LED touch stepless light-modulation color temperature adjusting driving power supply and control method thereof

Abstract

The invention provides an LED touch stepless light-modulation color temperature adjusting driving power supply and a control method thereof. The power supply comprises a rectification circuit, a constant-current driving circuit, an LED diode string lamp, a touch light modulation circuit and a voltage stabilizing circuit. The input end of the voltage stabilizing circuit is connected with the constant-current driving circuit and the output end is connected with the touch light modulation circuit. The rectification circuit rectifies municipal power into direct current voltage and supplies the direct current voltage to the constant-current driving circuit. The constant-current driving circuit begins to work and then provides voltage to the voltage stabilizing circuit. The voltage stabilizing circuit stabilizes the working voltage into 5V direct current voltage and provides the 5V direct current voltage for the touch light modulation circuit so as to allow the touch light modulation circuitto be in a standby state. A human body sensing touch signal is input into the touch light modulation circuit and adjustment of the brightness and of the color temperature of the LED diode string lampis controlled through the touch light modulation circuit. According to the invention, the stability of the working voltage of the touch light modulation circuit is improved; the stability and the sensitivity of the adjustment of the brightness and of the color temperature are improved; occurrence probability of phenomena of adjustment lagging, malfunction and error-triggering is reduced; and reliability of the adjustment of the brightness and of the color temperature of the LED diode string lamp is improved.

Description

Technical field [0001] The invention relates to an LED touch stepless dimming and color temperature driving power supply and a control method thereof, and belongs to the technical field of LED circuits. Background technique [0002] LED is a semiconductor device that can directly convert electrical energy into light energy. It is different from the principle of tungsten filament luminescence for incandescent lamps and tri-color powder luminescence for energy-saving lamps, but uses electroluminescence. In modern society, because of the advantages of LEDs such as small size, long life, high luminous efficiency, no radiation and low power consumption, people use LEDs as the light source of LED lamps more and more widely. [0003] Light sources with different color temperatures can give users different feelings. The preference of color temperature is also determined by each person. The lamp needs to have the function of color temperature adjustment. Moreover, users are accustomed to u...

AI Technical Summary

Problems solved by technology

[0012] The existing dimmable and color-adjustable LED lighting power supply has the following defects: 1. Occasionally, it is not sensitive enough when dimming, and it is easy to trigger by mistake

2. Dimming or color temperature is prone to malfunction and freeze

3. The stability of the circuit is poor, and the stability and uniformity of brightness adjustment are poor

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