Table of Contents
Quick Takeaway
Have you encountered the following situations?
The LED display suddenly turned black,
Certain cabinets behave abnormally,
A series of Cabinet turned to black,
…..
The purpose of backup is to reduce the possibility of onsite problems during the usage of the LED display, rather than eradicate the problems. The main theory of the backup system is, that when the problem happens, the backup system can switch in to take over the workload, which makes the problem unnoticeable.
For the LED display, it mainly has two workflows, First is the power supplier line, and the Second is the signal flow line.
LED Display Power Supply Backup System
For the Power Supply Backup system, it mainly has two concerns, First is the main power source, second is the Power Supply unit used in LED Display. To make the backup system, we can make each led display cabinet with two PSU inside, while each of the PSU is connected with different main power source. Hence if the main power source fails, the backup power source would be working. And if one of the PSU failed, the other PSU would be working. The catch of this is that the LED display need to support Dual PSU backup.
LED Display Signal Backup System
The led display signal connection layout is as below, the signal flow like this, computer->video processor->led display cabinets.
Hence the LED display’s signal flow problem might happen in
1: Computer failure
2: Video processor failure or the signal cable from the computer to video processor failure
3: Receiving card failure
4: Signal cable between LED cabinets failure or signal cable between LED cabinet and video processor failure
With those four conditions, we can use different backup methods.
LED display Net port backup setting
The Net port backup is try to solve the “4” signal flow problems, as the video processor transmits signal to the led display through net cable, hence if the net cable is broken, the signal will not be able to pass down to the next cabinet, which means the rest cabinet would be “ black”.
With the net port backup, the last cabinet would also connect with the video processor, hence the video processor and the led cabinets formed a signal loop. When one net cable is broken, this loop can still transmit the signal to all the cabinets.
Net port backup setting as below:
LED Display Video Processor Backup
As the video processor is a highly used device in LED Display, it might have chance to go down. Using a backup video processor not only can solve the the video processor failure problem, it can also solve the net cable failure problem. As the connection layout of the video processor is simialr as the net port backup layout, the difference is the signal circle loop of the video processor is formed with two video processor
The connection layout is as below:
LED Display Receiving card Backup
If one of the receiving card in LED Display become failure, the above backup method can not solve the problem. The receiving card backup system need to be supported by hardware, that the led display need to have dual receiving card design on the HUB board.
The Receiving card backup system need two video processors, and each processor control one way of the receiving card. The connection layout is as below:
It solves the receiving card, signal cable, video processor’s failure problem.
Computer backup
Now the LED Display part all has backup for incident problems. The risk now lies in the computer part, we can also make a backup computer to feed to video source to the video processor. Hence if one computer is failure, the other one can still work.
Dual system + Dual signal loop backup
The above backup solution can already meet most of the requirements, but in some high level case, they still have a high stability requirements. Hence it can use Dual system+Dual signal loop back up. It is a combination of the dual receiving card backup and dual video processor backup. In this solution, it would have four video processor, while two video processor is responsible for the main receiving card connection,
the other two are responsible for the backup receiving card connection.
The connection layout is as below.
At Tepixel, we not only produce high quality led displays, but also offer appropriate suggestions based on the requirements of your project. What’s more, we would also side by side help you with your project. If you have any questions, welcome to contact us
