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. 31, 2020
Filed:
Jan. 24, 2019
Coretronic Corporation, Hsin-Chu, TW;
Yi-Hsuang Weng, Hsin-Chu, TW;
Coretronic Corporation, Hsin-Chu, TW;
Abstract
An illumination system includes an excitation light source and a wavelength conversion element. The excitation light source provides an excitation beam. The wavelength conversion element has a wavelength conversion region, a reflective region, and a light transmissive region. The wavelength conversion region and the reflective region form an annular region. The light transmissive region is surrounded by the annular region, wherein the excitation beam passes through the light transmissive region of the wavelength conversion element. The illumination system of the disclosure is small in size and achieves favorable optical efficiency. A projection device including the illumination system is also provided.