WO2023115467A1 - 显示装置及其显示方法 - Google Patents

显示装置及其显示方法 Download PDF

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Publication number
WO2023115467A1
WO2023115467A1 PCT/CN2021/140912 CN2021140912W WO2023115467A1 WO 2023115467 A1 WO2023115467 A1 WO 2023115467A1 CN 2021140912 W CN2021140912 W CN 2021140912W WO 2023115467 A1 WO2023115467 A1 WO 2023115467A1
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WO
WIPO (PCT)
Prior art keywords
display device
target
frequency
display
backlight
Prior art date
Application number
PCT/CN2021/140912
Other languages
English (en)
French (fr)
Inventor
刘露
Original Assignee
Tcl华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Tcl华星光电技术有限公司 filed Critical Tcl华星光电技术有限公司
Priority to US17/623,595 priority Critical patent/US12073798B2/en
Publication of WO2023115467A1 publication Critical patent/WO2023115467A1/zh

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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 by control of light from an independent source
    • G09G3/3406Control of illumination source
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0247Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00Aspects of display data processing
    • G09G2340/04Changes in size, position or resolution of an image
    • G09G2340/0407Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0435Change or adaptation of the frame rate of the video stream

Definitions

  • the present application relates to the field of display technology, in particular to a display device and a display method thereof.
  • Freesync variable refresh rate technology
  • AMD manufacturers which can solve image tearing and fluctuations, thereby improving the smooth game experience. It is also officially called variable refresh rate technology (Dynamic Refresh Rate Technology).
  • Refresh Rate which is by changing the field blanking (Vertical Blanking, VBlank) stage to dynamically adjust the refresh rate of the display panel, so that the refresh rate of the display panel matches the refresh rate of the graphics card, thereby solving the problem of tearing and fluctuation of the picture displayed on the display panel, and improving the fluency of the picture.
  • the display panel will generate different magnitudes of leakage current, and the different magnitudes of leakage current will cause the brightness of the picture displayed by the display panel to be different. Therefore, when the refresh rate of the display device changes, the display The device will flicker.
  • Display devices of the current technology have a technical problem of flickering when the refresh rate changes.
  • An embodiment of the present application provides a display method of a display device, including:
  • the step of obtaining the target display frequency and the target backlight brightness value of the target display device it also includes:
  • the enabling signal including a vertical blanking period
  • the vertical blanking period when the refresh mode of the target display device is a fixed display frequency, the vertical blanking period is configured as a fixed vertical blanking period; when the refresh mode of the target display device is a variable display frequency, the The vertical blanking period is configured as a variable vertical blanking period.
  • the step of acquiring the target display frequency and the target backlight brightness value of the target display device includes:
  • the frequency usage time ratio of the second display frequency is greater than or equal to a first threshold
  • the second display frequency is set as the target display frequency of the target display device, and the backlight brightness value corresponding to the second display frequency is set as the target backlight brightness value of the target display device.
  • the step of acquiring the target display frequency and the target backlight brightness value of the target display device further includes:
  • the fourth display frequency is set as the target display frequency of the target display device, and the backlight brightness value corresponding to the fourth display frequency is set as the target backlight brightness value of the target display device.
  • the step of determining the backlight brightness compensation value of the target display device in a preset period comprising:
  • the target display frequency when the target display frequency is greater than the first display frequency, within the time period corresponding to the third refresh duration of the backlight unit, determine the The step of the target displaying the backlight brightness compensation value of the preset period includes:
  • the preset period determine the time length t and the number of refresh times N required for the backlight unit to be refreshed once by the backlight driving chip of the display device in a time period corresponding to the third refresh time length, where t is greater than 0 , N is a positive integer;
  • the backlight driver chip starts to compensate the brightness of the backlight unit to determine that the target display device is Set a periodic backlight brightness compensation value, where n is less than or equal to N and is a positive integer.
  • the backlight driving chip controls the backlight unit
  • the brightness compensation value of the backlight driver chip is the same for each refresh period t of the backlight unit.
  • the step of determining the backlight brightness compensation value of the target display device in a preset period further comprising:
  • the display method of the display device provided in the embodiment of the present application, in the step of compensating the first backlight brightness value according to the backlight brightness compensation value, the brightness value after compensation of the first backlight brightness value It is equal to the target backlight brightness value.
  • an embodiment of the present application provides a display method of a display device, including:
  • the first backlight brightness value is compensated according to the backlight brightness compensation value.
  • the step of acquiring the target display frequency and the target backlight brightness value of the target display device includes:
  • the frequency usage time ratio of the second display frequency is greater than or equal to a first threshold
  • the second display frequency is set as the target display frequency of the target display device, and the backlight brightness value corresponding to the second display frequency is set as the target backlight brightness value of the target display device.
  • the step of acquiring the target display frequency and the target backlight brightness value of the target display device further includes:
  • the fourth display frequency is set as the target display frequency of the target display device, and the backlight brightness value corresponding to the fourth display frequency is set as the target backlight brightness value of the target display device.
  • the step of determining the backlight brightness compensation value of the target display device in a preset period comprising:
  • the target display frequency when the target display frequency is greater than the first display frequency, within the time period corresponding to the third refresh duration of the backlight unit, determine the The step of the target displaying the backlight brightness compensation value of the preset period includes:
  • the preset period determine the time length t and the number of refresh times N required for the backlight unit to be refreshed once by the backlight driving chip of the display device in a time period corresponding to the third refresh time length, where t is greater than 0 , N is a positive integer;
  • the backlight driver chip starts to compensate the brightness of the backlight unit to determine that the target display device is Set a periodic backlight brightness compensation value, where n is less than or equal to N and is a positive integer.
  • the backlight driving chip controls the backlight unit
  • the brightness compensation value of the backlight driver chip is the same for each refresh period t of the backlight unit.
  • the step of determining the backlight brightness compensation value of the target display device in a preset period further comprising:
  • the display method of the display device provided in the embodiment of the present application, in the step of compensating the first backlight brightness value according to the backlight brightness compensation value, the brightness value after compensation of the first backlight brightness value It is equal to the target backlight brightness value.
  • an embodiment of the present application provides a display device, including: a first acquisition module, a second acquisition module, a processing module, and a compensation module;
  • the first obtaining module is used to obtain the target display frequency and the target backlight brightness value of the target display device
  • the second obtaining module is used to obtain the first display frequency and the first display frequency of the target display device in a preset period.
  • the processing module is used to determine the target display device according to the difference between the target display frequency and the first display frequency when the first display frequency is different from the target display frequency
  • the compensation module is configured to compensate the first backlight brightness value according to the backlight brightness compensation value in a preset period.
  • the first acquiring module is further configured to acquire a refresh mode of the target display device
  • the vertical blanking period of the target display device when the refresh mode of the target display device is a fixed display frequency, the vertical blanking period of the target display device is configured as a fixed vertical blanking period; when the refresh mode of the target display device is a variable display frequency, the vertical blanking period is configured as a variable vertical blanking period.
  • the processing module is further configured to acquire the target display frequency and the first display frequency when the first display frequency is different from the target display frequency difference, and obtain the first refresh duration of a display frame when the backlight unit of the display device corresponds to the target display frequency stage, and the second refresh of a display frame when corresponding to the first display frequency stage duration;
  • the processing module is further configured to obtain a third refresh duration of the backlight unit, and the third refresh duration is the difference between the second refresh duration and the first refresh duration difference.
  • the compensation module is configured to adjust the brightness value after compensation of the first backlight brightness value to the target backlight brightness value.
  • An embodiment of the present application provides a display device and a display method thereof; the display method includes: first acquiring the target display frequency and the target backlight brightness value of the target display device, and secondly acquiring the first display frequency of the target display device in a preset period and the first backlight brightness value, and then when the first display frequency is different from the target display frequency, according to the difference between the target display frequency and the first display frequency, it is determined that the target display device is at the preset Set a periodic backlight brightness compensation value, and finally compensate the first backlight brightness value according to the backlight brightness compensation value; the above display method first determines the difference between the target display frequency and the first display frequency The backlight brightness compensation value of the target display device in a preset period, and then compensate the first backlight brightness value according to the backlight brightness compensation value, thereby compensating the first backlight brightness value by controlling the backlight brightness of the display device.
  • the brightness change caused by switching the frequency of the display device in the variable refresh rate mode can effectively reduce the flickering phenomenon generated during the frequency switching process of the
  • FIG. 1 is a flowchart of a display method of a display device provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of a brightness compensation method in the display method of the display device provided by the embodiment of the present application;
  • FIG. 3 is a structural block diagram of a display device provided by an embodiment of the present application.
  • the embodiment of the present application aims at the technical problem that the brightness of the edge screen is lower than that of the center screen due to the use of the edge curved screen of the current technology display panel, and the embodiment of the present application can solve the above technical problem.
  • the present invention provides a display method of a display device, and the method includes but is not limited to the following embodiments and combinations of the following embodiments.
  • FIG. 1 it is a flow chart of an embodiment of a brightness adjustment method provided in an embodiment of the present application; the brightness adjustment method includes but is not limited to the following steps.
  • the S10 also includes:
  • the target display device includes a display panel and a backlight module located on one side of the display panel; the display panel includes pixel units arranged in an array, each pixel unit includes at least one sub-pixel, and the sub-pixel includes a pixel electrode, The common electrode and the liquid crystal layer arranged between the pixel electrode and the common electrode; in addition, the liquid crystal display panel also includes a plurality of thin film transistors, the gate of each thin film transistor is connected to the gate line, and the source electrode of each thin film transistor is connected to the data line connected, the drain of each thin film transistor is connected to the pixel electrode of the sub-pixel.
  • the backlight module has a local backlight adjustment function, which can realize the partition display of the backlight, and adjust the backlight to make it brighter when the screen needs to display a dark state. Get low or even no light.
  • the backlight module includes a plurality of backlight units and a backlight driving chip, and the backlight driving chip controls the backlight units to emit light.
  • the backlight unit is a Mini-LED (mini light-emitting diode) backlight unit, and the mini-light-emitting diode unit can have more partitions to light up, which will make the contrast effect of the display screen of the display device more delicate , to further improve the picture contrast.
  • Mini-LED mini light-emitting diode
  • the commonly used driving modes of the Mini-LED backlight unit are PWM (Pulse Width Modulation) mode and PAM (Pulse Amplitude Modulation) mode.
  • PWM Pulse Width Modulation
  • PAM Pulse Amplitude Modulation
  • the display frequency of the display panel may be 48 Hz to 165 Hz
  • the fixed frequency of the backlight module may be any one of 1920 Hz, 2400 Hz and 3840 Hz.
  • the step before acquiring the target display frequency and the target backlight brightness value of the target display device further includes:
  • the gamma voltage correction device uses the gamma voltage correction device to correct the actual brightness value of each grayscale picture of the target display device at each different display frequency, so that the actual brightness value of each grayscale picture meets the brightness when the Gamma value is 2.2 value, so as to obtain the gamma voltage data of the target display device at different display frequencies, a plurality of vertical blanking durations, and the refresh rate corresponding to each vertical blanking duration, wherein the gamma voltage data include mutually unequal gamma voltages corresponding to the first refresh rate and the second refresh rate respectively.
  • the gamma voltage data includes gamma voltages respectively corresponding to the unequal first refresh rate and the second refresh rate.
  • the first refresh rate is preferably the highest refresh rate of the display panel
  • the second refresh rate is preferably the lowest refresh rate of the display panel
  • the gamma voltage corresponding to each refresh rate includes a one-to-one correspondence with multiple gray levels of the display panel. multiple sub-gamma voltages.
  • the time period between the start of displaying one frame of image and the start of displaying the next frame of image on the display panel is called a frame period, and a frame period includes a display phase and a vertical blanking phase.
  • the durations of multiple vertical blanking periods (ie, vertical blanking durations) and the refresh rate corresponding to each vertical blanking duration are stored in the gamma voltage correction device in advance. It should be noted that the number of pre-stored vertical blanking durations can be set according to the actual situation. If the number of pre-stored vertical blanking durations is larger, the pre-stored refresh rate will be more.
  • variable refresh rate interval of the display panel is 48-165Hz
  • the grayscale interval is 0-255 grayscale
  • the first refresh rate is 165Hz
  • the second refresh rate is 48Hz.
  • the gamma voltages corresponding to the first refresh rate of 165 Hz include: sub-gamma voltage a0 corresponding to grayscale 0, sub-gamma voltage a1 corresponding to grayscale 1, . . . , sub-gamma voltage a255 corresponding to grayscale 255.
  • the gamma voltages corresponding to the second refresh rate of 48 Hz include: sub-gamma voltage b0 corresponding to grayscale 0, sub-gamma voltage b1 corresponding to grayscale 1, . . .
  • sub-gamma voltage b255 corresponding to grayscale 255.
  • the multiple pre-stored vertical blanking durations are 1, 2, 4, 7, 9, 12, 20, 30 and 45 respectively, and the multiple refresh rates corresponding to the multiple pre-stored vertical blanking durations are 165Hz respectively. , 110Hz, 100Hz, 90Hz, 80Hz, 70Hz, 60Hz, and 48Hz.
  • an enable signal is input to the timing controller of the display device, the enable signal includes a vertical blanking period.
  • the timing controller receives image data input from an external source, and parses out a first data enable signal according to the image data.
  • the first data enable signal shows a plurality of frame periods of the display panel.
  • the gamma voltage correction device takes the end time of the display phase in the current frame period as the start time, acquires the time difference between the current time and the start time in real time, and uses it as the real time Get the duration of the vertical blanking phase in the current frame period.
  • the enable signal is a data enable signal
  • the data enable signal is defined as including the number of vertical effective display lines and the vertical blanking period of each frame of video, and the number of vertical effective display lines represents a frame of picture
  • the number of pixel rows in the effective display area, and the vertical blanking period represents the sum of the charging time of each pixel row.
  • the number of vertical effective display rows is defined as including the number of horizontal effective display pixels per pixel row and the horizontal blanking period, the number of horizontal effective display pixels represents the number of pixels in each pixel row, and the horizontal blanking period represents the number of pixels in each pixel row. line charging time.
  • the product of the number of vertical effective display lines and the sum of the vertical blanking period, the number of horizontal effective display pixels and the sum of the horizontal blanking period is relatively fixed, and is only related to the frame rate and pixel clock frequency of the screen display; and The number of vertical effective display lines and the number of horizontal effective display pixels are related to the resolution. Therefore, the vertical blanking period and the horizontal blanking period change relatively. When the vertical blanking period increases, the horizontal blanking period will decrease relatively; on the contrary The same is true.
  • the vertical blanking period and the horizontal blanking period may use clock numbers to represent their values, and the clock number may be the number of pixel clocks.
  • the refresh mode of the target display device is acquired. Specifically, in the current frame period of the display panel, the gamma voltage correction device acquires the first duration of the vertical blanking phase in the current display frame period and the second duration of the vertical blanking phase in the next display frame period in real time. duration.
  • the vertical blanking period is configured as a fixed vertical blanking period, and the refresh mode of the target display device is a fixed display frequency; If the second duration is not equal to the first duration, the vertical blanking period is configured as a variable vertical blanking period, and the refresh mode of the target display device is a variable display frequency. .
  • the refresh mode of the target display device is the fixed display frequency mode
  • the fixed display frequency is set as the target display frequency of the target display device at this time
  • the backlight brightness value corresponding to the fixed display frequency is set to the specified The target backlight brightness value of the target display device.
  • the refresh mode of the target display device is the variable display frequency mode
  • the second display frequency of the target display device is obtained, and the frequency usage time ratio of the second display frequency is greater than or equal to the first threshold; at this time, the second display frequency is set as the target display frequency
  • the target display frequency of the device and the backlight brightness value corresponding to the second display frequency are set as the target backlight brightness value of the target display device; at this time, the second display frequency is the maximum Common frequency of use.
  • the third display frequency of the target display device is obtained, and the proportion of the frequency use time of the third display frequency is less than the first threshold; at this time, since the third display frequency is not the time when the user uses the display panel The most commonly used frequency, therefore, it is not appropriate to set the third display frequency as the target display frequency of the target display device.
  • the fourth display frequency of the target display device is obtained, and the duration ratio of the fourth display frequency is greater than or equal to the first threshold; and the fourth display frequency is set as the target of the target display device
  • the display frequency and the backlight brightness value corresponding to the fourth display frequency are set as the target backlight brightness value of the target display device.
  • the fourth display frequency is the most frequently used frequency for the user to use the display panel. Therefore, the fourth most frequently used display frequency by the user using the display panel is set as the target display frequency of the target display device.
  • the target display frequency may be any one of 60Hz, 75Hz, 120Hz, 144Hz and 165Hz.
  • the S20 also includes:
  • the preset period is at least one time period for displaying a frame picture. Specifically, after acquiring the target display frequency and the target backlight brightness value of the target display device in the current display frame; then, after one preset period, acquire the first display frequency and the first backlight brightness value of the target display device Brightness value.
  • the preset period is the corresponding duration when the user uses the target display device between the initial application scene and the target application scene; wherein, in the initial application scene, the target display device The display frequency is the target display frequency, and the target backlight brightness value of the display device is the target backlight brightness value.
  • the preset period includes at least one display frame duration. S30. When the first display frequency is different from the target display frequency, determine the backlight brightness compensation of the target display device in a preset period according to the difference between the target display frequency and the first display frequency value;
  • the S30 also includes:
  • the first display frequency is the same as the target display frequency, there is no need to compensate the brightness of the backlight at the first display frequency.
  • the first display frequency is different from the target display frequency, the backlight brightness of the first display frequency needs to be compensated.
  • the difference is greater than 0, that is, the target display frequency is greater than the first display frequency.
  • the step of determining the backlight brightness compensation value of the target display device in a preset period includes:
  • the second refresh duration is not equal to the first refresh duration.
  • a third refresh duration of the backlight unit is acquired, where the third refresh duration is a difference between the second refresh duration and the first refresh duration.
  • the first refresh duration is the duration required for the corresponding backlight unit to refresh a total number of times n1 within one display frame period when the display device is at the target display frequency, and n1 is a positive integer;
  • the second refresh duration is the duration required for the total refresh times n2 of the corresponding backlight unit in one display frame period when the display device is at the first display frequency, and n2 is a positive integer greater than n1;
  • the third refresh duration is the duration required for the corresponding backlight unit to refresh (n2-n1) times within a display frame period when the display device is at the first display frequency.
  • the step of determining the backlight brightness compensation value of the target display device in a preset period during the time period corresponding to the third refresh duration of the backlight driving chip includes:
  • the backlight drive chip drives the backlight unit to refresh once within the period corresponding to the third refresh duration.
  • the time t required for the backlight driving chip to drive the backlight unit to refresh once within the time period corresponding to the third refresh time is the time t required for the backlight driving chip to drive the backlight at the corresponding first display frequency.
  • the time required for one refresh of the unit; the number N of times N that the backlight driver chip drives the refresh of the backlight unit within the time period corresponding to the third refresh duration is n2-n1.
  • the backlight driver chip starts to compensate the brightness of the backlight unit to determine that the target display device is The backlight brightness compensation value of the preset period, wherein, n is less than or equal to N and is a positive integer.
  • the backlight drive chip starts The time of n times of refreshing is the start time, and the time when the backlight unit starts the Nth time of refreshing within the time period corresponding to the third refresh time is the end time.
  • the preset period is a time period between the end moment and the start moment.
  • the backlight driver chip starts to compensate the brightness value of the backlight unit when it is refreshed at least once.
  • the backlight driving chip may only compensate the brightness value of the backlight unit when it is refreshed once, and the backlight driving chip may also compensate the brightness value of the backlight unit when it is refreshed once.
  • the backlight driver chip compensates the backlight units with the same sum of backlight brightness compensation values within the preset period.
  • the brightness compensation value of the backlight driver chip for the backlight unit is the same within the duration t of each refresh.
  • the difference is less than 0, that is, the target display frequency is less than the first display frequency.
  • the step of determining the backlight brightness compensation value of the target display device in a preset period includes:
  • the first refresh duration of a display frame picture when the backlight unit of the display device corresponds to the target display frequency stage, and the second refresh duration of a display frame picture corresponding to the first display frequency stage are acquired.
  • the second refresh duration is shorter than the first refresh duration.
  • the S40 also includes:
  • the backlight brightness compensation value is a positive value
  • the backlight driver chip drives the backlight unit to increase the brightness of the first backlight brightness value, so that the compensated The first backlight brightness value is equal to the target brightness value.
  • the backlight brightness compensation value is a negative value
  • the backlight driver chip drives the backlight unit to reduce the brightness of the first backlight brightness value, so that the compensated The first backlight brightness value is equal to the target brightness value.
  • FIG. 2 it is a schematic diagram of a brightness compensation method in the display method of the display device provided by the embodiment of the present application; wherein, the target display frequency is set to 120Hz, and the first display frequency is set to 60Hz , the fixed refresh frequency of the backlight unit is set to 2400Hz.
  • the timing control chip Timer Control Register, TCON
  • system-on-a-chip System-on-a-Chip, SOC
  • the field programmable gate array chip Field of the backlight module
  • the Programmable Gate Array FPGA
  • VSync Vertical Synchronization
  • the backlight driver chip adjusts the backlight unit to emit light.
  • the backlight unit refreshes 20 times in the picture with a display frequency of 120 Hz, and refreshes 40 times in the picture with a display frequency of 60 Hz.
  • the backlight driver chip can count its own refresh times, and each refresh count is after the STV signal (picture frame start signal) appears.
  • the display frequency is 120 Hz
  • the duration of a display frame of the display panel is the shortest, and at this time, the refresh times of the backlight unit are the lowest.
  • the backlight brightness of the backlight unit in the first 20 refresh periods when the display frequency is 60 Hz is the same as the backlight brightness of the backlight unit in the first 20 refresh periods when the display frequency is 120 Hz.
  • the embodiment of the present application provides a display method of a display device; the display method includes: first acquiring the target display frequency and the target backlight brightness value of the target display device, and secondly acquiring the first display frequency of the target display device in a preset period and the first backlight brightness value, and then when the first display frequency is different from the target display frequency, according to the difference between the target display frequency and the first display frequency, it is determined that the target display device is at the preset Set a periodic backlight brightness compensation value, and finally compensate the first backlight brightness value according to the backlight brightness compensation value; the above display method first determines the difference between the target display frequency and the first display frequency The backlight brightness compensation value of the target display device in a preset period, and then compensate the first backlight brightness value according to the backlight brightness compensation value, thereby compensating the first backlight brightness value by controlling the backlight brightness of the display device.
  • the brightness change caused by switching the frequency of the display device in the variable refresh rate mode can effectively reduce the flickering phenomenon generated during the frequency switching process of the display
  • FIG. 3 it is a structural block diagram of a display device according to an embodiment of the present application.
  • the embodiment of the present application provides a display device 100, and the display device 100 includes:
  • the first obtaining module 101 is used to obtain the target display frequency and the target backlight brightness value of the target display device;
  • the second acquiring module 102 is configured to acquire the first display frequency and the first backlight brightness value of the target display device in a preset period;
  • a processing module 103 configured to, when the first display frequency is different from the target display frequency, determine that the target display device is within a preset period according to the difference between the target display frequency and the first display frequency The backlight brightness compensation value of ;
  • the compensation module 104 is configured to compensate the first backlight brightness value according to the backlight brightness compensation value.
  • the first acquisition module 101 is further configured to input an enable signal to the timing controller of the display device, the enable signal includes a vertical blanking period;
  • the vertical blanking period when the refresh mode of the target display device is a fixed display frequency, the vertical blanking period is configured as a fixed vertical blanking period; when the refresh mode of the target display device is a variable display frequency, the The vertical blanking period is configured as a variable vertical blanking period.
  • the first obtaining module 101 is further configured to obtain the usage time ratio of different display frequencies of the target display device in a historical period;
  • the second display frequency is set as the target display frequency of the target display device, and the second display frequency corresponds to The backlight brightness value of is set as the target backlight brightness value of the target display device.
  • the first acquiring module 101 is further configured to acquire the third display frequency of the target display device when the duration ratio of the second display frequency among the different display frequencies is less than the first threshold , the duration ratio of the third display frequency is greater than or equal to the first threshold;
  • the third display frequency is set as the target display frequency of the target display device, and the backlight brightness value corresponding to the third display frequency is set as the target backlight brightness value of the target display device.
  • the processing module 103 is further configured to acquire a difference between the target display frequency and the first display frequency when the first display frequency is different from the target display frequency;
  • the processing module is further configured to determine, within the preset period, that the backlight driving chip of the display device corresponds to the third refresh duration.
  • the backlight driver chip When the backlight unit is refreshed for the nth time within the time period corresponding to the third refresh duration, the backlight driver chip is turned on to compensate the brightness of the backlight unit to determine that the target display device is Set a periodic backlight brightness compensation value, where n is less than or equal to N and is a positive integer.
  • the brightness compensation value of the backlight driver chip for the backlight unit is the same within the duration t of each refresh.
  • the processing module 103 is further configured to obtain the first refresh of a display frame when the backlight unit of the display device corresponds to the target display frequency stage when the difference is less than 0 Duration, and the second refresh duration of a display frame when corresponding to the first display frequency stage;
  • the compensation module 104 performs compensation on the first backlight brightness value to obtain a brightness value equal to the target backlight brightness value.
  • An embodiment of the present application provides a display device and a display method thereof; the display method includes: first acquiring the target display frequency and the target backlight brightness value of the target display device, and secondly acquiring the first display frequency of the target display device in a preset period and the first backlight brightness value, and then when the first display frequency is different from the target display frequency, according to the difference between the target display frequency and the first display frequency, it is determined that the target display device is at the preset Set a periodic backlight brightness compensation value, and finally compensate the first backlight brightness value according to the backlight brightness compensation value; the above display method first determines the difference between the target display frequency and the first display frequency The backlight brightness compensation value of the target display device in a preset period, and then compensate the first backlight brightness value according to the backlight brightness compensation value, thereby compensating the first backlight brightness value by controlling the backlight brightness of the display device.
  • the brightness change caused by switching the frequency of the display device in the variable refresh rate mode can effectively reduce the flickering phenomenon generated during the frequency switching process of the

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Abstract

一种显示装置及其显示方法,显示方法包括:首先获取目标显示装置的目标显示频率、目标背光亮度值、第一显示频率以及第一背光亮度值,之后当第一显示频率和目标显示频率相异时,根据目标显示频率和第一显示频率的差值,确定目标显示装置在预设周期的背光亮度补偿值,最后根据背光亮度补偿值,对第一背光亮度值进行补偿。

Description

显示装置及其显示方法 技术领域
本申请涉及显示技术领域,具体涉及一种显示装置及其显示方法。
背景技术
近年来电竞市场的火热让不少硬件厂商看到了商机,从而在显示器的选择上也越来越多样化,其中Freesync(可变刷新率技术)已逐渐成为目前主流电竞显示领域的一项关键功能技术指标。Freesync技术最早是由AMD厂商提出的一项技术,可解决图像撕裂和波动,从而提高画面流畅的游戏体验,官方也称为可变刷新率技术(Dynamic Refresh Rate,DRR),其是通过改变显示面板的帧周期中的场消隐(Vertical Blanking,VBlank)阶段的时长来动态调节显示面板的刷新率,以使显示面板的刷新率与显卡的刷新率匹配,从而解决显示面板显示的画面撕裂和波动的问题,提高画面的流畅性。
然而,由于场消隐阶段的时长不同会导致显示面板产生不同大小的漏电流,而不同大小的漏电流会导致显示面板显示的画面的亮度不同,因此,当显示装置的刷新率变化时,显示装置会出现闪烁现象。
因此,亟需一种显示装置及其显示方法以解决上述技术问题。
技术问题
当前技术的显示装置在刷新率变化时存在闪烁现象的技术问题。
技术解决方案
本申请实施例提供一种显示装置的显示方法,包括:
获取目标显示装置的目标显示频率和目标背光亮度值;
获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值;
当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值;
根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿;
其中,在所述获取目标显示装置的目标显示频率和目标背光亮度值的步骤之前,还包括:
输入使能信号至所述显示装置的时序控制器,所述使能信号包括垂直消隐周期;
获取所述目标显示装置的刷新模式;
其中,当所述目标显示装置的刷新模式为固定显示频率时,所述垂直消隐周期被配置为一固定垂直消隐周期;当所述目标显示装置的刷新模式为可变显示频率时,所述垂直消隐周期被配置为一可变垂直消隐周期。
在本申请实施例所提供的显示装置的显示方法中,所述获取目标显示装置的目标显示频率和目标背光亮度值的步骤,包括:
获取所述目标显示装置在历史周期中不同显示频率的使用时长占比;
获取所述目标显示装置的第二显示频率,所述第二显示频率的频率使用时长占比大于或等于第一阈值;
将所述第二显示频率设定为所述目标显示装置的目标显示频率,以及所述第二显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值。
在本申请实施例所提供的显示装置的显示方法中,所述获取目标显示装置的目标显示频率和目标背光亮度值的步骤,还包括:
获取所述目标显示装置在历史周期中不同显示频率的使用时长占比;
获取所述目标显示装置的第三显示频率,所述第三显示频率的频率使用时长占比小于第一阈值;
获取所述目标显示装置的第四显示频率,所述第四显示频率的时长占比大于或等于第一阈值;
将所述第四显示频率设定为所述目标显示装置的目标显示频率,以及所述第四显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值。
在本申请实施例所提供的显示装置的显示方法中,所述当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,包括:
当所述第一显示频率和所述目标显示频率相异时,获取所述目标显示频率和所述第一显示频率的差值;
获取所述显示装置的背光单元对应所述目标显示频率阶段时在一显示帧画面的第一刷新时长,以及对应所述第一显示频率阶段时在一显示帧画面的第二刷新时长;
当所述差值大于0时,获取所述背光单元的第三刷新时长,所述第三刷新时长为所述第二刷新时长与所述第一刷新时长的差值;
在所述背光单元对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。
在本申请实施例所提供的显示装置的显示方法中,当所述目标显示频率大于所述第一显示频率时,在所述背光单元对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,包括:
在所述预设周期内,确定所述显示装置的背光驱动芯片在对应所述第三刷新时长的时间段内所述背光单元刷新一次所需要的时长t以及刷新次数N,其中,t大于0,N为正整数;
当所述背光单元在对应所述第三刷新时长的时间段内第n次刷新时,所述背光驱动芯片开始对所述背光单元的亮度进行补偿,以确定所述目标显示装置在所述预设周期的背光亮度补偿值,其中,n小于或等于N且为正整数。
在本申请实施例所提供的显示装置的显示方法中,所述当所述背光单元在对应所述第三刷新时长的时间段内第n次刷新时,所述背光驱动芯片对所述背光单元的亮度进行补偿的步骤中,所述背光驱动芯片对所述背光单元在每刷新一次的时长t内的亮度补偿值相同。
在本申请实施例所提供的显示装置的显示方法中,所述当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,还包括:
当所述差值小于0时,在所述背光单元对应所述第二刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。
在本申请实施例所提供的显示装置的显示方法中,根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿的步骤中,所述第一背光亮度值进行补偿后的亮度值与所述目标背光亮度值相等。
相应地,本申请实施例提供一种显示装置的显示方法,包括:
获取目标显示装置的目标显示频率和目标背光亮度值;
获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值;
当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值;
根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿。
在本申请实施例所提供的显示装置的显示方法中,所述获取目标显示装置的目标显示频率和目标背光亮度值的步骤,包括:
获取所述目标显示装置在历史周期中不同显示频率的使用时长占比;
获取所述目标显示装置的第二显示频率,所述第二显示频率的频率使用时长占比大于或等于第一阈值;
将所述第二显示频率设定为所述目标显示装置的目标显示频率,以及所述第二显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值。
在本申请实施例所提供的显示装置的显示方法中,所述获取目标显示装置的目标显示频率和目标背光亮度值的步骤,还包括:
获取所述目标显示装置在历史周期中不同显示频率的使用时长占比;
获取所述目标显示装置的第三显示频率,所述第三显示频率的频率使用时长占比小于第一阈值;
获取所述目标显示装置的第四显示频率,所述第四显示频率的时长占比大于或等于第一阈值;
将所述第四显示频率设定为所述目标显示装置的目标显示频率,以及所述第四显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值。
在本申请实施例所提供的显示装置的显示方法中,所述当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,包括:
当所述第一显示频率和所述目标显示频率相异时,获取所述目标显示频率和所述第一显示频率的差值;
获取所述显示装置的背光单元对应所述目标显示频率阶段时在一显示帧画面的第一刷新时长,以及对应所述第一显示频率阶段时在一显示帧画面的第二刷新时长;
当所述差值大于0时,获取所述背光单元的第三刷新时长,所述第三刷新时长为所述第二刷新时长与所述第一刷新时长的差值;
在所述背光单元对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。
在本申请实施例所提供的显示装置的显示方法中,当所述目标显示频率大于所述第一显示频率时,在所述背光单元对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,包括:
在所述预设周期内,确定所述显示装置的背光驱动芯片在对应所述第三刷新时长的时间段内所述背光单元刷新一次所需要的时长t以及刷新次数N,其中,t大于0,N为正整数;
当所述背光单元在对应所述第三刷新时长的时间段内第n次刷新时,所述背光驱动芯片开始对所述背光单元的亮度进行补偿,以确定所述目标显示装置在所述预设周期的背光亮度补偿值,其中,n小于或等于N且为正整数。
在本申请实施例所提供的显示装置的显示方法中,所述当所述背光单元在对应所述第三刷新时长的时间段内第n次刷新时,所述背光驱动芯片对所述背光单元的亮度进行补偿的步骤中,所述背光驱动芯片对所述背光单元在每刷新一次的时长t内的亮度补偿值相同。
在本申请实施例所提供的显示装置的显示方法中,所述当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,还包括:
当所述差值小于0时,在所述背光单元对应所述第二刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。
在本申请实施例所提供的显示装置的显示方法中,根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿的步骤中,所述第一背光亮度值进行补偿后的亮度值与所述目标背光亮度值相等。
相应地,本申请实施例又提供一种显示装置,包括:第一获取模块、第二获取模块、处理模块以及补偿模块;
其中,所述第一获取模块用于获取目标显示装置的目标显示频率和目标背光亮度值,所述第二获取模块用于获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值,所述处理模块用于当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值,所述补偿模块用于根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿。
在本申请实施例所提供的显示装置中,所述第一获取模块还用于获取所述目标显示装置的刷新模式;
其中,当所述目标显示装置的刷新模式为固定显示频率时,所述目标显示装置的垂直消隐周期被配置为一固定垂直消隐周期;当所述目标显示装置的刷新模式为可变显示频率时,所述垂直消隐周期被配置为一可变垂直消隐周期。
在本申请实施例所提供的显示装置中,所述处理模块还用于当所述第一显示频率和所述目标显示频率相异时,获取所述目标显示频率和所述第一显示频率的差值,并获取所述显示装置的背光单元对应所述目标显示频率阶段时在一显示帧画面的第一刷新时长,以及对应所述第一显示频率阶段时在一显示帧画面的第二刷新时长;
其中,当所述差值大于0时,所述处理模块还用于获取所述背光单元的第三刷新时长,所述第三刷新时长为所述第二刷新时长与所述第一刷新时长的差值。
在本申请实施例所提供的显示装置中,所述补偿模块用于将所述第一背光亮度值进行补偿后的亮度值调整至所述目标背光亮度值。
有益效果
本申请实施例提供一种显示装置及其显示方法;该显示方法包括:首先获取目标显示装置的目标显示频率和目标背光亮度值,其次获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值,之后当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值,最后根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿;上述显示方法首先根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值,之后根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿,从而通过控制所述显示装置的背光源亮度,补偿所述显示装置在可变刷新频率模式下切换频率造成的亮度变化,可以有效降低所述显示装置在可变刷新频率模式下切换频率过程中产生的闪烁现象,进一步提升所述显示装置的显示效果。
附图说明
图1为本申请实施例提供的显示装置的显示方法的流程图;
图2为本申请实施例提供的显示装置的显示方法中的一种亮度补偿方法的示意图;
图3为本申请实施例提供的一种显示装置的结构框图。
本发明的实施方式
本申请实施例针对当前技术的显示面板因采用边缘弯曲的屏幕导致边缘屏幕的亮度比中心屏幕的亮度低的技术问题,本申请实施例能够解决上述技术问题。
本发明提供一种显示装置的显示方法,所述方法包括但不限于以下实施例以及以下实施例的组合。
在一实施例中,如图1所示,为本申请实施例提供的亮度调节方法的实施例流程图;所述亮度调节方法包括但不限于以下步骤。
S10,获取目标显示装置的目标显示频率和目标背光亮度值。
具体地,所述S10还包括:
所述目标显示装置包括显示面板以及位于所述显示面板一侧的背光模组;所述显示面板包括呈阵列排布的像素单元,每个像素单元包括至少一个子像素,子像素包括像素电极、公共电极以及设置在像素电极与公共电极之间的液晶层;此外,液晶显示面板还包括多个薄膜晶体管,每个薄膜晶体管的栅极与栅线连接,每个薄膜晶体管的源极与数据线连接,每个薄膜晶体管的漏极与子像素的像素电极连接。
具体地,为了实现所述显示装置显示的更高对比度,所述背光模组具有局部背光调节功能,该功能可实现背光的分区显示,当画面中需要显示暗态时,调整背光,使其亮度变低甚至不发光。其中,所述背光模组包括多个背光单元和背光驱动芯片,所述背光驱动芯片控制所述背光单元发光。优选地,所述背光单元为Mini-LED(迷你发光二极管)背光单元,所述迷你发光二极管单元可拥有更多分区点亮,会将所述显示装置的显示画面的对比效果变得更为细腻,更进一步提高画面对比度。
进一步地,所述Mini-LED背光单元的常用驱动方式为PWM(脉冲宽度调制)模式和PAM(脉冲振幅调制)模式,在这两种驱动模式下,背光亮度都可以即时调节,且所述Mini-LED背光单元本身相较于液晶有更高的响应速度,因此所述背光模组可以实现高于液晶面板近40倍的刷新率。在一种优选实施例中,所述显示面板的显示频率可以为48Hz至165Hz,所述背光模组的固定频率为1920Hz、2400Hz以及3840Hz中的任意一种。
在本申请实施例中,所述获取目标显示装置的目标显示频率和目标背光亮度值之前的步骤还包括:
首先,使用伽马电压校正装置在每一个不同显示频率下,对目标显示装置每一个灰阶画面的实际亮度值进行校正,使得每一个灰阶画面的实际亮度值满足Gamma值为2.2时的亮度值,从而获取目标显示装置在不同显示频率下的伽马电压数据、多个场消隐时长以及每个所述场消隐时长对应的刷新率,其中,所述伽马电压数据包括互不相等的第一刷新率和第二刷新率分别对应的伽马电压。
具体地,所述伽马电压数据包括互不相等的第一刷新率和第二刷新率分别对应的伽马电压。具体地,第一刷新率优选为显示面板的最高刷新率,第二刷新率优选为显示面板的最低刷新率,每一刷新率对应的伽马电压包括与显示面板的多个灰阶一一对应的多个子伽马电压。
将显示面板从开始显示一帧图像到开始显示下一帧图像之间的时间段称为一个帧周期,一个帧周期包括显示阶段和场消隐阶段。预先在伽马电压校正装置中存储多个场消隐阶段的时长(也即场消隐时长)和每个场消隐时长对应的刷新率。需要说明的是,预先存储的场消隐时长的个数可根据实际情况自行设置,若预先存储的场消隐时长的个数越多,则预先存储的刷新率也越多。
例如,假定所述显示面板的可变刷新率区间为48-165Hz,灰阶区间为0-255灰阶,第一刷新率为165Hz,第二刷新率为48Hz。第一刷新率165Hz对应的伽马电压包括:灰阶0对应的子伽马电压a0,灰阶1对应的子伽马电压a1、…、灰阶255对应的子伽马电压a255。第二刷新率48Hz对应的伽马电压包括:灰阶0对应的子伽马电压b0,灰阶1对应的子伽马电压b1、…、灰阶255对应的子伽马电压b255。假定预先存储的多个场消隐时长分别为1、2、4、7、9、12、20、30和45,预先存储的多个场消隐时长一一对应的多个刷新率分别为165Hz、110Hz、100Hz、90Hz、80Hz、70Hz、60Hz和48Hz。
其次,输入使能信号至所述显示装置的时序控制器,所述使能信号包括垂直消隐周期。具体地,所述时序控制器接收外部源输入的图像数据,并根据图像数据解析出第一数据使能信号,所述第一数据使能信号示出了显示面板的多个帧周期,在显示面板的当前帧周期中,所述伽马电压校正装置将当前帧周期中的显示阶段的结束时刻作为起始时刻,实时获取当前时刻与起始时刻之间的时间差值,并将其作为实时获取的当前帧周期中的场消隐阶段的持续时长。
在本申请实施例中,所述使能信号为数据使能信号,数据使能信号被定义为包括每帧视频的垂直有效显示行数和垂直消隐周期,垂直有效显示行数代表一帧画面中有效显示区中的像素行数,垂直消隐周期代表各个像素行的充电时间总和。
进一步地,垂直有效显示行数被定义为包括每像素行的水平有效显示像素数和水平消隐周期,水平有效显示像素数表每个像素行中的像素个数,水平消隐周期代表对应像素行的充电时间。
其中,垂直有效显示行数与垂直消隐周期之和、水平有效显示像素数与水平消隐周期之和两者的乘积是相对固定的,仅与画面显示的帧频和像素时钟频率有关;而垂直有效显示行数和水平有效显示像素数与分辨率有关,因此,垂直消隐周期和水平消隐周期是相对变化的,当垂直消隐周期增加时,水平消隐周期会相对减小;反之亦然。
进一步地,垂直消隐周期和水平消隐周期可以采用时钟数表示其值,时钟数可以为像素时钟的数量。
之后,获取所述目标显示装置的刷新模式。具体地,在显示面板的当前帧周期中,伽马电压校正装置实时获取当前显示帧周期中的场消隐阶段的第一持续时长以及下一个显示帧周期中的场消隐阶段的第二持续时长。
其中,若所述第二持续时长与所述第一持续时长相等,则所述垂直消隐周期被配置为一固定垂直消隐周期,此时所述目标显示装置的刷新模式为固定显示频率;若所述第二持续时长与所述第一持续时长不相等,则所述垂直消隐周期被配置为一可变垂直消隐周期,此时所述目标显示装置的刷新模式为可变显示频率。
当所述目标显示装置的刷新模式为固定显示频率模式时,此时所述固定显示频率被设定为目标显示装置的目标显示频率,所述固定显示频率对应的背光亮度值被设定为所述目标显示装置的目标背光亮度值。
当所述目标显示装置的刷新模式为可变显示频率模式时,则获取所述目标显示装置在历史周期中不同显示频率的使用时长占比;其中,所述历史周期为所述显示面板在特定场景模式下切换不同显示频率的总时长。
具体地,获取所述目标显示装置的第二显示频率,所述第二显示频率的频率使用时长占比大于或等于第一阈值;此时将所述第二显示频率设定为所述目标显示装置的目标显示频率,以及所述第二显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值;此时,所述第二显示频率为用户使用所述显示面板的最常用的使用频率。
进一步地,获取所述目标显示装置的第三显示频率,所述第三显示频率的频率使用时长占比小于第一阈值;此时,由于所述第三显示频率不是用户使用所述显示面板的最常用的使用频率,因此,不宜将所述第三显示频率设定为所述目标显示装置的目标显示频率。
更进一步地,获取所述目标显示装置的第四显示频率,所述第四显示频率的时长占比大于或等于第一阈值;将所述第四显示频率设定为所述目标显示装置的目标显示频率,以及所述第四显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值。此时,由于所述第四显示频率为用户使用所述显示面板的最常用的使用频率。因此,设置用户使用所述显示面板的最常用的第四显示频率为所述目标显示装置的目标显示频率。更进一步地,由于60Hz、75Hz、120Hz、144Hz以及165Hz都是液晶显示面板的常用刷新率,所述目标显示频率可以为60Hz、75Hz、120Hz、144Hz以及165Hz中的任意一种。
S20,获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值。
具体地,所述S20还包括:
获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值。其中,所述预设周期为至少一个显示帧画面的时长周期。具体地,在当前显示帧获取所述目标显示装置的目标显示频率和目标背光亮度值后;之后,经过一个所述预设周期后,获取所述目标显示装置的第一显示频率和第一背光亮度值。
在本申请实施例中,所述预设周期为用户在初始应用场景与目标应用场景之间使用所述目标显示装置时对应的时长;其中,所述初始应用场景下,所述目标显示装置的显示频率为所述目标显示频率,所述目标显示装置的背光亮度值为目标背光亮度值。
进一步地,所述预设周期包括至少一个显示帧时长。S30,当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值;
具体地,所述S30还包括:
首先,当所述第一显示频率和所述目标显示频率相同时,此时不需要对所述第一显示频率的背光亮度进行补偿。当所述第一显示频率和所述目标显示频率相异时,则需要对所述第一显示频率的背光亮度进行补偿。
其次,当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值。
具体地,当所述第一显示频率和所述目标显示频率相异时,获取所述目标显示频率和所述第一显示频率的差值。
在本申请实施例的一种方法步骤中,所述差值大于0,即所述目标显示频率大于所述第一显示频率。此时,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤包括:
首先,获取所述显示装置的背光单元对应所述目标显示频率阶段时在一显示帧画面的第一刷新时长,以及对应所述第一显示频率阶段时在一显示帧画面的第二刷新时长;其中,由于所述显示装置的显示频率不固定而背光刷新频率固定,因此,所述第二刷新时长与所述第一刷新时长不等。
之后,获取所述背光单元的第三刷新时长,所述第三刷新时长为所述第二刷新时长与所述第一刷新时长的差值。
具体地,所述第一刷新时长为所述显示装置在所述目标显示频率时,对应的所述背光单元在一个显示帧周期内刷新总次数n1所需的时长,n1为正整数;所述第二刷新时长为所述显示装置在所述第一显示频率时,对应的所述背光单元在一个显示帧周期内刷新的总次数n2所需的时长,n2为正整数且大于n1;所述第三刷新时长为所述显示装置在所述第一显示频率时,对应的所述背光单元在一个显示帧周期内刷新(n2-n1)次时所需的时长。
最后,在所述背光单元对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。
具体地,在所述背光驱动芯片对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,包括:
首先,在所述预设周期内且所述显示装置的显示频率为所述第一显示频率时,确定所述背光驱动芯片在对应所述第三刷新时长的时间段内驱动背光单元刷新一次所需要的时长t以及刷新次数N;其中,t大于0,N为正整数。
具体地,所述背光驱动芯片在对应所述第三刷新时长的时间段内驱动背光单元刷新一次所需要的时长t为所述背光驱动芯片在对应的所述第一显示频率下驱动所述背光单元刷新一次所需要的时长;所述背光驱动芯片在对应所述第三刷新时长的时间段内驱动所述背光单元刷新的次数N为n2-n1。
之后,当所述背光单元在对应所述第三刷新时长的时间段内第n次刷新时,所述背光驱动芯片开始对所述背光单元的亮度进行补偿,以确定所述目标显示装置在所述预设周期的背光亮度补偿值,其中,n小于或等于N且为正整数。
具体地,当所述背光单元在对应所述第三刷新时长的时间段内第n次刷新时,所述背光驱动芯片以所述背光单元在对应所述第三刷新时长的时间段内开始第n次刷新的时刻为起始时刻,以所述背光单元在对应所述第三刷新时长的时间段内开始第N次刷新的时刻为结束时刻。所述预设周期为所述结束时刻与所述起始时刻的时间段。在所述预设周期内,所述背光驱动芯片开始对所述背光单元在至少刷新一次时的亮度值进行补偿。其中,所述背光驱动芯片可以仅仅只补偿所述背光单元刷新一次时的亮度值,所述背光驱动芯片也可以对所述背光单元在每刷新一次时的亮度值进行补偿。
进一步地,所述背光驱动芯片在所述预设周期内,对所述背光单元补偿的背光亮度补偿值的总和相等。优选地,所述背光驱动芯片对所述背光单元在每刷新一次的时长t内的亮度补偿值相同。
在本申请实施例的另一种方法步骤中,所述差值小于0,即所述目标显示频率小于所述第一显示频率。此时,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤包括:
首先,获取所述显示装置的背光单元对应所述目标显示频率阶段时在一显示帧画面的第一刷新时长,以及对应所述第一显示频率阶段时在一显示帧画面的第二刷新时长。此时,所述第二刷新时长小于所述第一刷新时长。
之后,在所述背光单元对应所述第二刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。该步骤与“在所述背光单元对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值”的步骤一致,在此不再赘叙。
S40,根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿。
具体地,所述S40还包括:
当所述目标显示频率大于所述第一显示频率时,所述背光亮度补偿值是正值,所述背光驱动芯片驱动所述背光单元增加所述第一背光亮度值的亮度,使得补偿后的所述第一背光亮度值与所述目标亮度值相等。
当所述目标显示频率小于所述第一显示频率时,所述背光亮度补偿值是负值,所述背光驱动芯片驱动所述背光单元降低所述第一背光亮度值的亮度,使得补偿后的所述第一背光亮度值与所述目标亮度值相等。
如图2所示,为本申请实施例提供的显示装置的显示方法中的一种亮度补偿方法的示意图;其中,所述目标显示频率设定为120Hz,所述第一显示频率设定为60Hz,所述背光单元的固定刷新频率设定为2400Hz。
当所述显示装置的时序控制芯片(Timer Control Register,TCON)或者系统级芯片(System-on-a-Chip,SOC)向所述背光模组的现场可编程门阵列芯片(Field Programmable Gate Array,FPGA)写入场同步信号(Vertical Synchronization,VSync)时,所述场同步信号在当前显示帧的显示频率为120Hz,在下一个显示帧的显示频率60Hz。
同时,所述背光模组的现场可编程门阵列芯片发出的背光控制信号写入所述背光驱动芯片后,所述背光驱动芯片调节所述背光单元发光。其中,所述背光单元在显示频率为120Hz下的画面中刷新20次,在显示频率为60Hz下的画面中刷新40次。
具体地,所述背光驱动芯片可以对自己的刷新次数进行计数,每次刷新计数在STV信号(画面帧开始信号)出现之后。当所述显示频率为120Hz时,所述显示面板的一显示帧的时长最短,此时所述背光单元的刷新次数最低。
由于在理想状态下,所述背光单元在显示频率为60Hz时前20次刷新时长的背光亮度与所述背光单元在显示频率为120Hz时前20次刷新时长的背光亮度相同。
因此,只需对所述背光单元在显示频率为60Hz时后20次刷新时长的背光亮度进行增加,就可以有效补偿所述显示装置由高显示频率切换至低显示频率时因所述显示面板漏电造成的亮度降低的现象。
本申请实施例通过提供一种显示装置的显示方法;该显示方法包括:首先获取目标显示装置的目标显示频率和目标背光亮度值,其次获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值,之后当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值,最后根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿;上述显示方法首先根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值,之后根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿,从而通过控制所述显示装置的背光源亮度,补偿所述显示装置在可变刷新频率模式下切换频率造成的亮度变化,可以有效降低所述显示装置在可变刷新频率模式下切换频率过程中产生的闪烁现象,进一步提升所述显示装置的显示效果。
相应的,如图3所示,为本申请实施例的一种显示装置的结构框图。其中,本申请实施例提供一种显示装置100,所述显示装置100包括:
第一获取模块101,用于获取目标显示装置的目标显示频率和目标背光亮度值;
第二获取模块102,用于获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值;
处理模块103,用于当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值;以及
补偿模块104,用于根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿。
在一种实施例中,所述第一获取模块101还用于输入使能信号至所述显示装置的时序控制器,所述使能信号包括垂直消隐周期;
获取所述目标显示装置的刷新模式;
其中,当所述目标显示装置的刷新模式为固定显示频率时,所述垂直消隐周期被配置为一固定垂直消隐周期;当所述目标显示装置的刷新模式为可变显示频率时,所述垂直消隐周期被配置为一可变垂直消隐周期。
在一种实施例中,所述第一获取模块101还用于获取所述目标显示装置在历史周期中不同显示频率的使用时长占比;
当不同显示频率中的第二显示频率的时长占比大于或等于第一阈值时,将所述第二显示频率设定为所述目标显示装置的目标显示频率,以及所述第二显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值。
在一种实施例中,所述第一获取模块101还用于当不同显示频率中的第二显示频率的时长占比小于所述第一阈值时,获取所述目标显示装置的第三显示频率,所述第三显示频率的时长占比大于或等于第一阈值;
将所述第三显示频率设定为所述目标显示装置的目标显示频率,以及所述第三显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值。
在一种实施例中,所述处理模块103还用于当所述第一显示频率和所述目标显示频率相异时,获取所述目标显示频率和所述第一显示频率的差值;
其中,当所述差值大于0时,获取所述显示装置的背光单元对应所述目标显示频率阶段时在一显示帧画面的第一刷新时长,以及对应所述第一显示频率阶段时在一显示帧画面的第二刷新时长;
获取所述背光单元的第三刷新时长,所述第三刷新时长为所述第二刷新时长与所述第一刷新时长的差值;
在所述背光单元对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。
进一步地,当所述目标显示频率大于所述第一显示频率时,所述处理模块还用于在所述预设周期内,确定所述显示装置的背光驱动芯片在对应所述第三刷新时长的时间段内所述背光单元刷新一次所需要的时长t以及刷新次数N,其中,t大于0,N为正整数;
当所述背光单元在对应所述第三刷新时长的时间段内第n次刷新时,所述背光驱动芯片开对所述背光单元的亮度进行补偿,以确定所述目标显示装置在所述预设周期的背光亮度补偿值,其中,n小于或等于N且为正整数。
进一步地,所述背光驱动芯片对所述背光单元在每刷新一次的时长t内的亮度补偿值相同。
在另外一种实施例中,所述处理模块103还用于当所述差值小于0时,获取所述显示装置的背光单元对应所述目标显示频率阶段时在一显示帧画面的第一刷新时长,以及对应所述第一显示频率阶段时在一显示帧画面的第二刷新时长;
在所述背光单元对应所述第二刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。
在一种实施例中,所述补偿模块104的所述第一背光亮度值进行补偿后的亮度值与所述目标背光亮度值相等。
本申请实施例提供一种显示装置及其显示方法;该显示方法包括:首先获取目标显示装置的目标显示频率和目标背光亮度值,其次获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值,之后当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值,最后根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿;上述显示方法首先根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值,之后根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿,从而通过控制所述显示装置的背光源亮度,补偿所述显示装置在可变刷新频率模式下切换频率造成的亮度变化,可以有效降低所述显示装置在可变刷新频率模式下切换频率过程中产生的闪烁现象,进一步提升所述显示装置的显示效果。
以上对本申请实施例所提供的一种显示装置及其显示方法进行了详细介绍,本文中应用了具体个例对本申请的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本申请的方法及其核心思想;同时,对于本领域的技术人员,依据本申请的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种显示装置的显示方法,其中,包括:
    获取目标显示装置的目标显示频率和目标背光亮度值;
    获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值;
    当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值;
    根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿;
    其中,在所述获取目标显示装置的目标显示频率和目标背光亮度值的步骤之前,还包括:
    输入使能信号至所述显示装置的时序控制器,所述使能信号包括垂直消隐周期;
    获取所述目标显示装置的刷新模式;
    其中,当所述目标显示装置的刷新模式为固定显示频率时,所述垂直消隐周期被配置为一固定垂直消隐周期;当所述目标显示装置的刷新模式为可变显示频率时,所述垂直消隐周期被配置为一可变垂直消隐周期。
  2. 根据权利要求1所述的显示装置的显示方法,其中,所述获取目标显示装置的目标显示频率和目标背光亮度值的步骤,包括:
    获取所述目标显示装置在历史周期中不同显示频率的使用时长占比;
    获取所述目标显示装置的第二显示频率,所述第二显示频率的频率使用时长占比大于或等于第一阈值;
    将所述第二显示频率设定为所述目标显示装置的目标显示频率,以及所述第二显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值。
  3. 根据权利要求1所述的显示装置的显示方法,其中,所述获取目标显示装置的目标显示频率和目标背光亮度值的步骤,还包括:
    获取所述目标显示装置在历史周期中不同显示频率的使用时长占比;
    获取所述目标显示装置的第三显示频率,所述第三显示频率的频率使用时长占比小于第一阈值;
    获取所述目标显示装置的第四显示频率,所述第四显示频率的时长占比大于或等于第一阈值;
    将所述第四显示频率设定为所述目标显示装置的目标显示频率,以及所述第四显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值。
  4. 根据权利要求1所述的显示装置的显示方法,其中,所述当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,包括:
    当所述第一显示频率和所述目标显示频率相异时,获取所述目标显示频率和所述第一显示频率的差值;
    获取所述显示装置的背光单元对应所述目标显示频率阶段时在一显示帧画面的第一刷新时长,以及对应所述第一显示频率阶段时在一显示帧画面的第二刷新时长;
    当所述差值大于0时,获取所述背光单元的第三刷新时长,所述第三刷新时长为所述第二刷新时长与所述第一刷新时长的差值;
    在所述背光单元对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。
  5. 根据权利要求4所述的显示装置的显示方法,其中,当所述目标显示频率大于所述第一显示频率时,在所述背光单元对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,包括:
    在所述预设周期内,确定所述显示装置的背光驱动芯片在对应所述第三刷新时长的时间段内所述背光单元刷新一次所需要的时长t以及刷新次数N,其中,t大于0,N为正整数;
    当所述背光单元在对应所述第三刷新时长的时间段内第n次刷新时,所述背光驱动芯片开始对所述背光单元的亮度进行补偿,以确定所述目标显示装置在所述预设周期的背光亮度补偿值,其中,n小于或等于N且为正整数。
  6. 根据权利要求5所述的显示装置的显示方法,其中,所述当所述背光单元在对应所述第三刷新时长的时间段内第n次刷新时,所述背光驱动芯片对所述背光单元的亮度进行补偿的步骤中,所述背光驱动芯片对所述背光单元在每刷新一次的时长t内的亮度补偿值相同。
  7. 根据权利要求4所述的显示装置的显示方法,其中,所述当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,还包括:
    当所述差值小于0时,在所述背光单元对应所述第二刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。
  8. 根据权利要求1所述的显示装置的显示方法,其中,根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿的步骤中,所述第一背光亮度值进行补偿后的亮度值与所述目标背光亮度值相等。
  9. 一种显示装置的显示方法,其中,包括:
    获取目标显示装置的目标显示频率和目标背光亮度值;
    获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值;
    当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值;
    根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿。
  10. 根据权利要求9所述的显示装置的显示方法,其中,所述获取目标显示装置的目标显示频率和目标背光亮度值的步骤,包括:
    获取所述目标显示装置在历史周期中不同显示频率的使用时长占比;
    获取所述目标显示装置的第二显示频率,所述第二显示频率的频率使用时长占比大于或等于第一阈值;
    将所述第二显示频率设定为所述目标显示装置的目标显示频率,以及所述第二显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值。
  11. 根据权利要求9所述的显示装置的显示方法,其中,所述获取目标显示装置的目标显示频率和目标背光亮度值的步骤,还包括:
    获取所述目标显示装置在历史周期中不同显示频率的使用时长占比;
    获取所述目标显示装置的第三显示频率,所述第三显示频率的频率使用时长占比小于第一阈值;
    获取所述目标显示装置的第四显示频率,所述第四显示频率的时长占比大于或等于第一阈值;
    将所述第四显示频率设定为所述目标显示装置的目标显示频率,以及所述第四显示频率对应的背光亮度值设定为所述目标显示装置的目标背光亮度值。
  12. 根据权利要求9所述的显示装置的显示方法,其中,所述当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,包括:
    当所述第一显示频率和所述目标显示频率相异时,获取所述目标显示频率和所述第一显示频率的差值;
    获取所述显示装置的背光单元对应所述目标显示频率阶段时在一显示帧画面的第一刷新时长,以及对应所述第一显示频率阶段时在一显示帧画面的第二刷新时长;
    当所述差值大于0时,获取所述背光单元的第三刷新时长,所述第三刷新时长为所述第二刷新时长与所述第一刷新时长的差值;
    在所述背光单元对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。
  13. 根据权利要求12所述的显示装置的显示方法,其中,当所述目标显示频率大于所述第一显示频率时,在所述背光单元对应所述第三刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,包括:
    在所述预设周期内,确定所述显示装置的背光驱动芯片在对应所述第三刷新时长的时间段内所述背光单元刷新一次所需要的时长t以及刷新次数N,其中,t大于0,N为正整数;
    当所述背光单元在对应所述第三刷新时长的时间段内第n次刷新时,所述背光驱动芯片开始对所述背光单元的亮度进行补偿,以确定所述目标显示装置在所述预设周期的背光亮度补偿值,其中,n小于或等于N且为正整数。
  14. 根据权利要求13所述的显示装置的显示方法,其中,所述当所述背光单元在对应所述第三刷新时长的时间段内第n次刷新时,所述背光驱动芯片对所述背光单元的亮度进行补偿的步骤中,所述背光驱动芯片对所述背光单元在每刷新一次的时长t内的亮度补偿值相同。
  15. 根据权利要求12所述的显示装置的显示方法,其中,所述当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值的步骤,还包括:
    当所述差值小于0时,在所述背光单元对应所述第二刷新时长的时间段内,确定所述目标显示装置在预设周期的背光亮度补偿值。
  16. 根据权利要求9所述的显示装置的显示方法,其中,根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿的步骤中,所述第一背光亮度值进行补偿后的亮度值与所述目标背光亮度值相等。
  17. 一种显示装置,其中,包括:
    第一获取模块,用于获取目标显示装置的目标显示频率和目标背光亮度值;
    第二获取模块,用于获取所述目标显示装置在预设周期的第一显示频率和第一背光亮度值;
    处理模块,用于当所述第一显示频率和所述目标显示频率相异时,根据所述目标显示频率和所述第一显示频率的差值,确定所述目标显示装置在预设周期的背光亮度补偿值;以及
    补偿模块,用于根据所述背光亮度补偿值,对所述第一背光亮度值进行补偿。
  18. 根据权利要求17所述的显示装置,其中,所述第一获取模块还用于获取所述目标显示装置的刷新模式;
    其中,当所述目标显示装置的刷新模式为固定显示频率时,所述目标显示装置的垂直消隐周期被配置为一固定垂直消隐周期;当所述目标显示装置的刷新模式为可变显示频率时,所述垂直消隐周期被配置为一可变垂直消隐周期。
  19. 根据权利要求17所述的显示装置,其中,所述处理模块还用于当所述第一显示频率和所述目标显示频率相异时,获取所述目标显示频率和所述第一显示频率的差值,并获取所述显示装置的背光单元对应所述目标显示频率阶段时在一显示帧画面的第一刷新时长,以及对应所述第一显示频率阶段时在一显示帧画面的第二刷新时长;
    其中,当所述差值大于0时,所述处理模块还用于获取所述背光单元的第三刷新时长,所述第三刷新时长为所述第二刷新时长与所述第一刷新时长的差值。
  20. 根据权利要求17所述的显示装置,其中,所述补偿模块用于将所述第一背光亮度值进行补偿后的亮度值调整至所述目标背光亮度值。
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