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. 22, 2012
Filed:
Aug. 14, 2009
Applicants:
Hidenori Takahashi, Saitama, JP;
Noriyoshi Kumazawa, Saitama, JP;
Inventors:
Hidenori Takahashi, Saitama, JP;
Noriyoshi Kumazawa, Saitama, JP;
Assignee:
Fujinon Corporation, Saitama-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed is a light source device that has lower costs and lower power consumption compared to a halogen lamp, and has the same spectral characteristics as the halogen lamp. The light source device includes a white LED that emits White light having an emission peak in a blue range and an optical filter that partially reduces the quantity of light in the blue range in the white light emitted from the white LED such that the spectral characteristics of the white light emitted from the white LED are close to those of light emitted from a halogen lamp.