Title:
POLARIZING PLATE AND LIQUID CRYSTAL PANEL
Document Type and Number:
Japanese Patent JP2017102425
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a polarizing plate that suppresses decrease in a polarization degree due to a displacement of an absorption axis of a polarizing film caused by dimensional changes of a stretched optical film when the polarizing plate is subjected to a heat resistance test.SOLUTION: The polarizing plate includes, in the following order, a stretched optical film, a first protective film, a polarizing film, and an adhesive layer, in which an angle formed by an absorption axis of the polarizing film and a slow axis of the optical film is about 45° or about 135°. The first protective film has such properties that when the first protective film is left to stand in an environment at 85°C for 100 hours, a dimensional change rate D1 in a direction at an angle of 45° with respect to the absorption axis of the polarizing film and a dimensional change rate D2 in a direction at an angle of 135° with respect to the absorption axis of the polarizing film satisfy expression (1): 1≤|D1|/|D2|≤2 when |D1|≥|D2| and expression (2): 1<|D2|/|D1|≤2 when |D1|<|D2|.SELECTED DRAWING: Figure 2
Inventors:
MATSUMOTO TOSHIKAZU
Application Number:
JP2016123297A
Publication Date:
June 08, 2017
Filing Date:
June 22, 2016
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
G02B5/30; G02F1/1335
Domestic Patent References:
| JP2013122585A | 2013-06-20 | |||
| JP2009122454A | 2009-06-04 | |||
| JP2002258052A | 2002-09-11 | |||
| JP2006241306A | 2006-09-14 | |||
| JP2013011853A | 2013-01-17 |
Foreign References:
| WO2013111670A1 | 2013-08-01 | |||
| WO2006132367A1 | 2006-12-14 | |||
| WO2015133356A1 | 2015-09-11 |
Attorney, Agent or Firm:
Toru Nakayama
Toru Sakamoto
Toru Sakamoto