CN111899680A - Display device and setting method thereof - Google Patents
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- CN111899680A CN111899680A CN202010674400.6A CN202010674400A CN111899680A CN 111899680 A CN111899680 A CN 111899680A CN 202010674400 A CN202010674400 A CN 202010674400A CN 111899680 A CN111899680 A CN 111899680A
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application provides a display device and a setting method thereof. The method comprises the following steps: acquiring a frame rate of a video signal; if the frame rate of the video signal is greater than or equal to the minimum refresh rate of the display module and less than or equal to the maximum refresh rate of the display module, setting the refresh rate of the display module to be equal to the frame rate of the video signal, otherwise, setting the refresh rate of the display module to be equal to a preset refresh rate; and setting the backlight pulse width modulation frequency of the display module according to the refresh rate of the display module and the preset screen refresh rate of the shooting equipment, so that the backlight pulse width modulation frequency of the display module is equal to N times of the minimum common multiple, and N is greater than or equal to 10 and is an integral multiple of 10, thereby reducing interference of bright and dark bands of a shot image and further improving the quality of information transmission.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display device and a setting method thereof.
Background
With the wide application of smart phones and cameras, sharing content displayed by display equipment through operations such as photographing and video recording is more and more extensive. However, the refresh rate of the display module, the frequency of the backlight Pulse Width Modulation (PWM), the shutter frequency of the photographing device, and the screen refresh rate of the photographing device are not consistent, so that bright and dark band interference exists in the photographed image, and the information transmission effect is affected.
The method for solving the interference of bright and dark bands of the shot image is mainly to carry out hardware optimization design on the basis of the display module to improve the refresh rate of the display module and improve the performance of the display module by improving the backlight frequency, so that the interference of the bright and dark bands is reduced, but the method has higher cost. In the method, the principle of the function of reducing the flicker is to set the shutter speed to adapt to the refresh rate of the display module and the screen refresh rate of the shooting device, but the method has poor effect.
Therefore, reducing the interference of bright and dark bands generated when the content image displayed by the display device is shot is a problem to be solved at present.
Disclosure of Invention
The application provides a display and a method for improving interference of bright and dark bands of images of the display, which are used for reducing the interference of the bright and dark bands of shot images and further improving the quality of information transmission.
In a first aspect, the present application provides a display device setting method, including:
acquiring a frame rate of a video signal;
if the frame rate of the video signal is greater than or equal to the minimum refresh rate of the display module and less than or equal to the maximum refresh rate of the display module, setting the refresh rate of the display module to be equal to the frame rate of the video signal, otherwise, setting the refresh rate of the display module to be equal to the preset refresh rate;
and setting the backlight pulse width modulation frequency of the display module according to the refresh rate of the display module and the preset screen refresh rate of the shooting equipment.
In the embodiment of this application, according to the refresh rate of display module assembly and the screen refresh rate of the shooting equipment that sets up in advance, set up the pulse width modulation frequency in a poor light of display module assembly, include:
determining the minimum common multiple of the refresh rate of the display module and the screen refresh rate of the shooting equipment;
and setting the backlight pulse width modulation frequency according to the N times of the least common multiple, so that the backlight pulse width modulation frequency of the display module is equal to the N times of the least common multiple, and N is greater than or equal to 10 and is an integral multiple of 10.
In the embodiment of the application, the minimum common multiple of the refresh rate of the display module and the screen refresh rate of the shooting device is determined, including:
acquiring a preset screen refresh rate list of the shooting equipment, wherein the screen refresh rate list comprises at least one screen refresh rate of the shooting equipment;
and determining the refresh rate of the display module and the minimum common multiple of the screen refresh rates of all the shooting devices in the screen refresh rate list.
In an embodiment of the present application, acquiring a frame rate of a video signal includes:
when it is detected that the communication interface is accessed by the video signal, acquiring a frame rate of the accessed video signal, or
And receiving an instruction for switching the video signal format, switching the video signal format according to the instruction, and acquiring the frame rate of the switched video signal.
In a second aspect, an embodiment of the present application provides a display device, including:
an acquisition module configured to acquire a frame rate of a video signal;
the refresh rate determining module is configured to judge whether the frame rate of the video signal is greater than or equal to the minimum refresh rate of the display module and less than or equal to the maximum refresh rate of the display module, if so, the refresh rate of the display module is set to be equal to the frame rate of the video signal, otherwise, the refresh rate of the display module is set to be equal to the preset refresh rate;
and the backlight pulse width modulation frequency determining module is configured to set the backlight pulse width modulation frequency of the display module according to the refresh rate of the display module and the preset screen refresh rate of the shooting device.
In an embodiment of the application, the backlight pulse width modulation frequency determination module is configured to:
determining the minimum common multiple of the refresh rate of the display module and the screen refresh rate of the shooting equipment;
and setting the backlight pulse width modulation frequency according to the N of the least common multiple, so that the backlight pulse width modulation frequency of the display module is equal to the N of the least common multiple, and the N is greater than or equal to 10 and is an integral multiple of 10.
In an embodiment of the application, the backlight pulse width modulation frequency determination module is configured to:
acquiring a preset screen refresh rate list of the shooting equipment, wherein the screen refresh rate list comprises at least one screen refresh rate of the shooting equipment;
and determining the refresh rate of the display module and the minimum common multiple of the screen refresh rates of all the shooting devices in the screen refresh rate list.
In an embodiment of the application, the obtaining module is configured to:
when it is detected that the communication interface is accessed by the video signal, acquiring a frame rate of the accessed video signal, or
And receiving an instruction for switching the video signal format, switching the video signal format according to the instruction, and acquiring the frame rate of the switched video signal.
In a third aspect, an embodiment of the present application provides a display device, including a display, a memory, a controller, and a communication interface:
a display connected with the controller and configured to display the video signal;
a memory coupled to the controller and configured to store computer instructions;
the communication interface is connected with the controller and used for receiving and transmitting data under the control of the controller;
a controller configured to perform the following operations in accordance with computer instructions:
acquiring a frame rate of a video signal;
if the frame rate of the video signal is greater than or equal to the minimum refresh rate of the display module and less than or equal to the maximum refresh rate of the display module, setting the refresh rate of the display module to be equal to the frame rate of the video signal, otherwise, setting the refresh rate of the display module to be equal to the preset refresh rate;
and setting the backlight pulse width modulation frequency of the display module according to the refresh rate of the display module and the preset screen refresh rate of the shooting equipment.
In a fourth aspect, an embodiment of the present application provides a display device, including: drive assembly, video processor, display module assembly:
a driving component configured to drive a display video signal;
a video processor configured to process the video signal according to a standard codec protocol of the video signal;
and the backlight pulse width modulation frequency of the display module is configured to be N times of the least common multiple of the frame frequency of the video signal and the screen refresh rate of the at least one shooting device, and N is greater than or equal to 10 and is an integral multiple of 10.
In the above embodiment of the present application, the refresh rate of the display module is set by comparing the frame rate of the acquired video signal with the minimum refresh rate and the maximum refresh rate of the display module, if the frame rate of the video signal is greater than or equal to the minimum refresh rate of the display module and less than or equal to the maximum refresh rate of the display module, the refresh rate of the display module is set to be equal to the frame rate of the video signal, otherwise, the refresh rate of the display module is set to be equal to the preset refresh rate, and the backlight pulse width modulation frequency of the display module is set according to the refresh rate of the display module and the preset screen refresh rate of the shooting device, so that the interference of bright and dark bands of the shot image is reduced, and the quality of information transmission is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic diagram illustrating an application scenario for setting display device settings according to an embodiment of the present application;
fig. 2 is a block diagram illustrating a hardware configuration of a display device 200 in an embodiment of the present application;
fig. 3 is a schematic diagram illustrating a functional configuration of a display device 200 in an embodiment of the present application;
fig. 4 is a schematic diagram illustrating a functional structure of the display device 200 in the embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the exemplary embodiments of the present application clearer, the technical solutions in the exemplary embodiments of the present application will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present application, and it is obvious that the described exemplary embodiments are only a part of the embodiments of the present application, but not all the embodiments. Moreover, while the disclosure herein has been presented in terms of exemplary one or more examples, it is to be understood that each aspect of the disclosure can be utilized independently and separately from other aspects of the disclosure to provide a complete disclosure.
Furthermore, the terms "comprises" and "comprising," as well as 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.
Fig. 1 is a schematic diagram illustrating an application scenario for setting display device settings according to an embodiment of the present application. As shown in fig. 1, the user may operate the display device 200 through the mobile terminal 300a and the control apparatus 100, and the video content displayed by the display device 200 is photographed through the mobile terminal 300a and the mobile terminal 300 b.
The control device 100 may control the display device 200 in a wireless or other wired manner by using a remote controller, including infrared protocol communication, bluetooth protocol communication, other short-distance communication manners, and the like. 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 can input a corresponding control command through a volume up/down key, a channel control key, up/down/left/right moving keys, a voice input key, a menu key, a power on/off key, etc. on the remote controller, to implement the function of controlling the display device 200.
In some embodiments, display device 200 may be provided with physical keys, such as a "volume +" key, a "volume-" key, a "channel +" key, a "channel-" key, etc., that allow display device 200 to be controlled via the physical keys.
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.
For example, the mobile terminal 300a may install a software application with the display device 200, implement connection communication through a network communication protocol, and implement the purpose of one-to-one control operation and data communication. Such as: the control instruction protocol can be established between the mobile terminal 300a and the display device 200, the remote control keyboard is synchronized to the mobile terminal 300a, and the function of controlling the display device 200 is realized by controlling the user interface on the mobile terminal 300 a. The audio and video content displayed on the mobile terminal 300a can also be transmitted to the display device 200, so as to realize the synchronous display function. The following steps are repeated: a control instruction may be sent to the display device 200 through a user interface of the mobile terminal 300a, and the format of the audio/video signal displayed by the display device 200 may be controlled through the control instruction.
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 servers 400 may be a group or groups of servers, and may be 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, 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 that provides a computer support function in addition to the broadcast receiving tv function. Examples include a web tv, a smart tv, an Internet Protocol Tv (IPTV), and the like.
A hardware configuration block diagram of a display device 200 according to an exemplary embodiment is exemplarily shown in fig. 2. As shown in fig. 2, the display device 200 includes a controller 210, a tuning demodulator 220, a communication interface 230, a detector 240, an input/output interface 250, a video processor 260-1, an audio processor 260-2, a display 280, an audio output 270, a memory 290, a power supply, and an infrared receiver.
A display 280 for receiving the image signal from the video processor 260-1 and displaying the video content and image and components of the menu manipulation interface. The display 280 includes a display module (including a display screen) for displaying images and a driving component for driving the images to display. The video content may be displayed from broadcast television content, or may be broadcast signals that may be received via a wired or wireless communication protocol. Alternatively, various image contents received from the network communication protocol and sent from the network server side can be displayed.
Meanwhile, the display 280 simultaneously displays a user manipulation UI interface generated in the display apparatus 200 and used to control the display apparatus 200. And, a driving component for driving the display according to the type of the display 280. Alternatively, in case the display 280 is a projection display, it may also comprise a projection device and a projection screen.
The communication interface 230 is a component for communicating with an external device or an external server according to various communication protocol types. For example: the communication interface 230 may be a Wifi chip 231, a bluetooth communication protocol chip 232, a wired ethernet communication protocol chip 233, or other network communication protocol chips or near field communication protocol chips, and an infrared receiver (not shown).
The display apparatus 200 may establish control signal and data signal transmission and reception with an external control apparatus or a content providing apparatus through the communication interface 230. And an infrared receiver, an interface device for receiving an infrared control signal for controlling the apparatus 100 (e.g., an infrared remote controller, etc.).
The detector 240 is a signal used by the display device 200 to collect an external environment or interact with the outside. The detector 240 includes a light receiver 242, a sensor for collecting the intensity of ambient light, and parameters such as parameter changes can be adaptively displayed by collecting the ambient light. The image acquisition device 241, such as a camera and a camera, may be used to acquire an external environment scene, acquire attributes of a user or interact gestures with the user, adaptively change display parameters, and recognize gestures of the user, so as to implement an interaction function with the user.
The input/output interface 250 controls data transmission between the display device 200 of the controller 210 and other external devices. Such as receiving video and audio signals or command instructions from an external device. Input/output interface 250 may include, but is not limited to, the following: any one or more of high definition multimedia interface HDMI interface 251, analog or data high definition component input interface 253, composite video input interface 252, USB input interface 254, RGB ports (not shown in the figures), etc.
The tuning demodulator 220 receives the broadcast television signals in a wired or wireless receiving manner, may perform modulation and demodulation processing such as amplification, frequency mixing, resonance, and the like, and demodulates the television audio/video signals carried in the television channel frequency selected by the user and the EPG data signals from the plurality of wireless or wired broadcast television signals. May be responsive to the user-selected television signal frequency and the television signal carried by that frequency, as selected by the user and as controlled by the controller 210.
In other exemplary embodiments, the tuner/demodulator 220 may be in an external device, such as an external set-top box. In this way, the set-top box outputs television audio/video signals after modulation and demodulation, and the television audio/video signals are input into the display device 200 through the input/output interface 250.
The video processor 260-1 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.
The audio processor 260-2 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, amplification processing, and the like to obtain an audio signal that can be played in the speaker.
An audio output 270, under the control of the controller 210, receiving the sound signal output by the audio processor 260-2, such as: the speaker 272, and the external sound output terminal 274 that can be output to the generation device of the external device, in addition to the speaker 272 carried by the display device 200 itself, such as: an external sound interface or an earphone interface and the like.
The power supply provides power supply support for the display device 200 from the power input from the external power source under the control of the controller 210. The power supply may include a built-in power supply circuit installed inside the display device 200, or may be a power supply interface installed outside the display device 200 to provide an external power supply in the display device 200.
A user input interface for receiving an input signal of a user and then transmitting the received user input signal to the controller 210. 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.
For example, the user inputs a user command through the remote controller 100 or the mobile terminal 300, the user input interface responds to the user input through the controller 210 according to the user input, and the display device 200 responds to the user input.
In some embodiments, a user may enter a user command on a Graphical User Interface (GUI) displayed on the display 280, 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 receives the user input command by recognizing the sound or gesture through the sensor.
The controller 210 controls the operation of the display apparatus 200 and responds to the user's operation through various software control programs stored in the memory 290.
As shown in fig. 2, the controller 210 includes a RAM213 and a ROM214, and a graphic processor 216, a CPU processor 212, a communication interface 218, such as: a first interface 218-1 through an nth interface 218-n, and a communication bus. The RAM213 and the ROM214, the graphic processor 216, the CPU processor 212, and the communication interface 218 are connected via a bus.
And a RAM213 for storing instructions for various system boots. If the display apparatus 200 starts power-on upon receipt of the power-on signal, the CPU processor 212 executes a system boot instruction in the ROM, copies the operating system stored in the memory 290 to the RAM213, and starts running the boot operating system. After the start of the operating system is completed, the CPU processor 212 copies the various application programs in the memory 290 to the RAM213, and then starts running and starting the various application programs.
A graphics processor 216 for generating 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 a renderer for generating various objects based on the operator and displaying the rendered result on the display 280.
A CPU processor 212 for executing operating system and application program instructions stored in memory 290. 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.
The controller 210 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 280, the controller 210 may perform an operation related to the object selected by the user command.
Wherein 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 the 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.
It should be noted that fig. 1-2 are only examples, and the display device 200 may also be an electronic device with a display screen, such as a tablet computer, a computer, and the like. The display screen can be a liquid crystal display screen, an LED display screen and the like, and the display module is used for providing backlight to display screen contents.
For the purpose of clearly describing the embodiments of the present application, the terms used in the embodiments of the present application will be explained below.
Pulse width modulation is a method for digitally encoding the level of an analog signal and is widely used in a backlight control part of a display module to adjust the backlight pulse width modulation frequency of an LED of the display module.
The refresh rate of the display module is related to the type of the display device, and for the CTR display device, the refresh rate of the display module is the number of times that the electron beam repeatedly scans the image on the screen, and for the liquid crystal or LED display device, the refresh rate of the display module is the number of still pictures displayed per second. Wherein, the higher the refresh rate of the display module, the more stable the displayed image (picture) is.
For a display module adopting an LED display screen, the output of light is mostly controlled by a driving circuit. The basic properties of LEDs are: the characteristics of the emitted light are shifted with the average drive current and setting the period and duty cycle by pulse width modulation is a simple digital dimming method.
At present, the screen refresh rate of a mobile phone is usually 60 Hertz (HZ), 90H, and 120HZ, the refresh rate supported by a display module of a display device when driving display is 30HZ to 70HZ, and the frame rate of a video signal is usually 30HZ, 50H, and 60 HZ. The main reason for generating the bright and dark band interference is that the backlight pulse width modulation frequency and the refresh rate of the display module of the display device are asynchronous, which causes the bright and dark band interference.
In daily life, the video content displayed on the display device is always bright and is not really seen by human eyes. The video content displayed by the display device is formed by continuously refreshing pictures of one frame by one frame, and a row-by-row refreshing mode from left to right and from top to bottom is generally adopted. When shooting video content displayed by a display device by using a shooting device (such as a mobile phone and a camera), taking the mobile phone as an example, bright and dark band interference is caused because the backlight modulation frequency is not synchronous with the image refresh rate (image refresh rate), and obvious bright and dark band interference can be seen on the display device because the shutter frequency and the frequency refresh rate of the shooting device such as the mobile phone are faster than those of human eyes.
The embodiment of the application sets up the refresh rate of display module assembly through the frame rate of video signal and the minimum refresh rate and the maximum refresh rate of display module assembly of display device, and adjust backlight pulse width modulation frequency according to the screen refresh rate of shooting equipment and the refresh rate of display module assembly, make the backlight pulse width modulation frequency of display module assembly after the adjustment be the screen refresh rate of shooting equipment and the N times of the refresh rate of display module assembly, N is greater than or equal to 10 and is the integral multiple of 10, thereby improved backlight pulse width modulation frequency and with the refresh rate phase-match of display module assembly (for example keep synchronous), thereby can reduce the bright and dark area interference of shooting the image, and then improve the quality of information transfer.
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Fig. 3 schematically illustrates a functional structure of the display device 200 according to an exemplary embodiment. As shown in fig. 3, the device includes an obtaining module 301, a refresh rate determining module 302, and a duty ratio determining module 303.
An obtaining module 301 configured to obtain a frame rate of a video signal;
a refresh rate determining module 302 configured to determine whether the frame rate of the video signal is greater than or equal to the minimum refresh rate of the display module and less than or equal to the maximum refresh rate of the display module, if so, set the refresh rate of the display module to be equal to the frame rate of the video signal, otherwise, set the refresh rate of the display module to be equal to a preset refresh rate;
the backlight pulse width modulation frequency determining module 303 is configured to determine a minimum common multiple of a refresh rate of the display module and a preset screen refresh rate of the shooting device; and setting the backlight pulse width modulation frequency according to the N times of the least common multiple, so that the backlight frequency of the display module is equal to the N times of the least common multiple, wherein N is greater than 10 and is an integral multiple of 10, the screen refresh rate of the shooting equipment can be obtained according to a preset screen refresh rate list, and the screen refresh rate list comprises at least one screen refresh rate of the shooting equipment.
Fig. 4 is a schematic flowchart illustrating a setting method of a display device according to an embodiment of the present application. The process can be executed by the display device shown in fig. 3, and the refresh rate and the backlight pulse width frequency of the display module are dynamically set. The process can be realized by a software mode, and can also be realized by a mode of combining software and hardware. As shown, the process includes the following steps:
s401: the frame rate of the video signal is acquired.
In this step, a communication interface (such as an HDMI interface, a VGA interface, a DVI interface, an SDI interface, etc.) of the display device is connected to an external device, and when the display device detects that a video signal is accessed to the communication interface, a frame rate of the video signal is obtained.
In some embodiments of the present application, when a communication interface of an external device and a display device is switched, a frame rate of a video signal may also be acquired. For example, when the slave signal is switched from the HDMI interface to the VGA interface, the frame rate of the video signal accessed by the VGA interface is obtained.
In some embodiments of the present application, a user may transmit a control instruction for instructing to change a format of a video signal to the display apparatus 200 by operating the control device 100 or the mobile terminal 300a, and the display apparatus 200 acquires a frame rate of the video signal according to the control instruction. For example, the user operates the control device 100 to send a control instruction to the display device, and the display device 200 switches the video signal from the high-definition format to the standard-definition format according to the control instruction, and then obtains the frame rate of the video signal in the standard-definition format.
S402: judging whether the frame rate of the video signal is greater than or equal to the minimum refresh rate of the display module and less than or equal to the maximum refresh rate of the display module, if so, executing step S403, otherwise, executing step S404.
In the implementation of the application, the driving mode of the display module can be selected according to the frame rate of the video signal and the minimum refresh rate and the maximum refresh rate of the display module. If the frame rate of the video signal is larger than or equal to the minimum refresh rate of the display module and smaller than or equal to the maximum refresh rate of the display module, a frame-lock mode can be adopted, otherwise, a free-run mode is adopted.
In the frame-lock mode, the refresh rate of the display module is equal to the frame rate of the video signal, and the frame rate of the video signal and the refresh rate of the display module can be considered simultaneously in the mode, so that the refresh rate of the display module and the frame rate of the video signal are kept synchronous. In the Free-run mode, the refresh rate of the display module is equal to the preset refresh rate no matter what the frame rate of the video signal is.
S403: and setting the refresh rate of the display module to be equal to the frame rate of the video signal.
In the step, the frame-lock mode is adopted to set the refresh rate of the display module to be equal to the frame rate of the video signals, so that the video signals with various frame rates can be considered, and the interference of bright and dark bands of shot images is reduced.
S404: and setting the refresh rate of the display module to be equal to the preset refresh rate.
In the step, a free-run mode is adopted to set the refresh rate of the display module to be equal to a preset refresh rate, and the minimum refresh rate and the maximum refresh rate of the display module are limited by hardware conditions, so that the preset refresh rate is greater than or equal to the minimum refresh rate of the display module and less than or equal to the maximum refresh rate of the display module. For example, when the frame rate of the video signal is lower than 53Hz, the refresh rate of the display module is set to 50Hz, and when the frame rate of the video signal is not lower than 53Hz, the refresh rate of the display module is set to 60 Hz.
S405: and setting the backlight pulse width modulation frequency of the display module according to the refresh rate of the display module and the preset screen refresh rate of the shooting equipment.
In this step, the numerical value of the backlight pulse width modulation frequency is obtained by calculation. Specifically, the least common multiple of the refresh rate of the display module and the screen refresh rate of the shooting device is determined, and the backlight pulse width modulation frequency is set according to the least common multiple, so that the backlight pulse width frequency of the display module is equal to N times of the least common multiple, and N is greater than or equal to 10 and is an integral multiple of 10.
The user can capture images displayed by the display device through a capture device (such as a mobile phone, a camera, a tablet computer, etc.). The screen refresh rate of the shooting device can be obtained from a screen refresh rate list of the shooting device, and the screen refresh rate list of the shooting device can be stored in the display device in advance, or can be stored in other devices (such as a server) and sent to the display device by the other devices. The screen refresh rate list includes a screen refresh rate of at least one photographing device. When the minimum common multiple is calculated, the refresh rate of the display module and the minimum common multiple of the screen refresh rates of all shooting devices in the screen refresh rate list can be determined, so that the display device can be compatible with bright and dark band interference generated when different shooting devices shoot.
In the above embodiment of the present application, according to the frame rate of the obtained video signal and the minimum refresh rate and the maximum refresh rate of the display module, the refresh rate of the display module is set, and the backlight pulse width modulation frequency is set according to the preset screen refresh rate of the shooting device and the preset refresh rate of the display module, so that the backlight pulse width modulation frequency of the display module is equal to N times of the least common multiple of the screen refresh rate of the shooting device and the refresh rate of the display module, thereby improving the backlight pulse width modulation frequency and matching (for example, keeping synchronization) with the refresh rate of the display module, thereby reducing interference of bright and dark bands of the shot image, and further improving the quality of information transmission.
In another embodiment of the present application, the backlight frequency of the display module may be preset to be N times of a least common multiple of the video signal frame frequency and the screen refresh rate of the at least one photographing device, and the set backlight pulse width frequency is written into the display device in a software manner, thereby simplifying the setting operation of the display device.
The embodiment of the present application further provides a computer-readable storage medium, where computer-executable instructions are stored, and the computer-executable instructions are used to enable a computer to execute the method in the foregoing embodiment.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A display device setting method, comprising:
acquiring a frame rate of a video signal;
if the frame rate of the video signal is greater than or equal to the minimum refresh rate of the display module and less than or equal to the maximum refresh rate of the display module, setting the refresh rate of the display module to be equal to the frame rate of the video signal, otherwise, setting the refresh rate of the display module to be equal to a preset refresh rate;
and setting the backlight pulse width modulation frequency of the display module according to the refresh rate of the display module and the preset screen refresh rate of the shooting equipment.
2. The method as claimed in claim 1, wherein setting the backlight pulse width modulation frequency of the display module according to the refresh rate of the display module and the preset screen refresh rate of the photographing apparatus comprises:
determining the minimum common multiple of the refresh rate of the display module and the screen refresh rate of the shooting equipment;
and setting the backlight pulse width modulation frequency according to the N times of the least common multiple, so that the backlight pulse width modulation frequency of the display module is equal to the N times of the least common multiple, and N is greater than or equal to 10 and is an integral multiple of 10.
3. The method of claim 2, wherein determining the least common multiple of the refresh rate of the display module and the screen refresh rate of the capture device comprises:
acquiring a preset screen refresh rate list of the shooting equipment, wherein the screen refresh rate list comprises at least one screen refresh rate of the shooting equipment;
and determining the refresh rate of the display module and the minimum common multiple of the screen refresh rates of all the shooting devices in the screen refresh rate list.
4. The method of claim 1, wherein obtaining a frame rate of the video signal comprises:
when it is detected that the communication interface is accessed by the video signal, acquiring a frame rate of the accessed video signal, or
Receiving an instruction for switching the video signal format, switching the video signal format according to the instruction, and acquiring the frame rate of the switched video signal.
5. A display device, comprising:
an acquisition module configured to acquire a frame rate of a video signal;
the refresh rate determining module is configured to judge whether the frame rate of the video signal is greater than or equal to the minimum refresh rate of a display module and less than or equal to the maximum refresh rate of the display module, if so, the refresh rate of the display module is set to be equal to the frame rate of the video signal, otherwise, the refresh rate of the display module is set to be equal to a preset refresh rate;
and the backlight pulse width modulation frequency determining module is configured to set the backlight pulse width modulation frequency of the display module according to the refresh rate of the display module and the preset screen refresh rate of the shooting equipment.
6. The display device of claim 5, wherein the backlight pulse width modulation frequency determination module is configured to:
determining the minimum common multiple of the refresh rate of the display module and the screen refresh rate of the shooting equipment;
and setting the backlight pulse width modulation frequency according to the N of the least common multiple, so that the backlight pulse width modulation frequency of the display module is equal to the N of the least common multiple, and the N is greater than or equal to 10 and is an integral multiple of 10.
7. The display device of claim 6, wherein the backlight pulse width modulation frequency determination module is configured to:
acquiring a preset screen refresh rate list of the shooting equipment, wherein the screen refresh rate list comprises at least one screen refresh rate of the shooting equipment;
and determining the refresh rate of the display module and the minimum common multiple of the screen refresh rates of all the shooting devices in the screen refresh rate list.
8. The display device of claim 5, wherein the acquisition module is configured to:
when it is detected that the communication interface is accessed by the video signal, acquiring a frame rate of the accessed video signal, or
Receiving an instruction for switching the video signal format, switching the video signal format according to the instruction, and acquiring the frame rate of the switched video signal.
9. A display device, comprising a display, a memory, a controller, a communication interface:
the display is connected with the controller and is configured to display video signals;
the memory, coupled to the controller, configured to store computer instructions;
the communication interface is connected with the controller and used for receiving and sending data under the control of the controller;
the controller configured to perform the following operations in accordance with the computer instructions:
acquiring a frame rate of a video signal;
if the frame rate of the video signal is greater than or equal to the minimum refresh rate of the display module and less than or equal to the maximum refresh rate of the display module, setting the refresh rate of the display module to be equal to the frame rate of the video signal, otherwise, setting the refresh rate of the display module to be equal to a preset refresh rate;
and setting the backlight pulse width modulation frequency of the display module according to the refresh rate of the display module and the preset screen refresh rate of the shooting equipment.
10. A display device, comprising: drive assembly, video processor, display module assembly:
the driving component is configured to drive a display video signal;
the video processor is configured to process the video signal according to a standard coding and decoding protocol of the video signal;
the display module is configured to display the video signal processed by the video processor, the backlight pulse width modulation frequency of the display module is configured to be N times of the least common multiple of the video signal frame frequency and the screen refresh rate of the at least one shooting device, and N is greater than or equal to 10 and is an integral multiple of 10.
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