A novel LED display screen system backup circuit and a control method thereof

Abstract

The invention discloses a dual-system novel LED display screen system backup circuit and a control method thereof, which are respectively arranged on a main adapter plate and an auxiliary adapter plate and comprise a working state detection circuit, a working state judgment circuit and a data output control circuit,by detecting the working states of the two system cards and judging whether the twocontrol cards work at the same time or not, under the normal condition, only one system card works normally, the other system card does not work, and when the system card is abnormal, the system cardis switched to the other card to work. The method is simple in logic and easy to understand, and a design engineer is simple in design. The circuit is simple and little cost is increased.

Description

Technical field [0001] The invention relates to the field of LED display technology, in particular to a new type of LED display screen system backup circuit and control method thereof. Background technique [0002] In recent years, LED display screens have become more and more widely used, especially indoor small-pitch LED display products, which have experienced explosive growth. They have a wide range of applications and put forward many new requirements for system applications. Many places must carry out system signal However, the traditional backup methods are all based on the cooperation of the system software. The backup is realized on the same adapter board. In some special occasions, it is basically difficult to realize the backup plan when the system card is not on the same adapter board. Can adopt external system loop backup mode. [0003] The principle part of the backup circuit of the existing LED display dual receiving card (ie dual system) mainly consists of the abov...

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Problems solved by technology

[0007] As far as the existing dual-system backup method is concerned, the connection part of the backup schematic diagram of the above-mentioned scheme 1 and scheme 2 is relatively common and relatively simple, but the schemes realized by these two schemes must be based on the dual-system card in one On the adapter board, if the two system cards are separated on independent adapter boards, it will be difficult to achieve dual-card backup

[0008] Therefore, it can be said that the existing solutions do not solve the problem when the adapter board is independently designed, that is, when the internal adapter board of the module cannot be made into a complete adapter board due to structure or some factors, and the main card and the auxiliary card are located in two On the independent adapter board, the backup problem of the internal system card of the module

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