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:
Jan. 31, 2006
Filed:
May. 03, 2005
Jiaying MA, Maplewood, MN (US);
David J. W. Aastuen, Shoreview, MN (US);
Abolghassem B. Mahmoodi, St. Paul, MN (US);
Jiaying Ma, Maplewood, MN (US);
David J. W. Aastuen, Shoreview, MN (US);
Abolghassem B. Mahmoodi, St. Paul, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
In one embodiment, a projection screen includes a diffuse reflecting polarizer that diffusively reflects light polarized in a first direction and transmits light polarized in a second direction. The projection screen may also include a second polarizer adjacent a back side of the diffuse reflecting polarizer, wherein the second polarizer is oriented to transmit light polarized in the second direction. The projection screen may appear substantially diffuse when viewed from a front side and substantially transparent when viewed from a back side.