CN116366822A

CN116366822A - Display equipment, dynamic adjustment method and device for image brightness range

Info

Publication number: CN116366822A
Application number: CN202111605376.1A
Authority: CN
Inventors: 刁玉洁; 王烨东; 沈海杰
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2023-06-30

Abstract

The embodiment of the application provides a display device, a dynamic adjustment method and a dynamic adjustment device for an image brightness range. The display device includes: a display and a processor coupled to the display; the processor is configured to: acquiring first brightness information of an image to be displayed, wherein the first brightness information comprises brightness values corresponding to pixel points in the image; determining whether to dynamically adjust the brightness of the image according to the lowest brightness value in the first brightness information; when the dynamic adjustment of the brightness of the image is determined, adjusting the brightness value of each pixel point of the image into a brightness correction value according to the first brightness information; the display is configured to: and displaying the image according to the brightness correction value of each pixel point of the image. When the brightness of the image to be displayed is low, the detail of the image to be displayed is presented, the definition of the display picture is improved, and the display effect is optimized.

Description

Display equipment, dynamic adjustment method and device for image brightness range

Technical Field

The embodiment of the application relates to the technical field of image processing, and more particularly relates to a display device, a dynamic adjustment method of an image brightness range and a device.

Background

In some display scenes, for example, when displaying through an In-Plane Switching (IPS) screen, since the IPS screen adopts a lateral liquid crystal molecular arrangement, when the brightness of the display screen is low, the transmittance of the backlight projected light by the liquid crystal molecules is poor, resulting In that more image details of the display screen are lost.

Currently, in order to better present the details of the display screen when the brightness of the display screen is low, the brightness of the backlight is often increased. However, the higher backlight brightness is more likely to cause light leakage in the display. Therefore, how to present details of the display screen when the brightness of the display screen is low without causing light leakage of the display screen, improve the definition of the display screen, and optimize the display effect is a current problem to be solved urgently.

Disclosure of Invention

The embodiment of the application provides a display device, a dynamic adjustment method and a dynamic adjustment device for an image brightness range, which realize that details of an image to be displayed are presented when the brightness of the image to be displayed is low, improve the definition of a display picture and optimize the display effect.

In a first aspect, there is provided a display device comprising: a display and a processor coupled to the display; the processor is configured to: acquiring first brightness information of an image to be displayed, wherein the first brightness information comprises brightness values corresponding to pixel points in the image; determining whether to dynamically adjust the brightness of the image according to the lowest brightness value in the first brightness information; when the dynamic adjustment of the brightness of the image is determined, adjusting the brightness value of each pixel point of the image into a brightness correction value according to the first brightness information; the display is configured to: and displaying the image according to the brightness correction value of each pixel point of the image.

In a second aspect, a method for dynamically adjusting an image brightness range is provided, including: acquiring first brightness information of an image to be displayed, wherein the first brightness information comprises brightness values corresponding to pixel points in the image; determining whether to dynamically adjust the brightness of the image according to the lowest brightness value in the first brightness information; when the dynamic adjustment of the brightness of the image is determined, adjusting the brightness value of each pixel point of the image into a brightness correction value according to the first brightness information; and controlling a display to display the image according to the brightness correction value of each pixel point of the image.

In a third aspect, there is provided a dynamic adjustment apparatus for an image brightness range, including: the display device comprises an acquisition unit, a display unit and a display unit, wherein the acquisition unit is used for acquiring first brightness information of an image to be displayed, and the first brightness information comprises brightness values corresponding to pixel points in the image; the processing unit is used for determining whether to dynamically adjust the brightness of the image according to the lowest brightness value in the first brightness information; the processing unit is further configured to, when determining to dynamically adjust the brightness of the image, adjust the brightness value of each pixel point of the image to a brightness correction value according to the first brightness information.

In a fourth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to perform the method as in the second aspect or in various implementations thereof.

In a fifth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method as in the second aspect or implementations thereof.

In this embodiment of the present application, the processor determines whether to dynamically adjust the brightness of the image based on the lowest brightness value of the image to be displayed, and adjusts the brightness value of each pixel point according to the first brightness information of the image when determining to dynamically adjust the brightness of the image. Compared with the method for improving the picture presentation effect by improving the backlight brightness, the method for improving the picture presentation effect can not bring light leakage risk to the display while optimizing the display effect of the image.

Drawings

A schematic diagram of an operation scenario between a display device and a control apparatus according to an embodiment is exemplarily shown in fig. 1;

a hardware configuration block diagram of the display device 200 in accordance with an exemplary embodiment is illustrated in fig. 2;

fig. 3 is a flowchart of a method 300 for dynamically adjusting an image brightness range according to an embodiment of the present application;

Fig. 4 is a flowchart of a method 400 for dynamically adjusting an image brightness range according to an embodiment of the present application;

fig. 5 is a flowchart of a method 500 for dynamically adjusting an image brightness range according to an embodiment of the present application;

fig. 6 is a schematic block diagram of a dynamic adjustment device for an image brightness range according to an embodiment of the present application.

Detailed Description

For purposes of clarity, embodiments and advantages of the present application, the following description will make clear and complete the exemplary embodiments of the present application, with reference to the accompanying drawings in the exemplary embodiments of the present application, it being apparent that the exemplary embodiments described are only some, but not all, of the examples of the present application.

Based on the exemplary embodiments described herein, all other embodiments that may be obtained by one of ordinary skill in the art without making any inventive effort are within the scope of the claims appended hereto. Furthermore, while the disclosure is presented in the context of an exemplary embodiment or embodiments, it should be appreciated that the various aspects of the disclosure may, separately, comprise a complete embodiment.

It should be noted that the brief description of the terms in the present application is only for convenience in understanding the embodiments described below, and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

The terms "first," second, "" third and the like in the description and in the claims and in the above drawings are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated (Unless otherwise indicated). It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

The term "module" as used in this application 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 function associated with that element.

A schematic diagram of an operation scenario between a display device and a control apparatus according to an embodiment is exemplarily shown in fig. 1. As shown in fig. 1, a user may operate the display apparatus 200 through the mobile terminal 300 and the control device 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 infrared protocol communication or bluetooth protocol communication, and other short-range communication modes, etc., and the display device 200 is controlled by a wireless or other wired mode. The user may control the display device 200 by inputting user instructions through keys on a remote control, voice input, control panel input, etc. Such as: the user can input corresponding control instructions through volume up-down keys, channel control keys, up/down/left/right movement keys, voice input keys, menu keys, on-off keys, etc. on the remote controller to realize the functions of the control display device 200.

In some embodiments, mobile terminals, tablet computers, notebook computers, 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 running on a smart device. The application program, by configuration, can provide various controls to the user 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, implement connection communication through a network communication protocol, and achieve the purpose of one-to-one control operation and data communication. Such as: it is possible to implement a control command protocol established between the mobile terminal 300 and the display device 200, synchronize a remote control keyboard to the mobile terminal 300, and implement a function of controlling the display device 200 by controlling a user interface on the mobile terminal 300. The audio/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 device 200 is also in data communication with the server 400 via a variety of communication means. The display device 200 may be permitted to make communication connections via 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 device 200. By way of example, 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 may be multiple clusters, and may include one or more types of servers. Other web service content such as video on demand and advertising services are provided through the server 400.

The display device 200 may be a liquid crystal display, an OLED display, a projection display device. The particular display device type, size, resolution, etc. are not limited, 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 a smart network television function of a computer support function, including, but not limited to, a network television, a smart television, an Internet Protocol Television (IPTV), etc., in addition to the broadcast receiving television function.

A hardware configuration block diagram of the display device 200 according to an exemplary embodiment is illustrated in fig. 2.

In some embodiments, at least one of the controller 250, the modem 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, the display 275 is configured to receive image signals from the first processor output, and to display video content and images and components of the menu manipulation interface.

In some embodiments, display 275 includes a display assembly for presenting pictures, and a drive assembly to drive the display of images.

In some embodiments, the video content is displayed from broadcast television content, or alternatively, from various broadcast signals that may be received via a wired or wireless communication protocol. Alternatively, various image contents received from the network server side transmitted from the network communication protocol may be displayed.

In some embodiments, the display 275 is used to present a user-manipulated UI interface generated in the display device 200 and used to control the display device 200.

In some embodiments, depending on the type of display 275, a drive assembly for driving the display is also included.

In some embodiments, display 275 is a projection display and may further 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, or other network communication protocol chip or a near field communication protocol chip, and an infrared receiver.

In some embodiments, the display device 200 may establish control signal and data signal transmission and reception between the communicator 220 and the external control device 100 or the content providing device.

In some embodiments, the user interface 265 may be used to receive infrared control signals from the control device 100 (e.g., an infrared remote control, etc.).

In some embodiments, the detector 230 is a signal that the display device 200 uses to capture or interact with the external environment.

In some embodiments, the detector 230 includes an optical receiver, a sensor for capturing the intensity of ambient light, a parameter change may be adaptively displayed by capturing ambient light, etc.

In some embodiments, the detector 230 may further include an image collector, such as a camera, a video camera, etc., which may be used to collect external environmental scenes, collect attributes of a user or interact with a user, adaptively change display parameters, and recognize a user gesture to realize an interaction function 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 device 200 may adaptively adjust the display color temperature of the image. The display device 200 may be adjusted to display a colder color temperature shade of the image, such as when the temperature is higher, or the display device 200 may be adjusted to display a warmer color shade of the image when the temperature is lower.

In some embodiments, the detector 230 may also be a sound collector or the like, such as a microphone, that may be used to receive the user's sound. Illustratively, a voice signal including a control instruction for a user to control the display apparatus 200, or an acquisition environmental sound is used to recognize an environmental scene type so that the display apparatus 200 can adapt to environmental noise.

In some embodiments, as shown in fig. 2, the input/output interface 255 is configured to enable 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, command instruction data, or the like.

In some embodiments, external device interface 240 may include, but is not limited to, the following: any one or more interfaces of a high definition multimedia interface HDMI interface, an analog or data high definition component input interface, a composite video input interface, a USB input interface, an RGB port, and the like can be used. The plurality of interfaces may form a composite input/output interface.

In some embodiments, as shown in fig. 2, the modem 210 is configured to receive the broadcast television signal by a wired or wireless receiving manner, and may perform modulation and demodulation processes such as amplification, mixing, and resonance, and demodulate the audio/video signal from a plurality of wireless or wired broadcast television signals, where the audio/video signal may include a television audio/video signal carried in a television channel frequency selected by a user, and an EPG data signal.

In some embodiments, the frequency point demodulated by the modem 210 is controlled by the controller 250, and the controller 250 may send a control signal according to the 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 a broadcasting system of the television signal. Or may be differentiated into digital modulation signals, analog modulation signals, etc., depending on the type of modulation. Or it may be classified into digital signals, analog signals, etc. according to the kind of signals.

In some embodiments, the controller 250 and the modem 210 may be located in separate devices, i.e., the modem 210 may also be located in an external device to the main device in which the controller 250 is located, such as an external set-top box or the like. In this way, 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 on the memory. The controller 250 may control the overall operation of the display apparatus 200. For example: in response to receiving a user command to select to display a UI object 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 of connecting to a hyperlink page, a document, an image, or the like, or executing an operation of a program corresponding to the icon. The user command for selecting the UI object may be an input command through various input means (e.g., mouse, keyboard, touch pad, etc.) connected to the display device 200 or a voice command corresponding to a voice uttered by the user.

As shown in fig. 2, the controller 250 includes at least one of a random access Memory 251 (Random Access Memory, RAM), a Read-Only Memory 252 (ROM), a video processor 270, an audio processor 280, other processors 253 (e.g., a graphics processor (Graphics Processing Unit, GPU), a central processing unit 254 (Central Processing Unit, 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 on-the-fly programs

In some embodiments, ROM 252 is used to store instructions for various system boots.

In some embodiments, ROM 252 is used to store a basic input output system, referred to as a basic input output system (Basic Input Output System, BIOS). The system comprises a drive program and a boot operating system, wherein the drive program is used for completing power-on self-checking of the system, initialization of each functional module in the system and basic input/output of the system.

In some embodiments, upon receipt of the power-on signal, the display device 200 power starts up, the CPU runs system boot instructions in the ROM 252, copies temporary data of the operating system stored in memory into the RAM 251, in order to start up or run the operating system. When the operating system is started, the CPU copies temporary data of various applications in the memory to the RAM 251, and then, facilitates starting or running of the various applications.

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 exemplary embodiments, the CPU processor 254 may comprise a plurality of processors. The plurality of processors may include one main processor and one or more sub-processors. A main processor for performing some operations of the display apparatus 200 in the pre-power-up mode and/or displaying a picture in the 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 configured to generate various graphical objects, such as: icons, operation menus, user input instruction display graphics, and the like. The device comprises an arithmetic unit, wherein the arithmetic unit is used for receiving various interaction instructions input by a user to carry out operation and displaying various objects according to display attributes. And a renderer for rendering the various objects obtained by the arithmetic unit, wherein the rendered objects are used for being displayed on a display.

In some embodiments, video processor 270 is configured to receive external video signals, perform video processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, image composition, etc., according to standard codec protocols for input signals, and may result in signals that are displayed or played on directly displayable device 200.

In some embodiments, video processor 270 includes a demultiplexing module, a video decoding module, an image compositing module, a frame rate conversion module, a display formatting module, and the like.

The demultiplexing module is used for demultiplexing the input audio/video data stream, such as the input MPEG-2, and demultiplexes the input audio/video data stream into video signals, audio signals and the like.

And the video decoding module is used for processing the demultiplexed video signals, including decoding, scaling and the like.

And an image synthesis module, such as an image synthesizer, for performing superposition mixing processing on the graphic generator and the video image after the scaling processing according to the GUI signal input by the user or generated by the graphic generator, so as to generate an image signal for display.

The frame rate conversion module is configured to convert the input video frame rate, for example, converting the 60Hz frame rate into the 120Hz frame rate or the 240Hz frame rate, and the common format is implemented in an inserting frame manner.

The display format module is used for converting the received frame rate into a video output signal, and changing the video output signal to a signal conforming to 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 configured, where the integrated configuration may perform processing of graphics signals output to the display, and the separate configuration may perform different functions, such as gpu+ FRC (Frame Rate Conversion)) architecture, respectively.

In some embodiments, the audio processor 280 is configured to receive an external audio signal, decompress and decode the audio signal according to a standard codec protocol of an input signal, and perform noise reduction, digital-to-analog conversion, and amplification processing, so as to obtain a sound signal that can be played in a speaker.

In some embodiments, video processor 270 may include one or more chips. The audio processor may also comprise one or more chips.

In some embodiments, video processor 270 and 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 the controller 250, receives sound signals output by the audio processor 280, such as: the speaker 286, and an external sound output terminal that can be output to a generating device of an external device, other than the speaker carried by the display device 200 itself, such as: external sound interface or earphone interface, etc. can also include the close range 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 input from an external power source to the display device 200 under the control of the controller 250. The power supply 290 may include a built-in power circuit installed inside the display device 200, or may be an external power source installed in the display device 200, and a power interface for providing an external power source in the display device 200.

The user interface 265 is used to receive an input signal from a user and then transmit the received user input signal to the controller 250. The user input signal may be a remote control signal received through an infrared receiver, and various user control signals may be received through a network communication module.

In some embodiments, a user inputs a user command through the control apparatus 100 or the mobile terminal 300, the user input interface is then responsive to the user input through the controller 250, and the display device 200 is then responsive to the user input.

In some embodiments, a user may input a user command through a Graphical User Interface (GUI) displayed on the display 275, and the user input interface receives the user input command through the Graphical User Interface (GUI). Alternatively, the user may input the user command by inputting a specific sound or gesture, and the user input interface recognizes the sound or gesture through the sensor to receive the user input command.

In some embodiments, a "user interface" is a media interface for interaction and exchange of information between an application or operating system and a user that enables conversion between an internal form of information and a form acceptable to the user. A commonly used presentation form of the user interface is a graphical user interface (Graphic User Interface, GUI), which refers to a user interface related to computer operations that is displayed in a graphical manner. It may be an interface element such as an icon, window, control, etc. displayed in the display of the electronic device, where the control may include a visual interface element such as an icon, button, menu, tab, text box, dialog box, status bar, navigation bar, widget, etc.

The memory 260 includes memory 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, various service modules, and the like.

The base module is a bottom software module for signal communication between the various hardware in the display device 200 and for sending processing and control signals to the upper modules. The detection module is used for collecting various information from various sensors or user input interfaces and carrying out digital-to-analog conversion and analysis management.

For example, the voice recognition module includes 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, the Ul 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 data communication between the browsing servers. And the service module is used for providing various services and various application programs. Meanwhile, the memory 260 also stores received external data and user data, images of various items in various user interfaces, visual effect maps of focus objects, and the like.

The execution body of the embodiment of the present application may be the display device 200 in fig. 1, or the processor in the display device, or an external device connected to the display device, or the like, which is not limited in this application.

Alternatively, the display disposed in the display device may be, for example, an IPS display. It is understood that an IPS display is a display in which an IPS screen (or referred to as an IPS liquid crystal panel) is disposed.

The dynamic adjustment method of the image brightness range is suitable for any display technology, and is particularly suitable for an IPS display technology.

The IPS display changes the arrangement of liquid crystal molecules, and laterally aligns the liquid crystal molecules. On one hand, the liquid crystal molecule arrangement mode enables the IPS display to have a larger visual angle, and the visual angle of the IPS hard screen panel can reach 178 degrees generally; on the other hand, based on the liquid crystal molecule arrangement mode, the IPS display can adopt a horizontal conversion technology to accelerate the deflection speed of liquid crystal molecules, so that the response speed of a liquid crystal screen is faster and more stable, and when continuous dynamic pictures are processed, the motion track of images is finer and clearer, and the problems of image smear and shake are avoided.

However, it is also based on the lateral alignment of the liquid crystal molecules of IPS displays that the liquid crystal molecules have poor light transmittance for the backlight projected light. Based on this, in order to better present the details of the image, to improve the definition of the image, it is necessary to increase the backlight brightness of the IPS display, resulting in the IPS display being prone to light leakage.

It is understood that the embodiments of the present application are only described by way of example in terms of IPS displays, and are not intended to limit the present application in any way.

In view of the above technical problems, the embodiments of the present application determine whether to dynamically adjust the brightness of an image based on the lowest brightness value of the image to be displayed, and adjust the brightness value of each pixel point according to the (first) brightness information of the image when determining to dynamically adjust the brightness of the image. Compared with the method for improving the picture presentation effect by improving the backlight brightness, the method for improving the picture presentation effect can not bring light leakage risk to the display while optimizing the display effect of the image.

Methods provided in the embodiments of the present application will be described below with reference to the accompanying drawings.

In the embodiment of the present application, a processor (such as the processor 254 in fig. 2) in a display device (such as the display device 200 in fig. 1 or fig. 2) is used as an execution subject.

Fig. 3 is a flowchart of a method 300 for dynamically adjusting an image brightness range according to an embodiment of the present application. As shown in fig. 3, the method specifically includes some or all of the following steps:

s310, acquiring first brightness information of an image to be displayed, wherein the first brightness information comprises brightness values corresponding to pixel points in the image;

s320, determining whether to dynamically adjust the brightness of the image according to the lowest brightness value in the first brightness information;

s330, when the dynamic adjustment of the brightness of the image is determined, adjusting the brightness value of each pixel point of the image to be a correction value according to the first brightness information;

s340, controlling the display to display the image according to the brightness correction value of each pixel point of the image.

For the above S310, it should be noted that the processor obtains the brightness value corresponding to each pixel point in the image to be displayed, that is, obtains the first brightness information. For example, the processor may acquire the first luminance information during the rendering of the image to be displayed, or acquire the first luminance information after the rendering of the image to be displayed is completed, or acquire the first luminance information before the image rendering of the image to be displayed.

Alternatively, the image to be displayed (hereinafter referred to as an image) may be a separate image or a frame of image in a video data stream.

Alternatively, the brightness value corresponding to each pixel point may be any value between 0 and 255, for example.

In S320, the processor may dynamically adjust the brightness of the image when the lowest brightness value in the first brightness information is smaller than a preset value (e.g., a first threshold hereinafter); or the processor may dynamically adjust the brightness of the image when the lowest brightness value in the first brightness information is a preset value (e.g., 0).

In S330, the luminance correction value of each pixel may be larger (i.e., higher luminance) or smaller (i.e., lower luminance) than the original luminance value thereof. In other words, the processor may adjust the brightness value of each pixel point based on different adjustment strategies. For example, the luminance value of the pixel having a low luminance value may be adjusted to be higher, the luminance value of the pixel having a high luminance value may be unchanged, the luminance value of the pixel having a high luminance value may be adjusted to be higher, or the luminance value of the pixel having a high luminance value may be adjusted to be lower.

Taking an IPS display as an example, when the lowest luminance value in the first luminance information is smaller than the preset value, in order to enable the IPS to perform better detail presentation on the portion with the lower luminance value, the processor may adjust the luminance value of each pixel of the image to be higher, or at least adjust the luminance value of the pixel with the luminance value smaller than the preset value to be higher.

It will be appreciated that the adjustment of the brightness value of each pixel point in the image may implement the adjustment of the brightness range of the image, for example, it is assumed that the minimum brightness value in the first brightness information of the image is 0, the maximum brightness value is 100, and after the brightness value of each pixel point in the image is adjusted, the minimum brightness value is 30, and the maximum brightness value is 105, that is, the adjustment of the brightness range of the image is obtained.

In S340, the brightness value of each pixel of the image displayed by the display is the brightness correction value, so that the image can have better display effect, such as clearer, better contrast, etc.

Therefore, in the embodiment of the application, the processor determines whether to dynamically adjust the brightness of the image based on the lowest brightness value of the image to be displayed, and adjusts the brightness value of each pixel point according to the first brightness information of the image when determining to dynamically adjust the brightness of the image. Compared with the method for improving the picture presentation effect by improving the backlight brightness, the method for improving the picture presentation effect can not bring light leakage risk to the display while optimizing the display effect of the image.

Fig. 4 is a flowchart of a method 400 for dynamically adjusting an image brightness range according to an embodiment of the present application. As shown in fig. 4, the method includes:

s410, acquiring first brightness information of an image to be displayed.

If the lowest brightness value in the first brightness information is smaller than the first threshold value, the following S421 is executed; if the lowest luminance value in the first luminance information is greater than or equal to the first threshold value, the following S423 is performed.

S421, determining a first proportion, wherein the first proportion is a ratio of the number of first pixel points in the image to the number of all pixel points, and the brightness value of the first pixel points is smaller than the first threshold value.

Further, it is determined whether to dynamically adjust the brightness of the image based on the first ratio and the second threshold.

For example, if the first ratio is greater than the second threshold, then the following S422 is performed; if the first ratio is less than or equal to the second threshold, then S423 is performed as follows.

S422, it is determined to adjust the brightness of the image.

S423, it is determined that the brightness of the image is not adjusted.

S430, when the dynamic adjustment of the brightness of the image is determined, adjusting the brightness value of each pixel point of the image to be a correction value according to the first brightness information;

S440, controlling the display to display the image according to the brightness correction value of each pixel point of the image.

The above S410, S430 and S440 have the same or similar implementation manner and technical effects as S310, S330 and S340 in the embodiment shown in fig. 3, and are not repeated here.

S421 to S423 are one possible implementation of S320 in the embodiment shown in fig. 3. The following descriptions are needed for S421 to S423:

the processor may determine whether to dynamically adjust the brightness of the image by determining a first ratio in a case where a lowest brightness value in the first brightness information is less than a first threshold. For example, when the first ratio is greater than the second threshold, it is determined that the brightness of the image is adjusted, and when the first ratio is less than or equal to the second threshold, it is determined that the brightness of the image is not adjusted.

Still taking an IPS display as an example, the IPS display cannot present details of an image in the case where the luminance value of the image is low (i.e., dark field). For example, when the brightness value of the pixel point is 0-9, there is a dark field detail loss, in this case, the first threshold may be 10, if the lowest brightness value in the first brightness information is smaller than the first threshold 10, it is determined that the proportion of the pixel point with the brightness value smaller than the first threshold 10 to all the pixels of the image, that is, the first proportion, if the first proportion is greater than the second threshold, it indicates that the area of the whole dark field area of the image is larger, and the brightness of the image needs to be adjusted, so that the image is better presented in the IPS display.

Alternatively, the second threshold may be any value less than 1 and greater than 0, such as 0.3, 0.5, 0.8, etc.

It will be appreciated that if the lowest luminance value in the first luminance information of the image is less than the first threshold value, but the first ratio is less than or equal to the second threshold value, which indicates that although there are pixels of the image with lower luminance values, the pixels are fewer, and the effect on the presentation of the image is not (or is limited), the processor does not adjust the luminance of the image.

It should also be understood that if the lowest luminance value in the first luminance information of the image is greater than or equal to the first threshold value, it indicates that the luminance value of each pixel point in the image can meet the requirement of the rendering effect, so that no adjustment is required for the luminance of the image.

Fig. 5 is a flowchart of a method 500 for dynamically adjusting an image brightness range according to an embodiment of the present application.

S531 and S532 in fig. 5 are one possible implementation of S330 in the embodiment shown in fig. 3 and S430 in the embodiment shown in fig. 4. Fig. 5 is only described by way of example with respect to the implementation based on fig. 3.

As shown in fig. 5, the method includes:

s510, acquiring first brightness information of an image to be displayed, wherein the first brightness information comprises brightness values corresponding to pixel points in the image;

S520, determining whether to dynamically adjust the brightness of the image according to the lowest brightness value in the first brightness information;

s531, determining a brightness adjustment amount according to the highest brightness value in the first brightness information;

s532, the brightness value of the pixel point of the image is adjusted to the brightness correction value according to the brightness adjustment amount.

S540, the control display displays the image according to the brightness correction value of each pixel point of the image.

The above S510, S520 and S540 are the same as or similar to S310, S320 and S340, respectively, in the embodiment shown in fig. 3, and will not be described here again.

In some embodiments, the brightness adjustment may be preset, for example, if it is determined to dynamically adjust the brightness of the image, the processor may add the brightness value of the pixel of the image to the brightness adjustment to obtain the brightness correction value.

In other embodiments, to avoid saturation of the brightness of the image after the brightness of the image is adjusted, the brightness adjustment amount may be determined based on the highest brightness value in the first brightness information. For this implementation manner, the implementation may be achieved by the above S531 and S532, which are specifically described as follows:

in S531, if the highest luminance value in the first luminance information is smaller than the third threshold, the luminance adjustment amount is determined as the first adjustment amount, and the first adjustment amount is determined according to the first threshold and the lowest luminance value in the first luminance information. For example, the first adjustment amount may be a difference between the first threshold value x and the lowest luminance value Lmin in the first luminance information.

In an exemplary embodiment, the processor adds the brightness value of each pixel of the image to the first adjustment amount to obtain a brightness correction value of each pixel of the image. For example, the luminance correction value Yout of each pixel may satisfy the following formula (1):

Yout＝Yin+(x-Lmin) (1)

the Yin is the luminance value before correction of the pixel.

And if the highest brightness value in the first brightness information is greater than or equal to the third threshold value, determining the brightness adjustment amount as a second adjustment amount, wherein the second adjustment amount is determined according to the first threshold value and the highest brightness value in the first brightness information. For example, the second adjustment amount includes a first ratio and the first threshold; the first ratio is the ratio of the difference between the first value and the first threshold value to the first value, and the first value is the maximum value of the pixel brightness of the color space to which the image belongs.

For example, in the RGB color space, the maximum pixel brightness value is 255, and the first ratio is

In an exemplary embodiment, the processor multiplies the brightness value of each pixel of the image by a first ratio and then adds the first ratio to a first threshold to obtain a brightness correction value of each pixel of the image. For example, the luminance correction value Yout of each pixel may satisfy the following formula (2):

In this embodiment, when the highest luminance value in the first luminance information is greater than or equal to the third threshold value, it indicates that there is a pixel with a larger luminance value in the image, and in this case, if the luminance value of each pixel is adjusted according to the first adjustment amount, the pixel with a larger luminance value will reach the highlight saturation after the luminance dynamic adjustment, and the luminance value of each pixel is adjusted according to the first adjustment amount, so that the luminance of the pixel with a lower luminance value can be greatly increased, and the luminance of the pixel with a higher luminance value can be slightly increased, even without increasing the luminance value of the pixel with a higher luminance value.

Fig. 6 is a schematic block diagram of a dynamic adjustment device for an image brightness range according to an embodiment of the present application. As shown in fig. 6, the apparatus 600 includes:

an obtaining unit 610, configured to obtain first luminance information of an image to be displayed, where the first luminance information includes luminance values corresponding to pixel points in the image;

a processing unit 620, configured to determine whether to dynamically adjust the brightness of the image according to the lowest brightness value in the first brightness information;

the processing unit 620 is further configured to, in a case where it is determined to dynamically adjust the brightness of the image, adjust the brightness value of each pixel of the image to a brightness correction value according to the first brightness information.

In some embodiments, the processing unit 620 is specifically configured to: if the lowest brightness value in the first brightness information is smaller than a first threshold value, determining a first proportion, wherein the first proportion is the ratio of the number of first pixel points in the image to the number of all pixel points, and the brightness value of the first pixel points is smaller than the first threshold value; and determining whether to dynamically adjust the brightness of the image according to the first proportion and the second threshold value.

In some embodiments, the processing unit 620 is specifically configured to: if the first ratio is greater than the second threshold, determining to adjust the brightness of the image; otherwise, it is determined that the brightness of the image is not adjusted.

In some embodiments, the processing unit 620 is further configured to: if the lowest brightness value in the first brightness information is greater than or equal to the first threshold value, determining that the backlight brightness of the image is not adjusted.

In some embodiments, the processing unit 620 is specifically configured to: determining a brightness adjustment amount according to the highest brightness value in the first brightness information; and adjusting the brightness value of the pixel point of the image into the brightness correction value according to the brightness adjustment quantity.

In some embodiments, the processing unit 620 is specifically configured to: if the highest brightness value in the first brightness information is smaller than the third threshold value, determining the brightness adjustment amount as a first adjustment amount, wherein the first adjustment amount is determined according to the first threshold value and the lowest brightness value in the first brightness information.

In some embodiments, the first adjustment amount is a difference between the first threshold value and a lowest luminance value in the first luminance information.

In some embodiments, the processing unit 620 is specifically configured to: and adding the brightness value of each pixel point of the image with the first adjustment amount to obtain a brightness correction value of each pixel point of the image.

In some embodiments, the processing unit 620 is specifically configured to: and if the highest brightness value in the first brightness information is greater than or equal to the third threshold value, determining the brightness adjustment amount as a second adjustment amount, wherein the second adjustment amount is determined according to the first threshold value and the highest brightness value in the first brightness information.

In some embodiments, the second adjustment comprises a first ratio and the first threshold; the first ratio is the ratio of the difference between the first value and the first threshold value to the first value, and the first value is the maximum value of the pixel brightness of the color space to which the image belongs.

In some embodiments, the processing unit 620 is specifically configured to: and multiplying the brightness value of each pixel point of the image by the first ratio, and adding the first ratio to the first threshold value to obtain the brightness correction value of each pixel point of the image.

The dynamic adjustment device for the image brightness range provided in the above embodiment may implement the technical solution of the above method embodiment, and its implementation principle and technical effect are similar, and are not repeated here.

The present application also provides a computer-readable storage medium, which may include: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk or an optical disk, etc., in which program codes may be stored, and in particular, the computer-readable storage medium stores program instructions for the methods in the above embodiments.

The present application also provides a program product comprising execution instructions stored in a readable storage medium. The at least one processor of the electronic device may read the execution instructions from the readable storage medium, and execution of the execution instructions by the at least one processor causes the electronic device to implement the video playback method provided by the various embodiments described above.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution 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, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions 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

1. A display device, characterized by comprising: a display and a processor coupled to the display;

the processor is configured to:

acquiring first brightness information of an image to be displayed, wherein the first brightness information comprises brightness values corresponding to pixel points in the image;

determining whether to dynamically adjust the brightness of the image according to the lowest brightness value in the first brightness information;

when the dynamic adjustment of the brightness of the image is determined, adjusting the brightness value of each pixel point of the image into a brightness correction value according to the first brightness information;

the display is configured to: and displaying the image according to the brightness correction value of each pixel point of the image.

2. The device of claim 1, wherein the processor is configured to:

if the lowest brightness value in the first brightness information is smaller than a first threshold value, determining a first proportion, wherein the first proportion is a ratio of the number of first pixel points in the image to the number of all pixel points, and the brightness value of the first pixel points is smaller than the first threshold value;

and determining whether to dynamically adjust the brightness of the image according to the first proportion and the second threshold value.

3. The device of claim 2, wherein the processor is configured to:

if the first proportion is larger than the second threshold value, determining to adjust the brightness of the image;

otherwise, determining that the brightness of the image is not adjusted.

4. A device according to any one of claims 2 to 3, wherein the processor is configured to:

determining a brightness adjustment amount according to the highest brightness value in the first brightness information;

and adjusting the brightness value of the pixel point of the image into the brightness correction value according to the brightness adjustment quantity.

5. The device of claim 4, wherein the processor is configured to:

And if the highest brightness value in the first brightness information is smaller than a third threshold value, determining the brightness adjustment amount as a first adjustment amount, wherein the first adjustment amount is determined according to the first threshold value and the lowest brightness value in the first brightness information.

6. The apparatus of claim 5, wherein the first adjustment amount is a difference between the first threshold and a lowest luminance value in the first luminance information;

the processor is configured to:

and adding the brightness value of each pixel point of the image with the first adjustment amount to obtain a brightness correction value of each pixel point of the image.

7. The device of claim 4, wherein the processor is configured to:

and if the highest brightness value in the first brightness information is greater than or equal to the third threshold value, determining the brightness adjustment amount as a second adjustment amount, wherein the second adjustment amount is determined according to the first threshold value and the highest brightness value in the first brightness information.

8. The apparatus of claim 7, wherein the second adjustment amount comprises a first ratio and the first threshold; the first ratio is the ratio of the difference between the first value and the first threshold value to the first value, and the first value is the maximum value of the pixel brightness of the color space to which the image belongs;

The processor is configured to:

and multiplying the brightness value of each pixel point of the image by the first ratio, and adding the first ratio to the first threshold value to obtain the brightness correction value of each pixel point of the image.

9. A method for dynamically adjusting the brightness range of an image, comprising:

and controlling a display to display the image according to the brightness correction value of each pixel point of the image.

10. A dynamic adjustment device for an image brightness range, comprising:

the display device comprises an acquisition unit, a display unit and a display unit, wherein the acquisition unit is used for acquiring first brightness information of an image to be displayed, and the first brightness information comprises brightness values corresponding to pixel points in the image;

the processing unit is used for determining whether to dynamically adjust the brightness of the image according to the lowest brightness value in the first brightness information;

The processing unit is further configured to, when determining to dynamically adjust the brightness of the image, adjust the brightness value of each pixel point of the image to a brightness correction value according to the first brightness information.