Invention Grant
- Patent Title: End of lamp life protection circuit with bi-level detections for the electronic ballast and method thereof
- Patent Title (中): 电子镇流器双层检测的灯寿命保护电路结束及其方法
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Application No.: US12980449Application Date: 2010-12-29
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Publication No.: US08378592B2Publication Date: 2013-02-19
- Inventor: Ching-Ho Chou , Yung-Chuan Lu , Edy Chandra , Chao-Wei Tsai
- Applicant: Ching-Ho Chou , Yung-Chuan Lu , Edy Chandra , Chao-Wei Tsai
- Applicant Address: TW Taoyuan Hsien
- Assignee: Delta Electronics, Inc.
- Current Assignee: Delta Electronics, Inc.
- Current Assignee Address: TW Taoyuan Hsien
- Agency: Gottlieb, Rackman & Reisman, P.C.
- Priority: TW98146628A 20091231
- Main IPC: H05B37/02
- IPC: H05B37/02
Abstract:
The configurations of an end of lamp life protection circuit for a ballast and a method thereof are provided in the present invention. The proposed circuit includes a voltage-dividing circuit receiving an input voltage and outputting a first and a second divided voltages and a switch apparatus raising the first divided voltage when the second divided voltage is less than a first pre-determined threshold value and turning off the ballast when the first divided voltage is higher than a second pre-determined threshold value.
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