CN116339660A

CN116339660A - Display equipment and EDID version switching method

Info

Publication number: CN116339660A
Application number: CN202111600198.3A
Authority: CN
Inventors: 曹圆圆; 鲍富成
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: 2023-06-27

Abstract

The application shows a display device and a method for switching EDID version. Wherein the display device includes: a display; an external device interface for accessing external equipment; a controller configured to: receiving a verification instruction of high-bandwidth digital content protection sent by external equipment; when the verification is successful, a high-bandwidth digital content protection version is obtained; determining an EDID version of the external equipment according to the high-bandwidth digital content protection version; and switching the EDID version of the display device according to the EDID version of the external device. According to the technical scheme, the optimal performance of the output of the display device and the compatibility of the external device can be considered, and the EDID version can be adaptively switched.

Description

Display equipment and EDID version switching method

Technical Field

The application relates to the technical field of display equipment, in particular to display equipment and an EDID version switching method.

Background

The extended display identification data (Extended display identification data, EDID) is a standard data format of the video electronics standards association (Video Electronics Standards Association, VESA) that includes parameters relating to the display and its capabilities, including but not limited to: vendor information, maximum image size, color settings, vendor presets, limits of frequency ranges, display name and serial number.

In the process that the display device is connected to the external device, the version matching problem of the EDID is related, the EDID in the existing high-definition multimedia interface (High Definition Multimedia Interface, HDMI) has two versions of 1.4 and 2.0, and in the process that the external device identifies and matches the EDID version of the display device, the following problems may exist: when the EDID version of the external device is the EDID 1.4 version, if the EDID version set by the display device in default is the EDID 2.0 version, the external device in the EDID 1.4 version cannot identify the EDID of the display device 2.0 version; resulting in no output signal from the external device. When the EDID version of the external device is the EDID 2.0 version, if the EDID version of the display device is set to the EDID 1.4 version by default, the EDID version of the external device may be downward compatible to identify the EDID 1.4 version of the display device; in essence, the external device can output better image quality, but the output capability is reduced due to the EDID version of the display device, so that the display device and the external device cannot exert optimal performance.

Disclosure of Invention

The application provides display equipment and an EDID version switching method, which can give consideration to the optimal performance of the output of the display equipment and the compatibility of external equipment so as to adaptively switch the EDID version.

In a first aspect, the present application shows a display device comprising: a display; an external device interface for accessing external equipment; a controller configured to: receiving a verification instruction of high-bandwidth digital content protection sent by external equipment; when the verification is successful, a high-bandwidth digital content protection version is obtained; determining an EDID version of the external equipment according to the high-bandwidth digital content protection version; and switching the EDID version of the display device according to the EDID version of the external device. By adopting the embodiment of the application, the highest supported EDID version of the external device can be determined through the high-bandwidth digital content protection version, so that the display device is preferentially switched to the EDID of the version, and the optimal performance of the output of the display device and the compatibility of the external device can be considered, so that the EDID version can be adaptively switched.

In some embodiments, the step of receiving a high bandwidth digital protection check instruction sent by the external device is further configured to: when the display equipment and the external equipment are powered on simultaneously, a verification instruction of high-bandwidth digital content protection sent by the external equipment is received; when a checking instruction is received, a high-bandwidth digital content protection checking key preset by the display equipment is sent to external equipment; and when the external equipment reads the verification key, determining that the display equipment and the external equipment are successfully verified. By adopting the embodiment, the verification can be initiated under the condition that the display equipment and the external equipment are electrified at the same time, and the verification can be ensured under various conditions.

In some embodiments, the step of receiving a high bandwidth digital protection check instruction sent by the external device is further configured to: after the display equipment is powered on, if the external equipment is powered on again or hot plugged, a verification instruction of high-bandwidth digital content protection sent by the external equipment is received; when a checking instruction is received, a high-bandwidth digital content protection checking key preset by the display equipment is sent to external equipment; and when the external equipment reads the verification key, determining that the display equipment and the external equipment are successfully verified. By adopting the embodiment, the verification can be initiated under the condition that the external equipment is powered on or hot plugged, and the stability of the verification under the scene can be ensured.

In some embodiments, the controller performs the step of obtaining a high bandwidth digital content protection version, and is further configured to: a 1.4 version of the high bandwidth digital content protection is obtained or a 2.2 version of the high bandwidth digital content protection is obtained. By adopting the embodiment, different versions of high-bandwidth digital content protection can be obtained through verification, and the EDID version of the corresponding external device can be further judged.

In some embodiments, the EDID version of the external device includes: EDID1.4 version and EDID2.0 version; the controller performs the step of determining the EDID version of the external device from the high bandwidth digital content protection version, and is further configured to: when the high-bandwidth digital content protection is 1.4 version, determining that the EDID version of the external equipment is 1.4 version of EDID; when the high-bandwidth digital content protection is 2.2 versions, the EDID version of the external device is determined to be the EDID2.0 version. By adopting the embodiment, the version of the EDID of the external equipment is judged according to the version of the high-bandwidth digital content protection, so that the version of the EDID of the display equipment can be automatically switched.

In some embodiments, the controller performs the step of switching the EDID version of the display device according to the EDID version of the external device, and is further configured to: judging whether a user manually sets the EDID version of the display device; if the user manually sets the EDID version of the display device, switching according to the EDID version of the display device manually set by the user; and if the EDID version of the display device is not manually set by the user, automatically switching the EDID version of the display device into the EDID version matched with the external device. By adopting the embodiment, the authority of manually setting the EDID version is reserved for the user, and the reliability of manual setting is better than that of automatic identification.

In some embodiments, the EDID version of the display device includes: EDID 1.4 version and EDID 2.0 version; the controller is further configured to: when the user manually sets the EDID version of the display device, controlling the display to display an EDID version selection interface; the EDID version selection interface includes: an automatic control, an EDID 1.4 version control and an EDID 2.0 version control; when a user clicks an automatic control to set the EDID version of the display device, automatically switching the EDID version of the display device into an EDID version matched with the EDID version of the external device; when a user clicks the EDID 1.4 version control, switching the EDID version of the display device according to the EDID 1.4 version of the display device manually set by the user; when the user clicks the EDID 2.0 version control, the EDID version of the display device is switched according to the EDID 2.0 version of the display device manually set by the user. With the adoption of the embodiment, an automatic control is additionally arranged on the EDID version selection interface of the display device so as to execute the function of automatically switching the EDID version of the display device.

In some embodiments, the controller is further configured to: after the EDID version of the display device is automatically switched to the EDID version matched with the EDID version of the external device, if the EDID version of the display device is manually set by a user, judging whether the version of the display device manually set by the user is the same as the EDID version of the display device which is automatically switched; if the EDID version of the display device manually set by the user is the same as the EDID version of the display device which has been automatically switched, no switching operation is performed. By adopting the embodiment, the action of switching the EDID can be reduced, and because the hot plug pin needs to be pulled up when the EDID of the display device takes effect, more time is consumed.

In some embodiments, the controller is further configured to: when the verification is unsuccessful, switching the EDID version of the display device according to the default setting; the default settings include: compatibility priority and optimal output priority; when the default setting is the priority of compatibility, switching the EDID version of the display equipment to the EDID 1.4 version according to the default setting; and when the default setting is the optimal output priority, switching the EDID version of the display device to the EDID 2.0 version according to the default setting. By adopting the embodiment, when the external equipment does not have the high-bandwidth digital content protection function and cannot initiate verification or fails verification, the empty EDID cannot occur, so that if the default setting is prioritized by compatibility, the EDID 1.4 version is selected; the EDID version 2.0 is selected with the optimal output priority.

In a second aspect, the present application further shows a method for switching EDID versions, the method including: receiving a verification instruction of high-bandwidth digital content protection sent by external equipment; when the verification is successful, a high-bandwidth digital content protection version is obtained; determining an EDID version of the display device according to the high-bandwidth digital content protection version; and switching the EDID version of the external equipment after determining the EDID version of the display equipment. By adopting the embodiment of the application, the highest supported EDID version of the external device can be determined through the high-bandwidth digital content protection version, so that the display device is preferentially switched to the EDID of the version, and the optimal performance of the output of the display device and the compatibility of the external device can be considered, so that the EDID version can be adaptively switched.

According to the technical scheme, the highest supported EDID version of the external device can be determined through the high-bandwidth digital content protection version, so that the display device is preferentially switched to the EDID of the version, and the optimal performance of the output of the display device and the compatibility of the external device can be considered, so that the EDID version can be adaptively switched.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 illustrates a usage scenario diagram of a display device according to some embodiments;

fig. 2 shows a hardware configuration block diagram of the control apparatus 100 according to some embodiments;

fig. 3 illustrates a hardware configuration block diagram of a display device 200 according to some embodiments;

FIG. 4 illustrates a software configuration diagram of a display device 200 according to some embodiments;

FIG. 5 illustrates a schematic view of a scenario in which a display device is connected to an external device, according to some embodiments;

fig. 6 illustrates an EDID version selection interface according to some embodiments;

FIG. 7 illustrates a display device configuration flow diagram in accordance with some embodiments;

FIG. 8 illustrates a check flow diagram when a display device and an external device are powered on simultaneously, according to some embodiments;

FIG. 9 illustrates another display device and external device verification flow diagram in accordance with some embodiments;

fig. 10 illustrates an EDID version selection interface according to some embodiments;

fig. 11 illustrates a flow diagram for switching a display device from an automatic control to an EDID version 2.0 control in accordance with some embodiments;

fig. 12 illustrates a flow diagram for switching a display device from an automatic control to an EDID version 1.4 control in accordance with some embodiments;

fig. 13 illustrates a flow diagram of a display device switching from an EDID version 2.0 control to an automatic control in accordance with some embodiments;

Fig. 14 illustrates a flow diagram for a display device to switch from an EDID version 1.4 control to an automatic control, in accordance with some embodiments.

Detailed Description

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

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-described figures are used for distinguishing between similar or similar objects or entities and not necessarily for limiting a particular order or sequence, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.

The terms "comprises," "comprising," and "having," 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 all elements explicitly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

The term "module" refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware or/and software code that is capable of performing the function associated with that element.

Reference throughout this specification to "multiple embodiments," "some embodiments," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in at least one other embodiment," or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic shown or described in connection with one embodiment may be combined, in whole or in part, with features, structures, or characteristics of one or more other embodiments without limitation. Such modifications and variations are intended to be included within the scope of the present application.

Fig. 1 schematically illustrates a use scenario of a display device according to an exemplary embodiment. As shown in fig. 1, the display device 200 is also in data communication with a server 400, and a user can operate the display device 200 through the smart device 300 or the control apparatus 100.

In some embodiments, the control apparatus 100 may be a remote controller, and the communication between the remote controller and the display device includes at least one of infrared protocol communication or bluetooth protocol communication, and other short-range communication modes, and the display device 200 is controlled by a wireless or wired mode. The user may control the display apparatus 200 by inputting a user instruction through at least one of a key on a remote controller, a voice input, a control panel input, and the like.

In some embodiments, the smart device 300 may include any one of a mobile terminal, tablet, computer, notebook, AR/VR device, etc.

In some embodiments, the smart device 300 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.

In some embodiments, the smart device 300 and the display device may also be used for communication of data.

In some embodiments, the display device 200 may also perform control in a manner other than the control apparatus 100 and the smart device 300, for example, the voice command control of the user may be directly received through a module configured inside the display device 200 device for acquiring voice commands, or the voice command control of the user may be received through a voice control apparatus configured outside the display device 200 device.

In some embodiments, the display device 200 is also in data communication with a server 400. 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. The server 400 may be a cluster, or may be multiple clusters, and may include one or more types of servers.

In some embodiments, software steps performed by one step execution body may migrate on demand to be performed on another step execution body in data communication therewith. For example, software steps executed by the server may migrate to be executed on demand on a display device in data communication therewith, and vice versa.

Fig. 2 exemplarily shows a block diagram of a configuration of the control apparatus 100 in accordance with an exemplary embodiment. As shown in fig. 2, the control device 100 includes a controller 110, a communication interface 130, a user input/output interface 140, a memory, and a power supply. The control apparatus 100 may receive an input operation instruction of a user, and convert the operation instruction into an instruction recognizable and responsive to the display device 200, and may perform an interaction between the user and the display device 200.

In some embodiments, the communication interface 130 is configured to communicate with the outside, including at least one of a WIFI chip, a bluetooth module, NFC, or an alternative module.

In some embodiments, the user input/output interface 140 includes at least one of a microphone, a touchpad, a sensor, keys, or an alternative module.

Fig. 3 shows a hardware configuration block diagram of the display device 200 in accordance with an exemplary embodiment.

In some embodiments, display apparatus 200 includes at least one of a modem 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, memory, a power supply, a user interface.

In some embodiments the controller comprises a central processor, a video processor, an audio processor, a graphics processor, RAM, ROM, a first interface for input/output to an nth interface.

In some embodiments, the display 260 includes a display screen component for presenting a picture, and a driving component for driving an image display, for receiving an image signal from the controller output, for displaying video content, image content, and components of a menu manipulation interface, and a user manipulation UI interface, etc.

In some embodiments, the display 260 may be at least one of a liquid crystal display, an OLED display, and a projection display, and may also be a projection device and a projection screen.

In some embodiments, the modem 210 receives broadcast television signals via wired or wireless reception and demodulates audio-video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.

In some embodiments, communicator 220 is a component for communicating with external devices or servers according to various communication protocol types. For example: the communicator may include at least one of a Wifi module, a bluetooth module, a wired ethernet module, or other network communication protocol chip or a near field communication protocol chip, and an infrared receiver. The display apparatus 200 may establish transmission and reception of control signals and data signals with the control device 100 or the server 400 through the communicator 220.

In some embodiments, the detector 230 is used to collect signals of the external environment or interaction with the outside. For example, detector 230 includes a light receiver, a sensor for capturing the intensity of ambient light; alternatively, the detector 230 includes an image collector such as a camera, which may be used to collect external environmental scenes, user attributes, or user interaction gestures, or alternatively, the detector 230 includes a sound collector such as a microphone, or the like, which is used to receive external sounds.

In some embodiments, the external device interface 240 may include, but is not limited to, the following: high Definition Multimedia Interface (HDMI), analog or data high definition component input interface (component), composite video input interface (CVBS), USB input interface (USB), RGB port, etc. The input/output interface may be a composite input/output interface formed by a plurality of interfaces.

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 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 controls the overall operation of the display apparatus 200. For example: in response to receiving a user command to select a UI object to be displayed on the display 260, the controller 250 may perform an operation related to the object selected by the user command.

In some embodiments, the object may be any one of selectable objects, such as a hyperlink, an icon, or other operable control. The operations related to the selected object are: 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.

In some embodiments the controller includes at least one of a central processing unit (Central Processing Unit, CPU), video processor, audio processor, graphics processor (Graphics Processing Unit, GPU), RAM Random Access Memory, RAM), ROM (Read-Only Memory, ROM), first to nth interfaces for input/output, a communication Bus (Bus), and the like.

A CPU processor. For executing operating system and application program instructions stored in the 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. The CPU processor may include a plurality of processors. Such as one main processor and one or more sub-processors.

In some embodiments, a graphics processor is used to generate various graphical objects, such as: at least one of icons, operation menus, and user input instruction display graphics. The graphic processor comprises an arithmetic unit, which is used for receiving various interactive instructions input by a user to operate and displaying various objects according to display attributes; the device also comprises a renderer for rendering various objects obtained based on the arithmetic unit, wherein the rendered objects are used for being displayed on a display.

In some embodiments, the video processor is configured to receive an external video signal, perform at least one of decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, image composition, and the like according to a standard codec protocol of an input signal, and obtain a signal that is displayed or played on the directly displayable device 200.

In some embodiments, the video processor includes at least one of 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 and video data stream. And the video decoding module is used for processing the demultiplexed video signal, 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. And the frame rate conversion module is used for converting the frame rate of the input video. And the display formatting module is used for converting the received frame rate into a video output signal and changing the video output signal to be in accordance with a display format, such as outputting RGB data signals.

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

In some embodiments, a user may input a user command through a Graphical User Interface (GUI) displayed on the display 260, 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, a window, a control, etc. displayed in a display screen of the electronic device, where the control may include at least one of a visual interface element such as an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a Widget, etc.

In some embodiments, the user interface 280 is an interface (e.g., physical keys on a display device body, or the like) that may be used to receive control inputs.

In some embodiments, a system of display devices may include a Kernel (Kernel), a command parser (shell), a file system, and an application program. The kernel, shell, and file system together form the basic operating system architecture that allows users to manage files, run programs, and use the system. After power-up, the kernel is started, the kernel space is activated, hardware is abstracted, hardware parameters are initialized, virtual memory, a scheduler, signal and inter-process communication (IPC) are operated and maintained. After the kernel is started, shell and user application programs are loaded again. The application program is compiled into machine code after being started to form a process.

Referring to FIG. 4, in some embodiments, the system is divided into four layers, from top to bottom, an application layer (referred to as an "application layer"), an application framework layer (Application Framework layer) (referred to as a "framework layer"), a An Zhuoyun row (Android run) and a system library layer (referred to as a "system runtime layer"), and a kernel layer, respectively.

In some embodiments, at least one application program is running in the application program layer, and these application programs may be a Window (Window) program of an operating system, a system setting program, a clock program, or the like; or may be an application developed by a third party developer. In particular implementations, the application packages in the application layer are not limited to the above examples.

The framework layer provides an application programming interface (application programming interface, API) and programming framework for the application. The application framework layer includes a number of predefined functions. The application framework layer corresponds to a processing center that decides to let the applications in the application layer act. Through the API interface, the application program can access the resources in the system and acquire the services of the system in the execution.

As shown in fig. 4, the application framework layer in the embodiment of the present application includes a manager (manager), a Content Provider (Content Provider), and the like, where the manager includes at least one of the following modules: an Activity Manager (Activity Manager) is used to interact with all activities that are running in the system; a Location Manager (Location Manager) is used to provide system services or applications with access to system Location services; a Package Manager (Package Manager) for retrieving various information about an application Package currently installed on the device; a notification manager (Notification Manager) for controlling the display and clearing of notification messages; a Window Manager (Window Manager) is used to manage bracketing icons, windows, toolbars, wallpaper, and desktop components on the user interface.

In some embodiments, the activity manager is used to manage the lifecycle of the individual applications as well as the usual navigation rollback functions, such as controlling the exit, opening, fallback, etc. of the applications. The window manager is used for managing all window programs, such as obtaining the size of the display screen, judging whether a status bar exists or not, locking the screen, intercepting the screen, controlling the change of the display window (for example, reducing the display window to display, dithering display, distorting display, etc.), etc.

In some embodiments, the system runtime layer provides support for the upper layer, the framework layer, and when the framework layer is in use, the android operating system runs the C/C++ libraries contained in the system runtime layer to implement the functions to be implemented by the framework layer.

In some embodiments, the kernel layer is a layer between hardware and software. As shown in fig. 4, the kernel layer contains at least one of the following drivers: audio drive, display drive, bluetooth drive, camera drive, WIFI drive, USB drive, HDMI drive, sensor drive (e.g., fingerprint sensor, temperature sensor, pressure sensor, etc.), and power supply drive, etc.

The EDID in the existing high-definition multimedia interface (High Definition Multimedia Interface, HDMI) has two versions, namely 1.4 and 2.0, and HDMI 2.0 can support the transmission efficiency of 340Mcsc relative to 1.4, that is, the EDID version of 2.0 can support the resolution of more than 4k, including 3840×2160p60 hz, 3840×2160p 50hz, 4096×2160p60 hz, 4096×2160p 50hz and 4096×2160p30 hz. HDMI 2.0 does not define new data lines and connectors, interfaces, and therefore can remain downward compatible with HDMI low versions.

It should be noted that HDMI 2.0 enhances support for resolutions above 4k relative to HDMI 1.4, and improves a plurality of video and audio technologies to which it is applied; whereas HDMI 1.4 can only support up to 4k 60hz in YUV420 color format at a bandwidth of 10.2 Gbps; although HDMI 1.4 can support a resolution of 4k, image quality suffers from a loss due to an excessively high image color compression.

Further, HDMI 1.4 can support 4k resolution, but is limited by bandwidth up to 3840×2160p30fps; HDMI 2.0 expands bandwidth to 18Gfps, and can support 3840×2160p 50fps, 3840×2160p60fps; while supporting a maximum of 32 channels in audio and a sample rate of 1536kHz at the highest.

Fig. 5 shows a schematic view of a scenario in which a display device is connected to an external device. The external device is a collective name of an input device, an output device and an external memory in the display device, plays roles of transmitting, transferring and storing data and information, and is an important component of the display device. An external device refers to any device other than the display device host. The external device is an accessory or auxiliary device connected with the display device, and can expand the display device system. When a part of external equipment (such as a television box/DVD player) is accessed to the display equipment through an external device interface of the display equipment, the EDID version of the display equipment is identified and matched,

the existing HDMI technology has been developed to the HDMI 2.1 version, which can support the signal transmission with 8k resolution and 120Hz high frame rate, and the EDID version corresponding to the existing HDMI version is updated from the EDID 1.4 version to the EDID 2.0 version; however, the existing display device is difficult to be fully compatible with the difference of the EDID versions, and in order to cope with the update of the EDID versions, the existing display device is often configured with two versions of EDID in the factory process, and provides the user with an EDID version selection interface as shown in fig. 6 for the user to manually switch.

Because the user may not know the specific setting mode of the EDID, the default setting of the display device is very important, and the existing default setting includes two setting modes of the EDID version of the default display device, namely the EDID1.4 version and the EDID version of the default display device, and in the process of identifying and matching the EDID version of the display device by using a part of external equipment, taking a television box as an example, the following problems may exist:

when the version of the EDID of the television box is the version of EDID1.4, if the version of the EDID set by default of the display device is the version of EDID2.0, the television box of the version of EDID1.4 cannot identify the version of EDID of the display device 2.0; resulting in no output signal from the television box.

When the EDID version of the television box is the EDID2.0 version, if the EDID version of the display device is set to the EDID1.4 version by default, the EDID version of the television box may be downward compatible to identify the EDID1.4 version of the display device; in essence, the external device can output better image quality, but the output capability is reduced due to the EDID version of the display device, so that the display device and the external device cannot exert optimal performance.

It should be noted that, the television box is an intelligent multimedia terminal, and can connect the display device and the internet, and the display device can connect the internet through the television box to watch the internet television program. The television box is provided with HDMI, which is configured with EDID and can adopt HDCP technology. The technical solutions presented in this application include, but are not limited to, being applicable to such television boxes.

In order to solve the above problems, the application shows a display device and a method for switching an EDID version, which can consider the optimal performance of the output of the display device and the compatibility of an external device so as to adaptively switch the EDID version.

Fig. 7 shows a flow chart of a display device configuration according to an exemplary embodiment, and the present application shows a display device including: a display; an external device interface for accessing external equipment; a controller configured to perform step S701 to step S704 shown in fig. 7:

step S701, a verification instruction of high-bandwidth digital content protection sent by the external equipment is received;

high-bandwidth digital content protection (HDCP) is a technique for protecting uncompressed digital audio-video content, and does not allow copying behavior at all from a content source device to a display device. When a user illegally copies a high definition signal, the HDCP technology may interfere, and the quality of the copied image is reduced, thereby protecting the content. HDCP includes: check protocols, pixel encryption, and updatability. In a specific implementation, first, the transmitter verifies whether the receiving device is authorized to receive the encrypted data, and verifies the validity of the data information received by the receiver through a verification protocol. The sender and the receiving device exchange a 40-bit Key Selection Vector (KSV), the receiving and transmitting sides respectively and independently calculate the obtained KSV and the private key, the calculation results are compared, and if the two values are equal, the sending end can be used for receiving the receiver bit HDCP of the receiver bit. In the technical scheme shown in the application, the external device is used as a sender to initiate a verification instruction of high-bandwidth digital content protection to the display device.

Fig. 8 illustrates a verification flow chart when a display device and an external device are powered on simultaneously in accordance with an exemplary embodiment. As shown in fig. 8, in some embodiments, the step of the controller executing the check instruction of the high bandwidth digital protection sent by the external device is further configured to:

when the display equipment and the external equipment are powered on simultaneously, a verification instruction of high-bandwidth digital content protection sent by the external equipment is received;

when a checking instruction is received, a high-bandwidth digital content protection checking key preset by the display equipment is sent to external equipment;

and when the external equipment reads the verification key, determining that the display equipment and the external equipment are successfully verified.

Fig. 9 illustrates a verification flow chart when the external device is powered on or hot plugged after the display device is powered on according to an exemplary embodiment. As shown in fig. 9, in some embodiments, the step of the controller executing the check instruction of the high bandwidth digital protection sent by the external device is further configured to:

after the display equipment is powered on, if the external equipment is powered on again or hot plugged, a verification instruction of high-bandwidth digital content protection sent by the external equipment is received;

It should be noted that hot plug, i.e. hot plug, refers to that a module and a board card are inserted into or pulled out of a system without affecting the normal operation of the system under the condition that the power supply of the system is not turned off, so that the reliability, the quick maintainability, the redundancy, the timely recovery capability to disasters and the like of the system are improved. For a high-power modularized power system, the hot plug technology can replace a power module with a fault under the condition of maintaining the voltage of the whole power system, and ensure that other power modules in the modularized power system normally operate. In the technical scheme shown in the application, the external device performs hot plug under the condition that the display device is powered on and operates, the verification of the HDCP is not affected, and the HDCP can perform stable verification under various conditions.

It should be further noted that, the preset high-bandwidth digital content protection verification key of the display device is embedded in the HDMI interface of the display device, and the display device supporting HDCP needs to support the function in hardware, interface and software. In general, the display device with the HDMI interface supports the HDCP protocol, but the display device with the DVI interface does not necessarily support the HDCP protocol, and the display device with the DVI interface can pass through the display device with the corresponding hardware chip and pass through the authentication.

In some embodiments, the display device has a case where HDCP is not supported, where HDCP verification may not be possible or failed, based on which the controller is further configured to:

when the verification is unsuccessful, switching the EDID version of the external equipment according to default settings; the default settings include: compatibility priority and optimal output priority;

when the default setting is that compatibility is priority, switching the EDID version of the external equipment to an EDID 1.4 version according to the default setting;

and when the default setting is the optimal output priority, switching the EDID version of the external equipment to the EDID 2.0 version according to the default setting.

It should be noted that, the default setting is factory setting of the display device, and according to the purpose setting that the manufacturer provides services for the user, if the external device is not configured with the HDCP and cannot perform HDCP verification, the EDID version of the display device needs to be configured through the default setting.

Step S702, when the verification is successful, the high-bandwidth digital content protection version is obtained;

in some embodiments, the controller performs the step of obtaining a high bandwidth digital content protection version, and is further configured to:

a 1.4 version of the high bandwidth digital content protection is obtained or a 2.2 version of the high bandwidth digital content protection is obtained.

In the specific implementation, the external device preferentially selects the highest version for verification in the process of initiating verification on the high-broadband digital content of the display device.

Step S703, determining an EDID version of the external device according to the high bandwidth digital content protection version;

in some embodiments, the EDID version of the external device includes: EDID 1.4 version and EDID2.0 version; the controller performs the step of determining the EDID version of the external device from the high bandwidth digital content protection version, and is further configured to:

when the high-bandwidth digital content protection is 1.4 version, determining that the EDID version of the external equipment is 1.4 version of EDID;

when the high-bandwidth digital content protection is 2.2 versions, the EDID version of the external device is determined to be the EDID2.0 version.

In a specific implementation, when the external device accesses the display device through the HDMI interface, i.e. initiates HDCP verification on the display device, since the 1.4 version of HDCP and the 2.2 version of HDCP correspond to the EDID version of the external device respectively, the highest version of the HDCP checked according to the external device may default the corresponding EDID version to the highest EDID version supported by the external device.

Step S704, switching the EDID version of the display device according to the EDID version of the external device.

In some embodiments, the controller performs the step of switching the EDID version of the display device according to the EDID version of the external device, and is further configured to:

judging whether a user manually sets the EDID version of the display device;

if the user manually sets the EDID version of the display device, switching according to the EDID version of the display device manually set by the user;

and if the EDID version of the display device is not manually set by the user, automatically switching the EDID version of the display device into the EDID version matched with the external device.

In a specific implementation, when the user gives up the function of automatically switching the EDID version and manually sets the EDID version of the display device, the EDID version of the display device manually set by the user is preferentially followed, and the subjective intention of the user is prioritized. When the EDID version of the external device is the EDID 2.0 version, the EDID version of the display device can be switched to the EDID 2.0 version according to the EDID version of the external device. However, if the user manually sets the EDID version of the display device to EDID1.4 version, the EDID version of the display device is switched to 1.4 version.

In some embodiments, the controller, when performing switching according to the EDID version of the display device manually set by the user, is further configured to:

Judging whether the EDID version of the display device manually set by the user is an EDID version matched with the external device;

if the EDID version of the display device manually set by the user is the EDID version matched with the external device, switching according to the EDID version of the display device manually set by the user;

and if the EDID version of the display device manually set by the user is not the EDID version matched with the external device, controlling the display to display a first prompt, wherein the first prompt is used for prompting the EDID version of the display device manually set by the user to be matched with the fishing external device.

In some embodiments, the EDID version of the display device includes: EDID 1.4 version and EDID 2.0 version; the controller is further configured to: fig. 10 illustrates an EDID version selection interface illustrated in an exemplary embodiment of the present application, and as illustrated in fig. 10, when a user manually sets an EDID version of the display device, the display is controlled to display the EDID version selection interface; the EDID version selection interface includes: an automatic control, an EDID 1.4 version control and an EDID 2.0 version control;

when a user clicks the automatic control to set the EDID version of the display device, automatically switching the EDID version of the display device into an EDID version matched with the EDID version of the external device;

When a user clicks the EDID1.4 version control, switching the EDID version of the display device according to the EDID1.4 version of the display device manually set by the user;

and when the user clicks the EDID2.0 version control, switching the EDID version of the display device according to the EDID2.0 version of the display device manually set by the user.

The existing EDID version selection interface only includes: the technical scheme disclosed by the application adds an automatic control to facilitate UI interaction between a user and display equipment, and in specific implementation, the automatic control is set by default to execute the technical scheme disclosed by the application.

In some embodiments, the controller is further configured to:

after the EDID version of the external equipment is automatically switched to the EDID version matched with the EDID version of the display equipment, if the EDID version of the display equipment is manually set by a user, judging whether the version of the display equipment manually set by the user is the same as the EDID version of the external equipment;

if the EDID version of the display device manually set by the user is the same as the EDID version of the external device, the switching operation is not executed.

It should be noted that, whether the EDID version of the display device is manually set by the user or not, the version number of the display device matched with the external device is recorded in the process of initiating HDCP verification by the external device, so as to avoid the lack of the EDID version number as a reference when the user switches to the automatic control.

In a specific implementation, when the user switches among a plurality of controls on the EDID version selection interface, the following cases are included:

fig. 11 shows a schematic flow diagram of a display device switching from an automatic control to an EDID version 2.0 control according to an example embodiment; as shown in fig. 11, when the user switches from the automatic control to the EDID2.0 version control, if the automatic control recognizes that the EDID version of the display device matching the external device is the EDID2.0 version, the switching operation is not performed, and if the automatic control recognizes that the EDID version of the display device matching the external device is the EDID1.4 version, the EDID version of the display device is switched to the EDID2.0 version.

Fig. 12 shows a schematic flow diagram of a display device switching from an automatic control to an EDID version 1.4 control according to an example embodiment; as shown in fig. 12, when the user switches from the automatic control to the EDID1.4 version control, if the automatic control recognizes that the EDID version of the display device matching the external device is the EDID1.4 version, the switching operation is not performed, and if the automatic control recognizes that the EDID version of the display device matching the external device is the EDID2.0 version, the EDID version of the display device is switched to the EDID2.0 version.

Fig. 13 shows a schematic flow diagram of a display device switching from an EDID version 2.0 control to an automatic control according to an example embodiment; as shown in fig. 13, when the user switches from the EDID 2.0 version control to the automatic control, if the HDCP of the recorded display device is the HDCP 2.2 version, the switching operation is not performed; if the recorded HDCP of the display device is the 1.4 version of the HDCP, the EDID version of the display device is switched from the 2.0 version of the EDID to the 1.4 version of the EDID.

Fig. 14 shows a schematic flow diagram of a display device switching from an EDID version 1.4 control to an automatic control according to an example embodiment; as shown in fig. 14, when the user switches from the EDID version 1.4 control to the automatic control, if the HDCP of the recorded display device is the HDCP version 1.4, the switching operation is not performed; if the recorded HDCP of the display device is the HDCP 2.0 version, the EDID version of the display device is switched from the EDID1.4 version to the EDID 2.0 version.

The application also shows a method for switching the version of the EDID, which comprises the following steps:

receiving a verification instruction of high-bandwidth digital content protection sent by external equipment; when the verification is successful, a high-bandwidth digital content protection version is obtained; determining an EDID version of the external equipment according to the high-bandwidth digital content protection version; and switching the EDID version of the display device according to the EDID version of the external device. By adopting the embodiment of the application, the highest supported EDID version of the external device can be determined through the high-bandwidth digital content protection version, so that the display device is preferentially switched to the EDID of the version, and the optimal performance of the output of the display device and the compatibility of the external device can be considered, so that the EDID version can be adaptively switched.

In some embodiments, receiving a high bandwidth digital protection verification instruction sent by an external device includes: when the display equipment and the external equipment are powered on simultaneously, a verification instruction of high-bandwidth digital content protection sent by the external equipment is received; when a checking instruction is received, a high-bandwidth digital content protection checking key preset by the display equipment is sent to external equipment; and when the external equipment reads the verification key, determining that the display equipment and the external equipment are successfully verified. By adopting the embodiment, the verification can be initiated under the condition that the display equipment and the external equipment are electrified at the same time, and the verification can be ensured under various conditions.

In some embodiments, receiving a high bandwidth digital protection verification instruction sent by an external device includes: after the display equipment is powered on, if the external equipment is powered on again or hot plugged, a verification instruction of high-bandwidth digital content protection sent by the external equipment is received; when a checking instruction is received, a high-bandwidth digital content protection checking key preset by the display equipment is sent to external equipment; and when the external equipment reads the verification key, determining that the display equipment and the external equipment are successfully verified. By adopting the embodiment, the verification can be initiated under the condition that the external equipment is powered on or hot plugged, and the stability of the verification under the scene can be ensured.

In some embodiments, obtaining a high bandwidth digital content protection version includes: a 1.4 version of the high bandwidth digital content protection is obtained or a 2.2 version of the high bandwidth digital content protection is obtained. By adopting the embodiment, different versions of high-bandwidth digital content protection can be obtained through verification, and the EDID version of the corresponding external device can be further judged.

In some embodiments, the EDID version of the external device includes: EDID1.4 version and EDID2.0 version; determining the EDID version of the external device according to the high-bandwidth digital content protection version comprises the following steps: when the high-bandwidth digital content protection is 1.4 version, determining that the EDID version of the external equipment is 1.4 version of EDID; when the high-bandwidth digital content protection is 2.2 versions, the EDID version of the external device is determined to be the EDID2.0 version. By adopting the embodiment, the version of the EDID of the external equipment is judged according to the version of the high-bandwidth digital content protection, so that the version of the EDID of the display equipment can be automatically switched.

In some embodiments, switching the EDID version of the display device according to the EDID version of the external device includes: judging whether a user manually sets the EDID version of the display device; if the user manually sets the EDID version of the display device, switching according to the EDID version of the display device manually set by the user; and if the EDID version of the display device is not manually set by the user, automatically switching the EDID version of the display device into the EDID version matched with the external device. By adopting the embodiment, the authority of manually setting the EDID version is reserved for the user, and the reliability of manual setting is better than that of automatic identification.

In some embodiments, the EDID version of the display device includes: EDID 1.4 version and EDID 2.0 version; the method further comprises the steps of: when the user manually sets the EDID version of the display device, controlling the display to display an EDID version selection interface; the EDID version selection interface includes: an automatic control, an EDID 1.4 version control and an EDID 2.0 version control; when a user clicks an automatic control to set the EDID version of the display device, automatically switching the EDID version of the display device into an EDID version matched with the EDID version of the external device; when a user clicks the EDID 1.4 version control, switching the EDID version of the display device according to the EDID 1.4 version of the display device manually set by the user; when the user clicks the EDID 2.0 version control, the EDID version of the display device is switched according to the EDID 2.0 version of the display device manually set by the user. With the adoption of the embodiment, an automatic control is additionally arranged on the EDID version selection interface of the display device so as to execute the function of automatically switching the EDID version of the display device.

In some embodiments, the method further comprises: after the EDID version of the display device is automatically switched to the EDID version matched with the EDID version of the external device, if the EDID version of the display device is manually set by a user, judging whether the version of the display device manually set by the user is the same as the EDID version of the display device which is automatically switched; if the EDID version of the display device manually set by the user is the same as the EDID version of the display device which has been automatically switched, no switching operation is performed. By adopting the embodiment, the action of switching the EDID can be reduced, and because the hot plug pin needs to be pulled up when the EDID of the display device takes effect, more time is consumed.

In some embodiments, the method further comprises: when the verification is unsuccessful, switching the EDID version of the display device according to the default setting; the default settings include: compatibility priority and optimal output priority; when the default setting is the priority of compatibility, switching the EDID version of the display equipment to the EDID 1.4 version according to the default setting; and when the default setting is the optimal output priority, switching the EDID version of the display device to the EDID 2.0 version according to the default setting. By adopting the embodiment, when the external equipment does not have the high-bandwidth digital content protection function and cannot initiate verification or fails verification, the empty EDID cannot occur, so that if the default setting is prioritized by compatibility, the EDID 1.4 version is selected; the EDID version 2.0 is selected with the optimal output priority.

It should be understood that, the specific implementation manner of each step in the above method for switching EDID versions may refer to the foregoing display device embodiment, which is not described herein. According to the technical scheme, the verification instruction of high-bandwidth digital content protection sent by external equipment is received; when the verification is successful, a high-bandwidth digital content protection version is obtained; determining an EDID version of the external equipment according to the high-bandwidth digital content protection version; and switching the EDID version of the display device according to the EDID version of the external device. According to the technical scheme, the optimal performance of the output of the display device and the compatibility of the external device can be considered, and the EDID version can be adaptively switched.

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;

an external device interface for accessing external equipment;

A controller configured to:

receiving a verification instruction of high-bandwidth digital content protection sent by the external equipment;

when the verification is successful, the high-bandwidth digital content protection version is obtained;

determining an EDID version of the external equipment according to the high-bandwidth digital content protection version;

and switching the EDID version of the display device according to the EDID version of the external device.

2. The display device of claim 1, wherein the controller executing the step of receiving a high bandwidth digital protection check instruction sent by the external device is further configured to:

when the checking instruction is received, a high-bandwidth digital content protection checking key preset by the display equipment is sent to the external equipment;

3. The display device of claim 1, wherein the controller executing the step of receiving a high bandwidth digital protection check instruction sent by the external device is further configured to:

After the display equipment is powered on, if the external equipment is powered on again or hot plugged, receiving a verification instruction of high-bandwidth digital content protection sent by the external equipment;

4. The display device of claim 1, wherein the controller performing the step of obtaining the high bandwidth digital content protection version is further configured to:

and acquiring a 1.4 version of the high-bandwidth digital content protection or acquiring a 2.2 version of the high-bandwidth digital content protection.

5. The display device of claim 4, wherein the EDID version of the external device comprises: EDID1.4 version and EDID 2.0 version;

the controller performs the step of determining the EDID version of the external device from the high bandwidth digital content protection version, and is further configured to:

And when the high-bandwidth digital content protection is 2.2 versions, determining that the EDID version of the external equipment is the EDID2.0 version.

6. The display device of claim 1, wherein the controller performs the step of switching the EDID version of the display device according to the EDID version of the external device, and is further configured to:

judging whether a user manually sets the EDID version of the display device;

if the EDID version of the display device is manually set by the user, switching is performed according to the EDID version of the display device manually set by the user;

7. The display device of claim 6, wherein the EDID version of the display device comprises: EDID 1.4 version and EDID2.0 version;

the controller is further configured to:

when the user manually sets the EDID version of the display device, controlling the display to display an EDID version selection interface; the EDID version selection interface includes: an automatic control, an EDID 1.4 version control and an EDID2.0 version control;

when a user clicks the EDID 1.4 version control, switching the EDID version of the display device according to the EDID 1.4 version of the display device manually set by the user;

and when the user clicks the EDID 2.0 version control, switching the EDID version of the display device according to the EDID 2.0 version of the display device manually set by the user.

8. The display device of claim 6, wherein the controller is further configured to:

after the EDID version of the display device is automatically switched to the EDID version matched with the EDID version of the external device, if the EDID version of the display device is manually set by a user, judging whether the version of the display device manually set by the user is the same as the EDID version of the display device which is automatically switched;

if the EDID version of the display device manually set by the user is the same as the EDID version of the display device which has been automatically switched, no switching operation is performed.

9. The display device of claim 1, wherein the controller is further configured to:

when the verification is unsuccessful, switching the EDID version of the display equipment according to default settings; the default settings include: compatibility priority and optimal output priority;

when the default setting is the compatibility priority, switching the EDID version of the display equipment to the EDID 1.4 version according to the default setting;

and when the default setting is the optimal output priority, switching the EDID version of the display equipment to the EDID 2.0 version according to the default setting.

10. A method for switching EDID versions, the method comprising:

receiving a verification instruction of high-bandwidth digital content protection sent by external equipment;