CN115547265A - Display apparatus and display method - Google Patents

Display apparatus and display method Download PDF

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Publication number
CN115547265A
CN115547265A CN202110724484.4A CN202110724484A CN115547265A CN 115547265 A CN115547265 A CN 115547265A CN 202110724484 A CN202110724484 A CN 202110724484A CN 115547265 A CN115547265 A CN 115547265A
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CN
China
Prior art keywords
rgb
color
display
backlight brightness
value
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Pending
Application number
CN202110724484.4A
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Chinese (zh)
Inventor
李广卿
王烨东
沈海杰
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Hisense Visual Technology Co Ltd
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Hisense Visual Technology Co Ltd
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Priority to CN202110724484.4A priority Critical patent/CN115547265A/en
Publication of CN115547265A publication Critical patent/CN115547265A/en
Pending 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
    • 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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours

Abstract

The embodiment of the invention provides display equipment and a display method, wherein the display equipment acquires backlight brightness of a display through a controller connected with the display, and determines a color temperature compensation value having a mapping relation with the backlight brightness according to the backlight brightness and the mapping relation between the backlight brightness and the color temperature compensation value, so that color temperature compensation is carried out on pixels of the display according to the color temperature compensation value, and the color temperature of the pixels of the display after compensation is the same as the color temperature of the pixels of the display when the backlight brightness is a preset value. And further overcome the problem that the display picture of the display device is distorted due to the color temperature shift generated by the current dynamic dimming technology.

Description

Display apparatus and display method
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to display equipment and a display method.
Background
High-end display equipment (for example, liquid crystal televisions) in the market generally adopt a dynamic dimming technology, namely, backlight brightness is adjusted in different regions according to input image information so as to improve image contrast and enable black scenes to be darker and bright scenes to be brighter. The conventional dynamic dimming technique includes two parts, namely backlight adjustment and image compensation, and when the backlight is adjusted, corresponding image compensation is performed, for example, when the backlight brightness in a partition is reduced, in order to maintain high contrast, the image brightness is correspondingly improved through an image compensation algorithm.
However, the dynamic dimming technique can also bring side effects to partial light materials while improving the contrast, thereby causing color temperature shift of pixels of the display device. The color temperature shift may cause distortion problems in a display screen of the display device.
Disclosure of Invention
The embodiment of the invention provides display equipment and a display method, which are used for solving the problem that a display picture of the display equipment is distorted due to color temperature deviation generated by a dynamic dimming technology at present.
In a first aspect, an embodiment of the present invention provides a display device, including:
a display;
a controller connected with the display and configured to:
acquiring backlight brightness of the display;
determining a color temperature compensation value having a mapping relation with the backlight brightness according to the backlight brightness and the mapping relation between the backlight brightness and the color temperature compensation value;
and performing color temperature compensation on the pixels of the display according to the color temperature compensation value, so that the color temperature of the pixels of the display after compensation is the same as the color temperature of the pixels of the display when the backlight brightness is a preset value.
In some embodiments of the present application, the display comprises a plurality of sections;
the controller is specifically configured to:
acquiring the backlight brightness of each subarea of the display;
determining a color temperature compensation value having a mapping relation with the backlight brightness of each subarea according to the backlight brightness of each subarea and the mapping relation between the backlight brightness and the color temperature compensation value;
and performing color temperature compensation on the pixels of the partitions of the display according to the color temperature compensation value which has a mapping relation with the backlight brightness of the partitions.
In some embodiments of the present application, the color temperature compensation value is an RGB adjustment parameter value;
the controller is specifically configured to:
and adjusting the current RGB value of the pixel of each subarea of the display according to the RGB adjustment parameter value which has a mapping relation with the backlight brightness of each subarea so as to compensate the color temperature of the pixel of the display.
In some embodiments of the present application, the RGB adjustment parameter value has a mapping relationship with the backlight brightness of each pixel in each of the partitions; the RGB adjustment parameter values are gain values and offset values corresponding to three color components in RGB in an RGB space; the current RGB value comprises three color component values of a current RGB;
the controller is specifically configured to:
multiplying the gain value corresponding to each color component in RGB in the RGB space corresponding to each pixel in each partition by each color component value of the current RGB of the pixel to obtain a color component intermediate value of the RBG of each pixel in each partition;
and adding the intermediate value of the color component of the RBG of each pixel of each partition to the offset value corresponding to each color component in the RGB space corresponding to the pixel to obtain the component value of each color of the current RGB of each pixel of each partition after adjustment.
In some embodiments of the present application, the controller is further configured to:
acquiring RGB adjustment parameter values corresponding to pixel points of a display under backlight brightness;
and generating the mapping relation according to each backlight brightness and the corresponding RGB adjustment parameter value.
In some embodiments of the present application, the RGB adjustment parameter value has a mapping relationship with the backlight brightness of each pixel in each of the partitions; the RGB adjustment parameter values are RGB color component values in an XYZ space;
the controller is specifically configured to:
obtaining the adjustment values of the R and B components of RGB of the pixels of the partitions in the XYZ space according to the RGB color component value of each pixel in the partitions in the XYZ space and a preset white field color coordinate;
and adjusting R and B component values in RGB of each pixel point in the corresponding partition according to the adjustment values of the R and B components of RGB of the pixel of each partition in the XYZ space.
In some embodiments of the present application, the preset white field color coordinate is a corresponding white field color coordinate when the backlight brightness is the preset value;
the controller is specifically configured to:
obtaining adjustment values of the components R and B of RGB of the pixels of the partitions in the XYZ space respectively in the X-axis component in the XYZ space according to the RGB color component value of each pixel in the partitions in the XYZ space and the color coordinate X component value in the corresponding white field color coordinate when the backlight brightness is the preset value;
and obtaining the adjustment values of the y-axis components of the RGB components of the pixels of the partitions in the XYZ space respectively in the XYZ space according to the RGB color component values of the pixels in the XYZ space and the color coordinate y component value in the corresponding white field color coordinate when the backlight brightness is the preset value.
In some embodiments of the present application, the controller is specifically configured to:
inputting the RGB color component value of each pixel in each partition in the XYZ space and the color coordinate x component value in the corresponding white field color coordinate when the backlight brightness is the preset value into a preset color coordinate x algorithm to output the adjustment values of the x-axis components of the R and B components of RGB in the XYZ space of each pixel in each partition respectively;
inputting the RGB color component value of each pixel in each partition in the XYZ space and the color coordinate y component value in the corresponding white field color coordinate when the backlight brightness is the preset value into a preset color coordinate y algorithm to output the adjustment values of the y-axis components of the R and B components of RGB in the XYZ space of each pixel in each partition respectively;
wherein, the color coordinate x algorithm is as follows:
Wx255＝(RX+GX+BX)/(RX+RY+RZ+GX+GY+GZ+BX+BY+BZ)；
the color coordinate y algorithm is as follows:
Wy255＝(RY+GY+BY)/(RX+RY+RZ+GX+GY+GZ+BX+BY+BZ)；
wherein Wx255 is a color coordinate x of the preset white field, wy255 is a color coordinate y of the preset white field, RX, RY, and RZ are XYZ component values of R in an XYZ space, GX + GY + GZ are XYZ component values of G in an XYZ space, and BX + BY + BZ are XYZ component values of B in an XYZ space.
In some embodiments of the present application, the controller is further configured to:
acquiring corresponding brightness of each pixel point of the display under each backlight brightness and a corresponding color coordinate under an RGB space; the color coordinate in the RGB space is the color coordinate in the RGB space in the white field environment corresponding to the backlight brightness;
converting the brightness and the color coordinates in the RGB space into RGB color component values in an XYZ space;
and generating the mapping relation according to each backlight brightness and the corresponding RGB color component value in the XYZ space.
In a second aspect, an embodiment of the present invention provides a display method, including:
acquiring backlight brightness of a display;
determining a color temperature compensation value having a mapping relation with the backlight brightness according to the backlight brightness and the mapping relation between the backlight brightness and the color temperature compensation value;
and performing color temperature compensation on the pixels of the display according to the color temperature compensation value, so that the color temperature of the pixels of the display after compensation is the same as the color temperature of the pixels of the display when the backlight brightness is a preset value.
In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, in which computer-executable instructions are stored, and when a processor executes the computer-executable instructions, the method described in the first aspect and some embodiments of the first aspect is implemented.
In the display device and the display method provided by this embodiment, the display device obtains the backlight brightness of the display through the controller connected to the display, and determines the color temperature compensation value having a mapping relation with the backlight brightness according to the backlight brightness and the mapping relation between the backlight brightness and the color temperature compensation value, so as to perform color temperature compensation on the pixel of the display according to the color temperature compensation value, so that the color temperature compensated by the pixel of the display is the same as the color temperature of the pixel of the display when the backlight brightness is a preset value. And further overcome the problem that the display picture of the display device is distorted due to the color temperature shift generated by the current dynamic dimming technology.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on the drawings without inventive labor.
Fig. 1 is a schematic diagram illustrating an operational scenario between a display device and a control apparatus according to some embodiments;
a block diagram of a hardware configuration of a display device 200 according to some embodiments is illustrated in fig. 2;
a block diagram of the hardware configuration of the control device 100 according to some embodiments is illustrated in fig. 3;
a schematic diagram of a software configuration in a display device 200 according to some embodiments is illustrated in fig. 4;
FIG. 5 illustrates an icon control interface display diagram of an application in the display device 200, according to some embodiments;
FIG. 6 is a schematic diagram illustrating a color temperature change of a display device according to some embodiments when the brightness of the backlight is changed;
fig. 7 is a schematic diagram illustrating xy color coordinate changes of a display device according to some embodiments when backlight brightness changes;
FIG. 8 is a schematic diagram illustrating color temperature of a display device after color temperature compensation according to some embodiments;
fig. 9 is a schematic view illustrating xy color coordinates of a display device after color temperature compensation according to some embodiments;
FIG. 10 is a schematic diagram illustrating a partition of a display device according to some embodiments;
a flow diagram for color temperature compensation of a display device according to some embodiments is illustrated in fig. 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
To make the objects, embodiments and advantages of the present application clearer, the following description of exemplary embodiments of the present application will clearly and completely describe the exemplary embodiments of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application, and it is to be understood that the described exemplary embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
All other embodiments, which can be derived by a person skilled in the art from the exemplary embodiments described herein without inventive step, are intended to be within the scope of the claims appended hereto. In addition, while the disclosure herein has been presented in terms of exemplary embodiment or embodiments, it should be appreciated that individual aspects of the disclosure can be utilized in a variety of forms and embodiments.
It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.
The terms "first," "second," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between similar or analogous objects or entities and are not necessarily intended to limit the order or sequence Unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or device that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such product or device.
The term "module," as used herein, refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the functionality associated with that element.
The term "remote control" as used in this application refers to a component of an electronic device (such as the display device disclosed in this application) that is typically wirelessly controllable over a relatively short range of distances. Typically using infrared and/or Radio Frequency (RF) signals and/or bluetooth to connect with the electronic device, and may also include WiFi, wireless USB, bluetooth, motion sensor, etc. For example: the hand-held touch remote controller replaces most of the physical built-in hard keys in a common remote control device with a user interface in a touch screen.
The term "gesture" as used in this application refers to a user's behavior through a change in hand shape or an action such as hand motion to convey a desired idea, action, purpose, or result.
Fig. 1 is a schematic diagram illustrating an operation scenario between a display device and a control apparatus according to an embodiment. As shown in fig. 1, the user may operate the display device 200 through the mobile terminal 300 and the control apparatus 100.
In some embodiments, the control apparatus 100 may be a remote controller, and the communication between the remote controller and the display device includes an infrared protocol communication or a bluetooth protocol communication, and other short-distance communication methods, etc., and the display device 200 is controlled by wireless or other wired methods. The user may input a user command through a key on a remote controller, voice input, control panel input, etc. to control the display apparatus 200. Such as: the user may input a corresponding control command through a volume up/down key, a channel control key, up/down/left/right movement keys, a voice input key, a menu key, a power on/off key, etc. on the remote controller, to implement a function of controlling the display apparatus 200.
In some embodiments, mobile terminals, tablets, computers, laptops, and other smart devices may also be used to control the display device 200. For example, the display device 200 is controlled using an application program running on the smart device. The application, through configuration, may provide the user with various controls in an intuitive User Interface (UI) on a screen associated with the smart device.
In some embodiments, the mobile terminal 300 may install a software application with the display device 200 to implement connection communication through a network communication protocol for the purpose of one-to-one control operation and data communication. Such as: the mobile terminal 300 and the display device 200 can be used for establishing a control instruction protocol, synchronizing a remote control keyboard to the mobile terminal 300 and controlling the function of the display device 200 by controlling the user interface on the mobile terminal 300. The audio and video content displayed on the mobile terminal 300 can also be transmitted to the display device 200, so as to realize the synchronous display function.
As also shown in fig. 1, the display apparatus 200 also performs data communication with the server 400 through various communication means. The display device 200 may be allowed to be communicatively connected through a Local Area Network (LAN), a Wireless Local Area Network (WLAN), and other networks. The server 400 may provide various contents and interactions to the display apparatus 200. Illustratively, the display device 200 receives software program updates, or accesses a remotely stored digital media library, by sending and receiving information, as well as Electronic Program Guide (EPG) interactions. The server 400 may be a cluster or a plurality of clusters, and may include one or more types of servers. Other web service contents such as video on demand and advertisement services are provided through the server 400.
The display device 200 may be a liquid crystal display, an OLED display, or a projection display device. The particular display device type, size, resolution, etc. are not limiting, and those skilled in the art will appreciate that the display device 200 may be modified in performance and configuration as desired.
The display apparatus 200 may additionally provide an intelligent network tv function of a computer support function including, but not limited to, a network tv, an intelligent tv, an Internet Protocol Tv (IPTV), and the like, in addition to the broadcast receiving tv function.
A hardware configuration block diagram of a display device 200 according to an exemplary embodiment is exemplarily shown in fig. 2.
In some embodiments, at least one of the controller 250, the tuner demodulator 210, the communicator 220, the detector 230, the input/output interface 255, the display 275, the audio output interface 285, the memory 260, the power supply 290, the user interface 265, and the external device interface 240 is included in the display apparatus 200.
In some embodiments, a display 275 receives image signals originating from the first processor output and displays video content and images and components of the menu manipulation interface.
In some embodiments, the display 275, includes a display screen assembly for presenting a picture, and a driving assembly that drives the display of an image.
In some embodiments, the video content is displayed from broadcast television content, or alternatively, from various broadcast signals that may be received via wired or wireless communication protocols. Alternatively, various image contents received from the network communication protocol and sent from the network server side can be displayed.
In some embodiments, the display 275 is used to present a user-manipulated UI interface generated in the display apparatus 200 and used to control the display apparatus 200.
In some embodiments, a driver assembly for driving the display is also included, depending on the type of display 275.
In some embodiments, display 275 is a projection display and may also include a projection device and a projection screen.
In some embodiments, communicator 220 is a component for communicating with external devices or external servers according to various communication protocol types. For example: the communicator may include at least one of a Wifi chip, a bluetooth communication protocol chip, a wired ethernet communication protocol chip, and other network communication protocol chips or near field communication protocol chips, and an infrared receiver.
In some embodiments, the display apparatus 200 may establish control signal and data signal transmission and reception with the external control device 100 or the content providing apparatus through the communicator 220.
In some embodiments, the user interface 265 may be configured to receive infrared control signals from a control device 100 (e.g., an infrared remote control, etc.).
In some embodiments, the detector 230 is a signal used by the display device 200 to collect an external environment or interact with the outside.
In some embodiments, the detector 230 includes a light receiver, a sensor for collecting the intensity of ambient light, and parameters changes can be adaptively displayed by collecting the ambient light, and the like.
In some embodiments, the detector 230 may further include an image collector, such as a camera, etc., which may be configured to collect external environment scenes, collect attributes of the user or gestures interacted with the user, adaptively change display parameters, and recognize user gestures, so as to implement a function of interaction with the user.
In some embodiments, the detector 230 may also include a temperature sensor or the like, such as by sensing ambient temperature.
In some embodiments, the display apparatus 200 may adaptively adjust a display color temperature of an image. For example, when the temperature is high, the display device 200 may be adjusted to display a color temperature of the image in a cool tone, or when the temperature is low, the display device 200 may be adjusted to display a warm tone.
In some embodiments, the detector 230 may also include a sound collector or the like, such as a microphone, which may be used to receive the user's voice. Illustratively, a voice signal including a control instruction of the user to control the display device 200, or to collect an ambient sound for recognizing an ambient scene type, so that the display device 200 can adaptively adapt to an ambient noise.
In some embodiments, as shown in fig. 2, the input/output interface 255 is configured to allow data transfer between the controller 250 and external other devices or other controllers 250. Such as receiving video signal data and audio signal data of an external device, or command instruction data, etc.
In some embodiments, the external device interface 240 may include, but is not limited to, the following: the interface can be any one or more of a high-definition multimedia interface (HDMI), an analog or data high-definition component input interface, a composite video input interface, a USB input interface, an RGB port and the like. The plurality of interfaces may form a composite input/output interface.
In some embodiments, as shown in fig. 2, the tuning demodulator 210 is configured to receive a broadcast television signal through a wired or wireless receiving manner, perform modulation and demodulation processing such as amplification, mixing, resonance, and the like, and demodulate an audio and video signal from a plurality of wireless or wired broadcast television signals, where the audio and video signal may include a television audio and video signal carried in a television channel frequency selected by a user and an EPG data signal.
In some embodiments, the frequency points demodulated by the tuner demodulator 210 are controlled by the controller 250, and the controller 250 can send out control signals according to user selection, so that the modem responds to the television signal frequency selected by the user and modulates and demodulates the television signal carried by the frequency.
In some embodiments, the broadcast television signal may be classified into a terrestrial broadcast signal, a cable broadcast signal, a satellite broadcast signal, an internet broadcast signal, or the like according to the broadcasting system of the television signal. Or may be classified into a digital modulation signal, an analog modulation signal, and the like according to a modulation type. Or the signals are classified into digital signals, analog signals and the like according to the types of the signals.
In some embodiments, the controller 250 and the modem 210 may be located in different separate devices, that is, the modem 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. Therefore, the set top box outputs the television audio and video signals modulated and demodulated by the received broadcast television signals to the main body equipment, and the main body equipment receives the audio and video signals through the first input/output interface.
In some embodiments, the controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. The controller 250 may control the overall operation of the display apparatus 200. For example: in response to receiving a user command for selecting a UI object to be displayed on the display 275, the controller 250 may perform an operation related to the object selected by the user command.
In some embodiments, the object may be any one of selectable objects, such as a hyperlink or an icon. Operations related to the selected object, such as: displaying an operation connected to a hyperlink page, document, image, or the like, or performing an operation of a program corresponding to an icon. The user command for selecting the UI object may be a command input through various input means (e.g., a mouse, a keyboard, a touch pad, etc.) connected to the display apparatus 200 or a voice command corresponding to a voice spoken by the user.
As shown in fig. 2, the controller 250 includes at least one of a Random Access Memory 251 (RAM), a Read-Only Memory 252 (ROM), a video processor 270, an audio processor 280, other processors 253 (e.g., a Graphics Processing Unit (GPU), a Central Processing Unit 254 (CPU), a Communication Interface (Communication Interface), and a Communication Bus 256 (Bus), which connects the respective components.
In some embodiments, RAM 251 is used to store temporary data for the operating system or other programs that are running, and in some embodiments, ROM 252 is used to store instructions for various system boots.
In some embodiments, the ROM 252 is used to store a Basic Input Output System (BIOS). The system is used for completing power-on self-test of the system, initialization of each functional module in the system, a driver of basic input/output of the system and booting an operating system.
In some embodiments, when the power-on signal is received, the display device 200 starts to power up, the CPU executes the system boot instruction in the ROM 252, and copies the temporary data of the operating system stored in the memory to the RAM 251 so as to start or run the operating system. After the start of the operating system is completed, the CPU copies the temporary data of the various application programs in the memory to the RAM 251, and then, the various application programs are started or run.
In some embodiments, CPU processor 254 is used to execute operating system and application program instructions stored in memory. And executing various application programs, data and contents according to various interactive instructions received from the outside so as to finally display and play various audio and video contents.
In some example embodiments, the CPU processor 254 may comprise a plurality of processors. The plurality of processors may include a main processor and one or more sub-processors. A main processor for performing some operations of the display apparatus 200 in a pre-power-up mode and/or operations of displaying a screen in a normal mode. One or more sub-processors for one operation in a standby mode or the like.
In some embodiments, the graphics processor 253 is used to generate various graphics objects, such as: icons, operation menus, user input instruction display graphics, and the like. The display device comprises an arithmetic unit which carries out operation by receiving various interactive instructions input by a user and displays various objects according to display attributes. And the rendering device is used for rendering various objects obtained based on the arithmetic unit, and the rendered objects are used for being displayed on a display.
In some embodiments, the video processor 270 is configured to receive an external video signal, and perform video processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, image synthesis, and the like according to a standard codec protocol of the input signal, so as to obtain a signal that can be displayed or played on the direct display device 200.
In some embodiments, video processor 270 includes 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 stream, and if the input MPEG-2 is input, the demultiplexing module demultiplexes the input audio and video data stream into a video signal and an audio signal.
And the video decoding module is used for processing the video signal after demultiplexing, including decoding, scaling and the like.
And the image synthesis module is used for carrying out superposition mixing processing on the GUI signal input by the user or generated by the user and the video image after the zooming processing by the graphic generator so as to generate an image signal for display.
The frame rate conversion module is configured to convert an input video frame rate, such as a 60Hz frame rate into a 120Hz frame rate or a 240Hz frame rate, and the normal format is implemented in, for example, an interpolation frame mode.
The display format module is used for converting the received video output signal after the frame rate conversion, and changing the signal to conform to the signal of the display format, such as outputting an RGB data signal.
In some embodiments, the graphics processor 253 may be integrated with the video processor, or may be separately provided, where the integrated configuration may perform processing of a graphics signal output to the display, and the separate configuration may perform different functions, such as a GPU + FRC (Frame Rate Conversion) architecture.
In some embodiments, the audio processor 280 is configured to receive an external audio signal, decompress and decode the received audio signal according to a standard codec protocol of the input signal, and perform noise reduction, digital-to-analog conversion, and amplification processes to obtain an audio signal that can be played in a speaker.
In some embodiments, video processor 270 may comprise one or more chips. The audio processor may also comprise one or more chips.
In some embodiments, the video processor 270 and the audio processor 280 may be separate chips or may be integrated together with the controller in one or more chips.
In some embodiments, the audio output, under the control of controller 250, receives sound signals output by audio processor 280, such as: the speaker 286, and an external sound output terminal of a generating device that can output to an external device, in addition to the speaker carried by the display device 200 itself, such as: external sound interface or earphone interface, etc., and may also include a near field communication module in the communication interface, for example: and the Bluetooth module is used for outputting sound of the Bluetooth loudspeaker.
The power supply 290 supplies power to the display device 200 from the power input from the external power source under the control of the controller 250. The power supply 290 may include a built-in power supply circuit installed inside the display apparatus 200, or may be a power supply interface installed outside the display apparatus 200 to provide an external power supply in the display apparatus 200.
A user interface 265 for receiving an input signal of a user and then transmitting the received user input signal to the controller 250. The user input signal may be a remote controller signal received through an infrared receiver, and various user control signals may be received through the network communication module.
In some embodiments, the user inputs a user command through the control apparatus 100 or the mobile terminal 300, the user input interface responds to the user input through the controller 250 according to the user input, and the display device 200 responds to the user input through the controller 250.
In some embodiments, a user may enter user commands on a Graphical User Interface (GUI) displayed on the display 275, and the user input interface receives the user input commands through the Graphical User Interface (GUI). Alternatively, the user may input a user command by inputting a specific sound or gesture, and the user input interface receives the user input command by recognizing the sound or gesture through the sensor.
In some embodiments, a "user interface" is a media interface for interaction and information exchange between an application or operating system and a user that enables conversion between an internal form of information and a form that is acceptable to the user. A commonly used presentation form of the User Interface is a Graphical User Interface (GUI), which refers to a User Interface related to computer operations and displayed in a graphical manner. It may be an interface element such as an icon, a window, a control, etc. displayed in the display screen of the electronic device, where the control may include a visual interface element such as an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a Widget, etc.
The memory 260 includes a memory for storing various software modules for driving the display device 200. Such as: various software modules stored in the first memory, including: at least one of a base module, a detection module, a communication module, a display control module, a browser module, and various service modules.
The base module is a bottom layer software module for signal communication between various hardware in the display device 200 and for sending processing and control signals to the upper layer module. The detection module is used for collecting various information from various sensors or user input interfaces, and the management module is used for performing digital-to-analog conversion and analysis management.
For example, the voice recognition module comprises a voice analysis module and a voice instruction database module. The display control module is used for controlling the display to display the image content, and can be used for playing the multimedia image content, UI interface and other information. And the communication module is used for carrying out control and data communication with external equipment. And the browser module is used for executing a module for data communication between the browsing servers. And the service module is used for providing various services and modules including various application programs. Meanwhile, the memory 260 may store a visual effect map for receiving external data and user data, images of various items in various user interfaces, and a focus object, etc.
Fig. 3 exemplarily shows a block diagram of a configuration of the control apparatus 100 according to an exemplary embodiment. As shown in fig. 3, the control device 100 includes a controller 110, a communication interface 130, a user input/output interface, a memory, and a power supply.
The control apparatus 100 is configured to control the display device 200 and may receive an input operation instruction of a user and convert the operation instruction into an instruction recognizable and responsive by the display device 200, serving as an interaction intermediary between the user and the display device 200. Such as: the user operates the channel up/down key on the control device 100, and the display device 200 responds to the channel up/down operation.
In some embodiments, the control device 100 may be a smart device. Such as: the control apparatus 100 may install various applications that control the display device 200 according to user demands.
In some embodiments, as shown in fig. 1, a mobile terminal 300 or other intelligent electronic device may function similar to the control apparatus 100 after installing an application for manipulating the display device 200. Such as: the user may implement the function of controlling the physical keys of the apparatus 100 by installing an application, various function keys or virtual buttons of a graphical user interface available on the mobile terminal 300 or other intelligent electronic device.
The controller 110 includes a processor 112 and RAM 113 and ROM 114, a communication interface 130, and a communication bus. The controller is used for controlling the operation of the control device 100, as well as the communication cooperation among the internal components and the external and internal data processing functions.
The communication interface 130 enables communication of control signals and data signals with the display apparatus 200 under the control of the controller 110. Such as: the received user input signal is transmitted to the display apparatus 200. The communication interface 130 may include at least one of a WiFi chip 131, a bluetooth module 132, an NFC module 133, and other near field communication modules.
A user input/output interface 140, wherein the input interface includes at least one of a microphone 141, a touch pad 142, a sensor 143, a key 144, and other input interfaces. Such as: the user can realize a user instruction input function through actions such as voice, touch, gesture, pressing, and the like, and the input interface converts the received analog signal into a digital signal and converts the digital signal into a corresponding instruction signal, and sends the instruction signal to the display device 200.
The output interface includes an interface that transmits the received user instruction to the display apparatus 200. In some embodiments, the interface may be an infrared interface or a radio frequency interface. Such as: when the infrared signal interface is used, the user input instruction needs to be converted into an infrared control signal according to an infrared control protocol, and the infrared control signal is sent to the display device 200 through the infrared sending module. The following steps are repeated: when the rf signal interface is used, a user input command needs to be converted into a digital signal, and then the digital signal is modulated according to the rf control signal modulation protocol and then transmitted to the display device 200 through the rf transmitting terminal.
In some embodiments, the control device 100 includes at least one of a communication interface 130 and an input-output interface 140. The control device 100 is configured with a communication interface 130, such as: the WiFi, bluetooth, NFC, etc. modules may transmit the user input command to the display device 200 through the WiFi protocol, or the bluetooth protocol, or the NFC protocol code.
And a memory 190 for storing various operation programs, data and applications for driving and controlling the control device 200 under the control of the controller. The memory 190 may store various control signal commands input by a user.
And a power supply 180 for providing operation power support for each element of the control device 100 under the control of the controller. A battery and associated control circuitry.
In some embodiments, the system may include a Kernel (Kernel), a command parser (shell), a file system, and an application. The kernel, shell, and file system together make up the basic operating system structure that allows users to manage files, run programs, and use the system. After power-on, the kernel is started, kernel space is activated, hardware is abstracted, hardware parameters are initialized, and virtual memory, a scheduler, signals and interprocess communication (IPC) are operated and maintained. And after the kernel is started, loading the Shell and the user application program. The application program is compiled into machine code after being started, and a process is formed.
Referring to fig. 4, in some embodiments, the system is divided into four layers, which are an Application (Applications) layer (abbreviated as "Application layer"), an Application Framework (Application Framework) layer (abbreviated as "Framework layer"), an Android runtime (Android runtime) and system library layer (abbreviated as "system runtime library layer"), and a kernel layer from top to bottom.
In some embodiments, at least one application program runs in the application layer, and the application programs may be windows (windows) programs carried by an operating system, system setting programs, clock programs, camera applications and the like. Or may be an application developed by a third party developer such as a hi program, a karaoke program, a magic mirror program, or the like. In specific implementation, the application packages in the application layer are not limited to the above examples, and may actually include other application packages, which is not limited in this embodiment of the present application.
The framework layer provides an Application Programming Interface (API) and a programming framework for the application program of the application layer. The application framework layer includes a number of predefined functions. The application framework layer acts as a processing center that decides to let the applications in the application layer act. The application program can access the resource in the system and obtain the service of the system in execution through the API interface
As shown in fig. 4, in the embodiment of the present application, the application framework layer includes a manager (Managers), a Content Provider (Content Provider), and the like, where the manager includes at least one of the following modules: an Activity Manager (Activity Manager) is used to interact with all activities running in the system. A Location Manager (Location Manager) is used to provide access to system Location services or applications. A Package Manager (Package Manager) is used to retrieve various information related to the application packages currently installed on the device. A Notification Manager (Notification Manager) is used to control the display and clearing of Notification messages. A Window Manager (Window Manager) is used to manage the icons, windows, toolbars, wallpapers, and desktop components on a user interface.
In some embodiments, the activity manager is to: managing the life cycle of each application program and the usual navigation backspacing functions, such as controlling the exit of the application program (including switching the user interface currently displayed in the display window to the system desktop), opening, backing (including switching the user interface currently displayed in the display window to the previous user interface of the user interface currently displayed), and the like.
In some embodiments, the window manager is configured to manage all window programs, such as obtaining a size of the display screen, determining whether a status bar exists, locking the screen, clipping the screen, controlling a change of the display window (e.g., zooming the display window out, dithering the display, distorting the display, etc.), and the like.
In some embodiments, the system runtime layer provides support for the upper layer, i.e., the framework layer, and when the framework layer is used, the android operating system runs the C/C + + library included in the system runtime layer to implement the functions to be implemented by the framework layer.
In some embodiments, the kernel layer is a layer between hardware and software. As shown in fig. 4, the core layer includes at least one of the following drivers: audio drive, display drive, bluetooth drive, camera drive, WIFI drive, USB drive, HDMI drive, sensor drive (such as fingerprint sensor, temperature sensor, touch sensor, pressure sensor, etc.), and so on.
In some embodiments, the kernel layer further comprises a power driver module for power management.
In some embodiments, software programs and/or modules corresponding to the software architecture of fig. 4 are stored in the first memory or the second memory as shown in fig. 2 or fig. 3.
In some embodiments, taking the magic mirror application (photographing application) as an example, when the remote control receiving device receives a remote control input operation, a corresponding hardware interrupt is sent to the kernel layer. The kernel layer processes the input operation into an original input event (including information such as a value of the input operation, a timestamp of the input operation, etc.). The raw input events are stored at the kernel layer. The application program framework layer obtains an original input event from the kernel layer, identifies a control corresponding to the input event according to the current position of the focus and uses the input operation as a confirmation operation, the control corresponding to the confirmation operation is a control of a magic mirror application icon, the magic mirror application calls an interface of the application framework layer to start the magic mirror application, and then the kernel layer is called to start a camera driver, so that a static image or a video is captured through the camera.
In some embodiments, for a display device with a touch function, taking a split screen operation as an example, the display device receives an input operation (such as a split screen operation) that a user acts on a display screen, and the kernel layer may generate a corresponding input event according to the input operation and report the event to the application framework layer. The window mode (such as multi-window mode) corresponding to the input operation, the position and size of the window and the like are set by an activity manager of the application framework layer. And the window management of the application program framework layer draws a window according to the setting of the activity manager, then sends the drawn window data to the display driver of the kernel layer, and the display driver displays the corresponding application interface in different display areas of the display screen.
In some embodiments, as shown in fig. 5, the application layer containing at least one application may display a corresponding icon control in the display, such as: the system comprises a live television application icon control, a video on demand application icon control, a media center application icon control, an application center icon control, a game application icon control and the like.
In some embodiments, the live television application may provide live television via different signal sources. For example, a live television application may provide television signals using input from cable television, radio broadcasts, satellite services, or other types of live television services. And, the live television application may display video of the live television signal on display device 200.
In some embodiments, a video-on-demand application may provide video from different storage sources. Unlike live television applications, video on demand provides a video display from some storage source. For example, the video on demand may come from a server side of the cloud storage, from a local hard disk storage containing stored video programs.
In some embodiments, the media center application may provide various applications for multimedia content playback. For example, a media center, which may be other than live television or video on demand, may provide services that a user may access to various images or audio through a media center application.
In some embodiments, an application center may provide storage for various applications. The application may be a game, an application, or some other application associated with a computer system or other device that may be run on the smart television. The application center may obtain these applications from different sources, store them in local storage, and then be operable on the display device 200.
In recent years, with the increasing dynamic dimming display technology of display devices such as liquid crystal televisions, in terms of image partition contrast control, high-end display devices divide a backlight into smaller regions, and at the same time, achieve effective improvement in local contrast, image quality details, and the like of real-time pictures.
The dynamic dimming control technique includes adaptively adjusting a backlight intensity according to a picture content and performing image compensation on the picture content. The dynamic dimming control technology achieves the purposes of reducing electric quantity and saving energy by adjusting the brightness of the backlight lamp tube. However, when the backlight in the sub-area is reduced, the brightness of the part of the picture is subjectively perceived to be reduced, and meanwhile, for part of the luminescent materials, when the dynamic dimming is performed, the spectrum of the luminescent materials affected by the backlight changes, so that the color temperature shifts. Thus, the dynamic dimming control technology requires compensation of image brightness and color temperature for the display device. The current image compensation method usually only involves compensation of image brightness, and does not compensate for color temperature shift, which may cause distortion of the display screen of the display device.
Based on this, on the basis of the above embodiments, in order to solve the above technical problem, the inventors found through research that the color temperature of the display pixels is different under different backlight luminances. When dynamic dimming is not performed, the backlight brightness is the maximum value, and at this time, the color temperature of the display pixel is stable and belongs to the normal color temperature. As the dynamic dimming proceeds, the backlight brightness changes, and the color temperature shifts. The inventors have found out from this study that it is conceivable that the color temperature after the backlight luminance is changed can be adjusted to a color temperature before or close to before the backlight luminance is not changed. When the brightness before the backlight brightness is not changed is a preset value, the color temperature after the backlight brightness is changed can be adjusted to the color temperature when the backlight brightness is the preset value. Therefore, the inventor has carefully studied and determined a color temperature compensation manner, i.e., a mapping relationship between the backlight brightness and the color temperature compensation value, corresponding to the pixels of the display device under different backlight brightness, so that the color temperature of the pixels of the display device under the corresponding backlight brightness can be compensated to the corresponding color temperature when the backlight brightness is a preset value according to the mapping relationship. Therefore, the embodiment of the present application provides a display device, where the display device obtains backlight brightness of a display through a controller connected to the display, and determines a color temperature compensation value having a mapping relation with the backlight brightness according to the backlight brightness and a mapping relation between the backlight brightness and the color temperature compensation value, so as to perform color temperature compensation on pixels of the display according to the color temperature compensation value, so that a color temperature compensated by the pixels of the display is the same as a color temperature of the pixels of the display when the backlight brightness is a preset value. And further overcome the problem that the display picture of the display device is distorted due to the color temperature shift generated by the current dynamic dimming technology.
The display device provided by the embodiment of the application comprises:
a display.
A controller coupled to the display and configured to:
the backlight brightness of the display is obtained.
And determining a color temperature compensation value having a mapping relation with the backlight brightness according to the backlight brightness and the mapping relation between the backlight brightness and the color temperature compensation value.
And performing color temperature compensation on the pixels of the display according to the color temperature compensation value so that the color temperature of the pixels of the display after compensation is the same as the color temperature of the pixels of the display when the backlight brightness is a preset value.
In some embodiments, the display includes a plurality of segments, each segment having a number of pixels, each segment corresponding to a backlight. The controller may calculate the backlight brightness by obtaining a histogram of the input image or an average brightness and a maximum brightness of the image, so as to perform corresponding image compensation including color temperature compensation and brightness compensation according to the backlight brightness. The brightness compensation can be performed by calculating the brightness compensation value of each pixel point in each partition in the manner of the conventional general brightness compensation algorithm according to the backlight brightness and the light diffusion model corresponding to each partition.
In some embodiments, the preset value may be set as required, for example, may be set as a maximum backlight brightness value, a value close to the maximum backlight brightness value, or other values, so as to achieve different compensation effects for the compensated color temperature. When the preset value is the maximum value of the backlight brightness, the color temperature compensation effect is best. The mapping relationship between the backlight brightness and the color temperature compensation value can be stored in the storage space of the controller by establishing a mapping table between the backlight brightness and the color temperature compensation value. When the corresponding color temperature compensation value is required to be determined according to the backlight brightness, the color temperature compensation value corresponding to the backlight brightness can be determined from the mapping table.
Illustratively, as shown in fig. 6-9, the actual change in color temperature and color coordinates when the backlight brightness changes in a certain section of the display is used for illustration. The x-axis in fig. 6-9 is the 100% gray window signal, the y-axis in fig. 6 and 8 is the color temperature, and the y-axis in fig. 7 and 9 refers to the xy color coordinate. When the dynamic dimming is started, the backlight brightness is constantly changed in different areas for different scenes, the spectrum is influenced, and the color temperatures in different areas are shifted to different degrees. As shown in fig. 6, when the window size of the 100% gray scale changes, the backlight in the partition will change accordingly, and further the color temperature changes. The window size of 100% gray scale is from 1-15, and is increased in turn. When the window size of the 100% gray is small, the backlight luminance is also small. For example, when the window of 100% gray corresponds to the first window, the window size is small, and the color temperature is about 9000. Meanwhile, as shown in fig. 7, the xy color coordinates also vary. The color temperature can be calculated by xy color coordinates. The xy color coordinates are another representation of the color temperature. When the color temperature compensation is performed on the pixels of the partition, as shown in fig. 8 and 9, the color temperature and the xy color coordinates both tend to be constant, and the color temperature after compensation is the same as the color temperature of the pixels of the partition when the backlight brightness is a preset value. The preset value can be set as the maximum value of the backlight brightness, so that the color temperature of the partition pixel point is reduced to the state before the dynamic dimming is not started, and the problem of color temperature deviation of the pixel point is solved.
In some embodiments, the display includes a plurality of partitions.
A controller specifically configured to:
the backlight brightness of each partition of the display is obtained.
And determining a color temperature compensation value having a mapping relation with the backlight brightness of each subarea according to the backlight brightness of each subarea and the mapping relation between the backlight brightness and the color temperature compensation value.
And performing color temperature compensation on the pixels of each subarea of the display according to the color temperature compensation value which has a mapping relation with the backlight brightness of each subarea.
In this embodiment, as shown in fig. 10, the display may be divided into a plurality of partitions, and each partition has a plurality of pixels. As shown in FIG. 10, the display has a plurality of partitions, a1-an, b1-bn, c1-cn through n 1-nn. Each partition is provided with a corresponding backlight source, so that the backlight brightness in each partition is adjusted.
Meanwhile, when color temperature compensation is performed on the pixels of each partition of the display, each pixel in the partition can be compensated according to the color temperature compensation value corresponding to each partition. Namely, the color temperature compensation values of all the pixel points in the subareas are the same. Meanwhile, the mapping relation between the backlight brightness and the color temperature compensation value of each pixel in the subarea can be constructed, so that the color temperature compensation of each pixel in the subarea is more accurate.
In some embodiments, the color temperature compensation value is an RGB adjustment parameter value.
A controller specifically configured to:
and adjusting the current RGB value of the pixel of each subarea of the display according to the RGB adjustment parameter value which has a mapping relation with the backlight brightness of each subarea so as to compensate the color temperature of the pixel of the display.
In this embodiment, when performing color temperature compensation on the pixel points of each partition of the display, the RGB parameters of each pixel point may be adjusted. RGB represents the three color channels of red, green and blue, respectively. Different colors can be adjusted by adjusting the three color channels, so that the color temperature can be adjusted by adjusting RGB.
In some embodiments, the RGB adjustment parameter values have a mapping relationship with the backlight brightness of each pixel in each partition. The RGB adjustment parameter values are gain values and offset values corresponding to three color components in RGB in an RGB space. The current RGB value includes three color component values of the current RGB.
A controller specifically configured to:
and multiplying the gain value corresponding to each color component in the RGB space corresponding to each pixel in each partition by each color component value of the current RGB of the pixel to obtain the color component intermediate value of the RBG of each pixel in each partition.
And adding the intermediate value of the color component of the RBG of each pixel of each partition with the offset value corresponding to each color component in the RGB space corresponding to the pixel to obtain the component value of each color of the current RGB of each pixel of each partition after adjustment.
In some embodiments, the controller is further configured to:
and acquiring RGB adjustment parameter values corresponding to each pixel point of the display under each backlight brightness.
And generating a mapping relation according to each backlight brightness and the corresponding RGB adjustment parameter value.
The following description is given with reference to table 1 to illustrate the color temperature compensation of the pixel point according to the gain value and the offset value corresponding to the three color components in RGB in the RGB space. The preset value in this embodiment is the maximum value of the backlight brightness. In table 1, BL denotes the backlight luminance, rgain, ggain, bgain denote the corresponding gain values, and Roffset, goffset, boffset denote the corresponding offset values. The set-up procedure for table 1 is as follows:
step S501, detecting the corresponding color temperature of each partition pixel point of the display when the backlight brightness is maximum by a color temperature detecting instrument by a worker.
Step S502, aiming at each pixel point of each partition, the backlight brightness is adjusted to the minimum value, and then the gain value and the offset value corresponding to the RGB three color components of the pixel point are adjusted, so that the color temperature of the pixel point after adjustment is the same as the color temperature of the pixel point when the backlight brightness is maximum. And recording the gain value and the offset value corresponding to the three color components of the pixel point.
In step S503, the backlight brightness is adjusted from the minimum value to the next value, for example, when the backlight brightness corresponding to the minimum value of the backlight brightness is 1, and the next value is 2. And repeating the step of S502 until the backlight brightness reaches the maximum value, and at the moment, recording the gain value and the deviation value corresponding to the three color components of each pixel point.
Step S504, generating a mapping table of gain values and offset values corresponding to the corresponding backlight brightness and the three color components by using the gain values and offset values corresponding to the three color components of each pixel point recorded in step S503 under different backlight brightness. As shown in table 1.
When color temperature compensation is needed to be carried out on the pixel point, the gain value corresponding to each color component in RGB in the RGB space corresponding to each partition is multiplied by each color component value of the current RGB of each pixel in each partition, and the color component intermediate value of the RBG of each pixel in each partition is obtained.
And adding the intermediate value of the color component of the RBG of each pixel of each partition with the offset value corresponding to each color component in the RGB space corresponding to each partition to obtain the component value of each color of the current RGB of each pixel of each partition after adjustment.
That is, the adjusted RGB component values are as follows:
Rout＝Rin*Rgain+Roffset，Gout＝Gin*Ggain+Goffset，Bout＝Bin*Bgain+Boffset
where Rout is the adjusted R component value, gout is the adjusted G component value, and Bout is the adjusted B component value. Rin is the current R component value, gin is the current G component value, and Bin is the current B component value.
TABLE 1 mapping table of gain values and offset values corresponding to backlight luminance and three color components
Figure BDA0003137307970000191
In some embodiments, the RGB adjustment parameter values have a mapping relationship with the backlight brightness of each pixel in each partition. The RGB adjustment parameter values are RGB color component values in XYZ space.
A controller specifically configured to:
and obtaining the adjustment values of the R and B components of the RGB of the pixels of each partition in the XYZ space according to the RGB color component value in the XYZ space corresponding to each pixel in each partition and the preset white field color coordinate.
And adjusting R and B component values in RGB of each pixel point in the corresponding partition according to the adjustment values of R and B components of RGB of the pixels of each partition in an XYZ space.
In this embodiment, the XYZ space is a color space, and can be converted to and from the RGB color space. The white field color coordinates refer to corresponding color coordinates when the display displays a white screen, and the white field color coordinates are different under different backlight brightness. The preset white field color coordinates may correspond to when the backlight brightness of each pixel of the display is a preset value. Thereby improving the color temperature compensation effect for each pixel of the display.
The RGB color component values in the XYZ space refer to the component values of RGB on XYZ, i.e. RX, RY, RZ, GX, GY, GZ, BX, BY, BZ. The adjusted values of the R and B components are RX, RY, RZ, BX, BY, BZ. In RGB, the G component value has a large influence on luminance and a relatively small influence on chroma, so in this embodiment, only the R and B components are adjusted.
In some embodiments, the preset white field color coordinate is a corresponding white field color coordinate when the backlight brightness is a preset value.
A controller specifically configured to:
and obtaining the adjustment values of the x-axis components of the RGB components of the pixels of each partition in the XYZ space respectively according to the RGB color component values of each pixel in the XYZ space and the color coordinate x component value in the corresponding white field color coordinate when the backlight brightness is a preset value.
And obtaining the adjustment values of the y-axis components of the RGB components of the pixels of each partition in the XYZ space respectively according to the RGB color component values of each pixel in the XYZ space and the color coordinate y component value in the corresponding white field color coordinate when the backlight brightness is a preset value.
In this embodiment, since the white field color coordinate is divided into two coordinates of x and y, the white field color coordinate x has a large correlation with the color component values of RGB in the XYZ space in the x-axis component, that is, RX, GX, BX. In contrast, the white field color coordinate y is greatly related to the color component values of RGB in the XYZ space in the y-axis component, namely RY, GY, BY.
In some embodiments, the controller is specifically configured to:
inputting the RGB color component value of each pixel in each partition in the XYZ space and the color coordinate x component value in the corresponding white field color coordinate into a preset color coordinate x algorithm when the backlight brightness is a preset value, so as to output the adjustment value of the x-axis component of the R and B components of the RGB in the XYZ space of the pixels in each partition in the XYZ space respectively.
Inputting the RGB color component value of each pixel in each partition in the XYZ space and the color coordinate y component value in the corresponding white field color coordinate into a preset color coordinate y algorithm when the backlight brightness is a preset value, so as to output the adjustment value of the y-axis component of the RGB components and the B components of the pixels in each partition in the XYZ space respectively in the XYZ space.
Wherein, the color coordinate x algorithm is as follows:
Wx255＝(RX+GX+BX)/(RX+RY+RZ+GX+GY+GZ+BX+BY+BZ)。
the color coordinate y algorithm is:
Wy255＝(RY+GY+BY)/(RX+RY+RZ+GX+GY+GZ+BX+BY+BZ)。
where Wx255 is the color coordinate x of the predetermined white field, wy255 is the color coordinate y of the predetermined white field, RX, RY, and RZ are the XYZ component values of R in the XYZ space, GX + GY + GZ are the XYZ component values of G in the XYZ space, BX + BY + BZ are the XYZ component values of B in the XYZ space.
In some embodiments, the controller is further configured to:
and acquiring the corresponding brightness of each pixel point of the display under each backlight brightness and the corresponding color coordinate of the pixel point under the RGB space. The color coordinates in the RGB space are color coordinates of the RGB space in a white field environment corresponding to the backlight luminance.
The luminance and color coordinates in RGB space are converted into RGB color component values in XYZ space.
And generating a mapping relation according to each backlight brightness and the corresponding RGB color component value in the XYZ space.
Color temperature compensation of pixel points according to RGB color component values in an XYZ space and preset white field color coordinates is exemplified below with reference to tables 2 and 3. The preset value in this embodiment is the maximum value of the backlight brightness. The preset white field color coordinate is a corresponding white field color coordinate when the backlight brightness is a preset value, namely the corresponding white field color coordinate when the preset white field color coordinate is the maximum backlight brightness value. In table 2, wx is a white field color coordinate x, wy is a white field color coordinate y, lv is luminance, and Rx, ry, gx, gy, bx, by are RGB color coordinates x and y, respectively. R255, G255, and B255 are luminances of RGB, respectively, and W0 to W255 are luminances corresponding to white field color coordinates. In table 3, RX, RY, RZ, GX, GY, GZ, BX, BY, BZ are RGB color component values in XYZ space. The set-up procedures of tables 2 and 3 are as follows:
step S601, a worker detects, through a detection instrument, a white field color coordinate, a brightness, an RGB value in a white field environment, and an RGB color coordinate of 255 grays when a backlight is maximum, which correspond to each partition pixel point of the display at different backlight brightness.
Step S602, a table 2 is constructed according to the white field color coordinates and the brightness corresponding to different backlight brightness and the RGB color coordinates of 255 gray scale at the maximum backlight brightness.
Step S603, performing a certain calculation on each parameter in table 2 in combination with the RGB value corresponding to each partition pixel point in the white field environment at different backlight luminances to obtain RGB color component values corresponding to different backlight luminances in the XYZ space.
Step S604, construct table 3 according to RGB color component values corresponding to different backlight luminances in XYZ space.
Table 2 backlight brightness relation table under white field environment
BL Wx Wy Lv
0 BL0 Wx0 Wy0 W0
1 BL1 Wx1 Wy1 W1
2 BL2 Wx2 Wy2 W2
3 BL3 Wx3 Wy3 W3
4 BL4 Wx4 Wy4 W4
5 BL5 Wx5 Wy5 W5
…… …… …… …… ……
255 BL255 Wx255 Wy255 W255
255 BL255 Rx255 Ry255 R255
255 BL255 Gx255 Gy255 G255
255 BL255 Bx255 By255 B255
Table 3 mapping table of backlight brightness and RGB color component values in XYZ space
BL RX RY RZ GX GY GZ BX BY BZ
BL0 RX0 RY0 RZ0 GX0 GY0 GZ0 BX0 BY0 BZ0
BL1 RX1 RY1 RZ1 GX1 GY1 GZ1 BX1 BY1 BZ1
BL2 RX2 RY2 RZ2 GX2 GY2 GZ2 BX2 BY2 BZ2
…… …… …… …… …… …… …… …… …… ……
BL255 RX255 RY255 RZ255 GX255 GY255 GZ255 BX255 BY255 BZ255
The color temperature compensation only considers the chroma, the brightness keeps the original value of the pixel unchanged, G has a large influence on the brightness and a small influence on the chroma, and therefore, the adjustment of R and B is mainly performed. G is not adjusted and can be directly obtained from table 3. And calculating the adjustment values of R and B components of RGB in an XYZ space according to the following corresponding relation formula of the color coordinates x and y and the RGB:
Wx255＝(RX+GX+BX)/(RX+RY+RZ+GX+GY+GZ+BX+BY+BZ)，
Wy255＝(RY+GY+BY)/(RX+RY+RZ+GX+GY+GZ+BX+BY+BZ)。
in determining the adjustment values of the R and B components, G is a fixed value by default, and thus, the adjustment values of the R and B components can be determined only by adjusting the component values of R and B.
As shown in fig. 11, an embodiment of the present application further provides a display method, including:
in step S701, the backlight brightness of the display is obtained.
Step S702, according to the backlight brightness and the mapping relationship between the backlight brightness and the color temperature compensation value, determining the color temperature compensation value having the mapping relationship with the backlight brightness.
And step S703, performing color temperature compensation on the pixels of the display according to the color temperature compensation value, so that the color temperature of the pixels of the display after compensation is the same as the color temperature of the pixels of the display when the backlight brightness is a preset value.
In the display method provided by the embodiment, the color temperature compensation value having a mapping relation with the backlight brightness is determined by obtaining the backlight brightness of the display according to the backlight brightness and the mapping relation between the backlight brightness and the color temperature compensation value, so that the color temperature compensation is performed on the pixels of the display according to the color temperature compensation value, so that the color temperature compensated by the pixels of the display is the same as the color temperature of the pixels of the display when the backlight brightness is a preset value. And further overcome the problem that the display picture of the display device is distorted due to the color temperature shift generated by the dynamic dimming technology at present.
In some embodiments, the display includes a plurality of partitions. The color temperature compensation value is an RGB adjustment parameter value.
According to the color temperature compensation value having a mapping relation with the backlight brightness of each partition, the method comprises the following steps:
and adjusting the current RGB value of the pixel of each subarea of the display according to the RGB adjustment parameter value which has a mapping relation with the backlight brightness of each subarea so as to compensate the color temperature of the pixel of the display.
In some embodiments, the RGB adjustment parameter values have a mapping relationship with the backlight brightness of each pixel in each partition. The RGB adjustment parameter values are gain values and offset values corresponding to three color components in RGB in an RGB space. The current RGB value includes three color component values of the current RGB.
Adjusting the current RGB values of the pixels of each partition of the display according to the RGB adjustment parameter values having a mapping relation with the backlight brightness of each partition, comprising:
and multiplying the gain value corresponding to each color component in the RGB space corresponding to each pixel in each partition by each color component value of the current RGB of the pixel to obtain the color component intermediate value of the RBG of each pixel in each partition.
And adding the intermediate value of the color component of the RBG of each pixel of each partition with the offset value corresponding to each color component in the RGB space corresponding to the pixel to obtain the component value of each color of the current RGB of each pixel of each partition after adjustment.
In some embodiments, before determining the color temperature compensation value having a mapping relation with the backlight brightness according to the backlight brightness and the mapping relation between the backlight brightness and the color temperature compensation value, the method further includes:
and acquiring RGB adjustment parameter values corresponding to each pixel point of the display under each backlight brightness.
And generating a mapping relation according to each backlight brightness and the corresponding RGB adjustment parameter value.
In some embodiments, the RGB adjustment parameter values have a mapping relationship with the backlight brightness of each pixel in each partition. The RGB adjustment parameter values are RGB color component values in XYZ space.
According to the color temperature compensation value having a mapping relation with the backlight brightness of each subarea, the color temperature compensation method comprises the following steps:
and obtaining the adjustment values of the R and B components of the RGB of the pixels of each partition in the XYZ space according to the RGB color component value in the XYZ space corresponding to each pixel in each partition and the preset white field color coordinate.
And adjusting R and B component values in RGB of each pixel point in the corresponding partition according to the adjustment values of R and B components of RGB of the pixels of each partition in an XYZ space.
In some embodiments, the preset white field color coordinate is a corresponding white field color coordinate when the backlight brightness is a preset value.
Obtaining the adjustment values of the R and B components of RGB in the XYZ space of the pixels of each partition according to the RGB color component value in the XYZ space corresponding to each pixel in each partition and the preset white field color coordinate, including:
inputting the RGB color component value of each pixel in each partition in the XYZ space and the color coordinate x component value in the corresponding white field color coordinate into a preset color coordinate x algorithm when the backlight brightness is a preset value, so as to output the adjustment value of the x-axis component of the R and B components of the RGB in the XYZ space of the pixels in each partition in the XYZ space respectively.
Inputting the RGB color component value of each pixel in each partition in the XYZ space and the color coordinate y component value in the corresponding white field color coordinate into a preset color coordinate y algorithm when the backlight brightness is a preset value, so as to output the adjustment value of the y-axis component of the RGB components and the B components of the pixels in each partition in the XYZ space respectively in the XYZ space.
In some embodiments, the color coordinate x algorithm is:
Wx255＝(RX+GX+BX)/(RX+RY+RZ+GX+GY+GZ+BX+BY+BZ)。
the color coordinate y algorithm is:
Wy255＝(RY+GY+BY)/(RX+RY+RZ+GX+GY+GZ+BX+BY+BZ)。
wherein Wx255 is a color coordinate x of the preset white field, wy255 is a color coordinate y of the preset white field, RX, RY, and RZ are XYZ component values of R in an XYZ space, GX + GY + GZ are XYZ component values of G in an XYZ space, and BX + BY + BZ are XYZ component values of B in an XYZ space.
In some embodiments, before determining the color temperature compensation value having a mapping relation with the backlight brightness according to the backlight brightness and the mapping relation between the backlight brightness and the color temperature compensation value, the method further includes:
and acquiring the corresponding brightness of each pixel point of the display under each backlight brightness and the corresponding color coordinate of the pixel point under the RGB space. The color coordinates in the RGB space are color coordinates in the RGB space in a white field environment corresponding to the backlight luminance.
The luminance and color coordinates in RGB space are converted into RGB color component values in XYZ space.
And generating a mapping relation according to each backlight brightness and the corresponding RGB color component value in the XYZ space.
The display method implemented by the display device provided in the above embodiment corresponds to the functions implemented by the display device provided in the embodiments shown in fig. 6 to fig. 10, and details are not repeated here.
An embodiment of the present application further provides a computer-readable storage medium, where a computer-executable instruction is stored in the computer-readable storage medium, and when a processor executes the computer-executable instruction, the display method executed by the display device in the foregoing embodiment is implemented.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.
The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims (10)

1. A display device, comprising:
a display;
a controller connected with the display and configured to:
acquiring backlight brightness of the display;
determining a color temperature compensation value having a mapping relation with the backlight brightness according to the backlight brightness and the mapping relation between the backlight brightness and the color temperature compensation value;
and performing color temperature compensation on the pixels of the display according to the color temperature compensation value, so that the color temperature of the pixels of the display after compensation is the same as the color temperature of the pixels of the display when the backlight brightness is a preset value.
2. The display device of claim 1, wherein the display comprises a plurality of partitions;
the controller is specifically configured to:
acquiring the backlight brightness of each subarea of the display;
determining a color temperature compensation value having a mapping relation with the backlight brightness of each subarea according to the backlight brightness of each subarea and the mapping relation between the backlight brightness and the color temperature compensation value;
and performing color temperature compensation on the pixels of the partitions of the display according to the color temperature compensation value which has a mapping relation with the backlight brightness of the partitions.
3. The display device according to claim 2, wherein the color temperature compensation value is an RGB adjustment parameter value;
the controller is specifically configured to:
and adjusting the current RGB value of the pixel of each subarea of the display according to the RGB adjustment parameter value which has a mapping relation with the backlight brightness of each subarea so as to compensate the color temperature of the pixel of the display.
4. The display device according to claim 3, wherein the RGB adjustment parameter value has a mapping relation with backlight brightness of each pixel in each partition; the RGB adjustment parameter values are gain values and offset values corresponding to three color components in RGB in an RGB space; the current RGB values comprise three color component values of a current RGB;
the controller is specifically configured to:
multiplying the gain value corresponding to each color component in RGB in the RGB space corresponding to each pixel in each partition by each color component value of the current RGB of the pixel to obtain a color component intermediate value of the RBG of each pixel in each partition;
and adding the intermediate value of the color component of the RBG of each pixel of each partition to the offset value corresponding to each color component in the RGB space corresponding to the pixel to obtain the component value of each color of the current RGB of each pixel of each partition after adjustment.
5. The display device of claim 4, wherein the controller is further configured to:
acquiring RGB adjustment parameter values corresponding to pixel points of a display under backlight brightness;
and generating the mapping relation according to each backlight brightness and the corresponding RGB adjustment parameter value.
6. The display device according to claim 3, wherein the RGB adjustment parameter value has a mapping relation with backlight brightness of each pixel in each partition; the RGB adjustment parameter values are RGB color component values in an XYZ space;
the controller is specifically configured to:
obtaining the adjustment values of the R and B components of RGB of the pixels of the partitions in the XYZ space according to the RGB color component value of each pixel in the partitions in the XYZ space and a preset white field color coordinate;
and adjusting R and B component values in RGB of each pixel point in the corresponding partition according to the adjustment values of the R and B components of RGB of the pixel of each partition in the XYZ space.
7. The display device according to claim 6, wherein the preset white field color coordinates are corresponding white field color coordinates when the backlight brightness is the preset value;
the controller is specifically configured to:
obtaining adjustment values of x-axis components of R and B components of RGB of the pixels of the partitions in an XYZ space respectively in the XYZ space according to RGB color component values of the pixels in the partitions in the XYZ space and color coordinate x component values in white field color coordinates corresponding to the preset values of the backlight brightness;
and obtaining the adjustment values of the y-axis components of the RGB components of the pixels of the partitions in the XYZ space respectively in the XYZ space according to the RGB color component values of the pixels in the XYZ space and the color coordinate y component value in the corresponding white field color coordinate when the backlight brightness is the preset value.
8. The display device according to claim 6, wherein the controller is specifically configured to:
inputting the RGB color component value of each pixel in each partition in the XYZ space and the color coordinate x component value in the corresponding white field color coordinate when the backlight brightness is the preset value into a preset color coordinate x algorithm to output the adjustment values of the x-axis components of the R and B components of RGB in the XYZ space of each pixel in each partition respectively;
inputting the RGB color component value of each pixel in each partition in the XYZ space and the color coordinate y component value in the corresponding white field color coordinate when the backlight brightness is the preset value into a preset color coordinate y algorithm to output the adjustment values of the y-axis components of the R and B components of RGB in the XYZ space of each pixel in each partition respectively;
wherein, the color coordinate x algorithm is as follows:
Wx255＝(RX+GX+BX)/(RX+RY+RZ+GX+GY+GZ+BX+BY+BZ)；
the color coordinate y algorithm is as follows:
Wy255＝(RY+GY+BY)/(RX+RY+RZ+GX+GY+GZ+BX+BY+BZ)；
wherein Wx255 is a color coordinate x of the preset white field, wy255 is a color coordinate y of the preset white field, RX, RY, and RZ are XYZ component values of R in an XYZ space, GX + GY + GZ are XYZ component values of G in an XYZ space, and BX + BY + BZ are XYZ component values of B in an XYZ space.
9. The display device according to any one of claims 6 to 8, wherein the controller is further configured to:
acquiring corresponding brightness of each pixel point of the display under each backlight brightness and a corresponding color coordinate under an RGB space; the color coordinate in the RGB space is the color coordinate in the RGB space in the white field environment corresponding to the backlight brightness;
converting the brightness and the color coordinates in the RGB space into RGB color component values in an XYZ space;
and generating the mapping relation according to each backlight brightness and the corresponding RGB color component value in the XYZ space.
10. A display method, comprising:
acquiring backlight brightness of a display;
determining a color temperature compensation value having a mapping relation with the backlight brightness according to the backlight brightness and the mapping relation between the backlight brightness and the color temperature compensation value;
and performing color temperature compensation on the pixels of the display according to the color temperature compensation value, so that the color temperature of the pixels of the display after compensation is the same as the color temperature of the pixels of the display when the backlight brightness is a preset value.
CN202110724484.4A 2021-06-29 2021-06-29 Display apparatus and display method Pending CN115547265A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117079618A (en) * 2023-10-18 2023-11-17 深圳可视科技有限公司 LED liquid crystal display screen brightness correction method and system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117079618A (en) * 2023-10-18 2023-11-17 深圳可视科技有限公司 LED liquid crystal display screen brightness correction method and system
CN117079618B (en) * 2023-10-18 2024-01-05 深圳可视科技有限公司 LED liquid crystal display screen brightness correction method and system

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