发明授权
US08076953B2 LED outage detection circuit 有权
LED停电检测电路

  • 专利标题: LED outage detection circuit
  • 专利标题(中): LED停电检测电路
  • 申请号: US12596863
    申请日: 2008-04-23
  • 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
LED outage detection circuit
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.
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