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. 09, 2021
Filed:
Oct. 11, 2018
Tianma Japan, Ltd., Kanagawa, JP;
Koji Shigemura, Kawasaki, JP;
Kunihiro Shiota, Kawasaki, JP;
TIANMA JAPAN, LTD., Kanagawa, JP;
Abstract
Provided is a microlouver (optical element) having a transparent layer inclined to attain a desired viewing angle. The optical element includes patterned transparent layer and light absorbing layer on a transparent substrate. At least a part of the members of the transparent layer and the light absorbing layer are inclined with respect to the normal to the plane of the transparent substrate where patterns of the transparent layer and the light absorbing layer are provided. The inclination satisfies |α'(x)−β(x)|<φ, where α′(x) represents a first angle which is an outgoing angle of light transmitted through the transparent layer from the transparent substrate at a point x on the plane, β(x) represents a second angle which is an angle of sight of an observer, and φ represents a third angle which is a threshold angle to attain the lowest desired brightness.