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:
Mar. 27, 2018
Filed:
Dec. 15, 2016
Coretronic Corporation, Hsin-Chu, TW;
Fang-Hsuan Su, Hsin-Chu, TW;
Hung-Ta Chien, Hsin-Chu, TW;
Fu-Chiang Hsu, Hsin-Chu, TW;
Fu-Ming Chuang, Hsin-Chu, TW;
Chi-Tang Hsieh, Hsin-Chu, TW;
Coretronic Corporation, Hsin-Chu, TW;
Abstract
A projection screen, adapted to receive an image beam, includes a transparent substrate, optical pillar structures, a light-scattering layer, Fresnel structures and a light-absorption layer. The transparent substrate has first surface and second surface opposing to each other. The optical pillar structures are located at the first surface, and between the light-scattering layer and the transparent substrate. Each optical pillar structure is arranged along the first direction. The Fresnel structures are located at the second surface, and disposed between the transparent substrate and the light-absorption layer. Each Fresnel structure has a reflective surface and a transmissive surface connected to the reflective surface. The image beam sequentially passes through the light-scattering layer, the optical pillar structures, the transparent substrate and travels to the reflective surfaces, and the image beam is reflected by the reflective surfaces and outputs from the projection screen. The half-gain angle in the first direction falls within 40°-85°.