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:
May. 19, 2020
Filed:
Oct. 07, 2016
Dai Nippon Printing Co., Ltd., Tokyo, JP;
DAI NIPPON PRINTING Co., Ltd., Tokyo, JP;
Abstract
An optical sheet, a screen, and a display apparatus capable of reducing speckles are provided. An optical sheet () includes a particle layer () including a transparent retaining part () having a predetermined thickness and a particle () that is accommodated in a cavity () formed in the retaining part () and includes a first portion () and a second portion () having different dielectric constants. The first portion () includes a transparent first main portion () and a first diffusion component () that diffuses light. The second portion () includes a transparent second main portion () and a second diffusion component () that diffuses light. The first diffusion component () and the second diffusion component () have a diameter d satisfying the following conditional expression (1):0.1 μm≤d≤15 μm  (1).