Low-harmonic dimming method of wall-controlled LED lamp

A technology of LED lamps and low harmonics, applied in the field of single live wire low harmonic dimming of wall-controlled LED lamps, can solve the problems of troublesome management, time requirements for switching actions, and high cost

Inactive Publication Date: 2015-08-12
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Low-harmonic dimming method of wall-controlled LED lamp
  • Low-harmonic dimming method of wall-controlled LED lamp
  • Low-harmonic dimming method of wall-controlled LED lamp

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[0055] Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, but the embodiments of the present invention are not limited thereto.

[0056] The device implementing the method of the present invention is such as figure 1 As shown, it is composed of a wall control switch unit and an LED light adjusting drive unit in series. The wall control switch unit has single live wire AC in and single live wire AC1 out. The live wire AC1 of the LED light adjustment drive unit enters, and the neutral wire N goes out.

[0057] The structure of the wall control switch unit is as follows figure 2 As shown, it is composed of a single live wire power supply module, a single-chip control module, a phase-shifting drive module, a zero-crossing detection module, and a brightness setting module. The single live wire power module has a single live wire off-state power-taking function, and also has an on-state power take function...

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Abstract

A low-harmonic dimming method of a wall-controlled LED lamp is realized by a device which is composed of a wall-controlled switch unit and an LED lamp adjustment driving unit. When brightness changes, the wall-controlled switch unit transmits a brightness control signal which is controlled by phase shift triggering and is composed of a guiding waveform and a data waveform to the LED lamp adjustment driving unit. In the data waveform, the brightness grade is represented by the number of continuous single-phase sinusoidal half-waves with specific phase shift angles. The LED lamp adjustment driving unit changes the brightness of the LED lamp according to the brightness data in the brightness control signal. When the LED lamp is lightened and no brightness control signal is transmitted, the voltage waveform on the single live wire is a continuous and complete single-phase sinusoidal wave. According to the LED lamp dimming method, no remote controller is required; single laying of a control line and re-laying of a power line are not required; and 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 low harmonic dimming method for 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...

Claims

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Application Information

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IPC IPC(8): H05B37/02H05B44/00
CPCH05B45/10
Inventor 凌云王兵郭艳杰曾红兵陈刚
Owner HUNAN UNIV OF TECH
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