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.

Date of Patent:
Jun. 14, 2016

Filed:

Jun. 18, 2015
Applicant:

Casio Computer Co., Ltd., Tokyo, JP;

Inventor:

Takeshi Miyazaki, Fussa, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/00 (2006.01); G03B 21/20 (2006.01); G02B 27/10 (2006.01); H04N 9/31 (2006.01);
U.S. Cl.
CPC ...
G03B 21/204 (2013.01); G02B 27/102 (2013.01); G03B 21/2013 (2013.01); H04N 9/3114 (2013.01); H04N 9/3158 (2013.01); H04N 9/3164 (2013.01);
Abstract

A light source unit includes a red light source, a first blue-light source, a fluorescent material, a second blue light source and an optical system. The red light source emits light in red wavelength range. The first blue-light source emits light in a first blue-wavelength range. The fluorescent material receives the light in the first blue-wavelength range and emits light in a green wavelength range. The second blue-light source emits light in a second blue-wavelength range whose wavelengths are longer than those in the first blue-wavelength range. An optical system guides the light emitted from the red light source, the light emitted from the second blue-light source, and the light emitted from the fluorescent material, along a unique optical path.


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