Light emitting diode module and display device having the same
View Patent ↗A light emitting diode (LED) module which includes a light emitting diode which includes a light emitting chip, a first electrode and a second electrode, the first and second electrodes being electrically connected to the light emitting chip. The light-emitting diode is supported on a printed circuit board. The printed circuit board includes a base substrate of an insulating resin material, a first extension electrode that is formed on the base substrate and is connected to the first electrode, and a second extension electrode that is formed on the base substrate and is connected to the second electrode.
1. A light emitting diode (LED) module comprising:
a light emitting diode which comprises a light emitting chip;
a first electrode and a second electrode, the first and second electrodes being electrically connected to the light emitting chip; and
a printed circuit board having the light emitting diode mounted thereon, wherein the printed circuit board comprises:
an insulating base substrate;
a first extension electrode formed on the base substrate and disposed under the first electrode, the first extension electrode being connected to the first electrode; and
a second extension electrode formed on the base substrate and disposed under the second electrode, the second extension electrode being connected to the second electrode.
2. The light emitting diode module according to claim 1 , wherein the thickness of the base substrate is less than 1.2 mm.
3. The light emitting diode module according to claim 1 , wherein the first and second extension electrodes are made of a material including copper.
4. The light emitting diode module according to claim 1 , wherein an area of the first extension electrode is larger than an area of the first electrode, and an area of the second extension electrode is larger than an area of the second electrode.
5. The light emitting diode module according to claim 4 , wherein the light emitting chip is positioned closer to the first extension electrode than to the second extension electrode.
6. The light emitting diode module according to claim 5 , wherein the area of the first extension electrode is larger than the area of the second extension electrode.
7. The light emitting diode module according to claim 1 , wherein the printed circuit board further comprises at least one heat radiation hole that penetrates the base substrate, and
wherein the heat radiation hole is located in a region in which the first extension electrode is formed.
8. The light emitting diode module according to claim 7 , wherein the printed circuit board further comprises a heat radiation member that is formed in a side opposite to a side on which the first extension electrode is formed in the base substrate.
9. The light emitting diode module according to claim 8 , wherein the first extension electrode is connected to the heat radiation member through the heat radiation hole.
10. A display device comprising:
a display panel adapted to display an image; and
at least one light emitting diode module being operative to provide light to the display panel, the at least one light emitting diode module comprising:
a light emitting diode which comprises a light emitting chip;
a first electrode and a second electrode, the first and second electrodes being electrically connected to the light emitting chip; and
a printed circuit board having the light emitting diode mounted thereon, wherein the printed circuit board comprises:
an insulating base substrate;
a first extension electrode formed on the base substrate and disposed under the first electrode, the first extension electrode being connected to the first electrode; and
a second extension electrode formed on the base substrate and disposed under the second electrode, the second extension electrode being connected to the second electrode.
11. The display device according to claim 10 , wherein the thickness of the base substrate is less than 1.2 mm.
12. The display device according to claim 10 , wherein the first and second extension electrodes are made of a material including copper.
13. The display device according to claim 10 , wherein an area of the first extension electrode is larger than an area of the first electrode, and an area of the second extension electrode is larger than an area of the second electrode.
14. The display device according to claim 13 , wherein the light emitting chip is positioned closer to the first extension electrode than to the second extension electrode.
15. The display device according to claim 14 , wherein the area of the first extension electrode is larger than the area of the second extension electrode.
16. The display device according to claim 10 , wherein the at least one light emitting diode module comprises four light emitting diodes which form one group,
wherein four second extension electrodes are respectively connected to the four light emitting diodes in the one group are arranged opposite to each other, and
wherein four first extension electrodes respectively connected to the four light emitting diodes in the one group are arranged to surround the four second extension electrodes.
17. The display device according to claim 16 , wherein the printed circuit board comprises a multi-printed circuit board, and
wherein the second extension electrodes are connected to circuit wires formed on layers different from the second extension electrodes.
18. The display device according to claim 10 , wherein three light emitting diodes form one group,
wherein three first extension electrodes and three second extension electrodes respectively connected to the three light emitting diodes in the one group are arranged at positions corresponding to apexes of a triangle, and
wherein the three first extension electrodes extend outwardly from the center of the triangle.
19. The display device according to claim 18 , wherein the printed circuit board comprises a multi-layer printed circuit board, and
wherein the second extension electrodes are connected to circuit wires formed on layers different from the second extension electrodes.
20. The display device according to claim 10 , wherein the printed circuit board further comprises at least one heat radiation hole that penetrates the base substrate, and
wherein the heat radiation hole is located in a region in which the first extension electrode is formed.
21. The display device according to claim 20 , wherein the printed circuit board further comprises a heat radiation member that is formed in a side opposite to a side on which the first extension electrode is formed in the base substrate.
22. The display device according to claim 21 , wherein the first extension electrode is connected to the heat radiation member through the heat radiation hole.
23. The display device according to claim 21 , further comprising a housing member that accommodates the light emitting diode module; and
an insulating thermal-conductive member that is interposed between the housing member and the light emitting diode module.