CN101609645B - LED display screen control system - Google Patents
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- CN101609645B CN101609645B CN2009101074270A CN200910107427A CN101609645B CN 101609645 B CN101609645 B CN 101609645B CN 2009101074270 A CN2009101074270 A CN 2009101074270A CN 200910107427 A CN200910107427 A CN 200910107427A CN 101609645 B CN101609645 B CN 101609645B
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Abstract
The invention relates to an LED display screen control system. The LED display screen control system comprises an upper computer, a system front end, a system rear end and an LED display screen which is connected with the system rear end. The system front end is connected with the system rear end by a power line, data signals transmitted by the upper computer are converted into carrier signals by the system front end which transmits the data signals and the carrier signals to the system rear end by the power line, and the system rear end transmits the processed signals to the LED display screen and drives the LED display screen to display output. The system front end converts the data signals of the upper computer into the carrier signals by the carrier communication technology, transmits the carrier signals to the system rear end and the LED display screen by the power line and simultaneously supplies power to the LED display screen; and only the power line is arranged between the system rear end and the system front end for connecting communication and other communication interfaces are unnecessary, thus simplifying structural design, reducing connectors and signal lines, and improving product safety and stability.
Description
Technical field
The present invention relates to a kind of display screen control system, relate in particular to a kind of LED display control system.
Background technology
Existing LED display control system generally comprises host computer, primary controller, LED display.LED display is obtained data-signal such as vision signal by data line from host computer, and LED display need be provided with power lead from outside three-phase alternating-current supply power taking simultaneously.Host computer can be different interface devices, if LED display needs to obtain vision signal from different host computers, needs to be provided with a plurality of different communication interfaces and connector on LED display.Thereby make the signal wire of existing LED display more, need the connector that is provided with more, cause structural design complicated, and connector goes wrong and all can cause the display effect of whole LED display screen arbitrarily, influences the stability in use of LED display greatly.Particularly carrying out the big screen LED display screen shows when exporting, a plurality of screen bodies need be set, when particularly relating to nearly the large screen display output that tens even hundreds of, several thousand unit LEDs display screens form, can cause data line and power lead too much, cause installation connection procedure complexity huge, simultaneously because the too much stability of data signal transmission largely of data line, power lead and connector influence the demonstration use of LED display.
Be called as notification number " CN201037989Y " name in the Chinese utility application prospectus " all-colour LED display control unit synchronously " patent disclosure a kind of LED screen display control program, system mainly comprises the master control borad that is connected with by the host computer control bus, the HUB scanning card, the LED display bus module, each is made of master control borad and HUB scanning card a FPGA or CPLD chip circuit, the fpga chip input end of master control borad connects the video card output port, the fpga chip circuit output end of HUB scanning card connects the LED display bus port, host computer control system bus connects the interface circuit of master control borad and HUB scanning card fpga chip, and LED display port and driving circuit connect LED display.The LED display of this LED display display control program is carried out data signal transmission by netting twine and host computer, need on LED display, to be provided with the power lead power taking from outside three-phase supply that is connected with outside three-phase supply simultaneously, thereby make data line and power lead too much, cause installation connection procedure complexity huge, simultaneously because the too much stability of data signal transmission largely of data line, power lead and connector influence the demonstration use of LED display.
Summary of the invention
The technical problem to be solved in the present invention provides that a kind of structural design is simple, stability in use LED screen display control program preferably.
The present invention is achieved through the following technical solutions:
A kind of LED display control system of the present invention,
It comprises: host computer, be connected the system front end of communication with host computer, be connected the system rear end of communication with system front end and be connected the LED display of communication with the system rear end, described system front end is connected by power lead with the system rear end, the data-signal that described host computer transmits converts carrier signal to by system front end, described system front end is transferred to the system rear end by power lead with power supply signal and carrier signal, and the signal after described system will handle the rear end is transferred to LED display and the driving LED display screen shows output;
Described system front end comprises processor and the carrier module that is connected with processor, and the data signal transmission of described host computer gives processor processing after carrier module converts carrier signal to;
Described system front end comprises primary controller and the divider that is connected with primary controller, processor comprises and is arranged on the primary processor in the primary controller and is arranged on divisional processing device in the divider, primary controller further comprises the storer that is connected with the primary processor communication, be connected communication with primary processor and the data-signal of host computer is converted to the optic module of fiber-optic signal, described carrier module is arranged in the divider and with the divisional processing device and is connected communication, and the fiber-optic signal that described divider after handling by divisional processing device and carrier module transmits primary controller converts carrier signal output to.
Further improvement as such scheme, wherein, described system front end further comprises the transformer that is connected with external power source, the wave filter that is connected with transformer and output port, described system handles the power supply signal that external power source provided successively through transformer, wave filter, described system front end is exported carrier signal and alternating current simultaneously by output port and is transferred to the system rear end by power lead.
Further improvement as such scheme, wherein, the output port that described system front end is connected with end communication after the system is provided with a plurality of, described system front end converts the three-phase alternating current that outside three-phase alternating-current supply provided to single-phase alternating current, and described system front end is distributed to carrier signal and single-phase alternating current each output port and exported to the system rear end by power lead simultaneously.
Further improvement as such scheme, wherein, described LED display comprises screen body and the display driver circuit that is connected with the screen body, described system rear end is arranged in the LED display and with display driver circuit and is connected, described system rear end comprises the Switching Power Supply that is connected with display driver circuit and the unit controls circuit that is connected with Switching Power Supply, and described unit controls Circuits and Systems front end connection also converts the carrier signal of system front end to Transistor-Transistor Logic level.
Further improvement as such scheme, wherein, described system front end flows to each unit LEDs display screen with power supply signal and carrier signal by system's rear end distribution, power supply between described each unit LEDs display screen is for being connected in parallel, described system front end distributes between the carrier signal that flows to each unit LEDs display screen for being connected in parallel, and described unit controls circuit is divided into two paths of signals with power supply signal that power lead transmits simultaneously and carrier signal to be transmitted.
Further improvement as such scheme, wherein, described unit controls circuit comprises power management module and the signal processing module that is connected with power management module, the power supply signal that described power management module transmits system front end converts direct current to and offers signal processing module, described signal processing module comprises back-end processor, the physical-layer carrier chip that is connected communication with back-end processor reaches and second transformer, the carrier signal of described system front end transmission is successively through second transformer, convert Transistor-Transistor Logic level to and be transferred to back-end processor after the physical-layer carrier chip is handled and handle, the carrier signal after back-end processor will be handled is transferred to display driver circuit and drives the demonstration of screen body.
As the further improvement of such scheme, wherein, described system rear end is connected communication with divider by power lead, and described divider is exported to the system rear end with carrier signal and power supply signal by power lead simultaneously.
Further improvement as such scheme, wherein, described system front end comprises main embedded system and main carrier physical chip, described system rear end is arranged in the LED display, described LED display further comprises display driver circuit and screen body, described system rear end comprise according to side signal transmission to be provided with from the carrier wave physical chip, back embedded system, the unit controls circuit, described unit controls circuit is connected communication with display driver circuit, and described host computer is preserved data signal transmission and control LED display by main embedded system and decode to main embedded system, play.
A kind of LED display control system of the present invention, the system rear end is connected communication by power lead with system front end, system front end utilizes carrier communication that the data-signal of host computer is converted to carrier signal and is transferred to system rear end and LED display by power lead, and LED display is given in power supply simultaneously.Only power lead need be set between system rear end and the system front end and be connected, other communication interfaces need be set, the design that simplifies the structure has reduced the quantity of connector and signal wire, lifting security of products and stability in use.
Description of drawings
In order to be easy to explanation, the present invention is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is a flow process principle schematic of the present invention;
Fig. 2 is the structural representation of system front end of the present invention;
Fig. 3 is the structure of system of the present invention rear end and the synoptic diagram that is connected with system front end;
Fig. 4 is the flow process principle schematic after system front end of the present invention is divided into primary controller and divider two parts;
Fig. 5 is the structural principle synoptic diagram of the primary controller of system front end of the present invention;
Fig. 6 is the structural principle synoptic diagram of the divider of system front end of the present invention;
Fig. 7 be system of the present invention rear end the unit controls circuit structural principle and with the synoptic diagram of the annexation of divider;
Fig. 8 is the asynchronous display system principle framework of a LED display of the present invention synoptic diagram.
Embodiment
See also Fig. 1 to shown in Figure 7, a kind of LED display control system of the present invention, it comprises: host computer, system front end, system rear end and LED display.Described host computer is connected communication with system front end and data information transfer is handled to system front end.Host computer can be given system front end by mode transmission of data signals such as network signal line, video signal cable or wireless transmission.Data-signal comprises video information and control information.Host computer, system front end, system rear end all are connected with external power source respectively, can be three-phase alternating-current supply, single phase alternating current power supply or direct supply etc.Because general household electricity is the 110V-220V three-phase alternating-current supply all, adopt three-phase alternating-current supply to describe in this enforcement.The structure setting of host computer, system front end, system rear end is to design according to the employing three-phase alternating-current supply in the present embodiment, is connected with the power supply of other patterns if adopt, and structure is made the change that adapts, and does not repeat them here.
Host computer can be equipment and the components and parts that computing machine, DVD, external memory storage, video card or DVI video source etc. can provide video information.Described system front end is connected by power lead with the system rear end, and power lead can adopt AC power cord, also can adopt direct current supply line.Described system front end is connected with external power source.The system rear end can be provided with separately in addition, also can be arranged in the LED display.Employing is arranged on the system rear end in the LED display and describes in the present embodiment, and each unit LEDs display screen all is provided with a system rear end.
See also shown in Figure 2ly, described system front end comprises processor, the carrier module that is connected with processor, transformer, wave filter and output port.The data-signal of described host computer (as vision signal and control signal) is transferred to processor processing and exports to the system rear end after carrier module converts carrier signal to.Described system front end is connected with external power source, by AC power cord or direct current supply line power supply signal is transferred to the system rear end with being transformed into carrier wave alternating current or carrier wave direct current after the external power source signal Processing.Described system front end is handled the power supply signal that external power source provided through AFE (analog front end) (AFE), transformer, wave filter.Described system front end is exported carrier signal and alternating current simultaneously by output port and is transferred to the system rear end by power lead.After handling the power supply signal that received and carrier signal, described system rear end is transferred to LED display and the driving LED display screen shows output.Processor is used to handle the video information of host computer and control information and converts the data-signal of host computer to carrier signal with the carrier module acting in conjunction.
As shown in Figure 2, the process chip of system front end can be provided with processor chips (as the FPGA processor) separately and directly is connected direct data-signal to host computer with carrier module and carries out information processing in the present embodiment.To shown in Figure 6, the process chip of system front end also can be handled with two processor chips that are provided with respectively of primary processor (as the FPGA processor) and divisional processing device (as the FPGA processor) are set by the process information different mining as Fig. 4.
The output port that described system front end is connected with end communication after the system is provided with a plurality of, described system front end is connected the three-phase alternating current that outside three-phase alternating-current supply is provided with outside three-phase supply and converts single-phase alternating current to, and described system front end is distributed to carrier signal and single-phase alternating current each output port and exported to the system rear end by power lead simultaneously.
As shown in Figure 2, the system front end of present embodiment can be arranged to parts and carry out information processing.To shown in Figure 6, the process chip of system front end also can be arranged to primary controller and two independent parts of divider respectively according to the information difference of handling (promptly different with the position that the divisional processing device is provided with by primary controller) in the present embodiment as Fig. 4.Described primary processor is arranged in the primary controller, and described divisional processing device is arranged in the divider.Described carrier module is arranged in the divider and with the divisional processing device and is connected communication, and the fiber-optic signal that described divider after handling by divisional processing device and carrier module transmits primary controller converts carrier signal output to.
See also shown in Figure 4ly, primary controller comprises primary processor, the storer, optic module, the communication interface module that are connected with the primary processor communication.Primary processor can adopt handling components able to programme such as field programmable gate array (FPGA), CPLD (CPLD) or process chip etc.Present embodiment adopts field programmable gate array (FPGA) to describe, and adopts FPGA to describe below.
Communication interface module is connected with the primary processor communication, and the video information that receives host computer sends primary processor to and carries out processing controls.Communication interface module can be USB interface, S-Video interface, composite video interface, milky way interface, AV interface, digital video (Digital Visual Interface is called for short DVI) interface, high-definition media interface video interfaces such as (HDMI).
Storer comprises nonvolatile memory, internal memory.Nonvolatile memory is connected with the primary processor communication by memory bus, the canned data in the nonvolatile memory is transferred to primary processor handles.Internal memory is connected with the primary processor communication by data bus and address bus.
Optic module is connected communication and the data-signal of host computer such as vision signal is converted to fiber-optic signal output and be transferred to divider with primary processor.
Primary controller can be connected and obtain data-signal by USB interface transmission and host computer (as computing machine, be with the storer of USB etc.), and the data signal transmission of being obtained is carried out processing controls to primary processor.Primary controller also can be connected and obtain data-signal by DVI interface and host computer (as the DVI video etc.), and the DVI video information of being obtained is transferred to primary processor and controls, manages after DVI video receiving device is handled.Primary controller also can be connected with upper machine communication by other communication interfaces and obtains data-signal.
See also Fig. 4 to shown in Figure 6, divider is connected communication with the primary controller communication, receives the fiber-optic signal that primary controller transmits by optical cable.Divider comprises divider optic module, divisional processing device, carrier module, AFE (analog front end) (AFE), transformer, wave filter, input port, output port.The divisional processing device can adopt handling components able to programme such as field programmable gate array (FPGA), CPLD (CPLD) or process chip etc.Present embodiment adopts field programmable gate array (FPGA) to describe.Input port comprises optic fibre input end mouth and three-phase alternating-current supply input port.Adopt high speed carrier processing chip as carrier processing chip in the carrier module present embodiment up to 200M.
Divider is connected power supply by the three-phase power input end mouth with outside three-phase alternating-current supply.Outside three-phase alternating-current supply can adopt the three-phase alternating-current supply of 110-220V used in everyday.The three-phase alternating current that three-phase alternating-current supply provided is handled through transformer, wave filter successively, converts single-phase alternating current to and exports through output port.
The optic module of primary controller converts the vision signal of host computer fiber-optic signal output to and is defeated by the divider optic module by the optic fibre input end oral instructions of divider.The divider optic module converts the fiber-optic signal that receives to carrier signal through divisional processing device, carrier module successively.Described carrier signal and single-phase alternating current are exported by output port simultaneously.
Adopt power line communication (being power line communication) (PowerLine Communication is called for short PLC) to carry out communication between divider and the LED display.Power line communication (Power Line Communication, be called for short PLC) utilize modulation techniques such as GMSK or OFDM that data-signal is modulated, on power lead, transmit then, data-signal leaches modulation signal through wave filter, pass through demodulation again, just can obtain the video information that host computer is exported.The described power supply flow between each unit LEDs display screen of being distributed by divider is for being connected in parallel, described by the divider distribution flow between each unit LEDs display screen with data-signal for being connected in parallel.
Divider is provided with a plurality of output ports.The output port of divider is connected with the LED display communication by power lead.
Divider is handled the fiber-optic signal that three-phase alternating current and primary controller provided that outside three-phase alternating-current supply provided simultaneously and is distributed into the multichannel single-phase alternating current and carrier signal is exported to LED display through output port.
It is corresponding that divider is handled the quantity that the quantity of distribution and output port be provided with three-phase alternating current that outside three-phase alternating-current supply provided and the fiber-optic signal that primary controller is provided.Each output port can connect a LED display, carries single-phase alternating current and carrier signal to go out to LED display simultaneously by output port.Thereby LED display is connected with divider with output port by AC power cord and is connected communication.Carry single-phase alternating current and carrier signal to realize communication simultaneously by AC power cord, provide video information to show output when powering for LED display for LED display to LED display.
Described primary controller is connected communication with host computer, obtains data-signal such as video information, control information from host computer.LED display is connected communication by power lead with divider.
As Fig. 3 and shown in Figure 7, LED display comprises screen body, display driver circuit and system rear end.Described system rear end comprises the Switching Power Supply that is connected with the screen body, the unit controls circuit that is connected with Switching Power Supply.In the present embodiment Switching Power Supply (not shown) is arranged on the Switching Power Supply box (not shown).The unit controls circuit is connected with Switching Power Supply (not shown), is arranged on the Switching Power Supply box (not shown).If system front end adopts integrative-structure, unit controls Circuits and Systems front end connects and converts the carrier signal of system front end to Transistor-Transistor Logic level.If system front end adopts primary controller and two individual components of divider, then described unit controls circuit is connected with divider and converts the carrier signal of divider to Transistor-Transistor Logic level.
Described LED display is connected communication and receives single-phase alternating current or the direct current that output port is exported simultaneously by power lead with the output port of divider.Adopt AC power or direct supply to be connected communication between LED display and the divider, get final product so power interface need be set on the LED display.
Described system front end flows to each unit LEDs display screen with power supply signal and carrier signal by system's rear end distribution, power supply between described each unit LEDs display screen is for being connected in parallel, described system front end distributes between the carrier signal that flows to each unit LEDs display screen for being connected in parallel, and described unit controls circuit is divided into two paths of signals with power supply signal that power lead transmits simultaneously and carrier signal to be transmitted.
See also Fig. 3 and shown in Figure 7, described unit controls circuit comprises power management module and signal processing module.Described unit controls circuit is divided into the two paths of signals transmission with single-phase alternating current that power lead transmits simultaneously and carrier signal, and one the tunnel is transferred to power management module, and another road is transferred to signal processing module.Power lead adopts AC power cord in the present embodiment.The power supply signal that described power management module transmits system front end converts direct current to and offers signal processing module.
Adopt power-switching circuit (AC-DC or DC-DC) in the power management module present embodiment, convert the single-phase alternating current that is received to direct current, produce the direct current of different voltages as required.
Signal processing module is handled the carrier signal that is received.Signal processing module comprises second transformer, second carrier module, back-end processor, second memory, bus driver.Back-end processor can adopt handling components able to programme such as field programmable gate array (FPGA), CPLD (CPLD) or process chip etc.Present embodiment adopts field programmable gate array (FPGA) to describe.Second transformer comprises transformer and linear coupled circuit, and is provided with holding circuit therein.
Second carrier module adopts carrier wave physical layer process chip and rectification/feedback unit (AFE).Second carrier module is connected with power management module.Power management module produces respectively for second carrier module and the required different direct supply of back-end processor in the present embodiment.
Second carrier module will convert Transistor-Transistor Logic level through the carrier signal after second transformer is handled to and be transferred to back-end processor and carry out processing controls.
Second memory comprises nonvolatile memory, register.Nonvolatile memory is connected with the back-end processor communication by memory bus, the canned data in the nonvolatile memory is transferred to back-end processor handles.Register is connected with the back-end processor communication by cache data bus, buffer address bus, buffer memory control bus.
Bus driver is connected communication with back-end processor, is connected with display driver circuit by data bus and control bus simultaneously, drives the screen body and shows output.Bus driver is connected with power management module simultaneously, and power management module is with the direct-current power supply bus driver that is produced.Bus driver adopts the 74HC245 chip in the present embodiment, also can adopt the chip of other models certainly.
The unit controls circuit is divided into two-way with carrier signal and the alternating current that power lead is transmitted simultaneously, and a routing power administration module converts single-phase alternating current to direct current, and produces the needs of the direct supply of different voltages for the different components and parts of LED display respectively.After second carrier module of another route signal processing module converts the carrier signal that divider transmitted to Transistor-Transistor Logic level, show output through back-end processor processing controls screen body.
Adopting ZAP to convert data-signal to carrier signal, to carry out the general bandwidth ratio of communication less, the general data signal is transmitted between a few M to tens M, can not satisfy the display requirement of LED display, the present invention will flow to the power supply of each unit LEDs display screen and vision signal by divider, and to adopt in parallel the distribution be that video signal transmission and power delivery between the screen body of unit LEDs display screen all is in parallel, thereby the data bandwidth of the screen signal of total system transmission is widened required data bandwidth, be promoted to 10G even tens G to hundreds of G.And video signal transmission between the screen body and power delivery all are in parallel, the screen body of arbitrary unit LEDs display screen goes wrong can not influence the use of other screen bodies, as long as change the fritter screen body that goes wrong, thereby the security performance of LED display and stability in use strengthened.
LED display adopts power lead to be connected with divider, in LED display power interface only need be set and carry out communication, do not need other interfaces to be set again in LED display, design simplifies the structure, reduced the connector between each equipment, reduce the connector and the signal wire that are connected between each unit screen body and the divider, promoted security and the stability of total system.Information distribution technology by divider is divided into multistage with the received screen signal that host computer transmitted and is written into AC power cord, realizes the synchronous playing of LED display.Solved the worry that building and public place repeat to connect up simultaneously, only needed to realize the transmission of video information and control signal by existing electric power network.
Carrier communication can be applicable to also can be applicable in the asynchronous display system in the synchronous display system in the above-mentioned LED display.Synchronous display system is presented at the video information that host computer transmitted on the LED display body synchronously.And the asynchronous display system of LED can be kept at video information in the main embedded system and by main embedded system decode, controls playing.
See also Fig. 1 and shown in Figure 8, the present invention can use carrier communication in the asynchronous display system in the LED display, comprise host computer, the system front end that is connected communication with host computer, be connected the system rear end of communication with system front end and be connected the LED display of communication with the system rear end, described system front end is connected by power lead with the system rear end, the data-signal that described host computer transmits converts carrier signal to by system front end, described system front end is transferred to the system rear end by power lead with power supply signal and carrier signal, and the signal after described system will handle the rear end is transferred to LED display and the driving LED display screen shows output.
Described system front end is connected with external power source.The system rear end can be provided with separately in addition, also can be arranged in the LED display.Employing is arranged on the system rear end in the LED display and describes in the present embodiment, and each unit LEDs display screen all is provided with a system rear end.
Described system front end comprises main embedded system and main carrier physical chip.Described system rear end is arranged in the LED display.Described LED display comprises display driver circuit, screen body, system rear end.Described system rear end comprise according to side signal transmission to be provided with from carrier wave physical chip, back embedded system, unit controls circuit.Described unit controls circuit is connected communication with display driver circuit.Described host computer is preserved data signal transmission and decoded, play by main embedded system control LED display to main embedded system.Adopt AC power cord or direct current supply line to carry out communication between described system front end and the LED display.Host computer can send required video information and control information to system front end by modes such as network signal line, video signal cable or wireless transmission.Host computer adopts TCP/IP or udp protocol to control a plurality of LED display demonstration outputs in the present embodiment.
The embodiment of the above is a better embodiment of the present invention, is not to limit concrete practical range of the present invention with this, and the equivalence that all shapes according to the present invention, structure are done changes all in protection scope of the present invention.
Claims (8)
1. LED display control system, it comprises: host computer, the system front end that is connected communication with host computer, be connected the system rear end of communication with system front end and be connected the LED display of communication with the system rear end, it is characterized in that: described system front end is connected by power lead with the system rear end, the data-signal that described host computer transmits converts carrier signal to by system front end, described system front end is transferred to the system rear end by power lead with power supply signal and carrier signal, and the signal after described system will handle the rear end is transferred to LED display and the driving LED display screen shows output;
Described system front end comprises processor and the carrier module that is connected with processor, and the data signal transmission of described host computer gives processor processing after carrier module converts carrier signal to;
Described system front end comprises primary controller and the divider that is connected with primary controller, processor comprises and is arranged on the primary processor in the primary controller and is arranged on divisional processing device in the divider, primary controller further comprises the storer that is connected with the primary processor communication, be connected communication with primary processor and the data-signal of host computer is converted to the optic module of fiber-optic signal, described carrier module is arranged in the divider and with the divisional processing device and is connected communication, and the fiber-optic signal that described divider after handling by divisional processing device and carrier module transmits primary controller converts carrier signal output to.
2. a kind of LED display control system according to claim 1, it is characterized in that: described system front end further comprises the transformer that is connected with external power source, the wave filter that is connected with transformer, reaches output port, described system handles the power supply signal that external power source provided through transformer, wave filter, described system front end is exported carrier signal and alternating current or direct current simultaneously by output port and is transferred to the system rear end by power lead.
3. a kind of LED display control system according to claim 2, it is characterized in that: the output port that described system front end is connected with end communication after the system is provided with a plurality of, described system front end converts the three-phase alternating current that outside three-phase alternating-current supply provided to single-phase alternating current, and described system front end is distributed to carrier signal and single-phase alternating current each output port and exported to the system rear end by power lead simultaneously.
4. a kind of LED display control system according to claim 1, it is characterized in that: described LED display comprises screen body and the display driver circuit that is connected with the screen body, described system rear end is arranged in the LED display and with display driver circuit and is connected, described system rear end comprises the Switching Power Supply that is connected with display driver circuit and the unit controls circuit that is connected with Switching Power Supply, and described unit controls Circuits and Systems front end connection also converts the carrier signal of system front end to Transistor-Transistor Logic level.
5. a kind of LED display control system according to claim 4, it is characterized in that: described system front end flows to each unit LEDs display screen with power supply signal and carrier signal by system's rear end distribution, power supply between described each unit LEDs display screen is for being connected in parallel, described system front end distributes between the carrier signal that flows to each unit LEDs display screen for being connected in parallel, and described unit controls circuit is divided into two paths of signals with power supply signal that power lead transmits simultaneously and carrier signal to be transmitted.
6. a kind of LED display control system according to claim 4, it is characterized in that: described unit controls circuit comprises power management module and the signal processing module that is connected with power management module, the power supply signal that described power management module transmits system front end converts direct current to and offers signal processing module, described signal processing module comprises back-end processor, the physical-layer carrier chip that is connected communication with back-end processor reaches and second transformer, the carrier signal of described system front end transmission is through second transformer, convert Transistor-Transistor Logic level to and be transferred to back-end processor after the physical-layer carrier chip is handled and handle, the carrier signal after back-end processor will be handled is transferred to display driver circuit and drives the demonstration of screen body.
7. a kind of LED display control system according to claim 1 is characterized in that: described system rear end is connected communication with divider by power lead, and described divider is exported to the system rear end with carrier signal and power supply signal by power lead simultaneously.
8. a kind of LED display control system according to claim 1, it is characterized in that: described system front end comprises main embedded system and main carrier physical chip, described system rear end is arranged in the LED display, described LED display further comprises display driver circuit and screen body, described system rear end comprise according to side signal transmission to be provided with from the carrier wave physical chip, back embedded system, the unit controls circuit, described unit controls circuit is connected communication with display driver circuit, and described host computer is preserved data signal transmission and play by main embedded system control LED display to main embedded system.
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| CN2009101074270A CN101609645B (en) | 2009-05-19 | 2009-05-19 | LED display screen control system |
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| CN102419701A (en) * | 2011-09-29 | 2012-04-18 | 钟再柏 | Light-emitting diode (LED) screen control system |
| CN103606349B (en) * | 2013-11-11 | 2016-08-24 | 广东威创视讯科技股份有限公司 | Splicing display device control system |
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| CN101609645A (en) | 2009-12-23 |
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