WO2023029515A1 - 显示面板的闪烁调试方法和装置 - Google Patents

显示面板的闪烁调试方法和装置 Download PDF

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Publication number
WO2023029515A1
WO2023029515A1 PCT/CN2022/088193 CN2022088193W WO2023029515A1 WO 2023029515 A1 WO2023029515 A1 WO 2023029515A1 CN 2022088193 W CN2022088193 W CN 2022088193W WO 2023029515 A1 WO2023029515 A1 WO 2023029515A1
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flicker
brightness data
display
display panel
display brightness
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PCT/CN2022/088193
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English (en)
French (fr)
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刘同海
于振坤
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合肥维信诺科技有限公司
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Publication of WO2023029515A1 publication Critical patent/WO2023029515A1/zh
Priority to US18/472,317 priority Critical patent/US20240046838A1/en

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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
    • G09G3/2007—Display of intermediate tones
    • 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
    • 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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0435—Change or adaptation of the frame rate of the video stream
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the embodiments of the present application relate to the field of display technologies, for example, to a method and device for debugging flicker of a display panel.
  • Embodiments of the present application provide a flicker debugging method and device for a display panel, so as to improve the accuracy of flicker degree parameters and improve the effect of improving the flicker phenomenon of the display panel.
  • An embodiment of the present application provides a flicker debugging method for a display panel, including: acquiring a plurality of display brightness data of the display panel within a preset time period; processing the plurality of display brightness data to obtain continuous The plurality of time domain signals displaying brightness data; determining the flickering degree parameter of the display panel according to the rate of change of the display brightness data in the plurality of first time periods among the plurality of time domain signals displaying brightness data; Wherein, the duration of each first time period is determined according to the persistence of vision of the human eye, and the duration of the preset time period is longer than the duration of each first time period; The display panel is debugged.
  • the embodiment of the present application also provides a flicker debugging device for a display panel, including: a brightness data acquisition module configured to acquire a plurality of display brightness data of the display panel within a preset time period; a display brightness data processing module configured to The plurality of display brightness data are processed to obtain time domain signals of the plurality of display brightness data that are continuous in the time domain; the flicker degree parameter determination module is set to The rate of change of the display brightness data within a first time period determines the flicker degree parameter of the display panel; wherein, the duration of each first time period is determined according to the visual persistence time of the human eye, and the preset time The duration of each segment is longer than the duration of each of the first time segments; the debugging module is configured to determine whether to debug the display panel according to the flicker degree parameter.
  • the flicker phenomenon of the display panel is related to the brightness difference when the display screen is switched, the time limit of the display screen switching recognizable by human eyes and the relative degree of display brightness change.
  • the display panel flicker debugging method and device provided in the embodiments of the present application process the display brightness data to obtain a plurality of time domain signals of display brightness data continuous in the time domain, which helps to reduce the difficulty of data processing. Determine the flicker degree parameter of the display panel according to the rate of change of the display luminance data in multiple first time periods in the time domain signals of the multiple display luminance data, and realize the determination of the flicker degree parameter according to the change of the display luminance within the visual persistence time , to improve the accuracy of the flicker parameter.
  • the flickering degree parameters are determined based on the causes of the above-mentioned flickering phenomena, which can make the flickering degree parameters closer to the observation effect of the human eye, thereby improving the accuracy of the flickering degree parameters, and debugging the display panel according to the flickering degree parameters. Helps improve the flickering effect.
  • Fig. 1 is a schematic diagram of a flicker test result
  • FIG. 2 is a schematic flowchart of a method for debugging a display panel flicker provided by an embodiment of the present application
  • FIG. 3 is a schematic flowchart of another method for debugging a display panel flicker provided by an embodiment of the present application
  • Fig. 4 is a schematic diagram of the relationship curve between the refresh frequency and the sensitivity coefficient provided by the embodiment of the present application.
  • FIG. 5 is a schematic diagram of a comparison of display brightness data curves before and after processing provided by an embodiment of the present application
  • FIG. 6 is a schematic diagram of curves of display luminance data at different refresh rates provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a curve of processed display brightness data provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of another method for debugging a display panel flicker provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a comparison curve between gray scale and flicker degree parameters provided by the embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a display panel flicker debugging device provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of another display panel flicker debugging device provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of another display panel flicker debugging device provided by an embodiment of the present application.
  • the display panel can freely switch between different refresh rates.
  • a display panel based on low temperature polycrystalline oxide (Low Temperature Polycrystalline Oxide, LTPO) technology combines low temperature polysilicon (Low Temperature Poly-Silicon, LTPS) transistors and InGa Indium Gallium Zinc Oxide (IGZO) transistors are used in pixel circuits to drive display panels to display at different refresh rates.
  • Low Temperature Polycrystalline Oxide, LTPO low temperature polycrystalline oxide
  • LTPS low temperature polysilicon
  • IGZO InGa Indium Gallium Zinc Oxide
  • the display panel in video mode and game mode, can switch to a refresh rate of 120Hz, and in the standby state, off-screen state, and reading state, the display panel can switch to a refresh rate of 10Hz or even 1Hz.
  • the refresh frequency of the display panel is low, because the switching time of the display screen is prolonged, which exceeds the response time of the human eye, the brightness change when the display screen is written each time can be recognized by the human eye, so that the user can observe the display screen. flashing.
  • Solution 1 Determine the flickering degree of the display panel by visual inspection of human eyes. The efficiency of this solution is low, and it is difficult to accurately quantify the degree of flicker of the display panel.
  • Solution 2 Obtain a frequency domain signal for displaying luminance data, and calculate the flickering degree of the display panel according to the amplitude of the frequency domain signal for displaying luminance data.
  • the degree of flicker obtained by this solution at a low refresh rate does not match the degree of flicker seen by human eyes, and there is a problem that the test accuracy of the degree of flicker is low.
  • FIG. 1 is a schematic diagram of a flicker degree test result, which may be a flicker degree test result obtained by testing a display panel at a refresh rate of 10 Hz by adopting the second scheme.
  • the abscissa represents the gray scale, for example W255 is gray scale 255, W127 is gray scale 127, W87 is gray scale 87, W64 is gray scale 64, W55 is gray scale 55, W48 is gray scale 48, W32 is gray scale 32, W15 It is 15 gray levels, and the vertical axis represents the degree of flicker.
  • the smaller the value of the flickering degree the lighter the flickering degree; the larger the flickering degree value, the more severe the flickering degree. As shown in FIG.
  • the test results show that the degree of flicker at the 48-grayscale is slightly lower than that at the 64-grayscale and 55-grayscale.
  • the degree of flicker at gray scale 48 should be more severe than that at gray scale 64 and gray scale 55.
  • the test results do not match the theoretical and visual results of the human eye. There is the problem of low test accuracy, which is not conducive to the improvement of the flickering phenomenon.
  • FIG. 2 is a schematic flowchart of a method for debugging a display panel flicker provided by an embodiment of the present application. As shown in Figure 2, the method includes the following steps.
  • the display panel may be a light emitting diode (Light Emitting Diode, LED) display panel, an organic light emitting diode (Organic Light-Emitting Diode, OLED) display panel, or a micro light emitting diode (Micro Light Emitting Diode, Micro LED) display panel, etc.
  • the display panel is controlled to display, so as to obtain display brightness data of the display panel within a preset time period.
  • the display panel may be controlled to display at a target grayscale at a preset refresh frequency, and display brightness data within a preset time period may be acquired.
  • S120 Process a plurality of display brightness data to obtain a time domain signal of a plurality of display brightness data continuous in time domain.
  • acquiring a plurality of display brightness data within a preset time period is a time-domain signal for acquiring display brightness data within a preset time period, that is, obtaining a time-domain signal of multiple display brightness data at different times within a preset time period Signal.
  • To process a plurality of display luminance data it is possible to first convert a plurality of display luminance data in the time domain into display luminance data in the frequency domain, that is, frequency domain signals of display luminance data of different frequencies, and then convert the display luminance data in the frequency domain Convert to display luminance data in the time domain to obtain time domain signals of multiple display luminance data at different times within the converted preset time period, so as to convert the messy original display luminance data into stable and continuous time domain Display brightness data to reduce the difficulty of subsequent data processing.
  • the change rate of display brightness data indicates the speed of display brightness data change.
  • the first time period is It is the duration used to determine the speed of display brightness data change.
  • the duration of the first time period is determined according to the duration of vision of human eyes, and the duration of the preset time period is longer than the duration of the first time period.
  • Persistence of vision refers to the phenomenon that the vision produced by light on the retina remains for a period of time after the light stops acting on it.
  • the refresh frequency of the display panel determines the switching time of the display screen.
  • the switching time of the display screen is equal to the visual persistence time, the switching time can be regarded as the critical value that the human eye cannot recognize the flicker phenomenon.
  • the switching time of the display screen is less than or When equal to the duration of vision, the human eye cannot recognize the change of display brightness when the display screen is switched, and when the switching time of the display screen is greater than the duration of vision, the human eye can recognize the change of display brightness when the display screen is switched.
  • Determining the persistence of vision of the human eye as the length of the first time period helps to determine the flicker degree parameters of the display panel according to the human eye's recognition limit for the flicker phenomenon, making the evaluation of the flicker degree closer to the actual situation of the human eye. Observe the effect.
  • the processed time-domain signals of multiple display brightness data include display brightness data at different times within a preset time period.
  • the display brightness data in each first time period in the time-domain signals of multiple display brightness data may be the display brightness data in the first time period starting from any moment in the preset time period, and the display brightness data in the first time period in the preset time period
  • the plurality of display brightness data may include display brightness data within a plurality of first time periods.
  • the display brightness data in the multiple first time periods may include: The display brightness data, the display brightness data within 41.6 milliseconds from the 0.11th second, the display brightness data within 41.6 milliseconds from the 0.12th second, etc. will not be listed one by one.
  • the duration of the preset time period should be as long as possible, so as to obtain as much display brightness data as possible in the first time period, so as to improve the accuracy of the flicker degree parameter.
  • the rate of change of the display luminance data in the plurality of first time periods can reflect the degree of change of the display luminance in the time period.
  • the maximum value of the change rates of the multiple display brightness data may be determined according to the change rates of the display brightness data in multiple first time periods within the preset time period, The maximum value is determined as a flicker degree parameter of the display panel, which represents the flicker degree of the display panel when displaying in the target gray scale at a preset refresh frequency.
  • the average value of the rate of change can be calculated according to the rate of change of a plurality of display brightness data, and the average value is determined as the flickering degree parameter of the display panel, so as to represent the display panel in the preset refresh rate.
  • the degree of flickering when displaying in the target grayscale at the frequency can also be calculated in other ways according to the rate of change of the display brightness data in multiple first time periods, for example, the change of display brightness data in multiple first time periods
  • the weight is set according to the rate, and the flicker degree parameter is calculated by taking an average weighted value, which is not limited in this embodiment of the present application.
  • the flickering degree parameter of the target grayscale is greater than the critical threshold, it is determined that the current flickering degree is unacceptable and the display panel needs to be debugged to improve the flickering of the display panel.
  • the flickering degree parameter of the target gray scale is less than or equal to the critical threshold, it is determined that the current flickering degree is acceptable without debugging the display panel.
  • Flicker improvement method (1) when the flicker of the display panel is unacceptable, the driving timing of the pixel circuit is adjusted. For example, prolonging the data writing time of one frame of display screen, so that the data voltage is fully written into the storage capacitor, so that the storage capacitor can better maintain the voltage of the gate of the driving transistor during the light-emitting phase, so as to improve the display screen of adjacent frames
  • a compensation stage or a precharge stage is added to the driving sequence of the pixel circuit to precharge the storage capacitor before the data writing stage, which also helps to improve the maintenance effect of the storage capacitor on the gate voltage of the drive transistor, thereby Improve flicker phenomenon.
  • Flicker improvement method (2) when the flicker of the display panel is unacceptable, adjust the voltage value of the initialization signal.
  • the initialization signal refers to a signal for initializing the gate of the drive transistor.
  • the leakage current between the initialization signal input terminals is used to avoid the flicker phenomenon caused by the charge of the gate of the driving transistor being discharged through the leakage path when the switching time of the display images of adjacent frames is too long.
  • the power supply voltage may be a power supply voltage (such as ELVDD) electrically connected to the anode of the light emitting device during the light emitting stage.
  • the magnitude of the power supply voltage is related to the magnitude of the display brightness.
  • the flicker phenomenon of the display panel is related to the brightness difference when the display screen is switched, the time limit of the display screen switching recognizable by human eyes, and the relative degree of display brightness change.
  • time domain signals of a plurality of display brightness data continuous in the time domain are obtained, which helps to reduce the difficulty of data processing.
  • This solution synthesizes the causes of the flicker phenomenon to determine the flicker degree parameter, which can make the flicker degree parameter closer to the observation effect of the human eye, thereby improving the accuracy of the flicker degree parameter.
  • the display panel Debugging can also help to improve the improvement effect of the flickering phenomenon.
  • FIG. 3 is a schematic flowchart of another method for debugging a display panel flicker provided by an embodiment of the present application. On the basis of the above embodiments, this embodiment describes the method for debugging the flickering of the display panel. As shown in Figure 3, the method includes the following steps.
  • a signal generator (Pattern Generator, PG) is used to control the display panel to display at a target grayscale at a refresh rate of 10 Hz, and a colorimeter is used to collect display brightness data of the display panel during a preset time period, such as chromaticity
  • the data acquisition frequency of the meter is 3000Hz, the number of data acquisitions is 8192, and the preset time period is 2.73s. In the case of removing the data of 0.1s before and after, 25 frames of display brightness data can be collected at a refresh rate of 10Hz.
  • S220 Perform Fourier transform on the multiple pieces of display brightness data to obtain frequency domain signals of the multiple pieces of display brightness data.
  • Obtaining a plurality of display brightness data within a preset time period is to obtain a time-domain signal of a plurality of display brightness data within a preset time period.
  • the time-domain signal is continuous data
  • the multiple display brightness data are Fourier Leaf transformation can represent multiple display luminance data in the time domain as multiple display luminance data in the frequency domain to obtain a frequency domain signal of the multiple display luminance data, and the frequency domain signal is discrete data.
  • S230 Perform Fourier inverse transform on the product of the frequency domain signals of the plurality of display brightness data and the preset weight coefficient to obtain the time domain signals of the plurality of display brightness data within the preset time period.
  • the preset weight coefficient is a coefficient for displaying brightness data, and the preset weight coefficient can be set according to requirements, so as to obtain display brightness data within a required range.
  • the preset weight coefficient may be a sensitivity coefficient of the human eye to flicker, and the sensitivity coefficient can reflect the sensitivity of the human eye to the flicker of the display screen.
  • the sensitivity coefficient may be a coefficient ranging from 0 to 2, and the sensitivity coefficients corresponding to different refresh frequency ranges are different.
  • Table 1 is a data table of refresh frequency and sensitivity coefficient.
  • Table 1 schematically shows sensitivity coefficients corresponding to refresh frequencies of 20 Hz, 30 Hz, 40 Hz, 50 Hz, 60 Hz and higher than 60 Hz.
  • the sensitivity coefficient shown in Table 1 can be used. It can be seen from Table 1 that the sensitivity of the human eye to the flickering of the display screen corresponding to different refresh frequency ranges is different.
  • the sensitivity coefficient can take a value in the range of 0-1, and the higher the refresh frequency, the smaller the sensitivity coefficient.
  • Refresh frequency(Hz) Sensitivity coefficient 20 1.00 30 0.708 40 0.501 50 0.251 ⁇ 60 0.010
  • Table 2 is another data table of refresh frequency and sensitivity coefficient, and Table 2 schematically shows the sensitivity coefficients corresponding to multiple refresh frequencies in the refresh frequency of 1 Hz-75 Hz.
  • FIG. 4 is a schematic diagram of a relationship curve between a refresh frequency and a sensitivity coefficient provided in an embodiment of the present application, which may be a relationship curve between a refresh frequency and a sensitivity coefficient in Table 2.
  • the sensitivity coefficient can take a value within the range of 0-2.
  • the sensitivity coefficient can be determined according to the refresh frequency corresponding to the display brightness data, for example, the sensitivity coefficient corresponding to different refresh frequencies can be determined according to Table 1, or the sensitivity coefficient corresponding to different refresh frequencies can be determined according to Table 2 and Figure 4 .
  • the frequency domain signal of the display brightness data By multiplying the frequency domain signal of the display brightness data by the sensitivity coefficient, the time domain signal of the display brightness data considering the sensitivity coefficient of the human eye to flicker can be obtained, which helps to make the processed display brightness data closer to the human eye's sensitivity to flicker. Display the actual effect of observation on the screen, thereby improving the accuracy of subsequent data processing.
  • the display brightness data in the frequency domain can be converted back to the display brightness data in the time domain, and the time domain of the processed display brightness data can be obtained signal, the time domain signal is continuous data.
  • FIG. 5 is a schematic diagram of a comparison of display brightness data curves before and after processing provided by an embodiment of the present application, wherein the abscissa represents time in seconds, and the ordinate represents display brightness data.
  • Fig. 5 schematically shows the original display luminance data curve L1 before processing, the enlarged view of the area A in the curve L1, and performing Fourier transform on the original display luminance data, multiplying the display luminance data after Fourier transform
  • the display luminance data curve L2 obtained after taking the sensitivity coefficient and inverse Fourier transform, wherein the black curve is L1, and the white curve is L2.
  • the waveform of the curve L1 before processing is relatively messy, and the waveform of the processed curve L2 is relatively stable. By performing a series of processing on the original display brightness data, the messy original display brightness data can be converted into a stable display Brightness data to reduce the difficulty of subsequent data processing.
  • S240 Determine a maximum value, a minimum value, and a comparison reference value of the display brightness data in each first time period among the time domain signals of the plurality of display brightness data.
  • the duration of the first time period is determined according to the duration of vision of human eyes, and the duration of the preset time period is longer than the duration of the first time period.
  • the duration of the first time period is a frame duration corresponding to a refresh rate of 24 Hz.
  • a frame duration corresponding to a 24Hz refresh rate is about 41.6 milliseconds, so the duration of the first time period may be set to 41.6 milliseconds.
  • FIG. 6 is a schematic diagram of curves of display luminance data with different refresh frequencies provided by an embodiment of the present application.
  • the abscissa represents the time t
  • the unit is ms
  • the ordinate represents the display brightness data Lv
  • the unit is cd/m 2
  • the curve L10 is the display brightness data curve of the 60Hz refresh rate
  • the curve L20 is the 24Hz refresh rate
  • the curve L30 is the display luminance data curve of 10Hz refresh rate.
  • the switching time of the display screen is 16.7 ms, and the display brightness change during the switching of the display screen cannot be recognized by the human eye, and the flickering phenomenon cannot be detected by the human eye.
  • the switching time of the display screen is 100 ms, and the display brightness change during the switching of the display screen can be recognized by the human eyes, and the human eyes can perceive the flickering phenomenon.
  • the duration of the first time period is one frame duration corresponding to the 24Hz refresh rate, it is helpful to determine the flicker degree parameters of the display panel in the corresponding time according to the recognition limit of the human eye for the flicker phenomenon, so that the evaluation of the flicker degree is more accurate. Close to the actual observation effect of human eyes.
  • Fig. 6 only takes the curve L10, the curve L20 and the curve L30 as an example, and shows the switching time of the display screen under different refresh rates, so as to illustrate the influence of the switching time of the display screen on the flickering degree.
  • the curve shape of the display brightness data under different refresh rates is not limited.
  • Fig. 7 is a schematic diagram of a curve of processed display luminance data provided by an embodiment of the present application, which may be performed on the display luminance data by Fourier transform, and then the product of the Fourier-transformed display luminance data and the sensitivity coefficient
  • the curve of display brightness data obtained after inverse Fourier transform.
  • the abscissa represents time t, and the unit is ms, and the ordinate represents display luminance data Lv, and the unit is cd/m 2 .
  • the comparison reference value of the display brightness data change should also be considered. For example, for a display brightness change of 1nit, when 500nit is used as a comparison reference value, the human eye cannot recognize the display brightness change. The human eye can recognize this change in display brightness when compared to a reference value.
  • the limited time for displaying brightness data changes can be set to a frame duration corresponding to a 24Hz refresh rate, for example, the duration of the first time period t1 is set to 41.6ms, and the duration of the preset time period T is set to 2.73s, respectively Determine the maximum value, minimum value and contrast reference value of the display brightness data in all first time periods t1 starting from any time in the preset time period T, so as to calculate the display brightness data in each first time period t1 respectively rate of change.
  • the comparison reference value setting for the display brightness data change may be the maximum value or average value of the display brightness data within the first time period t1.
  • S250 Determine the rate of change of the display luminance data in each first time period according to the ratio of the difference between the maximum value and the minimum value of the display luminance data in each first time period to the comparison reference value.
  • the change rate of display brightness data in each first time period t1 is calculated as:
  • ⁇ L/L is the change rate of the display brightness data in each first time period t1
  • Max is the maximum value of the display brightness data in each first time period t1
  • Min is the display brightness data in each first time period t1
  • the minimum value of the brightness data, M is a comparison reference value, and the comparison reference value can be the maximum value Max of the display brightness data in each first time period t1, or the maximum value of the display brightness data in each first time period t1 average value.
  • the flickering degree parameter of the display panel is a maximum value or an average value among the change rates of the display brightness data within a plurality of first time periods t1. That is, the flicker degree parameter may be the maximum value of the change rate ⁇ L/L of the display brightness data in all the first time period t1, or the average of the change rate ⁇ L/L of the display brightness data in all the first time period t1 value.
  • the flicker degree parameter may also be an average value of the rate of change ⁇ L/L of the display luminance data in the reference time period among the rate of change of the display luminance data in the plurality of first time periods t1.
  • the first 2s of the preset time period T can be The average value of the rate of change ⁇ L/L of the display brightness data in all the first time period t1 is used as the flicker degree parameter.
  • the reference time period can be set as a time period that can best reflect the flickering degree of the display panel according to requirements, so as to improve the accuracy of the flickering degree parameter.
  • the method for debugging the flickering of the display panel further includes: removing data in the second time period from the time domain signals of the plurality of display brightness data; wherein, the second The time period is at least one of the beginning stage and the end stage within the preset time period, the duration of the second time period is less than half of the duration of the preset time period, and the duration of the preset time period is twice the second The difference between the durations of the two time periods is greater than the duration of the first time period.
  • the duration of the second time period may be 0.1s.
  • step S230 since there are fluctuations in the display brightness data after Fourier transform and inverse transform, before step S240 is executed, the signal of the first 0.1s in the time domain signal of the display brightness data of 2.73s can be removed, And the signal of the last 0.1s, and then execute step S240 to step S270, which helps to eliminate abnormal fluctuation data, thereby improving the accuracy of the flicker degree parameter.
  • FIG. 8 is a schematic flow chart of another method for debugging flickering of a display panel provided by an embodiment of the present application. On the basis of the above-mentioned multiple embodiments, this embodiment describes the method for debugging the flickering of the display panel. As shown in Fig. 8, the method includes the following steps.
  • the display panel is controlled to display in different gray scales at a preset refresh frequency, so as to acquire multiple display brightness data within a preset time period corresponding to multiple gray scales at a preset refresh frequency.
  • the display panel may be controlled to display grayscales of 0-255 at the refresh frequency of 10 Hz, and multiple display brightness data corresponding to multiple grayscales within a preset time period may be acquired.
  • S320 Process a plurality of display brightness data to obtain a time domain signal of a plurality of display brightness data continuous in time domain.
  • the duration of the first time period is determined according to the duration of vision of human eyes, and the duration of the preset time period is longer than the duration of the first time period.
  • Each gray scale corresponds to the time-domain signal of display luminance data. Determine the rate of change of the display luminance data in the time-domain signal corresponding to each gray scale in multiple first time periods, so as to calculate each The flickering degree parameter corresponding to the gray scale.
  • the standard value of the flickering degree parameter can be set according to requirements.
  • the standard value of the flickering degree parameter corresponds to the flickering degree parameter value corresponding to the flickering degree that cannot be recognized by human eyes.
  • Each gray scale may have a corresponding standard value of the flicker degree parameter, and the standard values of the flicker degree parameters corresponding to multiple gray scales may be the same or different.
  • step S360 If the flicker degree parameter is greater than the corresponding standard value, execute step S360; if the flicker degree parameter is less than or equal to the corresponding standard value, execute step S370.
  • the flicker specification is a standard for the degree of flicker that cannot be recognized by the human eye.
  • the flickering degree parameters corresponding to multiple gray scales when the display panel displays with different gray scales at a preset refresh frequency can be actually measured, for example, the measurement of the display panel at Under the refresh rate of 10Hz, the parameters corresponding to the flickering degree when displaying each gray scale of 1 to 255, the flickering degree parameter can be expressed in the form of a percentage.
  • the flicker degree parameter of the display panel becomes smaller and smaller, and the flicker degree of the display panel becomes lighter and lighter.
  • the standard value of flicker degree parameters corresponding to all gray scales is 5%, you can compare the flicker degree parameters corresponding to 1 to 255 gray scales with 5% one by one, if the flicker degree parameters corresponding to a gray scale are greater than 5% , it can be determined that the flicker degree of the gray scale can be recognized by human eyes, and the flicker degree of the gray scale does not meet the flicker specification. If the flicker degree parameter corresponding to a gray scale is less than or equal to 5%, it can be determined that the flicker degree of the gray scale cannot be recognized by human eyes, and the flicker degree of the gray scale meets the flicker specification.
  • Whether the flickering degrees of multiple gray levels at the preset refresh rate meet the flicker specification can be determined respectively, and a condition that the flickering degree of each gray level at the preset refresh rate meets the flickering specification can be set. For example, if the flickering degrees of all the grayscales at the preset refresh frequency meet the flickering specifications, then it is determined that the flickering degrees of the refresh rate meet the flickering specifications, or the flickering degrees of at least part of the grayscales at the preset refresh rate meet the flickering specifications, Then it is determined that the flicker degree of the preset refresh rate satisfies the flicker specification.
  • step S380 may include: judging whether the flicker degree of each grayscale at the preset refresh frequency meets the flicker specification; when the flicker degree of any grayscale at the preset refresh frequency does not meet the flicker specification, determine If the flickering degree of the refresh rate does not meet the flickering specification, debug the display panel; when the flickering degree of each gray scale of the preset refresh rate meets the flickering standard, it is determined that the flickering degree of the preset refresh rate meets the flickering standard, and there is no need to modify the display panel for debugging.
  • Fig. 9 is a schematic diagram of a comparison curve of grayscale and flicker degree parameters provided by the embodiment of the present application. It may be combined with the methods in multiple embodiments of the present application to test 5 different display panels, and each display obtained When the panel is displayed in different gray scales at a refresh rate of 10Hz, the flickering degree parameters corresponding to multiple gray scales.
  • Curves F1 to F5 are the relationship curves of the gray scale and flicker degree parameters corresponding to five different display panels
  • the curve F0 is the relationship curve between the gray scale and the standard value of the flicker degree parameters at a refresh frequency of 10Hz.
  • the curve F0 schematically shows Standard values of flicker degree parameters corresponding to multiple gray scales are shown.
  • the flicker degree parameters of each grayscale at a refresh frequency of 10Hz are less than or equal to the standard value of the flicker degree parameters of the corresponding grayscale in the curve F0, it can be determined that the display panel is refreshed at 10Hz. Flicker at a frequency that cannot be detected by the human eye meets the flicker specification without debugging.
  • the flicker degree parameters of multiple gray scales in the curves F1 to F5 are all greater than the standard value of the corresponding gray scale flicker degree parameters in the curve F0, so the flicker of the five display panels at a refresh rate of 10 Hz can be recognized by human eyes, Therefore, the flickering specification is not met, so the five display panels need to be debugged to improve the flickering degree of the 10Hz refresh rate.
  • There are many ways to improve the degree of flickering and reference can be made to any of the ways (1) to (3) to improve the flickering in the above-mentioned embodiments, which will not be repeated here.
  • the parameters of the degree of flicker of multiple gray scales and their standard values are compared to determine the parameters of multiple gray scales. According to whether the flickering degree of multiple gray scales meets the flickering specification, it is determined whether the flickering degree of the display panel at the preset refresh frequency meets the flickering specification, and debugging of the display panel is helpful. It is used to improve the flicker phenomenon of the display panel under the preset refresh rate.
  • FIG. 10 is a schematic structural diagram of a display panel flicker debugging device provided by an embodiment of the present application. This embodiment is applicable to determining the flicker degree parameter of the display panel to improve the flicker phenomenon.
  • the flicker debugging device of the display panel provided in the embodiment of the present application can execute the flicker debugging method of the display panel provided in any embodiment of the present application, and has corresponding functional modules for executing the method.
  • the flicker debugging device of the display panel includes: a display brightness data acquisition module 10 , a display brightness data processing module 20 , a flicker degree parameter determination module 30 and a debugging module 40 .
  • the display brightness data acquisition module 10 is configured to acquire a plurality of display brightness data of the display panel within a preset time period; the display brightness data processing module 20 is configured to process a plurality of display brightness data to obtain a plurality of continuous display brightness data in the time domain The time domain signal of brightness data; the flicker degree parameter determination module 30 is set to determine the flicker degree parameter of the display panel according to the rate of change of the display brightness data in a plurality of first time periods in the time domain signals of the plurality of display brightness data; wherein, The duration of the first time period is determined according to the persistence of vision of human eyes, and the duration of the preset time period is longer than the duration of the first time period; the debugging module 40 is configured to determine whether to debug the display panel according to the flicker degree parameter.
  • the flicker debugging device of the display panel provided in the embodiment of the present application can execute the flicker debugging method of the display panel provided in any embodiment of the present application, and has corresponding functional modules for executing the method, so details will not be repeated here.
  • FIG. 11 is a schematic structural diagram of another device for debugging a display panel flicker provided by an embodiment of the present application.
  • the display brightness data acquisition module 10 includes a display control unit 11 and a display brightness data acquisition unit 12; the display control unit 11 is electrically connected to the display panel, and is configured to control The display panel is displayed; the display brightness data acquisition unit 12 is electrically connected to the display brightness data processing module 20, and is configured to obtain a plurality of display brightness data of the display panel within a preset time period, and transmit the plurality of display brightness data to the display brightness Data processing module 20.
  • FIG. 12 is a schematic structural diagram of another display panel flicker debugging device provided by an embodiment of the present application. 11 and 12, optionally, on the basis of the above-mentioned multiple embodiments, the display control unit 11 includes a signal generator (Pattern Generator, PG) 111, the display brightness data acquisition unit 12 includes a colorimeter 121, and the display Both the brightness data processing module 20 and the flicker degree parameter determination module 30 are configured in the computer 50 .
  • PG Signal Generator
  • the flicker debugging device of the display panel can also include a product carrier 60.
  • the display panel 70 can be placed flat on the product carrier 60, and the display panel 70 can be controlled by the signal generator 111 at a preset To display at the target grayscale at the refresh rate, place the colorimeter 121 in the middle position directly above the display side of the display panel 70, so as to obtain multiple display brightnesses of the display panel 70 within a preset time period through the colorimeter 121 data, and transmit the plurality of display brightness data to the display brightness data processing module 20 and the flicker degree parameter determination module 30 in the computer 50, and carry out Fourier transform to a plurality of display brightness data through the display brightness data processing module 20 to obtain A plurality of frequency domain signals displaying brightness data, and performing Fourier inverse transform on the product of multiple frequency domain signals displaying brightness data and preset weight coefficients to obtain time domain of multiple display brightness data within a preset time period signal, to determine the maximum value, the minimum value and the comparison reference value

Abstract

一种显示面板的闪烁调试方法和装置，其中显示面板的闪烁调试方法包括：获取显示面板在预设时间段内的多个显示亮度数据（S110）；对多个显示亮度数据进行处理，得到时域上连续的多个显示亮度数据的时域信号（S120）；根据多个显示亮度数据的时域信号中多个第一时间段内显示亮度数据的变化率，确定显示面板的闪烁程度参数（S130）；其中，每个第一时间段的时长根据人眼的视觉暂留时间确定，且预设时间段的时长大于每个第一时间段的时长；根据闪烁程度参数确定是否对显示面板进行调试（S140）。

Description

显示面板的闪烁调试方法和装置
本申请要求在2021年09月03日提交中国专利局、申请号为202111033241.2的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及显示技术领域，例如涉及一种显示面板的闪烁调试方法和装置。
背景技术
随着显示技术的不断发展，人们对于显示面板的性能要求越来越高。显示面板以不同的刷新频率进行显示时，显示画面存在不同程度的闪烁现象(Flicker)。相关技术对于显示面板闪烁程度的测试的准确度较低，不利于闪烁现象的改善。
发明内容
本申请实施例提供一种显示面板的闪烁调试方法和装置，以提升闪烁程度参数的准确度，并提升显示面板闪烁现象的改善效果。
本申请实施例提供了一种显示面板的闪烁调试方法，包括：获取显示面板在预设时间段内的多个显示亮度数据；对所述多个显示亮度数据进行处理，得到时域上连续的所述多个显示亮度数据的时域信号；根据所述多个显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的变化率，确定所述显示面板的闪烁程度参数；其中，每个第一时间段的时长根据人眼的视觉暂留时间确定，且所述预设时间段的时长大于每个所述第一时间段的时长；根据所述闪烁程度参数确定是否对所述显示面板进行调试。
本申请实施例还提供了一种显示面板的闪烁调试装置，包括：亮度数据获取模块，设置为获取显示面板在预设时间段内的多个显示亮度数据；显示亮度数据处理模块，设置为对所述多个显示亮度数据进行处理，得到时域上连续的所述多个显示亮度数据的时域信号；闪烁程度参数确定模块，设置为根据所述多个显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的变化率，确定所述显示面板的闪烁程度参数；其中，每个第一时间段的时长根据人眼的视觉暂留时间确定，且所述预设时间段的时长大于每个所述第一时间段的时长；调试模块，设置为根据所述闪烁程度参数确定是否对所述显示面板进行调试。
显示面板的闪烁现象与显示画面切换时的亮度差异、人眼可识别的显示画 面切换时间界限和显示亮度变化的相对程度均相关。本申请实施例提供的显示面板的闪烁调试方法和装置，通过对显示亮度数据进行处理，得到时域上连续的多个显示亮度数据的时域信号，有助于降低数据处理难度。根据多个显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的变化率确定显示面板的闪烁程度参数，实现了根据视觉暂留时间内的显示亮度变化来确定闪烁程度参数，以提升闪烁程度参数的准确度。本申请实施例综合上述闪烁现象的产生原因来确定闪烁程度参数，能够使闪烁程度参数更加贴近人眼的观察效果，从而提升闪烁程度参数的准确度，根据闪烁程度参数对显示面板进行调试，还有助于提升闪烁现象的改善效果。
附图说明
图1是一种闪烁程度测试结果示意图；
图2是本申请实施例提供的一种显示面板的闪烁调试方法的流程示意图；
图3是本申请实施例提供的另一种显示面板的闪烁调试方法的流程示意图；
图4是本申请实施例提供的刷新频率与敏感度系数的关系曲线示意图；
图5是本申请实施例提供的一种处理前后的显示亮度数据曲线的对比示意图；
图6是本申请实施例提供的不同刷新频率的显示亮度数据的曲线示意图；
图7是本申请实施例提供的一种处理后的显示亮度数据的曲线示意图；
图8是本申请实施例提供的另一种显示面板的闪烁调试方法的流程示意图；
图9是本申请实施例提供的一种灰阶和闪烁程度参数的关系曲线对比示意图；
图10是本申请实施例提供的一种显示面板的闪烁调试装置的结构示意图；
图11是本申请实施例提供的另一种显示面板的闪烁调试装置的结构示意图；
图12是本申请实施例提供的另一种显示面板的闪烁调试装置的结构示意图。
具体实施方式
下面结合附图和实施例对本申请进行说明。可以理解的是，此处所描述的实施例仅仅用于解释本申请，而非对本申请的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与本申请相关部分的结构。
通常，对于显示面板闪烁程度的测试的准确度较低，不利于闪烁现象的改善。出现上述问题的原因如下。显示面板可实现不同刷新频率的自由切换，示 例性地，基于低温多晶氧化物(Low Temperature Polycrystalline Oxide,LTPO)技术的显示面板，将低温多晶硅(Low Temperature Poly-Silicon，LTPS)晶体管和铟镓锌氧化物(Indium Gallium Zinc Oxide，IGZO)晶体管应用于像素电路中，以驱动显示面板以不同刷新频率进行显示。例如，在视频模式和游戏模式下，显示面板可切换至120Hz的刷新频率，在待机状态、息屏状态和阅读状态下，显示面板可切换至10Hz甚至1Hz的刷新频率。在显示面板的刷新频率较低时，由于显示画面的切换时间延长，超过了人眼的响应时间，每次显示画面写入时的亮度变化可被人眼识别，使用户能够观察到显示画面的闪烁。
为了改善显示面板的闪烁现象，需要对显示面板的闪烁程度进行量化测试。对于闪烁程度的测试一般有如下两种方案：
方案一、通过人眼目视来确定显示面板的闪烁程度。该方案的效率较低，并且难以对显示面板的闪烁程度进行精确量化。
方案二、获取显示亮度数据的频域信号，根据显示亮度数据的频域信号的幅值计算显示面板的闪烁程度。通过该方案在低刷新频率下得到的闪烁程度与人眼目视的闪烁程度不匹配，存在闪烁程度的测试准确度较低的问题。
示例性地，图1是一种闪烁程度测试结果示意图，可以是采用方案二对10Hz刷新频率下的显示面板进行测试得到的闪烁程度测试结果。横坐标代表灰阶，例如W255为255灰阶，W127为127灰阶，W87为87灰阶，W64为64灰阶，W55为55灰阶，W48为48灰阶，W32为32灰阶，W15为15灰阶，纵坐标代表闪烁程度。闪烁程度的数值越小，表示闪烁程度越轻微；闪烁程度的数值越大，表示闪烁程度越严重。如图1所示，测试结果表明48灰阶下的闪烁程度相比于64灰阶和55灰阶的闪烁程度均轻微。然而，根据理论及人眼目视结果可知，48灰阶下的闪烁程度应比64灰阶和55灰阶的闪烁程度均严重，该测试结果与理论及人眼目视结果均不匹配，因而存在测试准确度较低的问题，并不利于闪烁现象的改善。
针对上述对显示面板的闪烁程度进行量化测试不准确的问题，本申请实施例提供了一种显示面板的闪烁调试方法，用于确定显示面板的闪烁程度参数，以对闪烁现象进行改善。该方法可以由显示面板的闪烁调试装置执行。图2是本申请实施例提供的一种显示面板的闪烁调试方法的流程示意图。如图2所示，该方法包括如下步骤。
S110、获取显示面板在预设时间段内的多个显示亮度数据。
显示面板可以是发光二极管(Light Emitting Diode，LED)显示面板、有机发光二极管(Organic Light-Emitting Diode，OLED)显示面板或微发光二极管(Micro  Light Emitting Diode，Micro LED)显示面板等。控制显示面板进行显示，以获取该显示面板在预设时间段内的显示亮度数据。示例性地，可以控制显示面板在预设刷新频率下以目标灰阶进行显示，并获取预设时间段内的显示亮度数据。
S120、对多个显示亮度数据进行处理，得到时域上连续的多个显示亮度数据的时域信号。
示例性地，获取预设时间段内的多个显示亮度数据为获取预设时间段内的显示亮度数据的时域信号，即获取预设时间段内不同时间的多个显示亮度数据的时域信号。对多个显示亮度数据进行处理，可以是先将时域内的多个显示亮度数据转换为频域内的显示亮度数据，即不同频率的显示亮度数据的频域信号，再将频域内的显示亮度数据转换为时域内的显示亮度数据，以得到转换后的预设时间段内不同时间的多个显示亮度数据的时域信号，从而实现将杂乱的原始显示亮度数据转换为稳定且时域上连续的显示亮度数据，以降低后续数据处理的难度。
S130、根据多个显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的变化率，确定显示面板的闪烁程度参数。
显示亮度数据的变化率表示显示亮度数据变化的快慢程度，为确定显示亮度数据的变化率，不仅需要确定显示亮度数据的变化值，还需要确定显示亮度数据发生变化的时长，第一时间段即是用于对显示亮度数据变化的快慢程度进行确定的时长。第一时间段的时长根据人眼的视觉暂留时间确定，且预设时间段的时长大于第一时间段的时长。
视觉暂留是指光对视网膜所产生的视觉在光停止作用后，仍保留一段时间的现象。显示面板的刷新频率决定了显示画面的切换时间，在显示画面的切换时间等于视觉暂留时间时，该切换时间可视为人眼对于闪烁现象不可识别的临界值，在显示画面的切换时间小于或等于视觉暂留时间时，人眼无法识别到显示画面切换时的显示亮度变化，在显示画面的切换时间大于视觉暂留时间时，人眼可识别到显示画面切换时的显示亮度变化。将人眼的视觉暂留时间确定为第一时间段的时长，有助于根据人眼对于闪烁现象的识别界限来确定显示面板的闪烁程度参数，使得闪烁程度的评价更为贴近人眼的实际观察效果。
处理后的多个显示亮度数据的时域信号，包括预设时间段内不同时间的显示亮度数据。多个显示亮度数据的时域信号中每个第一时间段内的显示亮度数据，可以是预设时间段内以任意时刻为起点的第一时间段内的显示亮度数据，预设时间段内的多个显示亮度数据中，可包括多个第一时间段内的显示亮度数据。示例性地，在预设时间段的时长为2秒，第一时间段的时长为41.6毫秒时，多个第一时间段内的显示亮度数据可包括：自第0.1秒起的41.6毫秒内的显示 亮度数据、自第0.11秒起的41.6毫秒内的显示亮度数据、自第0.12秒起的41.6毫秒内的显示亮度数据等，不再一一列举。预设时间段的时长应尽可能地长，以获取尽可能多的第一时间段内的显示亮度数据，从而提升闪烁程度参数的准确度。
多个第一时间段内的显示亮度数据的变化率，能够反映该时间段内显示亮度的变化程度。示例性地，在本申请的一种实施方式中，可以根据预设时间段内多个第一时间段内的显示亮度数据的变化率，确定多个显示亮度数据的变化率中的最大值，并将该最大值确定为显示面板的闪烁程度参数，以代表显示面板在预设刷新频率下以目标灰阶进行显示时的闪烁程度。在本申请的另一种实施方式中，可以根据多个显示亮度数据的变化率计算变化率的平均值，并将该平均值确定为显示面板的闪烁程度参数，以代表显示面板在预设刷新频率下以目标灰阶进行显示时的闪烁程度。在本申请的其他实施方式中，还可以根据多个第一时间段内的显示亮度数据的变化率，采用其他方式计算闪烁程度参数，例如为多个第一时间段内的显示亮度数据的变化率设置权重，通过加权取平均值的方式来计算闪烁程度参数，本申请实施例对此不进行限定。
S140、根据闪烁程度参数确定是否对显示面板进行调试。
示例性地，闪烁程度参数越大，表示显示画面在第一时间段内的显示亮度变化程度越大，闪烁现象越严重，闪烁程度参数越小，表示显示画面在第一时间段内的显示亮度变化程度越小，闪烁现象越轻微。可以设置显示面板在预设刷新频率下以目标灰阶进行显示时的闪烁程度临界阈值，在目标灰阶的闪烁程度参数大于临界阈值时，确定当前的闪烁程度不可接受，需要对显示面板进行调试，以改善显示面板的闪烁程度。在目标灰阶的闪烁程度参数小于或等于临界阈值时，确定当前的闪烁程度可以接受，无需对显示面板进行调试。
对显示面板进行调试，以改善其闪烁程度的方式可以有多种，下面以其中的几种为例进行示意性说明：
闪烁改善方式(一)：当显示面板的闪烁程度不可接受时，对像素电路的驱动时序进行调整。例如，延长一帧显示画面的数据写入时间，使数据电压充分写入存储电容，以使存储电容在发光阶段能够更好地维持驱动晶体管的栅极的电压，以改善相邻帧的显示画面的切换时间过长而引起的显示画面闪烁。或者，像素电路的驱动时序中加入补偿阶段或预充电阶段，以在数据写入阶段之前对存储电容进行预充电，同样有助于提升存储电容对驱动晶体管的栅极的电压的维持作用，从而改善闪烁现象。
闪烁改善方式(二)：当显示面板的闪烁程度不可接受时，调整初始化信号的电压值。该初始化信号是指对驱动晶体管的栅极进行初始化的信号，通过 调整初始化信号的电压值，能够调整驱动晶体管的栅极和初始化信号输入端的压差，从而减小发光阶段驱动晶体管的栅极和初始化信号输入端之间的漏电流，以在相邻帧的显示画面的切换时间过长时，避免驱动晶体管的栅极的电荷通过漏电路径泄放而引起的闪烁现象。
闪烁改善方式(三)：当显示面板的闪烁程度不可接受时，调整电源电压。该电源电压可以是在发光阶段与发光器件的阳极电连接的电源电压(例如ELVDD)，电源电压的大小与显示亮度的大小相关，通过调整电源电压，能够调整显示面板的整体显示亮度，在整体显示亮度发生变化时，显示亮度的变化率也会发生变化。因此，可以通过调整电源电压的大小来降低显示亮度的变化率，从而在相邻帧的显示画面的切换时间过长时，减弱显示亮度的变化，从而改善闪烁现象。
显示面板的闪烁现象与显示画面切换时的亮度差异、人眼可识别的显示画面切换时间界限和显示亮度变化的相对程度均相关。本申请实施例的技术方案，通过对多个显示亮度数据进行处理，得到时域上连续的多个显示亮度数据的时域信号，有助于降低数据处理难度。根据多个显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的变化率确定显示面板的闪烁程度参数，实现了根据视觉暂留时间内的显示亮度变化来确定闪烁程度参数，以提升闪烁程度参数的准确度。本方案综合上述闪烁现象的产生原因来确定闪烁程度参数，能够使闪烁程度参数更加贴近人眼的观察效果，从而提升闪烁程度参数的准确度，根据本申请实施例中的闪烁程度参数对显示面板进行调试，还有助于提升闪烁现象的改善效果。
图3是本申请实施例提供的另一种显示面板的闪烁调试方法的流程示意图。在上述实施例的基础上，本实施例对显示面板的闪烁调试方法进行了说明。如图3所示，该方法包括如下步骤。
S210、获取显示面板在预设时间段内的多个显示亮度数据。
示例性地，通过信号发生器(Pattern Generator，PG)控制显示面板在10Hz刷新频率下以目标灰阶进行显示，并通过色度计采集显示面板在预设时间段的显示亮度数据，例如色度计的数据采集频率为3000Hz，数据采集数量为8192，预设时间段的时长为2.73s，在去除前后各0.1s的数据的情况下，10Hz刷新频率下可采集到25帧的显示亮度数据。
S220、对多个显示亮度数据进行傅里叶变换，得到多个显示亮度数据的频域信号。
获取预设时间段内的多个显示亮度数据为获取在预设时间段内的多个显示 亮度数据的时域信号，该时域信号为连续性数据，通过对多个显示亮度数据进行傅里叶变换，能够将时域的多个显示亮度数据表示为频域的多个显示亮度数据，得到多个显示亮度数据的频域信号，该频域信号为离散性数据。
S230、对多个显示亮度数据的频域信号与预设权重系数的乘积进行傅里叶逆变换，得到多个显示亮度数据在预设时间段内的时域信号。
预设权重系数为显示亮度数据的系数，预设权重系数可根据需求进行设置，以得到需求范围内的显示亮度数据。可选地，预设权重系数可以是人眼对于闪烁的敏感度系数，该敏感度系数能够反映人眼对于显示画面闪烁的敏感程度。例如，该敏感度系数可以是范围在0～2之内的系数，不同刷新频率范围对应的敏感度系数不同。
表1为一种刷新频率和敏感度系数的数据表，表1中示意性地示出了20Hz、30Hz、40Hz、50Hz、60Hz以及大于60Hz的刷新频率对应的敏感度系数。示例性地，在本申请的一种实施方式中，可以采用表1所示的敏感度系数，由表1可知，人眼对于不同刷新频率范围对应的显示画面闪烁的敏感程度不同，对于本实施例中20Hz～60Hz及以上的刷新频率，敏感度系数可以在0～1的范围内取值，且刷新频率越高，敏感度系数越小。
表1
刷新频率(Hz) 敏感度系数
20 1.00
30 0.708
40 0.501
50 0.251
≥60 0.010
表2为另一种刷新频率和敏感度系数的数据表，表2中示意性地示出了1Hz～75Hz刷新频率中的多个刷新频率对应的敏感度系数。图4是本申请实施例提供的刷新频率与敏感度系数的关系曲线示意图，可以是表2中的刷新频率和敏感度系数的关系曲线图。示例性地，在本申请的另一种实施方式中，可以采用表2和图4所示的敏感度系数，由表2和图4可知，人眼对于1Hz～75Hz刷新频率中的不同刷新频率范围对应的显示画面闪烁的敏感程度不同，对于本实施例中1Hz～75Hz的刷新频率，敏感度系数可以在0～2的范围内取值。
在应用时，可以根据显示亮度数据对应的刷新频率确定敏感度系数，例如根据表1确定不同刷新频率对应的敏感度系数，或者也可以根据表2和图4确定不同刷新频率对应的敏感度系数。通过将显示亮度数据的频域信号乘以敏感度系数，能够得到考虑人眼对于闪烁的敏感度系数的显示亮度数据的时域信号，有助于使处理后的显示亮度数据更加贴近人眼对于显示画面进行观察的实际效果，从而提升后续数据处理的准确度。
表2
Figure PCTCN2022088193-appb-000001
Figure PCTCN2022088193-appb-000002
通过对显示亮度数据的频域信号与预设权重系数的乘积进行傅里叶逆变换，能够将频域的显示亮度数据转换回时域的显示亮度数据，得到处理后的显示亮度数据的时域信号，该时域信号为连续性数据。
图5是本申请实施例提供的一种处理前后的显示亮度数据曲线的对比示意图，其中，横坐标表示时间，单位为秒，纵坐标表示显示亮度数据。图5示意性地示出了处理前的原始显示亮度数据曲线L1，曲线L1中A区域的放大图，以及对原始显示亮度数据进行傅里叶变换，将傅里叶变换后的显示亮度数据乘以敏感度系数，并进行傅里叶逆变换之后得到的显示亮度数据曲线L2，其中的黑色曲线为L1，白色曲线为L2。如图5所示，处理前的曲线L1的波形较为杂乱，处理后的曲线L2的波形较为稳定，通过对原始显示亮度数据进行一系列处理，能够将杂乱的原始显示亮度数据转换为稳定的显示亮度数据，以降低后续数据处理的难度。
S240、确定多个显示亮度数据的时域信号中每个第一时间段内的显示亮度数据的最大值、最小值和对比参考值。
第一时间段的时长根据人眼的视觉暂留时间确定，且预设时间段的时长大于第一时间段的时长。可选地，第一时间段的时长为24Hz刷新频率所对应的一帧时长。24Hz刷新频率对应的一帧时长约为41.6毫秒，因此可将第一时间段的时长设置为41.6毫秒。图6是本申请实施例提供的不同刷新频率的显示亮度数据的曲线示意图。如图6所示，横坐标表示时间t，单位为毫秒ms，纵坐标表示显示亮度数据Lv，单位为cd/m 2，曲线L10为60Hz刷新频率的显示亮度数据曲线，曲线L20为24Hz刷新频率的显示亮度数据曲线，曲线L30为10Hz刷新频率的显示亮度数据曲线。在显示面板以24Hz刷新频率进行显示时，显示画面的切换时间为41.6ms，对应为人眼对于闪烁现象不可识别的临界值。在显示面板以60Hz刷新频率进行显示时，显示画面的切换时间为16.7ms，显示画面切换时的显示亮度变化无法被人眼识别，人眼无法察觉到闪烁现象。在显示面板以10Hz刷新频率进行显示时，显示画面的切换时间为100ms，显示画面切换时的显示亮度变化可被人眼识别，人眼能够察觉到闪烁现象。通过将第一时间段的时长为24Hz刷新频率对应的一帧时长，有助于根据人眼对于闪烁现象的识别界限来确定显示面板在相应时间内的闪烁程度参数，使得闪烁程度的评价更为贴近人眼的实际观察效果。
需要说明的是，图6仅以曲线L10、曲线L20和曲线L30为例，对不同刷新频率下的显示画面切换时间进行示意，以说明显示画面的切换时间对闪烁程度的影响，本实施例对于不同刷新频率下的显示亮度数据的曲线形状不进行限定。
图7是本申请实施例提供的一种处理后的显示亮度数据的曲线示意图，可以是对显示亮度数据进行傅里叶变换，再将傅里叶变换后的显示亮度数据与敏感度系数的乘积进行傅里叶逆变换之后得到的显示亮度数据的曲线。横坐标表示时间t，单位为毫秒ms，纵坐标表示显示亮度数据Lv，单位为cd/m 2。示例性地，参见图7，为确定一段曲线的显示亮度数据的变化率，既需要考虑显示亮度数据变化的界定时间，即该段曲线对应的时长，也需要考虑该段曲线中的显示亮度数据的最大值和最小值，同时还要考虑显示亮度数据变化的对比参考值，例如对于1nit的显示亮度变化，在以500nit作为对比参考值时，人眼无法识别该显示亮度变化，在以5nit作为对比参考值时，人眼能够识别该显示亮度变化。因此，可以将显示亮度数据变化的界定时间设置为24Hz刷新频率对应的一帧时长，例如将第一时间段t1的时长设置为41.6ms，将预设时间段T的时长设置为2.73s，分别确定预设时间段T中以任意时刻为起点的所有第一时间段t1内的显示亮度数据的最大值、最小值和对比参考值，以分别计算每个第一时间段t1内的显示亮度数据的变化率。可选地，显示亮度数据变化的对比参考值设置可以是第一时间段t1内的显示亮度数据的最大值或平均值。通过对预设时间段中任意多个41.6ms内的显示亮度数据进行分析，有助于避免仅将预设时间段划分为不同的时间段进行数据分析带来的数据分析结果失真的问题，有助于提升显示亮度数据变化率的准确性。
S250、根据每个第一时间段的显示亮度数据的最大值和最小值之差与对比参考值的比值，确定每个第一时间段内的显示亮度数据的变化率。
示例性地，每个第一时间段t1内的显示亮度数据的变化率计算为：
ΔL/L＝(Max-Min)/M*100％；
ΔL/L为每个第一时间段t1内的显示亮度数据的变化率，Max为每个第一时间段t1内的显示亮度数据的最大值，Min为每个第一时间段t1内的显示亮度数据的最小值，M为对比参考值，该对比参考值可以是每个第一时间段t1内的显示亮度数据的最大值Max，或者是每个第一时间段t1内的显示亮度数据的平均值。
S260、根据多个第一时间段内的显示亮度数据的变化率，确定显示面板的闪烁程度参数。
可选地，显示面板的闪烁程度参数为多个第一时间段t1内的显示亮度数据的变化率中的最大值或平均值。即，闪烁程度参数可以是所有第一时间段t1内的显示亮度数据的变化率ΔL/L中的最大值，或者是所有第一时间段t1内的显示亮度数据的变化率ΔL/L的平均值。可选地，闪烁程度参数还可以是多个第一时间段t1内的显示亮度数据的变化率中，参考时间段内的显示亮度数据的变化率ΔL/L的平均值。例如，在预设时间段T的时长为2.73s，第一时间段t1的时长为41.6ms，参考时间段为预设时间段T的前2s时，可以将预设时间段T的前2s中所有第一时间段t1内的显示亮度数据的变化率ΔL/L的平均值作为闪烁程度参数。参考时间段可根据需求设置为最能体现显示面板的闪烁程度的时间段，以提升闪烁程度参数的准确度。
S270、根据闪烁程度参数确定是否对显示面板进行调试。
对显示面板进行调试，以改善其闪烁程度的方式可以有多种，可以参照上述实施例中的闪烁改善方式(一)至(三)中的任意方式，此处不再赘述。
在上述实施例的基础上，可选地，在步骤S240之前，显示面板的闪烁调试方法还包括：去除多个显示亮度数据的时域信号中的第二时间段内的数据；其中，第二时间段为预设时间段内的开始阶段和结尾阶段的至少之一，第二时间段的时长小于预设时间段的时长的二分之一，且预设时间段的时长与二倍的第二时间段的时长之差大于第一时间段的时长。
示例性地，在预设时间段的时长为2.73s，第一时间段的时长为41.6ms时，第二时间段的时长可以是0.1s。在执行完成步骤S230之后，由于傅里叶变换及逆变换之后的显示亮度数据存在波动，因此可以在执行步骤S240之前，去除2.73s的显示亮度数据的时域信号中的前0.1s的信号，以及后0.1s的信号，然后再执行步骤S240至步骤S270，这样有助于剔除异常波动数据，从而提升闪烁程度参数的准确度。
图8是本申请实施例提供的另一种显示面板的闪烁调试方法的流程示意图。在上述多个实施例的基础上，本实施例对显示面板的闪烁调试方法进行了说明。如图8所示，该方法包括如下步骤。
S310、获取显示面板在预设时间段内的多个显示亮度数据。
可选地，控制显示面板在预设刷新频率下以不同灰阶进行显示，以获取预设刷新频率下多个灰阶对应的预设时间段内的多个显示亮度数据。例如在预设刷新频率为10Hz时，可以控制显示面板在10Hz刷新频率下分别以0～255灰阶进行显示，并获取多个灰阶对应的预设时间段内的多个显示亮度数据。
S320、对多个显示亮度数据进行处理，得到时域上连续的多个显示亮度数 据的时域信号。
S330、根据多个显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的变化率，确定显示面板的闪烁程度参数。
第一时间段的时长根据人眼的视觉暂留时间确定，且预设时间段的时长大于第一时间段的时长。
对每个灰阶对应的预设时间段内的显示亮度数据进行傅里叶变换，再将傅里叶变换后的显示亮度数据与敏感度系数的乘积进行傅里叶逆变换，以得到处理后的每个灰阶对应的显示亮度数据的时域信号。确定每个灰阶对应的显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的变化率，以根据多个第一时间段内的显示亮度数据的变化率，计算每个灰阶对应的闪烁程度参数。
S340、确定预设刷新频率下多个灰阶的闪烁程度参数及闪烁程度参数的标准值。
闪烁程度参数的标准值可以根据需求进行设置，例如，闪烁程度参数的标准值为人眼无法识别的闪烁程度对应的闪烁程度参数值，该标准值可以是当人眼目视显示面板时观察不出显示面板在闪烁所对应的闪烁程度参数值。每个灰阶都可以有对应的闪烁程度参数的标准值，多个灰阶对应的闪烁程度参数的标准值可以相同或不同。
S350、判断多个灰阶的闪烁程度参数是否大于对应的标准值。
若闪烁程度参数大于对应的标准值，则执行步骤S360；若闪烁程度参数小于或等于对应的标准值，则执行步骤S370。
S360、确定闪烁程度参数对应的灰阶的闪烁程度不满足闪烁规格。
S370、确定闪烁程度参数对应的灰阶的闪烁程度满足闪烁规格。
闪烁规格为人眼无法识别的闪烁程度的标准。示例性地，可以结合本申请各实施例中的技术方案，对显示面板在预设刷新频率下以不同灰阶进行显示时多个灰阶对应的闪烁程度参数进行实际测定，例如测定显示面板在10Hz刷新频率下，以1～255灰阶中的每个灰阶进行显示时所对应的闪烁程度参数，闪烁程度参数可表示为百分数的形式。闪烁程度参数越大，表示显示面板的闪烁程度越严重，闪烁程度参数越小，表示显示面板的闪烁程度越轻微。根据实际的测定结果可知，由1灰阶至255灰阶，显示面板的闪烁程度参数越来越小，显示面板的闪烁程度越来越轻微。在所有灰阶对应的闪烁程度参数的标准值均为5％时，可一一将1～255灰阶对应的闪烁程度参数与5％进行对比，若一灰阶对应的闪烁程度参数大于5％，则可确定该灰阶的闪烁程度可被人眼识别，该灰阶的闪烁程度不满足闪烁规格。若一灰阶对应的闪烁程度参数小于或等于5％，则可确 定该灰阶的闪烁程度无法被人眼识别，该灰阶的闪烁程度满足闪烁规格。
S380、根据多个灰阶的闪烁程度满足闪烁规格的比例，确定是否对显示面板进行相应的调试。
可以分别确定预设刷新频率下多个灰阶的闪烁程度是否满足闪烁规格，并设置预设刷新频率下的每个灰阶的闪烁程度满足闪烁规格的条件。例如，若预设刷新频率下所有灰阶的闪烁程度均满足闪烁规格，则确定该刷新频率的闪烁程度满足闪烁规格，或者预设刷新频率下的至少部分灰阶的闪烁程度均满足闪烁规格，则确定该预设刷新频率的闪烁程度满足闪烁规格。
可选地，步骤S380可以包括：判断预设刷新频率下的每个灰阶的闪烁程度是否满足闪烁规格；当预设刷新频率的任一灰阶的闪烁程度不满足闪烁规格时，确定预设刷新频率的闪烁程度不满足闪烁规格，对显示面板进行调试；当预设刷新频率的每个灰阶的闪烁程度均满足闪烁规格时，确定预设刷新频率的闪烁程度满足闪烁规格，无需对显示面板进行调试。
图9是本申请实施例提供的一种灰阶和闪烁程度参数的关系曲线对比示意图，可以是结合本申请多个实施例中的方法，对5个不同的显示面板进行测试，得到的各显示面板在10Hz刷新频率下以不同灰阶进行显示时多个灰阶对应的闪烁程度参数。曲线F1至F5分别为5个不同的显示面板对应的灰阶和闪烁程度参数的关系曲线，曲线F0为10Hz刷新频率下的灰阶与闪烁程度参数的标准值的关系曲线，曲线F0示意性地示出了多个灰阶对应的闪烁程度参数的标准值。
示例性地，参见图9，若10Hz刷新频率下的每个灰阶的闪烁程度参数均小于或等于曲线F0中对应的灰阶的闪烁程度参数的标准值，则可确定该显示面板在10Hz刷新频率下的闪烁无法被人眼识别，从而满足闪烁规格，无需进行调试。曲线F1至F5中多个灰阶的闪烁程度参数均大于曲线F0中对应的灰阶的闪烁程度参数的标准值，因此该五个显示面板在10Hz刷新频率下的闪烁均能被人眼识别，从而不满足闪烁规格，因此需要对该五个显示面板进行调试，以改善10Hz刷新频率的闪烁程度。改善其闪烁程度的方式可以有多种，可以参照上述实施例中的闪烁改善方式(一)至(三)中的任意方式，此处不再赘述。
本实施例的技术方案，通过确定显示面板在预设刷新频率下以不同灰阶进行显示时的闪烁程度参数，将多个灰阶的闪烁程度参数及其标准值进行比较，以确定多个灰阶的闪烁程度是否满足闪烁规格，从而依据多个灰阶的闪烁程度是否满足闪烁规格来确定显示面板在预设刷新频率下的闪烁程度是否满足闪烁规格，据此对显示面板进行调试，有助于改善显示面板在预设刷新频率下的闪烁现象。
图10是本申请实施例提供的一种显示面板的闪烁调试装置的结构示意图。本实施例可适用于确定显示面板的闪烁程度参数，以对闪烁现象进行改善的情况。本申请实施例所提供的显示面板的闪烁调试装置，可执行本申请任意实施例所提供的显示面板的闪烁调试方法，具备执行方法相应的功能模块。如图10所示，该显示面板的闪烁调试装置包括：显示亮度数据获取模块10、显示亮度数据处理模块20、闪烁程度参数确定模块30和调试模块40。
显示亮度数据获取模块10设置为获取显示面板在预设时间段内的多个显示亮度数据；显示亮度数据处理模块20设置为对多个显示亮度数据进行处理，得到时域上连续的多个显示亮度数据的时域信号；闪烁程度参数确定模块30设置为根据多个显示亮度数据的时域信号中多个第一时间段内显示亮度数据的变化率，确定显示面板的闪烁程度参数；其中，第一时间段的时长根据人眼的视觉暂留时间确定，且预设时间段的时长大于第一时间段的时长；调试模块40设置为根据闪烁程度参数确定是否对显示面板进行调试。
本申请实施例所提供的显示面板的闪烁调试装置，可执行本申请任意实施例所提供的显示面板的闪烁调试方法，具备执行方法相应的功能模块，不再赘述。
图11是本申请实施例提供的另一种显示面板的闪烁调试装置的结构示意图。如图11所示，可选地，在上述实施例的基础上，显示亮度数据获取模块10包括显示控制单元11和显示亮度数据获取单元12；显示控制单元11与显示面板电连接，设置为控制显示面板进行显示；显示亮度数据获取单元12与显示亮度数据处理模块20电连接，设置为获取显示面板在预设时间段内的多个显示亮度数据，并将多个显示亮度数据传输至显示亮度数据处理模块20。
图12是本申请实施例提供的另一种显示面板的闪烁调试装置的结构示意图。结合图11和图12，可选地，在上述多个实施例的基础上，显示控制单元11包括信号发生器(Pattern Generator，PG)111，显示亮度数据获取单元12包括色度计121，显示亮度数据处理模块20和闪烁程度参数确定模块30均配置于计算机50中。
显示面板的闪烁调试装置还可以包括产品载台60，在确定显示面板的闪烁程度参数时，可以将显示面板70平放在产品载台60上，通过信号发生器111控制显示面板70在预设刷新频率下以目标灰阶进行显示，将色度计121放置于显示面板70显示侧的正上方的中间位置，以通过色度计121获取显示面板70在预设时间段内的多个显示亮度数据，并将该多个显示亮度数据传输至计算机50中的显示亮度数据处理模块20和闪烁程度参数确定模块30，通过显示亮度数据处理模块20对多个显示亮度数据进行傅里叶变换，得到多个显示亮度数据 的频域信号，再对多个显示亮度数据的频域信号与预设权重系数的乘积进行傅里叶逆变换，得到多个显示亮度数据在预设时间段内的时域信号，以通过闪烁程度参数确定模块30确定多个显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的最大值、最小值和对比参考值，根据每个时间段内的显示亮度数据的最大值和最小值之差与对比参考值的比值，确定每个第一时间段内的显示亮度数据的变化率，从而根据多个第一时间段内的显示亮度数据的变化率，确定显示面板的闪烁程度参数。计算机50还可以根据闪烁程度参数对显示面板进行调试，以改善显示面板的闪烁程度。

Claims (17)

  1. 一种显示面板的闪烁调试方法，包括：
    获取显示面板在预设时间段内的多个显示亮度数据；
    对所述多个显示亮度数据进行处理，得到时域上连续的所述多个显示亮度数据的时域信号；
    根据所述多个显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的变化率，确定所述显示面板的闪烁程度参数；其中，每个第一时间段的时长根据人眼的视觉暂留时间确定，且所述预设时间段的时长大于每个所述第一时间段的时长；
    根据所述闪烁程度参数确定是否对所述显示面板进行调试。
  2. 根据权利要求1所述的显示面板的闪烁调试方法，其中，所述对所述多个显示亮度数据进行处理，得到时域上连续的所述多个显示亮度数据的时域信号，包括：
    对所述多个显示亮度数据进行傅里叶变换，得到所述多个显示亮度数据的频域信号；
    对所述多个显示亮度数据的频域信号与预设权重系数的乘积进行傅里叶逆变换，得到所述多个显示亮度数据在所述预设时间段内的时域信号；其中，所述预设权重系数为所述人眼对于闪烁的敏感度系数，不同刷新频率范围对应的所述敏感度系数不同。
  3. 根据权利要求1所述的显示面板的闪烁调试方法，在所述根据所述多个显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的变化率，确定所述显示面板的闪烁程度参数之前，还包括：
    去除所述多个显示亮度数据的时域信号中的第二时间段内的数据；其中，所述第二时间段为所述预设时间段内的开始阶段和结尾阶段的至少之一，所述第二时间段的时长小于所述预设时间段的时长的二分之一，且所述预设时间段的时长与二倍的所述第二时间段的时长之差大于每个所述第一时间段的时长。
  4. 根据权利要求1所述的显示面板的闪烁调试方法，其中，每个所述第一时间段的时长为24Hz刷新频率所对应的一帧时长。
  5. 根据权利要求1所述的显示面板的闪烁调试方法，其中，所述根据所述多个显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的变化率，确定所述显示面板的闪烁程度参数，包括：
    确定所述多个显示亮度数据的时域信号中每个所述第一时间段内的显示亮度数据的最大值、最小值和对比参考值；其中，所述对比参考值包括每个所述 第一时间段内的所述显示亮度数据的最大值或平均值；
    根据每个所述第一时间段内的所述显示亮度数据的最大值和最小值之差与所述对比参考值的比值，确定每个所述第一时间段内的所述显示亮度数据的变化率；
    根据所述多个第一时间段内的所述显示亮度数据的变化率，确定所述显示面板的闪烁程度参数。
  6. 根据权利要求5所述的显示面板的闪烁调试方法，其中，每个所述第一时间段内的所述显示亮度数据的变化率计算为：
    ΔL/L＝(Max-Min)/M*100％；
    其中，ΔL/L为每个所述第一时间段内的所述显示亮度数据的变化率，Max为每个所述第一时间段内的所述显示亮度数据的最大值，Min为每个所述第一时间段内的所述显示亮度数据的最小值，M为所述对比参考值。
  7. 根据权利要求5所述的显示面板的闪烁调试方法，其中，所述显示面板的闪烁程度参数为所述多个第一时间段内的显示亮度数据的变化率中的最大值或平均值。
  8. 根据权利要求1所述的显示面板的闪烁调试方法，其中，所述多个显示亮度数据包括所述显示面板在预设刷新频率下以不同灰阶进行显示时，多个灰阶对应的所述预设时间段内的显示亮度数据；
    所述根据所述闪烁程度参数确定是否对所述显示面板进行调试，包括：
    确定所述预设刷新频率下每个灰阶的闪烁程度参数及所述闪烁程度参数的标准值；
    在所述闪烁程度参数大于所述闪烁程度参数的标准值时，确定所述闪烁程度参数对应的灰阶的闪烁程度不满足闪烁规格；
    在所述闪烁程度参数小于或等于所述闪烁程度参数的标准值时，确定所述闪烁程度参数对应的灰阶的闪烁程度满足闪烁规格；
    根据所述多个灰阶的闪烁程度中满足闪烁规格的比例，确定是否对所述显示面板进行相应的调试。
  9. 根据权利要求8所述的显示面板的闪烁调试方法，其中，所述闪烁程度参数的标准值为所述人眼无法识别的闪烁程度对应的闪烁程度参数值，所述多个灰阶中的每个灰阶都具有对应的闪烁程度参数的标准值。
  10. 根据权利要求8所述的显示面板的闪烁调试方法，其中，所述根据所述多个灰阶的闪烁程度中满足闪烁规格的比例，确定是否对所述显示面板进行相 应的调试，包括：
    在所述预设刷新频率下的任一灰阶的闪烁程度不满足所述闪烁规格的情况下，确定所述预设刷新频率的闪烁程度不满足所述闪烁规格，对所述显示面板进行调试；
    在所述预设刷新频率下的每个灰阶的闪烁程度均满足所述闪烁规格的情况下，确定所述预设刷新频率的闪烁程度满足所述闪烁规格。
  11. 根据权利要求1-3中任一项所述的显示面板的闪烁调试方法，其中，在根据所述闪烁程度参数确定对所述显示面板进行调试的情况下，对所述显示面板进行调试的方式包括以下至少之一：调整像素电路的驱动时序、调整初始化信号的电压值、以及调整电源电压。
  12. 根据权利要求11所述的显示面板的闪烁调试方法，其中，所述调整像素电路的驱动时序包括：延长一帧画面的数据写入时间，或者在所述像素电路的驱动时序中加入补偿阶段或预充阶段。
  13. 根据权利要求11所述的显示面板的闪烁调试方法，其中，所述初始化信号为对驱动晶体管的栅极进行初始化的信号；所述调整初始化信号的电压值包括：调整像素电路的驱动晶体管的栅极和初始化信号输入端的电压差。
  14. 根据权利要求11所述的显示面板的闪烁调试方法，其中，所述电源电压为在发光阶段与发光器件的阳极电连接的电源电压。
  15. 一种显示面板的闪烁调试装置，包括：
    显示亮度数据获取模块，设置为获取显示面板在预设时间段内的多个显示亮度数据；
    显示亮度数据处理模块，设置为对所述多个显示亮度数据进行处理，得到时域上连续的所述多个显示亮度数据的时域信号；
    闪烁程度参数确定模块，设置为根据所述多个显示亮度数据的时域信号中多个第一时间段内的显示亮度数据的变化率，确定所述显示面板的闪烁程度参数；其中，每个第一时间段的时长根据人眼的视觉暂留时间确定，且所述预设时间段的时长大于每个所述第一时间段的时长；
    调试模块，设置为根据所述闪烁程度参数确定是否对所述显示面板进行调试。
  16. 根据权利要求15所述的显示面板的闪烁调试装置，其中，所述显示亮度数据获取模块包括：
    显示控制单元，与所述显示面板电连接，设置为控制所述显示面板进行显 示；
    显示亮度数据获取单元，与所述显示亮度数据处理模块电连接，设置为获取所述显示面板在预设时间段内的多个显示亮度数据，并将所述多个显示亮度数据传输至所述显示亮度数据处理模块。
  17. 根据权利要求16所述的显示面板的闪烁调试装置，其中，所述显示控制单元包括信号发生器，所述显示亮度数据获取单元包括色度计，所述显示亮度数据处理模块和所述闪烁程度参数确定模块均配置于计算机中。
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