WO2017143637A1 - Oled的数据补偿电路和方法以及oled显示装置 - Google Patents

Oled的数据补偿电路和方法以及oled显示装置 Download PDF

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WO2017143637A1
WO2017143637A1 PCT/CN2016/076846 CN2016076846W WO2017143637A1 WO 2017143637 A1 WO2017143637 A1 WO 2017143637A1 CN 2016076846 W CN2016076846 W CN 2016076846W WO 2017143637 A1 WO2017143637 A1 WO 2017143637A1
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voltage
data
signal
oled
output
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PCT/CN2016/076846
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English (en)
French (fr)
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徐京
黄泰钧
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深圳市华星光电技术有限公司
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Priority to US15/038,467 priority Critical patent/US10223968B2/en
Publication of WO2017143637A1 publication Critical patent/WO2017143637A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—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
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • 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
    • G09G2320/0204—Compensation of DC component across the pixels in flat panels
    • 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
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
    • G—PHYSICS
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD

Definitions

  • the present invention relates to the field of OLED display technologies, and in particular, to a data compensation circuit and method for an OLED, and an OLED display device.
  • the data driver senses a threshold voltage of a driving thin film transistor (TFT) of each pixel, and compensates data of each pixel according to the sensed threshold voltage.
  • TFT driving thin film transistor
  • Embodiments of the present invention provide a data compensation circuit and method for an OLED and an OLED display device, so that data compensation for the OLED is no longer limited by the source driver, and the effect of OLED data compensation can be improved.
  • the present invention provides a data compensation circuit for an OLED, comprising: a sensor circuit for detecting a drift amount of a threshold voltage of a driving thin film transistor, wherein a driving thin film transistor is used to drive an OLED; and a timing controller is connected to the sensor circuit for Receiving the drift amount, and outputting the voltage control signal and the source driving signal according to the drift amount, the source driving signal is used for controlling the voltage of the data signal output by the source driver; the reference voltage output circuit is connected with the timing controller for the voltage according to the voltage The control signal outputs a first reference voltage, wherein the voltage of the data signal output by the source driver and the first reference voltage are used to compensate for the amount of drift of the threshold voltage of the driving thin film transistor, thereby implementing data compensation for the OLED.
  • the timing controller also outputs a gate driving signal for controlling the gate driver to output a scanning signal to control transmission of the data signal to the driving thin film transistor.
  • the reference voltage output circuit further outputs a second reference voltage, and the second reference voltage is transmitted to a drain of the driving thin film transistor.
  • the timing controller is configured to: calculate a compensation voltage according to the drift amount; and output a voltage control signal and a source driving signal according to the compensation voltage.
  • the timing controller is configured to: determine whether the compensation voltage exceeds a voltage range of the data signal output by the source driver; if the voltage range of the data signal outputted by the source driver is not exceeded, adjust The source driving signal controls the voltage of the data signal output by the source driver; if the voltage range of the data signal output by the source driver is exceeded, the voltage control signal is adjusted to control the reference voltage output circuit to adjust the output first reference voltage.
  • the invention also provides a data compensation method for an OLED, comprising: detecting a drift amount of a threshold voltage of a driving thin film transistor, wherein the driving thin film transistor is used for driving the OLED; and outputting the voltage control signal and the source driving signal according to the drift amount, the source
  • the driving signal is used to control a voltage of the data signal output by the source driver; the first reference voltage is output according to the voltage control signal, wherein the voltage of the data signal output by the source driver and the first reference voltage are used to compensate the threshold voltage of the driving thin film transistor
  • the amount of drift in turn, achieves data compensation for the OLED.
  • the step of outputting the first reference voltage according to the voltage control signal further includes: outputting a second reference voltage, and transmitting the second reference voltage to a drain of the driving thin film transistor.
  • the step of outputting the voltage control signal and the source driving signal according to the drift amount includes: calculating a compensation voltage according to the drift amount; and outputting the voltage control signal and the source driving signal according to the compensation voltage.
  • the step of outputting the voltage control signal and the source driving signal according to the compensation voltage includes: determining whether the compensation voltage exceeds a voltage range of the data signal output by the source driver; if the voltage range of the data signal output by the source driver is not exceeded, adjusting The source driving signal controls the voltage of the data signal output by the source driver; if the output voltage range of the source driver is exceeded, the voltage control signal is adjusted to control the reference voltage output circuit to adjust the output first reference voltage.
  • the present invention also provides an OLED display device comprising: an OLED display panel comprising a plurality of OLEDs arranged in a matrix; a source driver for outputting a data signal and transmitting to the driving thin film transistor; wherein the source driver comprises data of the OLED
  • the compensation circuit is used for compensating for the drift of the threshold voltage of the driving thin film transistor, thereby realizing data compensation for the OLED
  • the data compensation circuit of the OLED includes: a sensor circuit for detecting the drift of the threshold voltage of the driving thin film transistor, wherein The driving thin film transistor is used for driving the OLED; the timing controller is connected to the sensor circuit for receiving the drift amount, and outputting the voltage control signal and the source driving signal according to the drift amount, and the source driving signal is used for controlling the data of the source driver output.
  • a voltage of the signal a reference voltage output circuit coupled to the timing controller for outputting the first reference voltage according to the voltage control signal, wherein the voltage of the data signal output by the source driver and the first reference voltage are used to compensate the threshold of the driving thin film transistor The amount of voltage drift, and thus the data complement to the OLED .
  • the timing controller also outputs a gate driving signal for controlling the gate driver to output a scanning signal to control transmission of the data signal to the driving thin film transistor.
  • the reference voltage output circuit further outputs a second reference voltage, and the second reference voltage is transmitted to a drain of the driving thin film transistor.
  • the timing controller is configured to: calculate a compensation voltage according to the drift amount; and output a voltage control signal and a source driving signal according to the compensation voltage.
  • the timing controller is configured to: determine whether the compensation voltage exceeds a voltage range of the data signal output by the source driver; if the voltage range of the data signal output by the source driver is not exceeded, adjust the source driving signal to control the output of the source driver The voltage of the data signal; if the voltage range of the data signal output from the source driver is exceeded, the voltage control signal is adjusted to control the reference voltage output circuit to adjust the output first reference voltage.
  • the present invention has the beneficial effects that the present invention detects the drift amount of the threshold voltage of the driving thin film transistor through the sensor circuit, wherein the driving thin film transistor is used to drive the OLED; the timing controller receives the drift amount, and according to the floating amount And outputting a voltage control signal for controlling a voltage of a data signal output by the source driver; and a reference voltage output circuit outputting a first reference voltage according to the voltage control signal, wherein the data signal of the source driver outputs
  • the voltage and the first reference voltage are used to compensate for the drift of the threshold voltage of the driving thin film transistor, thereby realizing data compensation for the OLED, so that the data compensation for the OLED is no longer limited by the source driver, and the data compensation of the OLED can be improved. effect.
  • FIG. 1 is a schematic structural diagram of a data compensation circuit of an OLED according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram showing the operation of a data compensation circuit of an OLED according to an embodiment of the present invention
  • FIG. 3 is a schematic flow chart of a data compensation method of an OLED according to a first embodiment of the present invention
  • FIG. 4 is a schematic flow chart of a data compensation method of an OLED according to a second embodiment of the present invention.
  • the data compensation circuit of the OLED includes a sensor circuit 11, a timing controller 12, and a reference voltage output circuit 13.
  • the sensor circuit 11 is configured to detect a drift amount sense of a threshold voltage of the driving thin film transistor.
  • the driving thin film transistor is used to drive the OLED.
  • the display panel 16 includes a plurality of OLEDs arranged in a matrix.
  • the timing controller 12 is connected to the sensor circuit 11 for receiving the drift amount sense, and outputs the voltage control signal ctl and the source drive signal sc according to the drift amount sense.
  • the source driving signal sc is for controlling the voltage of the data signal data output from the source driver 14.
  • the reference voltage output circuit 13 is connected to the timing controller 12 for outputting the first reference voltage OVSS according to the voltage control signal ctl.
  • the voltage of the data signal data and the first reference voltage OVSS outputted by the source driver 14 are used to compensate for the drift amount of the threshold voltage of the driving thin film transistor, thereby realizing data compensation for the OLED.
  • the reference voltage output circuit 13 further outputs a second reference voltage OVDD, which is transmitted to the drain of the driving thin film transistor.
  • the timing controller 12 also outputs a gate driving signal gc for controlling the gate driver 15 to output the scan signal scan to control the transfer of the data signal data to the driving thin film transistor.
  • the timing controller 12 is configured to: calculate a compensation voltage according to the drift amount sense; and output a voltage control signal ctl and a source drive signal sc according to the compensation voltage.
  • the timing controller 12 is configured to: determine whether the compensation voltage exceeds a voltage range of the data signal output by the source driver 14; if the voltage range of the data signal output from the source driver is not exceeded, adjust the source driving signal sc to control the source driver The voltage of the output data signal is 14; if the voltage range of the data signal output from the source driver 14 is exceeded, the voltage control signal ctl is adjusted to control the reference voltage output circuit 13 to adjust the output first reference voltage OVSS.
  • the data compensation circuit of the OLED shown in FIG. 1 specifically works as follows:
  • the sensor circuit 11 is configured to detect the amount of drift of the threshold voltage Vth of the driving thin film transistor, and feed back to the timing controller 12.
  • the reference voltage output circuit 13 generates a first reference voltage OVSS and a second reference voltage OVDD required for the OLED, while being capable of adjusting the magnitude of the output first reference voltage OVSS according to the voltage control signal ctl.
  • the processing of the timing controller 12 for receiving image data and algorithms generates a source drive signal sc and a gate drive signal gc.
  • the gate driver 15 receives the gate drive signal gc from the timing controller 12, and outputs a scan signal scan to control the turn-on of the scan line.
  • the source driver 14 receives the image data from the timing controller 12, and outputs the data signal data to match the opening of the scan line.
  • the data signal data is transmitted to the driving thin film transistor.
  • the timing controller 12 is further configured to receive the drift amount sense of the threshold voltage Vth of the driving thin film transistor detected by the sensor circuit 11, and output the voltage control signal ctl according to the drift amount sense of the threshold voltage Vth of the driving thin film transistor to control the reference voltage output.
  • the circuit 13 compensates for the drift amount sense of the threshold voltage Vth of the driving thin film transistor.
  • the threshold voltage of the driving thin film transistor can be compensated by adjusting the magnitude of the voltage of the data signal data output from the source driver 14.
  • the drift of Vth The magnitude of the voltage of the data signal data outputted from the source driver 14 exceeds the maximum voltage range that the source driver 14 can output.
  • the timing controller 12 outputs the voltage control signal ctl according to the drift amount sense of the threshold voltage Vth of the driving thin film transistor, and the reference voltage output circuit 13 adjusts and outputs the first reference voltage OVSS according to the voltage control signal ct1 to realize the threshold voltage Vth of the driving thin film transistor. The compensation of the drift amount sense.
  • the specific implementation process of the timing controller 12 for outputting the voltage control signal ctl according to the drift amount sense of the threshold voltage Vth of the driving thin film transistor to control the reference voltage output circuit 13 to compensate the floating amount sense of the threshold voltage Vth of the driving thin film transistor is as follows:
  • the first thin film transistor T1 is the above-described driving thin film transistor.
  • the source S of the first thin film transistor T1 is connected to the first end of the OLED 161, the second end of the first end of the OLED 161 is connected to the first reference voltage OVSS, and the drain D of the first thin film transistor T1 is connected to the second reference voltage OVDD.
  • the gate G of the first thin film transistor T1 is connected to the source of the second transistor T2, the gate of the second thin film transistor T2 is connected to the scan signal scan, and the drain of the second thin film transistor T2 is connected to the data signal data.
  • the gate G of the first thin film transistor T1 is also connected to the source of the third thin film transistor T3, and the drain of the third thin film transistor T3 is connected to the analog to digital converter ADC.
  • the gate of the third thin film transistor T3 is used to detect the drift amount sense of the threshold voltage of the first thin film transistor T1.
  • the third thin film transistor and the analog to digital converter ADC constitute the sensor circuit 11.
  • Ioled k(Voled-Vth_oled) ⁇ ,
  • Voled is the voltage difference across the OLED 161;
  • Vth_oled is the threshold voltage of the OLED.
  • this current is determined by the OLED 161 and the driving thin film transistor T1.
  • the relationship of the current Ids driving the thin film transistor T1 is as follows:
  • Vgs is a voltage difference between the gate and the source of the driving thin film transistor T1
  • Vth is a threshold voltage of the driving thin film transistor T1
  • Vg is a voltage for driving the gate of the thin film transistor T1
  • Vs is a voltage for driving the source of the thin film transistor T1.
  • Vg remains unchanged and the current becomes larger, Vs is pulled low. Therefore, by lowering Vs, the effect of Vgs-Vth can be achieved.
  • the threshold voltage Vth of the driving thin film transistor T1 is shifted by 1 V, and the maximum voltage of the data signal data of the output of the source driver is 10 V. Then, in order to drive the drift of the compensation threshold voltage Vth of the thin film transistor T1, the voltage of the data signal data outputted by the source driver should be raised by 1V from the original voltage. If the voltage of the data signal to be output is 10 V, in order to compensate for the drift of the threshold voltage Vth of the driving thin film transistor T1, the corresponding compensation voltage should be 11V. However, 11V exceeds the voltage range of the data signal data output from the source driver.
  • the voltage of the data signal data which cannot be output by the source driver can effectively compensate for the drift of the threshold voltage Vth of the driving thin film transistor T1.
  • the voltage of the first reference voltage OVSS can be lowered by 1V, thereby driving the voltage of the driving thin film transistor Vs to decrease by 1V, thereby achieving the effect of constant Vgs-Vth.
  • the timing controller 12 controls the floating amount sense according to the threshold voltage Vth of the driving thin film transistor.
  • the reference voltage output circuit 13 adjusts and outputs the first reference voltage OVSS according to the voltage control signal ct1 to thereby compensate the floating amount sense of the threshold voltage Vth of the driving thin film transistor, so that the data compensation for the OLED is not limited to the source driver, and can be improved. The effect of data compensation on OLEDs.
  • An embodiment of the present invention further provides an OLED display device, including: an OLED display panel, a source driver, and the foregoing data compensation circuit of the OLED.
  • the OLED display panel includes a plurality of OLEDs arranged in a matrix.
  • the source driver is used to output a data signal and transmit it to the driving thin film transistor.
  • the data compensation circuit of the OLED is used to compensate the drift amount of the threshold voltage of the driving thin film transistor, thereby realizing data compensation for the OLED.
  • the OLED display device further includes a gate driver that controls the opening of the scan line of the OLED display panel to enable the source driver to charge the data line of the OLED display panel through the output data signal.
  • the specific structure of the OLED display device is shown in FIG. 1 and will not be described herein.
  • FIG. 3 is a schematic flow chart of a data compensation method of an OLED according to a first embodiment of the present invention. As shown in FIG. 3, the data compensation method of the OLED includes:
  • Step S10 detecting a drift amount of a threshold voltage of the driving thin film transistor, wherein the driving thin film transistor Used to drive OLEDs.
  • the first end of the OLED is connected to the source of the driving thin film transistor, and the second end is connected to the first reference voltage.
  • the voltage difference between the two ends of the OLED is the voltage of the first end minus the voltage of the second end. To compensate the data of the OLED, the voltage of the first end can be increased, or the voltage of the second end can be reduced.
  • Step S11 output a voltage control signal and a source driving signal according to the drift amount, and the source driving signal is used to control the voltage of the data signal output by the source driver.
  • a gate drive signal is also outputted in step S11, and the gate drive signal is used to control the gate driver output scan signal to control the transfer of the data signal to the drive thin film transistor.
  • the opening of the scan line of the OLED display panel is controlled according to the scan signal, and the source driver cooperates with the opening of the scan line to transmit the data signal to the gate of the driving thin film transistor.
  • the larger the voltage of the data signal the larger the voltage difference between the gate and the source of the driving thin film transistor, which can compensate the drift of the threshold voltage of the driving thin film transistor, that is, increase the voltage of the first end of the OLED, in the first reference. When the voltage is constant, the voltage difference across the OLED is greater, which in turn enables data compensation for the OLED.
  • Step S12 Output a first reference voltage according to the voltage control signal, wherein the voltage of the data signal output by the source driver and the first reference voltage are used to compensate for the drift amount of the threshold voltage of the driving thin film transistor, thereby implementing data compensation for the OLED.
  • the data compensation of the OLED can no longer be achieved by adjusting the voltage of the data signal output by the source driver.
  • the voltage of the second end of the OLED can be lowered, that is, the first reference voltage can be lowered.
  • step S12 a second reference voltage is also output, and the second reference voltage is transmitted to the drain of the driving thin film transistor.
  • the compensation voltage is calculated according to the drift amount; then the voltage control signal and the source drive signal are output according to the compensation voltage. Specifically, it is determined whether the compensation voltage exceeds the voltage range of the data signal output from the source driver. If there is no voltage range beyond the data signal output by the source driver, the source drive signal is adjusted to control the voltage of the data signal output by the source driver, that is, by increasing the voltage of the first end of the OLED to achieve data compensation for the OLED.
  • the data compensation method of the OLED includes:
  • Step S200 Start compensation.
  • Step S201 Detecting the amount of drift of the threshold voltage Vth of the driving thin film transistor.
  • the first end of the OLED is connected to the source of the driving thin film transistor, and the second end of the OLED is connected to the second reference voltage.
  • the voltage difference across the OLED is the voltage at the first terminal minus the voltage at the second terminal.
  • Data compensation for the OLED can be achieved by increasing the voltage at the first terminal or by lowering the voltage at the second terminal.
  • Step S202 Calculate the compensation voltage according to the drift amount.
  • Step S203 determining whether the compensation voltage exceeds the voltage range of the data signal. If yes, step S204 is performed; if no, step S205 is performed.
  • Step S204 Adjust the first reference voltage to achieve compensation.
  • the first reference voltage is adjusted according to the amount of drift, that is, data compensation for the OLED is achieved by reducing the voltage of the second end of the OLED.
  • Step S205 The compensation is realized by adjusting the voltage of the output data signal by the source driver.
  • the voltage of the output data signal is increased by the source driver, and is transmitted to the gate of the driving thin film transistor when the scan line is turned on, which increases the voltage of the gate of the driving thin film transistor, and can compensate when the first reference voltage is constant.
  • the drift of the threshold voltage of the driving thin film transistor thereby realizing data compensation for the OLED, so that the data compensation for the OLED is no longer limited by the source driver, and the effect of data compensation of the OLED can be improved.
  • the present invention detects the amount of drift of the threshold voltage of the driving thin film transistor by the sensor circuit, wherein the driving thin film transistor is used to drive the OLED; the timing controller receives the drift amount, and outputs the voltage control signal and the source according to the drift amount.
  • a pole drive signal the source drive signal is used to control a voltage of the data signal output by the source driver;
  • the reference voltage output circuit outputs a first reference voltage according to the voltage control signal, wherein the voltage of the data signal output by the source driver and the first reference voltage It is used to compensate the drift of the threshold voltage of the driving thin film transistor, thereby realizing data compensation for the OLED, so that the data compensation for the OLED is no longer limited by the source driver, and the effect of data compensation of the OLED can be improved.

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Abstract

一种OLED的数据补偿电路和方法以及OLED显示装置，OLED的数据补偿电路包括：传感器电路(11)，用于侦测驱动薄膜晶体管(T1)的阈值电压(Vth)的飘移量(sense)，其中驱动薄膜晶体管(T1)用于驱动OLED(161)；时序控制器(12)，与传感器电路(11)连接，用于接收飘移量(sense)，并根据飘移量(sense)输出电压控制信号(ct1)和源极驱动信号(sc)，源极驱动信号(sc)用于控制源极驱动器(14)输出的数据信号(data)的电压；参考电压输出电路(13)，与时序控制器(12)连接，用于根据电压控制信号(ct1)输出第一参考电压(OVSS)，其中源极驱动器(14)输出的数据信号(data)的电压和第一参考电压(OVSS)用于补偿驱动薄膜晶体管(T1)的阈值电压(Vth)的飘移量(sense)，进而实现对OLED(161)的数据补偿。通过以上方式，使得对OLED(161)的数据补偿不再受限于源极驱动器(14)，能够改善OLED(161)数据补偿的效果。

Description

OLED的数据补偿电路和方法以及OLED显示装置 【技术领域】
本发明涉及OLED显示技术领域，特别是涉及一种OLED的数据补偿电路和方法以及OLED显示装置。
【背景技术】
现有技术中，数据驱动器感测每个像素的驱动薄膜晶体管(Thin Film Transistor，TFT)的阈值电压，并根据感测到的阈值电压来补偿每个像素的数据。
然而，当计算出的补偿电压超过了数据驱动器的最大电压时，则难以对数据进行正确有效的补偿。
【发明内容】
本发明实施例提供了一种OLED的数据补偿电路和方法以及OLED显示装置，使得对OLED的数据补偿不再受限于源极驱动器，能够改善OLED数据补偿的效果。
本发明提供一种OLED的数据补偿电路，包括：传感器电路，用于侦测驱动薄膜晶体管的阈值电压的飘移量，其中驱动薄膜晶体管用于驱动OLED；时序控制器，与传感器电路连接，用于接收飘移量，并根据飘移量输出电压控制信号和源极驱动信号，源极驱动信号用于控制源极驱动器输出的数据信号的电压；参考电压输出电路，与时序控制器连接，用于根据电压控制信号输出第一参考电压，其中源极驱动器输出的数据信号的电压和第一参考电压用于补偿驱动薄膜晶体管的阈值电压的飘移量，进而实现对OLED的数据补偿。
其中，时序控制器还输出栅极驱动信号，栅极驱动信号用于控制栅极驱动器输出扫描信号，以控制将数据信号传输至驱动薄膜晶体管。
其中，参考电压输出电路还输出第二参考电压，第二参考电压传输至驱动薄膜晶体管的漏极。
其中，时序控制器用于：根据飘移量计算补偿电压；根据补偿电压输出电压控制信号和源极驱动信号。
其中，时序控制器用于：判断补偿电压是否超出源极驱动器输出的数据信号的电压范围；如果没有超出源极驱动器输出的数据信号的电压范围，则调整 源极驱动信号以控制源极驱动器输出的数据信号的电压；如果超出源极驱动器输出的数据信号的电压范围，则调整电压控制信号以控制参考电压输出电路调整输出第一参考电压。
本发明还提供一种OLED的数据补偿方法，包括：侦测驱动薄膜晶体管的阈值电压的飘移量，其中驱动薄膜晶体管用于驱动OLED；根据飘移量输出电压控制信号和源极驱动信号，源极驱动信号用于控制源极驱动器输出的数据信号的电压；根据电压控制信号输出第一参考电压，其中源极驱动器输出的数据信号的电压和第一参考电压用于补偿驱动薄膜晶体管的阈值电压的飘移量，进而实现对OLED的数据补偿。
其中，根据电压控制信号输出第一参考电压的步骤还包括：输出第二参考电压，第二参考电压传输至驱动薄膜晶体管的漏极。
其中，根据飘移量输出电压控制信号和源极驱动信号的步骤包括：根据飘移量计算补偿电压；根据补偿电压输出电压控制信号和源极驱动信号。
其中，根据补偿电压输出电压控制信号和源极驱动信号的步骤包括：判断补偿电压是否超出源极驱动器输出的数据信号的电压范围；如果没有超出源极驱动器输出的数据信号的电压范围，则调整源极驱动信号以控制源极驱动器输出的数据信号的电压；如果超出源极驱动器的输出电压范围，则调整电压控制信号以控制参考电压输出电路调整输出第一参考电压。
本发明还提供一种OLED显示装置，包括：OLED显示面板，包括矩阵式排列的多个OLED；源极驱动器，用于输出数据信号并传输至驱动薄膜晶体管；其中，源极驱动器包括OLED的数据补偿电路，用于补偿驱动薄膜晶体管的阈值电压的飘移量，进而实现对OLED的数据补偿；OLED的数据补偿电路，包括：传感器电路，用于侦测驱动薄膜晶体管的阈值电压的飘移量，其中驱动薄膜晶体管用于驱动OLED；时序控制器，与传感器电路连接，用于接收飘移量，并根据飘移量输出电压控制信号和源极驱动信号，源极驱动信号用于控制源极驱动器输出的数据信号的电压；参考电压输出电路，与时序控制器连接，用于根据电压控制信号输出第一参考电压，其中源极驱动器输出的数据信号的电压和第一参考电压用于补偿驱动薄膜晶体管的阈值电压的飘移量，进而实现对OLED的数据补偿。
其中，时序控制器还输出栅极驱动信号，栅极驱动信号用于控制栅极驱动器输出扫描信号，以控制将数据信号传输至驱动薄膜晶体管。
其中，参考电压输出电路还输出第二参考电压，第二参考电压传输至驱动薄膜晶体管的漏极。
其中，时序控制器用于：根据飘移量计算补偿电压；根据补偿电压输出电压控制信号和源极驱动信号。
其中，时序控制器用于：判断补偿电压是否超出源极驱动器输出的数据信号的电压范围；如果没有超出源极驱动器输出的数据信号的电压范围，则调整源极驱动信号以控制源极驱动器输出的数据信号的电压；如果超出源极驱动器输出的数据信号的电压范围，则调整电压控制信号以控制参考电压输出电路调整输出第一参考电压。
通过上述方案，本发明的有益效果是：本发明通过传感器电路侦测驱动薄膜晶体管的阈值电压的飘移量，其中驱动薄膜晶体管用于驱动所述OLED；时序控制器接收飘移量，并根据飘移量输出电压控制信号和源极驱动信号，源极驱动信号用于控制源极驱动器输出的数据信号的电压；参考电压输出电路根据电压控制信号输出第一参考电压，其中源极驱动器输出的数据信号的电压和第一参考电压用于补偿驱动薄膜晶体管的阈值电压的飘移量，进而实现对OLED的数据补偿，如此使得对OLED的数据补偿不再受限于源极驱动器，能够改善OLED的数据补偿的效果。
【附图说明】
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。其中：
图1是本发明实施例的OLED的数据补偿电路的结构示意图；
图2是本发明实施例的OLED的数据补偿电路的工作示意图；
图3是本发明第一实施例的OLED的数据补偿方法的流程示意图；
图4是本发明第二实施例的OLED的数据补偿方法的流程示意图。
【具体实施方式】
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是 全部实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性的劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图1是本发明第一实施例的OLED的数据补偿电路的结构示意图。如图1所示，OLED的数据补偿电路包括：传感器电路11、时序控制器12以及参考电压输出电路13。传感器电路11用于侦测驱动薄膜晶体管的阈值电压的飘移量sense。其中驱动薄膜晶体管用于驱动OLED。显示面板16中包括矩阵式排列的多个OLED。时序控制器12与传感器电路11连接，用于接收飘移量sense，并根据飘移量sense输出电压控制信号ctl和源极驱动信号sc。源极驱动信号sc用于控制源极驱动器14输出的数据信号data的电压。参考电压输出电路13与时序控制器12连接，用于根据电压控制信号ctl输出第一参考电压OVSS。其中源极驱动器14输出的数据信号data的电压和第一参考电压OVSS用于补偿驱动薄膜晶体管的阈值电压的飘移量，进而实现对OLED的数据补偿。
在本发明实施例中，参考电压输出电路13还输出第二参考电压OVDD，第二参考电压OVDD传输至驱动薄膜晶体管的漏极。时序控制器12还输出栅极驱动信号gc，栅极驱动信号gc用于控制栅极驱动器15输出扫描信号scan，以控制将数据信号data传输至驱动薄膜晶体管。
在本发明实施例中，时序控制器12用于：根据飘移量sense计算补偿电压；根据补偿电压输出电压控制信号ctl和源极驱动信号sc。时序控制器12用于：判断补偿电压是否超出源极驱动器14输出的数据信号的电压范围；如果没有超出源极驱动器输出的数据信号的电压范围，则调整源极驱动信号sc以控制源极驱动器14输出的数据信号的电压；如果超出源极驱动器14输出的数据信号的电压范围，则调整电压控制信号ctl以控制参考电压输出电路13调整输出第一参考电压OVSS。
图1所示的OLED的数据补偿电路具体工作如下：
传感器电路11用于侦测驱动薄膜晶体管的阈值电压Vth的飘移量，并找反馈给时序控制器12。参考电压输出电路13产生OLED所需的第一参考电压OVSS和第二参考电压OVDD，同时能够根据电压控制信号ctl调节输出的第一参考电压OVSS的大小。时序控制器12用于接收图像数据及算法的处理产生源极驱动信号sc和栅极驱动信号gc。栅极驱动器15接收来自时序控制器12的栅极驱动信号gc，输出扫描信号scan以控制扫描线的打开。源极驱动器14接收来自时序控制器12的图像数据，输出数据信号data以配合扫描线的打开，给数 据线充电，即将数据信号data传输至驱动薄膜晶体管。时序控制器12还用于接收传感器电路11侦测的驱动薄膜晶体管的阈值电压Vth的飘移量sense，并根据驱动薄膜晶体管的阈值电压Vth的飘移量sense输出电压控制信号ctl，以控制参考电压输出电路13对驱动薄膜晶体管的阈值电压Vth的飘移量sense进行补偿。
在源极驱动器14输出的数据信号data的电压的大小没有超出源极驱动器14能够输出的最大电压范围时，可以通过调整源极驱动器14输出的数据信号data的电压的大小补偿驱动薄膜晶体管阈值电压Vth的飘移。在源极驱动器14输出的数据信号data的电压的大小超出源极驱动器14能够输出的最大电压范围时，。时序控制器12根据驱动薄膜晶体管的阈值电压Vth的飘移量sense输出电压控制信号ctl，参考电压输出电路13根据电压控制信号ctl调整输出第一参考电压OVSS进而实现对驱动薄膜晶体管的阈值电压Vth的飘移量sense的补偿。
时序控制器12根据驱动薄膜晶体管的阈值电压Vth的飘移量sense输出电压控制信号ctl，以控制参考电压输出电路13对驱动薄膜晶体管的阈值电压Vth的飘移量sense进行补偿的具体实现过程如下：
参见图2，第一薄膜晶体管T1为上述的驱动薄膜晶体管。第一薄膜晶体管T1的源极S接OLED 161的第一端，OLED 161的第一端的第二端接第一参考电压OVSS，第一薄膜晶体管T1的漏极D通过接第二参考电压OVDD。第一薄膜晶体管T1的栅极G接第二晶体管T2的源极，第二薄膜晶体管T2的栅极接扫描信号scan，第二薄膜晶体管T2的漏极接数据信号data。第一薄膜晶体管T1的栅极G还接第三薄膜晶体管T3的源极，第三薄膜晶体管T3的漏极接模数转换器ADC。第三薄膜晶体管T3的栅极用于侦测第一薄膜晶体管T1的阈值电压的飘移量sense。其中第三薄膜晶体管与模数转换器ADC构成传感器电路11。
OLED 161的数据补偿电路的具体工作过程如下：
OLED 161的电流Ioled的关系式如下：
Ioled＝k(Voled-Vth_oled)α，
其中，k、α为常数，Voled为OLED 161两端的电压差；Vth_oled为OLED的阈值电压。
当第一参考电压OVSS电压降低时，OLED 161两端的电压差增大，引起OLED 161的电流增大。
又由于该电流由OLED 161和驱动薄膜晶体管T1共同决定。驱动薄膜晶体管T1的电流Ids的关系式如下：
Ids＝K(Vgs-Vth)2＝K(Vg-Vs-Vth)2
其中，Vgs为驱动薄膜晶体管T1栅极与源极的电压差，Vth为驱动薄膜晶体管T1的阈值电压，Vg为驱动薄膜晶体管T1栅极的电压，Vs为驱动薄膜晶体管T1源极的电压。
当Vg保持不变，而电流变大时，Vs就会被拉低。因此将Vs降低，就可以达到Vgs-Vth不变的效果。
例如，假设驱动薄膜晶体管T1的阈值电压Vth飘移了1V，且源极驱动器的输出的数据信号data的最大电压为10V。那么为了驱动薄膜晶体管T1的补偿阈值电压Vth的飘移，源极驱动器输出的数据信号data的电压应该在原本电压基础上提升1V。如果要输出的数据信号的电压为10V，为了补偿驱动薄膜晶体管T1的阈值电压Vth的飘移，其对应的补偿电压应为11V。然而，11V超出了源极驱动器输出的数据信号data的电压范围。此时，无法通过源极驱动器输出的数据信号data的电压有效地实现对驱动薄膜晶体管T1的阈值电压Vth的飘移的补偿。此时可以将第一参考电压OVSS的电压降低1V，进而带动驱动薄膜晶体管Vs电压降低1V，从而达到Vgs-Vth不变的效果。
本发明实施例中，在源极驱动器14输出的数据信号data的电压的大小超出源极驱动器14能够输出的最大电压范围时，时序控制器12根据驱动薄膜晶体管的阈值电压Vth的飘移量sense控制参考电压输出电路13根据电压控制信号ctl调整输出第一参考电压OVSS进而实现对驱动薄膜晶体管的阈值电压Vth的飘移量sense的补偿，使得对OLED的数据补偿不受限于源极驱动器，能够改善对OLED进行数据补偿的效果。
本发明实施例还提供一种OLED显示装置，包括：OLED显示面板、源极驱动器以及前述的OLED的数据补偿电路。其中OLED显示面板包括矩阵式排列的多个OLED。源极驱动器用于输出数据信号并传输至驱动薄膜晶体管。其中，OLED的数据补偿电路用于补偿所述驱动薄膜晶体管的阈值电压的飘移量，进而实现对OLED的数据补偿。OLED显示装置还包括栅极驱动器，控制OLED显示面板的扫描线的打开，使源极驱动器能够通过输出的数据信号给OLED显示面板的数据线充电。OLED显示装置的具体结构参见图1，在此不再赘述。
图3是本发明第一实施例的OLED的数据补偿方法的流程示意图。如图3所示，OLED的数据补偿方法包括：
步骤S10：侦测驱动薄膜晶体管的阈值电压的飘移量，其中驱动薄膜晶体管 用于驱动OLED。OLED的第一端接驱动薄膜晶体管的源极，第二端接第一参考电压。OLED两端的电压差为第一端的电压减去第二端的电压，要对OLED进行数据补偿，通过增加第一端的电压，或者是降低第二端的电压都能够实现。
步骤S11：根据飘移量输出电压控制信号和源极驱动信号，源极驱动信号用于控制源极驱动器输出的数据信号的电压。
在步骤S11中还输出栅极驱动信号，栅极驱动信号用于控制栅极驱动器输出扫描信号，以控制将数据信号传输至驱动薄膜晶体管。具体地，根据扫描信号控制OLED显示面板的扫描线的打开，源极驱动器配合扫描线的打开将数据信号传输至驱动薄膜晶体管的栅极。数据信号的电压越大，驱动薄膜晶体管的栅极与源极的电压差也就越大，能够补偿驱动薄膜晶体管的阈值电压的飘移量，即增加OLED的第一端的电压，在第一参考电压不变时，OLED两端的电压差也就越大，进而能够对OLED进行数据补偿。
步骤S12：根据电压控制信号输出第一参考电压，其中源极驱动器输出的数据信号的电压和第一参考电压用于补偿驱动薄膜晶体管的阈值电压的飘移量，进而实现对OLED的数据补偿。
在源极驱动器输出的数据信号的电压的大小超出源极驱动器能够输出的最大电压范围时，不能再通过调整源极驱动器输出的数据信号的电压来实现对OLED的数据补偿。此时可以通过降低OLED的第二端的电压，即降低第一参考电压。
在步骤S12中，还输出第二参考电压，第二参考电压传输至驱动薄膜晶体管的漏极。
在本发明实施例中，根据飘移量计算补偿电压；然后根据补偿电压输出电压控制信号和源极驱动信号。具体地，判断补偿电压是否超出源极驱动器输出的数据信号的电压范围。如果没有超出源极驱动器输出的数据信号的电压范围，则调整源极驱动信号以控制源极驱动器输出的数据信号的电压，即通过增加OLED的第一端的电压来实现对OLED的数据补偿。如果超出源极驱动器的输出电压范围，则调整电压控制信号以控制参考电压输出电路调整输出第一参考电压，即通过降低OLED的第二端的电压来实现对OLED的数据补偿，如此使得对OLED的数据补偿不再受限于源极驱动器，能够改善OLED的数据补偿的效果。
更详细地，参见图4，OLED的数据补偿方法包括：
步骤S200：开始补偿。
步骤S201：侦测驱动薄膜晶体管的阈值电压Vth的飘移量。
在本发明实施例中，OLED的第一端连接驱动薄膜晶体管的源极，OLED的第二端连接第二参考电压。OLED两端的电压差为第一端的电压减去第二端的电压。要对OLED进行数据补偿，通过增加第一端的电压，或者是降低第二端的电压都能够实现。
步骤S202：根据飘移量计算补偿电压。
步骤S203：判断补偿电压是否超出数据信号的电压范围。如果是，则执行步骤S204；如果否，则执行步骤S205。
步骤S204：调节第一参考电压以实现补偿。
具体地，根据飘移量调节第一参考电压，即通过降低OLED的第二端的电压来实现对OLED的数据补偿。
步骤S205：通过源极驱动器调整输出的数据信号的电压实现补偿。
具体地，通过源极驱动器增加输出的数据信号的电压，在扫描线打开时传输至驱动薄膜晶体管的栅极，增加了驱动薄膜晶体管栅极的电压，在第一参考电压不变时，能够补偿驱动薄膜晶体管的阈值电压的飘移，进而实现对OLED的数据补偿，使得对OLED的数据补偿不再受限于源极驱动器，能够改善OLED的数据补偿的效果。
综上所述，本发明通过传感器电路侦测驱动薄膜晶体管的阈值电压的飘移量，其中驱动薄膜晶体管用于驱动所述OLED；时序控制器接收飘移量，并根据飘移量输出电压控制信号和源极驱动信号，源极驱动信号用于控制源极驱动器输出的数据信号的电压；参考电压输出电路根据电压控制信号输出第一参考电压，其中源极驱动器输出的数据信号的电压和第一参考电压用于补偿驱动薄膜晶体管的阈值电压的飘移量，进而实现对OLED的数据补偿，如此使得对OLED的数据补偿不再受限于源极驱动器，能够改善OLED的数据补偿的效果。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (14)

  1. 一种OLED的数据补偿电路，其中，所述数据补偿电路包括：
    传感器电路，用于侦测驱动薄膜晶体管的阈值电压的飘移量，其中所述驱动薄膜晶体管用于驱动所述OLED；
    时序控制器，与所述传感器电路连接，用于接收所述飘移量，并根据所述飘移量输出电压控制信号和源极驱动信号，所述源极驱动信号用于控制源极驱动器输出的数据信号的电压；
    参考电压输出电路，与所述时序控制器连接，用于根据所述电压控制信号输出第一参考电压，其中所述源极驱动器输出的所述数据信号的电压和所述第一参考电压用于补偿所述驱动薄膜晶体管的阈值电压的飘移量，进而实现对所述OLED的数据补偿。
  2. 根据权利要求1所述的数据补偿电路，其中，所述时序控制器还输出栅极驱动信号，所述栅极驱动信号用于控制栅极驱动器输出扫描信号，以控制将所述数据信号传输至所述驱动薄膜晶体管。
  3. 根据权利要求1所述的数据补偿电路，其中，所述参考电压输出电路还输出第二参考电压，所述第二参考电压传输至所述驱动薄膜晶体管的漏极。
  4. 根据权利要求1所述的数据补偿电路，其中，所述时序控制器用于：
    根据所述飘移量计算补偿电压；
    根据所述补偿电压输出所述电压控制信号和所述源极驱动信号。
  5. 根据权利要求4所述的数据补偿电路，其中，所述时序控制器用于：
    判断所述补偿电压是否超出所述源极驱动器输出的所述数据信号的电压范围；
    如果没有超出所述源极驱动器输出的所述数据信号的电压范围，则调整所述源极驱动信号以控制所述源极驱动器输出的所述数据信号的电压；
    如果超出所述源极驱动器输出的所述数据信号的电压范围，则调整所述电压控制信号以控制所述参考电压输出电路调整输出所述第一参考电压。
  6. 一种OLED的数据补偿方法，其中，所述方法包括：
    侦测驱动薄膜晶体管的阈值电压的飘移量，其中所述驱动薄膜晶体管用于驱动所述OLED；
    根据所述飘移量输出电压控制信号和源极驱动信号，所述源极驱动信号用于控制源极驱动器输出的数据信号的电压；
    根据所述电压控制信号输出第一参考电压，其中所述源极驱动器输出的所述数据信号的电压和所述第一参考电压用于补偿所述驱动薄膜晶体管的阈值电压的飘移量，进而实现对所述OLED的数据补偿。
  7. 根据权利要求6所述的方法，其中，所述根据所述电压控制信号输出第一参考电压的步骤还包括：
    输出第二参考电压，所述第二参考电压传输至所述驱动薄膜晶体管的漏极。
  8. 根据权利要求6所述的方法，其中，所述根据所述飘移量输出电压控制信号和源极驱动信号的步骤包括：
    根据所述飘移量计算补偿电压；
    根据所述补偿电压输出所述电压控制信号和所述源极驱动信号。
  9. 根据权利要求8所述的方法，其中，所述根据所述补偿电压输出所述电压控制信号和所述源极驱动信号的步骤包括：
    判断所述补偿电压是否超出所述源极驱动器输出的所述数据信号的电压范围；
    如果没有超出所述源极驱动器输出电压范围，则调整所述源极驱动信号以控制所述源极驱动器输出的所述数据信号的电压；
    如果超出所述源极驱动器输出的所述数据信号的电压范围，则调整所述电压控制信号以控制所述参考电压输出电路调整输出所述第一参考电压。
  10. 一种OLED显示装置，其中，所述装置包括：
    OLED显示面板，包括矩阵式排列的多个OLED；
    源极驱动器，用于输出数据信号并传输至驱动薄膜晶体管；
    其中，所述源极驱动器包括OLED的数据补偿电路，用于补偿所述驱动薄膜晶体管的阈值电压的飘移量，进而实现对所述OLED的数据补偿；所述数据补偿电路包括：
    传感器电路，用于侦测驱动薄膜晶体管的阈值电压的飘移量，其中所述驱动薄膜晶体管用于驱动所述OLED；
    时序控制器，与所述传感器电路连接，用于接收所述飘移量，并根据所述飘移量输出电压控制信号和源极驱动信号，所述源极驱动信号用于控制源极驱动器输出的数据信号的电压；
    参考电压输出电路，与所述时序控制器连接，用于根据所述电压控制信号输出第一参考电压，其中所述源极驱动器输出的所述数据信号的电压和所述第一参考电压用于补偿所述驱动薄膜晶体管的阈值电压的飘移量，进而实现对所述OLED的数据补偿。
  11. 根据权利要求10所述的OLED显示装置，其中，所述时序控制器还输出栅极驱动信号，所述栅极驱动信号用于控制栅极驱动器输出扫描信号，以控制将所述数据信号传输至所述驱动薄膜晶体管。
  12. 根据权利要求10所述的OLED显示装置，其中，所述参考电压输出电路还输出第二参考电压，所述第二参考电压传输至所述驱动薄膜晶体管的漏极。
  13. 根据权利要求10所述的OLED显示装置，其中，所述时序控制器用于：
    根据所述飘移量计算补偿电压；
    根据所述补偿电压输出所述电压控制信号和所述源极驱动信号。
  14. 根据权利要求13所述的OLED显示装置，其中，所述时序控制器用于：
    判断所述补偿电压是否超出所述源极驱动器输出的所述数据信号的电压范围；
    如果没有超出所述源极驱动器输出的所述数据信号的电压范围，则调整所述源极驱动信号以控制所述源极驱动器输出的所述数据信号的电压；
    如果超出所述源极驱动器输出的所述数据信号的电压范围，则调整所述电压控制信号以控制所述参考电压输出电路调整输出所述第一参考电压。
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