WO2021204105A1 - 一种显示亮度调整方法及相关装置 - Google Patents

一种显示亮度调整方法及相关装置 Download PDF

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Publication number
WO2021204105A1
WO2021204105A1 PCT/CN2021/085590 CN2021085590W WO2021204105A1 WO 2021204105 A1 WO2021204105 A1 WO 2021204105A1 CN 2021085590 W CN2021085590 W CN 2021085590W WO 2021204105 A1 WO2021204105 A1 WO 2021204105A1
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Prior art keywords
brightness
average pixel
pixel level
display
image
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PCT/CN2021/085590
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English (en)
French (fr)
Inventor
张秀峰
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华为技术有限公司
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Priority to EP21783869.7A priority Critical patent/EP4120230A4/en
Priority to JP2022560324A priority patent/JP2023520701A/ja
Priority to US17/917,392 priority patent/US20230154396A1/en
Publication of WO2021204105A1 publication Critical patent/WO2021204105A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • 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
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/0606—Manual adjustment
    • 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
    • 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
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/023—Power management, e.g. power saving using energy recovery or conservation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness

Definitions

  • This application relates to the field of display technology, and in particular to a display brightness adjustment method and related devices.
  • HDR high-dynamic range
  • HDG hybrid log-gamma
  • Dolby Vision HDR10+
  • HDR display has also become a key feature of display devices such as TVs, monitors, tablets, and mobile phones.
  • the highest peak brightness agreed in the international standard is 10,000 nits.
  • the dynamic range of brightness is 0-4000nit.
  • the peak brightness of the best liquid crystal display (LCD) TV is about 4000nit, and the best organic light-emitting diode (OLED)
  • the peak brightness of a TV is about 1000nit
  • the peak brightness of display devices such as monitors, tablets, smartphones, and mobile phones is about 1000nit.
  • the requirements for the brightness of black and white in the HDR standard have become more stringent.
  • OLED has self-luminous characteristics and does not require a backlight, so the OLED screen can individually light up any smallest display unit. OLED can be close to a pure black state when it is not emitting light, but as the lighting area and brightness increase, the power consumption will increase accordingly.
  • the OLED screen is equipped with a corresponding peak lightness curve (PLC) at the factory, and the peak brightness of the lighted display area is determined according to the average pixel level (APL). For example, when the APL is at 100%, the peak brightness of the display screen can be about 200 nits, and as the APL decreases, the peak brightness can be gradually increased to about 1000 nits.
  • PLC peak lightness curve
  • the brightness adjustment of display screens is based on a user-set brightness gain value multiplied by the peak brightness curve to obtain a dimming curve, and the brightness gain value is less than or equal to 1. Then, according to the APL in each frame, and the dimming curve, the display brightness of the display is adjusted. In this way, the display brightness of the display screen at different APLs will be discounted, and the contrast of the display screen of the HDR video will be greatly reduced, making the display effect of the HDR video worse.
  • the present application provides a display brightness adjustment method and related devices, which can ensure that when the APL is low, the effect of lowering the brightness on the contrast is small, and the high contrast effect of the image brightness of the HDR display is ensured.
  • the present application provides a display brightness adjustment method, including: an electronic device acquires an image to be displayed.
  • the electronic device calculates the average pixel level of the image to be displayed.
  • the electronic device determines the actual display brightness value corresponding to the average pixel level of the image to be displayed through the peak brightness curve of the display screen.
  • the electronic device determines the actual display brightness value corresponding to the average pixel level of the image to be displayed according to the first dimming curve.
  • the electronic device determines the actual display brightness value corresponding to the average pixel level of the image to be displayed through the second dimming curve .
  • the peak brightness curve, the first dimming curve and the second dimming curve are different from each other.
  • the first average pixel level is smaller than the second average pixel level.
  • the electronic device adjusts the display brightness of the image to be displayed according to the actual display brightness value.
  • the display screen when the APL of the image to be displayed is in the low APL segment, the display screen can use the peak brightness corresponding to the APL as the display brightness to display the image to be displayed.
  • the display screen is made to use the peak brightness corresponding to the APL multiplied by the brightness gain value as the actual display brightness to display the image to be displayed.
  • the display brightness of the display screen is increased with the increase of the APL, from the peak brightness to the brightness value after the peak brightness is multiplied by the brightness gain value.
  • the method before the electronic device acquires the image to be displayed, the method further includes: the electronic device acquires a brightness gain value, where the brightness gain value is less than or equal to 1.
  • the electronic device determines the first dimming curve according to the brightness gain value and the peak brightness curve.
  • the method before the electronic device acquires the image to be displayed, the method further includes: the electronic device acquires a brightness gain value, where the brightness gain value is less than or equal to 1.
  • the electronic device determines the second dimming curve according to the preset first average pixel level, the preset second average pixel level, the brightness gain value, and the peak brightness curve.
  • acquiring the brightness gain value by the electronic device specifically includes: the electronic device receiving the brightness adjustment value input by the user.
  • the electronic device determines the brightness gain value according to the brightness adjustment value and the brightness adjustment range.
  • acquiring the brightness gain value by the electronic device specifically includes: the electronic device detecting environmental brightness.
  • the electronic device determines the brightness gain value corresponding to the detected environmental brightness from the corresponding relationship between the environmental brightness and the brightness gain.
  • the electronic device adjusts the display brightness of the image to be displayed according to the actual display brightness value, which specifically includes: the electronic device determines the corresponding drive current value according to the actual display brightness value.
  • the electronic device displays the image to be displayed, the input driving current of the display screen is adjusted according to the driving current value.
  • the corresponding display brightness value on the first dimming curve is less than or equal to the corresponding peak brightness value on the peak brightness curve.
  • the display brightness value on the second dimming curve is inversely related to the average pixel level.
  • the display brightness value corresponding to the first average pixel level on the second dimming curve is the same as the peak brightness value corresponding to the first average pixel level on the peak brightness curve.
  • the display brightness value corresponding to the second average pixel level on the second dimming curve is the same as the peak brightness value corresponding to the second average pixel level on the first dimming curve.
  • the display screen is a self-luminous display screen.
  • the types of the display include: organic light-emitting diode OLED display, active matrix organic light-emitting diode AMOLED display, quantum dot light-emitting diode QLED display.
  • the formula for determining the first dimming curve by the electronic device is:
  • Y(x) is the corresponding brightness value on the first dimming curve when the average pixel level of the image to be displayed is x.
  • x is the average pixel level of the image to be displayed, 0 ⁇ x ⁇ 1.
  • PLC(x) is the corresponding peak brightness value on the peak brightness curve when the average pixel level of the image to be displayed is x.
  • Gain is the brightness gain value, where 0 ⁇ Gain ⁇ 1.
  • the formula for determining the second dimming curve by the electronic device is:
  • F(x) alpha(x)*Gain*PLC(x)+(1-alpha(x))*PLC(x).
  • F(x) is the corresponding brightness value on the second dimming curve when the average pixel level of the image to be displayed is x.
  • x is the average pixel level of the image to be displayed, x1 ⁇ x ⁇ x2, x1 ⁇ x2.
  • PLC(x) is the corresponding brightness value on the peak brightness curve when the average pixel level of the image to be displayed is x.
  • Gain is the brightness gain value, where 0 ⁇ Gain ⁇ 1.
  • alpha(x) is the ratio of the difference between the average pixel level of the image to be displayed and the first average pixel level to the difference between the first average pixel level and the second average pixel level.
  • x1 is the preset first average pixel level
  • x2 is the preset second average pixel level.
  • the electronic device may be a television.
  • the present application provides a display brightness adjustment method, which is characterized by comprising: obtaining a brightness gain value by an electronic device, wherein the brightness gain value is less than or equal to 1.
  • the electronic device determines the third dimming curve according to the brightness gain value, the peak brightness curve of the display screen, the preset first average pixel level and the preset second average pixel level.
  • the electronic device acquires the image to be displayed.
  • the electronic device calculates the average pixel level in the image to be displayed.
  • the electronic device determines the actual display brightness value corresponding to the average pixel level of the image to be displayed through the third dimming curve.
  • the electronic device adjusts the display brightness of the image to be displayed according to the actual display brightness value.
  • the display screen when the APL of the image to be displayed is in the low APL segment, the display screen can use the peak brightness corresponding to the APL as the display brightness to display the image to be displayed.
  • the display screen is made to use the peak brightness corresponding to the APL multiplied by the brightness gain value as the actual display brightness to display the image to be displayed.
  • the display brightness of the display screen is increased with the increase of the APL, from the peak brightness to the brightness value after the peak brightness is multiplied by the brightness gain value.
  • the electronic device determines the third dimming curve according to the brightness gain value, the peak brightness curve of the display screen, the preset first average pixel level and the preset second average pixel level Specifically, the electronic device determines the first dimming curve according to the brightness gain value and the peak brightness curve. The electronic device determines a second dimming curve according to the first average pixel level, the second average pixel level, the brightness gain value, and the peak brightness curve. The electronic device determines the third dimming curve according to the first dimming curve, the second dimming curve, the first average pixel level, and the second average pixel level.
  • acquiring the brightness gain value by the electronic device specifically includes: the electronic device receiving the brightness adjustment value input by the user.
  • the electronic device determines the brightness gain value according to the brightness adjustment value and the brightness adjustment range.
  • acquiring the brightness gain value by the electronic device specifically includes: the electronic device detecting environmental brightness.
  • the electronic device determines the brightness gain value corresponding to the detected environmental brightness from the corresponding relationship between the environmental brightness and the brightness gain.
  • the electronic device adjusts the display brightness of the image to be displayed according to the actual display brightness value, which specifically includes: the electronic device determines the corresponding drive current value according to the actual display brightness value.
  • the electronic device displays the image to be displayed, the input driving current of the display screen is adjusted according to the driving current value.
  • the corresponding display brightness value on the first dimming curve is less than or equal to the corresponding peak brightness value on the peak brightness curve.
  • the display brightness value on the second dimming curve is inversely related to the average pixel level.
  • the display brightness value corresponding to the first average pixel level on the second dimming curve is the same as the peak brightness value corresponding to the first average pixel level on the peak brightness curve.
  • the display brightness value corresponding to the second average pixel level on the second dimming curve is the same as the peak brightness value corresponding to the second average pixel level on the first dimming curve.
  • the display screen is a self-luminous display screen.
  • the types of the display include: organic light-emitting diode OLED display, active matrix organic light-emitting diode AMOLED display, quantum dot light-emitting diode QLED display.
  • the formula for determining the first dimming curve by the electronic device is:
  • Y(x) is the corresponding brightness value on the first dimming curve when the average pixel level of the image to be displayed is x.
  • x is the average pixel level of the image to be displayed, 0 ⁇ x ⁇ 1.
  • PLC(x) is the corresponding peak brightness value on the peak brightness curve when the average pixel level of the image to be displayed is x.
  • Gain is the brightness gain value, where 0 ⁇ Gain ⁇ 1.
  • the formula for determining the second dimming curve by the electronic device is:
  • F(x) alpha(x)*Gain*PLC(x)+(1-alpha(x))*PLC(x).
  • F(x) is the corresponding brightness value on the second dimming curve when the average pixel level of the image to be displayed is x.
  • x is the average pixel level of the image to be displayed, x1 ⁇ x ⁇ x2, x1 ⁇ x2.
  • PLC(x) is the corresponding brightness value on the peak brightness curve when the average pixel level of the image to be displayed is x.
  • Gain is the brightness gain value, where 0 ⁇ Gain ⁇ 1.
  • alpha(x) is the ratio of the difference between the average pixel level of the image to be displayed and the first average pixel level to the difference between the first average pixel level and the second average pixel level.
  • x1 is the preset first average pixel level
  • x2 is the preset second average pixel level.
  • the formula for determining the third dimming curve by the electronic device is:
  • L(x) is the corresponding brightness value on the third dimming curve when the average pixel level of the image to be displayed is x.
  • PLC(x) is the corresponding brightness value on the peak brightness curve when the average pixel level of the image to be displayed is x.
  • Y(x) is the corresponding brightness value on the first dimming curve when the average pixel level of the image to be displayed is x.
  • F(x) is the corresponding brightness value on the second dimming curve when the average pixel level of the image to be displayed is x.
  • x is the average pixel level of the image to be displayed.
  • x1 is the preset first average pixel level
  • x2 is the preset second average pixel level
  • the electronic device is a television.
  • the present application provides a display device including: one or more processors, a display screen, and one or more memories.
  • the one or more memories and the display screen are coupled with one or more processors, and the one or more memories are used to store computer program codes.
  • the computer program codes include computer instructions.
  • the display device is caused to execute the display brightness adjustment method in any one of the possible implementation manners of any one of the foregoing aspects.
  • the display device may be an application processor.
  • the display device may be a television.
  • the present application provides a computer storage medium, including computer instructions, which when the computer instructions run on a display device, cause the display device to execute the display brightness adjustment method in any one of the possible implementations of any of the above aspects.
  • the embodiments of the present application provide a computer program product, which when the computer program product runs on a computer, causes the computer to execute the display brightness adjustment method in any one of the possible implementation manners of any of the foregoing aspects.
  • the present application provides a display device, including: one or more functional modules, the one or more functional modules are used to execute the method for adjusting the brightness of the display device in any one of the possible implementations of any of the above aspects .
  • FIG. 1 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • FIG. 2 is a schematic structural diagram of a display panel provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of a peak brightness curve provided by an embodiment of the application.
  • FIG. 4 is a schematic diagram of a dimming curve of a dimming method in the prior art
  • FIG. 5 is a schematic flowchart of a display brightness adjustment method provided in an embodiment of the application.
  • FIG. 6 is a schematic diagram of a dimming curve of a display brightness adjustment method provided in an embodiment of the application.
  • FIG. 7 is a schematic diagram of a display system provided in an embodiment of the application.
  • first and second are only used for descriptive purposes, and cannot be understood as implying or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present application, unless otherwise specified, “multiple” The meaning is two or more.
  • the embodiment of the present application provides a display brightness adjustment method.
  • the display screen uses the peak brightness corresponding to the APL as the display brightness to display the image to be displayed.
  • the display screen uses the peak brightness corresponding to the APL multiplied by the brightness gain value as the actual display brightness to display the image to be displayed.
  • the display brightness of the display screen is increased with the increase of the APL, from the peak brightness to the brightness value after the peak brightness is multiplied by the brightness gain value.
  • the electronic device may be a display device, a display device, or the like.
  • the electronic device uses a display device as an example to describe a display brightness adjustment method provided in an embodiment of the present application.
  • the following describes a schematic structural diagram of a display device 100 provided by the present application.
  • the display device 100 may include a processor 111, a memory 112, a wireless communication processing module 113, a power switch 114, a display screen 115, an audio module 116, and a speaker 117.
  • the processor 111 may include one or more processing units.
  • the processor 111 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), and an image signal.
  • AP application processor
  • GPU graphics processing unit
  • ISP image signal processor
  • controller memory
  • video codec digital signal processor
  • DSP digital signal processor
  • baseband processor baseband processor
  • NPU neural-network processing unit
  • the controller may be the nerve center and command center of the display device 100.
  • the controller can generate operation control signals according to the instruction operation code and timing signals to complete the control of fetching instructions and executing instructions.
  • a memory may also be provided in the processor 110 to store instructions and data.
  • the memory in the processor 110 is a cache memory.
  • the memory can store instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to use the instruction or data again, it can be directly called from the memory. Repeated accesses are avoided, the waiting time of the processor 110 is reduced, and the efficiency of the system is improved.
  • the memory 112 is coupled with the processor 111, and is used to store various software programs and/or multiple sets of instructions.
  • the memory 112 may be used to store computer executable program code, where the executable program code includes instructions.
  • the processor 111 executes various functional applications and data processing of the display device 100 by running instructions stored in the memory 112.
  • the memory 112 may include a program storage area and a data storage area.
  • the storage program area can store an operating system, an application program (such as a sound playback function, an image playback function, etc.) required by at least one function, and the like.
  • the data storage area can store data created during the use of the display device 100 (such as audio data, image data to be displayed, etc.) and the like.
  • the memory 112 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash storage (UFS), and the like.
  • UFS universal flash storage
  • the wireless communication module 113 can provide applications on the display device 100 including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), and global navigation satellites.
  • WLAN wireless local area networks
  • Wi-Fi wireless fidelity
  • BT bluetooth
  • global navigation satellites System (global navigation satellite system, GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (infrared, IR) and other wireless communication solutions.
  • the wireless communication processing module 113 may include a Bluetooth (BT) communication processing module 113A and a WLAN communication processing module 113B.
  • BT Bluetooth
  • WLAN communication processing module 113B can monitor signals transmitted by other devices, such as detection requests, scan signals, etc., and can send response signals, such as detection responses, Scan response, etc., so that other devices can discover the display device 100, establish a wireless communication connection with other devices, and communicate with other devices through one or more wireless communication technologies in Bluetooth or WLAN.
  • the Bluetooth (BT) communication processing module 113A can provide solutions including one or more of Bluetooth communication in classic Bluetooth (BR/EDR) or Bluetooth low energy (Bluetooth low energy, BLE).
  • the WLAN communication processing module 113B may include one or more WLAN communication solutions among Wi-Fi direct, Wi-Fi LAN, or Wi-Fi soft AP.
  • the power switch 114 can be used to control the power supply to the display device 100 from the power source. In some embodiments, the power switch 114 can be used to control the external power supply to supply power to the display device 100.
  • the display device 100 may further include a battery, a charging management module, and a power management module.
  • the battery can be used to provide power to the display device 100.
  • the charging management module is used to receive charging input from the charger.
  • the charger can be a wireless charger or a wired charger.
  • the charging management module may receive the charging input of the wired charger through the USB interface.
  • the charging management module may receive the wireless charging input through the wireless charging coil of the display device 100. While the charging management module charges the battery, it can also supply power to the electronic device through the power management module.
  • the power management module is used to connect the battery, the charging management module and the processor 111.
  • the power management module receives input from the battery and/or charging management module, and supplies power to the processor 111, the memory 112, the display screen 115, and the wireless communication module 113.
  • the power management module can also be used to monitor battery capacity, battery cycle times, battery health status (leakage, impedance) and other parameters.
  • the power management module may also be provided in the processor 111.
  • the power management module and the charging management module may also be provided in the same device.
  • the display screen 115 can be used to display images, videos, etc.
  • the display screen 115 includes a display panel.
  • the display panel adopts a self-luminous display panel.
  • OLED organic light-emitting diode
  • AMOLED active-matrix organic light-emitting diode
  • QLED quantum dot light-emitting diode
  • the display device 100 may include one or N display screens 194, and N is a positive integer greater than one.
  • the display panel of the display device 100 may be illustrated as an OLED panel.
  • the OLED panel includes a glass base layer 211, an anode 212, a hole injection layer 213, an organic light emitting layer 214, an electron transport layer 215, and a cathode 216.
  • the glass base layer 211 is transparent and can be used to support the entire OLED panel.
  • the anode 212 is transparent, and the anode 212 can eliminate electrons and increase electron holes when current flows.
  • the hole injection layer 213 is composed of organic material molecules and is used to transport electron holes from the anode 216.
  • the organic light-emitting layer 214 is made of organic material and is used for light emission.
  • the electron transport layer 215 is composed of organic material molecules and is used to transport electrons from the cathode 216.
  • the cathode 216 When the cathode 216 is passed by current, the cathode 216 injects electrons into the electron transport layer 215. Wherein, when the current is driven so that both ends of the anode 212 and the cathode 216 reach a certain voltage, the electrons and holes generated by the anode 212 and the electrons generated by the cathode 216 will be combined in the organic light-emitting layer to generate light. Among them, due to the different types of organic material molecules in the organic light-emitting layer 214, three primary colors of red, green, and blue (RGB) can be generated to form the basic colors.
  • RGB red, green, and blue
  • red, green, blue and white can be generated to form the basic colors.
  • RGBW red, green, blue and white
  • Each light-emitting unit in the OLED panel can be individually lit, and light of different colors is generated due to the different organic material molecules of the organic light-emitting layer in the light-emitting unit.
  • each display pixel in the OLED panel can include red, green, and blue organic light-emitting units.
  • the ratio of the injected current values of the red, green, and blue light-emitting units in the display pixel you can Adjust the display color of the display pixel.
  • each display pixel in the OLED panel may include red, green, blue, and white light-emitting units.
  • the display color of the display pixel can be adjusted.
  • the injection currents of the red, green, blue, and white light-emitting units in the adjusted display pixel are all 0, the display pixel can be displayed as black.
  • the driving current of the OLED panel the screen display brightness of the OLED panel can be adjusted.
  • the audio module 116 can be used to convert a digital audio signal into an analog audio signal for output, and can also be used to convert an analog audio input into a digital audio signal.
  • the audio module 116 can also be used to encode and decode audio signals.
  • the audio module 116 may be installed in the processor 111, or part of the functional modules of the audio module 116 may be installed in the processor 111.
  • the audio module 116 can transmit audio signals to the wireless communication module 113 through a bus interface (for example, a UART interface, etc.), so as to realize the function of playing audio signals through a Bluetooth speaker.
  • a bus interface for example, a UART interface, etc.
  • the speaker 117 can be used to convert the audio signals sent by the audio modules 1 and 6 into sound signals.
  • the display device 100 may also include a microphone, which is also a "microphone” or “microphone”, for converting sound signals into electrical signals.
  • a microphone which is also a "microphone” or “microphone”, for converting sound signals into electrical signals.
  • the user can speak through the human mouth and input the sound signal into the microphone.
  • the display device 100 may also include a wired local area network (local area network, LAN) communication processing module, a high definition multimedia interface (HDMI) communication processing module, and a communication serial bus (universal serial bus). , USB) communication processing module.
  • the wired LAN communication processing module can be used to communicate via a wired LAN and through other devices in a LAN, and can also be used to connect to a WAN via a wired LAN, and can communicate with devices in the WAN.
  • the HDMI communication processing module can be used to communicate with other devices through the HDMI interface.
  • the HDMI communication processing module can receive HDR video data sent by the set-top box through the HDMI interface, and so on.
  • the USB communication processing module can be used to communicate with other devices through a USB interface.
  • the OLED screen is equipped with a corresponding peak brightness curve (PLC) at the factory, and the peak brightness of the lighted display area is determined according to the average pixel level (APL).
  • PLC peak brightness curve
  • APL average pixel level
  • the average pixel level can be used to represent the ratio of the average pixel brightness of the image to be displayed to the maximum pixel brightness in the image to be displayed.
  • FIG. 3 exemplarily shows a peak brightness curve of the display screen.
  • the horizontal axis of the peak brightness curve represents the average pixel level (APL), and the vertical axis represents the display brightness of the display screen.
  • APL average pixel level
  • the peak brightness of the display screen is 400nit.
  • the peak brightness of the display area is 900 nit.
  • the peak brightness of the display screen decreases as the APL increases.
  • the display device may multiply the peak brightness curve according to the brightness gain value set by the user to obtain the dimming curve.
  • the specific adjustment method is shown in the following formula (1):
  • P(x) is the brightness value of the image to be displayed on the display screen when the average pixel level of the image to be displayed is x;
  • x is the average pixel level (APL) of the image to be displayed, 0 ⁇ x ⁇ 1;
  • PLC(x) is the peak brightness of the display screen when the average pixel level of the image to be displayed is x;
  • Gain is the brightness gain value set by the user, where 0 ⁇ Gain ⁇ 1.
  • FIG. 4 shows a dimming curve of the display screen.
  • the user-set brightness gain value Gain can be 0.5, therefore, under the same APL, the brightness value on the dimming curve is converted to half of the value of the peak brightness curve.
  • the brightness gain value set by the user is 0.5, when the APL of the image to be displayed is 10%, the peak brightness value of the display screen is 900nit, and the brightness value of the image to be displayed on the display screen is 450nit;
  • the APL is 70%
  • the peak brightness value of the display screen is 400 nit
  • the brightness value of the image to be displayed on the display screen is 200 nit.
  • the brightness adjustment of the display screen in the prior art directly multiplies the brightness gain value set by the user by the peak curve to obtain the dimming curve of the actual display brightness. Then, according to the APL of the image to be displayed and the actual display brightness curve, the display brightness when the display screen displays the image to be displayed is adjusted. In this way, it will cause the display brightness of the display to be discounted under different APLs, reducing the contrast of the picture, and reducing the playback effect of HDR video.
  • the embodiments of the present application provide a display brightness adjustment method, which can realize that when the APL of the image to be displayed is in the low APL segment, the display screen uses the peak brightness corresponding to the APL as the display brightness, and displays the display brightness.
  • the image to be displayed When the APL of the image to be displayed is in the high APL segment, the display screen is made to use the peak brightness corresponding to the APL multiplied by the brightness gain value as the actual display brightness to display the image to be displayed.
  • the display brightness of the display screen is increased with the increase of the APL, from the peak brightness to the brightness value after the peak brightness is multiplied by the brightness gain value.
  • the following describes a display brightness adjustment method provided in an embodiment of the present application.
  • FIG. 5 exemplarily shows a schematic diagram of a display brightness adjustment method provided by an embodiment of the present application. As shown in Figure 5, the method includes:
  • the display device obtains a brightness gain value, where the brightness gain value is a non-negative number less than or equal to 1.
  • the brightness gain value can be set by the user.
  • the display device may display a brightness adjustment bar, and a slider may be displayed on the brightness adjustment bar.
  • the display device can receive a user's sliding operation on the slider, and in response to the sliding operation, the display device can determine the brightness gain value according to the position of the slider on the brightness adjustment bar and the length of the brightness adjustment bar.
  • the display device may use the ratio of the distance from the position of the slider on the brightness adjustment bar to the first end (for example, the leftmost end) of the brightness adjustment bar to the length of the brightness adjustment bar as the brightness gain value. For example, after the user slides the slider and the slider is in the middle position of the brightness adjustment bar, the display device can determine that the brightness gain value is 0.5.
  • the display device may receive the brightness adjustment value input by the user, and the display device may determine the brightness gain value according to the brightness adjustment value input by the user and the length of the brightness adjustment range, where the brightness gain value is the brightness adjustment value The ratio to the length of the brightness adjustment range. For example, if the brightness adjustment value input by the user is 50 and the brightness adjustment range is 0-100, that is, if the length of the brightness adjustment range is 100, the brightness gain value is 0.5.
  • the display device may also determine the brightness gain value corresponding to the detected environment brightness from the corresponding relationship between the environment brightness and the brightness gain value according to the detected environment brightness.
  • the display device can adjust the brightness of the display screen by using the brightness gain value corresponding to the detected environmental brightness. Among them, the brighter the environment in which the display device is located, the larger the brightness gain value used by the display device.
  • the display device determines from the corresponding relationship between the ambient brightness and the brightness gain value that the brightness gain value corresponding to the 1000 lux ambient brightness is 0.8, and when the display device changes from The corresponding relationship between the ambient brightness and the brightness gain value determines that the brightness gain value corresponding to the 500 lux is 0.4.
  • the display device determines a first dimming curve according to the brightness gain value and the peak brightness curve of the display screen.
  • the display device may multiply the peak brightness values corresponding to all APLs on the peak brightness curve by the brightness gain value to obtain the first dimming curve.
  • the calculation formula of the first dimming curve can be as follows:
  • Y(x) is the corresponding brightness value on the first dimming curve when the average pixel level of the image to be displayed is x;
  • x is the average pixel level of the image to be displayed, 0 ⁇ x ⁇ 1 ;
  • PLC(x) is the peak brightness value of the display screen when the average pixel level of the image to be displayed is x;
  • Gain is the brightness gain value, where 0 ⁇ Gain ⁇ 1.
  • the display brightness value of the first dimming curve is half of the peak brightness value on the peak curve.
  • the peak brightness value on the peak brightness curve is 900 nit
  • the display brightness value on the first dimming curve is 450 nit.
  • the peak brightness value on the peak brightness curve is 400 nit
  • the display brightness value on the first dimming curve is 200 nit.
  • the display device determines a second dimming curve according to the first average pixel level (APL), the second average pixel level (APL), the brightness gain value, and the peak brightness curve.
  • the first APL is smaller than the second APL.
  • the first APL and the second APL are thresholds preset by the user or the system of the display device.
  • the display brightness value on the second dimming curve is inversely related to the APL, that is, the display brightness value on the second dimming curve decreases as the APL increases.
  • the display brightness value corresponding to the first APL on the second dimming curve is the same as the peak brightness value corresponding to the first APL on the peak brightness curve.
  • the display brightness value corresponding to the second APL on the second dimming curve is the same as the peak brightness value corresponding to the first APL on the first dimming curve.
  • the corresponding display brightness of the APL of the image to be displayed on the second dimming curve is less than that of the APL of the image to be displayed on the peak brightness curve. Peak brightness value.
  • the display device can use the following formula (3) and formula (4) according to the first average pixel level (APL), the second average pixel level (APL), the brightness gain value, and the peak brightness curve. Determine the second dimming curve.
  • the formula (3) and formula (4) can be as follows:
  • F(x) is the corresponding brightness value on the second dimming curve when the average pixel level of the image to be displayed is x;
  • x is the average pixel level of the image to be displayed (APL), x1 ⁇ x ⁇ x2, x1 ⁇ x2;
  • PLC(x) is the corresponding brightness value on the peak brightness curve when the average pixel level of the image to be displayed is x;
  • Gain is the brightness gain value, where 0 ⁇ Gain ⁇ 1; alpha(x) is the ratio of the difference between the average pixel level x of the image to be displayed and the first APL, and the difference between the first APL and the second APL;
  • x1 is the first APL, and x2 is the second APL.
  • the first APL may be 10% (that is, 0.1)
  • the second APL may be 70% (that is, 0.7)
  • the brightness gain value is 0.5.
  • the display device can determine the second dimming curve according to the first APL, the second APL, the brightness gain value, and the peak brightness curve according to the above formula (3) and formula (4).
  • the display brightness value on the second dimming curve is 900 nit.
  • the display brightness value on the second dimming curve is 200 nit.
  • the first APL and the second APL may have other values, which are not limited here.
  • the above formula (3) and formula (4) are only one possible implementation manner and should not constitute a limitation.
  • other formulas or algorithms can be used to determine the second dimming curve based on the first average pixel level (APL), the second average pixel level (APL), the brightness gain value, and the peak brightness curve.
  • the display device acquires an image to be displayed.
  • the display device may obtain the to-be-displayed image from the to-be-displayed video data, and the to-be-displayed image is a picture of each frame in the video data.
  • the display device is playing a segment of HDR video, and the display device can parse the HDR video data to parse the next frame as the image to be displayed.
  • the image to be displayed may also be a picture selected by the user.
  • the display device may respond to the detected display operation of an HDR picture by the user, the display device may obtain the HDR picture locally or on the network, and use the HDR picture as the image to be displayed.
  • the display device calculates an average pixel-level APL of the image to be displayed.
  • the image to be displayed can be converted into image information (such as RGB data).
  • the image information includes the display of each color in each pixel when the display screen displays the image to be displayed.
  • the color value of the cell When the color value of all color display units in a pixel is 0, it means that the pixel is not lit and displayed as pure black.
  • the display device can calculate the ratio of the average pixel brightness of the image to be displayed to the maximum pixel brightness (that is, the APL of the image to be displayed) from the image information.
  • the average pixel brightness of the image to be displayed may be 125, and the maximum pixel brightness may be 250.
  • the display device can then calculate that the APL of the image to be displayed is 50%.
  • the display device determines the actual display brightness value of the image to be displayed according to the peak brightness curve and the APL of the image to be displayed.
  • the first APL may be 10%
  • the second APL may be 70%
  • the APL of the image to be displayed is 5%. Since the APL of the image to be displayed (for example, 5%) is smaller than the first APL (for example, 10%), the display device can determine the corresponding peak value when the APL of the displayed image is 5% according to the peak brightness curve (PLC)
  • the brightness value is 980nit
  • the peak brightness value 980nit is used as the actual display brightness value of the image to be displayed.
  • the display device determines the actual display brightness value of the image to be displayed according to the first dimming curve and the APL of the image to be displayed.
  • the first APL may be 10%
  • the second APL may be 70%
  • the APL of the image to be displayed is 80%. Since the APL of the image to be displayed (for example, 50%) is smaller than the second APL (for example, 70%), the display device can determine the corresponding brightness value when the APL of the displayed image is 80% according to the first dimming curve It is 200nit, and the brightness value of 200nit is used as the actual display brightness value of the image to be displayed.
  • the first dimming curve It is 200nit
  • the brightness value of 200nit is used as the actual display brightness value of the image to be displayed.
  • the first APL may be 10%
  • the second APL may be 70%
  • the APL of the image to be displayed is 50%. Since the APL (for example, 50%) of the image to be displayed is between the first APL (for example, 10%) and the second APL (for example, 50%), the display device can determine the When the APL of the displayed image is 50%, the corresponding brightness value is 300nit, and the brightness value 300nit is used as the actual display brightness value of the image to be displayed.
  • the above examples are only used to explain the application and should not constitute a limitation.
  • the display device uses the actual display brightness value to display the image to be displayed.
  • the display device determines the actual display brightness value, it can determine the corresponding driving current value according to the actual display brightness value, and input the driving current to the display screen according to the driving current value.
  • the display device may determine the third dimming curve according to the brightness gain value, the peak brightness curve of the display screen, the preset first average pixel level and the preset second average pixel level.
  • the display device can determine the first dimming curve according to the brightness gain value and the peak brightness curve.
  • the display device determines a second dimming curve according to the first average pixel level, the second average pixel level, the brightness gain value, and the peak brightness curve.
  • the display device determines a third dimming curve according to the first dimming curve, the second dimming curve, the first average pixel level, and the second average pixel level.
  • the display device can determine the actual display brightness value according to the average pixel level of the image to be displayed and the third dimming curve.
  • the first dimming curve can refer to the above display device.
  • the third dimming curve can be determined by the following formula .
  • L(x) is the corresponding brightness value on the third dimming curve when the average pixel level of the image to be displayed is x;
  • PLC(x) is the brightness corresponding to the peak brightness curve when the average pixel level of the image to be displayed is x
  • Y(x) is the corresponding brightness value on the first dimming curve when the average pixel level of the image to be displayed is x;
  • F(x) is the average pixel level of the image to be displayed is x, the first The corresponding brightness value on the second dimming curve;
  • x is the average pixel level of the image to be displayed;
  • x1 is the first average pixel level,
  • x2 is the second average pixel level, x1 ⁇ x2.
  • the embodiment of the present application provides a display brightness adjustment method, which can realize that when the APL of the image to be displayed is in the low APL segment, the display screen uses the peak brightness corresponding to the APL as the realization display brightness to display the image to be displayed.
  • the display screen is made to use the peak brightness corresponding to the APL multiplied by the brightness gain value as the actual display brightness to display the image to be displayed.
  • the display brightness of the display screen is increased with the increase of the APL, from the peak brightness to the brightness value after the peak brightness is multiplied by the brightness gain value.
  • the display device may have multiple display modes (for example, bright mode, standard mode, and soft mode), and different display modes correspond to different peak brightness curves.
  • the display device can determine the peak brightness curve corresponding to the first display mode according to the set first display mode, and determine the first dimming curve according to the peak brightness curve and the brightness gain value corresponding to the first display mode .
  • the display device can determine the actual display brightness value of the image to be displayed according to the peak brightness curve corresponding to the first display mode and the APL of the image to be displayed. In this way, no matter which display mode the display device is in, it can be achieved at low APL to reduce the impact of lowering the brightness on the picture contrast, and improve the high-contrast effect of the picture brightness of the HDR display.
  • FIG. 7 shows a schematic diagram of a display system 700 provided in an embodiment of the present application.
  • the above-mentioned display device 100 may include the display system 700.
  • the display system 700 may include a display panel 701 and a processing module 702.
  • the processing module 702 may include an application processor and a display driver chip.
  • the display panel 701 may be a self-luminous display panel, such as an OLED display panel, an AMOLED display panel, a QLED display panel, etc.
  • the processing module 702 can be used to obtain a brightness gain value, where the brightness gain value is a non-negative number less than or equal to 1.
  • the processing module 702 can also be used to determine the first dimming curve according to the brightness gain value and the peak brightness curve of the display screen. Wherein, the peak brightness curve is stored in the display device when the display device leaves the factory. Under the same APL, the display brightness value of the first dimming curve is less than or equal to the peak brightness value on the peak curve.
  • the processing module 702 can also be used to determine the second dimming curve according to the first average pixel level (APL), the second average pixel level (APL), the brightness gain value and the peak brightness curve.
  • the first APL is smaller than the second APL.
  • the first APL and the second APL are thresholds preset by the user or the system of the display device.
  • the display brightness value on the second dimming curve is inversely related to the APL, that is, the display brightness value on the second dimming curve decreases as the APL increases.
  • the display brightness value corresponding to the first APL on the second dimming curve is the same as the peak brightness value corresponding to the first APL on the peak brightness curve.
  • the display brightness value corresponding to the second APL on the second dimming curve is the same as the peak brightness value corresponding to the first APL on the first dimming curve.
  • the corresponding display brightness of the APL of the image to be displayed on the second dimming curve is less than that of the APL of the image to be displayed on the peak brightness curve. Peak brightness value.
  • the processing module 702 can also be used to obtain images to be displayed.
  • the processing module 702 can also be used to calculate the average pixel-level APL of the image to be displayed.
  • the processing module 702 can also be used to determine the actual display brightness value of the image to be displayed according to the peak brightness curve and the APL of the image to be displayed when the APL of the image to be displayed is less than the first average pixel level.
  • the processing module 702 can also be used to determine the actual display brightness value of the image to be displayed according to the first dimming curve and the APL of the image to be displayed when the APL of the image to be displayed is greater than the second average pixel level.
  • the processing module 702 can also be used to determine the actual display brightness value of the image to be displayed according to the second curve when the APL of the image to be displayed is between the first average pixel level and the second average pixel level.
  • the processing module 702 can also be used to control the display panel 701 to display the image to be displayed with the actual display brightness value.
  • the processing module 702 includes an application processor and a display driver chip.
  • the application processor may determine the third dimming curve according to the brightness gain value, the peak brightness curve of the display screen, the preset first average pixel level and the preset second average pixel level. Wherein, first, the application processor may determine the first dimming curve according to the brightness gain value and the peak brightness curve. Then, the application processor determines a second dimming curve according to the first average pixel level, the second average pixel level, the brightness gain value, and the peak brightness curve. Then, the application processor determines a third dimming curve according to the first dimming curve, the second dimming curve, the first average pixel level, and the second average pixel level.
  • the display driving chip can determine the actual display brightness value according to the average pixel level of the image to be displayed and the third dimming curve sent by the application processor after calculating the average pixel level of the image to be displayed.
  • the display driving chip may determine the corresponding driving current value according to the actual display brightness value after determining the actual display brightness value, and input the driving current to the display panel 701 according to the driving current value.
  • the display screen when the APL of the image to be displayed is in the low APL range, the display screen can use the peak brightness corresponding to the APL as the realization display brightness to display the image to be displayed.
  • the display screen is made to use the peak brightness corresponding to the APL multiplied by the brightness gain value as the actual display brightness to display the image to be displayed.
  • the display brightness of the display screen is increased with the increase of the APL, from the peak brightness to the brightness value after the peak brightness is multiplied by the brightness gain value.

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Abstract

本申请公开了一种显示亮度调整方法，包括：电子装置获取亮度增益值，其中，亮度增益值小于或等于1。电子装置根据亮度增益值、显示屏的峰值亮度曲线、预设的第一平均像素级和预设的第二平均像素级，确定出第三调光曲线。电子装置获取待显示图像。电子装置计算待显示图像中的平均像素级APL。电子装置通过第三调光曲线，确定出待显示图像的平均像素级对应的实际显示亮度值。电子装置根据所述实际显示亮度值，调整所述待显示图像的显示亮度。这样，可以保证在低APL时，调低亮度对对比度的影响小，保证HDR显示的画面亮度高对比度效果。

Description

一种显示亮度调整方法及相关装置
本申请要求于2020年04月08日提交中国专利局、申请号为202010270705.0、申请名称为“一种显示亮度调整方法及相关装置”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
本申请涉及显示器技术领域，尤其涉及一种显示亮度调整方法及相关装置。
背景技术
目前，随着高动态范围(high-dynamic range，HDR)10标准的订立，HDR10、混合对数伽马(hybrid log-gamma，HLG)、杜比视界(Dolby Vision)、HDR10+等各种HDR标准陆续得到推广和应用。HDR显示也成为电视、显示器、平板、手机等显示设备的关键特性。
其中，HDR显示有一个重要指标，是峰值亮度，国际标准中约定的最高显示峰值亮度是10000尼特(nit)，但由于材料、屏幕制造工艺和供电功耗等因素的限制，屏幕实际片源的亮度动态范围在0-4000nit，例如，现有最好的液晶显示屏(liquid crystal display，LCD)电视的峰值亮度在4000nit左右，现有最好的有机发光二极管(organic light-emitting diode，OLED)电视的峰值亮度在1000nit左右，显示器、平板电脑、智能手机、手机等显示设备的峰值亮度大概在1000nit左右。为了完美的呈现图像信息，HDR标准中对于黑与白的亮度要求愈趋严格。OLED具有自发光的特性，不需要背光源，因此OLED屏幕可以单独点亮任意最小显示单元。OLED可以不发光的时候接近于纯黑态，但是随着点亮区域以及亮度的增加，功耗也会相应提升。为了避免功耗过大，OLED屏幕在出厂时都会配备对应的峰值亮度曲线(peak lightness curve，PLC)，依照平均像素级(average pixel level，APL)不同，决定点亮显示区域的峰值亮度。例如，当APL在100％时，该显示屏的峰值亮度可以在200nit左右，随着APL的降低，峰值亮度可逐步提升至1000nit左右。
现有技术中，对OLED屏等显示屏的亮度调节，是根据用户设置的亮度增益值与该峰值亮度曲线相乘得到调光曲线，该亮度增益值小于或等于1。然后，会根据每一帧画面中的APL，和调光曲线，调节显示屏的显示亮度。这样，会导致不同APL时的显示屏的显示亮度都被打折，HDR视频的显示画面对比度会大幅下降，使得HDR视频的显示效果变差。
发明内容
本申请提供了一种显示亮度调整方法及相关装置，可以保证在低APL时，调低亮度对对比度的影响小，保证HDR显示的画面亮度高对比度效果。
第一方面，本申请提供了一种显示亮度调整方法，包括：电子装置获取待显示图像。该电子装置计算该待显示图像的平均像素级。当该待显示图像的平均像素级小于第一平均像素级时，该电子装置通过显示屏的峰值亮度曲线确定出该待显示图像的平均像素级对应的实际显示亮度值。当该待显示图像的平均像素级大于第二平均像素级时，该电子装置通过第一调光曲线确定出该待显示图像的平均像素级对应的实际显示亮度值。当该待显示图像的平均像素级在第一平均像素级与第二平均像素级之间时，该电子装置通过第二调光曲 线确定出该待显示图像的平均像素级对应的实际显示亮度值。其中，该峰值亮度曲线、该第一调光曲线与该第二调光曲线各不相同。该第一平均像素级小于该第二平均像素级。该电子装置根据该实际显示亮度值，调整该待显示图像的显示亮度。
通过本申请提供的一种显示亮度调整方法，可以实现在待显示图像的APL处于低APL段时，使显示屏以该APL对应的峰值亮度作为实现显示亮度，显示该待显示图像。在待显示图像的APL处于高APL段时，使显示屏以该APL对应的峰值亮度乘以亮度增益值后的亮度值作为实际显示亮度，显示该待显示图像。在待显示图像的APL处于中APL段时，使显示屏的显示亮度随着APL的增大，从峰值亮度过渡到峰值亮度乘以亮度增益值后的亮度值。这样，可以实现减小在低APL时因调低亮度对画面对比度影响，提高了HDR显示的画面亮度高对比度效果，同时，也使得在高APL时，画面显示亮度偏低，减少了对用户眼睛的刺激。
在一种可能的实现方式中，在该电子装置获取待显示图像之前，该方法还包括：该电子装置获取亮度增益值，其中，该亮度增益值小于或等于1。该电子装置根据该亮度增益值以及该峰值亮度曲线，确定出第一调光曲线。
在一种可能的实现方式中，在该电子装置获取待显示图像之前，该方法还包括：该电子装置获取亮度增益值，其中，该亮度增益值小于或等于1。该电子装置根据预设的第一平均像素级、预设的第二平均像素级、该亮度增益值和该峰值亮度曲线，确定出该第二调光曲线。
在一种可能的实现方式中，该电子装置获取亮度增益值，具体包括：该电子装置接收用户输入的亮度调整值。该电子装置根据该亮度调整值和亮度调整范围，确定出该亮度增益值。
在一种可能的实现方式中，该电子装置获取亮度增益值，具体包括：该电子装置检测环境亮度。该电子装置从环境亮度与亮度增益的对应关系中，确定出检测到的该环境亮度对应的该亮度增益值。
在一种可能的实现方式中，该电子装置根据该实际显示亮度值，调整该待显示图像的显示亮度，具体包括：该电子装置根据该实际显示亮度值确定出对应的驱动电流值。该电子装置在显示该待显示图像时，根据该驱动电流值调整该显示屏的输入驱动电流。
在一种可能的实现方式中，在同一平均像素级时，该第一调光曲线上对应的显示亮度值小于或等于该峰值亮度曲线上对应的峰值亮度值。
在一种可能的实现方式中，该第二调光曲线上的显示亮度值与平均像素级反相关。该第二调光曲线上该第一平均像素级对应的显示亮度值，与该峰值亮度曲线上该第一平均像素级对应的峰值亮度值相同。该第二调光曲线上该第二平均像素级对应的显示亮度值，与该第一调光曲线上该第二平均像素级对应的峰值亮度值相同。
在一种可能的实现方式中，该显示屏为自发光式显示屏。其中，该显示屏的类型包括：有机发光二极管OLED显示屏、主动矩阵有机发光二极体AMOLED显示屏、量子点发光二极管QLED显示屏。
在一种可能的实现方式中，该电子装置确定出该第一调光曲线的公式为：
Y(x)＝Gain*PLC(x)。
其中，Y(x)为该待显示图像的平均像素级为x时，该第一调光曲线上对应的亮度值。x为该待显示图像的平均像素级，0<x≤1。PLC(x)为在该待显示图像的平均像素级为x时，该峰值亮度曲线上对应的峰值亮度值。Gain为该亮度增益值，其中，0<Gain≤1。
在一种可能的实现方式中，该电子装置确定出该第二调光曲线的公式为：
F(x)＝alpha(x)*Gain*PLC(x)+(1-alpha(x))*PLC(x)。
alpha(x)＝(x-x1)/(x2-x1)。
其中，F(x)为该待显示图像的平均像素级为x时，该第二调光曲线上对应的亮度值。x为该待显示图像的平均像素级，x1≤x≤x2，x1<x2。PLC(x)为该待显示图像的平均像素级为x时，该峰值亮度曲线上对应的亮度值。Gain为该亮度增益值，其中，0<Gain≤1。alpha(x)为该待显示图像的平均像素级和该第一平均像素级之差，与该第一平均像素级和该第二平均像素级之差的比值。x1为预设的该第一平均像素级，x2为预设的该第二平均像素级。
在一种可能的实现方式中，该电子装置可以为电视机。
第二方面，本申请提供了一种显示亮度调整方法，其特征在于，包括：电子装置获取亮度增益值，其中，该亮度增益值小于或等于1。该电子装置根据该亮度增益值、显示屏的峰值亮度曲线、预设的第一平均像素级和预设的第二平均像素级，确定出第三调光曲线。该电子装置获取待显示图像。该电子装置计算该待显示图像中的平均像素级。该电子装置通过该第三调光曲线，确定出该待显示图像的平均像素级对应的实际显示亮度值。该电子装置根据该实际显示亮度值，调整该待显示图像的显示亮度。
通过本申请提供的一种显示亮度调整方法，可以实现在待显示图像的APL处于低APL段时，使显示屏以该APL对应的峰值亮度作为实现显示亮度，显示该待显示图像。在待显示图像的APL处于高APL段时，使显示屏以该APL对应的峰值亮度乘以亮度增益值后的亮度值作为实际显示亮度，显示该待显示图像。在待显示图像的APL处于中APL段时，使显示屏的显示亮度随着APL的增大，从峰值亮度过渡到峰值亮度乘以亮度增益值后的亮度值。这样，可以实现减小在低APL时因调低亮度对画面对比度影响，提高了HDR显示的画面亮度高对比度效果，同时，也使得在高APL时，画面显示亮度偏低，减少了对用户眼睛的刺激。
在一种可能的实现方式中，该电子装置根据该亮度增益值、显示屏的峰值亮度曲线、预设的第一平均像素级和预设的第二平均像素级，确定出第三调光曲线，具体包括：该电子装置根据该亮度增益值以及该峰值亮度曲线，确定出第一调光曲线。该电子装置根据该第一平均像素级、该第二平均像素级、该亮度增益值和该峰值亮度曲线，确定出第二调光曲线。该电子装置根据该第一调光曲线、该第二调光曲线、该第一平均像素级和该第二平均像素级，确定出该第三调光曲线。
在一种可能的实现方式中，该电子装置获取亮度增益值，具体包括：该电子装置接收用户输入的亮度调整值。该电子装置根据该亮度调整值和亮度调整范围，确定出该亮度增益值。
在一种可能的实现方式中，该电子装置获取亮度增益值，具体包括：该电子装置检测 环境亮度。该电子装置从环境亮度与亮度增益的对应关系中，确定出检测到的该环境亮度对应的该亮度增益值。
在一种可能的实现方式中，该电子装置根据该实际显示亮度值，调整该待显示图像的显示亮度，具体包括：该电子装置根据该实际显示亮度值确定出对应的驱动电流值。该电子装置在显示该待显示图像时，根据该驱动电流值调整该显示屏的输入驱动电流。
在一种可能的实现方式中，在同一平均像素级时，该第一调光曲线上对应的显示亮度值小于或等于该峰值亮度曲线上对应的峰值亮度值。
在一种可能的实现方式中，该第二调光曲线上的显示亮度值与平均像素级反相关。该第二调光曲线上该第一平均像素级对应的显示亮度值，与该峰值亮度曲线上该第一平均像素级对应的峰值亮度值相同。该第二调光曲线上该第二平均像素级对应的显示亮度值，与该第一调光曲线上该第二平均像素级对应的峰值亮度值相同。
在一种可能的实现方式中，该显示屏为自发光式显示屏。其中，该显示屏的类型包括：有机发光二极管OLED显示屏、主动矩阵有机发光二极体AMOLED显示屏、量子点发光二极管QLED显示屏。
在一种可能的实现方式中，该电子装置确定出该第一调光曲线的公式为：
Y(x)＝Gain*PLC(x)。
其中，Y(x)为该待显示图像的平均像素级为x时，该第一调光曲线上对应的亮度值。x为该待显示图像的平均像素级，0<x≤1。PLC(x)为在该待显示图像的平均像素级为x时，该峰值亮度曲线上对应的峰值亮度值。Gain为该亮度增益值，其中，0<Gain≤1。
在一种可能的实现方式中，该电子装置确定出该第二调光曲线的公式为：
F(x)＝alpha(x)*Gain*PLC(x)+(1-alpha(x))*PLC(x)。
alpha(x)＝(x-x1)/(x2-x1)。
其中，F(x)为该待显示图像的平均像素级为x时，该第二调光曲线上对应的亮度值。x为该待显示图像的平均像素级，x1≤x≤x2，x1<x2。PLC(x)为该待显示图像的平均像素级为x时，该峰值亮度曲线上对应的亮度值。Gain为该亮度增益值，其中，0<Gain≤1。alpha(x)为该待显示图像的平均像素级和该第一平均像素级之差，与该第一平均像素级和该第二平均像素级之差的比值。x1为预设的该第一平均像素级，x2为预设的该第二平均像素级。
在一种可能的实现方式中，该电子装置确定出该第三调光曲线的公式为：
L(x)＝PLC(x)，x<x1。
L(x)＝F(x)，x1≤x≤x2。
L(x)＝Y(x)，x>x2。
其中，L(x)为该待显示图像的平均像素级为x时，该第三调光曲线上对应的亮度值。PLC(x)为该待显示图像的平均像素级为x时，该峰值亮度曲线上对应的亮度值。Y(x)为该待显示图像的平均像素级为x时，该第一调光曲线上对应的亮度值。F(x)为该待显示图像的平均像素级为x时，该第二调光曲线上对应的亮度值。x为该待显示图像的平均像素级。x1为预设的该第一平均像素级，x2为预设的该第二平均像素级，x1<x2。
在一种可能的实现方式中，该电子装置为电视机。
第三方面，本申请提供了一种显示装置，包括：一个或多个处理器、显示屏和一个或多个存储器。该一个或多个存储器、该显示屏与一个或多个处理器耦合，一个或多个存储器用于存储计算机程序代码，计算机程序代码包括计算机指令，当一个或多个处理器执行计算机指令时，使得显示装置执行上述任一方面任一项可能的实现方式中的显示亮度调整方法。
在一种可能的实现方式中，该显示装置可以为应用处理器。
在一种可能的实现方式中，该显示装置可以为电视机。
第四方面，本申请提供了一种计算机存储介质，包括计算机指令，当计算机指令在显示设备上运行时，使得显示设备执行上述任一方面任一项可能的实现方式中的显示亮度调整方法。
第五方面，本申请实施例提供了一种计算机程序产品，当计算机程序产品在计算机上运行时，使得计算机执行上述任一方面任一项可能的实现方式中的显示亮度调整方法。
第六方面，本申请提供了一种显示设备，包括：一个或多个功能模块，该一个或多个功能模块用于执行上述任一方面任一项可能的实现方式中的显示设备亮度调整方法。
附图说明
图1为本申请实施例提供的一种显示设备的结构示意图；
图2为本申请实施例提供的一种显示面板的结构示意图；
图3为本申请实施例提供的一种峰值亮度曲线的示意图；
图4为现有技术中的调光方法的调光曲线示意图；
图5为本申请实施例中提供的一种显示亮度调整方法的流程示意图；
图6为本申请实施例中提供的一种显示亮度调整方法的调光曲线示意图；
图7为本申请实施例中提供的一种显示系统的示意图。
具体实施方式
下面将结合附图对本申请实施例中的技术方案进行清除、详尽地描述。其中，在本申请实施例的描述中，除非另有说明，“/”表示或的意思，例如，A/B可以表示A或B；文本中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，另外，在本申请实施例的描述中，“多个”是指两个或多于两个。
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为暗示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征，在本申请实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
本申请实施例提供了一种显示亮度调整方法，电子装置可以实现在待显示图像的APL处于低APL段时，使显示屏以该APL对应的峰值亮度作为实现显示亮度，显示该待显示图像。在待显示图像的APL处于高APL段时，使显示屏以该APL对应的峰值亮度乘以亮 度增益值后的亮度值作为实际显示亮度，显示该待显示图像。在待显示图像的APL处于中APL段时，使显示屏的显示亮度随着APL的增大，从峰值亮度过渡到峰值亮度乘以亮度增益值后的亮度值。这样，可以实现减小在低APL时因调低亮度对画面对比度影响，提高了HDR显示的画面亮度高对比度效果，同时，也使得在高APL时，画面显示亮度偏低，减少了对用户眼睛的刺激。
在本申请实施例中，电子装置可以为显示设备、显示装置等。其中，在本申请的下述实施例中，电子装置以显示设备为例，对本申请实施例提供的一种显示亮度调整方法进行说明。
下面介绍本申请提供的一种显示设备100的结构示意图。
如图1所示，显示设备100可以包括处理器111，存储器112，无线通信处理模块113，电源开关114，显示屏115，音频模块116，扬声器117。
其中，处理器111可以包括一个或多个处理单元，例如：处理器111可以包括应用处理器(application processor，AP)，调制解调处理器，图形处理器(graphics processing unit，GPU)，图像信号处理器(image signal processor，ISP)，控制器，存储器，视频编解码器，数字信号处理器(digital signal processor，DSP)，基带处理器，和/或神经网络处理器(neural-network processing unit，NPU)等。其中，不同的处理单元可以是独立的器件，也可以集成在一个或多个处理器中。
其中，控制器可以是显示设备100的神经中枢和指挥中心。控制器可以根据指令操作码和时序信号，产生操作控制信号，完成取指令和执行指令的控制。
处理器110中还可以设置存储器，用于存储指令和数据。在一些实施例中，处理器110中的存储器为高速缓冲存储器。该存储器可以保存处理器110刚用过或循环使用的指令或数据。如果处理器110需要再次使用该指令或数据，可从所述存储器中直接调用。避免了重复存取，减少了处理器110的等待时间，因而提高了系统的效率。
存储器112与处理器111耦合，用于存储各种软件程序和/或多组指令。存储器112可以用于存储计算机可执行程序代码，所述可执行程序代码包括指令。处理器111通过运行存储在存储器112的指令，从而执行显示设备100的各种功能应用以及数据处理。存储器112可以包括存储程序区和存储数据区。其中，存储程序区可存储操作系统，至少一个功能所需的应用程序(比如声音播放功能，图像播放功能等)等。存储数据区可存储显示设备100使用过程中所创建的数据(比如音频数据，待显示的图像数据等)等。此外，存储器112可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件，闪存器件，通用闪存存储器(universal flash storage，UFS)等。
无线通信模块113可以提供应用在显示设备100上的包括无线局域网(wireless local area networks，WLAN)(如无线保真(wireless fidelity，Wi-Fi)网络)，蓝牙(bluetooth，BT)，全球导航卫星系统(global navigation satellite system，GNSS)，调频(frequency modulation，FM)，近距离无线通信技术(near field communication，NFC)，红外技术(infrared，IR)等无线通信的解决方案。
在一些实施例中，无线通信处理模块113可以包括蓝牙(BT)通信处理模块113A、WLAN通信处理模块113B。蓝牙(BT)通信处理模块113A、WLAN通信处理模块113B中的一项或多项可以监听到其他设备)发射的信号，如探测请求、扫描信号等等，并可以发送响应信号，如探测响应、扫描响应等，使得其他设备可以发现显示设备100，并与其他设备建立无线通信连接，通过蓝牙或WLAN中的一种或多种无线通信技术与其他设备进行通信。其中，蓝牙(BT)通信处理模块113A可以提供包括经典蓝牙(BR/EDR)或蓝牙低功耗(Bluetooth low energy，BLE)中一项或多项蓝牙通信的解决方案。WLAN通信处理模块113B可以包括Wi-Fi direct、Wi-Fi LAN或Wi-Fi softAP中一项或多项WLAN通信的解决方案。
电源开关114，可用于控制电源向显示设备100的供电。在一些实施例中，电源开关114可用于控制外部电源对显示设备100的供电。
在一些实施例中，该显示设备100还可以包括电池、充电管理模块、电源管理模块。电池可以用于为显示设备100提供电源。充电管理模块用于从充电器接收充电输入。其中，充电器可以是无线充电器，也可以是有线充电器。在一些有线充电的实施例中，充电管理模块可以通过USB接口接收有线充电器的充电输入。在一些无线充电的实施例中，充电管理模块可以通过显示设备100的无线充电线圈接收无线充电输入。充电管理模块为电池充电的同时，还可以通过电源管理模块为电子设备供电。电源管理模块用于连接电池，充电管理模块与处理器111。电源管理模块接收电池和/或充电管理模块的输入，为处理器111，存储器112，显示屏115和无线通信模块113等供电。电源管理模块还可以用于监测电池容量，电池循环次数，电池健康状态(漏电，阻抗)等参数。在其他一些实施例中，电源管理模块也可以设置于处理器111中。在另一些实施例中，电源管理模块和充电管理模块也可以设置于同一个器件中。
显示屏115，可用于显示图像，视频等。显示屏115包括显示面板。在本申请实施例中，显示面板采用自发光式显示面板。例如，有机发光二极管(organic light-emitting diode，OLED)，有源矩阵有机发光二极体或主动矩阵有机发光二极体(active-matrix organic light emitting diode的，AMOLED)，量子点发光二极管(quantum dot light emitting diodes，QLED)等。在一些实施例中，显示设备100可以包括1个或N个显示屏194，N为大于1的正整数。
在本申请实施例中，显示设备100的显示面板可以示例性的以OLED面板进行说明。
如图2所示，该OLED面板包括有玻璃基层211、阳极212、空穴注射层213、有机发光层214、电子传输层215、阴极216。其中，该玻璃基层211为透明的，可用于支撑整个OLED面板。阳极212为透明的，该阳极212在电流流过时可以消除电子，增加电子空穴。空穴注射层213由有机材料分子构成，用于传输阳极216而来的电子空穴。该有机发光层214由有机材料构成，用于发光。该电子传输层215由有机材料分子构成，用于传输由阴极216而来的电子。阴极216在由电流通过时，阴极216会将电子注入到电子传输层215中。其中，当电流驱动使得阳极212和阴极216的两端达到一定电压时，阳极212产生的电子空穴与阴极216产生的电子就会在有机发光层中结合，产生光亮。其中，有机发光层214中因有机材料分子的类型不同，可以产生红、绿和蓝(RGB)三原色，构成基本色彩。在一些实施例中，有机发光层214中因有机材料分子的类型不同，可以产生红、绿、蓝和 白(RGBW)四种颜色，构成基本色彩。OLED面板中的每个发光单元都能够被单独点亮，因发光单元中有机发光层的有机材料分子不同，而产生不同颜色的光。
其中，有机发光层213发光的亮度取决于发光材料的性能以及在阳极212和阴极216上施加电流的大小，在阴阳两级施加的电流越大，有机发光层213发光的亮度就越高。因此，OLED面板中的每一个显示像素点都可以包括有红色、绿色、蓝色的有机发光单元，通过调整显示像素点中红色、绿色和蓝色的发光单元的注入电流值的比例，就可以调整该显示像素点的显示颜色。或者，OLED面板中的每一个显示像素点都可以包括有红色、绿色、蓝色和白色的发光单元。通过调整显示像素点中红色、绿色、蓝色和白色的发光单元的注入电流值的比例，就可以调整该显示像素点的显示颜色。当调整显示像素点中红色、绿色、蓝色和白色的发光单元的注入电流都为0时，该显示像素点可以显示为黑色。通过调整OLED面板的驱动电流，就可以调整OLED面板的画面显示亮度。
音频模块116，可用于将数字音频信号转换成模拟音频信号输出，也可用于将模拟音频输入转换为数字音频信号。音频模块116还可以用于对音频信号编码和解码。在一些实施例中，音频模块116可以设置与处理器111中，或将音频模块116的部分功能模块设置与处理器111中。音频模块116可以通过总线接口(例如UART接口，等等)向无线通信模块113传递音频信号，实现通过蓝牙音箱播放音频信号的功能。
扬声器117，可以用于将音频模块1,6的发送的音频信号转换为声音信号。
在一些实施例中，显示设备100还可以包括有麦克风，也成“话筒”，“传声器”，用于将声音信号转换为电信号。当发生语音控制指令时，用户可以通过人嘴发声，将声音信号输入到麦克风。
在一些实施例中，显示设备100还可以包括有线局域网(local area network，LAN)通信处理模块，高清晰度多媒体接口(high definition multimedia interface，HDMI)通信处理模块，通信串行总线(universal serial bus，USB)通信处理模块。该有线LAN通信处理模块可用于通过有线LAN和通过一个LAN中的其他设备进行通信，还可用于通过有线LAN连接到WAN，可与WAN中的设备通信。该HDMI通信处理模块可用于通过HDMI接口与其他设备进行通信。例如，HDMI通信处理模块可以通过HDMI接口接收机顶盒发送的HDR视频数据，等等。该USB通信处理模块可用于通过USB接口与其他设备进行通信。
目前，由于OLED等自发光式的屏幕可以不发光的时候接近于纯黑态，但是随着点亮区域以及亮度的增加，功耗也会相应提升。为了避免功耗过大，OLED屏幕在出厂时都会配备对应的峰值亮度曲线(PLC)，依照平均像素级(average pixel level，APL)不同，决定点亮显示区域的峰值亮度。其中，平均像素级可用于表示待显示图像的平均像素亮度与待显示图像中最大像素亮度的比值。
请参照图3，图3示例性的示出了显示屏的一条峰值亮度曲线。如图3所示，该峰值亮度曲线的横轴表示平均像素级(APL)，纵轴表示显示屏的显示亮度。当APL大于或等于70％时，则显示屏的峰值亮度为400nit。当APL等于10％时，则显示区域的峰值亮度为900nit。当APL<＝3％时，则显示屏的峰值亮度趋近于1000nit。当APL大于10％且小于70％时，显示屏的峰值亮度随着APL的增大而降低。
现有技术中，当需要对显示屏幕的实际显示亮度进行调节时，显示设备可以根据用户设置的亮度增益值与该峰值亮度曲线相乘得到调光曲线。具体调节方法如下公式(1)所示：
P(x)＝Gain*PLC(x)公式(1)
其中，上述公式(1)中，P(x)为待显示图像的平均像素级为x时，显示屏显示该待显示图像的亮度值；x为待显示图像的平均像素级(APL)，0<x≤1；PLC(x)为在待显示图像的平均像素级为x时，显示屏的峰值亮度；Gain为用户设定的亮度增益值，其中，0<Gain≤1。
请参照图4，图4示出了显示屏的一条调光曲线。如图4所示，用户设置的亮度增益值Gain可以为0.5，因此，在同一APL下，调光曲线上的亮度值都折算为峰值亮度曲线的值的一半。例如，用户设置的亮度增益值Gain为0.5，当待显示图像的APL为10％时，显示屏的峰值亮度值为900nit，显示屏显示该待显示图像的亮度值为450nit；当待显示图像的APL为70％时，显示屏的峰值亮度值为400nit，显示屏显示该待显示图像的亮度值为200nit。
由上述内容可以看出，现有技术中的显示屏亮度调节是直接将用户设置的亮度增益值与峰值曲线相乘，得到实际显示亮度的调光曲线。然后，根据待显示图像的APL和该实际显示亮度曲线，调整显示屏显示该待显示图像时的显示亮度。这样，会导致不同APL时显示屏的显示亮度都打折，降低了画面的对比度，使得HDR视频的播放效果降低。
因此，针对上述问题，本申请实施例提供了一种显示亮度调整方法，可以实现在待显示图像的APL处于低APL段时，使显示屏以该APL对应的峰值亮度作为实现显示亮度，显示该待显示图像。在待显示图像的APL处于高APL段时，使显示屏以该APL对应的峰值亮度乘以亮度增益值后的亮度值作为实际显示亮度，显示该待显示图像。在待显示图像的APL处于中APL段时，使显示屏的显示亮度随着APL的增大，从峰值亮度过渡到峰值亮度乘以亮度增益值后的亮度值。这样，可以实现减小在低APL时因调低亮度对画面对比度影响，提高了HDR显示的画面亮度高对比度效果，同时，也使得在高APL时，画面显示亮度偏低，减少了对用户眼睛的刺激。
下面介绍本申请实施例中提供的一种显示亮度调整方法。
请参照图5，图5示例性的示出了本申请实施例提供的一种显示亮度调整方法的示意图。如图5所示，该方法包括：
S501、显示设备获取亮度增益值，其中，该亮度增益值为小于或等于1的非负数。
其中，该亮度增益值可以是用户设置的。
示例性的，显示设备可以显示出亮度调整条，该亮度调整条上可以显示有滑块。显示设备可以接收用户针对该滑块的滑动操作，响应于该滑动操作，显示设备可以根据滑块在该亮度调整条上的所在位置，以及亮度调整条长度，确定出亮度增益值。其中，显示设备可以将滑块在该亮度调整条上的所在位置到该亮度调整条第一端点(例如，最左端)的距离与该亮度调整条长度的比值，作为亮度增益值。例如，在用户滑动该滑块后，该滑块处于该亮度调整条的中间位置，则该显示设备可以确定出该亮度增益值为0.5。
又示例性的，显示设备可以接收用户输入的亮度调整值，显示设备可以根据用户输入 的亮度调整值以及亮度调整范围的长度，确定出该亮度增益值，其中，亮度增益值为该亮度调整值与该亮度调整范围的长度的比值。例如，用户输入的亮度调整值为50，亮度调整范围为0～100，即，该亮度调整范围的长度为100，则该亮度增益值为0.5。
在一种可能的实现方式中，显示设备还可以根据检测到的环境亮度，从环境亮度和亮度增益值的对应关系中，确定出检测到的环境亮度对应的亮度增益值。显示设备可以利用该检测到的环境亮度对应的亮度增益值，调节显示屏的亮度。其中，显示设备所处的环境越亮，显示设备使用的亮度增益值越大。例如，当显示设备检测到的环境亮度为1000勒克斯(lux)时，显示设备从环境亮度和亮度增益值的对应关系中确定出该1000lux的环境亮度对应的亮度增益值为0.8，当显示设备从环境亮度和亮度增益值的对应关系中确定出该500lux对应的亮度增益值为0.4。
S502、显示设备根据亮度增益值以及显示屏的峰值亮度曲线，确定第一调光曲线。
该峰值亮度曲线为该显示设备出厂时存储在该显示设备中。在同一APL下，该第一调光曲线的显示亮度值小于或等于该峰值曲线上的峰值亮度值。
其中，显示设备可以将该峰值亮度曲线上所有APL对应的峰值亮度值都与亮度增益值相乘，得到该第一调光曲线。其中，第一调光曲线的计算公式可以如下所示：
Y(x)＝Gain*PLC(x)公式(2)
上述公式(2)所示，Y(x)为待显示图像的平均像素级为x时，第一调光曲线上对应的亮度值；x为待显示图像的平均像素级，0<x≤1；PLC(x)为在待显示图像的平均像素级为x时，显示屏的峰值亮度值；Gain为亮度增益值，其中，0<Gain≤1。
示例性的，如图6所示，当亮度增益值为0.5时，在任意APL下，第一调光曲线的显示亮度值都为峰值曲线上的峰值亮度值的一半。例如，当APL为10％时，峰值亮度曲线上的峰值亮度值为900nit，第一调光曲线上的显示亮度值为450nit。当APL为70％时，峰值亮度曲线上的峰值亮度值为400nit，第一调光曲线上的显示亮度值为200nit。该示例仅仅用于解释本申请，不应构成限定。
S503、显示设备根据第一平均像素级(APL)、第二平均像素级(APL)、亮度增益值和峰值亮度曲线，确定出第二调光曲线。
其中，第一APL小于第二APL。第一APL和第二APL为用户或显示设备的系统预设的阈值。第二调光曲线上的显示亮度值与APL反相关，也即是说，第二调光曲线上的显示亮度值随着APL的增加而减小。第二调光曲线上第一APL对应的显示亮度值，与峰值亮度曲线上该第一APL对应的峰值亮度值相同。第二调光曲线上第二APL对应的显示亮度值，与第一调光曲线上该第一APL对应的峰值亮度值相同。当待显示图像的APL处于第一APL和第二APL之间时，该待显示图像的APL在第二调光曲线上对应的显示亮度小于该该待显示图像的APL在峰值亮度曲线上对应的峰值亮度值。
在一种可能的实现方式中，显示设备根据第一平均像素级(APL)、第二平均像素级(APL)、亮度增益值和峰值亮度曲线，可以以如下公式(3)和公式(4)确定出第二调光曲线。其中，该公式(3)和公式(4)可以如下所示：
F(x)＝alpha(x)*Gain*PLC(x)+(1-alpha(x))*PLC(x)公式(3)
alpha(x)＝(x-x1)/(x2-x1)公式(4)
其中，上述公式(3)和公式(4)中，F(x)为待显示图像的平均像素级为x时，第二调光曲线上对应的亮度值；x为待显示图像的平均像素级(APL)，x1≤x≤x2，x1<x2；PLC(x)为在待显示图像的平均像素级为x时，峰值亮度曲线上对应的亮度值；Gain为亮度增益值，其中，0<Gain≤1；alpha(x)为待显示图像的平均像素级x和第一APL之差，与第一APL和第二APL之差的比值；x1为第一APL，x2为第二APL。
示例性的，如图6所示，第一APL可以为10％(即0.1)，第二APL可以为70％(即0.7)，亮度增益值为0.5。显示设备根据根据第一APL、第二APL、亮度增益值和峰值亮度曲线，可以通过上述公式(3)、公式(4)确定出第二调光曲线。当待显示图像的APL为10％(即0.1)时，该第二调光曲线上的显示亮度值为900nit。当待显示图像的APL为70％(即0.7)时，该第二调光曲线上的显示亮度值为200nit。上述示例仅仅用于解释本申请，具体实现中，第一APL和第二APL可以有其他取值，在此不作限定。
本申请实施例中，上述公式(3)和公式(4)只是一种可能的实现方式中，不应构成限定。具体实现中，可以采用其他公式或算法，根据第一平均像素级(APL)、第二平均像素级(APL)、亮度增益值和峰值亮度曲线，确定出第二调光曲线。
S504、显示设备获取待显示图像。
显示设备可以从待显示的视频数据中获取到该待显示图像，该待显示图像为视频数据中的每一帧的画面。例如，显示设备正在播放一段HDR视频，显示设备可以从该HDR视频数据中解析出下一帧画面作为上述待显示图像。
在一种可能的实现方式中，该待显示的图像还可以是用户已选中的图片。例如，显示设备可以响应于检测到的用户针对一张HDR图片的显示操作，显示设备可以从本地或网络上获取到该HDR图片，并将该HDR图片作为待显示图像。
S505、显示设备计算待显示图像的平均像素级APL。
其中，显示设备获取到该待显示图像后可以将该待显示图像转换为图像信息(例如RGB数据)，该图像信息包括显示屏在显示该待显示图像时每个像素点中的每个颜色显示单元的颜色值。当像素点中所有颜色显示单元的颜色值都为0时，即表示该像素点未被点亮，显示为纯黑色。显示设备可以从图像信息中计算出该待显示图像的平均像素亮度与最大像素亮度的比值(即该待显示图像的APL)。
示例性的，例如，该待显示图像的平均像素亮度可以为125，最大像素亮度可以为250。则显示设备可以计算出该待显示图像的APL为50％。
S506、当待显示图像的APL小于第一平均像素级时，显示设备根据峰值亮度曲线和该待显示图像的APL确定该待显示图像的实际显示亮度值。
示例性的，如图6所示，例如，第一APL可以为10％，第二APL可以为70％，该待显示图像的APL为5％。由于该待显示图像的APL(例如，为5％)小于第一APL(例如，为10％)，显示设备可以根据峰值亮度曲线(PLC)确定出该显示图像的APL为5％时对应 的峰值亮度值为980nit，并将该峰值亮度值980nit作为该待显示图像的实际显示亮度值。上述示例仅仅用于解释本申请，不应构成限定。
S507、当待显示图像的APL大于第二平均像素级时，显示设备根据第一调光曲线和该待显示图像的APL确定该待显示图像的实际显示亮度值。
示例性的，如图6所示，例如，第一APL可以为10％，第二APL可以为70％，该待显示图像的APL为80％。由于该待显示图像的APL(例如，为50％)小于第二APL(例如，为70％)，显示设备可以根据第一调光曲线确定出该显示图像的APL为80％时对应的亮度值为200nit，并将亮度值200nit作为该待显示图像的实际显示亮度值。上述示例仅仅用于解释本申请，不应构成限定。
S508、当待显示图像的APL在第一平均像素级和第二平均像素级之间时，显示设备根据第二曲线确定该待显示图像的实际显示亮度值。
示例性的，如图6所示，例如，第一APL可以为10％，第二APL可以为70％，该待显示图像的APL为50％。由于该待显示图像的APL(例如，为50％)在第一APL(例如，为10％)至第二APL(例如为50％)之间，显示设备可以根据第二调光曲线确定出该显示图像的APL为50％时对应的亮度值为300nit，并将亮度值300nit作为该待显示图像的实际显示亮度值。上述示例仅仅用于解释本申请，不应构成限定。
S509、显示设备以该实际显示亮度值，显示该待显示图像。
其中，显示设备在确定出该实际显示亮度值后，可以根据该实际显示亮度值确定出对应的驱动电流值，并根据该驱动电流值，给显示屏输入驱动电流。
在一种可能的实现方式中，显示设备可以根据亮度增益值、显示屏的峰值亮度曲线、预设的第一平均像素级和预设的第二平均像素级，确定出第三调光曲线。其中，首先，显示设备可以根据亮度增益值以及所述峰值亮度曲线，确定出第一调光曲线。然后，显示设备根据所述第一平均像素级、所述第二平均像素级、所述亮度增益值和所述峰值亮度曲线，确定出第二调光曲线。接着，显示设备根据第一调光曲线、第二调光曲线、第一平均像素级和第二平均像素级，确定出第三调光曲线。接着，在显示设备计算出待显示图像的平均像素级后，显示设备可以根据待显示图像的平均像素级和第三调光曲线，确定出实际显示亮度值。
其中，第一调光曲线可以参考上述显示设备可以根据第一调光曲线、第二调光曲线、第一平均像素级和第二平均像素级，通过如下公式确定出所述第三调光曲线。
L(x)＝PLC(x)，x<x1；
L(x)＝F(x)，x1≤x≤x2；
L(x)＝Y(x)，x>x2；
其中，当x<x1时，L(x)＝PLC(x)；当x1≤x≤x2时，L(x)＝F(x)；当x>x2时，L(x)＝Y(x)。L(x)为待显示图像的平均像素级为x时，第三调光曲线上对应的亮度值；PLC(x)为待显示图像的平均像素级为x时，峰值亮度曲线上对应的亮度值；Y(x)为待显示图像的平均像素级为x时，第一调光曲线上对应的亮度值；F(x)为所述待显示图像的平均像素级为x时，所述第二调光曲线上对应的亮度值；x为待显示图像的平均像素级；x1为第一 平均像素级，x2为第二平均像素级，x1<x2。
通过本申请实施例提供了一种显示亮度调整方法，可以实现在待显示图像的APL处于低APL段时，使显示屏以该APL对应的峰值亮度作为实现显示亮度，显示该待显示图像。在待显示图像的APL处于高APL段时，使显示屏以该APL对应的峰值亮度乘以亮度增益值后的亮度值作为实际显示亮度，显示该待显示图像。在待显示图像的APL处于中APL段时，使显示屏的显示亮度随着APL的增大，从峰值亮度过渡到峰值亮度乘以亮度增益值后的亮度值。这样，可以实现减小在低APL时因调低亮度对画面对比度影响，提高了HDR显示的画面亮度高对比度效果，同时，也使得在高APL时，画面显示亮度偏低，减少了对用户眼睛的刺激。
在一种可能的实现方式中，显示设备可以有多种显示模式(例如鲜艳模式、标准模式、柔和模式)，不同的显示模式对应有不同的峰值亮度曲线。显示设备可以根据已设定的第一显示模式确定出该第一显示模式对应的峰值亮度曲线，并根据该第一显示模式对应的峰值亮度曲线和亮度增益值，确定出上述第一调光曲线。当待显示图像的APL小于第一APL时，则显示设备可以根据该第一显示模式对应的峰值亮度曲线和待显示图像的APL，确定出该待显示图像的实际显示亮度值。这样，这样，可以实现无论显示设备处于哪种显示模式，都可以实现在低APL时，减小因调低亮度对画面对比度影响，提高了HDR显示的画面亮度高对比度效果。
下面介绍本申请实施例中提供的一种显示系统。
请参见图7，图7示出了本申请实施例中提供的一种显示系统700的示意图。其中，上述显示设备100可以包括该显示系统700。
如图7所示，该显示系统700可以包括显示面板701和处理模块702。其中，该处理模块702可以包括应用处理器和显示驱动芯片。该显示面板701可以是自发光式显示面板，例如OLED显示面板、AMOLED显示面板、QLED显示面板等。
该处理模块702，可用于获取亮度增益值，其中，该亮度增益值为小于或等于1的非负数。
该处理模块702，还可用于根据亮度增益值以及显示屏的峰值亮度曲线，确定第一调光曲线。其中，该峰值亮度曲线为该显示设备出厂时存储在该显示设备中。在同一APL下，该第一调光曲线的显示亮度值小于或等于该峰值曲线上的峰值亮度值。
该处理模块702，还可用于根据第一平均像素级(APL)、第二平均像素级(APL)、亮度增益值和峰值亮度曲线，确定出第二调光曲线。
其中，第一APL小于第二APL。第一APL和第二APL为用户或显示设备的系统预设的阈值。第二调光曲线上的显示亮度值与APL反相关，也即是说，第二调光曲线上的显示亮度值随着APL的增加而减小。第二调光曲线上第一APL对应的显示亮度值，与峰值亮度曲线上该第一APL对应的峰值亮度值相同。第二调光曲线上第二APL对应的显示亮度值，与第一调光曲线上该第一APL对应的峰值亮度值相同。当待显示图像的APL处于第 一APL和第二APL之间时，该待显示图像的APL在第二调光曲线上对应的显示亮度小于该该待显示图像的APL在峰值亮度曲线上对应的峰值亮度值。
该处理模块702，还可用于获取待显示图像。
该处理模块702，还可用于计算待显示图像的平均像素级APL。
该处理模块702，还可用于当待显示图像的APL小于第一平均像素级时，根据峰值亮度曲线和该待显示图像的APL确定该待显示图像的实际显示亮度值。
该处理模块702，还可用于当待显示图像的APL大于第二平均像素级时，根据第一调光曲线和该待显示图像的APL确定该待显示图像的实际显示亮度值。
该处理模块702，还可用于当待显示图像的APL在第一平均像素级和第二平均像素级之间时，根据第二曲线确定该待显示图像的实际显示亮度值。
该处理模块702，还可用于控制上述显示面板701以该实际显示亮度值，显示该待显示图像。
在一种可能的实现方式中，处理模块702包括应用处理器和显示驱动芯片。其中，应用处理器可以根据亮度增益值、显示屏的峰值亮度曲线、预设的第一平均像素级和预设的第二平均像素级，确定出第三调光曲线。其中，首先，应用处理器可以根据亮度增益值以及所述峰值亮度曲线，确定出第一调光曲线。然后，应用处理器根据所述第一平均像素级、所述第二平均像素级、所述亮度增益值和所述峰值亮度曲线，确定出第二调光曲线。接着，应用处理器根据第一调光曲线、第二调光曲线、第一平均像素级和第二平均像素级，确定出第三调光曲线。接着，显示驱动芯片可以在计算出待显示图像的平均像素级后，可以根据待显示图像的平均像素级和应用处理器发送的第三调光曲线，确定出实际显示亮度值。该显示驱动芯片可以在确定出该实际显示亮度值后，根据该实际显示亮度值确定出对应的驱动电流值，并根据该驱动电流值，给显示面板701输入驱动电流。
具体内容可以参考上述图5所示的方法实施例，在此不再赘述。
通过本申请实施例提供的一种显示系统700，可以实现在待显示图像的APL处于低APL段时，使显示屏以该APL对应的峰值亮度作为实现显示亮度，显示该待显示图像。在待显示图像的APL处于高APL段时，使显示屏以该APL对应的峰值亮度乘以亮度增益值后的亮度值作为实际显示亮度，显示该待显示图像。在待显示图像的APL处于中APL段时，使显示屏的显示亮度随着APL的增大，从峰值亮度过渡到峰值亮度乘以亮度增益值后的亮度值。这样，可以实现减小在低APL时因调低亮度对画面对比度影响，提高了HDR显示的画面亮度高对比度效果，同时，也使得在高APL时，画面显示亮度偏低，减少了对用户眼睛的刺激。
以上所述，以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (28)

  1. 一种显示亮度调整方法，其特征在于，包括：
    电子装置获取待显示图像；
    所述电子装置计算所述待显示图像的平均像素级；
    当所述待显示图像的平均像素级小于第一平均像素级时，所述电子装置通过显示屏的峰值亮度曲线确定出所述待显示图像的平均像素级对应的实际显示亮度值；
    当所述待显示图像的平均像素级大于第二平均像素级时，所述电子装置通过第一调光曲线确定出所述待显示图像的平均像素级对应的实际显示亮度值；
    当所述待显示图像的平均像素级在第一平均像素级与第二平均像素级之间时，所述电子装置通过第二调光曲线确定出所述待显示图像的平均像素级对应的实际显示亮度值；其中，所述峰值亮度曲线、所述第一调光曲线与所述第二调光曲线各不相同；所述第一平均像素级小于所述第二平均像素级；
    所述电子装置根据所述实际显示亮度值，指示调整所述待显示图像的显示亮度。
  2. 根据权利要求1所述的方法，其特征在于，在所述电子装置获取待显示图像之前，所述方法还包括：
    所述电子装置获取亮度增益值，其中，所述亮度增益值小于或等于1；
    所述电子装置根据所述亮度增益值以及所述峰值亮度曲线，确定出第一调光曲线。
  3. 根据权利要求1所述的方法，其特征在于，在所述电子装置获取待显示图像之前，所述方法还包括：
    所述电子装置获取亮度增益值，其中，所述亮度增益值小于或等于1；
    所述电子装置根据预设的第一平均像素级、预设的第二平均像素级、所述亮度增益值和所述峰值亮度曲线，确定出所述第二调光曲线。
  4. 根据权利要求2或3所述的方法，其特征在于，所述电子装置获取亮度增益值，具体包括：
    所述电子装置接收用户输入的亮度调整值；
    所述电子装置根据所述亮度调整值和亮度调整范围，确定出所述亮度增益值。
  5. 根据权利要求2或3所述的方法，其特征在于，所述电子装置获取亮度增益值，具体包括：
    所述电子装置检测环境亮度；
    所述电子装置从环境亮度与亮度增益的对应关系中，确定出检测到的所述环境亮度对应的所述亮度增益值。
  6. 根据权利要求1所述的方法，其特征在于，所述电子装置根据所述实际显示亮度值， 指示调整所述待显示图像的显示亮度，具体包括：
    所述电子装置根据所述实际显示亮度值确定出对应的驱动电流值；
    所述电子装置根据所述确定的驱动电流值指示调整所述显示屏的输入驱动电流。
  7. 根据权利要求1所述的方法，其特征在于，在同一平均像素级时，所述第一调光曲线上对应的显示亮度值小于或等于所述峰值亮度曲线上对应的峰值亮度值。
  8. 根据权利要求1所述的方法，其特征在于，所述第二调光曲线上的显示亮度值与平均像素级反相关；所述第二调光曲线上所述第一平均像素级对应的显示亮度值，与所述峰值亮度曲线上所述第一平均像素级对应的峰值亮度值相同；所述第二调光曲线上所述第二平均像素级对应的显示亮度值，与所述第一调光曲线上所述第二平均像素级对应的峰值亮度值相同。
  9. 根据权利要求1所述的方法，其特征在于，所述显示屏为自发光式显示屏；其中，所述显示屏的类型包括：有机发光二极管OLED显示屏、主动矩阵有机发光二极体AMOLED显示屏、量子点发光二极管QLED显示屏。
  10. 根据权利要求2所述的方法，其特征在于，所述电子装置确定出所述第一调光曲线的公式为：
    Y(x)＝Gain*PLC(x)；
    其中，Y(x)为所述待显示图像的平均像素级为x时，所述第一调光曲线上对应的亮度值；x为所述待显示图像的平均像素级，0<x≤1；PLC(x)为在所述待显示图像的平均像素级为x时，所述峰值亮度曲线上对应的峰值亮度值；Gain为所述亮度增益值，其中，0<Gain≤1。
  11. 根据权利要求3所述的方法，其特征在于，所述电子装置确定出所述第二调光曲线的公式为：
    F(x)＝alpha(x)*Gain*PLC(x)+1-alpha(x))*PLC(x)；
    alpha(x)＝(x-x1)/(x2-x1)；
    其中，F(x)为所述待显示图像的平均像素级为x时，所述第二调光曲线上对应的亮度值；x为所述待显示图像的平均像素级，x1≤x≤x2，x1<x2；PLC(x)为所述待显示图像的平均像素级为x时，所述峰值亮度曲线上对应的亮度值；Gain为所述亮度增益值，其中，0<Gain≤1；alpha(x)为所述待显示图像的平均像素级和所述第一平均像素级之差，与所述第一平均像素级和所述第二平均像素级之差的比值；x1为预设的所述第一平均像素级，x2为预设的所述第二平均像素级。
  12. 一种显示亮度调整方法，其特征在于，包括：
    电子装置获取亮度增益值，其中，所述亮度增益值小于或等于1；
    所述电子装置根据所述亮度增益值、显示屏的峰值亮度曲线、预设的第一平均像素级和预设的第二平均像素级，确定出第三调光曲线；
    所述电子装置获取待显示图像；
    所述电子装置计算所述待显示图像中的平均像素级；
    所述电子装置通过所述第三调光曲线，确定出所述待显示图像的平均像素级对应的实际显示亮度值；
    所述电子装置根据所述实际显示亮度值，指示调整所述待显示图像的显示亮度。
  13. 根据权利要求12所述的方法，其特征在于，所述电子装置根据所述亮度增益值、显示屏的峰值亮度曲线、预设的第一平均像素级和预设的第二平均像素级，确定出第三调光曲线，具体包括：
    所述电子装置根据所述亮度增益值以及所述峰值亮度曲线，确定出第一调光曲线；
    所述电子装置根据所述第一平均像素级、所述第二平均像素级、所述亮度增益值和所述峰值亮度曲线，确定出第二调光曲线；
    所述电子装置根据所述第一调光曲线、所述第二调光曲线、所述第一平均像素级和所述第二平均像素级，确定出所述第三调光曲线。
  14. 根据权利要求12所述的方法，其特征在于，所述电子装置获取亮度增益值，具体包括：
    所述电子装置接收用户输入的亮度调整值；
    所述电子装置根据所述亮度调整值和亮度调整范围，确定出所述亮度增益值。
  15. 根据权利要求12所述的方法，其特征在于，所述电子装置获取亮度增益值，具体包括：
    所述电子装置检测环境亮度；
    所述电子装置从环境亮度与亮度增益的对应关系中，确定出检测到的所述环境亮度对应的所述亮度增益值。
  16. 根据权利要求12所述的方法，其特征在于，所述电子装置根据所述实际显示亮度值，指示调整所述待显示图像的显示亮度，具体包括：
    所述电子装置根据所述实际显示亮度值确定出对应的驱动电流值；
    所述电子装置根据所述确定的驱动电流值，指示调整所述显示屏的输入驱动电流。
  17. 根据权利要求13所述的方法，其特征在于，在同一平均像素级时，所述第一调光曲线上对应的显示亮度值小于或等于所述峰值亮度曲线上对应的峰值亮度值。
  18. 根据权利要求13所述的方法，其特征在于，所述第二调光曲线上的显示亮度值与平均像素级反相关；所述第二调光曲线上所述第一平均像素级对应的显示亮度值，与所述 峰值亮度曲线上所述第一平均像素级对应的峰值亮度值相同；所述第二调光曲线上所述第二平均像素级对应的显示亮度值，与所述第一调光曲线上所述第二平均像素级对应的峰值亮度值相同。
  19. 根据权利要求12所述的方法，其特征在于，所述显示屏为自发光式显示屏；其中，所述显示屏的类型包括：有机发光二极管OLED显示屏、主动矩阵有机发光二极体AMOLED显示屏、量子点发光二极管QLED显示屏。
  20. 根据权利要求13所述的方法，其特征在于，所述电子装置确定出所述第一调光曲线的公式为：
    Y(x)＝Gain*PLC(x)；
    其中，Y(x)为所述待显示图像的平均像素级为x时，所述第一调光曲线上对应的亮度值；x为所述待显示图像的平均像素级，0<x≤1；PLC(x)为在所述待显示图像的平均像素级为x时，所述峰值亮度曲线上对应的峰值亮度值；Gain为所述亮度增益值，其中，0<Gain≤1。
  21. 根据权利要求13所述的方法，其特征在于，所述电子装置确定出所述第二调光曲线的公式为：
    F(x)＝alpha(x)*Gain*PLC(x)+(1-alpha(x))*PLC(x)；
    alpha(x)＝(x-x1)/(x2-x1)；
    其中，F(x)为所述待显示图像的平均像素级为x时，所述第二调光曲线上对应的亮度值；x为所述待显示图像的平均像素级，x1≤x≤x2，x1<x2；PLC(x)为所述待显示图像的平均像素级为x时，所述峰值亮度曲线上对应的亮度值；Gain为所述亮度增益值，其中，0<Gain≤1；alpha(x)为所述待显示图像的平均像素级和所述第一平均像素级之差，与所述第一平均像素级和所述第二平均像素级之差的比值；x1为预设的所述第一平均像素级，x2为预设的所述第二平均像素级。
  22. 根据权利要求13所述的方法，其特征在于，所述电子装置确定出所述第三调光曲线的公式为：
    L(x)＝PLC(x)，x<x1；
    L(x)＝F(x)，x1≤x≤x2；
    L(x)＝Y(x)，x>x2；
    其中，L(x)为所述待显示图像的平均像素级为x时，所述第三调光曲线上对应的亮度值；PLC(x)为所述待显示图像的平均像素级为x时，所述峰值亮度曲线上对应的亮度值；Y(x)为所述待显示图像的平均像素级为x时，所述第一调光曲线上对应的亮度值；F(x)为所述待显示图像的平均像素级为x时，所述第二调光曲线上对应的亮度值；x为所述待显示图像的平均像素级；x1为预设的所述第一平均像素级，x2为预设的所述第二平均像素级，x1<x2。
  23. 根据权利要求1-22任一项所述的方法，其特征在于，所述电子装置为电视机。
  24. 根据权利要求1-22任一项所述的方法，其特征在于，所述电子装置为应用处理器。
  25. 一种显示装置，其特征在于，包括：一个或多个处理器、显示屏、一个或多个存储器；其中，所述一个或多个存储器、所述显示屏与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码，所述计算机程序代码包括计算机指令，当所述一个或多个处理器在执行所述计算机指令时，使得所述显示装置执行如权利要求1至24中任一项所述的方法。
  26. 如权利要求25所述的显示装置，所述显示装置为应用处理器。
  27. 如权利要求25所述的显示装置，所述显示装置为电视机。
  28. 一种计算机可读存储介质，包括指令，其特征在于，当所述指令在显示设备上运行时，使得所述显示设备执行如权利要求1至24中任一项所述的方法。
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