Invention Grant
- Patent Title: Safety circuit for electro-luminescent lamp ballast
- Patent Title (中): 电发光镇流器安全电路
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Application No.: US12313669Application Date: 2008-11-20
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Publication No.: US08018174B2Publication Date: 2011-09-13
- Inventor: Chih-Ping Liang , Chang-Yi Liu
- Applicant: Chih-Ping Liang , Chang-Yi Liu
- Applicant Address: US PA Blue Bell
- Assignee: Ceelite LLC
- Current Assignee: Ceelite LLC
- Current Assignee Address: US PA Blue Bell
- Agency: Connolly Bove Lodge & Hutz LLP
- Main IPC: H05B37/00
- IPC: H05B37/00

Abstract:
A safety circuit is provided for a ballast of an electro-luminescent (EL) lamp. The EL lamp had an electrical ground shield on at least a portion thereof and has a separate ground lead. The ballast is an isolated ballast with a line input being isolated from an output. The ballast is constructed and arranged to be electrically connected with the separate ground lead. The circuit includes a current sensing structure constructed and arranged to connect between the separate ground lead and a potential ground of the ballast. In the event a user contacts the EL lamp to replace the EL lamp or contacts a defective EL lamp, the ballast is shut down based on a value of current sensed by the current sensing structure.
Public/Granted literature
- US20090146574A1 Safety circuit for electro-luminescent lamp ballast Public/Granted day:2009-06-11
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