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Optical layered body

a layer body and optical technology, applied in the field of optical laminates, can solve the problems of increased cost, abnormal hue, and reduced apparatus brightness, and achieve the effects of reducing cost, reducing brightness, and satisfying hu

Inactive Publication Date: 2020-09-17
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an optical laminate that can be used in image display apparatuses. The laminate has the following features: it is bright, it has a good hue, and it reduces reflectance while being cost-effective.

Problems solved by technology

However, the use of the polarizing plate involves a problem, such as a reduction in brightness of the apparatus, an abnormal hue thereof, or an increase in cost thereof.

Method used

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Examples

Experimental program
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Effect test

example 1

(Wavelength Conversion Layer)

[0144]A commercial television (manufactured by Samsung Electronics Co., Ltd., product name: “UN65JS9000FXZA”) was dismantled to provide a wavelength conversion material in its backlight side, that is, a quantum dot sheet. The quantum dot sheet was adopted as a wavelength conversion layer (1).

(Absorption Layer)

[0145]A coloring matter-containing pressure-sensitive adhesive containing 0.3 part by weight of a radical generator (benzoyl peroxide, manufactured by Nippon Oil & Fats Co., Ltd., product name: “NYPER BMT”), 1 part by weight of an isocyanate-based cross-linking agent (manufactured by Tosoh Corporation, product name: “CORONATE L”), 0.3 part by weight of a squaraine compound represented by the following general formula (I-20), and 0.2 part by weight of a phenol-based antioxidant (manufactured by BASF Japan Ltd., product name: “IRGANOX 1010”) with respect to 100 parts by weight of an acrylic polymer obtained by copolymerizing n-butyl acrylate and a hyd...

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Abstract

Provided is an optical laminate having the following feature: when the optical laminate is used in an image display apparatus, the optical laminate can express a sufficient brightness, can express a satisfactory hue, and can achieve a cost reduction while suppressing a reflectance. The optical laminate of the present invention includes: a wavelength conversion layer; and an absorption layer arranged on one side of the wavelength conversion layer, wherein the absorption layer has an absorption peak in a wavelength band in a range of from 580 nm to 610 nm, and wherein the absorption layer contains a compound x represented by the general formula (I) or the general formula (II).

Description

TECHNICAL FIELD[0001]The present invention relates to an optical laminate.BACKGROUND ART[0002]In recent years, an image display apparatus including a light-emitting layer including a light-emitting material, such as quantum dots, has been attracting attention as an image display apparatus excellent in color reproducibility (e.g., Patent Literature 1). For example, when light enters a quantum dot film using quantum dots, the quantum dots are excited to emit fluorescence. For example, when the backlight of a blue LED is used, part of blue light is converted into red light and green light by the quantum dot film, and another part of the blue light is output as it is as blue light. As a result, white light can be achieved. Further, the use of such quantum dot film is said to be capable of achieving a color reproducibility of 100% or more in terms of NTSC ratio.[0003]Such image display apparatus as described above has a high reflectance. In view of the foregoing, a polarizing plate is ge...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G02F1/1335H01L33/50C07D403/08H10K99/00
CPCC07D403/08H01L33/50G02F1/133509G02F1/133528C07D207/44C07D209/12C07D209/44C07D209/52C07D209/60C09K11/06C09B57/007G02B5/223H10K77/00G02F1/133533G02F1/133536G02F1/133634G02F2202/28G02F1/133541G02F1/133638C09K2323/031C09K2323/03C07D207/00C07D209/00C07D403/00C09J7/385C09J7/10C09J2301/408C09J2301/302C09J11/06C09J2203/318C09J2429/008C09J2433/00C09J7/20C09J2301/312G02F1/133302G02B1/10
Inventor NAKAMURA, KOZOWANG, PENGWELCH, MICHAELZHENG, SHIJUN
Owner NITTO DENKO CORP
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