BACKLIGHT UNIT AND DISPLAY DEVICE INCLUDING THE SAME

• US 20170160464A1
• Filed: 11/28/2016
• Published: 06/08/2017
• Est. Priority Date: 12/07/2015
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: CHOI, Hyun, KIM, HyunChul
• Granted Patent: US 10,162,102 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package

Abstract

Disclosed are a backlight unit and a display device including the same. The backlight unit includes a light guide plate, a light source unit irradiating light onto a light incident surface provided on a side surface of the light guide plate, an accommodating case including a case side wall which supports the light guide plate and surrounds a side surface of the light guide plate, and a light guide plate fixing member installed on the case side wall to prevent a movement of the light guide plate.

Claims

1. A backlight unit comprising:

a light guide plate;

a light source unit irradiating light onto a light incident surface provided on a side surface of the light guide plate;

an accommodating case including a case side wall which supports the light guide plate and surrounds a side surface of the light guide plate; and

a light guide plate fixing member installed on the case side wall to prevent a movement of the light guide plate.

2. The backlight unit of claim 1, wherein the light guide plate fixing member comprises a groove into which the case side wall is inserted.

3. The backlight unit of claim 2, wherein the light guide plate fixing member comprises a center hole through which a portion of the case side wall passes.

4. The backlight unit of claim 1, wherein the light guide plate fixing member comprises:

a first fixing part disposed between an inner surface of the case side wall and the light guide plate;

a second fixing part disposed on an outer surface of the case side wall in parallel with the first fixing part; and

a connection part disposed on the case side wall to connect the first fixing part to the second fixing part.

5. The backlight unit of claim 4, wherein the connection part comprises a center hole through which a portion of the case side wall passes.

6. The backlight unit of claim 4, further comprising:

a panel supporting part covering the connection part; and

a guide frame including a guide side wall covering the second fixing part.

7. The backlight unit of claim 4, wherein the light guide plate fixing member comprises a chamfer part provided in a corner opposite to the connection part and inclined.

8. The backlight unit of claim 1, wherein the light guide plate fixing member is installed in the accommodating case facing side surfaces other than the light incident surface among side surfaces of the light guide plate.

9. The backlight unit of claim 8, further comprising:

a corner groove provided in a corner of the accommodating case; and

a corner fixing member disposed between a corner of the light guide plate and the corner of the accommodating case.

10. A display device comprising:

the backlight unit of claim 1; and

a liquid crystal panel disposed in the backlight unit.

11. The display device of claim 10, wherein the light guide plate fixing member comprises a groove into which the case side wall is inserted.

12. The display device of claim 11, wherein the light guide plate fixing member comprises a center hole through which a portion of the case side wall passes.

13. The display device of claim 10, wherein the light guide plate fixing member comprises:

a first fixing part disposed between an inner surface of the case side wall and the light guide plate;

a second fixing part disposed on an outer surface of the case side wall in parallel with the first fixing part; and

a connection part disposed on the case side wall to connect the first fixing part to the second fixing part.

14. The display device of claim 13, wherein the connection part comprises a center hole through which a portion of the case side wall passes.

15. The display device of claim 13, further comprising:

a panel supporting part covering the connection part; and

a guide frame including a guide side wall covering the second fixing part.

16. The display device of claim 13, wherein the light guide plate fixing member comprises a chamfer part provided in a corner opposite to the connection part and inclined.

17. The display device of claim 10, wherein the light guide plate fixing member is installed in the accommodating case facing side surfaces other than the light incident surface among side surfaces of the light guide plate.

18. The display device of claim 17, further comprising:

a corner groove provided in a corner of the accommodating case; and

a corner fixing member disposed between a corner of the light guide plate and the corner of the accommodating case.