Title:
ILLUMINATION LAMP
Document Type and Number:
Japanese Patent JP2018029081
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To acquire an illumination lamp which can acquire uniformity of light emission even when the number of LEDs is decreased, in the illumination lamp in which a plurality of LEDs are arrayed.SOLUTION: An illumination lamp 100 includes: a plurality of light sources (LED 51) which are arranged at an interval K and which radiate light of light intensity C at a light distribution angle H; and a translucent material (cylindrical pipe 60) which is arranged so that a distance with the light source (LED 51) in a light emission direction of the light source (LED 51) is a distance T, in a state where the light source (LED 51) is covered, and which has light diffusivity for diffusing the light radiated from the light source (LED 51) at a diffusion degree B. The diffusion degree B is an irradiation angle in which 50% of light intensity can be acquired with a peak value of the light intensity of the light radiated from the light source (LED 51) and transmitting the translucent material (cylindrical pipe 60) being 100%, and when a value determined by the light distribution angle H and the light intensity C of the light source (LED 51) and the diffusion degree B of the translucent material (cylindrical pipe 60) is defined as F, interval K≤distance T+F is satisfied.SELECTED DRAWING: Figure 1
Inventors:
NOGUCHI TAKUSHI
Application Number:
JP2017223684A
Publication Date:
February 22, 2018
Filing Date:
November 21, 2017
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
F21K9/275; F21K9/66
Domestic Patent References:
| JP2008103200A | 2008-05-01 | |||
| JP2008305785A | 2008-12-18 | |||
| JP2011128640A | 2011-06-30 | |||
| JP6250118B2 | 2017-12-20 |
Attorney, Agent or Firm:
Mizoi International Patent Service Corporation