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Polarizer protective film, polarizing plate comprising same, and liquid crystal display device comprising polarizing plate

A light-transparent substrate technology, applied in optical elements, polarizing elements, optics, etc., can solve the problems of reduced brightness, narrowed color reproduction area, and deterioration of color reproduction, so as to prevent the increase of haze, reduce production costs, The effect of excellent optical characteristics

Active Publication Date: 2018-03-27
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the emission spectral distribution of light sources such as cold cathode fluorescent lamps (CCFL), hot cathode fluorescent lamps (HCFL), or light emitting diodes (LEDs), in addition to the wavelength regions corresponding to RGB, there are also emission as subbands between the RGB wavelengths spectrum, which mixes with color filters, resulting in poor color reproduction
For example, the distribution characteristic of the emission spectrum of a cold cathode fluorescent lamp (CCFL) has an impure emission spectrum close to 490nm and 590nm between the dominant wavelengths of the respective RGB primary colors, therefore, the light passing through the color filter causes color mixing, resulting in a color reproduction area narrowing problem
[0006] Although attempts have been made to improve color reproduction by optimizing color filters, however, reduced brightness becomes a problem

Method used

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  • Polarizer protective film, polarizing plate comprising same, and liquid crystal display device comprising polarizing plate
  • Polarizer protective film, polarizing plate comprising same, and liquid crystal display device comprising polarizing plate
  • Polarizer protective film, polarizing plate comprising same, and liquid crystal display device comprising polarizing plate

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preparation example Construction

[0116] The laminate of the wide color gamut layer and the surface layer can be produced by coating the above-mentioned composition for forming the surface layer on a transparent film containing a dye or pigment having a maximum absorption wavelength of 580 nm to 610 nm, and curing the resultant conduct. A transparent film including a dye or a pigment having a maximum absorption wavelength of 580 nm to 610 nm can be prepared using the above-described composition for forming a wide color gamut layer. For example, the laminate can be produced using a method of coating the above composition for forming a wide color gamut layer on a release film, curing the resultant and then removing the release film, or using an extrusion method or the like. The release film may be removed after preparing the transparent film containing dye or pigment, or may be removed after forming a surface layer on the transparent film containing dye or pigment, or before bonding the laminate on the transpare...

Embodiment approach

[0155] Hereinafter, operations and effects of the present specification will be described in more detail with reference to specific examples of the present specification. However, such examples are for illustrative purposes only, and the scope of rights of the present disclosure is not limited thereby.

[0156]

Embodiment 1

[0158] (1) Preparation of composition A1 for forming a wide color gamut layer

[0159] 80g of trimethylolpropane triacrylate (TMPTA), 20g of hexafunctional urethane acrylate (product name: UA-306I), 1g of a porphyrin-based dye with a maximum absorption wavelength of 593nm, and 1g of photopolymerization An initiator (product name: Irgacure 184) and 100 g of methyl ethyl ketone (MEK) solvent were mixed to prepare composition A1.

[0160] (2) Preparation of Composition B1 for Forming Surface Layer

[0161] Composition B1 was prepared by solvent mixing 95 g of trimethylolpropane triacrylate, 5 g of a photopolymerization initiator (Irgacure 184), and 100 g of methyl ethyl ketone solvent (MEK).

[0162] (3) Preparation of wide color gamut film

[0163] Composition A1 was coated on a TAC film having a thickness of 60 μm so that the dried thickness became 3 μm. After drying the resultant at 60 for 2 minutes, use a mercury lamp at 150mJ / cm 2 The resultant was cured by irradia...

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Abstract

The present description relates to a wide color gamut reproduction film, a polarizing plate comprising same, and a liquid crystal display device. The wide color gamut reproduction film comprises: a transparent substrate, a wide color gamut reproduction layer which is provided on one side of the transparent substrate and comprises a compound, having a photocurable functional group, and a dye or a pigment having the maximum absorption wavelength from 580 nm to 610 nm; a transparent substrate; and a surface layer which is provided on the wide color gamut reproduction layer, wherein the transparent substrate, wide color gamut reproduction layer and surface layer are sequentially laminated.

Description

technical field [0001] This disclosure claims priority and benefit from Korean Patent Application No. 10-2015-0130368 filed with the Korean Intellectual Property Office on Sep. 15, 2015, the entire contents of which are incorporated herein by reference. [0002] This specification relates to a wide color gamut film, a polarizing plate including the same, and a liquid crystal display device including the polarizing plate. Background technique [0003] Liquid crystal display (LCD) devices are currently one of the most widely used flat panel displays. Generally, a liquid crystal display device has a structure in which a liquid crystal layer is sealed between a thin film transistor (TFT) array substrate and a color filter substrate. When an electric field is applied to the electrodes existing on the array substrate and the color filter substrate, the alignment of liquid crystal molecules of the liquid crystal layer sealed therebetween is changed, and an image is displayed using...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B5/22G02B1/14G02B1/04
CPCG02B1/04G02F1/133606G02F1/133609G02B5/223G02B5/305G02F1/133528G02B5/30C08L33/08C08K5/0041G02B1/14G02B5/22C09K2323/031G02F1/133602
Inventor 李汉娜洪敬奇张影来
Owner LG CHEM LTD
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