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Polarizing film group with adhesive layer, liquid crystal panel and liquid crystal display device

A technology of adhesive layer and polarizing film, applied in instruments, optics, optical components, etc., can solve the problems of uneven display and warping, and achieve the effect of stable humidity expansion coefficient, warping inhibition and small fluctuation

Active Publication Date: 2021-08-06
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the liquid crystal panel may be warped due to the shrinkage and expansion of the polarizer accompanying changes in the humidification environment.
In addition, there is also a risk of the above-mentioned warping when stored at room temperature and humidity
Warpage generated in liquid crystal panels causes display unevenness in liquid crystal display devices

Method used

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  • Polarizing film group with adhesive layer, liquid crystal panel and liquid crystal display device
  • Polarizing film group with adhesive layer, liquid crystal panel and liquid crystal display device
  • Polarizing film group with adhesive layer, liquid crystal panel and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6、 comparative example 1～5

[0140]

[0141] Take out the liquid crystal panel (70 mm in length, 130 mm in width) from the liquid crystal display device [liquid crystal panel of smartphone (screen size: 5.8 inches:)] including the liquid crystal cell in IPS mode, remove all the optical films placed on the upper and lower sides of the liquid crystal cell, The glass surfaces (front and back) of the above-mentioned liquid crystal cell were cleaned. In this way, a liquid crystal cell (70 mm in length and 130 mm in width) was prepared.

[0142]

[0143] The first adhesive layer was transferred on the first transparent protective film (b11) side of the first polarizing film to prepare a polarizing film with the first adhesive layer. In addition, the second adhesive layer was transferred to the second polarizer side of the second polarizing film, and on the other hand, the brightness improving film was bonded on the first transparent protective film (b21) side via the third adhesive layer (but , Except for Co...

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Abstract

The present invention provides a polarizing film set with an adhesive layer which is controlled so that warpage at normal temperature and normal humidity is reduced when used in a liquid crystal panel. The polarizing film set with an adhesive layer has a polarizing film with a first adhesive layer disposed on the observation side of an IPS mode liquid crystal cell and a polarizing film with a second adhesive layer disposed on the back side of the liquid crystal cell. The first polarizing film of the polarizing film with the first adhesive layer has a humidity expansion coefficient of 1.0×10 on one side of the first polarizer with a thickness of 25 μm or less. ‑6 The first transparent protective film (b11) below / % RH has a surface treatment layer on the other side, and the first transparent protective film (b11) side is arranged on the polarizing film on the side of the liquid crystal cell, and the above-mentioned second adhesive The second polarizing film of the polarizing film of the agent layer has a first transparent protective film (b21) on at least one side of the second polarizing plate with a thickness of 10 μm or less, and a brightness is attached to the side where the second adhesive layer is not provided. Raise the membrane.

Description

technical field [0001] The invention relates to a polarizing film group with an adhesive layer applied on both sides of a liquid crystal cell. Moreover, this invention relates to the liquid crystal panel which applied the said polarizing film group with an adhesive layer to both sides of a liquid crystal cell. The liquid crystal panel can form a liquid crystal display device. The above-mentioned liquid crystal panel and liquid crystal display device can be applied to various applications, for example, they can be used together with an input device such as a touch panel applied to the observation side of the liquid crystal display device. As the above-mentioned touch panel, touch panels of an optical system, an ultrasonic system, an electrostatic capacity system, a resistive film system, or the like can be suitably used. It is especially suitable for touch panels using the electrostatic capacitance method. The above-mentioned touch panel is not particularly limited, and is u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1335G02B1/14
CPCG02F1/133528G02B1/14
Inventor 品川玲子伊崎章典木村启介吉村和也
Owner NITTO DENKO CORP
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