US Patent No. 10,342,087

SYSTEMS AND METHODS FOR INTELLIGENT DIMMING CONTROL USING TRIAC DIMMERS


Patent No. 10,342,087
Issue Date July 02, 2019
Title Systems And Methods For Intelligent Dimming Control Using Triac Dimmers
Inventorship Liqiang Zhu, Shanghai (CN)
Jiqing Yang, Shanghai (CN)
Zhuoyan Li, Shanghai (CN)
Lieyi Fang, Shanghai (CN)
Assignee On-Bright Electronics (Shanghai) Co., Ltd., Shanghai (CN)

Claim of US Patent No. 10,342,087

1. An apparatus for a power converter, the apparatus comprising:a drive signal generator configured to receive an input signal associated with a TRIAC dimmer and output a drive signal to a switch to affect a current that flows through a winding of a power converter;
wherein:
the input signal includes a first pulse corresponding to a first input period, the first pulse being associated with a first pulse width; and
the first pulse width is larger than a first threshold under one or more conditions;
wherein the drive signal generator is further configured to:
in response to the first pulse width being smaller than a second threshold, even if the first pulse width is still larger than the first threshold, maintain the drive signal at a first logic level without modulation to keep the switch open during at least the first input period.