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Color conversion film and back light unit and display apparatus comprising the same

A technology of color conversion and red light, applied in lighting and heating equipment, optical components, light guides of lighting systems, etc., to achieve the effect of enhancing the color gamut

Active Publication Date: 2016-08-10
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cadmium-based quantum dots have safety issues such as usage restrictions, and therefore, there is increasing interest in using cadmium-free quantum dots to make backlights that are relatively free of safety issues.

Method used

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  • Color conversion film and back light unit and display apparatus comprising the same
  • Color conversion film and back light unit and display apparatus comprising the same
  • Color conversion film and back light unit and display apparatus comprising the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] A first solution was prepared by dissolving CVP (first fluorescent substance having the following structural formula) and lumogen Red 305 (second fluorescent substance) in a DMF solvent at a molar ratio of 1:2.

[0093]

[0094] (First Fluorescent Substance, CVP)

[0095] A second solution was prepared by dissolving PMMA, a thermoplastic resin, in DMF solvent.

[0096]The first solution and the second solution were mixed so that the sum of the contents of the first fluorescent substance and the second fluorescent substance was 0.3 parts by weight relative to 100 parts by weight of PMMA, and were uniformly mixed. The solid content in the mixed solution was 20 wt%, and the viscosity was 200 cps. This solution was coated on a PET substrate, and the resultant was dried to prepare a color conversion film.

[0097] The luminance spectrum of the prepared color conversion film was measured using a spectroradiometer (SR series of POPCON Corporation). Specifically, the prep...

Embodiment 2

[0099] It was prepared in the same manner as in Example 1 except that the molar ratio of the first fluorescent substance and the second fluorescent substance was 1:1.

Embodiment 3 and 4 and comparative example 3 and 4

[0109] The color conversion films prepared in Examples 1 and 2 and Comparative Examples 1 and 2, the green light-emitting color conversion films comprising the following HPTS compounds, and the blue LED light source were laminated in sequential order, and after driving the liquid crystal panel, evaluation was made from the layers. The color gamut of the light emitted by the press body is shown in Table 1 below. The green light-emitting color conversion film included 0.5 parts by weight of the following HPTS compound with respect to 100 parts by weight of the thermoplastic resin PMMA.

[0110]

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Abstract

The invention described in the present specification relates to a color conversion film including a resin matrix; and an organic fluorescent substance, wherein the color conversion film has a light emission peak with FWHM of 70 nm or less when irradiating light having a light emission peak of a 450 nm wavelength, a FWHM of 40 nm or less and monomodal light emission intensity distribution, and a ratio of light emission intensity at 600 nm to light emission intensity at a maximum light emission wavelength is 1:3 or higher, a method for preparing the same, and a back light unit including the color conversion film.

Description

technical field [0001] The present application relates to a color conversion film, a backlight unit and a display device including the same. [0002] This application claims priority and benefit from Korean Patent Application No. 10-2015-0015705 filed with the Korean Intellectual Property Office on January 31, 2015, the entire contents of which are incorporated herein by reference. Background technique [0003] As large-screen TVs become more common, TVs are becoming higher definition, thinner and more functional. High-performance and high-definition OLED TVs still have price competitiveness issues, and the real market for OLED TVs has not yet started. Therefore, efforts to similarly secure the advantages of OLEDs and LCDs have been continuously conducted. [0004] As part of this effort, many quantum dot-related technologies and prototypes have recently been introduced. However, cadmium-based quantum dots have safety issues such as usage restrictions, and therefore, inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08K5/357C08K5/00C08K5/42C08K5/55C08J5/18
CPCC08J5/18C08K5/00C08K5/357C08K5/42C08K5/55C08J2333/12C08L2203/16C08L33/12F21K9/64G02B6/005G02B6/0055G02B6/0073
Inventor 申东穆安秉寅金娜丽金志浩徐周延
Owner LG CHEM LTD
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