BACKLIGHT ASSEMBLY AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THE SAME

• US 20070297188A1
• Filed: 06/19/2007
• Published: 12/27/2007
• Est. Priority Date: 06/22/2006
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: CHU, Hong Sig
• Application Number:
  US11/765,022
• Publication Number:
  US 20070297188A1
• Time in Patent Office: Days
• US Class Current: 362/555
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64

Abstract

A backlight assembly and a liquid crystal display (“LCD”) device having the same are provided. The backlight assembly includes a light guide plate including an incident surface formed at a lateral side of the light guide plate, a light emitting diode (“LED”) positioned below the light guide plate and a reflecting plate reflecting light emitted from the LED towards the incident surface.

Claims

1. A backlight assembly, comprising:

a light guide plate including an incident surface formed at a lateral side of the light guide plate;

a light emitting diode (“

LED”

) positioned below the light guide plate; and

a reflecting plate which reflects light emitted from the LED towards the incident surface.

2. The backlight assembly of claim 1, wherein the reflecting plate comprises a groove which reflects light emitted from the LED and leads the reflected light to the incident surface.

3. The backlight assembly of claim 2, wherein the groove is a semi-pillar shaped groove.

4. The backlight assembly of claim 2, further comprising a light source substrate on which the LED is mounted, wherein the light source substrate supplies a driving signal to the LED.

5. The backlight assembly of claim 4, wherein the light source substrate is connected to the reflecting plate.

6. The backlight assembly of claim 4, wherein the light source substrate includes an LED pad supplying electric power to the LEDs connected thereto and a heat-releasing pad connected to the LED pad externally releasing heat generated in the LED.

7. The backlight assembly of claim 4, further comprising a bottom chassis accommodating the light source substrate, wherein the light source substrate is connected to the bottom chassis.

8. The backlight assembly of claim 1, wherein the incident surface of the light guide plate faces the reflecting plate.

9. The backlight assembly of claim 1, wherein a light emitting surface of the LED faces the reflecting plate.

10. A liquid crystal display device, comprising:

a liquid crystal panel displaying images;

a backlight assembly supplying light to the liquid crystal panel,

wherein the backlight assembly comprises a light guide plate including an incident surface formed at a lateral side of the light guide plate;

a light emitting diode (“

LED”

) positioned above the light guide plate; and

a reflecting plate reflecting light emitted from the LED and directing the reflected lights towards the incident surface.

11. The liquid crystal display device of claim 10, wherein the reflecting plate comprises a groove reflecting a light emitted from the LED and directing the light emitted from the light emitting diodes to the incident surface.

12. The liquid crystal device of claim 11, wherein the groove is a semi-pillar shaped groove.

13. The liquid crystal device of claim 11, further comprising a light source substrate on which the LED is mounted, wherein the light source substrate supplies a driving signal to the LED.

14. The liquid crystal display device of claim 13, further comprising a bottom chassis accommodating the light source substrate, wherein the light source substrate is connected to a bottom surface of the light guide plate.

15. The liquid crystal display device of claim 10, wherein the incident surface of the light guide plate faces the reflecting plate.

16. The liquid crystal display device of claim 10, wherein a light emitting surface of the LED faces the reflecting plate.