LED lamp with light and color capable of being adjusted

Abstract

An LED lamp with light and the color capable of being adjusted comprises a rectifying and filtering circuit, a constant-current control circuit, an LED light source and a PWM output module, wherein the rectifying and filtering circuit is used for rectifying and filtering an input alternating current to form a direct current; the constant-current control circuit is connected with the output end of the rectifying and filtering circuit and used for providing a constant current for LED lamp strings; the LED light source comprises at least two LED lamp strings, the colors of all the LED lamp strings are different and the LED lamp strings are connected in series, and each LED lamp string is connected with a switch circuit in parallel; the PWM output module is provided with a first signal output end and a plurality of second signal output ends, the first signal output end is connected with the constant-current control circuit so as to adjust the luminance of the LED light source, and each second signal output end is connected with one switch circuit so as to adjust the current flowing through the corresponding LED lamp string. According to the LED lamp, light adjustment and color adjustment of the LED lamp can be separated, the LED lamp is simple in circuit and easy to control, and the light and the color can be adjusted to be more fine and smooth.

Description

technical field [0001] The invention relates to an LED lamp, in particular to an LED lamp with adjustable light and color adjustment. Background technique [0002] At present, as a green energy-saving light source, LED light sources are favored by the majority of lighting manufacturers. Lighting lamps using LED light sources are becoming more and more popular, gradually replacing common lighting lamps such as fluorescent lamps. With the improvement of people's living standards, aesthetics and quality of life have been improved, people are gradually dissatisfied with the lighting of ordinary lamps, so colored LED lights appear. [0003] Since the brightness of the LED light source is almost directly proportional to its driving current, the method of adjusting the forward current of the LED lamp is usually used to adjust the brightness, which is simple and practical. Traditional LED lamp dimming technology uses DC-DC conversion circuit, which has complex circuits, low efficie...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the dimming and color matching of existing LED lamps cannot be separated, the circuit is complex and the efficiency is low, the present invention provides an LED lamp capable of dimming and color adjustment, which has simple circuit, low price and high efficiency, and the dimming and adjusting color can be separated

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