Method of producing polarizing plate with optical compensation layer and image display apparatus using polarizing plate with optical compensation layer

• US 7,764,338 B2
• Filed: 12/21/2006
• Issued: 07/27/2010
• Est. Priority Date: 02/09/2006
• Status: Active Grant

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Kitamura, Yoshitsugu, Okada, Hiroyuki
• Primary Examiner(s): Nguyen; Hoan C
• Application Number:
  US12/063,167
• Publication Number:
  US 20090257017A1
• Time in Patent Office: 1,314 Days
• Field of Search: 349117-122, 349 96-105, 349/194, 349 88- 90, 349/115
• US Class Current: 349/96
• CPC Class Codes: B29D 11/0073 Optical laminates
• CPC Class Codes: G02B 5/3016 involving passive liquid crystal elements optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001
• CPC Class Codes: G02F 1/1335 Structural association of cells with optical devices, e.g. polarisers or reflectors
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/13363 Birefringent elements, e.g. for optical compensation

Abstract

There are provided a method of producing a polarizing plate with an optical compensation layer having excellent adhesiveness between a polarizer-protective film and a polarizer without deterioration of the optical compensation layer. The method of producing a polarizing plate with an optical compensation layer includes: laminating an optical compensation layer on one side of a polarizer-protective film via a photo-curing adhesive layer; irradiating UV light toward the other side of the polarizer-protective film by a metal halide lamp or an ultrahigh pressure mercury lamp; and laminating a polarizer on the side of the polarizer-protective film on which the optical compensation layer is not formed.

Claims

1. A method of producing a polarizing plate with an optical compensation layer, comprising in the stated order:

laminating an optical compensation layer on one side of a polarizer-protective film via a photo-curing adhesive layer;

irradiating UV light toward the other side of the polarizer-protective film by a metal halide lamp or an ultrahigh pressure mercury lamp; and

laminating a polarizer on the side of the polarizer-protective film on which the optical compensation layer is not formed.

2. A method of producing a polarizing plate with an optical compensation layer according to claim 1, wherein

the optical compensation layer is formed by fixing an aligned state of a liquid crystal material.

3. A polarizing plate with an optical compensation layer, comprising in the stated order:

an optical compensation layer laminated on one side of a polarizer-protective film via a photo-curing adhesive layer, wherein the photo-curing adhesive layer is cured by UV light irradiated toward the other side of the polarizer-protective film by a metal halide lamp or an ultrahigh pressure mercury lamp; and

a polarizer laminated on the side of the polarizer-protective film on which the optical compensation layer is not formed.

4. The polarizing plate with an optical compensation layer of claim 3, wherein the optical compensation layer is formed by fixing an aligned state of a liquid crystal material.

5. An image display apparatus, comprising a polarizing plate with an optical compensation layer comprising in the stated order:

an optical compensation layer laminated on one side of a polarizer-protective film via a photo-curing adhesive layer, wherein the photo-curing adhesive layer is cured by UV light irradiated toward the other side of the polarizer-protective film by a metal halide lamp or an ultrahigh pressure mercury lamp; and

a polarizer laminated on the side of the polarizer-protective film on which the optical compensation layer is not formed.

6. The image display apparatus according to claim 5, wherein the optical compensation layer is formed by fixing an aligned state of a liquid crystal material.