Title:
位相差板の製造方法
Document Type and Number:
Japanese Patent JP5104374
Kind Code:
B2
Abstract:
A method for producing a retardation film comprising the steps of : (a) uniaxially stretching an original film for producing retardation film in one direction at either a temperature T1 or T2; and then (b) uniaxially stretching the film stretched in the step (a) in a direction perpendicular to the above-mentioned direction of stretching at a temperature T2 or T1 different from the above-mentioned temperature, in which the original film for producing retardation film has a characteristic that a phase of linearly polarized light entering vertically into the film plane and having an oscillating surface of an electric vector in an X-Z plane against linearly polarized light entering vertically into the film plane and having an oscillating surface of an electric vector in a Y-Z plane lags by uniaxially stretching in the direction of the X axis at a temperature T1, and leads by uniaxially stretching in the direction of the X axis at a temperature T2 different from the above-mentioned temperature T1, in which the X axis is an uniaxially stretching direction, the Y axis is a direction perpendicular to the uniaxially stretching direction in the film plane, and the Z axis is a direction of a thickness of the film.
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Inventors:
Taku Hatano
Application Number:
JP2008033782A
Publication Date:
December 19, 2012
Filing Date:
February 14, 2008
Export Citation:
Assignee:
Zeon Corporation
International Classes:
G02B5/30; B29C55/14; B32B7/023; G02F1/13363; B29K25/00; B29K69/00; B29L7/00; B29L9/00; B29L11/00
Domestic Patent References:
| JP2002156525A | ||||
| JP2003090912A | ||||
| JP2005241965A | ||||
| JP4311903A |
Foreign References:
| WO2005050330A1 | ||||
| US20060040106 |
Attorney, Agent or Firm:
Tadayuki Kikuma