Invention Grant
US08575839B2 Headlamp LED lighting apparatus and vehicle headlamp lighting system
有权
前照灯LED照明装置和车灯前照灯系统
- Patent Title: Headlamp LED lighting apparatus and vehicle headlamp lighting system
- Patent Title (中): 前照灯LED照明装置和车灯前照灯系统
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Application No.: US13381876Application Date: 2009-09-10
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Publication No.: US08575839B2Publication Date: 2013-11-05
- Inventor: Yu Inoue , Takashi Ohsawa
- Applicant: Yu Inoue , Takashi Ohsawa
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- International Application: PCT/JP2009/004497 WO 20090910
- International Announcement: WO2011/030381 WO 20110317
- Main IPC: B60Q1/04
- IPC: B60Q1/04
Abstract:
A headlamp LED lighting apparatus, which lights an LED block 2 having a plurality of LEDs connected in series, samples the output voltage of the headlamp LED lighting apparatus, calculates the average voltage during every prescribed interval, and has a storage unit for storing the average voltage during every prescribed interval calculated. A control circuit 8 compares the voltage variation in the average voltage during every prescribed interval read out of the storage unit with a prescribed threshold, and decides an LED failure of the LED block 2 from a result of the comparison.
Public/Granted literature
- US20120098430A1 HEADLAMP LED LIGHTING APPARATUS AND VEHICLE HEADLAMP LIGHTING SYSTEM Public/Granted day:2012-04-26
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