Invention Grant
US09271350B2 Lighting control circuit, lamp, and lighting control method using the lighting control circuit
有权
照明控制电路,灯和照明控制方法采用照明控制电路
- Patent Title: Lighting control circuit, lamp, and lighting control method using the lighting control circuit
- Patent Title (中): 照明控制电路,灯和照明控制方法采用照明控制电路
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Application No.: US14013455Application Date: 2013-08-29
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Publication No.: US09271350B2Publication Date: 2016-02-23
- Inventor: Masaharu Urano , Hidefumi Nakashima , Shigemi Hagiwara
- Applicant: Masaharu Urano , Hidefumi Nakashima , Shigemi Hagiwara
- Applicant Address: JP Tokyo
- Assignee: RICOH COMPANY, LTD.
- Current Assignee: RICOH COMPANY, LTD.
- Current Assignee Address: JP Tokyo
- Agency: Cooper & Dunham LLP
- Priority: JP2012-191133 20120831
- Main IPC: H05B37/00
- IPC: H05B37/00 ; H05B33/08

Abstract:
A lighting control circuit includes a rectifier connected to an electric ballast to which a commercial AC power is supplied, and configured to convert an AC to a DC, a series light emitter a plurality of solid-state light-emitting elements is connected in series, a smoothing capacitor provided in parallel with the series light emitter in a current supply line between the rectifier and the series light emitter, and configured to eliminate an AC component included in the DC from an output side of the rectifier, and a switching control circuit configured to generate an output voltage equal to an output voltage from the electric ballast when a fluorescent lamp starts up upon the connection of the fluorescent lamp to the electric ballast as a startup voltage in the startup of the series light emitter.
Public/Granted literature
- US20140062320A1 LIGHTING CONTROL CIRCUIT, LAMP, AND LIGHTING CONTROL METHOD USING THE LIGHTING CONTROL CIRCUIT Public/Granted day:2014-03-06
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