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. 16, 2021
Filed:
Apr. 25, 2017
Kuraray Co., Ltd., Kurashiki, JP;
KURARAY CO., LTD., Kurashiki, JP;
Abstract
A diffuser plate capable of achieving excellent appearance quality when an image is projected. A transmissive diffuser plate including a microlens angle modulation distribution group provided on at least one of a light incident surface and a light emitting surface is provided. A microlens angle modulation distribution group includes a plurality of microlenses and an angle modulation part having an angle modulation distribution for angle-modulating a direction of main light emitted from each of the plurality of microlenses. When a ratio λ/P of a wavelength λ [μm] of the main light to an average arrangement period P [μm] of the microlens is denoted by θ [rad], and when the direction of the main light emitted from each of the plurality of microlenses is modulated by a modulation angle α [rad], a ratio α/θ of the modulation angle α to θ satisfies 0.1<α/θ<10.0.