Liquid crystal display apparatus

• US 10,222,541 B2
• Filed: 07/29/2016
• Issued: 03/05/2019
• Est. Priority Date: 03/08/2002
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Young-il
• Primary Examiner(s): Glick, Edward
• Assistant Examiner(s): Chung, David
• Application Number:
  US15/223,125
• Publication Number:
  US 20160334568A1
• Time in Patent Office: 949 Days
• Field of Search: None
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02B 6/009 of the light source in the package G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133314 Back frames
• CPC Class Codes: G02F 1/133322 Mechanical guidance or alignment of LCD panel support components
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 2201/465 Snap -fit

Abstract

Disclosed is an LCD apparatus having a reduced size and weight. The LCD apparatus includes a bottom chassis having a bottom surface and first to fourth sidewalls. The sidewall of the bottom chassis includes a supporting member for preventing a light guiding plate from being moved and a fixing boss for fixing an optical sheet. The bottom chassis includes a lamp insertion portion for receiving a lamp unit, which is disposed on the third and fourth sidewalls of the bottom chassis. The bottom chassis receives a reflecting plate, the light guiding plate and the optical sheet. A mold frame is coupled to the bottom chassis to fix the reflecting plate, the light guiding plate and the optical sheet to the bottom chassis. A display unit disposed on the mold frame is fixed to the mold frame by a top chassis coupled to the mold frame. Accordingly, a bottom mold frame for receiving a backlight assembly is removed, so that it is able to reduce a cost of the LCD apparatus and a weight thereof.

Claims

1. A backlight assembly comprising:

a light generating unit which generates light;

a light guide plate which guides the light, the light guide plate including a guiding portion, the guiding portion defined by a recess inwardly protruding with respect to a first side of the light guide plate; and

a receiving container which receives the light generating unit and the light guide plate, the receiving container including a bottom plate and a plurality of sidewalls which extend from the bottom plate;

wherein

a first sidewall of the receiving container includes a first portion and a second portion spaced apart from each other to define an empty space between a first end of the first portion and a second end of the second portion, and

the first sidewall further includes a fixing protrusion aligned with the first guiding portion of the light guide plate, the fixing protrusion including;

a first extending portion, which extends from the first end of the first portion, and

a second extending portion, which extends from the second end of the second portion,

wherein the first extending portion and the second extending portion have a plate shape perpendicular to the first portion and the second portion of the first sidewall.

2. The backlight assembly of claim 1, wherein the fixing protrusion further includes a third extending portion connected to the first extending portion and the second extending portion.

3. The backlight assembly of claim 2, wherein the third extending portion is disposed in the guiding portion of the light guide plate, and has a plate shape extending along a longitudinal direction of the first sidewall.

4. The backlight assembly of claim 1, wherein the fixing protrusion further includes a third extending portion that extends from an end of the first extending portion, and a fourth extending portion that extends from an end of the second extending portion toward the third extending portion.

5. The backlight assembly of claim 4, wherein the third extending portion and the fourth extending portion are spaced apart from each other.

6. The backlight assembly of claim 5, wherein the third extending portion and the fourth extending portion have a plate shape extending along a longitudinal direction of the first sidewall.

7. The backlight assembly of claim 1, further comprising a mold frame coupled to the receiving container.

8. The backlight assembly of claim 7, wherein the mold frame includes a protrusion, and at least one of the sidewalls of the receiving container includes a hole receiving the protrusion of the mold frame.

9. The backlight assembly of claim 1, further comprising an optical sheet disposed on the light guide plate.

10. The backlight assembly of claim 9, wherein at least one of the sidewalls of the receiving container includes a protrusion, and the optical sheet includes a hole receiving the protrusion.

11. The backlight assembly of claim 1, the receiving container including the fixing protrusion comprises at least one of a metal or a metal alloy.

12. A display apparatus comprising:

a backlight assembly which generates light; and

a display panel which displays an image using the light from the backlight assembly,

wherein the backlight assembly comprises;

a light generating unit which generates the light;

a light guide plate which guides the light, the light guide plate including a guiding portion, the guiding portion defined by a recess inwardly protruding with respect to a first side of the light guide plate; and

a receiving container configured to receive the light generating unit and the light guide plate, the receiving container including a bottom plate and a plurality of sidewalls extending from the bottom plate;

wherein

a first sidewall of the receiving container includes a first portion and a second portion spaced apart from each other to define an empty space between a first end of the first portion and a second end of the second portion, and

the first side wall further includes a fixing protrusion aligned with the guiding portion of the light guide plate, the fixing protrusion including;

a first extending portion, which extends from the first end of the first portion, and

a second extending portion, which extends from the second end of the second portion,

wherein the first extending portion and the second extending portion have a plate shape perpendicular to the first portion and the second portion of the first sidewall.

13. The display apparatus of claim 12, wherein the fixing protrusion further includes a third extending portion connected to the first extending portion and the second extending portion.

14. The display apparatus of claim 13, wherein the third extending portion is disposed in the guiding portion of the light guide plate, and has a plate shape extending along a longitudinal direction of the first sidewall.

15. The display apparatus of claim 12, wherein the fixing protrusion further includes a third extending portion that extends from an end of the first extending portion, and a fourth extending portion that extends from an end of the second extending portion toward the third extending portion.

16. The display apparatus of claim 15,

wherein the third extending portion and the fourth extending portion are spaced apart from each other, and

wherein the third extending portion and the fourth extending portion have a plate shape extending along a longitudinal direction of the first sidewall.

17. The display apparatus of claim 12, wherein the receiving container including the fixing protrusion comprises at least one of a metal or a metal alloy.

18. The display apparatus of claim 12, further comprising a printed circuit board is disposed on a rear surface of the receiving container and grounded to the receiving container.