Dimming control method and circuit thereof

Dimming control method and circuit thereof

2018/1/2 Kung; Che-Min, Wu; Tse-Hsu, Hwang; Jung-Min, Yang; Shun-Yi 

Abstract A dimming control method and circuit thereof are provided. After receiving a TRIAC signal with at least one positive/negative half cycle waveforms, the turning points of the positive/negative half cycles are detected to obtain the conduction angles of the positive/negative half cycle waveforms. Then, a pulse width modulated signal with the symmetrical positive and negative half cycle waveforms is rebuilt to control a lamp. Therefore, the disclosure can solve the flickering issue of the lamp.

• Link:

http://patft.uspto.gov/netahtml/PTO/search-bool.html

• PATENT/NUMBER

     Utility/9,860,950

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patent pdf: https://drive.google.com/file/d/1SQ7Thks330p5f-qqzJMJfTFE0wxZRf7I/view?usp=sharing