A single live wire dimming circuit for wall-controlled LED lights

Abstract

A single-live-wire dimming circuit for a wall-controlled LED lamp is composed of a wall-controlled switch unit and an LED lamp adjustment driving unit; wherein the wall-controlled switch unit comprises a single-live-wire power module, a single-chip microcomputer control module, a phase shift driving module, a zero-passing detecting module and a brightness setting module. The LED lamp adjustment driving unit comprises a single-chip microcomputer adjusting module and an LED driving module. When brightness changes, the wall-controlled switch unit transmits a brightness control signal through controlling a voltage waveform which is output from the single-live-wire output end. The LED lamp adjustment driving unit receives the brightness control signal through the single-chip microcomputer adjusting module and controls the brightness of the LED lamp. According to the LED lamp dimming method, a remote controller is not required, and single laying of a control line is not required. Furthermore re-laying of a power line is not required. Replacement and upgrade of a common illuminating lamp can be realized.

Description

technical field [0001] The invention relates to a lighting lamp technology, in particular to a single live wire dimming circuit of a wall-controlled LED lamp. Background technique [0002] Due to the nonlinear characteristics of LED lamps, the brightness of LED lamps cannot be realized by adjusting the voltage. [0003] When using a controllable constant current source to adjust the brightness of the LED lamp, the change of the working current will cause the color shift of the LED lamp. At the same time, the load current of the LED lamp becomes very low under low brightness, which will make the controllable constant current source The lower the efficiency and the higher the temperature rise, the greater the power consumption on the driver chip will be, which will damage the life of the constant current source and the LED light source. [0004] Using PWM (pulse width modulation) dimming method to control the brightness of LED lights can avoid the problems caused by voltage r...

AI Technical Summary

Problems solved by technology

The LED light control circuit is equipped with a remote control receiving device, and the LED light can be dimmed step by step or steplessly dimmable through the remote control. The disadvantage is that one LED light needs to be equipped with a remote control, resulting in a large number of remote controls and troublesome management. , the cost is also high

However, this method can only provide 4 levels of adjustable brightness of LED lights, and the switch action has a time requirement

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