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:
Feb. 27, 2007
Filed:
Nov. 12, 2004
Hideto Yamashita, Suwa, JP;
Hideto Yamashita, Suwa, JP;
Seiko Epson Corporation, , JP;
Abstract
A transmissive screen is provided that controls moire pattern occurrence to prevent the degradation of image quality. The transmissive screen includes a Fresnel lens sheet having a Fresnel lens unit and a microlens array sheet having a microlens unit that are placed opposite to each other. Projected images enter from one side of the screen and are displayed on the other side of the screen, assuming that the lens pitch on one side of the microlens unit is P, the lens pitch of the Fresnel lens unit is Pf, and the pixel-frame pitch projected on the screen is Pb, the following expressions are satisfied: P≠Pb·Pf/(Pb+Pf); P≠Pb·Pf/2×(Pb+Pf); and P≠Pb·Pf/2×(Pb−Pf).