Display system, data transmission method and data transmission device thereof

Abstract

The present application relates to the field of signal processing technology, and discloses a data transmission method for a display system, the method comprising: receiving image data sent by a mainboard; obtaining extended display identification data EDID of a display screen; converting the format of the image data according to the EDID, and sending it to the display screen for display. In the disclosed embodiment, a signal converter is provided between the mainboard and the display screen, so as to realize the conversion and transmission of data between the mainboard and the display screen, so that a display screen with mismatched specifications can correctly identify and display the image sent by the mainboard, so as to smoothly complete the inspection of the mainboard or simplify the assembly process of the display device, and at the same time, prolong the service life of the mainboard and the display screen.

Description

Technical Field

[0001] The present application relates to the technical field of signal processing technology, for example, to a display system and a data transmission method and a data transmission device thereof. Background Art

[0002] At present, before a TV motherboard leaves the factory, a display screen of corresponding specifications is connected to the motherboard to test whether the motherboard is normal. Based on the existing testing scheme, the TV motherboard processing factory needs to purchase display screens of different specifications in advance, and the display screen and the motherboard need to be connected strictly according to the corresponding rules during the motherboard inspection process. After the motherboard leaves the factory, it needs to be used with the corresponding display screen.

[0003] In the process of implementing the embodiments of the present disclosure, it was found that at least the following problems exist in the related art: during the inspection and use of the mainboard, the specifications of the connected display screen and the mainboard are incorrect, which can easily cause damage to the mainboard or the display screen. Summary of the invention

[0004] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0005] The embodiments of the present disclosure provide a display system and a data transmission method and a data transmission device thereof to solve the technical problem of damage to a mainboard or a display screen caused by mismatch in specifications between the mainboard and the display screen.

[0006] In some embodiments, a data transmission method for a display system includes:

[0007] Receive image data sent by the mainboard;

[0008] Get the EDID (Extended Display Identification Data) of the display;

[0009] The format of the image data is converted according to the EDID and sent to the display screen for display.

[0010] In some embodiments, a data transmission device for a display system includes:

[0011] A receiving module, configured to receive image data sent by the mainboard;

[0012] An acquisition module is configured to acquire the EDID of the display screen;

[0013] A conversion module, configured to convert the format of the image data according to the EDID;

[0014] The sending module is configured to send the image data after the format conversion to the display screen for display.

[0015] In some embodiments, a data transmission device for a display system includes a processor and a memory storing program instructions, and the processor is configured to execute the aforementioned data transmission method for a display system when executing the program instructions.

[0016] In some embodiments, a display system includes:

[0017] a display screen configured to display an image;

[0018] A main board configured to send image data to be displayed to the display screen; and,

[0019] Any of the aforementioned data transmission devices.

[0020] The display system and data transmission method and device provided by the embodiments of the present disclosure can achieve the following technical effects:

[0021] A signal converter is set between the mainboard and the display screen to realize the conversion and transmission of data between the mainboard and the display screen, so that the display screen with mismatched specifications can correctly identify and display the image sent by the mainboard, so as to smoothly complete the inspection of the mainboard or simplify the assembly process of the display device. At the same time, the service life of the mainboard and the display screen is extended.

[0022] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by corresponding drawings, and these exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and wherein:

[0024] Figure 1 is a flow chart of a data transmission method for a display system provided by an embodiment of the present disclosure;

[0025] Figure 2 is a flow chart of a data transmission method for a display system provided by an embodiment of the present disclosure;

[0026] Figure 3 is a schematic diagram of the structure of a data transmission device for a display system provided by an embodiment of the present disclosure;

[0027] Figure 4 It is a schematic diagram of the structure of a data transmission device for a display system provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0029] The display screen in the embodiment of the present disclosure is a 4K display screen. As users' requirements for video quality clarity increase, ultra-high-definition televisions have gained a large consumer group. In the related art, the standard interface between the motherboard of an ultra-high-definition television and the 4K screen video signal is a high-speed serial interface V-by-One interface. Referred to as VBO interface. The display signal output by the motherboard from the V-by-One interface must be connected to an ultra-high-definition screen equipped with a VBO interface before the display screen can be seen. If the interface specifications between the motherboard and the display screen are inconsistent, the picture will not be displayed, and it may even cause damage to the motherboard or the display screen. The commonly used interfaces of existing 4K display screens are DVI, VGA, and HDMI. For users who need to upgrade the motherboard, they cannot display the picture normally after purchasing an ultra-high-definition television motherboard, which brings great inconvenience to users. The display provided in the embodiment of the present disclosure sets a signal converter between the motherboard and the display screen to realize the conversion and transmission of data between the motherboard and the display screen, so as to improve the adaptability between the motherboard and the display screen.

[0030] Figure 1 The data transmission method for a display system provided by an embodiment of the present disclosure includes:

[0031] Step S101, receiving image data sent by the mainboard.

[0032] Step S102, obtaining the EDID of the display screen.

[0033] Step S103, converting the format of the image data according to the EDID and sending it to the display screen for display.

[0034] In this embodiment, a signal converter is provided between the mainboard and the display screen. Depending on the type of display screen or the manufacturer, the display screen EDID is also different. The signal converter receives the image data sent by the mainboard and obtains the EDID of the display screen, so that the signal converter converts the format of the image data according to the EDID in step S103 to adapt to the resolution supported by the display screen, so that the display screen can successfully display the image data sent by the mainboard and avoid damage to the mainboard and the display screen.

[0035] In some embodiments, the EDID of the display screen includes multiple types, for example, the EDID of the A display screen includes 1280*600, 1280*720, 1280*1024 and 1440*900. The EDID of the B display screen includes 1366*768, 1920*1080 and 3840*2160.

[0036] In step S103, when converting the format of image data according to the EDID of the display screen, optionally, the highest resolution or the second highest resolution in the EDID of the display screen is selected for conversion to enhance the display effect and improve the user experience. For example: when converting the format of image data according to the EDID of the A display screen, 1440*900 or 1280*1024 is selected for conversion. When converting the format of image data according to the EDID of the B display screen, 3840*2160 or 1920*1080 is selected for conversion.

[0037] In step S103, the protocols for transmitting image data between the display screen and the signal converter are different according to the different types of the display screen image input interface. Therefore, after converting the format of the image data according to the EDID, the signal converter encapsulates the image data into a format that the display screen can recognize and sends it to the display screen for display.

[0038] In the disclosed embodiment, a signal converter is provided between the mainboard and the display screen, so as to realize the conversion and transmission of data between the mainboard and the display screen, so that the display screen with mismatched specifications can correctly identify and display the image sent by the mainboard, so as to smoothly complete the inspection of the mainboard or simplify the assembly process of the display device, and at the same time, extend the service life of the mainboard and the display screen.

[0039] In some embodiments, before step S101 of receiving the image data sent by the mainboard, the method further includes:

[0040] When the power-on signal is detected, a handshake signal is sent to the mainboard;

[0041] When the handshake with the mainboard is successful, the image data is received.

[0042] In the disclosed embodiment, the mainboard mainly outputs VBO signals based on the VBO standard. In addition to image data, the VBO signal also includes a timing control signal embedded in the image data. The timing control signal may be unstable with probability, causing the signal converter to fail to convert the image data, and the display screen cannot display the image normally. Therefore, when receiving image data, the signal converter needs to send a handshake signal to the mainboard, and after determining that the handshake with the mainboard is successful and the mainboard stably sends the VBO signal, it receives the image data, thereby improving the transmission efficiency of the image data, avoiding the failure of image display caused by unstable data transmission, and reducing the error rate of mainboard detection.

[0043] In some embodiments, the mainboard outputs LVDS based on the LVDS (Low-Voltage Differential Signaling) protocol. In addition to the image data, the LVDS also includes a timing control signal embedded in the image data.

[0044] In some embodiments, before sending the handshake signal to the mainboard, the method further includes: pulling down the HTPDN (Hot Plug Detect Signal, hot plug detection control pin) signal. The HTPDN signal is a detection flag, and the HTPDN signal is pulled down to record the detection start time. The signal converter controls the handshake process according to the HTPDN signal.

[0045] In some embodiments, if the handshake time between the mainboard and the signal converter exceeds a set time, the handshake fails, thereby effectively preventing the handshake process from continuing to run and reducing the efficiency of image data transmission.

[0046] In some embodiments, the handshake with the mainboard is successful, including:

[0047] Receive the CDR (clock data recovery) signal sent by the mainboard;

[0048] When the CDR PLL (clock data recovery phase lock loop) is stable, the clock lock LOCKN signal is pulled low. When the CDR PLL is stable, it indicates that the motherboard can stably send image data to the signal converter through the VBO interface. After the LOCKN signal is pulled low, the signal converter starts to receive image data and performs subsequent conversion operations, which increases the probability of the display successfully displaying the image, reduces the error rate of the motherboard detection, and improves the efficiency of the motherboard detection personnel.

[0049] Figure 2 The data transmission method for a display system provided by an embodiment of the present disclosure includes:

[0050] Step S201, when a power-on signal is detected, the hot plug detection control pin HTPDN signal is pulled low, and a handshake signal is sent to the mainboard.

[0051] Step S202: When the clock data recovery phase-locked loop CDR PLL is stable, the clock lock LOCKN signal is pulled low.

[0052] Step S101, receiving image data sent by the mainboard.

[0053] Step S102, obtaining the EDID of the display screen.

[0054] Step S103, converting the format of the image data according to the EDID and sending it to the display screen for display.

[0055] In the disclosed embodiment, a signal converter is provided between the mainboard and the display screen, so as to realize the conversion and transmission of data between the mainboard and the display screen, so that the display screen with mismatched specifications can correctly identify and display the image sent by the mainboard, so as to smoothly complete the inspection of the mainboard or simplify the assembly process of the display device, and at the same time, extend the service life of the mainboard and the display screen.

[0056] In some embodiments, in step S103, converting the format of the image data according to the EDID includes:

[0057] Parse EDID to determine the resolution supported by the display;

[0058] Adjust display parameters of image data according to resolution;

[0059] The image data after adjusting the display parameters is encapsulated according to the data transmission protocol supported by the display screen.

[0060] In some embodiments, when adjusting the display parameters of the image data according to the resolution, the adjustment is performed according to the highest resolution or the second highest resolution supported by the display screen, so that the display screen can correctly display the image while improving the clarity of the image display.

[0061] In some embodiments, the data transmission protocol supported by the display screen is determined according to the interface of the display screen. Optionally, the interface of the display screen is HDMI (High Definition Multimedia Interface), and the data transmission protocol supported by the display screen is the HDMI protocol. Optionally, the interface of the display screen is VGA (Video Graphics Array, video transmission standard) interface, and the data transmission protocol supported by the display screen is VGA protocol. Optionally, the interface of the display screen is DVI (Digital Visual Interface), and the data transmission protocol supported by the display screen is DVI protocol.

[0062] In some embodiments, before converting the format of the image data according to the EDID, the method further includes: acquiring a data transmission protocol supported by the display screen.

[0063] In some embodiments, adjusting display parameters of the image data according to the resolution includes:

[0064] Analyze the image data to obtain the selection signal DE, the horizontal synchronization signal Hsync, the vertical synchronization signal Vsync and the data signal DATA;

[0065] Convert DE, Hsync, Vsync and DATA according to resolution.

[0066] In some embodiments, a resolution information mapping table is stored in the signal converter. The resolution information mapping table is based on the mapping relationship between each standard resolution information and the corresponding standard Hsync frequency and standard Vsync frequency. Before the signal converter converts DE, Hsync, Vsync and DATA according to the resolution, it looks up the table to obtain the standard Hsync frequency and standard Vsync frequency corresponding to the resolution.

[0067] In some embodiments, the data transmission protocol supported by the display screen is the HDMI protocol. When converting DATA according to the resolution, the sampling mode of DATA is adjusted from YCbCr 4:2:0 to YCbCr4:2:2, the resolution is superimposed on YCbCr, and the sampling mode is adjusted according to the receiving state of the display end, for example: from YCbCr 4:2:2 to YCbCr 4:4:4 or from YCbCr 4:4:4 to YCbCr 4:2:2.

[0068] In some embodiments, the step further includes converting the sampling mode of DATA from YCbCr to RGB mode.

[0069] In some embodiments, after converting Hsync, Vsync and DATA according to the resolution, the signal converter adjusts DE to indicate that the format conversion of the image data is completed, and executes the operation of sending the image data to the display screen for display according to the change of DE.

[0070] Figure 3 The data transmission device for a display system provided by an embodiment of the present disclosure includes:

[0071] The receiving module 301 is configured to receive image data sent by the mainboard.

[0072] The acquisition module 302 is configured to acquire the EDID of the display screen.

[0073] The conversion module 303 is configured to convert the format of the image data according to the EDID.

[0074] The sending module 304 is configured to send the image data after the format conversion to the display screen for display.

[0075] In this embodiment, a signal converter is provided between the mainboard and the display screen, i.e., a data transmission device for the display system. The display screen EDID is different depending on the type of display screen or the manufacturer. The signal converter receives the image data sent by the mainboard and obtains the EDID of the display screen, so that the signal converter converts the format of the image data according to the EDID to adapt to the resolution supported by the display screen, so that the display screen can successfully display the image data sent by the mainboard and avoid damage to the mainboard and the display screen.

[0076] In the disclosed embodiment, a signal converter is provided between the mainboard and the display screen, so as to realize the conversion and transmission of data between the mainboard and the display screen, so that the display screen with mismatched specifications can correctly identify and display the image sent by the mainboard, so as to smoothly complete the inspection of the mainboard or simplify the assembly process of the display device, and at the same time, extend the service life of the mainboard and the display screen.

[0077] In some embodiments, the device further includes: a handshake signal sending module configured to send a handshake signal to the mainboard when a power-on signal is detected before receiving the image data sent by the mainboard.

[0078] The receiving module 301 is configured to receive image data when the handshake with the mainboard is successful.

[0079] In the disclosed embodiment, the mainboard mainly outputs VBO signals based on the VBO standard. In addition to image data, the VBO signal also includes a timing control signal embedded in the image data. The timing control signal may be unstable with probability, which may cause the signal converter to fail to convert the image data, and the display screen may not be able to display the image normally. Therefore, when receiving image data, the signal converter needs to send a handshake signal to the mainboard, and after determining that the handshake with the mainboard is successful and the mainboard stably sends the VBO signal, it receives the image data, thereby improving the transmission efficiency of the image data, avoiding image display failure caused by unstable data transmission, and reducing the error rate of mainboard detection.

[0080] In some embodiments, the device further includes: a control module configured to pull down the HTPDN signal before sending the handshake signal to the mainboard. The HTPDN signal is a detection flag, and the HTPDN signal is pulled down to record the detection start time, and the signal converter controls the handshake process according to the HTPDN signal.

[0081] In some embodiments, if the handshake time between the mainboard and the signal converter exceeds a set time, the handshake fails, thereby effectively preventing the handshake process from continuing to run and reducing the efficiency of image data transmission.

[0082] In some embodiments, the device further includes: a signal receiving module and a control module.

[0083] The signal receiving module is configured to receive the CDR signal sent by the mainboard.

[0084] The control module is configured to pull the LOCKN signal low when the CDR PLL is stable.

[0085] The receiving module 301 is configured to receive image data after the control module pulls the LOCKN signal low. When the CDR PLL is stable, the mainboard can stably send image data to the signal converter through the VBO interface. The signal converter starts to receive image data after pulling the LOCKN signal low and performs subsequent conversion operations, which increases the probability of the display screen successfully displaying the image, reduces the error rate of the mainboard detection, and improves the detection efficiency of the mainboard by the mainboard detection personnel.

[0086] In some embodiments, the conversion module 303 includes: a parsing unit, an adjustment unit, and a packaging unit.

[0087] A parsing unit, configured to parse the EDID to determine a resolution supported by the display screen;

[0088] an adjustment unit configured to adjust display parameters of the image data according to the resolution;

[0089] The encapsulation unit is configured to encapsulate the image data after the display parameters are adjusted according to the data transmission protocol supported by the display screen.

[0090] In some embodiments, when adjusting the display parameters of the image data according to the resolution, the adjustment is performed according to the highest resolution or the second highest resolution supported by the display screen, so that the display screen can correctly display the image while improving the clarity of the image display.

[0091] In some embodiments, the device further includes: a protocol acquisition unit configured to acquire a data transmission protocol supported by the display screen before converting the format of the image data according to the EDID.

[0092] In some embodiments, the adjustment unit includes: a parsing subunit and a conversion subunit.

[0093] The parsing subunit parses the image data to obtain DE, Hsync, Vsync and DATA.

[0094] The conversion subunit is configured to convert DE, Hsync, Vsync and DATA according to the resolution.

[0095] In some embodiments, a resolution information mapping table is stored in the signal converter. The resolution information mapping table is based on the mapping relationship between each standard resolution information and the corresponding standard Hsync frequency and standard Vsync frequency. Before the signal converter converts DE, Hsync, Vsync and DATA according to the resolution, it looks up the table to obtain the standard Hsync frequency and standard Vsync frequency corresponding to the resolution.

[0096] In some embodiments, the data transmission protocol supported by the display screen is the HDMI protocol. When converting DATA according to the resolution, the sampling mode of DATA is adjusted from YCbCr 4:2:0 to YCbCr4:2:2, the resolution is superimposed on YCbCr, and the sampling mode is adjusted according to the receiving state of the display end, for example: from YCbCr 4:2:2 to YCbCr 4:4:4 or from YCbCr 4:4:4 to YCbCr 4:2:2.

[0097] In some embodiments, the step further includes converting the sampling mode of DATA from YCbCr to RGB mode.

[0098] In some embodiments, after converting Hsync, Vsync and DATA according to the resolution, the signal converter adjusts DE to indicate that the format conversion of the image data is completed, and executes the operation of sending the image data to the display screen for display according to the change of DE.

[0099] The present disclosure also discloses a data transmission device for a display system, including a processor and a memory storing program instructions. The processor is configured to execute the data transmission method for a display system provided by any of the aforementioned embodiments when executing the program instructions.

[0100] The present disclosure also discloses a display system, including: a display screen configured to display images; a mainboard configured to send image data to the display screen; and a data transmission device for the display system provided in any of the aforementioned embodiments.

[0101] Figure 4 is a schematic diagram of a data transmission device for a display system provided in an embodiment of the present disclosure. In this embodiment, the data transmission device for a display system includes:

[0102] The processor 401 and the memory 402 may also include a communication interface 403 and a bus 404. The processor 401, the communication interface 403, and the memory 402 may communicate with each other through the bus 404. The communication interface 403 may be used for information transmission. The processor 401 may call the logic instructions in the memory 402 to execute the data transmission method for the display system provided in the above embodiment.

[0103] In addition, the logic instructions in the memory 402 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0104] The memory 402 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the methods in the embodiments of the present disclosure. The processor 401 executes functional applications and data processing by running the software programs, instructions, and modules stored in the memory 402, that is, implementing the methods in the above method embodiments.

[0105] The memory 402 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 402 may include a high-speed random access memory and may also include a non-volatile memory.

[0106] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the data transmission method for a display system provided in the above embodiment.

[0107] An embodiment of the present disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the data transmission method for a display system provided in the above embodiment.

[0108] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0109] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a ROM, (Read-Only Memory), a RAM (Random Access Memory), a disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0110] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, individual components and functions are optional, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of the present disclosure includes the entire scope of the claims, and all available equivalents of the claims. When used in this application, although the terms "first", "second", etc. may be used in this application to describe each element, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without changing the meaning of the description, the first element can be called the second element, and similarly, the second element can be called the first element, as long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first element and the second element are both elements, but may not be the same element. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates, the singular forms "a", "an" and "the" are intended to include the plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups of these. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method or device including the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0111] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. Technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. Technicians can clearly understand that for the convenience and simplicity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0112] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units can be only a logical function division, and there can be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0113] The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a part of a module, program segment or code, and a part of a module, program segment or code includes one or more executable instructions for realizing the specified logical function. In some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of special-purpose hardware and computer instructions.

Claims

1. A data transmission method for a display system, characterized in that: The data transmission method is applied to a signal converter, and the signal converter is connected to a mainboard and a display screen respectively; the data transmission method comprises: Receive image data sent by the mainboard; Get the extended display identification data EDID of the display; Parsing the EDID to determine the resolution supported by the display screen; Adjusting the display parameters of the image data according to the resolution; adjusting the display parameters of the image data according to the resolution, including: parsing the image data to obtain a strobe signal, a horizontal synchronization signal, a vertical synchronization signal and a data signal; converting the strobe signal, the horizontal synchronization signal, the vertical synchronization signal and the data signal according to the resolution; wherein converting the strobe signal, the horizontal synchronization signal, the vertical synchronization signal and the data signal according to the resolution includes: obtaining a standard horizontal synchronization signal frequency and a standard vertical synchronization signal frequency corresponding to the resolution in a resolution information mapping table, and adjusting a sampling mode of the data signal according to the resolution; the resolution information mapping table includes a mapping relationship between each standard resolution information and a corresponding standard horizontal synchronization signal frequency and a standard vertical synchronization signal frequency; after converting the horizontal synchronization signal, the vertical synchronization signal and the data signal according to the resolution, adjusting the strobe signal; Encapsulating the image data after adjusting the display parameters according to the data transmission protocol supported by the display screen; The packaged image data is sent to the display screen for display.

2. The method according to claim 1, characterized in that Before receiving the image data sent by the mainboard, it also includes: When a power-on signal is detected, a handshake signal is sent to the mainboard; When the handshake with the mainboard is successful, the image data is received.

3. The method according to claim 2, characterized in that Before sending the handshake signal to the main board, the method further includes: Pull the hot plug detection control pin HTPDN signal low.

4. The method according to claim 2, characterized in that: The handshake with the mainboard is successful, including: Receiving a clock data recovery (CDR) signal sent by the mainboard; When the clock data recovery phase-locked loop CDR PLL is stable, the clock lock LOCKN signal is pulled low.

5. The method according to any one of claims 1 to 4, characterized in that: Before converting the format of the image data according to the EDID, the method further includes: Get the data transmission protocol supported by the display screen.

6. A data transmission device for a display system, comprising: A receiving module, configured to receive image data sent by the mainboard; An acquisition module is configured to acquire the EDID of the display screen; A parsing unit, configured to parse the EDID to determine a resolution supported by the display screen; The adjusting unit is configured to adjust the display parameters of the image data according to the resolution; the adjusting unit includes: a parsing subunit, configured to parse the image data to obtain a strobe signal, a horizontal synchronization signal, a vertical synchronization signal and a data signal; a converting subunit, configured to convert the strobe signal, the horizontal synchronization signal, the vertical synchronization signal and the data signal according to the resolution; wherein converting the strobe signal, the horizontal synchronization signal, the vertical synchronization signal and the data signal according to the resolution includes: obtaining a standard horizontal synchronization signal frequency and a standard vertical synchronization signal frequency corresponding to the resolution in a resolution information mapping table, and adjusting a sampling mode of the data signal according to the resolution; the resolution information mapping table includes a mapping relationship between each standard resolution information and a corresponding standard horizontal synchronization signal frequency and a standard vertical synchronization signal frequency; after converting the horizontal synchronization signal, the vertical synchronization signal and the data signal according to the resolution, adjusting the strobe signal; A packaging unit, configured to package the image data after adjusting the display parameters according to a data transmission protocol supported by the display screen; The sending module is configured to send the packaged image data to the display screen for display.

7. A data transmission device for a display system, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the data transmission method for a display system according to any one of claims 1 to 5 when executing the program instructions.

8. A display system, characterized in that: include: a display screen configured to display an image; a main board configured to send image data to a display screen; and, A data transmission device as claimed in claim 6 or 7.

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