发明授权
- 专利标题: LED outage detection circuit
- 专利标题(中): LED停电检测电路
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申请号: US12596863申请日: 2008-04-23
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公开(公告)号: US08076953B2公开(公告)日: 2011-12-13
- 发明人: Jeroen Snelten
- 申请人: Jeroen Snelten
- 申请人地址: NL Eindhoven
- 专利权人: Koninklijke Philips Electronics N.V.
- 当前专利权人: Koninklijke Philips Electronics N.V.
- 当前专利权人地址: NL Eindhoven
- 代理商 Mark L. Beloborodov
- 优先权: EP07107165 20070427
- 国际申请: PCT/IB2008/051553 WO 20080423
- 国际公布: WO2008/132661 WO 20081106
- 主分类号: G01R31/26
- IPC分类号: G01R31/26
摘要:
Disclosed is an outage detection circuit for detecting a defective light source, such as a LED coupled to a DC-DC converter circuit for receiving a power signal. The outage detection circuit includes a top voltage detector coupled to the LED for detecting a voltage across the LED. The top voltage detector has a top voltage terminal for supplying a top voltage signal. The detection circuit further includes a differential amplifier coupled to the top voltage terminal for receiving the top voltage signal as a first input signal and coupled to a reference voltage terminal. The reference voltage terminal is configured to supply a reference voltage as a second input signal. The differential amplifier includes an output terminal for supplying an outage detection signal.
公开/授权文献
- US20100117656A1 LED OUTAGE DETECTION CIRCUIT 公开/授权日:2010-05-13
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