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Laminated polarizing plate set and ips mode liquid crystal display device comprising same

A polarizing plate and component technology, applied in optical elements, polarizing elements, optics, etc., can solve the problems of delay, brightness, changes, etc., and achieve the effects of flexible use, excellent color sense, and excellent viewing angle.

Inactive Publication Date: 2013-03-13
DONGWOO FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, although the non-stretched film facilitates the improvement of optical characteristics, there is a problem that the physical properties of the film react sensitively to physical changes in an external environment of high temperature and humidity, and there is a problem that retardation and brightness changes occur.

Method used

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  • Laminated polarizing plate set and ips mode liquid crystal display device comprising same
  • Laminated polarizing plate set and ips mode liquid crystal display device comprising same
  • Laminated polarizing plate set and ips mode liquid crystal display device comprising same

Examples

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Effect test

Embodiment 1

[0108] in such as figure 1 Lamination was performed as shown, and the actual measurement data of each optical film, liquid crystal cell, and backlight involved in the present invention were used in TECH WIZ LCD 1D (SANAYI SYSTEM, Korea). The following pairs figure 1 The structure is described in detail.

[0109] From the side of the backlight unit 40, it consists of a lower polarizer 10, an IPS mode liquid crystal cell 30, and an upper polarizer 20, wherein the IPS mode liquid crystal cell 30 is the right side of the visible side in a state where no voltage is applied. The IPS mode liquid crystal cell 30 in which the liquid crystal alignment direction is 90° when the counterclockwise rotation is taken as the positive (+) direction based on the lateral horizontal direction. In the lower polarizing plate 10, a positive A plate 14, a polarizer 11, and a protective film 13 are laminated from the liquid crystal cell side. In the upper polarizing plate 20, a positive A plate 24, ...

Embodiment 2

[0130] Although configured in the same manner as in Example 1 above, the positive A plate 24 of the upper polarizing plate 20 uses an in-plane retardation value (R0) of 50 nm, a thickness direction retardation value (Rth) of 25 nm, and a refractive index ratio (NZ) is a positive A plate of 1.0.

[0131] In addition, the positive A plate 14 of the lower polarizing plate 10 uses a positive A plate with an in-plane retardation value (R0) of 80 nm, a thickness direction retardation value (Rth) of 40 nm, and a refractive index ratio (NZ) of 1.0, thereby producing IPS mode liquid crystal display device.

Embodiment 3

[0133] Although configured in the same manner as in Example 1 above, the positive A plate 24 of the upper polarizing plate 20 uses an in-plane retardation value (R0) of 80 nm, a thickness direction retardation value (Rth) of 40 nm, and a refractive index ratio (NZ) is a positive A plate of 1.0.

[0134] In addition, the positive A plate 14 of the lower polarizing plate 10 uses a positive A plate with an in-plane retardation value (R0) of 80 nm, a thickness direction retardation value (Rth) of 40 nm, and a refractive index ratio (NZ) of 1.0, thereby producing IPS mode liquid crystal display device.

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Abstract

The present invention relates to a laminated polarizing plate set and to an IPS mode liquid crystal display device comprising same. More particularly, the present invention relates to a laminated polarizing plate set comprising positive A plates arranged on an upper polarizing plate and on a lower polarizing plate, wherein each positive A plate has a front surface phase difference value (R0) of 10 to 100 nm, and a refractive index ratio (NZ) of 0.9 to 1.1, and has a slow phase axis arranged parallel to the absorption axis of a polarizer. The present invention also relates to a liquid crystal display device comprising the laminated polarizing plate and to an IPS mode liquid crystal.; The laminated polarizing plate set according to the present invention has superior physical resistance and maintains the designed phase difference compensating effects even when the plate set is exposed to a high-temperature, high-humidity environment over a long period of time, and therefore the IPS mode liquid crystal display device comprising the plate set can ensure a wide viewing angle even in a high-temperature, high-humidity environment, and improves chromatic vision at a surface thereof that is tilted.

Description

technical field [0001] The present invention relates to a coupled polarizing plate assembly which is resistant to physical changes even when exposed to a high-temperature and humid environment for a long time, and an IPS mode liquid crystal display device provided with the coupled polarizing plate assembly. Excellent, and can maintain the delay compensation effect of the original design. Background technique [0002] A liquid crystal display (LCD) is widely used as a general image display device. [0003] The modes of such liquid crystal display devices are classified according to the initial orientation of the liquid crystal, the electrode structure, and the physical properties of the liquid crystal. Currently, there are twisted nematic (TN), vertical alignment (VA), in-plane switching (IPS), and the like as modes of liquid crystal display devices that are most used. Also, it is classified as a normally black or normally white mode depending on whether or not light is tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1335
CPCG02B5/3041G02B5/3083G02F1/13363G02F1/134363
Inventor 柳眩铣金胜献李到奎
Owner DONGWOO FINE CHEM CO LTD
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