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Wavelength conversion member, backlight unit comprising same, liquid crystal display device, and wavelength conversion member manufacturing method

A technology of wavelength conversion and wavelength conversion layer, applied in lighting devices, chemical instruments and methods, components of lighting devices, etc., can solve the problems of decreased luminous intensity and low light resistance, and achieve the effect of suppressing the decrease of luminous intensity

Active Publication Date: 2017-09-26
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] LCDs equipped with wavelength conversion components using quantum dots have the above-mentioned excellent color reproducibility, but there is a problem that when the quantum dots are photooxidized by contact with oxygen, the luminous intensity decreases (lower light resistance)

Method used

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  • Wavelength conversion member, backlight unit comprising same, liquid crystal display device, and wavelength conversion member manufacturing method
  • Wavelength conversion member, backlight unit comprising same, liquid crystal display device, and wavelength conversion member manufacturing method
  • Wavelength conversion member, backlight unit comprising same, liquid crystal display device, and wavelength conversion member manufacturing method

Examples

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preparation example Construction

[0117] The preparation method of the curable composition containing subdots is not particularly limited, and it can be carried out through the preparation steps of general polymerizable compositions. In the method containing the adhesive 40b, add Adhesive 40b is preferable since there are fewer factors that hinder the bonding between adhesive 40b and adhesive 40B contained in interlayer 12b.

[0118]

[0119] Quantum dots can include two or more quantum dots with different luminescent characteristics. In this embodiment, the quantum dots are illuminated by blue light L B Excited to emit fluorescence (red light) L R Quantum dots 30A, illuminated by blue light L B Excited to emit fluorescence (green light) L G Quantum dot 30B. And, can also contain the ultraviolet light L UV Excited to emit fluorescence (red light) L R Quantum dots 30A, by ultraviolet light L UV Excited to emit fluorescence (green light) L G Quantum dots 30B, by ultraviolet light L UV Excited to emit fl...

Embodiment 1

[0314] -Production of barrier film-

[0315] Urethane acrylate resin (TAISEI FINE CHEMICAL CO,.LTD. Acrylic8BR500), photopolymerization initiator (Chiba Chemical Co., Ltd., Irgacure184) and adhesive (adhesive 40A: methacrylic acid The mass ratio of trimethoxysilylpropyl ester and adhesive 40B: glycidyl methacrylate (hereinafter, referred to as GMA for short) is 50:50 mixture) Weigh the 94:5:1 mass ratio amount, and dissolved in methyl ethyl ketone to prepare a coating solution for forming a barrier coating layer (interlayer) with a solid content concentration of 15%. Using a die coater, this coating solution was coated on the surface of the barrier layer of the above-mentioned high barrier film in a roll-to-roll manner, and passed through a drying zone at 100° C. for 3 minutes to form a barrier coating layer ( interlayer) and then wound up to produce the barrier film 1 of Example 1. The thickness of the barrier coating layer formed on the support was 1 μm.

[0316] -Manufac...

Embodiment 2

[0319] In the coating solution for forming a barrier coating layer, the adhesive 40A was set to urethane acrylate (manufactured by Kyoeisha Chemical Co., Ltd., UA306H), and the same method as in Example 1 was used. to fabricate wavelength conversion components.

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Abstract

To provide a wavelength conversion member, a backlight unit, and a wavelength conversion member manufacturing method, the wavelength conversion member comprising a wavelength conversion layer having quantum dots, and exhibiting excellent lightfastness and high brightness durability when incorporated into a liquid crystal display device. And to provide a liquid crystal display device having excellent light fastness and long-term brightness reliability. The present invention comprises a wavelength conversion layer (30) formed by dispersing quantum dots (30A, B) in an organic matrix (30P); an interlayer (12b) provided adjacent to the wavelength conversion layer (30); and a barrier layer (12a) provided adjacent to the interlayer (12b) on the side opposite to the wavelength conversion layer (30), and having silicon nitride and / or silicon oxynitride as the main component. The organic matrix (30P) is formed by curing a curable composition containing at least an alicyclic epoxy compound. The interlayer (12b) includes a chemical structure A, which is obtained by bonding with the silicon nitride and / or silicon oxynitride, and a chemical structure B, which is obtained by bonding with the organic matrix (30P).

Description

technical field [0001] The present invention relates to a wavelength conversion member having a wavelength conversion layer including quantum dots that emit fluorescence upon irradiation with excitation light, a backlight unit and a liquid crystal display device including the wavelength conversion member. The present invention also relates to a method of manufacturing a wavelength conversion member having a wavelength conversion layer including quantum dots that fluoresce upon irradiation with excitation light. Background technique [0002] Flat panel displays such as liquid crystal display devices (hereinafter, also referred to as LCDs) are being used as image display devices that consume less power and save space, and their applications are expanding year by year. A liquid crystal display device is at least composed of a backlight and a liquid crystal cell, and usually includes backlight side polarizers, visual recognition side polarizers and other components. [0003] In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20F21V9/16G02B5/12G02F1/13357H01L33/00
CPCG02B5/12G02F2201/50G02F2202/36H01L33/50H01L33/501C09K11/02G02F1/133614
Inventor 佐竹亮加茂诚山田直良大场达也
Owner FUJIFILM CORP