Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
June 1, 2021
Patent Application Number
16212771
Date Filed
December 7, 2018
Patent Citations Received
Patent Primary Examiner
Patent abstract
A light guide device includes a light guide plate that induces a light emission of a light source. The light guide plate includes an incident portion that is incident light emitted from a light source, a reflecting portion that reflects the light from the incident portion to an inside of the light guide plate, and an emitting portion that emits the light from the reflecting portion to an outside of the light guide plate. The emitting portion is provided in a thin elongated shape on a first portion of a circumferential surface of the light guide plate. The reflecting portion includes an expansion surface that expands the light from the incident portion to a circumferential direction of the light guide plate.
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