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:
Oct. 13, 2020
Filed:
Aug. 21, 2019
Coretronic Corporation, Hsin-Chu, TW;
Chang-Hsuan Chen, Hsin-Chu, TW;
Chien-Chung Liao, Hsin-Chu, TW;
Coretronic Corporation, Hsin-Chu, TW;
Abstract
A projection apparatus and an illumination system are provided. The illumination system includes an excitation light source and a light wavelength conversion module. The excitation light source is adapted to provide an excitation beam. The light wavelength conversion module includes a first phosphor wheel and a second phosphor wheel. The second phosphor wheel is disposed adjacent to the first phosphor wheel, and the first phosphor wheel and the second phosphor wheel are respectively disposed on transmission paths of a first part and a second part of the excitation beam, such that during a period that the excitation light source is turned on, the first phosphor wheel and the second phosphor wheel are both irradiated by the excitation beam. The illumination system of the invention avails improving phosphor conversion efficiency and avoiding burning the phosphor powder. The projection apparatus has good performance.