Polarizing laminate and image display device including the same

A technology of image display device and polarizing layer, which is applied in the direction of identification device, optics, optical elements, etc., can solve the problems of not being able to see the original image well, scattering, and inability to ensure, so as to achieve external light reflection characteristics and improve folding properties , the effect of suppressing color interference

Inactive Publication Date: 2021-10-01
DONGWOO FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned display device has the following problem: when there is external light, the external light is reflected or scattered from the image display surface of the display device, so that the original image displayed on the display device cannot be seen well
[0005] For this reason, for example, Korean Patent Laid-Open Publication No. 10-2013-0110204 discloses a polarizing plate for realizing an image with high contrast, but cannot ensure flexibility to a degree suitable for a flexible display device

Method used

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  • Polarizing laminate and image display device including the same
  • Polarizing laminate and image display device including the same
  • Polarizing laminate and image display device including the same

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0125] Pellets of ZEONOR 1420 (manufactured by Zeon Co., Ltd., Japan) as a norbornene resin were dried at 100° C. for 5 hours.

[0126] The above-mentioned pellets are fed into an extruder, melted in the extruder, then passed through a polymer tube and a polymer filter, and then extruded in sheet form from a T-die onto a casting drum and cooled to obtain a thickness A non-extensible film of 40 μm.

[0127] The above-mentioned non-stretched film was continuously supplied to a tenter, and the first stretch was performed at a feeding angle of 45°, a stretching temperature of 140°C, and a stretching ratio of 1.3 times, thereby obtaining an average angle of 45° with respect to the winding direction. The oriented first elongated film is then wound on a winding core.

[0128] The above-mentioned first elongated film was turned over, and supplied to a tenter so as to be oriented in a direction of 90° with respect to the orientation angle of the first elongated film, at a feeding angl...

preparation example 2

[0130] Pellets of ZEONOR 1420 (manufactured by Nippon Zeon Co., Ltd.), which is a norbornene resin, were dried at 100° C. for 5 hours.

[0131] The above-mentioned pellets are fed into an extruder, melted in the extruder, then passed through a polymer tube and a polymer filter, and then extruded in sheet form from a T-die onto a casting drum and cooled to obtain a thickness A non-extensible film of 13 μm. The detailed properties of the films are shown in Table 1 below.

preparation example 3

[0133] All the processes described in Preparation Example 1 were carried out in the same manner except that the elongation ratio was changed to 1.5 times. The second elongated film obtained was a diagonally elongated film with a thickness of 22 μm, the detailed properties of which are shown in Table 1 below.

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Abstract

A polarizing laminate according to an embodiments of the present invention includes a polarizer, a retardation layer disposed on one surface of the polarizer, and a protective layer disposed on the other surface of the polarizer and having a coefficient of thermal expansion of 60 [mu]m / m DEG C. or less. Thereby, flexibility and antireflection performance may be improve.

Description

technical field [0001] The present invention relates to a polarizing laminate and an image display device including the same. Background technique [0002] In recent years, with the development of the information society, demands in the display field have also appeared in various forms. For example, liquid crystal display devices, plasma display panel devices, electroluminescent display devices, organic light emitting diode display devices, etc., which have characteristics of thinning, light weight, and low power consumption, have been studied. [0003] The above-mentioned display device has a problem that when there is external light, the external light is reflected or scattered from the image display surface of the display device, so that the original image displayed on the display device cannot be seen well. Therefore, an optical film including a retardation film and a polarizer can be coupled with a display device to improve video or image quality. [0004] With the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/14G09F9/30
CPCG02B5/3083G02B1/14G09F9/301G02F1/133305G02F1/133528G02B5/3033G02B5/3025B32B7/023G02F1/13338
Inventor 金珉奭李正银
Owner DONGWOO FINE CHEM CO LTD
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