A synchronization method for synchronizing LED power supply with a single wire

Abstract

The invention provides a synchronous method for synchronizing with a single wire for an LED power supply, which is characterized in that a single wire is used for synchronous communication between the synchronous communication ports of the LED power supply, and the reference level of the synchronization signal is the output negative terminal of the bridge rectifier. The signal terminal of the synchronization signal is the positive output terminal of the AC phase line or bridge rectifier; the main control LED power supply modulates the data to be synchronized and the signal terminal signal of the synchronization signal based on the reference level of the synchronization signal itself, and serves as the synchronization signal and Through the output of the synchronous communication port, the LED power supply to be synchronized can demodulate the synchronous signal by analyzing the synchronous signal of the synchronous signal port and its own reference level. Use a single wire to transmit dimming brightness and switch signals, transmit the same high-voltage signal as the power line, no isolation is required, and there is no phase limit for the power line used to transmit the signal, and any phase line of the three-phase power supply can be used to transmit signals, unlimited distance and number of power sources.

Description

technical field [0001] The invention relates to the field of LED lighting, in particular to a synchronization method for synchronizing an LED power supply with a single wire. Background technique [0002] At present, LED dimming products are more and more widely used. Due to the needs of lighting, multiple lamps of the same type will be installed in the same area. Some application places require that all lamps controlled by the same dimming switch must in the same state. The existing power supply can realize this function in a small area, but often there will be asynchronous phenomena, that is: some lights in the same area, some dark, which is unacceptable to customers. [0003] For this kind of problem, existing power supplies basically use low-voltage DC signal to communicate to solve this problem, and also use PWM signal to solve this problem. The common point of these solutions is that they are on the secondary side and need to be isolated Transmission, and generally r...

AI Technical Summary

Problems solved by technology

The existing power supply can realize this function in a small area, but often there will be asynchronous phenomena, that is: some lights in the same area, some dark, customers can not accept

[0003] For this kind of problem, existing power supplies basically use low-voltage DC signal to communicate to solve this problem, and also use PWM signal to solve this problem. The common point of these solutions is that they are on the secondary side and need to be isolated Transmission, and generally requires 2 wires, the number of connected products is limited, the length of the wire is also limited, and the defect of poor wiring

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