Title:
導光板及びこれを用いた発光装置
Document Type and Number:
Japanese Patent JP7391916
Kind Code:
B2
Abstract:
The purpose of the present invention is to provide a light guide plate with which it is possible to prevent light unevenness and improve appearance, and a light emitting device using the same. A light guide plate (11) is provided with: a light incidence surface (12) on which light is incident; a light emission surface (13) which faces the light incidence surface (12) and from which light incident from the light incidence surface (12) is emitted; and a flat plate-shaped light guide member (14) which guides the light incident from the light incidence surface (12) to the light emission surface (13). The light guide member (14) has a widening part (16) that widens outward in a plate width direction from the light incidence surface (12) toward the light emission surface (13), and in a cross-section parallel to the light emission surface (13) on the light emission surface (13) side of the light guide member (14), the light guide member (14) has a larger plate thickness at least on one end side in the plate width direction on the side farther from the light incidence surface (12) than the plate thicknesses of the other portions.
Inventors:
Yasuo Katayama
Application Number:
JP2021101564A
Publication Date:
December 05, 2023
Filing Date:
June 18, 2021
Export Citation:
Assignee:
Mitsubishi Heavy Industries Thermal Systems, Ltd.
International Classes:
F21V8/00; B60Q3/14; B60Q3/64
Domestic Patent References:
| JP2006066399A | ||||
| JP2020013707A | ||||
| JP2020155265A |
Attorney, Agent or Firm:
Takaharu Fujita
Takaori Mitoma
Miki Kawakami
Daisuke Nagata
Takaori Mitoma
Miki Kawakami
Daisuke Nagata
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