偿电压和第二迁移率补偿电压之间的电压差是否大于第二预设阈值。
S107，如果大于第二预设阈值，则根据第二迁移率补偿电压对总补偿电压进行更新。
也就是说，如果迁移率补偿电压变化较大，可以以最新得到的迁移率补偿电压对数据电压进行补偿。在本公开的一个实施例中，当获取到所有行的驱动管DrT的迁移率后，在下一帧的发光阶段，数据电压可为Vdata+kΔVth+ΔVmob_new。
在像素断电停止发光，例如OLED显示面板因关机而停止发光后，可获取驱动管DrT的断电阈值电压和断电迁移率，并对该断电阈值电压和断电迁移率进行存储，以便在像素再次上电后将存储的断电阈值电压和断电迁移率分别作为 初始阈值电压和初始迁移率，从而在显示面板下一次显示时可根据该初始阈值电压和初始迁移率再次执行对数据电压进行补偿的策略。
综上所述，通过外补偿与补偿电路相结合混合补偿，能够有效提高补偿精度，从而进一步提高了显示面板的显示效果。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本公开的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本公开中，除非另有明确的规定和限定，术语“安装”、“电连接”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接电连接，也可以通过中间媒介间接电连接，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本公开中的具体含义。
在本公开中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述 的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
尽管上面已经示出和描述了本公开的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本公开的限制，本领域的普通技术人员在本公开的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (16)

  1. 一种像素的补偿电路，包括驱动子电路、补偿子电路、第一开关子电路和第二开关子电路，其中，
    所述驱动子电路的控制端与第二开关子电路的第一端电连接，第一端与发光元件电连接，第二端与电源电连接；
    所述补偿子电路的第一端与所述驱动子电路的第一端电连接，第二端与所述驱动子电路的控制端电连接；
    所述第一开关子电路的控制端与第一信号输入端电连接，第一端与所述驱动子电路的第一端电连接，第二端与初始电压输入端电连接；以及
    所述第二开关子电路的控制端与第二信号输入端电连接，第一端与所述驱动子电路的控制端电连接，第二端与数据信号输入端电连接。
  2. 如权利要求1所述的像素的补偿电路，其中，
    在重置阶段，所述第一开关子电路被配置为在所述第一信号输入端的控制下处于开启状态，所述第二开关子电路被配置为在所述第二信号输入端的控制下在预设时间内处于开启状态；
    在补偿阶段，所述第一开关子电路被配置为在所述第一信号输入端的控制下处于关闭状态，所述第二开关子电路被配置为在所述第二信号输入端的控制下在预设时间内处于开启状态。
  3. 如权利要求2所述的像素的补偿电路，其中，
    在写数据阶段，所述第一开关子电路被配置为在所述第一信号输入端的控制下处于关闭状态，所述第二开关子电路被配置为在所述第二信号输入端的控制下处于开启状态；
    在发光阶段，所述第一开关子电路被配置为在所述第一信号输入端的控制下处于关闭状态，所述第二开关子电路被配置为在所述第二信号输入端的控制下处于关闭状态。
  4. 如权利要求3所述的像素的补偿电路，其中，所述重置阶段的持续时间小于所述补偿阶段的持续时间，并且所述写数据阶段的持续时间小于所述重置阶段的持续时间。
  5. 如权利要求1所述的像素的补偿电路，其中，所述第二开关子电路被配置 为从所述数据信号输入端接收经过补偿的数据电压，其中，所述经过补偿的数据电压是基于所述驱动子电路的阈值电压和迁移率确定的。
  6. 如权利要求1所述的像素的补偿电路，其中，所述驱动子电路包括驱动晶体管，所述补偿子电路包括补偿电容，所述第一开关子电路包括第一开关晶体管，所述第二开关子电路包括第二开关晶体管，其中，
    所述驱动晶体管的栅极连接到所述驱动子电路的控制端，源极连接到所述驱动子电路的第一端和第二端之一，漏极连接到所述驱动子电路的第一端和第二段中的另一个，
    所述补偿电容的一端连接到所述补偿子电路的第一端和第二端之一，另一端连接到所述补偿子电路的第一端和第二端中的另一个，
    所述第一开关晶体管的栅极连接到所述第一开关晶体管子电路的控制端，源极连接到所述第一开关晶体管子电路的第一端和第二端之一，漏极连接到所述第一开关晶体管子电路的第一端和第二段中的另一个，
    所述第二开关晶体管的栅极连接到所述第二开关子电路的控制端，源极连接到所述第二开关子电路的第一端和第二端之一，漏极连接到所述第二开关子电路的第一端和第二段中的另一个。
  7. 一种显示面板，包括根据权利要求1-6中的任一项所述的像素的补偿电路。
  8. 如权利要求7所述的显示面板，还包括控制器，所述控制器被配置为：
    检测所述驱动子电路的当前阈值电压和当前迁移率；
    根据所述驱动子电路的当前阈值电压和当前迁移率生成阈值补偿电压和第一迁移率补偿电压；
    当所述阈值补偿电压大于第一预设阈值时，根据所述阈值补偿电压和第一迁移率补偿电压生成总补偿电压；以及
    根据所述总补偿电压对输入到所述补偿电路的数据电压进行补偿。
  9. 如权利要求8所述的显示面板，其中，所述控制器还被配置为：当所述驱动子电路的迁移率发生变化时根据所述当前阈值电压和变化后的迁移率生成第二迁移率补偿电压，并在所述第一迁移率补偿电压和第二迁移率补偿电压之间的电压差大于第二预设阈值时，根据所述第二迁移率补偿电压对所述总补偿电压进行更新。
  10. 如权利要求9所述的显示面板，其中，所述控制器还被配置为：在所述 像素断电停止发光时，获取所述驱动子电路的断电阈值电压和断电迁移率，并通过存储器存储所述断电阈值电压和所述断电迁移率，以便在所述像素再次上电后将所述存储器存储的所述断电阈值电压和所述断电迁移率分别作为初始阈值电压和初始迁移率。
  11. 一种通过根据权利要求1-6中的任一项所述的像素的补偿电路进行像素补偿的方法，包括：
    在重置阶段，控制所述第一开关子电路开启，并且控制所述第二开关子电路开启预设时间；
    在补偿阶段，控制所述第一开关子电路关闭，并且控制所述第二开关子电路开启预设时间。
  12. 如权利要求11所述的方法，还包括：
    在写数据阶段，控制所述第一开关子电路关闭，并且控制所述第二开关子电路开启；
    在发光阶段，控制所述第一开关子电路和所述第二开关子电路关闭。
  13. 如权利要求12所述的方法，其中，所述重置阶段的持续时间小于所述补偿阶段的持续时间，并且所述写数据阶段的持续时间小于所述重置阶段的持续时间。
  14. 一种通过根据权利要求7-10中的任一项所述的显示面板进行像素补偿的方法，包括：
    检测所述驱动子电路的当前阈值电压和当前迁移率；
    根据所述驱动子电路的当前阈值电压和当前迁移率生成阈值补偿电压和第一迁移率补偿电压；
    当所述阈值补偿电压大于第一预设阈值时，根据所述阈值补偿电压和第一迁移率补偿电压生成总补偿电压；
    根据所述总补偿电压对所述数据信号输入端输入的数据电压进行补偿。
  15. 如权利要求14所述的方法，还包括：
    在所述驱动子电路的迁移率发生变化时根据所述当前阈值电压和变化后的迁移率生成第二迁移率补偿电压；
    判断所述第一迁移率补偿电压和第二迁移率补偿电压之间的电压差是否大于第二预设阈值；
    如果大于所述第二预设阈值，则根据所述第二迁移率补偿电压对所述总补偿电压进行更新。
  16. 如权利要求15所述的方法，还包括：
    在所述像素断电停止发光时，获取所述驱动子电路的断电阈值电压和断电迁移率，并通对所述断电阈值电压和所述断电迁移率进行存储，以便在所述像素再次上电后将存储的所述断电阈值电压和所述断电迁移率分别作为初始阈值电压和初始迁移率。
PCT/CN2018/073007 2017-06-09 2018-01-17 显示面板、像素的补偿电路和补偿方法 WO2018223702A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US16/096,796 US10762844B2 (en) 2017-06-09 2018-01-17 Pixel driving circuit and method for driving the same, display panel and compensation
EP18814097.4A EP3637400A4 (en) 2017-06-09 2018-01-17 DISPLAY BOARD, PIXEL COMPENSATION CIRCUIT AND COMPENSATION PROCEDURE
JP2019544901A JP2020522724A (ja) 2017-06-09 2018-01-17 表示パネル、画素の補正回路および補正方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710433108.3 2017-06-09
CN201710433108.3A CN106991969B (zh) 2017-06-09 2017-06-09 显示面板、像素的补偿电路和补偿方法

Publications (1)

Publication Number Publication Date
WO2018223702A1 true WO2018223702A1 (zh) 2018-12-13

Family

ID=59421568

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/073007 WO2018223702A1 (zh) 2017-06-09 2018-01-17 显示面板、像素的补偿电路和补偿方法

Country Status (5)

Country Link
US (1) US10762844B2 (zh)
EP (1) EP3637400A4 (zh)
JP (1) JP2020522724A (zh)
CN (1) CN106991969B (zh)
WO (1) WO2018223702A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116895251A (zh) * 2023-04-18 2023-10-17 惠科股份有限公司 像素驱动电路、驱动方法和显示装置

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106991969B (zh) 2017-06-09 2019-06-14 京东方科技集团股份有限公司 显示面板、像素的补偿电路和补偿方法
CN107731160B (zh) * 2017-10-11 2019-08-30 深圳市华星光电半导体显示技术有限公司 一种应用于显示面板的温度补偿电路、方法及显示面板
US10388226B2 (en) 2017-10-11 2019-08-20 Shenzhen China Optoelectronics Semiconductor Display Technology Co., Ltd. Temperature compensation circuit and method for a display panel and display panel
CN107749280A (zh) 2017-12-06 2018-03-02 京东方科技集团股份有限公司 显示装置的驱动方法及显示装置
CN108053793B (zh) * 2017-12-15 2020-02-04 京东方科技集团股份有限公司 显示装置、显示基板及显示补偿方法和装置
CN108417178A (zh) * 2018-03-13 2018-08-17 京东方科技集团股份有限公司 阵列基板、其驱动方法、电致发光显示面板及显示装置
CN109493805B (zh) 2018-12-12 2021-04-27 合肥鑫晟光电科技有限公司 一种显示面板的补偿方法和装置
CN109727578A (zh) * 2018-12-14 2019-05-07 合肥鑫晟光电科技有限公司 显示装置的补偿方法、装置和显示设备
CN109658856B (zh) * 2019-02-28 2021-03-19 京东方科技集团股份有限公司 像素数据补偿参数获取方法及装置、amoled显示面板
CN110060627B (zh) * 2019-04-08 2020-11-10 深圳市华星光电半导体显示技术有限公司 像素驱动电路及显示面板
CN110070833B (zh) * 2019-04-19 2020-08-04 深圳市华星光电半导体显示技术有限公司 Oled显示面板及其驱动方法
CN110890055A (zh) * 2019-11-25 2020-03-17 南京中电熊猫平板显示科技有限公司 一种自发光显示装置以及像素内补偿电路
CN111446282B (zh) * 2020-04-28 2022-04-22 京东方科技集团股份有限公司 显示基板及显示装置
CN111462698A (zh) * 2020-04-28 2020-07-28 合肥京东方光电科技有限公司 一种像素驱动电路、显示面板及显示装置
CN111833814A (zh) * 2020-07-30 2020-10-27 合肥京东方卓印科技有限公司 像素电路、显示面板及其驱动方法
TWI747405B (zh) * 2020-07-30 2021-11-21 友達光電股份有限公司 畫素電路及其驅動方法
KR20230025596A (ko) * 2021-08-13 2023-02-22 삼성디스플레이 주식회사 표시 장치 및 표시 장치의 구동 방법
CN114187876A (zh) * 2021-11-26 2022-03-15 绵阳惠科光电科技有限公司 像素驱动电路、显示面板及电子设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101986378A (zh) * 2010-11-09 2011-03-16 华南理工大学 有源有机发光二极管显示器像素驱动电路及其驱动方法
CN102222468A (zh) * 2011-06-23 2011-10-19 华南理工大学 有源有机发光二极管显示器交流像素驱动电路及驱动方法
CN103123774A (zh) * 2011-11-18 2013-05-29 乐金显示有限公司 有机发光二极管显示装置
CN104751804A (zh) * 2015-04-27 2015-07-01 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
KR101577907B1 (ko) * 2014-09-02 2015-12-16 엘지디스플레이 주식회사 유기발광 표시장치의 문턱전압 변화값 센싱 방법
CN105575332A (zh) * 2014-10-31 2016-05-11 乐金显示有限公司 有机发光二极管显示装置及其驱动方法
CN106991969A (zh) * 2017-06-09 2017-07-28 京东方科技集团股份有限公司 显示面板、像素的补偿电路和补偿方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1666242A (zh) * 2002-04-26 2005-09-07 东芝松下显示技术有限公司 用于场致发光显示屏的驱动电路
KR100833756B1 (ko) * 2007-01-15 2008-05-29 삼성에스디아이 주식회사 유기 전계 발광 표시 장치
EP2254108A1 (en) * 2009-05-20 2010-11-24 Dialog Semiconductor GmbH Extended multi line address driving
CN101866619B (zh) 2010-05-06 2013-01-23 友达光电股份有限公司 有机发光二极管的像素电路及其显示器与驱动方法
JP2013061390A (ja) * 2011-09-12 2013-04-04 Canon Inc 表示装置
JP6290576B2 (ja) * 2012-10-12 2018-03-07 株式会社半導体エネルギー研究所 液晶表示装置及びその駆動方法
KR102027169B1 (ko) * 2012-12-21 2019-10-01 엘지디스플레이 주식회사 유기 발광 디스플레이 장치와 이의 구동 방법
CN103383835B (zh) * 2013-07-02 2015-09-09 京东方科技集团股份有限公司 一种像素电路、显示面板及显示装置
CN103474025B (zh) * 2013-09-06 2015-07-01 京东方科技集团股份有限公司 一种像素电路及显示器
CN103700347B (zh) * 2014-01-10 2015-11-04 深圳市华星光电技术有限公司 有机发光二极管的驱动电路
CN103839520B (zh) * 2014-02-28 2017-01-18 京东方科技集团股份有限公司 像素电路及其驱动方法、显示面板和显示装置
US9818367B2 (en) * 2015-03-17 2017-11-14 Apple Inc. Content-driven slew rate control for display driver
EP3098805B1 (en) * 2015-05-28 2018-07-25 LG Display Co., Ltd. Organic light emitting display and circuit thereof
JP6652707B2 (ja) * 2016-06-24 2020-02-26 富士通株式会社 判定帰還型等化回路及び半導体集積回路

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101986378A (zh) * 2010-11-09 2011-03-16 华南理工大学 有源有机发光二极管显示器像素驱动电路及其驱动方法
CN102222468A (zh) * 2011-06-23 2011-10-19 华南理工大学 有源有机发光二极管显示器交流像素驱动电路及驱动方法
CN103123774A (zh) * 2011-11-18 2013-05-29 乐金显示有限公司 有机发光二极管显示装置
KR101577907B1 (ko) * 2014-09-02 2015-12-16 엘지디스플레이 주식회사 유기발광 표시장치의 문턱전압 변화값 센싱 방법
CN105575332A (zh) * 2014-10-31 2016-05-11 乐金显示有限公司 有机发光二极管显示装置及其驱动方法
CN104751804A (zh) * 2015-04-27 2015-07-01 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
CN106991969A (zh) * 2017-06-09 2017-07-28 京东方科技集团股份有限公司 显示面板、像素的补偿电路和补偿方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3637400A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116895251A (zh) * 2023-04-18 2023-10-17 惠科股份有限公司 像素驱动电路、驱动方法和显示装置

Also Published As

Publication number Publication date
CN106991969B (zh) 2019-06-14
US10762844B2 (en) 2020-09-01
CN106991969A (zh) 2017-07-28
EP3637400A1 (en) 2020-04-15
US20200234644A1 (en) 2020-07-23
EP3637400A4 (en) 2021-03-03
JP2020522724A (ja) 2020-07-30

Similar Documents

Publication Publication Date Title
WO2018223702A1 (zh) 显示面板、像素的补偿电路和补偿方法
CN107492343B (zh) 用于oled显示设备的像素驱动电路、oled显示设备
JP6799166B2 (ja) Ａｍｏｌｅｄ画素駆動回路および駆動方法
US11127350B2 (en) Pixel circuit, active matrix organic light emitting diode display panel, display apparatus, and method of compensating threshold voltage of driving transistor
WO2018166172A1 (zh) 像素驱动电路及其驱动方法、显示装置
US9852687B2 (en) Display device and driving method
JP5037858B2 (ja) 表示装置
KR101932744B1 (ko) 픽셀 회로, 이를 위한 구동 방법 및 능동형 유기 발광 디스플레이
KR101794648B1 (ko) 유기발광다이오드 표시장치
CN107767814A (zh) 像素电路、显示装置和双栅驱动晶体管
CN105590955A (zh) 像素电路及其驱动方法和有源矩阵有机发光显示器
US20190228708A1 (en) Pixel circuit, pixel driving method and display device
WO2016086626A1 (zh) 一种像素驱动电路、像素驱动方法和显示装置
CN104485071A (zh) 像素电路及其驱动方法和有源矩阵有机发光显示器
KR100543013B1 (ko) 유기전계발광표시장치의 픽셀구동회로
JP2009300753A (ja) 表示装置及び駆動方法
JP2007310311A (ja) 表示装置及びその駆動方法
WO2016086627A1 (zh) 一种像素驱动电路、像素驱动方法和显示装置
JP6911276B2 (ja) ピクセル駆動回路及びｏｌｅｄディスプレイ装置
JP2015043041A (ja) 電気光学装置
JP4590831B2 (ja) 表示装置、および画素回路の駆動方法
US20090102759A1 (en) Pixel drive circuit for organic el display
US20100128014A1 (en) Pixel and organic light emitting display device using the same
TW201445535A (zh) 有機發光顯示裝置
TW200527351A (en) Driving circuit, electro-optical device, method of driving the same, and electronic apparatus

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18814097

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2019544901

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2018814097

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2018814097

Country of ref document: EP

Effective date: 20200109