WO2020029719A1 - 一种双层液晶屏、背光亮度控制方法、装置及电子设备 - Google Patents

一种双层液晶屏、背光亮度控制方法、装置及电子设备 Download PDF

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WO2020029719A1
WO2020029719A1 PCT/CN2019/094262 CN2019094262W WO2020029719A1 WO 2020029719 A1 WO2020029719 A1 WO 2020029719A1 CN 2019094262 W CN2019094262 W CN 2019094262W WO 2020029719 A1 WO2020029719 A1 WO 2020029719A1
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Prior art keywords
displayed
image
pixel
brightness
screen
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PCT/CN2019/094262
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English (en)
French (fr)
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肖志林
陈洪波
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深圳创维－Rgb电子有限公司
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Publication of WO2020029719A1 publication Critical patent/WO2020029719A1/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
    • G09G3/34—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
    • 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
    • G09G3/3413—Details of control of colour illumination sources
    • 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
    • G09G3/36—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 using liquid crystals
    • G09G3/3607—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 using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels

Definitions

  • the embodiments of the present application relate to the technical field of LED backlight brightness control, such as a double-layer liquid crystal screen, a backlight brightness control method, a device, and an electronic device.
  • the traditional area dimming backlight module uses a backlight composed of hundreds of light-emitting diode (LED) lights instead of a cold cathode fluorescent lamp (CCFL) backlight to form each LED of the backlight.
  • the light can be adjusted according to the brightness of the image.
  • the LED light used to display the highlighted part of the image to be displayed can be adjusted to the maximum brightness, while the LED light used to display the dark part of the image to be displayed can be reduced in brightness or even turned off accordingly. Best contrast.
  • the traditional area dimming technology is prone to produce halo phenomenon at the screen where the image is bright and dark, and the display effect is not good.
  • the embodiments of the present application provide a double-layer liquid crystal screen, a method and a device for controlling the brightness of a backlight, and an electronic device, so as to improve the contrast of a display screen and avoid a halo situation in the area dimming method in the related art.
  • an embodiment of the present application provides a double-layer liquid crystal screen, which includes a display liquid crystal screen and a brightness control liquid crystal screen that are correspondingly set; wherein the brightness control liquid crystal screen includes a backlight source, an array substrate, a polarizer, and a liquid crystal.
  • the display liquid crystal screen includes an array
  • the substrate, the polarizer, the liquid crystal box, and the color filter are set to control the brightness of the light entering the display liquid crystal screen from the brightness control liquid crystal screen according to the pixel value of the image to be displayed, so as to process the image to be displayed.
  • Display; the number of the plurality of preset partitions is determined according to the total number of pixels of the image to be displayed.
  • an embodiment of the present application provides a backlight brightness control method.
  • the method is applied to the double-layer liquid crystal screen described in the first aspect, and includes: dividing an image to be displayed into a set number of images based on a preset partition. A pixel block; calculating an average brightness value of each of the pixel blocks; generating a brightness control signal of a backlight control partition matching each of the pixel blocks according to the average brightness value; and passing the brightness control based on the brightness control signal
  • the array substrate in the liquid crystal screen controls the backlight brightness of each of the pixel blocks.
  • an embodiment of the present application provides a backlight brightness control device configured on the double-layer liquid crystal screen described in the first aspect, where the double-layer liquid crystal screen includes a correspondingly arranged liquid crystal display screen and a brightness control liquid crystal screen
  • the device includes: a pixel block division module configured to divide an image to be displayed into a set number of pixel blocks based on a preset partition; a calculation module configured to calculate an average brightness value of each of the pixel blocks; a control signal generation module Is configured to generate a brightness control signal of a backlight control partition matching each of the pixel blocks according to the average brightness value; a control module is configured to control an array substrate pair in the liquid crystal screen through the brightness control based on the brightness control signal The backlight brightness of each of the pixel blocks is controlled.
  • an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the computer program as The backlight brightness control method according to the second aspect.
  • an embodiment of the present application provides a storage medium containing computer-executable instructions that, when executed by a computer processor, implement the backlight brightness control method according to the second aspect.
  • FIG. 1 is a schematic structural diagram of a double-layer liquid crystal screen according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a correspondence relationship between a preset partition of a display LCD screen and a brightness control LCD screen according to an embodiment of the present application;
  • FIG. 3 is a schematic flowchart of a backlight brightness control method according to an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a backlight brightness control method according to another embodiment of the present application.
  • FIG. 5 is a schematic flowchart of processing an image signal to be displayed according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a backlight brightness control device according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a double-layer liquid crystal screen according to an embodiment of the present application.
  • the double-layer LCD screen includes a corresponding display LCD screen 110 and a brightness control LCD screen 120, wherein the brightness control LCD screen 120 includes a backlight 121, an array substrate 122, and a polarizer 123 (the polarizer 123 includes The upper polarizer 1231 and the lower polarizer 1232) and the liquid crystal cell 124 are set to control the brightness of the incident light of the backlight 121 in each preset partition according to the average brightness of each preset partition of the plurality of preset partitions to be displayed. the size of.
  • the control voltage of the corresponding partition is generated according to the average brightness of each preset partition of the image to be displayed, and then the array substrate 122 controls the rotation of the liquid crystal molecules in the liquid crystal cell 124 by applying the control voltage, so as to control the corresponding partition.
  • the backlight 121 includes, in addition to the backlight, structures such as a reflection plate, a light guide plate, a diffusion plate, and an antireflection film. These structures are structures for converting a linear light source into a surface light source with uniform brightness.
  • the display LCD screen 110 includes an array substrate 111, a polarizer 112, (the polarizer 112 includes an upper polarizer 1121 and a lower polarizer 1122), a liquid crystal cell 113, and a color filter 114, and is set to control the Brightness, controlling the brightness of the LCD screen 120 entering the LCD screen 110 to display the image to be displayed.
  • the driving chip in the display liquid crystal screen 110 generates a driving voltage signal according to the pixel value of the image to be displayed, and sends the driving voltage signal to the array substrate 111.
  • the array substrate 111 controls the voltage in the liquid crystal cell 113 by the control voltage.
  • the liquid crystal molecules rotate to control the brightness of the light entering the display liquid crystal screen 110 from the brightness control liquid crystal screen 120, and finally the image to be displayed is displayed.
  • the number of the plurality of preset partitions is determined according to the total number of pixels of the image to be displayed.
  • the preset partition corresponding settings of the display LCD 110 and the brightness control LCD 120 are shown in detail in the display LCD 110 and the brightness control LCD shown in FIG. 2.
  • the resolution of the backlight control LCD screen that is, the brightness control LCD screen 120, may be Full High Definition (FHD), that is, 1920 * 1080.
  • FHD Full High Definition
  • the resolution of the brightness control LCD screen 120 may also be a high definition video (High Definition, HD), which is 1366 * 768, or 4K2K, etc.
  • the resolution of the display LCD 110 is not limited to 4K2K, and may be FHD or the like.
  • a double-layer LCD screen provided in this embodiment includes a correspondingly set display LCD screen and a brightness control LCD screen, wherein the brightness control LCD screen is divided into a plurality of preset partitions based on the total number of pixels of an image to be displayed, and according to the to-be-displayed
  • the average brightness control of each preset zone of the image corresponds to the size of the incident light intensity of the backlight in the zone, and then the size of the brightness from the brightness control LCD screen to the display LCD screen is controlled by the LCD screen according to the pixel value of the image to be displayed. Displaying the image to be displayed improves the contrast of the image to be displayed, makes the transition between bright and dark images of the image natural, and avoids the halo phenomenon.
  • FIG. 3 is a schematic flowchart of a backlight brightness control method according to an embodiment of the present application.
  • the backlight brightness control method disclosed in this embodiment is applied to the double-layer LCD screen of the above embodiment.
  • the method may be performed by a backlight brightness control device, where the device may be implemented by at least one of software and hardware, and is generally integrated in the terminal. Medium, such as television.
  • the method includes steps 310 to 340.
  • step 310 the image to be displayed is divided into a set number of pixel blocks based on a preset partition.
  • the resolution of the image to be displayed is 3840 * 2160
  • the resolution of the brightness control LCD screen 120 is 1920 * 1080, that is, the number of preset partitions is 1920 * 1080; then the image to be displayed is divided into 1920 * 1080 2 * 2 pixel block.
  • step 320 an average brightness value of each pixel block is calculated.
  • calculating the average brightness value of each pixel block includes:
  • Each pixel includes three sub-pixels of red, green, and blue.
  • each pixel in order to represent different color channels, each pixel is composed of a plurality of sub-pixels, and each sub-pixel loads and processes one color channel, so that each pixel displays multiple different colors.
  • the light source behind each sub-pixel can show different brightness levels, and the sub-pixel value represents the level of different brightness levels of the sub-pixel from the darkest to the brightest.
  • each pixel in a liquid crystal display includes three sub-pixels of red, green, and blue (RGB).
  • RGB red, green, and blue
  • Different sub-pixel LCDs have different sub-pixel values. For example, for an 8-bit LCD, each sub-pixel has a range of 0-255 (2 8 ).
  • step 330 a brightness control signal of a backlight control partition matching each pixel block is generated according to the average brightness value.
  • the backlight control partition matching each pixel block refers to a preset partition divided according to the total number of pixels of an image to be displayed in the double-layer LCD screen.
  • step 340 the backlight brightness of each pixel block is controlled by the array substrate in the brightness control liquid crystal screen based on the brightness control signal.
  • the brightness control signal is specifically a control voltage signal of the array substrate 122.
  • the array substrate 122 controls the rotation of the liquid crystal molecules in the liquid crystal cell 124 by applying the control voltage signal, so as to control the brightness of the incident light of the backlight 121 in the corresponding partition.
  • the backlight brightness control method divides an image to be displayed into a set number of pixel blocks according to a preset partition of the brightness control LCD screen, and generates a corresponding partition according to an average brightness value of each pixel block.
  • the backlight brightness control signal by independently controlling the backlight brightness of each pixel block, improves the brightness contrast of the display screen, and avoids the halo phenomenon at the junction of the light and dark of the screen.
  • FIG. 4 is a schematic flowchart of a backlight brightness control method according to another embodiment of the present application.
  • the present embodiment performs data compensation on the image of the dark picture to ensure the sharpness of the dark picture.
  • the method includes steps 410 to 470.
  • step 410 an image to be displayed is divided into a set number of pixel blocks based on a preset partition.
  • step 420 an average brightness value of each pixel block is calculated.
  • step 430 a brightness control signal of the backlight control partition matching each pixel block is generated according to the average brightness value.
  • step 440 the brightness of the backlight of each pixel block is controlled by the array substrate in the brightness control liquid crystal screen based on the brightness control signal.
  • step 450 it is determined whether the display screen of the image to be displayed is a dark screen. In the case of the determination result that the display screen of the image to be displayed is a dark screen, step 460 is continued, and when the display screen of the image to be displayed is not a dark screen, Next, step 470 is performed.
  • determining whether the display screen of the image to be displayed is a dark screen includes: calculating the average value of the overall brightness of the image to be displayed according to the average brightness value of each pixel block; When the threshold is set, it is determined that the display screen of the image to be displayed is a dark screen.
  • the average brightness value of each pixel block is summed, and then the obtained sum is divided by the total number of pixel blocks to obtain the overall average brightness value of the image to be displayed.
  • step 460 data compensation is performed on the image to be displayed based on a preset algorithm.
  • the preset compensation coefficient may have a value of 1.2.
  • the preset compensation coefficient is controlled as follows: when ⁇ P (i, j)> 255, ⁇ represents a preset compensation coefficient, and P (i, j) represents a maximum value of a sub-pixel in an image to be displayed. Each pixel includes three sub-pixels of red, green, and blue.
  • step 470 according to the pixel value of each pixel block, the array substrate in the display liquid crystal screen controls the brightness of the liquid crystal screen through the brightness control to display the image to be displayed.
  • the brightness of the LCD panel is controlled by the array substrate in the LCD panel according to the pixel value of each corresponding pixel block after compensation. Display the compensated image to be displayed.
  • the resolution of the LCD liquid crystal display ie, the display liquid crystal display 110 used to display the image content can be selected as 4K, that is, 3840 * 2160 pixels; the LCD liquid crystal display (that is, the brightness control liquid crystal display) used to control the brightness of the backlight 120)
  • the resolution can be selected as FHD, which is 1920 * 1080 pixels.
  • the TCON board After receiving the Vbyone or LVDS signal, the TCON board further sends
  • the LVDS signal is parsed into the RGB signal to be displayed, and the RGB signal to be displayed is normalized so that the range of the RGB signal falls within [0,255], and each frame of the frame to be displayed is divided into N * N pixel blocks.
  • This solution It is divided into 2 * 2 pixel blocks, and each pixel contains three sub-pixels of R, G, and B.
  • the brightness control liquid crystal screen 120 converts the resolved RGB signals to be displayed into corresponding control voltages and applies them to the array substrate of the corresponding pixels.
  • the data compensation module adjusts the image signal to be displayed according to a preset compensation algorithm to achieve data compensation, and then the compensated The image signal to be displayed is displayed.
  • step 510 indicates that the SOC main board in the television converts the image signal to be displayed into VByone or LVDS signals;
  • step 520 indicates that the pre-processing module in the TCON board of the double-layer LCD screen analyzes the VByone or LVDS signals to obtain the RGB signal;
  • step 530 represents the process of digital-to-analog conversion of the voltage control signal generated according to the RGB signal to be displayed;
  • step 540 represents the application of the analog voltage control signal to the array substrate of the corresponding pixel through the brightness control liquid crystal screen 120 to the backlight brightness Control process;
  • step 550 represents the process of data compensation for the image to be displayed on the dark screen;
  • step 560 represents the process of digital-to-analog conversion of the voltage control signal obtained from the image signal to be displayed after data compensation;
  • step 570 represents the pass The process in which the display liquid crystal screen 110 applies an analog voltage signal to the array substrate to display an image to be displayed.
  • the backlight brightness control method provided in this embodiment guarantees the sharpness of the dark picture, improves the contrast of the light and dark of the display picture, and avoids the halo phenomenon at the junction of the light and dark of the picture by compensating the data of the dark picture. .
  • FIG. 6 is a schematic structural diagram of a backlight brightness control device according to an embodiment of the present application.
  • the device may be integrated into the double-layer LCD screen of the first embodiment, and the double-layer LCD screen includes a corresponding display LCD screen and a brightness control LCD screen, and is generally configured in a terminal, such as a television or the like.
  • the device includes a pixel block division module 610, a calculation module 620, a control signal generation module 630, and a control module 640.
  • the pixel block division module 610 is configured to divide an image to be displayed into a set number of pixel blocks based on a preset partition.
  • the calculation module 620 is configured to calculate an average brightness value of each pixel block.
  • the control signal generating module 630 is configured to generate a brightness control signal of the backlight control partition matching each pixel block according to the average brightness value.
  • the control module 640 is configured to control the backlight brightness of each pixel block through the array substrate in the brightness control liquid crystal screen based on the brightness control signal.
  • the calculation module 620 includes a determination unit, a summing unit, and a calculation unit.
  • the determining unit is configured to determine a maximum value in a sub-pixel of each pixel in each pixel block.
  • the summing unit is set to sum the maximum values in the sub-pixels of each pixel.
  • the calculation unit is configured to use the obtained sum and divide by the total number of pixels in each pixel block to obtain an average brightness value of the pixel block; wherein each pixel includes three red, green, and blue sub-pixels.
  • the device further includes a display module configured to control the brightness of the LCD panel through the array substrate in the LCD panel according to the pixel value of each corresponding pixel block, so as to display the brightness to be displayed. The image is displayed.
  • the device further includes: a compensation module configured to control the brightness of the LCD panel through the array substrate in the LCD panel according to the pixel value of each corresponding pixel block, so as to transmit the brightness of the LCD panel.
  • a compensation module configured to control the brightness of the LCD panel through the array substrate in the LCD panel according to the pixel value of each corresponding pixel block, so as to transmit the brightness of the LCD panel.
  • the compensation module determines whether the display screen of the image to be displayed is a dark screen. Specifically,
  • the average value of the overall brightness of the image to be displayed is calculated; and when the average value of the overall brightness of the image to be displayed is less than a set threshold, it is determined that the display screen of the image to be displayed is a dark screen.
  • the compensation module performs data compensation on the image to be displayed based on a preset algorithm, specifically: multiplying each pixel value of the image to be displayed by a preset compensation coefficient to obtain a compensated image to be displayed;
  • ⁇ P (i, j)> 255 ⁇ represents a preset compensation coefficient
  • P (i, j) represents a maximum value of a sub-pixel in an image to be displayed, and each pixel includes three sub-pixels of red, green, and blue.
  • the backlight brightness control device divides an image to be displayed into a set number of pixel blocks according to a preset partition of the brightness control LCD screen, and generates a backlight of each corresponding partition according to an average brightness value of each pixel block.
  • the brightness control signal through independent control of the backlight brightness of each pixel block, improves the brightness contrast of the display screen, and avoids the halo phenomenon at the light-dark junction of the screen.
  • FIG. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • the electronic device includes a processor 670, a memory 671, and a computer program stored on the memory 671 and executable on the processor 670.
  • the number of processors 670 may be one or more. In FIG. 7, one processor 670 is used as an example.
  • the electronic device may further include an input device 672 and an output device 673.
  • the processor 670, the memory 671, the input device 672, and the output device 673 may be connected through a bus or other methods. In FIG. 7, the connection through the bus is taken as an example.
  • the memory 671 is a computer-readable storage medium, and may be configured to store software programs, computer-executable programs, and modules, such as a backlight brightness control device / module (for example, a pixel block division module in a backlight brightness control device) in the embodiment of the present application. 610 and calculation module 620, etc.).
  • the processor 670 executes various functional applications and data processing of the electronic device by running software programs, instructions, and modules stored in the memory 671, that is, the above-mentioned backlight brightness control method is implemented.
  • the memory 671 may mainly include a storage program area and a storage data area, where the storage program area may store an operating system and application programs required for at least one function; the storage data area may store data created according to the use of the terminal, and the like.
  • the memory 671 may include a high-speed random access memory, and may further include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage device.
  • the memory 671 may further include memory remotely disposed with respect to the processor 670, and these remote memories may be connected to the electronic device / storage medium through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
  • the input device 672 may be configured to receive inputted numeric or character information, and generate key signal inputs related to user settings and function control of the electronic device.
  • the output device 673 may include a display device such as a display screen.
  • An embodiment of the present application further provides a storage medium containing computer-executable instructions.
  • the method is configured to perform a backlight brightness control method.
  • the method includes: based on a preset image to be displayed.
  • the partition is divided into a set number of pixel blocks; the average brightness value of each pixel block is calculated; the brightness control signal of the backlight control partition matching each pixel block is generated according to the average brightness value; and the brightness control signal is used to control the brightness of the LCD screen.
  • the array substrate controls the backlight brightness of each pixel block.
  • a storage medium including computer-executable instructions provided in the embodiments of the present application is not limited to the method operations described above, and may also perform operations related to backlight brightness control provided by any embodiment of the present application.

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Abstract

一种双层液晶屏、背光亮度控制方法、装置及电子设备，方法包括：将待显示图像基于预设分区划分为设定数量的像素块（310）；计算每个像素块的平均亮度值（320）；根据平均亮度值生成与各对应像素块匹配的背光控制分区的亮度控制信号（330）；基于亮度控制信号通过亮度控制液晶屏（120）中的阵列基板（122）对各对应像素块的背光亮度进行控制（340）。

Description

一种双层液晶屏、背光亮度控制方法、装置及电子设备
本申请要求在2018年08月06日提交中国专利局、申请号为201810883905.6的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及LED背光源亮度控制技术领域，例如一种双层液晶屏、背光亮度控制方法、装置及电子设备。
背景技术
随着对画质的追求越来越高，目前在很多中高端电视上已使用多分区背光来实现显示。传统的区域调光背光模组是利用数百个发光二极管(Light-Emitting Diode，LED)灯组成的背光源代替冷阴极荧光灯管(Cold Cathode Fluorescent Lamp，CCFL)背光灯，组成背光源的各LED灯可根据图像的明暗进行调节，用于显示待显示图像中高亮部分的LED灯可以调节到最大亮度，而同时用于显示待显示图像中黑暗部分的LED灯可以相应降低亮度甚至关闭，以达到最佳的对比度。但传统的区域调光技术在图像亮暗交界的画面处容易产生光晕现象，显示效果不佳。
发明内容
本申请实施例提供一种双层液晶屏、背光亮度控制方法、装置及电子设备，以提高显示画面的对比度，避免相关技术中的区域调光方法中存在光晕的情况。
本申请实施例采用如下技术方案：
第一方面，本申请实施例提供了一种双层液晶屏，包括：对应设置的显示液晶屏和亮度控制液晶屏；其中，所述亮度控制液晶屏包括背光源、阵列基板、偏光片以及液晶盒，且设置为根据待显示图像的多个预设分区的每个预设分区的平均亮度控制每个所述预设分区中所述背光源入射光亮度的大小；所述显示液晶屏包括阵列基板、偏光片、液晶盒以及彩色滤光片，设置为根据待显示图像的像素值控制从所述亮度控制液晶屏进入所述显示液晶屏的光亮度的大小，以将所述待显示图像进行显示；所述多个预设分区的数量依据待显示图像的像素总数进行确定。
第二方面，本申请实施例提供了一种背光亮度控制方法，所述方法应用于上述第一方面所述的双层液晶屏，包括：将待显示图像基于预设分区划分为设 定数量的像素块；计算每个所述像素块的平均亮度值；根据所述平均亮度值生成与每个所述像素块匹配的背光控制分区的亮度控制信号；基于所述亮度控制信号通过所述亮度控制液晶屏中的阵列基板对每个所述像素块的背光亮度进行控制。
第三方面，本申请实施例提供了一种背光亮度控制装置，配置于上述第一方面所述的双层液晶屏，所述双层液晶屏包括对应设置的液晶显示屏和亮度控制液晶屏，所述装置包括：像素块划分模块，设置为将待显示图像基于预设分区划分为设定数量的像素块；计算模块，设置为计算每个所述像素块的平均亮度值；控制信号生成模块，设置为根据所述平均亮度值生成与每个所述像素块匹配的背光控制分区的亮度控制信号；控制模块，设置为基于所述亮度控制信号通过所述亮度控制液晶屏中的阵列基板对每个所述像素块的背光亮度进行控制。
第四方面，本申请实施例提供了一种电子设备，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现如上述第二方面所述的背光亮度控制方法。
第五方面，本申请实施例提供了一种包含计算机可执行指令的存储介质，所述计算机可执行指令在由计算机处理器执行时实现如上述第二方面所述的背光亮度控制方法。
附图说明
图1为本申请一实施例提供的一种双层液晶屏的结构示意图；
图2为本申请一实施例提供的一种显示液晶屏和亮度控制液晶屏的预设分区对应关系示意图；
图3为本申请一实施例提供的一种背光亮度控制方法流程示意图；
图4为本申请另一实施例提供的一种背光亮度控制方法流程示意图；
图5为本申请一实施例提供的一种对待显示图像信号进行处理的流程示意图；
图6为本申请一实施例提供的一种背光亮度控制装置结构示意图；
图7为本申请一实施例提供的一种电子设备的结构示意图。
具体实施方式
下面将结合附图对本申请实施例的技术方案作进一步的详细描述，，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。
图1为本申请一实施例提供的一种双层液晶屏的结构示意图。参见图1所 示，双层液晶屏包括：对应设置的显示液晶屏110和亮度控制液晶屏120；其中，亮度控制液晶屏120包括背光源121、阵列基板122、偏光片123(偏光片123包括上偏光片1231和下偏光片1232)以及液晶盒124，设置为根据待显示图像的多个预设分区的每个预设分区的平均亮度，控制每个预设分区中背光源121入射光亮度的大小。在一实施例中，根据待显示图像每个预设分区的平均亮度生成对应分区的控制电压，然后由阵列基板122通过施加控制电压控制液晶盒124中液晶分子的旋转，从而实现控制对应分区中背光源121入射光亮度的大小。其中，背光源121除了包括背光源，还包括反射板、导光板、扩散板、增透膜等结构，这些结构是用于使线光源转变成亮度均匀的面光源的结构。
显示液晶屏110包括阵列基板111、偏光片112、(偏光片112包括上偏光片1121和下偏光片1122)、液晶盒113以及彩色滤光片114，设置为根据待显示图像的像素值控制从亮度，控制液晶屏120进入显示液晶屏110的光亮度的大小，以将待显示图像进行显示。在一实施例中，显示液晶屏110中的驱动芯片根据待显示图像的像素值生成驱动电压信号，并将该驱动电压信号发送至阵列基板111，阵列基板111通过控制电压控制液晶盒113中的液晶分子旋转，从而实现控制从亮度控制液晶屏120进入显示液晶屏110的光亮度的大小，最终实现将待显示图像进行显示。
多个预设分区的数量依据待显示图像的像素总数进行确定，显示液晶屏110和亮度控制液晶屏120的预设分区对应设置，具体可以参见图2所示的显示液晶屏110和亮度控制液晶屏120的预设分区对应关系示意图。通过对待显示图像的背光亮度进行像素级的多分区控制，提高了待显示图像的对比度，使得图像亮暗画面过渡自然，避免了光晕现象。
例如，若输入一帧4K2K的待显示图像，分辨率为3840*1920，以4个像素分为一个像素区块，每个像素区块的平均亮度值作为背光控制对应分区的亮度控制信号，则背光控制液晶屏即亮度控制液晶屏120的分辨率可以为全高清(Full High Definition，FHD)即1920*1080。
亮度控制液晶屏120的分辨率还可以为高清视频(High Definition，HD)即1366*768，也可以是4K2K等。同理，显示液晶屏110的分辨率也不局限为4K2K，也可以是FHD等。
本实施例提供的一种双层液晶屏，包括对应设置的显示液晶屏和亮度控制 液晶屏，其中，亮度控制液晶屏基于待显示图像的像素总数划分为多个预设分区，并根据待显示图像每个预设分区的平均亮度控制对应分区中背光源入射光亮度的大小，再通过显示液晶屏根据待显示图像的像素值控制从亮度控制液晶屏进入显示液晶屏的光亮度的大小，以将待显示图像进行显示，提高了待显示图像的对比度，使得图像亮暗画面过渡自然，避免了光晕现象。
图3为本申请一实施例提供的一种背光亮度控制方法流程示意图。本实施例公开的背光亮度控制方法应用于上述实施例的双层液晶屏，该方法可以由背光亮度控制装置来执行，其中该装置可由软件、硬件其中至少一种方式实现，并一般集成在终端中，例如电视等。具体参见图3所示，该方法包括步骤310至步骤340。
在步骤310中，将待显示图像基于预设分区划分为设定数量的像素块。
例如，待显示图像的分辨率为3840*2160，上述亮度控制液晶屏120的分辨率为1920*1080，即预设分区的数量为1920*1080；则将待显示图像划分为1920*1080个2*2的像素块。
在步骤320中，计算每个像素块的平均亮度值。
示例性的，计算每个像素块的平均亮度值，包括：
确定每个像素块中每个像素的子像素中的最大值；
对每个像素块中多个像素一一对应的多个最大值求和；
利用求得的最大值和除以每个像素块中多个像素的总个数，得到每个像素块的平均亮度值；
其中，每个像素包括红、绿和蓝三个子像素。
具体的，在彩色图像中，为了表现不同的色彩通道，每一个像素均由多个子像素组成，每个子像素负载处理一个色彩通道，因而使每个像素表现出多种不同的颜色。每个子像素背后的光源都可以显现出不同的亮度级别，而子像素值则代表了该子像素在最暗到最亮之间不同亮度的层次级别。通常情况下，液晶显示中每个像素包括红、绿、蓝(RGB)三个子像素。不同位数的液晶显示屏，其子像素值的取值范围也不同，例如，8bit的液晶显示屏，其每个子像素的取值范围在0-255(2 8)之间，10bit的液晶显示屏，其每个子像素的取值范围在0-1023(2 10)之间。假设其中一个像素的三个子像素值分别为R＝0，G＝5，B＝10，则该像素的子像素的最大值为10。
在步骤330中，根据平均亮度值生成与每个像素块匹配的背光控制分区的亮度控制信号。
其中，与每个像素块匹配的背光控制分区指双层液晶屏中依据待显示图像的像素总数划分的预设分区。
在步骤340中，基于亮度控制信号通过亮度控制液晶屏中的阵列基板对每个像素块的背光亮度进行控制。
其中，亮度控制信号具体为阵列基板122的控制电压信号，阵列基板122通过施加控制电压信号控制液晶盒124中液晶分子的旋转，从而实现控制对应分区中背光源121入射光亮度的大小。通过根据每个像素块的平均亮度值，对每个预设分区的背光源亮度大小进行独立控制，提高了显示画面的明暗对比度，避免了在画面亮暗交界处出现光晕现象。
本实施例提供的一种背光亮度控制方法，通过将待显示图像按照亮度控制液晶屏的预设分区划分为设定数量的像素块，并根据每个像素块的平均亮度值生成各对应分区的背光亮度控制信号，通过对每个像素块的背光亮度进行独立控制，提高了显示画面的明暗对比度，避免了在画面亮暗交界处出现光晕现象。
图4为本申请另一实施例提供的一种背光亮度控制方法流程示意图。在上述实施例的基础上，本实施例对暗画面的图像进行了数据补偿，保证了暗画面的清晰度。具体参见图4所示，该方法包括步骤410至步骤470。
在步骤410中，将待显示图像基于预设分区划分为设定数量的像素块。
在步骤420中，计算每个像素块的平均亮度值。
在步骤430中，根据平均亮度值生成与每个像素块匹配的背光控制分区的亮度控制信号。
在步骤440中，基于亮度控制信号通过亮度控制液晶屏中的阵列基板对每个像素块的背光亮度进行控制。
在步骤450中，判断待显示图像的显示画面是否为暗画面，在待显示图像的显示画面是暗画面的判断结果情况下，继续执行步骤460，在待显示图像的显示画面不是暗画面的情况下，执行步骤470。
在一实施例中，判断待显示图像的显示画面是否为暗画面，包括：根据每个像素块的平均亮度值计算待显示图像的整体亮度平均值；在待显示图像的整体亮度平均值小于设定阈值的情况下，确定待显示图像的显示画面为暗画面。
在一实施例中，将每个像素块的平均亮度值求和，然后利用求得的和除以像素块的总个数，得到待显示图像的整体亮度平均值。
在步骤460中，基于预设算法对待显示图像进行数据补偿。
将待显示图像的每个像素值乘以预设补偿系数，得到补偿后的待显示图像。
在一实施例中，预设补偿系数可以取值为1.2，为了防止数据补偿过大导致画面失真，通过如下方式对预设补偿系数进行控制：当λP(i,j)＞255时，
Figure PCTCN2019094262-appb-000001
λ表示预设补偿系数,P(i,j)表示待显示图像中子像素的最大值，每个像素包括红、绿以及蓝三个子像素。
在步骤470中，根据每个像素块的像素值通过显示液晶屏中的阵列基板对亮度控制液晶屏透过光亮度的大小进行控制，以将待显示图像进行显示。
需要说明的是，若对待显示图像进行了数据补偿，则根据补偿后的每个对应像素块的像素值通过显示液晶屏中的阵列基板对亮度控制液晶屏透过光亮度的大小进行控制，以将补偿后的待显示图像进行显示。
本实施例中用于显示图像内容的LCD液晶屏(即显示液晶屏110)的分辨率可选为4K，即3840*2160个像素；用于控制背光亮度的LCD液晶屏(即亮度控制液晶屏120)的分辨率可选为FHD，即1920*1080个像素。首先电视机接收待显示图像信号，然后电视机中的SOC主板将待显示图像信号转换为VByone或LVDS信号输出到双层液晶屏端的TCON板；TCON板接收到Vbyone或LVDS信号后进一步将Vbyone或LVDS信号解析为待显示RGB信号，并且对待显示RGB信号进行归一化，以使RGB信号的范围落在[0，255]，同时将每帧待显示画面分成N*N个像素块，本方案中划分为2*2的像素块，每个像素包含R、G、B三个子像素。亮度控制液晶屏120将解析到的待显示RGB信号转换成相应的控制电压施加在相应像素的阵列基板上。
在一实施例中，在待显示画面为暗画面的情况下，通过数据补偿模块根据预设的补偿算法，对待显示图像信号进行调整，以实现数据补偿，然后由显示液晶屏110对补偿后的待显示图像信号进行显示。
上述过程的具体流程可参见图5所示。其中，步骤510表示电视机中的SOC主板将待显示图像信号转换为VByone或LVDS信号；步骤520表示双层液晶屏端的TCON板中的预处理模块对VByone或LVDS信号进行解析以得到待显示的RGB信号；步骤530表示对根据待显示的RGB信号生成的电压控制信号进行数模 转换的过程；步骤540表示通过亮度控制液晶屏120将模拟电压控制信号施加至对应像素的阵列基板以对背光亮度进行控制的过程；步骤550表示对暗画面的待显示图像进行数据补偿的过程；步骤560表示对根据数据补偿之后的待显示图像信号得到的电压控制信号进行数模转换的过程；步骤570表示通过显示液晶屏110将模拟电压信号施加至阵列基板以对待显示图像进行显示的过程。
本实施例提供的一种背光亮度控制方法，通过对暗画面的图像进行数据补偿，保证了暗画面的清晰度，提高了显示画面的明暗对比度，避免了在画面亮暗交界处出现光晕现象。
图6为本申请一实施例提供的一种背光亮度控制装置结构示意图。该装置可集成于上述实施例一的双层液晶屏，该双层液晶屏包括对应设置的显示液晶屏和亮度控制液晶屏，并一般配置于终端中，例如电视等终端。参见图6所示，装置包括：像素块划分模块610、计算模块620、控制信号生成模块630和控制模块640。
像素块划分模块610，设置为将待显示图像基于预设分区划分为设定数量的像素块。
计算模块620，设置为计算每个像素块的平均亮度值。
控制信号生成模块630，设置为根据平均亮度值生成与每个像素块匹配的背光控制分区的亮度控制信号。
控制模块640，设置为基于亮度控制信号通过亮度控制液晶屏中的阵列基板对每个像素块的背光亮度进行控制。
在一实施例中，计算模块620包括确定单元，求和单元和计算单元。
确定单元，设置为确定每个像素块中每个像素的子像素中的最大值。
求和单元，设置为对每个像素的子像素中的最大值求和。
计算单元，设置为利用求得的和除以每个像素块中像素的总个数，得到像素块的平均亮度值；其中，每个像素包括红、绿和蓝三个子像素。
在一实施例中，该装置还包括显示模块，设置为根据每个对应像素块的像素值通过显示液晶屏中的阵列基板对亮度控制液晶屏透过光亮度的大小进行控制，以将待显示图像进行显示。
在一实施例中，该装置还包括：补偿模块，设置为在根据每个对应像素块的像素值通过显示液晶屏中的阵列基板对亮度控制液晶屏透过光亮度的大小进 行控制，以将待显示图像进行显示之前，判断待显示图像的显示画面是否为暗画面，在待显示图像的显示画面为暗画面的情况下，基于预设算法对待显示图像进行数据补偿。
在一实施例中，补偿模块判断待显示图像的显示画面是否为暗画面具体为，
根据每个像素块的平均亮度值计算待显示图像的整体亮度平均值；在待显示图像的整体亮度平均值小于设定阈值的情况下，确定待显示图像的显示画面为暗画面。
在一实施例中，补偿模块基于预设算法对待显示图像进行数据补偿，具体为：将待显示图像的每个像素值乘以预设补偿系数，得到补偿后的待显示图像；
其中，当λP(i,j)＞255时，
Figure PCTCN2019094262-appb-000002
λ表示预设补偿系数，P(i,j)表示待显示图像中子像素的最大值，每个像素包括红、绿以及蓝三个子像素。
本实施例提供的背光亮度控制装置，通过将待显示图像按照亮度控制液晶屏的预设分区划分为设定数量的像素块，并根据每个像素块的平均亮度值生成每个对应分区的背光亮度控制信号，通过对每个像素块的背光亮度进行独立控制，提高了显示画面的明暗对比度，避免了在画面亮暗交界处出现光晕现象。
图7为本申请一实施例提供的一种电子设备的结构示意图。如图7所示，该电子设备包括：处理器670、存储器671及存储在存储器671上并可在处理器670上运行的计算机程序。其中，处理器670的数量可以是一个或多个，图7中以一个处理器670为例，处理器670执行计算机程序时实现如上述实施例一中的背光亮度控制方法。如图7所示，电子设备还可以包括输入装置672和输出装置673。处理器670、存储器671、输入装置672和输出装置673可以通过总线或其他方式连接，图7中以通过总线连接为例。
存储器671作为一种计算机可读存储介质，可设置为存储软件程序、计算机可执行程序以及模块，如本申请实施例中背光亮度控制装置/模块(例如，背光亮度控制装置中的像素块划分模块610和计算模块620等)。处理器670通过运行存储在存储器671中的软件程序、指令以及模块，从而执行电子设备的各种功能应用以及数据处理，即实现上述的背光亮度控制方法。
存储器671可主要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；存储数据区可存储根据终端的使用所创建的数据等。此外，存储器671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、或其他非易失性固态存储器件。在一些实例中，存储器671可进一步包括相对于处理器670远程设置的存储器，这些远程存储器可以通过网络连接至电子设备/存储介质。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
输入装置672可设置为接收输入的数字或字符信息，以及产生与电子设备的用户设置以及功能控制有关的键信号输入。输出装置673可包括显示屏等显示设备。
本申请一实施例还提供一种包含计算机可执行指令的存储介质，计算机可执行指令在由计算机处理器执行时设置为执行一种背光亮度控制方法，该方法包括：将待显示图像基于预设分区划分为设定数量的像素块；计算每个像素块的平均亮度值；根据平均亮度值生成与每个像素块匹配的背光控制分区的亮度控制信号；基于亮度控制信号通过亮度控制液晶屏中的阵列基板对每个像素块的背光亮度进行控制。
当然，本申请实施例所提供的一种包含计算机可执行指令的存储介质，其计算机可执行指令不限于如上的方法操作，还可以执行本申请任意实施例所提供的背光亮度控制相关操作。
通过以上关于实施方式的描述，所属领域的技术人员可以清楚地了解到，本申请可借助软件及必需的通用硬件来实现，当然也可以通过硬件实现，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如计算机的软盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、闪存(FLASH)、硬盘或光盘等，包括若干指令用以使得一台计算机设备(可以是个人计算机，存储介质，或者网络设备等)执行本申请各个实施例所述的方案。

Claims (15)

  1. 一种双层液晶屏，包括：对应设置的显示液晶屏和亮度控制液晶屏；
    其中，所述亮度控制液晶屏包括背光源、阵列基板、偏光片以及液晶盒，且设置为根据待显示图像的多个预设分区的每个预设分区的平均亮度控制每个所述预设分区中所述背光源入射光亮度的大小；
    所述显示液晶屏包括阵列基板、偏光片、液晶盒以及彩色滤光片，设置为根据待显示图像的像素值控制从所述亮度控制液晶屏进入所述显示液晶屏的光亮度的大小，以将所述待显示图像进行显示所述多个预设分区的数量依据待显示图像的像素总数进行确定。
  2. 一种背光亮度控制方法，应用于上述权利要求1所述的双层液晶屏，包括：
    将待显示图像基于预设分区划分为设定数量的像素块；
    计算每个所述像素块的平均亮度值；
    根据所述平均亮度值生成与每个所述像素块匹配的背光控制分区的亮度控制信号；
    基于所述亮度控制信号通过所述亮度控制液晶屏中的阵列基板对每个所述像素块的背光亮度进行控制。
  3. 根据权利要求2所述的方法，其中，每个所述像素块包括多个像素，所述计算每个所述像素块的平均亮度值，包括：
    确定每个所述像素块中每个像素的子像素中的最大值；
    对每个所述像素块中多个像素一一对应的多个最大值求和；
    利用求得的所述最大值的和除以每个所述像素块中多个像素的总个数，得到每个所述像素块的平均亮度值；
    其中，所述每个像素包括红、绿和蓝三个子像素。
  4. 根据权利要求2所述的方法，还包括：根据每个像素块的像素值通过所述显示液晶屏中的阵列基板对所述亮度控制液晶屏透过光亮度的大小进行控制，以将待显示图像进行显示。
  5. 根据权利要求4所述的方法，其中，在所述根据每个像素块的像素值通过所述显示液晶屏中的阵列基板对所述亮度控制液晶屏透过光亮度的大小进行控制，以将待显示图像进行显示之前，还包括：
    判断所述待显示图像的显示画面是否为暗画面；
    在判断结果为所述待显示图像的显示画面为暗画面的情况下，基于预设算法对所述待显示图像进行数据补偿；
    根据每个像素块的像素值通过所述显示液晶屏中的阵列基板对所述亮度控制液晶屏透过光亮度的大小进行控制，以将待显示图像进行显示，包括：
    根据补偿后的每个像素块的像素值通过所述显示液晶屏中的阵列基板对所 述亮度控制液晶屏透过光亮度的大小进行控制，以将补偿后的待显示图像进行显示。
  6. 根据权利要求5所述的方法，其中，所述判断所述待显示图像的显示画面是否为暗画面，包括：
    根据每个所述像素块的平均亮度值计算所述待显示图像的整体亮度平均值；
    在所述待显示图像的整体亮度平均值小于设定阈值的情况下，确定所述待显示图像的显示画面为暗画面。
  7. 根据权利要求5所述的方法，其中，所述基于预设算法对所述待显示图像进行数据补偿，包括：
    将所述待显示图像的每个像素值乘以预设补偿系数，得到补偿后的待显示图像；
    其中，当λP(i,j)＞255时，
    Figure PCTCN2019094262-appb-100001
    λ表示预设补偿系数，P(i,j)表示所述待显示图像中子像素的最大值，每个像素包括红、绿以及蓝三个子像素。
  8. 一种背光亮度控制装置，集成于上述权利要求1所述的双层液晶屏，所述双层液晶屏包括对应设置的显示液晶屏和亮度控制液晶屏，所述装置包括：
    像素块划分模块，设置为将待显示图像基于预设分区划分为设定数量的像素块；
    计算模块，设置为计算每个所述像素块的平均亮度值；
    控制信号生成模块，设置为根据所述平均亮度值生成与每个所述像素块匹配的背光控制分区的亮度控制信号；
    控制模块，设置为基于所述亮度控制信号通过所述亮度控制液晶屏中的阵列基板对每个所述像素块的背光亮度进行控制。
  9. 根据权利要求8所述的装置，其中，每个所述像素块包括多个像素，所述计算模块包括：
    确定单元，设置为确定每个像素块中每个像素的子像素中的最大值；
    求和单元，设置为对每个像素块中多个像素一一对应多个最大值求和；
    计算单元，设置为利用求得的所述最大值的和除以每个像素块中多个像素的总个数，得到每个像素块的平均亮度值；
    其中，每个像素包括红、绿和蓝三个子像素。
  10. 根据权利要求8所述的装置，还包括显示模块；
    所述显示模块设置为根据每个像素块的像素值通过所述显示液晶屏中的所述阵列基板对所述亮度控制液晶屏透过光亮度的大小进行控制，以将待显示图像进行显示。
  11. 根据权利要求8所述的装置，还包括补偿模块；
    所述补偿模块设置为根据每个像素块的像素值通过所述显示液晶屏中的所述阵列基板对所述亮度控制液晶屏透过光亮度的大小进行控制，以将待显示图像进行显示之前，判断待显示图像的显示画面是否为暗画面，在待显示图像的显示画面为暗画面的情况下，基于预设算法对待显示图像进行数据补偿。
  12. 根据权利要求11所述的装置，其中，所述补偿模块设置为通过以下方式判断待显示图像的显示画面是否为暗画面：
    根据每个像素块的平均亮度值计算待显示图像的整体亮度平均值；在待显示图像的整体亮度平均值小于设定阈值的情况下，确定待显示图像的显示画面为暗画面。
  13. 根据权利要求11所述的装置，其中，所述补偿模块设置为通过以下方式基于预设算法对待显示图像进行数据补偿：
    将待显示图像的每个像素值乘以预设补偿系数，得到补偿后的待显示图像；
    其中，当λP(i,j)＞255时，
    Figure PCTCN2019094262-appb-100002
    λ表示预设补偿系数，P(i,j)表示待显示图像中子像素的最大值，每个像素包括红、绿以及蓝三个子像素。
  14. 一种电子设备，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现如权利要求2-7中任一项所述的背光亮度控制方法。
  15. 一种包含计算机可执行指令的存储介质，所述计算机可执行指令在由计算机处理器执行时实现如权利要求2-7中任一项所述的背光亮度控制方法。
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CN108877694A (zh) * 2018-08-06 2018-11-23 深圳创维－Rgb电子有限公司 一种双层液晶屏、背光亮度控制方法、装置及电子设备

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