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. 22, 2022
Filed:
Dec. 20, 2018
Applicant:
Dispelix Oy, Espoo, FI;
Inventor:
Kasimir Blomstedt, Espoo, FI;
Assignee:
DISPELIX OY, Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); F21V 8/00 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0172 (2013.01); G02B 6/0016 (2013.01); G02B 6/0035 (2013.01); G02B 6/0048 (2013.01); G02B 6/0076 (2013.01); G02B 2027/0123 (2013.01);
Abstract
The invention provides a diffractive waveguide element, waveguide stack, personal display and method of forming a viewable image. The element comprises a waveguide region defined by two optical surfaces between which light can propagate by total internal reflections, the optical surfaces having surface profiles, and at least one diffractive grating capable of modifying the light filed within the waveguide region. According to the invention, the surface profile of at least one of said optical surfaces is a staircase profile.