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Method for producing wavelength conversion sheet, phosphor protective film, wavelength conversion sheet with release film, and wavelength conversion sheet

A manufacturing method and wavelength conversion technology, applied in chemical instruments and methods, optics, optical filters, etc., can solve problems such as performance degradation

Pending Publication Date: 2021-06-04
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, this phosphor may degrade in performance over a long period of time due to contact with oxygen, water vapor, etc.

Method used

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  • Method for producing wavelength conversion sheet, phosphor protective film, wavelength conversion sheet with release film, and wavelength conversion sheet
  • Method for producing wavelength conversion sheet, phosphor protective film, wavelength conversion sheet with release film, and wavelength conversion sheet
  • Method for producing wavelength conversion sheet, phosphor protective film, wavelength conversion sheet with release film, and wavelength conversion sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] Barrier films were fabricated as described below. First, silicon oxide was provided as an inorganic thin film layer by a vacuum evaporation method on one side of a PET film as a barrier film base material, and a gas barrier coating layer was further formed on the inorganic thin film layer. This gas-barrier coating layer is formed by applying a coating solution obtained by mixing tetraethoxysilane and polyvinyl alcohol at a mass ratio of 1:1 by a wet coating method, and then heating and drying at 180°C for 1 minute. of. Thus, a barrier film in which the inorganic thin film layer and the gas barrier coating layer were provided on one surface of the substrate was obtained. It should be noted that the thickness of the barrier film was 12.5 μm, the thickness of the barrier film substrate was 12 μm, the thickness of the inorganic thin film layer was 30 nm, and the thickness of the gas barrier coating layer was 0.5 μm.

[0134] Next, 100 parts by mass of acrylic polyol resin...

Embodiment 2 to 6

[0138] Phosphor protective films of Examples 2 to 6 were obtained in the same manner as in Example 1 except that the thickness of the barrier film and the thickness of the peeling film were changed to the thicknesses shown in Table 1, respectively. Here, when the thickness of the barrier film was set at 23.5 μm, the thicknesses of the inorganic thin film layer and the gas barrier coating layer did not change, and the thickness of the barrier film substrate was set at 23 μm.

Embodiment 7

[0140] Barrier films were fabricated as described below. First, silicon oxide was provided as an inorganic thin film layer by a vacuum evaporation method on one side of a PET film as a barrier film base material, and then a gas barrier coating layer was formed on the inorganic thin film layer. This gas barrier coating layer is formed by applying a coating solution obtained by mixing tetraethoxysilane and polyvinyl alcohol at a mass ratio of 1:1 by a wet coating method, followed by heating and drying at 180°C for 1 minute. . Thus, a barrier film in which the inorganic thin film layer and the gas barrier coating layer were provided on one surface of the substrate was obtained. It should be noted that the thickness of the barrier film was 12.5 μm.

[0141] Next, 100 parts by mass of an acrylic adhesive (manufactured by Cyden Chemical Co., Ltd., trade name: Cybinol OC-3405), 1 part by mass of an isocyanate curing agent ( Cyden Chemical Co., Ltd., trade name: Cybinol K-341), and...

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PUM

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Abstract

A method for producing a wavelength conversion sheet, which comprises: a bonding step wherein a multilayer film comprising a barrier film and a release film that is releasable from the multilayer film are bonded with each other, thereby obtaining a phosphor protective film; a phosphor layer formation step wherein a phosphor layer containing a phosphor is formed on the multilayer film-side surface of the phosphor protective film, thereby obtaining a wavelength conversion sheet with a release film; and a release step wherein the release film is released from the wavelength conversion sheet with a release film.

Description

technical field [0001] The present disclosure relates to a manufacturing method of a wavelength conversion sheet, a phosphor protective film, a wavelength conversion sheet with a release film, and a wavelength conversion sheet Background technique [0002] In a light emitting unit such as a backlight unit of a liquid crystal display or an electroluminescent light emitting unit, laser light generated by an LED may be incident on a phosphor to change the wavelength of the laser light. Since the color of light changes according to the wavelength, it is possible to display a colorful picture by using light that changes into various wavelengths (that is, various colors) as display light. [0003] However, this phosphor may degrade in performance over a long period of time due to contact with oxygen, water vapor, or the like. In order to prevent such performance degradation, a protective film is laminated on the phosphor layer containing phosphor or the phosphor layer is interpos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20B32B7/023B32B37/14G02B1/11G02F1/13357
CPCG02B1/11H01L33/507H01L2933/0041H01L2933/0025H01L33/44B32B2255/10B32B7/12B32B2307/748B32B2307/584B32B2255/28B32B2307/412B32B2307/54B32B2307/21B32B2457/00B32B2255/26B32B2255/20B32B2307/732B32B2307/51B32B2307/744B32B2307/75B32B27/36B32B2307/546B32B2307/41B32B2307/7244B32B2307/402B32B7/06B32B27/08B32B2250/244B32B37/0007B32B37/12G02B1/14B32B37/26B32B7/023G02B5/206G02B1/10B32B2037/268B32B37/14H01L33/502
Inventor 市场宏辉丸山敏黑川真登斋藤靖彦
Owner TOPPAN PRINTING CO LTD
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