CN111063285A - Display control system and display unit board - Google Patents

Display control system and display unit board Download PDF

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Publication number
CN111063285A
CN111063285A CN201811210302.6A CN201811210302A CN111063285A CN 111063285 A CN111063285 A CN 111063285A CN 201811210302 A CN201811210302 A CN 201811210302A CN 111063285 A CN111063285 A CN 111063285A
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data
serial
display
display control
encrypted
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CN201811210302.6A
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CN111063285B (en
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韦桂锋
王志刚
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Xian Novastar Electronic Technology Co Ltd
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Xian Novastar Electronic Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

The embodiment of the invention relates to a display control system, wherein a display control card comprises: the programmable device is used for carrying out serialization and encryption processing on a plurality of groups of display data and display control signals to obtain one path or a plurality of paths of encrypted serial data; and the first serial transmission interface is connected with the programmable device and used for outputting the encrypted serial data of the appointed path. The display unit panel includes: the second serial transmission interface is connected with the first serial transmission interface through a serial transmission channel; a display driving circuit; and the receiving end processor is connected with the second serial transmission interface and the display driving circuit and is used for receiving the encrypted serial data of the appointed path through the second serial transmission interface, decrypting and merging the encrypted serial data to convert the encrypted serial data into a plurality of groups of parallel display data and display control signals and transmitting the display data and the display control signals to the display driving circuit to drive and control the plurality of pixel units.

Description

Display control system and display unit board
Technical Field
The invention relates to the technical field of display, in particular to a display control system and a display unit board.
Background
In the prior art, a scanning card is used for pointing a screen, and a screen pointing signal is a parallel driving signal and is used for driving a display unit board of a display screen. If the existing scanning card outputs 32 groups of data groups, at least 105 transmission lines with TTL level are connected with the display unit board. For the intelligent module, the UART serial port of the TX/RX is used for transmission. Due to the fact that the number of the wires is large, the size of the current PCB layout cannot be too small, meanwhile, the number of the wires is large, and the system maintenance and the system stability are unreliable, and the limitation of the crosstalk of the TTL level and the EMC (Electro Magnetic Compatibility) performance on hardware cannot be effectively solved and improved. How to reduce the number of wire harnesses, improve the bandwidth utilization rate, improve the stability and the interference immunity of signals, and improve the EMC performance to make the system more stable is a technical problem to be solved urgently at present.
Disclosure of Invention
Embodiments of the present invention provide a display control system and a display unit board, which can reduce the number of transmission signal lines, improve the stability and anti-interference of signals, and improve the EMC performance and/or bandwidth utilization.
Specifically, an embodiment of the present invention provides a display control system, including: display control card and display element board. Wherein, the display control card includes: the programmable device is used for carrying out serialization and encryption processing on a plurality of groups of display data and display control signals to obtain one path or a plurality of paths of encrypted serial data; and the first serial transmission interface is connected with the programmable device and is used for outputting the specified path of encrypted serial data in the one or more paths of encrypted serial data. The display unit panel includes: the second serial transmission interface is connected with the first serial transmission interface through a serial transmission channel; a display driving circuit; the receiving end processor is connected with the second serial transmission interface and the display driving circuit and is used for receiving the encrypted serial data of the appointed route through the second serial transmission interface, decrypting and merging the encrypted serial data of the appointed route so as to convert the encrypted serial data into a plurality of groups of parallel display data and display control signals and transmitting the display data and the display control signals to the display driving circuit; and the display driving circuit is used for driving and controlling the plurality of pixel units according to the parallel groups of display data and display control signals.
In one embodiment of the invention, the programmable device comprises: the data input module is used for receiving input image data; the image processing module is used for carrying out image processing on the input image data to obtain the multiple groups of display data and generating the display control signals; the serialization processing module is used for carrying out serialization processing on the multiple groups of display data and the display control signals to obtain one or more paths of serial data; the encryption module is used for respectively encrypting the one-way or multi-way serial data to obtain the one-way or multi-way encrypted serial data; and the data output module is used for outputting one path of encrypted serial data in the one path or the plurality of paths of encrypted serial data to the first serial transmission interface as the appointed path of encrypted serial data.
In one embodiment of the present invention, the receiving-end processor includes: the receiving module is used for receiving the serial data encrypted by the appointed route from the second serial transmission interface; the decryption module is used for decrypting the specified encrypted serial data to obtain decrypted serial data; the parallel processing module is used for carrying out parallel processing on the decrypted serial data so as to convert the decrypted serial data into a plurality of groups of parallel display data and display control signals; and the output module is used for outputting the parallel groups of display data and display control signals to the display driving circuit.
In an embodiment of the present invention, the display unit board further includes an intelligent module, and the intelligent module is connected to the second serial transmission interface via the receiving end processor; the serial transmission channel is positioned in the single cable and is a bidirectional serial transmission channel, and the intelligent module is used for performing data interaction with the programmable device of the display control card through the bidirectional serial transmission channel at a gap of forward transmission of the encrypted serial data of the specified channel output by the first serial transmission interface.
In one embodiment of the present invention, the receiving-end processor includes: a receiving module for receiving the lane-specific encrypted serial data from the second serial transmission interface and for receiving second encrypted serial data from the second serial transmission interface; the decryption module is used for decrypting the encrypted serial data of the specified path to obtain decrypted serial data and decrypting the second encrypted serial data to obtain second decrypted serial data; the parallel processing module is used for carrying out parallel processing on the decrypted serial data so as to convert the decrypted serial data into a plurality of groups of parallel display data and display control signals; the output module is used for outputting the parallel groups of display data and display control signals to the display driving circuit; the second encryption module is used for encrypting the single-ended signal data output by the intelligent module to obtain encrypted single-ended signal data; and the signal conversion module is connected with the decryption module and the second encryption module, and is used for converting the second decrypted serial data into single-ended signal data and outputting the single-ended signal data to the intelligent module, and converting the encrypted single-ended signal data into serial differential signal data and transmitting the serial differential signal data to the second serial transmission interface.
In one embodiment of the invention, the gap of the forward transmission comprises a black field time slot in the specified path of encrypted serial data output by the first serial transmission interface.
In an embodiment of the present invention, the display unit board further includes an intelligent module, and the intelligent module is connected to the second serial transmission interface; the serial transmission channel is positioned in the single cable and comprises a one-way serial transmission channel and a two-way serial transmission channel, the one-way serial transmission channel is used for transmitting the encrypted serial data of the appointed path to the display unit board, and the two-way serial transmission channel is used for data interaction between the intelligent module and the programmable device of the display control card.
In one embodiment of the present invention, the display unit panel further includes: and the level shifter is connected between the receiving end processor and the display driving circuit and is used for performing level shifting so as to output TTL level signals to the display driving circuit.
In an embodiment of the present invention, the display control card includes an adapter card and a scan card, the adapter card is provided with a connector, the scan card is fixed on the adapter card through the connector, the programmable device is arranged on the scan card, and the first serial transmission interface is arranged on the adapter card and connected to the connector; the adapter card further comprises a communication module, and the communication module is connected with the connecting piece and used for receiving input image data and sending the image data to the programmable device arranged on the scanning card through the connecting piece.
In one embodiment of the present invention, the display unit board further comprises a serial cascade interface; the serial cascade interface is connected with the receiving end processor, so that the receiving end processor is connected between the second serial transmission interface and the serial cascade interface; the receiving end processor is specifically configured to decrypt and parallel the encrypted serial data to convert the encrypted serial data into the parallel sets of display data and display control signals to be transmitted to the display driving circuit when the received encrypted serial data of the designated line belongs to the display unit board, and forward the encrypted serial data to the serial cascade interface when the received encrypted serial data of the designated line does not belong to the display unit board.
In one embodiment of the present invention, the receiving-end processor includes: the receiving module is used for receiving the serial data encrypted by the appointed route from the second serial transmission interface; the judging module is used for judging whether the received encrypted serial data of the specified route belongs to the display unit board; the decryption module is used for decrypting the encrypted serial data of the appointed path to obtain decrypted serial data when the received encrypted serial data of the appointed path belongs to the display unit board; the parallel processing module is used for carrying out parallel processing on the decrypted serial data so as to convert the decrypted serial data into a plurality of groups of parallel display data and display control signals; the output module is used for outputting the parallel groups of display data and display control signals to the display driving circuit; and the forwarding module is used for forwarding the encrypted serial data of the specified path to the serial cascade interface when the received encrypted serial data of the specified path does not belong to the display unit board.
In addition, an embodiment of the present invention provides a display unit panel, including: the serial transmission interface is a single-channel or multi-channel serial differential signal interface; a display driving circuit; the receiving end processor is connected with the serial transmission interface and the display driving circuit and is used for receiving input encrypted serial data through the serial transmission interface, decrypting and parallelizing the encrypted serial data to convert the encrypted serial data into a plurality of groups of parallel display data and display control signals and transmitting the display data and the display control signals to the display driving circuit; and the plurality of pixel units are connected with the display driving circuit, each pixel unit comprises at least one light-emitting element, and the display driving circuit is used for driving and controlling the plurality of pixel units according to the parallel groups of display data and display control signals.
In an embodiment of the present invention, the display unit board further includes an intelligent module, and the intelligent module is connected to the serial transmission interface through the receiving end processor; the intelligent module shares a single serial differential transmission channel of the serial transmission interface with the input encrypted serial data in a time division multiplexing mode through the receiving end processor and the intelligent module data output by the serial transmission interface.
In an embodiment of the present invention, the display unit board further includes an intelligent module, and the intelligent module is connected to the serial transmission interface; the intelligent module respectively uses two serial differential transmission channels in the serial transmission interface through intelligent module data output by the serial transmission interface and the input encrypted serial data.
In one embodiment of the present invention, the display unit board further comprises a serial cascade interface; the serial cascade interface is connected with the receiving end processor, so that the receiving end processor is connected between the serial transmission interface and the serial cascade interface; the receiving end processor is specifically configured to decrypt and parallel the encrypted serial data to convert the encrypted serial data into the parallel sets of display data and display control signals to be transmitted to the display driving circuit when the received encrypted serial data of the designated route belongs to the display unit board, and forward the encrypted serial data of the designated route to the serial cascade interface when the received encrypted serial data of the designated route does not belong to the display unit board.
The above technical solution may have one or more of the following advantages: through the redesign of the display control card and the display unit board, for example, through software programming, the programmable device on the display control card has a serialized encryption function and/or a receiving end processor is additionally arranged on the display unit board, and the receiving end processor and the display unit board are connected by adopting a serial transmission channel, so that the number of transmission signal lines can be reduced, the stability and the anti-interference performance of signals can be improved, and the EMC performance and/or the bandwidth utilization rate can be improved. When the receiving end processor is a custom IC, the data processing capability can be customized, thereby simplifying the structure of the display unit board. Moreover, the intelligent module is connected to the receiving end processor, so that the interaction between the display control card and the display unit board can be completed through a single serial transmission channel; or, connect the intelligent module to the second serial transmission interface, the interaction between display control card and the display unit board can be accomplished by a one-way serial transmission channel and a two-way serial transmission channel that are in same cable, is favorable to interactive concurrency like this. In addition, by setting the serial cascade interface, the display control system according to the embodiment of the present invention may cascade a plurality of display unit boards, and then display an image by using the display unit boards together.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention, 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 schematic structural diagram of a display control system according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of the programmable device of FIG. 1;
FIG. 3a is a schematic diagram of the receiving processor shown in FIG. 1;
FIG. 3b is a schematic diagram illustrating data interaction between the display control card and the display unit board;
FIG. 4 is a diagram illustrating a structure of a display control card according to a second embodiment of the present invention;
FIG. 5 is a schematic structural diagram of the communication module shown in FIG. 4;
FIG. 6 is a schematic structural diagram of a display control system according to a third embodiment of the present invention;
FIG. 7 is a schematic diagram of the structure of the programmable device of FIG. 6;
FIG. 8 is a block diagram of the receiver processor shown in FIG. 6;
FIG. 9 is a schematic structural diagram of a display control system according to another embodiment of the present invention;
FIG. 10 is a diagram illustrating a structure of a display control card according to a fourth embodiment of the present invention;
FIG. 11 is a diagram illustrating a display control system according to a fifth embodiment of the present invention;
FIG. 12 is a diagram illustrating a display control system according to a sixth embodiment of the present invention;
FIG. 13 is a schematic diagram of a specific structure of the programmable device in FIG. 12;
FIG. 14 is a schematic diagram of a specific structure of the receiving-end processor in FIG. 12;
fig. 15 is a schematic structural diagram of a display unit board according to a seventh embodiment of the invention.
[ description of main element symbols ]:
10. 30, 50, 60: display control system
110. 210, 310, 410, 510, 610: display control card
120. 320, 520, 620, 640, 720: display unit board
130. 330, 530, 630, 650: serial transmission channel
111. 211, 311, 411, 511, 611: programmable device
113. 121, 213, 313, 321, 413, 513, 521, 613, 621, 641, 721: serial transmission interface
122. 322, 522, 622, 642, 722: receiving end processor
123. 323, 523, 623, 643, 723: display driving circuit
124. 324, 524, 624, 644, 724: pixel unit
1241. 3241, 5241, 6241, 6441, 7241: light emitting element
125. 627, 727: intelligent module
1111. 3111, 6111: data input module
1112. 3112, 6112: image processing module
1113. 3113, 6113: serialization processing module
1114. 3114, 6114: encryption module
1115. 3115, 6115: data output module
1221. 3221, 6221: receiving module
1222. 3222, 6223: decryption module
1223. 3223, 6224: parallel processing module
1224. 3224, 6225: output module
1225: signal conversion module
1226: encryption module
215. 415, 615: scanning card
217. 417, 614: switching card
218. 418: communication module
219. 419, 619: connecting piece
218 a: network transformer
218 b: net mouth
325. 726: level shifter
525. 625, 725: serial cascade interface
6222: judging module
6226: forwarding module
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First embodiment
Fig. 1 is a schematic structural diagram of a display control system 10 according to a first embodiment of the present invention. As shown in fig. 1, the display control system 10 includes: a display control card 110 and a display unit board 120, wherein the display control card 110 includes, for example, a programmable device 111 and a serial transmission interface 113. The programmable device 111 performs image processing on input image data to obtain a plurality of sets of display data and locally generate a display control signal, for example, through internal arithmetic logic, and performs compression encoding processing such as serialization and encryption processing on the plurality of sets of display data and display control signal to obtain one or more encrypted serial data for output. For example, the programmable device 111 may serialize and encrypt every 4 sets of display data and corresponding display control signals into one encrypted serial data, serialize and encrypt every 8 sets of display data and corresponding display control signals into one encrypted serial data, serialize and encrypt every 16 sets of display data and corresponding display control signals into one encrypted serial data, or serialize and encrypt every 32 sets of display data and corresponding display control signals into one encrypted serial data. The serial transmission interface 113 is responsible for outputting one of the encrypted serial data to the display unit board 120 through the serial transmission channel 130. It is to be understood herein that, in the case where the encrypted serial data is multiplexed, a plurality of serial transmission interfaces 113 may be provided accordingly.
Specifically, the input image data is, for example, image data received by the programmable device 111 and transmitted via a transmission card by an upper computer. The image processing is, for example, processing of performing Gamma (Gamma) conversion, gradation extraction, and even correction such as luminance or luminance-chrominance correction on image data. Here, the gradation extraction is, for example, an operation such as Bit separation, that is, the gradation extraction is typically a manner in which gradation data after correction processing is subjected to a separation operation per Bit to convert the gradation data into a manner in which different implementation weights are given to different bits. The display control signals include, for example, a line scan signal, a clock signal, a latch signal, and an enable control signal (embodiments of the present invention are not limited thereto, and other control signals, such as a line blank signal, may be generated as needed). The plurality of sets of display data include, for example, a plurality of sets of RGB data, and may also be other display data, and are set according to the display requirements of the display unit panel 120, such as RGBY data and RGBW data. In addition, the programmable device 111 in this embodiment specifically obtains serial data after performing serialization processing on a plurality of sets of parallel data such as display data and display control signals, and then obtains encrypted serial data after encrypting the serial data.
As described above, as shown in fig. 2, the programmable device 111 in this embodiment specifically includes a data input module 1111, an image processing module 1112, a serialization processing module 1113, an encryption module 1114, and a data output module 1115. The data input module 1111 is mainly configured to receive input image data, for example, image data sent by a sending card via an upper computer; the image processing module 1112 is mainly configured to perform image processing on input image data to obtain multiple sets of display data, and locally generate corresponding display control signals; the serialization processing module 1113 is used for performing serialization processing on a plurality of groups of display data and display control signals to obtain one path or a plurality of paths of serial data; the encryption module 1114 is configured to encrypt the one or more paths of serial data respectively to obtain one or more paths of encrypted serial data; the data output module 1115 is configured to output a path of encrypted serial data to the serial transmission interface 113.
It should be noted that, in the case that there are a plurality of serial transmission interfaces 113 and display unit boards 120, the plurality of display unit boards 120 are connected to some or all of the plurality of serial transmission interfaces 113 in a one-to-one correspondence. For example, the number of the serial transmission interfaces 113 may be m, and the number of the display unit boards 120 may be any natural number greater than or equal to 1 and less than or equal to m. When the number of the display unit boards 120 is n and n is less than m, the n display unit boards 120 are respectively connected with the n serial transmission interfaces 113 in a one-to-one correspondence manner, i.e., part of the display unit boards are connected in a one-to-one correspondence manner; when the number n of the display unit boards 120 is m, the m display unit boards 120 are respectively connected to the m serial transmission interfaces 113 in a one-to-one correspondence, that is, all of the display unit boards are connected in a one-to-one correspondence.
As mentioned above, the single display unit board 120 (shown in fig. 1) includes, for example, the serial transmission interface 121, the receiving end processor 122, the display driving circuit 123, the pixel unit 124, and the intelligent module 125.
The serial transmission interface 121 is connected to the serial transmission interface 113 on the display control card 110 via a serial transmission channel 130, for example, and the encrypted serial data is transmitted to the serial transmission interface 121 via a single cable including the serial transmission channel 130 via the serial transmission interface 113, where the single cable is a Shielded Twisted Pair (STP) cable, for example.
The serial transmission channel 130 is, for example, a pair of transmission channels for serial differential signals. The Serial transmission interface 121 and the Serial transmission interface 113 are both of a single physical interface structure, and include a single-channel Serial differential signal interface such as a USB (Universal Serial Bus) interface or a multi-channel Serial differential signal interface such as a SATA (Serial Advanced technology attachment) interface. In addition, the display control card 110 is connected to the serial transmission interface 121 via the serial transmission interface 113 through a single cable, such as a USB cable or a SATA cable, and the serial transmission channel 130 is included in the single cable.
The two sides of the receiving end processor 122 are respectively connected to the serial transmission interface 121 and the display driving circuit 123, and are configured to decrypt and parallel-process a path of encrypted serial data to convert the encrypted serial data into parallel data including multiple sets of display data and display control signals. Specifically, as shown in fig. 3a, the receiving-end processor 122 includes a receiving module 1221, a decryption module 1222, a merging processing module 1223, and an output module 1224. The receiving module 1221 is configured to receive a path of encrypted serial data from the serial transmission interface 121; the decryption module 1222 is configured to decrypt the received encrypted serial data to obtain decrypted serial data; the parallelization processing module 1223 is configured to perform parallelization processing on the decrypted serial data to convert the decrypted serial data into parallel groups of display data and display control signals; the output module 1224 is configured to output the parallel sets of display data and display control signals to the display driving circuit 123 to drive and control the plurality of pixel units 124. In the embodiment, the programmable device 111 of the display control card 110 is integrated with the serialization processing and encryption processing functions, and the decryption processing and parallel processing functions on the receiving processor 122 of the display unit board 120 are matched, so that data interaction between the display control card 110 and the display unit board 120 is always in a protected state, image data from other unknown sources is prevented from entering the display control system 10, display of bad information on the display unit board 120 is prevented, and safety and high efficiency of data transmission between the display control card 110 and the display unit board 120 are realized.
In addition, in order to implement data interaction between the intelligent module 125 and the programmable device 111, the receiving module 1221 of the receiving-end processor 122 is further configured to receive the second encrypted serial data (which is referred to as intelligent module data because it is subsequently provided to the intelligent module 125) from the serial transmission interface 121, and correspondingly, the decrypting module 1222 is further configured to decrypt the second encrypted serial data to obtain second decrypted serial data; meanwhile, the receiving-end processor 122 (as shown in fig. 3 a) further includes a signal conversion module 1225 and an encryption module 1226, wherein the signal conversion module 1225 is connected to the decryption module 1222 and the encryption module 1226, and is configured to convert the second decrypted serial data into single-ended signal data and transmit the single-ended signal data to the intelligent module 125; the encryption module 1226 is configured to encrypt the single-ended signal data provided by the intelligent module 125 to obtain encrypted single-ended signal data; the signal conversion module 1225 is further configured to convert the encrypted single-ended signal data into serial differential signal data (also referred to as smart module data because it is originated from the smart module 125) and transmit the serial differential signal data to the serial transmission interface 121.
In other embodiments, in the case of single-ended serial signal transmission between the display control card 110 and the display unit board 120, the receiving-end processor 122 may not need the signal conversion module 1225, and the encryption module 1226 encrypts the single-ended signal data provided by the intelligent module 125 and transmits the encrypted single-ended signal data to the serial transmission interface 121.
The display drive circuit 123 includes, for example, a row decoder circuit and a column driver circuit, and even a row discharge circuit. Wherein, the row decoding circuit comprises row decoders such as 3-8 decoders and a row selection switch array; the column driving circuit includes, for example, a plurality of constant current source driving chips like MBI5025 series chips and the like; the row discharge circuit is used to discharge the parasitic capacitance on the row lines.
The pixel units 124 are connected to the display driving circuit 123, and the number of the pixel units is usually plural. Each pixel cell 124 includes at least one light emitting element 1241. Specifically, each pixel unit 124 may include, for example, a combination of light emitting elements of any one or more colors of a red light emitting element, a green light emitting element, and a blue light emitting element, and of course, the color of each light emitting element 1241 is not limited to the three primary colors of RGB, and may be four primary colors such as RGBY, or other multiple colors. More specifically, the pixel units 124 are arranged in rows and columns, for example, and are connected to the row decoding circuit via row lines and the column driving circuit via column lines, and the row discharging circuit is connected to the row lines, for example, to discharge parasitic capacitances on the row lines.
The intelligent module 125 is connected to the receiving end processor 122, and is configured to perform data interaction with the programmable device 111 through the receiving end processor 122, the serial transmission interface 121, and the serial transmission channel 130, and output a forward transmission gap of the encrypted serial data in the designated channel at the serial transmission interface 113. As shown in fig. 3b, the gap of the forward transmission includes a black field time slot in the designated encrypted serial data (e.g. including RGB data and display control signals) output by the serial transmission interface 113, and the interactive data between the intelligent module 125 and the programmable device 111 is transmitted in the black field time slot, for example. In addition, the intelligent module 125 is, for example, a MCU or other processor such as an ARM, a CPU, a CPLD, or an FPGA, which has a data or instruction processing capability, and is usually used in cooperation with other circuits or chips to monitor the status or information of some or all modules on the display unit board. Furthermore, the intelligent module 125 may be used to monitor physical parameters such as voltage and temperature on the display unit board 120, and may be connected to the display driving circuit 123 to obtain a point inspection result when the display unit board 120 performs point inspection; the lighting inspection here is, for example, to individually inspect each light emitting element 1241 in the pixel unit 124 to determine whether it can be normally lit.
In this embodiment, the programmable device 111 of the display control card 110 may encrypt 32 sets of display data and corresponding display control signals in a serial manner into eight sets of encrypted serial data, and correspondingly, eight serial transmission interfaces 113 may be provided to connect eight display unit boards 120, and the receiving end processor 122 on each display unit board 120 may decrypt and parallel one set of encrypted serial data received by itself to recover 4 sets of parallel display data and corresponding display control signals; or, the programmable device 111 of the display control card 110 may encrypt 32 sets of display data and corresponding display control signals in serial to four ways of encrypted serial data, and correspondingly, four serial transmission interfaces 113 may be provided to connect the four display unit boards 120, and the receiving end processor 122 on each display unit board 120 may decrypt and parallel the received one way of encrypted serial data to recover 8 sets of parallel display data and corresponding display control signals; or, the programmable device 111 of the display control card 110 may encrypt 32 sets of display data and corresponding display control signals in a serial manner into two encrypted serial data, and correspondingly, two serial transmission interfaces 113 may be provided to connect the two display unit boards 120, and the receiving end processor 122 on each display unit board 120 may decrypt and parallel one received encrypted serial data to recover 16 sets of parallel display data and corresponding display control signals; or, the programmable device 111 of the display control card 110 may encrypt 32 sets of display data and corresponding display control signals in serial to form an encrypted serial data, and correspondingly, a serial transmission interface 113 may be disposed to connect to a display unit board 120, and the receiving processor 122 on the display unit board 120 may decrypt and parallel the encrypted serial data received by itself to recover 32 sets of parallel display data and corresponding display control signals. Thus, the receiver processor 122 may employ a custom IC to have different decryption and merging processing capabilities.
In summary, in the first embodiment of the present invention, the arithmetic logic inside the programmable device 111 on the display control card 110 performs compression coding and encryption processing such as serialization and the like on a plurality of groups of display data and display control signals to obtain one or more paths of encrypted serial differential signal data, and then the one or more paths of encrypted serial differential signal data are sent to the display unit board 120 through a single physical interface structure such as a USB interface or a SATA-like interface, after receiving the encrypted serial differential signal data, the display unit board 120 decrypts and combines the encrypted serial differential signal data through the receiving end processor 122 to recover parallel display data and display control signals, and then the display driving circuit 123 controls the brightness and darkness of the plurality of pixel units 124. The smart module 125 uploads data to the programmable device 111 via the receiving processor 122, the serial transmission interface 121, and the serial transmission channel 130, in a gap of forward transmission in which the serial transmission interface 113 outputs the encrypted serial data of the designated channel. The embodiment of the invention can reduce the number of transmission signal lines, improve the stability and anti-interference of signals, and improve the EMC performance and the bandwidth utilization rate. The intelligence module 125 is provided to facilitate the intelligence of the display unit board 120. In addition, the intelligent module 125 uploads data to the display control card 110 in the interval of the forward transmission of the output encrypted serial data at the serial transmission interface 113 through the receiving end processor 122, the serial transmission interface 121 and the serial transmission channel 130, and the uploading data of the intelligent module 125, a plurality of groups of display data and display control signals are transmitted in the same serial transmission channel 130 by adopting a time division multiplexing mechanism, so that the use of cables can be reduced. In addition, the programmable device 111 is configured with an encryption function, the encrypted serial data can be correctly received and decoded only by the corresponding receiving end processor 122, and the introduction of the encryption mechanism is beneficial to realizing the security of data interaction between the display control card 110 and the display unit board 120.
Second embodiment
The display control system according to the second embodiment of the present invention includes a display control card 210 and a display unit board. The display unit board in this embodiment can refer to 120 in the first embodiment, and therefore, the details of the structure and function thereof are not repeated herein.
Specifically, referring to fig. 4, the display control card 210 includes, for example, a scan card 215 provided with a programmable device 211, and a patch card 217 provided with a serial transmission interface 213. The riser card 217 is further provided with a connector 219, for example. The programmable device 211 is configured to perform compression encoding such as serialization and encryption processing on a plurality of groups of display data and display control signals to obtain one or more paths of encrypted serial data, and then transmit the one or more paths of encrypted serial data to the corresponding serial transmission interface 213 through the connection component 219 for output. The scan card 215 is secured to the adapter card 217 by a connector 219. Further, the scan card 215 may be connected to a connection 219 on the riser card 217 via a gold finger configuration.
In addition, as shown in fig. 4 and 5, the adaptor card 217 further includes a communication module 218. The communication module 218 is connected to a connector 219. The communication module 218 is used to receive input image data and send the image data to the programmable device 111 disposed on the scanner card 215 via the connection 219 for processing. The communication module 218 includes a network transformer 218a and a network port 218 b. Network transformer 218a is connected between connection 219 and port 218b and connects programmable device 211, for example, through a PHY chip disposed on scancard 215. The port 218b is, for example, an RJ45 interface or other type of interface.
In addition, the technical solution of the present invention is not limited to the serial differential transmission method adopted in the foregoing first and second embodiments of the present invention, and a serial transmission method of a single-ended signal may also be adopted, which can also realize a function of high-speed serial data transmission.
Finally, it should be noted that the programmable device 111/211 in the first and second embodiments may be in the form of a single programmable device such as an FPGA, or may be in the form of a programmable device group formed by two or more programmable devices such as FPGAs. In addition, the display control card in the first and second embodiments is not limited to a multi-circuit board structure formed by separate components such as a scan card and an adapter card, and may be a single-circuit board structure in which all components on the scan card and all components on the adapter card are integrated on the same circuit board.
Third embodiment
Fig. 6 is a schematic structural diagram of a display control system 30 according to a third embodiment of the present invention. As shown in fig. 6, the display control system 30 includes: a display control card 310 and a display unit board 320. Display control card 310 includes, for example, programmable device 311 and serial transmission interface 313. The programmable device 311 performs image processing on input image data to obtain a plurality of sets of display data and locally generate a display control signal, for example, through an internal arithmetic logic, and performs compression encoding such as serialization and encryption processing on the plurality of sets of display data and display control signal to obtain one or more encrypted serial data, and the serial transmission interface 313 is responsible for outputting one of the encrypted serial data to the display unit board 320 through a unidirectional serial transmission channel 330. It is to be understood here that, in the case where the encrypted serial data is multiplexed, a plurality of serial transmission interfaces 313 may be provided accordingly.
Specifically, the input image data is, for example, image data received by the programmable device 311 and transmitted via a transmission card by an upper computer. The image processing is, for example, processing of performing gamma conversion, gradation extraction, and even correction such as luminance or luminance-chrominance correction on image data. Here, the gradation extraction is, for example, an operation such as Bit separation, that is, the gradation extraction is typically a manner in which gradation data after correction processing is subjected to a separation operation per Bit to convert the gradation data into a manner of giving different implementation weights in accordance with different bits. The display control signals include, for example, a line scan signal, a clock signal, a latch signal, and an enable control signal (embodiments of the present invention are not limited thereto, and other control signals, such as a line blank signal, may be generated as needed). The plurality of sets of display data include, for example, a plurality of sets of RGB data, and may also be other display data, and are set according to the display requirements of the display unit panel 120, such as RGBY data and RGBW data. In addition, in the embodiment, the programmable device 311 specifically obtains one or more paths of serialized data after performing serialization processing on a plurality of sets of parallel data such as display data and display control signals, and then obtains one or more paths of encrypted serial data after encrypting the one or more paths of serialized data respectively.
As described above, as shown in fig. 7, the programmable device 311 in this embodiment specifically includes a data input module 3111, an image processing module 3112, a serialization processing module 3113, an encryption module 3114, and a data output module 3115. The data input module 3111 is mainly configured to receive input image data, for example, image data sent from a sending card via an upper computer; the image processing module 3112 is mainly configured to perform image processing on input image data to obtain multiple sets of display data and generate the display control signal; the serialization processing module 3113 is configured to perform serialization processing on the multiple sets of display data and the display control signal to obtain one or more channels of serial data; the encryption module 3114 is configured to encrypt the one or more paths of serial data respectively to obtain one or more paths of encrypted serial data; the data output module 3115 is configured to output one of the one or more encrypted serial data to the serial transmission interface 313.
It should be noted that, in the case that there are a plurality of serial transmission interfaces 313 and display unit boards 320, the plurality of display unit boards 320 are connected to some or all of the plurality of serial transmission interfaces 313 in a one-to-one correspondence. For example, the number of the serial transmission interfaces 313 may be m, and the number of the display unit boards 320 may be any natural number greater than or equal to 1 and less than or equal to m. When the number of the display unit boards 320 is n and n is less than m, the n display unit boards 320 are respectively connected with the n serial transmission interfaces 313 in a one-to-one correspondence manner, namely, part of the display unit boards are connected in a one-to-one correspondence manner; when the number n of the display unit boards 320 is m, the m display unit boards 320 are respectively connected to the m serial transmission interfaces 313 in a one-to-one correspondence, that is, all of the m display unit boards are connected in a one-to-one correspondence.
As described above, the single display unit board 320 includes, for example, the serial transmission interface 321, the receiving-end processor 322, the display driving circuit 323, and the pixel unit 324.
The serial transmission interface 321 is connected to the serial transmission interface 313 on the display controller card 310 via the serial transmission channel 330, for example, and the encrypted serial data is transmitted to the serial transmission interface 321 via the serial transmission interface 313 via the single cable including the serial transmission channel 330.
The serial transmission channel 330 is, for example, a pair of transmission channels for serial differential signals. The serial transmission interface 321 and the serial transmission interface 313 are both single physical interface structures, for example, USB interfaces, which support plug and play and hot plug, are convenient to carry, have uniform standards, can be connected to various devices, and are widely applied. In addition, the display control card 310 is connected to the serial transmission interface 313 through a single cable, such as a USB cable, and the serial transmission channel 330 is included in the single cable, such as a single STP cable.
The two sides of the receiving end processor 322 are respectively connected to the serial transmission interface 321 and the display driving circuit 323, and are configured to decrypt and parallel the encrypted serial data to convert the encrypted serial data into parallel data including multiple sets of display data and display control signals. Specifically, as shown in fig. 8, the receiving-end processor 322 includes a receiving module 3221, a decryption module 3222, a merging processing module 3223, and an output module 3224. The receiving module 3221 is configured to receive an encrypted serial data from the serial transmission interface 321; the decryption module 3222 is configured to decrypt the encrypted serial data to obtain decrypted serial data; the parallelization processing module 3223 is configured to perform parallelization processing on the decrypted serial data to convert into the parallel multiple sets of display data and display control signals; the output module 3224 is configured to output the parallel sets of display data and display control signals to the display driving circuit 323 to drive and control the plurality of pixel units 324. In the embodiment, the programmable device 311 of the display control card 310 is integrated with a serialization processing function and an encryption processing function, and is matched with a decryption processing function and a parallel processing function on the receiving end processor 322 of the display unit board 320, so that data interaction between the display control card 310 and the display unit board 320 is always in a protected state, image data from other unknown sources is prevented from entering the display control system 30, display of bad information on the display unit board 320 is prevented, and safety and high efficiency of data transmission between the display control card 310 and the display unit board 320 are realized.
The display drive circuit 323 includes, for example, a row decoder circuit and a column driver circuit, and even a row discharge circuit. Wherein, the row decoding circuit comprises row decoders such as 3-8 decoders and a row selection switch array; the column driving circuit includes, for example, a plurality of constant current source driving chips like MBI5025 series chips and the like; the row discharge circuit is used to discharge the parasitic capacitance on the row lines.
The pixel units 324 are connected to the display driving circuit 323, and the number of the pixel units is usually plural. Each pixel cell 324 includes at least one light emitting element 3241. Specifically, each pixel unit 324 may include, for example, a combination of light emitting elements of any one or more colors of a red light emitting element, a green light emitting element, and a blue light emitting element, and of course, the color of each light emitting element 3241 is not limited to the three primary colors of RGB, and may be four primary colors such as RGBY, or other multiple colors. More specifically, the pixel cells 324 are arranged in rows and columns, for example, and are connected to the row decoding circuit via row lines and to the column driving circuit via column lines, while the row discharging circuit is connected to the row lines, for example, to discharge parasitic capacitances on the row lines.
In this embodiment, the programmable device 311 of the display control card 310 may encrypt 32 sets of display data and corresponding display control signals in a serial manner into eight sets of encrypted serial data, and correspondingly, eight serial transmission interfaces 313 may be provided to connect eight display unit boards 320, and the receiving end processor 322 on each display unit board 320 may decrypt and parallel one set of encrypted serial data received by itself to recover 4 sets of parallel display data and corresponding display control signals; or, the programmable device 311 of the display control card 310 may encrypt 32 sets of display data and corresponding display control signals in a serial manner into 4 sets of encrypted serial data, and correspondingly, four serial transmission interfaces 313 may be provided to connect four display unit boards 320, and the receiving end processor 322 on each display unit board 320 may decrypt and parallel one set of encrypted serial data received by itself to recover 8 sets of parallel display data and corresponding display control signals; or, the programmable device 311 of the display control card 310 may encrypt 32 sets of display data and corresponding display control signals in a serial manner into two encrypted serial data, and correspondingly, two serial transmission interfaces 313 may be provided to connect the two display unit boards 320, and the receiving end processor 322 on each display unit board 320 may decrypt and parallel one received encrypted serial data to recover 16 sets of parallel display data and corresponding display control signals; alternatively, the programmable device 311 of the display control card 310 may encrypt 32 sets of display data and corresponding display control signals in serial to form an encrypted serial data, and accordingly, a serial transmission interface 313 may be provided to connect to a display unit board 320, and the receiving processor 322 on the display unit board 320 may decrypt and parallel the encrypted serial data received by itself to recover 32 sets of parallel display data and corresponding display control signals. Thus, the receiver processor 322 may employ custom ICs to provide different decryption and merging processing capabilities.
In summary, in the third embodiment of the present invention, the arithmetic logic inside the programmable device 311 on the display control card 310 performs compression coding and encryption processing such as serialization and the like on a plurality of groups of display data and display control signals to obtain one or more paths of encrypted serial differential signal data, and then sends the one or more paths of encrypted serial differential signal data to the display unit board 320 through a single physical interface structure such as a USB interface, after receiving the encrypted serial differential signal data, the display unit board 320 decrypts and performs the parallel processing through the receiving end processor 322 to recover the original parallel display data and display control signals, and then controls the brightness and darkness of the plurality of pixel units 324 through the display driving circuit 323. The embodiment of the invention can reduce the number of transmission signal lines, improve the stability and anti-interference of signals, and improve the EMC performance and the bandwidth utilization rate.
In addition, in other embodiments, for example, as shown in fig. 9, the display unit board 320 may further be provided with a level shifter 325. The level shifter 325 is connected between the receiving-end processor 322 and the display driving circuit 323 and is configured to perform level shifting to output a TTL level signal to the display driving circuit 323. The level shifter 325 converts, for example, LVCMOS level signals into TTL level signals.
Fourth embodiment
The display control system according to the fourth embodiment of the present invention includes a display control card 410 and a display unit board. The display unit board in this embodiment can refer to 320 in the third embodiment, and therefore, the details of the structure and the function thereof are not repeated herein.
Specifically, referring to fig. 10, the display control card 410 includes, for example, a scan card 415 provided with a programmable device 411, and a switch card 417 provided with a serial transmission interface 413. The adapter card 417 is also provided with a connector 419, for example. The programmable device 411 is configured to perform compression encoding processing such as serialization and encryption processing on a plurality of sets of display data and display control signals to obtain one or more paths of encrypted serial data, and then transmit the one or more paths of encrypted serial data to the corresponding serial transmission interface 413 through the connection 419 for output. The scan card 415 is secured to the adapter card 417 by a connector 419. Further, the scan card 415 may be connected to the connector 419 on the adapter card 417 via a gold finger configuration. In addition, the adapter card 417 further includes a communication module 418. The communication module 418 is connected to the connector 419. The communication module 418 is used for receiving input image data and sending the image data to the programmable device 411 arranged on the scan card 415 through the connector 419 for processing. The communication module 418 includes a network transformer and a network port. The network transformer is connected between the connector 419 and the portal and connects to the programmable device 411, for example, through a PHY chip provided on the scan card 415. The network port is, for example, an RJ45 interface or other type of interface.
In addition, the technical solution of the present invention is not limited to the serial differential transmission method adopted in the third and fourth embodiments of the present invention, and a serial transmission method of a single-ended signal may also be adopted, which can also realize a function of high-speed serial data transmission.
Finally, it should be noted that the programmable devices in the third and fourth embodiments may be in the form of a single programmable device such as an FPGA, or may be in the form of a programmable device group formed by two or more programmable devices such as FPGAs. In addition, the display control card in the foregoing embodiment is not limited to a multi-circuit board structure formed by separate components such as a scan card and an adapter card, and may be a single-circuit board structure in which all components on the scan card and all components on the adapter card are integrated on the same circuit board.
Fifth embodiment
As shown in fig. 11, a fifth embodiment of the present invention provides a display control system 50 including: a display control card 510 and a display unit board 520.
Among them, display control card 510 includes: programmable device 511 and serial transmission interface 513.
The programmable device 511 is configured to perform image processing on input image data through internal arithmetic logic to obtain a plurality of sets of display data and locally generate a display control signal, and perform compression encoding processing such as serialization and encryption processing on the plurality of sets of display data and the display control signal to obtain one or more encrypted serial data for output. For example, the programmable device 511 may serialize and encrypt every 4 sets of display data and corresponding display control signals into one encrypted serial data, serialize and encrypt every 8 sets of display data and corresponding display control signals into one encrypted serial data, serialize and encrypt every 16 sets of display data and corresponding display control signals into one encrypted serial data, or serialize and encrypt every 32 sets of display data and corresponding display control signals into one encrypted serial data. The serial transmission interface 513 is responsible for outputting one of the encrypted serial data to the display unit board 520 through the serial transmission channel 530. Here, it is understood that, in the case where the encrypted serial data is multiplexed, a plurality of serial transmission interfaces 513 may be provided accordingly.
Specifically, the input image data is, for example, image data transmitted from a transmission card via an upper computer, which is received by the programmable device 511. The image processing is, for example, processing of performing gamma conversion, gradation extraction, and even correction such as luminance or luminance-chrominance correction on image data. Here, the gradation extraction is, for example, an operation such as Bit separation, that is, the gradation extraction is typically a manner in which gradation data after correction processing is subjected to a separation operation per Bit to convert the gradation data into a manner of giving different implementation weights in accordance with different bits. The display control signals include, for example, a line scan signal, a clock signal, a latch signal, and an enable control signal (embodiments of the present invention are not limited thereto, and other control signals, such as a line blank signal, may be generated as needed). The plurality of sets of display data include, for example, a plurality of sets of RGB data, and may also be other display data, and are set according to the display requirements of the display unit board 520, for example, RGBY data and RGBW data. In addition, the programmable device 511 in this embodiment specifically obtains serial data after performing serialization processing on a plurality of sets of parallel data such as display data and display control signals, and then obtains encrypted serial data after encrypting the serial data.
The serial transmission interface 513 is connected to the programmable device 511 and is configured to output an encrypted serial data, and it is, for example, a single physical interface structure, such as a USB interface, or it may also be another single physical interface structure, such as a SATA interface having dual serial differential channels.
As described above, the display unit board 520 includes: a serial transmission interface 521, a display driving circuit 523, a serial cascade interface 525, a receiving-end processor 522, and a pixel unit 524.
The serial transmission interface 521 is connected to the serial output interface 513 through a serial transmission channel 530, and is matched with the serial transmission interface 513, and is, for example, a single physical interface structure, such as a USB interface, etc., but may also be other single physical interface structures, such as a SATA-like interface with dual serial differential channels, etc.
The display driver circuit 523 may include a row decoder circuit and a column driver circuit, and even a row discharge circuit. Wherein, the row decoding circuit comprises row decoders such as 3-8 decoders and a row selection switch array; the column driving circuit includes, for example, a plurality of constant current source driving chips like MBI5025 series chips and the like; the row discharge circuit is used for discharging the parasitic capacitance on the row line.
The serial cascade interface 525 is connected to the receive-end processor 522, and may be, for example, a single physical interface structure, such as a USB interface, or may be other single physical interface structures, such as a SATA-like interface having dual serial differential channels.
The receiving-end processor 522 is connected to the serial transmission interface 521, the display driving circuit 523, and the serial cascade interface 525, and is configured to receive the encrypted serial data through the serial transmission interface 521. When the received encrypted serial data belongs to the display unit board 520, the receiving-end processor 522 decrypts and parallelizes the encrypted serial data to convert into parallel sets of display data and display control signals, transmits the parallel sets of display data and display control signals to the display driving circuit 523, and forwards the encrypted serial data to the serial cascade interface 525 when the received encrypted serial data does not belong to the display unit board 520. For example, the receiving-end processor 522 may use a custom IC, for example, and according to the strength of the custom function, it may recover one path of encrypted serial data including 4 sets of display data and corresponding display control signals into parallel data, recover one path of encrypted serial data including 8 sets of display data and corresponding display control signals into parallel data, recover one path of encrypted serial data including 16 sets of display data and corresponding display control signals into parallel data, or recover one path of encrypted serial data including 32 sets of display data and corresponding display control signals into parallel data.
The pixel units 524 are connected to the display driving circuit 523, and the number thereof is usually plural. Each of the pixel units 524 includes at least one light emitting unit 5241. The plurality of pixel units 524 are controlled by the display driving circuit 523, so that the display driving circuit 523 can drive and control the plurality of pixel units 524 according to the parallel sets of display data and display control signals. Further, the single pixel unit 524 may include any one or a combination of light emitting elements of a plurality of colors among a red light emitting element, a green light emitting element, and a blue light emitting element, and of course, the colors of the respective light emitting elements are not limited to the three primary colors of RGB, but may be four primary colors such as RGBY, or other colors.
Since the display control card 510 and the display unit board 520 are redesigned and connected by the serial transmission channel 530, the display control system 50 of the present embodiment requires fewer transmission signal lines and has a higher bandwidth utilization ratio, and has higher stability, anti-interference performance and electromagnetic compatibility when transmitting signals. Further, since the serial cascade interface 525 is provided, the display control system 50 of the present embodiment can cascade a plurality of display unit boards and then display an image collectively using the display unit boards.
Sixth embodiment
As shown in fig. 12, a sixth embodiment of the present invention provides a display control system 60 including: a display control card 610, a display unit board 620, and a display unit board 640.
Among them, display control card 610 includes: a scan card 615 provided with a programmable device 611, and a riser card 614 provided with a serial transmission interface 613. The adapter card 614 is further provided with a connector 619, and the scan card 615 is fixed on the adapter card 614 through the connector 614.
The programmable device 611 is configured to perform image processing on input image data through internal algorithm logic to obtain multiple sets of display data and locally generate a display control signal, and perform compression encoding processing such as serialization and encryption processing on the multiple sets of display data and the display control signal to obtain one or more encrypted serial data for output. For example, the programmable device 611 may serialize and encrypt every 4 sets of display data and corresponding display control signals into one encrypted serial data, serialize and encrypt every 8 sets of display data and corresponding display control signals into one encrypted serial data, serialize and encrypt every 16 sets of display data and corresponding display control signals into one encrypted serial data, or serialize and encrypt every 32 sets of display data and corresponding display control signals into one encrypted serial data. The serial transmission interface 613 is responsible for outputting one of the encrypted serial data to the display unit board 620 through the serial transmission channel 630. Here, it is understood that, in the case where the encrypted serial data is multiplexed, a plurality of serial transmission interfaces 613 may be provided accordingly.
Specifically, the input image data is, for example, image data received by the programmable device 611 and transmitted by a transmission card via an upper computer. The image processing is, for example, processing of performing gamma conversion, gradation extraction, and even correction such as luminance or luminance-chrominance correction on image data. Here, the gradation extraction is, for example, an operation such as Bit separation, that is, the gradation extraction is typically a manner in which gradation data after correction processing is subjected to a separation operation per Bit to convert the gradation data into a manner of giving different implementation weights in accordance with different bits. The display control signals include, for example, a line scan signal, a clock signal, a latch signal, and an enable control signal (embodiments of the present invention are not limited thereto, and other control signals, such as a line blank signal, may be generated as needed). The plurality of sets of display data include, for example, a plurality of sets of RGB data, and may also be other display data, and are set according to the display requirements of the display unit board 620, for example, RGBY data and RGBW data. In addition, the programmable device 611 in this embodiment specifically obtains serial data after performing serialization processing on a plurality of sets of parallel data such as display data and display control signals, and then obtains encrypted serial data after encrypting the serial data.
More specifically, as shown in fig. 13, the programmable device 611 in this embodiment specifically includes a data input module 6111, an image processing module 6112, a serialization processing module 6113, an encryption module 6114, and a data output module 6115. The data input module 6111 is mainly used to receive input image data, for example, image data sent by a sending card via an upper computer; the image processing module 6112 is mainly configured to perform image processing on input image data to obtain multiple sets of display data, and locally generate corresponding display control signals; the serialization processing module 6113 is configured to perform serialization processing on multiple sets of display data and display control signals to obtain one or more channels of serial data; the encryption module 6114 is configured to encrypt the one or more paths of serial data respectively to obtain one or more paths of encrypted serial data; the data output module 6115 is configured to output one path of encrypted serial data to the serial transmission interface 613.
Serial transport interface 613 connects programmable device 611 via connection 619 and is used to output encrypted serial data, such as a single physical interface structure like a SATA-like interface with dual serial differential lanes or other single physical interface structures with multiple serial differential lanes.
As described above, the display unit board 620 includes: a serial transmission interface 621, a display driving circuit 623, a serial cascade interface 625, a receiving-end processor 622, a pixel unit 624, a level shifter 626 and an intelligent module 627.
Serial transport interface 621 is coupled to serial output interface 613 through serial transport channel 630, which is compatible with serial transport interface 613, and is, for example, a single physical interface structure such as a SATA-like interface with dual serial differential channels or other single physical interface structures with multiple serial differential channels.
The display driver circuit 623 may include a row decoder circuit and a column driver circuit, and even a row discharge circuit. Wherein, the row decoding circuit comprises row decoders such as 3-8 decoders and a row selection switch array; the column driving circuit includes, for example, a plurality of constant current source driving chips like MBI5025 series chips and the like; the row discharge circuit is used for discharging the parasitic capacitance on the row line.
The serial cascade interface 625 is connected to the receiving-end processor 622, and may be, for example, a single physical interface structure, such as a USB interface, or may be other single physical interface structures, such as a SATA-like interface having dual serial differential channels. The serial transmission interface 613 and the serial transmission interface 621 are connected by a single cable, for example, an STP cable having a dual serial differential transmission channel, and the serial transmission channel 630 is included in the single cable and is a dual serial differential transmission channel; one of the dual serial differential transmission channels is a unidirectional serial transmission channel and is used for transmitting encrypted serial data including a plurality of sets of display data and display control signals, and the other channel is a bidirectional serial transmission channel and is used for bidirectional data interaction between the display control card 610 and the intelligent module 627. It should be noted that the intelligent module 627 is connected to the serial transmission interface 621 through a differential signal transceiver such as SP 485.
The receiving-end processor 622 is connected to the serial transmission interface 621, the display driving circuit 623, and the serial cascade interface 625, and is configured to receive the encrypted serial data through the serial transmission interface 621. When the received encrypted serial data belongs to the display unit board 620, the receiving-end processor 622 performs decryption and parallelization processing on the received encrypted serial data to convert into parallel sets of display data and display control signals, transfers the parallel sets of display data and display control signals to the display driving circuit 623, and forwards the received encrypted serial data to the serial cascade interface 625 when the received encrypted serial data does not belong to the display unit board 620. For example, the receiving-end processor 622 may use a custom IC, for example, and according to the strength of the custom function, it may recover one path of encrypted serial data including 4 sets of display data and corresponding display control signals into parallel data, recover one path of encrypted serial data including 8 sets of display data and corresponding display control signals into parallel data, recover one path of encrypted serial data including 16 sets of display data and corresponding display control signals into parallel data, or recover one path of encrypted serial data including 32 sets of display data and corresponding display control signals into parallel data.
More specifically, as shown in fig. 14, the receiving-end processor 622 includes: a receiving module 6221, a judging module 6222, a decrypting module 6223, a merging processing module 6224, an outputting module 6225 and a forwarding module 6226. The receiving module 6221 is used for receiving the encrypted serial data from the serial transmission interface 621. The judging module 6222 is connected to the receiving module 6221 and is used for judging whether the encrypted serial data belongs to the display unit board 620. The decryption module 6223 is connected to the judgment module 6222 and configured to decrypt the encrypted serial data to obtain decrypted data when the encrypted serial data belongs to the display unit board 620. The parallelization processing module 6224 is connected to the decryption module 6223 and configured to perform parallelization processing on the decrypted data to convert the decrypted data into parallel groups of display data and display control signals. The output module 6225 is connected to the parallelization processing module 6224 and configured to output the parallel sets of display data and display control signals to the display driving circuit 623. The forwarding module 6226 is connected to the judging module 6222 and is used for forwarding the encrypted serial data to the serial cascade interface 625 when the encrypted serial data does not belong to the display unit board 620.
The pixel units 624 are connected to the display driving circuit 623, and the number thereof is usually plural. Each pixel unit 624 includes at least one light emitting unit 6241. The plurality of pixel units 624 are controlled by the display driving circuit 623, so that the display driving circuit 623 can drive and control the plurality of pixel units 624 according to the parallel sets of display data and display control signals. Further, the single pixel unit 624 may include any one or a combination of light emitting elements of a plurality of colors among a red light emitting element, a green light emitting element, and a blue light emitting element, and of course, the colors of the respective light emitting elements are not limited to the three primary colors of RGB, and may be four primary colors such as RGBY, or other colors.
Since the display control card 610 and the display unit board 620 are redesigned and connected by the serial transmission channel 630, the display control system 60 of the present embodiment requires fewer transmission signal lines and has a higher bandwidth utilization rate, and has higher stability, anti-interference performance and electromagnetic compatibility when transmitting signals. Further, since the serial cascade interface 625 is provided, the display control system of the present embodiment can cascade a plurality of display unit boards and then display an image collectively using the display unit boards.
As described above, the level shifter 626 is connected between the receiving-end processor 622 and the display driving circuit 623 and is configured to perform level shifting to output a TTL level signal to the display driving circuit 623. The level shifter 626 converts, for example, a LVCMOS level signal into a TTL level signal.
The intelligent module 627 is connected to the serial transmission interface 621, and the intelligent module 627 is further connected to a display driving circuit 623, which is usually matched with other circuits or chips to monitor the status or information of some or all modules on the display unit board 620, and may be an MCU or other processor, such as an ARM, a CPU, a CPLD, or an FPGA or other chips with data or instruction processing capability.
As described above, the display unit panel 640 includes at least: a serial transmission interface 641, a pixel unit 644, a display driving circuit 643, and a receiving-side processor 642.
The serial transmission interface 641 is used for connecting the serial cascade interface 625 via the serial transmission channel 650 to obtain serial data forwarded by the receiving-end processor 622, and it may be, for example, a single physical interface structure, such as a USB interface, or it may be other single physical interface structures, such as a SATA-like interface with dual serial differential channels.
The pixel units 644 are connected to the display driving circuit 643, and the number thereof is usually plural. Each pixel cell 644 includes at least one light-emitting element 6441. The plurality of pixel units 644 are controlled by the display driving circuit 643, so that the display driving circuit 643 can drive-control the plurality of pixel units 644 according to the plurality of sets of display data and display control signals in parallel. Further, the single pixel unit 644 may include any one or a combination of light emitting elements of a plurality of colors among a red light emitting element, a green light emitting element, and a blue light emitting element, and of course, the colors of the respective light emitting elements are not limited to the three primary colors of RGB, and may be four primary colors such as RGBY, or other colors.
The display driving circuit 643 is connected to a plurality of pixel units 644, which may include a row decoder circuit and a column driving circuit, and even a row discharge circuit. Wherein, the row decoding circuit comprises row decoders such as 3-8 decoders and a row selection switch array; the column driving circuit includes, for example, a plurality of constant current source driving chips like MBI5025 series chips and the like; the row discharge circuit is used for discharging the parasitic capacitance on the row line.
The receiving end processor 642 is connected to the serial transmission interface 641 and the display driving circuit 643, and is configured to decrypt and parallel the forwarded encrypted serial data to convert into parallel sets of display data and display control signals when the forwarded encrypted serial data belongs to the display unit board 640, and to transmit the parallel sets of display data and display control signals to the display driving circuit 643 to drive and control the plurality of pixel units 644. For example, the receiving-end processor 642 may use a custom IC, and according to the strength of the custom function, it may recover one path of encrypted serial data including 4 sets of display data and corresponding display control signals into parallel data, recover one path of encrypted serial data including 8 sets of display data and corresponding display control signals into parallel data, recover one path of encrypted serial data including 16 sets of display data and corresponding display control signals into parallel data, or recover one path of encrypted serial data including 32 sets of display data and corresponding display control signals into parallel data.
In addition, it should be noted that, in the sixth embodiment, the display unit board 640 and the display unit board 620 have different structures, but the present invention is not limited thereto, and the display unit board 640 may also have the same structure as the display unit board 620, for example, the display unit board 640 is also provided with an intelligent module or even a serial cascade interface.
Seventh embodiment
As shown in fig. 15, a seventh embodiment of the present invention provides a display unit panel 720 including: a serial transmission interface 721, a receiving end processor 722, a display driving circuit 723, a pixel unit 724, a serial cascade interface 725, a level shifter 726 and an intelligent module 727.
The serial transmission interface 721 receives the encrypted serial data including a plurality of sets of display data and display control signals through a serial transmission channel, which may be a single physical interface structure, a dual serial differential transmission channel such as a SATA interface, or a multi serial differential transmission channel.
The display driving circuit 723 may include a row decoder circuit and a column driving circuit, and even a row discharge circuit. Wherein, the row decoding circuit comprises row decoders such as 3-8 decoders and a row selection switch array; the column driving circuit includes, for example, a plurality of constant current source driving chips like MBI5025 series chips and the like; the row discharge circuit is used for discharging the parasitic capacitance on the row line.
The serial cascade interface 725 is connected to the receiving end processor 722, and may be, for example, a single physical interface structure, such as a USB interface, or may be another single physical interface structure, such as a SATA-like interface with dual serial differential channels.
The receiving-end processor 722 is connected to the serial transmission interface 721, the display driver circuit 723 (via the level shifter 726), and the serial cascade interface 725. The receiving-end processor 722 is configured to receive the encrypted serial data through the serial transmission interface 721, decrypt and parallel the encrypted serial data to convert into parallel sets of display data and display control signals when the encrypted serial data belongs to the display unit board 720, transmit the parallel sets of display data and display control signals to the display driving circuit 723, and forward the encrypted serial data to the serial cascade interface 725 when the encrypted serial data does not belong to the display unit board 720.
The pixel units 724 are connected to the display driving circuit 723, and the number of the pixel units is usually multiple. Each pixel unit 724 includes at least one light emitting unit 7241. The plurality of pixel units 724 are controlled by the display driving circuit 723, so that the display driving circuit 723 can drive and control the plurality of pixel units 724 according to the parallel sets of display data and display control signals. For example, the receiving-end processor 722 may use a custom IC, for example, and according to the strength of the custom function, it may recover one path of encrypted serial data including 4 sets of display data and corresponding display control signals into parallel data, recover one path of encrypted serial data including 8 sets of display data and corresponding display control signals into parallel data, recover one path of encrypted serial data including 16 sets of display data and corresponding display control signals into parallel data, or recover one path of encrypted serial data including 32 sets of display data and corresponding display control signals into parallel data.
More specifically, the receiving-end processor 722 includes: the receiving module, the determining module, the decrypting module, the merging processing module, the outputting module, and the forwarding module refer to the structure diagram of the receiving end processor 622 shown in fig. 14. The receiving module is used for receiving the encrypted serial data from the serial transmission interface 721. The judging module is connected to the receiving module and is used for judging whether the encrypted serial data belongs to the display unit board 720. The decryption module is connected to the judgment module and configured to decrypt the encrypted serial data to obtain decrypted data when the encrypted serial data belongs to the display unit board 720. And the parallel processing module is connected with the decryption module and is used for carrying out parallel processing on the decrypted data so as to convert the decrypted data into a plurality of groups of parallel display data and display control signals. The output module is connected to the parallel processing module and is configured to output the parallel sets of display data and display control signals to the display driving circuit 723. The forwarding module is connected to the determining module and is configured to forward the encrypted serial data to the serial cascade interface 725 when the encrypted serial data does not belong to the display unit board 720.
The level shifter 726 is connected between the receiving-end processor 722 and the display driving circuit 723, and is configured to perform level shifting to output a TTL level signal to the display driving circuit 723.
The intelligent device module 727 is connected to the receiving end processor 722, and the intelligent device module 727 is further connected to a display driving circuit 723, which is usually used in cooperation with other circuits or chips to monitor the status or information of some or all modules on the display unit board, and may be an MCU or other processor such as an ARM, a CPU, a CPLD, or an FPGA or other chip with data or instruction processing capability. In the embodiment, since the intelligent module 727 is connected to the receiving end processor 722, as the customized IC, a module similar to a serial differential signal transceiver such as an SP485 chip needs to be disposed inside the receiving end processor 722. Since the serial cascade interface 725 is provided in the present embodiment, the display unit board 720 may forward encrypted serial data that does not belong to itself to the serial cascade interface 725.
Eighth embodiment
An eighth embodiment of the present invention provides a display control system, which includes a display control card and a plurality of display unit boards, such as the display unit board 720 shown in fig. 15. The two adjacent display unit boards are cascaded through a serial transmission channel in a single cable, and the display control card is connected with a serial transmission interface of a first-stage display unit board in the cascaded display unit boards through the serial transmission channel.
It should be noted that the technical solution of the present invention is not limited to the serial differential transmission mode adopted in the fifth to eighth embodiments of the present invention, and a serial transmission mode of a single-ended signal may also be adopted, which may also implement a function of high-speed serial data transmission.
Finally, it should be noted that the programmable devices in the fifth to eighth embodiments may be in the form of a single programmable device such as an FPGA, or may be in the form of a programmable device group formed by two or more programmable devices such as FPGAs. In addition, the display control card in the foregoing embodiment is not limited to a multi-circuit board structure formed by separate components such as a scan card and an adapter card, and may be a single-circuit board structure in which all components on the scan card and all components on the adapter card are integrated on the same circuit board. In addition, the scanning card can be connected with a connecting piece on the adapter card through a golden finger structure.
In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present application, and technical solutions of the embodiments can be arbitrarily combined and used in combination without conflict, contradiction, or conflict with the purpose of the present application.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and/or method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units/modules is only one logical division, and there may be other divisions in actual implementation, for example, multiple units or modules 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.
The units/modules described as separate parts may or may not be physically separate, and parts displayed as units/modules may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units/modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, each functional unit/module in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules may be integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units/modules.
The integrated units/modules, which are implemented in the form of software functional units/modules, may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing one or more processors of a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (15)

1. A display control system, comprising:
display control card, including:
the programmable device is used for carrying out serialization and encryption processing on a plurality of groups of display data and display control signals to obtain one path or a plurality of paths of encrypted serial data;
the first serial transmission interface is connected with the programmable device and is used for outputting the specified encrypted serial data in the one or more encrypted serial data; and
a display unit panel comprising:
the second serial transmission interface is connected with the first serial transmission interface through a serial transmission channel;
a display driving circuit;
the receiving end processor is connected with the second serial transmission interface and the display driving circuit and is used for receiving the encrypted serial data of the appointed route through the second serial transmission interface, decrypting and merging the encrypted serial data of the appointed route so as to convert the encrypted serial data into a plurality of groups of parallel display data and display control signals and transmitting the display data and the display control signals to the display driving circuit;
and the display driving circuit is used for driving and controlling the plurality of pixel units according to the parallel groups of display data and display control signals.
2. The display control system of claim 1, wherein the programmable device comprises:
the data input module is used for receiving input image data;
the image processing module is used for carrying out image processing on the input image data to obtain the multiple groups of display data and generating the display control signals;
the serialization processing module is used for carrying out serialization processing on the multiple groups of display data and the display control signals to obtain one or more paths of serial data;
the encryption module is used for respectively encrypting the one-way or multi-way serial data to obtain the one-way or multi-way encrypted serial data;
and the data output module is used for outputting one path of encrypted serial data in the one path or the plurality of paths of encrypted serial data to the first serial transmission interface as the appointed path of encrypted serial data.
3. The display control system of claim 1, wherein the sink processor comprises:
the receiving module is used for receiving the serial data encrypted by the appointed route from the second serial transmission interface;
the decryption module is used for decrypting the specified encrypted serial data to obtain decrypted serial data;
the parallel processing module is used for carrying out parallel processing on the decrypted serial data so as to convert the decrypted serial data into a plurality of groups of parallel display data and display control signals;
and the output module is used for outputting the parallel groups of display data and display control signals to the display driving circuit.
4. The display control system of claim 1, wherein the display unit board further comprises an intelligent module, the intelligent module being connected to the second serial transmission interface via the receiving end processor; the serial transmission channel is positioned in the single cable and is a bidirectional serial transmission channel, and the intelligent module is used for performing data interaction with the programmable device of the display control card through the bidirectional serial transmission channel at a gap of forward transmission of the encrypted serial data of the specified channel output by the first serial transmission interface.
5. The display control system of claim 4, wherein the sink processor comprises:
a receiving module for receiving the lane-specific encrypted serial data from the second serial transmission interface and for receiving second encrypted serial data from the second serial transmission interface;
the decryption module is used for decrypting the encrypted serial data of the specified path to obtain decrypted serial data and decrypting the second encrypted serial data to obtain second decrypted serial data;
the parallel processing module is used for carrying out parallel processing on the decrypted serial data so as to convert the decrypted serial data into a plurality of groups of parallel display data and display control signals;
the output module is used for outputting the parallel groups of display data and display control signals to the display driving circuit;
the second encryption module is used for encrypting the single-ended signal data output by the intelligent module to obtain encrypted single-ended signal data;
and the signal conversion module is connected with the decryption module and the second encryption module, and is used for converting the second decrypted serial data into single-ended signal data and outputting the single-ended signal data to the intelligent module, and converting the encrypted single-ended signal data into serial differential signal data and transmitting the serial differential signal data to the second serial transmission interface.
6. The display control system according to claim 4, wherein the gap of the forward transmission comprises a black field time slot in the designated lane of encrypted serial data output by the first serial transmission interface.
7. The display control system of claim 1, wherein the display unit board further comprises an intelligent module, the intelligent module being connected to the second serial transmission interface; the serial transmission channel is positioned in the single cable and comprises a one-way serial transmission channel and a two-way serial transmission channel, the one-way serial transmission channel is used for transmitting the encrypted serial data of the appointed path to the display unit board, and the two-way serial transmission channel is used for data interaction between the intelligent module and the programmable device of the display control card.
8. The display control system of claim 1, wherein the display unit board further comprises:
and the level shifter is connected between the receiving end processor and the display driving circuit and is used for performing level shifting so as to output TTL level signals to the display driving circuit.
9. The display control system according to claim 1, wherein the display control card comprises an adapter card and a scan card, the adapter card is provided with a connector, the scan card is fixed on the adapter card through the connector, the programmable device is arranged on the scan card, and the first serial transmission interface is arranged on the adapter card and connected to the connector; the adapter card further comprises a communication module, and the communication module is connected with the connecting piece and used for receiving input image data and sending the image data to the programmable device arranged on the scanning card through the connecting piece.
10. The display control system of claim 1, wherein the display unit board further comprises a serial cascade interface; the serial cascade interface is connected with the receiving end processor, so that the receiving end processor is connected between the second serial transmission interface and the serial cascade interface; the receiving end processor is specifically configured to decrypt and parallel the encrypted serial data to convert the encrypted serial data into the parallel sets of display data and display control signals to be transmitted to the display driving circuit when the received encrypted serial data of the designated line belongs to the display unit board, and forward the encrypted serial data to the serial cascade interface when the received encrypted serial data of the designated line does not belong to the display unit board.
11. The display control system according to claim 10, wherein the sink processor comprises:
the receiving module is used for receiving the serial data encrypted by the appointed route from the second serial transmission interface;
the judging module is used for judging whether the received encrypted serial data of the specified route belongs to the display unit board;
the decryption module is used for decrypting the encrypted serial data of the appointed path to obtain decrypted serial data when the received encrypted serial data of the appointed path belongs to the display unit board;
the parallel processing module is used for carrying out parallel processing on the decrypted serial data so as to convert the decrypted serial data into a plurality of groups of parallel display data and display control signals;
the output module is used for outputting the parallel groups of display data and display control signals to the display driving circuit; and
and the forwarding module is used for forwarding the encrypted serial data of the specified path to the serial cascade interface when the received encrypted serial data of the specified path does not belong to the display unit board.
12. A display cell plate, comprising:
the serial transmission interface is a single-channel or multi-channel serial differential signal interface;
a display driving circuit;
the receiving end processor is connected with the serial transmission interface and the display driving circuit and is used for receiving input encrypted serial data through the serial transmission interface, decrypting and parallelizing the encrypted serial data to convert the encrypted serial data into a plurality of groups of parallel display data and display control signals and transmitting the display data and the display control signals to the display driving circuit;
and the display driving circuit is used for driving and controlling the plurality of pixel units according to the parallel groups of display data and display control signals.
13. The display cell board of claim 12, wherein the display cell board further comprises an intelligent module, and the intelligent module is connected to the serial transmission interface through the receive-end processor; the intelligent module shares a single serial differential transmission channel of the serial transmission interface with the input encrypted serial data in a time division multiplexing mode through the receiving end processor and the intelligent module data output by the serial transmission interface.
14. The display cell board of claim 12, wherein the display cell board further comprises an intelligent module, and the intelligent module is connected to the serial transmission interface; the intelligent module respectively uses two serial differential transmission channels in the serial transmission interface through intelligent module data output by the serial transmission interface and the input encrypted serial data.
15. The display cell board of any one of claims 12 to 14, further comprising a serial cascade interface; the serial cascade interface is connected with the receiving end processor, so that the receiving end processor is connected between the serial transmission interface and the serial cascade interface; the receiving end processor is specifically configured to decrypt and parallel the encrypted serial data to convert the encrypted serial data into the parallel sets of display data and display control signals to be transmitted to the display driving circuit when the received encrypted serial data of the designated route belongs to the display unit board, and forward the encrypted serial data of the designated route to the serial cascade interface when the received encrypted serial data of the designated route does not belong to the display unit board.
CN201811210302.6A 2018-10-17 2018-10-17 Display control system and display unit board Active CN111063285B (en)

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