Liquid crystal display device

1. A liquid crystal display device including a pixel formed by a liquid crystal disposed between a first substrate on which a first electrode is formed and a second substrate on which a second electrode is formed, and a light source controller having a first terminal and controlling red, green, and blue lights to be sequentially transmitted through the pixel, the liquid crystal display device comprising:

a first red light emitting diode (LED) having a first terminal and a second terminal, the first terminal being coupled to the first terminal of the light source controller;

a second red LED having a first terminal coupled to the second terminal of the first red LED;

a first green LED having a first terminal coupled to the first terminal of the light source controller; and

a blue LED having a first terminal coupled to the first terminal of the light source controller,

wherein a first voltage applied by the light source controller to emit the first and second red LEDs, a second voltage applied by the light source controller to emit the first green LED, and a third voltage applied by the light source controller to emit the blue LED have almost the same or similar voltage levels.

2. The liquid crystal display device according to claim 1 , further comprising a second green LED having a first terminal coupled to the first terminal of the light source controller, and coupled to the first green LED in parallel.

3. The liquid crystal display device according to claim 2 , wherein the first terminal of the light source controller outputs a voltage applied to at least one of the LEDs.

4. The liquid crystal display device according to claim 2 , wherein the LEDs are formed in a single chip.

5. The liquid crystal display device according to claim 2 , wherein a combined luminance of the first and second red LEDs, a combined luminance of the first and second green LEDs, and luminance of the blue LED substantially correspond to each other.

6. The liquid crystal display device according to claim 2 , wherein the light source controller has second, third and fourth terminals, and the second red LED has a second terminal coupled to the second terminal of the light source controller, the first and second green LEDs have second terminals commonly coupled to the third terminal of the light source controller, and the blue LED has a second terminal coupled to the fourth terminal of the light source controller.

7. The liquid crystal display device according to claim 6 , wherein the second terminal of the light source controller selects the first and second red LEDs, the third terminal of the light source controller selects the first and second green LEDs, and the fourth terminal of the light source controller selects the blue LED.

8. The liquid crystal display device according to claim 1 , wherein the first terminal of the light source controller outputs a voltage applied to at least one of the LEDs.

9. The liquid crystal display device according to claim 1 , wherein the LEDs are formed in a single chip.

10. The liquid crystal display device according to claim 1 , wherein the first and second terminals of the LEDs are anodes and cathodes, respectively.

11. A liquid crystal display device including a pixel formed by a liquid crystal disposed between a first substrate on which a first electrode is formed and a second substrate on which a second electrode is formed, and a light source controller having first, second, third and fourth terminals, and controlling red, green, and blue lights to be sequentially transmitted through the pixel, the liquid crystal display device comprising:

a pair of red light emitting diodes (LEDs) coupled in series between the first terminal and the second terminal of the light source controller;

a green LED coupled between the first terminal and the third terminal of the light source controller; and

a blue LED coupled between the first terminal and the fourth terminal of the light source controllers,

wherein a first voltage applied by the light source controller to emit the pair of red LEDs, a second voltage applied by the light source controller to emit the green LED, and a third voltage applied by the light source controller to emit the blue LED have voltage levels that are proximate to each other.

12. The liquid crystal display device according to claim 11 further comprising another green LED coupled in parallel with the green LED between the first terminal and the third terminal of the light source controller.

13. The liquid crystal display device according to claim 12 , wherein the first terminal of the light source controller outputs same or different voltages applied to the LEDs.

14. The liquid crystal display device according to claim 12 , wherein the LEDs are formed in a single chip.

15. The liquid crystal display device according to claim 12 , wherein a combined luminance of the pair of red LEDs, a combined luminance of the green LED and the another green LED, and luminance of the blue LED are substantially the same as each other.

16. The liquid crystal display device according to claim 11 , wherein the first terminal of the light source controller outputs same or different voltages applied to the LEDs.

17. The liquid crystal display device according to claim 11 , wherein the LEDs are formed in a single chip.

18. The liquid crystal display device according to claim 11 , wherein a combined luminance of the pair of red LEDs, luminance of the green LED, and luminance of the blue LED are substantially the same as each other.