Diffusion plate, backlight assembly, liquid crystal display having the same and method of forming thereof
View Patent ↗A diffusion plate that is capable of improving a display quality, and a backlight assembly and a liquid crystal display (“LCD”) including the same are disclosed. The diffusion plate includes a base layer including of a first optically transparent resin and a first coating layer provided on a first surface of the base layer. The first coating layer includes a second optically transparent resin and random embossings. The first surface including the embossings has a 60° gloss of 15% or less. A method of forming a diffusion plate includes forming a base layer including a first optically transparent resin, providing random embossings on the base layer and sizing the diffusion plate to predetermined dimensions.
1. A diffusion plate comprising:
a base layer including a first optically transparent resin;
a first coating layer provided on a first surface of the base layer, the first coating layer including a second optically transparent resin and random embossings, and
a second coating layer on a second surface of the base layer, the second surface being opposite the first surface, the second coating layer having a higher gloss than the first coating layer,
wherein the first surface including the embossings has a 60° gloss of 15% or less, and
wherein a gloss difference between the first coating layer and the second coating layer is 15% or less.
2. The diffusion plate of claim 1 , wherein the second coating layer has a 60° gloss of 20% or less.
3. The diffusion plate of claim 1 , wherein both the first and the second coating layer are provided with a light diffuser and the base layer is not provided with a light diffuser.
4. A diffusion plate made of an optically transparent resin, the diffusion plate comprising:
a light diffuser; and
random embossings formed on a first surface of the light diffuser, and formed on a second surface thereof, the second surface being opposite to the first surface
wherein the second surface has a higher gloss than the first surface thereof,
wherein the first surface including the random embossings has a 60° gloss of 15% or less, and
wherein a gloss difference between the first and the second surfaces is 15% or less.
5. The diffusion plate of claim 4 , wherein the second surface including random embossings has a 60° gloss of 20% or less.
6. A backlight assembly comprising:
a diffusion plate including:
a base layer including a first optically transparent resin;
a first coating layer provided on a first surface of the base layer, the first coating layer including a second optically transparent resin and random embossings; and
a second coating layer on a second surface of the base layer, the second surface being opposite to the first surface and the second coating layer having a higher gloss than the first coating layer,
wherein the first surface has a 60° gloss of 15% or less, and a gloss difference between the first and second coating layers is 15% or less;
a plurality of lamps facing and opposite to the first coating layer and providing the diffusion plate with light; and
a support disposed between each of the plurality of lamps and supporting the plurality of lamps and the diffusion plate.
7. The backlight assembly of claim 6 , wherein the second coating layer has a 60° gloss of 20% or less.
8. The backlight assembly of claim 6 , wherein both the first and the second coating layer are provided with a light diffuser and the base layer is not provided with a light diffuser.
9. A liquid crystal display (“LCD”) comprising:
a backlight assembly comprising:
a diffusion plate including:
a base layer including a first optically transparent resin;
a first coating layer provided on a first surface of the base layer, the first coating layer including a second optically transparent resin and random embossings; and
a second coating layer on a second surface of the base layer, the second surface being opposite to the first surface and the second coating layer having a higher gloss than the first coating layer,
wherein the first surface has a 60° gloss of 15% or less, and a gloss difference between the first coating layer and the second coating layer is 15% or less,
a plurality of lamps facing and opposite to the first coating layer and providing the diffusion plate with light, and
a support disposed between each of the plurality of lamps and supporting the plurality of lamps and the diffusion plate; and
a liquid crystal panel assembly disposed on top of the backlight assembly and provided with the light from the backlight assembly to display images.
10. The LCD of claim 9 , wherein the second coating layer has a 60° gloss of 20% or less.
11. The LCD of claim 9 , wherein both the first and the second coating layer are provided with a light diffuser and the base layer is not provided with a light diffuser.
12. A method of forming a diffusion plate, the method comprising:
forming a base layer including a first optically transparent resin;
providing random embossings on the base layer; and
sizing the diffusion plate to predetermined dimensions;
wherein the providing random embossings includes:
forming random embossings on a first coating layer;
providing the first coating layer on a first surface of the base layer, the first coating layer including a second optically transparent resin;
forming random embossings on a second coating layer having a higher gloss than the first coating layer, the second coating layer having a 60° gloss of 25% or less; and
providing the second coating layer on a second surface of the base layer, the second surface being opposite to the first surface,
wherein the first surface has a 60° gloss of 15% or less, and a gloss difference between the first coating layer and the second coating layer is 15% or less.