Invention Grant
- Patent Title: LED device and LED driver
- Patent Title (中): LED装置和LED驱动器
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Application No.: US12469206Application Date: 2009-05-20
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Publication No.: US08120283B2Publication Date: 2012-02-21
- Inventor: Shinichi Tanaka , Kiyoshi Narisawa
- Applicant: Shinichi Tanaka , Kiyoshi Narisawa
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent William B. Kempler; Wade J. Brady, III; Frederick J. Telecky, Jr.
- Priority: JP2008-131784 20080520
- Main IPC: H05B37/02
- IPC: H05B37/02
Abstract:
A LED device having a LED array, LED driver ICs, DC-DC converter, a first feedback circuit consisting of voltage dividing resistors, and a headroom voltage monitoring circuit having controller and second feedback circuit. In second feedback circuit, headroom voltages obtained at output current terminals of the LED driver ICs, are fed back to DC-DC converter.
Public/Granted literature
- US20090289559A1 LED DEVICE AND LED DRIVER Public/Granted day:2009-11-26
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