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Colour conversion film, and back light unit and display device comprising same

A color conversion and monomer technology, applied in optical components, color-changing fluorescent materials, optics, etc., can solve the problems of not preventing the heat transfer of the color conversion layer, improve the heat resistance limitation, etc., and achieve the effect of reducing deterioration and preventing absorption.

Active Publication Date: 2020-11-06
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Attempts have been made in the art to improve thermal stability by substituting functional groups of fluorescent substances, introducing resins with high heat resistance, etc., however, there is a limit to improving heat resistance because heat transfer to the color conversion layer itself is not prevented

Method used

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  • Colour conversion film, and back light unit and display device comprising same
  • Colour conversion film, and back light unit and display device comprising same
  • Colour conversion film, and back light unit and display device comprising same

Examples

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preparation example Construction

[0056] The base films of the first base film and the second base film are the same as above, and the manufacturing method according to one embodiment of the present specification may include: preparing each of the color conversion layer and the phase conversion layer by providing a separate base film , and the layer is extruded through the adhesive film. The adhesive film is used to bond the two layers, and the type is not particularly limited.

[0057] In one embodiment of the present specification, the resin includes both thermoplastic resins and heat-curable resins, and although not particularly limited in type, poly(meth)acrylic resins such as polymethylmethacrylate (PMMA)), polycarbonate (PC), polystyrene (PS), polyethylene, polyethylene glycol, polyarylene (PAR), polyurethane (TPU), styrene-propylene Nitrile (SAN), polyvinylidene fluoride (PVDF), modified polyvinylidene fluoride (modified PVDF), and the like.

[0058] In one embodiment of the present specification, the...

Embodiment 1

[0094] A green fluorescent substance and a red fluorescent substance of the following structural formula were dissolved in a xylene solvent at a molar ratio of 50:1 to prepare a first solution.

[0095]

[0096]

[0097]

[0098]

[0099] In addition, a thermoplastic resin (PMMA) was dissolved in a xylene solvent to prepare a second solution, and a phase change material (poly(ethylene glycol), PEG) was dissolved in a xylene solvent to prepare a third solution. The first solution, the second solution and the third solution are uniformly mixed, so that relative to 100 parts by weight of the thermoplastic resin, the content of the green fluorescent substance and the red fluorescent substance is 0.45 parts by weight, and the content of the phase change material is 25 parts by weight, and TiO 2 The content of the particles was 10 parts by weight. This solution was coated on a PET substrate and then dried to prepare a color conversion film. Herein, TiO may be added to an...

Embodiment 2

[0101] A color conversion film was prepared in the same manner as in Example 1, except that a phase change material (PEG) was included in 5 parts by weight relative to 100 parts by weight of the resin.

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Abstract

The present specification relates to a colour conversion film, and a back light unit and a display device comprising same.

Description

technical field [0001] This disclosure claims priority and benefit from Korean Patent Application No. 10-2018-0138411 filed with the Korean Intellectual Property Office on November 12, 2018, the entire contents of which are incorporated herein by reference. [0002] This specification relates to a color conversion film, and a backlight unit and a display device including the same. Background technique [0003] Recently, in order to improve the color gamut of LCD displays such as TVs, development of color conversion films using various materials has been conducted. [0004] Color conversion films generally have a problem of reduced durability due to accelerated deterioration due to heat, oxygen, etc., along with light. Therefore, there is a need for material selection and structural improvements that can reduce their effects. [0005] In particular, since the color conversion film is inevitably exposed to the heat of backlight or the like generated during display driving, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20G02F1/1335G02B1/10
CPCG02B5/20G02B1/10C09K11/06C09K2211/1007C09K2211/1029C09K2211/1055H01L33/507H01L33/505H01L33/501G02F1/133614G02F2201/50G02F1/1335G02B1/14G02F1/133519C09K9/02C09K2211/1433C09K2211/145G02B5/285G02B2207/113G02F1/0147G02F1/133602
Inventor 闵盛湧申东穆金娜丽金志浩吴惠美
Owner LG CHEM LTD