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Polarizer protective film, polarizer board and liquid display element

A polarizer and protective film technology, applied in polarizing elements, optical elements, optics, etc., can solve the problems of unreliable evaporation, lower substrate layer, low moisture permeability, etc., and achieve difficult photoelastic effect and reliable bonding process , the effect of small size change

Inactive Publication Date: 2013-08-14
KEIWA INCORPORATED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of using this method, if the water absorption of the polarizer protective film is excessively reduced, the moisture permeability will also become too small. In the case of on-chip, there is a problem that the moisture contained in the water-soluble adhesive cannot be evaporated reliably
In addition, even if the photoelastic coefficient of the base layer is only lowered, if the moisture permeability is too high, the water absorption will also increase, and there is a problem that the above-mentioned photoelastic effect will be caused by dimensional changes due to humidity.

Method used

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  • Polarizer protective film, polarizer board and liquid display element
  • Polarizer protective film, polarizer board and liquid display element
  • Polarizer protective film, polarizer board and liquid display element

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Experimental program
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Effect test

no. 1 approach

[0067] figure 1 The polarizer protective film 1 comprises: a base material layer 2, with acrylic resin as the main component; a first control layer 3, used to control moisture permeability; an easy-adhesive layer 4; and a second control layer 5, used to control moisture permeability. wetness. The polarizer protective film 1 is constituted by arranging the respective layers in the order of the second control layer 5 , the base material layer 2 , the first control layer 3 , and the easy-adhesion layer 4 into a laminate. The polarizer protective film 1 is bonded to the polarizer of the liquid crystal display element from the side of the easy-adhesive layer 4, and the polarizer protective film 1 is a protective film for improving the impact resistance and performance of the polarizer.

[0068] Substrate layer 2

[0069] An acrylic resin is used as a main component of the base material layer 2. The acrylic resin is a synthetic resin capable of maintaining high transparency requi...

Embodiment approach

[0152] In addition, various modifications and improvements can be made to the polarizing plate protective film, polarizing plate, and liquid crystal display element of the present invention in addition to the above-described aspects. For example, the thickness of the second control layer of the polarizing plate protective film may be substantially thicker than the thickness of the first control layer. Thus, by making the thickness of the second control layer substantially thicker than that of the first control layer, the polarizer protective film can be provided with a curl-preventing function against the force of curling the easy-adhesive layer side as the inside, and can Curling of the polarizer protective film as a whole is prevented. As a result, the polarizer protective film can improve dimensional stability.

[0153] The polarizer protective film may be provided on both surfaces (inner surface side and outer surface side) of the polarizer. Thereby, the dimensional stab...

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PUM

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Abstract

The object of the invention is to provide a polarizer protective film, a polarizer board and a liquid display element, which can reduce size change caused by humidity and inhibit a delay value caused thereby, and can easily and reliably stick with a polarizer through a water-soluble binder. The polarizer board and the liquid display element adopt the polarizer protective film. The polarizer protective film is stuck to the polarizer of a LCD panel, characterized in that the polarizer protective film has a base material layer that takes acrylic resin as the main component, a first control layer that is overlaid on a side of the base material for humidity controlling, a easy-sticking layer that is overlaid on a side of the first control layer, a second control layer that is overlaid on the other side of the base material for humidity controlling. The first control layer and the second control layer contain the same resin as the main component.

Description

technical field [0001] The present invention relates to a polarizer protective film, a polarizing plate including the polarizer protective film, and a liquid crystal display element including the polarizing plate. Background technique [0002] Taking advantage of the characteristics of thin, light, and low power consumption of liquid crystal display devices (LCD), liquid crystal display devices are mostly used as flat-panel displays, as information display devices for mobile phones, personal digital assistants (PDA), personal computers, and televisions. Its use is expanding year by year. [0003] Such as Figure 5 As shown, a common liquid crystal display element 41 provided in a liquid crystal display device includes: a liquid crystal cell 42, which is formed by sandwiching a liquid crystal layer 44 with two transparent medium layers 43 (such as glass); a polarizer 45, which is formed by bonding The mixture layer 48 is bonded to both surfaces of the liquid crystal cell 42 ...

Claims

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Application Information

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IPC IPC(8): G02B5/30G02F1/1335B32B7/12B32B23/08
CPCB32B27/08C08J2301/08C08L1/08G02B1/04G02B1/14G02B5/3041G02F1/133528
Inventor 长村惠弌古田旭
Owner KEIWA INCORPORATED