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:
May. 26, 2020
Filed:
Jul. 14, 2017
Lumens Co., Ltd., Yongin-si, Gyeonggi-do, KR;
LUMENS CO., LTD., Yongin-si, KR;
Abstract
A display apparatus is disclosed. The display apparatus includes: at least one LED display unit including a plurality of LED display panels outputting image lights; a light guide unit including a plurality of in-coupling zones where the image lights are received and a single out-coupling zone to which the received image lights are guided; a plurality of in-coupling holographic optical elements (HOEs) arranged in the in-coupling zones to define the propagation path of the image lights through the light guide unit; and a plurality of out-coupling HOEs arranged in the out-coupling zone to define a path through which the image lights guided through the light guide unit are sent outside the light guide unit.