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US 2019/0317255 A1Published application
Optical film and image display device including same
AssigneeLG Chem, Ltd.
InventorsJung Hyun SEO, Yeong Rae CHANG, Jin Young PARK, Han Na LEE
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Abstract
The present invention relates to an optical film including a light-transmitting substrate film such as a polyester-based substrate film and an antiglare layer, and more specifically, to an optical film capable of effectively suppressing the occurrence of interference fringes derived from the substrate film, realizing excellent antiglare properties, and having excellent scratch resistance, and excellent adhesion between the substrate film and the antiglare layer, and the like, and to an image display device including the same.
Claims20
An optical film comprising:
- a polyester-based substrate film;
- and
- an antiglare layer including a binder containing a (meth)acrylate-based crosslinked polymer, and organic fine particles of a micron (μm) scale dispersed on the binder and inorganic fine particles of a nanometer (nm) scale dispersed on the binder,
- wherein the (meth)acrylate-based crosslinked polymer is a crosslinked polymer of 0 to 20 parts by weight of a monofunctional (meth)acrylate-based compound based on 100 parts by weight of the binder, and a polyfunctional (meth)acrylate-based compound with three or more functionalities,
- wherein an absolute value of the refractive index difference between the organic fine particles and the binder is less than 0.15, and an absolute value of the refractive index difference between the inorganic fine particles and the binder is less than 0.15, and
- wherein the surface of the antiglare layer has a 20-degree gloss value of 50% to 70% and a 60-degree gloss value of 75% to 90%.
3 more elements
An optical film comprising:
- a light-transmitting substrate film;
- and
- an antiglare layer which is formed on the substrate film and includes a binder containing a (meth)acrylate-based crosslinked polymer, and one or more fine particles having a sub-micron (sub-μm) scale dispersed on the binder,
- wherein the (meth)acrylate-based crosslinked polymer is a crosslinked polymer of 0 to 20 parts by weight of a monofunctional (meth)acrylate-based compound based on 100 parts by weight of the binder, and a polyfunctional (meth)acrylate-based compound with three or more functionalities,
- wherein an absolute value of the refractive index difference between the fine particles and the binder of the antiglare layer is less than, and
- wherein the polyfunctional (meth)acrylate-based compound includes a monomolecular type (meth)acrylate-based compound with three to six functionalities and/or a polyurethane-based polymer, a poly(meth)acryl-based polymer, or a polyester-based polymer, having a (meth)acrylate-based functional group with ten or more functionalities.
3 more elements
Dependencies are inferred from the claim text.