CN113114964A

CN113114964A - HDMI (high-definition multimedia interface) control method and display equipment

Info

Publication number: CN113114964A
Application number: CN202110560435.1A
Authority: CN
Inventors: 张大伟
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-07-13

Abstract

The invention discloses an HDMI (high-definition multimedia interface) control method and display equipment, wherein when an HDMI interface is detected to be accessed into external equipment, the equipment type of the external equipment is detected; and if the device type is detected to be audio playing equipment, switching the EDID of the HDMI into a preset version. This application can make the information in the accurate discernment of external audio playback equipment and the analytic EDID, guarantees that audio playback equipment can play effectual, the sound that accords with the output volume setting to solve the noiseless problem that leads to because of the EDID of the unable compatible high version of outside audio playback equipment.

Description

HDMI (high-definition multimedia interface) control method and display equipment

Technical Field

The invention relates to the field of display equipment, in particular to an HDMI (high-definition multimedia interface) control method and display equipment.

Background

The display device may be provided with an HDMI (High Definition Multimedia Interface) for connecting with an external device, such as an external set-top box, a DVD, and an audio playing device. Each HDMI interface stores corresponding EDID (Extended Display Identification Data), the external device accesses the Display device through the HDMI interface, reads the EDID corresponding to the HDMI interface, outputs TMDS (Transition-Minimized Differential Signaling) according to information such as image resolution, audio format, audio channel and the like supported by the Display device defined in the EDID, and plays the TMDS signal after the Display device identifies the TMDS signal through the HDMI interface.

Currently, HDMI can support EDID of different versions, for example, EDID1.4 version corresponds to a common display mode that is currently used, and EDID2.0 and above correspond to an enhanced display mode. In some application scenarios, for external audio playing devices, many of them only support low-version EDID1.4, and are incompatible with higher-version EDID, and therefore, the relevant information in the EDID cannot be correctly identified and analyzed, resulting in a silent abnormal situation of the audio playing device.

Disclosure of Invention

The invention provides an HDMI (high-definition multimedia interface) control method and display equipment, which aim to solve the problem of silence caused by the fact that external audio playing equipment cannot be compatible with EDID (extended display identification data) of a high version.

A first aspect provides a display device comprising:

the HDMI is used for connecting external equipment;

a controller for performing:

when the HDMI interface is detected to be connected to external equipment, detecting the equipment type of the external equipment;

and if the device type is detected to be audio playing equipment, switching the EDID of the HDMI into a preset version.

In some embodiments, after detecting that the device type is an audio playback device, the controller is further configured to: detecting a current version of the EDID; and if the current version of the EDID is the preset version, not switching the version of the EDID.

In some embodiments, the controller is further configured to perform: and if the device type is detected to be video signal source equipment, not switching the EDID version.

In some embodiments, the controller is configured to detect the device type of the external device as follows: receiving broadcast information sent by the external equipment, wherein the broadcast information comprises a logical address of the external equipment; and determining the equipment type of the external equipment according to the logical address.

The HDMI interface control method provided by the second aspect includes:

In the technical scheme provided by the application, when detecting that the HDMI interface inserts external equipment, detect external equipment's equipment type at first, and whether need switch over the EDID version of HDMI interface based on the equipment type is confirmed, when detecting that audio playback equipment is connected to the HDMI interface, make the EDID version of HDMI interface be the version of predetermineeing, predetermine the basic version that the version is for predetermined external audio playback equipment support, for example for EDID1.4, thereby make external audio playback equipment can accurately discern and resolve the information in the EDID, guarantee that audio playback equipment can play effectual, accord with the sound that the output volume set up, thereby solve because of the unable compatible high version EDID of external audio playback equipment and the noiseless problem that leads to.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be accessed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

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

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

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

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

fig. 5 is a flowchart illustrating an HDMI interface control method.

Detailed Description

To make the purpose and embodiments of the present application clearer, the following will clearly and completely describe the exemplary embodiments of the present application with reference to the attached 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, and not all of the embodiments.

It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.

The terms "first," "second," "third," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between similar or analogous objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.

The terms "comprises" and "comprising," 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 expressly 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 and/or software code that is capable of performing the functionality associated with that element.

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

In some embodiments, the control apparatus 100 may be a remote controller, and the communication between the remote controller and the display device includes at least one of an infrared protocol communication or a bluetooth protocol communication, and other short-distance communication methods, and controls the display device 200 in a wireless or wired manner. 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 of a mobile terminal, a tablet, a computer, a laptop, an AR/VR device, and the like.

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 program running on the 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 be controlled in a manner other than the control apparatus 100 and the smart device 300, for example, the voice instruction control of the user may be directly received by a module configured inside the display device 200 to obtain a voice instruction, or may be received by a voice control apparatus provided outside the display device 200.

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

In some embodiments, software steps executed by one step execution agent may be migrated on demand to another step execution agent in data communication therewith for execution. Illustratively, software steps performed by the server may be migrated to be performed on a display device in data communication therewith, and vice versa, as desired.

Fig. 2 exemplarily shows a block diagram of a configuration of the control apparatus 100 according to 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 from a user and convert the operation instruction into an instruction recognizable and responsive by the display device 200, serving as an interaction intermediary between the user and the display device 200.

In some embodiments, the communication interface 130 is used for external communication, and includes 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, a key, or an alternative module.

Fig. 3 shows a hardware configuration block diagram of the display apparatus 200 according to an exemplary embodiment.

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

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

In some embodiments, the display 260 includes a display screen component for displaying pictures, and a driving component for driving image display, a component for receiving image signals from the controller output, displaying video content, image content, and 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 tuner demodulator 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, and other network communication protocol chips or near field communication protocol chips, 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 collecting ambient light intensity; alternatively, the detector 230 includes an image collector, such as a camera, which may be used to collect external environment scenes, attributes of the user, or user interaction gestures, or the detector 230 includes a sound collector, such as a microphone, 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, and the like. The interface may be a composite input/output interface formed by the plurality of interfaces.

In some embodiments, the controller 250 and the modem 210 may be located in different separate devices, that is, the modem 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box.

In some embodiments, the controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. The controller 250 controls 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 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 actionable control. The operations related to the selected object are: displaying an operation connected to a hyperlink page, document, image, or the like, or performing an operation of a program corresponding to the icon.

In some embodiments the controller comprises at least one of a Central Processing Unit (CPU), a video processor, an audio processor, a Graphics Processing Unit (GPU), a RAM Random Access Memory (RAM), a ROM (Read-Only Memory), a first to nth interface 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 receiving external input, so as to finally display and play various audio-video contents. The CPU processor may include a plurality of processors. E.g. comprising a main processor and one or more sub-processors.

In some embodiments, a graphics processor for generating various graphics objects, such as: at least one of an icon, an operation menu, and a user input instruction display figure. The graphic processor comprises an arithmetic unit, which performs operation by receiving various interactive instructions input by a user and displays various objects according to display attributes; the system 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, and perform at least one of video processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, and image synthesis according to a standard codec protocol of the input signal, so as to obtain a signal displayed or played on the direct display device 200.

In some embodiments, the video processor includes at least one of a demultiplexing module, a video decoding module, an image composition 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 video signal after demultiplexing, including decoding, scaling and the like. And the image synthesis module is used for carrying out superposition mixing processing on the GUI signal input by the user or generated by the user and the video image after the zooming processing by the graphic generator so as to generate an image signal for display. 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 video output signal after the frame rate conversion, and changing the signal to be in accordance with the signal of the display format, such as an output RGB data signal.

In some embodiments, the audio processor 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 at least one of noise reduction, digital-to-analog conversion, and amplification processing to obtain a sound signal that can be played in the speaker.

In some embodiments, a user may enter user commands on a Graphical User Interface (GUI) displayed on display 260, and the user input interface receives the user input commands 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.

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

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

In some embodiments, a system of a display device may include a Kernel (Kernel), a command parser (shell), a file system, and an application program. The kernel, shell, and file system together make up the basic operating system structure that allows users to manage files, run programs, and use the system. After power-on, the kernel is started, kernel space is activated, hardware is abstracted, hardware parameters are initialized, and virtual memory, a scheduler, signals and interprocess communication (IPC) are operated and maintained. And after the kernel is started, loading the Shell and the user application program. The application program is compiled into machine code after being started, and a process is formed.

Referring to fig. 4, in some embodiments, the system is divided into four layers, which are an Application (Applications) layer (abbreviated as "Application layer"), an Application Framework (Application Framework) layer (abbreviated as "Framework layer"), an Android runtime (Android runtime) and system library layer (abbreviated as "system runtime library layer"), and a kernel layer from top to bottom.

In some embodiments, at least one application program runs in the application program layer, and the application programs may be windows (windows) programs carried by an operating system, system setting programs, clock programs or the like; or 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 (API) and a programming framework for the application program of the application layer. The application framework layer includes a number of predefined functions. The application framework layer acts as a processing center that decides to let the applications in the application layer act. The application program can access the resources in the system and obtain the services of the system in execution through the API interface.

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

In some embodiments, the activity manager is used to manage the lifecycle of the various applications as well as general navigational fallback functions, such as controlling exit, opening, fallback, etc. of the applications. The window manager is used for managing all window programs, such as obtaining the size of a display screen, judging whether a status bar exists, locking the screen, intercepting the screen, controlling the change of the display window (for example, reducing the display window, displaying a shake, displaying a distortion deformation, and the like), and the like.

In some embodiments, the system runtime layer provides support for the upper layer, i.e., the framework layer, and when the framework layer is used, the android operating system runs the C/C + + library included in the system runtime layer to implement the functions to be implemented by the framework layer.

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

The above embodiments describe the hardware/software architecture and functional implementation of the display device. In some application scenarios, the display device may be provided with a plurality of HDMI interfaces, and connect to external devices through the HDMI interfaces, where the external devices include, but are not limited to, a set-top box, a DVD, and an Audio playback device, where the Audio playback device includes an external power amplifier supporting an ARC (Audio Return Channel) function.

The HDMI supports a CEC (Consumer Electronics Control) communication protocol, provides a high-level Control function for all external devices accessing the HDMI interface in an application scene, namely, a user can control the devices connected in the CEC system through a remote controller, all the audio and video signal source devices in the CEC system are directly or indirectly connected to a root device, the display devices are connected into a top-down tree through HDMI, the display device is used as a root node of the tree, the signal switch device is used as a branch node of the tree, each external device accessed through HDMI is used as a leaf node of the tree, each device in the CEC system is provided with a physical address, the CEC can conveniently address and control the device with a specific physical address, the display device of the root node detects the number of the devices connected through HDMI currently, and physical addresses are allocated to these devices in the EDID, which is also one of the factors causing the external power amplifier devices to be silent.

For example, after the external power amplifier 1 is inserted into the HDMI1 interface of the display device, EDID data of the HDMI1 interface is read, and the physical address allocated to the external power amplifier 1 is analyzed from the EDID data. Due to the continuous upgrade of the EDID version, the existing external device may not follow up the latest EDID version, or cannot support the latest EDID version, or the external device is not updated in time, if the EDID version supported by the external power amplifier 1 is lower than the current EDID version of the HDMI1, for example, the external power amplifier 1 supports EDID1.4, and the HDMI1 interface is EDID2.1, the external power amplifier 1 cannot be compatible with the EDID2.1 version, and an accurate physical address cannot be obtained by analysis after reading the data in the EDID2.1, and then a report is made that the physical address is wrong, and the external power amplifier 1 has a silent problem.

In order to solve the problem of silence caused by the fact that external audio playing equipment cannot be compatible with EDID of a high version, the application provides an HDMI interface control method, which aims to determine whether the EDID version needs to be switched according to the type of equipment connected to an HDMI interface, so that the EDID version is suitable for the capacity of the external audio equipment, EDID data can be accurately analyzed, and effective sound which accords with output volume setting is output.

In some embodiments, when the display device detects that the HDMI interface is connected to the external device, the device type of the external device is detected, and if the device type is an audio playback device, the current EDID version of the HDMI interface is a preset version, where the preset version is a basic version that is generally supported by the external audio playback device, for example, the preset version is EDID 1.4.

In some embodiments, after detecting that the device type is an audio playback device, the current version of EDID of the HDMI interface is further detected. And if the current version of the EDID is higher than the preset version, switching the EDID of the HDMI into the preset version. For example, if the preset version is EDID1.4 and the current version of EDID of the HDMI interface is EDID2.0, which indicates that a silence problem may be caused due to a low version of the audio playback device, the HDMI interface is controlled to switch the EDID version from EDID2.0 to EDID 1.4.

In some embodiments, after the device type is detected as the audio playing device, if the current version of the EDID is detected as the preset version, the version of the EDID does not need to be switched, that is, the EDID keeps the preset version unchanged.

In some embodiments, if it is detected that the device type is not an audio playing device, such as a video source device, the EDID version may not need to be switched, that is, the current version of the EDID is maintained regardless of whether the current version of the EDID is a preset version or higher than the preset version.

In some embodiments, the HDMI interface control method as shown in fig. 5, the execution subject of the method is a controller 250, and the method includes the following program steps:

step S10, when detecting that the HDMI interface is connected to an external device, detects a device type of the external device.

In some embodiments, each device connected to the CEC control bus is provided with a unique logical address, which also corresponds to a unique identifier of the device, so that the device type of the external device can be identified from the logical address.

Optionally, the display device may maintain a device logical address list, where a corresponding relationship between each device connected to the CEC control bus and its logical address is recorded in the list, and after obtaining the logical address of the external device, the display device may query the corresponding device from the list according to the logical address, so as to obtain the specific device type. Table 1 below illustrates an example of a device logical address list.

TABLE 1

In one exemplary implementation, in the example of table 1, the logical address of the display device of the root node is set to 0 by default. After a certain device a accesses the HDMI interface, since the device type of the device a is known, a logical address may be preset for the device a, for example, a DVD is used as the playback device 1, the logical address is preset to 4, and the logical address of the device a is broadcasted through a < Polling Message >; if the logical address set for the device a is already occupied by the device B, the device B will respond to the confirmation information, after receiving the confirmation information, the device a resets the logical address and broadcasts the < Polling Message > until there is no device response confirmation information, the currently set logical address is available, so that the device a occupies the logical address, and the corresponding relationship between the device a and the occupied logical address is inserted in the device logical address list. After occupying a certain logical Address, the device a sends < Report Physical Address > broadcast information, which may include the Physical Address and logical Address of the device a, to broadcast the occupation of the logical Address. If the set logical addresses are occupied by other devices after traversing inquiry, the logical address of the device a is set to 15.

In some embodiments, when the external device is plugged into the HDMI interface, the external device may send broadcast information, where the broadcast information includes a logical address of the external device, and the device type may be located by the logical address. For example, if the obtained logical address of the external device is 5, the device logical address list is queried, and if the device corresponding to the logical address 5 is an audio playing device, the device will be used as a target object of the adjustable EDID version.

Step S20, determine whether the device type is an audio playing device. If yes, go to step S30, otherwise go to step S60.

In step S30, the current version of EDID of the HDMI interface is detected. The current version of EDID is generally not lower than the preset version.

And step S40, judging whether the current version of the EDID is a preset version. If the version is higher than the preset version, go to step S50; if the version is the preset version, step S60 is executed.

And step S50, switching the EDID of the HDMI interface to a preset version.

And step S60, not switching the EDID version, and keeping the current version of the EDID unchanged.

According to the technical scheme, when the HDMI is detected to be connected into the external device, the device type of the external device is detected, whether the EDID version of the HDMI needs to be switched is determined based on the device type, when the audio playing device is detected to be connected to the HDMI, the EDID version of the HDMI is a preset version, and the preset version is a basic version supported by the preset external audio playing device, such as EDID1.4, so that the external audio playing device can accurately identify and analyze information in the EDID, the audio playing device can be guaranteed to play effective sound conforming to output volume setting, and the problem of silence caused by the fact that the external audio playing device cannot be compatible with the EDID of a high version is solved. If the device type is video signal source equipment or the device type is audio playing equipment but the current version of the EDID is a preset version, the EDID version does not need to be switched, namely the current version of the EDID is kept unchanged, and the normal playing of the audio signals and the video signals can still be ensured in the state. In practical application, the adaptive processing logic can be automatically executed according to the type of the equipment accessed to the HDMI and the current EDID version of the HDMI, the compatibility problem of the external equipment aiming at the EDID of the enhanced version above 2.0 is solved, the audio playing data can be ensured to normally output sound, the EDID version does not need to be manually adjusted by a user, and the user experience is improved.

Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. In a specific implementation, the invention also provides a computer storage medium, which can store a program. When the computer storage medium is located in the display apparatus 200, the program may include some or all of the steps involved in the aforementioned HDMI interface control method that the controller 250 is configured to perform when executed. The computer storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM) or a Random Access Memory (RAM).

Like parts between the display apparatus embodiments and the method embodiments in this description may be referred to one another. In addition, the relevant contents such as HDMI, CEC, EDID, ARC and the like related in the present application may refer to the prior art adaptively, and the relevant contents are not described again.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A display device, comprising:

the HDMI is used for connecting external equipment;

a controller for performing:

2. The display device according to claim 1, wherein after detecting that the device type is an audio playing device, the controller is further configured to perform:

detecting a current version of the EDID;

and if the current version of the EDID is the preset version, not switching the version of the EDID.

3. The display device according to claim 1, wherein the controller is further configured to perform:

and if the device type is detected to be video signal source equipment, not switching the EDID version.

4. The display device according to claim 1, wherein the controller is configured to detect the device type of the external device as follows:

receiving broadcast information sent by the external equipment, wherein the broadcast information comprises a logical address of the external equipment;

and determining the equipment type of the external equipment according to the logical address.

5. An HDMI interface control method in a display device, comprising:

6. The method of claim 5, wherein after detecting that the device type is an audio playback device, the method further comprises:

detecting a current version of the EDID;

7. The method of claim 5, further comprising:

8. The method of claim 5, wherein the detecting the device type of the external device comprises: