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Retardation film, polarizing plate and display device using same

A technology of retardation film and retardation enhancer, which is applied in the fields of polarizers, display devices and retardation films, and can solve the problems of fluctuation and uneven color of liquid crystal display devices.

Active Publication Date: 2018-11-13
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the moisture permeability of the retardation film is high, the retardation value (retardation value) of the retardation film tends to fluctuate by allowing moisture to permeate inside, and as a result, there is a problem of color unevenness in the liquid crystal display device.

Method used

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  • Retardation film, polarizing plate and display device using same
  • Retardation film, polarizing plate and display device using same
  • Retardation film, polarizing plate and display device using same

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example

[0207] (Synthesis example: Synthesis example of sugar ester compound)

[0208] [chemical formula 22]

[0209]

[0210] 34.2g (0.1 mol) of sucrose, 135.6g (0.6 mol) of benzoic anhydride, and 284.8g (3.6 mol) of pyridine are charged in a four-necked flask with a stirring device, a reflux cooler, a thermometer and a nitrogen inlet pipe, while stirring While boiling nitrogen gas from a nitrogen gas introduction tube, the temperature was raised, and esterification reaction was performed at 70° C. for 5 hours.

[0211] Next, reduce the pressure in the flask to 4×10 2 Pa or below, after distilling off excess pyridine at 60° C., the inside of the flask was depressurized to 1.3×10 Pa or below, the temperature was raised to 120° C., and most of benzoic anhydride and generated benzoic acid were distilled off. Then, 1 L of toluene and 300 g of a 0.5 mass % sodium carbonate aqueous solution were added, and after stirring at 50° C. for 30 minutes, the mixture was left still, and the to...

Embodiment

[0504] Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to these. In addition, in an Example, the expression of "part" or "%" is used, and unless otherwise specified, it means "part by mass" or "% by mass".

[0505] "Retardation film production"

[0506] [Production of Retardation Film 101]

[0507]

[0508] A retardation enhancer obtained by mixing Compound 38 (nitrogen-containing compound (A)) and Compound 150 (nitrogen-containing compound (B)) at a mass ratio of 99.9:0.1 was used.

[0509]

[0510] While heating, the following components were sufficiently stirred and dissolved to prepare a main dope liquid.

[0511] Cellulosic resin C1 (diacetyl cellulose having an acetyl substitution degree of 2.41 and a weight average molecular weight (Mw) of 56,000): 100 parts by mass

[0512] Phase difference enhancer (nitrogen-containing compound (A)+nitrogen-containing compound (B)): 3 parts by mass

[0513]...

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Abstract

The present invention provides a retardation film that can maintain high retardation expressibility and suppress retardation fluctuation in a hot and humid environment, and a polarizing plate and a display device using the same. A retardation film comprising a retardation enhancing agent, Ar-, containing a nitrogen-containing compound (A) represented by the following general formula (1) and a nitrogen-containing compound (B) represented by the following general formula (2) X2‑Ar‑Y2‑Ar…nitrogen-containing compound (A) (in the general formula (1), Ar is independently a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted nitrogen-containing aromatic heterocycle, X2 and Y2 each independently represent a substituted or unsubstituted nitrogen-containing aromatic heterocycle) Ar-X3-Ar-Y3-Ar-Z3-Ar... Nitrogen-containing compound (B) (in the general formula (2), Ar respectively are independently a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted nitrogen-containing aromatic heterocycle, and X3, Y3 and Z3 each independently represent a substituted or unsubstituted nitrogen-containing aromatic heterocycle).

Description

technical field [0001] The invention relates to a retardation film, a polarizer and a display device. In more detail, it is related with the retardation film which suppressed the retardation fluctuation|variation in the heat-and-moisture environment, and the polarizing plate which provided this retardation film, and was excellent in heat-and-moisture resistance, and a display device. Background technique [0002] Liquid crystal display devices are in increasing demand for applications such as liquid crystal televisions and liquid crystal displays for notebook computers. Generally, a liquid crystal display device is composed of a liquid crystal cell formed by sandwiching a transparent electrode, a liquid crystal layer, a color filter, etc. with a glass plate, and two polarizing plates arranged on both sides thereof. A structure in which a polarizer (hereinafter, also referred to as a polarizing film) is sandwiched between a protective film (hereinafter, also referred to as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30C08K5/34C08L1/00G02F1/1335G02F1/13363
CPCB29D11/00644B29D11/00788C08K5/34C08L1/10G02B5/3033G02B5/3083G02F2201/50G02F1/133635C08L1/12C08J5/18G02F1/13363
Inventor 森井里志世良贵史高木隆裕
Owner KONICA MINOLTA INC
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