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. 21, 2009
Filed:
Jun. 13, 2007
Applicant:
Makoto Katase, Hotaka-machi, JP;
Inventor:
Makoto Katase, Hotaka-machi, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/22 (2006.01); G03B 21/56 (2006.01); G03B 21/60 (2006.01); G02B 5/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a transmission-type screen and a projection-type display device, which are superior in contrast, a transmission-type screen characterized by including a display plane; a front side layer; and a backside layer having a light-directivity to a light projected from a direction slanted at a predetermined angle with respect to the front side layer thereof, an image being displayed on the display plane when a light is projected from a backside of the screen.