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:
Feb. 18, 2025
Filed:
May. 25, 2022
Fujifilm Corporation, Tokyo, JP;
Hiroshi Sato, Minamiashigara, JP;
Katsumi Sasata, Minamiashigara, JP;
Yukito Saitoh, Minamiashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
Provided are: a light guide element in which the occurrence of multiple images can be suppressed and a wide viewing angle can be obtained; and an image display apparatus including this light guide element. The light guide element includes: a light guide plate; and first A, first B, second A, and second B incidence diffraction elements and first A, first B, second A, and second B emission diffraction elements, in which the first A and second A incidence diffraction elements and the first B and second B incidence diffraction elements diffract incident light in different directions to be incident into the light guide plate, periods of diffraction structures of the first A and first B incidence diffraction elements are different from periods of diffraction structures of the second A and second B incidence diffraction elements, periods of diffraction structures of the first A and first B emission diffraction elements are different from periods of diffraction structures of the second A and second B emission diffraction elements, the emission diffraction elements are disposed at overlapping positions in a main surface of the light guide plate, and periodic directions of the diffraction structures of the first A and first B emission diffraction elements intersect with periodic directions of the diffraction structures of the second A and second B emission diffraction elements.