Title:
LED LAMP DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/061638
Kind Code:
A1
Abstract:
[Problem] To provide an LED lamp device, the size of which can be reduced. [Solution] When normal lighting is performed by turning on a switch (20), a driving current is supplied from a power supply circuit (10) to LEDs (30A to 30T) in a light-emitting circuit (30), so that the current flows as shown by an arrow (F1A) and the LEDs (30A to 30T) emit light. At this time, in an auxiliary lighting circuit (40), a charging diode (54) in a charging circuit (50) is conducted and a charging current limited by a charging current limiting resistor (52) flows as shown by an arrow (F1B), so that a capacitor (70) is charged. When a power outage occurs, a discharging diode (64) in a discharge circuit (60) is conducted and the capacitor (70) discharges via the discharge circuit (60), so that a current flows as shown by an arrow (F1C) and the LED (30T) in the light-emitting circuit (30) emits light.
Inventors:
YOSHITO ATSUSHI (JP)
HONDA MASATO (JP)
NAKAJIMA MITSUO (JP)
HONDA MASATO (JP)
NAKAJIMA MITSUO (JP)
Application Number:
PCT/JP2012/061177
Publication Date:
May 02, 2013
Filing Date:
April 26, 2012
Export Citation:
Assignee:
TAIYO YUDEN KK (JP)
YOSHITO ATSUSHI (JP)
HONDA MASATO (JP)
NAKAJIMA MITSUO (JP)
YOSHITO ATSUSHI (JP)
HONDA MASATO (JP)
NAKAJIMA MITSUO (JP)
International Classes:
H05B37/02
Foreign References:
| JP2009205850A | 2009-09-10 | |||
| JP2009170341A | 2009-07-30 | |||
| JP2011082045A | 2011-04-21 | |||
| JPH10164770A | 1998-06-19 |
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Claims: