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. 14, 2023
Filed:
Feb. 28, 2020
Applicant:
Sharp Kabushiki Kaisha, Sakai, JP;
Inventors:
William Frederick Smith, Oxford, GB;
David James Montgomery, Bampton, GB;
Assignee:
SHARP KABUSHIKI KAISHA, Sakai, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); G02B 5/30 (2006.01); G02F 1/137 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0172 (2013.01); G02B 5/3033 (2013.01); G02B 5/3083 (2013.01); G02F 1/137 (2013.01);
Abstract
An optical system and, specifically an HMD, is disclosed for increasing brightness efficiency of light transmitted from a display. By including one polarization selective mirror between a half mirror and a display and another polarization selective mirror between the half mirror and a lens, brightness efficiency is increased without a substantial increase in thickness.