Interface multiplexing circuit and LED control device

Abstract

The invention provides an interface multiplexing circuit and an LED control device. The circuit comprises: a dimming signal conversion unit which receives a dimming signal or a half-duplex communication signal from a communication / dimming multiplexing interface; a half-duplex communication unit that shares the communication / dimming multiplexing interface with the dimming signal conversion unit toreceive a dimming signal or the half-duplex communication signal from the multiplexing interface; and a processing unit which is electrically connected with and receives output signals of the dimmingsignal conversion unit and the half-duplex communication unit so as to determine whether the interface multiplexing circuit is in a dimming mode or a communication mode. According to the technical scheme, the same interface not only has a general dimming function, but also has communication and digital dimming functions, cables of input interfaces are effectively reduced, the cost is greatly reduced, the use safety of a lighting system is improved, the application is simpler and more convenient, and the compatibility is better.

Description

technical field [0001] The invention relates to the technical field of LED control, in particular to an interface multiplexing circuit and an LED control device. Background technique [0002] Smart lighting is an emerging technology that realizes remote centralized control and management of street lights through the application of power line carrier communication technology and wireless GPRS / CDMA communication technology. Cable anti-theft, remote meter reading and other functions can greatly save power resources, improve the management level of public lighting, and save maintenance costs. [0003] With the strong development of smart lighting, the market demand for digital dimming products with communication functions is increasing. In order to meet the demand, the existing solutions are usually two-way dimming interface: one is a three-in-one dimming interface, One digital dimming interface with communication. [0004] However, the existing technical solution of the two-w...

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Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the present invention provides an interface multiplexing circuit and an LED control device, which are used to solve the existing technical solution of the two-way dimming interface, which increases the cables of the input interface, which not only increases the cost, but also greatly It increases the risk of connecting the wrong interface, and brings technical problems such as hidden safety hazards to the lighting system.

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