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:
Nov. 28, 2023
Filed:
Aug. 27, 2019
Mitsubishi Electric Corporation, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
An illumination device that simulates the sky, includes a light source that emits first light; a light-emitting part that allows the first light to enter, guides the entered first light by means of total reflection while scattering the first light, and emits the scattered light from a light emission surface; a back surface reflective part that is provided to face a back surface as a surface of the light-emitting part on a side opposite to the light emission surface and reflects light emitted from the back surface of the light-emitting part; a frame that includes a part situated at least in front of the light emission surface of the light-emitting part; and an optical member that is provided between the light emission surface of the light-emitting part and the part of the frame and reflects a part of the light emitted from the light emission surface of the light-emitting part.