CN115334340A

CN115334340A - Display device and extended display identification data setting method

Info

Publication number: CN115334340A
Application number: CN202210939640.3A
Authority: CN
Inventors: 卢平光
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-11-11

Abstract

Some embodiments of the present application provide a display apparatus and an extended display identification data setting method. After detecting that the external device interface is connected with the external device, the display device can generate initial extended display identification data, generate extended information based on the physical resolution of the display, and combine the extended information and the initial extended display identification data to obtain first extended display identification data. The display equipment sends an instruction for reading the first extended display identification data to the external equipment, and obtains data reading result information of the external equipment. And acquiring target extended display identification data based on the data reading result information, and determining the target extended display identification data as extended display identification data of the display device. After the initial extended display identification data is extended, the upper limit of the maximum display resolution supported by the display equipment in the extended display identification data can be improved, so that the external equipment can output high-resolution media asset data, and the watching experience of a user is improved.

Description

Display device and extended display identification data setting method

Technical Field

The application relates to the technical field of display equipment, in particular to display equipment and an extended display identification data setting method.

Background

A user may view various media assets in a network using a display device. With the development of the display device, the display device can also be connected with a specific external device, receive and play media asset data sent by the external device, including video data and/or audio data, so that a user can control the external device through the display device.

In order to interact with the external device, extended Display Identification Data (EDID) is set in the display device. EDID is a standard data format of Video Electronics Standards Association (VESA) and contains some information of a display device, such as vendor information of the display device, supported display resolution, supported sound format, and sound channel, etc. The external device can read the EDID data to determine the characteristics supported by the display device. According to the EDID data, the external equipment can generate corresponding media asset data so as to send the media asset data to the display equipment for playing.

The external device can determine the display resolution supported by the display device through the EDID of the display device. However, in the related art, there is an upper limit to the display resolution that the EDID can declare, and when the maximum display resolution supported by the display device exceeds the upper limit, the display resolution obtained when the external device reads the EDID is the upper limit, and the display device cannot inform the external device of the maximum display resolution. The resolution ratio of the media asset data sent by the external equipment is smaller than the maximum display resolution ratio supported by the display equipment, so that the display equipment and the external equipment cannot give play to the optimal performance, and the experience of a user is poor.

Disclosure of Invention

Some embodiments of the present application provide a display apparatus and an extended display identification data setting method. The method and the device solve the problems that in the related art, the resolution of the media asset data sent by the external equipment is smaller than the maximum display resolution supported by the display equipment, so that the display equipment and the external equipment cannot give play to the optimal performance, and the user experience is poor.

In a first aspect, some embodiments of the present application provide a display apparatus including a display, an external device interface, and a controller. Wherein the external device interface is configured to connect to an external device; the controller is configured to perform the steps of:

generating initial extended display identification data after detecting that an external device interface is connected with external equipment, wherein the initial extended display identification data is used for representing that the display resolution supported and output by a display is smaller than or equal to the initial resolution;

generating extension information based on a physical resolution of a display, the physical resolution being greater than the initial resolution; combining the extended information and the initial extended display identification data to obtain first extended display identification data, wherein the first extended display identification data is used for representing that the display resolution supported by the display to be output is the physical resolution;

sending an instruction for reading the first extended display identification data to the external equipment, and acquiring data reading result information of the external equipment;

and acquiring target extended display identification data based on the data reading result information, and determining the target extended display identification data as extended display identification data of the display equipment.

In a second aspect, some embodiments of the present application provide an extended display identification data setting method, which is applied to a display device, and includes:

generating initial expansion display identification data after detecting that the external device interface is connected with the external equipment, the initial extended display identification data is used for representing that the display resolution of the display support output is less than or equal to the initial resolution;

According to the technical scheme, the display equipment and the extended display identification data setting method are provided in some embodiments of the application. After detecting that the external device interface is connected with the external device, the display device can generate initial extended display identification data, generate extended information based on the physical resolution of the display, and combine the extended information and the initial extended display identification data to obtain first extended display identification data. The display equipment sends an instruction for reading the first extended display identification data to the external equipment, and obtains data reading result information of the external equipment. And acquiring target extended display identification data based on the data reading result information, and determining the target extended display identification data as extended display identification data of the display device. After the initial extended display identification data is extended, the upper limit of the maximum display resolution supported by the display equipment in the extended display identification data can be improved, so that the external equipment can output high-resolution media data, and the watching experience of a user is improved.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.

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 schematic diagram illustrating the connection of a display device and an external device in some embodiments;

FIG. 6 is a diagram illustrating a first extension field in some embodiments;

FIG. 7 illustrates an interaction flow diagram for components of a display device in some embodiments;

FIG. 8 illustrates a software configuration diagram in display device 200 in some embodiments;

FIG. 9 illustrates a schematic diagram of a display setup interface in some embodiments;

FIG. 10 illustrates a flow diagram for checking high-bandwidth digital content protection in some embodiments;

FIG. 11 illustrates an EDID version switch interface in some embodiments;

FIG. 12 illustrates a flow diagram of an extended display identification data setup method in some embodiments.

Detailed Description

To make the objects, embodiments and advantages of the present application clearer, the following description of exemplary embodiments of the present application will clearly and completely describe the exemplary embodiments of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application, and it is to be understood that the described exemplary embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

All other embodiments, which can be derived by a person skilled in the art from the exemplary embodiments described herein without inventive step, are intended to be within the scope of the claims appended hereto. In addition, while the disclosure herein has been presented in terms of one or more exemplary examples, it should be appreciated that aspects of the disclosure may be implemented solely as a complete embodiment. 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 illustrates a usage scenario of a display device according to some embodiments, as shown in fig. 1, a user may operate the display device 200 through a mobile terminal 300 and a control apparatus 100. The control apparatus 100 may be a remote controller, and the communication between the remote controller and the display device includes infrared protocol communication, bluetooth protocol communication, wireless or other wired method to control the display device 200. The user may input a user command through a key on a remote controller, voice input, control panel input, etc. to control the display apparatus 200. In some embodiments, mobile terminals, tablets, computers, laptops, and other smart devices may also be used to control the display device 200.

In some embodiments, the mobile terminal 300 may install a software application with the display device 200 to implement connection communication through a network communication protocol for the purpose of one-to-one control operation and data communication. The audio and video contents displayed on the mobile terminal 300 can also be transmitted to the display device 200, so that the display device 200 with the synchronous display function can also perform data communication with the server 400 through multiple communication modes. 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 display device 200 may be a liquid crystal display, an OLED display, or a projection display device. The display apparatus 200 may additionally provide an intelligent network tv function that provides a computer support function in addition to the broadcast receiving tv function.

Fig. 2 illustrates a block diagram of a hardware configuration of the control apparatus 100 according to some embodiments. 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. The communication interface 130 is used for communicating with the outside, and includes at least one of a WIFI chip, a bluetooth module, NFC, or an alternative module. The user input/output interface 140 includes at least one of a microphone, a touch pad, a sensor, a key, or an alternative module.

Fig. 3 illustrates a hardware configuration block diagram of a display device 200 according to some embodiments. As shown in fig. 3, 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, and a user interface 280. The controller includes a central processor, a video processor, an audio processor, a graphic processor, a RAM, a ROM, and first to nth interfaces for input/output. The display 260 may be at least one of a liquid crystal display, an OLED display, a touch display, and a projection display, and may also be a projection device and a projection screen. The display is used for displaying a user interface. The user interface may be a specific target image, such as various media assets acquired from a network signal source, including video, pictures, and other content. The user interface may also be some UI interface of the display device. The user may view content such as assets in the display. The tuner demodulator 210 receives a broadcast television signal through a wired or wireless reception manner, and demodulates an audio/video signal, such as an EPG data signal, from a plurality of wireless or wired broadcast television signals. The detector 230 is used to collect signals of an external environment or interaction with the outside. The controller 250 and the tuner-demodulator 210 may be located in different separate devices, that is, the tuner-demodulator 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. A user may input a user command on 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 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 the user can receive. 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 a 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.

Fig. 4 illustrates a software configuration diagram in the display device 200 according to some embodiments, as shown in fig. 4, the system is divided into four layers, which are an Application (Application) 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 layer"), and a kernel layer, respectively, from top to bottom. The inner core layer comprises 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..

In some embodiments, the display device may be connected to the external device 500 so as to receive the related data transmitted by the external device 500. The display device may be connected to the external device 500 through an external device interface, and the external device 500 may be a computer host, a game device, a television box, an audio device, an image collector, or the like. In this embodiment, the connection of the display device and the external device 500 refers to establishing a communication connection, and the display device and the external device 500 establishing the communication connection are respectively used as a receiving end (Sink end) and a sending end (source end). The external device 500 may perform a data transmission process through the external device interface and the display device, and transmit media data and the like to the display device. For example, during the use of a game device by a user, it is possible to output video data and audio data in real time for the game process and transmit the video data and audio data to a display device to output the video data and audio data as video pictures and sounds through the display device. At this time, the game device serves as a transmitting side, and the display device serves as a receiving side.

The transmitting end and the receiving end can realize communication connection through a specific interface, so that data can be transmitted. For this purpose, data interfaces with the same interface specification and function should be provided on both the transmitting side and the receiving side. Fig. 5 shows a schematic diagram of the connection of the display device and the external device 500 in some embodiments. As shown in fig. 5, both the display device and the external device 500 are provided with an HDMI (High Definition Multimedia Interface). In the using process, a user can insert two ends of the HDMI interface data line into the display device and the external device 500 respectively, and after the external device 500 and the display device are started, set the signal source of the display device as the HDMI interface, thereby implementing data transmission between the display device and the external device 500.

It should be noted that, in order to implement the communication connection between the display device and the external device 500, other connection manners may also be adopted between the display device and the external device 500. The specific connection mode may be a wired connection mode, such as DVI (Digital Visual Interface), VGA (Video Graphics Array), USB (Universal Serial Bus), etc.; or a wireless connection mode, such as a wireless local area network, a bluetooth connection, an infrared connection, etc. Different information transfer protocols can be adopted for different communication connection modes, for example, when the connection is realized by adopting an HDMI interface, an HDMI transmission protocol can be adopted for data transmission.

In some embodiments, the display device may be connected to the external device 500, such as a computer host or a game device, through an HDMI interface. When the user uses the external device 500, the external device 500 may output video data and audio data by running the related program. The video data and the audio data may be transmitted to the display device through the HDMI protocol, and output through the display 260 and the speaker of the display device, so as to play the video and the audio of the external device 500. The external device 500 may perform data transmission based on a specific standard after the display device is connected, so that the display device and the external device 500 may perform mutual identification and establish a data transmission channel. For example, the Display device may establish a connection with the external device 500 based on Extended Display Identification Data (EDID) and implement mutual Identification. Extended display identification data is a standard data format of the Video Electronics Standards Association (VESA) that contains parameters about the display 260 and its capabilities, including but not limited to: vendor information, maximum image size, color settings, vendor presets, limits on frequency range, display 260 name, and string of serial numbers.

The external device 500 may perform data transmission based on a specific standard after the display device is connected, so that the display device and the external device 500 may establish a mutual identification and establish a data transmission channel. For example, the display device may be recognized by the external device 500 based on EDID.

After the connection relationship between the display device and the external device 500 is established, data transmission between the display device and the external device 500500 can be bidirectional, that is, the external device 500 can send media data and other data related to audio and video output to the display device; meanwhile, the display device may also send data to the external device 500, for example, send request data, feedback result data, and the like to the external device 500. Therefore, the display device and the external device 500 may not only transmit the media data to complete the playing process, but also transmit the control command to realize the interactive control.

In some embodiments, when it is detected that the external device interface is connected to the external device 500, the display apparatus may generate extended display identification data EDID for data interaction with the external device 500, and notify the external device 500 to read the EDID information. After the external device 500 reads the EDID information, corresponding media asset data may be generated and sent to the display device. It should be noted that, the EDID information mainly defines the image resolution, the supported sound format, the sound channel, the 3D information, and the like supported by the display device, and aims to inform the external device 500 of the characteristics supported by the display device, so that the external device 500 outputs the audio/video data supported by the display device according to the characteristics, otherwise, the audio/video data output by the external device 500 is not supported by the display device, and the display device cannot normally play the audio/video data.

In some embodiments, the display apparatus may generate the initial extended display identification data EDID first after detecting that the external device interface is connected to the external device 500. The initial extended display identification data in the embodiment of the present application includes two fields, namely a Base field Block and a first extended field CTA Block, each of which is 128 bytes.

In generating the initial extended display identification data EDID, the controller 250 may first acquire device information and video parameters of the display device. In the embodiments of the present application, the device information of the display device is referred to as first device information. The first device information includes data such as an ID and manufacturer information of the display device. The video parameters are related parameters when the display device plays a video, such as a display resolution, a color parameter, and the like that the display 260 supports outputting.

The controller 250 may generate the base field according to the first device information and the video parameter. The base field includes 128 bytes. Wherein, bytes 00H-07H represent the file header of the EDID data and are also the start flag of the basic field, and these 8 bytes are fixed and equal to 0x00 FFFFFFFFFFFFFF;

08H-09H byte, representing the manufacturer's ID or name;

0AH-0BH byte, representing product ID;

0CH-0FH byte, representing the serial number of the production line;

bytes 10H-11H, representing production time;

bytes 12H-13H, representing a version number, e.g. 1.3 is denoted 01, 03;

14H bytes, which represents the type of video input signal, whether it is digital or analog;

15H bytes, representing the maximum horizontal size;

16H bytes, representing the maximum vertical dimension;

17H bytes, representing the display transmission characteristics, i.e. displaying a version of Gamma, such as 2.20;

18 bytes, representing the HDPMS and supported attributes, such as the display type is RGB;

bytes 19H-22H, representing chrominance information;

23H bytes, representing the supported base timing Table 1, such as 640x480@60HZ (IBM, VGA), 800x600@60HZ (VESA);

24H bytes, representing supported basic timing Table 2, such as 1024x768@60HZ (VESA);

25H bytes, representing timing information reserved by the manufacturer;

bytes 26H-35H, which represents the supported standard timing table;

bytes 36H-47H, which represents timing detailed information description 1, and this segment is a more detailed description of timing, such as horizontal and vertical picture size, whether the refresh mode is interlaced or progressive, etc.;

bytes 48H-59H, which represents timing detail description 2;

5AH-6BH byte, representing timing detail description 3;

the 6CH-7DH byte represents the detailed information description 4 of the timing, these four segments are used to describe the detailed information of different timing, description 1 must have, others can be null;

7EH byte, which represents the flag bit of the extension part, if 0, the extension part does not exist, and if 1, the extension part also exists behind;

the 7FH byte, representing the CheckSum check bit, is used to check whether the data has been altered illegally or whether there is a transmission error, which is the end flag of the basic field.

In some embodiments, since the basic field is only 128 bytes and the information that can be stored is limited, some extension information may also be obtained and the first extension field may be generated according to the extension information.

The controller 250 may acquire mode information and audio parameters of the display device. Wherein the mode information refers to video and audio modes, such as analog or digital. The audio parameters are related parameters when the display device plays audio, and may include a sampling frequency of the audio, a sampling depth of the audio, format information of the audio, and the like. The controller 250 may also obtain some other extended information, such as manufacturer information, etc.

The controller 250 may generate the first extension field according to the mode information and the audio parameter.

Fig. 6 illustrates a schematic diagram of a first extension field in some embodiments. The first extension field, CTA Block, CTA original name CEA (American Consumer electronics Association), may be a CEA-861D extension Block.

As shown in fig. 6, the first extension field includes 128 bytes. The following extended information is included:

image and sound patterns, such as analog or digital. Color modes, such as YCbCr (4. A short timing description, here specifying some timing information that is not described within segment 1. For example, 640x480p @60HZ 4. Short descriptions of sound such as PCM (2-channel, 32KHZ,44.1HZ,48HZ,16bit,20bit, 24bit), AC-3, dolby Digital + (6-channel, 32KHZ,44.1KHZ,48KHZ, maximum bit rate 640 kbps), loudspeakers (left and right channels). VSDB: manufacturer specific information, such as CEC physical address, 3D information, deep color information, etc., is included. CheckSum check bit.

In some embodiments, controller 250 concatenates the first extension field after the base field, resulting in initial extension display identification data. The initial extension display identifies the field order in the data as the base field-the first extension field. Each field is 128 bytes, and therefore the initial extended display identification data is 256 bytes of data, which is abbreviated as 256 bytes EDID in the embodiment of the present application.

After acquiring the initial extended display identification data, the controller 250 may store the initial extended display identification data in a preset storage module, which may be a register RAM. Controller 250 may send an instruction to external device 500 to cause external device 500 to read the initial extended display identification data stored in the register. External device 500 may determine, based on the initial extended display identification data, information associated with the display device, including video parameters and audio parameters, such as the display resolution that display 260 supports the output. The external device 500 may generate corresponding media asset data, including audio and video data, according to the information, and send the media asset data to the display device. The display device may play the media asset data sent by the external device 500.

It should be noted that, since the initial expansion display identification data is 256 bytes, the information that can be stored therein is limited. For example, for the display resolution that the display 260 supports outputting, there is an upper limit to the display resolution that the initial extended display identification data can declare, the maximum resolution that the initial extended display identification data can declare is 3840 × 2160@, 120hz, and the upper limit to the resolution that the initial extended display identification data can declare in the embodiment of the present application is referred to as the initial resolution.

However, as display devices are developed, the display resolution supported by the display 260 for output is also increased, i.e., may exceed the initial resolution, for example, the display resolution supported by the display 260 may be 3840 × 2160@144hz, or even 3840 × 2160@165hz. Limited by the declarative ability to initially expand the display identification data, the display device cannot inform external device 500 of resolution conditions supported by display 260 that exceed the initial resolution. External device 500 may consider the maximum resolution supported by display 260 to be the initial resolution, resulting in generation of video data at or below the initial resolution when generating the asset data. At this time, the external device 500 may be capable of outputting video data with a higher resolution, but since the initial extended display identification data of the display device results in that the video data with the highest resolution can only be output, the output capability is reduced, so that both the display device and the external device 500 cannot exert the optimal performance. Accordingly, the controller 250 may adjust the initial extended display identification data so that it can declare a resolution condition supported by the display 260 that exceeds the initial resolution.

In some embodiments, the controller 250 may acquire the physical resolution of the display 260.

There will be a fixed physical resolution for the display 260. The physical resolution represents the maximum display resolution that the display 260 is capable of outputting. For example, for a display 260 with a resolution of 3840 × 2160@144Hz, if the physical resolution of the display 260 is 3840 × 2160@144Hz, the display 260 is capable of outputting a display with a maximum resolution of 3840 × 2160 and a maximum refresh frame rate of 144. Meanwhile, the display 260 can also output and display other resolutions below 3840 × 2160@144Hz, for example, an image of 1920 × 1080@60hz resolution is output and displayed. The controller 250 may control the display 260 to output images at different resolutions within the physical resolution.

The controller 250 may detect a magnitude relationship between the initial resolution and the physical resolution. If the physical resolution of display 260 is less than or equal to the initial resolution, it is indicated that the display resolution supported by display 260 does not exceed the upper resolution limit that can be declared by the initial extended display identification data, which has been able to declare all the resolutions currently supported by display 260. At this time, the controller 250 may directly use the initial extended display identification data as extended display identification data EDID of the display device without adjusting the initial extended display identification data, and may notify the external device 500 to read the EDID information, so that the external device 500 generates media data and sends the media data to the display device. The initial extended display identification data may characterize to external device 500 the display resolution that display 260 supports output, but declare that the display resolution that display 260 supports output is less than or equal to the initial resolution.

If the physical resolution of display 260 is greater than the initial resolution, it is an indication that the display resolution of the output supported by display 260 has exceeded the upper resolution limit that can be declared by the initial extended display identification data, which can declare all the resolutions currently supported by display 260. At this time, if the initial extended display identification data is continuously used, the external device 500 may consider that the maximum resolution supported by the display device is the initial resolution, so as to generate video data at or below the initial resolution, which affects the viewing experience of the user. Accordingly, controller 250 may adjust the initial extended display identification data to enable external device 500 to determine all resolutions currently supported by display 260.

FIG. 7 illustrates an interaction flow diagram for components of a display device in some embodiments. As shown in fig. 7, the method comprises the following steps:

and S71, generating initial expansion display identification data after detecting that the external device interface is connected with the external equipment 500.

S72, generating extension information based on the physical resolution of the display; and combining the extended information and the initial extended display identification data to obtain first extended display identification data.

And S73, sending an instruction for reading the first extended display identification data to the external device 500, and acquiring data reading result information of the external device 500.

And S74, acquiring target extended display identification data based on the data reading result information, and determining the target extended display identification data as extended display identification data of the display device.

In some embodiments, the controller 250 may perform an expansion process on the initial expansion display identification data to obtain first expansion display identification data. The first extended display identification data can characterize to the peripheral 500 the output resolution supported by the display 260 and can state that the display 260 supports output at a display resolution greater than the initial resolution, e.g., state that the maximum display resolution that the display 260 supports output is the physical resolution.

The controller 250 may generate the extended information based on the physical resolution of the display 260. The extended information in the embodiment of the present application includes two fields: a second extension field and a third extension field. The extended information may characterize the physical resolution of the display 260, i.e., the resolution at which the display 260 supports output is greater than the original resolution.

The controller 250 may combine the extended information and the initial extended display identification data to obtain the first extended display identification data. Therefore, the first extended display identification data may contain four fields compared to the initial extended display identification data: a base field, a first extension field, a second extension field, and a third extension field. I.e., the first extended display identification data has two additional extended fields compared to the initial extended display identification data, may declare that the display 260 supports other resolutions higher than the initial resolution, and may include some other extended information. Note that, for the extended display identification data EDID, the bytes of each field included therein are 128.

The controller 250 may first generate the second extension field when performing the extension process on the initial extension display identification data. The second extension field is used to characterize the order of all extension fields.

Controller 250 may generate a 128-byte blank field first and obtain the order of all extended fields. Controller 250 may fill the order of all extension fields into the blank fields, e.g., successively filling the number of each field and the order of each field into the blank fields, resulting in a second extension field.

Considering that the second extension field may characterize the order of all extension fields, the order of the second extension field may be made the most advanced of all extension fields, i.e. the second extension field is the first of all extension fields, and the second extension field may be continued after the base field. Because the order of the second extension field is the first, the order of the second extension field does not need to be represented, and only the order of all the rest extension fields need to be represented.

For each field, a start flag and an end flag are required to distinguish each field.

The first byte of the second extension field is a start flag bit, which may be 0XF0. All bytes from the second byte to 127 th byte can characterize the order of all extension fields except the second extension field. The embodiment of the application comprises three extension fields: the field type display device comprises a first extension field, a second extension field and a third extension field, wherein the second extension field does not need to be represented by itself, and the field types of all the rest extension fields can be represented in sequence. An extension field type may be indicated in each byte. For example, the field type of the first extension field is 0X02, the field type of the third extension field is 0X70, and the first extension field is disposed before the third extension field. Therefore, the second byte in the second extension field may represent the field type 0X02 of the first extension field, and the third byte may represent the field type 0X70 of the third extension field. For subsequent bytes, since no extension field is used for representation, the byte may be padded with 0's. The last byte of the second extension field is an end flag bit, which may be a CheckSum check bit.

In some embodiments, the controller 250 may also generate the third extension field according to the physical resolution of the display 260. The third extension field may state that the display 260 supports other resolution cases of output that are higher than the original resolution. Consider the case where the initial extended display identification data is capable of declaring a resolution less than or equal to the initial resolution that is supported by the display 260. For other resolutions that the display 260 supports output that are greater than the original resolution, it may be stored in the third extension field.

Controller 250 may generate a 128 byte blank field and obtain all resolutions of the display 260 that support output. Among all resolutions, the controller 250 may screen out resolutions between the initial resolution and the physical resolution, which are greater than the initial resolution but less than or equal to the physical resolution. Controller 250 may fill these resolutions into the blank field to obtain a third extension field, which may also include some other extension information.

The first byte of the third extension field is a start flag bit, which may be 0X70. The second byte may be major and minor version number information of the third extension field, the third byte may be the number of valid bytes in the third extension field, the fourth byte may be a product type of the display device, and the fifth byte may be the number of subsequent extension fields.

The sixth byte through the 126 th byte may be a resolution extension unit for characterizing a case of a resolution higher than the original resolution of the display support output. In these resolutions, the detailed information of each resolution is represented by a timing, and each timing may occupy several bytes, including the specific resolution and the relevant parameter information corresponding to the resolution. Bytes that do not represent valid information may be padded with 0 s.

The 127 th byte may be an end flag bit of the resolution extension unit, which is a CheckSum check bit.

The 128 th byte may be the ending flag bit of the entire third extension field, which is a CheckSum check bit.

After obtaining the second extended field and the third extended field, the controller 250 may combine the second extended field, the third extended field, and the initial extended display identification data to obtain the first extended display identification data. The initial extended display identification data includes a base field and a first extended field, and the controller 250 may insert a second extended field between the base field and the first extended field and continue a third extended field after the first extended field, thereby obtaining the first extended display identification data. The sequence of fields in the first extended display identification data is: basic field-second extension field-third extension field-fourth extension field. Each field is 128 bytes, and therefore the first extended display identification data is 512 bytes of data, which is abbreviated as 512 bytes EDID in this embodiment of the present application.

After acquiring the first extended display identification data, the controller 250 may store the first extended display identification data in a preset storage module, i.e., a register RAM, and clear the originally stored initial extended display identification data. The controller 250 may transmit an instruction to the external device 500 so that the external device 500 reads the first extended display identification data stored in the register. External device 500 may determine, based on the first extended display identification data, information about the display device, including video parameters and audio parameters, such as display resolution that display 260 supports output, including physical resolution of display 260. The external device 500 may generate corresponding media data, including video data with a physical resolution or less, according to the information, and send the media data to the display device. The display device may play the media asset data sent by the external device 500.

It should be noted that the display device may store 512 bytes EDID or 256 bytes EDID in the register RAM, thereby declaring the resolution supported by itself to the external device 500. However, due to the wide variety of external devices 500, the capability of each external device 500 to process data may be different, and some external devices 500 may successfully read the 512-byte EDID, but some external devices 500 may only read the 256-byte EDID and may not read the 512-byte EDID. If the connected external device 500 has the capability of processing 512-byte EDID, but the EDID set by the display device is 256-byte EDID, the resolution of the external declaration of the display device may be weakened, and thus both the display device and the external device 500 may not exhibit the optimal performance. If the connected external device 500 does not have the capability of processing 512-byte EDID, but only has the capability of processing 256-byte EDID, but the EDID set by the display device is 512-byte EDID, the external device 500 cannot read the EDID set by the display device, that is, cannot determine the resolution condition supported by the display 260, and thus cannot generate media asset data or generate media asset data with lower resolution, which seriously affects user experience. Therefore, the display device needs to reasonably set the EDID stored in itself in consideration of the capability of the external device 500 to process the EDID.

In some embodiments, the display device may dynamically adjust its stored EDID. Fig. 8 illustrates a software configuration diagram in the display device 200 in some embodiments. As shown in fig. 8, the driver of the display device includes an HDMI, an EDID RAM, a DDC status statistic module, and a data parsing module. The application layer comprises an EDID generation program and an EDID judgment program.

Among them, the HDMI (high definition multimedia interface) is used to connect the external device 500 and the display device. The external device 500 may transmit data to the display device through the HDMI interface, thereby interacting with the display device.

The HDMI interface includes: 4 Transition Minimized Differential Signaling (TMDS) channels, mainly used for transmitting data, one Display Data Channel (DDC) and a Consumer Electronics Control (CEC) line. The DDC is a bus standard whose basic function is to transmit electronic file information of the display 260, such as receivable line frequency field frequency range, manufacturer, date of manufacture, product serial number, product model, standard display mode and its parameters, supported DDC standard category, EDID version information, and the like. The high-version DDC standard bus may also allow the external device 500 to directly adjust basic parameters of the display 260, such as brightness, contrast, magnitude of line field amplitude, line field center position, color temperature parameters, and the like.

The external device 500 may read EDID information in the display device through the DDC channel, thereby obtaining information of the display device, confirming a setting function displayed by the display device, and deciding in what format audio/video data is transmitted between the external device and the display device. The CEC channel is an optional channel, and can realize advanced control functions between some audio and video devices through the CEC channel, for example, the functions of supporting bidirectional communication between a video source and a digital television, and realizing simultaneous startup by pressing a single key, automatic power-on, automatic signal routing, remote control and the like are realized. The HDMI further includes a Hot Plug (HPD) pin, and the display device may detect whether the external device 500 is connected through the HPD, determine whether the external device 500 reads the EDID information, and determine whether the external device 500 starts to transmit the TMDS signal.

The display device may store the EDID information in an EDID RAM, which is the register RAM. The external device 500 can read the EDID information through the DDC channel. The DDC status statistics module may obtain a condition that the external device 500 reads the EDID, for example, which byte of the EDID the external device 500 can read, so as to determine which parameter information of the display device the external device 500 can obtain.

The external device 500 may also transmit some data, such as device information of the external device 500, through the HDMI. In the embodiment of the present application, the device information of the external device 500 is referred to as second device information. The data analysis module may analyze data sent by the external device 500, so as to obtain specific data.

The DDC status statistics module may send the condition that the external device 500 reads the EDID to the EDID determination program, and the data analysis module may send some data of the external device 500, for example, device information, to the EDID determination program. The display device may determine, through the EDID determining program, the EDID that the display device should currently set, for example, set 512-byte EDID or 256-byte EDID, and send the EDID condition that needs to be set to the EDID generating program.

The display device may generate the EDID information through the EDID generation program, for example, generate 512-byte EDID or 256-byte EDID, and the specific generation method may refer to the above steps, which are not described herein again. After the EDID is generated, the EDID may be sent to the EDID RAM for storage, so that the external device 500 may read the EDID.

In some embodiments, when the EDID stored in the display device is set, the controller 250 may first acquire the second device information of the external device 500, and the controller 250 may send a device information acquisition instruction to the external device 500.

After receiving the device information obtaining instruction, the external device 500 may send the device information of itself to the display device. The device information may include information such as a device type and a device model of the external device 500.

The controller 250 may first determine the capability of the external device 500 to read the EDID according to the device type of the external device 500. For some specific device types, it can be determined that these external devices 500 have the capability of reading 512-byte EDID, such as a computer host. Therefore, the controller 250 may pre-store these specific device types as target device types.

After acquiring the device type of the external device 500, the controller 250 may determine whether the device type is a preset target device type. If so, it indicates that the currently connected external device 500 already has the capability of reading 512 bytes EDID, so the controller 250 may directly determine the first extended display identification data as the extended display identification data of the display device, i.e., store 512 bytes EDID in the register RAM, so that the external device 500 reads the extended display identification data.

If the device type is not the preset target device type, it is not determined whether the external device 500 has the capability of reading the 512-byte EDID for the moment, and further detection of the external device 500 is required.

In some embodiments, controller 250 may detect external device 500 to determine the ability of external device 500 to read EDID. Each external device 500 corresponds to one device model, and for one external device 500, after the capability of reading the EDID is detected, it can be considered that all the external devices 500 of the device models corresponding to the external device 500 are detected, and the capability of reading the EDID is also read.

Therefore, after detecting the EDID reading capability of one external device 500, the device model of the external device 500 may be determined, and the device model and the EDID reading capability thereof form a corresponding relationship and are stored in a preset capability list. For example, the external device 500 has a device model of a game machine PS5, and the ability to read EDID is to read 512 bytes EDID. At this time, the display device needs to store 512 bytes of EDID into the register RAM, and simultaneously generates a corresponding relationship: gaming machine PS5-512 bytes EDID and stores it in the capability list.

In subsequent applications, after the external device 500 is connected to the display device, the controller 250 may continue to detect the capability of the external device 500 to read the EDID. At this time, the controller 250 may first obtain the device model of the external device 500, and traverse through a preset capability list to determine whether the EDID reading capability corresponding to the device model exists. If the EDID exists, the capability of the current external device 500 to read the EDID may be directly determined, so as to determine the EDID that needs to be stored in the register RAM. If not, controller 250 needs to continue to detect the ability of external device 500 to read EDID.

In some embodiments, upon detecting the capability of the external device 500 to read the EDID, the controller 250 may transmit an instruction to read the first extended display identification data to the external device 500. The external device 500 reads the result information of the data of the 512-byte EDID, and the capability of the external device 500 to read the EDID is judged, so that the target extended display identification data is determined. The object extension display identification data may be one of 512 bytes EDID and 256 bytes EDID.

When sending the instruction, the controller 250 may pull down the level of the Hot Plug/Clock pin first, and pull up the level of the Hot Plug/Clock pin after 500ms, thereby implementing sending the instruction for reading the first extended display identification data to the external device 500.

After receiving the instruction, the external device 500 may read 512 bytes EDID stored in the display device through the DDC channel in the HDMI. The controller 250 may acquire data reading result information of the external device 500 on the 512-byte EDID through the DDC state counting module, where the data reading result information may include a total number of bytes that the external device 500 can read. The field that external device 500 can completely read can be determined according to the total number of bytes.

When the external device 500 reads 512-byte EDID, it needs to sequentially read each field according to the sequence of the fields in the 512-byte EDID. The field order in 512 bytes EDID is base field-second extension field-third extension field-fourth extension field. Therefore, the controller 250 may determine the target field through the data reading result information of the external device 500. The target field refers to: 512 bytes EDID, the external device 500 can read the last field completely. The target field may characterize the ability of external device 500 to read EDID.

For example, the external device 500 can read the 288 th byte, that is, the external device 500 can read a portion of the third field in the 512-byte EDID. The external device 500 can read the first two fields completely, but cannot read the third field completely, and cannot read the fourth field completely. The destination field is therefore the second field, i.e. the second extension field. Therefore, the external device 500 can completely read two fields, which are 256 bytes, and the external device 500 has the capability of reading the 256-byte EDID.

In some embodiments, after determining the target field, the controller 250 may determine the target extended display identification data, i.e., extended display identification data EDID that the display device needs to store, according to the target field.

The controller 250 may detect the target field.

If the target field is detected to be any one of the basic field, the second extended field or the first extended field, it indicates that the external device 500 cannot completely read the fourth field of the 512-byte EDID, i.e., cannot completely read the fourth extended field. Therefore, the external device 500 cannot completely read the entire 512-byte EDID, i.e., does not have the capability of reading the 512-byte EDID. At this time, it is considered that the maximum resolution of the video data that the external device 500 can output does not exceed the initial resolution. Accordingly, 256 bytes EDID can be determined as the target extended display identification data. At this time, the controller 250 may store 256-byte EDID into the register RAM to make the external device 500 read.

If the target field is detected to be the third extended field, it indicates that the external device 500 can completely read the entire 512-byte EDID, and the external device 500 has the capability of reading the 512-byte EDID. At this time, it is considered that the maximum resolution of the video data that the external device 500 can output exceeds the initial resolution. Accordingly, the 512-byte EDID can be determined as the target extended display identification data. At this time, the controller 250 may store 512 bytes EDID into the register RAM to make the external device 500 read.

In some embodiments, in addition to 512 bytes EDID and 256 bytes EDID, other EDIDs, such as 128 bytes EDID and 384 bytes EDID, may be stored in the display device.

If the target field is the first field of the 512-byte EDID, i.e., the basic field, it indicates that the external device 500 can only completely read the 128-byte EDID, i.e., the external device 500 has the capability of reading the 128-byte EDID. At this time, the controller 250 may generate 128 bytes EDID. The controller 250 may generate the second extended display identification data according to the basic field, and may directly determine the basic field as the second extended display identification data, which is abbreviated as 128 bytes EDID in this embodiment. The controller 250 may determine the second extended display identification data as the target extended display identification data and may also determine the initial extended display identification data as the target extended display identification data.

If the target field is the third field of the 512-byte EDID, i.e., the first extended field, it indicates that the external device 500 can completely read the three fields, i.e., completely read the 384-byte EDID. At this time, the controller 250 may generate the third extended display identification data, which is abbreviated as 384-byte EDID in the embodiment of the present application. The controller 250 may determine the basic field, the second extended field, and the first extended field, and sequentially connected three fields as the third extended display identification data. The controller 250 may determine the third extended display identification data as the target extended display identification data and may also determine the initial extended display identification data as the target extended display identification data.

In some embodiments, after acquiring the target extended display identification data, the controller 250 may determine the target extended display identification data as extended display identification data of the display device. At this time, the controller 250 may store the target extended display identification data in the register RAM and notify the external device 500 to read the target extended display identification data.

After the external device 500 reads the target expansion display identification data, the parameter information of the display device, including the resolution condition that the display device supports output, may be determined. The external device 500 may generate the media asset data according to the parameter information and send the media asset data to the display device, and the display device may play the media asset data.

In some embodiments, the user may actively set the display resolution output by the display 260. For example, when an image is being displayed on the display 260, the user may perceive the image to be displayed as having a low degree of sharpness during viewing, and the user may select a target resolution as the display resolution output by the display 260. The user can find the display 260 setting interface in the system setting UI interface of the display device and set the display resolution output by the display 260 in the display 260 setting interface. FIG. 9 illustrates a schematic diagram of a display 260 setup interface in some embodiments. As shown in fig. 9, the display 260 includes a user interface resolution control, a brightness control, a color temperature control, a contrast control, and a factory reset control in the setting interface. The user may click on a user interface resolution control and the controller 250 controls the display 260 to display the user interface resolution status. The user interface resolution case includes the display resolution currently output by the display 260 and all resolutions that can be set. The user may select a target resolution to which the controller 250 updates the display resolution output by the display 260.

Before generating the media asset data, the external device 500 may further determine a target resolution set by a user in the display device. The external device 500 may generate corresponding media asset data according to the target resolution.

In some embodiments, the controller 250 may also determine the EDID of the display device according to the target resolution set by the user. Upon receiving a resolution setting instruction input by the user, the controller 250 may determine a target resolution set by the user. The controller 250 may detect a magnitude relationship of the initial resolution and the target resolution.

If the target resolution is less than or equal to the initial resolution, it is indicated that the display 260 will continue to display images at a lower resolution than the initial resolution. At this time, although the display 260 may display an image with a resolution higher than the initial resolution, the user has no need for the user temporarily, and the external device 500 reads 256 bytes EDID or 512 bytes EDID to determine the current resolution of the display 260. Considering that the external device 500 reads 512 bytes of EDID longer than 256 bytes of EDID, the controller 250 may store 256 bytes of EDID as EDID of the display device into the register RAM to make the external device 500 read, in order to improve efficiency.

If the target resolution is greater than the initial resolution, it indicates that the display 260 continuously displays an image greater than the initial resolution, and the external device 500 cannot determine the current resolution of the display 260 only by using the 256-byte EDID, so that the 256-byte EDID may be extended, and the 512-byte EDID may be used as the EDID of the display device, so that the external device 500 may read the EDID.

In some embodiments, the EDID has multiple versions, such as EDID1.4 version and EDID2.0 version. Different external devices 500 may support different EDID versions.

For example, when the external device 500 supports the EDID1.4 version but does not support the EDID2.0 version, if the display device sets the EDID to the EDID2.0 version, the external device 500 cannot read the EDID of the display device, and thus cannot output the media data to the display device. In order to establish a connection relationship with a different external device 500, the display device needs to switch its EDID version for the different external device 500.

In some embodiments, the controller 250 may first obtain the high-bandwidth digital content protection version when determining the version of the EDID.

After the external device 500 is connected to the display device, a verification instruction for protecting the high-bandwidth digital content may be sent to the display device. High-bandwidth Digital Content Protection (HDCP) is a technique for protecting uncompressed Digital audiovisual Content, which does not allow copy behavior at all from the Content source device to the display device. When a user illegally copies a high definition signal, the HDCP technique interferes, reducing the quality of a copied image, thereby protecting the content. The HDCP comprises: checking protocols, pixel encryption, and renewability. In a specific implementation, firstly, the sender verifies whether the receiving device is authorized to receive the encrypted data, and the validity of the data information received by the receiver is checked through the check protocol. The transmitter and the receiving device mutually exchange a Key Selection Vector (KSV) with 40 bits, the transmitter and the receiver carry out independent operation on the obtained KSV and the private key of the transmitter and the receiver, the operation results are compared, and if the two values are equal, the transmitting end can determine the receiver as a proper receiver of the HDCP.

Figure 10 illustrates a flow diagram for checking for high-bandwidth digital content protection in some embodiments. As shown in fig. 10, the method comprises the following steps:

s1001, when the display device and the external device 500 are powered on simultaneously, the external device 500 may send a verification instruction for high bandwidth digital content protection to the display device.

And S1002, when receiving the checking instruction, the display device sends a preset high-bandwidth digital content protection checking key to the external device 500.

And S1003, when the external device 500 reads the verification key, determining that the display device and the external device 500 are verified successfully.

In some embodiments, controller 250 may obtain the high-bandwidth digital content protection version when the verification is successful.

Controller 250 may obtain version 1.4 of the high-bandwidth digital content protection or obtain version 2.2 of the high-bandwidth digital content protection. The external device 500 preferably selects the highest version for verification during the process of initiating verification on the high-bandwidth digital content of the display device.

In some embodiments, controller 250 may determine the EDID version supported by external device 500 based on the high-bandwidth digital content protection version.

When the high-bandwidth digital content protection is version 1.4, it may be determined that the EDID version supported by external device 500 is EDID version 1.4. When the high-bandwidth digital content protection is the 2.2 version, it may be determined that the EDID version supported by external device 500 is the EDID2.0 version. It should be noted that the external device 500 has a downward compatibility function, that is, when it is detected that the external device 500 supports the EDID2.0 version, the external device 500 also compatibly supports the EDID2.0 version or less, and the external device 500 supports the EDID1.4 version and the EDID2.0 version.

When the external device 500 is connected to the display device through the HDMI interface, the HDCP verification is initiated on the display device, and since the 1.4 version of the HDCP and the 2.2 version of the HDCP correspond to the EDID version of the external device 500, the EDID version corresponding to the highest version of the HDCP verified by the external device 500 may be the highest EDID version supported by the external device 500 by default.

In some embodiments, the controller 250 may determine the EDID version supported by the external device 500 as a target version of the extended display identification data of the display device. The controller 250 may adjust the version of the target extended display identification data to the target version.

In some embodiments, the display device is provided with an EDID version auto-switching function. That is, when the controller 250 obtains the target version, the version of the target extended display identification data is automatically adjusted to the target version.

The user can set the EDID version by himself. The user can close the automatic EDID version switching function, so that the EDID version can be switched automatically. Fig. 11 illustrates an EDID version switching interface in some embodiments. As shown in fig. 11, the user may call up the EDID version switching interface in the system setting of the display device. The EDID version switching interface includes three options: auto, EDID1.4 and EDID 2.0. And when the user selects automatic, the display equipment starts the EDID version automatic switching function. And when the user selects the EDID1.4 or the EDID2.0, the display equipment closes the EDID version automatic switching function and keeps the EDID version as the target version selected by the user.

When the user closes the automatic EDID version switching function 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 preferentially taken as the priority. When the EDID version supported by the external device 500 is the EDID2.0 version, the EDID version of the display device may be switched to the EDID2.0 version according to the EDID version of the external device 500. However, if the EDID version of the display device is manually set to the EDID1.4 version by the user, the EDID version of the display device is switched to the 1.4 version.

An embodiment of the present application further provides a method for setting extended display identification data, as shown in fig. 12, the method includes:

step 1201, after detecting that the external device interface is connected with the external equipment, generating initial expansion display identification data. The initial extended display identification data is used to characterize a display resolution of the display support output that is less than or equal to the initial resolution.

Step 1202, generating extension information based on the physical resolution of the display; and combining the extended information and the initial extended display identification data to obtain first extended display identification data. The first extended display identification data is used to characterize a display resolution of the display support output as a physical resolution.

Step 1203, sending an instruction for reading the first extended display identification data to the external device, and obtaining data reading result information of the external device.

And 1204, acquiring target extended display identification data based on the data reading result information, and determining the target extended display identification data as extended display identification data of the display device.

In some embodiments, before generating the extended information based on the physical resolution of the display,

acquiring the physical resolution of a display; detecting the size relation between the initial resolution and the physical resolution; if the physical resolution is less than or equal to the initial resolution, determining the initial extended display identification data as extended display identification data of the display device; if the physical resolution is greater than the initial resolution, extended information is generated based on the physical resolution of the display.

In some embodiments, generating initial extended display identification data comprises:

acquiring first equipment information and video parameters of display equipment, and generating a basic field according to the first equipment information and the video parameters; acquiring mode information and audio parameters of display equipment, and generating a first extension field according to the mode information and the audio parameters; and connecting the first extension field behind the basic field to obtain initial extension display identification data.

In some embodiments, the extension information includes a second extension field and a third extension field. Generating extended information based on a physical resolution of a display, comprising:

acquiring the sequence of all the extension fields, and generating a second extension field according to the sequence; and acquiring the physical resolution of the display, and generating a third extension field according to the physical resolution.

Combining the extended information with the initial extended display identification data, comprising:

and inserting the second extension field between the basic field and the first extension field, and connecting the third extension field behind the first extension field to obtain the first extension display identification data.

In some embodiments, sending an instruction to read the first extended display identification data to the external device includes:

acquiring second equipment information of the external equipment, wherein the equipment information comprises an equipment type; judging whether the device type is a preset target device type or not; and if the first extended display identification data is the extended display identification data of the display equipment, sending an instruction for reading the first extended display identification data to the external equipment.

In some embodiments, obtaining the target extended display identification data based on the data reading result information includes:

determining a target field according to the data reading result information; when the target field is the external equipment, the first extension display identification data is read in sequence, the tail field can be completely read, and the field sequence in the first extension display identification data is as follows: a base field, a second extension field, a first extension field, and a third extension field; if the target field is the basic field or the second extension field or the first extension field, determining the initial extension display identification data as target extension display identification data; and if the target field is the third extension field, determining the first extension display identification data as the target extension display identification data.

In some embodiments, if the target field is a base field, generating second extended display identification data from the base field, and determining the second extended display identification data or the initial extended display identification data as the target extended display identification data; and if the target field is the first extension field, determining the basic field, the second extension field and the first extension field which are connected in sequence as third extension display identification data, and determining the third extension display identification data or the initial extension display identification data as the target extension display identification data.

in response to a resolution setting instruction input by a user, determining a target resolution set by the user; detecting the size relation between the initial resolution and the target resolution; if the target resolution is less than or equal to the initial resolution, determining the initial extended display identification data as extended display identification data of the display device; and if the target resolution is larger than the initial resolution, executing a step of generating the extension information based on the physical resolution of the display.

In some embodiments, after acquiring the target extended display identification data based on the data reading result information,

acquiring a high-bandwidth digital content protection version; acquiring a target version of the extended display identification data according to the high-bandwidth digital content protection version; and adjusting the version of the target extended display identification data to the target version.

The same and similar parts in the embodiments in this specification may be referred to one another, and are not described herein again.

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. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of software products, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and include instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method in the embodiments or some parts of the embodiments of the present invention.

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 these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

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

Claims

1. A display device, comprising:

a display;

an external device interface configured to connect an external apparatus;

a controller configured to:

generating extension information based on a physical resolution of a display, the physical resolution being greater than the initial resolution; combining the extended information and the initial extended display identification data to obtain first extended display identification data, wherein the first extended display identification data is used for representing that the display resolution supported and output by a display is the physical resolution;

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

before performing the step of generating the extension information based on the physical resolution of the display,

acquiring the physical resolution of a display;

detecting a size relationship between the initial resolution and the physical resolution;

if the physical resolution is smaller than or equal to the initial resolution, determining the initial extended display identification data as extended display identification data of display equipment; and if the physical resolution is greater than the initial resolution, executing a step of generating extension information based on the physical resolution of the display.

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

in performing the step of generating the initial extended display identification data,

acquiring first equipment information and video parameters of display equipment, and generating a basic field according to the first equipment information and the video parameters;

acquiring mode information and audio parameters of display equipment, and generating a first extension field according to the mode information and the audio parameters;

and continuing the first extension field behind the basic field to obtain initial extension display identification data.

4. The display device according to claim 3, wherein the extension information includes a second extension field and a third extension field; the controller is further configured to:

in performing the step of generating the extension information based on the physical resolution of the display,

acquiring the sequence of all the extension fields, and generating a second extension field according to the sequence;

acquiring the physical resolution of a display, and generating a third extended field according to the physical resolution;

in performing the step of combining the extension information and the initial extension display identification data,

and inserting the second extension field between the basic field and the first extension field, and continuing the third extension field behind the first extension field to obtain first extension display identification data.

5. The display device according to claim 2, wherein the controller is configured to:

before executing the step of sending an instruction for reading the first extended display identification data to the external device,

acquiring second equipment information of the external equipment, wherein the equipment information comprises an equipment type;

judging whether the equipment type is a preset target equipment type or not;

and if the first extended display identification data is the extended display identification data of the display equipment, the step of sending an instruction for reading the first extended display identification data to the external equipment is executed.

6. The display device of claim 4, wherein the controller is further configured to:

in performing the step of acquiring the target extended display identification data based on the data reading result information,

determining a target field according to the data reading result information; the target field is a last field which can be completely read when the external device reads the first extended display identification data in sequence, and the sequence of the fields in the first extended display identification data is as follows: the base field, the second extension field, the first extension field, and the third extension field;

determining the initial extended display identification data as target extended display identification data if the target field is the base field or the second extended field or the first extended field; and if the target field is the third extension field, determining the first extension display identification data as target extension display identification data.

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

if the target field is the basic field, generating second extended display identification data according to the basic field, and determining the second extended display identification data or the initial extended display identification data as target extended display identification data;

and if the target field is the first extension field, determining the basic field, the second extension field and the first extension field which are connected in sequence as third extension display identification data, and determining the third extension display identification data or the initial extension display identification data as target extension display identification data.

8. The display device according to claim 2, wherein the controller is configured to:

determining a target resolution set by a user in response to a resolution setting instruction input by the user;

detecting the size relation between the initial resolution and the target resolution;

if the target resolution is smaller than or equal to the initial resolution, determining the initial extended display identification data as extended display identification data of display equipment; and if the target resolution is greater than the initial resolution, executing a step of generating extended information based on the physical resolution of the display.

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

after the step of acquiring the target extended display identification data based on the data reading result information is performed,

acquiring a high-bandwidth digital content protection version;

acquiring a target version of extended display identification data according to the high-bandwidth digital content protection version;

adjusting the version of the target extended display identification data to the target version.

10. An extended display identification data setting method is applied to display equipment, and is characterized by comprising the following steps: