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:
Jul. 11, 2006
Filed:
Jan. 27, 2004
Tadahiro Okazaki, Kyoto, JP;
Tadahiro Okazaki, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
An ultraviolet ray emitting element, a blue color converting layer containing a blue color light emitting fluorescent material that is excited by ultraviolet rays and emits blue light, a green color converting layer as the same and a red color converting layer as the same are prepared, and the blue color converting layer, the green color converting layer and the red color converting layer are stacked on the ultraviolet ray emitting element in this order. Consequently, it is possible to easily obtain white light that has high color rendering properties. In order to obtain white color that exerts high color rendering properties, the average particle sizes of the fluorescent materials are preferably made greater in the order of the blue color light emitting fluorescent material, the green color light emitting fluorescent material and the red color light emitting fluorescent material.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile