WO2023116100A1 - 一种显示设备、图像处理方法及装置 - Google Patents

一种显示设备、图像处理方法及装置 Download PDF

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Publication number
WO2023116100A1
WO2023116100A1 PCT/CN2022/121413 CN2022121413W WO2023116100A1 WO 2023116100 A1 WO2023116100 A1 WO 2023116100A1 CN 2022121413 W CN2022121413 W CN 2022121413W WO 2023116100 A1 WO2023116100 A1 WO 2023116100A1
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WIPO (PCT)
Prior art keywords
backlight
image
parameter
partitions
image signal
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Ceased
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PCT/CN2022/121413
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English (en)
French (fr)
Inventor
李小龙
陈冲
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Hisense Visual Technology Co Ltd
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Hisense Visual Technology Co Ltd
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Filing date
Publication date
Application filed by Hisense Visual Technology Co Ltd filed Critical Hisense Visual Technology Co Ltd
Priority to CN202280063160.3A priority Critical patent/CN117980984A/zh
Publication of WO2023116100A1 publication Critical patent/WO2023116100A1/zh
Priority to US18/732,156 priority patent/US12374304B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G09G3/36—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
    • 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
    • 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
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • 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
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. 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
    • 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
    • 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
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the embodiment of the present application relates to the field of display technology. More specifically, it relates to a display device, an image processing method and device.
  • LCD liquid crystal display
  • the partitioned backlight processing module of the LCD enhances the brightness and color contrast of the image displayed on the LCD by adopting the regional light control technology and the method of increasing the peak brightness of the local partition, and improves the display effect of the image.
  • the present application provides a display device, image processing method and device, which solves the problem of color fading of the image in the related art, optimizes the color brightness of the image to be displayed, and improves the display effect of the image.
  • An embodiment of the present application provides a display device, including: a controller configured to: obtain backlight values of all partitions according to image signals, and obtain image signals of images to be displayed according to the backlight values of all partitions;
  • the backlight value of the partition is sent to the partition backlight processing module, so that the partition backlight processing module obtains the backlight gain parameter according to the backlight values of all partitions, wherein the partition backlight processing module is used to drive the backlight display of the backlight assembly; receiving the The backlight gain parameter returned by the partition backlight processing module, the compensation parameter is determined according to the backlight gain parameter, and the compensated image signal is obtained according to the compensation parameter and the image signal; the display connected to the controller is used to display Compensated image.
  • the controller is configured to: when performing the determining the compensation parameter according to the backlight gain parameter, the controller is configured to: determine the corresponding value of the backlight gain parameter according to a preset mapping table. or, determine the compensation parameter corresponding to the backlight gain parameter according to the peak brightness compensation curve.
  • the controller before performing the determining the compensation parameter corresponding to the backlight gain parameter according to the peak brightness compensation curve, is further configured to: determine the maximum value of the backlight gain parameter as the backlight gain A parameter threshold, and determine a compensation parameter threshold of the backlight gain parameter threshold according to a target chromaticity value, wherein the target chromaticity value is a standard chromaticity value of the display device;
  • a target parameter is determined according to the backlight gain parameter threshold and the compensation parameter threshold, and a peak brightness compensation curve is generated according to the target parameter, wherein the peak brightness compensation curve is a logarithmic function curve, and the target parameter is the peak value The base of the brightness compensation curve.
  • the controller is further configured to: generate a timing control signal according to the compensated image signal , so that the timing controller drives the image display of the liquid crystal panel according to the timing control signal; determines the adjustment parameter according to the image displayed in the liquid crystal panel, and compensates the preset mapping table or the peak brightness according to the adjustment parameter Curves are adjusted.
  • the controller before performing the step of obtaining the backlight values of all partitions according to the image signal, the controller is further configured to: perform image quality enhancement processing on the image signal to obtain preset image information to be enhanced Corresponding location information of all partitions to be enhanced; after performing the determination of compensation parameters according to the backlight gain parameters, the controller is further configured to: determine the location of the region to be enhanced according to the location information corresponding to all partitions to be enhanced Image signal: Obtain a compensated image signal corresponding to the area to be enhanced according to the compensation parameter and the image signal of the area to be enhanced.
  • the controller before performing the determining the image signals of all the subregions to be enhanced according to the compensation parameters and the position information of all the subregions to be enhanced, the controller is further configured to: according to the The position information corresponding to all partitions to be enhanced determines the number of all partitions to be enhanced, and determines the proportional coefficient according to the number of all partitions to be enhanced and the number of all partitions; the controller is also configured to: if the proportional coefficient is greater than or equal to the preset percentage, then obtain the compensated image signal corresponding to the region to be enhanced according to the compensation parameter and the image signal of the region to be enhanced; otherwise, obtain the compensated image signal according to the compensation parameter and the image signal image signal.
  • the compensation parameter is a chroma compensation parameter.
  • An embodiment of the present application provides an image processing method for a display device, including: obtaining backlight values of all partitions according to image signals, and obtaining image signals of images to be displayed according to the backlight values of all partitions;
  • the backlight value of the partition is sent to the partition backlight processing module, so that the partition backlight processing module obtains the backlight gain parameter according to the backlight values of all partitions, wherein the partition backlight processing module is used to drive the backlight display of the backlight assembly; receiving the partition
  • the backlight gain parameter returned by the backlight processing module determines a compensation parameter according to the backlight gain parameter, and obtains a compensated image signal according to the compensation parameter and the image signal.
  • FIG. 1 is a schematic diagram of an operation scene between a display device and a control device according to an embodiment of the present application
  • FIG. 2 is a block diagram of a hardware configuration of a control device 100 according to an embodiment of the present application
  • FIG. 3 is a block diagram of a hardware configuration of a display device 200 according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of software configuration in a display device according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram showing an icon control interface of an application program in a display device according to an embodiment of the present application
  • FIG. 6 is a schematic structural diagram of a display device according to an embodiment of the present application.
  • FIG. 7 is a first schematic flow diagram of an image processing method according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of displaying backlight values by partitions of a backlight assembly according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a peak backlight gain curve according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a peak brightness compensation curve according to an embodiment of the present application.
  • FIG. 11 is a second schematic flow diagram of an image processing method according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of an image processing device according to an embodiment of the present application.
  • FIG. 1 is a schematic diagram of an operation scene between a display device and a control device according to an embodiment of the present application.
  • a user can operate a display device 100 through a mobile terminal 300 and a control device 200 .
  • the control device 200 may be a remote controller, and the communication between the remote controller and the display device includes infrared protocol communication, bluetooth protocol communication, wireless or other wired methods to control the display device 100 .
  • the user can control the display device 100 by inputting user instructions through buttons on the remote controller, voice input, control panel input, and the like.
  • mobile terminals, tablet computers, computers, notebook computers, and other smart devices can also be used to control the display device 100 .
  • FIG. 2 is a configuration block diagram of a control device 100 according to an embodiment of the present application.
  • the control device 100 includes a controller 110 , a communication interface 130 , a user input/output interface 140 , a memory, and a power supply.
  • the control device 100 can receive the user's input operation instruction, and convert the operation instruction into an instruction that the display device 200 can recognize and respond to, and play an intermediary role between the user and the display device 200 .
  • the communication interface 130 is used for communicating with the outside, and includes at least one of a WIFI chip, a Bluetooth module, NFC or an alternative module.
  • the user input/output interface 140 includes at least one of a microphone, a touch pad, a sensor, a button or an alternative module.
  • FIG. 3 is a block diagram of a hardware configuration of a display device 200 according to an embodiment of the present application.
  • the display device 200 includes a tuner and demodulator 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply, and a user interface. at least one.
  • the controller includes a CPU, a video processor, an audio processor, a graphics processor, a RAM, a ROM, a first interface to an nth interface for input/output.
  • the display 260 includes a display screen component for presenting images, and a drive component for driving image display, for receiving image signals output from the controller, and displaying video content, image content, and menu manipulation interface. Components and user manipulation of the UI interface, etc.
  • the display 260 may be at least one of a liquid crystal display, an OLED display, and a projection display, and may also be a projection device and a projection screen.
  • the tuner-demodulator 210 receives broadcast TV signals through wired or wireless reception, and demodulates audio and video signals, such as EPG data signals, from multiple wireless or cable broadcast TV signals.
  • the communicator 220 is a component for communicating with external devices or servers according to various communication protocol types.
  • the communicator may include at least one of a Wifi module, a Bluetooth module, a wired Ethernet module and other network communication protocol chips or near field communication protocol chips, and an infrared receiver.
  • the display device 200 can establish transmission and reception of control signals and data signals with the control device 100 or the server 400 through the communicator 220 .
  • the detector 230 is used to collect signals of the external environment or interaction with the outside.
  • the detector 230 includes a light receiver, which is a sensor for collecting ambient light intensity; or, the detector 230 includes an image collector, such as a camera, which can be used to collect external environmental scenes, user attributes or user interaction gestures, or , the detector 230 includes a sound collector, such as a microphone, for receiving external sound.
  • the external device interface 240 may include, but is not limited to, the following: High Definition Multimedia Interface Interface (HDMI), Analog or Data High Definition Component Input Interface (Component), Composite Video Input Interface (CVBS), USB Input Interface (USB) , RGB port, etc. any one or more interfaces. It may also be a composite input/output interface formed by the above-mentioned multiple interfaces.
  • HDMI High Definition Multimedia Interface Interface
  • Component Composite Video Input Interface
  • CVBS Composite Video Input Interface
  • USB USB Input Interface
  • RGB port etc. any one or more interfaces. It may also be a composite input/output interface formed by the above-mentioned multiple interfaces.
  • the controller 250 and the tuner-demodulator 210 may be located in different split devices, that is, the tuner-demodulator 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box wait.
  • the controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in the memory.
  • the controller 250 controls the overall operations of the display device 200 . For example, in response to receiving a user command for selecting a UI object to be displayed on the display 260, the controller 250 may perform an operation related to the object selected by the user command.
  • the object may be any one of selectable objects, such as hyperlinks, icons, or other operable controls. Operations related to the selected object include: displaying hyperlink pages, documents, images, etc., or executing the program corresponding to the icon.
  • the controller includes a central processing unit (Central Processing Unit, CPU), a video processor, an audio processor, a graphics processing unit (Graphics Processing Unit, GPU), RAM Random Access Memory, RAM), ROM (Read- Only Memory, ROM), at least one of the first interface to the nth interface for input/output, a communication bus (Bus), and the like.
  • CPU Central Processing Unit
  • video processor video processor
  • audio processor audio processor
  • graphics processing unit Graphics Processing Unit, GPU
  • RAM Random Access Memory
  • ROM Read- Only Memory
  • CPU processor It is used to execute the operating system and application program instructions stored in the memory, and to execute various application programs, data and content according to various interactive instructions received from the outside, so as to finally display and play various audio and video content.
  • a CPU processor may include multiple processors. For example, including a main processor and one or more sub-processors.
  • the graphics processor is configured to generate various graphic objects, such as at least one of icons, operation menus, and user input instruction display graphics.
  • the graphics processor includes an arithmetic unit, which performs calculations by receiving various interactive instructions input by users, and displays various objects according to display attributes; it also includes a renderer, which renders various objects obtained based on the arithmetic unit, and the above-mentioned rendered objects are used to be displayed on the display.
  • the video processor is used to receive an external video signal and perform video decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, image synthesis, etc. according to the standard codec protocol of the input signal. At least one of the processing can obtain a signal that can be directly displayed or played on the display device 200 .
  • the video processor includes at least one of a demultiplexing module, a video decoding module, an image synthesis module, a frame rate conversion module, a display formatting module, and the like.
  • the demultiplexing module is used for demultiplexing the input audio and video data streams.
  • the video decoding module is used to process the demultiplexed video signal, including decoding and scaling.
  • An image synthesis module such as an image synthesizer, is used to superimpose and mix the graphic generator with the zoomed video image according to the GUI signal input by the user or generated by itself, so as to generate an image signal available for display.
  • the frame rate conversion module is used for converting the input video frame rate.
  • the display formatting module is used to convert the received frame rate to the video output signal, and change the signal to conform to the display format signal, such as outputting RGB data signal.
  • the audio processor is used to receive an external audio signal, perform decompression and decoding according to the standard codec protocol of the input signal, and perform at least one of processing such as noise reduction, digital-to-analog conversion, and amplification processing , to obtain a sound signal that can be played on a loudspeaker.
  • the user can input user commands through a graphical user interface (GUI) displayed on the display 260, and the user input interface receives user input commands through the graphical user interface (GUI).
  • GUI graphical user interface
  • the user may input a user command by inputting a specific sound or gesture, and the user input interface recognizes the sound or gesture through a sensor to receive the user input command.
  • "user interface” is a medium interface for interaction and information exchange between an application program or an operating system and a user, and it realizes the conversion between the internal form of information and the form acceptable to the user.
  • the commonly used form of user interface is the graphical user interface (Graphic User Interface, GUI), which refers to the user interface related to computer operation displayed in a graphical way. It can be an icon, window, control and other interface elements displayed on the display screen of the electronic device, where the control can include icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, widgets, etc. At least one of the view's interface elements.
  • GUI graphical User Interface
  • the user interface 280 is an interface that can be used to receive control input (such as: physical buttons on the display device body, or others).
  • the system of the display device may include a kernel (Kernel), a command parser (shell), a file system and application programs.
  • kernel Kernel
  • shell command parser
  • file system and application programs.
  • the kernel, shell, and file system make up the basic operating system structure, and they allow users to manage files, run programs, and use the system.
  • the kernel starts, activates the kernel space, abstracts hardware, initializes hardware parameters, etc., runs and maintains virtual memory, scheduler, signal and inter-process communication (IPC).
  • IPC inter-process communication
  • the Shell and user applications are loaded.
  • the application is started, it is compiled into machine code to form a process.
  • Fig. 4 is a schematic diagram of software configuration in a display device according to an embodiment of the present application. As shown in Fig. 4, the system is divided into four layers, from top to bottom are respectively the application program (Applications) layer (referred to as “application layer”), the application Application Framework layer (referred to as “framework layer”), Android runtime (Android runtime) and system library layer (referred to as “system runtime layer”), and the kernel layer.
  • Applications Applications
  • frame layer application Application Framework layer
  • Android runtime Android runtime
  • system library layer referred to as “system runtime layer”
  • kernel layer the kernel layer.
  • the kernel layer contains at least one of the following drivers: audio driver, display driver, Bluetooth driver, camera driver, wireless fidelity (Wireless Fidelity, WIFI) driver, universal serial bus (Universal Serial Bus, USB) driver, high-definition multimedia Interface (High Definition Multimedia Interface, HDMI) driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power driver, etc.
  • audio driver display driver
  • Bluetooth driver camera driver
  • wireless fidelity Wireless Fidelity, WIFI
  • USB Universal Serial Bus
  • HDMI High Definition Multimedia Interface
  • sensor driver such as fingerprint sensor, temperature sensor, pressure sensor, etc.
  • power driver etc.
  • Fig. 5 is a schematic diagram showing the icon control interface of the application program in the display device according to the embodiment of the present application.
  • the application program layer includes at least one application program that can display the corresponding icon control on the display, such as: live TV App Icon Control, VOD App Icon Control, Media Center App Icon Control, App Center Icon Control, Gaming App Icon Control, etc.
  • the LCD partition backlight processing module enhances the brightness and color contrast of the image displayed on the LCD by adopting the regional light control technology and the method of increasing the peak brightness of the local partition, and improves the display effect of the image.
  • LCD's system-on-chip (SOC) compensates the display image, but it is only limited to the compensation effect of the area light control technology, and it cannot actually adapt to the image change after the peak brightness is increased, resulting in the color of the image becoming lighter. , affecting the display effect of the image.
  • the application provides a display device, an image processing method and a device, and the compensation parameter is determined by using the backlight gain parameter returned by the sub-area backlight processing module, so that the compensation parameter can be determined according to
  • the compensation parameters and the image signal to be displayed obtain the compensated image signal, dynamically compensate the chroma of the image, optimize the color brightness of the image to be displayed, and improve the display effect of the image.
  • FIG. 6 is a schematic structural diagram of a display device according to an embodiment of the present application.
  • the display device includes a controller and a display.
  • the controller includes an image processing unit, a backlight driving unit and a display unit.
  • the image processing unit includes an image processing module, which is a functional unit in the system chip of the display device, and is used to perform image processing on the image signal.
  • the backlight drive unit includes a sub-area backlight processing module and a pulse-width modulation (Pulse-width modulation, PWM) drive control module, specifically for driving the backlight assembly as a microcontroller for controlling the display of the backlight assembly.
  • PWM pulse-width modulation
  • the display unit includes a timing control module, a liquid crystal panel and a backlight assembly for displaying images.
  • the image processing module in the image processing unit processes the received image signal to obtain the backlight values of all partitions in the backlight assembly; on the other hand, the image processing module also determines the The image signal of the image to be displayed; the image processing module also transmits the backlight values of all partitions to the backlight drive unit.
  • the partition backlight processing module in the backlight drive unit determines the backlight gain parameters according to the backlight values of all partitions, and returns the backlight gain parameters to the image processing module, so that the image processing module determines the display to be displayed according to the backlight gain parameter adjustment.
  • the image signal of the image, and the timing control signal for the image to be displayed according to the adjusted image signal of the image to be displayed, and the timing control signal is sent to the display unit, so that the timing control module in the display unit is controlled according to the timing control signal
  • the partition backlight processing module in the backlight drive unit also generates a PWM drive signal according to the backlight gain parameters and the backlight values of all partitions, and transmits the PWM drive signal to the PWM drive control module, so that the PWM drive control module according to The PWM driving signal controls the display brightness of all LEDs in the backlight assembly.
  • FIG. 7 is a first schematic flow diagram of an image processing method according to an embodiment of the present application.
  • the execution subject of this embodiment may be the controller in the embodiment shown in FIG. 6 .
  • the method includes:
  • S701 Obtain backlight values of all partitions according to image signals, and obtain image signals of an image to be displayed according to the backlight values of all partitions.
  • the backlight optical model storage unit is pre-stored in the image processing module, and the backlight optical model storage unit can obtain image signals of the image to be displayed according to the backlight values of all partitions.
  • the backlight values of all partitions in the backlight assembly are obtained by performing statistics on gray scale partitions of the received image signals.
  • the pre-stored backlight optical model is the light diffusion model. According to the backlight values corresponding to different position partitions and the light diffusion model corresponding to different position partitions, the independent lighting function of each partition is realized, that is, the pixel brightness values of the images to be displayed corresponding to all partitions are obtained.
  • brightness compensation is performed on the image signals corresponding to all subregions to increase the pixel brightness value of each pixel in the image to be displayed.
  • the backlight assembly includes M*N partitions in total, and M and N are respectively position information of all partitions included in the backlight assembly.
  • FIG. 8 is a schematic diagram of displaying backlight values by zones of a backlight assembly according to an embodiment of the present application.
  • the backlight assembly according to the embodiment of the present application includes 6 rows and 8 columns of partitions, and the serial number of each partition can be determined according to the row number and column number of each partition. For example, the serial number corresponding to the partition in row 3 and column 4 is 20. According to the obtained backlight values of all partitions in the backlight assembly, the backlight value corresponding to the partition with the serial number 20 is determined to be 128.
  • S702 Send the backlight values of all partitions to the partition backlight processing module, so that the partition backlight processing module obtains backlight gain parameters according to the backlight values of all partitions, wherein the partition backlight processing module is used to drive the backlight display of the backlight assembly.
  • the partitioned backlight processing module is a functional module in the backlight drive unit that realizes compensation of the backlight values of all partitions.
  • the backlight drive unit is provided by a microcontroller, and the partition backlight processing module is used to determine the duty ratio of the PWM drive module corresponding to each partition according to the backlight values of all partitions, so that the PWM drive module in the backlight drive unit controls each of the backlight components.
  • the display brightness of the LEDs corresponding to the partitions controls the display brightness of the backlight assembly.
  • the partition backlight processing module obtains an average backlight value of all partitions according to the backlight values of all partitions, and obtains a backlight gain parameter according to the obtained average backlight value.
  • the peak brightness compensation is performed according to the average backlight value of all partitions, that is, the backlight gain parameter corresponding to the average backlight value is determined according to the peak backlight gain curve.
  • FIG. 9 is a schematic diagram of a peak backlight gain curve according to an embodiment of the present application. Wherein, the abscissa represents the average backlight value, and the ordinate represents the backlight gain parameter.
  • the average backlight value of all partitions in FIG. 8 is 128, and the backlight gain parameter corresponding to the average backlight value of 128 can be determined according to the peak backlight gain curve in FIG. 9 .
  • S703 Receive the backlight gain parameter returned by the partition backlight processing module, determine the compensation parameter according to the backlight gain parameter, and obtain the compensated image signal according to the compensation parameter and the image signal.
  • the compensation parameter corresponding to the backlight gain parameter can optionally be determined according to a preset mapping table.
  • the mapping relationship between the backlight gain parameter and the compensation parameter is given in the preset mapping table.
  • Compensation parameters Micro color compensation parameters.
  • the preset mapping table can be initially set according to experience, and the corresponding relationship between the backlight gain parameter and the compensation parameter is given.
  • a compensated image signal is obtained according to the compensation parameter and the image signal.
  • a timing control signal is then generated according to the compensated image signal, so that the timing controller drives the image display of the liquid crystal panel according to the timing control signal, and the tester determines adjustment parameters according to the displayed image.
  • the preset mapping table is adjusted according to the adjustment parameters, so that the mapping relationship between the backlight gain parameter and the compensation parameter in the preset mapping table is more in line with the display requirements of the image.
  • the compensation parameter corresponding to the backlight gain parameter may also be determined according to the peak brightness compensation curve.
  • FIG. 10 is a schematic diagram of a peak brightness compensation curve according to an embodiment of the present application.
  • a chromaticity debugging device is used to debug a display device to obtain a standard chromaticity value of the display device.
  • the chroma debugging device is CA-310 or CA-410.
  • the compensation parameter is set Adjust to make the current display chromaticity reach the target chromaticity value, determine the corresponding compensation parameter at this time as the compensation parameter threshold, and use the maximum value of the backlight gain parameter as the backlight gain parameter threshold.
  • a target parameter is determined according to the backlight gain parameter threshold and the compensation parameter threshold, and a peak brightness compensation curve is generated according to the target parameter.
  • the backlight gain parameter threshold m is taken as the abscissa
  • the compensation parameter threshold n is taken as the ordinate
  • the target coordinates (m, n) corresponding to a target parameter are determined according to the backlight gain parameter threshold and the compensation parameter threshold
  • the corresponding target coordinates are determined according to the target coordinates.
  • the base a of the logarithmic function curve is used as the peak brightness compensation curve.
  • x is greater than or equal to 1
  • y is greater than or equal to 1.
  • a compensated image signal is obtained according to the compensation parameter and the image signal.
  • a timing control signal is then generated according to the compensated image signal, so that the timing controller drives the image display of the liquid crystal panel according to the timing control signal, and the tester determines adjustment parameters according to the displayed image.
  • the peak brightness compensation curve is adjusted according to the adjustment parameters, so that the corresponding relationship between the backlight gain parameter and the compensation parameter in the peak brightness compensation curve is more in line with the display requirements of the image.
  • the image processing method provided in this embodiment determines the compensation parameters according to the backlight gain parameters returned by the partitioned backlight processing module, so that the compensated image signal can be obtained according to the compensation parameters and the image signal to be displayed, and the chromaticity of the image can be dynamically compensated to optimize the The color brightness of the image to be displayed is improved, and the display effect of the image is improved.
  • FIG. 11 is a second schematic flowchart of an image processing method according to an embodiment of the present application. As shown in Figure 11, the image processing method according to the embodiment of the present application is as follows:
  • S1101 Perform image quality enhancement processing on the image signal, and obtain location information of all partitions to be enhanced corresponding to preset image information to be enhanced.
  • image processing is performed on the image signal to obtain an image to be displayed, and image quality enhancement processing is performed on the image to be displayed.
  • the image quality enhancement process is to purposely emphasize the overall or local characteristics of the image, to make the original unclear image clear or to emphasize some interesting features, to expand the difference between different object features in the image, and to suppress Features that are not of interest can improve image quality, enrich information, enhance image interpretation and recognition, and meet the needs of some special analysis.
  • image quality enhancement processing is performed on the image to be displayed, and the color that needs to be enhanced is accurately applied to the image, for example, the color to be enhanced is identified in the image to be displayed, such as the blue sky, green trees, and close-range human face skin color. The corresponding partition location.
  • S1102 Obtain the backlight values of all partitions according to the image signal, and obtain the image signal of the image to be displayed according to the backlight values of all partitions; send the backlight values of all partitions to the partition backlight processing module, so that the partition backlight processing module according to the backlight of all partitions obtain the backlight gain parameter, wherein the partitioned backlight processing module is used to drive the backlight display of the backlight assembly; receive the backlight gain parameter returned by the partitioned backlight processing module, and determine the compensation parameter according to the backlight gain parameter.
  • This step is consistent with the method and effect of S701 to S703 in the embodiment of FIG. 7 , and will not be repeated here.
  • S1103 Determine the image signal of the region to be enhanced according to the location information corresponding to all the partitions to be enhanced, and obtain the compensated image signal corresponding to the region to be enhanced according to the compensation parameters and the image signal of the region to be enhanced.
  • the image signal of the region to be enhanced is determined according to the location information corresponding to all partitions to be enhanced, and according to the compensation parameters and the region to be enhanced.
  • the image signal of the to-be-enhanced area determines the color-compensated image signal corresponding to the area to be enhanced.
  • the number of all partitions to be enhanced can be determined according to the position information corresponding to all partitions to be enhanced, and the scale coefficient can be determined according to the number of all partitions to be enhanced and the number of all partitions; if the scale coefficient is greater than or equal to the preset If the percentage is set, the compensated image signal corresponding to the region to be enhanced is obtained according to the compensation parameter and the image signal of the region to be enhanced, otherwise the compensated image signal is obtained according to the compensation parameter and the image signal.
  • the proportional coefficient of the number of all subregions are greater than or equal to a preset percentage, it means that the image displayed by the subregion to be enhanced is a more important image among the images to be displayed.
  • the proportional coefficient is smaller than the preset percentage, it means that the image to be displayed by the sub-area to be enhanced occupies a relatively small proportion in the image to be displayed. Therefore, the color compensation can be performed on the more important images in the displayed images, and the efficiency and effect of the color compensation can be improved.
  • the preset percentage is 30%.
  • the image processing method provided in this embodiment obtains the image signal of the area to be enhanced by using the image quality enhancement processing algorithm, and determines to obtain the compensated image signal corresponding to the area to be enhanced according to the compensation parameters and the image signal of the area to be enhanced.
  • the color of the enhanced area is compensated to achieve the effect of local enhancement of the image, optimize the color brightness of the image to be displayed, and improve the display effect of the image.
  • FIG. 12 is a schematic structural diagram of an image processing device according to an embodiment of the present application. As shown in FIG. 12 , the image processing device includes: an obtaining module 1201 , a sending module 1202 and a receiving module 1203 .
  • Obtaining module 1201 configured to obtain backlight values of all partitions according to image signals, and obtain image signals of images to be displayed according to the backlight values of all partitions;
  • the sending module 1202 is configured to send the backlight values of all partitions to the partition backlight processing module, so that the partition backlight processing module obtains backlight gain parameters according to the backlight values of all partitions, wherein the partition backlight processing module is used to Driving the backlight display of the backlight assembly;
  • the receiving module 1203 is configured to receive the backlight gain parameter returned by the sub-area backlight processing module, determine a compensation parameter according to the backlight gain parameter, and obtain a compensated image signal according to the compensation parameter and the image signal.
  • the receiving module 1203 is specifically configured to determine the compensation parameter corresponding to the backlight gain parameter according to a preset mapping table; or, determine the compensation parameter corresponding to the backlight gain parameter according to a peak brightness compensation curve.
  • the image processing device further includes a determination module, configured to determine the maximum value of the backlight gain parameter as the backlight gain parameter threshold, and determine the backlight gain according to the target chromaticity value A compensation parameter threshold of a parameter threshold, wherein the target chromaticity value is a standard chromaticity value of the display device; a target parameter is determined according to the backlight gain parameter threshold and the compensation parameter threshold, and a peak value is generated according to the target parameter A brightness compensation curve, wherein the peak brightness compensation curve is a logarithmic function curve, and the target parameter is the base number of the peak brightness compensation curve.
  • a determination module configured to determine the maximum value of the backlight gain parameter as the backlight gain parameter threshold, and determine the backlight gain according to the target chromaticity value A compensation parameter threshold of a parameter threshold, wherein the target chromaticity value is a standard chromaticity value of the display device; a target parameter is determined according to the backlight gain parameter threshold and the compensation parameter threshold, and a peak value is generated according to the target parameter
  • the image processing device further includes an adjustment module, the adjustment module is used to generate a timing control signal according to the compensated image signal, so that the timing controller Drive the image display of the LCD panel;
  • An adjustment parameter is determined according to the image displayed on the liquid crystal panel, and the preset mapping table or the peak brightness compensation curve is adjusted according to the adjustment parameter.
  • the image processing device further includes a processing module, the processing module is used to perform image quality enhancement processing on the image signal, and obtain all information to be enhanced corresponding to the preset image information to be enhanced. Enhanced partition location information.
  • the image processing device further includes a determination module, the determination module is used to determine the image signal of the area to be enhanced according to the position information corresponding to all the partitions to be enhanced; according to the compensation The parameters and the image signal of the region to be enhanced are determined to obtain a compensated image signal corresponding to the region to be enhanced.

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Abstract

一种显示设备、图像处理方法及装置，显示设备包括控制器和显示器，控制器被配置为：根据影像信号获得所有分区的背光值，并根据所有分区的背光值获得待显示图像的图像信号；将所有分区的背光值发送至分区背光处理模块，使得分区背光处理模块根据所有分区的背光值获得背光增益参数，其中分区背光处理模块用于驱动背光组件的背光显示；接收分区背光处理模块返回的背光增益参数，根据背光增益参数确定补偿参数，并根据补偿参数以及图像信号获得补偿后的图像信号。该图像处理方法，动态补偿图像的色度，优化了待显示图像的色彩亮度，提高了显示设备的图像显示效果。

Description

一种显示设备、图像处理方法及装置
相关申请的交叉引用
本申请要求在2021年12月24日提交中国专利局、申请号为202111605368.7、申请名称为“一种显示设备、图像处理方法及装置”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
本申请实施例涉及显示技术领域。更具体地讲，涉及一种显示设备、图像处理方法及装置。
背景技术
随着液晶显示器(Liquid Crystal Display，LCD)产品的不断提升，LCD不仅实现了4K级别画面显示以及更宽广的颜色领域显示，还具备影像颜色再现性、色彩度高、图像亮度高等优点。
相关技术中，LCD的分区背光处理模块通过采用区域控光技术以及提升局部分区的峰值亮度的方法，增强了LCD显示的图像的亮度和色彩的对比度，提升了图像的显示效果。
然而，提升了LCD的背光亮度之后，会导致图像的色彩变淡，影响图像的显示效果。
发明内容
本申请提供一种显示设备、图像处理方法及装置，解决了相关技术中图像的色彩变淡的问题，优化了待显示图像的色彩亮度，提高了图像的显示效果。
本申请实施例提供一种显示设备，包括：控制器，被配置为：根据影像信号获得所有分区的背光值，并根据所述所有分区的背光值获得待显示图像 的图像信号；将所述所有分区的背光值发送至分区背光处理模块，使得所述分区背光处理模块根据所述所有分区的背光值获得背光增益参数，其中所述分区背光处理模块用于驱动背光组件的背光显示；接收所述分区背光处理模块返回的背光增益参数，根据所述背光增益参数确定补偿参数，并根据所述补偿参数以及所述图像信号获得补偿后的图像信号；与所述控制器连接的显示器，用于显示补偿后图像。
在一种实施方式中，所述控制器被配置为，在执行所述根据所述背光增益参数确定补偿参数时，所述控制器被配置为：根据预设映射表确定所述背光增益参数对应的补偿参数；或，根据峰值亮度补偿曲线确定所述背光增益参数对应的补偿参数。
在一种实施方式中，在执行所述根据峰值亮度补偿曲线确定所述背光增益参数对应的补偿参数之前，所述控制器还被配置为：将所述背光增益参数的最大值确定为背光增益参数阈值，并根据目标色度值确定所述背光增益参数阈值的补偿参数阈值，其中所述目标色度值为所述显示设备的标准色度值；
根据所述背光增益参数阈值以及所述补偿参数阈值确定目标参数，并根据所述目标参数生成峰值亮度补偿曲线，其中所述峰值亮度补偿曲线为对数函数曲线，所述目标参数为所述峰值亮度补偿曲线的底数。
在一种实施方式中，在执行所述根据所述补偿参数以及所述图像信号获得补偿后的图像信号之后，所述控制器还被配置为：根据所述补偿后的图像信号生成时序控制信号，使得时序控制器根据所述时序控制信号驱动液晶面板的图像显示；根据所述液晶面板中显示的图像确定调整参数，并根据所述调整参数对所述预设映射表或所述峰值亮度补偿曲线进行调整。
在一种实施方式中，在执行所述根据影像信号获得所有分区的背光值之前，所述控制器还被配置为：对所述影像信号进行图像画质增强处理，获得预设待增强图像信息对应的所有待增强分区的位置信息；在执行所述根据所述背光增益参数确定补偿参数之后，所述控制器还被配置为：根据所述所有待增强分区对应的位置信息确定待增强区域的图像信号；根据所述补偿参数 以及所述待增强区域的图像信号获得所述待增强区域对应的补偿后的图像信号。
在一种实施方式中，在执行所述根据所述补偿参数以及所述所有待增强分区的位置信息确定所述所有待增强分区的图像信号之前，所述控制器还被配置为：根据所述所有待增强分区对应的位置信息确定所有待增强分区的数量，并根据所述所有待增强分区的数量以及所有分区数量确定比例系数；所述控制器还被配置为：若所述比例系数大于或者等于预设百分比，则根据所述补偿参数以及所述待增强区域的图像信号获得所述待增强区域对应的补偿后的图像信号；否则，根据所述补偿参数以及所述图像信号获得补偿后的图像信号。
在一种实施方式中，所述补偿参数为色度补偿参数。
本申请实施例提供一种用于显示设备的图像处理方法，包括：根据影像信号获得所有分区的背光值，并根据所述所有分区的背光值获得待显示图像的图像信号；将所述所有分区的背光值发送至分区背光处理模块，使得所述分区背光处理模块根据所述所有分区的背光值获得背光增益参数，其中所述分区背光处理模块用于驱动背光组件的背光显示；接收所述分区背光处理模块返回的背光增益参数，根据所述背光增益参数确定补偿参数，并根据所述补偿参数以及所述图像信号获得补偿后的图像信号。
附图说明
图1为根据本申请实施方式的显示设备与控制装置之间操作场景的示意图；
图2为根据本申请实施方式的控制装置100的硬件配置框图；
图3为根据本申请实施方式的显示设备200的硬件配置框图；
图4为根据本申请实施方式的显示设备中软件配置示意图；
图5为根据本申请实施方式的显示设备中应用程序的图标控件界面显示示意图；
图6为根据本申请实施方式的显示设备的结构示意图；
图7为根据本申请实施方式的图像处理方法的流程示意图一；
图8为根据本申请实施方式的背光组件的分区背光值显示示意图；
图9为根据本申请实施方式的峰值背光增益曲线示意图；
图10为根据本申请实施方式的峰值亮度补偿曲线示意图；
图11为根据本申请实施方式的图像处理方法的流程示意图二；
图12为根据本申请实施方式的图像处理装置的结构示意图。
具体实施方式
为使本申请的目的、实施方式和优点更加清楚，下面将结合本申请示例性实施例中的附图，对本申请示例性实施方式进行清楚、完整地描述，显然，所描述的示例性实施例仅是本申请一部分实施例，而不是全部的实施例。
基于本申请描述的示例性实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请所附权利要求保护的范围。此外，虽然本申请中公开内容按照示范性一个或几个实例来介绍，但应理解，可以就这些公开内容的各个方面也可以单独构成一个完整实施方式。
图1为根据本申请实施方式的显示设备与控制装置之间操作场景的示意图，如图1所示，用户可通过移动终端300和控制设备200操作显示设备100。控制设备200可以是遥控器，遥控器和显示设备的通信包括红外协议通信、蓝牙协议通信，无线或其他有线方式来控制显示设备100。用户可以通过遥控器上按键，语音输入、控制面板输入等输入用户指令，来控制显示设备100。在一些实施例中，也可以使用移动终端、平板电脑、计算机、笔记本电脑、和其他智能设备以控制显示设备100。
图2为根据本申请实施方式的控制装置100的配置框图。如图2所示，控制装置100包括控制器110、通信接口130、用户输入/输出接口140、存储器、供电电源。控制装置100可接收用户的输入操作指令，且将操作指令转换为显示设备200可识别和响应的指令，起用用户与显示设备200之间交互 中介作用。
在一些实施例中，通信接口130用于和外部通信，包含WIFI芯片，蓝牙模块，NFC或可替代模块中的至少一种。
在一些实施例中，用户输入/输出接口140包含麦克风，触摸板，传感器，按键或可替代模块中的至少一种。
图3为根据本申请实施方式的显示设备200的硬件配置框图。
在一些实施例中，显示设备200包括调谐解调器210、通信器220、检测器230、外部装置接口240、控制器250、显示器260、音频输出接口270、存储器、供电电源、用户接口中的至少一种。
在一些实施例中控制器包括中央处理器，视频处理器，音频处理器，图形处理器，RAM，ROM，用于输入/输出的第一接口至第n接口。
在一些实施例中，显示器260包括用于呈现画面的显示屏组件，以及驱动图像显示的驱动组件，用于接收源自控制器输出的图像信号，进行显示视频内容、图像内容以及菜单操控界面的组件以及用户操控UI界面等。
在一些实施例中，显示器260可为液晶显示器、OLED显示器、以及投影显示器中的至少一种，还可以为一种投影装置和投影屏幕。
在一些实施例中，调谐解调器210通过有线或无线接收方式接收广播电视信号，以及从多个无线或有线广播电视信号中解调出音视频信号，如以及EPG数据信号。
在一些实施例中，通信器220是用于根据各种通信协议类型与外部设备或服务器进行通信的组件。例如：通信器可以包括Wifi模块，蓝牙模块，有线以太网模块等其他网络通信协议芯片或近场通信协议芯片，以及红外接收器中的至少一种。显示设备200可以通过通信器220与控制装置100或服务器400建立控制信号和数据信号的发送和接收。
在一些实施例中，检测器230用于采集外部环境或与外部交互的信号。例如，检测器230包括光接收器，用于采集环境光线强度的传感器；或者，检测器230包括图像采集器，如摄像头，可以用于采集外部环境场景、用户 的属性或用户交互手势，再或者，检测器230包括声音采集器，如麦克风等，用于接收外部声音。
在一些实施例中，外部装置接口240可以包括但不限于如下：高清多媒体接口接口(HDMI)、模拟或数据高清分量输入接口(分量)、复合视频输入接口(CVBS)、USB输入接口(USB)、RGB端口等任一个或多个接口。也可以是上述多个接口形成的复合性的输入/输出接口。
在一些实施例中，控制器250和调谐解调器210可以位于不同的分体设备中，即调谐解调器210也可在控制器250所在的主体设备的外置设备中，如外置机顶盒等。
在一些实施例中，控制器250，通过存储在存储器上中各种软件控制程序，来控制显示设备的工作和响应用户的操作。控制器250控制显示设备200的整体操作。例如：响应于接收到用于选择在显示器260上显示UI对象的用户命令，控制器250便可以执行与由用户命令选择的对象有关的操作。
在一些实施例中，所述对象可以是可选对象中的任何一个，例如超链接、图标或其他可操作的控件。与所选择的对象有关操作有：显示连接到超链接页面、文档、图像等操作，或者执行与所述图标相对应程序的操作。
在一些实施例中控制器包括中央处理器(Central Processing Unit，CPU)，视频处理器，音频处理器，图形处理器(Graphics Processing Unit，GPU)，RAM Random Access Memory，RAM)，ROM(Read-Only Memory,ROM)，用于输入/输出的第一接口至第n接口，通信总线(Bus)等中的至少一种。
CPU处理器。用于执行存储在存储器中操作系统和应用程序指令，以及根据接收外部输入的各种交互指令，来执行各种应用程序、数据和内容，以便最终显示和播放各种音视频内容。CPU处理器，可以包括多个处理器。如，包括一个主处理器以及一个或多个子处理器。
在一些实施例中，图形处理器，用于产生各种图形对象，如：图标、操作菜单、以及用户输入指令显示图形等中的至少一种。图形处理器包括运算器，通过接收用户输入各种交互指令进行运算，根据显示属性显示各种对象； 还包括渲染器，对基于运算器得到的各种对象，进行渲染，上述渲染后的对象用于显示在显示器上。
在一些实施例中，视频处理器，用于将接收外部视频信号，根据输入信号的标准编解码协议，进行解压缩、解码、缩放、降噪、帧率转换、分辨率转换、图像合成等视频处理中的至少一种，可得到直接可显示设备200上显示或播放的信号。
在一些实施例中，视频处理器，包括解复用模块、视频解码模块、图像合成模块、帧率转换模块、显示格式化模块等中的至少一种。其中，解复用模块，用于对输入音视频数据流进行解复用处理。视频解码模块，用于对解复用后的视频信号进行处理，包括解码和缩放处理等。图像合成模块，如图像合成器，其用于将图形生成器根据用户输入或自身生成的GUI信号，与缩放处理后视频图像进行叠加混合处理，以生成可供显示的图像信号。帧率转换模块，用于对转换输入视频帧率。显示格式化模块，用于将接收帧率转换后视频输出信号，改变信号以符合显示格式的信号，如输出RGB数据信号。
在一些实施例中，音频处理器，用于接收外部的音频信号，根据输入信号的标准编解码协议，进行解压缩和解码，以及降噪、数模转换、和放大处理等处理中的至少一种，得到可以在扬声器中播放的声音信号。
在一些实施例中，用户可在显示器260上显示的图形用户界面(GUI)输入用户命令，则用户输入接口通过图形用户界面(GUI)接收用户输入命令。或者，用户可通过输入特定的声音或手势进行输入用户命令，则用户输入接口通过传感器识别出声音或手势，来接收用户输入命令。
在一些实施例中，“用户界面”，是应用程序或操作系统与用户之间进行交互和信息交换的介质接口，它实现信息的内部形式与用户可以接受形式之间的转换。用户界面常用的表现形式是图形用户界面(Graphic User Interface，GUI)，是指采用图形方式显示的与计算机操作相关的用户界面。它可以是在电子设备的显示屏中显示的一个图标、窗口、控件等界面元素，其中控件可以包括图标、按钮、菜单、选项卡、文本框、对话框、状态栏、导航栏、Widget 等可视的界面元素中的至少一种。
在一些实施例中，用户接口280，为可用于接收控制输入的接口(如：显示设备本体上的实体按键，或其他等)。
在一些实施例中，显示设备的系统可以包括内核(Kernel)、命令解析器(shell)、文件系统和应用程序。内核、shell和文件系统一起组成了基本的操作系统结构，它们让用户可以管理文件、运行程序并使用系统。上电后，内核启动，激活内核空间，抽象硬件、初始化硬件参数等，运行并维护虚拟内存、调度器、信号及进程间通信(IPC)。内核启动后，再加载Shell和用户应用程序。应用程序在启动后被编译成机器码，形成一个进程。
图4为根据本申请实施方式的显示设备中软件配置示意图，如图4所示，将系统分为四层，从上至下分别为应用程序(Applications)层(简称“应用层”)，应用程序框架(Application Framework)层(简称“框架层”)，安卓运行时(Android runtime)和系统库层(简称“系统运行库层”)，以及内核层。内核层至少包含以下驱动中的至少一种：音频驱动、显示驱动、蓝牙驱动、摄像头驱动、无线保真(Wireless Fidelity，WIFI)驱动、通用串行总线(Universal Serial Bus，USB)驱动、高清多媒体接口(High Definition Multimedia Interface，HDMI)驱动、传感器驱动(如指纹传感器，温度传感器，压力传感器等)、以及电源驱动等。
图5为根据本申请实施方式的显示设备中应用程序的图标控件界面显示示意图，如图5中所示，应用程序层包含至少一个应用程序可以在显示器中显示对应的图标控件，如：直播电视应用程序图标控件、视频点播应用程序图标控件、媒体中心应用程序图标控件、应用程序中心图标控件、游戏应用图标控件等。
LCD的分区背光处理模块通过采用区域控光技术以及提升局部分区的峰值亮度的方法，增强了LCD显示的图像的亮度和色彩的对比度，提升了图像的显示效果。LCD的系统级芯片(System on Chip，SOC)中对显示图像进行了补偿，但只是局限于区域控光技术的补偿效果，实际并不能适应峰值亮度 提升后的图像变化，导致图像的色彩变淡，影响图像的显示效果。
对现有方法中LCD显示屏显示的图像色彩变淡的问题，本申请提供了一种显示设备、图像处理方法及装置，通过利用分区背光处理模块返回的背光增益参数确定补偿参数，使得可根据补偿参数以及待显示的图像信号获得补偿后的图像信号，动态补偿图像的色度，优化了待显示图像的色彩亮度，提高了图像的显示效果。
图6为根据本申请实施方式的显示设备的结构示意图，如图6所示，根据本申请实施方式的显示设备包含控制器和显示器。具体的，控制器中包含影像处理单元、背光驱动单元以及显示单元。具体的，影像处理单元包含图像处理模块，是显示设备的系统芯片中的功能单元，用于对影像信号进行图像处理。背光驱动单元包含分区背光处理模块以及脉冲宽度调制(Pulse-width modulation，PWM)驱动控制模块，具体为驱动背光组件为微控制器，用于控制背光组件的显示。显示单元包含时序控制模块、液晶面板以及背光组件，用于显示图像。
在本申请实施例中，影像处理单元中的图像处理模块一方面根据收到的影像信号进行处理获得背光组件中所有分区的背光值；另一方面，图像处理模块还根据所有分区的背光值确定待显示图像的图像信号；图像处理模块还将所有分区的背光值传输至背光驱动单元。
在本申请实施例中，背光驱动单元中的分区背光处理模块根据所有分区的背光值确定背光增益参数，并将背光增益参数返回至图像处理模块，使得图像处理模块根据背光增益参数调整确定待显示图像的图像信号，并将根据调整后的待显示图像的图像信号待显示图像对用的时序控制信号，并将时序控制信号发送至显示单元，使得显示单元中的时序控制模块根据时序控制信号控制液晶面板的图像显示。
在本申请实施例中，背光驱动单元中的分区背光处理模块还根据背光增益参数以及所有分区的背光值生成PWM驱动信号，并将PWM驱动信号传输至PWM驱动控制模块，使得PWM驱动控制模块根据PWM驱动信号控制背 光组件中的所有发光二极管的显示亮度。
图7为根据本申请实施方式的图像处理方法的流程示意图一，本实施例的执行主体可以为图6所示实施例中的控制器。如图7所示，该方法包括：
S701：根据影像信号获得所有分区的背光值，并根据所有分区的背光值获得待显示图像的图像信号。
在本申请实施例中，在图像处理模块中预存了背光光学模型存储单元，背光光学模型存储单元可根据所有分区的背光值获得待显示图像的图像信号。通过对收到的影像信号进行图像灰阶分区统计，获得背光组件中所有分区的背光值。预存的背光光学模型即光扩散模型，根据不同位置分区对应背光值以及不同位置分区对应的光扩散模型实现每个分区的独立点亮功能，即获得所有分区对应的待显示图像的像素亮度值。
在获得了所有分区对应的图像信号之后，通过对所有分区对应的图像信号进行亮度补偿，提高待显示图像中各像素点的像素亮度值。
在本申请实施例中，背光组件共包含M*N个分区，M和N分别为背光组件包含的所有分区的位置信息。图8为根据本申请实施方式的背光组件的分区背光值显示示意图。如图8所示，根据本申请实施方式的背光组件中包含6行8列个分区，可根据每个分区的行号和列号可确定每个分区的序号。例如，第3行第4列的分区对应的序号为20。根据获取的背光组件中所有分区的背光值确定序号为20的分区对应的背光值为128。
S702：将所有分区的背光值发送至分区背光处理模块，使得分区背光处理模块根据所有分区的背光值获得背光增益参数，其中分区背光处理模块用于驱动背光组件的背光显示。
在本申请实施例中，分区背光处理模块为背光驱动单元中实现对所有分区的背光值进行补偿的功能模块。背光驱动单元由微控制器提供，分区背光处理模块用于根据所有分区的背光值确定每个分区对应的PWM驱动模块的占空比，使得背光驱动单元中的PWM驱动模块控制背光组件中每个分区对应的发光二极管的显示亮度，控制背光组件的显示亮度。
具体的，分区背光处理模块根据所有分区的背光值获得所有分区的平均背光值，并根据获得的平均背光值获得背光增益参数。具体的，根据所有分区的平均背光值进行峰值亮度补偿，即根据峰值背光增益曲线确定平均背光值对应的背光增益参数。如图9所示，图9为根据本申请实施方式的峰值背光增益曲线示意图。其中，横坐标表示平均背光值，纵坐标表示背光增益参数。图8中所有分区的平均背光值为128，则可根据图9的峰值背光增益曲线确定平均背光值为128对应的背光增益参数。
S703：接收分区背光处理模块返回的背光增益参数，根据背光增益参数确定补偿参数，并根据补偿参数以及图像信号获得补偿后的图像信号。
在本申请实施例中，可选根据预设映射表确定背光增益参数对应的补偿参数。例如，预设映射表中给出了背光增益参数与补偿参数之间的映射关系。补偿参数微色彩补偿参数。具体的，预设映射表可以根据经验进行初步设置，给出背光增益参数与补偿参数之间的对应关系。在根据背光增益参数确定补偿参数之后，根据补偿参数以及图像信号获得补偿后的图像信号。再根据补偿后的图像信号生成时序控制信号，使得时序控制器根据时序控制信号驱动液晶面板的图像显示，并使得测试人员根据显示的图像确定调整参数。根据调整参数对预设映射表进行调整，使得预设映射表中背光增益参数与补偿参数之间的映射关系更符合图像的显示要求。
在本申请实施例中，还可根据峰值亮度补偿曲线确定背光增益参数对应的补偿参数。如图10所示，图10为根据本申请实施方式的峰值亮度补偿曲线示意图。在本申请实施例中，利用色度调试设备对显示设备进行调试，获得显示设备的标准色度值。例如，色度调试设备为CA-310或CA-410。在确定了标准色度值之后，将标准色度值作为目标色度值，并设置在根据所有分区的背光值获得背光增益参数之后，通过将背光增益参数设置为最大值时，对补偿参数进行调整，以使当前的显示色度到达目标色度值，确定此时对应的补偿参数作为补偿参数阈值，将背光增益参数的最大值作为背光增益参数阈值。
在确定了背光增益参数阈值以及补偿参数阈值之后，根据背光增益参数阈值以及补偿参数阈值确定目标参数，并根据目标参数生成峰值亮度补偿曲线。具体的，将背光增益参数阈值m作为横坐标，将补偿参数阈值n作为纵坐标，根据背光增益参数阈值以及补偿参数阈值确定一个目标参数对应的目标坐标(m，n)，根据目标坐标确定对应的对数函数曲线的底数a，将该对数函数曲线作为峰值亮度补偿曲线。
第一曲线的表达式如公式(1)所示：
y＝log ax            (1)
其中，x大于或者等于1，y大于或者等于1。
在本申请实施例中，在根据峰值亮度补偿曲线确定背光增益参数对应的补偿参数之后，根据补偿参数以及图像信号获得补偿后的图像信号。再根据补偿后的图像信号生成时序控制信号，使得时序控制器根据时序控制信号驱动液晶面板的图像显示，并使得测试人员根据显示的图像确定调整参数。根据调整参数对峰值亮度补偿曲线进行调整，使得峰值亮度补偿曲线中背光增益参数与补偿参数之间的对应关系更符合图像的显示要求。
本实施例提供的图像处理方法，通过根据分区背光处理模块返回的背光增益参数确定补偿参数，使得可根据补偿参数以及待显示的图像信号获得补偿后的图像信号，动态补偿图像的色度，优化了待显示图像的色彩亮度，提高了图像的显示效果。
图11为根据本申请实施方式的图像处理方法的流程示意图二。如图11所示，根据本申请实施方式的图像处理方法如下：
S1101：对影像信号进行图像画质增强处理，获得预设待增强图像信息对应的所有待增强分区的位置信息。
在本申请实施例中，对影像信号进行图像处理获得待显示的图像，并对待显示的图像进行图像画质增强处理。具体的，图像画质增强处理是有目的地强调图像的整体或局部特性，将原来不清晰的图像变得清晰或强调某些感 兴趣的特征，扩大图像中不同物体特征之间的差别，抑制不感兴趣的特征，使之改善图像质量、丰富信息量，加强图像判读和识别效果，满足某些特殊分析的需要。在本申请实施例中，对待显示的图像进行图像画质增强处理，精准作用于图像中需要增强的颜色，例如，识别待显示图像中显示的蓝天、绿树、近景人脸肤色等待加强的颜色对应的分区位置。
S1102：根据影像信号获得所有分区的背光值，并根据所有分区的背光值获得待显示图像的图像信号；将所有分区的背光值发送至分区背光处理模块，使得分区背光处理模块根据所有分区的背光值获得背光增益参数，其中分区背光处理模块用于驱动背光组件的背光显示；接收分区背光处理模块返回的背光增益参数，根据背光增益参数确定补偿参数。
本步骤与图7实施例中S701至S703的方法和效果一致，在此不再赘述。
S1103：根据所有待增强分区对应的位置信息确定待增强区域的图像信号，并根据补偿参数以及待增强区域的图像信号获得待增强区域对应的补偿后的图像信号。
在本申请实施例中，在获得了所有需要进行色彩补偿的待增强分区对应的位置信息之后，根据所有待增强分区对应的位置信息确定待增强区域的图像信号，并根据补偿参数以及待增强区域的图像信号确定待增强区域对应的色彩补偿后的图像信号。
在确定补偿后的图像信号之前，可根据所有待增强分区对应的位置信息确定所有待增强分区的数量，并根据所有待增强分区的数量以及所有分区数量确定比例系数；若比例系数大于或者等于预设百分比，则根据补偿参数以及待增强区域的图像信号获得待增强区域对应的补偿后的图像信号，否则根据补偿参数以及图像信号获得补偿后的图像信号。具体的，若所有待增强分区的数量以及所有分区数量的比例系数大于或者等于预设百分比，说明待增强分区显示的图像为待显示图像中比较重要的图像。相反，若比例系数小于预设百分比，说明待增强分区显示的图像为待显示图像中占的比重比较小。因此可针对性的对待显示图像中比较重要的图像进行色彩补偿，提高色彩补 偿的效率以及效果。例如，预设百分比为30％。
本实施例提供的图像处理方法，通过采用图像画质增强处理算法获得待增强区域的图像信号，并根据补偿参数以及待增强区域的图像信号确定获得待增强区域对应的补偿后的图像信号，针对性的对增强区域的色彩进行补偿，实现了图像局部增强的效果，优化了待显示图像的色彩亮度，提高了图像的显示效果。
图12为根据本申请实施方式的图像处理装置的结构示意图。如图12所示，该图像处理装置包括：获得模块1201、发送模块1202及接收模块1203。
获得模块1201，用于根据影像信号获得所有分区的背光值，并根据所述所有分区的背光值获得待显示图像的图像信号；
发送模块1202，用于将所述所有分区的背光值发送至分区背光处理模块，使得所述分区背光处理模块根据所述所有分区的背光值获得背光增益参数，其中所述分区背光处理模块用于驱动背光组件的背光显示；
接收模块1203，用于接收所述分区背光处理模块返回的背光增益参数，根据所述背光增益参数确定补偿参数，并根据所述补偿参数以及所述图像信号获得补偿后的图像信号。
在一种实施方式中，所述接收模块1203具体用于根据预设映射表确定所述背光增益参数对应的补偿参数；或，根据峰值亮度补偿曲线确定所述背光增益参数对应的补偿参数。
在一种实施方式中，所述图像处理装置还包括确定模块，所述确定模块用于将所述背光增益参数的最大值确定为背光增益参数阈值，并根据目标色度值确定所述背光增益参数阈值的补偿参数阈值，其中所述目标色度值为所述显示设备的标准色度值；根据所述背光增益参数阈值以及所述补偿参数阈值确定目标参数，并根据所述目标参数生成峰值亮度补偿曲线，其中所述峰值亮度补偿曲线为对数函数曲线，所述目标参数为所述峰值亮度补偿曲线的底数。
在一种实施方式中，根据本申请实施方式的图像处理装置还包括调整模 块，所述调整模块用于根据所述补偿后的图像信号生成时序控制信号，使得时序控制器根据所述时序控制信号驱动液晶面板的图像显示；
根据所述液晶面板中显示的图像确定调整参数，并根据所述调整参数对所述预设映射表或所述峰值亮度补偿曲线进行调整。
在一种实施方式中，根据本申请实施方式的图像处理装置还包括处理模块，所述处理模块用于对所述影像信号进行图像画质增强处理，获得预设待增强图像信息对应的所有待增强分区的位置信息。
在一种实施方式中，根据本申请实施方式的图像处理装置还包括确定模块，所述确定模块用于根据所述所有待增强分区对应的位置信息确定待增强区域的图像信号；根据所述补偿参数以及所述待增强区域的图像信号确定获得所述待增强区域对应的补偿后的图像信号。
为了方便解释，已经结合具体的实施方式进行了上述说明。但是，上述示例性的讨论不是意图穷尽或者将实施方式限定到上述公开的具体形式。根据上述的教导，可以得到多种修改和变形。上述实施方式的选择和描述是为了更好的解释原理以及实际的应用，从而使得本领域技术人员更好的使用实施方式以及适于具体使用考虑的各种不同的变形的实施方式。

Claims (8)

  1. 一种显示设备，包括：
    控制器，被配置为：
    根据影像信号获得所有分区的背光值，并根据所述所有分区的背光值获得待显示图像的图像信号；
    将所述所有分区的背光值发送至分区背光处理模块，使得所述分区背光处理模块根据所述所有分区的背光值获得背光增益参数，其中所述分区背光处理模块用于驱动背光组件的背光显示；
    接收所述分区背光处理模块返回的背光增益参数，根据所述背光增益参数确定补偿参数，并根据所述补偿参数以及所述图像信号获得补偿后的图像信号；
    与所述控制器连接的显示器，用于显示补偿后图像。
  2. 根据权利要求1所述的显示设备，在执行所述根据所述背光增益参数确定补偿参数时，所述控制器被配置为：
    根据预设映射表确定所述背光增益参数对应的补偿参数；
    或，
    根据峰值亮度补偿曲线确定所述背光增益参数对应的补偿参数。
  3. 根据权利要求2所述的显示设备，在执行所述根据峰值亮度补偿曲线确定所述背光增益参数对应的补偿参数之前，所述控制器还被配置为：
    将所述背光增益参数的最大值确定为背光增益参数阈值，并根据目标色度值确定所述背光增益参数阈值的补偿参数阈值，其中所述目标色度值为所述显示设备的标准色度值；
    根据所述背光增益参数阈值以及所述补偿参数阈值确定目标参数，并根据所述目标参数生成峰值亮度补偿曲线，其中所述峰值亮度补偿曲线为对数函数曲线，所述目标参数为所述峰值亮度补偿曲线的底数。
  4. 根据权利要求3所述的显示设备，在执行所述根据所述补偿参数以及 所述图像信号获得补偿后的图像信号之后，所述控制器还被配置为：
    根据所述补偿后的图像信号生成时序控制信号，使得时序控制器根据所述时序控制信号驱动液晶面板的图像显示；
    根据所述液晶面板中显示的图像确定调整参数，并根据所述调整参数对所述预设映射表或所述峰值亮度补偿曲线进行调整。
  5. 根据权利要求1所述的显示设备，在执行所述根据影像信号获得所有分区的背光值之前，所述控制器还被配置为：
    对所述影像信号进行图像画质增强处理，获得预设待增强图像信息对应的所有待增强分区的位置信息；
    在执行所述根据所述背光增益参数确定补偿参数之后，所述控制器还被配置为：
    根据所述所有待增强分区对应的位置信息确定待增强区域的图像信号；
    根据所述补偿参数以及所述待增强区域的图像信号获得所述待增强区域对应的补偿后的图像信号。
  6. 根据权利要求5所述的显示设备，在执行所述根据所述补偿参数以及所述所有待增强分区的位置信息确定所述所有待增强分区的图像信号之前，所述控制器还被配置为：
    根据所述所有待增强分区对应的位置信息确定所有待增强分区的数量，并根据所述所有待增强分区的数量以及所有分区数量确定比例系数；
    所述控制器还被配置为：
    若所述比例系数大于或者等于预设百分比，则根据所述补偿参数以及所述待增强区域的图像信号获得所述待增强区域对应的补偿后的图像信号；
    否则，根据所述补偿参数以及所述图像信号获得补偿后的图像信号。
  7. 根据权利要求1至6任一项所述的显示设备，所述补偿参数为色度补偿参数。
  8. 一种用于显示设备的图像处理方法，包括：
    根据影像信号获得所有分区的背光值，并根据所述所有分区的背光值获 得待显示图像的图像信号；
    将所述所有分区的背光值发送至分区背光处理模块，使得所述分区背光处理模块根据所述所有分区的背光值获得背光增益参数，其中所述分区背光处理模块用于驱动背光组件的背光显示；
    接收所述分区背光处理模块返回的背光增益参数，根据所述背光增益参数确定补偿参数，并根据所述补偿参数以及所述图像信号获得补偿后的图像信号。
PCT/CN2022/121413 2021-12-24 2022-09-26 一种显示设备、图像处理方法及装置 Ceased WO2023116100A1 (zh)

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