A method for controlling the brightness of LED lights with a single live wire

Abstract

The invention provides a method for controlling the brightness of an LED lamp through a single live wire, wherein dimming is realized by an LED lamp single-live-wire dimming circuit which is composed of a brightness wall-controlling unit and a brightness adjustment driving unit. When brightness adjustment is required, the brightness wall-controlling unit controls and changes the phase shift angle of a voltage waveform which is output from the single live wire for transmitting a brightness control signal, and the brightness adjustment driving unit changes the brightness of the LED lamp according to the brightness grade in the brightness control signal. When the brightness wall-controlling unit transmits the brightness control signal, the output end of the single live wire outputs a guiding wave which is composed of a plurality of same phase shift angle half-waves, and a data wave which is composed of a plurality of continuous single-phase sinusoidal half-waves with different phase shift angles. Hex number system data which correspond with the data wave represents a brightness grade. The LED lamp dimming method can be used for replacement and upgrade of a common illuminating lamp which is controlled by the single live wire.

Description

technical field [0001] The invention relates to a lighting lamp technology, in particular to a method for controlling the brightness of an LED lamp with a single live wire. 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 cause...

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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