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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.:

US 11563131 B1

PDFFull Text
Date of Patent:
Jan. 24, 2023

Filed:

May. 05, 2020

Illuminance sensor, electronic machine and 2d image sensor

Applicant:

Rohm Co., Ltd., Kyoto, JP;

Inventor:

Yoshitsugu Uedaira, Kyoto, JP;

Assignee:

ROHM Co., Ltd., Kyoto, JP;

Attorney:

Hamre, Schumann, Mueller & Larson, P.C.

Primary Examiner:

Herve-Louis Y Assouman

Assistant Examiner:

Christopher M Roland

Int. Cl.
CPC ...
H01L 31/0232 (2014.01); H01L 27/146 (2006.01); G02B 5/20 (2006.01); H01L 31/101 (2006.01); H01L 31/09 (2006.01); H01L 27/32 (2006.01); H01L 51/52 (2006.01); H01L 31/0216 (2014.01);
U.S. Cl.
CPC ...
H01L 31/02327 (2013.01); G02B 5/201 (2013.01); G02B 5/208 (2013.01); H01L 27/14621 (2013.01); H01L 27/14625 (2013.01); H01L 27/3227 (2013.01); H01L 27/3234 (2013.01); H01L 31/02162 (2013.01); H01L 31/09 (2013.01); H01L 31/101 (2013.01); H01L 51/5281 (2013.01);
Abstract

In an illuminance sensor, a slow axis of a first quarter-wave plate has a relation of +45° or −45° in regard to a polarization direction of a first linear polarization plate; a relation of a slow axis of a first portion of a second quarter-wave plate in regard to a polarization direction of a second linear polarization plate is the same with relation of the slow axis of the first quarter-wave plate in regard to the polarization direction of the first linear polarization plate, that is, +45° or −45°; and a relation of a slow axis of a second portion of the second quarter plate in regard to the polarization direction of the second linear polarization plate is −45° or +45° that is opposite in sign to the relation of the slow axis of the first quarter-plate in regard to the polarization direction of the first linear polarization plate.

Find Patent Forward Citations

Uedaira, Yoshitsugu. (2023). Illuminance sensor, electronic machine and 2d image sensor (U.S. Patent No. 11563131). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11563131

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