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:
Sep. 29, 2020
Filed:
Nov. 21, 2019
Applicant:
Sharp Kabushiki Kaisha, Osaka, JP;
Inventors:
Mattia Signoretto, Oxford, GB;
Karl Peter Welna, Oxford, GB;
Valerie Berryman-Bousquet, Oxford, GB;
Koji Takahashi, Osaka, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 9/32 (2018.01); F21V 29/87 (2015.01); F21V 7/22 (2018.01);
U.S. Cl.
CPC ...
F21V 9/32 (2018.02); F21V 7/22 (2013.01); F21V 29/87 (2015.01);
Abstract
A light source unit provides enhanced control of a colour shift of white light reflected by a retro-reflector. The light source unit includes a pump light source, which emits laser pump light, a phosphor, which converts the laser pump light into white light, a retro-reflector, which has an output aperture that allows emission of part of the white light, the retro-reflector reflecting another part of the white light back to the phosphor, and scattering particles, which are adjusted to increase a blue light ratio of the white light.