Optical film, liquid crystal panel, and liquid crystal display apparatus

一种液晶面板、光学膜的技术，应用在光学、光学元件、非线性光学等方向，达到实现厚度的效果

Inactive Publication Date: 2006-11-01
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional liquid crystal display devices can hardly produce a colorless neutral display in all azimuthal directions

Method used

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  • Optical film, liquid crystal panel, and liquid crystal display apparatus
  • Optical film, liquid crystal panel, and liquid crystal display apparatus
  • Optical film, liquid crystal panel, and liquid crystal display apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0259] (Manufacture of the first birefringent layer)

[0260] At 150°C, a continuous norbornene-based resin film ("ZEONOR", trade name, obtained from Zeon Co., Ltd., with a thickness of 100 μm and a photoelastic coefficient of 3.10×10 -12 m 2 / N) uniaxially stretched to 1.43 times the length, thereby producing a continuous first birefringent layer. The thickness of the first birefringent layer is 80 micrometers, the in-plane retardation Δnd is 140 nanometers, and the retardation Rth in the thickness direction is 140 nanometers.

[0261] (Manufacture of TAC / polarizer / first birefringent layer laminate)

[0262] Triacetyl cellulose (TAC) (80 μm thick) and polarizers were laminated together using an adhesive.

[0263] The surface of the first birefringent layer thus obtained was subjected to an easy-adhesive treatment (silicon primer, "APZ6661", trade name, available from Dow Corning Toray Co., Ltd., thickness of the easy-adhesive layer = 50 nm), and The first birefringent lay...

Embodiment 2

[0275] (manufacturing of liquid crystal panels)

[0276] "Laminated body of TAC / polarizer / first birefringent layer" and "laminated body of second birefringent layer / TAC / polarizer / TAC" were obtained in the same manner as in Example 1, except that the The thickness in "Manufacture of the laminated body of the second birefringent layer / TAC" of 1 was changed to 2.1 micrometers, thereby obtaining a second birefringent layer having an in-plane retardation Δnd of 0 nanometers and a retardation Rth in the thickness direction of 190 nanometers. birefringent layer.

[0277] The first birefringent layer side of the "TAC / polarizer / first birefringent layer laminate" was bonded to the "second birefringent layer / TAC / polarizer" via an acrylic pressure-sensitive adhesive (20 µm in thickness). / TAC laminate" with the second birefringent layer side attached to the upper and lower sides of the liquid crystal cell so that the absorption axes of the polarizers are perpendicular to each other. A l...

Embodiment 3

[0281] (manufacturing of liquid crystal panels)

[0282] "Laminated body of TAC / polarizer / first birefringent layer" and "laminated body of second birefringent layer / TAC / polarizer / TAC" were obtained in the same manner as in Example 1, except that the The thickness in "Manufacture of the laminated body of the second birefringent layer / TAC" of 1 was changed to 2.1 micrometers, thereby obtaining a second birefringent layer having an in-plane retardation Δnd of 0 nanometers and a retardation Rth in the thickness direction of 195 nanometers. birefringent layer.

[0283] The first birefringent layer side of the "TAC / polarizer / first birefringent layer laminate" was bonded to the "second birefringent layer / TAC / polarizer" via an acrylic pressure-sensitive adhesive (20 µm in thickness). / TAC laminate" with the second birefringent layer side attached to the upper and lower sides of the liquid crystal cell so that the absorption axes of the polarizers are perpendicular to each other. A l...

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Abstract

There is provided: an optical film suitable for a liquid crystal display apparatus providing a colorless neutral display in all azimuth angle directions; a liquid crystal panel employing the optical film; and a liquid crystal display apparatus employing the liquid crystal panel. An optical film includes a transparent protective film, a polarizer, and a birefringent layer having a relationship of nx>ny=nz and positive uniaxial property, in the stated order, in which the polarizer and the birefringent layer are laminated directly through one of a pressure-sensitive adhesive and an adhesive.

Description

technical field [0001] The present invention relates to an optical film, a liquid crystal panel and a liquid crystal display device. More particularly, the present invention relates to an optical film suitable for a liquid crystal display device providing a colorless neutral display in all azimuthal directions, a liquid crystal panel using the optical film, and a liquid crystal display using the liquid crystal panel device. Background technique [0002] Figure 5A is a schematic cross-sectional view of a typical conventional liquid crystal display device, Figure 5B is a schematic cross-sectional view of a liquid crystal cell used in the liquid crystal display device. The liquid crystal display device 900 is configured with: a liquid crystal cell 910, phase difference plates 920 and 920' disposed on both sides of the liquid crystal cell 910, and polarizers 930 and 930' disposed outside the corresponding phase difference plates 920 and 920'. Generally, the polarizers 930 a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B5/30G02F1/1335
CPCG02F1/133528G02F1/133634G02F2202/28G02F1/1335
Inventor 村上奈穗吉见裕之武田健太郎木谷良幸
Owner NITTO DENKO CORP
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