Title:
LEDランプ装置
Document Type and Number:
Japanese Patent JP5507517
Kind Code:
B2
Abstract:
An LED lamp device of the invention includes a power supply unit (102, 103) supplied with an alternating-current power supply voltage, and an LED lamp (106) constituted by one or a plurality of serially connected LEDs connected to output terminals of the power supply unit (102, 103). The power supply unit (102) obtains a rectified wave of the alternating-current power supply voltage, admits electric power for only part of a time period in which the voltage of the rectified wave corresponding to each half period of the wave of the alternating-current power supply voltage is higher than or equal to a predetermined value, and uses the electric power as power for lighting the LED lamp (106).
Inventors:
Yutaka Saito
Yoshie Ozaki
Narikawa Toshiaki
Tsutomu Ota
Yoshie Ozaki
Narikawa Toshiaki
Tsutomu Ota
Application Number:
JP2011216567A
Publication Date:
May 28, 2014
Filing Date:
September 30, 2011
Export Citation:
Assignee:
Naoko Co., Ltd.
International Classes:
H05B37/02; H01L33/00; H05B44/00
Domestic Patent References:
| JP2009200053A | ||||
| JP4340334A | ||||
| JP2276420A | ||||
| JP1197747A | ||||
| JP7273371A | ||||
| JP997925A | ||||
| JP4337292A | ||||
| JP746844A |
Attorney, Agent or Firm:
Shun Hosaka