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:
Dec. 29, 2020
Filed:
Apr. 07, 2016
Applicant:
Kuraray Co., Ltd., Kurashiki, JP;
Inventors:
Assignee:
KURARAY CO., LTD., Kurashiki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/02 (2006.01); G02B 3/00 (2006.01); G03B 21/62 (2014.01); G02F 1/1335 (2006.01);
U.S. Cl.
CPC ...
G02B 5/0231 (2013.01); G02B 3/00 (2013.01); G02B 3/0043 (2013.01); G02B 5/02 (2013.01); G02B 5/0278 (2013.01); G03B 21/62 (2013.01); G02B 5/0268 (2013.01); G02F 1/133504 (2013.01);
Abstract
A composite diffuser plate capable of inhibiting luminance unevenness from occurring locally is described. The composite diffuser plate includes a first diffuser plate and a second diffuser plate arranged in this order from an incident side. At least one of the first diffuser plate and the second diffuser plate is composed of a random microlens array including multiple microlenses. The microlenses include a plurality of parameters defining a lens shape. At least one of the plural parameters is randomly distributed. The random microlens array causes a phase difference to be generated in transmitted light.