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:
Jul. 22, 2025
Filed:
Aug. 02, 2022
Shenzhen Qize Technology Partnership (Limited Partnership), Shenzhen, CN;
SHENZHEN QIZE TECHNOLOGY PARTNERSHIP (LIMITED PARTNERSHIP), Shenzhen, CN;
Abstract
A display apparatus for displaying a virtual image (VIMG) includes a rotating expander device (EPE) to form light beams (B,B) of output light (OUT) by expanding light beams (B,B) of input light (IN), the expander device (EPE) includes: a waveguide plate (SUB), an in-coupling element (DOE) to form first guided light (B) and second guided light (B) by coupling input light (IN) into the waveguide plate (SUB), a first out-coupling element (DOE) to form output light (OUT) by coupling the first guided light (B) out of the waveguide plate (SUB), and a second out-coupling element (DOE) to form output light (OUT) by coupling the second guided light (B) out of the waveguide plate (SUB). The in-coupling element (DOE) has a first input grating vector (V) and a second input grating vector (V), and an angle (α) between the first and second input grating vectors is between 60° and 120°.