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. 02, 2010
Filed:
Jul. 25, 2007
Yoichi Ogawa, Ibaraki, JP;
Masataka Sato, Ibaraki, JP;
Katsusuke Shimazaki, Ibaraki, JP;
Eiji Koyama, Ibaraki, JP;
Hiroyuki Tsukamoto, Ibaraki, JP;
Toshihiro Yamanaka, Ibaraki, JP;
Yoichi Ogawa, Ibaraki, JP;
Masataka Sato, Ibaraki, JP;
Katsusuke Shimazaki, Ibaraki, JP;
Eiji Koyama, Ibaraki, JP;
Hiroyuki Tsukamoto, Ibaraki, JP;
Toshihiro Yamanaka, Ibaraki, JP;
Hitachi Maxell, Ltd., Ibaraki-shi, JP;
Abstract
A lighting device includes a plurality of self-luminous elements formed on a substrate and emitting different wavelengths of light from each other, a hemispherical lens structure formed on the substrate to cover the self-luminous elements, and a plurality of translucent spherical particles covering a surface of the lens structure. Light emitted from the self-luminous elements passes through the lens structure and enters the translucent spherical particles where its direction is largely inclined to scatter due to a difference in refractive index between the translucent spherical particles and air. Consequently, different wavelengths of light from the self-luminous elements are mixed to produce a desired color of light.