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:
Oct. 20, 2009
Filed:
Nov. 16, 2006
Takao Endo, Tokyo, JP;
Akihisa Miyata, Tokyo, JP;
Takeshi Utakoji, Tokyo, JP;
Yuzo Nakano, Tokyo, JP;
Takao Endo, Tokyo, JP;
Akihisa Miyata, Tokyo, JP;
Takeshi Utakoji, Tokyo, JP;
Yuzo Nakano, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A transparent screen and a projection display unit capable of reducing the speckle with maintaining the brightness of the image light. A wavefront-dividing phase-modulating componentwhich divides the wavefront of the image light emitted from a Fresnel lens screenand modulates the phases of the wavefronts divided, is disposed before an optical diffusing component. Alternatively, a spatial frequency modulating component, which modulates the spatial frequency of the image light diffused by the optical diffusing component, is disposed on the light-output side (observer side) of the optical diffusing component