Backlight unit and display device including the same

Patent metadata

Field	Value
Publication number	US-10670799-B2
Application number	US-201816165454-A
Country	US
Kind code	B2
Filing date	Oct 19, 2018
Priority date	Dec 7, 2017
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A backlight unit includes a light guide plate (LGP), a housing that receives the LGP, and a first LGP guide member coupled to the housing. The housing includes a bottom surface, a first sidewall, and a second sidewall. The first and second sidewalls are connected to edges of the bottom surface, are disposed adjacent to each other, and are spaced apart from each other. A first corner of the bottom surface is disposed between the first and second sidewalls, and the first LGP guide member is disposed in a gap between the first and second sidewalls.

First claim

What is claimed is:

1. A backlight unit, comprising:
a light guide plate (LGP);
a housing that receives the LGP; and
a first LGP guide member coupled to the housing,
wherein
the housing comprises a bottom surface, a first sidewall, and a second sidewall, wherein the first and second sidewalls are connected to edges of the bottom surface,
the first and second sidewalls are disposed adjacent to each other and are spaced apart from each other, wherein a first corner of the bottom surface is disposed between the first and second sidewalls,
the first LGP guide member is disposed in a gap between the first and second sidewalls,
the LGP comprises a corner inclined surface disposed at a corner of the LGP, and
the first LGP guide member comprises a guide inclined surface, wherein the guide inclined surface of the first LGP guide member is disposed opposite to the corner inclined surface of the LGP.

2. The backlight unit of claim 1 , further comprising:
an adhesive member disposed between the guide inclined surface of the first LGP guide member and the corner inclined surface of the LGP.

3. The backlight unit of claim 1 , wherein the first LGP guide member is a mold guide.

4. The backlight unit of claim 1 , wherein the first LGP guide member comprises a material with elasticity.

5. The backlight unit of claim 4 , wherein the first LGP guide member comprises silicone or rubber.

6. The backlight unit of claim 4 , further comprising:
an adhesive member disposed between the first LGP guide member and the housing.

7. The backlight unit of claim 1 , wherein the first LGP guide member comprises an optical sheet receiving portion, wherein the optical sheet receiving portion is recessed inwardly from the guide inclined surface of the first LGP guide member.

8. The backlight unit of claim 1 , wherein the first LGP guide member comprises a protruding portion, wherein the protruding portion protrudes from the guide inclined surface of the first LGP guide member toward the LGP.

9. The backlight unit of claim 1 , wherein
the housing further comprises a third sidewall,
the third sidewall is disposed opposite to the first sidewall, the third sidewall is spaced apart from the second sidewall, and a second corner of the bottom surface is disposed between the second and third sidewalls, and
the backlight unit further comprises a second LGP guide member, wherein the second LGP guide member is disposed in a gap between the second and third sidewalls.

10. The backlight unit of claim 9 , wherein the second LGP guide member comprises a guide inclined surface, wherein the guide inclined surface of the second LGP guide member is disposed opposite to another corner inclined surface of the LGP.

11. The backlight unit of claim 10 , wherein an inclination angle of the guide inclined surface of the first LGP guide member with respect to the second sidewall is greater than an inclination angle of the guide inclined surface of the second LGP guide member with respect to the second sidewall.

12. A display device, comprising:
a backlight unit, comprising:
a light guide plate (LGP);
a housing that receives the LGP; and
a first LGP guide member coupled to the housing,
wherein the housing comprises a bottom surface, a first sidewall, and a second sidewall,
wherein the first and second sidewalls are connected to edges of the bottom surface, the first and second sidewalls are disposed adjacent to each other and are spaced apart from each other, and a first corner of the bottom surface is disposed between the first and second sidewalls,
wherein the first LGP guide member is disposed in a gap between the first and second sidewalls,
wherein the LGP comprises a corner inclined surface disposed at a corner of the LGP, and
wherein the first LGP guide member comprises a guide inclined surface, wherein the guide inclined surface of the first LGP guide member is disposed opposite to the corner inclined surface of the LGP; and
a display panel disposed on the backlight unit.

13. The display device of claim 12 , further comprising:
a housing coupling member disposed between the housing and the display panel, wherein the housing coupling member fixes the display panel to the housing.

14. The display device of claim 13 , wherein the housing comprises a protruding portion that protrudes outwardly from the first sidewall, and the housing coupling member is disposed on the protruding portion.

15. The display device of claim 14 , wherein the housing coupling member comprises a light-absorbing material or a reflective material.

16. The display device of claim 12 , wherein
the housing further comprises a third sidewall,
the third sidewall is disposed opposite to the first sidewall, the third sidewall is spaced apart from the second sidewall, and a second corner of the bottom surface is disposed between the second and third sidewalls, and
the backlight unit further comprises a second LGP guide member, wherein the second LGP guide member is disposed in a gap between the second and third sidewalls.

17. The display device of claim 16 , wherein the second LGP guide member comprises a guide inclined surface, wherein the guide inclined surface of the second LGP guide member is disposed opposite to the another corner inclined surface of the LGP disposed at another corner of the LGP.

18. The display device of claim 17 , wherein an inclination angle of the guide inclined surface of the first LGP guide member with respect to the second sidewall is greater than an inclination angle of the guide inclined surface of the second LGP guide member with respect to the second sidewall.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Won Chul
• Park Dong Jin
• Shin Taek Sun
• Sim Jin Gyu
• Oh Jung Gil
• You Kwang Sun
• Jin Byoung Jin
• Choi Jong Hyeon

Classifications

• G02B6/0093

  Means for protecting the light guide · CPC title

• G02B6/0088 Primary

  of the light guide or other optical sheets in the package · CPC title

• G02F1/1335

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title