Invention Grant
- Patent Title: LED driver, lighting equipment and light fixture
- Patent Title (中): LED驱动器，照明设备和灯具
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Application No.: US15044634Application Date: 2016-02-16
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Publication No.: US09521717B2Publication Date: 2016-12-13
- Inventor: Miyo Kangyo , Koji Watanabe , Kazuhiro Kumada , Shinichi Murakami
- Applicant: Panasonic Intellectual Property Management Co., Ltd.
- Applicant Address: JP Osaka
- Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Renner, Otto, Boisselle & Sklar, LLP
- Priority: JP2015-041688 20150303
- Main IPC: H05B33/08
- IPC: H05B33/08 ; H05B37/02
Abstract:
When supplying an LED light source with a first output voltage that is equal to or higher than a threshold voltage, an LED driver causes a DC power supply to output a first DC voltage and causes a switching regulator to supply the LED light source with the first output voltage. When supplying the LED light source with a second output voltage that is below the threshold voltage, the LED driver causes the DC power supply to output a second DC voltage lower than the first DC voltage and causes the dropper regulator to supply the LED light source with the second output voltage.
Public/Granted literature
- US20160262226A1 LED DRIVER, LIGHTING EQUIPMENT AND LIGHT FIXTURE Public/Granted day:2016-09-08
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