CN104992666A - LED display screen anti-fault system - Google Patents
LED display screen anti-fault system Download PDFInfo
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- CN104992666A CN104992666A CN201510368721.2A CN201510368721A CN104992666A CN 104992666 A CN104992666 A CN 104992666A CN 201510368721 A CN201510368721 A CN 201510368721A CN 104992666 A CN104992666 A CN 104992666A
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Abstract
The invention discloses an LED display screen anti-fault system, including a signal source, a sending card, a plurality of receiving cards, and display units connected with the receiving cards. The signal source sends a video signal to the sending card. The sending card processes the video signal and sends the processed video signal to the plurality of receiving cards at the same time. The plurality of receiving cards control display of the display units according to the received video signal. The LED display screen anti-fault system also comprises a storage device and a signal controller. Bidirectional data transmission can be performed between the storage device and the signal source. The signal controller is arranged between the storage device and the sending card. Unidirectional data transmission can be performed between the storage device and the receiving cards. No standby system is required and only one storage device and the signal controller are needed for achieving backup of system programs and video information. When a control system has a fault, a backup program starts to run by switching, so that a display screen is enabled to continuously work within a certain period, resources are effectively saved, and the overall cost is reduced.
Description
Technical field
The invention belongs to electronics applications field, be specifically related to a kind of LED display fail-safe system.
Background technology
LED display asynchronous control system is also known as LED display off line control system or off line card.Be mainly used to show various word, symbol and figure or animation is main.Picture display information is by Computerized Editing, and insert the frame memory of LED display through RS232/485 serial port in advance, then display the play by screen, move in circles, display mode is rich and varied, changes various.Its principal feature is: simple to operate, cheap, usable range is wider.The simple and easy asynchronous control system of LED display is only with display word clock, word, special character.LED display picture and text asynchronous control system is except the function with Simple Control System, and maximum feature can control display screen content in subregion.Support simulated clock simulation clock display, countdown, picture, form and animation display.There is the functions such as timed power on/off, temperature control, humid control.
Application number is 201320829955.9, the applying date be on Dec 13rd, 2013 Shenzhen Jiuzhou Photoelectricity Technology Co., Ltd. disclose a kind of LED display fail-safe control circuit, it comprises data distributor, first via receiving card, second road receiving card, signal deteching circuit and data selection circuit, data distributor receives the control signal from outside source, its two output terminal exports first via receiving card and the second road receiving card respectively to, the output terminal of first via receiving card and the second road receiving card is all connected to signal deteching circuit, signal deteching circuit detects multiple control signal of first via receiving card and testing result is sent to data selection circuit, data selection circuit is selected first via receiving card is switched to LED display unit or the second road receiving card is switched to LED display unit with alternative first via receiving card according to the testing result from signal deteching circuit.LED display screen fail-safe control circuit disclosed in this utility model is owing to arranging simple two-way signal, by combinational logic circuit, Real-Time Monitoring, judgement are carried out, when it breaks down to use Zhong mono-road input signal, automatically switch to another road, normally run to make LED display screen.
Above-mentioned patent adopts two-way receiving card, be equivalent to outfit two cover system, like this, it is all idle that standby system is equivalent to the most of the time, only just starts when breaking down, of long duration need not, standby system also there will be fault, waste resource, add cost, also effectively do not play trouble-proof effect.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of LED display fail-safe system, solves standby system waste resource in prior art, increases the problem of cost.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of LED display fail-safe system, comprise signal source, sending card, several receiving cards, and the display unit to be connected with each receiving card, vision signal is sent to sending card by described signal source, after sending card processes vision signal, synchronized transmission is to several receiving card, receiving card controls display unit display according to the vision signal received, also comprise a storer and a signal controller, wherein, bidirectional data transfers can be carried out between storer and signal source, signalization controller between storer and sending card, one-way data transfer can be carried out between storer and receiving card, described storer is store video source signals respectively, and sending card Backup Data and the video display signal after sending card process, receiving card is transferred to by the video display signal after process in signal controller control store.
Several receiving cards described are sequentially connected in series.
The central processing unit of described sending card and receiving card is fpga chip.
Described fpga chip is the one in the Spartan-6 family chip of Xilinx company.
Described fpga chip is XC6SLX16.
Described display unit comprises several casings, each casing comprises multiple module, by connecting and/or being connected in parallel between module, described module comprises LED and driving chip, each driving chip drives one group of LED, three groups of LED are respectively one group of red LED lamp, one group of green LED lamp, one group of blue led lamp, and each signal output pin of driving chip is respectively connected with a LED group of connecting.
Described driving chip is MBI5024 or MBI5167 that scientific & technical corporation is built up in Taiwan.
Compared with prior art, the present invention has following beneficial effect:
1, standby system is not needed, only need increase storer and signal controller, the backup of system program and video information can be realized, when control system breaks down, be switched to stand-by program work, can ensure that display screen works within a period of time, effectively save resource, reduced holistic cost.
2, the central processing unit of controller adopts fpga chip, has powerful, the feature that program is stable, the demand application that applicable data real-time is high.
3, MBI5024 chip is that a performance that accumulation science and technology in Taiwan controls to release for LED display is specially high, the chip that cost is low, and the LED display control for the type can realize its display demand, reduces the cost of whole screen simultaneously.
Accompanying drawing explanation
Fig. 1 is system chart of the present invention.
Embodiment
Below in conjunction with accompanying drawing, structure of the present invention and the course of work are described further.
As shown in Figure 1, a kind of LED display fail-safe system, comprise signal source, sending card, several receiving cards, and the display unit to be connected with each receiving card, vision signal is sent to sending card by described signal source, after sending card processes vision signal, synchronized transmission is to several receiving card, receiving card controls display unit display according to the vision signal received, also comprise a storer and a signal controller, wherein, bidirectional data transfers can be carried out between storer and signal source, signalization controller between storer and sending card, one-way data transfer can be carried out between storer and receiving card, described storer is store video source signals respectively, and sending card Backup Data and the video display signal after sending card process, receiving card is transferred to by the video display signal after process in signal controller control store.
Several receiving cards described are sequentially connected in series.
The central processing unit of described sending card and receiving card is fpga chip.
Described fpga chip is the one in the Spartan-6 family chip of Xilinx company.
Described fpga chip is XC6SLX16.
Spartan-6 series not only has leading system integration ability, can also realize the minimum total cost being applicable to high volume applications simultaneously.This series is by 13 member compositions, and available density is not from 3840 logical blocks to 147443 logical blocks etc.Compared with previous generation Spartan series, this serial power consumption be only its 50%, and speed is faster, linkage function is more comprehensively abundant.Spartan-6 series adopts the manufacture of ripe 45nm low-power consumption copper wiring technology, the perfection achieving cost performance and power consumption balances, brand-new and more efficient pair register 6 can be provided to input look-up table (LUT) logic and a series of abundant built-in system level module, comprising 18Kb (2 x 9Kb) Block RAM, second generation DSP48A1 Slice, SDRAM Memory Controller, enhancement mode mixed mode Clock management module, SelectIO technology, the high speed serialization transceiver module of power optimization, the compatible endpoint module of PCI Express, AS level power supply management mode, automatic detection config option, and by AES and Device DNA defencive function realize enhanced ip security.These excellent specific properties provide the replacement scheme able to programme of low cost for customizing ASIC product with unprecedented ease for use.Spartan-6 FPGA can be logical design in enormous quantities, is that the DSP design of guiding and cost-sensitive Embedded Application provide best solution with consumer.Spartan-6 FPGA has established solid programmable chip basis, is highly suitable for the target design platform that can provide integrated software and hardware assembly, energy can be focused on innovation work to make designer at the beginning of development starts.
The grading of 1.Spartan-6 fpga logic unit has fully demonstrated the more powerful logical block ability that up-to-date 6 input LUT frameworks possess.
2. each Spartan-6 FPGA Slice all comprises 4 LUT and 8 triggers.
3. each DSP48A1 Slice includes a 18x18 multiplier, a totalizer and a totalizer.
4.Block RAM size is 18Kb substantially.Each module can also as two independently 9Kb module uses.
5. each CMT includes two DCM and PLL.
6. under-3N speed step, do not support Memory Controller module.
Technician can select the concrete model being applicable to project according to the needs relating to input.
Described display unit comprises several casings, each casing comprises multiple module, by connecting and/or being connected in parallel between module, described module comprises LED and driving chip, each driving chip drives one group of LED, three groups of LED are respectively one group of red LED lamp, one group of green LED lamp, one group of blue led lamp, and each signal output pin of driving chip is respectively connected with a LED group of connecting.
Described driving chip is MBI5024 or MBI5167 that scientific & technical corporation is built up in Taiwan.
MBI5024 utilizes up-to-date PrecisionDrive technology, and aim at the drive IC of LED display panel design, the CMOS bit shift register that it is built-in and bolt-lock function, can convert the input data of serial to parallel output data formats.
The input voltage range value of MBI5024 is 3.3 volts to 5 volts, provides 16 current sources, 3-45 mA can be provided to determine the magnitude of current with driving LED in each output stage; And in single IC the current difference of output channel be less than ± 3%; Output current difference between many IC is less than ± and 6%; Electric current, along with output terminal withstand voltage (VDS) change, is controlled in every volt 0.1%; And electric current is subject to service voltage (VDD), the change of environment temperature is also controlled in 1%.User can via selecting the RSET of different resistance to adjust the size of current of each output stage of MBI5024, by this mechanism, and user can the luminosity of accurately control LED.
The design of MBI5024 ensures that its output stage can be withstand voltage 17 volts, therefore can be connected in series multiple LED at each output terminal.
In addition, MBI5024 also provides the high clock frequency of 25MHz to meet system to the demand in mass data transmission.
MBI5024 chip is that a performance that accumulation science and technology in Taiwan controls to release for LED display is specially high, the chip that cost is low, and the LED display control for the type can realize its display demand, reduces the cost of whole screen simultaneously.
This chip main lift display screen uniformity coefficient of MBI5024, and tolerate that larger LED luminance difference is to reduce manufacturing cost, simultaneously because current accuracy improves, larger LED luminance error can be tolerated, contribute to manufacturer and reduce LED purchase cost.
Claims (7)
1. a LED display fail-safe system, comprise signal source, sending card, several receiving cards, and the display unit to be connected with each receiving card, vision signal is sent to sending card by described signal source, after sending card processes vision signal, synchronized transmission is to several receiving card, receiving card controls display unit display according to the vision signal received, it is characterized in that: also comprise a storer and a signal controller, wherein, bidirectional data transfers can be carried out between storer and signal source, signalization controller between storer and sending card, one-way data transfer can be carried out between storer and receiving card, described storer is store video source signals respectively, and sending card Backup Data and the video display signal after sending card process, receiving card is transferred to by the video display signal after process in signal controller control store.
2. LED display fail-safe system according to claim 1, is characterized in that: several receiving cards described are sequentially connected in series.
3. LED display fail-safe system according to claim 1, is characterized in that: the central processing unit of described sending card and receiving card is fpga chip.
4. LED display fail-safe system according to claim 3, is characterized in that: described fpga chip is the one in the Spartan-6 family chip of Xilinx company.
5. LED display fail-safe system according to claim 4, is characterized in that: described fpga chip is XC6SLX16.
6. LED display fail-safe system according to claim 1, it is characterized in that: described display unit comprises several casings, each casing comprises multiple module, by connecting and/or being connected in parallel between module, described module comprises LED and driving chip, each driving chip drives one group of LED, and three groups of LED are respectively one group of red LED lamp, one group of green LED lamp, one group of blue led lamp, and each signal output pin of driving chip is respectively connected with a LED group of connecting.
7. LED display fail-safe system according to claim 6, is characterized in that: described driving chip is MBI5024 or MBI5167 that scientific & technical corporation is built up in Taiwan.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105321468A (en) * | 2015-11-13 | 2016-02-10 | 苏州扬佛自动化设备有限公司 | Light-controlled LED display screen control system |
| CN107117033A (en) * | 2017-04-28 | 2017-09-01 | 北京新能源汽车股份有限公司 | A kind of information display control method, device, instrument controller and electric automobile |
| CN107564427A (en) * | 2017-10-18 | 2018-01-09 | 深圳明信技术有限公司 | A kind of LED module, LED display and display system |
| CN111833799A (en) * | 2019-04-15 | 2020-10-27 | 杭州海康威视数字技术股份有限公司 | LED receiving assembly and receiving card switching method |
| CN112885296A (en) * | 2021-03-10 | 2021-06-01 | 浙江大华技术股份有限公司 | Method and device for acquiring fault information, storage medium and electronic device |
| CN113411658A (en) * | 2021-06-17 | 2021-09-17 | 杭州海康威视数字技术股份有限公司 | Display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105321468A (en) * | 2015-11-13 | 2016-02-10 | 苏州扬佛自动化设备有限公司 | Light-controlled LED display screen control system |
| CN107117033A (en) * | 2017-04-28 | 2017-09-01 | 北京新能源汽车股份有限公司 | A kind of information display control method, device, instrument controller and electric automobile |
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| CN111833799A (en) * | 2019-04-15 | 2020-10-27 | 杭州海康威视数字技术股份有限公司 | LED receiving assembly and receiving card switching method |
| CN112885296A (en) * | 2021-03-10 | 2021-06-01 | 浙江大华技术股份有限公司 | Method and device for acquiring fault information, storage medium and electronic device |
| CN113411658A (en) * | 2021-06-17 | 2021-09-17 | 杭州海康威视数字技术股份有限公司 | Display device |
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