Title:
ＬＥＤランプ
Document Type and Number:
Japanese Patent JP6542604
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To eliminate a situation in which an LED lamp falls into a non-lighting state when exchange from a halogen lamp to the LED lamp is performed.SOLUTION: An LED lamp includes an AC/DC conversion unit which is connected to a secondary-side terminal of an electronic transformer and converts an input AC voltage to a DC voltage, an LED driver to which the DC voltage output from the AC/DC conversion unit is inputted, an LED element driven by the LED driver, and a non-lighting prevention circuit which is connected in parallel to a load on the LED element side at a position between the terminal on the secondary side of the electronic transformer and the LED driver. The non-lighting prevention circuit has an impedance which is lower than the impedance of the load on the LED element side before start of lighting of the LED element, and higher than the impedance of the load on the LED element side when the LED element is turned on.SELECTED DRAWING: Figure 3
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Inventors:
Rock Saki Haruhiko
Yuki Hundred
Nishimura Keishin
Yuki Hundred
Nishimura Keishin
Application Number:
JP2015156789A
Publication Date:
July 10, 2019
Filing Date:
August 07, 2015
Export Citation:
Assignee:
Ushio, Inc.
Shinsei Electronics Co., Ltd.
Shinsei Electronics Co., Ltd.
International Classes:
H05B37/02; H01L33/00
Domestic Patent References:
| JP2015037010A |
Foreign References:
| US20120062141 | ||||
| WO2012057369A1 |
Attorney, Agent or Firm:
Patent Business Corporation Unias International Patent Office