LIGHT EMITTING MODULE AND DISPLAY DEVICE HAVING THE SAME

• US 20100208491A1
• Filed: 02/04/2010
• Published: 08/19/2010
• Est. Priority Date: 02/17/2009
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: SHIN, Kyung Ho
• Granted Patent: US 8,944,667 B2
• Time in Patent Office: Days
• US Class Current: 362/606
• CPC Class Codes: G02B 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence

Abstract

A light emitting module and a display device including the light emitting module are provided. The light emitting module may include a metal plate, a board, and a plurality of light emitting diodes. The board may be attached to a side surface of the metal plate, and light emitting diodes may be arranged on the board.

Claims

1. A light emitting module, comprising:

a holder, comprising a mounting surface positioned between a first guide surface and a second guide surface, wherein the mounting surface extends in a longitudinal direction of the holder, and wherein the first and second guide surfaces are inclined with respect to the mounting surface such that the first and second guide surfaces face each other and form a receiving space with the mounting surface;

a board coupled to the mounting surface of the holder; and

a plurality of light emitting diodes (LEDs) mounted on the board, wherein the receiving space is configured to receive a light guide plate and a reflective plate therein so as to enclose the plurality of LEDs in the receiving space, and wherein the first guide surface is configured to directly contact the light guide plate.

2. The light emitting module of claim 1, wherein the second guide surface is configured to directly contact the reflective plate.

3. The light emitting module of claim 1, wherein the first and second guide surfaces of the holder guide light emitted by the plurality of light emitting diodes in a predetermined direction.

4. The light emitting module of claim 3, wherein the first and second guide surfaces of the holder have different lengths.

5. The light emitting module of claim 4, wherein the second guide surface extends further outward from the mounting surface than the first guide surface does.

6. The light emitting module of claim 1, wherein the first and second guide surfaces extend beyond an emitting end of the plurality of light emitting diodes.

7. The light emitting module of claim 1, wherein the holder is formed of stainless steel or aluminum.

8. The light emitting module of claim 1, wherein each of the plurality of light emitting diodes has a coupling surface that is coupled to the board and a light emitting surface that is opposite the coupling surface.

9. The light emitting module of claim 1, wherein the board is in direct contact with the mounting surface of the holder.

10. A display device comprising the light emitting module of claim 1.

11. A display device, comprising:

a light guide plate;

at least one light emitting module positioned at a side edge of the light guide plate, the at least one light emitting module comprising;

a holder having a mounting surface and first and second guide surfaces extending from opposite edges of the mounting surface and inclined so as to face each other, wherein the side edge of the light guide plate directly contacts the first guide surface;

a board attached to a mounting surface of the holder;

a plurality of light emitting diodes arranged on the board; and

a display panel provided on the light guide plate.

12. The display device of claim 11, wherein the first and second guide surfaces guide light emitted by the plurality of light emitting diodes to the light guide plate.

13. The display device of claim 12, wherein a length of the second guide surface of the holder is greater than a length of the first guide surface of the holder.

14. The display device of claim 11, further comprising a reflective plate positioned under the light guide plate.

15. The display device of claim 14, wherein an outer peripheral portion of the reflective plate is positioned between the light guide plate and the second guide surface of the holder and directly contacts the second guide surface.

16. The display device of claim 15, wherein an outer peripheral edge of the reflective plate is closer to the board than a corresponding outer peripheral edge of the light guide plate is.

17. The display device of claim 12, wherein the plurality of LEDs have a coupling surface coupled to the board and an emitting surface opposite the coupling surface, and wherein the first and second guide surfaces extend beyond the emitting surfaces of the LEDs.

18. The display device of claim 11, further comprising at least one optical sheet provided between the light guide plate and the display panel.

19. The display device of claim 11, wherein the at least one light emitting module comprises a first light emitting module positioned at a first side edge of the light guide plate, and a second light emitting module positioned at a second side edge of the light guide plate.

20. A light emitting module, comprising:

a plate having a first section and a second section separated by a mounting section, wherein the plate is bent at upper and lower edges of the mounting section such that the first and second sections each extend away from the mounting section in a predetermined direction, and wherein the first section is configured to directly contact a light guide plate;

a board attached to the mounting section; and

a plurality of light emitting diodes arranged on the board so as to be positioned between the first and second sections of the plate such that light emitted by the light emitting diodes is guided in the predetermined direction in which the first and second sections extend.

21. The light emitting module of claim 20, wherein the second section extends further from the mounting section than the first section does.

22. The light emitting module of claim 21, wherein a space defined by the mounting section and the first and second sections of the plate is configured to receive edge portions of a reflective plate and a light guide plate of a display device such that light emitted by the light emitting diodes also received in the space is directed to the reflective late and the light guide plate.