Projection system including intrinsic polarizer

• US 7,717,564 B2
• Filed: 05/21/2008
• Issued: 05/18/2010
• Est. Priority Date: 12/29/2004
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Gordon, James N., Trapani, Giorgio B., Ebihara, Ikuko, Bruzzone, Charles L., Ralli, Philip J., Nagarkar, Pradnya V.
• Primary Examiner(s): Koval; Melissa J
• Application Number:
  US12/124,505
• Publication Number:
  US 20080218698A1
• Time in Patent Office: 727 Days
• Field of Search: 353/20
• US Class Current: 353/20
• CPC Class Codes: G02B 27/28 for polarising used in stereoscopes G02B30/25
• CPC Class Codes: G02B 5/305 including organic materials, e.g. polymeric layers
• CPC Class Codes: H04N 9/3167 for polarizing the light beam polarizing optical systems per se G02B27/28
• CPC Class Codes: H04N 9/3191 Testing thereof testing of displays in general G09G3/006

Abstract

A projection system includes a light source producing illumination light, an imager disposed to receive the illumination light, and a projection lens disposed to receive the illumination light from the imager. The imager includes an intrinsic polarizer. The intrinsic polarizer can be an intrinsic polarizer stack including a U.V. curable adhesive.

Claims

1. A projection system comprising:

a light source producing illumination light;

an imager disposed to receive the illumination light, the imager comprising;

an intrinsic polarizer disposed on a liquid crystal light modulator;

a pressure sensitive adhesive disposed between the intrinsic polarizer and the liquid crystal light modulator; and

a U.V. curable adhesive comprising a silane, disposed on the intrinsic polarizer;

a projection lens desposed to receive the illumination light from the imager.

2. A projection system according to claim 1, wherein the U.V. curable adhesive comprises a urethane acrylate based adhesive and the silane comprises N-beta-(aminoethyl)-gamma-aminopropyltriethoxysilane.

3. A projection system according to claim 1, further comprising an non-hydrolyzed triacetate substrate disposed on the U.V. curable adhesive.