LED light modulation apparatus suitable for controlled silicon dimmer

Abstract

The invention relates to an LED dimming device which is applicable to a controllable silicon dimmer. The LED dimming device comprises a rectifier, a fictitious load circuit, a zero-crossing detection circuit, a high frequency transformer, a main power supply drive integrated circuit, a secondary rectification and filter circuit, a secondary power supply drive integrated circuit and an average voltage detection circuit. The invention has the beneficial effect that the LED dimming device is capable of realizing the brightness adjustment of an LED lamp by the controllable silicon dimmer and has the advantages of good dimming effect, long service life, simple structure and environmental protection and energy saving.

Description

technical field [0001] The invention relates to a dimming device, in particular to an LED dimming device suitable for a thyristor dimmer. Background technique [0002] In the prior art, the thyristor dimmer can adjust the brightness of the traditional tungsten bulb, see figure 1 , the conduction time of the thyristor dimmer 5 is determined by the charging time of the capacitor 9 of the circuit, thereby changing the conduction angle of the sine wave of the alternating current, changing the current of the tungsten bulb 10, and achieving the brightness adjustment effect , also known as cutting edge technology. like figure 1 As shown, the thyristor dimmer 5 is connected in series with the tungsten bulb 10. When the power is connected to the first moment, the current passes through the fuse 1, the inductor 2, the adjustable potentiometer 7, the resistor 8, the capacitor 9, and the tungsten bulb 10. , forming a charging circuit for charging capacitor 9, the charging time of ...

AI Technical Summary

Problems solved by technology

Therefore, in the prior art, the thyristor dimmer cannot adjust the brightness of the LED bulb with built-in or external switching power supply.

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