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:
Jun. 02, 2015
Filed:
Nov. 17, 2010
Applicant:
Masateru Matsubara, Tokyo, JP;
Inventor:
Masateru Matsubara, Tokyo, JP;
Assignee:
NEC Display Solutions, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/20 (2006.01); H04N 9/31 (2006.01); G03B 33/06 (2006.01); F21V 13/14 (2006.01);
U.S. Cl.
CPC ...
G03B 21/204 (2013.01); G03B 21/2033 (2013.01); G03B 21/208 (2013.01); H04N 9/3161 (2013.01); G03B 21/2066 (2013.01); G03B 33/06 (2013.01); F21V 13/14 (2013.01);
Abstract
A light source apparatus includes excitation light sources, a phosphor unit, a dichroic mirror that reflects excitation light supplied from the excitation light sources toward the phosphor unit and that transmits fluorescent light emitted from the phosphor unit, and a collimator lens that is provided between the dichroic mirror and the phosphor unit and whose focal distance varies according to the wavelength. The phosphor unit is arranged at a position determined by the focal distance of the collimator lens for the fluorescent wavelength. The collimator lens includes low-dispersion lenses and a high-dispersion lens.