CN114387913A

CN114387913A - EDID (extended display identification data) adjusting method and system of LED display screen

Info

Publication number: CN114387913A
Application number: CN202111633097.6A
Authority: CN
Inventors: 欧阳琴; 石昌金
Original assignee: Shenzhen Absen Optoelectronic Co Ltd
Current assignee: Shenzhen Absen Optoelectronic Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-04-22
Anticipated expiration: 2041-12-28
Also published as: CN114387913B

Abstract

The application discloses an EDID adjusting method and system of an LED display screen, and belongs to the technical field of display. The method is applied to an LED display screen control system comprising a video processor, a controller and an LED display screen, and comprises the following steps: the video processor obtains a video to be displayed and video parameters including a first color gamut and a first color depth of the video to be displayed, and sends the video to be displayed and the video parameters to the controller. And the controller receives the video to be displayed and the video parameters sent by the video processor, and adjusts the second color gamut and/or the supported second color depth of the initial EDID of the LED display screen according to the video parameters to obtain a target EDID which is matched with the video parameters and comprises a third color gamut and/or a third color depth. Therefore, the LED display screen can display the video to be displayed with a better display effect when displaying the video to be displayed according to the target EDID, and the video to be displayed is restored to a greater extent.

Description

EDID (extended display identification data) adjusting method and system of LED display screen

Technical Field

The application relates to the technical field of display, in particular to an EDID (extended display identification data) adjusting method and system of an LED display screen.

Background

With the development of display technology, LED (Light Emitting Diode) display screens have an important position in the display field due to their characteristics of strong expansibility, long service life, and the like. Wherein, for satisfying the needs of different environment, the LED display screen that different environment used can be formed by at least one display module with different concatenation modes concatenation. The splicing mode refers to the number of the display modules transversely included and the number of the display modules longitudinally included in the spliced LED display screen. In addition, every display module in at least one display module of concatenation LED display screen has the same display parameter, and the display parameter is used for instructing display module to show video ability, and the display parameter can include colour gamut and the color depth of support etc..

In the prior art, the LED Display screen may Display a video according to a driver corresponding to EDID (Extended Display Identification Data) of the LED Display screen. The EDID is a parameter for describing the capability of the LED display screen to support a video source, and may include parameters such as color gamut and supported color depth. The EDID includes different parameters and different corresponding drivers. In addition, the EDID of the LED display screen is related to the display parameters and the splicing mode of at least one display module of the spliced LED display screen. And if the display parameters and/or the splicing mode of at least one display module are different, the EDID of the LED display screen is also different.

However, since different videos have different video parameters, and the video parameters are used to indicate basic features of the videos, there may be a case where the video parameters of the videos do not match the EDID of the LED display screen, so that the LED display screen has a poor display effect on the videos according to the driving program corresponding to the EDID. For example, the video parameter of the video to be displayed includes a first color gamut, the EDLD of the LED display screen includes a second color gamut, and the first color gamut is not matched with the second color gamut, so that when the LED display screen displays the video to be displayed according to the driving program corresponding to the second color gamut, the displayed video has a color distortion problem compared with the video to be displayed.

Disclosure of Invention

The application provides an EDID adjusting method and system of an LED display screen, which can enable the LED display screen to display a video to be displayed with a better display effect and restore the video to be displayed to a greater extent.

The technical scheme is as follows:

in a first aspect, an EDID adjustment method for an LED display screen is provided, where the method is applied to an LED display screen control system, the LED display screen control system includes a video processor, a controller, and an LED display screen, the video processor is connected to the controller, and the controller is connected to the LED display screen, and the method includes:

the video processor obtains a video to be displayed and video parameters of the video to be displayed, wherein the video parameters comprise a first color gamut and a first color depth;

the video processor sends the video to be displayed and the video parameters to the controller;

the controller receives the video to be displayed and the video parameters sent by the video processor, and adjusts an initial EDID of the LED display screen according to the video parameters to obtain a target EDID matched with the video parameters, wherein the initial EDID comprises a second color gamut and/or a supported second color depth, and the target EDID comprises a third color gamut and/or a third color depth;

and the controller drives the LED display screen to display the video to be displayed according to the target EDID.

As an example, the adjusting the initial EDID of the LED display screen according to the video parameters to obtain a target EDID matched with the video parameters includes:

if the controller determines that the initial EDID comprises the second color gamut, obtaining the first color gamut from the video parameters, and performing color gamut mapping on the second color gamut according to the first color gamut to obtain a third color gamut matched with the first color gamut;

and if the controller determines that the initial EDID comprises the second color depth, acquiring the first color depth from the video parameters, and taking the color depth matched with the first color depth in the second color depth as the third color depth.

As one example, the video parameters further include a first brightness, the initial EDID further includes a second brightness, and the target EDID further includes a third brightness;

the adjusting the initial EDID of the LED display screen according to the video parameters to obtain a target EDID matched with the video parameters comprises:

the controller obtains the first brightness from the video parameters, and adjusts the second brightness according to the first brightness to obtain the third brightness matched with the first brightness.

As one example, the initial EDID further includes a resolution;

the video processor acquires a video to be displayed and video parameters of the video to be displayed, and the method comprises the following steps:

the video processor receives a video source sent by video source equipment, and acquires a source video to be displayed and video parameters of the source video to be displayed from the video source;

and the video processor acquires the resolution from the initial EDID, performs resolution conversion on the source video to be displayed according to the resolution to obtain the video to be displayed, and takes the video parameters of the source video to be displayed as the video parameters of the video to be displayed.

and if the controller determines that the initial EDID comprises the second color gamut, acquiring a preset fourth color gamut, performing color gamut mapping on the second color gamut according to the fourth color gamut to obtain a third color gamut, wherein the third color gamut is matched with the fourth color gamut.

As an example, the controller drives the LED display screen to display the video to be displayed according to the target EDID, including:

the controller determines a driving program corresponding to the target EDID according to the target EDID, and sends the driving program and the video to be displayed to the LED display screen;

and the LED display screen receives the driving program and the video to be displayed sent by the controller, and displays the video to be displayed according to the driving program.

As an example, the LED display screen is composed of at least one display module, and the display module has display parameters;

before the video processor obtains a video to be displayed and video parameters of the video to be displayed, the method further comprises the following steps:

and the controller determines the initial EDID according to the display parameters of any one of the at least one display module and/or the splicing mode of the at least one display module.

As an example, the video parameter further includes a bit depth, and the LED display screen is composed of at least one display module;

before the driving the LED display screen according to the target EDID to display the video to be displayed, the method further includes:

and the controller determines the screen connecting mode of the at least one display module according to the bit depth, the splicing mode of the at least one display module and the loading capacity of the screen connecting line so as to connect the at least one display module by using the screen connecting line according to the screen connecting mode.

In a second aspect, an LED display screen control system is provided, where the system includes a video processor, a controller and an LED display screen, the video processor is connected to the controller, and the controller is connected to the LED display screen;

the video processor is used for acquiring a video to be displayed and video parameters of the video to be displayed, and sending the video to be displayed and the video parameters to the controller, wherein the video parameters comprise a first color gamut and a first color depth;

the controller is configured to receive the video to be displayed and the video parameters sent by the video processor, and adjust an initial EDID of the LED display screen according to the video parameters to obtain a target EDID matched with the video parameters, where the initial EDID includes a second color gamut and/or a supported second color depth, and the target EDID includes a third color gamut and/or a third color depth;

the controller is further used for driving the LED display screen to display the video to be displayed according to the target EDID;

the controller is further used for determining a driving program corresponding to the target EDID according to the target EDID and sending the driving program and the video to be displayed to the LED display screen;

the LED display screen is used for receiving the driving program sent by the controller and displaying the video to be displayed according to the driving program.

The technical scheme provided by the embodiment of the application has the following beneficial effects:

in the embodiment of the application, an EDID adjusting method of an LED display screen is provided, and is applied to an LED display screen control system comprising a video processor, a controller and an LED display screen. The controller receives the video to be displayed and the video parameters sent by the video processor, adjusts the initial EDID of the LED display screen according to the video parameters to obtain a target EDID matched with the video parameters, wherein the video parameters comprise a first color gamut and a first color depth, the initial EDID comprises a second color gamut and/or a supported second color depth, and the target EDID comprises a third color gamut and/or a third color depth. The second color gamut and/or the second color depth supported by the second color gamut of the initial EDID of the LED display screen are/is adjusted to be matched with the video parameters of the video to be displayed, and the target EDID including the third color gamut and/or the third color depth drives the LED display screen to display the video to be displayed according to the target EDID, so that the video to be displayed can be displayed by the LED display screen with a better display effect, and the video to be displayed is restored to a greater extent.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a system diagram of an LED display screen control system according to an embodiment of the present disclosure;

fig. 2 is a flowchart of an EDID adjustment method for an LED display screen according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a screen connection manner provided by an embodiment of the present application;

fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

It should be understood that reference to "a plurality" in this application means two or more. In the description of the present application, "/" means "or" unless otherwise stated, for example, a/B may mean a or B; "and/or" herein is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, for the convenience of clearly describing the technical solutions of the present application, the terms "first", "second", and the like are used to distinguish the same items or similar items having substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

Before explaining the embodiments of the present application in detail, an application scenario of the embodiments of the present application will be described.

Because the LED display screen can be formed by at least one display module in different concatenation modes, therefore the LED display screen has the advantage that scalability is stronger, can expand wantonly in different environment to satisfy the demand of different environment, treat to show the video and show. For example, LED display screens are widely used in various environments such as commercial media, cultural performance markets, news distribution, and stock exchange.

As an example, in a shop publicity field, the staff selects an LED display screen spliced by 25 display modules in a 5 × 6 splicing manner. Wherein, the 25 display modules have the same display parameters. The EDID of the LED display screen can be determined according to the display parameters and the splicing mode of 5-6, so that the propaganda video to be displayed is displayed according to the driving program corresponding to the EDID of the LED display screen, and the propaganda effect is achieved.

The principle of displaying the video is to restore the effect of making the propaganda video to be displayed to the maximum extent. However, different promotional videos to be displayed have different video parameters, so that the situation that the video parameters are not matched with the initial EDID of the LED display screen may exist, and in this situation, the videos displayed by the LED display screen cannot better restore the promotional videos to be displayed, and the display effect is poor.

Based on this, in order to solve the above-mentioned problem that the display effect of the LED display screen to the video to be displayed is relatively poor because the EDID of the LED display screen is not matched with the video parameter of the video to be displayed, the embodiment of the present application provides an EDID adjusting method and system of the LED display screen, which can adjust the EDID of the LED display screen according to the video parameter, so that the EDID of the LED display screen is matched with the video parameter, and thus the LED display screen can display the video to be displayed with a better display effect, and restore the video to be displayed to a greater extent.

Referring to fig. 1, fig. 1 is a system schematic diagram of an LED display screen control system according to an embodiment of the present disclosure. As shown in fig. 1, the LED display screen control system includes a video processor 101, a controller 102 and an LED display screen 103, and may implement an EDID adjustment method for the LED display screen.

The video processor 101 is connected to the controller 102, and the controller 102 is connected to the LED display screen 103.

The video processor 101 is configured to obtain a video to be displayed and video parameters of the video to be displayed, and send the video to be displayed and the video parameters to the controller 102.

Wherein the video parameters comprise a first color gamut and a first color depth.

For example, the LED display screen control system further includes a video source device 104, the video processor 101 may receive a video source sent by the video source device 104, obtain a source video to be displayed and video parameters of the source video to be displayed from the video source, obtain a resolution from the initial EDID, perform resolution conversion on the source video to be displayed according to the resolution to obtain a video to be displayed, and use the video parameters of the source video to be displayed as the video parameters of the video to be displayed. The video source comprises a source video to be displayed and video parameters of the source video to be displayed.

The video processor 101 and the controller 102 may be connected in a wired or wireless manner, which is not limited in this embodiment. For example, the connection may be a wired connection, such as a connection via a network cable, a serial port line, or an HDMI (High Definition Multimedia Interface).

The video processor 101 is connected to the video source device 104 in a wired or wireless manner, which is not limited in this embodiment of the application. For example, the connection may be a wired connection, such as a connection via a network cable, a serial port line, or an HDMI (High Definition Multimedia Interface).

As one example, video processor 101 may be any device that implements control and data processing. For example, the video processor 101 is a computer device or server.

The controller 102 is configured to receive a video to be displayed and video parameters sent by the video processor 101, and adjust an initial EDID of the LED display screen 103 according to the video parameters to obtain an object EDID matched with the video parameters.

Wherein the initial EDID includes a second color gamut and/or a supported second color depth and the target EDID includes a third color gamut and/or a third color depth.

It should be noted that the controller 102 may adjust the second color gamut and/or the supported second color depth of the initial EDID to be the target EDID including the third color gamut and/or the third color depth, which is matched with the video parameter of the video to be displayed, so that the controller 102 drives the LED display screen 103 to display the video to be displayed according to the target EDID, and thus the LED display screen 103 may display the video to be displayed with a better display effect, and restore the video to be displayed to a greater extent.

As one example, the controller 102 may be any device that implements control and data processing. For example, the controller 102 is a computer device or server.

As an example, the video processor 102 and the controller 102 may also be integrated into a computer device.

The controller 102 is further configured to determine a driver corresponding to the target EDID according to the target EDID, and send the driver and the video to be displayed to the LED display screen 103. The LED display screen 103 is configured to receive a driver and a video to be displayed sent by the controller 102, and display the video to be displayed according to the driver. The driving program is used for driving the LED display screen 103 to display a video to be displayed.

The LED display screen 103 is composed of at least one display module. Wherein, every display module in at least one display module has the same display parameter. For example, the display parameters may include one or more of a number of pixels, a fifth color gamut, or a supported fourth color depth.

As one example, each of the at least one display module includes a light emitting surface and a driving surface. The light emitting surface comprises LED lamp beads, the driving surface comprises a driving chip and a storage chip, the driving chip is used for driving the LED lamp beads to emit light according to a driving program, and the storage chip is used for storing display parameters of the display module.

For example, when the display module leaves the factory, the display parameters are burned in the memory chip in advance, so that after the modules with the same display parameters can be spliced in any splicing manner to obtain the LED display screen 103, the controller 102 can quickly generate the initial EDID of the LED display screen 103. Wherein, initial EDID can be confirmed according to the display parameters and the splicing mode of the display module.

As one example, the display parameters include a number of pixels, a fifth color gamut, and a supported fourth color depth, and the initial EDID includes a resolution, a second color gamut, and a supported second color depth. The second color gamut is the same as the fifth color gamut, the second color depth is the same as the fourth color depth, and the resolution is the product of the number of pixels and the number of at least one display module of the spliced LED display screen. For example, the number of pixels is 384 × 216, and at least one display module is tiled in a 5 × 6 manner, so that the resolution of the EDID is 1920 × 1296.

As an example, the controller 102 is connected to the LED display screen in a wired or wireless manner, which is not limited in this embodiment of the application. For example, the controller 102 and the LED display screen are connected by a wire, such as a network cable or an HDMI (High Definition Multimedia Interface).

For example, the LED display screen 103 further includes a display screen processor 105, the controller 102 is connected to the display screen processor 105 through a wired or wireless connection, and the display screen processor 105 is configured to receive a driving program sent by the controller 102 and drive the LED display screen 103 to display a video to be displayed according to the driving program.

As an example, the display screen processor 105 is connected with each display module of the at least one module by a wire for connecting the at least one module.

For example, the display screen processor 105 is connected to the driving chip of each module of the at least one module, and is configured to drive the driving chip, so that the driving chip drives the LED lamp bead to emit light, and the LED display screen displays a video to be displayed.

The connection mode between the display screen processor 105 and each driver chip in at least one module is also called a screen connection mode, which means the connection mode between at least one display module.

For example, the screen connection mode may be a horizontal or vertical sequential connection to at least one display module, a diagonal connection to at least one display model, or a jumper connection. Generally, the screen connecting mode adopts horizontal or longitudinal sequential connection to facilitate the wire arrangement of workers.

The screen connection mode may be determined by the controller 102 or by a worker, which is not limited in this embodiment of the application.

For example, the controller 102 may determine the screen connection mode of the at least one display module according to the bit depth, the splicing mode of the at least one display module, and the loading capacity of the screen connection line, so as to connect the at least one display module by using the screen connection line according to the screen connection mode. Wherein the video parameters further comprise a bit depth. The bit depth indicates the number of bits required to store or transmit a bit of pixel color. In general, the bit depth may be 8 bits or 10 bits.

As one example, the display screen processor 105 may be any device that implements control and data processing. For example, the display processor 105 is a computer device or server.

In addition, the controller 102 may also be integrated into the display screen processor 105.

Next, a method for adjusting EDID of an LED display screen according to an embodiment of the present application will be described.

Referring to fig. 2, fig. 2 is a flowchart illustrating an EDID adjusting method for an LED display panel according to an embodiment of the present disclosure. The EDID adjustment method for the LED display screen can be applied to the LED display screen control system provided in the embodiment of fig. 1, and the method includes the following steps:

step 201, a video processor obtains a video to be displayed and video parameters of the video to be displayed.

The video to be displayed is video stream data, namely the video to be displayed is transmitted in the LED display screen control system by the video stream data.

The video processor can obtain the video to be displayed and the video parameters from the video source equipment.

For example, the video source device may be any device that can emit a video to be displayed, for example, the video source is a DVD (Digital Versatile Disc) playing box that can emit a DVD video.

As an example, the video processor may obtain the video to be displayed and the video parameters from the video source device in a wired or wireless manner.

In addition, the video parameters may further include a first resolution, and the initial EDID of the LED display screen may further include a second resolution. The first resolution is used for indicating the number of horizontal pixels and the number of longitudinal pixels corresponding to each frame of image in the video to be displayed, and the second resolution is used for indicating the resolution of the LED display screen capable of normally displaying the video to be displayed. If the first resolution is not matched with the second resolution, namely the first resolution is different from the second resolution, the LED display screen cannot normally display the video to be displayed. For example, if the first resolution is higher than the second resolution, the LED display screen may have a black screen or a blurred screen when displaying a video to be displayed. Therefore, when the video processor acquires the video from the video source, resolution conversion is performed to obtain the video to be displayed which can be normally displayed by the LED display screen.

As an example, the video processor obtaining the video to be displayed and the video parameters of the video to be displayed may comprise the steps of:

in step 2011, the video processor receives the video source sent by the video source device, and obtains the source video to be displayed and the video parameter of the source video to be displayed from the video source.

Wherein the source video to be displayed is a video stream data.

For example, if the video source is a DVD player box, the video processor can receive the DVD video source from the DVD player box, and the DVD video source is the video source.

As an example, if the connection mode of the video processor and the video source is HDMI, the video processor may directly obtain the video source from the HDMI interface.

As an example, if the connection mode between the video processor and the video source is a network cable connection network cable, the video processor acquires a video file from the video source from the network cable interface, and separates a source video to be displayed from the video file. The Video file may include Audio and Video, and the format of the Video file may be AVI (Audio Video Interleaved) or RMVB (Real Media Variable bit rate), and the like.

For example, a tool with a video separation function is used for separating audio and video of a video file so as to separate source video to be displayed from the video file.

In addition, the video file may be stored in the video processor in advance. The video processor can acquire the video file from the storage space and acquire the source video to be displayed from the video file.

After the source video to be displayed is obtained, the video processing may utilize a video decoder to decode the source video to be displayed, so as to obtain video parameters.

As an example, the video decoder may be any tool having a video decoding function. For example, the Video decoder may be an HEVC (High Efficiency Video Coding) decoder or an NGOV (Next Gen Open Video) decoder.

For example, after decoding a source video to be displayed by using a video decoder, the video processor may obtain metadata, where the metadata includes video parameters. The metadata includes basic parameters of a display of an original device that produced the source video to be displayed and display effect information when the source video to be displayed was produced on the original device.

As one example, the video parameters may further include one or more of a first luminance, a bit depth, and a tone mapping curve.

Step 2012, the video processor obtains the second resolution from the initial EDID, and determines whether the first resolution and the second resolution of the source video to be displayed are matched.

Wherein the first resolution of the source video to be displayed may be obtained from the video parameters.

Wherein the video processor may obtain the initial EDID from the controller and obtain the second resolution from the initial EDID.

For example, after receiving a source video to be displayed sent by a video source, the video processor sends an EDID resolution acquisition request to the controller. The controller receives an EDID resolution acquisition request sent by the video processor and sends a second resolution of the initial EDID to the video processor. The video processor receives the second resolution transmitted by the controller.

In addition, the controller may pre-store the initial EDID, or determine the initial EDID according to the display parameter of any one of the at least one display module and the splicing manner of the at least one display module, which is not limited in this embodiment of the application.

For example, before the video processor obtains the video to be displayed and the video parameters, the staff splices at least one display module according to the at least one display module in a certain splicing manner so that the controller determines the initial EDID, and the video processor performs resolution conversion based on the initial EDID.

As an example, the staff can select at least one display module according to the demand, and splice at least one display module in a certain splicing mode to obtain the LED display screen.

The display parameters of each display module in the at least one display module are the same, and the display parameters can comprise one or more of the number of pixels, the fifth color gamut and the supported fourth color depth.

As an example, after the LED display screen is obtained, the LED display screen may be connected with the controller through a data transmission line, so that the controller may obtain display parameters and a splicing manner of any display module of the spliced LED display screen, and then determine the initial EDID according to the display parameters of any display module of the at least one display module and/or the splicing manner of the at least one display module.

For example, if the display parameters include the number of pixels, a fifth color gamut, and a supported fourth color depth, and the initial EDID includes a second resolution, a second color gamut, and a supported second color depth, the second color gamut is the fifth color gamut, the supported second color depth is the supported fourth color depth, and the resolution is a product of the number of pixels and the number of at least one display module of the tiled LED display screen.

As an example, the number of pixels is 384 × 216, and at least one display module is tiled in a 5 × 6 manner, the resolution of the initial EDID is 1920 × 1296.

After determining the initial EDID, the controller may further store the initial EDID, so that the video processor obtains a second resolution in the initial EDID, and performs resolution conversion on the video of the source to be displayed according to the second resolution.

Wherein, whether the first resolution and the second resolution match or not means whether the first resolution and the second resolution are equal or not. If the first resolution is equal to the second resolution, the first resolution matches the second resolution. If the first resolution is not equal to the second resolution, the first resolution does not match the second resolution.

Step 2013, if the video processor determines that the first resolution is matched with the second resolution, the video processor takes the source video to be displayed as the video to be displayed.

If the first resolution is matched with the second resolution, the LED display screen can display the source video to be displayed, so that resolution conversion is not needed, and the source video to be displayed is directly used as the video to be displayed.

In step 2014, if it is determined that the first resolution is not matched with the second resolution, the video processor performs resolution conversion on the source video to be displayed according to the second resolution to obtain the video to be displayed with the second resolution.

The video processor can also take the video parameter of the source video to be displayed as the video parameter of the video to be displayed.

If the first resolution is not matched with the second resolution, the LED display screen cannot normally display the source video to be displayed, and therefore the resolution conversion of the source video to be displayed needs to be performed according to the second resolution.

Wherein the first resolution not matching the second resolution comprises the first resolution being greater than the second resolution and the first resolution being less than the second resolution.

For example, if the first resolution is greater than the second resolution, the video processor compresses and clips the source video to be displayed to obtain the video to be displayed with the second resolution. If the first resolution is smaller than the second resolution, the video processor stretches the source video to be displayed to obtain the video to be displayed with the second resolution, so that the resolution of the video to be displayed is matched with the second resolution of the initial EDID, the LED display screen can normally display the video to be displayed, and the problem of black screen or screen splash is avoided.

In step 202, the video processor sends the video to be displayed and the video parameters to the controller.

The video processor can send the video to be displayed and the video parameters to the controller in a wired or wireless mode.

In step 203, the controller receives the video to be displayed and the video parameters sent by the video processor.

In step 204, the controller determines whether the initial EDID matches the video parameters.

Wherein the initial EDID includes a second color gamut and/or a supported second color depth.

Wherein, whether the initial EDID is matched with the video parameters refers to whether the parameters in the initial EDID are matched with the parameters of the video parameters. And if at least one parameter in the initial EDID does not match at least one parameter of the video parameters, determining that the initial EDID does not match the video parameters. And determining that the initial EDID is matched with the video parameters only if all the parameters in the initial EDID are matched with the video parameters.

For example, the video parameters include a first color gamut and a first color depth, and the initial EDID includes a second color gamut and a supported second color depth. When the first color gamut matches the second color gamut and the first color depth matches the second color depth, the controller determines that the initial EDID matches the video parameters, otherwise, the controller determines that the initial EDID does not match the video parameters.

In step 205, if the controller determines that the initial EDID matches the video parameters, the controller takes the initial EDID as the target EDID.

Wherein the target EDID includes a third color gamut and/or a third color depth.

For example, if the video to be displayed last time displayed on the LED display screen and the video to be displayed this time are the same video, the initial EDID is not adjusted, so that invalid calculation can be reduced.

As one example, the initial EDID may be a target EDID obtained by the controller last time. For example, after obtaining the target EDID, the controller stores the target EDID as an initial EDID in the storage space.

And step 206, if the controller determines that the initial EDID is not matched with the video parameters, adjusting the initial EDID of the LED display screen according to the video parameters to obtain a target EDID matched with the video parameters.

After the controller obtains the target EDID, the LED display screen can be driven according to the target EDID to display the video to be displayed.

The adjusting of the initial EDID means adjusting parameters included in the initial EDID, so that the adjusted parameters in the initial EDID are respectively matched with the video parameters, and the video to be displayed is restored to the maximum extent.

Wherein the initial EDID includes the second color gamut and/or the supported second color depth, and the adjustment to the initial EDID includes an adjustment to the second color gamut and/or an adjustment to the supported second color depth.

For example, the video parameters include a first color gamut and a first color depth, the initial EDID includes a second color gamut and/or a supported second color depth, and the target EDID includes a third color gamut and/or a third color depth, then the controller adjusts the initial EDID of the LED display screen according to the video parameters, and the target EDID of the LED display screen can be obtained through the following steps:

1) and if the controller determines that the initial EDID comprises the second color gamut, acquiring the first color gamut from the video parameters, performing color gamut mapping on the second color gamut according to the first color gamut, and acquiring a third color gamut matched with the first color gamut.

The first color gamut is a color gamut space corresponding to a display screen of original equipment for making a video to be displayed, and represents a color range which can be displayed by the display screen of the original equipment. The second color gamut refers to the range of colors that can be displayed by the LED display screen.

In general, a color gamut corresponds to a color gamut space, and different color spaces have different color ranges. In general, a spatial coordinate system may be established for a gamut space to represent spatial components of the gamut space by XYZ, with coordinates (X, Y, Z) indicating one color in the gamut space. In addition, the relation between XYZ values and RGB (Red, Green, Blue, Red, Green, Blue) component values of the gamut space is known.

The first color gamut and the second color gamut are not matched to indicate that a first color gamut space corresponding to the first color gamut is different from a second color gamut space corresponding to the second color gamut, and also indicate that a color range corresponding to the first color gamut is different from a color range corresponding to the second color gamut.

The gamut mapping of the second gamut according to the first gamut is to map a color (RGB component value) in the second gamut space corresponding to the second gamut to a color (RGB component value) in the first gamut space corresponding to the first gamut.

For example, for convenience of description, in the embodiments of the present application, XYZ values of the first gamut space are referred to as X1Y1Z1 values, and XYZ values of the second gamut space are referred to as X2Y2Z2 values, the gamut mapping of the second gamut according to the first gamut can be implemented by the following steps:

1) calculating a first distance between an X2 boundary value of the second gamut space and the white point, a second distance between a Y2 boundary value of the second gamut space and the white point, a third distance between a Z2 boundary value of the second gamut space and the white point, and a fourth distance between an X1 boundary value of the first gamut space and the white point, a fifth distance between a Y1 boundary value of the first gamut space and the white point, and a sixth distance between a Z1 boundary value of the second gamut space and the white point, and determining a spatial ratio of the second gamut space to the first gamut space according to a ratio of the fourth distance to the first distance, a ratio of the fifth distance to the second distance, and a ratio of the sixth distance to the third distance.

Wherein the spatial ratio is an expansion or compression ratio of the X2Y2Z2 value of the second gamut space to the X1Y1Z1 value of the first gamut space.

2) According to the relation between the X2Y2Z2 value and the RGB component value of the second gamut space, the RBG component value of the second gamut is converted into an X2Y2Z2 value of the second gamut space, and then the X2Y2Z2 value is multiplied by the spatial proportion to obtain X1Y1Z1 of the first gamut space.

3) Calculating the RGB component values of the first color gamut according to the relationship between the X1Y1Z1 values and the RGB component values of the first color gamut space, and multiplying the RGB component values of the first color gamut by the space proportion to obtain the RGB component values of the third color gamut, wherein the third color gamut space corresponding to the third color gamut is the first color gamut space.

In this way, the second gamut can be subjected to gamut mapping to obtain a third gamut (RGB component values). And then, the controller can drive the LED display screen to display the video to be displayed according to the driving program corresponding to the third color domain. Because the driving program corresponds to the third color gamut, and the third color gamut space corresponding to the third color gamut is the same as the first color gamut space corresponding to the first color gamut of the video parameter of the video to be displayed, the LED display screen can display the video to be displayed with a better display effect, and restore the video to be displayed to a greater extent.

In addition, the controller may perform gamut mapping by setting a gamut in advance.

For example, the initial EDID includes a second color gamut, the target EDID includes a third color gamut, and the controller may acquire a preset fourth color gamut, and perform color gamut mapping on the second color gamut according to the fourth color gamut to obtain the third color gamut. Wherein the third gamut matches the fourth gamut.

As an example, the preset fourth color gamut may be a standard color gamut space, such as bt.709, DCI-P3, or bt.2020, or may be others, which is not limited in this embodiment of the present application.

2) And if the controller determines that the initial EDID comprises the supported second color depth, acquiring the first color depth from the video parameters, and taking the color depth matched with the first color depth in the supported second color depth as a third color depth.

Wherein the third color depth matches the first color depth.

Wherein, the supported second color depth refers to the color depth which can be supported by the LED display screen. Typically, the color depth may be 8bit, 16bit, 24bit or 32bit, and the supported second color depth includes at least one color depth. For example, the second color depth supported by the LED display screen includes 8 bits, 16 bits, and 24 bits.

The first color depth indicates a color depth corresponding to a display screen of an original device for producing a video to be displayed, and indicates a bit number required for describing a pixel color when the original device performs photoelectric (optical signal is converted into an electrical signal) conversion, that is, a bit number for encoding each bit of pixel color, and also indicates a sum of colors of each bit of pixel color, which are attributes of each frame image.

As an example, if the second color depth supported by the LED display screen includes 8 bits, 16 bits, and 24 bits, and the first color depth is 16 bits, 16 bits is used as the third color depth of the target EDID.

In addition, if the supported second color depth does not include a color depth matching the first color depth, the color depth closest to the first color depth is used as the third color depth.

For example, the second color depth supported by the LED display screen includes 8 bits and 16 bits, and the first color depth is 24 bits, and then 16 bits is used as the third color depth of the target EDID.

After the third color depth is obtained, the controller can drive the LED display screen to display the video to be displayed according to the driving program corresponding to the third color depth. Because the driving program corresponds to the third color depth, the LED display screen can display the video to be displayed with a better display effect and restore the video to be displayed to a greater extent.

As an example, the video parameter further includes a first brightness, the initial EDID further includes a second brightness, and the target EDID further includes a third brightness, and then the controller may obtain the first brightness from the video parameter, and adjust the second brightness according to the first brightness to obtain the third brightness matched with the first brightness.

Since the description of the color of one pixel includes the color gamut and the brightness, the mapping is only performed on the second color gamut of the initial EDID, and the color of the video to be displayed cannot be well restored. As such, the second brightness of the initial EDID is also adjusted in the embodiment of the present application.

The brightness indicates the brightness of each frame of image in the video to be displayed, the brightness is different, and the colors displayed by the LED display screen are different. For example, green can be classified into dark green and light green due to different brightness.

As one example, the first luminance may be a maximum luminance, a minimum luminance, or an average luminance. And adjusting the second brightness according to the first brightness to obtain a third brightness, namely adjusting the same parameters of the color components of each channel of each frame of image of the video to be displayed simultaneously to change the overall brightness of the image.

For example, the controller may directly use the first luminance as the third luminance, so that the controller drives the LED display screen to display the video to be displayed according to the driving program corresponding to the third luminance, and the color of the video to be displayed is well restored.

As an example, the video parameters further include a tone mapping curve, the initial EDID further includes a second brightness, the target EDID further includes a third brightness, and the controller may further tone map the second brightness according to the tone mapping curve to obtain a third brightness, where the third brightness is matched to the tone mapping curve.

The tone mapping curve is a mapping curve based on a high dynamic range (a difference between a maximum luminance value and a minimum luminance value is large), and coordinate values of horizontal and vertical coordinates of the tone mapping curve represent luminance, which is also called a gray scale value, and a range of the horizontal and vertical coordinates is a gray scale number. The number of gray levels is larger for a high dynamic range video and smaller for a low dynamic range video. The tone mapping curve is obtained by mapping a luminance domain having a large number of gray levels to a luminance domain having a small number of gray levels, or mapping a luminance domain having a small number of gray levels to a luminance domain having a large number of gray levels. That is, the number of gray levels can also be adjusted when implementing color gamut mapping. Since the number of gray levels is related to the color depth, for example, the power of 2 to the color depth is the number of gray levels, the second color depth of the initial EDID can be adjusted to obtain the third color depth while the second brightness is adjusted according to the tone mapping curve.

Generally, tone mapping may map the dynamic range of the image to a normalization region first, and then map the gray value of the normalization region to another gray value according to a tone mapping curve. For example, the gray scale number of each frame of image in the video to be displayed is 0-255, and the tone mapping curve is a gamma (γ) curve. Tone mapping normalizes the dynamic range of the image to the interval [0, 1]. For convenience of explanation, IN the embodiments of the present application, the normalized gray scale value is referred to as IN, and the gray scale value subjected to tone mapping is referred to as INIf OUT, OUT is equal to IN^γThe integer of multiplying OUT by 255 is the mapped image.

However, the above embodiment is only described by taking the full-scale mapping as an example, and is not limited to performing tone mapping on the second luminance to obtain the third luminance. For example, the tone mapping may also be incremental tone mapping.

As an example, the tone mapping curve may also be a PQ curve or a HLG curve, and the like, which is not limited in the embodiment of the present application.

From the above analysis, the adjustment of the second luminance is related to the tone mapping curve. When the tone mapping curve is determined, a third luminance determined by adjusting the second luminance according to the tone mapping curve is also determined. Therefore, tone mapping generally refers to determining which curve the tone mapping curve of the video parameter is, that is, determining which curve is used when the video to be displayed is made, so as to perform tone mapping on the second luminance according to the determined tone mapping curve, thereby obtaining the third luminance. And then, the controller can drive the LED display screen to display the video to be displayed according to the driving program corresponding to the third brightness. Because the driving program corresponds to the tone mapping curve when the video to be displayed is manufactured, the color of the video displayed by the LED display screen can be well restored when the video to be displayed is manufactured.

In addition, before the controller obtains the target EDID of the LED display screen, the controller should further obtain the display parameter of any one of the at least one display module of the spliced LED display screen and/or the splicing manner of the at least one display module, so as to determine the initial EDID according to the display parameter and/or the splicing manner.

It should be noted that the EDID of the LED display screen provided in the embodiment of the present application is adjusted to any parameter in the initial EDID, for example, the second color gamut and/or the supported second color depth of the initial EDID is adjusted. Of course, other parameters of the initial EDID may be adjusted, and the examples of the present application are not intended to be limiting. For example, the parameters such as the second brightness and the gray scale of the initial EDID can be adjusted.

In addition, the EDID method of the LED display screen provided by the embodiment of the present application adjusts the initial EDID according to the video parameter of the video to be displayed, so that the method can be applied to any video to be displayed. The initial EDID is determined by the controller according to the display parameters pre-stored in any display module of the at least one display module and the splicing mode of the at least one display module, namely, the EDID method of the LED display screen provided by the embodiment of the application can be applied to any scene where the LED display screen is expanded.

And step 207, the controller drives the LED display screen to display the video to be displayed according to the target EDID.

The driving program is used for driving the LED display screen to display the video to be displayed. The driving program comprises color parameters of each pixel point of each frame of image of the video to be displayed, and the color parameters correspond to the target EDID.

As an example, the controller may determine a driver corresponding to the target EDID according to the target EDID, and then send the driver and the video to be displayed to the LED display screen. Therefore, the LED display screen receives the driving program and the video to be displayed sent by the controller, and the video to be displayed is displayed according to the driving program.

For convenience of explanation, in the embodiments of the present application, a driver corresponding to the target EDID is referred to as a target driver.

The controller can determine at least one driving program corresponding to at least one parameter according to the at least one parameter included in the object EDID, then package the at least one driving program to obtain an object driving program, and send the object driving program to the LED display screen. The parameters of the object EDID are different, and the object driver is also different.

For example, the target EDID includes a third color gamut, which refers to RGB values corresponding to each pixel point in each frame image. The controller determines a corresponding driver according to the third color gamut, wherein the color parameter of each pixel point of each frame of image included in the driver includes a sixth color gamut, and the sixth color gamut is matched with the third color gamut, i.e., the RGB value corresponding to the sixth color gamut is the same as the RGB value corresponding to the third color gamut. Therefore, the driving program corresponding to the target EDID can be determined, and the driving program can comprise the color parameters of each pixel point of each frame of image of the video to be displayed, so that the LED display screen can display the video to be displayed according to the driving program, and restore the video to be displayed to a greater extent.

Specifically, the controller can send the determined driving program to a display screen processor of the LED display screen, and the display screen processor sends the driving program to the driving chip, so that the driving chip drives the LED lamp beads to emit light according to the driving program, and the LED display screen displays the video to be displayed.

As an example, after receiving the driver, the display screen processor decomposes the driver into color parameters of each pixel, and then sends the color parameters of the decomposed pixels to the driver chip corresponding to the pixel, and the driver chip can drive the lamp beads corresponding to the pixel to emit light according to the color parameters.

For example, the color parameter corresponding to the pixel point includes a sixth color gamut (RGB value), and the driving chip lights the lamp bead according to the sixth color gamut, so that the color of the light emitted by the lamp bead is the color of the RGB value. Therefore, all the driving chips drive each lamp bead to emit light or not according to the color parameters of each pixel point, and the picture formed by all the lamp beads is a frame of image, so that the LED display screen displays the video to be displayed.

Because the color parameter of each pixel point of each frame of image included by the driving program corresponds to the target EDID, and the target EDID corresponds to the video parameter, after all the driving chips drive the LED lamp beads to emit light according to the corresponding driving program, the image displayed by the LED display screen can restore the image of the video to be displayed to a greater extent, so that the image of the video to be displayed can be displayed with a better display effect. When all the driving chips continuously drive the LED lamp beads to emit light according to the corresponding driving programs, the video displayed by the LED display screen can restore the video to be displayed to a greater degree, and the video to be displayed is displayed with a better display effect.

Before the controller drives the LED display screen to display a video to be displayed according to the target EDID, the controller also determines the screen connecting mode of at least one display module according to the bit depth, the splicing mode of at least one display module and the loading capacity of a screen connecting line.

The video parameters further comprise bit depth, and the loading capacity of the screen connecting line refers to pixel points which can be loaded by the screen connecting line. For example, when the screen connecting line is a network line and the bit depth can be 8 bits, the carrying capacity of a single network line is 65 ten thousand pixel points.

As an example, the controller may use the shortest path for transmission of the video to be displayed and the minimum screen connecting line as a judgment condition for determining the screen connecting manner.

For example, the LED display screen is spliced by 25 display modules in a 5 × 5 splicing manner, the number of pixels of the display parameters of the display modules is 384 × 216, one display module includes 82944 pixels, and the 25 display modules include 2073600 pixels, and since the loading capacity of a single network cable is 65 ten thousand pixels, theoretically, at least 4 network cables are required, (only 7 display modules can be loaded by one network cable). However, since the splicing mode is 5 × 5, in order to make the transmission path of the video to be displayed shortest, 25 display modules can be connected by using 5 network cables in a mode that one network cable carries a transverse display module or a longitudinal display module of the LED display screen. For example, please refer to fig. 3, fig. 3 is a schematic diagram of a screen connection method according to an embodiment of the present disclosure. As shown in fig. 3 (a), the 5 network cables connect 25 display modules in such a manner that one network cable carries 5 display modules in the longitudinal direction.

Note that, as in the diagram (a) in fig. 3, the arrows of the network lines do not indicate the transmission direction of the data, and those skilled in the art will understand that the transmission direction of the data is bidirectional.

As an example, after the controller determines the screen connection mode, the screen connection mode may be sent to the user equipment, so that the user equipment displays the screen connection mode, and the relevant person connects the at least one display module according to the screen connection mode.

For example, the controller is wirelessly connected to the user device. And after determining the splicing mode, the controller sends the splicing mode to the user equipment in the formats of images or files and the like. And the user equipment receives the splicing mode sent by the controller and displays the image or the file.

As an example, after the controller determines the screen connection mode according to the bit depth of the video parameter of the video to be displayed, the LED display screen may receive the video to be displayed and the driver sent by the controller, so as to drive the LED lamp bead to emit light according to the driver, so that the LED display screen displays the video to be displayed. However, when the bit depth of the video parameter of the video to be displayed is changed, the carrying capacity of the screen connecting line is changed, and in order to enable the LED to normally display the video to be displayed after the bit depth is changed, the controller should determine whether to change the screen connecting mode according to the bit depth of the video parameter.

For example, when at least one display module is connected, the screen connection mode is determined when the bit depth is 8 bits. When the bit depth of the video parameter of the video to be displayed is 10 bits, the screen connecting mode needs to be changed to use more screen connecting lines to carry the pixel number of the video to be displayed because the carrying capacity of the screen connecting lines is reduced.

For example, 25 display modules are spliced to an LED display screen in a 5 × 5 splicing manner, the number of pixels of display parameters of the display modules is 384 × 216, one display module includes 82944 pixels, and 25 display modules include 2073600 pixels. In addition, it is most convenient to use 10 net wires for output according to the least amount of modification. The splicing method can refer to fig. 3. As shown in fig. 3 (b), 5 network cables connect 25 display modules in a manner that one network cable carries 3 display modules in the longitudinal direction of the LED display screen, and the other 5 network cables connect 25 display modules in a manner that one network cable carries 2 display modules in the longitudinal direction of the LED display screen.

Note that, as in the diagram (b) in fig. 3, the arrows of the network lines do not indicate the transmission direction of the data, and those skilled in the art will understand that the transmission direction of the data is bidirectional.

Fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application. As shown in fig. 4, the computer device 4 includes: a processor 401, a memory 402 and a computer program 403 stored in the memory 402 and operable on the processor 401, the steps in the EDID adjustment method for an LED display screen in the above-described embodiment being implemented when the processor 401 executes the computer program 403.

The computer device may be the video processor, controller or display screen processor of embodiment 1 above. In a specific implementation, the computer device may be a desktop computer, a laptop computer, a network server, a palmtop computer, a mobile phone, a tablet computer, a wireless terminal device, a communication device, or an embedded device, and the embodiment of the present application does not limit the type of the computer device. Those skilled in the art will appreciate that fig. 4 is merely an example of a computing device and is not intended to limit the computing device, and may include more or fewer components than those shown, or some components in combination, or different components, such as input output devices, network access devices, etc.

Processor 401 may be a Central Processing Unit (CPU), and Processor 401 may also be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or any conventional processor.

The storage 402 may be, in some embodiments, an internal storage unit of the computer device, such as a hard disk or a memory of the computer device. The memory 402 may also be an external storage device of the computer device in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the computer device. Further, the memory 402 may also include both internal storage units of the computer device and external storage devices. The memory 402 is used to store an operating system, application programs, a Boot Loader (Boot Loader), drivers, data, and other programs. The memory 402 may also be used to temporarily store data that has been output or is to be output. For example, the memory 402 may store video files of video to be displayed.

An embodiment of the present application further provides a computer device, where the computer device includes: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, the processor implementing the steps of any of the various method embodiments described above when executing the computer program.

The embodiments of the present application also provide a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

The embodiments of the present application provide a computer program product, which when run on a computer causes the computer to perform the steps of the above-described method embodiments.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above method embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium and used by a processor to implement the steps of the above method embodiments. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or apparatus capable of carrying computer program code to a photographing apparatus/terminal device, a recording medium, computer Memory, ROM (Read-Only Memory), RAM (Random Access Memory), CD-ROM (Compact Disc Read-Only Memory), magnetic tape, floppy disk, optical data storage device, etc. The computer-readable storage medium referred to herein may be a non-volatile storage medium, in other words, a non-transitory storage medium.

It should be understood that all or part of the steps for implementing the above embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The computer instructions may be stored in the computer-readable storage medium described above.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/computer device and method may be implemented in other ways. For example, the above-described apparatus/computer device embodiments are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The above-mentioned 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 technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. An extended display identification data EDID adjusting method of an LED display screen is applied to an LED display screen control system, the LED display screen control system comprises a video processor, a controller and an LED display screen, the video processor is connected with the controller, the controller is connected with the LED display screen, and the method comprises the following steps:

2. The method of claim 1, wherein said adjusting the initial EDID of the LED display screen based on the video parameters to obtain a target EDID matching the video parameters comprises:

3. The method of claim 1, wherein the video parameters further include a first brightness, the initial EDID further includes a second brightness, the target EDID further includes a third brightness;

4. The method of claim 1, wherein the initial EDID further comprises a resolution;

5. The method of claim 1, wherein said adjusting the initial EDID of the LED display screen based on the video parameters to obtain a target EDID matching the video parameters comprises:

6. The method of claim 1, wherein the controller drives the LED display screen to display the video to be displayed according to the target EDID, comprising:

7. The method of claim 1, wherein the LED display screen is comprised of at least one display module, the display module having display parameters;

8. The method of claim 1, wherein the video parameters further comprise a bit depth, the LED display screen is comprised of at least one display module;

9. The LED display screen control system is characterized by comprising a video processor, a controller and an LED display screen, wherein the video processor is connected with the controller which is connected with the LED display screen;