Optical member, method for producing the same, adhesive optical member and image viewing display

• US 7,006,286 B2
• Filed: 02/23/2004
• Issued: 02/28/2006
• Est. Priority Date: 02/25/2003
• Status: Active Grant

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Satake, Masayuki, Ogasawara, Akiko
• Primary Examiner(s): Juba, Jr., John
• Application Number:
  US10/783,035
• Publication Number:
  US 20040212884A1
• Time in Patent Office: 736 Days
• Field of Search: 359/483, 359/485, 359/490, 359/491, 359/492, 359/513, 359/900, 349/96, 156/101, 156/107, 427/163.1, 264/1.34, 264/1.35
• US Class Current: 359/487.02
• CPC Class Codes: G02B 1/18 Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films G02B1/16 takes precedence
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements
• CPC Class Codes: Y10S 359/90 Methods

Abstract

An optical member comprising an at least one optical film, wherein an end face of the at least one optical film is covered with water-repellent materials, is useful to suppress occurrence of defects concerning the optical film, in particular, defects concerning polarizer, which are caused under an atmosphere with high temperature and high humidity.

Claims

1. An optical member comprising an at least one optical film, wherein the optical film comprises a polarizing plate and at least an end face of the polarizing plate is covered with a water-repellent material having a thickness of from 0.001 to 0.5 μ

m.

2. The optical member according to claim 1, wherein the polarizing plate includes a polarizer made of polyvinyl alcohol as a main material and at least an end face of the polarizer is covered with a water-repellent material.

3. The optical member according to claim 1, wherein the water-repellent material is of fluorine materials.

4. A method for producing the optical member according to claim 1, comprising a step of:

die-cutting an optical film with a cutting blade onto which is beforehand coated by a water-repellent material so that the water-repellent material is attached onto an end face of the optical film simultaneously with die-cutting to form a covering layer.

5. An adhesive optical member comprising an adhesive layer at least on one side of the optical member according to claim 1.

6. An image viewing display using at least one of the adhesive optical member according to claim 5.

7. An image viewing display using at least one of the optical member according to claim 1.

8. An optical film according to claim 1, wherein the thickness of the water-repellent material is from 0.001 to 0.2 μ

m.

9. An optical film according to claim 8, wherein the water-repellent material covers an end face but not main faces of the polarizing plate.

10. An optical film according to claim 1, wherein the water-repellent material covers an end face but not main faces of the polarizing plate.