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Polarizing film with added adhesive layer, polarizing film with added adhesive layer for in-cell liquid crystal panel, in-cell liquid crystal panel, and liquid crystal display device

A technology of adhesive layer and liquid crystal panel, which is applied in the field of liquid crystal display devices and embedded liquid crystal panels, which can solve the problems of unstable sensor electrode capacity, reduced touch panel sensitivity, and electric field disorder, and achieve good antistatic function and suppress Poor conduction and the effect of satisfying sensitivity

Pending Publication Date: 2019-11-15
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there is a conductive layer such as an antistatic layer between the above-mentioned transparent electrode pattern and the user's finger, the electric field between the drive electrode and the sensor electrode is disturbed, the capacitance of the sensor electrode becomes unstable, the sensitivity of the touch panel decreases, and malfunction occurs. s reason

Method used

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  • Polarizing film with added adhesive layer, polarizing film with added adhesive layer for in-cell liquid crystal panel, in-cell liquid crystal panel, and liquid crystal display device
  • Polarizing film with added adhesive layer, polarizing film with added adhesive layer for in-cell liquid crystal panel, in-cell liquid crystal panel, and liquid crystal display device
  • Polarizing film with added adhesive layer, polarizing film with added adhesive layer for in-cell liquid crystal panel, in-cell liquid crystal panel, and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0179] (Preparation of Acrylic Polymer)

[0180] A monomer mixture containing 99 parts of butyl acrylate (BA) and 1 part of 4-hydroxybutyl acrylate (HBA) was placed in a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen gas introduction tube, and a condenser. Further, 0.1 part of 2,2'-azobisisobutyronitrile as a polymerization initiator was added to 100 parts of the above-mentioned monomer mixture (solid content) together with 100 parts of ethyl acetate, and nitrogen gas was introduced while slowly stirring. After replacement, the temperature of the liquid in the flask was maintained at around 55° C., and a polymerization reaction was performed for 8 hours to prepare a solution of an acrylic polymer.

[0181] (Preparation of Adhesive Composition)

[0182] With respect to 100 parts of the solid content of the solution of the acrylic polymer obtained above, an ionic compound was blended in the amount (solid content, active ingredient) shown in Table 1,...

Embodiment 1～16

[0198]

[0199] On one side of the polarizing film obtained above, a tackifier layer and an adhesive layer were sequentially formed in combinations shown in Table 1 to prepare a polarizing film with an adhesive layer. In addition, in Examples 15 and 16, and the comparative example 3, the anchor layer was used.

[0200] It should be noted that in Comparative Example 1, no monomer containing polar functional groups was used in the monomer components constituting the adhesive layer. In Comparative Examples 2 to 4, when preparing the adhesive composition, instead of inorganic Anion cation salts are combined with organic cation anion salts.

[0201] The following evaluations were performed about the pressure-sensitive adhesive layer and the polarizing film with a pressure-sensitive adhesive layer obtained in the above-mentioned Examples and Comparative Examples. The evaluation results are shown in Table 2.

[0202]

[0203] (i) The surface resistance value of the tackifier la...

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Abstract

The present invention provides a polarizing film with added adhesive layer for realizing an in-cell liquid crystal panel which has excellent humidity resistance and in which the adhesion (keying) between the polarizing film and the adhesive layer is excellent, it is possible to prevent clouding attributable to the adhesive layer even in high humidity environments, and it is possible to satisfy a stable antistatic function and touch sensor sensitivity. This polarizing film with added adhesive layer is provided with an adhesive layer and a polarizing film, and is characterized in that: the adhesive layer is formed from an adhesive composition comprising an inorganic cation-anion salt and a (meth)acrylic polymer containing, as monomer units, alkyl (meth)acrylate and a polar functional group containing monomer; and the ratio (b / a) of the variation in the adhesive layer side surface resistances before and after humidification is no higher than 5.

Description

technical field [0001] The present invention relates to a polarizing film with an adhesive layer, a polarizing film with an adhesive layer for an in-cell liquid crystal panel, an in-cell liquid crystal cell in which a touch sensing function is introduced into a liquid crystal cell, and An in-cell liquid crystal panel having a polarizing film with an adhesive layer on the visible side of the in-cell liquid crystal cell. In addition, the present invention also relates to a liquid crystal display device using the above-mentioned liquid crystal panel. The liquid crystal display device with a touch sensor function using an in-cell liquid crystal panel of the present invention can be used as various input display devices such as mobile devices. Background technique [0002] A liquid crystal display device usually has a polarizing film bonded from both sides of the liquid crystal cell through an adhesive layer according to its image forming method. In addition, products in which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1333G02F1/1335G06F3/041G09F9/30
CPCG02B5/30G06F3/041G09F9/30C09J7/385C09J2203/318C09J2301/312C09J2301/408C08K5/0075G02F1/133528G02F2202/22G02F2202/28G02F1/1335C09K2323/057G02F1/13338G02F1/1339C09K2323/031
Inventor 藤田昌邦外山雄祐
Owner NITTO DENKO CORP
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