Title:
照明器具
Document Type and Number:
Japanese Patent JP7122600
Kind Code:
B2
Abstract:
To provide a lighting fixture capable of achieving reduction in thickness while reducing luminance unevenness.SOLUTION: A lighting fixture 2 includes: a first light emitting element 48; and a first light guide plate 16 having a first end surface 60 where the light from the first light emitting element 48 enters, and a first side surface 62 from which the light which has entered the first end surface 60 emits. The first light guide plate 16 includes: a first incident part 56 which extends in a cylindrical manner from one end part 56a to the other end part 56b, and in which the first end surface 60 is formed at the one end part 56a; and a first emission part 58 which extends radially inside from the other end part 56b of the first incident part 56 so as to close the other end part 56b, and in which the first side surface 62 is formed. The shape of the first emission part 58 is formed in such a manner that the light extraction efficiency of the light extracted from an inner peripheral part of the first side surface 62 is larger than the light extraction efficiency of the light extracted from an outer peripheral part of the first side surface 62.SELECTED DRAWING: Figure 10
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Inventors:
Atsushi Ishimori
Takashi Arai
Takashi Tsuji
Akihiro Hirano
Takashi Arai
Takashi Tsuji
Akihiro Hirano
Application Number:
JP2018032983A
Publication Date:
August 22, 2022
Filing Date:
February 27, 2018
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
F21S2/00; F21S8/04; F21V19/00; G02B6/00
Domestic Patent References:
| JP2011222420A | ||||
| JP2015138758A | ||||
| JP2011159435A | ||||
| JP2009163016A | ||||
| JP2013080679A | ||||
| JP2017208279A | ||||
| JP2015065101A |
Foreign References:
| WO2014068932A1 | ||||
| CN103672634A |
Attorney, Agent or Firm:
Hiroi Arai
Teraya Eisaku
Shinichi Michizaka
Teraya Eisaku
Shinichi Michizaka