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:
Apr. 12, 2016
Filed:
Sep. 14, 2012
Applicants:
William G. Reed, Seattle, WA (US);
John O. Renn, Lake Forest Park, WA (US);
Inventors:
William G. Reed, Seattle, WA (US);
John O. Renn, Lake Forest Park, WA (US);
Assignee:
EXPRESS IMAGING SYSTEMS, LLC, Seattle, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 61/40 (2006.01); H01L 33/44 (2010.01); H01L 33/50 (2010.01); G02B 5/28 (2006.01);
U.S. Cl.
CPC ...
H01L 33/44 (2013.01); H01L 33/50 (2013.01); G02B 5/286 (2013.01); G02B 5/289 (2013.01);
Abstract
The efficiency and color contrast of a lighting device may be improved by using wavelength shifting material, such as a phosphor, to absorb less desired wavelengths and transmit more desired wavelengths. A double-notch reflective filter may pass desired wavelengths such as red and green, while returning or reflecting less desired wavelengths (blue and yellow) away from an optical exit back toward wavelength shifting material and re-emitted as light of more desirable wavelengths.