Two dimensional light source using light emitting diode and liquid crystal display device using the two dimensional light source
View Patent ↗A two-dimensional light source includes a base substrate having holes, wires disposed on a lower surface of the base substrate, a light emitting diode (LED) chip disposed on an upper surface of the base substrate, plugs that connect two electrodes of the LED chip to the wires through the holes, a buffer layer covering the LED chip, and an optical layer that is disposed on the buffer layer and has an optical pattern formed at a portion of the optical layer corresponding to the LED chip.
1. A light source comprising:
a base substrate having a flat lower surface and an upper surface;
a light emitting diode (LED) disposed on the upper surface of the base substrate, the LED having an electrode member facing the upper surface of the base substrate and aligned with a hole penetrating the base substrate for electrically connecting the electrode member to a wire member disposed on the lower surface of the base substrate;
a buffer layer covering the LED, the buffer layer having a flat surface and comprising a transparent resin; and
an optical layer disposed over the buffer layer, the optical layer including a pattern member disposed at a portion of the optical layer corresponding to the LED and having a shape for uniformly dispersing light emitted from the LED.
2. The light source of claim 1 , wherein the optical layer comprises an optical film.
3. The light source of claim 2 , wherein the pattern member comprises an embossed pattern.
4. The light source of claim 3 , further comprising a reflection layer disposed over the base substrate.
5. The light source of claim 1 , wherein the pattern member comprises an embossed pattern.
6. The light source of claim 1 , further comprising a reflection layer disposed over substantially the entire upper surface of the base substrate.
7. The light source of claim 1 , wherein the base substrate includes a printed circuit board (PCB) substrate and a heat radiating substrate disposed on the PCB substrate, the LED being disposed on the heat radiating substrate.
8. A liquid crystal display (LCD) device comprising:
a light source; and
a liquid crystal panel assembly that is provided on the light source and includes two panels and a liquid crystal layer interposed between the two panels,
wherein the light source includes:
a base substrate having a flat lower surface and an upper surface;
a light emitting diode (LED) disposed on the upper surface of the base substrate, the LED having an electrode member facing the upper surface of the base substrate and aligned with a hole penetrating the base substrate for electrically connecting the electrode member to a wire member disposed on the lower surface of the base substrate;
a buffer layer covering the LED, the buffer layer having a flat surface and comprising a transparent resin; and
an optical layer disposed over the buffer layer, the optical layer including a pattern member disposed at a portion of the optical layer corresponding to the LED and having a shape for uniformly dispersing light emitted from the LED.
9. The liquid crystal display device of claim 8 , wherein the optical layer comprises an optical film.
10. The liquid crystal display device of claim 9 , wherein the pattern member comprises an embossed pattern.
11. The liquid crystal display device of claim 10 , further comprising a reflection layer disposed over substantially the entire upper surface of the base substrate.
12. The liquid crystal display device of claim 8 , wherein the pattern member comprises an embossed pattern.
13. The liquid crystal display device of claim 8 , further comprising a reflection layer disposed over the base substrate.
14. The liquid crystal display device of claim 8 , wherein the base substrate includes a printed circuit board (PCB) substrate and a heat radiating substrate disposed on the PCB substrate, the LED being disposed on the heat radiating substrate.
15. The light source of claim 1 , wherein the buffer layer entirely covers the LED.
16. The light source of claim 1 , wherein the buffer layer directly contacts the LED.
17. The liquid crystal display device of claim 8 , wherein the buffer layer entirely covers the LED.
18. The liquid crystal display device of claim 8 , wherein the buffer layer directly contacts the LED.
19. A light source comprising:
a base substrate having a flat lower surface and an upper surface;
a light emitting diode (LED) disposed on the upper surface of the base substrate, the LED having an electrode member;
a buffer layer covering the LED, the buffer layer having a flat surface and comprising a transparent resin;
an optical layer disposed over the buffer layer, the optical layer including a pattern member disposed at a portion of the optical layer corresponding to the LED and having a shape for uniformly dispersing light emitted from the LED; and
a reflection layer disposed over substantially the entire upper surface of the base substrate.