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:
Apr. 07, 2026
Filed:
Nov. 14, 2022
Shenzhen Optiave Display Technologies Co. Limited, Shenzhen, CN;
Shenzhen Optiave Display Technologies Co. Limited, Shenzhen, CN;
Abstract
A display apparatus includes an optical engine and a stack of expander devices. The optical engine forms input light which comprises a plurality of input light beams representing an input image. The stack of expander devices forms output light by diffractively expanding the input light. The output light includes a plurality of output light beams representing the input image. The stack includes a first expander device and a second expander device. The grating period of each diffractive element of the first expander device is equal to the grating period of a corresponding diffractive element of the second expander device.
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