CN109360528A - A kind of LED advertisement machine control card and its control system - Google Patents
A kind of LED advertisement machine control card and its control system Download PDFInfo
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- CN109360528A CN109360528A CN201811575071.9A CN201811575071A CN109360528A CN 109360528 A CN109360528 A CN 109360528A CN 201811575071 A CN201811575071 A CN 201811575071A CN 109360528 A CN109360528 A CN 109360528A
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The present invention relates to a kind of LED advertisement machine control card and its control systems.The control card includes the first data-interface group, including multiple data-interfaces；First processor (110), for when receiving asynchronous play instruction, the first played data that the controller is locally stored and asynchronous play instruction are transmitted to second processor (120), or receive instruction is played simultaneously when, instruction be played simultaneously be transmitted to the second processor (120) by described；The second processor (120), connect the first processor (110) and the first data-interface group, for receive the asynchronous play instruction when, to first played data carry out processing formed data to be played and by multiple data-interfaces of the first data-interface group export to receive card for show.Control card provided by the invention is not necessarily to HDMI interface, directly receives card using data-interface connection, the cascade of Multistage Control card is realized using data-interface, further decreases the cost of control card.
Description
Technical field
The invention belongs to field of display technology, and in particular to a kind of LED advertisement machine control card and its control system.
Background technique
In recent years, LED display industry continues to develop.The price of LED light is reduced every year with general 30% speed, further
Reduce the display screen price of unit area；With the development of technique, the small spacing of LED is gradually risen, and the LED of current outdoor is shown
The spacing of screen is generally in P3 or so, and the spacing of indoor LED display can accomplish P2.5 even smaller spacing, for unit
The display screen of area further improves resolution ratio and clarity, is suitble to the viewing of short distance；Relative to LCD display,
LED display brightness, clarity are high, can clearly watch over 50 meters；Since LED light is from main light emission, so in phase
With under brightness, energy consumption is lower；The more convenient customization of the size of LED display can accomplish the arbitrary dimensions such as 2 square meters, 3 square meters,
Convenient for being decorated etc. in business display.Therefore, LED display is greatly welcome in commercial situations, and is started from profession
Market, for example be fixedly mounted with, lease is transferred to commercial market and is applied.
In the display application of commercial market, typical application is advertisement machine, this is the landmark of LED display industry
Progress.Because for LED screen body manufacturer, from selling for the semi-finished product in original specialized market, until must arrive scene into
The standardized product of row installation is sold, and for Ping Ti manufacturer, there is more benefit.For example, facilitating processing due to batch
Tail product lamp plate caused by production eliminates the trouble of the secondary installing at scene, opens the blue sea market field in addition to leasing, being fixedly mounted with.
Therefore from the market level, from user level, from manufacturer's level, LED advertisement machine is widely welcome.LED advertisement machine is big
Amount is applied in the business scenarios such as high-speed rail station, airport, fashion chain store, retail shop.In the application of LED advertisement machine, needed with city
Separate unit is wanted to play out, it is also possible to need more to be spliced into a large-size screen monitors and play out, LED display is relative to others after all
For display screen, large-size screen monitors application is its natural advantage, so for the finished product LED advertisement machine of separate unit, user is also wanted to
Large-size screen monitors are combined into play out.LED advertisement machine needs to be played simultaneously in the same local area network or the same region, such as
Airport scene, multiple display screens play same content, rather than play rambling content in the same time.Meanwhile
LED advertisement machine has power control function, and system can be set according to the time, closes the power supply of display screen.It is not needing in this way
When broadcasting, display screen power supply is closed, opens power supply when playing, utmostly carries out energy conservation.It can be seen that LED
Advertisement machine will propose a series of demand to system, meanwhile, one can meet the above crucial requirement simultaneously and have higher sexual valence
The control card scheme of ratio becomes most important for pushing the development of LED advertisement machine.
Existing LED advertisement machine control card usually passes through the HDMI IN inputted video image source of higher level's control card, passes through
HDMI OUT is cascaded in the HDMI IN of next stage control card, realizes the splicing of more LED advertisement machines；Or pass through splice tray
Realize the splicing of more LED advertisement machines.Therefore, the system of each LED advertisement machine, or must all support HDMI IN, HDMI
OUT function, or external connection box must be configured, no matter which kind of mode can all increase additional cost, and the market for reducing advertisement machine is competing
Strive power.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention provides a kind of LED advertisement machine control systems.
An embodiment provides a kind of LED advertisement machine control systems, comprising:
First data-interface group, including multiple data-interfaces；
First processor 110, for when receiving asynchronous play instruction, first that the controller is locally stored to be broadcast
Put data and asynchronous play instruction be transmitted to second processor 120, or receive instruction is played simultaneously when, will be described
Instruction is played simultaneously and is transmitted to the second processor 120；
The second processor 120 connects the first processor 110 and the first data-interface group, for connecing
When receiving asynchronous play instruction, processing is carried out to first played data and forms data to be played and by described first
Multiple data-interfaces of data-interface group are exported to receiving card for display, alternatively, receive it is described instruction is played simultaneously when,
The partial data interface of the first data-interface group is configured to Data Input Interface and receives the second played data and right
Second played data carries out processing and forms data to be played and by the remaining data interface of the first data-interface group
Output to the reception blocks for display.
In one embodiment provided by the invention, the LED advertisement machine control card further includes the second data-interface group, institute
The data-interfaces that the second data-interface group includes two connections are stated, for receiving the data to be played and saturating for receiving card and sending
Reach the LED advertisement machine control card of next stage.
In one embodiment provided by the invention, in the first data-interface group and the second data-interface group
Data-interface be gigabit ethernet interface.
In one embodiment provided by the invention, the LED advertisement machine control card further includes RJ45 interface 150 or USB
Interface 160, the RJ45 interface 150 or the usb 1 60 connect the first processor 110, for receiving described second
Played data, and it is sent to the first processor 110.
In one embodiment provided by the invention, the LED advertisement machine control card further includes HDMI interface 170, described
HDMI interface 170 is connected to the second processor 120, for receiving second played data, and is sent to described second
Processor 120.
In one embodiment provided by the invention, the first processor 110 is also used to broadcast receiving described synchronize
When putting instruction, the input interface of second played data is judged,
If second played data is inputted by the partial data interface of the first data-interface group, described first
Processor 110 send it is described instruction is played simultaneously to the second processor 120, the second processor 120 is by described first
The partial data interface of data-interface group is configured to Data Input Interface and by second described in the partial data interface
Played data；
If second played data is inputted by the RJ45 interface 150 and/or usb 1 60, at described first
Reason device 110 receives second played data, and by second played data and described instruction is played simultaneously is sent to together
The second processor 120；
If second played data is inputted by the HDMI interface, the first processor 110 sends described same
Play instruction is walked to the second processor 120, the second processor 120 receives described second by the HDMI interface and broadcasts
Put data.
In one embodiment provided by the invention, the LED advertisement machine control card further includes synchronous asynchronous switching key
130, it is connected to the first processor 110, for switching the play mode of LED advertisement machine.
In one embodiment provided by the invention, the LED advertisement machine control card further includes brightness volume adjustment button
140, it is connected to the first processor 110, for adjusting the volume and brightness of LED advertisement machine.
Another embodiment of the present invention provides a kind of LED advertisement machine control system, including it is host computer, multiple as above-mentioned
The LED advertisement machine control card that any one embodiment provides, multiple reception cards and multiple LED displays；Wherein, multiple
The LED advertisement machine control card and multiple reception cards are connect by the first data-interface group and second data
Mouth group is cascaded, and the host computer is attached with multiple LED advertisement machine control cards respectively.
Compared with prior art, LED advertisement machine control card provided by the invention at least has the following beneficial effects:
1) it is not necessarily to HDMI interface, directly receives card using data-interface connection, realizes Multistage Control card using data-interface
Cascade；
2) between many motors control card, the transmission and control of control command signal are carried out by data connection mouth, with closing
Position machine software, is easy to implement being uniformly controlled for control command；
3) separate unit advertisement machine independent play-out may be implemented or more splicings play；
4) external source for providing external played data is not limited to computer, can be to be set by the broadcasting that HDMI interface extends
It is standby.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of LED advertisement machine control card provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of another kind LED advertisement machine control card provided in an embodiment of the present invention；
Fig. 3 is a kind of LED advertisement machine control system Multi-Machine Synchronous schematic diagram provided in an embodiment of the present invention；
Fig. 4 is another kind LED advertisement machine control system Multi-Machine Synchronous schematic diagram provided in an embodiment of the present invention；
Fig. 5 is another LED advertisement machine control system Multi-Machine Synchronous schematic diagram provided in an embodiment of the present invention.
Specific embodiment
Further detailed description is done to the present invention combined with specific embodiments below, but embodiments of the present invention are not limited to
This.
Embodiment one
Referring to Figure 1 and Fig. 2, Fig. 1 are a kind of schematic diagram of LED advertisement machine control card provided in an embodiment of the present invention；Fig. 2
For the schematic diagram of another kind LED advertisement machine control card provided in an embodiment of the present invention.Specifically, which may include:
First data-interface group, including multiple data-interfaces；
First processor 110, for when receiving asynchronous play instruction, first that the controller is locally stored to be broadcast
Put data and asynchronous play instruction be transmitted to second processor 120, or receive instruction is played simultaneously when, will be described
Instruction is played simultaneously and is transmitted to the second processor 120；
The second processor 120 connects the first processor 110 and the first data-interface group, for connecing
When receiving asynchronous play instruction, processing is carried out to first played data and forms data to be played and by described first
Multiple data-interfaces of data-interface group are exported to receiving card for display, alternatively, receive it is described instruction is played simultaneously when,
The partial data interface of the first data-interface group is configured to Data Input Interface and receives the second played data and right
Second played data carries out processing and forms data to be played and by the remaining data interface of the first data-interface group
Output to the reception blocks for display.
Wherein, the LED advertisement machine control card further includes the second data-interface group, and the second data-interface group includes two
The data-interface of a connection, the LED advertisement machine for receiving the data to be played for receiving card transmission and being pass-through to next stage
Control card.
Wherein, the data-interface in the first data-interface group and the second data-interface group is gigabit ether
Network interface.
Wherein, the LED advertisement machine control card further includes RJ45 interface 150 or usb 1 60, the RJ45 interface 150
Or the usb 1 60 connects the first processor 110, for receiving second played data, and is sent to described
One processor 110.
Wherein, the LED advertisement machine control card further includes HDMI interface 170, and the HDMI interface 170 is connected to described
Two processors 120 for receiving second played data, and are sent to the second processor 120.
Wherein, the first processor 110 be also used to receive it is described instruction is played simultaneously when, judge that described second broadcasts
The input interface of data is put,
If second played data is inputted by the partial data interface of the first data-interface group, described first
Processor 110 send it is described instruction is played simultaneously to the second processor 120, the second processor 120 is by described first
The partial data interface of data-interface group is configured to Data Input Interface and by second described in the partial data interface
Played data；
If second played data is inputted by the RJ45 interface 150 and/or usb 1 60, at described first
Reason device 110 receives second played data, and by second played data and described instruction is played simultaneously is sent to together
The second processor 120；
If second played data is inputted by the HDMI interface, the first processor 110 sends described same
Play instruction is walked to the second processor 120, the second processor 120 receives described second by the HDMI interface and broadcasts
Put data.
Wherein, the LED advertisement machine control card further includes synchronous asynchronous switching key 130, is connected to first processing
Device 110, for switching the play mode of LED advertisement machine.
Wherein, the LED advertisement machine control card further includes brightness volume adjustment button 140, is connected to first processing
Device 110, for adjusting the volume and brightness of LED advertisement machine.
The present embodiment realizes the cascade of Multistage Control card by using data-interface, can reduce at low cost；
Control card provided in this embodiment, when advertisement machine splicing is used together, since what is used is not that HDMI connects
Mouthful, but therefore gigabit network interface can either transmit image data, and can transmit control command, it can be in many motors control card grade
When connection splicing, carries out the unified of brightness, volume etc. and adjust；
Control card provided in this embodiment had both supported the transmission of video image, also supported the transmitting of control command simultaneously；
Control card provided in this embodiment increases equipment without additional, can be completed more advertisement machines splicing play with
Independent play-out.
Embodiment two
Fig. 3~Fig. 5 is referred to, and is a kind of LED advertisement provided in an embodiment of the present invention with continued reference to Fig. 1 and Fig. 2, Fig. 3
Machine control system Multi-Machine Synchronous schematic diagram；Fig. 4 is that another kind LED advertisement machine control system multimachine provided in an embodiment of the present invention is same
Walk schematic diagram；Fig. 5 is another LED advertisement machine control system Multi-Machine Synchronous schematic diagram provided in an embodiment of the present invention.The control
Card includes:
As shown in Figure 1, first processor 110, second processor 120, the first data-interface group and the second data-interface
Group, second processor 120 are connected to first processor 110, include multiple data-interfaces, data-interface in the first data-interface group
It is connected to second processor 120, includes two mutually direct-connected data-interfaces in the second data-interface group；First processor
110 are used to receive internal played data, and for receiving external played data；Second processor 120 is for receiving at first
Manage device 110 send inside played data or external played data, second processor 120 can be to internal played data at
Form data to be played after reason, second processor 120 can also be to external played data according to forming number to be played after handling
According to；The Data Concurrent to be played that data-interface in first data-interface group is used to receive the transmission of second processor 120 is sent to connecing
Card is received, be also used to receive the control command that first processor 110 is sent by second processor 120 and is sent to reception card, with
And for receive second processor 120 transmission data and control command to be played and be sent to the first of next stage control card
Data-interface group；Data-interface in second data-interface group, the data to be played for that will receive card transmission loop back to next
To realize the cascade of Multistage Control card, specific implementation is grade control card, one of data-interface receive that card sends to
The data to be played are sent to next stage control card by played data, another data-interface.
Preferably, the data-interface in the present embodiment in the first data-interface group and the second data-interface group is gigabit
Ethernet interface, the generally data bandwidth of 1Gbit.
Preferably, first processor 110 can be ARM or CPU in the present embodiment, and the video of hardware is supported to decode energy
Power, such as 1080P hard decoder, 4K video hard decoder, second processor 120 can be FPGA.
In addition, as shown in Fig. 2, the control card in the present embodiment can also include at least RJ45 interface 150 and USB interface
One of 160, RJ45 interface and USB interface are connected to first processor 110, are used for real-time reception external played data,
And it is sent to first processor 110；Data-interface in the first data-interface group of the present embodiment also can receive external played
Data, and be sent to second processor 120 and handled.
Further, as shown in Fig. 2, control card in the present embodiment can also include synchronous asynchronous switching key 130, it is bright
Volume adjustment button 140 is spent, is connected to the first processor 110, synchronous asynchronous switching key is for switching LED advertisement machine
Play mode, brightness volume adjustment button, for adjusting the volume and brightness of LED advertisement machine.
The present embodiment is as Fig. 3~more advertisement machines shown in fig. 5 splicing illustrates the present invention the control card of proposition
Working principle.The present embodiment includes 4 data-interfaces with the first data-interface group, and the second data-interface group includes that 2 data connect
For mouthful, 4 data-interfaces of the first data-interface group are respectively data-interface 1, and data-interface 2, data-interface 3, data connect
Mouth 4；2 data-interfaces of the second data-interface group are respectively data-interface 5, data-interface 6.Wherein, data-interface 5 and 6 is straight
Even, data-interface 1-4 is connected to FPGA, this 6 data-interface maximums can be with the display screen for carrying 1,300,000 elemental areas.
Further, the data-interface 1 of current control card 1 is connected to reception card 1, receives card 1 and is connected to reception card 2, receives 2 connection of card
To card 3 is received, the data-interface 5 that card 3 is connected to control card is received, receiving card 1-3, band carries a display screen jointly.Current control
The data-interface 6 of card 1 is connected to the data-interface of next stage control card, can be any one in data-interface 2-4, so far
Realize the cascade of two control cards.
As shown in figure 3, that is, broadcast source is internal played data when the mode of first order control card is asynchronous mode, this
When, data-interface 1-4 is data output interface, reads the inside stored in control card by PC control arm processor
Played data, and it is sent to FPGA together with control command, the internal played data of FPGA processing forms data to be played, will be wait broadcast
It puts data and control command and sending card 1-3 is sent to by data-interface 1, sending card 3 orders data to be played and control
The data-interface 5 for being sent to current control card is enabled to be pass-through to data to be played and control command by data-interface 5 and 6
Next stage control card completes the winding of data.Correspondingly, the mode of rear class control card is synchronous mode.
As shown in figure 4, that is, broadcast source is external played data when the mode of first order control card is synchronous mode, on
After position machine software compresses played data, inputted by RJ45 mouthfuls or USB interface, according to the realization mechanism of actual FPGA
And the realization mechanism of host computer is different, can also be inputted by data-interface 2.When passing through RJ45 mouthfuls or USB interface
When external played data, external played data are received by PC control arm processor, and be sent to together with control command
The internal played data of FPGA, FPGA processing forms data to be played.The input of external played data is carried out when passing through data-interface 2
When, external played data are sent to FPGA by data-interface 2, and the internal played data of FPGA processing forms data to be played.FPGA
Data to be played and control command are sent to sending card 1-3 by data-interface 1, sending card 3 by data to be played and
Control command is sent to the data-interface 5 of current control card, by data-interface 5 and 6, by data to be played and control command
It is pass-through to next stage control card, completes the winding of data.Correspondingly, the mode of rear class control card is synchronous mode.
Further, in the above example, the synchronous asynchronous switching key of control card, brightness volume adjustment button, communication
RJ45 interface, USB interface and data-interface 2,3,4,6 are arranged at the side of pcb board, and data connection mouth 1,5 settings exist
Other side.Not only facilitate control card to be installed to advertisement machine box house, but also facilitates advertisement machine cabinet aperture.
Further, as shown in Figure 5.The present embodiment can not have to according to the cascade size of advertisement machine, data-interface 3,4,
Then there was only data connection mouth 1,2,5,6；Maximum belt carries the display screen of 1,300,000 elemental areas.When needs band carries bigger pixel faces
When long-pending display screen, the data-interface 3 of current control card can be connected to the data-interface 2 of next stage control card, it can also be with
Continue the data-interface 2 that the data-interface 4 of current control card is connected to rear class control card.
It should be noted that control card provided in this embodiment can also include HDMI interface 170, it is connected to FPGA, is used
It send in receiving external played Data Concurrent to FPGA.It can be seen that the external played data in the present embodiment can be computer, also
The playback equipment that can be HDMI interface to extend, such as TV box.
As shown in Fig. 2, the cascade of control card is not necessarily to HDMI interface in the present embodiment, can directly be connected using data-interface
Receive card；
Between the present embodiment many motors control card, the control of control command is carried out by data-interface, cooperation host computer is soft
Part can easily realize the unification of control command, play convenient for separate unit advertisement machine independent play-out or more splicings.
The present embodiment also provides a kind of LED advertisement machine control system, the control card including the description of multiple above-described embodiments, more
A reception card and multiple display screens；Multiple control cards and multiple receptions card pass through the first data-interface group and the second data
Interface group is cascaded.
The above content is the specific preferred embodiments of combination to a kind of LED advertisement machine control system institute provided by the invention
The further description of work is, and it cannot be said that specific implementation of the invention is only limited to these instructions.For skill belonging to the present invention
For the those of ordinary skill in art field, without departing from the inventive concept of the premise, can also make it is several it is simple deduction or
Replacement, all shall be regarded as belonging to protection scope of the present invention.
Claims (9)
1. a kind of LED advertisement machine control card characterized by comprising
First data-interface group, including multiple data-interfaces；
First processor (110), for when receiving asynchronous play instruction, first that the controller is locally stored to be played
Data and asynchronous play instruction are transmitted to second processor (120), or receive instruction is played simultaneously when, will be described
Instruction is played simultaneously and is transmitted to the second processor (120)；
The second processor (120) connects the first processor (110) and the first data-interface group, for connecing
When receiving asynchronous play instruction, processing is carried out to first played data and forms data to be played and by described first
Multiple data-interfaces of data-interface group are exported to receiving card for display, alternatively, receive it is described instruction is played simultaneously when,
The partial data interface of the first data-interface group is configured to Data Input Interface and receives the second played data and right
Second played data carries out processing and forms data to be played and by the remaining data interface of the first data-interface group
Output to the reception blocks for display.
2. LED advertisement machine control card according to claim 1, which is characterized in that it further include the second data-interface group, it is described
Second data-interface group includes the data-interface of two connections, for receiving the data to be played and transparent transmission for receiving card transmission
To the LED advertisement machine control card of next stage.
3. LED advertisement machine control card according to claim 2, which is characterized in that the first data-interface group and institute
The data-interface stated in the second data-interface group is gigabit ethernet interface.
4. LED advertisement machine control card according to claim 1, which is characterized in that further include RJ45 interface (150) or USB
Interface (160), the RJ45 interface (150) or the USB interface (160) connect the first processor (110), for receiving
Second played data, and it is sent to the first processor (110).
5. LED advertisement machine control card according to claim 4, which is characterized in that it further include HDMI interface (170), it is described
HDMI interface (170) is connected to the second processor (120), for receiving second played data, and is sent to described
Second processor (120).
6. LED advertisement machine control card according to claim 5, which is characterized in that the first processor (110) is also used to
Receive it is described instruction is played simultaneously when, judge the input interface of second played data,
If second played data is inputted by the partial data interface of the first data-interface group, first processing
Described in sending instruction is played simultaneously to the second processor (120) in device (110), and the second processor (120) is by described the
The partial data interface of one data-interface group is configured to Data Input Interface and by described in the partial data interface
Two played datas；
If second played data is inputted by the RJ45 interface (150) and/or USB interface (160), at described first
It manages device (110) and receives second played data, and by second played data and described instruction is played simultaneously sends together
To the second processor (120)；
If second played data is inputted by the HDMI interface, the first processor (110) sends the synchronization
Play instruction to the second processor (120), the second processor (120) receives described second by the HDMI interface
Played data.
7. LED advertisement machine control card according to claim 1, which is characterized in that further include synchronous asynchronous switching key
(130), the first processor (110) are connected to, for switching the play mode of LED advertisement machine.
8. LED advertisement machine control card according to claim 1, which is characterized in that further include brightness volume adjustment button
(140), the first processor (110) are connected to, for adjusting the volume and brightness of LED advertisement machine.
9. a kind of LED advertisement machine control system, which is characterized in that including host computer, multiple such as claim 1-8 any one institute
State LED advertisement machine control card, multiple reception cards and multiple LED displays；Wherein, multiple LED advertisement machine control cards with
And multiple reception cards are cascaded by the first data-interface group and the second data-interface group, it is described upper
Machine is attached with multiple LED advertisement machine control cards respectively.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111930327A (en) * | 2020-07-27 | 2020-11-13 | 苏州仰邦软件科技有限公司 | LED mirror screen display method and device |
| CN113938630A (en) * | 2021-10-08 | 2022-01-14 | 浙江大华技术股份有限公司 | Control method of LED display screen and display screen group |
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| CN113938630B (en) * | 2021-10-08 | 2024-04-26 | 浙江大华技术股份有限公司 | Control method of LED display screen and display screen group |
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