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. 27, 2021
Filed:
Mar. 28, 2019
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventor:
Michihiro Okuda, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/20 (2005.12); G02B 27/09 (2005.12); G02B 27/14 (2005.12); G02B 5/04 (2005.12); G02B 17/04 (2005.12);
U.S. Cl.
CPC ...
G03B 21/208 (2012.12); G02B 27/0927 (2012.12); G02B 27/0961 (2012.12); G02B 27/141 (2012.12); G03B 21/204 (2012.12); G03B 21/2013 (2012.12); G02B 5/04 (2012.12); G02B 17/04 (2012.12);
Abstract
A projection image display device includes: laser diodes which emit excitation light; a top-hat diffusing element which diffuses and provides the excitation light with a top-hat intensity distribution; a phosphor which emits light when illuminated by the excitation light diffused by the top-hat diffusing element; an integrator rod which homogenizes the light emitted by the phosphor; DMDs which modulate the light homogenized by the integrator rod; and a projector which projects the light modulated by the DMDs.