Invention Grant
US09161414B2 Method of detecting a LED failure, a controller therefor, a lighting unit and lighting system
有权
检测LED故障的方法，其控制器，照明单元和照明系统
- Patent Title: Method of detecting a LED failure, a controller therefor, a lighting unit and lighting system
- Patent Title (中): 检测LED故障的方法，其控制器，照明单元和照明系统
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Application No.: US14026156Application Date: 2013-09-13
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Publication No.: US09161414B2Publication Date: 2015-10-13
- Inventor: Pascal Brancken , Viet Hoang Nguyen , Radu Surdeanu
- Applicant: NXP B. V.
- Applicant Address: NL Eindhoven
- Assignee: NXP, B.V.
- Current Assignee: NXP, B.V.
- Current Assignee Address: NL Eindhoven
- Priority: EP12187154 20121004
- Main IPC: G01R31/00
- IPC: G01R31/00 ; G01R31/08 ; H05B33/08 ; G01R31/26
Abstract:
Disclosed herein is a method of detecting an LED failure in a series-connected string of LEDs using a parameter indicative of a voltage difference between a voltage across the string at a predetermined relatively high current and a voltage across the string at a predetermined relatively low current. The disclosure extends to controllers configured to detect an LED failure in a string of LEDs, to LED lighting units comprising such controllers, and to lighting subsystems, for instance automobile lighting subsystems.
Public/Granted literature
- US20140097849A1 METHOD OF DETECTING A LED FAILURE, A CONTROLLER THEREFOR, A LIGHTING UNIT AND LIGHTING SYSTEM Public/Granted day:2014-04-10
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