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. 08, 2013
Filed:
Oct. 20, 2010
Takao Endo, Tokyo, JP;
Yuzo Nakano, Tokyo, JP;
Takao Endo, Tokyo, JP;
Yuzo Nakano, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
The transmission type screen includes: a Fresnel lens screen (); and an image display element (), in which the Fresnel lens screen includes: a Fresnel optical element () including a prism formed on an incident surface side as seen from the emitter; and a first light diffusion unit () for diffusing an image light passing through the Fresnel optical element, and the image display element includes: a lens element () for spatially dividing the image light from the Fresnel lens screen and changing a direction of the image light; a birefringent layer () provided at a subsequent stage of the lens element, for mixing image light obtained by spatial division; and a second light diffusion unit () provided at a subsequent stage of the birefringent layer, for diffusing the image light passing through the birefringent layer.