The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 2025
Filed:
May. 25, 2022
Mitsubishi Heavy Industries Thermal Systems, Ltd., Tokyo, JP;
Yasuo Katayama, Tokyo, JP;
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 () is provided with: a light incidence surface () on which light is incident; a light emission surface () which faces the light incidence surface () and from which light incident from the light incidence surface () is emitted; and a flat plate-shaped light guide member () which guides the light incident from the light incidence surface () to the light emission surface (). The light guide member () has a widened portion () that is widened outward in a plate width direction from the light incidence surface () toward the light emission surface (), and in a cross-section parallel to the light emission surface () on the light emission surface () side of the light guide member (), the light guide member () 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 () than the plate thicknesses of the other portions.