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Wavelength conversion member and backlight unit provided with same, and liquid crystal display device

A technology of wavelength conversion and wavelength conversion layer, which is applied in the field of backlight unit and liquid crystal display device, can solve the problems that cannot be said to be sufficient, and achieve the effect of preventing photooxidation

Active Publication Date: 2018-01-19
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, as in Patent Document 1, by providing a barrier film on the outside of the QD layer in the wavelength conversion member, the intrusion of oxygen into the QD layer can be suppressed to a certain extent, but it cannot be said that it is sufficient.

Method used

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  • Wavelength conversion member and backlight unit provided with same, and liquid crystal display device
  • Wavelength conversion member and backlight unit provided with same, and liquid crystal display device
  • Wavelength conversion member and backlight unit provided with same, and liquid crystal display device

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no. 2 Embodiment approach to no. 9 Embodiment approach

[0126] About 2nd Embodiment - 9th Embodiment, it can manufacture by the said 1st manufacturing method and 2nd manufacturing method, and the combination of these manufacturing methods.

[0127] As described above, since the wavelength conversion member 1D-1 to the wavelength conversion member 1D-9 contain the antioxidant AO in the wavelength conversion layer 30, it is possible to effectively prevent the quantum dots 30A, Photooxidation of 30B. In addition, since the interlayer contains the antioxidant AO, the antioxidant AO slowly released from the interlayer 40 to the wavelength conversion layer 30 can continuously prevent photooxidation of the quantum dots 30A and 30B due to oxygen infiltrated over time. Furthermore, the wavelength conversion layer 30 can be produced while suppressing the amount of components with a low degree of polymerization. Therefore, the content of components with a degree of polymerization of 2 or more and 4 or less in the wavelength conversion layer 3...

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Abstract

The invention provides a wavelength conversion member having a wavelength conversion layer including quantum dots for fluorescing in response to irradiation by excitation light, wherein the intensityof light emission is not prone to decrease, and the wavelength conversion member is highly durable, and to provide a highly durable backlight unit and liquid crystal display device in which the intensity of light emission is not prone to decrease. A wavelength conversion member (1D) is provided with a wavelength conversion layer (30) including at least one type of quantum dots (30A, 30B) for beingexcited by excitation light and fluorescing, at least one interposed layer (40) formed adjacent to the wavelength conversion layer (30), and barrier layers (12, 22) formed on at least one side of thewavelength conversion layer (30), the wavelength conversion layer (30) and at least one interposed layer (40) containing at least one type of antioxidant.

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. Background technique [0002] Flat panel displays such as Liquid Crystal Displays (LCDs) are 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 recent years, for the purpose of improving the color reproducibility of LCDs, the wavelength conversion member of the backlight unit has a wavelength conversion layer including quantum dots (also called QuantumDot, QD.) as a light-emitting material, attracting att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20C09K11/08H01L33/50G02F1/13357F21Y115/10F21Y115/30
CPCC09K11/02C09K11/025G02B5/20G02B6/005G02F2202/36G02F1/133614H01L33/50C09K11/08F21K2/00C09K11/883G02B6/0055G02F1/133621
Inventor 佐竹亮大场达也伊藤英明米山博之
Owner FUJIFILM CORP
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