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Color conversion film and multicolor light-emitting device provided with the same

A technology for color conversion and light-emitting devices, which can be used in optics, organic chemistry, opto-mechanical equipment, etc., and can solve the problems of low dispersion of inorganic light-emitting materials and low color conversion efficiency.

Inactive Publication Date: 2006-08-30
MATSUSHITA TOSHIBA PICTURE DIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the above-mentioned conventional process, the color conversion efficiency decreases due to the low dispersion of the phosphor

Method used

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  • Color conversion film and multicolor light-emitting device provided with the same
  • Color conversion film and multicolor light-emitting device provided with the same
  • Color conversion film and multicolor light-emitting device provided with the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0019] The color conversion film of the present invention is formed by a color conversion material composition containing the following substances: an organic solvent (component A) having a pyrrolidone group represented by general formula (I); a resinous material of at least one of translucent monomers, oligomers, and polymers (component B); and at least one phosphor (component C).

[0020] In the color conversion film of the present invention, the matrix resin formed from the component B contains the component A solvent in which the component C phosphor is also dispersed. In general, the matrix resin must have an appropriate polarity in order for the phosphor to be dispersed therein. In this regard, in the case where the matrix resin contains an organic solvent including a pyrrolidone group as a polar group, the dispersibility of the phosphor becomes very favorable, thus enabling the color conversion efficiency of the color conversion film of the present invention to be impro...

Embodiment approach 2

[0044] The color conversion film of the present embodiment is formed from a color conversion material composition comprising a monomer having a pyrrolidone group represented by general formula (I) and a photopolymerizable ethylenically unsaturated group (component D); a resin material containing at least one substance selected from the group consisting of translucent monomers and oligomers having photopolymerizable ethylenically unsaturated groups (component E); and at least one phosphor (component C ).

[0045] In the color conversion film of the present embodiment, the phosphor is dispersed in the matrix resin formed by copolymerization of component D and component E. In Embodiment 1, component A and component B are simply mixed and not chemically combined. Consequently, since the amount of component A changes over time, the dispersion properties of the phosphor also change over time. However, according to the color conversion film of the present embodiment, the component ...

Embodiment 1

[0054] (1) Preparation of color conversion composition

[0055] A color conversion composition was obtained by mixing the following components for 20 minutes at 40°C.

[0056] (a) Component A

[0057] N-methyl-2-pyrrolidone 1g

[0058] (b) Component B

[0059] Trimethylolpropane triacrylate (manufactured by TOAGOSEI Co., Ltd, M-309) 1.3 g

[0060] Epoxy acrylate oligomer (produced by SHOWA HIGHPOLYMER Co., Ltd, lipoxy SP-2600) 3 g

[0061] (c) Component C

[0062] Coumarin 540 (manufactured by Exciton com) 24mg

[0063] (d) solvent

[0064] Propylene Glycol Monoethyl Ether Acetate 2g

[0065] (e) Other

[0066] Photopolymerization initiator IRGACURE 369 (manufactured by CIBA Specialty Chemicals) 0.1 g

[0067] (2) Preparation of color conversion film and inorganic EL

[0068] A film of the above color conversion composition having a size of 20 mm in length and 15 mm in width was formed by screen printing on a transparent glass substrate having dimensions of 50 mm in le...

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Abstract

A color conversion film of the present invention is formed of a color-conversion material composition containing: an organic solvent having a pyrrolidone group represented by the following formula (I) (component A); a resin material containing at least one of optically active or inactive translucent monomer, oligomer and polymer (component B); and at least one type of phosphor (component C). A multicolor light-emitting device of the present invention includes a light-emitting device and a translucent substrate provided thereon, in which the color conversion film is provided between the light-emitting device and the translucent substrate. Thereby, a color conversion film with an improved color-conversion efficiency and a multicolor light-emitting device provided with such a color conversion film can be provided.

Description

technical field [0001] The invention relates to a color conversion film and a multicolor light emitting device provided with the color conversion film. Background technique [0002] In recent years, with the development of information communication, electronic display devices that display information have been attracting attention. These electronic display devices include cathode ray tubes (CRTs), plasma displays (PDPs), electroluminescence displays (ELDs), liquid crystal displays (LCDs), and the like. [0003] Here, three methods are mainly analyzed as methods for realizing a full-color electronic display device. The first method is to arrange the multi-color light emitting parts respectively in the plane so that the respective color parts emit light. However, this method requires the arrangement of three light-emitting materials in a high-definition matrix, thus presenting technical difficulties for some light-emitting materials and making it more d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D207/26C08F265/00C08F2/44
CPCG03F7/0048G03F7/0007
Inventor 岛村隆之
Owner MATSUSHITA TOSHIBA PICTURE DIS