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Title:
LIGHTING APPARATUS
Document Type and Number:
Japanese Patent JP2018174103
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a lighting apparatus capable of improving reliability for temperature.SOLUTION: A lighting apparatus 1 includes a light source unit 3, a lighting circuit 80, a detector 13, and a control section 85. The light source unit 3 has an LED module 31, and a case housing the LED module 31. The lighting circuit 80 is fed with power from a battery pack and lights the LED module 31. The detector 13 includes a thermo-sensitive element RT, the electric resistance value of which changes according to the temperature of the light source unit 3, and the detection value changes according to change of the electric resistance value of the thermo-sensitive element RT. When the detection value by the detector 13 reaches a first threshold level corresponding to a first specified temperature, the control section 85 controls the lighting circuit 80 to reduce the optical output from the LED module 31, and when reaching a second specified temperature corresponding to a second specified temperature higher than the first specified temperature, controls the lighting circuit 80 to unlight the LED module 31.SELECTED DRAWING: Figure 1

Inventors:
YANG JONG-RUEY
Application Number:
JP2017072691A
Publication Date:
November 08, 2018
Filing Date:
March 31, 2017
Export Citation:
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Assignee:
PANASONIC IP MAN CORP
International Classes:
H05B37/02; F21L4/00; F21V14/02; F21V23/00; F21V25/10
Domestic Patent References:
JP2016149272A2016-08-18
JP2009272227A2009-11-19
JP2016091730A2016-05-23
JP2016051598A2016-04-11
Attorney, Agent or Firm:
Patent business corporation Hokuto patent office