CN112702553A - Display system, data transmission method thereof and data transmission device - Google Patents
Display system, data transmission method thereof and data transmission device Download PDFInfo
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- H—ELECTRICITY
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- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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Abstract
The application relates to the technical field of signal processing, and discloses a data transmission method for a display system, which comprises the following steps: receiving image data sent by a main board; acquiring extended display identification data EDID of a display screen; and converting the format of the image data according to the EDID, and sending the image data to the display screen for displaying. In this embodiment of the disclosure, set up signal converter between mainboard and display screen, realized the conversion and the transmission of data between mainboard and the display screen for the unmatched display screen of specification can correctly discern and show the image that the mainboard sent, in order to accomplish the inspection to the mainboard smoothly or simplify display device's assembly process, simultaneously, has prolonged the life of mainboard and display screen.
Description
Technical Field
The present application relates to the technical field of signal processing, and for example, to a display system, a data transmission method thereof, and a data transmission apparatus thereof.
Background
At present, before a television main board leaves a factory, the display screen with a corresponding specification is connected with the main board so as to detect and confirm whether the main board is normal or not. Based on current detection scheme, need the display screen of different specifications of purchase in advance of TV mainboard processing factory, need strictly connect display screen and mainboard according to corresponding rule in the mainboard inspection process, and the mainboard is dispatched from the factory the back, needs and the display screen cooperation that corresponds to use.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: in the mainboard inspection and use process, the display screen of connecting has the mistake with the mainboard specification, causes the damage of mainboard or display screen easily.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a display system, a data transmission method and a data transmission device thereof, which are used for solving the technical problem that a mainboard or a display screen is damaged when the specifications of the mainboard and the display screen are not matched.
In some embodiments, a data transmission method for a display system includes:
receiving image data sent by a main board;
acquiring EDID (Extended Display Identification Data) of a Display screen;
and converting the format of the image data according to the EDID, and sending the image data to the display screen for displaying.
In some embodiments, a data transmission apparatus for a display system includes:
the receiving module is configured to receive the image data sent by the main board;
the acquisition module is configured to acquire the EDID of the display screen;
a conversion module configured to convert a format of the image data according to the EDID;
and the sending module is configured to send the image data after the format conversion to the display screen for displaying.
In some embodiments, a data transmission apparatus for a display system includes a processor and a memory storing program instructions, the processor being configured to execute the aforementioned data transmission method for a display system when executing the program instructions.
In some embodiments, a display system, comprises:
a display screen configured to display an image;
the main board is configured to send image data to be displayed to the display screen; and the combination of (a) and (b),
any of the foregoing data transmission devices.
The display system and the data transmission method and device thereof provided by the embodiment of the disclosure can achieve the following technical effects:
set up signal converter between mainboard and display screen, realized the conversion and the transmission of data between mainboard and the display screen for the unmatched display screen of specification can correctly discern and show the image that the mainboard sent, with accomplish the inspection to the mainboard smoothly or simplify display device's assembly process, simultaneously, prolonged the life of mainboard and display screen.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated in drawings corresponding to, and not limiting to, embodiments in which elements having the same reference number designation are illustrated as similar elements and in which:
fig. 1 is a schematic flowchart of a data transmission method for a display system according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart of a data transmission method for a display system according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a data transmission device for a display system according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a data transmission device for a display system according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The display screen in the embodiment of the disclosure is a 4K display screen. With the improvement of the requirement of users on the definition of video image quality, the ultra-high definition television obtains a wide consumption group. In the related technology, a standard interface between a mainboard of the ultra-high definition television and a 4K screen video signal is a high-speed serial interface V-by-One interface. VBO interface for short. The display signal output by the mainboard from the V-by-One interface is required to be connected to the ultra-high screen clearance provided with the VBO interface, and then a display picture can be seen. If the interface specification between the main board and the display screen is inconsistent, the picture cannot be displayed, and even the main board or the display screen is easily damaged. The conventional interfaces of the 4K display screen are DVI, VGA, HDMI and the like, and for a user needing to upgrade the mainboard, the user cannot normally display pictures after purchasing the ultra-high definition television mainboard, so that great inconvenience is brought to the user. The display provided by the embodiment of the disclosure is provided with the signal converter between the mainboard and the display screen, so that the data conversion and transmission between the mainboard and the display screen are realized, and the adaptation degree between the mainboard and the display screen is improved.
Fig. 1 is a data transmission method for a display system according to an embodiment of the present disclosure, where the method includes:
and step S101, receiving the image data sent by the mainboard.
And S102, acquiring the EDID of the display screen.
And step S103, converting the format of the image data according to the EDID, and sending the image data to a display screen for displaying.
In this embodiment, a signal converter is disposed between the main board and the display screen. The display EDID is different according to the type of the display or the manufacturer. The signal converter receives the image data sent by the main board and obtains the EDID of the display screen, so that the signal converter can convert the format of the image data according to the EDID in step S103 to adapt to the resolution supported by the display screen, the display screen can successfully display the image data sent by the main board, and the damage to the main board and the display screen is avoided.
In some embodiments, the EDID of the display screen includes a plurality of types, for example: EDID of a display screen includes 1280 × 600, 1280 × 720, 1280 × 1024, and 1440 × 900. EDID of B display includes 1366 × 768, 1920 × 1080, and 3840 × 2160.
In step S103, when the format of the image data is converted according to the EDID of the display screen, optionally, the highest resolution or the next highest resolution is selected from the EDID of the display screen for conversion, so as to enhance the display effect and improve the user experience. For example: when the format of the image data is converted according to the EDID of the a display screen, 1440 × 900 or 1280 × 1024 is selected for conversion. When the format of the image data is converted according to the EDID of the B display screen, 3840 × 2160 or 1920 × 1080 is selected for conversion
In step S103, the protocol for transmitting image data between the display screen and the signal converter is different according to the type of the image input interface of the display screen. Therefore, after the format of the image data is converted according to the EDID, the signal converter packages the image data into a format which can be identified by the display screen and sends the image data to the display screen for displaying.
In this embodiment of the disclosure, set up signal converter between mainboard and display screen, realized the conversion and the transmission of data between mainboard and the display screen for the unmatched display screen of specification can correctly discern and show the image that the mainboard sent, in order to accomplish the inspection to the mainboard smoothly or simplify display device's assembly process, simultaneously, has prolonged the life of mainboard and display screen.
In some embodiments, before receiving the image data sent by the motherboard in step S101, the method further includes:
when a starting-up signal is detected, sending a handshake signal to the mainboard;
and when the handshake with the mainboard is successful, receiving the image data.
In the embodiment of the disclosure, the main board mainly outputs the VBO signal based on the VBO standard. The VBO signal includes a timing control signal embedded in the image data in addition to the image data, and the timing control signal may be probabilistically unstable, which may cause the signal converter to fail to convert the image data, and the display screen may not normally display the image. Therefore, the signal converter receives the image data when receiving the image data and needing to send a handshake signal to the mainboard, the success of handshake with the mainboard is determined, and the image data is received under the condition that the mainboard stably sends the VBO signal, so that the transmission efficiency of the image data is improved, the image display failure caused by unstable data transmission is avoided, and the fault rate of mainboard detection is reduced.
In some embodiments, the motherboard outputs LVDS based on LVDS (Low-Voltage Differential Signaling) protocol. LVDS includes a timing control signal embedded in image data in addition to the image data.
In some embodiments, before sending the handshake signal to the motherboard, the method further includes: the HTPDN (Hot Plug Detect Signal, Hot Plug Detect control pin) Signal is pulled low. The HTPDN signal is a detection zone bit, the HTPDN signal is pulled down to record the detection start time, and the signal converter realizes the control of the handshake process according to the HTPDN signal.
In some embodiments, if the handshake duration of the motherboard and the signal converter exceeds the set duration, the handshake fails, and the image data transmission efficiency is effectively prevented from being reduced due to continuous operation of the handshake process.
In some embodiments, the successful handshake with the motherboard includes:
receiving a Clock Data Recovery (CDR) signal sent by a mainboard;
when a CDR PLL (clock data recovery phase lock loop) is stable, the clock lock LOCKN signal is pulled low. When CDR PLL is stable, mark the mainboard and can stabilize and send image data to signal converter through the VBO interface, signal converter begins to receive image data after drawing low the LOCKN signal to carry out subsequent conversion operation, improved the probability that the display screen successfully shows the image, reduced the fault rate that the mainboard detected, improve the detection efficiency of mainboard measurement personnel to the mainboard.
Fig. 2 is a data transmission method for a display system according to an embodiment of the present disclosure, where the method includes:
step S201, when the power-on signal is detected, pulling down the hot-plug detection control pin HTPDN signal, and sending a handshake signal to the motherboard.
Step S202, when the clock data recovery phase-locked loop CDR PLL is stable, pulls down the clock lock LOCKN signal.
And step S101, receiving the image data sent by the mainboard.
And S102, acquiring the EDID of the display screen.
And step S103, converting the format of the image data according to the EDID, and sending the image data to a display screen for displaying.
In this embodiment of the disclosure, set up signal converter between mainboard and display screen, realized the conversion and the transmission of data between mainboard and the display screen for the unmatched display screen of specification can correctly discern and show the image that the mainboard sent, in order to accomplish the inspection to the mainboard smoothly or simplify display device's assembly process, simultaneously, has prolonged the life of mainboard and display screen.
In some embodiments, converting the format of the image data according to the EDID in step S103 includes:
analyzing the EDID and determining the resolution supported by the display screen;
adjusting display parameters of the image data according to the resolution;
and packaging the image data after the display parameters are adjusted according to a data transmission protocol supported by the display screen.
In some embodiments, when the display parameter of the image data is adjusted 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 and improve the definition of the image display.
In some embodiments, the data transmission protocol supported by the display screen is determined according to the interface provided by the display screen. Optionally, the Interface of the display screen is an HDMI (High Definition Multimedia Interface), and the data transmission protocol supported by the display screen is an HDMI protocol. Optionally, the interface of the display screen is a VGA (Video Graphics Array, Video transmission standard) interface, and the data transmission protocol supported by the display screen is a VGA protocol. Optionally, the Interface of the display screen is a DVI (Digital Visual Interface), and the data transmission protocol supported by the display screen is a DVI protocol.
In some embodiments, before converting the format of the image data according to the EDID, the method further includes: and acquiring a data transmission protocol supported by the display screen.
In some embodiments, adjusting display parameters of the image data according to the resolution comprises:
analyzing the image DATA to obtain a gate signal DE, a horizontal synchronizing signal Hsync, a vertical synchronizing signal Vsync and a DATA signal DATA;
DE, Hsync, Vsync, and DATA are converted according to the resolution.
In some embodiments, a resolution information mapping table is stored in the signal converter. The resolution information mapping table is used for mapping each standard resolution information with the corresponding standard Hsync frequency and standard Vsync frequency. Before the signal converter converts DE, Hsync, Vsync and DATA according to the resolution, a table is looked up to obtain a standard Hsync frequency and a standard Vsync frequency corresponding to the resolution.
In some embodiments, the data transfer protocol supported by the display screen is the HDMI protocol. When converting DATA according to resolution, the sampling mode of DATA is changed from YCbCr 4: 2: 0 is adjusted to YCbCr 4: 2: and 2, superposing the resolution into YCbCr, and adjusting the sampling mode according to the receiving state of the display terminal, such as: the molecular weight distribution of the compound is represented by YCbCr 4: 2: 2, adjusting to YCbCr 4: 4: 4 or a mixture of YCbCr 4: 4: 4, adjusting to YCbCr 4: 2: 2.
in some embodiments, converting the sampling pattern of DATA from YCbCr to RGB pattern is also included.
In some embodiments, the signal converter adjusts DE after converting Hsync, Vsync, and DATA according to the resolution, marks the completion of format conversion of the image DATA, and performs an operation of sending the image DATA to the display screen for display according to a change in DE.
Fig. 3 is a data transmission device for a display system according to an embodiment of the present disclosure, and the data transmission device includes:
a receiving module 301 configured to receive the image data sent by the main board.
An obtaining module 302 configured to obtain the EDID of the display screen.
A conversion module 303 configured to convert the format of the image data according to the EDID.
And the sending module 304 is configured to send the image data after the format conversion to a display screen for displaying.
In this embodiment, a signal converter, i.e., a data transmission device for a display system, is disposed between the main board and the display screen. The display EDID is different according to the type of the display 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 can convert the format of the image data according to the EDID to adapt to the resolution supported by the display screen, the display screen can successfully display the image data sent by the mainboard, and the damage to the mainboard and the display screen is avoided.
In this embodiment of the disclosure, set up signal converter between mainboard and display screen, realized the conversion and the transmission of data between mainboard and the display screen for the unmatched display screen of specification can correctly discern and show the image that the mainboard sent, in order to accomplish the inspection to the mainboard smoothly or simplify display device's assembly process, simultaneously, has prolonged the life of mainboard and display screen.
In some embodiments, the apparatus further comprises: and the handshake signal sending module is configured to send a handshake signal to the mainboard when a startup signal is detected before receiving the image data sent by the mainboard.
The receiving module 301 is configured to receive the image data when the handshake with the motherboard is successful.
In the embodiment of the disclosure, the main board mainly outputs the VBO signal based on the VBO standard. The VBO signal includes a timing control signal embedded in the image data in addition to the image data, and the timing control signal may be probabilistically unstable, which may cause the signal converter to fail to convert the image data, and the display screen may not normally display the image. Therefore, the signal converter receives the image data when receiving the image data and needing to send a handshake signal to the mainboard, the success of handshake with the mainboard is determined, and the image data is received under the condition that the mainboard stably sends the VBO signal, so that the transmission efficiency of the image data is improved, the image display failure caused by unstable data transmission is avoided, and the fault rate of mainboard detection is reduced.
In some embodiments, the apparatus further comprises: and the control module is configured to pull down the HTPDN signal before sending the handshake signal to the mainboard. The HTPDN signal is a detection zone bit, the HTPDN signal is pulled down to record the detection start time, and the signal converter realizes the control of the handshake process according to the HTPDN signal.
In some embodiments, if the handshake duration of the motherboard and the signal converter exceeds the set duration, the handshake fails, and the image data transmission efficiency is effectively prevented from being reduced due to continuous operation of the handshake process.
In some embodiments, the apparatus further comprises: the device comprises a signal receiving module and a control module.
And the signal receiving module is configured to receive the CDR signal sent by the main board.
A control module configured to pull the LOCKN signal low when the CDR PLL is stable.
The receiving module 301 is configured to receive the image data after the control module pulls down the LOCKN signal. When CDR PLL is stable, mark the mainboard and can stabilize and send image data to signal converter through the VBO interface, signal converter begins to receive image data after drawing low the LOCKN signal to carry out subsequent conversion operation, improved the probability that the display screen successfully shows the image, reduced the fault rate that the mainboard detected, improve the detection efficiency of mainboard measurement personnel to the mainboard.
In some embodiments, the conversion module 303 comprises: the device comprises an analysis unit, an adjustment unit and a packaging unit.
The analysis unit is configured to analyze the EDID and determine the resolution supported by the display screen;
an adjustment unit configured to adjust a display parameter of the image data according to the resolution;
and the packaging unit is configured to package the image data after the display parameters are adjusted according to a data transmission protocol supported by the display screen.
In some embodiments, when the display parameter of the image data is adjusted 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 and improve the definition of the image display.
In some embodiments, the apparatus further comprises: and the protocol acquisition unit is configured to acquire the data transmission protocol supported by the display screen before the format of the image data is converted according to the EDID.
In some embodiments, the adjusting unit comprises: a parsing subunit and a conversion subunit.
And the analysis subunit analyzes the image DATA to obtain DE, Hsync, Vsync and DATA.
A conversion subunit configured to convert DE, Hsync, Vsync, and DATA according to the resolution.
In some embodiments, a resolution information mapping table is stored in the signal converter. The resolution information mapping table is used for mapping each standard resolution information with the corresponding standard Hsync frequency and standard Vsync frequency. Before the signal converter converts DE, Hsync, Vsync and DATA according to the resolution, a table is looked up to obtain a standard Hsync frequency and a standard Vsync frequency corresponding to the resolution.
In some embodiments, the data transfer protocol supported by the display screen is the HDMI protocol. When converting DATA according to resolution, the sampling mode of DATA is changed from YCbCr 4: 2: 0 is adjusted to YCbCr 4: 2: and 2, superposing the resolution into YCbCr, and adjusting the sampling mode according to the receiving state of the display terminal, such as: the molecular weight distribution of the compound is represented by YCbCr 4: 2: 2, adjusting to YCbCr 4: 4: 4 or a mixture of YCbCr 4: 4: 4, adjusting to YCbCr 4: 2: 2.
in some embodiments, converting the sampling pattern of DATA from YCbCr to RGB pattern is also included.
In some embodiments, the signal converter adjusts DE after converting Hsync, Vsync, and DATA according to the resolution, marks the completion of format conversion of the image DATA, and performs an operation of sending the image DATA to the display screen for display according to a change in DE.
The data transmission device for the display system comprises a processor and a memory, wherein the memory stores program instructions, and the processor is configured to execute the data transmission method for the display system provided by any one of the previous embodiments when executing the program instructions.
The embodiment of the present disclosure further discloses a display system, including: a display screen configured to display an image; a main board configured to transmit image data to a display screen; and, any preceding embodiment provides a data transmission device for a display system.
Fig. 4 is a schematic diagram of a data transmission device for a display system according to an embodiment of the present disclosure. In this embodiment, the data transmission apparatus for a display system includes:
a processor (processor)401 and a memory (memory)402, and may further 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 via a bus 404. The communication interface 403 may be used for information transfer. The processor 401 may call logic instructions in the memory 402 to perform the data transmission method for the display system provided by the above-described embodiment.
Furthermore, the logic instructions in the memory 402 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product.
The memory 402 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 401 executes the functional application and data processing by executing the software program, instructions and modules stored in the memory 402, that is, implements the method in the above-described method embodiments.
The memory 402 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 402 may include high speed random access memory and may also include non-volatile memory.
The embodiment of the disclosure provides a computer-readable storage medium, which stores computer-executable instructions configured to execute the data transmission method for a display system provided by the above-mentioned embodiment.
The embodiment of the present disclosure provides a computer program product including a computer program stored on a computer-readable storage medium, the computer program including program instructions, which, when executed by a computer, cause the computer to execute the data transmission method for a display system provided by the above-mentioned embodiment.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method in the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: various media capable of storing program codes, such as a usb disk, a removable hard disk, a ROM, (Read-Only Memory), a RAM (Random Access Memory), a magnetic disk, or an optical disk, may also be transient storage media.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the disclosed embodiments includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first and second elements are both elements, but may not be the same element. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method or device comprising the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would 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 may depend upon the particular application and design constraints imposed on the solution. 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 disclosed embodiments. It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit may be merely a division of a logical function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. 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 implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A data transmission method for a display system, comprising:
receiving image data sent by a main board;
acquiring extended display identification data EDID of a display screen;
and converting the format of the image data according to the EDID, and sending the image data to the display screen for displaying.
2. The method of claim 1, wherein before receiving the image data sent by the motherboard, the method further comprises:
when a starting-up signal is detected, sending a handshake signal to the mainboard;
and when the handshake with the mainboard is successful, receiving the image data.
3. The method of claim 2, wherein before sending the handshake signals to the motherboard, further comprising:
and pulling down the HTPDN signal of the hot plug detection control pin.
4. The method of claim 2, wherein the successful handshake with the motherboard comprises:
receiving a clock data recovery CDR signal sent by the mainboard;
and when the clock data recovery phase-locked loop CDR PLL is stable, pulling down the clock locking LOCKN signal.
5. The method according to any one of claims 1 to 4, wherein converting the format of the image data according to the EDID includes:
analyzing the EDID and determining the resolution supported by the display screen;
adjusting display parameters of the image data according to the resolution;
and packaging the image data after the display parameters are adjusted according to the data transmission protocol supported by the display screen.
6. The method of claim 5, wherein adjusting display parameters of the image data according to the resolution comprises:
analyzing the image data to obtain a gating signal, a horizontal synchronous signal, a vertical synchronous signal and a data signal;
and converting the gating signal, the horizontal synchronous signal, the vertical synchronous signal and the data signal according to the resolution.
7. The method according to claim 5, before converting the format of the image data according to the EDID, further comprising:
and acquiring a data transmission protocol supported by the display screen.
8. A data transmission apparatus for a display system, comprising:
the receiving module is configured to receive the image data sent by the main board;
the acquisition module is configured to acquire the EDID of the display screen;
a conversion module configured to convert a format of the image data according to the EDID;
and the sending module is configured to send the image data after the format conversion to the display screen for displaying.
9. A data transmission apparatus for a display system comprising a processor and a memory having stored thereon program instructions, wherein the processor is configured to carry out the data transmission method for a display system according to any one of claims 1 to 7 when executing the program instructions.
10. A display system, comprising:
a display screen configured to display an image;
a main board configured to transmit image data to a display screen; and the combination of (a) and (b),
a data transmission arrangement as claimed in claim 8 or 9.
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