LED dimming circuit and LED module, and LED module dimming method

Abstract

The invention discloses a LED dimming circuit and a LED module, and a LED module dimming method. The LED dimming circuit includes a voltage input end, a first voltage output end, and a second voltage output end, wherein the voltage input end and the first voltage output end are connected to a voltage stabilizing circuit therebetween, the voltage input end and the second voltage output end are connected to a switch circuit therebetween, and the switch circuit is turned on and off on the basis of thevoltage value that is input by the voltage input end. The LED module also includes the LED dimming circuit and two groups of LED chip group. The method herein includes: providing voltage to the voltage input end, subject the voltage that is output by the voltage input end to the voltage stabilizing circuit and providing thestabilized voltage to a first LED chip group which emits light; if the voltage input by the voltage input end is higher than an on threshold value of the switch circuit, turning on the switch circuit and providing a voltage to a second LED chip group which emits light. According to the invention, the LED dimming circuit, the LED module, and the LED module dimming method can realize color regulation o the LED module.

Description

technical field [0001] The invention relates to the field of semiconductor light-emitting devices, in particular to an LED dimming circuit and an LED module with the dimming circuit, and also relates to a dimming method for the LED module. Background technique [0002] LED lighting devices use light-emitting diodes (LEDs) as light-emitting elements, which have the advantages of energy saving, environmental protection, low power consumption, and long service life, and are widely used in various lighting occasions. An existing LED lighting device adopts two sets of LED chipsets, one of which is a cold light LED chipset, which can emit cool-toned light after being powered on, and the other set of LED chipsets is a warm light chipset, which can Afterwards, it can emit warm-toned light. In this way, people can control the luminance of the two sets of LED chips by controlling the voltage applied to the two sets of LED chips, thereby changing the overall color temperature of the L...

AI Technical Summary

Problems solved by technology

[0005] However, in this solution, the warm white LED chipset and the cool white LED chipset are adjustable separately, so the circuit structure is complicated, especially a knob potentiometer needs to be set as a switch to control the on-off of the two groups of LED chipsets. , leading to a large volume of the LED module, and a large area of ​​the control circuit, resulting in a large area of ​​the PCB board, thereby increasing the production cost of the LED module

In addition, when adjusting the color temperature of the LED module, manual adjustment is required, which also brings inconvenience to the color temperature adjustment of the LED module

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