A kind of LED control circuit and method

Abstract

The present invention provides an LED control circuit and method, at least comprising: a power supply module, a control module and an LED module connected in series to form a loop; ~ the third control module; the LED module includes the first LED module that emits light in the high frequency band of the power supply, the second LED module that emits light in the positive half cycle of the low frequency power supply, or the third LED module that emits light in the negative half cycle of the low frequency power supply; each control module A switch is arranged inside, through which each control module is respectively turned on or off so as to control each LED module to light up or go out. Keep only the high frequency signal to light up the first LED module alone; keep only the low frequency positive half cycle signal to light up the second LED module alone; keep only the low frequency negative half cycle signal to light up the third LED module alone. The invention achieves the characteristics of realizing parallel control in series state, saves wire material, and reduces energy loss of wire resistance.

Description

Technical field [0001] The present invention relates to the field of lighting, in particular to an LED control circuit and method. Background technique [0002] Light Emitting Diode (LED) is a semiconductor electronic component that can emit light. This electronic component can only emit low-luminance red light in the early days. With the continuous advancement of technology, it has now developed to emit visible light, infrared and The degree of ultraviolet light and luminosity have also been greatly improved. Due to the unidirectional characteristic of LEDs, when a reverse voltage is applied to both ends of the LED, the LED lamp is in a reverse dead zone and cannot emit light; when a forward voltage is applied to both ends of the LED, the LED is turned on and emits light. LED has the advantages of high efficiency, long life, not easy to break, high switching speed, high reliability and other traditional light sources. The initial use of LEDs was as indicator lights, display pa...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an LED control circuit and method for solving the waste of wires caused by the multi-channel parallel connection in the LED control circuit in the prior art, and the resistance on the wires Significant increase, resulting in energy loss and other issues

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