Optical film and liquid crystal display device comprising the same

1. An optical film, comprising:

a base material layer;

a first layer disposed on the base material layer and comprising a first oxide and at least one bead; and

a second layer disposed on the first layer and comprising a second oxide and a mineral pigment,

wherein an area size of the second layer is about 60% to about 95% of an area size of the first layer.

2. The optical film of claim 1 , wherein the first oxide comprises at least one material selected from a group consisting of a titanium oxide and a silicon oxide, and

wherein a content of the titanium oxide is about 15 wt % to about 25 wt %, or a diameter or width of each particle of the titanium oxide is about 0.3 μm to about 0.7 μm.

3. The optical film of claim 2 , wherein a content of the silicon oxide is about 2 wt % to about 5 wt %, or a diameter or width of each particle of the silicon oxide is about 2 μm to about 5 μm.

4. The optical film of claim 1 , wherein the at least one bead comprises a plurality of silicon beads, and

wherein a content of each of the silicon beads is about 5 wt % to about 10 wt %, or a diameter or width of each of the silicon beads is about 3 μm to about 8 μm.

5. The optical film of claim 1 , wherein the second oxide comprises a titanium oxide, and

wherein a content of the second oxide is about 40 wt % to about 50 wt %, or a diameter or width of each particle of the second oxide is about 0.3 μm to 0.7 μm.

6. The optical film of claim 1 , wherein the mineral pigment comprises a blue pigment, and

wherein a content of the mineral pigment is about 0.1 wt % to about 0.8 wt %, or a diameter or width of each particle of the mineral pigment is about 0.3 μm to about 0.8 μm.

7. The optical film of claim 1 , wherein the second layer is without any holes.

8. A liquid crystal display device, comprising:

a liquid crystal display panel;

a light source disposed on a back side of the liquid crystal display panel; and

an optical film disposed between the light source and the liquid crystal display panel,

wherein the optical panel comprises at least one optical film, the at least one optical film including:

a base material layer,

a first layer disposed on the base material layer and comprising a first oxide and at least one bead, and

a second layer disposed on the first layer and comprising a second oxide and a mineral pigment,

wherein an area size of the second layer is about 60% to about 95% of an area size of the first layer.

9. The liquid crystal display device of claim 8 , wherein the second layer, the first layer, and the base material layer are sequentially arranged along a proceeding direction of light emitted from the light source.