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. 31, 2026
Filed:
Jun. 13, 2022
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Abstract
A light projection apparatus includes a first mirror and a second mirror facing each other and extending in a first direction and an optical waveguide layer being located between the first mirror and the second mirror, having a structure in which a refractive index and/or a thickness can be changed, and guiding light in the first direction. The first mirror has light transmissivity higher than that of the second mirror, at least part of the light propagating in the optical waveguide layer is emitted outside therefrom, and an emission angle of light to be emitted from the first mirror can be changed in a range from an angle θto an angle θ(>θ) by the refractive index and/or the thickness of the optical waveguide layer being changed. First light emitted at the angle θis projected vertically downward relative to second light emitted at the angle θ.