Liquid crystal display apparatus

• US 20040263716A1
• Filed: 05/04/2004
• Published: 12/30/2004
• Est. Priority Date: 11/13/2001
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kwon, Yoon-Soo, Lee, Sang-Duk
• Application Number:
  US10/494,623
• Publication Number:
  US 20040263716A1
• Time in Patent Office: Days
• US Class Current: 349/61
• CPC Class Codes: G02B 6/0071 with elongated shape, e.g. tube
• CPC Class Codes: G02B 6/0086 Positioning aspects
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side

Abstract

Disclosed is an LCD apparatus for reducing a whole size thereof. The LCD apparatus includes a lamp unit (700), a light guiding unit (800) having a projecting surface, a reflecting surface, and a side surface, and a receiving unit having a sidewall and a bottom prolonged from the sidewall. The lamp unit (700) is disposed between the side surface of the light guiding unit (800) and the sidewall of the receiving unit so that the side surface is surrounded by means of the lamp unit (700). The size of the LCD device can be reduced, and a thickness increase of the LCD apparatus may be prevented while obtaining an enough amount of the light to display an image. Further, the light is uniformly distributed over the whole surface of the light guiding unit (800), and it can prevent the parts of the circuits of the display unit (200) from being damaged.

Claims

1. A backlight assembly comprising:

a lamp unit for generating a light;

a light guiding unit having a projecting portion for projecting the light, a reflecting portion for reflecting the light to the projecting portion and a side portion which connects the projecting portion with the reflecting portion and receives the light, for guiding the light; and

a receiving unit having a sidewall and a bottom prolonged from the sidewall, for receiving the lamp unit and the light guiding unit,

wherein the lamp unit is disposed between the side portion of the light guiding unit and the sidewall of the receiving unit so as to surround the side portion of the light guiding unit.

2. The backlight assembly of claim 1, wherein an opening is formed at a central portion of the bottom of the receiving unit by a predetermined size.

3. The backlight assembly of claim 2, wherein the receiving unit further comprises protruding portions respectively formed at corners of the bottom of the receiving unit so as to prevent the lamp unit from being deviated from the receiving unit, the protruding portions being separated from the sidewall of the receiving unit by a predetermined interval.

4. The backlight assembly of claim 3, wherein the light guiding unit further comprises clamping portions formed in the light guiding unit by cutting off the light guiding unit, each of the clamping portions being corresponded to the protruding portions.

5. The backlight assembly of claim 4, wherein the protruding portions are combined with the clamping portions to prevent the light guiding unit from being moved toward the lamp unit.

6. The backlight assembly of claim 3, further comprising:

a reflecting unit installed at a lower portion of the light guiding unit and having at least one first guide hole formed in one end thereof, for reflecting the light leaked from the light guiding unit;

a bottom chassis having at least one second guide hole, for preventing the lamp unit, the light guiding unit and the reflecting unit from being deviated from the receiving unit by combining with the receiving unit; and

an optical sheet installed at an upper portion of the light guiding unit, for adjusting brightness of the light emitted from the light guiding unit.

7. The backlight assembly of claim 6, wherein the receiving unit further comprises at least one first guide boss formed on the sidewall thereof and combined with the first guide hole to guide the reflecting unit to a position where the reflecting unit is installed.

8. The backlight assembly of claim 6, wherein the receiving unit further comprises at least one second guide boss respectively formed on upper surfaces of the protruding portions and combined with the second guide hole formed in the bottom chassis to guide the bottom chassis to a location where the bottom chassis is combined with the receiving unit.

9. The backlight assembly of claim 6, wherein at least one third guide hole is formed in a first end and a second end opposite to the first end of the optical sheet, respectively.

10. The backlight assembly of claim 9, wherein the receiving unit further comprises at least one third guide boss formed on the bottom thereof and combined with the third guide hole to prevent the optical sheet from being moved.

11. The backlight assembly of claim 6, wherein the optical sheet further comprises wing portions respectively prolonged from the first and second ends of the optical sheet.

12. The backlight assembly of claim 11, wherein fixing grooves are formed in the receiving unit by cutting off the bottom of the receiving unit so that the fixing grooves receive the wing portions of the optical sheet to prevent the optical sheet from being moved.

13. The backlight assembly of claim 2, further comprising a reflecting plate installed on the bottom of the receiving unit and an outer of the lamp unit, for reflecting the light from the lamp unit to the light guiding unit.

14. A backlight assembly comprising:

a lamp unit for generating a light;

a light guiding unit having a projecting portion for projecting the light, a reflecting portion for reflecting the light to the projecting portion and a side portion which connects the projecting portion with the reflecting portion and receives the light, for guiding the light; and

a receiving unit having a sidewall and a bottom prolonged from the sidewall, for receiving the lamp unit and the light guiding unit,

wherein the lamp unit is disposed between the side portion of the light guiding unit and the sidewall of the receiving unit and includes a first light generating portion which covers a first side portion of the light guiding unit, a second light generating portion which covers a second side portion adjacent to the first portion, a third light generating portion which covers a third side portion facing to the first side portion and a fourth light generating portion which covers a fourth side portion facing to the second side portion and adjacent to the third side portion.

15. The backlight assembly of claim 14, wherein the lamp unit includes a first lamp having an L shape by integrally forming the first and second light generating portions and a second lamp having the L shape by integrally forming the third and fourth light generating portions.

16. The backlight assembly of claim 15, wherein the first lamp further comprises a first high-voltage power supply line electrically connected to a high-voltage electrode of the first lamp, for supplying a high voltage from outside to the first lamp and a first low-voltage power supply line electrically connected to a low-voltage electrode of the first lamp, for supplying a low voltage from outside to the first lamp, and the second lamp further comprises a second high-voltage power supply line electrically connected to a high-voltage electrode of the second lamp, for supplying the high voltage from outside to the second lamp and a second low-voltage power supply line electrically connected to a low-voltage electrode of the second lamp, for supplying a low voltage from outside to the second lamp.

17. The backlight assembly of claim 16, wherein a first guide groove is formed at a first sidewall of the receiving unit adjacent to the first and second light generating portions so as to guide the first low-voltage power supply line toward the first high-voltage power supply line, and a second guide groove is formed at a second sidewall of the receiving unit adjacent to the third and fourth light generating portions so as to guide the second low-voltage power supply line toward the second high-voltage power supply line.

18. The backlight assembly of claim 16, wherein the first and second high-voltage power supply lines are adjacently located on a first corner portion among corner portions of the receiving unit.

19. The backlight assembly of claim 18, wherein the first and second low-voltage power supply lines are adjacently located on a second corner portion among the corner portions of the receiving unit, the second corner portion being positioned in a diagonal direction of the first corner portion.

20. The backlight assembly of claim 16, further comprising:

a first lamp holder for capping a first end of the first lamp to prevent the first high-voltage power supply line from being damaged;

a second lamp holder for capping a second end of the first lamp to prevent the first low-voltage power supply line from being damaged; and

a third lamp holder for enclosing a bending portion of the first lamp to prevent the first lamp having the L shape from being damaged.

21. The backlight assembly of claim 16, further comprising:

a first lamp holder for capping a first end of the second lamp to prevent the second high-voltage power supply line from being damaged;

a second lamp holder for capping a second end of the second lamp to prevent the second low-voltage power supply line from being damaged; and

a third lamp holder for enclosing a bending portion of the second lamp to prevent the second lamp having the L shape from being damaged.

22. The backlight assembly of claim 14, wherein the lamp unit is formed in a square shape having the first, the second, the third and the fourth light generating portions integrally formed with each other.

23. The backlight assembly of claim 22, further comprising a first power supply line electrically connected to a first end of the lamp unit having the square shape, for supplying a low voltage to the lamp unit through the first end and a second power supply line electrically connected to a second end of the lamp unit having the square shape, for supplying a high voltage to the lamp unit through the second end, the first and second ends are adjacently located on a first corner among corners of the receiving unit.

24. The backlight assembly of claim 24, further comprising:

a first lamp holder for capping the first end of the lamp having the square shape so as to prevent the first power supply line from being damaged;

a second lamp holder for capping the second end of the lamp having the square shape so as to prevent the second power supply line from being damaged; and

a third lamp holder for respectively enclosing bending portions of the lamp having the square shape so as to prevent the lamp from being damaged.

25. A liquid crystal display apparatus comprising:

a lamp unit for generating a light;

a light guiding plate having a projecting portion for projecting the light, a reflecting portion for reflecting the light to the projecting portion and a side portion which connects the projecting portion with the reflecting portion and receives the light, for guiding the light;

a mold frame having a sidewall of which a central portion is opened by a predetermined size and a bottom prolonged from the sidewall, for receiving the lamp unit and the light guiding unit,

a reflecting sheet disposed under the light guiding plate and having at least one first guide hole formed at one end, for reflecting the light leaked from the light guiding plate;

a bottom chassis having at least one second guide hole and combined with the mold frame so as to prevent the lamp unit, the light guiding plate and the reflecting sheet from being deviated from the mold frame;

an optical sheet disposed on the light guiding plate, for adjusting brightness of the light emitted from the light guiding plate;

a display unit disposed on the optical sheet, for receiving the light from the optical sheet and displaying an image; and

a top chassis combined with the bottom chassis so as to fix the display unit to the mold frame,

wherein the lamp unit is disposed between the light guiding plate and the sidewall of the mold frame to surround the side portion of the light guiding plate.

26. The liquid crystal display apparatus of claim 25, wherein the mold frame further comprises protruding portions respectively formed at corners of the bottom thereof so as to prevent the lamp unit from being deviated from the mold frame, the protruding portions being separated from the sidewall of the mold frame by a predetermined interval.

27. The liquid crystal display apparatus of claim 26, wherein the light guiding plate further comprises clamping portions formed therein by cutting off the light guiding plate, each of the clamping portions being corresponded to the protruding portions.

29. The liquid crystal display apparatus of claim 25, wherein the mold frame further comprises at least one first guide boss formed on the sidewall thereof and combined with the first guide hole to guide the reflecting sheet to a position where the reflecting sheet is installed.

30. The liquid crystal display apparatus of claim 25, wherein the mold frame further comprises at least one second guide boss respectively formed on upper surfaces of the protruding portions and combined with the second guide hole formed in the bottom chassis to guide the bottom chassis to a location where the bottom chassis is combined with the mold frame.

31. The liquid crystal display apparatus of claim 25, wherein at least one third guide hole is formed in a first end and a second end opposite to the first end of the optical sheet, respectively.

32. The liquid crystal display apparatus of claim 31, wherein the mold frame further comprises at least one third guide boss formed at the bottom thereof and combined with the third guide hole to prevent the optical sheet from being moved.

33. The liquid crystal display apparatus of claim 25, wherein the optical sheet further comprises wing portions respectively prolonged from the first and second ends of the optical sheet.

34. The liquid crystal display apparatus of claim 33, wherein fixing grooves are formed in the mold frame by cutting off the bottom of the mold frame, the fixing grooves being received the wing portions of the optical sheet to prevent the optical sheet from being moved.

35. The liquid crystal display apparatus of claim 25, further comprising a reflecting plate installed on the bottom of the mold frame and an outer of the lamp unit, for reflecting the light from the lamp unit to the light guiding plate.

36. The liquid crystal display apparatus of claim 25, wherein the lamp unit includes a first L-shaped lamp having a first light generating portion enclosing a first end of the light guiding plate and a second light generating portion enclosing a second end adjacent to the first end;

and a second L-shaped lamp having a third light generating portion enclosing a third end opposite to the first end of the light guiding plate and a fourth light generating portion enclosing a fourth end opposite to the second end and adjacent to the third end.

37. The liquid crystal display apparatus of claim 36, wherein the first and second light generating portions are integrally formed and the third and fourth light generating portions are integrally formed, respectively.

41. The liquid crystal display apparatus of claim 25, wherein the lamp unit is formed in a square shape having a first light generating portion which covers a first side portion of the light guiding plate, a second light generating portion which covers a second side portion adjacent to the first side portion, a third light generating portion which covers a third side portion opposite to the first side portion and a fourth light generating portion which covers a fourth side portion opposite to the second side portion and adjacent to the third side portion, and the first, second, third and fourth light generating portions being integrally formed with each other.

42. The liquid crystal display apparatus of claim 41, further comprising a first power supply line electrically connected to a first end of the lamp having the square shape, for supplying a low voltage thereto;

and a second power supply line electrically connected to a second end of the lamp having the square shape, for supplying a high voltage thereto, the first and second ends are adjacently located on a first corner among corners of the mold frame.

43. The liquid crystal display apparatus of claim 42, further comprising:

a first lamp holder for capping the first end of the lamp having the square shape so as to prevent the first power supply line from being damaged;

a second lamp holder for capping the second end of the lamp having the square shape so as to prevent the second power supply line from being damaged; and

a third lamp holder for respectively enclosing bending portions of the lamp having the square shape so as to prevent the lamp from being damaged.

28. The liquid crystal display apparatus of claim 28, wherein the protruding portions are combined with the clamping portions so as to prevent the light guiding plate from being moved to the lamp unit.

38. The liquid crystal display apparatus of claim 38, further comprising:

a first high-voltage power supply line electrically connected to a high-voltage electrode of the first L-shaped lamp, for supplying a high voltage thereto;

a first low-voltage power supply line electrically connected to a low-voltage electrode of the first L-shaped lamp, for supplying a low voltage thereto;

a first lamp holder for capping a first end of the first L-shaped lamp so as to prevent the first high-voltage power supply line from being damaged;

a second lamp holder for capping a second end of the first L-shaped lamp so as to prevent the first low-voltage power supply line from being damaged; and

a third lamp holder for enclosing a bending portion of the first L-shaped lamp so as to prevent the first L-shaped lamp from being damaged.

39. The liquid crystal display apparatus of claim 38, further comprising:

a second high-voltage power supply line electrically connected to a high-voltage electrode of the second L-shaped lamp, for supplying a high voltage thereto;

a second low-voltage power supply line electrically connected to a low-voltage electrode of the second L-shaped lamp, for supplying a low voltage thereto;

a first lamp holder for capping a first end of the second L-shaped lamp so as to prevent the second high-voltage power supply line from being damaged;

a second lamp holder for capping a second end of the second L-shaped lamp so as to prevent the second low-voltage power supply line from being damaged; and

a third lamp holder for enclosing a bending portion of the second L-shaped lamp so as to prevent the second L-shaped lamp from being damaged.

40. The liquid crystal display apparatus of claim 39, wherein a first guide groove is formed at a first sidewall of the mold frame adjacent to the first and second light generating portions so as to guide the first low-voltage power supply line to the first high-voltage power supply line, and a second guide groove is formed at a second sidewall of the mold frame adjacent to the third and fourth light generating portions so as to guide the second low-voltage power supply line to the second high-voltage power supply line.