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Polarizing plate and image display device including the same

A polarizer, polarizer technology, applied in optics, polarizing elements, optical elements, etc., can solve the problems of large panel warpage and light leakage, and achieve the effect of improving light leakage

Pending Publication Date: 2022-05-13
DONGWOO FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the polarizing plate has a problem in that when a large panel is applied, light leakage occurs due to a large amount of warping of the panel

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0128] Preparation Example 1: Preparation of a composition for forming an antiglare layer

[0129] Use a stirrer to mix 14% by weight of urethane acrylate (Miwon Company, SC2153), 15% by weight of pentaerythritol triacrylate (Miwon Company, M340), 1% by weight of light-transmitting particles (acrylic-styrene copolymer, refractive index 1.525, average Particle size 2μm), 67% by weight of ethyl acetate as solvent, 2.5% by weight of photoinitiator (Ciba company, I-184) and 0.5% by weight of leveling agent (BYK Chemie company, BYK3550) and use PP filter to filter to A composition for forming an antiglare layer was prepared.

preparation example 2

[0130] Preparation Example 2: Preparation of Polarizer

[0131] A transparent, unstretched polyvinyl alcohol film having a degree of saponification of 99.9% or more and a thickness of 75 μm was controlled in moisture so that the moisture content was 4%. Thereafter, after first stretching at 120° C. by a heating roll stretching method at a stretching ratio of 4.5 times, it was immersed in water (deionized water) at 50° C. for 1 minute to expand. Then, it was dipped for 1 minute in a 30° C. dyeing aqueous solution containing 5.0 mmol / L iodine and 4% by weight of potassium iodide to perform dyeing. At this time, it was stretched 0.9 times and 1.1 times in the swelling and dyeing steps, respectively. Then, crosslinking was carried out by immersing for 3 minutes in a 70° C. crosslinking aqueous solution containing 10% by weight of potassium iodide and 7% by weight of boric acid. Stretched 1.2 times during the crosslinking step. After the cross-linking is completed, the polyvinyl...

preparation example 1 to 3 and preparation comparative example 1 to 6

[0132] Preparation Examples 1 to 3 and Preparation Comparative Examples 1 to 6: Preparation of Surface Treatment Film

[0133] After coating the antiglare layer-forming composition of Preparation Example 1 on the base film to a thickness of 23 μm, the solvent was dried at 80° C. for 2 minutes. at 400mJ / cm 2 The accumulated light amount of , was irradiated with UV to dry the film to prepare an anti-glare film as a surface treatment film. As the base film, films described in Table 1 below were used.

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Abstract

The present invention provides a polarizing plate and an image display device including the same, the polarizing plate including a polarizer and a surface treatment film laminated on one surface of the polarizer, in which the surface treatment film includes a (meth) acrylic film as a base film, and the polarizing plate satisfies a specific mathematical formula. The polarizing plate according to the present invention can improve light leakage by controlling the bending characteristics of a large panel without reverse curl.

Description

technical field [0001] The present invention relates to a polarizing plate and an image display device including the polarizing plate, and more particularly, to a polarizing plate capable of improving light leakage by controlling the bending characteristics of a large panel without reverse curling, and a polarizing plate including the polarizing plate Plate image display device. Background technique [0002] Liquid crystal display devices (LCDs) are used in various applications such as notebook computers, mobile phones, and liquid crystal televisions. An LCD generally includes a liquid crystal cell containing liquid crystal, a polarizing plate, and an adhesive layer or an adhesive layer for joining them. [0003] In addition, polarizers for liquid crystal displays are generally polarizers (also referred to as "polarizer films") that absorb and align iodine-based compounds or dichroic dyes on polyvinyl alcohol (PVA) resin films aligned in predetermined directions. The polar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/14G02B1/10G02F1/1335
CPCG02B5/3083G02B1/14G02B1/10G02F1/133528G02B1/12G02B5/3033H10K59/50
Inventor 许智惠孔炳雨
Owner DONGWOO FINE CHEM CO LTD