Title:
LUMINAIRE
Document Type and Number:
Japanese Patent JP2019046763
Kind Code:
A
Abstract:
To provide a luminaire which can make luminance of a light emitting surface uniform and in which a stripe pattern hardly appears.SOLUTION: A luminaire includes: a mounting substrate on which a plurality of LEDs 42 are mounted; a plate-like light guide plate 50 for guiding at least part of emission light from the plurality of LEDs 42; and a plurality of optical structures 71 provided on any one surface of the light guide plate 50 with intervals, and for changing the travelling direction of the light. The plurality of optical structures 71 include: a first arrangement portion 72 in which the intervals between the optical structures reduce in arithmetic series as they are separated from the LEDs in an optical axis direction, and which is disposed on the LEDs 42 side; a second arrangement portion 73 in which the intervals between the optical structures are constant, and which is disposed on the side separated from the LEDs 42; and a third arrangement portion 74 which is disposed between the first arrangement portion 72 and a second arrangement portion 73, and in which the intervals of the optical structures are smaller than the minimum interval of the adjacent optical structures in the first arrangement portion 72 and larger than the interval of the adjacent optical structures in the second arrangement portion 73 and they become smaller as they are separated from the LEDs 42.SELECTED DRAWING: Figure 3
Inventors:
MATSUZAKI JUNPEI
Application Number:
JP2017172079A
Publication Date:
March 22, 2019
Filing Date:
September 07, 2017
Export Citation:
Assignee:
PANASONIC IP MAN CORP
International Classes:
F21S2/00
Attorney, Agent or Firm:
Patent Corporation yki International Patent Office