发明申请
- 专利标题: Single led driver for a traffic light
- 专利标题(中): 单个LED驱动器用于交通灯
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申请号: US10562511申请日: 2004-06-21
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公开(公告)号: US20060152175A1公开(公告)日: 2006-07-13
- 发明人: Bernd Clauberg
- 申请人: Bernd Clauberg
- 专利权人: Koninklijke Philips Electronics N.V.
- 当前专利权人: Koninklijke Philips Electronics N.V.
- 国际申请: PCT/IB04/02056 WO 20040621
- 主分类号: H05B39/00
- IPC分类号: H05B39/00
摘要:
One form of a traffic light (10, 11) employs one or more LED circuits connected to a voltage source (VS). Each LED circuit includes a series connection of a LED array (30), a current limiter (31) and an electronic switch (32). Each current limiter (31) controls a flow of LED current (IRL) through an associated LED array (30) whenever a switch controller (21) closes the associated electronic switch (32). Another form of a traffic light (60, 61) employs one or more LED circuits connected to a current source (IS). Each LED circuit includes a parallel connection of a LED array (80) and an electronic switch (81). A LED current (IRL) flows through an LED array (80) whenever a switch controller (71) opens the associated electronic switch (81).
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