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:
Jun. 11, 2024
Filed:
Sep. 12, 2023
Japan Display Inc., Tokyo, JP;
Junji Kobashi, Tokyo, JP;
JAPAN DISPLAY INC., Tokyo, JP;
Abstract
According to one embodiment, a polarization conversion element includes a first light guide including a first main surface and a side surface, a transmissive first polarization grating opposed to the side surface, and a reflective second polarization grating opposed to the first main surface. The first polarization grating is configured to diffract first circularly polarized light of unpolarized incident light and to diffract second circularly polarized light which rotates in a direction opposite to the first circularly polarized light in a direction different from the first circularly polarized light. The second polarization grating is configured to reflect the first circularly polarized light on the reflective surface.