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:
Jul. 27, 2021
Filed:
Mar. 06, 2015
Sony Corporation, Tokyo, JP;
Katsuyuki Akutsu, Kanagawa, JP;
Hideo Nagasaka, Tokyo, JP;
Yusuke Kajio, Tokyo, JP;
Takashi Mizusawa, Tokyo, JP;
Daisuke Tsukuda, Saitama, JP;
Kazutatsu Tokuyama, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
In some embodiments, a head mounted display is provided, comprising a light guide, at least first and second diffraction gratings, alignment marks Aand Bassociated with the first diffraction grating, and alignment marks Aand Bassociated with the second diffraction grating. The first diffraction grating may be disposed on a first surface of the light guide, the first surface facing away from a light input. The second diffraction grating may be disposed on a second surface of the light guide, the second surface facing towards the light input. The second diffraction grating may be adapted to diffract at least some of the light input into the light guide, and the first diffraction grating may be adapted to diffract at least some light transmitted through the light guide back into the light guide.