Backlight unit and liquid crystal display device having the same
A backlight unit and liquid crystal display device comprising the backlight unit is disclosed. A backlight unit comprises a light source, an optical sheet where light from the light source is incident, a frame surrounding an edge portion of the optical sheet; and at least one sheet holder disposed at a bottom part of the frame facing the optical sheet.
1. A backlight unit, comprising:
a light source;
an optical sheet to pass light from the light source;
a frame surrounding an edge portion of the optical sheet; and
at least one sheet holder coupled to the frame and in contact with a top surface of the optical sheet.
2. The backlight unit of claim 1 , wherein the sheet holder is either a bar type or a dot type.
3. The backlight unit of claim 1 , wherein the sheet holder extends from a portion of the frame that at least partially overlaps the optical sheet, the sheet holder extending in a direction toward the top surface of the optical sheet to contact the top surface of the optical sheet.
4. The backlight unit of claim 1 , wherein the sheet holder is made at least one of epoxy, polyurethane, polycarbonate, or polyacrylate.
5. The backlight unit of claim 2 , wherein a shape of the sheet holder of the dot type is at least one of a semisphere, a semiellipsoid, or a polyhedron.
6. A backlight unit of comprising:
a light source:,
an optical sheet to pass light from the light source;
a frame surrounding an edge portion of the optical sheet; and
at least one sheet holder coupled to the frame, wherein a height of the sheet holder is substantially 100 to 800 μm.
7. The backlight unit of claim 1 , wherein a height of the sheet holder is substantially constant.
8. The backlight unit of claim 7 , wherein a height of the sheet holder changes over a length of the frame.
9. A backlight unit comprising:
a light source;
an optical sheet to pass light from the light source;
a frame surrounding an edge portion of the optical sheet; and
a plurality of sheet holders coupled to the frame and facing the optical sheet,
wherein an interval between the sheet holders is substantially 0.01 to 0.1 times a length of the frame.
10. The backlight unit of claim 1 , further comprising:
a plurality of sheet holders coupled to the frame,
wherein an interval between the sheet holders is substantially constant.
11. A backlight unit comprising:
a light source;
an optical sheet to pass light from the light source;
a frame surrounding an edge portion of the optical sheet; and
a plurality of sheet holders coupled to the frame, wherein intervals between adjacent ones of the sheet holders change over a length of the frame.
12. A liquid crystal display device, comprising:
an optical sheet to pass light from the light source;
a frame surrounding an edge portion of the optical sheet;
at least one sheet holder coupled to the frame and in contact with a top surface of the optical sheet; and
a liquid crystal display panel coupled to the frame.
13. The liquid crystal display device of claim 12 , wherein the sheet holder is either a bat type or a dot type.
14. The liquid crystal display device of claim 12 , wherein the sheet holder extends from a portion of the frame that at least partially overlaps the optical sheet, the sheet holder extending in a direction toward the top surface of the optical sheet to contact the top surface of the optical sheet.
15. The liquid crystal display device of claim 12 , wherein the sheet holder is made at least one of epoxy, polyurethane, polycarbonate, or polyacrylate and is attached at the frame.
16. The liquid crystal display device of claim 13 , wherein a shape of the sheet holder of the dot type is at least one of a semisphere, a semiellipsoid, or a polyhedron.
17. A liquid crystal display device comprising:
an optical sheet to pass light from the light source;
a frame surrounding an edge portion of the optical sheet;
at least one sheet holder coupled to the frame and facing the optical sheet and
a liquid crystal display panel coupled to the frame, wherein a height of the sheet holder is substantially 100 to 800 μm.
18. The liquid crystal display device of claim 12 , wherein a height of the sheet holders is substantially constant.
19. A liquid crystal display device comprising:
an optical sheet to pass light from the light source;
a frame surrounding an edge portion of the optical sheet;
a plurality of sheet holders coupled to the frame; and
a liquid crystal display panel coupled to the frame, wherein intervals between adjacent ones of the sheet holders is substantially 0.01 to 0.1 times a length of the frame.
20. The liquid crystal display device of claim 12 , further comprising:
a plurality of sheet holders,
wherein an interval between the sheet holders is substantially constant.