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Polarizing plate and liquid crystal display device using the same

A technology of liquid crystal display device and polarizer, which can be used in polarizing elements, applications, household appliances, etc., and can solve the problem of limitation of brightness improvement.

Inactive Publication Date: 2010-01-06
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the improvement of the extension line of the conventional polarizing plate, there is a limit in terms of brightness improvement.

Method used

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  • Polarizing plate and liquid crystal display device using the same
  • Polarizing plate and liquid crystal display device using the same
  • Polarizing plate and liquid crystal display device using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0656] A borosilicate glass (BK-7) substrate (φ100mm) with a thickness of 500 μm is placed in an electron beam evaporation device, and the volatile source uses aluminum with a purity of 99.999%. -5Under the conditions of Pa, deposition rate of 1 nm / sec, and deposition source-substrate distance of 25 cm, electron beam deposition of aluminum was performed from the normal direction of the substrate surface to form a metal layer with a film thickness of 100 nm. Next, except that oxygen gas was introduced into the system at 0.5 sccm, aluminum was evaporated under the same conditions to produce a laminate having a black layer made of aluminum oxide with a film thickness of 100 nm on the metal layer. Also, a product in which only an aluminum layer of 100 nm was formed was produced in the same manner. Absolute reflectances Ra and Rb were measured for each of the metal layer and the black layer, and the light extinction rate L was obtained. The results are shown in Table 1.

[0657] ...

Embodiment 1-2

[0671] A resin pattern was formed on the black layer by the same method as in Example 1 except that the following mold 2 was used as a mold.

[0672] "Mould 2"

[0673] Material: Nickel

[0674] Pitch: 130nm, Convex width: 70nm, Convex height: 200nm

[0675] Cross-sectional shape of the concave part: rectangular shape.

[0676] When the shape of the base material released from the mold was observed, it was confirmed that a resin layer having a linear resin pattern having a cross-sectional shape substantially inverting the shape of the mold as follows was formed.

[0677] "Resin pattern shape on black layer"

[0678] Pitch p: 130nm, width w: 60nm, height h: 198nm

[0679] Next, samples were produced by the same method as in Example 1. The shape of the sample obtained by observation, the shape of the linear black layer and the linear metal layer is figure 2 The form shown in (a) is the dimension shown in Table 1.

[0680] Table 1 shows the obtained samples and the evalua...

Embodiment 1-3

[0682] A resin pattern was formed on the black layer by the same method as in Example 1 except that the following mold 3 was used as the mold.

[0683] "Mold 3"

[0684] Material: Nickel

[0685] Pitch: 120nm, Convex width: 65nm, Convex height: 120nm

[0686] Sectional shape of recessed part: Rectangular shape

[0687] When the shape of the base material released from the mold was observed, it was confirmed that a resin layer having a linear resin pattern having a cross-sectional shape substantially inverting the shape of the mold as follows was formed.

[0688] "Resin pattern shape on black layer"

[0689] Pitch p: 120nm, width w: 55nm, height h: 117nm

[0690] Next, samples were produced by the same method as in Example 1. The shape of the sample obtained by observation, the shape of the linear black layer and the linear metal layer are as follows: figure 2 The form shown in (a) is the dimension shown in Table 1.

[0691] Table 3 shows the obtained samples and the ev...

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Abstract

Disclosed is a polarizing plate comprising a base, a plurality of linear metal layers formed at intervals, and a plurality of linear black layers formed at intervals. This polarizing plate is able to replace at least one of two polarizing plates constituting a liquid crystal cell, and enables to attain a high-luminance sharp display. Also disclosed is a liquid crystal display device exhibiting high luminance improving effect by using such a polarizing plate.

Description

technical field [0001] The present invention relates to a so-called reflective polarizer that transmits one of mutually orthogonal polarized light components and reflects the other, and a liquid crystal display device using the polarizer. More specifically, it relates to a reflective polarizing plate that can be replaced with at least one of two polarizing plates constituting a liquid crystal cell. Background technique [0002] A liquid crystal cell mounted in a liquid crystal display device is composed of at least a liquid crystal layer and two polarizing plates (polarizing plates) arranged to sandwich the liquid crystal layer. This polarizing plate is a sheet utilizing absorption anisotropy obtained by absorbing iodine or a dye to a polymer sheet such as polyvinyl alcohol, and then stretching and orienting it. That is, the polarization characteristic is exhibited by absorbing the light of the component parallel to the absorption axis among the light incident on the polari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1335
CPCG02F2001/133548G02F1/133528B29D11/00644G02B5/3058G02F1/133548G02B5/30G02F1/1335
Inventor 青山滋高桥宏光岛津绫子高桥弘造坂本桂太郎
Owner TORAY IND INC
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