Polarizing plate and liquid crystal display device

A technology for polarizers and liquid crystal units, applied in polarizing components, instruments, optics, etc., can solve problems such as uneven bending and uneven images, and achieve the effects of suppressing bending, improving compatibility, and improving durability

Inactive Publication Date: 2019-05-24
KONICA MINOLTA INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] On the other hand, with the thinning of liquid crystal display devices used as large televisions, if the glass substrate of the liquid crystal cell becomes thinner, the polarizing plate on the visible side relative to the liquid crystal cell is bent due to a dimensional change due to water absorption (bending deformation), Along with this, warp of the liquid crystal cell and image unevenness due to the warp (curvature unevenness) occur

Method used

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  • Polarizing plate and liquid crystal display device
  • Polarizing plate and liquid crystal display device
  • Polarizing plate and liquid crystal display device

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preparation example Construction

[0266]

[0267] In this embodiment, the 2nd protective film can be manufactured using the solution (dope) which melt|dissolved cellulose acylate in the organic solvent by the solution casting film-forming method.

[0268] The organic solvent contains solvents selected from ethers with 3 to 12 carbon atoms, ketones with 3 to 12 carbon atoms, esters with 3 to 12 carbon atoms, and halogenated hydrocarbons with 1 to 6 carbon atoms. Ethers, ketones and esters can have a cyclic structure. A compound having two or more functional groups of ether, ketone, and ester (ie, -O-, -CO-, and -COO-) can also be used as an organic solvent. The organic solvent may have other functional groups such as alcoholic hydroxyl groups. In the case of an organic solvent having two or more functional groups, the number of carbon atoms may be within the prescribed range for compounds having any one of the functional groups.

[0269] Examples of ethers having 3 to 12 carbon atoms include diisopropyl eth...

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Abstract

This polarizing plate (5) is constituted by layering a first protective film (optical film (12)), a polarizer (11), and a second protective film (optical film (13)) in this order. The retardation value Ro of the second protective film in the in-plane direction and the retardation value Rt thereof in the thickness direction are within predetermined ranges. Of the first protective film and the second protective film, only the second protective film includes an ultraviolet absorbent. The second protective film includes a polyester diol in which both terminals of a main chain are hydroxyl groups.The second protective film is a laminate film including a core layer and two skin layers that include fine particles.

Description

technical field [0001] The present invention relates to a polarizing plate and an IPS (In Plane Switching) type liquid crystal display device including the polarizing plate. Background technique [0002] Conventionally, as a technique for improving display unevenness in a liquid crystal display device, there is a technique disclosed in Patent Document 1, for example. In Patent Document 1, aliphatic dicarboxylic acid and The polycondensation ester of aliphatic diol is used as a plasticizer, and the above-mentioned plasticizer is contained in an amount of 10% by mass or more relative to the polymer (preferably cellulose acylate) forming the optical film, thereby improving the above-mentioned unevenness of light . [0003] On the other hand, with the thinning of liquid crystal display devices used as large televisions, if the glass substrate of the liquid crystal cell becomes thinner, the polarizing plate on the visible side relative to the liquid crystal cell is bent due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30B32B7/02G02F1/1335
CPCB32B7/02G02B5/30G02F1/1335
Inventor 金子由记南條崇
Owner KONICA MINOLTA INC
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