WO2018205717A1 - 有机电致发光显示器的补偿方法和补偿装置、显示设备 - Google Patents

有机电致发光显示器的补偿方法和补偿装置、显示设备 Download PDF

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Publication number
WO2018205717A1
WO2018205717A1 PCT/CN2018/077721 CN2018077721W WO2018205717A1 WO 2018205717 A1 WO2018205717 A1 WO 2018205717A1 CN 2018077721 W CN2018077721 W CN 2018077721W WO 2018205717 A1 WO2018205717 A1 WO 2018205717A1
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Prior art keywords
compensated
sub
line
pixel
transistor
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PCT/CN2018/077721
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English (en)
French (fr)
Inventor
徐海侠
孟松
吴月
鲍文超
何敏
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京东方科技集团股份有限公司
合肥鑫晟光电科技有限公司
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Priority to EP18797939.8A priority Critical patent/EP3624099A4/en
Priority to JP2019554662A priority patent/JP7148540B2/ja
Priority to US16/094,442 priority patent/US11393394B2/en
Publication of WO2018205717A1 publication Critical patent/WO2018205717A1/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]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—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
    • G09G2300/0426—Layout of electrodes and connections
    • 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
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/061—Details of flat display driving waveforms for resetting or blanking
    • 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
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • Embodiments of the present disclosure relate to a compensation method and compensation device, a display device for an Organic Light-Emitting Display (OLED).
  • OLED Organic Light-Emitting Display
  • AMOLED Active-Matrix Organic Light-Emitting Display
  • LCDs liquid crystal displays
  • the Thin Film Transistor (TFT) in AMOLED has a threshold voltage drift under long-term stress and high temperature conditions. Due to different display screens and different data voltages written, the threshold drift of the driving thin film transistors of each part of the AMOLED panel is different, which may cause a difference in display brightness. Since this difference is related to the image displayed before the current frame picture, it is often presented as The phenomenon of afterimage, also known as the afterimage.
  • the sensing circuit of the driving chip extracts the electrical signal of the driving thin film transistor of the pixel, and determines the compensation voltage value to be compensated by the integrated circuit chip, and feeds back to the driving chip to realize compensation.
  • the last several rows of scanning time of one frame is usually used as the scanning time of the blank area. Since the blank area does not have pixels, it can be detected in the scanning time of the blank area.
  • the electrical signal and the value of the compensation voltage are determined.
  • the electrical signal of the driving thin film transistor of a certain row of pixels is detected during the display time of each frame.
  • a sense line is usually connected between the driving thin film transistor and the OLED device, and a sensing thin film transistor is disposed between the sensing line and the driving thin film transistor.
  • the sensing thin film transistor is turned on. At this time, the current flowing to the OLED device flows to the sensing line, thereby causing the OLED device to be darkened, that is, the dark pixels of the row of pixels appear.
  • At least one embodiment of the present disclosure provides a compensation method for an organic electroluminescent display (OLED), the compensation method including: determining, according to a data voltage and a gain value of a current frame of a sub-pixel to be compensated for a line to be compensated Determining a writeback voltage of each of the to-be-compensated sub-pixels of the compensation line in the current frame, the gain value is greater than 1; in a scan time of a blank area of the current frame, the line to be compensated The writeback voltage of each of the to-be-compensated sub-pixels in the current frame is respectively written back to the corresponding sub-pixel to be compensated in the to-be-compensated row.
  • OLED organic electroluminescent display
  • the display time of the current frame includes a plurality of row scan times
  • the scan time of the blank region includes the last W1 of the plurality of row scan times.
  • Row scan time, the last W1 row scan time includes a charging phase and a compensation writeback phase, wherein W1 is a positive integer
  • the compensation method includes: in the charging phase, each of the rows to be compensated The sensing line corresponding to the sub-pixel to be compensated is charged, and the sensing line is used to detect an electrical signal of the sub-pixel to be compensated; in the compensation write-back phase, according to the detected electrical line of the sensing line The signal calculates a compensation voltage of each of the to-be-compensated sub-pixels of the to-be-compensated row in an adjacent next frame of the current frame.
  • the compensation method further includes: in the compensation write back phase, each of the to-be-compensated sub-pixels of the to-be-compensated row is in the The writeback voltages of the current frame are respectively written back to the corresponding sub-pixels to be compensated in the to-be-compensated row.
  • the writeback voltage of the sub-pixel to be compensated in the current frame includes: acquiring a gain value of each of the to-be-compensated sub-pixels; respectively, respectively, the data voltage and the gain value of each of the to-be-compensated sub-pixels in the current frame Multiplying to obtain a writeback voltage of each of the sub-pixels to be compensated in the current frame.
  • all the to-be-compensated sub-pixels of the to-be-compensated row have the same color.
  • the gain value of the sub-pixel to be compensated of the line to be compensated corresponds to the color corresponding to the sub-pixel to be compensated.
  • the sub-pixel to be compensated includes a pixel circuit, and the pixel circuit includes a driving transistor, a data writing transistor, and a sensing transistor, and the compensation is written back.
  • the phase includes a write back sub-phase and a re-lighting sub-phase, wherein each of the to-be-compensated sub-pixels of the to-be-compensated row is written back to the corresponding to-be-compensated row in the current frame
  • the sub-pixel to be compensated includes: resetting the voltage of the sensing line when the charging phase is completed; controlling each of the to-be-compensated sub-pixels of the line to be compensated in the writing back sub-phase Writing the data write transistor to the gate of the drive transistor of each of the to-be-compensated sub-pixels of the line to be compensated; controlling the re-emission sub-phase
  • the data writing transistor of each of the to-be-compensated sub-pixels of the line to be compensated is turned off, and the sensing transistor of each of the to-be-compensated sub-pixels of the line to be compensated is controlled to be turned off.
  • the driving signal of the data writing transistor and the driving signal of the sensing transistor are The same signal.
  • Embodiments of the present disclosure also provide a compensation apparatus for an organic electroluminescence display, the compensation apparatus comprising: a write back determination circuit configured to calculate a data voltage of a current frame according to a sub-pixel to be compensated for a line to be compensated a gain value, determining a writeback voltage of each of the to-be-compensated sub-pixels of the to-be-compensated row in the current frame, the gain value being greater than 1; and a write-back compensation circuit configured to be blank in the current frame Each of the to-be-compensated sub-pixels of the to-be-compensated row is written back to the corresponding sub-pixel to be compensated in the to-be-compensated row, respectively.
  • the display time of the current frame includes a plurality of line scan times
  • the scan time of the blank area includes the last W1 of the plurality of line scan times.
  • Row scan time, the last W1 row scan time includes a charging phase and a compensation writeback phase, wherein W1 is a positive integer
  • the write back compensation circuit is configured to: in the charging phase, the to-be-compensated The sensing line corresponding to each of the to-be-compensated sub-pixels of the row is charged, and the sensing line is used to detect an electrical signal of the sub-pixel to be compensated; in the compensation write-back phase, according to the detected sense
  • the electrical signal of the line calculates a compensation voltage of each of the to-be-compensated sub-pixels of the line to be compensated in an adjacent next frame of the current frame.
  • the write back compensation circuit is further configured to: in the compensation write back phase, each of the to-compensation lines to be compensated The writeback voltages of the subpixels in the current frame are respectively written back to the corresponding subpixels to be compensated in the to-be-compensated row.
  • the writeback determination circuit is configured to: acquire a gain value of each of the to-be-compensated sub-pixels; The pixel multiplies the data voltage of the current frame by the gain value to obtain a writeback voltage of each of the to-be-compensated sub-pixels in the current frame.
  • the sub-pixel to be compensated includes a pixel circuit including a driving transistor, a data writing transistor, a sensing transistor, and a capacitor, and a light emitting device
  • the drive transistor is configured to drive the light emitting device to emit light
  • the data write transistor is configured to write a data voltage to a gate of the drive transistor when turned on
  • the capacitor is configured to store the A data voltage is held at a gate of the drive transistor
  • the sense transistor is configured to charge the sense line corresponding to the sub-pixel to be compensated.
  • the compensation write back phase includes a write back sub-phase and a re-lighting sub-phase
  • the write-back compensation circuit is configured to: in the charging phase Upon completion, resetting the voltage of the sensing line; during the writing back sub-phase, controlling the data writing transistor of each of the to-be-compensated sub-pixels of the line to be compensated to be turned on, Writing back a voltage to write the gate of the driving transistor of each of the to-be-compensated sub-pixels of the line to be compensated; controlling each of the to-compensation lines to be compensated in the re-emission sub-phase
  • the data write transistor of the sub-pixel is turned off, and the sense transistor of each of the sub-pixels to be compensated for controlling the line to be compensated is turned off.
  • the source of the data write transistor is configured to receive the data voltage, and the gate of the data write transistor is connected to the gate line for receiving a first driving signal, a drain of the data writing transistor is connected to a gate of the driving transistor; a source of the driving transistor is connected to a first power terminal, and a drain of the driving transistor is connected to the light emitting device One end of the capacitor is connected to the gate of the driving transistor, the other end of the capacitor is connected to the drain of the driving transistor; the source of the sensing transistor is connected to the drain of the driving transistor, The drain of the sense transistor is connected to the sense line corresponding to the sub-pixel to be compensated, and the gate of the sense transistor is configured to receive a second drive signal.
  • the first driving signal and the second driving signal are the same signal in the sub-pixel to be compensated of the to-be-compensated row.
  • all the to-be-compensated sub-pixels of the to-be-compensated row have the same color.
  • the gain value of the sub-pixel to be compensated for the line to be compensated corresponds to the color corresponding to the sub-pixel to be compensated.
  • An embodiment of the present disclosure further provides an organic electroluminescence display panel comprising the compensation device of any of the above.
  • the embodiment of the present disclosure further provides a display device, comprising the compensation device according to any one of the above.
  • 1A is a flowchart of a compensation method for an OLED according to an embodiment of the present disclosure
  • 1B is a flowchart of another compensation method for an OLED according to an embodiment of the present disclosure.
  • FIG. 2 is a structural diagram of a pixel circuit of a sub-pixel to be compensated according to an embodiment of the present disclosure
  • FIG. 3 is a timing diagram of an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a compensation device for an OLED according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of a display device according to an embodiment of the present disclosure.
  • FIG. 1A is a flowchart of a method for compensating an OLED according to an embodiment of the present disclosure
  • FIG. 1B is a flowchart of another method for compensating an OLED according to an embodiment of the present disclosure.
  • the compensation method includes the following steps:
  • Step S101 determining a writeback voltage of each sub-pixel to be compensated in the current frame according to the data voltage and the gain value of the current frame to be compensated for the sub-pixel to be compensated;
  • Step S102 Write, in the scan time of the blank area of the current frame, the writeback voltage of each pixel to be compensated in the current frame to the corresponding sub-pixel to be compensated in the row to be compensated.
  • any frame time can be equally divided into a plurality of line scan times, and the scan time of the blank area includes the last W1 line scan time of the plurality of line scan times.
  • the blank area the OLED panel with external compensation function is usually divided into a display area and a blank area, and the display area refers to a pixel (unit) and is used for illumination. region. In the blank area, no pixels are set, so that the blank area does not have a light-emitting function.
  • the blank area is mainly used for external compensation, and thus, a driving circuit can be provided in the blank area.
  • part of the scan time of one frame time is allocated to the blank area, and the scan time allocated to the blank area is the scan time of the blank area.
  • the scan time of the blank area is used to detect the electrical signal of the pixel of the line to be compensated and to calculate the compensation voltage.
  • one frame time can be evenly distributed as M shares, each of which is a scan time of one row of pixels
  • the OLED panel can include a row of pixels
  • the a row of pixels can be scanned in a progressive scan manner.
  • the first a part of one frame time is the scanning time of the a row of pixels in the display area
  • the last b part of one frame time is the scanning time of the blank area.
  • a+b M, where a, b, and M are both positive integers, and a is greater than b.
  • one frame time refers to the display time of one frame.
  • the display time of the current frame includes a plurality of line scan times
  • the scan time of the blank area includes the last W1 line scan time of the plurality of line scan times
  • the W1 line scan time includes the charge phase and the compensated write back phase.
  • one frame time can be divided into 2250 copies, the first 2160 copies correspond to the scan time of 2160 rows of pixels in the display area, the last 90 copies are the scan time of the blank area, and the electrical signals for detecting the pixels of the line to be compensated (ie, The charging phase) and the calculation of the compensation voltage (ie, the compensation write back phase).
  • the compensation method may further include:
  • Step S103 charging, in the charging phase, a sensing line corresponding to each sub-pixel to be compensated of the compensation line, where the sensing line is used to detect an electrical signal of the sub-pixel to be compensated;
  • Step S104 In the compensated write back phase, calculate a compensation voltage of each adjacent sub-pixel of the to-be-compensated line in the next frame of the current frame according to the detected electrical signal of the sensing line.
  • step S103 detecting the electrical signal of the sub-pixel to be compensated for the line to be compensated generally includes: detecting a voltage value of the sense line.
  • the sensing line is connected between the driving transistor and the light emitting device in the sub-pixel to be compensated, and a sensing transistor is disposed between the sensing line and the driving transistor.
  • the sensing transistor is turned on.
  • the current flowing to the light emitting device flows to the sensing line, and the integrated circuit chip connected to the sensing line realizes detecting the voltage value of the sensing line. That is, the electrical signal of the pixel of the line to be compensated is obtained.
  • step S103, step S104, and step S102 are each performed in the scan time of the blank area.
  • sensing lines will be described below in conjunction with the pixel circuit structure diagram of the sub-pixel to be compensated shown in FIG. 2 .
  • the sub-pixel to be compensated includes a pixel circuit and a light emitting device OLED.
  • the pixel circuit of the sub-pixel to be compensated may include a driving transistor T1, a data writing transistor T2, a capacitor C, and a sensing transistor T3.
  • the driving transistor T1 is configured to drive the light emitting device OLED to emit light;
  • the data writing transistor T2 is configured to write a data voltage to the gate of the driving transistor T1 when turned on;
  • the capacitor C is configured to store the data voltage and keep it at Driving the gate of the transistor T1;
  • the sensing transistor T3 is configured to charge the sensing line corresponding to the sub-pixel to be compensated.
  • the source of the data write transistor T2 is connected to the data line D to receive the data voltage
  • the gate of the data write transistor T2 is connected to the gate line G1 to receive the first drive signal
  • the drain of the data write transistor T2 is connected to the drive transistor T1.
  • the source of the driving transistor T1 is connected to the first power terminal Vdd
  • the drain of the driving transistor T1 is connected to the first end of the light emitting device OLED
  • the second end of the light emitting device OLED is connected to the second power terminal Vss.
  • One end of the capacitor C is connected to the gate of the driving transistor T1, and the other end of the capacitor C is connected to the drain of the driving transistor T1.
  • the source of the sensing transistor T3 is connected to the drain of the driving transistor T1 and the first end of the light emitting device OLED, that is, the source of the sensing transistor T3 is connected between the drain of the driving transistor T1 and the first end of the light emitting device OLED,
  • the drain of the sense transistor T3 is connected to the sense line S, and the gate of the sense transistor T3 is connected to the control line G2 to receive the second drive signal.
  • the signal g1 is a control signal of the data writing transistor T2, that is, the first driving signal supplied from the gate line G1.
  • Signal g2 is the control signal of sense transistor T3, that is, the second drive signal provided by control line G2.
  • the first driving signal g1 and the second driving signal g2 may be the same signal to facilitate the design of the pixel circuit.
  • the gate line G1 provides an enable signal for the data write transistor T2 to control data writing.
  • the transistor T2 is turned on.
  • the data line D writes a data voltage to the gate of the driving transistor T1, and charges the capacitor C.
  • the integrated circuit chip does not detect the voltage value on the sensing line S.
  • the data writing transistor T2 and the sensing transistor T3 are both in an off state, and the integrated circuit chip does not detect the voltage value on the sensing line S.
  • the driving transistor T1 is turned on, and the light emitting device OLED emits light.
  • the driving transistor T1 and the sensing transistor T3 are both in an on state, and the current originally flowing to the light emitting device OLED through the driving transistor T1 flows to the sensing line S, which is the sensing line S. Charging, that is, the sensing line S is in a charged state at this time, thereby causing the light emitting device OLED to not emit light.
  • the structure of the pixel circuit of the sub-pixel to be compensated shown in FIG. 2 is 2T1C.
  • the structure of the pixel circuit of the sub-pixel to be compensated in the embodiment of the present disclosure is not limited to 2T1C, and the pixel circuit can also be provided with more or less transistors and capacitors.
  • the pixel circuit may also be a 5T1C, 7T1C structure.
  • the driving transistor T1, the data writing transistor T2, and the sensing transistor T3 may each be a thin film transistor or a field effect transistor or other switching devices having the same characteristics.
  • the thin film transistor may include a polysilicon (low temperature polysilicon or high temperature polysilicon) thin film transistor, an amorphous silicon thin film transistor, an oxide thin film transistor, an organic thin film transistor, or the like.
  • the transistor can be divided into an N-type transistor and a P-type transistor.
  • the driving transistor T1, the data writing transistor T2, and the sensing transistor T3 are all N-type transistors (for example, N).
  • the MOS transistor is taken as an example to explain the technical solutions of the present disclosure in detail.
  • the embodiments of the present disclosure are not limited thereto, and those skilled in the art may specifically set the types of the transistors according to actual needs.
  • the source and drain of all or a portion of the transistors in the embodiments of the present disclosure are interchangeable as needed.
  • one sensing line can be set for each pixel, and the sensing line is simultaneously connected with all sub-pixels in one pixel, and the sensing line is only used in each frame time.
  • One of the pixels is turned on, so that the sensing line can be charged by one of the pixels and detect an electrical signal of one of the pixels.
  • Other sub-pixels within the pixel are detected the next time the row of pixels is detected, that is, the sense line can detect and compensate for one color sub-pixel in the pixel at a time.
  • Each pixel in an OLED panel typically includes 4 sub-pixels (red, green, blue, white) or 3 sub-pixels (red, green, blue).
  • the embodiment of the present disclosure is not limited to one sensing line for one pixel.
  • two or more sensing lines may be disposed for each pixel, so that two or Sub-pixels of multiple colors are detected and compensated.
  • the scan time of the blank area includes the last W1 line scan time of the plurality of line scan times.
  • the first W11 line scan time of the blank area scan time is used to detect the electrical signal
  • the W12 line scan time is used to determine the compensation voltage.
  • W11+W12 W1
  • W11 and W12 are integers
  • the length of the first W11 line scan time is greater than the length of the last W12 line scan time, that is, W11 is greater than W12.
  • the scan time of the blank area is 90, the first 70 copies are used to detect the electrical signal, and the last 20 copies are used to determine the compensation voltage.
  • detecting the electrical signal of the sub-pixel to be compensated may include: determining the number of rows of the pixel to be compensated, that is, the line to be compensated, and then controlling the sensing transistor T3 of the row to be compensated when detecting the electrical signal. Pass to achieve the detection of the electrical signal of the sensing line.
  • detecting the electrical signal of the sub-pixel to be compensated further includes: when the sensing transistor T3 that controls the row to be compensated is turned on, the sensing transistor T3 that controls other rows remains off, and realizes telecommunication signal detection for one row of pixels per frame. .
  • the compensated write back phase may include a compensated voltage calculation sub-phase.
  • Step S104 includes: calculating, in the compensation voltage calculation sub-phase, each of the to-be-compensated sub-pixels of the to-be-compensated line in the adjacent next frame of the current frame according to the detected electrical signal of the sensing line Compensation voltage.
  • the electrical signal of each sub-pixel to be compensated according to the detected line to be compensated and the setting signal of the current frame of each sub-pixel to be compensated for the line to be compensated And determining a compensation voltage corresponding to an electrical signal of each sub-pixel to be compensated of the line to be compensated.
  • the electrical signal of each sub-pixel to be compensated of the row to be compensated is the voltage value detected by the sensing line corresponding to each sub-pixel to be compensated in the current frame.
  • the set signal of the to-be-compensated sub-pixel in the current frame is the set voltage of the current frame of the sensing line corresponding to each sub-pixel to be compensated for the line to be compensated, the set voltage and the sub-pixel to be compensated Corresponds to the target brightness of the current frame.
  • the set voltage of the sensing line corresponding to each to-be-compensated sub-pixel of the to-be-compensated row can be obtained according to the data voltage written by each sub-pixel to be compensated of the current frame to be compensated row.
  • the sensing line corresponding to each sub-pixel to be compensated of the row to be compensated may be determined in the following manner.
  • the set voltage of the current frame according to the data voltage written by each pixel to be compensated of the current frame to be compensated row, the target brightness of each pixel to be compensated of the current frame to be compensated row is obtained, according to the current frame to be compensated line
  • the target brightness of each sub-pixel to be compensated and the correspondence between the target brightness and the set voltage of the sensing line are obtained by the set voltage of the sensing line corresponding to each sub-pixel to be compensated of the current frame to be compensated line. It should be noted that the correspondence between the target brightness and the set voltage of the sensing line can be obtained by pre-detection (for example, experimental detection).
  • the compensation voltage calculation sub-phase calculating the sensing line corresponding to each sub-pixel to be compensated in the current frame
  • the detected voltage value is different from the set voltage of the sensing line corresponding to the sub-pixel to be compensated in the current frame, and the compensation voltage is determined according to the difference.
  • the compensation voltage calculation sub-stage after calculating the difference, determining a difference range corresponding to the difference, and calculating a compensation voltage corresponding to the difference according to the correspondence between the difference range and the compensation voltage .
  • the difference range is divided according to a multiple of the set value A, such as (0, A), (A, 2A], ....
  • the compensation voltage corresponding to the first difference range is the voltage when the gray level is 1.
  • the value, the compensation voltage corresponding to the second difference range is the voltage value when the gray level is 2, and so on.
  • the compensation voltage is positive or negative, when the sensing line is at the current
  • the compensation voltage is a positive value
  • the compensation voltage value detected by the sensing line in the current frame is greater than the set voltage
  • the compensation voltage is a negative value.
  • the voltage value is an example, and in practice, it can also be set according to other voltage values.
  • the specific setting manner of the above-mentioned set value A in the present disclosure is not limited.
  • the set value A may be 0.1V, and the difference range may be divided into (0V, 0.1V), (0.1V, 0.2V). ....
  • step S103 the electrical signals of the sub-pixels to be compensated in one row of pixels are simultaneously detected, and when determining the compensation voltage, it is necessary to respectively determine the compensation corresponding to the electrical signals and data voltages of each sub-pixel to be compensated. Voltage.
  • the step S102 may include: in the compensating writeback phase, writing, respectively, the writeback voltage of the to-be-compensated sub-pixel of the to-be-compensated row to the corresponding sub-pixel to be compensated in the row to be compensated.
  • the compensated write back phase may also include a write back subphase and a relighting subphase.
  • the write back sub-phase is to compensate for the first several line scan times of the write-back phase
  • the re-emission sub-phase may be to compensate for the last several line scan times of the write-back phase.
  • the compensation voltage calculation sub-phase can be performed in parallel with the write-back sub-phase and the re-emission sub-phase. That is, the compensation voltage calculation sub-phase may be to compensate for the first several line scan times of the write-back phase and/or several subsequent line scan times.
  • the light emitting device OLED does not emit light.
  • Writing back to the sub-phase takes a short time, usually 2-3 line scan times, so that the dark line lasts for the shortest time.
  • step S102 may include resetting the voltage of the sensing line (ie, the voltage on the sensing line is set to 0) when the charging phase is completed; and controlling the data writing of the sub-pixel to be compensated in the line to be compensated in the writing back sub-phase
  • the input transistor ie, T2 in FIG. 3 is turned on, and the voltage to be written back is written into the gate of each of the driving transistors (ie, T1 in FIG. 3) of the sub-pixel to be compensated to be compensated; in the re-lighting sub-stage
  • the data writing transistor that controls the sub-pixel to be compensated of the line to be compensated is turned off, and the sensing transistor (ie, T3 in FIG. 3) that controls each sub-pixel to be compensated of the line to be compensated is turned off.
  • the voltage of the sensing line is reset, and the sensing line is in the set state, and the sensing line is not charged, so that the sensing line can be normally charged when the next compensation is performed.
  • the driving signal of the data writing transistor ie, the first driving signal
  • the driving signal of the sensing transistor ie, the second driving signal
  • g1 and g2 are respectively a first driving signal and a second driving signal in the sub-pixel to be compensated.
  • the data writing transistor T2 and the sensing transistor T3 are again in an off state, and the voltage of the sensing line is set to 0, so that the sensing line is placed. Bit state, the sense line cannot be charged when set.
  • the data write transistor is turned on to implement writing the write-back voltage to each sub-pixel to be compensated in the row to be compensated.
  • the gate of the driving transistor, at which time the writeback voltage is the writeback voltage calculated in step S101.
  • the write-back sub-phase that is, when the write-back voltage is written, since the sensing transistor T3 is also in an on state, current flows to the sensing line, so that the light-emitting device OLED does not emit light.
  • the data writing transistor T2 and the sensing transistor T3 are turned off, the current passes through the light-emitting device OLED, the light-emitting device OLED is driven to emit light, and the write-back voltage is rewritten.
  • the gate voltage of the driving transistor T1 is increased, and the gate voltage of the driving transistor T1 is increased to cause a voltage difference between the gate and the source of the driving transistor T1 to become large, so that the current of the driving transistor T1 becomes large, and the light emitting device
  • the brightness of the OLED is increased, thereby achieving the function of eliminating dark lines on the display panel.
  • the compensation method provided by the present disclosure further includes: in step S105, in the adjacent next frame time of the current frame, the compensation voltage is to be compensated according to the compensation voltage of each sub-pixel to be compensated for the line to be compensated.
  • the sub-pixel to be compensated is compensated.
  • step S105 may include: calculating a sum of a data voltage and a compensation voltage of a sub-pixel to be compensated of a to-be-compensated row in a next frame of the current frame, respectively, as each pixel of the row to be compensated The final voltage of the next frame adjacent to the current frame. In the next frame time of the current frame, each pixel of the row to be compensated is charged according to the final voltage of each pixel of the row to be compensated.
  • the data voltage of the next next frame of the current frame refers to the data voltage of the data line written to the sub-pixel to be compensated in the adjacent next frame time of the current frame.
  • the data voltage of each pixel to be compensated for the line to be compensated is provided by a driving circuit, and the data voltage is related to the picture displayed by the next frame of the current frame.
  • step S101 may include:
  • Step S1011 Acquire a gain value of the sub-pixel to be compensated for the line to be compensated
  • Step S1012 Multiply each of the to-be-compensated sub-pixels of the to-be-compensated row by the data voltage and the gain value of the current frame to obtain the write-back voltage of the sub-pixel to be compensated in the current frame.
  • the gain value is greater than one.
  • the gain value is a set value, that is, the gain value can be set in advance.
  • step S101 all the sub-pixels to be compensated of the line to be compensated have the same color.
  • the corresponding color of the sub-pixel to be compensated is the color of the light emitted by the sub-pixel to be compensated.
  • a sub-pixel of a certain color also refers to a sub-pixel whose emitted light is a certain color.
  • step S1011 may include: determining a number of line scan times included in a charging phase of a scan time of a blank area of the current frame; and determining a number of line scan times included in the determined charging phase, The gain value of the sub-pixel to be compensated for the line to be compensated is calculated.
  • M is the number of line scan times included in the display time of the current frame
  • N may be the line scan time included in the charging phase of the current frame. number.
  • the M may be equal to 2249, and the row scanning time included in the charging phase of the current frame.
  • step S1011 may further include: determining an identifier corresponding to the sub-pixel to be compensated; determining a gain value of the sub-pixel to be compensated for the line to be compensated according to the identifier corresponding to the sub-pixel to be compensated.
  • the correspondence between the identifier corresponding to the sub-pixel to be compensated and the gain value may be calculated and saved in advance, and the gain value is calculated in the same manner as the above formula.
  • the identifier corresponding to the sub-pixel to be compensated may be used to identify the color of the sub-pixel to be compensated, for example, the red sub-pixel corresponding to the identifier 1, the green sub-pixel corresponding to the identifier 2, and the like.
  • the gain value of the sub-pixel to be compensated of the line to be compensated corresponds to the color corresponding to the sub-pixel to be compensated.
  • the gain value of the sub-pixel to be compensated is determined by the charging efficiency of the sub-pixels of different colors.
  • the charging efficiency of sub-pixels of different colors may be the same or different, so the gain values of sub-pixels of different colors may be the same or different.
  • the red sub-pixel, the green sub-pixel, and the white sub-pixel have the same gain value, and the red sub-pixel and the blue sub-pixel have different gain values.
  • the N corresponding to the red, green, and white sub-pixels ie, the number of line scan times included in the charging phase of the current frame
  • the N corresponding to the blue sub-pixel may be 60.
  • the technical solution provided by the embodiment of the present disclosure has the beneficial effects of: determining, according to the data voltage and the gain value of the current frame of the sub-pixel to be compensated of the line to be compensated, the write-back voltage of the sub-pixel to be compensated of the line to be compensated; In the compensation write back phase of the blank area of the current frame, the write back voltage of the to-be-compensated sub-pixel of the to-be-compensated line is respectively written back to the sub-pixel to be compensated in the line to be compensated; since the current frame is in electrical operation When the signal is detected (the charging phase in the scanning period of the blank area), the sub-pixel to be compensated generates a dark line.
  • the write-back voltage of the gain can be written back to the sub-pixel to be compensated after the completion of the charging phase, so that the sub-pixel to be compensated is made. Re-illuminate, thereby eliminating the dark line.
  • the average brightness of the sub-pixel to be compensated is equivalent to the average brightness when no electrical detection is performed, so that no visible dark lines appear in the eyes of the human eye, thereby eliminating dark lines. .
  • FIG. 4 is a schematic diagram of a compensation device for an organic electroluminescent display according to an embodiment of the present disclosure.
  • the compensation device includes a write back determination circuit 201 and a write back compensation circuit 202.
  • the write back determination circuit 201 is configured to determine the writeback voltage of each sub-pixel to be compensated for the current frame in the current frame according to the data voltage and the gain value of the current frame to be compensated for the pixel to be compensated. For example, the gain value is greater than one.
  • the write back compensation circuit 202 is configured to write, in the scan time of the blank area of the current frame, the write back voltage of each pixel to be compensated in the current frame to the corresponding to-be-compensated field in the line to be compensated, respectively. Pixel.
  • the gain value is a set value, that is, the gain value can be set in advance.
  • the corresponding colors of all the sub-pixels to be compensated of the line to be compensated are the same.
  • the gain value of the sub-pixel to be compensated of the line to be compensated corresponds to the color corresponding to the sub-pixel to be compensated.
  • the display time of the current frame may include a plurality of line scan times, and the scan time of the blank area includes the last W1 line scan time of the plurality of line scan times, and finally the W1 line scan time includes the charging stage and the compensation write back stage.
  • W1 is a positive integer.
  • the write back compensation circuit 202 is configured to: in the charging phase, charge the sensing line corresponding to each sub-pixel to be compensated of the row to be compensated, and the sensing line is used to detect the electrical signal of the sub-pixel to be compensated; In the write back phase, the compensation voltage of each adjacent sub-pixel to be compensated in the next frame of the current frame is calculated according to the detected electrical signal of the sensing line.
  • the write back compensation circuit 202 is further configured to: in the compensated write back phase, write the writeback voltage of each pixel to be compensated in the current frame to the corresponding subpixel to be compensated in the row to be compensated, respectively. .
  • the writeback determination circuit 201 is configured to acquire the gain value of each pixel to be compensated of the row to be compensated; respectively, the data voltage of each pixel to be compensated of the row to be compensated in the current frame Multiplying the gain value to obtain the writeback voltage of the sub-pixel to be compensated in the current frame.
  • the sub-pixel to be compensated includes a pixel circuit including a driving transistor, a data writing transistor, a sensing transistor, and a light emitting device, and a light emitting device.
  • the drive transistor is configured to drive the light emitting device to emit light;
  • the data write transistor is configured to write a data voltage to the gate of the drive transistor when turned on;
  • the capacitor is configured to store the data voltage and hold it in the drive transistor a gate;
  • the sense transistor is configured to charge a sense line corresponding to the sub-pixel to be compensated.
  • the source of the data write transistor is configured to receive a data voltage
  • the gate of the data write transistor is connected to the gate line to receive the first drive signal
  • the drain of the data write transistor is coupled to the gate of the drive transistor
  • the source is connected to the first power terminal
  • the drain of the driving transistor is connected to the first end of the light emitting device
  • one end of the capacitor is connected to the gate of the driving transistor, and the other end of the capacitor is connected to the drain of the driving transistor
  • the source of the sensing transistor is connected and driven
  • the drain of the transistor, the drain of the sense transistor is connected to a sense line corresponding to the sub-pixel to be compensated, and the gate of the sense transistor is configured to receive the second drive signal.
  • the first driving signal and the second driving signal are the same signal to facilitate the design of the pixel circuit.
  • the compensated write back phase can include a write back subphase and a relighting subphase.
  • the write back compensation circuit 202 is configured to: reset the voltage of the sensing line when the charging phase is completed; and control the data writing transistor of each of the to-be-compensated sub-pixels to be compensated to be turned on during the writing back sub-phase Writing a writeback voltage to the gate of the driving transistor of each sub-pixel to be compensated in the row to be compensated; in the re-emission sub-phase, the data writing transistor of each sub-pixel to be compensated for controlling the row to be compensated is turned off, The sensing transistor of each sub-pixel to be compensated that controls the line to be compensated is turned off.
  • the write back determination circuit 201 is further configured to perform step S101 in the above compensation method
  • the write back compensation circuit 202 is further configured to perform step S102 in the above compensation method, thereby, regarding the write back determination circuit 201 and writing
  • the specific function of the back compensation circuit 202 can be referred to the related description in the embodiment of the above compensation method.
  • the write back determination circuit 201 may be integrated in the driving circuit of the OLED panel, or may be implemented by using a separate integrated circuit chip.
  • the write back compensation circuit 202 may include a data signal generation circuit, an integrated circuit chip, a sense line, and the like in a drive circuit of the OLED panel.
  • the compensation device and the above-mentioned compensation method provided by the embodiments of the present disclosure are based on the same inventive concept, the method steps of the specific circuit in the compensation device can be referred to the relevant parts of the compensation method embodiment, and details are not described herein again.
  • An embodiment of the present disclosure further provides an organic electroluminescent display (OLED) panel, the OLED panel comprising the compensation device according to any of the above. Since the OLED panel includes the compensation device shown in FIG. 4, the same technical effect as the compensation device can be achieved, that is, the dark line of the display panel can be eliminated, and the uniformity of the display of the display panel can be improved.
  • OLED organic electroluminescent display
  • FIG. 5 is a schematic diagram of a display device according to an embodiment of the present disclosure.
  • the embodiment of the present disclosure further provides a display device comprising the OLED panel or compensation device 101 of any of the above.
  • the display device 100 may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like. Since the display device 100 includes the foregoing OLED panel or compensation device 101, the same technical effect as the OLED panel or the compensation device 101 can be achieved, that is, the dark line of the display panel can be eliminated, and the uniformity of display of the display panel can be improved.

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Abstract

一种用于有机电致发光显示器的补偿方法和补偿装置、显示设备。补偿方法包括：根据待补偿行的待补偿子像素在当前帧的数据电压和增益值，确定所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压，所述增益值大于1(S101)；在所述当前帧的空白区的扫描时间内，将所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压分别写回到所述待补偿行中对应的待补偿子像素(S102)。该补偿方法能够消除暗线，提高显示的均一性。

Description

有机电致发光显示器的补偿方法和补偿装置、显示设备
本申请要求于2017年05月12日递交的中国专利申请第201710333919.6号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开的实施例涉及一种用于有机电致发光显示器(Organic Light-Emitting Display，OLED)的补偿方法和补偿装置、显示设备。
背景技术
有源矩阵有机电致发光显示器(Active-Matrix Organic Light-Emitting Display，AMOLED)作为一种电流型发光器件已越来越多地被应用于高性能显示中。由于它自发光的特性，与液晶显示器(Liquid Crystal Display，LCD)相比，AMOLED具有高对比度、超轻薄、可弯曲等诸多优点。
AMOLED中的薄膜晶体管(Thin Film Transistor，TFT)在长时间的加压和高温条件下，其阈值电压会出现漂移。由于显示画面不同，写入的数据电压不同，AMOLED面板各部分的驱动薄膜晶体管的阈值漂移量不同，会造成显示亮度差异，由于这种差异与当前帧画面之前显示的图像有关，因此常呈现为残影现象，也就是通常所说的残像。
目前，为了解决残像问题，除了工艺的改善外，还有一种就是补偿技术。现有一种通过驱动芯片检测像素的电学特性然后进行补偿的方法。在这种补偿方法中，驱动芯片的感应电路将像素的驱动薄膜晶体管的电学信号抽取出来，借助集成电路芯片确定需要补偿的补偿电压值，反馈给驱动芯片从而实现补偿。
为了实现电学信号检测，通常在AMOLED中会将一帧画面的最后若干行扫描时间作为空白(blank)区的扫描时间，由于空白区并没有设置像素，因此，可以在空白区的扫描时间内检测电学信号以及确定补偿电压值。在每一帧画面显示时间内，会对某一行像素的驱动薄膜晶体管的电学信号进行检测。为了对驱动薄膜晶体管的电学信号进行检测，通常在驱动薄膜晶体管和OLED器件之间连接一感测(sense)线，并在感测线和驱动薄膜晶体管之间设置感测薄膜晶 体管。在空白区的扫描时间内，该感测薄膜晶体管开启，此时，流向OLED器件的电流会流向感测线，从而导致OLED器件会变暗，即该行像素出现暗线。
发明内容
本公开至少一实施例提供一种用于有机电致发光显示器(OLED)的补偿方法，所述补偿方法包括：根据待补偿行的待补偿子像素在当前帧的数据电压和增益值，确定所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压，所述增益值大于1；在所述当前帧的空白区的扫描时间内，将所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压分别写回到所述待补偿行中对应的待补偿子像素。
例如，在本公开实施例的一种补偿方法的实现方式中，所述当前帧的显示时间包括多个行扫描时间，所述空白区的扫描时间包括所述多个行扫描时间中的最后W1个行扫描时间，所述最后W1个行扫描时间包括充电阶段和补偿写回阶段，其中，W1为正整数，所述补偿方法包括：在所述充电阶段，对所述待补偿行的每个所述待补偿子像素对应的感测线充电，所述感测线用于检测所述待补偿子像素的电学信号；在所述补偿写回阶段，根据检测到的所述感测线的电学信号计算所述待补偿行的每个所述待补偿子像素在所述当前帧的相邻下一帧的补偿电压。
例如，在本公开实施例的另一种补偿方法的实现方式中，所述补偿方法还包括：在所述补偿写回阶段，将所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压分别写回到所述待补偿行中对应的待补偿子像素。
例如，在本公开实施例的另一种补偿方法的实现方式中，所述根据待补偿行的待补偿子像素在当前帧的数据电压和增益值，确定所述待补偿行的每个所述待补偿子像素在当前帧的写回电压，包括：获取每个所述待补偿子像素的增益值；分别将每个所述待补偿子像素在所述当前帧的数据电压和所述增益值相乘，以得到每个所述待补偿子像素在所述当前帧的写回电压。
例如，在本公开实施例的另一种补偿方法的实现方式中，所述增益值采用如下公式确定：A＝M/(M-N)，A为所述待补偿行的待补偿子像素的增益值，M为所述当前帧的显示时间所包括的行扫描时间的个数，N为所述充电阶段所包括的行扫描时间的个数。
例如，在本公开实施例的另一种补偿方法的实现方式中，所述待补偿行的 所有所述待补偿子像素对应的颜色相同。
例如，在本公开实施例的另一种补偿方法的实现方式中，所述待补偿行的待补偿子像素的增益值与所述待补偿子像素对应的颜色相对应。
例如，在本公开实施例的另一种补偿方法的实现方式中，所述待补偿子像素包括像素电路，所述像素电路包括驱动晶体管、数据写入晶体管和感测晶体管，所述补偿写回阶段包括写回子阶段和重新发光子阶段，所述将所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压分别写回到所述待补偿行中对应的待补偿子像素，包括：在所述充电阶段完成时，将所述感测线的电压复位；在所述写回子阶段内，控制所述待补偿行的每个所述待补偿子像素的所述数据写入晶体管导通，将所述写回电压写入所述待补偿行的每个所述待补偿子像素的所述驱动晶体管的栅极；在所述重新发光子阶段内，控制所述待补偿行的每个所述待补偿子像素的数据写入晶体管断开，控制所述待补偿行的每个所述待补偿子像素的所述感测晶体管断开。
例如，在本公开实施例的另一种补偿方法的实现方式中，在所述待补偿行的待补偿子像素内，所述数据写入晶体管的驱动信号与所述感测晶体管的驱动信号为相同的信号。
本公开实施例还提供了一种用于有机电致发光显示器的补偿装置，所述补偿装置包括：写回确定电路，被配置为根据待补偿行的待补偿子像素在当前帧的数据电压和增益值，确定所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压，所述增益值大于1；写回补偿电路，被配置为在所述当前帧的空白区的扫描时间内，将所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压分别写回到所述待补偿行中对应的待补偿子像素。
例如，在本公开实施例的一种补偿装置的实现方式中，所述当前帧的显示时间包括多个行扫描时间，所述空白区的扫描时间包括所述多个行扫描时间中的最后W1个行扫描时间，所述最后W1个行扫描时间包括充电阶段和补偿写回阶段，其中，W1为正整数，所述写回补偿电路被配置为：在所述充电阶段，对所述待补偿行的每个所述待补偿子像素对应的感测线充电，所述感测线用于检测所述待补偿子像素的电学信号；在所述补偿写回阶段，根据检测到的所述感测线的电学信号计算所述待补偿行的每个所述待补偿子像素在所述当前帧的相邻下一帧的补偿电压。
例如，在本公开实施例的另一种补偿装置的实现方式中，所述写回补偿电 路还被配置为：在所述补偿写回阶段，将所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压分别写回到所述待补偿行中对应的待补偿子像素。
例如，在本公开实施例的另一种补偿装置的实现方式中，所述写回确定电路被配置为：获取每个所述待补偿子像素的增益值；分别将每个所述待补偿子像素在所述当前帧的数据电压和所述增益值相乘，以得到每个所述待补偿子像素在所述当前帧的写回电压。
例如，在本公开实施例的另一种补偿装置的实现方式中，所述增益值采用如下公式确定：A＝M/(M-N)，A为所述待补偿行的待补偿子像素的增益值，M为所述当前帧的显示时间所包括的行扫描时间的个数，N为所述充电阶段所包括的行扫描时间的个数。
例如，在本公开实施例的另一种补偿装置的实现方式中，所述待补偿子像素包括像素电路和发光器件，所述像素电路包括驱动晶体管、数据写入晶体管、感测晶体管和电容，所述驱动晶体管被配置为驱动所述发光器件发光；所述数据写入晶体管被配置为在导通时将数据电压写入到所述驱动晶体管的栅极；所述电容被配置为存储所述数据电压并将其保持在所述驱动晶体管的栅极；所述感测晶体管被配置为对与所述待补偿子像素对应的所述感测线充电。
例如，在本公开实施例的另一种补偿装置的实现方式中，所述补偿写回阶段包括写回子阶段和重新发光子阶段，所述写回补偿电路被配置为：在所述充电阶段完成时，将所述感测线的电压复位；在所述写回子阶段内，控制所述待补偿行的每个所述待补偿子像素的所述数据写入晶体管导通，将所述写回电压写入所述待补偿行的每个所述待补偿子像素的所述驱动晶体管的栅极；在所述重新发光子阶段内，控制所述待补偿行的每个所述待补偿子像素的数据写入晶体管断开，控制所述待补偿行的每个所述待补偿子像素的所述感测晶体管断开。
例如，在本公开实施例的另一种补偿装置的实现方式中，所述数据写入晶体管的源极被配置为接收所述数据电压，所述数据写入晶体管的栅极连接栅线以接收第一驱动信号，所述数据写入晶体管的漏极连接所述驱动晶体管的栅极；所述驱动晶体管的源极连接第一电源端，所述驱动晶体管的漏极连接所述发光器件的第一端；所述电容的一端连接所述驱动晶体管的栅极，所述电容的另一端连接所述驱动晶体管的漏极；所述感测晶体管的源极连接所述驱动晶体管的漏极，所述感测晶体管的漏极连接与所述待补偿子像素对应的所述感测 线，所述感测晶体管的栅极被配置为接收第二驱动信号。
例如，在本公开实施例的另一种补偿装置的实现方式中，在所述待补偿行的待补偿子像素内，所述第一驱动信号与所述第二驱动信号为相同的信号。
例如，在本公开实施例的另一种补偿装置的实现方式中，所述待补偿行的所有所述待补偿子像素对应的颜色相同。
例如，在本公开实施例的另一种补偿装置的实现方式中，所述待补偿行的待补偿子像素的增益值与所述待补偿子像素对应的颜色相对应。
本公开实施例还提供了一种有机电致发光显示器面板，所述有机电致发光显示器面板包括上述任一项所述的补偿装置。
本公开实施例还提供了一种显示设备，所述显示设备包括上述任一项所述的补偿装置。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1A是本公开一实施例提供的一种用于OLED的补偿方法的流程图；
图1B是本公开一实施例提供的另一种用于OLED的补偿方法的流程图；
图2是本公开一实施例提供的一种待补偿子像素的像素电路的结构图；
图3是本公开一实施例提供的一种时序图；
图4是本公开一实施例提供的一种用于OLED的补偿装置的示意图；
图5是本公开一实施例提供的一种显示设备的示意图。
具体实施方式
为了使得本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。
图1A是本公开一实施例提供的一种用于OLED的补偿方法的流程图，图1B是本公开一实施例提供的另一种用于OLED的补偿方法的流程图。
例如，参见图1A，该补偿方法包括以下步骤：
步骤S101：根据待补偿行的待补偿子像素在当前帧的数据电压和增益值，确定待补偿行的每个待补偿子像素在当前帧的写回电压；
步骤S102：在当前帧的空白区的扫描时间内，将待补偿行的每个待补偿子像素在当前帧的写回电压分别写回到待补偿行中对应的待补偿子像素。
例如，任一帧时间可以平均分为多个行扫描时间，空白区的扫描时间包括多个行扫描时间中的最后W1个行扫描时间。为了便于理解，下面先对空白区的含义进行简单说明：具有外部补偿功能的OLED面板通常分为显示区和空白(blank)区，显示区是指设置有像素(单元)，且用于发光的区域。而空白区内则没有设置像素，从而空白区不具有发光功能。空白区主要用于进行外部补偿，因而，在空白区内可以设置驱动电路。虽然空白区内没有设置像素，但为了能够进行外部补偿，一帧时间的部分扫描时间会被分配给空白区，分配给空白区的扫描时间即为空白区的扫描时间。空白区的扫描时间用于检测待补偿行的像素的电学信号以及计算补偿电压。
例如，一帧时间可以平均分配为M份，每一份为一行像素的扫描时间，OLED面板可以包括a行像素，且a行像素可以按逐行扫描的方式进行扫描。一帧时间中的前a份为显示区中的a行像素的扫描时间，一帧时间中的后b份为空白区的扫描时间。a+b＝M，其中，a、b和M均为正整数，且a大于b。需要说明的是，一帧时间是指一帧画面的显示时间。
例如，当前帧的显示时间包括多个行扫描时间，空白区的扫描时间包括多个行扫描时间中的最后W1个行扫描时间，最后W1个行扫描时间包括充电阶段和补偿写回阶段。例如，一帧时间可以分为2250份，前2160份对应显示区中2160行像素的扫描时间，后90份为空白区的扫描时间，且用于检测待补偿行的像素的电学信号(也即充电阶段)以及计算补偿电压(也即补偿写回阶段)。
例如，如图1B所示，在一些示例中，该补偿方法还可以包括：
步骤S103：在充电阶段，对待补偿行的每个待补偿子像素对应的感测线充电，所述感测线用于检测待补偿子像素的电学信号；
步骤S104：在补偿写回阶段，根据检测到的感测线的电学信号计算待补偿行的每个待补偿子像素在当前帧的相邻下一帧的补偿电压。
例如，在本公开实施例中，在步骤S103中，检测待补偿行的待补偿子像素的电学信号通常包括：检测感测(sense)线的电压值。
例如，感测线连接在待补偿子像素中驱动晶体管和发光器件之间，感测线和驱动晶体管之间设置有感测晶体管。在空白区的扫描时间内，该感测晶体管开启，此时，原本流向发光器件的电流会流向感测线，与该感测线连接的集成 电路芯片实现对感测线的电压值进行检测，即获取待补偿行的像素的电学信号。
需要说明的是，图1A和图1B中的各步骤的顺序并不表示执行补偿方法时的操作顺序。例如，步骤S103、步骤S104和步骤S102均在空白区的扫描时间内执行。
下面结合图2所示的待补偿子像素的像素电路结构图，对感测线的布置方式进行说明。
例如，如图2所示，待补偿子像素包括像素电路和发光器件OLED。待补偿子像素的像素电路可以包括驱动晶体管T1、数据写入晶体管T2、电容C和感测晶体管T3。驱动晶体管T1被配置为驱动发光器件OLED发光；数据写入晶体管T2被配置为在导通时将数据电压写入到驱动晶体管T1的栅极；电容C被配置为存储数据电压并将其保持在驱动晶体管T1的栅极；感测晶体管T3被配置为对与待补偿子像素对应的感测线充电。
例如，数据写入晶体管T2的源极连接数据线D以接收数据电压，数据写入晶体管T2的栅极连接栅线G1以接收第一驱动信号，数据写入晶体管T2的漏极连接驱动晶体管T1的栅极。驱动晶体管T1的源极连接第一电源端Vdd，驱动晶体管T1的漏极连接发光器件OLED的第一端，发光器件OLED的第二端连接第二电源端Vss。电容C的一端连接驱动晶体管T1的栅极，电容C的另一端连接驱动晶体管T1的漏极。感测晶体管T3的源极连接驱动晶体管T1的漏极和发光器件OLED的第一端，即感测晶体管T3的源极连接在驱动晶体管T1的漏极和发光器件OLED的第一端之间，感测晶体管T3的漏极与感测线S连接，感测晶体管T3的栅极与控制线G2连接以接收第二驱动信号。
图3是图2的像素电路结构的时序图。信号g1是数据写入晶体管T2的控制信号，也即栅线G1提供的第一驱动信号。信号g2是感测晶体管T3的控制信号，也即控制线G2提供的第二驱动信号。如图3所示，在本公开实施例提供的待补偿子像素中，第一驱动信号g1和第二驱动信号g2可以为相同的信号，以便于像素电路的设计。
例如，参见图3，在待补偿行的像素的扫描时间(即待补偿行的像素的数据写入阶段)t1内，栅线G1为数据写入晶体管T2提供一开启信号，以控制数据写入晶体管T2导通，此时，数据线D向驱动晶体管T1的栅极写入数据电压，并对电容C充电。在数据写入阶段t1内，由于驱动晶体管T1未导通， 所以集成电路芯片没有检测到感测线S上的电压值。在发光阶段，数据写入晶体管T2和感测晶体管T3均处于断开状态，集成电路芯片没有检测到感测线S上的电压值，此时，驱动晶体管T1导通，发光器件OLED发光。在空白区的扫描时间内的充电阶段t2内，驱动晶体管T1和感测晶体管T3均处于导通状态，原本通过驱动晶体管T1流向发光器件OLED的电流会流向感测线S，为感测线S充电，即此时感测线S处于充电状态，从而导致发光器件OLED不发光。
图2所示的待补偿子像素的像素电路的结构为2T1C，然而本公开实施例中待补偿子像素的像素电路的结构不限于2T1C，像素电路还可以设置更多或者更少的晶体管和电容，例如，像素电路还可以是5T1C、7T1C结构。
例如，在本公开实施例中，驱动晶体管T1、数据写入晶体管T2和感测晶体管T3均可以为薄膜晶体管或场效应晶体管或其他特性相同的开关器件。薄膜晶体管可以包括多晶硅(低温多晶硅或高温多晶硅)薄膜晶体管、非晶硅薄膜晶体管、氧化物薄膜晶体管或有机薄膜晶体管等。
例如，按照晶体管的特性，晶体管可以分为N型晶体管和P型晶体管，本公开的实施例中，以驱动晶体管T1、数据写入晶体管T2和感测晶体管T3均为N型晶体管(例如，N型MOS晶体管)为例详细阐述了本公开的技术方案，然而本公开的实施例不限于此，本领域技术人员还可以根据实际需要具体设置各晶体管的类型。在本公开的实施例中，本公开实施例中全部或部分晶体管的源极和漏极根据需要是可以互换的。
需要说明的是，在OLED面板上，可以为每个像素设置一根感测线，这一根感测线同时与一个像素内的所有子像素连接，每一帧时间内，感测线只与像素中的一个子像素导通，从而感测线可以通过像素中的一个子像素进行充电，并检测像素中的一个子像素的电学信号。该像素内的其他子像素，在下一次检测到该行像素时进行检测，也就是说，感测线可以每次检测像素中的一种颜色子像素，并对其进行补偿。OLED面板中每个像素通常包括4个子像素(红、绿、蓝、白)或3个子像素(红、绿、蓝)。
需要说明的是，本公开实施例并不限于一个像素设置一根感测线，例如，也可以为每个像素设置两根或多根感测线，从而使得可以同时对像素内的两个或多个颜色的子像素进行检测和补偿处理。
例如，空白区的扫描时间包括多个行扫描时间中的最后W1个行扫描时间。 在进行电学信号检测时，空白区的扫描时间的前W11个行扫描时间用于检测电学信号，后W12个行扫描时间用于确定补偿电压。例如，W11+W12＝W1，且W11、W12均为整数，且前W11个行扫描时间的长度大于后W12个行扫描时间的长度，即W11大于W12。
例如，空白区的扫描时间为90份，则前70份用于检测电学信号，后20份用于确定补偿电压。
例如，在步骤S103中，检测待补偿子像素的电学信号可以包括：在检测该电学信号时，先确定待补偿像素所在行数，即待补偿行，然后控制待补偿行的感测晶体管T3导通，以实现检测感测线的电学信号。
例如，检测待补偿子像素的电学信号还包括：在控制待补偿行的感测晶体管T3导通时，控制其他行的感测晶体管T3保持断开，实现每一帧对一行像素进行电信信号检测。
例如，在本公开实施例中，补偿写回阶段可以包括补偿电压计算子阶段。步骤S104包括：在补偿电压计算子阶段内，根据检测到的所述感测线的电学信号计算所述待补偿行的每个所述待补偿子像素在所述当前帧的相邻下一帧的补偿电压。例如，在一些示例中，在补偿电压计算子阶段内，根据检测到的待补偿行的每个待补偿子像素的电学信号以及待补偿行的每个待补偿子像素在当前帧的设定信号，确定与待补偿行的每个待补偿子像素的电学信号对应的补偿电压。
例如，待补偿行的每个待补偿子像素的电学信号为待补偿行的每个待补偿子像素对应的感测线在当前帧检测到的电压值。待补偿行的每个待补偿子像素在当前帧的设定信号为待补偿行的每个待补偿子像素对应的感测线在当前帧的设定电压，该设定电压与待补偿子像素在当前帧的目标亮度对应。该待补偿行的每个待补偿子像素对应的感测线在当前帧的设定电压，可以根据当前帧待补偿行的每个待补偿子像素写入的数据电压得到。
例如，由于当前帧待补偿行的每个待补偿子像素写入的数据电压与其在当前帧的目标亮度对应，因此可以采用如下方式确定待补偿行的每个待补偿子像素对应的感测线在当前帧的设定电压：根据当前帧待补偿行的每个待补偿子像素写入的数据电压得到当前帧待补偿行的每个待补偿子像素的目标亮度，根据当前帧待补偿行的每个待补偿子像素的目标亮度、以及目标亮度与感测线的设定电压之间的对应关系得到当前帧待补偿行的每个待补偿子像素对应的感测 线的设定电压。需要说明的是，目标亮度与感测线的设定电压之间的对应关系可以通过预先检测(例如，实验检测)得到。
例如，在确定当前帧待补偿行的每个待补偿子像素对应的感测线的设定电压后，在补偿电压计算子阶段内，计算每个待补偿子像素对应的感测线在当前帧检测到的电压值与该待补偿子像素对应的感测线在当前帧的设定电压的差值，根据该差值确定补偿电压。例如，在一些示例中，在补偿电压计算子阶段内，在计算出差值后，确定该差值对应的差值范围，根据差值范围与补偿电压的对应关系，计算差值对应的补偿电压。
例如，该差值范围按照设定值A的倍数进行划分，比如(0，A]，(A，2A]，……。第一个差值范围对应的补偿电压为灰阶为1时的电压值，第二个差值范围对应的补偿电压为灰阶为2时的电压值，依次类推。根据上述对应关系确定出补偿电压的绝对值后，判断补偿电压正负，当感测线在当前帧检测到的电压值小于设定电压时，该补偿电压为正值，当感测线在当前帧检测到的电压值大于设定电压时，该补偿电压为负值。上述各个差值范围对应的电压值为举例，实际中还可以按照其他电压值进行设置。
需要说明的是，本公开上述设定值A具体设置方式不作限制，例如，设定值A可以为0.1V，则差值范围划分可以为(0V，0.1V]，(0.1V，0.2V]……。
例如，在步骤S103中，同时检测了一行像素中的待补偿子像素的电学信号，而在确定补偿电压时，需要针对每一个待补偿子像素的电学信号和数据电压分别确定与之对应的补偿电压。
例如，步骤S102可以包括：在补偿写回阶段，将待补偿行的每个待补偿子像素在当前帧的写回电压分别写回到待补偿行中对应的待补偿子像素。
例如，补偿写回阶段还可以包括写回子阶段和重新发光子阶段。例如，写回子阶段为补偿写回阶段的前若干个行扫描时间，重新发光子阶段可以为补偿写回阶段的后若干个行扫描时间。
需要说明的是，补偿电压计算子阶段可以与写回子阶段、重新发光子阶段并行进行。也就是说，补偿电压计算子阶段可以为补偿写回阶段的前若干个行扫描时间和/或后若干个行扫描时间。
例如，如图2所示，在写回子阶段，由于感测晶体管导通，从而感测线与驱动晶体管导通，所以发光器件OLED不发光。写回子阶段所占时间较短，通常为2-3个行扫描时间，从而使暗线的时间持续最短。
例如，步骤S102可以包括：在充电阶段完成时，将感测线的电压复位(即感测线上的电压置0)；在写回子阶段，控制待补偿行的待补偿子像素的数据写入晶体管(即图3中的T2)导通，将待写回电压写入待补偿行的每个待补偿子像素的驱动晶体管(即图3中的T1)的栅极；在重新发光子阶段，控制待补偿行的待补偿子像素的数据写入晶体管断开，控制待补偿行的每个待补偿子像素的感测晶体管(即图3中的T3)断开。
例如，在充电阶段完成时，将感测线的电压复位，同时该感测线处于置位状态，感测线不会充电，从而使得下一次进行补偿时，感测线能够正常充电。
例如，在待补偿行的待补偿子像素内，数据写入晶体管的驱动信号(即第一驱动信号)与感测晶体管的驱动信号(即第二驱动信号)为相同的信号，便于像素电路的设计。可以参见图3，g1和g2分别为待补偿子像素内的第一驱动信号与和第二驱动信号。
例如，如图2和图3所示，在充电阶段t2之后，数据写入晶体管T2和感测晶体管T3重新处于断开状态，且将感测线的电压置为0，使感测线处于置位状态，置位状态下感测线无法充电。在当前帧的补偿写回阶段的前若干个行扫描时间(即写回子阶段)t3内，数据写入晶体管导通，以实现将写回电压写入待补偿行的每个待补偿子像素的驱动晶体管的栅极，此时的写回电压为步骤S101中计算出的写回电压。在写回子阶段，即在写入写回电压时，由于感测晶体管T3也处于导通状态，电流流向感测线，所以发光器件OLED不发光。当写回电压写入完成后，即在重新发光子阶段内，数据写入晶体管T2和感测晶体管T3断开，电流经过发光器件OLED，驱动发光器件OLED发光，且重新写入的写回电压使得驱动晶体管T1的栅极电压增大，驱动晶体管T1的栅极电压增大造成驱动晶体管T1的栅极和源极之间的压差变大，从而使得驱动晶体管T1的电流变大，发光器件OLED发光亮度增加，从而实现消除显示面板上的暗线的功能。
例如，如图3所示，在本公开实施例中，写回子阶段t3和充电阶段t2之间可以存在一个短暂的间隔时间，例如可以是1-2个行扫描时间，该短暂的间隔时间可以用于切换感测线的状态，避免直接写入写回电压时，由于感测晶体管T3导通而导致感测线继续处于充电状态。
例如，如图1B所示，本公开提供的补偿方法还包括：步骤S105、在当前帧的相邻下一帧时间中，根据待补偿行的每个待补偿子像素的补偿电压对待补 偿行的待补偿子像素进行补偿。
例如，在本公开实施例中，步骤S105可以包括：计算待补偿行的待补偿子像素在当前帧的相邻下一帧的数据电压和补偿电压的和，分别作为待补偿行的每个像素在当前帧的相邻下一帧的最终电压。在当前帧的相邻下一帧时间中，根据待补偿行的每个像素的最终电压，对待补偿行的每个像素进行充电。
例如，本公开中，当前帧的相邻下一帧的数据电压是指在当前帧的相邻下一帧时间中数据线写入待补偿子像素的数据电压。当前帧的相邻下一帧时间中，待补偿行的每个待补偿子像素的数据电压由驱动电路提供，该数据电压与当前帧的相邻下一帧所显示的画面相关。
例如，步骤S101可以包括：
步骤S1011：获取待补偿行的待补偿子像素的增益值；
步骤S1012：分别将待补偿行的每个待补偿子像素在当前帧的数据电压和增益值相乘，以得到待补偿行的待补偿子像素在当前帧的写回电压。
例如，在步骤S101中，增益值大于1。增益值为设定值，也就是说，增益值可以预先设定。
例如，在步骤S101中，待补偿行的所有待补偿子像素对应的颜色相同。待补偿子像素的对应的颜色为待补偿子像素发出的光的颜色，为了便于描述，在本公开下面的描述中，某种颜色的子像素也是指发出的光为某种颜色的子像素。
例如，在一些示例中，步骤S1011可以包括：确定当前帧的空白区的扫描时间的充电阶段所包括的行扫描时间的个数；根据确定出的充电阶段所包括的行扫描时间的个数，计算出待补偿行的待补偿子像素的增益值。
例如，待补偿行的待补偿子像素的增益值可以采用如下公式确定：A＝M/(M-N)，A为待补偿行的待补偿子像素的增益值，M为总行数，总行数等于任一帧时间所包括的行扫描时间的个数，也就是说，M为当前帧的显示时间所包括的行扫描时间的个数，N可以为当前帧的充电阶段所包括的行扫描时间的个数。
例如，由于在驱动电路中，像素的行数通常从0开始编号，因此，在上述公式中，若总行数为2250，则这里的M可以等于2249，当前帧的充电阶段所包括的行扫描时间的个数为70，则这里的N可以为69，则待补偿行的增益值为A＝2249/(2249-69)。
例如，在另一些示例中，步骤S1011也可以包括：确定待补偿子像素对应的标识；根据待补偿子像素对应的标识确定待补偿行的待补偿子像素的增益值。
例如，待补偿子像素对应的标识和增益值的对应关系可以预先计算并保存，增益值的计算方式与上述公式相同。
例如，待补偿子像素对应的标识可以用于标识待补偿子像素的颜色，例如红色子像素对应标识1，绿色子像素对应标识2等等。由此，待补偿行的待补偿子像素的增益值与待补偿子像素对应的颜色相对应。
例如，待补偿子像素的增益值由不同颜色的子像素的充电效率决定。不同颜色的子像素的充电效率可能相同，也可能不同，所以不同颜色的子像素的增益值可能相同，也可能不同。
例如，红色子像素、绿色子像素和白色子像素的增益值相同，红色子像素和蓝色子像素的增益值不同。在一些示例中，红色、绿色、白色子像素对应的N(即当前帧的充电阶段所包括的行扫描时间的个数)可以为70，而蓝色子像素对应的N可以为60。
本公开实施例提供的技术方案带来的有益效果是：根据待补偿行的待补偿子像素在当前帧的数据电压和增益值，确定待补偿行的待补偿子像素的写回电压；然后在当前帧的空白区的扫描时间内的补偿写回阶段，将待补偿行的待补偿子像素在当前帧的写回电压分别写回到待补偿行的待补偿子像素；由于当前帧在进行电学信号检测时(空白区的扫描时间内的充电阶段)待补偿子像素会产生暗线，因此，可以在充电阶段完成之后将经过增益的写回电压写回待补偿子像素，以使待补偿子像素重新发光，由此消除该暗线。在充电阶段(电学信号检测时间)和充电阶段之后的时间内，该待补偿子像素平均亮度与没有进行电学检测时的平均亮度相当，因而在人眼看来不会出现明显暗线，从而消除了暗线。
图4是本公开一实施例提供的一种用于有机电致发光显示器的补偿装置的示意图。参见图4，该补偿装置包括：写回确定电路201和写回补偿电路202。写回确定电路201被配置为根据待补偿行的待补偿子像素在当前帧的数据电压和增益值，确定待补偿行的每个待补偿子像素在当前帧的写回电压。例如，增益值大于1。写回补偿电路202被配置为在当前帧的空白区的扫描时间内，将待补偿行的每个待补偿子像素在当前帧的写回电压分别写回到待补偿行中对 应的待补偿子像素。
例如，增益值为设定值，即增益值可以预先设定。
例如，待补偿行的所有待补偿子像素的对应的颜色相同。待补偿行的待补偿子像素的增益值与待补偿子像素对应的颜色相对应。
例如，当前帧的显示时间可以包括多个行扫描时间，空白区的扫描时间包括多个行扫描时间中的最后W1个行扫描时间，最后W1个行扫描时间包括充电阶段和补偿写回阶段，W1为正整数。
例如，写回补偿电路202被配置为：在充电阶段，对待补偿行的每个待补偿子像素对应的感测线充电，感测线用于检测所述待补偿子像素的电学信号；在补偿写回阶段，根据检测到的感测线的电学信号计算待补偿行的每个待补偿子像素在当前帧的相邻下一帧的补偿电压。
例如，写回补偿电路202还被配置为：在补偿写回阶段，将待补偿行的每个待补偿子像素在当前帧的写回电压分别写回到待补偿行中对应的待补偿子像素。
例如，在本公开实施例中，写回确定电路201被配置为获取待补偿行的每个待补偿子像素的增益值；分别将待补偿行的每个待补偿子像素在当前帧的数据电压和增益值相乘，以得到待补偿行的待补偿子像素在当前帧的写回电压。
例如，在本公开实施例中，增益值采用如下公式确定：A＝M/(M-N)，A为待补偿行的待补偿子像素的增益值，M为当前帧的显示时间所包括的行扫描时间的个数，N为空白区的扫描时间中的充电阶段所包括的行扫描时间的个数。
例如，待补偿子像素包括像素电路和发光器件，所述像素电路包括驱动晶体管、数据写入晶体管、感测晶体管和电容。驱动晶体管被配置为驱动发光器件发光；数据写入晶体管被配置为在导通时将数据电压写入到所述驱动晶体管的栅极；电容被配置为存储数据电压并将其保持在驱动晶体管的栅极；感测晶体管被配置为对与待补偿子像素对应的感测线充电。
例如，数据写入晶体管的源极被配置为接收数据电压，数据写入晶体管的栅极连接栅线以接收第一驱动信号，数据写入晶体管的漏极连接驱动晶体管的栅极；驱动晶体管的源极连接第一电源端，驱动晶体管的漏极连接发光器件的第一端；电容的一端连接驱动晶体管的栅极，电容的另一端连接驱动晶体管的漏极；感测晶体管的源极连接驱动晶体管的漏极，感测晶体管的漏极连接与待 补偿子像素对应的感测线，感测晶体管的栅极被配置为接收第二驱动信号。
需要说明的是，关于像素电路的详细描述可以参考上述补偿方法实施例中的相关描述，在此不再赘述。
例如，在待补偿行的待补偿子像素内，第一驱动信号与第二驱动信号为相同的信号，以便于像素电路的设计。
例如，补偿写回阶段可以包括写回子阶段和重新发光子阶段。写回补偿电路202被配置为：在充电阶段完成时，将感测线的电压复位；在写回子阶段内，控制待补偿行的每个所述待补偿子像素的数据写入晶体管导通，将写回电压写入待补偿行的每个待补偿子像素的驱动晶体管的栅极；在重新发光子阶段内，控制待补偿行的每个待补偿子像素的数据写入晶体管断开，控制待补偿行的每个待补偿子像素的感测晶体管断开。
需要说明的是，写回确定电路201还用于执行上述补偿方法中的步骤S101，写回补偿电路202还用于执行上述补偿方法中的步骤S102，由此，关于写回确定电路201和写回补偿电路202的具体功能可以参见上述补偿方法的实施例中的相关描述。
例如，在本公开实施例中，写回确定电路201可以集成在OLED面板的驱动电路中，也可以采用单独的集成电路芯片实现。写回补偿电路202可以包括OLED面板的驱动电路中的数据信号产生电路、集成电路芯片以及感测线等。
由于本公开实施例提供的补偿装置和上述补偿方法基于相同的发明构思，因此该补偿装置中各个电路具体执行的方法步骤可以参见补偿方法实施例的相关部分，在此不再赘述。
本公开实施例还提供一种有机电致发光显示器(OLED)面板，该OLED面板包括如上述任一项所述的补偿装置。由于该OLED面板包括图4所示的补偿装置，因而能够实现与该补偿装置相同的技术效果，也即能够消除显示面板的暗线，提高显示面板显示的均一性。
图5是本公开一实施例提供的一种显示设备的示意图。本公开实施例还提供一种显示设备，该显示设备100包括上述任一项所述的OLED面板或补偿装置101。
例如，本公开实施例提供的显示设备100可以为手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。由于该显示设备100包括前述OLED面板或补偿装置101，因而能够实现与该 OLED面板或补偿装置101相同的技术效果，也即能够消除显示面板的暗线，提高显示面板显示的均一性。
以上所述仅是本公开的优选实施方案，显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (21)

  1. 一种有机电致发光显示器的补偿方法，包括：
    根据待补偿行的待补偿子像素在当前帧的数据电压和增益值，确定所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压，所述增益值大于1；
    在所述当前帧的空白区的扫描时间内，将所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压分别写回到所述待补偿行中对应的待补偿子像素。
  2. 根据权利要求1所述的补偿方法，其中，所述当前帧的显示时间包括多个行扫描时间，所述空白区的扫描时间包括所述多个行扫描时间中的最后W1个行扫描时间，所述最后W1个行扫描时间包括充电阶段和补偿写回阶段，其中，W1为正整数，
    所述补偿方法包括：
    在所述充电阶段，对所述待补偿行的每个所述待补偿子像素对应的感测线充电，所述感测线用于检测所述待补偿子像素的电学信号；
    在所述补偿写回阶段，根据检测到的所述感测线的电学信号计算所述待补偿行的每个所述待补偿子像素在所述当前帧的相邻下一帧的补偿电压。
  3. 根据权利要求2所述的补偿方法，其中，
    所述补偿方法还包括：在所述补偿写回阶段，将所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压分别写回到所述待补偿行中对应的待补偿子像素。
  4. 根据权利要求2所述的补偿方法，其中，所述根据待补偿行的待补偿子像素在所述当前帧的数据电压和增益值，确定所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压，包括：
    获取每个所述待补偿子像素的增益值；
    分别将每个所述待补偿子像素在所述当前帧的数据电压和所述增益值相乘，以得到每个所述待补偿子像素在所述当前帧的写回电压。
  5. 根据权利要求2-4任一项所述的补偿方法，其中，所述增益值采用如下公式确定：A＝M/(M-N)，A为所述待补偿行的所述待补偿子像素的增益值，M为所述当前帧的显示时间所包括的行扫描时间的个数，N为所述充电阶段所包括的行扫描时间的个数。
  6. 根据权利要求1-5任一项所述的补偿方法，其中，所述待补偿行的所有所述待补偿子像素对应的颜色相同。
  7. 根据权利要求6所述的补偿方法，其中，所述待补偿行的待补偿子像素的增益值与所述待补偿子像素对应的颜色相对应。
  8. 根据权利要求2-7任一项所述的补偿方法，其中，所述待补偿子像素包括像素电路，所述像素电路包括驱动晶体管、数据写入晶体管和感测晶体管，所述补偿写回阶段包括写回子阶段和重新发光子阶段，
    所述将所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压分别写回到所述待补偿行中对应的待补偿子像素，包括：
    在所述充电阶段完成时，将所述感测线的电压复位；
    在所述写回子阶段内，控制所述待补偿行的每个所述待补偿子像素的所述数据写入晶体管导通，将所述写回电压写入所述待补偿行的每个所述待补偿子像素的所述驱动晶体管的栅极；
    在所述重新发光子阶段内，控制所述待补偿行的每个所述待补偿子像素的数据写入晶体管断开，控制所述待补偿行的每个所述待补偿子像素的所述感测晶体管断开。
  9. 根据权利要求8所述的补偿方法，其中，在所述待补偿行的待补偿子像素内，所述数据写入晶体管的驱动信号与所述感测晶体管的驱动信号为相同的信号。
  10. 一种用于有机电致发光显示器的补偿装置，包括：
    写回确定电路，被配置为根据待补偿行的待补偿子像素在当前帧的数据电压和增益值，确定所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压，所述增益值大于1；
    写回补偿电路，被配置为在所述当前帧的空白区的扫描时间内，将所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压分别写回到所述待补偿行中对应的待补偿子像素。
  11. 根据权利要求10所述的补偿装置，其中，所述当前帧的显示时间包括多个行扫描时间，所述空白区的扫描时间包括所述多个行扫描时间中的最后W1个行扫描时间，所述最后W1个行扫描时间包括充电阶段和补偿写回阶段，其中，W1为正整数，
    所述写回补偿电路被配置为：
    在所述充电阶段，对所述待补偿行的每个所述待补偿子像素对应的感测线充电，所述感测线用于检测所述待补偿子像素的电学信号；
    在所述补偿写回阶段，根据检测到的所述感测线的电学信号计算所述待补偿行的每个所述待补偿子像素在所述当前帧的相邻下一帧的补偿电压。
  12. 根据权利要求11所述的补偿装置，其中，所述写回补偿电路还被配置为：在所述补偿写回阶段，将所述待补偿行的每个所述待补偿子像素在所述当前帧的写回电压分别写回到所述待补偿行中对应的待补偿子像素。
  13. 根据权利要求11所述的补偿装置，其中，所述写回确定电路被配置为：获取每个所述待补偿子像素的增益值；分别将每个所述待补偿子像素在所述当前帧的数据电压和所述增益值相乘，以得到每个所述待补偿子像素在所述当前帧的写回电压。
  14. 根据权利要求11-13任一项所述的补偿装置，其中，所述增益值采用如下公式确定：A＝M/(M-N)，A为所述待补偿行的待补偿子像素的增益值，M为所述当前帧的显示时间所包括的行扫描时间的个数，N为所述充电阶段所包括的行扫描时间的个数。
  15. 根据权利要求12-14任一项所述的补偿装置，其中，所述待补偿子像素包括像素电路和发光器件，所述像素电路包括驱动晶体管、数据写入晶体管、感测晶体管和电容，
    所述驱动晶体管被配置为驱动所述发光器件发光；
    所述数据写入晶体管被配置为在导通时将数据电压写入到所述驱动晶体管的栅极；
    所述电容被配置为存储所述数据电压并将其保持在所述驱动晶体管的栅极；
    所述感测晶体管被配置为对与所述待补偿子像素对应的所述感测线充电。
  16. 根据权利要求15所述的补偿装置，其中，所述补偿写回阶段包括写回子阶段和重新发光子阶段，所述写回补偿电路被配置为：
    在所述充电阶段完成时，将所述感测线的电压复位；
    在所述写回子阶段内，控制所述待补偿行的每个所述待补偿子像素的所述数据写入晶体管导通，将所述写回电压写入所述待补偿行的每个所述待补偿子像素的所述驱动晶体管的栅极；
    在所述重新发光子阶段内，控制所述待补偿行的每个所述待补偿子像素的 数据写入晶体管断开，控制所述待补偿行的每个所述待补偿子像素的所述感测晶体管断开。
  17. 根据权利要求15所述的补偿装置，其中，所述数据写入晶体管的源极被配置为接收所述数据电压，所述数据写入晶体管的栅极连接栅线以接收第一驱动信号，所述数据写入晶体管的漏极连接所述驱动晶体管的栅极；
    所述驱动晶体管的源极连接第一电源端，所述驱动晶体管的漏极连接所述发光器件的第一端；
    所述电容的一端连接所述驱动晶体管的栅极，所述电容的另一端连接所述驱动晶体管的漏极；
    所述感测晶体管的源极连接所述驱动晶体管的漏极，所述感测晶体管的漏极连接与所述待补偿子像素对应的所述感测线，所述感测晶体管的栅极被配置为接收第二驱动信号。
  18. 根据权利要求17所述的补偿装置，其中，在所述待补偿行的待补偿子像素内，所述第一驱动信号与所述第二驱动信号为相同的信号。
  19. 根据权利要求10-18任一项所述的补偿装置，其中，所述待补偿行的所有所述待补偿子像素对应的颜色相同。
  20. 根据权利要求19所述的补偿装置，其中，所述待补偿行的待补偿子像素的增益值与所述待补偿子像素对应的颜色相对应。
  21. 一种显示设备，包括如权利要求10-20任一项所述的补偿装置。
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JP2020519918A (ja) 2020-07-02
EP3624099A1 (en) 2020-03-18

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