CN111063285B - Display control system and display unit board - Google Patents

Display control system and display unit board Download PDF

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Publication number
CN111063285B
CN111063285B CN201811210302.6A CN201811210302A CN111063285B CN 111063285 B CN111063285 B CN 111063285B CN 201811210302 A CN201811210302 A CN 201811210302A CN 111063285 B CN111063285 B CN 111063285B
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data
display
serial
display control
encrypted
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CN111063285A (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]

Abstract

The embodiment of the invention relates to a display control system, which comprises a display control card, a display control system and a display control system, wherein the display control card comprises: the programmable device is used for serializing and encrypting a plurality of groups of display data and display control signals to obtain one or more 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 designated path. The display unit board 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 appointed path encrypted serial data through the second serial transmission interface, decrypting and combining the appointed encrypted serial data to convert the appointed encrypted serial data into parallel multiple groups of display data and display control signals, and transmitting the parallel multiple groups of display data and the display control signals to the display driving circuit to drive and control the multiple pixel units.

Description

Display control system and display unit board
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display control system and a display unit board.
Background
In the prior art, a scanning card is used for dot screen, and dot screen signals are parallel driving signals used for driving a display unit board of a display screen. If the existing scanning card outputs 32 groups of data sets, at least 105 TTL-level transmission lines are connected with the display unit board. For the intelligent module, the UART serial port of TX/RX is used for transmission. Because the number of wires is large, the size of the current PCB layout cannot be too small, meanwhile, the number of wire harnesses is large, the system maintenance and the system stability are unreliable, and the limitation of TTL level crosstalk and 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 anti-interference performance of signals and improve the EMC performance so that the system is more stable, and is a technical problem to be solved urgently at present.
Disclosure of Invention
The embodiment of the invention provides a display control system and a display unit board, which can reduce the number of transmission signal lines, improve the stability and anti-interference performance of signals and improve EMC performance and/or bandwidth utilization rate.
Specifically, the display control system provided by the embodiment of the invention comprises: a display control card and a display unit board. Wherein, the display control card includes: the programmable device is used for serializing and encrypting a plurality of groups of display data and display control signals to obtain one or more paths of encrypted serial data; and the first serial transmission interface is connected with the programmable device and is used for outputting the appointed path encrypted serial data in the one path or multiple paths of encrypted serial data. The display unit board 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 appointed path encrypted serial data through the second serial transmission interface, decrypting and combining the appointed encrypted serial data to be converted into parallel multiple groups of display data and display control signals and transmitting the parallel multiple groups of display data and display control signals to the display driving circuit; and a plurality of pixel units connected with the display driving circuit, wherein the display driving circuit is used for driving and controlling the plurality of pixel units according to the parallel multiple groups of display data and display control signals.
In one embodiment of the invention, the programmable device comprises: a data input module for receiving input image data; the image processing module is used for carrying out image processing on the input image data to obtain a plurality of groups of display data and generating the display control signals; the serialization processing module is used for serializing the plurality of 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 carrying out encryption processing on the one or more paths of serial data to obtain one or more paths of encrypted serial data; and the data output module is used for outputting one path of encrypted serial data in the one path or multiple 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 appointed-path encrypted serial data from the second serial transmission interface; the decryption module is used for decrypting the appointed 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 multiple groups of display data and display control signals to the display driving circuit.
In one 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 a single cable and is a bidirectional serial transmission channel, and the intelligent module is used for carrying out data interaction with the programmable device of the display control card through the bidirectional serial transmission channel in a gap of forward transmission of the specified path encrypted serial data output by the first serial transmission interface.
In one embodiment of the present invention, the receiving-end processor includes: a receiving module, configured to receive the encrypted serial data of the designated path from the second serial transmission interface and to receive second encrypted serial data from the second serial transmission interface; the decryption module is used for decrypting the encrypted serial data of the designated 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 multiple 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 present invention, the gap of the forward transmission includes a black field time slot in the specified path encrypted serial data output by the first serial transmission interface.
In one 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 a single cable and comprises a unidirectional serial transmission channel and a bidirectional serial transmission channel, the unidirectional serial transmission channel is used for transmitting the appointed path encrypted serial data to the display unit board, and the bidirectional 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 board further includes: and the level shifter is connected between the receiving end processor and the display driving circuit and is used for carrying out level shifting so as to output TTL level signals to the display driving circuit.
In one 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 provided on the scan card, and the first serial transmission interface is provided on the adapter card and is connected with the connector; the transfer card also comprises a communication module which 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 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 merge the encrypted serial data to convert the encrypted serial data into parallel groups of display data and display control signals when the received encrypted serial data belongs to the display unit board, and transmit the encrypted serial data to the serial cascade interface when the received encrypted serial data 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 appointed-path encrypted serial data from the second serial transmission interface; the judging module is used for judging whether the received encrypted serial data of the designated path belongs to the display unit board or not; the decryption module is used for decrypting the specified path encrypted serial data to obtain decrypted serial data when the received specified path encrypted serial data 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 multiple groups of display data and display control signals to the display driving circuit; and the forwarding module is used for forwarding the appointed path encrypted serial data to the serial cascade interface when the received appointed path encrypted serial data does not belong to the display unit board.
In addition, a display unit board provided in an embodiment of the present invention includes: 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 combining the encrypted serial data to convert the encrypted serial data into parallel multiple groups of display data and display control signals, and transmitting the parallel multiple groups of display data and display control signals to the display driving circuit; and a plurality of pixel units connected to the display driving circuit, wherein each pixel unit includes at least one light emitting element, and the display driving circuit is configured to drive and control the plurality of pixel units according to the parallel plurality of sets of display data and display control signals.
In one 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 group shares a single serial differential transmission channel of the serial transmission interface in a time division multiplexing mode with the input encrypted serial data through the intelligent module group data output by the receiving end processor and the serial transmission interface.
In one 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 data output by the intelligent module through the serial transmission interface and the input encrypted serial data respectively use two serial differential transmission channels in the serial transmission interface.
In one embodiment of the 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 merge the encrypted serial data to convert the encrypted serial data into parallel groups of display data and display control signals to be transmitted to the display driving circuit when the received encrypted serial data of the designated way belongs to the display unit board, and forward the encrypted serial data of the designated way to the serial cascade interface when the received encrypted serial data of the designated way does not belong to the display unit board.
The technical scheme can have one or more of the following advantages: through redesign of the display control card and the display unit board, for example, a programmable device on the display control card has a serialization encryption function through software programming, and/or a receiving end processor is additionally arranged on the display unit board and connected through a serial transmission channel, the number of transmission signal lines can be reduced, meanwhile, the stability and the anti-interference performance of signals are improved, and the EMC performance and/or the bandwidth utilization rate are 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. Furthermore, by connecting the intelligent module to the receiving end processor, the interaction between the display control card and the display unit board can be completed through a single serial transmission channel; alternatively, the intelligent module is connected to the second serial transmission interface, and the interaction between the display control card and the display unit board can be completed by a unidirectional serial transmission channel and a bidirectional serial transmission channel in the same cable, so that the concurrency of the interaction is facilitated. In addition, by providing a serial cascade interface, the display control system of the embodiment of the invention can cascade a plurality of display unit boards and then display images together by using the display unit boards.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a display control system according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of the programmable device of FIG. 1;
FIG. 3a is a schematic diagram illustrating a configuration of a receiving-side processor in FIG. 1;
FIG. 3b is a schematic diagram showing data interaction between the control card and the display unit board;
FIG. 4 is a schematic diagram of a display control card according to a second embodiment of the present invention;
FIG. 5 is a schematic diagram of the communication module shown in FIG. 4;
FIG. 6 is a schematic diagram of a display control system according to a third embodiment of the present invention;
FIG. 7 is a schematic diagram of the programmable device of FIG. 6;
FIG. 8 is a schematic diagram of a receiver processor in FIG. 6;
FIG. 9 is a schematic diagram of a display control system according to another embodiment of the present invention;
FIG. 10 is a schematic diagram of a display control card according to a fourth embodiment of the present invention;
FIG. 11 is a schematic diagram of a display control system according to a fifth embodiment of the present invention;
FIG. 12 is a schematic diagram of a display control system according to a sixth embodiment of the present invention;
FIG. 13 is a schematic diagram showing a specific structure of the programmable device in FIG. 12;
FIG. 14 is a schematic diagram of a specific structure of the receiver-side processor in FIG. 12;
fig. 15 is a schematic structural view of a display unit board according to a seventh embodiment of the present invention.
[ main element notation ] the following:
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: adapter card
218. 418: communication module
219. 419, 619: connecting piece
218a: network transformer
218b: net mouth
325. 726, respectively: level shifter
525. 625, 725: serial cascade interface
6222: judgment module
6226: forwarding module
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
First embodiment
Fig. 1 is a schematic 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, for example, through internal algorithm logic, to obtain multiple sets of display data, generates a display control signal locally, and performs serial equal-pressure encoding processing and encryption processing on the multiple sets of display data and the display control signal to obtain one or multiple paths of 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, may serialize and encrypt every 8 sets of display data and corresponding display control signals into one encrypted serial data, may 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 path of encrypted serial data to the display unit board 120 through the serial transmission channel 130. It will be appreciated here that in the case where the encrypted serial data is multiplexed, then 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 through the transmission card via the host computer. The image processing is, for example, processing of performing Gamma (Gamma) conversion, gradation extraction, or even correction such as brightness or luminance-color correction on the image data. Here, the gradation extraction is, for example, a Bit separation operation or the like, that is, the gradation extraction is typically a manner in which the gradation data after correction processing is subjected to a separation operation per Bit to convert the gradation data into a manner in which different realization weights are given to different bits. The display control signals include, for example, a row scan signal, a clock signal, a latch signal, and an enable control signal (the embodiment of the present invention is not limited thereto, and other control signals, such as a row blanking signal, may be generated as needed). The plurality of sets of display data include, for example, a plurality of sets of RGB data, but may be other display data, for example, RGBY data, RGBW data, which are set according to the display requirements of the display unit board 120. In addition, the programmable device 111 in this embodiment specifically obtains serial data after serializing a plurality of sets of parallel data such as display data and display control signals, and then encrypts the serial data to obtain encrypted 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 transmitted by a transmitting card via a host 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 configured to serialize multiple sets of display data and display control signals to obtain one or multiple paths of serial data; the encryption module 1114 is configured to encrypt the one or more paths of serial data to obtain one or more paths of encrypted serial data, respectively; the data output module 1115 is configured to output one path of encrypted serial data to the serial transmission interface 113.
It should be noted that, in the case that the serial transmission interface 113 and the display unit board 120 are plural, the plural display unit boards 120 are connected to some or all of the plural serial transmission interfaces 113 in a one-to-one correspondence manner. For example, the number of serial transmission interfaces 113 may be m, and the number of display unit boards 120 may be any natural number of 1 or more and m or less. When the number of the display unit boards 120 is n and n < m, the n display unit boards 120 are respectively connected with the n serial transmission interfaces 113 in a one-to-one correspondence manner, that is, the parts are connected in a one-to-one correspondence manner; when the number n=m of the display unit boards 120, the m display unit boards 120 are connected in one-to-one correspondence with the m serial transmission interfaces 113, i.e., all of them are connected in one-to-one correspondence.
In the above manner, the single display unit board 120 (as shown in fig. 1) includes, for example, a serial transmission interface 121, a receiving-end processor 122, a display driving circuit 123, a pixel unit 124, and an intelligent module 125.
The serial transmission interface 121 is connected to the serial transmission interface 113 on the display control card 110, for example, through the serial transmission channel 130, and the encrypted serial data is transmitted to the serial transmission interface 121 through the serial transmission interface 113 via a single cable including the serial transmission channel 130, for example, a shielded twisted pair (STP, shielded Twisted Pair) cable.
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, for example, of a single physical interface structure, including 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, serial advanced technology specification) 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 contained 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 used for decrypting and combining one path of encrypted serial data to convert the encrypted serial data into parallel data containing multiple groups of display data and display control signals. Specifically, as shown in fig. 3a, the receiving-end processor 122 includes a receiving module 1221, a decrypting module 1222, a merging processing module 1223, and an output module 1224. Wherein, the receiving module 1221 is configured to receive one 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 merging processing module 1223 is configured to merge the decrypted serial data into parallel groups of display data and display control signals; the output module 1224 is configured to output the parallel multiple sets of display data and display control signals to the display driving circuit 123 to drive and control the multiple pixel units 124. In this embodiment, by integrating the serialization processing and encryption processing functions on the programmable device 111 of the display control card 110, and matching with the decryption processing and merging processing functions on the receiving end processor 122 of the display unit board 120, the data interaction between the display control card 110 and the display unit board 120 is always in a protected state, so that other image data with unknown sources is prevented from entering the display control system 10, so as to prevent bad information from being displayed on the display unit board 120, and realize the security and high efficiency of data transmission between the display control card 110 and the display unit board 120.
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 second encrypted serial data (referred to as intelligent module data because it will be provided to the intelligent module 125 later) 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, where 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 called intelligent module data because it originates from the intelligent module 125) and then 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 encrypt the single-ended signal data provided by the intelligent module 125 by the encryption module 1226 and then transmit the encrypted single-ended signal data to the serial transmission interface 121 without the signal conversion module 1225.
The display driving circuit 123 includes, for example, a row decoder circuit and a column driving circuit, and even includes a row discharging circuit. The row decoding circuit comprises a row decoder, such as a 3-8 decoder 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, etc.; the row discharge circuit is used to discharge parasitic capacitance on the row line.
The pixel unit 124 is connected to the display driving circuit 123, and the number thereof is usually plural. Each pixel unit 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 red light emitting elements, green light emitting elements, and blue light emitting elements, and of course, the color of each light emitting element 1241 is not limited to the three primary colors of RGB, but may be four primary colors such as RGBY or other multiple colors. More specifically, the plurality of pixel units 124 are arranged in rows and columns, for example, and are connected to the row decoding circuit through a plurality of row lines and to the column driving circuit through a plurality of column lines, and the row discharging circuit is connected to the plurality of row lines, for example, to discharge parasitic capacitances on the respective row lines.
The intelligent module 125 is connected to the receiving processor 122, and is used for performing data interaction with the programmable device 111 through the receiving processor 122, the serial transmission interface 121 and the serial transmission channel 130, and outputting a forward transmission gap of the encrypted serial data in a designated way 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 encrypted serial data (including RGB data and display control signals, for example) of the designated path 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, an MCU or other processor such as ARM, CPU, CPLD or FPGA, and is a chip with data or instruction processing capability, and is usually used in combination 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 for monitoring 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 spot inspection result when the display unit board 120 performs spot inspection; the spot inspection is, for example, to detect each light emitting element 1241 in the pixel unit 124 one by one to determine whether it can be normally lighted.
In this embodiment, the programmable device 111 of the display control card 110 may serialize and encrypt 32 sets of display data and corresponding display control signals into eight paths of encrypted serial data, and correspondingly, eight serial transmission interfaces 113 may be set to connect eight display unit boards 120, and the receiving end processor 122 on each display unit board 120 may decrypt and merge one path of encrypted serial data received by itself to recover 4 sets of parallel display data and corresponding display control signals; alternatively, the programmable device 111 of the display control card 110 may serialize and encrypt 32 sets of display data and corresponding display control signals into four-path encrypted serial data, and correspondingly, four serial transmission interfaces 113 may be set to connect four display unit boards 120, and the receiving end processor 122 on each display unit board 120 may decrypt and merge one path of encrypted serial data received by itself to recover 8 parallel sets of display data and corresponding display control signals; alternatively, the programmable device 111 of the display control card 110 may serialize and encrypt 32 sets of display data and corresponding display control signals into two paths of encrypted serial data, and correspondingly, two serial transmission interfaces 113 may be set to connect two display unit boards 120, and the receiving end processor 122 on each display unit board 120 may decrypt and merge one path of encrypted serial data received by itself to recover 16 parallel sets of display data and corresponding display control signals; alternatively, the programmable device 111 of the display control card 110 may serialize and encrypt 32 sets of display data and corresponding display control signals into one encrypted serial data, and correspondingly, a serial transmission interface 113 may be provided to connect with a display unit board 120, and the receiving end processor 122 on the display unit board 120 may decrypt and merge the encrypted serial data received by itself to recover 32 sets of parallel display data and corresponding display control signals. In this way, the receiving processor 122 can employ custom ICs to provide different decryption and merging capabilities.
In summary, in the first embodiment of the present invention, the algorithm logic in the programmable device 111 on the display control card 110 performs compression encoding such as serializing and the like and encryption processing on multiple sets of display data and display control signals to obtain one or multiple sets of encrypted serial differential signal data, and then sends the encrypted serial differential signal data to the display unit board 120 through a single physical interface structure such as a USB interface or SATA-like interface, and after receiving the encrypted serial differential signal data, the display unit board 120 decrypts and merges the encrypted serial differential signal data by the receiving processor 122 to recover parallel display data and display control signals, and then controls the brightness and darkness states and the brightness and darkness degrees of the multiple pixel units 124 through the display driving circuit 123. In addition, the intelligent module 125 uploads data to the programmable device 111 through the receiving processor 122, the serial transmission interface 121 and the serial transmission channel 130, and outputs the forward transmission interval of the encrypted serial data to the serial transmission interface 113. The embodiment of the invention can reduce the number of the transmission signal lines, improve the stability and anti-interference performance of signals and improve the EMC performance and the bandwidth utilization rate. The provision of the intelligent module 125 is advantageous for the intelligence of the display unit board 120. In addition, the intelligent module 125 uploads data to the display control card 110 through the receiving end processor 122, the serial transmission interface 121 and the serial transmission channel 130 at the interval of forward transmission of the encrypted serial data output by the serial transmission interface 113, and the time division multiplexing mechanism is adopted to enable the uploaded data of the intelligent module 125, multiple groups of display data and display control signals to be transmitted in the same serial transmission channel 130, so that the use of cables can be reduced. In addition, the programmable device 111 is configured with an encryption function, and only the corresponding receiving-end processor 122 can correctly receive and decode the encrypted serial data, so that the introduction of an 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 provided in 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 foregoing first embodiment, so the details of the structure and the function thereof are not described 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 transit card 217 provided with a serial transmission interface 213. The adapter card 217 is also provided with a connector 219, for example. The programmable device 211 is configured to perform serialization and compression encoding and encryption processing on multiple sets of display data and display control signals, and then transmit the one or more sets of encrypted serial data to the corresponding serial transmission interface 213 for output via the connection 219. The scan card 215 is secured to the adapter card 217 via a connector 219. Further, the scan card 215 may be connected to a connector 219 on the adapter card 217 by a gold finger structure.
In addition, as shown in fig. 4 and 5, the adapter card 217 further includes a communication module 218. The communication module 218 is connected to the connector 219. The communication module 218 is used to receive the input image data and send the image data to the programmable device 111 provided on the scan card 215 via the connection 219 for processing. The communication module 218 includes a network transformer 218a and a portal 218b. Network transformer 218a is connected between connector 219 and portal 218b and connects programmable device 211, for example, through a PHY chip disposed on scan card 215. The portal 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 mode adopted in the foregoing first and second embodiments of the present invention, and a single-ended signal serial transmission mode may be adopted, which can also realize the function of high-speed serial data transmission.
Finally, it should be noted that the programmable devices 111/211 in the foregoing 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 of two or more programmable devices, such as FPGAs, respectively. In addition, the display control card in the first and second embodiments is not limited to the multi-circuit board structure formed by the separate components such as the scan card and the switch card, but may be a single-circuit board structure in which all the components on the scan card and all the components on the switch 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. The display control card 310 includes, for example, a programmable device 311 and a serial transmission interface 313. The programmable device 311 performs image processing on the input image data, for example, through internal algorithm logic, so as to obtain multiple sets of display data, generates a display control signal locally, performs serial equal-pressure coding processing and encryption processing on the multiple sets of display data and the display control signal, and obtains one or multiple paths of encrypted serial data, where the serial transmission interface 313 is responsible for outputting one path of encrypted serial data to the display unit board 320 through a unidirectional serial transmission channel 330. It will be appreciated here that in the case where the encrypted serial data is multiplexed, then 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 through the transmission card via the host computer. The image processing is, for example, processing of performing gamma conversion, gradation extraction, or even correction such as brightness or luminance correction on image data. Here, the gradation extraction is, for example, a Bit separation or the like operation, that is, the gradation extraction is typically a manner in which the gradation data after correction processing is subjected to a separation operation per Bit to convert the gradation data into a manner in which different realization weights are given to different bits. The display control signals include, for example, a row scan signal, a clock signal, a latch signal, and an enable control signal (the embodiment of the present invention is not limited thereto, and other control signals, such as a row blanking signal, may be generated as needed). The plurality of sets of display data include, for example, a plurality of sets of RGB data, but may be other display data, for example, RGBY data, RGBW data, which are set according to the display requirements of the display unit board 120. In addition, the programmable device 311 in this embodiment specifically performs serializing processing on multiple sets of parallel data such as display data and display control signals to obtain one or multiple paths of serialized data, and then encrypts the one or multiple paths of serialized data to obtain one or multiple paths of encrypted serial data.
As described above, as shown in fig. 7, the programmable device 311 in the present embodiment specifically includes a data input module 3111, an image processing module 3112, a serializing processing module 3113, an encryption module 3114 and a data output module 3115. The data input module 3111 is mainly used for receiving input image data, and the image data is sent by a sending card through a host 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 serialize the multiple sets of display data and the display control signal to obtain one or multiple paths of serial data; the encryption module 3114 is configured to encrypt the one or more paths of serial data to obtain one or more paths of encrypted serial data, respectively; 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 the serial transmission interface 313 and the display unit board 320 are plural, the plural display unit boards 320 are connected to some or all of the plural serial transmission interfaces 313 in a one-to-one correspondence. For example, the number of serial transmission interfaces 313 may be m, and the number of display unit boards 320 may be any natural number of 1 or more and m or less. When the number of the display unit boards 320 is n and n < m, the n display unit boards 320 are respectively connected with the n serial transmission interfaces 313 in a one-to-one correspondence manner, that is, the parts are connected in a one-to-one correspondence manner; when the number of the display unit boards 320 is n=m, the m display unit boards 320 are connected in one-to-one correspondence with the m serial transmission interfaces 313, i.e., all of them are connected in one-to-one correspondence.
As described above, the single display unit board 320 includes, for example, a serial transmission interface 321, a receiving-end processor 322, a display driving circuit 323, and a pixel unit 324.
The serial transmission interface 321 is connected to the serial transmission interface 313 on the display control card 310, for example, through the serial transmission channel 330, and encrypted serial data is unidirectionally transmitted to the serial transmission interface 321 through the serial transmission interface 313 via a 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 in a single physical interface structure, for example, a USB interface, which supports 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 contained within the single cable, such as a single STP cable.
The two sides of the receiving-end processor 322 are respectively connected with the serial transmission interface 321 and the display driving circuit 323, and are used for decrypting and combining the encrypted serial data so as to convert the encrypted serial data into parallel data containing a plurality of groups of display data and display control signals. Specifically, as shown in fig. 8, the sink processor 322 includes a receiving module 3221, a decrypting module 3222, a merging processing module 3223, and an output module 3224. Wherein, the receiving module 3221 is configured to receive one path of 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 doubling processing module 3223 is configured to perform a doubling process on the decrypted serial data to convert the decrypted serial data into the parallel multiple sets of display data and display control signals; the output module 3224 is configured to output the parallel multiple sets of display data and display control signals to the display driving circuit 323 to drive and control the multiple pixel units 324. In this embodiment, by integrating the serialization processing and encryption processing functions on the programmable device 311 of the display control card 310, and matching with the decryption processing and merging processing functions on the receiving end processor 322 of the display unit board 320, the data interaction between the display control card 310 and the display unit board 320 is always in a protected state, so that the image data from other unknown sources is prevented from entering the display control system 30, so as to prevent the display of bad information on the display unit board 320, and realize the security and high efficiency of data transmission between the display control card 310 and the display unit board 320.
The display driving circuit 323 includes, for example, a row decoder circuit and a column driving circuit, and even includes a row discharging circuit. The row decoding circuit comprises a row decoder, such as a 3-8 decoder 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, etc.; the row discharge circuit is used to discharge parasitic capacitance on the row line.
The pixel unit 324 is connected to the display driving circuit 323, and the number thereof is usually plural. Each pixel unit 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 red light emitting elements, green light emitting elements, and blue light emitting elements, and of course, the color of each light emitting element 3241 is not limited to the three primary colors of RGB, but may be four primary colors such as RGBY or other multiple colors. More specifically, the plurality of pixel units 324 are arranged in rows and columns, for example, and are connected to the row decoding circuit by a plurality of row lines and to the column driving circuit by a plurality of column lines, and the row discharging circuit is connected to the plurality of row lines, for example, to discharge parasitic capacitances on the respective row lines.
In this embodiment, the programmable device 311 of the display control card 310 may serialize and encrypt 32 sets of display data and corresponding display control signals into eight paths of encrypted serial data, and correspondingly, eight serial transmission interfaces 313 may be set to connect eight display unit boards 320, and the receiving end processor 322 on each display unit board 320 may decrypt and merge one path of encrypted serial data received by itself to recover parallel 4 sets of display data and corresponding display control signals; alternatively, the programmable device 311 of the display control card 310 may serialize and encrypt 32 sets of display data and corresponding display control signals into 4-path encrypted serial data, and correspondingly, four serial transmission interfaces 313 may be set to connect four display unit boards 320, and the receiving end processor 322 on each display unit board 320 may decrypt and merge one path of encrypted serial data received by itself to recover 8 parallel sets of display data and corresponding display control signals; alternatively, the programmable device 311 of the display control card 310 may serialize and encrypt 32 sets of display data and corresponding display control signals into two paths of encrypted serial data, and correspondingly, two serial transmission interfaces 313 may be provided to connect two display unit boards 320, and the receiving end processor 322 on each display unit board 320 may decrypt and merge one path of encrypted serial data received by itself to recover 16 parallel sets of display data and corresponding display control signals; alternatively, the programmable device 311 of the display control card 310 may serialize and encrypt 32 sets of display data and corresponding display control signals into one encrypted serial data, and correspondingly, a serial transmission interface 313 may be provided to connect with a display unit board 320, and the receiving end processor 322 on the display unit board 320 may decrypt and merge the encrypted serial data received by itself to recover parallel 32 sets of display data and corresponding display control signals. In this way, the receiving processor 322 may employ custom ICs to provide different decryption and merging capabilities.
In summary, in the third embodiment of the present invention, the algorithm logic in the programmable device 311 on the display control card 310 performs compression encoding and encryption processing on multiple sets of display data and display control signals to obtain one or multiple paths of encrypted serial differential signal data, and then sends the encrypted serial differential signal data to the display unit board 320 through a single physical interface structure, such as a USB interface, and after the display unit board 320 receives the encrypted serial differential signal data, the receiving end processor 322 decrypts and merges the encrypted serial differential signal data to recover the original parallel display data and display control signals, and then the display driving circuit 323 controls the brightness and darkness states and the brightness and darkness degrees of the multiple pixel units 324. The embodiment of the invention can reduce the number of the transmission signal lines, improve the stability and anti-interference performance 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 be further 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 used for level-shifting to output a TTL level signal to the display driving circuit 323. The level shifter 325 is, for example, a device that converts LVCMOS level signals into TTL level signals.
Fourth embodiment
The display control system provided in 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 foregoing third embodiment, so the details of the structure and the function thereof are not described 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 transit 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 serialization and compression encoding and encryption processing on multiple sets of display data and display control signals, and then transmit the one or multiple sets of encrypted serial data to the corresponding serial transmission interface 413 for output through the connection 419. Scan card 415 is secured to adapter card 417 by connector 419. Further, the scan card 415 may be connected to a connector 419 on the adapter card 417 by a gold finger structure. 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 to receive input image data and send the image data to the programmable device 411 disposed on the scan card 415 via the connection 419 for processing. The communication module 418 includes a network transformer and a portal. The network transformer is connected between the connector 419 and the portal and connects 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 foregoing third and fourth embodiments of the present invention, but a single-ended signal serial transmission method may be adopted, and the function of high-speed serial data transmission may be realized.
Finally, it should be noted that the programmable devices in the foregoing 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 of two or more programmable devices, such as FPGAs, respectively. In addition, the display control card in the foregoing embodiment is not limited to the multi-circuit board structure constituted by separate components such as the scan card and the switch card, but may be a single-circuit board structure in which all the elements on the scan card and all the elements on the switch 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: the control card 510 and the display unit board 520 are displayed.
Wherein, the display control card 510 includes: a programmable device 511 and a serial transmission interface 513.
The programmable device 511 is configured to perform image processing on input image data through internal algorithm logic to obtain multiple sets of display data, generate a display control signal locally, and perform serial equal-pressure encoding processing and encryption processing on the multiple sets of display data and the display control signal to obtain one or multiple paths of 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, may serialize and encrypt every 8 sets of display data and corresponding display control signals into one encrypted serial data, may 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 path of encrypted serial data to the display unit board 520 through the serial transmission channel 530. It will be appreciated here that in the case where the encrypted serial data is multiplexed, then a plurality of serial transmission interfaces 513 may be provided accordingly.
Specifically, the input image data is, for example, image data received by the programmable device 511 and transmitted through the transmission card via the host computer. The image processing is, for example, processing of performing gamma conversion, gradation extraction, or even correction such as brightness or luminance correction on image data. Here, the gradation extraction is, for example, a Bit separation or the like operation, that is, the gradation extraction is typically a manner in which the gradation data after correction processing is subjected to a separation operation per Bit to convert the gradation data into a manner in which different realization weights are given to different bits. The display control signals include, for example, a row scan signal, a clock signal, a latch signal, and an enable control signal (the embodiment of the present invention is not limited thereto, and other control signals, such as a row blanking signal, may be generated as needed). The plurality of sets of display data include, for example, a plurality of sets of RGB data, but may be other display data, for example, RGBY data, RGBW data, which are set according to the display requirements of the display unit board 520. Further, the programmable device 511 in the present embodiment specifically obtains serial data after serializing a plurality of sets of parallel data such as display data and display control signals, and then encrypts the serial data to obtain encrypted serial data.
The serial transmission interface 513 is connected to the programmable device 511 and is used for outputting one path of encrypted serial data, for example, it is a single physical interface structure, such as a USB interface, etc., and of course, it may also be other single physical interface structures, for example, a SATA-like interface with dual serial differential channels, etc.
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 the 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 be other single physical interface structures, such as a SATA-like interface with dual serial differential channels, etc.
The display driving circuit 523 may include a row decoder circuit and a column driving circuit, and even include a row discharging circuit. The row decoding circuit comprises a row decoder, such as a 3-8 decoder 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, etc.; the row discharge circuit is used for discharging parasitic capacitance on the row line.
The serial concatenation interface 525 is connected to the receiving processor 522, and is, for example, a single physical interface structure, such as a USB interface, but may be other single physical interface structures, such as a SATA-like interface with 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. The receiving-end processor 522 decrypts and merges the encrypted serial data to convert into parallel sets of display data and display control signals when the received encrypted serial data belongs to the display unit board 520, transfers 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 employ a custom IC, which may restore one encrypted serial data including 4 sets of display data and corresponding display control signals to parallel data, one encrypted serial data including 8 sets of display data and corresponding display control signals to parallel data, one encrypted serial data including 16 sets of display data and corresponding display control signals to parallel data, or one encrypted serial data including 32 sets of display data and corresponding display control signals to parallel data, depending on the degree of the custom function.
The pixel unit 524 is connected to the display driving circuit 523, and the number thereof is usually plural. Each pixel unit 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 plurality of 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 of red light emitting elements, green light emitting elements, and blue light emitting elements, 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 plurality of colors.
In this embodiment, 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 this embodiment requires fewer transmission signal lines, has a higher bandwidth utilization rate, and has higher stability, interference immunity, 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 in common 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.
Wherein the display control card 610 includes: a scan card 615 provided with a programmable device 611, and a switch card 614 provided with a serial transmission interface 613. The adapter card 614 is further provided with a connection member 619, and the scan card 615 is fixed to the adapter card 614 through the connection member 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, generate a display control signal locally, and perform serialization equal-pressure encoding processing and encryption processing on the multiple sets of display data and the display control signal to obtain one or multiple paths of 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, may serialize and encrypt every 8 sets of display data and corresponding display control signals into one encrypted serial data, may 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 path of encrypted serial data to the display unit board 620 through the serial transmission channel 630. It will be appreciated here that in the case where the encrypted serial data is multiplexed, then 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 through the transmission card via the host computer. The image processing is, for example, processing of performing gamma conversion, gradation extraction, or even correction such as brightness or luminance correction on image data. Here, the gradation extraction is, for example, a Bit separation or the like operation, that is, the gradation extraction is typically a manner in which the gradation data after correction processing is subjected to a separation operation per Bit to convert the gradation data into a manner in which different realization weights are given to different bits. The display control signals include, for example, a row scan signal, a clock signal, a latch signal, and an enable control signal (the embodiment of the present invention is not limited thereto, and other control signals, such as a row blanking signal, may be generated as needed). The plurality of sets of display data include, for example, a plurality of sets of RGB data, but may be other display data, for example, RGBY data, RGBW data, which are set according to the display requirements of the display unit board 620. In addition, the programmable device 611 in this embodiment specifically performs serializing processing on a plurality of sets of parallel data such as display data and display control signals to obtain serial data, and then encrypts the serial data to obtain encrypted serial data.
More specifically, as shown in fig. 13, the programmable device 611 in the present 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 for receiving input image data, for example, the image data sent by a sending card through a host computer; the image processing module 6112 is mainly used for performing image processing on the input image data to obtain a plurality of groups of display data and locally generating corresponding display control signals; the serialization processing module 6113 is used for serializing multiple groups of display data and display control signals to obtain one or multiple paths of serial data; the encryption module 6114 is used for respectively carrying out encryption processing on the one or more paths of serial data 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.
The serial transmission interface 613 is connected to the programmable device 611 through a connection 619 and is used for outputting encrypted serial data, and is, for example, a single physical interface structure, such as a SATA-like interface with dual serial differential channels or a single physical interface structure with other multiple serial differential channels.
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.
The serial transmission interface 621 is connected to the serial output interface 613 through the serial transmission channel 630, which is matched to the serial transmission interface 613, and is, for example, a single physical interface structure, such as a SATA-like interface with dual serial differential channels or a single physical interface structure with other multiple serial differential channels.
The display driving circuit 623 may include a row decoder circuit and a column driving circuit, and even include a row discharging circuit. The row decoding circuit comprises a row decoder, such as a 3-8 decoder 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, etc.; the row discharge circuit is used for discharging parasitic capacitance on the row line.
The serial concatenation interface 625 is connected to the receiving processor 622, and is, for example, a single physical interface structure, such as a USB interface, but may be other single physical interface structures, such as a SATA-like interface with dual serial differential channels. Serial transmission interface 613 and serial transmission interface 621 are connected by a single cable, such as an STP cable with dual serial differential transmission channels, and serial transmission channel 630 is contained within 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 comprising a plurality of groups of display data and display control signals, and the other channel is a bidirectional serial transmission channel and is used for data bidirectional interaction between the display control card 610 and the intelligent module 627. It should be noted that, the smart 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. The receiving-end processor 622 decrypts and merges the received encrypted serial data to convert into parallel sets of display data and display control signals when the received encrypted serial data belongs to the display unit board 620, 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 concatenation interface 625 when the received encrypted serial data does not belong to the display unit board 620. For example, the receiving processor 622 may employ a custom IC, which may restore one encrypted serial data including 4 sets of display data and corresponding display control signals to parallel data, one encrypted serial data including 8 sets of display data and corresponding display control signals to parallel data, one encrypted serial data including 16 sets of display data and corresponding display control signals to parallel data, or one encrypted serial data including 32 sets of display data and corresponding display control signals to parallel data, depending on the degree of the custom function.
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 configured to receive 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 is configured to decrypt the encrypted serial data to obtain decrypted data when the encrypted serial data belongs to the display unit board 620. The merging processing module 6224 is connected to the decryption module 6223 and is configured to merge the decrypted data into parallel sets of display data and display control signals. The output module 6225 is connected to the parallel processing module 6224 and is 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 configured to forward the encrypted serial data to the serial concatenation interface 625 when the encrypted serial data does not belong to the display unit board 620.
The pixel unit 624 is connected to the display driving circuit 623, and the number thereof is typically 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 of red light emitting elements, green light emitting elements, and blue light emitting elements, 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 plurality of 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, has a higher bandwidth utilization rate, and has higher stability, interference immunity, 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 in common 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 used for level shifting to output the TTL level signal to the display driving circuit 623. The level shifter 626 converts, for example, LVCMOS level signals to TTL level signals.
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, for example, ARM, CPU, CPLD or FPGA, which has a 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-end processor 642.
The serial transmission interface 641 is used for connecting the serial cascade interface 625 through the serial transmission channel 650 to obtain serial data forwarded by the receiving-end processor 622, and is, for example, a single physical interface structure, such as a USB interface, etc., but may be other single physical interface structures, such as a SATA-like interface with dual serial differential channels, etc.
The pixel unit 644 is connected to the display driving circuit 643, and the number thereof is usually plural. Each pixel unit 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 and control the plurality of pixel units 644 according to the parallel sets of display data and display control signals. Further, the single pixel unit 644 may include any one or a combination of light emitting elements of a plurality of colors of red light emitting elements, green light emitting elements, and blue light emitting elements, 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 plurality of colors.
The display driver circuit 643 is connected to a plurality of pixel cells 644, which may include a row decoder circuit and a column driver circuit, and even include a row discharge circuit. The row decoding circuit comprises a row decoder, such as a 3-8 decoder 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, etc.; the row discharge circuit is used for discharging 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 merge the forwarded encrypted serial data into parallel sets of display data and display control signals when the forwarded encrypted serial data belongs to the display unit board 640, and 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 employ a custom IC, which may restore one encrypted serial data including 4 sets of display data and corresponding display control signals to parallel data, one encrypted serial data including 8 sets of display data and corresponding display control signals to parallel data, one encrypted serial data including 16 sets of display data and corresponding display control signals to parallel data, or one encrypted serial data including 32 sets of display data and corresponding display control signals to parallel data, depending on the degree of the custom function.
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 invention is not limited thereto, and the display unit board 640 may be designed to 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 board 720 including: a serial transmission interface 721, a receiver processor 722, a display driver 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 encrypted serial data including multiple 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-like interface, or a multiple serial differential transmission channel.
The display driving circuit 723 may include a row decoder circuit and a column driving circuit, and even include a row discharging circuit. The row decoding circuit comprises a row decoder, such as a 3-8 decoder 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, etc.; the row discharge circuit is used for discharging parasitic capacitance on the row line.
The serial cascade interface 725 is connected to the receiving processor 722, and is, for example, a single physical interface structure, such as a USB interface, but may be other single physical interface structures, 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 driving 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 merge 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, and 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 concatenation interface 725 when the encrypted serial data does not belong to the display unit board 720.
The pixel unit 724 is connected to the display driving circuit 723, and the number thereof is usually plural. 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-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 employ a custom IC, which may restore one encrypted serial data including 4 sets of display data and corresponding display control signals to parallel data, one encrypted serial data including 8 sets of display data and corresponding display control signals to parallel data, one encrypted serial data including 16 sets of display data and corresponding display control signals to parallel data, or one encrypted serial data including 32 sets of display data and corresponding display control signals to parallel data, depending on the degree of the custom function.
More specifically, the receiver processor 722 includes: the receiving module, the judging 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 configured to receive 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 judging module and is used for decrypting the encrypted serial data to obtain decrypted data when the encrypted serial data belongs to the display unit board 720. 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 used for outputting the parallel multiple sets of display data and display control signals to the display driving circuit 723. The forwarding module is connected to the judging 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 reception side processor 722 and the display driving circuit 723, and is used for level shifting to output a TTL level signal to the display driving circuit 723.
The smart device module 727 is connected to the receiving processor 722, and the smart 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 ARM, CPU, CPLD or FPGA, etc. with a chip having data or instruction processing capability. In addition, in the present embodiment, since the intelligent module 727 is connected to the receiving-end processor 722, as a custom IC, a module similar to a serial differential signal transceiver such as an SP485 chip is required to be disposed inside the receiving-end processor 722. In this embodiment, since the serial cascade interface 725 is provided, 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 including a display control card and a plurality of the aforementioned display unit boards, such as the display unit board 720 shown in fig. 15. The display control card is connected with serial transmission interfaces of a first-stage display unit board in the cascaded display unit boards through serial transmission channels in a single cable.
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 single-ended signals may be adopted, which can also realize the 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 composed of two or more programmable devices such as FPGAs, respectively. In addition, the display control card in the foregoing embodiment is not limited to the multi-circuit board structure constituted by separate components such as the scan card and the switch card, but may be a single-circuit board structure in which all the elements on the scan card and all the elements on the switch card are integrated on the same circuit board. In addition, the scanning card can be connected with the connecting piece on the adapter card through the golden finger structure.
In addition, it is understood that the foregoing embodiments are merely exemplary descriptions of the present application, and the technical solutions of the embodiments may be arbitrarily combined and matched without conflict in technical features and contradiction in structure and without departing from the purpose of the present application.
In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and/or methods may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and the division of the units/modules is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or modules may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units/modules described as separate units may or may not be physically separate, and units/modules may or may not be physically 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 embodiment.
In addition, each functional unit/module in the embodiments of the present invention may be integrated in one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules may be integrated in one unit/module. The integrated units/modules may be implemented in hardware or in hardware plus software functional units/modules.
The integrated units/modules implemented in the form of software functional units/modules described above may be stored in a computer readable storage medium. The software functional units described above are stored in a storage medium and include instructions for causing one or more processors of a computer device (which may be a personal computer, a server, or a network device, etc.) to perform some steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (13)

1. A display control system, comprising:
a display control card comprising:
the programmable device is used for serializing and encrypting a plurality of groups of display data and display control signals to obtain one or more paths of encrypted serial data;
the first serial transmission interface is connected with the programmable device and is used for outputting the appointed path encrypted serial data in the one path or multiple paths of encrypted serial data; and
a display unit board 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 appointed path encrypted serial data through the second serial transmission interface, decrypting and combining the appointed path encrypted serial data to convert the appointed path encrypted serial data into parallel multiple groups of display data and display control signals and transmitting the parallel multiple groups of display data and display control signals to the display driving circuit;
a plurality of pixel units connected to the display driving circuit, wherein the display driving circuit is used for driving and controlling the plurality of pixel units according to the parallel plurality of groups of display data and display control signals;
The display unit board further comprises an intelligent module, and the intelligent module is connected with the second serial transmission interface through the receiving end processor; the serial transmission channel is positioned in a single cable and is a bidirectional serial transmission channel, and the intelligent module is used for carrying out data interaction with the programmable device of the display control card through the bidirectional serial transmission channel in a gap of forward transmission of the specified path encrypted serial data output by the first serial transmission interface.
2. The display control system of claim 1, wherein the programmable device comprises:
a data input module for receiving input image data;
the image processing module is used for carrying out image processing on the input image data to obtain a plurality of groups of display data and generating the display control signals;
the serialization processing module is used for serializing the plurality of 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 carrying out encryption processing on the one or more paths of serial data to obtain one or more paths of encrypted serial data;
and the data output module is used for outputting one path of encrypted serial data in the one path or multiple 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 receiver processor comprises:
the receiving module is used for receiving the appointed-path encrypted serial data from the second serial transmission interface;
the decryption module is used for decrypting the encrypted serial data of the designated path 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 multiple groups of display data and display control signals to the display driving circuit.
4. The display control system of claim 1, wherein the receiver processor comprises:
a receiving module, configured to receive the encrypted serial data of the designated path from the second serial transmission interface and to receive second encrypted serial data from the second serial transmission interface;
the decryption module is used for decrypting the encrypted serial data of the designated 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 multiple 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;
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.
5. The display control system of claim 1, wherein the gap of the forward transmission comprises a black field time slot in the designated path encrypted serial data output by the first serial transmission interface.
6. The display control system of claim 1, wherein the display cell board further comprises an intelligent module, the intelligent module being connected to the second serial transmission interface; the serial transmission channel is positioned in a single cable and comprises a unidirectional serial transmission channel and a bidirectional serial transmission channel, the unidirectional serial transmission channel is used for transmitting the appointed path encrypted serial data to the display unit board, and the bidirectional serial transmission channel is used for data interaction between the intelligent module and the programmable device of the display control card.
7. The display control system of claim 1, wherein the display cell board further comprises:
and the level shifter is connected between the receiving end processor and the display driving circuit and is used for carrying out level shifting so as to output TTL level signals to the display driving circuit.
8. The display control system of claim 1, wherein the display control card comprises an adapter card and a scan card, wherein a connector is provided on the adapter card, the scan card is fixed on the adapter card by the connector, the programmable device is provided on the scan card, and the first serial transmission interface is provided on the adapter card and is connected with the connector; the transfer card also comprises a communication module which 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.
9. The display control system of claim 1, wherein the display cell 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 merge the encrypted serial data to convert the encrypted serial data into parallel groups of display data and display control signals when the received encrypted serial data belongs to the display unit board, and transmit the encrypted serial data to the serial cascade interface when the received encrypted serial data does not belong to the display unit board.
10. The display control system of claim 9, wherein the receiver processor comprises:
the receiving module is used for receiving the appointed-path encrypted serial data from the second serial transmission interface;
the judging module is used for judging whether the received encrypted serial data of the designated path belongs to the display unit board or not;
the decryption module is used for decrypting the specified path encrypted serial data to obtain decrypted serial data when the received specified path encrypted serial data 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 multiple groups of display data and display control signals to the display driving circuit; and
and the forwarding module is used for forwarding the specified path encrypted serial data to the serial cascade interface when the received specified path encrypted serial data does not belong to the display unit board.
11. A display cell board, 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 combining the encrypted serial data to convert the encrypted serial data into parallel multiple groups of display data and display control signals, and transmitting the parallel multiple groups of display data and display control signals to the display driving circuit;
a plurality of pixel units connected to the display driving circuit, wherein each pixel unit includes at least one light emitting element, and the display driving circuit is configured to drive and control the plurality of pixel units according to the parallel plurality of sets of display data and display control signals;
the display unit board further comprises an intelligent module, and the intelligent module is connected with the serial transmission interface through the receiving end processor; the intelligent module group shares a single serial differential transmission channel of the serial transmission interface in a time division multiplexing mode with the input encrypted serial data through the intelligent module group data output by the receiving end processor and the serial transmission interface.
12. The display cell board of claim 11, wherein the display cell board further comprises an intelligent module, and wherein the intelligent module is connected to the serial transmission interface; the intelligent module data output by the intelligent module through the serial transmission interface and the input encrypted serial data respectively use two serial differential transmission channels in the serial transmission interface.
13. The display cell board of any one of claims 11 to 12, wherein the display cell 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 merge the encrypted serial data to convert the encrypted serial data into parallel groups of display data and display control signals to be transmitted to the display driving circuit when the received encrypted serial data of the designated way belongs to the display unit board, and forward the encrypted serial data of the designated way to the serial cascade interface when the received encrypted serial data of the designated way 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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