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. 22, 2024
Filed:
Jul. 09, 2021
Samsung Electronics Co., Ltd., Suwon-si, KR;
Korea University Research and Business Foundation, Sejong Campus, Sejong-si, KR;
Yunhee Kim, Seoul, KR;
Hwi Kim, Seoul, KR;
Youngjae Kim, Seongnam-si, KR;
Hoon Song, Yongin-si, KR;
Hongseok Lee, Seoul, KR;
SAMSUNG ELECTRONICS CO., LTD., Suwon-si, KR;
Korea University Research and Business Foundation, Sejong Campus, Sejong-si, KR;
Abstract
A beam expanding film includes a first material layer and a photonic crystal layer that expands a width of incident light and emits light having an expanded width. The photonic crystal layer includes a first material layer and a plurality of second material layers buried in the first material layer. A holographic display apparatus includes a backlight unit configured to provide coherent collimated light; a beam expanding film described above and facing the backlight unit; a flat panel arranged between the backlight unit and the beam expanding film to provide a hologram; and a lens configured to focus a holographic image on a space.