Backlight unit and display device including the same
A backlight unit includes: a light source which generates light; and frame members which accommodate the light source therein. The frame members include: a first frame member which is bent in at least one direction and includes a superelastic alloy; and a second frame member which overlaps an edge portion of the first frame member and includes an elastomer.
1. A backlight unit comprising:
a light source which generates light; and
frame members which accommodate the light source,
wherein
the frame members comprise:
a first frame member which is bent in a first direction; and
a second frame member which overlaps an edge portion of the first frame member,
the first frame member includes a first hole at the edge portion,
the second frame member includes a first coupling portion coupled to the first hole,
a first distance between an inner wall of the first hole and the first coupling portion in the first direction is greater than a second distance between the inner wall of the first hole and the first coupling portion in a second direction perpendicular to the first direction,
the first frame member comprises a superelastic alloy, and
the second frame member comprises an elastomer.
2. The backlight unit of claim 1 , wherein the first frame member comprises at least one selected from a shape memory alloy, an Ni—Ti alloy, an Ni—Al alloy, a Cu—Zn—Ni alloy, a Cu—Al—Ni alloy, a Cu—Al—Mn alloy, a Ti—Ni—Cu—Mo alloy, a Co—Ni—Ga: Fe alloy, an Ag—Ni alloy, an Au—Cd alloy, a Fe—Pt alloy, a Fe—Ni alloy and an In—Cd alloy.
3. The backlight unit of claim 1 , wherein the second frame member comprises at least one selected from polydimethyl siloxane, polysilicon, polyurethane, and a styrene block copolymer.
4. The backlight unit of claim 1 , wherein the first frame member further includes a second hole at the edge portion.
5. The backlight unit of claim 1 , wherein the first hole has one of a circular shape, an elliptical shape and a slot shape.
6. The backlight unit of claim 4 , wherein the second frame member further includes a second coupling portion coupled to the second hole.
7. The backlight unit of claim 6 , wherein
the first coupling portion includes a first inserting portion surrounded by the first hole, and a first fixing portion extended from the first inserting portion and disposed outside the first hole, and
the second coupling portion includes a second inserting portion surrounded by the second hole, and a second fixing portion extended from the second inserting portion and disposed outside the second hole.
8. The backlight unit of claim 7 , wherein the first and second fixing portions have one of a hook shape and a wedge shape.
9. The backlight unit of claim 7 , wherein the second hole has a same diameter as a diameter of the second inserting portion.
10. The backlight unit of claim 9 , wherein the first hole extends parallel to the first direction.
11. The backlight unit of claim 10 , wherein a distance between the light source and the second hole is less than a distance between the light source and the first hole, in the first direction.
12. The backlight unit of claim 1 , wherein the second frame member further includes a superelastic wire-shaped member disposed within the second frame member.
13. The backlight unit of claim 12 , wherein the superelastic wire-shaped member comprises at least one selected from a shape memory alloy, an Ni—Ti alloy, an Ni—Al alloy, a Cu—Zn—Ni alloy, a Cu—Al—Ni alloy, a Cu—Al—Mn alloy, a Ti—Ni—Cu—Mo alloy, a Co—Ni—Ga: Fe alloy, an Ag—Ni alloy, an Au—Cd alloy, a Fe—Pt alloy, a Fe—Ni alloy and an In—Cd alloy.
14. The backlight unit of claim 12 , wherein the superelastic wire-shaped member has a closed-loop shape.
15. A display device comprising:
a display panel which is bent in a first direction and displays an image with light;
a light source which generates and provides the light to the display panel; and
frame members which are coupled directly to each other and accommodate the display panel and the light source,
wherein the frame members coupled directly to each other comprise:
a first frame member which is bent in a same direction in which the display panel is bent and comprises a superelastic alloy, the first frame member including a penetration hole at an edge portion; and
a second frame member which overlaps the edge portion of the first frame member and comprises an elastomer, the second frame member including a coupling portion coupled to the penetration hole of the first frame member,
wherein
the second frame member which comprises the elastomer is coupled directly to the edge portion of the first frame member which comprises the superelastic alloy to accommodate the light source in the frame members, and
a first distance between an inner wall of the penetration hole of the first frame member and the coupling portion in the first direction is greater than a second distance between the inner wall of the penetration hole and the coupling portion in a second direction perpendicular to the first direction.
16. The display device of claim 15 , wherein the superelastic alloy comprises at least one selected from a shape memory alloy, an Ni—Ti alloy, an Ni—Al alloy, a Cu—Zn—Ni alloy, a Cu—Al—Ni alloy, a Cu—Al—Mn alloy, a Ti—Ni—Cu—Mo alloy, a Co—Ni—Ga: Fe alloy, an Ag—Ni alloy, an Au—Cd alloy, a Fe—Pt alloy, a Fe—Ni alloy and an In—Cd alloy.
17. The display device of claim 15 , wherein the elastomer comprises at least one selected from polydimethyl siloxane, polysilicon, polyurethane, and a styrene block copolymer.
18. The backlight unit of claim 1 , wherein
the first coupling portion of the second frame member includes a first inserting portion having a diameter which is surrounded by the first hole,
a length of the first hole is greater than the diameter of the first inserting portion in the first direction,
a width of the first hole is the same as the diameter of the first inserting portion in the second direction.
19. The backlight unit of claim 1 , further comprising at least one of a light guide plate, an optical sheet and a reflective sheet between the first and second frame members,
wherein at least one of the light guide plate, the optical sheet and the reflective sheet includes a hole coupled to the first coupling portion.
20. The backlight unit of claim 4 , wherein the first hole is greater than the second hole in the first direction.
21. The backlight unit of claim 20 , wherein a length of the first hole is greater than a length of the second hole in the first direction.
22. The backlight unit of claim 21 , wherein a width of the first hole is the same as a width of the second hole in second direction.