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:
Nov. 28, 2023
Filed:
Apr. 27, 2022
Coretronic Corporation, Hsin-Chu, TW;
Hung-Ta Chien, Hsin-Chu, TW;
Coretronic Corporation, Hsin-Chu, TW;
Abstract
An optical waveguide, including a first structural layer, a second structural layer, a first light-guiding element, and multiple second light-guiding elements, is provided. The light-guiding elements are a partially penetrating and partially reflective layer. Multiple first sub-beams in an image beam are transmitted in the first or the second structural layer by a coupling inclined surface. Each first sub-beam forms multiple second sub-beams after being transmitted by the first or the second light-guiding elements. Some of the second sub-beams are coupled out of the optical waveguide by the second light-guiding elements, thereby enabling the image beam to expand in a first direction. For a portion of the visible light waveband, a trend of transmittance of the partially penetrating and partially reflective layer changing as a wavelength increases is opposite to a trend of transmittance of the first structural layer or the second structural layer changing as the wavelength increases.