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. 18, 2025
Filed:
Apr. 15, 2020
Applicant:
Dispelix Oy, Espoo, FI;
Inventor:
Juuso Olkkonen, Espoo, FI;
Assignee:
DISPELIX OY, Espoo, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/42 (2006.01); G02B 27/01 (2006.01);
U.S. Cl.
CPC ...
G02B 27/4205 (2013.01); G02B 27/0172 (2013.01); G02B 2027/0123 (2013.01);
Abstract
The invention concerns a diffractive waveguide element for a personal display device, the element comprising a waveguide body (), and at least two grating regions () arranged on the waveguide body (), at least some of the grating regions adapted to expand the exit pupil of the element. According to the invention, the grating regions () are positioned with respect to each other so that and are provided with gratings having different grating vectors so that the grating regions () interact to combine the functions of exit pupil expansion and outcoupling on at least some parts of the element. The invention allows for efficient use of waveguide area.