Brightness-enhanced multilayer optical film with low reflectivity for display and organic light emitting diode display using the same

一种多层光学膜、低反射率的技术，应用在有机半导体器件、光学、光学元件等方向，能够解决发光元件光输出效率下降、发光元件亮度性能差等问题，达到光线输出效率高、亮度性能高的效果

Active Publication Date: 2006-08-30
CHEIL IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The light-absorbing material contained or injected in this way reduces the amount of external light entering the light-emitting element, but absorbs a part of the light generated by the light-emitting layer, and the light output efficiency of the light-emitting element decreases
As a result, the luminance performance of the light-emitting element is poor

Method used

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  • Brightness-enhanced multilayer optical film with low reflectivity for display and organic light emitting diode display using the same
  • Brightness-enhanced multilayer optical film with low reflectivity for display and organic light emitting diode display using the same
  • Brightness-enhanced multilayer optical film with low reflectivity for display and organic light emitting diode display using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] A 100 μm thick polyethylene terephthalate (PET) film was used as a transparent substrate. The coating liquid for the light diffusion layer was prepared in the following steps. First, 200 parts by weight of light-diffusing particles with an average diameter of 5 μm are sufficiently stirred and dispersed in a mixture containing 300 parts by weight of isopropanol (IPA), 300 parts by weight of methyl ethyl ketone (MEK), 200 parts by weight of toluene, and 100 parts by weight of cyclopentane. In a mixed solvent of ketone, a dispersion of light diffusing particles is obtained. 100 parts by weight (solid content) of thermosetting acrylic resin (Aekyung Chemical, Korea) was mixed with the dispersion, and then stirred for 3 hours to obtain a particle-dispersed resin solution. One hour before forming the light diffusion layer, 25 parts by weight of an isocyanate curing agent (Aekyung Chemical, Korea) was added to the resin solution to prepare a coating liquid for the light diffusion ...

Embodiment 2

[0086] A multilayer optical film was prepared in the same method as in Example 1, except that the amount of light-absorbing particles was 150 parts by weight to form a light-absorbing layer on the light-diffusing layer.

Embodiment 3

[0088] The optical film prepared in Example 1 or 2 was laminated to manufacture an OLED display in the following manner: The adhesive layer located on the opposite side of the light-absorbing layer of the optical film was attached to a 14.1-inch OLED display (Samsung Electronics, Korea) transparent substrate (indium titanium oxide ( ITO) glass) on the top. Measure the brightness of white light at 500lx.

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Abstract

Disclosed herein is a low-reflectivity, brightness-enhancing multilayer optical film for enhancing the brightness of an organic light emission diode (OLED) display and imparting anti-reflection performance to the display. The multilayer optical film comprises a transparent substrate, a light diffusion layer formed on the transparent substrate by wet coating and a light-absorbing layer formed on the light diffusion layer by wet coating wherein the substrate has a thickness of 10~300 mum, the light diffusion layer contains a resin and spherical particles, and the light-absorbing layer contains 50~500 parts by weight of core-shell structured light-absorbing particles composed of a light-absorbing agent as a material for the core and a transparent resin as a material for the shell. Further disclosed is an organic light emitting diode (OLED) display using the multilayer optical film.

Description

[0001] The priority claim of this non-provisional application under 35 U.S.C. §119(a) is Korean Patent Application No. 2005-14862, dated February 23, 2005, which is incorporated herein by reference. Technical field [0002] The present invention relates to a low-reflectivity brightness-enhanced multilayer optical film that can be applied to displays, and more particularly to a brightness-enhanced multilayer optical film, which includes a transparent substrate and a light diffuser formed on the transparent substrate by a wet coating method A layer and a light-absorbing layer formed on the light-diffusing layer by a wet coating method, wherein the substrate has a thickness of 10-300μm, the light-diffusing layer contains resin and spherical particles, and the light-absorbing layer contains 50-500 parts by weight of a core-shell structure that absorbs light Particles, the light-absorbing particles are composed of a light-absorbing agent as a core material and a transparent resin as a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B5/02G02F1/17H05B33/00
CPCH01L51/5281H01L2251/558H01L51/5284H10K2102/351H10K59/8791H10K59/8792A47G29/087E03C1/06H10K50/86H10K50/865
Inventor 林祥奎金泰炅徐辉旼宋利花
Owner CHEIL IND INC
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