Invention Grant
US08193738B2 Dimmable LED device with low ripple current and driving circuit thereof
失效
具有低纹波电流的可调光LED器件及其驱动电路
- Patent Title: Dimmable LED device with low ripple current and driving circuit thereof
- Patent Title (中): 具有低纹波电流的可调光LED器件及其驱动电路
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Application No.: US12537801Application Date: 2009-08-07
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Publication No.: US08193738B2Publication Date: 2012-06-05
- Inventor: Chung-Jen Chu , Yi-Jing Chen , Hung-Chun Chung
- Applicant: Chung-Jen Chu , Yi-Jing Chen , Hung-Chun Chung
- Applicant Address: TW Taoyuan County
- Assignee: Phihong Technology Co., Ltd.
- Current Assignee: Phihong Technology Co., Ltd.
- Current Assignee Address: TW Taoyuan County
- Agency: Muncy, Geissler, Olds & Lowe, PLLC
- Main IPC: H05B37/02
- IPC: H05B37/02 ; H05B33/08 ; H03K17/16
Abstract:
A dimmable light emitting diode (LED) device with low ripple current includes a LED module, a phase dimmer, a voltage converting module, a driving module and a feedback module. The flyback converter of the voltage converting module adds a secondary forward winding connecting to a phase cut-off detector to provide a detecting voltage in proportion to current level of the output current across the LED module.
Public/Granted literature
- US20110031899A1 DIMMABLE LED DEVICE WITH LOW RIPPLE CURRENT AND DRIVING CIRCUIT THEREOF Public/Granted day:2011-02-10
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