Display device
A display device includes a display panel which includes a plurality of sub pixels; and an optical control film which is disposed on the display panel and includes a convex pattern layer including a plurality of convex portions and a low refractive layer planarizing an upper surface of the convex pattern layer and having a refractive index lower than that of the convex pattern layer, and the low refractive layer includes a matrix polymerized with a polymer containing fluorinated urethane (meth)acrylate and polysilsesquioxane compounds and a monomer containing alkyl (meth)acrylate and fluorinated (meth)acrylate; and fluorine-modified inorganic particles dispersed in the matrix.
1 . A display device, comprising:
a display panel which includes a plurality of sub pixels; and
an optical control film disposed on the display panel and including a convex pattern layer including a plurality of convex portions and a low refractive layer planarizing an upper surface of the convex pattern layer and having a refractive index lower than that of the convex pattern layer,
wherein the low refractive layer includes a matrix polymerized with a polymer containing fluorinated urethane (meth)acrylate and a polysilsesquioxane compound and a monomer containing alkyl (meth)acrylate and fluorinated (meth)acrylate; and fluorine-modified inorganic particles dispersed in the matrix.
2 . The display device according to claim 1 , wherein the polymer is a copolymer of the fluorinated urethane (meth)acrylate and the polysilsesquioxane compound.
3 . The display device according to claim 1 , wherein the polysilsesquioxane compound is polyhedral oligomeric silsesquioxane.
4 . The display device according to claim 3 , wherein the polyhedral oligomeric silsesquioxane is a compound represented by the following Chemical Formula 2,
wherein R is each independently selected from a chain alkyl group having 1 to 30 carbon atoms, a branched alkyl group having 3 to 30 carbon atoms, a cycloalkyl group having 6 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, an alkyl (meth)acrylate group, a monomer containing a vinyl group, and an oligomer containing a vinyl group and in Chemical Formula 2, at least one R is alkyl (meth)acrylate group, a monomer containing a vinyl group, or an oligomer containing a vinyl group.
5 . The display device according to claim 1 , wherein the fluorinated urethane (meth)acrylate is urethane (meth)acrylate containing (per)fluoro polyester group in a molecule.
6 . The display device according to claim 5 , wherein the fluorinated urethane (meth)acrylate is a compound represented by the following Chemical Formula 1-1 or 1-2,
wherein n is an integer of 1 to 100 in each of Chemical Formulae 1-1 and 1-2.
7 . The display device according to claim 1 , wherein the alkyl (meth)acrylate is (meth)acrylate containing an alkyl group of 1 to 20 carbon atoms and the fluorinated (meth)acrylate is (meth)acrylate containing (per)fluoroalkyl group.
8 . The display device according to claim 7 , wherein the (meth)acrylate containing the (per)fluoroalkyl group is a compound represented by the following Chemical Formula 3,
wherein R is hydrogen or a methyl group, m is an integer of 1 to 20, and n is an integer of 1 to 20.
9 . The display device according to claim 1 , wherein the fluorine-modified inorganic particles have a hollow structure or a porous structure.
10 . The display device according to claim 1 , wherein the fluorine-modified inorganic particles are silica which is surface-modified with (meth)acrylate containing (per)fluoroalkyl group.
11 . The display device according to claim 10 , wherein the fluorine-modified inorganic particle includes a first surface-modified portion which is bonded onto the silica surface and includes vinyl alkoxy silane, and a second surface-modified portion which is bonded with the first surface-modified portion and includes (meth)acrylate including (per)fluoroalkyl group.
12 . The display device according to claim 11 , wherein the vinyl alkoxy silane is selected from vinyl trimethoxy silane or vinyl triethoxy silane and the (meth)acrylate containing the (per)fluoroalkyl group is a compound represented by the following Chemical Formula 3,
wherein R is hydrogen or a methyl group, m is an integer of 1 to 20, and n is an integer of 1 to 20.
13 . The display device according to claim 1 , wherein the low refractive layer is a cured product of a composition containing 30 wt % to 55 wt % of the polymer, 35 wt % to 65 wt % of the monomer, and 1 wt % to 30 wt % of the fluorine-modified inorganic particles.
14 . The display device according to claim 13 , wherein the composition is a solvent-free composition which does not include a solvent.
15 . The display device according to claim 13 , wherein the composition further includes 0.5 wt % to 5 wt % of an additive.
16 . The display device according to claim 15 , wherein the additive includes a fluoro based surfactant, a silicon based coupling agent, or both of them.
17 . The display device according to claim 13 , wherein the composition further includes 0.5 wt % to 5 wt % of an initiator.
18 . The display device according to claim 1 , wherein a refractive index of the low refractive layer is 1.45 or lower.
19 . The display device according to claim 1 , wherein the plurality of convex portions is spaced apart from each other and disposed as an island shape.
20 . The display device according to claim 1 , wherein a width of each of the plurality of convex portions is 1 μm to 30 μm, a height is 0.1 μm to 60 μm, and a distance between adjacent convex portions is 5 μm or smaller.