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:
Feb. 24, 2026
Filed:
May. 16, 2023
Stanley Electric Co., Ltd., Tokyo, JP;
Yasuo Toko, Tokyo, JP;
STANLEY ELECTRIC CO., LTD., Tokyo, JP;
Abstract
A lighting apparatus including: a light source; a light condensing unit; a liquid crystal element disposed in a focal position of light condensed by the light condensing unit; a projection lens; a first polarizer disposed between the light source and the LC element; a second polarizer disposed between the LC element and the projection lens; and a diffractive optical element disposed between the light source and the LC element; where the diffractive optical element has light modulation regions switching between a first state in which the refractive index changes and a second state in which the refractive index is uniform, where a diffractive effect is generated with respect to an entering light in the first state, and where each light modulation region is disposed at a position at which the light enters and closer to the light source than the focal position.