Light source unit, backlight unit and liquid crystal display including the same, and method thereof
View Patent ↗A light source unit including light emitting diodes mounted on a printed circuit board by not using a soldering method but a fitting method, and a backlight unit and liquid crystal display including the light source unit. The light source unit includes light emitting diodes including lead terminals and a printed circuit board including a fitting hole. Each of the lead terminals includes a base part and a fitting part protruding from the base part. The fitting part of the light emitting diode is fitted into the fitting hole of the printed circuit board and so that the light emitting diode is mounted on the printed circuit board.
1. A light source unit comprising:
light emitting diodes including a lead terminal, the lead terminal including a base part and a fitting part protruding from the base part; and
a printed circuit board including a fitting hole,
wherein the fitting part of the lead terminal is fitted into the fitting hole of the printed circuit board and the light emitting diode is mounted on the printed circuit board, the fitting part including:
a protruding portion protruding from the base part in a first direction and is inserted into the fitting hole; and
a head portion disposed at a distal end of the protruding portion and connecting the lead terminal of the light emitting diode to the printed circuit board.
2. The light source unit of claim 1 , wherein the protruding portion includes a first body and a second body spaced apart from the first body,
a first end of the first body is connected to a first end of the head portion, and a first end of the second body is connected to second end of the head portion, and
the base part extends from a second end of the first body in a second direction, and extends from a second end of the second body in a third direction opposite to the second direction.
3. The light source unit of claim 1 , wherein the protruding portion includes:
a first body disposed on a surface of the base part; and
a second body spaced apart from the first body and disposed on the surface of the base part.
4. The light source unit of claim 3 , wherein the head portion connects a distal end of the first body and a distal end of the second body.
5. The light source unit of claim 3 , wherein the head portion includes:
a first head disposed at a distal end of the first body; and
a second head disposed at a distal end of the second body.
6. The light source unit of claim 1 , wherein the lead terminal includes a first lead terminal and a second lead terminal.
7. The light source unit of claim 6 , wherein the head portion has a shape in which a width is gradually decreased from a first end of the head portion toward a second end of the head portion.
8. The light source unit of claim 6 , wherein each of the lead terminals includes a plurality of fitting parts.
9. The light source unit of claim 6 , wherein the fitting hole of the printed circuit board includes:
a first fitting hole into which the fitting part of the first lead terminal is fitted;
a second fitting hole into which the fitting part of the second lead terminal is fitted; and
a third fitting hole through which a molding part or substrate of the light emitting diode passes.
10. The light source unit of claim 9 , wherein the printed circuit board includes circuit patterns, and
the first fitting hole and the second fitting hole are disposed in the circuit patterns.
11. The light source unit of claim 10 , wherein the circuit patterns extend into the first fitting hole and the second fitting hole.
12. A backlight unit comprising:
a light source unit including light emitting diodes and a printed circuit board in which a fitting hole is disposed, the light emitting diodes including a lead terminal, the lead terminal including a base part and a fitting part protruding from the base part, and the fitting part of the lead terminal fitted into the fitting hole of the printed circuit board and securing the light emitting diode to the printed circuit board, the fitting part including:
a protruding portion protruding from the base part in a first direction and is inserted into the fitting hole; and
a head portion disposed at a distal end of the protruding portion and connecting the lead terminal of the light emitting diode to the printed circuit board; and
a receiving member in which the light source unit is received.
13. The backlight unit of claim 12 , further comprising:
a diffusion plate disposed on the light source unit; and
a prism sheet disposed on the diffusion plate.
14. The backlight unit of claim 12 , wherein the protruding portion includes a first body and a second body spaced apart from the first body,
a first end of the first body is connected to a first end of the head portion, and a first end of the second body is connected to second end of the head portion, and
the base part extends from a second end of the first body in a second direction, and extends from a second end of the second body in a third direction opposite to the second direction.
15. The backlight unit of claim 12 , wherein the protruding portion includes:
a first body disposed on a surface of the base part; and
a second body spaced apart from the first body and disposed on the surface of the base part.
16. A liquid crystal display comprising:
a light source unit including light emitting diodes and a printed circuit board in which a fitting hole is disposed, the light emitting diodes including a lead terminal, the lead terminal including a base part and a fitting part protruding from the base part, and the fitting part of the lead terminal fitted into the fitting hole of the printed circuit board and securing the light emitting diode to the printed circuit board, the fitting part including:
a protruding portion protruding from the base part in a first direction and is inserted into the fitting hole; and
a head portion disposed at a distal end of the protruding portion and connecting the lead terminal of the light emitting diode to the printed circuit board;
a receiving member in which the light source unit is received; and
a liquid crystal panel disposed above the light source unit and displaying images.
17. The liquid crystal display of claim 16 , wherein the protruding portion includes a first body and a second body spaced apart from the first body,
a first end of the first body is connected to a first end of the head portion, and a first end of the second body is connected to second end of the head portion, and
the base part extends from a second end of the first body in a second direction, and extends from a second end of the second body in a third direction opposite to the second direction.
18. The liquid crystal display of claim 16 , wherein the protruding portion includes:
a first body disposed on a surface of the base part; and
a second body spaced apart from the first body and disposed on the surface of the base part.