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:
Aug. 29, 2017
Filed:
Jan. 11, 2010
Applicant:
Jun Takashima, Osaka, JP;
Inventor:
Jun Takashima, Osaka, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H01L 33/00 (2010.01); H01L 29/20 (2006.01); F21K 9/00 (2016.01); F21Y 105/12 (2016.01); F21Y 105/10 (2016.01); F21Y 115/10 (2016.01); F21Y 113/13 (2016.01);
U.S. Cl.
CPC ...
F21K 9/00 (2013.01); F21Y 2105/10 (2016.08); F21Y 2105/12 (2016.08); F21Y 2113/13 (2016.08); F21Y 2115/10 (2016.08);
Abstract
An illumination device is provided with an arrangement for reducing color unevenness. A plurality of light-emitting devices are provided, each of which includes a transparent enclosure sealing a light-emitting element and further including a phosphor excited by light emitted from the light-emitting element. A substrate is provided upon which the plurality of light-emitting devices are mounted. The light-emitting devices are provided with predetermined color temperatures that vary in accordance with their position along the substrate to reduce color unevenness, for example increasing in a phased manner from the center of the substrate toward the outer circumference thereof.