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Optical laminate and optical display device including the same

An optical laminate and laminate technology, applied in optics, optical elements, nonlinear optics, etc., can solve the problems of reduced screen quality of optical display devices, uneven brightness of liquid crystal panels, etc.

Pending Publication Date: 2022-03-29
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During this process, brightness unevenness (mura, chromatic aberration) occurs on the liquid crystal panel, resulting in a decrease in the screen quality of the optical display device.

Method used

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  • Optical laminate and optical display device including the same
  • Optical laminate and optical display device including the same
  • Optical laminate and optical display device including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0202] A polyvinyl alcohol film (VF-TS#4500, thickness: 45 μm, Kuraray Co., Ltd.) was uniaxially stretched in its MD at 30°C to twice its original length, stained with iodine, and dried at 60°C. stretched in an aqueous solution of boric acid to prepare a polarizer with a thickness of 17 μm.

[0203] By coating a composition for positive C layer (cellulose ester, Eastman Co., Ltd.) on the lower surface of an acryl film (acryl film, acrylic film) to a predetermined thickness (thickness at 550 nm: 40 μm, Re: 5 nm and Rth: -17 nm, TD uniaxially stretched film, Hyosung Co. Ltd.), followed by drying at 80° C. for 10 minutes, thereby forming a positive C layer on the lower surface of the acrylic film. The thickness of the positive C layer was 5 μm. The details of the laminate of the acrylic film and positive C layer are shown in Table 1.

[0204] The upper surface of the acrylic film was bonded to the lower surface (light incident surface) of the prepared polarizer. Then, by bondi...

Embodiment 2 and 3

[0206] An optical laminate was fabricated in the same manner as in Example 1, except that details of the laminate of the acrylic film and positive C layer were changed as listed in Table 1.

Embodiment 4

[0208] An optical laminate was produced in the same manner as in Example 1 except that a positive A layer was further formed on the lower surface of the positive C layer.

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Abstract

An optical laminate and an optical display device including the same. The optical laminate includes: a polarizer; and a first protective layer and a retardation layer stacked on a light incident surface of the polarizer, in which the retardation layer includes at least a positive C layer, and a laminate of the first protective layer and the retardation layer has a photoelastic coefficient of 2 * 10-13 cm2 / dyne or less and a modulus of 2,000 MPa to 4,000 MPa, as measured in an absorption axis direction of the polarizer in the optical laminate.

Description

[0001] Citations to related applications [0002] This application claims the benefit of Korean Patent Application No. 10-2020-0125260 filed with the Korean Intellectual Property Office on September 25, 2020, the entire disclosure of which is hereby incorporated by reference. technical field [0003] The present invention relates to an optical laminate (laminate, laminate) and an optical display device comprising the same. Background technique [0004] As one type of liquid crystal display, there is an in-plane switching (IPS) mode liquid crystal display. In an IPS mode liquid crystal display, uniformly aligned nematic liquid crystals without an applied electric field are driven by applying a lateral (lateral, lateral) electric field to display images. The IPS mode liquid crystal display has the advantage of a wider viewing angle than liquid crystal displays of other driving modes. [0005] Due to the inclination of the liquid crystal, the IPS mode liquid crystal display h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/14
CPCG02B5/3041G02B5/3083G02B1/14G02F1/133634G02F1/134363G02B5/3033G02B1/04B32B7/023C09D101/10C09D125/06G02F1/13363H10K59/50G02F2413/13
Inventor 辛承美李范德李星勋郑善暻曹芽罗洪完泽
Owner SAMSUNG SDI CO LTD