Title:
ＬＥＤ駆動回路
Document Type and Number:
Japanese Patent JP6399884
Kind Code:
B2
Abstract:
An LED drive circuit includes a rectification circuit configured to rectify an alternating-current voltage that is input via a dimmer circuit, a delay circuit having a switch, and a light emitting unit including an LED array including LEDs connected in series, wherein the delay circuit turns on the switch when a predetermined time elapses after the alternating-current current is input, and the rectification circuit and the LED array are directly connected when the switch is on.
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Inventors:
Takashi Akiyama
Application Number:
JP2014208889A
Publication Date:
October 03, 2018
Filing Date:
October 10, 2014
Export Citation:
Assignee:
CITIZEN WATCH CO.,LTD.
Citizen Electronics Co., Ltd.
Citizen Electronics Co., Ltd.
International Classes:
H01L33/00; H05B37/02; H05B44/00
Domestic Patent References:
| JP2014192915A | ||||
| JP2014013866A | ||||
| JP2013020931A | ||||
| JP2014516452A | ||||
| JP2014096576A | ||||
| JP2013115003A | ||||
| JP2013500599A | ||||
| JP2012150955A | ||||
| JP2011198671A | ||||
| JP2009232625A | ||||
| JP2009129819A | ||||
| JP2007126041A | ||||
| JP5030649A |
Foreign References:
| US20120293085 | ||||
| US20080088252 |
Attorney, Agent or Firm:
Akira Miyajima