Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
Lighting device and lighting device
Document Type and Number:
Japanese Patent JP6297130
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress flickering of a light source when power-up, without deteriorating power factor while lighting the light source.SOLUTION: A DC-DC conversion unit 22 of an LED lighting device 12 outputs a DC power by performing improvement of power factor of DC power and adjustment of voltage by switching operation. A control unit 24 of the LED lighting device 12 compares the voltage of DC power output from the DC-DC conversion unit 22 with predetermined voltage by every first period before an LED 11 is lighted by receiving DC power supply, and by every second period longer than the first period after the LED 11 is lighted, and controls the switching operation of the DC-DC conversion unit 22 on the basis of comparison result.SELECTED DRAWING: Figure 1

Inventors:
Okumura Shinichiro
Application Number:
JP2016255141A
Publication Date:
March 20, 2018
Filing Date:
December 28, 2016
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Mitsubishi Electric Corporation
Mitsubishi Electric Lighting Co., Ltd.
International Classes:
H05B37/02
Domestic Patent References:
JP2006066226A
Attorney, Agent or Firm:
Mizoi International Patent Service Corporation