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:
May. 24, 2022
Filed:
Dec. 28, 2020
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Yusaku Nishikawa, Osaka, JP;
Abstract
The first dichroic filter is in a region including a circumference having a first radius, transmits source light and reflects fluorescence. The phosphor is in a region having a predetermined angular width of a region including a circumference having the first radius, and excited by source light to generate fluorescence. The first transmission window is in a region different from the region of the phosphor and transmits incident light. The second dichroic filter is in a region having a predetermined angular width of a region including a circumference having a second radius, and transmits source light and reflects incident light. The second transmission window is in a region different from the second dichroic filter and transmits source light. The diffusion film is on one of the first and second transmission windows, and diffuses incident light.