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:
Oct. 14, 2025
Filed:
Feb. 13, 2023
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Ryo Hatsumi, Kanagawa, JP;
Hisao Ikeda, Kanagawa, JP;
Daiki Nakamura, Kanagawa, JP;
Takeya Hirose, Kanagawa, JP;
Yosuke Tsukamoto, Kanagawa, JP;
Abstract
A thin optical device having high light utilization efficiency and less chromatic aberration and a small electronic device including the optical device are provided. The thin optical device includes a first reflective polarizing plate, a lens, an optical rotator, a retardation plate, and a second reflective polarizing plate. The optical device can be a thin optical device by rotation of the polarization plane of linearly polarized light with the optical rotator and utilization of a property of selectively reflecting circularly polarized light of the second reflective polarizing plate. Furthermore, the optical device does not use a half mirror and thus has a property of high light utilization efficiency. When the second reflective polarizing plate has a layered structure, chromatic aberration of an optical system can be reduced.