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. 28, 2020
Filed:
Dec. 28, 2018
Light Show Technology Co., Ltd., Tokyo, JP;
Akihiro Yamakage, Tokyo, JP;
Yufei Mei, Tokyo, JP;
LIGHT SHOW TECHNOLOGY CO., LTD., Tokyo, JP;
Abstract
A light source device for a projection display apparatus includes a phosphor, an excitation light source, a surface-curved dichroic mirror having a curved surface in which a side on which excitation light is incident is convexly curved, and a converging lens between the surface-curved dichroic mirror and the phosphor. The excitation light source is configured to output the excitation light for exciting the phosphor. The surface-curved dichroic mirror is configured to cause the excitation light from the excitation light source to be reflected on the curved surface and fluorescence from the phosphor to pass through the curved surface. The surface-curved dichroic mirror neither substantially converges nor substantially diverges the light that passes through, but performs a diverging operation on the excitation light that is reflected on the curved surface so as to form a virtual image.