WO2020173197A1 - 像素数据补偿参数获取方法及装置、amoled显示面板 - Google Patents

像素数据补偿参数获取方法及装置、amoled显示面板 Download PDF

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Publication number
WO2020173197A1
WO2020173197A1 PCT/CN2019/127866 CN2019127866W WO2020173197A1 WO 2020173197 A1 WO2020173197 A1 WO 2020173197A1 CN 2019127866 W CN2019127866 W CN 2019127866W WO 2020173197 A1 WO2020173197 A1 WO 2020173197A1
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Prior art keywords
pixel data
driving transistor
voltage value
state
sensing voltage
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PCT/CN2019/127866
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English (en)
French (fr)
Inventor
王雨
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京东方科技集团股份有限公司
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Priority to US16/976,563 priority Critical patent/US11238801B2/en
Publication of WO2020173197A1 publication Critical patent/WO2020173197A1/zh

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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
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    • 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
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    • 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
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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]
    • G09G3/3275—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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    • G09G2300/0421—Structural details of the set of electrodes
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Definitions

  • the present invention relates to the field of display technology, in particular to a method and device for acquiring pixel data compensation parameters, and an AMOLED display panel.
  • AMOLED Active-Matrix Organic Light-Emitting Diode, Active Matrix Organic Light-Emitting Diode
  • displays have become more and more widely used due to their advantages of high contrast, high color gamut, lightness and thinness, and flexibility. application.
  • Vth threshold voltage
  • the present invention provides a method and device for acquiring pixel data compensation parameters, and an AMOLED display panel to solve the problem of poor display effect caused by the drift of the threshold voltage of the driving transistor in the pixel unit in the related art.
  • a method for acquiring pixel data compensation parameters including:
  • the sensing voltage value refers to the potential value at one end of the driving transistor and the display diode after the pixel data is written;
  • the compensation parameter is used to compensate each pixel data in the subsequent display process.
  • the first state is a detection state in which the AMOLED display screen is in a non-display process
  • the second state is a detection state in which the AMOLED display screen is in a display process.
  • obtaining the sensing voltage value of the driving transistor in each pixel unit in the AMOLED display screen includes:
  • the driving transistor When the driving transistor is operating in a saturated state, the first sensing voltage value of the driving transistor is acquired.
  • obtaining the sensing voltage value of the driving transistor in each pixel unit includes:
  • a piece of dynamic pixel data is written to the driving transistor in each pixel unit to obtain the value of the dynamic pixel data when the sensing voltage value is equal to the first sensing voltage value.
  • determining the compensation parameter of the pixel data of each pixel unit based on the sensing voltage values in the first state and the second state includes:
  • the actual threshold voltage and the current coefficient are determined based on the compensation equation group, wherein the compensation parameter includes the actual threshold voltage and the current coefficient.
  • the method further includes:
  • the product of the first pixel data of each pixel unit and the current coefficient is obtained, and the sum of the product and the actual threshold voltage is obtained, and the sum is the pixel data after compensation.
  • control terminal of the driving transistor in each pixel unit in the AMOLED display screen is connected to the first switching device; the method further includes:
  • the driving transistor is controlled to work in a linear state or a saturated state.
  • a second switching device is connected to the connection between the driving transistor and the display diode; the method further includes:
  • the method further includes:
  • the second switching device is turned on to write a reset signal to the end of the driving transistor connected to the display diode.
  • an apparatus for obtaining pixel data compensation parameters including:
  • the first sensing voltage value acquiring module is used to acquire the sensing voltage value of the driving transistor in each pixel unit in the first state in the AMOLED display screen;
  • the second sensing voltage value acquisition module is used to acquire the sensing voltage value of the driving transistor in each pixel unit in the second state; the sensing voltage value refers to the driving transistor and the display diode after the pixel data is written Connect the potential value at one end;
  • the compensation parameter determination module is used to determine the compensation parameter of the pixel data of each pixel unit based on the sensed voltage value in the first state and the second state; the compensation parameter is used to determine the compensation parameter of each pixel in the subsequent display process. Data is compensated.
  • an AMOLED display panel including an array substrate and a driving circuit board, and the driving circuit board is used to implement the steps of the method described in the first aspect.
  • a readable storage medium in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the steps of the method of the first aspect are implemented .
  • FIG. 1 is a schematic flowchart of a method for acquiring pixel data compensation parameters according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a process of obtaining a first sensed voltage value according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a process of obtaining a second sensed voltage value according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a process of obtaining compensation parameters according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a process of compensating pixel data according to an embodiment of the present invention.
  • Fig. 6 is a schematic diagram of an AMOLED compensation circuit according to an embodiment of the present invention.
  • FIG. 7 is a timing diagram for the compensation circuit shown in FIG. 6 according to an embodiment of the present invention.
  • FIG. 8 is another timing diagram for the compensation circuit shown in FIG. 6 according to an embodiment of the present invention.
  • Fig. 9 is a block diagram of a device for obtaining pixel data compensation parameters according to an embodiment of the present invention.
  • AMOLED Active-Matrix Organic Light-Emitting Diode, Active Matrix Organic Light-Emitting Diode
  • displays have become more and more widely used due to their advantages of high contrast, high color gamut, lightness and thinness, and flexibility. application.
  • Vth threshold voltage
  • an embodiment of the present invention provides a method for acquiring pixel data compensation parameters.
  • the inventive concept is to acquire the sensing voltage value of the driving transistor in the pixel unit detected by the AMOLED display screen in at least two working states, based on multiple The relationship between the group sensed voltage value and the current formula can determine the compensation parameter.
  • each pixel unit can be used to adjust its own pixel data using compensation parameters, so that the display effects of all pixel units tend to be consistent.
  • FIG. 1 is a schematic flowchart of a method for acquiring pixel data compensation parameters according to an embodiment of the present invention.
  • a method for acquiring pixel data compensation parameters can be used for driving circuit boards in AMOLED, including steps 101 to 103, among them:
  • step 101 the sensing voltage value of the driving transistor in each pixel unit in the first state in the AMOLED display screen is obtained.
  • the AMOLED display screen can work in different processes, such as a non-display process and a display process.
  • the first state and the second state are defined.
  • the first state is the detection state when the AMOLED display is in the non-display process;
  • the second state is the detection state when the AMOLED display is in the display process .
  • the sensing voltage value refers to the potential value at one end of the driving transistor and the display diode after the pixel data is written.
  • the driving circuit board in the first state, writes fixed pixel data to the driving transistors in each pixel unit (corresponding to step 201).
  • the driving transistor can be switched from a linear state to a saturated working state, and when the driving transistor is working in a saturated state, the sensing voltage value of the driving transistor is obtained.
  • the sensed voltage value here is defined as the first sensed voltage value (corresponding to step 202).
  • the reference sensing voltage value can be provided for the subsequent detection process, that is, the second state, thereby improving the detection efficiency.
  • the compensation circuit of the pixel unit includes a first switching device, and the driving circuit board can control the first switching device to be turned on or off. After the first switching device is turned on, the driving circuit board can also write pixel data into the driving transistor. In addition, the driving circuit board can also control the turn-on duration of the first switching device, so that the driving transistor can be controlled to work in a linear state or a saturated state.
  • the compensation circuit of the pixel unit includes a second switching device, and the driving circuit board can control the second switching device to be turned on or off. After the second switching device is turned on, the driving circuit board can detect the sensing voltage value of the driving transistor by detecting the second switching device. In this embodiment, the driving circuit board can also turn on the second switching device, and the reset signal is written to the end of the driving transistor connected to the display diode through the second switching device, so as to ensure the accuracy of the pixel data written into the capacitor.
  • step 102 the sensing voltage value of the driving transistor in each pixel unit in the second state is obtained.
  • the driving circuit board in the second state, writes fixed pixel data to the driving transistors in each pixel unit, thereby obtaining the second sensing voltage value of each driving transistor (corresponding to step 301) .
  • the driving transistor works in a linear state, which can be achieved by adjusting the on-time length of the first switching device T1.
  • the driving circuit board writes dynamic pixel data to the driving transistors in each pixel unit.
  • the sensing voltage value can be made equal to the second sensing voltage value, that is, the sensing voltage value can be obtained.
  • the value of the dynamic pixel data when it is equal to the second sensing voltage value (corresponding to step 302).
  • step 103 a compensation parameter of the pixel data of each pixel unit is determined based on the sensing voltage values in the first state and the second state.
  • the driving transistor corresponds to a current formula, namely: This ensures that the display brightness of the display diode and the output current of the drive transistor maintain a linear relationship.
  • the meaning of each parameter in the current formula can refer to related technology, which is not limited here.
  • the driving circuit board can respectively combine the fixed pixel data and the first sensing voltage value, the fixed pixel data and the second sensing voltage value, and the dynamic pixel data and the second sensing voltage value.
  • the group data is substituted into the current formula of the driving transistor to obtain a compensation equation group including three equations (corresponding to step 401).
  • the compensation equation group includes two unknown quantities, the actual threshold voltage of the driving transistor and the current coefficient.
  • the current system is directly proportional to the three parameters of the inter-electrode capacitance (Cox), the coefficient (u) and the width-to-length ratio (W/L) in the current formula.
  • the driving circuit board can determine the values of the two unknown quantities of the actual threshold voltage and the current coefficient based on the compensation equation group, where the compensation parameters include the actual threshold voltage and the current coefficient (corresponding to step 402).
  • the driving circuit board can obtain the first pixel data of each pixel unit in a new frame of picture (corresponding to step 501). Then, the driving circuit board can obtain the product of the first pixel data and the current coefficient, and the sum of the product and the actual threshold voltage is the compensated pixel data (corresponding to step 502). In this way, the drive circuit board can write the compensated pixel data to the drive transistor, and the drive transistor drives the display diode to display corresponding brightness.
  • the sensing voltage values of the driving transistors in each pixel unit of the AMOLED display screen in the first state and the second state are respectively obtained, and then based on the sensing voltage values in the first state and the second state
  • the voltage value determines the compensation parameter of the pixel data of each pixel unit, and the compensation parameter can be used to compensate each pixel data in the subsequent display process.
  • the voltage drift of each pixel unit in the display screen tends to be consistent to ensure the same brightness when the pixel data is the same, which is beneficial to improve the display effect And the user’s viewing experience.
  • FIG. 1 is a circuit diagram of the 3T1C compensation circuit.
  • the 3T1C compensation circuit includes a first switching device T1, a second switching device T3, a driving transistor T2, and a capacitor C1.
  • the control electrode of the driving transistor T2 is connected to the driving circuit board (not shown in the figure) through the first switching device T1, so that the driving circuit board can write pixel data to the control electrode of the driving transistor T2.
  • the first electrode of the driving transistor T2 is connected to the power supply terminal, the second electrode (ie, the source) is connected to the anode of the display diode, and the cathode of the display diode is grounded; at the same time, the second electrode of the driving transistor T2 is connected through the second switching device T3 To the drive circuit board.
  • the driving circuit board is also connected to the control poles of the first switching device T1 and the second switching device T2, and the first switching device T1 (or the second switching device T2) can be controlled to be turned on or off through the control poles.
  • the first switching device T1 after the first switching device T1 is turned on, the pixel data can be written into the driving transistor T2; for another example, after the second switching device T2 is turned on, the sensing voltage value can be collected or a reset signal can be written.
  • FIG. 7 is an embodiment of the present invention for the compensation circuit shown in FIG. A timing diagram
  • FIG. 8 is another timing diagram for the compensation circuit shown in FIG. 6 shown in an embodiment of the present invention.
  • G1 and G2 represent control signals input to the control electrodes of the first switching device T1 and the second switching device T3, respectively
  • DATA represents the pixel data written to the drive transistor T2
  • S represents the drive transistor
  • R represents the reset signal written to the source of the driving transistor T2.
  • the timing diagram shown in FIG. 7 is used to obtain the initial threshold voltage of the driving transistor T2
  • the timing diagram shown in FIG. 8 is used to obtain the sensing voltage value Vsense_line in the non-display process (detection once), and to obtain the display process Sense voltages V1 and V2.
  • the detection process can include three stages t1, t2, and t3. among them:
  • the driving circuit board sends low-level signals to the first switching device T1 and the second switching device T3 respectively to ensure that the first switching device T1 and the second switching device T3 are disconnected.
  • the pixel data DATA cannot be written to The driving transistor T2 and the sense line also cannot detect the sensing voltage value of the driving transistor T2.
  • the driving circuit board sends a high-level signal to the first switching device T1 and the second switching device T3 respectively, turning on the first switching device T1 and the second switching device T3.
  • the pixel data (Vk+Vth) can be Write to the drive transistor T2.
  • the capacitor C1 is charged, and the potential of the first pole of the capacitor C1 (left end in Figure 6) rises.
  • the driving transistor T2 turns off (the potential is lower than that of the driving transistor T2).
  • the threshold voltage) to turn-on the potential exceeds the threshold voltage of the drive transistor T2), the turn-on becomes larger and larger (the potential gets higher and higher), until saturation (the potential exceeds the saturation voltage).
  • the detection line detects The voltage (that is, the sensing voltage value) is also increasing until it is constant, so that the initial threshold voltage V of the driving transistor can be obtained.
  • the driving circuit board sends a low-level signal to the first switching device T1 and the second switching device T3 again to ensure that the first switching device T1 and the second switching device T3 are disconnected. At this time, the pixel data cannot be written to the drive.
  • Vsense_line the sensed voltage value Vsense_line during the non-display process
  • V1 and V2 the sensed voltage V1 and V2 during the display process.
  • the detection process of Vsense_line, V1 and V2 can include 4 stages. t1, t2, t3, and t4. among them:
  • the driving circuit board sends low-level signals to the first switching device T1 and the second switching device T3 respectively to ensure that the first switching device T1 and the second switching device T3 are disconnected.
  • the pixel data DATA cannot be written to While driving the transistor T2, the reset signal cannot be written to the source of the driving transistor T2. Therefore, the sense line cannot detect the sensing voltage value of the driving transistor T2 (that is, the sensing voltage value is 0).
  • the driving circuit board sends high-level signals to the first switching device T1 and the second switching device T3, respectively, to turn on the first switching device T1 and the second switching device T3.
  • the pixel data DATA(Vk+Vth) Can write to the drive transistor T2.
  • the drive circuit board also writes a high-level reset signal to the source of the drive transistor T2, so that the voltage difference between the control electrode and the source voltage of the drive transistor T2 is small and insufficient. So that the driving transistor T2 is turned on.
  • the driving circuit board sends a low-level signal and a high-level signal to the first switching device T1 and the second switching device T3, respectively, to turn off the first switching device T1 and turn on the second switching device T3.
  • Pixel data DATA Vk+Vth
  • a low-level reset signal can be written to the source of the driving transistor T2, so that the voltage difference between the control electrode and the source voltage of the driving transistor T2 is relatively small If large, the driving transistor T2 is turned on, and the voltage of its source rises.
  • the driving circuit board sends a low-level signal to the first switching device T1 and the second switching device T3 respectively to disconnect the first switching device T1 and the second switching device T3, so that the sensing voltage value can be detected.
  • the AMOLED in the first state, the AMOLED is tested once:
  • the pixel data is fixed pixel data.
  • the potential at the node P1 is Vk+Vth.
  • a sensing voltage value ie, the first sensing voltage value
  • Vsense_initial can be detected.
  • the AMOLED in the second state, the AMOLED is detected twice:
  • the pixel data is fixed pixel data, which is the same as the fixed pixel data in the first state, namely Vk+Vth.
  • a sensing voltage value that is, a second sensing voltage value
  • V1 can be detected.
  • the pixel data is dynamic pixel data.
  • the sensing voltage value V2 corresponding to the dynamic pixel data can be the first sensing voltage value in the first state, and the dynamic pixel data at this time can be recorded Value.
  • V sense_initial k1*T(data1-Vth) 2
  • V1 k2*T(data1-Vth1) 2
  • V2 k2*T(data2-Vth1) 2 ;
  • T is the time, that is, the conduction time of the first switching device T1; k1, k2 and Proportionally.
  • the AMOLED display screen can compensate the pixel data every time it is turned on, and display the compensated pixel data, so that the voltage drift of each pixel unit in the display screen tends to be consistent to ensure the same brightness when the pixel data is the same. It helps to improve the display effect and the user's viewing experience.
  • FIG. 9 is a diagram of a device for obtaining pixel data compensation parameters shown in an embodiment of the present invention.
  • an apparatus 900 for obtaining pixel data compensation parameters includes:
  • the first sensing voltage value acquisition module 901 is configured to acquire the sensing voltage value of the driving transistor in each pixel unit in the first state in the AMOLED display screen;
  • the second sensing voltage value acquisition module 902 is used to acquire the sensing voltage value of the driving transistor in each pixel unit in the second state; the sensing voltage value refers to the driving transistor and the display after writing the pixel data The potential value of one end of the diode connection;
  • the compensation parameter determination module 903 is configured to determine the compensation parameter of the pixel data of each pixel unit based on the sensed voltage values in the first state and the second state; Pixel data is compensated.
  • a device for obtaining pixel data compensation parameters corresponds to a method for obtaining pixel data compensation parameters
  • the specific description content can refer to the content of an embodiment of a method for obtaining pixel data compensation parameters, which will not be repeated here.
  • An embodiment of the present invention also provides an AMOLED display panel, wherein the display panel includes an array substrate and a driving circuit board, and the driving circuit board is used to implement the steps of the method described in the embodiments shown in FIGS. 1 to 8.
  • the embodiment of the present invention also provides a readable storage medium, the storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the method described in the embodiment shown in FIGS. 1 to 8 is implemented A step of.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.
  • plurality refers to two or more, unless specifically defined otherwise.

Abstract

一种像素数据补偿参数获取方法及装置、AMOLED显示面板，通过对各像素单元中驱动晶体管（T2）进行阈值电压补偿，从而使显示屏内各像素单元的电压漂移趋于一致以保证在相同像素数据时具有相同的亮度，有利于提升显示效果和用户的观看体验。该像素数据补偿参数获取方法包括：获取AMOLED显示屏内在第一状态下各像素单元中驱动晶体管（T2）的感测电压值（101）；获取在第二状态下各像素单元中驱动晶体管（T2）的感测电压值（102）；感测电压值是指在写入像素数据后驱动晶体管（T2）与显示二极管连接一端的电位值；基于第一状态和第二状态下的感测电压值确定各像素单元的像素数据的补偿参数（103）；补偿参数用于在后续显示过程中对各像素数据进行补偿。

Description

像素数据补偿参数获取方法及装置、AMOLED显示面板
相关申请的交叉引用
本申请要求于2019年2月28日提交的中国专利申请No.201910149355.X的优先权，所公开的内容以引用的方式合并于此。
技术领域
本发明涉及显示技术领域，尤其涉及一种像素数据补偿参数获取方法及装置、AMOLED显示面板。
背景技术
目前，AMOLED(Active-Matrix Organic Light-Emitting Diode，有源矩阵有机发光二极体)显示屏，以其高对比度、高色域、轻薄和可做成柔性屏等优点，得到越来越广泛的应用。
然而，由于工艺、材料及设计等方面的原因，AMOLED显示屏中各像素单元往往均一性不同，长时间使用后，各像素单元中驱动晶体管的阈值电压(Vth)容易产生漂移，从而引起显示效果较差的问题，降低观看体验。
发明内容
本发明提供一种像素数据补偿参数获取方法及装置、AMOLED显示面板，以解决相关技术中由于像素单元中驱动晶体管的阈值电压产生漂移而引起的显示效果较差的问题。
根据本发明实施例的第一方面，提供一种像素数据补偿参数获取方法，包括：
获取AMOLED显示屏内在第一状态下各像素单元中驱动晶体管的感测 电压值；
获取在第二状态下所述各像素单元中驱动晶体管的感测电压值；所述感测电压值是指在写入像素数据后驱动晶体管与显示二极管连接一端的电位值；
基于所述第一状态和所述第二状态下的感测电压值确定各像素单元的像素数据的补偿参数；
所述补偿参数用于在后续显示过程中对各像素数据进行补偿。
可选地，所述第一状态为AMOLED显示屏处于非显示过程中的检测状态；所述第二状态为所述AMOLED显示屏处于显示过程中的检测状态。
可选地，获取AMOLED显示屏内各像素单元中驱动晶体管的感测电压值包括：
分别向所述各像素单元中驱动晶体管写入一固定像素数据；
在所述驱动晶体管工作在饱和状态时，获取所述驱动晶体管的第一感测电压值。
可选地，获取所述各像素单元中驱动晶体管的感测电压值包括：
分别向所述各像素单元中驱动晶体管写入一固定像素数据，以获得各驱动晶体管的第二感测电压值；
分别向所述各像素单元中驱动晶体管写入一动态像素数据，以获得感测电压值与第一感测电压值相等时的动态像素数据的取值。
可选地，基于所述第一状态和所述第二状态下的感测电压值确定各像素单元的像素数据的补偿参数包括：
分别将固定像素数据和第一感测电压值，固定像素数据和第二感测电压值，以及动态像素数据和第二感测电压值代入驱动晶体管的电流公式，得到补偿方程组；所述补偿方程组内包括驱动晶体管的实际阈值电压和电流系数两个未知量；
基于所述补偿方程组确定所述实际阈值电压和所述电流系数，其中所述补偿参数包括所述实际阈值电压和所述电流系数。
可选地，所述方法还包括：
获取到新一帧画面对应的各像素单元的第一像素数据；
获取所述各像素单元的第一像素数据与所述电流系数之积，且所述积与所述实际阈值电压之和，所述和即为补偿后的像素数据。
可选地，所述AMOLED显示屏内各像素单元中驱动晶体管的控制端连接第一开关器件；所述方法还包括：
导通所述第一开关器件，将像素数据写入所述驱动晶体管；
以及通过控制所述第一开关器件的导通时长，控制所述驱动晶体管工作在线性状态或者饱和状态。
可选地，所述驱动晶体管与显示二极管之间的连接处连接第二开关器件；所述方法还包括：
导通所述第二开关器件，获取所述各像素单元中驱动晶体管的感测电压值。
可选地，所述方法还包括：
在向各像素单元中电容写入像素数据的过程中导通所述第二开关器件，以向所述驱动晶体管连接所述显示二极管的一端写入复位信号。
根据本发明实施例的第二方面，提供一种获取像素数据补偿参数的装置，包括：
第一感测电压值获取模块，用于获取AMOLED显示屏内在第一状态下各像素单元中驱动晶体管的感测电压值；
第二感测电压值获取模块，用于获取在第二状态下所述各像素单元中驱动晶体管的感测电压值；所述感测电压值是指在写入像素数据后驱动晶体管与显示二极管连接一端的电位值；
补偿参数确定模块，用于基于所述第一状态和所述第二状态下的感测电压值确定各像素单元的像素数据的补偿参数；所述补偿参数用于在后续显示过程中对各像素数据进行补偿。
根据本发明实施例的第三方面，提供一种AMOLED显示面板，所述显示面板包括阵列基板和驱动电路板，所述驱动电路板用于实现第一方面所述 方法的步骤。
根据本发明实施例的第四方面，提供一种可读存储介质，所述存储介质内存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现第一方面所述方法的步骤。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本发明的实施例，并与说明书一起用于解释本发明的原理。
图1是本发明实施例示出的一种像素数据补偿参数获取方法的流程示意图；
图2是本发明实施例示出的获取第一感测电压值的流程示意图；
图3是本发明实施例示出的获取第二感测电压值的流程示意图；
图4是本发明实施例示出的获取补偿参数的流程示意图；
图5是本发明实施例示出的补偿像素数据的流程示意图；
图6是本发明实施例示出的AMOLED补偿电路的示意图。
图7是本发明实施例示出的用于图6所示补偿电路的一种时序图；
图8是本发明实施例示出的用于图6所示补偿电路的另一种时序图；
图9是本发明实施例示出的一种获取像素数据补偿参数的装置的框图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本发明相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本发明的一些方面相一致的装置和方法的例子。
目前，AMOLED(Active-Matrix Organic Light-Emitting Diode，有源矩阵有机发光二极体)显示屏，以其高对比度、高色域、轻薄和可做成柔性屏等优点，得到越来越广泛的应用。
然而，由于工艺、材料及设计等方面的原因，AMOLED显示屏中各像素单元往往均一性不同，长时间使用后，各像素单元中驱动晶体管的阈值电压(Vth)容易产生漂移，从而引起显示效果较差的问题，降低观看体验。
为此，本发明实施例提供了一种像素数据补偿参数获取方法，其发明构思在于，获取AMOLED显示屏在至少两个工作状态下所检测的像素单元中驱动晶体管的感测电压值，基于多组感测电压值和电流公式的关系可以确定出补偿参数。在后续显示过程中，可以利用各像素单元可以利用补偿参数调整自身的像素数据，达到所有像素单元显示效果趋于一致的效果。
图1是本发明实施例示出的一种像素数据补偿参数获取方法的流程示意图，参见图1，一种像素数据补偿参数获取方法，可以用于AMOLED中驱动电路板，包括步骤101～步骤103，其中：
在步骤101中，获取AMOLED显示屏内在第一状态下各像素单元中驱动晶体管的感测电压值。
本实施例中，AMOLED显示屏可以工作在不同过程，例如非显示过程和显示过程。结合上述方法实现时对应的过程，定义了第一状态和第二状态，其中第一状态为AMOLED显示屏处于非显示过程中的检测状态；第二状态为AMOLED显示屏处于显示过程中的检测状态。
另外，本实施例中，感测电压值是指在写入像素数据后驱动晶体管与显示二极管连接一端的电位值。
参见图2，本实施例中，在第一状态下，驱动电路板分别向各像素单元中驱动晶体管写入一固定像素数据(对应步骤201)。在持续写入固定像素数据的过程中，驱动晶体管可以从线性状态切换到饱和状态的工作状态，在驱动晶体管工作在饱和状态时，获取驱动晶体管的感测电压值。为方便描述，将此处的感测电压值定义为第一感测电压值(对应步骤202)。
需要说明的是，本实施例中，通过在第一状态下检测驱动晶体管的阈值电压以获取感测电压值，可以为后续检测过程即第二状态提供参照感测电压值，从而提高检测效率。
可理解的是，本实施例中，像素单元的补偿电路中包括第一开关器件，驱动电路板可以控制第一开关器件导通或者断开。在导通第一开关器件后，驱动电路板还可以将像素数据写入驱动晶体管。并且，驱动电路板还可以控制第一开关器件的导通时长，从而可以控制驱动晶体管工作在线性状态或者饱和状态。
可理解的是，本实施例中，像素单元的补偿电路中包括第二开关器件，驱动电路板可以控制第二开关器件导通或者断开。在导通第二开关器件后，驱动电路板可以通过检测到第二开关器件检测到驱动晶体管的感测电压值。在本实施例中，驱动电路板还可以导通第二开关器件，通过第二开关器件向驱动晶体管连接显示二极管的一端写入复位信号，从而保证写入到电容中的像素数据的准确度。
在步骤102中，获取在第二状态下所述各像素单元中驱动晶体管的感测电压值。
参见图3，本实施例中，在第二状态下，驱动电路板分别向各像素单元中驱动晶体管写入一固定像素数据，从而获得各驱动晶体管的第二感测电压值(对应步骤301)。需要说明的是，步骤301中驱动晶体管工作在线性状态，可以通过调整第一开关器件T1的导通时长来实现。之后，驱动电路板分别向各像素单元中驱动晶体管写入一动态像素数据，通过调整动态像素数据的大小，可以使感测电压值与第二感测电压值相等，即可以获得感测电压值与第二感测电压值相等时的动态像素数据的取值(对应步骤302)。
在步骤103中，基于所述第一状态和所述第二状态下的感测电压值确定各像素单元的像素数据的补偿参数。
实际应用中，驱动晶体管对应一电流公式，即：
Figure PCTCN2019127866-appb-000001
从而保证显示二极管的显示亮度与驱动晶体管的输出电流保持线性关系。其中，电流公式中的各参数含义可以参见相关技术，在此不作限定。
参见图4，基于上述电流公式，驱动电路板可以分别将固定像素数据和 第一感测电压值，固定像素数据和第二感测电压值，以及动态像素数据和第二感测电压值共三组数据代入驱动晶体管的电流公式，得到一个包括三个等式的补偿方程组(对应步骤401)。其中，补偿方程组内包括驱动晶体管的实际阈值电压和电流系数两个未知量。电流系统与电流公式中的极间电容(Cox)、系数(u)以及宽长比(W/L)三个参数成正比例关系。
继续参见图4，驱动电路板可以基于补偿方程组可以确定出实际阈值电压和电流系数两个未知量的取值，其中补偿参数包括实际阈值电压和电流系数(对应步骤402)。
参见图5，在一实施例中，AMOLED显示屏开始显示后，驱动电路板可以获取到新一帧画面中各像素单元的第一像素数据(对应步骤501)。然后，驱动电路板可以获取第一像素数据与电流系数之积，且该积和实际阈值电压之和，该和即为补偿后的像素数据(对应步骤502)。这样，驱动电路板可以将补偿后的像素数据写入到驱动晶体管，由驱动晶体管驱动显示二极管显示相应的亮度。
至此，本实施例中分别获取AMOLED显示屏在第一状态下和第二状态下各像素单元中驱动晶体管的感测电压值，然后基于所述第一状态和所述第二状态下的感测电压值确定各像素单元的像素数据的补偿参数，在后续显示过程中可以利用补偿参数对各像素数据进行补偿。这样，本实施例中通过对各像素单元中驱动晶体管进行阈值电压补偿，从而使显示屏内各像素单元的电压漂移趋于一致以保证在相同像素数据时具有相同的亮度，有利于提升显示效果和用户的观看体验。
为实现本发明实施例提供的一种像素数据补偿参数获取方法的实现性和优越性，以3T1C补偿电路为例描述各实施例的方案，图1是3T1C补偿电路的电路图。
参见图6，该3T1C补偿电路包括第一开关器件T1、第二开关器件T3、驱动晶体管T2以及电容C1。其中，驱动晶体管T2的控制极通过第一开关器件T1连接到驱动电路板(图中未示出)，这样驱动电路板可以将像素数 据写入到驱动晶体管T2的控制极。驱动晶体管T2的第一极连接至电源端，第二极(即源极)连接到显示二极管的阳极，显示二极管的阴极接地；同时，驱动晶体管T2的第二极连接通过第二开关器件T3连接至驱动电路板。
另外，驱动电路板还与第一开关器件T1和第二开关器件T2的控制极连接，通过控制极可以控制第一开关器件T1(或第二开关器件T2)导通或断开。例如，在导通第一开关器件T1后，可以将像素数据写入驱动晶体管T2；又如，在导通第二开关器件T2后，可以采集到感测电压值或者写入复位信号。
需要说明的是，本发明实施例中，在获取图6所示补偿电路的感测电压值时，需要两种时序，图7是本发明实施例示出的用于图6所示补偿电路的一种时序图；图8是本发明实施例示出的用于图6所示补偿电路的另一种时序图。其中，图7和图8中，G1、G2分别表示输入到第一开关器件T1和第二开关器件T3的控制极的控制信号，DATA表示写入到驱动晶体管T2的像素数据，S表示驱动晶体管T2的源极的电压(即感测电压值)，R表示写入到驱动晶体管T2的源极的复位信号。
其中，图7所示的时序图用于获取驱动晶体管T2的初始阈值电压，图8所示的时序图用于获取在非显示过程中感测电压值Vsense_line(检测一次)，以及获取显示过程中感测电压V1和V2。
参见图7，本时序下，可以用于获取驱动晶体管T2的初始阈值电压，检测一次。检测过程可以包括3个阶段t1、t2和t3。其中：
在t1阶段，驱动电路板分别向第一开关器件T1和第二开关器件T3发送低电平信号，保证第一开关器件T1和第二开关器件T3断开，此时像素数据DATA无法写入到驱动晶体管T2，并且检测线(Sense line)也无法检测到驱动晶体管T2的感测电压值。
在t2阶段，驱动电路板分别向第一开关器件T1和第二开关器件T3发送高电平信号，导通第一开关器件T1和第二开关器件T3，此时像素数据(Vk+Vth)可以写入到驱动晶体管T2。在写入像素数据的过程中，电容C1 被充电，电容C1第一极(图6中左端)的电位升高，在升高的过程中，驱动晶体管T2依次从断开(电位小于驱动晶体管T2的阈值电压)到导通(电位超过驱动晶体管T2的阈值电压)，导通程度越来越大(电位越来越高)，直至饱和(电位超过饱和电压)，此过程中，检测线所检测的电压(即感测电压值)也越来越大直至恒定不变，从而可以得到驱动晶体管的初始阈值电压V。
在t3阶段，驱动电路板重新向第一开关器件T1和第二开关器件T3发送低电平信号，保证第一开关器件T1和第二开关器件T3断开，此时像素数据无法写入到驱动晶体管T2。由于电容C1中存储电量，节点P1处电位为Vk+Vth，驱动晶体管仍然饱和导通，这样检测线(Sense line)仍然可以检测到驱动晶体管T2的感测电压值。
参见图8，本时序下，可以用于获取在非显示过程中感测电压值Vsense_line，获取显示过程中感测电压V1和V2，其中Vsense_line、V1和V2各检测一次检测过程可以包括4个阶段t1、t2、t3和t4。其中：
在t1阶段，驱动电路板分别向第一开关器件T1和第二开关器件T3发送低电平信号，保证第一开关器件T1和第二开关器件T3断开，此时像素数据DATA无法写入到驱动晶体管T2，同时复位信号也无法写入到驱动晶体管T2的源极。因此，检测线(Sense line)无法检测到驱动晶体管T2的感测电压值(即感测电压值为0)。
在t2阶段，驱动电路板分别向第一开关器件T1和第二开关器件T3发送高电平信号，导通第一开关器件T1和第二开关器件T3，此时像素数据DATA(Vk+Vth)可以写入到驱动晶体管T2。在写入像素数据的过程中，驱动电路板还将高电平的复位信号写入到驱动晶体管T2的源极，这样驱动晶体管T2的控制极和源极电压之间的电压差较小，不足以使驱动晶体管T2导通。
在t3阶段，驱动电路板分别向第一开关器件T1和第二开关器件T3发送低电平信号和高电平信号，以断开第一开关器件T1和导通第二开关器件T3，此时像素数据DATA(Vk+Vth)无法写入到驱动晶体管T2，低电平的复位 信号可以写入到驱动晶体管T2的源极，这样驱动晶体管T2的控制极和源极电压之间的电压差较大，驱动晶体管T2导通，其源极的电压升高。
若t3阶段时间比较短，则电容C2的第一极的电位可以保证驱动晶体管T2导通，但是不足以使驱动晶体管T2进入饱和状态。若t3阶段时间比较长，则电容C2的第一极的电位可以保证驱动晶体管T2导通且使其进入饱和状态。在t4阶段，驱动电路板分别向第一开关器件T1和第二开关器件T3发送低电平信号，以断开第一开关器件T1和第二开关器件T3，这样可以检测到感测电压值。
本发明实施例中，在第一状态下，对AMOLED进行一次检测：
像素数据为固定像素数据，此时节点P1处电位为Vk+Vth，此情况下可以检测到一个感测电压值(即第一感测电压值)Vsense_initial。
本发明实施例中，在第二状态下，对AMOLED进行两次检测：
第一次，像素数据为固定像素数据，与第一状态下的固定像素数据相同，即Vk+Vth，此情况下可以检测到一个感测电压值(即第二感测电压值)V1。
第二次，像素数据为动态像素数据，通过调整动态像素数据，可以使动态像素数据对应的感测电压值V2为第一状态下的第一感测电压值，记录此时的动态像素数据的取值。
基于上述检测过程，将像素数据和感测电压值代入电流公式，可以得到如下补偿方程组：
V sense_initial＝k1*T(data1-Vth) 2
V1＝k2*T(data1-Vth1) 2
V2＝k2*T(data2-Vth1) 2；
其中，T为时间，即第一开关器件T1的导通时长；k1、k2与
Figure PCTCN2019127866-appb-000002
成正比。
其中，Vsesen_initial＝V2，通过变换可以得到以下等式:
Figure PCTCN2019127866-appb-000003
上述2个等式中包含两个未知量实际阈值电压Vth1和补偿系数K2，从而得到Vth1为：
Figure PCTCN2019127866-appb-000004
将Vth1带入上面等式，可以得到:
Figure PCTCN2019127866-appb-000005
最终，补偿像素数据为：data1＝K2*data+Vth1。
这样，AMOLED显示屏可以在每次开机后，对像素数据进行补偿，显示补偿后的像素数据，使显示屏内各像素单元的电压漂移趋于一致以保证在相同像素数据时具有相同的亮度，有利于提升显示效果和用户的观看体验。
基于上述实施例提供的获取像素数据补偿参数的方法，本发明实施例还提供了一种获取像素数据补偿参数的装置，图9是本发明实施例示出的一种获取像素数据补偿参数的装置的框图，参见图9，一种获取像素数据补偿参数的装置900包括：
第一感测电压值获取模块901，用于获取AMOLED显示屏内在第一状态下各像素单元中驱动晶体管的感测电压值；
第二感测电压值获取模块902，用于获取在第二状态下所述各像素单元中驱动晶体管的感测电压值；所述感测电压值是指在写入像素数据后驱动晶体管与显示二极管连接一端的电位值；
补偿参数确定模块903，用于基于所述第一状态和所述第二状态下的感测电压值确定各像素单元的像素数据的补偿参数；所述补偿参数用于在后续显示过程中对各像素数据进行补偿。
由于一种获取像素数据补偿参数的装置与一种获取像素数据补偿参数的方法相对应，因此具体描述内容可以参考一种获取像素数据补偿参数的方法的实施例的内容，在此不再赘述。
本发明实施例还提供了一种AMOLED显示面板，其中，所述显示面板包括阵列基板和驱动电路板，所述驱动电路板用于实现图1～图8所示实施例所述方法的步骤。
本发明实施例还提供了一种可读存储介质，所述存储介质内存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现图1～图8所示实施例所述方法的步骤。
在本发明中，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。术语“多个”指两个或两个以上，除非另有明确的限定。
本领域技术人员在考虑说明书及实践这里公开的公开后，将容易想到本发明的其它实施方案。本发明旨在涵盖本发明的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本发明的一般性原理并包括本发明未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本发明的真正范围和精神由下面的权利要求指出。
应当理解的是，本发明并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本发明的范围仅由所附的权利要求来限制。

Claims (12)

  1. 一种像素数据补偿参数获取方法，包括：
    获取AMOLED显示屏内在第一状态下各像素单元中驱动晶体管的感测电压值；
    获取在第二状态下所述各像素单元中驱动晶体管的感测电压值；
    基于所述第一状态和所述第二状态下的感测电压值确定各像素单元的像素数据的补偿参数；
    所述感测电压值是指在写入像素数据后驱动晶体管与显示二极管连接一端的电位值；所述补偿参数用于在后续显示过程中对各像素数据进行补偿。
  2. 根据权利要求1所述的方法，其中，所述第一状态为AMOLED显示屏处于非显示过程中的检测状态；所述第二状态为所述AMOLED显示屏处于显示过程中的检测状态。
  3. 根据权利要求1所述的方法，其中，获取AMOLED显示屏内各像素单元中驱动晶体管的感测电压值包括：
    分别向所述各像素单元中驱动晶体管写入一固定像素数据；
    在所述驱动晶体管工作在饱和状态时，获取所述驱动晶体管的第一感测电压值。
  4. 根据权利要求1所述的方法，其中，获取所述各像素单元中驱动晶体管的感测电压值包括：
    分别向所述各像素单元中驱动晶体管写入一固定像素数据，以获得各驱动晶体管的第二感测电压值；
    分别向所述各像素单元中驱动晶体管写入一动态像素数据，以获得感测电压值与第一感测电压值相等时的动态像素数据的取值。
  5. 根据权利要求3或4所述的方法，其中，基于所述第一状态和所述第二状态下的感测电压值确定各像素单元的像素数据的补偿参数包括：
    分别将固定像素数据和第一感测电压值，固定像素数据和第二感测电压 值，以及动态像素数据和第二感测电压值代入驱动晶体管的电流公式，得到补偿方程组；所述补偿方程组内包括驱动晶体管的实际阈值电压和电流系数两个未知量；
    基于所述补偿方程组确定所述实际阈值电压和所述电流系数，其中所述补偿参数包括所述实际阈值电压和所述电流系数。
  6. 根据权利要求5所述的方法，其中，还包括：
    获取到新一帧画面对应的各像素单元的第一像素数据；
    获取所述各像素单元的第一像素数据与所述电流系数之积，且所述积与所述实际阈值电压之和，所述和即为补偿后的像素数据。
  7. 根据权利要求1所述的方法，其中，所述AMOLED显示屏内各像素单元中驱动晶体管的控制端连接第一开关器件；所述方法还包括：
    导通所述第一开关器件，将像素数据写入所述驱动晶体管；
    以及通过控制所述第一开关器件的导通时长，控制所述驱动晶体管工作在线性状态或者饱和状态。
  8. 根据权利要求1所述的方法，其中，所述驱动晶体管与显示二极管之间的连接处连接第二开关器件；所述方法还包括：
    导通所述第二开关器件，获取所述各像素单元中驱动晶体管的感测电压值。
  9. 根据权利要求8所述的方法，其中，所述方法还包括：
    在向各像素单元中电容写入像素数据的过程中导通所述第二开关器件，以向所述驱动晶体管连接所述显示二极管的一端写入复位信号。
  10. 一种获取像素数据补偿参数的装置，其中，包括：
    第一感测电压值获取模块，用于获取AMOLED显示屏内在第一状态下各像素单元中驱动晶体管的感测电压值；
    第二感测电压值获取模块，用于获取在第二状态下所述各像素单元中驱动晶体管的感测电压值；所述感测电压值是指在写入像素数据后驱动晶体管与显示二极管连接一端的电位值；
    补偿参数确定模块，用于基于所述第一状态和所述第二状态下的感测电压值确定各像素单元的像素数据的补偿参数；所述补偿参数用于在后续显示过程中对各像素数据进行补偿。
  11. 一种AMOLED显示面板，其中，所述显示面板包括阵列基板和驱动电路板，所述驱动电路板用于实现权利要求1-9任一项所述方法的步骤。
  12. 一种可读存储介质，其中，所述存储介质内存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现权利要求1-9任一项所述方法的步骤。
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