WO2019196615A1 - 电压补偿方法、装置、显示设备及计算可读存储介质 - Google Patents

电压补偿方法、装置、显示设备及计算可读存储介质 Download PDF

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Publication number
WO2019196615A1
WO2019196615A1 PCT/CN2019/078970 CN2019078970W WO2019196615A1 WO 2019196615 A1 WO2019196615 A1 WO 2019196615A1 CN 2019078970 W CN2019078970 W CN 2019078970W WO 2019196615 A1 WO2019196615 A1 WO 2019196615A1
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Prior art keywords
voltage
picture
target pixel
transition
driving
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PCT/CN2019/078970
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English (en)
French (fr)
Inventor
彭锦涛
彭宽军
秦纬
羊振中
滕万鹏
徐智强
高雪岭
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京东方科技集团股份有限公司
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Priority to US16/613,273 priority Critical patent/US10937368B2/en
Publication of WO2019196615A1 publication Critical patent/WO2019196615A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems

Definitions

  • Embodiments of the present disclosure relate to the field of display technologies, and in particular, to a voltage compensation method, apparatus, display device, and computing readable storage medium.
  • AMOLED Active Matrix Organic Light Emitting Diode
  • OLED Organic Light-Emitting Diode
  • DTFT Driving Thin Film Transistor
  • Some embodiments of the present disclosure provide a voltage compensation method, including:
  • the gray level of the target pixel in the first picture is greater than the gray level of the target pixel in the second picture, and the transition voltage is the target pixel at the first voltage and The driving voltage between the second voltages is described.
  • the determining the voltage compensation value according to the first voltage and the second voltage includes:
  • the threshold voltage separation amount is determined as the voltage compensation value.
  • the determining a transition voltage according to the voltage compensation value and the second voltage, and compensating the second voltage by using the transition voltage includes:
  • the second voltage is compensated by the transition voltage.
  • the compensating the second voltage by using the transition voltage comprises:
  • a voltage adjustment value corresponding to a driving voltage of the target pixel between each adjacent two frames is: 1/N ⁇ V gs
  • N is a positive integer representing the total number of frames of the intermediate frame picture
  • ⁇ V gs represents the difference between the second voltage and the transition voltage
  • the compensating the second voltage by using the transition voltage comprises:
  • the compensating the second voltage by using the transition voltage further includes:
  • the driving voltage of the target pixel After the driving voltage of the target pixel continues to maintain the transition voltage for a preset time, the driving voltage of the target pixel is switched to the second voltage.
  • Some embodiments of the present disclosure provide a voltage compensation apparatus, including:
  • a first determining module configured to determine a first voltage of the target pixel in the first picture
  • a second determining module configured to determine a second voltage of the target pixel in the second screen, where the first screen is switched to obtain the second screen
  • a third determining module configured to determine a voltage compensation value according to the first voltage and the second voltage
  • a voltage compensation module configured to determine a transition voltage according to the voltage compensation value and the second voltage, and compensate the second voltage by using the transition voltage
  • the gray level of the target pixel in the first picture is greater than the gray level of the target pixel in the second picture, and the transition voltage is the target pixel at the first voltage and The driving voltage between the second voltages is described.
  • the third determining module comprises:
  • the first determining sub-module is configured to perform forward and reverse scans on the current-voltage curve of the thin film transistor TFT driving the target pixel according to the first voltage and the second voltage, and calculate according to the scan result The threshold voltage separation amount of the TFT;
  • a second determining submodule configured to determine the threshold voltage separation amount as the voltage compensation value.
  • the voltage compensation module includes:
  • Determining a submodule configured to determine a sum of the voltage compensation value and the second voltage as the transition voltage
  • a voltage compensation sub-module is configured to compensate the second voltage with the transition voltage.
  • the voltage compensation sub-module is configured to insert an intermediate frame picture between the first picture and the second picture, wherein a driving voltage of the target pixel is in each adjacent two frames
  • the corresponding voltage adjustment value is: 1/N ⁇ V gs , where N is a positive integer indicating the total number of frames of the intermediate frame picture, and ⁇ V gs represents the difference between the second voltage and the transition voltage value.
  • the voltage compensation sub-module is configured to switch a driving voltage of the target pixel to the transition voltage to compensate the second voltage.
  • the voltage compensation sub-module is further configured to switch the driving voltage of the target pixel to the second voltage after the driving voltage of the target pixel continues to maintain the transition voltage for a preset time.
  • Some embodiments of the present disclosure provide a display device including any of the voltage compensation devices described above.
  • Some embodiments of the present disclosure provide a display device including: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the computer program is executed by a processor to implement the above A step in a voltage compensation method.
  • Some embodiments of the present disclosure provide a computer readable storage medium configured to store a computer program, wherein the computer program, when executed by a processor, implements steps in any of the voltage compensation methods described above.
  • FIG. 1 is a flowchart of a voltage compensation method according to some embodiments of the present disclosure
  • FIG. 2 is a schematic diagram of an actual current-voltage curve of an OLED provided by some embodiments.
  • FIG. 3 is a schematic diagram of an ideal current-voltage curve of an OLED provided by some embodiments.
  • FIG. 4 is a schematic diagram showing the relationship between operating current and hysteresis provided by some embodiments.
  • FIG. 5 is a schematic diagram of a circuit according to some embodiments of the present disclosure.
  • FIG. 6 is a schematic diagram of a voltage compensation apparatus according to some embodiments of the present disclosure.
  • FIG. 7 is a schematic diagram of a third determining module according to some embodiments of the present disclosure.
  • FIG. 8 is a schematic diagram of a voltage compensation module according to some embodiments of the present disclosure.
  • FIG. 9 is a schematic diagram of a display device according to some embodiments of the present disclosure.
  • the residual image of the AMOLED display refers to the phenomenon that the previous frame remains in the current picture when the previous frame of the display is switched to the current picture.
  • the length of the afterimage is directly related to the performance of a Driving Thin Film Transistor (DTFT).
  • DTFT Driving Thin Film Transistor
  • the DTFT is a TFT device having a function of driving an OLED in an AMOLED.
  • the threshold voltage of the TFT device is different due to the difference in the scanning direction of the gate voltage Vgate of the TFT device (that is, the direction in which the Vgate changes, for example, the Vgate changes from large to small or from small to large).
  • Vth drifts ( ⁇ Vth) which is a hysteresis phenomenon.
  • the driving current when the first pixel in the high grayscale picture is switched to the intermediate grayscale picture is different from the driving current when the second pixel in the low grayscale picture is switched to the same intermediate grayscale picture. That is, when the same gate voltage is input to the two DTFTs, the drain currents (the on-state currents of the DTFTs) of the two DTFTs are different. Since the on-state current of the DTFT determines the display brightness of the pixels in the AMOLED display, the display brightness when the pixels in the high grayscale picture are switched to the intermediate grayscale picture, and the pixels in the low grayscale picture are switched to the same intermediate grayscale picture. The display brightness is different, resulting in an afterimage of the AMOLED display.
  • some embodiments of the present disclosure provide a voltage compensation method including steps 101, 102, 103, and 104.
  • step 101 a first voltage of the target pixel in the first picture is determined.
  • step 102 a second voltage of the target pixel in the second picture is determined, wherein the second picture is obtained after the first picture switches the picture.
  • the gray level of the target pixel in the first picture is greater than the gray level of the target pixel in the second picture.
  • the target pixel is any pixel, and one pixel is a single-color light-emitting unit (for example, R pixel, G pixel, or B pixel), and pixels of multiple colors constitute one pixel unit, for example, R pixel, G pixel, and B pixel. Form a pixel unit.
  • step 103 a voltage compensation value is determined according to the first voltage and the second voltage.
  • step 103 includes: performing a forward-and-reverse current-voltage curve (IV curve) of the TFT (ie, DTFT) driving the target pixel according to the first voltage and the second voltage, respectively. Scanning, and calculating a threshold voltage separation amount of the DTFT according to the scan result; and determining a threshold voltage separation amount of the DTFT as the voltage compensation value.
  • step 104 a transition voltage is determined according to the voltage compensation value and the second voltage, and the second voltage is compensated by using the transition voltage.
  • the transition voltage is a driving voltage of the target pixel between the first voltage and the second voltage, that is, the value of the transition voltage is located at the first voltage and the second Between voltages.
  • the first voltage and the second voltage are driving voltages of the target pixel, that is, data voltage signals written by the driving chip.
  • step 104 includes using the sum of the voltage compensation value and the second voltage as the transition voltage and compensating the second voltage with the transition voltage.
  • the compensating the second voltage by using the transition voltage comprises directly compensating the second voltage by using the transition voltage, that is, driving the target pixel A voltage is switched to the transition voltage to compensate for the second voltage.
  • the grayscale of the pixel is held for a shorter time than the grayscale of the pixel in the statically displayed picture.
  • the longer the gray scale of the pixel is held the smaller the hysteresis, that is, the smaller the threshold voltage separation amount.
  • the compensating the second voltage by using the transition voltage comprises: inserting an intermediate frame picture between the first picture and the second picture, where The voltage adjustment value of the driving voltage of the target pixel between each adjacent two frames is: 1/N ⁇ V gs , where N is a positive integer, indicating the total number of frames of the intermediate frame picture, ⁇ V gs represents a difference between the second voltage and the transition voltage.
  • the second voltage is compensated by inserting the intermediate frame picture, and the afterimage is reduced or avoided.
  • the threshold voltage separation amount of the DTFT is -0.2 V, and an afterimage appears in the display screen.
  • the high grayscale picture is switched to the intermediate grayscale picture, and an N frame intermediate frame picture is inserted between the high gray level picture and the intermediate gray level picture.
  • the voltage adjustment value of the driving voltage of the target pixel between each adjacent two frames is: 1/N ⁇ V gs , in the i-th intermediate frame picture
  • the driving voltage of the pixel P H (the driving voltage of the pixel in the high gray scale picture - the driving voltage of the pixel in the intermediate gray scale picture) + 1 / N ⁇ ⁇ V gs ⁇ (N + 1 - i).
  • the driving voltage of the pixel P H in the fourth intermediate frame picture is -3V +
  • the inserted intermediate frame picture is one or more frames.
  • the voltage compensation value is determined according to the first voltage before the target pixel screen switching and the second voltage after the screen switching, and is determined according to the voltage compensation value and the second voltage. a transition voltage that compensates for the second voltage using the transition voltage. Since the gray level of the target pixel in the picture before the switching (the first picture) is greater than the gray level of the target picture in the switched picture (the second picture) (ie, the target pixel is high The grayscale screen is switched to the low grayscale image), and the second voltage is compensated to reduce or avoid the short-term residual image of the OLED due to hysteresis.
  • the OLED in an AMOLED is a current-driven device that is sensitive to current.
  • the black pixel gray scale picture is switched to gray ash P b
  • the driving current when the order picture (the voltage corresponding to the gray gray scale picture is Vgs1) is I A (for example, the drain current of the DTFT connected to the OLED in FIG. 5); the pixel P w in the white gray scale picture is switched to the same gray gray level
  • the driving current at the time of the picture is I B , and I A and I B have a current difference ⁇ I drain .
  • the OLED display is current-driven, when I A and I B have a current difference ⁇ I drain , the display luminance of the pixel P b driven by the I A is different from the display luminance of the pixel P w driven by the I B , causing an afterimage.
  • different gray levels (ie, different brightness) of pixels in an AMOLED display correspond to different driving voltages
  • a driving voltage of a pixel corresponding to 255 gray levels is V 255
  • a driving voltage of a pixel corresponding to a gray level of 125 is V 125 , 0 gray scale
  • the driving voltage of the corresponding pixel is V 0 .
  • the display voltage of the pixel varies between V 0 and V 255 to display a picture with different brightness.
  • the driving voltage of the pixel changes between V 0 and V 255
  • the gate voltage of the DTFT driving the pixel also changes between V 255 and V 0 .
  • the ideal TFT device whether it is gradually reduced from V 255 to V 0 (forward scan), or V 0 is gradually increased to V 255 (reverse scan), the current-voltage curve of the TFT (ie, the drain of the TFT)
  • the current-TFT gate-source voltage curve should be coincident, that is, as shown in FIG. 3, the current-voltage curves of the TFTs obtained by the forward scanning and the reverse scanning are coincident.
  • the current-voltage curves obtained by forward scan and reverse scan do not coincide.
  • curve 1 is the current-voltage curve obtained by forward scan
  • curve 2 is obtained by reverse scan.
  • the current-voltage curve the same driving voltage corresponds to different currents, that is, the same driving voltage produces different brightness, and thus a short-term afterimage is generated.
  • the corresponding voltage value of the current I in the curve 1 is V11
  • the corresponding voltage value of the current I in the curve 2 is V22
  • the threshold voltage separation amount is V22-V11.
  • the screen display screen is switched to the middle grayscale screen (the grayscale of the pixels in the middle grayscale screen is a positive integer greater than 0 and less than 255), the middle grayscale screen
  • the driving voltage of all the pixels in the clock is Vgs1'
  • the driving current when the pixel M1 in the black checkerboard switches to the intermediate grayscale picture and the driving current when the pixel M2 in the white checkerboard switches to the intermediate grayscale picture have a current difference ⁇ Id1
  • the display brightness of the pixel M1 and the pixel M2 is different, as if the afterimage of the checkerboard is still present on the display.
  • the driving current of the pixel in the high grayscale picture switched to the intermediate grayscale picture and the driving current of the pixel switched to the intermediate grayscale picture in the low grayscale picture are the same or close.
  • the driving current of the pixel in the high grayscale picture switched to the intermediate grayscale picture and the driving current of the pixel switched to the intermediate grayscale picture in the low grayscale picture are set to the same value, including: the high grayscale picture is to be The driving voltage V1 of the pixel P1 is switched to Vgs2, and the driving voltage of the pixel P2 in the low grayscale picture is switched to Vgs1, V1>Vgs2>Vgs1, thereby ensuring the driving current of the pixel P1 and the pixel in the low grayscale picture in the high grayscale picture.
  • the driving current of P2 is the same; the driving voltage of the pixel P1 is switched from Vgs2 to Vgs1, thereby alleviating the afterimage due to the hysteresis.
  • the transition picture after switching the high gray scale picture to the transition picture (ie, switching the driving voltage V1 of the pixel P1 in the high gray level picture to the transition voltage Vgs2), the transition picture is continuously displayed 16.67 ms (ie, After the driving voltage of the pixel P1 continues to maintain the transition voltage of 16.67 ms), the driving voltage of the pixel P1 is switched to Vgs1.
  • a multi-frame intermediate frame picture is inserted between the high-gray picture and the intermediate gray-scale picture, and the multi-frame intermediate frame picture is displayed, and then switched to the intermediate gray-scale picture (middle gray-scale picture)
  • the driving voltage of the pixel in the picture is Vgs1), and the voltage between the adjacent two frames is switched to (1/N) ⁇ (Vgs1-Vgs2), where Vgs2 is a transition voltage and N represents the multi-frame intermediate frame picture.
  • the total number of frames is Vgs1
  • the operating current (the on-state current of the DTFT) of the DTFT driving the OLED in the AMOLED display is related to ELVDD, the driving voltage Vdata of the pixel, and the threshold voltage Vth of the driving thin film transistor.
  • Vdata ie, the driving voltage of the pixel
  • Vgs can be controlled by Vdata, thereby controlling the current of the DTFT (that is, the intensity of the screen brightness).
  • Figure 4 shows the relationship between the operating current (on-state current) of the TFT and the hysteresis.
  • the hysteresis size changes little (for example, ⁇ Vth is less than 0.045V in Figure 4). Therefore, in some embodiments, the same ⁇ V gs (ie, Vgs1-Vgs2) is utilized to voltage compensate the DTFT driving the pixel.
  • the voltage compensation value ⁇ V gs is a constant value threshold voltage separation amount.
  • the data signal (ie, Vdata) of the pixel circuit when the high gray scale picture is switched to the low gray level picture is performed by using the peripheral chip signal. Voltage compensation.
  • the voltage hysteresis characteristic of the TFT is utilized to perform voltage compensation on the data signal of the pixel circuit, thereby alleviating the short-term afterimage and improving the image display effect.
  • the voltage compensation device includes a first determining module 601 , a second determining module 602 , a third determining module 603 , and a voltage compensation module 604 .
  • the first determining module 601 is configured to determine a first voltage of the target pixel in the first picture.
  • the second determining module 602 is configured to determine a second voltage of the target pixel in the second picture, wherein the second picture is obtained after the first picture switches the picture.
  • the third determining module 603 is configured to determine a voltage compensation value based on the first voltage and the second voltage.
  • the voltage compensation module 604 is configured to determine a transition voltage according to the voltage compensation value and the second voltage, and compensate the second voltage by using the transition voltage.
  • a gray scale of the target pixel in the first picture is greater than a gray level of the target pixel in the second picture, and the transition voltage is the target pixel at the first voltage and the first The driving voltage between the two voltages.
  • the third determining module 603 includes a first determining submodule 6031 and a second determining submodule 6032.
  • the first determining submodule 6031 is configured to perform forward and reverse scans on the current-voltage curve of the thin film transistor TFT driving the target pixel according to the first voltage and the second voltage, and calculate according to the scan result.
  • the TFT threshold voltage separation amount is configured to perform forward and reverse scans on the current-voltage curve of the thin film transistor TFT driving the target pixel according to the first voltage and the second voltage, and calculate according to the scan result.
  • the TFT threshold voltage separation amount is configured to perform forward and reverse scans on the current-voltage curve of the thin film transistor TFT driving the target pixel according to the first voltage and the second voltage, and calculate according to the scan result.
  • the TFT threshold voltage separation amount is configured to perform forward and reverse scans on the current-voltage curve of the thin film transistor TFT driving the target pixel according to the first voltage and the second voltage, and calculate according to the scan result.
  • the second determination sub-module 6032 is configured to determine the calculated threshold voltage separation amount as the voltage compensation value.
  • the voltage compensation module 604 includes a third determination sub-module 6041 and a voltage compensation sub-module 6042.
  • the third determining sub-module 6041 is configured to determine a sum of the voltage compensation value and the second voltage as the transition voltage.
  • the voltage compensation sub-module 6042 is configured to compensate the second voltage with the transition voltage.
  • the voltage compensation sub-module 6042 is configured to insert an intermediate frame picture between the first picture and the second picture, wherein a driving voltage of the target pixel is in each adjacent two frames
  • the corresponding voltage adjustment value is: 1/N ⁇ V gs , where N is a positive integer indicating the total number of frames of the intermediate frame picture, and ⁇ V gs represents the difference between the second voltage and the transition voltage value.
  • the number of intermediate frame pictures is greater than one.
  • the voltage compensation sub-module 6042 is configured to switch a driving voltage of the target pixel to the transition voltage to compensate the second voltage.
  • the voltage compensation submodule 6042 is further configured to switch the driving voltage of the target pixel to the second voltage after the driving voltage of the target pixel continues to maintain the transition voltage for a preset time.
  • the preset time is 16.67ms.
  • the voltage compensation value is determined according to the first voltage and the second voltage of the target pixel, and the transition voltage is determined according to the voltage compensation value and the second voltage, and the voltage is utilized.
  • the compensation value compensates for the second voltage. Since the grayscale of the target pixel in the first picture is greater than the grayscale of the target pixel in the second picture, that is, when switching from a high grayscale picture to a low grayscale picture, The voltage is compensated to reduce or avoid short-term residual images of the OLED due to hysteresis.
  • Some embodiments of the present disclosure provide a display device, wherein the display device includes the voltage compensation device shown in any of FIGS. 6-8.
  • a display device of an embodiment of the present disclosure includes a memory 901, a processor 902, and a computer program stored on the memory 901 and executable on the processor; the computer program is executed by a processor The following process is implemented:
  • the gray level of the target pixel in the first picture is greater than the gray level of the target pixel in the second picture, and the transition voltage is the target pixel at the first voltage and The driving voltage between the second voltages is described.
  • the computer program when executed by the processor 901, is further configured to implement the following process:
  • the threshold voltage separation amount is determined as the voltage compensation value.
  • the computer program when executed by the processor 901, is further configured to implement the following process:
  • the second voltage is compensated by the transition voltage.
  • the computer program when executed by the processor 901, is further configured to implement the following process:
  • a voltage adjustment value corresponding to a driving voltage of the target pixel between each adjacent two frames is: 1/N ⁇ V gs
  • N is a positive integer representing the total number of frames of the intermediate frame picture
  • ⁇ V gs represents the difference between the second voltage and the transition voltage
  • the computer program when executed by the processor 901, is further configured to implement the following process:
  • the computer program when executed by the processor 901, is further configured to implement the following process:
  • the driving voltage of the target pixel After the driving voltage of the target pixel continues to maintain the transition voltage for a preset time, the driving voltage of the target pixel is switched to the second voltage.
  • the gray level of the target pixel in the first picture is greater than the gray level of the target pixel in the second picture, and the transition voltage is the target pixel at the first voltage and The driving voltage between the second voltages is described.
  • the determining the voltage compensation value according to the first voltage and the second voltage includes:
  • the threshold voltage separation amount is determined as the voltage compensation value.
  • the determining a transition voltage according to the voltage compensation value and the second voltage, and compensating the second voltage by using the transition voltage includes:
  • the second voltage is compensated by the transition voltage.
  • the compensating the second voltage by using the transition voltage comprises:
  • a voltage adjustment value corresponding to a driving voltage of the target pixel between each adjacent two frames is: 1/N ⁇ V gs
  • N is a positive integer representing the total number of frames of the intermediate frame picture
  • ⁇ V gs represents the difference between the second voltage and the transition voltage
  • the compensating the second voltage by using the transition voltage comprises:
  • the compensating the second voltage by using the transition voltage further includes: driving voltage of the target pixel after the driving voltage of the target pixel continues to maintain the transition voltage for a preset time Switching to the second voltage.
  • the disclosed method and apparatus may also be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division, and the actual implementation adopts another division manner, for example, multiple units or components are combined or integrated. Another system, or ignore some features, or not.
  • the mutual coupling or direct coupling or communication connection shown or discussed is an indirect coupling or communication connection through some interface, device or unit, in electrical or mechanical or other form.
  • a plurality of functional units in various embodiments of the present disclosure are integrated in one processing unit, or each functional unit is each disposed in one processing unit, or two or more functional units are integrated in one processing unit .
  • the above integrated processing unit is implemented in the form of hardware or in the form of hardware plus software functional units.
  • the processing unit implemented in software as described above is stored in a computer readable storage medium.
  • the functional unit implemented by the above software form is stored in a storage medium, and includes a plurality of instructions arranged such that a computer device (which may be a personal computer, a server, or a network device, etc.) performs voltage compensation as described in any one of the embodiments of the present disclosure.
  • the steps of the method includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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Abstract

提供了一种电压补偿方法、装置、显示设备及计算可读存储介质。所述电压补偿方法，包括：确定目标像素在第一画面中的第一电压；确定所述目标像素在第二画面中的第二电压，其中，所述第一画面切换画面后得到所述第二画面；根据所述第一电压和所述第二电压确定电压补偿值；以及根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿。所述目标像素在所述第一画面中的灰阶大于所述目标像素在所述第二画面中的灰阶，以及所述过渡电压为所述目标像素在所述第一电压和所述第二电压的之间的驱动电压。

Description

电压补偿方法、装置、显示设备及计算可读存储介质
相关申请的交叉引用
本申请主张在2018年4月13日在中国提交的中国专利申请号No.201810329804.4的优先权，其全部内容通过引用包含于此。
技术领域
本公开实施例涉及显示技术领域，尤其涉及一种电压补偿方法、装置、显示设备及计算可读存储介质。
背景技术
有源矩阵有机发光二极管(Active Matrix Organic Light Emitting Diode，AMOLED)面板的应用越来越广泛。AMOLED面板的像素显示器件为有机发光二极管(Organic Light-Emitting Diode，OLED)。驱动薄膜晶体管(Driving Thin Film Transistor，DTFT)在饱和状态下产生驱动电流，该驱动电流驱动OLED发光，从而驱动AMOLED面板发光。
发明内容
本公开一些实施例提供一种电压补偿方法，包括：
确定目标像素在第一画面中的第一电压；
确定所述目标像素在第二画面中的第二电压，其中，所述第一画面切换画面后得到所述第二画面；
根据所述第一电压和所述第二电压确定电压补偿值；以及
根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿；
其中，所述目标像素在所述第一画面中的灰阶大于所述目标像素在所述第二画面中的灰阶，以及所述过渡电压为所述目标像素在所述第一电压和所述第二电压的之间的驱动电压。
一些实施例中，所述根据所述第一电压和所述第二电压确定电压补偿值， 包括：
根据所述第一电压和所述第二电压，分别对驱动所述目标像素的薄膜晶体管TFT的电流-电压曲线进行正向、反向扫描，并根据扫描结果计算所述TFT的阈值电压分离量；以及
将所述阈值电压分离量确定为所述电压补偿值。
一些实施例中，所述根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿，包括：
将所述电压补偿值与所述第二电压的和，确定为所述过渡电压；以及
利用所述过渡电压对所述第二电压进行补偿。
一些实施例中，所述利用所述过渡电压对所述第二电压进行补偿，包括：
在所述第一画面和所述第二画面之间插入中间帧画面，其中，所述目标像素的驱动电压在每相邻两帧画面之间对应的电压调整值为：1/N×ΔV gs，其中N为正整数，表示所述中间帧画面的总帧数，以及ΔV gs表示所述第二电压和所述过渡电压之间的差值。
一些实施例中，所述利用所述过渡电压对所述第二电压进行补偿，包括：
将所述目标像素的驱动电压切换至所述过渡电压，以对所述第二电压进行补偿。
一些实施例中，所述利用所述过渡电压对所述第二电压进行补偿，还包括：
所述目标像素的驱动电压持续保持所述过渡电压预设时间后，将所述目标像素的驱动电压切换至所述第二电压。
本公开一些实施例提供一种电压补偿装置，包括：
第一确定模块，设置为确定目标像素在第一画面中的第一电压；
第二确定模块，设置为确定所述目标像素在第二画面中的第二电压，其中，所述第一画面切换画面后得到所述第二画面；
第三确定模块，设置为根据所述第一电压和所述第二电压确定电压补偿值；以及
电压补偿模块，设置为根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿；
其中，所述目标像素在所述第一画面中的灰阶大于所述目标像素在所述第二画面中的灰阶，以及所述过渡电压为所述目标像素在所述第一电压和所述第二电压的之间的驱动电压。
一些实施例中，所述第三确定模块包括：
第一确定子模块，设置为根据所述第一电压和所述第二电压，分别对驱动所述目标像素的薄膜晶体管TFT的电流-电压曲线进行正向、反向扫描，并根据扫描结果计算所述TFT的阈值电压分离量；以及
第二确定子模块，设置为将所述阈值电压分离量确定为所述电压补偿值。
一些实施例中，所述电压补偿模块包括：
确定子模块，设置为将所述电压补偿值和所述第二电压的和，确定为所述过渡电压；以及
电压补偿子模块，设置为利用所述过渡电压对所述第二电压进行补偿。
一些实施例中，所述电压补偿子模块设置为，在所述第一画面和所述第二画面之间插入中间帧画面，其中，所述目标像素的驱动电压在每相邻两帧画面之间对应的电压调整值为：1/N×ΔV gs，其中N为正整数，表示所述中间帧画面的总帧数，以及ΔV gs表示所述第二电压和所述过渡电压之间的差值。
一些实施例中，所述电压补偿子模块设置为，将所述目标像素的驱动电压切换至所述过渡电压，以对所述第二电压进行补偿。
一些实施例中，所述电压补偿子模块还设置为，在所述目标像素的驱动电压持续保持所述过渡电压预设时间后，将所述目标像素的驱动电压切换至所述第二电压。
本公开一些实施例提供一种显示设备，所述显示设备包括上述任一电压补偿装置。
本公开一些实施例提供一种显示设备，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，其中所述计算机程序被处理器执行时实现上述任一电压补偿方法中的步骤。
本公开一些实施例提供一种计算机可读存储介质，设置为存储计算机程序，其中，所述计算机程序被处理器执行时实现如上述任一电压补偿方法中的步骤。
附图说明
图1为本公开一些实施例提供的电压补偿方法的流程图；
图2为一些实施例提供的OLED实际电流-电压曲线示意图；
图3为一些实施例提供的OLED理想电流-电压曲线示意图；
图4为一些实施例提供的工作电流与迟滞之间的关系示意图；
图5为本公开一些实施例提供的电路示意图；
图6为本公开一些实施例提供的电压补偿装置示意图；
图7为本公开一些实施例提供的第三确定模块的示意图；
图8为本公开一些实施例提供的电压补偿模块的示意图；以及
图9为本公开一些实施例提供的显示设备的示意图。
具体实施方式
下面将结合附图和实施例，对本公开的具体实施方式作详细描述。以下实施例设置为说明本公开，但不用来限制本公开的范围。
AMOLED显示器残像，是指显示器中的上一帧画面切换至当前画面时，当前画面中残留了上一帧画面的现象。AMOLED显示器中，残像存在时间的长短与驱动薄膜晶体管(Driving Thin Film Transistor，DTFT)的性能直接相关。
DTFT是具有驱动AMOLED中OLED功能的TFT器件，由于TFT器件的栅极电压Vgate扫描方向(即，Vgate的变化方向，例如，Vgate由大变小或者由小变大)不同，TFT器件的阈值电压Vth发生漂移(ΔVth)，即产生磁滞(Hysteresis)现象。
由于DTFT存在磁滞现象，高灰阶画面中的第一像素切换至中间灰阶画面时的驱动电流，与低灰阶画面中的第二像素切换至同一中间灰阶画面时的驱动电流不同，即，向两个DTFT输入同一栅极电压时，两个DTFT的漏极电流(DTFT的开态电流)不同。由于DTFT的开态电流决定AMOLED显示器中像素的显示亮度，因此，高灰阶画面中的像素切换至中间灰阶画面时的显示亮度，与低灰阶画面中的像素切换至同一中间灰阶画面时的显示亮度不同，导致AMOLED显示器出现残像。
如图1所示，本公开一些实施例提供了电压补偿方法，所述电压补偿方法包括步骤101、步骤102、步骤103以及步骤104。
步骤101中，确定目标像素在第一画面中的第一电压。步骤102中，确定所述目标像素在第二画面中的第二电压，其中，所述第一画面切换画面后得到所述第二画面。
其中，所述目标像素在所述第一画面中的灰阶大于所述目标像素在所述第二画面中的灰阶。所述目标像素是任一像素，一个像素是单一种颜色的发光单元(例如R像素、G像素或B像素)，多种颜色的像素构成一个像素单元，例如，R像素、G像素和B像素构成一个像素单元。当产品模组调试完成后，不同灰阶对应的电压是确定的，因此，目标像素在第一画面中的第一电压和在第二画面中的第二电压可根据相关技术中的方法确定。
步骤103中，根据所述第一电压和所述第二电压确定电压补偿值。
一些实施例中，步骤103包括：根据所述第一电压和所述第二电压，分别对驱动所述目标像素的TFT(即，DTFT)的电流-电压曲线(I-V曲线)进行正向、反向扫描，并根据扫描结果计算DTFT的阈值电压分离量；以及将所述DTFT的阈值电压分离量确定为所述电压补偿值。步骤104中，根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿。
其中，所述过渡电压为所述目标像素在所述第一电压和所述第二电压的之间的驱动电压，即，所述过渡电压的取值位于所述第一电压和所述第二电压之间。
所述第一电压和所述第二电压为所述目标像素的驱动电压，即驱动芯片写入的数据电压信号。
一些实施例中，步骤104包括：将所述电压补偿值和所述第二电压的和，作为所述过渡电压，并利用所述过渡电压对所述第二电压进行补偿。
一些实施例中，在动态显示的画面中，所述利用所述过渡电压对所述第二电压进行补偿包括，直接利用该过渡电压对第二电压进行补偿，即，将所述目标像素的驱动电压切换至所述过渡电压，以对所述第二电压进行补偿。
动态显示的画面中，像素的灰阶保持的时间，比静态显示的画面中像素 的灰阶保持的时间短。像素的灰阶保持的时间越长，迟滞越小，即阈值电压分离量越小。
一些实施例中，在静态显示的画面中，所述利用所述过渡电压对所述第二电压进行补偿包括：在所述第一画面和所述第二画面之间插入中间帧画面，其中，所述目标像素的驱动电压在每相邻两帧画面之间对应的电压调整值为：1/N×ΔV gs，其中N为正整数，表示所述中间帧画面的总帧数，ΔV gs表示所述第二电压和所述过渡电压之间的差值。
在静态显示的画面中，由于连续的几帧画面显示的内容相同，因此，采用插入中间帧画面的方式，对所述第二电压进行补偿，减少或避免了残像。
例如，将高灰阶画面(像素P H的驱动电压为-6V)切换到中间灰阶画面(像素P H的驱动电压为-3V)，以及将低灰阶画面(像素P L的驱动电压为0V)切换至所述中间灰阶画面(像素P L的驱动电压为-3V)时，DTFT的阈值电压分离量为-0.2V，显示画面中出现残像。
在采用上述实施例中的方法中，在显示动态显示画面时，高灰阶画面切换到中间灰阶画面过程中，将所述阈值电压分离量-0.2V作为所述电压补偿值，将所述电压补偿值与中间灰阶画面中像素的驱动电压的和(-3V+(-0.2V)＝-3.2V)确定为所述过渡电压，将像素P H的驱动电压切换至所述过渡电压-3.2V。
在一些实施例中，在显示静态显示画面时，所述高灰阶画面切换到所述中间灰阶画面，在所述高灰阶画面和所述中间灰阶画面之间插入N帧中间帧画面(即第i中间帧画面，i＝1,…N)，目标像素的驱动电压在每相邻两帧画面之间对应的电压调整值为：1/N×ΔV gs，第i中间帧画面中像素P H的驱动电压＝(高灰阶画面中像素的驱动电压-中间灰阶画面中像素的驱动电压)+1/N×ΔV gs×(N+1-i)。
例如，在显示静态显示画面时，所述高灰阶画面切换到所述中间灰阶画面，在所述高灰阶画面和所述中间灰阶画面之间插入4帧中间帧画面(即依次插入第一中间帧画面、第二中间帧画面、第三中间帧画面以及第四中间帧画面)，即，N＝4，目标像素的驱动电压在每相邻两帧画面之间对应的电压调整值为：1/N×ΔV gs＝1/4×(-0.2)＝-0.05V，第一中间帧画面中像素P H的驱 动电压＝-3+(-0.05)×4＝-3.20V，第二中间帧画面中像素P H的驱动电压＝-3V+(-0.05)×3＝-3.15V，第三中间帧画面中像素P H的驱动电压＝-3V+(-0.05)×2＝-3.10V，第四中间帧画面中像素P H的驱动电压＝-3V+(-0.05)×1＝-3.05V，第五帧画面(即所述中间灰阶画面)中像素P H的驱动电压为中间灰阶画面中像素的驱动电压-3V，所述高灰阶画面切换到所述中间灰阶画面的过程中，像素P L的驱动电压始终为中间灰阶画面的驱动电压-3V。
一些实施例中，插入的中间帧画面是一帧或者多帧画面。
在本公开上述实施例中，在画面切换前后，根据目标像素画面切换前的第一电压和画面切换后的第二电压确定电压补偿值，根据所述电压补偿值和所述第二电压，确定过渡电压，利用所述过渡电压对所述第二电压进行补偿。由于所述目标像素在所述切换前的画面(第一画面)中的灰阶大于所述目标像素在所述切换后的画面(第二画面)中的灰阶(即所述目标像素由高灰阶画面切换到低灰阶画面)，对第二电压进行了补偿，减少或避免了由于迟滞现象导致的OLED短期残像，。
如图2所示，AMOLED中的OLED是电流驱动器件，对电流敏感。当不同黑、白灰阶画面切换至灰色灰阶画面时(灰色灰阶画面中像素的驱动电压为Vgs1)，由于驱动像素的DTFT存在迟滞现象，黑灰阶画面中的像素P b切换至灰色灰阶画面(灰色灰阶画面对应的电压为Vgs1)时的驱动电流为I A(例如，图5中连接OLED的DTFT的漏极电流)；白灰阶画面中的像素P w切换至同一灰色灰阶画面时的驱动电流为I B，I A和I B存在电流差ΔI drain。由于OLED显示器是电流驱动，当I A和I B存在电流差ΔI drain时，I A驱动的像素P b的显示亮度和I B驱动的像素P w的显示亮度不同，引发残像。
例如，AMOLED显示器中像素的不同灰阶(即不同亮度)对应不同的驱动电压，255灰阶对应的像素的驱动电压为V 255，125灰阶对应的像素的驱动电压为V 125，0灰阶对应的像素的驱动电压为V 0。显示器件工作时，为显示不同亮度的画面，像素的驱动电压在V 0和V 255之间变化的。像素的驱动电压在V 0和V 255之间变化时，驱动像素的DTFT的栅极电压也在V 255到V 0之间变化。理想的TFT器件，不论是从V 255逐渐减小到V 0(正向扫描)，还是V 0逐渐增大到V 255(反向扫描)，TFT的电流-电压曲线(即，TFT的漏极电流-TFT 的栅源电压曲线)应该是重合的，即如图3所示，正向扫描和反向扫描得到的TFT的电流-电压曲线是重合的。
但由于TFF存在迟滞现象，正向扫描和反向扫描得到的电流-电压曲线不重合，如图2所示，曲线①为正向扫描得到的电流-电压曲线，曲线②为反向扫描得到的电流-电压曲线，同一驱动电压对应不同的电流，即同一驱动电压产生不同的亮度，进而也就产生了短期残像。如图2所示，电流I在曲线①中对应的电压值为V11,电流I在曲线②中对应的电压值为V22，阈值电压分离量＝V22-V11。
例如，当屏幕持续显示黑白棋盘格画面一段时间后，将屏幕的显示画面切换到中间灰阶画面(中间灰阶画面中像素的灰阶为大于0且小于255的正整数)，中间灰阶画面中的所有像素的驱动电压为Vgs1’，黑棋盘格中像素M1切换到中间灰阶画面时的驱动电流和白棋盘格中像素M2切换到中间灰阶画面时的驱动电流存在电流差ΔI drain，导致像素M1和像素M2的显示亮度不同，就好像棋盘格的残影还存在于显示器上。
一些实施例中，为了避免或者减轻残像问题，高灰阶画面中的像素切换到中间灰阶画面的驱动电流和低灰阶画面中像素切换到中间灰阶画面的驱动电流相同或接近。
一些实施例中，高灰阶画面中的像素切换到中间灰阶画面的驱动电流和低灰阶画面中像素切换到中间灰阶画面的驱动电流相同设置为同一数值，包括：将高灰阶画面中像素P1的驱动电压V1切换至Vgs2，低灰阶画面中像素P2的驱动电压切换至Vgs1，V1＞Vgs2＞Vgs1，从而保证高灰阶画面中像素P1的驱动电流和低灰阶画面中像素P2的驱动电流相同；再将像素P1的驱动电压由Vgs2切换至Vgs1，从而缓解由于迟滞导致的残像。
一些实施例中对于动态显示的画面，将高灰阶画面切换至过渡画面(即，将高灰阶画面中像素P1的驱动电压V1切换至过渡电压Vgs2)后，持续显示过渡画面16.67ms(即像素P1的驱动电压持续保持所述过渡电压16.67ms)后，将像素P1的驱动电压切换到Vgs1。
一些实施例中，对于静态显示的画面，在高灰阶画面和中间灰阶画面之间插入多帧中间帧画面，显示所述多帧中间帧画面后再切换到中间灰阶画面 (中间灰阶画面中像素的驱动电压为Vgs1)，相邻两帧画面之间的电压切换为(1/N)×(Vgs1-Vgs2)，其中，Vgs2为过渡电压，N表示所述多帧中间帧画面的总帧数。
参见图5，驱动AMOLED显示器中OLED的DTFT的工作电流(DTFT的开态电流)与ELVDD、像素的驱动电压Vdata及驱动薄膜晶体管的阈值电压Vth有关。即，I＝1/2*μ*Cox*W/L(Vgs-Vth) 2，其中，I为驱动薄膜晶体管DTFT的开态电流，W为驱动薄膜晶体管的沟道宽度，L为驱动薄膜晶体管的沟道长度，μ为场效应迁移率，Cox为单位面积栅绝缘层电容，Cox与栅绝缘层的厚度成反比，Vth为驱动薄膜晶体管的阈值电压，Vgs为驱动薄膜晶体管的栅电极和源电极之间的电压。其中，Vgs＝Vdata-ELVDD，Vdata为芯片写入的电压。
在测试得到电压补偿值ΔV gs后，利用ΔV gs补偿通过芯片写入的Vdata(即像素的驱动电压)，通过Vdata能控制Vgs，进而控制DTFT的电流(也即，画面亮度的强弱)。
图4示出了TFT的工作电流(开态电流)与迟滞大小之间的关系，在OLED器件工作电流范围(0nA～25nA)内，迟滞大小变化很小(例如，图4中ΔVth小于0.045V)，因此，一些实施例中利用相同的ΔV gs(即Vgs1-Vgs2)，对驱动像素的DTFT进行电压补偿。
例如，电压补偿值ΔV gs为一个恒定数值的阈值电压分离量。
一些实施例中，利用图5所示的电路，根据DTFT迟滞大小，利用外围芯片信号，对高灰阶画面切换至低灰阶画面的时的像素电路的数据(Data)信号(即Vdata)进行电压补偿。
上述实施例中，利用TFT迟滞特性稳定的特点，对像素电路的数据信号进行电压补偿，缓解了短期残像，提高了图像显示效果。
如图6所示，本公开一些实施例提供的电压补偿装置包括第一确定模块601、第二确定模块602、第三确定模块603以及电压补偿模块604。
第一确定模块601设置为确定目标像素在第一画面中的第一电压。第二确定模块602设置为确定所述目标像素在第二画面中的第二电压，其中，所述第一画面切换画面后得到所述第二画面。第三确定模块603设置为根据所 述第一电压和所述第二电压确定电压补偿值。电压补偿模块604设置为根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿。
所述目标像素在所述第一画面中的灰阶大于所述目标像素在所述第二画面中的灰阶，以及所述过渡电压为所述目标像素在所述第一电压和所述第二电压的之间的驱动电压。
一些实施例中，如图7所示，所述第三确定模块603包括第一确定子模块6031以及第二确定子模块6032。
第一确定子模块6031设置为根据所述第一电压和所述第二电压，分别对驱动所述目标像素的薄膜晶体管TFT的电流-电压曲线进行正向、反向扫描，并根据扫描结果计算所述TFT阈值电压分离量。
第二确定子模块6032设置为将计算得到的阈值电压分离量确定为所述电压补偿值。
一些实施例中，如图8所示，所述电压补偿模块604包括第三确定子模块6041以及电压补偿子模块6042。
第三确定子模块6041设置为将所述电压补偿值和所述第二电压的和，确定为所述过渡电压。电压补偿子模块6042设置为利用所述过渡电压对所述第二电压进行补偿。
一些实施例中，所述电压补偿子模块6042设置为，在所述第一画面和所述第二画面之间插入中间帧画面，其中，所述目标像素的驱动电压在每相邻两帧画面之间对应的电压调整值为：1/N×ΔV gs，其中N为正整数，表示所述中间帧画面的总帧数，ΔV gs表示所述第二电压和所述过渡电压之间的差值。
一些实施例中，所述中间帧画面的数量大于1。
一些实施例中，所述电压补偿子模块6042设置为，将所述目标像素的驱动电压切换至所述过渡电压，以对所述第二电压进行补偿。
一些实施例中，所述电压补偿子模块6042还设置为，在所述目标像素的驱动电压持续保持所述过渡电压预设时间后，将所述目标像素的驱动电压切换至所述第二电压。
例如，预设时间为16.67ms。
本公开所述装置的工作原理请参照前述方法实施例的描述。
在本公开上述实施例中，在画面切换前后，根据目标像素的第一电压和第二电压确定电压补偿值，根据所述电压补偿值和所述第二电压，确定过渡电压，利用所述电压补偿值对所述第二电压进行补偿。由于所述目标像素在所述第一画面中的灰阶大于所述目标像素在所述第二画面中的灰阶，也即当由高灰阶画面切换到低灰阶画面时，对第二电压进行了补偿，减少或避免了由于迟滞现象导致的OLED短期残像。
本公开一些实施例提供了一种显示设备，其中，该显示设备包括图6-图8任一所示的电压补偿装置。
如图9所示，本公开实施例的显示设备包括：存储器901、处理器902及存储在所述存储器901上并可在所述处理器上运行的计算机程序；所述计算机程序被处理器执行时实现如下过程：
确定目标像素在第一画面中的第一电压；
确定所述目标像素在第二画面中的第二电压，其中，所述第一画面切换画面后得到所述第二画面；
根据所述第一电压和所述第二电压确定电压补偿值；以及
根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿；
其中，所述目标像素在所述第一画面中的灰阶大于所述目标像素在所述第二画面中的灰阶，以及所述过渡电压为所述目标像素在所述第一电压和所述第二电压的之间的驱动电压。
一些实施例中，所述计算机程序被处理器901执行时还设置为实现如下过程：
根据所述第一电压和所述第二电压，分别对驱动所述目标像素的薄膜晶体管TFT的电流-电压曲线进行正向、反向扫描，并根据扫描结果计算所述TFT的阈值电压分离量；以及
将所述阈值电压分离量确定为所述电压补偿值。
一些实施例中，所述计算机程序被处理器901执行时还设置为实现如下过程：
将所述电压补偿值和所述第二电压的和，确定为所述过渡电压；以及
利用所述过渡电压对所述第二电压进行补偿。
一些实施例中，所述计算机程序被处理器901执行时还设置为实现如下过程：
在所述第一画面和所述第二画面之间插入中间帧画面，其中，所述目标像素的驱动电压在每相邻两帧画面之间对应的电压调整值为：1/N×ΔV gs，其中N为正整数，表示所述中间帧画面的总帧数，ΔV gs表示所述第二电压和所述过渡电压之间的差值。
一些实施例中，所述计算机程序被处理器901执行时还设置为实现如下过程：
将所述目标像素的驱动电压切换至所述过渡电压，以对所述第二电压进行补偿。
一些实施例中，所述计算机程序被处理器901执行时还设置为实现如下过程：
所述目标像素的驱动电压持续保持所述过渡电压预设时间后，将所述目标像素的驱动电压切换至所述第二电压。
本公开一些实施例提供了计算机可读存储介质，所述计算机可读存储介质设置为存储计算机程序，所述计算机程序可被处理器执行实现以下步骤：
确定目标像素在第一画面中的第一电压；
确定所述目标像素在第二画面中的第二电压，其中，所述第一画面切换画面后得到所述第二画面；
根据所述第一电压和所述第二电压确定电压补偿值；以及
根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿；
其中，所述目标像素在所述第一画面中的灰阶大于所述目标像素在所述第二画面中的灰阶，以及所述过渡电压为所述目标像素在所述第一电压和所述第二电压的之间的驱动电压。
一些实施例中，所述根据所述第一电压和所述第二电压确定电压补偿值，包括：
根据所述第一电压和所述第二电压，分别对驱动所述目标像素的薄膜晶体管TFT的电流-电压曲线进行正向、反向扫描，并根据扫描结果计算所述TFT的阈值电压分离量；以及
将所述阈值电压分离量确定为所述电压补偿值。
一些实施例中，所述根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿，包括：
将所述电压补偿值与所述第二电压的和，确定为所述过渡电压；以及
利用所述过渡电压对所述第二电压进行补偿。
一些实施例中，所述利用所述过渡电压对所述第二电压进行补偿，包括：
在所述第一画面和所述第二画面之间插入中间帧画面，其中，所述目标像素的驱动电压在每相邻两帧画面之间对应的电压调整值为：1/N×ΔV gs，其中N为正整数，表示所述中间帧画面的总帧数，以及ΔV gs表示所述第二电压和所述过渡电压之间的差值。
一些实施例中，所述利用所述过渡电压对所述第二电压进行补偿，包括：
将所述目标像素的驱动电压切换至所述过渡电压，以对所述第二电压进行补偿。
一些实施例中，所述利用所述过渡电压对所述第二电压进行补偿，还包括：所述目标像素的驱动电压持续保持所述过渡电压预设时间后，将所述目标像素的驱动电压切换至所述第二电压。
在本申请所提供的多个实施例中，应该理解到，所揭露方法和装置，还可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时采用另外的划分方式，例如多个单元或组件结合或者集成到另一个系统，或忽略一些特征，或不执行。
所显示或讨论的相互之间的耦合或直接耦合或通信连接是通过一些接口，装置或单元的间接耦合或通信连接，是电性或机械或其它的形式。
在本公开多个实施例中的多个功能单元都集成在一个处理单元中，或者是每个功能单元各自设置在一个处理单元中，或者两个或两个以上功能单元集成在一个处理单元中。上述集成的处理单元采用硬件的形式实现，或者采 用硬件加软件功能单元的形式实现。
一些实施例中，上述以软件形式实现的处理单元，存储在一个计算机可读取存储介质中。上述软件形式实现的功能单元存储在一个存储介质中，包括多个指令设置为使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本公开任一个实施例中所述电压补偿方法的步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述是本公开的一些实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开所述原理的前提下，还可以作出若干改进和润饰。

Claims (15)

  1. 一种电压补偿方法，包括：
    确定目标像素在第一画面中的第一电压；
    确定所述目标像素在第二画面中的第二电压，其中，所述第一画面切换画面后得到所述第二画面；
    根据所述第一电压和所述第二电压确定电压补偿值；以及
    根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿；
    其中，所述目标像素在所述第一画面中的灰阶大于所述目标像素在所述第二画面中的灰阶，以及所述过渡电压为所述目标像素在所述第一电压和所述第二电压的之间的驱动电压。
  2. 根据权利要求1所述的方法，其中，所述根据所述第一电压和所述第二电压确定电压补偿值，包括：
    根据所述第一电压和所述第二电压，分别对驱动所述目标像素的薄膜晶体管TFT的电流-电压曲线进行正向、反向扫描，并根据扫描结果计算所述TFT的阈值电压分离量；以及
    将所述阈值电压分离量确定为所述电压补偿值。
  3. 根据权利要求1或2所述的方法，其中，所述根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿，包括：
    将所述电压补偿值与所述第二电压的和，确定为所述过渡电压；以及
    利用所述过渡电压对所述第二电压进行补偿。
  4. 根据权利要求3所述的方法，其中，所述利用所述过渡电压对所述第二电压进行补偿，包括：
    在所述第一画面和所述第二画面之间插入中间帧画面，其中，所述目标像素的驱动电压在每相邻两帧画面之间对应的电压调整值为：1/N×ΔV gs，其中N为正整数，表示所述中间帧画面的总帧数，以及ΔV gs表示所述第二电压和所述过渡电压之间的差值。
  5. 根据权利要求3所述的方法，其中，所述利用所述过渡电压对所述第二电压进行补偿，包括：
    将所述目标像素的驱动电压切换至所述过渡电压，以对所述第二电压进行补偿。
  6. 根据权利要求5所述的方法，其中，所述利用所述过渡电压对所述第二电压进行补偿，还包括：
    所述目标像素的驱动电压持续保持所述过渡电压预设时间后，将所述目标像素的驱动电压切换至所述第二电压。
  7. 一种电压补偿装置，包括：
    第一确定模块，设置为确定目标像素在第一画面中的第一电压；
    第二确定模块，设置为确定所述目标像素在第二画面中的第二电压，其中，所述第一画面切换画面后得到所述第二画面；
    第三确定模块，设置为根据所述第一电压和所述第二电压确定电压补偿值；以及
    电压补偿模块，设置为根据所述电压补偿值和所述第二电压，确定过渡电压，并利用所述过渡电压对所述第二电压进行补偿；
    其中，所述目标像素在所述第一画面中的灰阶大于所述目标像素在所述第二画面中的灰阶，以及所述过渡电压为所述目标像素在所述第一电压和所述第二电压的之间的驱动电压。
  8. 根据权利要求7所述的装置，其中，所述第三确定模块包括：
    第一确定子模块，设置为根据所述第一电压和所述第二电压，分别对驱动所述目标像素的薄膜晶体管TFT的电流-电压曲线进行正向、反向扫描，并根据扫描结果计算所述TFT的阈值电压分离量；以及
    第二确定子模块，设置为将所述阈值电压分离量确定为所述电压补偿值。
  9. 根据权利要求7或8所述的装置，其中，所述电压补偿模块包括：
    确定子模块，设置为将所述电压补偿值和所述第二电压的和，确定为所述过渡电压；以及
    电压补偿子模块，设置为利用所述过渡电压对所述第二电压进行补偿。
  10. 根据权利要求9所述的装置，其中，所述电压补偿子模块设置为， 在所述第一画面和所述第二画面之间插入中间帧画面，其中，所述目标像素的驱动电压在每相邻两帧画面之间对应的电压调整值为：1/N×ΔV gs，其中N为正整数，表示所述中间帧画面的总帧数，以及ΔV gs表示所述第二电压和所述过渡电压之间的差值。
  11. 根据权利要求9所述的装置，其中，所述电压补偿子模块设置为，将所述目标像素的驱动电压切换至所述过渡电压，以对所述第二电压进行补偿。
  12. 根据权利要求11所述的装置，其中，所述电压补偿子模块还设置为，在所述目标像素的驱动电压持续保持所述过渡电压预设时间后，将所述目标像素的驱动电压切换至所述第二电压。
  13. 一种显示设备，包括权利要求7-12任一项所述的电压补偿装置。
  14. 一种显示设备，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序；其中，所述计算机程序被处理器执行时实现如权利要求1至6中任一项所述的方法中的步骤。
  15. 一种计算机可读存储介质，设置为存储计算机程序，其中，所述计算机程序被处理器执行时实现如权利要求1至6中任一项所述的方法中的步骤。
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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108538252B (zh) * 2018-04-13 2020-03-27 京东方科技集团股份有限公司 一种电压补偿方法、装置、显示设备及计算可读存储介质
CN110751933B (zh) * 2019-12-04 2021-09-17 京东方科技集团股份有限公司 刷新率切换的显示方法及装置、计算机设备及介质
CN111312167B (zh) * 2020-04-03 2021-05-07 深圳市华星光电半导体显示技术有限公司 电压输出方法、装置、控制器及存储介质
CN112102778B (zh) * 2020-10-10 2022-12-06 京东方科技集团股份有限公司 像素电路及其驱动方法、显示基板和显示装置
CN113362755A (zh) * 2021-06-25 2021-09-07 合肥芯颖科技有限公司 显示数据补偿方法、装置、电子设备及存储介质
CN114299895B (zh) * 2021-12-29 2023-04-07 武汉天马微电子有限公司 显示面板的亮度调节方法及亮度调节装置
CN114694611A (zh) * 2022-01-10 2022-07-01 重庆翰博显示科技研发中心有限公司 一种新型Mini LED显示屏液晶残像处理工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160275869A1 (en) * 2015-03-20 2016-09-22 Samsung Display Co., Ltd. Pixel circuit and display apparatus including the pixel circuit
CN107452334A (zh) * 2017-08-30 2017-12-08 京东方科技集团股份有限公司 像素电路及其驱动方法、显示基板及其驱动方法、显示装置
CN108538252A (zh) * 2018-04-13 2018-09-14 京东方科技集团股份有限公司 一种电压补偿方法、装置、显示设备及计算可读存储介质

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060007209A1 (en) * 2004-04-15 2006-01-12 Toshiba Matsushita Display Technology Co., Ltd. Drive apparatus of liquid crystal panel and liquid crystal display apparatus
TWI286292B (en) * 2005-05-24 2007-09-01 Avision Inc Method for duplex scanning and generating corresponding images
TWI342978B (en) * 2007-10-24 2011-06-01 Au Optronics Corp Active device array substrate, pixel structure thereof and driving method thereof
KR101965258B1 (ko) * 2012-02-17 2019-04-04 삼성디스플레이 주식회사 표시 장치 및 그 구동 방법
TWI449013B (zh) * 2012-05-22 2014-08-11 Au Optronics Corp 顯示裝置及其操作方法
CN105632449B (zh) * 2016-04-06 2018-04-10 京东方科技集团股份有限公司 一种显示面板的伽马电压调节方法及装置
CN105632450B (zh) * 2016-04-07 2019-02-22 京东方科技集团股份有限公司 一种显示面板的校正方法及装置
CN106205523B (zh) * 2016-07-13 2018-09-04 深圳市华星光电技术有限公司 液晶显示装置残像的改善方法及装置
CN107103877B (zh) * 2017-05-15 2019-06-14 京东方科技集团股份有限公司 像素电路及其驱动方法、显示装置
CN107492348B (zh) * 2017-09-20 2020-03-10 深圳市华星光电半导体显示技术有限公司 改善显示面板显示效果的方法和显示面板
CN107610652B (zh) * 2017-09-28 2019-11-19 京东方科技集团股份有限公司 像素电路、其驱动方法、显示面板及显示装置
CN108074513B (zh) * 2017-12-25 2019-10-18 深圳市华星光电技术有限公司 侦测图像中高频成分的方法及装置
US10388235B2 (en) * 2017-12-29 2019-08-20 Shenzhen China Star Optoelectronics Technology Co., Ltd. Display driving method and device
KR102661705B1 (ko) * 2019-02-15 2024-05-02 삼성디스플레이 주식회사 표시 장치 및 표시 장치의 구동 방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160275869A1 (en) * 2015-03-20 2016-09-22 Samsung Display Co., Ltd. Pixel circuit and display apparatus including the pixel circuit
CN107452334A (zh) * 2017-08-30 2017-12-08 京东方科技集团股份有限公司 像素电路及其驱动方法、显示基板及其驱动方法、显示装置
CN108538252A (zh) * 2018-04-13 2018-09-14 京东方科技集团股份有限公司 一种电压补偿方法、装置、显示设备及计算可读存储介质

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