WO2021238361A1 - 显示设备以及显示控制方法 - Google Patents

显示设备以及显示控制方法 Download PDF

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Publication number
WO2021238361A1
WO2021238361A1 PCT/CN2021/081883 CN2021081883W WO2021238361A1 WO 2021238361 A1 WO2021238361 A1 WO 2021238361A1 CN 2021081883 W CN2021081883 W CN 2021081883W WO 2021238361 A1 WO2021238361 A1 WO 2021238361A1
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WIPO (PCT)
Prior art keywords
refresh rate
control signal
display
adjustment coefficient
backlight
Prior art date
Application number
PCT/CN2021/081883
Other languages
English (en)
French (fr)
Inventor
孙学斌
高洁
杨洋
Original Assignee
海信视像科技股份有限公司
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.)
Filing date
Publication date
Priority claimed from CN202010455268.XA external-priority patent/CN113724656A/zh
Priority claimed from CN202010483467.1A external-priority patent/CN113763904A/zh
Priority claimed from CN202010483455.9A external-priority patent/CN113763903A/zh
Priority claimed from CN202010483707.8A external-priority patent/CN113763905A/zh
Priority claimed from CN202010492953.XA external-priority patent/CN113766315A/zh
Priority claimed from CN202010493104.6A external-priority patent/CN113766316A/zh
Application filed by 海信视像科技股份有限公司 filed Critical 海信视像科技股份有限公司
Publication of WO2021238361A1 publication Critical patent/WO2021238361A1/zh
Priority to US17/808,041 priority Critical patent/US11830446B2/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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • 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
    • G09G2320/0613—The adjustment depending on the type of the information to be displayed
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • 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
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements

Definitions

  • the application name is “display devices and display control methods”; on May 2020
  • the Chinese Patent Office filed on June 26, the application number is 202010455268.X, the application name is "Screen backlight frequency adjustment method, device, equipment and storage medium”; the China Patent Office filed on June 3, 2020, the application number is Chinese
  • the priority of the patent application the entire content of which is incorporated in this application by reference.
  • This application relates to the technical field of display devices, and specifically to a display device and a display control method.
  • the display device needs to set a variable refresh rate (Variable Refresh Rate, VRR) to match the frame rate of the GPU Changes to make the content displayed by the display device smoother.
  • VRR Variable Refresh Rate
  • the change of the refresh rate of the display screen will cause the display brightness of the display screen to change, resulting in flickering and dimming during the display process, which affects the user experience.
  • the present application provides a display device including: a main board, a power supply board, and a display screen; the main board is connected to the power supply board and the display screen respectively, and the power supply board is connected to the display screen ,
  • the motherboard is configured to: obtain a refresh rate corresponding to the video data to be displayed, and generate a backlight control signal according to the refresh rate, wherein the duty cycle of the backlight control signal corresponding to different refresh rates is different; the power supply The board is configured to receive the backlight control signal, and drive the backlight light source of the display screen according to the backlight control signal.
  • the motherboard includes a refresh rate monitoring unit and a backlight adjustment unit; the refresh rate monitoring unit is configured to: obtain a refresh rate corresponding to the video data; and the backlight adjustment unit is configured to: The refresh rate generates the backlight control signal.
  • the backlight adjustment unit includes: an adjustment coefficient determination subunit and a signal adjustment subunit; the adjustment coefficient determination subunit is configured to: determine an adjustment coefficient according to the refresh rate; the signal adjustment subunit The unit is configured to: adjust the duty cycle of the default backlight control signal according to the adjustment coefficient, and generate a backlight control signal corresponding to the refresh rate according to the adjusted duty cycle; the default backlight control signal It is a control signal preset for the default refresh rate.
  • the adjustment coefficient determining subunit is specifically configured as:
  • tr is the response time of the display screen
  • A is the preset coefficient
  • the adjustment coefficient determining subunit is specifically configured to determine the adjustment coefficient according to the refresh rate and the correspondence relationship between the preset refresh rate and the adjustment coefficient.
  • the refresh rate monitoring unit is specifically configured to determine the refresh rate according to a field synchronization signal corresponding to each video frame in the video data to be displayed.
  • the present application also provides a display control method, including: obtaining a refresh rate corresponding to the video data to be displayed; generating a backlight control signal according to the refresh rate; wherein, backlight control corresponding to different refresh rates The duty cycle of the signal is different, and the backlight control signal is used to drive the backlight light source of the display screen.
  • the generating the backlight control signal according to the refresh rate includes: determining an adjustment coefficient according to the refresh rate; adjusting the duty cycle of the default backlight control signal according to the adjustment coefficient, And according to the adjusted duty ratio, a backlight control signal corresponding to the refresh rate is generated; the default backlight control signal is a control signal preset for the default refresh rate.
  • the determining the adjustment coefficient according to the refresh rate includes:
  • tr is the response time of the display screen
  • A is the preset coefficient
  • the generating a backlight control signal according to the refresh rate includes: determining the adjustment coefficient according to the refresh rate and a correspondence relationship between a preset refresh rate and an adjustment coefficient.
  • the embodiment of the present application also provides a display device, including a main board, a screen drive board, and a display screen; the screen drive board is connected between the main board and the display screen; the main board is configured to: The refresh rate corresponding to the video data; determine the pixel adjustment coefficient according to the refresh rate; perform pixel processing on each frame of video data corresponding to the refresh rate according to the pixel adjustment coefficient; output the processed video data to the screen
  • the driver board enables the screen driver board to drive the display screen to display the video data.
  • the motherboard includes: a refresh rate monitoring unit configured to obtain a refresh rate corresponding to the video data to be displayed; an adjustment coefficient determination unit configured to determine a pixel adjustment coefficient according to the refresh rate; image processing The unit is configured to perform pixel processing on each frame of video data corresponding to the refresh rate according to the pixel adjustment coefficient; the video output unit is configured to output the processed video data to the screen driver board so that all The screen drive board drives the display screen to display the video data.
  • the adjustment coefficient determining unit is specifically configured to:
  • the highest light transmittance H corresponding to the refresh rate F is calculated; the ratio of the highest light transmittance H to the highest light transmittance H 0 corresponding to the default refresh rate is used as the pixel adjustment coefficient K;
  • I the average light transmittance corresponding to the default refresh rate
  • tr is the response time of the display screen.
  • the adjustment coefficient determining unit is specifically configured to determine the pixel adjustment coefficient according to the refresh rate and the corresponding relationship between the preset refresh rate and the pixel adjustment coefficient.
  • the image processing unit is specifically configured to: multiply the pixel value of each pixel in each frame of video data corresponding to the refresh rate by the pixel adjustment coefficient.
  • the refresh rate monitoring unit is specifically configured to determine the refresh rate according to a field synchronization signal corresponding to each video frame in the video data to be displayed.
  • An embodiment of the present application also provides a display control method, including: obtaining a refresh rate corresponding to the video data to be displayed; determining a pixel adjustment coefficient according to the refresh rate; Each frame of video data is pixel processed; the processed video data is output to the screen driver board, so that the screen driver board drives the display screen to display the video data.
  • the determining the pixel adjustment coefficient according to the refresh rate includes:
  • the ratio of the highest light transmittance H to the highest light transmittance H 0 corresponding to the default refresh rate is used as the pixel adjustment coefficient K; wherein, Is the average light transmittance corresponding to the default refresh rate, and tr is the response time of the display screen.
  • the determining the pixel adjustment coefficient according to the refresh rate includes: determining the pixel adjustment coefficient according to the refresh rate and the correspondence relationship between the preset refresh rate and the pixel adjustment coefficient.
  • the performing pixel processing on each frame of video data corresponding to the refresh rate according to the pixel adjustment coefficient includes: converting the pixels of each pixel in each frame of video data corresponding to the refresh rate The value is multiplied by the pixel adjustment coefficient.
  • the embodiment of the present application also provides a display device, including: a main board, a screen drive board, and a display screen; the screen drive board is connected between the main board and the display screen; the main board is used to: The refresh rate corresponding to the video data; a group of gamma voltages is determined according to the refresh rate, and the group of gamma voltages are sent to the screen driver board, wherein the group of gamma voltages is used to make the
  • the screen driving board maps the received display signal to obtain a screen driving signal that drives the display screen to display the video data.
  • the motherboard includes: a refresh rate monitoring unit configured to: obtain a refresh rate corresponding to the video data; a gamma voltage processing unit configured to: determine the set of refresh rates according to the refresh rate And send the group of gamma voltages to the screen driving board.
  • the gamma voltage processing unit includes: a gamma voltage coefficient confirmation subunit, configured to: calculate an adjustment coefficient of the gamma voltage according to the refresh rate; the gamma voltage adjustment subunit is configured In order to: adjust a set of default gamma voltages according to the adjustment coefficient to obtain the set of gamma voltages; the set of default gamma voltages is a set of gamma voltages preset for a default refresh rate.
  • the gamma voltage coefficient confirmation subunit is specifically configured as:
  • I the average light transmittance corresponding to the default refresh rate
  • tr is the response time of the display screen.
  • the gamma voltage adjustment subunit is specifically configured to: perform a difference operation between each default gamma voltage and a reference voltage to obtain a difference; the reference voltage is the liquid crystal corresponding to the display device A reference voltage for molecular deflection; after the difference is multiplied by the adjustment coefficient, a sum operation is performed with the reference voltage to obtain the set of gamma voltages.
  • the gamma voltage processing unit is specifically configured to determine the set of gamma voltages according to the refresh rate and the correspondence relationship between the preset refresh rate and the gamma voltage.
  • the gamma voltage processing unit is specifically configured to determine the value of the set of gamma voltages according to the refresh rate and the corresponding relationship between the preset refresh rate and the offset of the gamma voltage. Offset; according to the offset of the set of gamma voltages and a set of default gamma voltages, the set of gamma voltages are calculated; the set of default gamma voltages are preset for the default refresh rate A set of gamma voltages.
  • the screen drive board is configured to: generate a gamma curve according to the set of gamma voltages; map the display signal according to the gamma curve to obtain the screen drive signal;
  • the screen driving signal drives the display screen to display the video data.
  • the refresh rate corresponds to the set of gamma voltages on a one-to-one basis.
  • An embodiment of the present application also provides a display control method, including: obtaining a refresh rate corresponding to the video data to be displayed; determining a set of gamma voltages according to the refresh rate, and sending the set of gamma voltages to the screen The driver board, wherein the set of gamma voltages is used to enable the screen driver board to map the received display signal to obtain a screen drive signal for driving the display screen to display the video data.
  • the display device and display control method provided by the embodiments of the present application obtain the refresh rate corresponding to the video data to be displayed in real time, and dynamically determine the display parameters according to the refresh rate.
  • the display parameters include but are not limited to gamma voltage, pixel adjustment coefficient, At least one of backlight brightness, etc., and then control the display screen to display the video data according to the display parameters, so as to adjust the brightness of the screen displayed on the display screen to stabilize the brightness of the display screen to avoid flickering and dimming of the displayed screen.
  • FIG. 1 is a schematic diagram of a display cycle of a liquid crystal display screen provided by an embodiment of the application
  • FIG. 2 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • FIG. 3 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • FIG. 4 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • FIG. 5 is a schematic diagram of a gamma curve provided by an embodiment of the application.
  • FIG. 6 is a schematic flowchart of a display control method provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of a relationship between display period and light transmittance provided by an embodiment of the application.
  • FIG. 8 is a schematic diagram of reducing Gamma voltage according to an embodiment of the application.
  • FIG. 9 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • FIG. 10 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • FIG. 11 is a schematic flowchart of a display control method provided by an embodiment of this application.
  • FIG. 12 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • FIG. 13 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • FIG. 14 is a schematic structural diagram of a display device provided by an embodiment of this application.
  • FIG. 15 is a schematic flowchart of a display control method provided by an embodiment of the application.
  • display devices can use Variable Refresh Rate (VRR) display protocols, such as Gsync, Freesync, etc., to set different refresh rates to adapt to the frame rate changes of the Graphics Processing Unit (GPU) To make the displayed content smoother.
  • the display device can be any terminal device with a display screen, such as a TV, a computer, a smart display, an all-in-one machine, a mobile phone, and a notebook.
  • the change in the refresh rate of the display device will cause the ratio of the turnover time of the liquid crystal molecules to change in the total display cycle time, which will cause the average light transmittance of the display to change per unit time, and then Causes changes in display brightness.
  • FIG. 1 is a schematic diagram of a display cycle of a liquid crystal display screen provided by an embodiment of the application.
  • the display process of the liquid crystal display is divided into two parts, one is the response process, and the other is the display process.
  • the horizontal axis is the time t axis
  • the vertical axis is the light transmittance h axis.
  • tr1 or tr2 is the response time corresponding to the response process, that is, the time required for the liquid crystal molecules to rotate to the specified state
  • ton is the display time corresponding to the display process, that is, the normal display time after the liquid crystal molecules rotate to the specified state.
  • Figure 1 shows the changes in the light transmittance of the liquid crystal display under two refresh rates.
  • the refresh rate a is less than the refresh rate b. Therefore, the display period of the liquid crystal display is smaller at the refresh rate b.
  • the response time of the liquid crystal molecules is basically the same, that is, tr1 is equal to tr2, so the display period under refresh rate b is less than the display period under refresh rate a, which will shorten the display time ton, that is, ton2 is less than ton1.
  • the display screen of the LCD screen will appear flickering and flickering.
  • the application of the embodiment of this application can determine different display parameters according to different refresh rates in the above-mentioned scenarios, and the display device displays according to different display parameters, so that the display screen maintains the stability of the display brightness and avoids the flickering and dimming of the display screen.
  • the display parameters include but are not limited to at least one of gamma voltage, pixel adjustment coefficient, backlight brightness, and the like.
  • the embodiment of the application obtains the refresh rate corresponding to the video data to be displayed in real time, and dynamically determines the display parameters according to the refresh rate, and then controls the display screen to display the display parameters according to the display parameters.
  • Video data to adjust the brightness of the screen displayed on the screen to stabilize.
  • this application proposes to dynamically adjust the gamma voltage to change the average light transmittance of the liquid crystal molecules, thereby realizing a variable refresh rate.
  • the specific solutions are as follows:
  • FIG. 2 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • the display device 001 includes a main board 100, a screen driver board 200 and a display screen 300.
  • the screen driving board 200 is connected between the main board 100 and the display screen 300.
  • the main board 100 is used to obtain the refresh rate corresponding to the video data to be displayed, determine a group of gamma voltages according to the refresh rate, and then send the group of gamma voltages to the screen driving board 200.
  • a group of gamma voltages is used to make the screen driving board 200 map the received display signal to obtain a screen driving signal for driving the display screen 300 to display video data.
  • the screen drive board 200 generates a screen drive signal according to a set of gamma voltages and the received display signal, and sends the screen drive signal to the display screen 300, so that the display screen 300 displays video data according to the screen drive signal.
  • FIG. 3 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • the motherboard 100 at least includes: a refresh rate monitoring unit 120 and a gamma voltage processing unit 130.
  • the refresh rate monitoring unit 120 obtains the field synchronization signal of the video data to be displayed, and each frame of video data corresponds to a field synchronization signal, and the field synchronization signal carries the refresh rate corresponding to the video frame. Rate.
  • the field synchronization signal is sent before the corresponding video frame.
  • the main board 100 further includes a video data acquisition unit 110, which is configured to acquire the video data to be displayed from the video data source 002, and perform processing such as decoding the video data.
  • the refresh rate monitoring unit 120 obtains the field synchronization signal of the video data to be displayed from the video data obtaining unit 110.
  • the video data source 002 may be a server, a storage medium, an image acquisition device, a high-definition multimedia interface (HDMI) channel, and the like.
  • HDMI high-definition multimedia interface
  • the video data source 002 first sends the video data to the GPU (not shown in the figure), so that the GPU renders the video data and generates the field synchronization signal at the same time, and the refresh rate monitoring unit 120 obtains the field synchronization from the GPU. Signal and rendered video data.
  • the GPU may be set on the graphics card or on the motherboard. In some embodiments, the graphics card may be independent of the motherboard or integrated on the motherboard.
  • the refresh rate monitoring unit 120 sends the acquired refresh rate to the gamma voltage processing unit 130, and the gamma voltage processing unit 130 determines a group of gamma voltages according to the refresh rate, and sends the group of gamma voltages to the screen driving board 200.
  • a set of gamma voltages includes multiple gamma voltages required by the screen driving board 200 to map the display signal. In some embodiments, the number of gamma voltages may be twelve.
  • FIG. 4 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • the gamma voltage processing unit 130 includes: a gamma voltage coefficient confirmation subunit 131 and a gamma voltage adjustment subunit 132.
  • the gamma voltage coefficient confirmation subunit 131 calculates the adjustment coefficient of the gamma voltage according to the refresh rate;
  • the gamma voltage adjustment subunit 132 adjusts a set of default gamma voltages according to the adjustment coefficient to obtain the set of gamma voltages;
  • the set of default gamma voltages is a set of gamma voltages preset for the default refresh rate.
  • the video data acquisition unit 110, the refresh rate monitoring unit 120, and the gamma voltage processing unit 130 may be provided in a System-on-a-Chip (SOC) of the motherboard.
  • the screen driving board 200 generates a gamma curve according to the received multiple gamma voltages, maps the received display signal according to the gamma curve to obtain a screen driving signal, and then drives the display screen 300 to display video data according to the screen driving signal.
  • the display signal is a signal that conforms to any image transmission protocol, such as a VByOne signal, a Low-Voltage Differential Signaling (LVDS) signal, and so on.
  • LVDS Low-Voltage Differential Signaling
  • FIG. 5 is a schematic diagram of a gamma curve provided by an embodiment of the application.
  • the gamma voltage processing unit 130 sends 12 gamma voltages V1 to V12 to the screen driving board 200, and the screen driving board 200 generates a gamma curve as shown in FIG. 5 according to the gamma voltages V1 to V12.
  • V6 is equal to V7, and is equal to the reference voltage Vcom for the deflection of liquid crystal molecules.
  • the screen driver board 200 maps the voltage value of the received display signal in the generated gamma curve to obtain the image data value corresponding to each display signal (the image data value is generally between 0 and 255), and According to the image data value, a screen driving signal is generated to drive the display screen 300 to display corresponding video data.
  • the difference in the gamma curve will cause the display signal to map different image data values.
  • the gamma voltage processing unit 130 should be made to output a larger gamma voltage. According to the gamma curve generated by the increased gamma voltage, the mapped image data value is lower, so the brightness is higher. . Conversely, enabling the gamma voltage processing unit 130 to output a smaller gamma voltage may reduce the display brightness of the display screen.
  • different refresh rates correspond to different sets of gamma voltages, that is, the refresh rate corresponds to a set of gamma voltages one-to-one; or, multiple refresh rates correspond to a set of gamma voltages, for example, multiple values are adjacent Refresh rate.
  • the display device 001 may also include a Gamma chip (Integrated Circuit Chip, IC) (not shown in the figure).
  • the Gamma IC can be set on the motherboard or on the screen driver board. This is not a requirement.
  • the Gamma IC and the gamma processing unit can be connected through the (Inter Integrated-Circuit, I 2 C) port, the Gamma IC and the screen driver board can be connected through multiple input and output I/O ports, and the Gamma IC can be connected through the I 2 C port.
  • the 2C bus receives a set of gamma voltage values sent by the gamma processing unit, and converts the voltage value of each gamma voltage into a voltage and sends it to the screen driving board 200 through a plurality of I/O ports.
  • the refresh rate monitoring unit 120 obtains the refresh rate corresponding to the video data to be displayed in real time, and the gamma voltage processing unit 130 adjusts the size of a group of gamma voltages in real time according to the refresh rate. Then, the screen driving board 200 generates a gamma curve according to a set of gamma voltages, and then changes the mapping result of the display signal in the gamma curve, so as to realize the adjustment of the display brightness and avoid the problem of the display screen flickering.
  • the embodiment of the present application also provides a display control method, which is applied to the display device 001 provided in any of the foregoing embodiments.
  • FIG. 6 is a schematic flowchart of a display control method provided by an embodiment of the application.
  • the method includes: S101: Obtain a refresh rate corresponding to the video data to be displayed. S102: Determine a group of gamma voltages according to the refresh rate.
  • the gamma voltage processing unit 130 determines a set of gamma voltages in real time according to the refresh rate.
  • the embodiment of the present application provides the following One possible way to achieve:
  • the adjustment coefficient of the gamma voltage is calculated according to the refresh rate, and multiple sets of default gamma voltages are adjusted according to the adjustment coefficient to obtain a set of gamma voltages.
  • a set of default gamma voltages is a set of gamma voltages preset for the default refresh rate.
  • the default refresh rate is a fixed refresh rate of the display device when the VRR is not set.
  • FIG. 7 is a schematic diagram of a relationship between display period and light transmittance provided by an embodiment of the application.
  • the average light transmittance under the refresh rate can be obtained by formula (2) Indicates that H is the highest light transmittance at the refresh rate obtained in real time.
  • the difference between each default gamma voltage and the reference voltage Vcom is calculated to obtain the difference, and then the difference is multiplied by the adjustment coefficient, and then the sum is calculated with the reference voltage Vcom, that is, the default gamma is calculated.
  • the voltage is enlarged or reduced to obtain the final set of gamma voltages.
  • FIG. 8 is a schematic diagram of reducing the Gamma voltage according to an embodiment of the application.
  • the adjustment coefficient K is less than 1
  • a set of default gamma voltages is reduced, for example, as shown in FIG. 8, it is reduced from a solid line to a position shown by a dotted line.
  • a set of gamma voltages is determined according to the refresh rate and the correspondence between the preset refresh rate and the gamma voltage.
  • the refresh rate is constantly changed, and each time the refresh rate is changed, a set of default gamma voltages are adjusted to make the display screen
  • the display brightness at this refresh rate is consistent with the display brightness at the default refresh rate, and then the adjusted group of gamma voltages is used as the gamma voltage corresponding to the refresh rate, and the corresponding to each different refresh rate is determined accordingly.
  • Gamma voltage since the gamma voltage corresponding to each refresh rate is predetermined, the calculation process is simplified, and the processing efficiency of the gamma voltage processing unit 130 is improved.
  • the offset of a group of gamma voltages is determined; and according to the offset of the set of gamma voltages and A set of default gamma voltages, a set of gamma voltages are calculated. It is necessary to obtain the offset of the gamma voltage at different refresh rates in advance through the test data.
  • the refresh rate is constantly changed, and each time the refresh rate is changed, a set of default gamma voltages are adjusted to make the display screen
  • the display brightness at this refresh rate is consistent with the display brightness at the default refresh rate, and then the offset adjusted when adjusting a set of default gamma voltages is used as the offset of a set of gamma voltages corresponding to the refresh rate.
  • a final set of gamma voltages can be obtained through calculation.
  • S103 Send a group of gamma voltages to the screen driving board.
  • this step a group of gamma voltages are sent to the screen driving board, so that the screen driving board drives the display screen to display video data according to a group of gamma voltages and the received display signal.
  • Obtain the refresh rate corresponding to the video data to be displayed in real time and adjust the size of a group of gamma voltages in real time according to the refresh rate, and then generate a gamma curve according to a group of gamma voltages, and then change the mapping of the display signal in the gamma curve
  • this application proposes a way to dynamically adjust the pixel value of the video data, amplify or compress the size of the pixel value, so as to achieve a variable refresh rate:
  • FIG. 9 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • the display device 003 includes a main board 400, a screen driver board 500 and a display screen 600.
  • the screen driver board 500 is connected between the main board 400 and the display screen 600.
  • the motherboard 400 is used to obtain the refresh rate corresponding to the video data to be displayed, determine the pixel adjustment coefficient according to the refresh rate, perform pixel processing on each frame of video data corresponding to the refresh rate according to the pixel adjustment coefficient, and then output the processed video data to Screen driver board.
  • the screen driver board 500 drives the display screen 600 to display the processed video data.
  • FIG. 10 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • the motherboard 400 includes at least: a refresh rate monitoring unit 420, an adjustment coefficient determination unit 430, an image processing unit 440, and a video output unit 450.
  • the main board 400 further includes a video data obtaining unit 410, which is configured to obtain the video data to be displayed from the video data source 002, and perform processing such as decoding the video data.
  • the video data source 002, the video data acquisition unit 410, and the refresh rate monitoring unit 420 are all consistent with the corresponding content in the foregoing embodiment, and will not be repeated here.
  • the refresh rate monitoring unit 420 sends the acquired refresh rate to the adjustment coefficient determination unit 430, and the adjustment coefficient determination unit 430 determines the pixel adjustment coefficient according to the refresh rate in real time, and sends the pixel adjustment coefficient matching the refresh rate to the image processing unit 440.
  • the image processing unit 440 receives the pixel adjustment coefficient sent by the adjustment coefficient determination unit 430, and acquires video data from the video data acquisition unit 410.
  • the image processing unit 440 performs pixel processing on each frame of video data corresponding to the acquired refresh rate according to the pixel adjustment coefficient. It should be understood that when the refresh rate is low, the display brightness is high, and the pixel value needs to be enlarged to reduce the display brightness; on the contrary, when the refresh rate is high, the display brightness is low, and the pixel value needs to be compressed. To increase the display brightness.
  • the video output unit 450 outputs the pixel-processed video data to the screen driving board 500, so that the screen driving board 500 generates a driving signal, and drives the display screen to display the video data through the driving signal.
  • the video data acquisition unit 410, the refresh rate monitoring unit 420, the adjustment coefficient determination unit 430, the image processing unit 440, and the video output unit 450 can all be set in the SOC of the motherboard.
  • the refresh rate monitoring unit 420 obtains the refresh rate corresponding to the video data to be displayed in real time, and the adjustment coefficient determining unit 430 determines the pixel adjustment coefficient according to the refresh rate, and then the image processing unit 440 Perform pixel processing on the video data to be displayed according to the pixel adjustment coefficient, enlarge or compress the size of the pixel value, realize the adjustment of the display brightness, and make the display brightness of the video data finally displayed on the display screen stable.
  • the embodiment of the present application also provides a display control method, which is applied to the display device 003 provided in any of the foregoing embodiments.
  • FIG. 11 is a schematic flowchart of a display control method provided by an embodiment of this application.
  • the method includes: S201: Obtain a refresh rate corresponding to the video data to be displayed. S202: Determine the pixel adjustment coefficient according to the refresh rate.
  • S201 Obtain a refresh rate corresponding to the video data to be displayed.
  • S202 Determine the pixel adjustment coefficient according to the refresh rate.
  • different pixel adjustment coefficients are determined for different refresh rates, so as to implement pixel processing on the pixels of each video frame, so that the finally displayed video data has a stable display brightness.
  • the following possible implementation methods are provided to determine the pixel adjustment coefficient.
  • the highest light transmittance H corresponding to the refresh rate F is calculated, and the ratio of the highest light transmittance H to the highest light transmittance H 0 corresponding to the default refresh rate is used as the pixel adjustment coefficient K.
  • the pixel adjustment coefficient is determined according to the refresh rate and the correspondence between the preset refresh rate and the pixel adjustment coefficient.
  • the refresh rate is constantly changed, and each time the refresh rate is changed, the pixel value of the video frame is adjusted in the same proportion so that the display screen is in the same proportion.
  • the display brightness at the refresh rate is consistent with the display brightness at the default refresh rate, and then the adjustment ratio is used as the pixel adjustment coefficient, and the pixel adjustment coefficient corresponding to each different refresh rate is determined accordingly.
  • the adjustment ratio is used as the pixel adjustment coefficient, and the pixel adjustment coefficient corresponding to each different refresh rate is determined accordingly.
  • S203 Perform pixel processing on each frame of video data corresponding to the refresh rate according to the pixel adjustment coefficient.
  • the pixel value of each pixel in each frame of video data corresponding to the refresh rate is multiplied by the pixel adjustment coefficient to obtain the processed video data. For example, if the pixel adjustment coefficient is (Kr, Kg, Kb), and the pixel value of a certain pixel is (200, 100, 200), multiply the two to obtain (200*Kr, 100*Kg, 200*Kb).
  • Kr, Kg, and Kb can be the same or different, and this solution does not require this.
  • S204 Output the processed video data to the screen driver board, so that the screen driver board drives the display screen to display the video data.
  • the screen driver board drives the display screen to display the video data.
  • FIG. 12 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • the display device 004 includes a main board 700, a power supply board 800, and a display screen 900.
  • the main board 700 is respectively connected to the power supply board 800 and the display screen 900, and the power supply board 800 is also connected to the display screen 900.
  • the power supply board 800 is connected to the backlight light source of the display screen 900.
  • the main board 700 is used to obtain the refresh rate corresponding to the video data to be displayed, generate a backlight control signal according to the refresh rate, and then send the backlight control signal to the power board 800.
  • the power board 800 drives the backlight light source of the display screen 900 according to the received backlight control signal.
  • the characteristics of the backlight control signal corresponding to different refresh rates are different, and the characteristics include a duty cycle.
  • FIG. 13 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • the motherboard 700 includes at least: a refresh rate monitoring unit 720 and a backlight adjustment unit 730.
  • the power board 800 includes a backlight driving unit 810.
  • the motherboard 700 further includes a video data acquisition unit 710, which is configured to acquire video data to be displayed from the video data source 002, and perform processing such as decoding the video data.
  • the video data source 002, the video data obtaining unit 710, and the refresh rate monitoring unit 720 are consistent with the corresponding content in the foregoing embodiment, and will not be repeated here.
  • the refresh rate monitoring unit 720 sends the acquired refresh rate to the backlight adjustment unit 720, and the backlight adjustment unit 730 determines the backlight brightness according to the refresh rate in real time, adjusts the backlight control signal, and sends the backlight control signal to the backlight driving unit 810.
  • the backlight control signal may be a signal that satisfies any transmission protocol, such as a pulse width modulation (PWM) signal, an I 2 C signal, and a serial peripheral interface (Serial Peripheral Interface, SPI) signal. Wait.
  • PWM pulse width modulation
  • I 2 C I 2 C
  • SPI Serial Peripheral Interface
  • different refresh rates correspond to different backlight brightness.
  • the backlight adjustment unit 730 needs to adjust the duty cycle of the backlight control signal. It should be understood that the higher the duty cycle of the backlight control signal, the longer the duration of driving the backlight light source to light up, the higher the brightness of the backlight perceived by the human eye; conversely, the lower the duty cycle of the backlight control signal, the lower the brightness of the backlight The lower.
  • FIG. 14 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • the backlight adjustment unit 730 includes: an adjustment coefficient determination sub-unit 731 and a signal adjustment sub-unit 732.
  • the adjustment coefficient determining subunit 731 determines the adjustment coefficient according to the refresh rate;
  • the signal adjustment subunit 732 adjusts the duty cycle of the default backlight control signal according to the adjustment coefficient, and generates the backlight corresponding to the refresh rate according to the adjusted duty ratio
  • the control signal wherein the default backlight control signal is a control signal preset for the default refresh rate.
  • the backlight driving unit 810 drives the backlight of the display screen to achieve the required backlight brightness according to the backlight control signal to compensate for the darker display brightness when the refresh rate is high, or to suppress the brighter display brightness when the refresh rate is low.
  • the motherboard 700 further includes: an image processing unit 740 and a video output unit 750.
  • the image processing unit 740 obtains video data from the video data obtaining unit 710, and performs rendering processing on the video data, for example, performs image quality optimization processing on the video data, and then sends the processed video data to the video output unit 750.
  • the video output unit 750 sends the video data to the display screen for display.
  • the video output unit 750 sends the video data to the screen drive board (not shown in the figure) through the display signal, and the screen drive board generates the screen drive signal. And sent to the display screen 900 to drive the display screen 900 to display the corresponding video data.
  • the refresh rate monitoring unit 720 obtains the refresh rate corresponding to the video data to be displayed in real time, and the backlight adjustment unit 730 adjusts the backlight control signal according to the refresh rate, and then the backlight driving unit 810 According to the backlight control signal, the backlight of the display screen is driven to achieve the required backlight brightness.
  • the display brightness of the display screen is compensated or suppressed by adjusting the backlight brightness, so that the display brightness of the display screen remains stable.
  • FIG. 15 is a schematic flowchart of a display control method provided by an embodiment of the application. As shown in Figure 15, the method includes:
  • S302 Generate a backlight control signal according to the refresh rate.
  • the backlight adjustment unit 730 in order to control the backlight brightness to change adaptively with the change of the refresh rate, the backlight adjustment unit 730 generates a backlight control signal corresponding to the refresh rate in real time according to the refresh rate.
  • the backlight control signal has The duty cycle corresponding to this refresh rate.
  • the adjustment coefficient is determined according to the refresh rate, and the duty cycle of the default backlight control signal is adjusted according to the adjustment coefficient to obtain the backlight control signal corresponding to the refresh rate.
  • the default backlight control signal is a control signal preset for the default refresh rate.
  • the adjustment coefficient K is calculated.
  • A is the preset coefficient. In some embodiments, A is generally a value greater than 0 and less than 2.
  • the highest light transmittance H is directly proportional to the backlight brightness that needs to be adjusted, so by the formula Be able to derive formulas And the formula
  • the derivation process of is the same as the derivation process of the embodiment shown in FIG. 7, and will not be repeated here.
  • the adjustment coefficient is determined according to the refresh rate and the correspondence between the preset refresh rate and the adjustment coefficient.
  • the pixel adjustment coefficients at different refresh rates need to be obtained in advance through experimental data.
  • the refresh rate is constantly changed, and each time the refresh rate is changed, the duty cycle of the backlight driving signal is adjusted, Make the display brightness of the display at the refresh rate consistent with the display brightness at the default refresh rate, and then use the ratio of the adjusted duty cycle of the backlight control signal to the duty cycle of the backlight control signal at the default refresh rate as The adjustment factor corresponding to the refresh rate.
  • the adjustment coefficient corresponding to the refresh rate obtained in real time is multiplied by the duty cycle of the default backlight control signal to obtain the duty cycle of the backlight control signal corresponding to the refresh rate, and the default backlight control signal
  • the duty ratio of is adjusted to the duty ratio of the required backlight control signal, and then the backlight driving signal is output to the backlight driving unit 810.
  • the backlight control signal Take the backlight control signal as the PWM signal as an example for description.
  • S303 Drive the backlight light source of the display screen according to the backlight control signal.
  • the refresh rate corresponding to the video data to be displayed is acquired in real time, and the backlight control signal is generated according to the refresh rate, and then according to the backlight control signal, the backlight light source of the display screen is driven to achieve the required backlight brightness, which is achieved By adjusting the backlight brightness, the display brightness of the display screen is compensated or suppressed, so that the display brightness of the display screen remains stable.

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Abstract

一种显示设备（001）及其控制方法，显示设备（001）包括主板（100，700）、电源板（800）和显示屏（300，900），主板（100，700）获取待显示的视频数据对应的刷新率，并根据刷新率调整背光控制信号，电源板（800）根据接收到的背光控制信号驱动显示屏（300，900）的背光源，使显示屏（300，900）的背光达到对应的背光亮度，显示屏（300，900）显示的画面亮度稳定，避免显示画面忽明忽暗。

Description

显示设备以及显示控制方法
本申请要求于2020年06月01日提交的中国专利局、申请号为202010483455.9、申请名称为“显示设备以及显示的控制方法”；于2020年06月01日提交的中国专利局、申请号为202010483707.8、申请名称为“显示设备以及显示的控制方法”；于2020年06月01日提交的中国专利局、申请号为202010483467.1、申请名称为“显示设备以及显示的控制方法”；于2020年05月26日提交的中国专利局、申请号为202010455268.X、申请名称为“屏幕背光频率调整方法、装置、设备及存储介质”；于2020年06月03日提交的中国专利局、申请号为202010492953.X、申请名称为“显示设备及视频信息处理方法”；于2020年06月03日提交的中国专利局、申请号为202010493104.6、申请名称为“显示设备以及视频信息处理方法”；的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示设备技术领域，具体而言，涉及一种显示设备以及显示控制方法。
背景技术
随着科技的发展，用户对于显示设备的显示效果，例如显示的流畅性，有越来越高的要求。由于图形处理器(Graphics Processing Unit，GPU)在渲染图像的过程中，帧率并不是固定不变的，因此显示设备需通过设置可变刷新率(Variable Refresh Rate，VRR)来匹配GPU的帧率变化，以使显示设备显示的内容更加流畅。然而，显示屏的刷新率的变化，会使显示屏的显示亮度发生变化，导致显示过程中存在忽明忽暗的情况，影响了用户体验。
发明内容
在一些实施例中，本申请提供一种显示设备，包括：主板、电源板和显示屏；所述主板分别与所述电源板和所述显示屏连接，所述电源板与所述显示屏连接，所述主板被配置为：获取待显示的视频数据对应的刷新率，并根据所述刷新率，生成背光控制信号，其中，不同刷新率对应的背光控制信号的占空比不同；所述电源板被配置为：接收所述背光控制信号，并根据所述背光控制信号，驱动所述显示屏的背光光源。
在一些实施例中，所述主板包括刷新率监控单元和背光调整单元；所述刷新率监控单元被配置为：获取所述视频数据对应的刷新率；所述背光调整单元被配置为：根据所述刷新率，生成所述背光控制信号。
在一些实施例中，所述背光调整单元包括：调整系数确定子单元和信号调整子单元；所述调整系数确定子单元被配置为：根据所述刷新率，确定调整系数；所述信号调整子单元被配置为：根据所述调整系数，对默认的背光控制信号的占空比进行调整，并根据调整后的占空比生成所述刷新率对应的背光控制信号；所述默认的背光控制信号为针对默认刷新率预设的控制信号。
在一些实施例中，所述调整系数确定子单元具体被配置为：
根据所述刷新率F和公式
Figure PCTCN2021081883-appb-000001
计算得到所述调整系数K；
其中，
Figure PCTCN2021081883-appb-000002
为所述默认刷新率对应的平均光透过率，tr为所述显示屏的响应时间，A为预设系数。
在一些实施例中，所述调整系数确定子单元具体被配置为：根据所述刷新率和预设的刷新率与调整系数的对应关系，确定所述调整系数。
在一些实施例中，所述刷新率监控单元具体被配置为：根据所述待显示的视频数据中的每个视频帧对应的场同步信号，确定所述刷新率。
在一些实施例中，本申请还提供一种显示的控制方法，包括：获取待显示的视频数据对应的刷新率；根据所述刷新率，生成背光控制信号；其中，不同刷新率对应的背光控制信号的占空比不同，所述背光控制信号用于驱动显示屏的背光光源。
在一些实施例中，所述根据所述刷新率，生成背光控制信号，包括：根据所述刷新率，确定调整系数；根据所述调整系数，对默认的背光控制信号的占空比进行调整，并根据调整后的占空比，生成所述刷新率对应的背光控制信号；所述默认的背光控制信号为针对默认刷新率预设的控制信号。
在一些实施例中，，所述根据所述刷新率，确定调整系数，包括：
根据所述刷新率F和公式
Figure PCTCN2021081883-appb-000003
计算得到所述调整系数K；
其中，
Figure PCTCN2021081883-appb-000004
为所述默认刷新率对应的平均光透过率，tr为所述显示屏的响应时间，A为预设系数。
在一些实施例中，所述根据所述刷新率，生成背光控制信号，包括：根据所述刷新率和预设的刷新率与调整系数的对应关系，确定所述调整系数。
本申请实施例还提供一种显示设备，包括主板、屏驱动板和显示屏；所述屏驱动板连接于所述主板和所述显示屏之间；所述主板被配置为：获取待显示的视频数据对应的刷新率；根据所述刷新率确定像素调整系数；根据所述像素调整系数，对所述刷新率对应的每帧视频数据进行像素处理；将处理后的视频数据输出至所述屏驱动板，使所述屏驱动板驱动所述显示屏显示所述视频数据。
在一些实施例中，所述主板包括：刷新率监控单元，被配置为获取待显示的视频数据对应的刷新率；调整系数确定单元，被配置为根据所述刷新率确定像素调整系数；图像处理单元，被配置为根据所述像素调整系数，对所述刷新率对应的每帧视频数据进行像素处理；视频输出单元，被配置为将处理后的视频数据输出至所述屏驱动板，使所述屏驱动板驱动所述显示屏显示所述视频数据。
在一些实施例中，所述调整系数确定单元具体被配置为：
根据所述刷新率F和公式
Figure PCTCN2021081883-appb-000005
计算得到所述刷新率F对应的最高光透过率H；将所述最高光透过率H与默认刷新率对应的最高光透过率H 0的比值作为所述像素调整系数K；
其中，
Figure PCTCN2021081883-appb-000006
为所述默认刷新率对应的平均光透过率，tr为所述显示屏的响应时间。
在一些实施例中，所述调整系数确定单元具体被配置为：根据所述刷新率和预设的刷新率与像素调整系数的对应关系，确定所述像素调整系数。
在一些实施例中，所述图像处理单元具体被配置为：将所述刷新率对应的每帧视频数据中每个像素点的像素值与所述像素调整系数相乘。
在一些实施例中，所述刷新率监控单元具体被配置为：根据所述待显示的视频数据中的每个视频帧对应的场同步信号，确定所述刷新率。
本申请实施例还提供一种显示的控制方法，包括：获取待显示的视频数据对应的刷新率；根据所述刷新率确定像素调整系数；根据所述像素调整系数，对所述刷新率对应的每帧视频数据进行像素处理；将处理后的视频数据输出至屏驱动板，使所述屏驱动板驱动显示屏显示所述视频数据。
在一些实施例中，所述根据所述刷新率确定像素调整系数，包括：
根据所述刷新率F和公式
Figure PCTCN2021081883-appb-000007
计算得到所述刷新率F对应的最高光透过率H；
将所述最高光透过率H与默认刷新率对应的最高光透过率H 0的比值作为所述像素调整系数K；其中，
Figure PCTCN2021081883-appb-000008
为所述默认刷新率对应的平均光透过率，tr为所述显示屏的响应时间。
在一些实施例中，所述根据所述刷新率确定像素调整系数，包括：根据所述刷新率和预设的刷新率与像素调整系数的对应关系，确定所述像素调整系数。
在一些实施例中，所述根据所述像素调整系数，对所述刷新率对应的每帧视频数据进行像素处理，包括：将所述刷新率对应的每帧视频数据中每个像素点的像素值与所述像素调整系数相乘。
本申请实施例还提供一种显示设备，包括：主板、屏驱动板和显示屏；所述屏驱动板连接于所述主板和所述显示屏之间；所述主板用于：获取待显示的视频数据对应的刷新率；根据所述刷新率确定一组伽马电压，并将所述一组伽马电压发送至所述屏驱动板，其中，所述一组伽马电压用于使所述屏驱动板对接收到的显示信号进行映射，得到驱动所述显示屏显示所述视频数据的屏驱动信号。
在一些实施例中，所述主板包括：刷新率监控单元，被配置为：获取所述视频数据对应的刷新率；伽马电压处理单元，被配置为：根据所述刷新率确定所述一组伽马电压，并将所述一组伽马电压发送至所述屏驱动板。
在一些实施例中，所述伽马电压处理单元包括：伽马电压系数确认子单元，被配置为：根据所述刷新率，计算得到伽马电压的调整系数；伽马电压调整子单元被配置为：根据所述调整系数对一组默认伽马电压进行调整，得到所述一组伽马电压；所述一组默认伽马电压为针对默认刷新率预设的一组伽马电压。
在一些实施例中，所述伽马电压系数确认子单元具体被配置为：
根据所述刷新率F和公式
Figure PCTCN2021081883-appb-000009
计算得到所述伽马电压的调整系数K；
其中，
Figure PCTCN2021081883-appb-000010
为所述默认刷新率对应的平均光透过率，tr为所述显示屏的响应时间。
在一些实施例中，所述伽马电压调整子单元具体被配置为：将每个默认伽马电压与基准电压进行求差运算，得到差值；所述基准电压为所述显示设备对应的液晶分子偏转的参考电压；将所述差值乘以所述调整系数后，再与所述基准电压进行求和运算，得到所述一组伽马电压。
在一些实施例中，所述伽马电压处理单元具体被配置为：根据所述刷新率和预设的刷新率与伽马电压的对应关系，确定所述一组伽马电压。
在一些实施例中，所述伽马电压处理单元具体被配置为：根据所述刷新率和预设的刷新率与伽马电压的偏移量的对应关系，确定所述一组伽马电压的偏移量；根据所述一组伽马电压的偏移量和一组默认伽马电压，计算得到所述一组伽马电压；所述一组默认伽马电压为针对默认刷新率预设的一组伽马电压。
在一些实施例中，所述屏驱动板被配置为：根据所述一组伽马电压生成伽马曲线；将所述显示信号根据所述伽马曲线进行映射，得到所述屏驱动信号；根据所述屏驱动信号，驱动所述显示屏显示所述视频数据。
在一些实施例中，所述刷新率与所述一组伽马电压一一对应。
本申请实施例还提供一种显示的控制方法，包括：获取待显示的视频数据对应的刷新率；根据所述刷新率确定一组伽马电压，并将所述一组伽马电压发送至屏驱动板，其中，所述一组伽马电压用于使所述屏驱动板对接收到的显示信号进行映射，得到驱动显示屏显示所述视频数据的屏驱动信号。
本申请实施例提供的显示设备以及显示的控制方法，通过实时获取待显示的视频数据 对应的刷新率，并根据刷新率动态确定显示参数，显示参数包括但不限于伽马电压、像素调整系数、背光亮度等中的至少一种，再根据显示参数控制显示屏显示该视频数据，以调整显示屏所显示画面的亮度稳定，避免显示画面忽明忽暗。
附图说明
为了更清楚地说明本申请的实施方式，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的一种液晶显示屏的显示周期示意图；
图2为本申请实施例提供的一种显示设备的结构示意图；
图3为本申请实施例提供的一种显示设备的结构示意图；
图4为本申请实施例提供的一种显示设备的结构示意图；
图5为本申请实施例提供的一种伽马曲线的示意图；
图6为本申请实施例提供的一种显示的控制方法的流程示意图；
图7为本申请实施例提供的一种显示周期与光透过率关系的示意图；
图8为本申请实施例提供的一种Gamma电压缩小的示意图；
图9为本申请实施例提供的一种显示设备的结构示意图；
图10为本申请实施例提供的一种显示设备的结构示意图；
图11为本申请实施例提供的一种显示的控制方法的流程示意图；
图12为本申请实施例提供的一种显示设备的结构示意图；
图13为本申请实施例提供的一种显示设备的结构示意图；
图14为本申请实施例提供的一种显示设备的结构示意图；
图15为本申请实施例提供的一种显示的控制方法的流程示意图。
具体实施方式
为使本申请的目的、实施方式和优点更加清楚，下面将结合本申请示例性实施例中的附图，对本申请示例性实施方式进行清楚、完整地描述，显然，所描述的示例性实施例仅是本申请一部分实施例，而不是全部的实施例。
基于本申请描述的示例性实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请所附权利要求保护的范围。此外，虽然本申请中公开内容按照示范性一个或几个实例来介绍，但应理解，可以就这些公开内容的各个方面也可以单独构成一个完整实施方式。需要说明的是，本申请中对于术语的简要说明，仅是为了方便理解接下来描述的实施方式，而不是意图限定本申请的实施方式。除非另有说明，这些术语应当按照其普通和通常的含义理解。
目前，显示设备可通过可变刷新率(Variable Refresh Rate，VRR)显示协议，例如Gsync、Freesync等等，来设置不同的刷新率，以适应图形处理器(Graphics Processing Unit，GPU)的帧率变化，使显示的内容更加流畅。其中，显示设备可以是电视机、电脑、智能显示屏、一体机、手机、笔记本等任意具有显示屏的终端设备。以显示屏为液晶显示屏为例，显示设备刷新率的变化会导致液晶分子翻转时间占显示周期总时间的占比发生变化，从而导致单位时间内显示屏的平均光透过率发生变化，进而引起显示亮度的变化。
图1为本申请实施例提供的一种液晶显示屏的显示周期示意图。液晶显示屏的显示过程分为两部分，一部分为响应过程，一部分为显示过程。结合图1所示，横轴为时间t轴，纵轴为光透过率h轴。其中，tr1或tr2为响应过程对应的响应时间，即液晶分子旋转到指定状态所需的时间；ton为显示过程对应的显示时间，即液晶分子旋转到指定状态后正常显示的时间。图1中示出的为两种刷新率下液晶显示屏的光透过率的变化，刷新率a小于刷新率b，因此在刷新率b下液晶显示屏的显示周期较小，在 相同液晶驱动的情况下，液晶分子的响应时间基本相同，即tr1等于tr2，因此刷新率b下的显示周期小于刷新率a下的显示周期，将缩短显示时间ton，即ton2小于ton1。
可见，刷新率越高时，液晶显示屏的亮度越暗，刷新率越低时，液晶显示屏的亮度越亮。随着刷新率的变化，液晶显示屏的显示画面会出现忽明忽暗的情况。本申请实施例应用可与上述场景中，根据刷新率的不同确定不同的显示参数，显示设备根据不同的显示参数进行显示，以使显示屏保持显示亮度的稳定性，避免显示画面忽明忽暗。其中，显示参数包括但不限于伽马电压、像素调整系数、背光亮度等中的至少一种。
为了使显示屏在显示的过程中保持显示亮度的稳定性，本申请实施例实时获取待显示的视频数据对应的刷新率，并根据刷新率动态确定显示参数，再根据显示参数控制显示屏显示该视频数据，以调整显示屏所显示画面的亮度稳定。
在一些实施例中，本申请提出动态调整伽马电压，改变液晶分子的平均光透过率，从而实现可变刷新率，具体方案如下：
图2为本申请实施例提供的一种显示设备的结构示意图。如图2所示，显示设备001包括主板100、屏驱动板200和显示屏300。屏驱动板200连接于主板100和显示屏300之间。主板100用于获取待显示的视频数据对应的刷新率，并根据刷新率确定一组伽马电压，再将该一组伽马电压发送至屏驱动板200。其中，一组伽马电压用于使屏驱动板200对接收到的显示信号进行映射，以得到驱动显示屏300显示视频数据的屏驱动信号。屏驱动板200根据一组伽马电压和接收到的显示信号，生成屏驱动信号，并将屏驱动信号发送至显示屏300，使显示屏300根据屏驱动信号，显示视频数据。
图3为本申请实施例提供的一种显示设备的结构示意图。如图3所示，主板100至少包括：刷新率监控单元120和伽马Gamma电压处理单元130。如图3所示，在一些实施例中，刷新率监控单元120获取待显示的视频数据的场同步信号，每帧视频数据对应一个场同步信号，场同步信号中携带有该视频帧对应的刷新率。在一些实施例中，场同步信号在对应的视频帧之前发送。
在一些实施例中，主板100中还包括视频数据获取单元110，视频数据获取单元110用于从视频数据源002获取待显示的视频数据，以及对视频数据进行解码等处理。在一些实施例中，刷新率监控单元120从视频数据获取单元110中获取待显示的视频数据的场同步信号。视频数据源002可以是服务器、存储介质、图像采集装置、高清多媒体接口(High Definition Multimedia Interface，HDMI)通道等。
在一些实施例中，视频数据源002先将视频数据发送至GPU(图中未示出)，使GPU对视频数据进行渲染处理，同时生成场同步信号，刷新率监控单元120从GPU获取场同步信号和经过渲染处理的视频数据。在一些实施例中，GPU可设置在显卡上或者设置在主板上，在一些实施例中，显卡可独立于主板，或者集成于主板上。刷新率监控单元120将获取的刷新率发送至伽马电压处理单元130，伽马电压处理单元130根据刷新率确定一组伽马电压，并将一组伽马电压发送至屏驱动板200。一组伽马电压包括屏驱动板200对显示信号进行映射所需的多个伽马电压，在一些实施例中伽马电压的数量可以是12个。
图4为本申请实施例提供的一种显示设备的结构示意图。如图4所示，在一些实施例中，伽马电压处理单元130包括：伽马电压系数确认子单元131和伽马电压调整子单元132。伽马电压系数确认子单元131根据刷新率，计算得到伽马电压的调整系数；伽马电压调整子单元132根据调整系数对一组默认伽马电压进行调整，得到所述一组伽马电压；所述一组默认伽马电压为针对默认刷新率预设的一组伽马电压。
在一些实施例中，视频数据获取单元110、刷新率监控单元120和伽马电压处理单元130可以设置在主板的***集成芯片(System-on-a-Chip，SOC)中。屏驱动板200 根据接收到的多个Gamma电压，生成伽马曲线，将接收到的显示信号根据伽马曲线进行映射，得到屏驱动信号，再根据屏驱动信号驱动显示屏300显示视频数据。其中，显示信号为符合任一图像传输协议的信号，例如VByOne信号、低电压差分信号(Low-Voltage Differential Signaling，LVDS)信号等等。
图5为本申请实施例提供的一种伽马曲线的示意图。伽马电压处理单元130将12个伽马电压V1至V12发送至屏驱动板200，屏驱动板200根据伽马电压V1至V12生成如图5所示的伽马曲线，该伽马曲线位于横轴为图像数据值，纵轴为电压值的二维坐标系中，应理解V6等于V7，并等于液晶分子偏转的参考电压Vcom。进而，屏驱动板200将接收到的显示信号的电压值，在生成的伽马曲线中进行映射，得到每个显示信号对应的图像数据值(图像数据值一般在0至255之间)，并根据该图像数据值生成屏驱动信号，以驱动显示屏300显示对应的视频数据。
应理解，伽马曲线的不同将会使显示信号映射出不同的图像数据值。在刷新率增大时，应使伽马电压处理单元130输出更大的伽马电压，根据增大的伽马电压生成的伽马曲线，所映射出的图像数据值更低，因此亮度更高。反之，使伽马电压处理单元130输出较小的伽马电压，可以是显示屏的显示亮度降低。一般来说，不同的刷新率对应不同的一组伽马电压，即刷新率与一组伽马电压一一对应；或者，多个刷新率与一组伽马电压对应，例如多个数值相邻的刷新率。
在一些实施例中，显示设备001中还可以包括Gamma芯片(Integrated Circuit Chip，IC)(图中未示出)，该Gamma IC可设置在主板上，或者设置在屏驱动板上，本申请对此不做要求。在一些实施例中，Gamma IC和伽马处理单元可通过(Inter Integrated-Circuit，I 2C)端口连接，Gamma IC和屏驱动板可通过多个输入输出I/O端口连接，Gamma IC通过I 2C总线接收伽马处理单元发送的一组伽马电压的电压数值，并将每个伽马电压的电压数值转换成电压通过多个I/O端口分别发送至屏驱动板200。
本申请实施例提供的显示设备001中，通过刷新率监控单元120实时获取待显示的视频数据对应的刷新率，并通过伽马电压处理单元130根据刷新率实时调整一组伽马电压的大小，再通过屏驱动板200根据一组伽马电压生成伽马曲线，进而改变显示信号在伽马曲线中的映射结果，实现对显示亮度的调整，避免了显示画面忽明忽暗的问题。
本申请实施例还提供一种显示的控制方法，应用于上述任一实施例提供的显示设备001中。
图6为本申请实施例提供的一种显示的控制方法的流程示意图。如图6所示，该方法包括：S101：获取待显示的视频数据对应的刷新率。S102：根据刷新率确定一组伽马电压。在本步骤中，为了控制伽马电压随着刷新率的变化而进行适应性的变化，通过伽马电压处理单元130根据刷新率实时确定一组伽马电压，对此本申请实施例提供以下几种可能的实现方式：
在一些实施例中，根据刷新率，计算得到伽马电压的调整系数，并根据调整系数对多个一组默认伽马电压进行调整，得到一组伽马电压。其中，一组默认伽马电压为针对默认刷新率预设的一组伽马电压，一般来说，默认刷新率为显示设备在未设置VRR时的固定刷新率。
图7为本申请实施例提供的一种显示周期与光透过率关系的示意图。为了控制显示设备的显示亮度始终稳定，需要控制显示屏的平均光透过率稳定，即在任何刷新率下，保证显示屏的平均光透过率不变。基于上述原因，结合图7所示，能够得出刷新率F和显示时间ton之间的关系可通过公式(1)ton＝1/F-tr表示，其中，tr为显示屏的响应时间；默认刷新率下的平均光透过率可通过公式(2)
Figure PCTCN2021081883-appb-000011
表示，其中H为实时获取的刷新率下的最高光透过率。
根据公式(1)和公式(2)，能够得出
Figure PCTCN2021081883-appb-000012
因H与伽马电压具有正相关性，因此，能够得出调整系数
Figure PCTCN2021081883-appb-000013
在一些实施例中，将每个默认伽马电压与基准电压Vcom进行求差运算，得到差值，再将差值乘以调整系数后，与基准电压Vcom进行求和运算，即对默认伽马电压进行放大或缩小，得到最终的一组伽马电压。
图8为本申请实施例提供的一种Gamma电压缩小的示意图。在调整系数K小于1时，对一组默认伽马电压进行缩小，例如图8所示的由实线缩小至虚线所示的位置。
在一些实施例中，根据刷新率和预设的刷新率与伽马电压的对应关系，确定一组伽马电压。
在本实现方式中，需要通过试验数据预先对不同刷新率下的伽马电压进行获取。在一些实施例中，在显示内容不变的情况下，例如显示纯白内容时，不断改变刷新率，并在每次改变刷新率时，通过对一组默认伽马电压进行调整，使显示屏在该刷新率下的显示亮度与默认刷新率下的显示亮度一致，再将调整后的一组伽马电压作为与该刷新率对应的伽马电压，据此确定每个不同的刷新率对应的伽马电压。本实施例中因预先确定了每个刷新率对应的伽马电压，简化了计算流程，提高了伽马电压处理单元130的处理效率。
在一些实施例中，根据刷新率和预设的刷新率与伽马电压的偏移量的对应关系，确定一组伽马电压的偏移量；并根据一组伽马电压的偏移量和一组默认伽马电压，计算得到一组伽马电压。需要通过试验数据预先对不同刷新率下的伽马电压的偏移量进行获取。在一些实施例中，在显示内容不变的情况下，例如显示纯白内容，不断改变刷新率，并在每次改变刷新率时，通过对一组默认伽马电压进行调整，使显示屏在该刷新率下的显示亮度与默认刷新率下的显示亮度一致，再将调整一组默认伽马电压时调整的偏移量作为与该刷新率对应的一组伽马电压的偏移量，据此确定每个不同的刷新率对应的一组伽马电压的偏移量。应理解，一组伽马电压的偏移量可以相同也可以不同，本方案对此不做要求。若一组伽马电压的偏移量均相同，则刷新率与伽马电压的偏移量的对应关系的数据量较小，节省了存储空间。
在一些实施例中，根据一组伽马电压的偏移量和一组默认伽马电压，通过计算可以得到最终的一组伽马电压。
S103：将一组伽马电压发送至屏驱动板。
本步骤中，将一组伽马电压发送至屏驱动板，使屏驱动板根据一组伽马电压和接收到的显示信号，驱动显示屏显示视频数据。通过实时获取待显示的视频数据对应的刷新率，并根据刷新率实时调整一组伽马电压的大小，再根据一组伽马电压生成伽马曲线，进而改变显示信号在伽马曲线中的映射结果，实现对显示亮度的调整，避免了显示画面忽明忽暗的问题。在一些实施例中，本申请提出动态调整视频数据的像素值，放大或者压缩像素值的大小方式，从而实现可变刷新率：
图9为本申请实施例提供的一种显示设备的结构示意图。如图9所示，显示设备003包括主板400、屏驱动板500和显示屏600。屏驱动板500连接于主板400和显示屏600之间。主板400用于获取待显示的视频数据对应的刷新率，并根据刷新率确定像素调整系数，根据像素调整系数对刷新率对应的每帧视频数据进行像素处理，再将处理后的视频数据输出至屏驱动板。屏驱动板500驱动显示屏600显示该处理后的视频数据。
图10为本申请实施例提供的一种显示设备的结构示意图。如图10所示，在一些实施例中，主板400至少包括：刷新率监控单元420、调整系数确定单元430、图像处 理单元440和视频输出单元450。在一些实施例中，主板400中还包括视频数据获取单元410，视频数据获取单元410用于从视频数据源002获取待显示的视频数据，以及对视频数据进行解码等处理。本申请实施例中，视频数据源002、视频数据获取单元410以及刷新率监控单元420与前述实施例的中相应的内容均一致，此处不再赘述。
刷新率监控单元420将获取的刷新率发送至调整系数确定单元430，调整系数确定单元430实时根据刷新率，确定像素调整系数，并将与刷新率匹配的像素调整系数发送至图像处理单元440。
图像处理单元440接收调整系数确定单元430发送的像素调整系数，并且，从视频数据获取单元410中获取视频数据。图像处理单元440根据像素调整系数，对获取的刷新率对应的每帧视频数据进行像素处理。应理解，在刷新率较低时，显示亮度较高，则需要对像素值进行放大，以降低显示亮度；反之，在刷新率较高时，显示亮度较低，则需要对像素值进行压缩，以提高显示亮度。
视频输出单元450将经过像素处理的视频数据输出至屏驱动板500，使屏驱动板500生成驱动信号，并通过驱动信号，驱动显示屏显示该视频数据。在一些实施例中，视频数据获取单元410、刷新率监控单元420、调整系数确定单元430、图像处理单元440和视频输出单元450均可设置在主板的SOC中。
本申请实施例提供的显示设备003中，通过刷新率监控单元420实时获取待显示的视频数据对应的刷新率，并通过调整系数确定单元430根据刷新率确定像素调整系数，再通过图像处理单元440根据像素调整系数对待显示的视频数据进行像素处理，放大或者压缩像素值的大小，实现对显示亮度的调整，使得显示屏最终显示的视频数据的显示亮度稳定。
本申请实施例还提供一种显示的控制方法，应用于上述任一实施例提供的显示设备003中。
图11为本申请实施例提供的一种显示的控制方法的流程示意图。如图11所示，该方法包括：S201：获取待显示的视频数据对应的刷新率。S202：根据刷新率确定像素调整系数。本申请实施例为了针对不同的刷新率，确定不同的像素调整系数，以实现对每个视频帧的像素进行像素处理，使最终显示的视频数据具有稳定的显示亮度。在本步骤中，提供以下几种可能的实现方式，以确定像素调整系数。
在一些实施例中、根据刷新率F和公式
Figure PCTCN2021081883-appb-000014
计算得到刷新率F对应的最高光透过率H，并将最高光透过率H与默认刷新率对应的最高光透过率H 0的比值作为像素调整系数K。其中，
Figure PCTCN2021081883-appb-000015
为默认刷新率对应的平均光透过率，tr为显示屏的响应时间。
公式
Figure PCTCN2021081883-appb-000016
的推导过程与图7所示实施例的推导过程相同，此处不再赘述。
在一些实施例中、根据刷新率和预设的刷新率与像素调整系数的对应关系，确定像素调整系数。
在本实现方式中，需要通过试验数据预先对不同刷新率下的像素调整系数进行获取。在一些实施例中，在显示内容不变的情况下，例如显示纯白图像，不断改变刷新率，并在每次改变刷新率时，通过同比例调整视频帧的像素值，使显示屏在该刷新率下的显示亮度与默认刷新率下的显示亮度一致，再将调整比例作为像素调整系数，据此确定每个不同的刷新率对应的像素调整系数。本实施例中，通过预先建立刷新率与像素调整系数的对应关系，并实时根据刷新率确定对应的像素调整系数，避免了公式计算带来的误差，提高了显示亮度调节的准确性。
S203：根据像素调整系数，对刷新率对应的每帧视频数据进行像素处理。在一些实施 例中，将刷新率对应的每帧视频数据中每个像素点的像素值与像素调整系数相乘，以得到处理后的视频数据。例如，像素调整系数为(Kr，Kg，Kb)，某像素点的像素值为(200，100，200)，则将二者相乘得到(200*Kr，100*Kg，200*Kb)。其中，Kr、Kg和Kb可以相同也可以不同，本方案对此不做要求。
S204：将处理后的视频数据输出至屏驱动板，使屏驱动板驱动显示屏显示视频数据。本申请实施例中，通过实时获取待显示的视频数据对应的刷新率，并根据刷新率确定像素调整系数，再根据像素调整系数对待显示的视频数据进行像素处理，放大或者压缩像素值的大小，实现对显示亮度的调整，使得显示屏最终显示的视频数据的显示亮度稳定。
在一些实施例中，本申请通过动态调整背光亮度，补偿或者抑制显示屏的显示亮度方式，实现可变刷新率。图12为本申请实施例提供的一种显示设备的结构示意图。如图12所示，显示设备004包括主板700、电源板800和显示屏900。主板700分别与电源板800和显示屏900连接，且电源板800还与显示屏900连接，在一些实施例中，电源板800与显示屏900的背光光源连接。主板700用于获取待显示的视频数据对应的刷新率，并根据刷新率，生成背光控制信号，再将背光控制信号发送给电源板800。电源板800根据接收到的背光控制信号，驱动显示屏900的背光光源。其中，不同的刷新率对应的背光控制信号的特征不同，该特征包括占空比。
图13为本申请实施例提供的一种显示设备的结构示意图。如图13所示，主板700至少包括：刷新率监控单元720、背光调整单元730。电源板800包括：背光驱动单元810。在一些实施例中，主板700中还包括视频数据获取单元710，视频数据获取单元710用于从视频数据源002获取待显示的视频数据，以及对视频数据进行解码等处理。本申请实施例中，视频数据源002、视频数据获取单元710以及刷新率监控单元720与前述实施例的中相应的内容均一致，此处不再赘述。刷新率监控单元720将获取的刷新率发送至背光调整单元720，背光调整单元730实时根据刷新率，确定背光亮度，调整背光控制信号，并将背光控制信号发送至背光驱动单元810。在一些实施例中，背光控制信号可以是满足任一传输协议的信号，例如脉冲宽度调制(Pulse width modulation，PWM)信号、I 2C信号、串行外设接口(Serial Peripheral Interface，SPI)信号等。
在一些实施例中，不同的刷新率对应不同的背光亮度，为了达到所需的背光亮度，背光调整单元730需要对背光控制信号的占空比进行调整。应理解，背光控制信号的占空比越高，驱动背光光源点亮的时长越常，人眼所感知的背光亮度就越高；反之，背光控制信号的占空比越低，背光的亮度就越低。
图14为本申请实施例提供的一种显示设备的结构示意图。如图14所示，在一些实施例中，背光调整单元730包括：调整系数确定子单元731和信号调整子单元732。调整系数确定子单元731根据刷新率，确定调整系数；信号调整子单元732根据调整系数，对默认的背光控制信号的占空比进行调整，并根据调整后的占空比生成刷新率对应的背光控制信号，其中，默认的背光控制信号为针对默认刷新率预设的控制信号。背光驱动单元810根据背光控制信号，驱动显示屏的背光达到所需的背光亮度，以弥补刷新率较高时的较暗的显示亮度，或者抑制刷新率较低时的较明亮的显示亮度。
在一些实施例中，主板700还包括：图像处理单元740和视频输出单元750。其中，图像处理单元740从视频数据获取单元710获取视频数据，并对视频数据进行渲染处理，例如对视频数据进行画质优化处理，再将处理后的视频数据发送至视频输出单元750。视频输出单元750将视频数据发送至显示屏进行显示，在一些实施例中，视频输出单元750将视频数据通过显示信号发送至屏驱动板(图中未示出)，屏驱动板生成屏驱动信号并发送至显示屏900，以驱动显示屏900显示对应的视频数据。
本申请实施例提供的显示设备004中，通过刷新率监控单元720实时获取待显示的视频数据对应的刷新率，并通过背光调整单元730根据刷新率，调整背光控制信号，再通过背光驱动单元810根据背光控制信号，驱动显示屏的背光达到所需的背光亮度。本实施例 通过调整背光亮度对显示屏的显示亮度进行补偿或者抑制，使显示屏的显示亮度保持稳定。
图15为本申请实施例提供的一种显示的控制方法的流程示意图。如图15所示，该方法包括：
S301：获取待显示的视频数据对应的刷新率。
S302：根据刷新率，生成背光控制信号。
在本步骤中，为了控制背光亮度随着刷新率的变化而进行适应性的变化，通过背光调整单元730实时根据刷新率生成对应于该刷新率的背光控制信号，应理解，该背光控制信号具有与该刷新率对应的占空比。在一些实施例中，根据刷新率，确定调整系数，并根据调整系数，对默认的背光控制信号的占空比进行调整，得到刷新率对应的背光控制信号。其中，默认的背光控制信号为针对默认刷新率预设的控制信号。
本申请实施例对于如何根据刷新率确定调整系数，提供以下几种可能的实现方式：
在一些实施例中、根据刷新率F和公式
Figure PCTCN2021081883-appb-000017
计算得到调整系数K。
其中，
Figure PCTCN2021081883-appb-000018
为所述默认刷新率对应的平均光透过率，tr为所述显示屏的响应时间，A为预设系数。在一些实施例中，A一般为大于0小于2的数值。
应理解，最高光透过率H与所需调整的背光亮度成正比，因此由公式
Figure PCTCN2021081883-appb-000019
能够推导出公式
Figure PCTCN2021081883-appb-000020
且公式
Figure PCTCN2021081883-appb-000021
的推导过程与图7所示实施例的推导过程相同，此处不再赘述。
在一些实施例中，根据刷新率和预设的刷新率与调整系数的对应关系，确定调整系数。
在一些实施例中，需要通过试验数据预先对不同刷新率下的像素调整系数进行获取。在一些实施例中，在显示内容不变的情况下，例如显示纯白图像或者其他灰阶图像，不断改变刷新率，并在每次改变刷新率时，通过调节背光驱动信号的占空比，使显示屏在该刷新率下的显示亮度与默认刷新率下的显示亮度一致，再将调整后的背光控制信号的占空比与默认刷新率下的背光控制信号的占空比的比值，作为与该刷新率对应的调整系数。
在一些实施例中，将与实时获取的刷新率对应的调整系数与默认背光控制信号的占空比相乘，得到与该刷新率对应的背光控制信号的占空比，并将默认背光控制信号的占空比调整为所需的背光控制信号的占空比，再将该背光驱动信号输出至背光驱动单元810。
以背光控制信号为PWM信号为例进行说明。针对某一视频帧，假设在默认刷新率60Hz下，PWM信号的占空比为PWM1＝15％，通过对比刷新率与背光控制信号的对应关系获知，在刷新率为120Hz时，调整系数K＝2。则PWM信号的占空比应设置为PWM2*K＝30％。
S303：根据背光控制信号，驱动显示屏的背光光源。
本申请实施例中，通过实时获取待显示的视频数据对应的刷新率，并根据刷新率，生成背光控制信号，再根据背光控制信号，驱动显示屏的背光光源达到所需的背光亮度，实现了通过调整背光亮度对显示屏的显示亮度进行补偿或者抑制，使显示屏的显示亮度保持稳定。
本领域技术人员在考虑说明书及实践这里发明的公开后，将容易想到本申请的其他实施方案。本申请旨在涵盖本发明的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本申请的一般性原理并包括本申请未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本申请的真正范围和精神由权利要求的内容指出。以上的本申请实施方式并不构成对本申请保护范围的限定。
为了方便解释，已经结合具体的实施方式进行了上述说明。根据上述的教导，可以得 到多种修改和变形。上述实施方式的选择和描述是为了更好的解释原理以及实际的应用，从而使得本领域技术人员更好的使用实施方式以及适于具体使用考虑的各种不同的变形的实施方式。

Claims (10)

  1. 一种显示设备，包括：主板、电源板和显示屏；
    所述主板分别与所述电源板和所述显示屏连接，所述电源板与所述显示屏连接，
    所述主板被配置为：获取待显示的视频数据对应的刷新率，并根据所述刷新率，生成背光控制信号，其中，不同刷新率对应的背光控制信号的占空比不同；
    所述电源板被配置为：接收所述背光控制信号，并根据所述背光控制信号，驱动所述显示屏的背光光源。
  2. 根据权利要求1所述的设备，所述主板包括刷新率监控单元和背光调整单元；
    所述刷新率监控单元被配置为：获取所述视频数据对应的刷新率；
    所述背光调整单元被配置为：根据所述刷新率，生成所述背光控制信号。
  3. 根据权利要求2所述的设备，所述背光调整单元包括：调整系数确定子单元和信号调整子单元；
    所述调整系数确定子单元被配置为：根据所述刷新率，确定调整系数；
    所述信号调整子单元被配置为：根据所述调整系数，对默认的背光控制信号的占空比进行调整，并根据调整后的占空比生成所述刷新率对应的背光控制信号；所述默认的背光控制信号为针对默认刷新率预设的控制信号。
  4. 根据权利要求3所述的设备，所述调整系数确定子单元具体被配置为：
    根据所述刷新率F和公式
    Figure PCTCN2021081883-appb-100001
    计算得到所述调整系数K；
    其中，
    Figure PCTCN2021081883-appb-100002
    为所述默认刷新率对应的平均光透过率，tr为所述显示屏的响应时间，A为预设系数。
  5. 根据权利要求3所述的设备，所述调整系数确定子单元具体被配置为：
    根据所述刷新率和预设的刷新率与调整系数的对应关系，确定所述调整系数。
  6. 根据权利要求1至5任一项所述的设备，所述刷新率监控单元具体被配置为：
    根据所述待显示的视频数据中的每个视频帧对应的场同步信号，确定所述刷新率。
  7. 一种显示的控制方法，包括：
    获取待显示的视频数据对应的刷新率；
    根据所述刷新率，生成背光控制信号；其中，不同刷新率对应的背光控制信号的占空比不同，所述背光控制信号用于驱动显示屏的背光光源。
  8. 根据权利要求7所述的方法，所述根据所述刷新率，生成背光控制信号，包括：
    根据所述刷新率，确定调整系数；
    根据所述调整系数，对默认的背光控制信号的占空比进行调整，并根据调整后的占空比，生成所述刷新率对应的背光控制信号；所述默认的背光控制信号为针对默认刷新率预设的控制信号。
  9. 根据权利要求8所述的方法，所述根据所述刷新率，确定调整系数，包括：
    根据所述刷新率F和公式
    Figure PCTCN2021081883-appb-100003
    计算得到所述调整系数K；
    其中，
    Figure PCTCN2021081883-appb-100004
    为所述默认刷新率对应的平均光透过率，tr为所述显示屏的响应时间，A为预设系数。
  10. 根据权利要求8所述的方法，所述根据所述刷新率，生成背光控制信号，包括：
    根据所述刷新率和预设的刷新率与调整系数的对应关系，确定所述调整系数。
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Publication number Priority date Publication date Assignee Title
US20240013700A1 (en) * 2020-08-11 2024-01-11 Lg Electronics Inc. Image display device and operating method therefor
US11972723B2 (en) * 2020-08-21 2024-04-30 Google Llc Maintaining luminance when refresh rate changes
CN114141207B (zh) * 2021-12-14 2023-04-18 深圳市康冠科技股份有限公司 一种恒流背光器及平衡电感

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070146300A1 (en) * 2005-12-23 2007-06-28 Innolux Display Corp. Liquid crystal display and driving method thereof for adjusting refresh rate and luminance according to that of ambient light
US20080049006A1 (en) * 2006-08-28 2008-02-28 Au Optronics Corporation Display and power saving apparatus and method thereof
CN103390389A (zh) * 2012-05-09 2013-11-13 冠捷投资有限公司 液晶显示装置、面板驱动装置及控制电路
CN103606356A (zh) * 2013-11-06 2014-02-26 深圳市华星光电技术有限公司 一种液晶显示装置及其背光驱动方法
CN105825821A (zh) * 2016-05-18 2016-08-03 青岛海信电器股份有限公司 背光源的控制方法、背光源的控制装置和液晶显示屏
CN108335677A (zh) * 2018-02-11 2018-07-27 京东方科技集团股份有限公司 亮度补偿方法、亮度补偿装置、以及显示装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI232070B (en) * 2003-02-27 2005-05-01 Chi Mei Optoelectronics Corp Device and method to dynamically adjust the burst mode switching frequency for LCD
CN100358002C (zh) * 2003-02-27 2007-12-26 奇美电子股份有限公司 用于液晶显示器的非连续模态开关频率值动态调整的装置及方法
JP2005316298A (ja) * 2004-04-30 2005-11-10 Nec Lcd Technologies Ltd 液晶表示装置、該液晶表示装置に用いられる光源駆動回路及び光源駆動方法
KR100854840B1 (ko) * 2005-08-31 2008-08-27 엘지전자 주식회사 액정표시기의 인버터 전류 제어 장치
CN101018281A (zh) * 2006-02-09 2007-08-15 瑞轩科技股份有限公司 具防谐振干扰功能的电视及其背光模组
JP2016161633A (ja) * 2015-02-27 2016-09-05 京セラドキュメントソリューションズ株式会社 操作パネルの製造装置、操作パネル、表示装置、操作パネルの製造方法、表示装置の表示方法
TWI582750B (zh) * 2016-06-30 2017-05-11 晨星半導體股份有限公司 應用於顯示器的背光控制及影像補償方法與相關的控制電路
US10643555B2 (en) * 2016-09-23 2020-05-05 Apple Inc. Internal gamma correction for electronic displays
CN111128082B (zh) * 2019-12-31 2022-03-01 惠州视维新技术有限公司 背光调节方法、显示器及存储介质

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070146300A1 (en) * 2005-12-23 2007-06-28 Innolux Display Corp. Liquid crystal display and driving method thereof for adjusting refresh rate and luminance according to that of ambient light
US20080049006A1 (en) * 2006-08-28 2008-02-28 Au Optronics Corporation Display and power saving apparatus and method thereof
CN103390389A (zh) * 2012-05-09 2013-11-13 冠捷投资有限公司 液晶显示装置、面板驱动装置及控制电路
CN103606356A (zh) * 2013-11-06 2014-02-26 深圳市华星光电技术有限公司 一种液晶显示装置及其背光驱动方法
CN105825821A (zh) * 2016-05-18 2016-08-03 青岛海信电器股份有限公司 背光源的控制方法、背光源的控制装置和液晶显示屏
CN108335677A (zh) * 2018-02-11 2018-07-27 京东方科技集团股份有限公司 亮度补偿方法、亮度补偿装置、以及显示装置

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