Lamp apparatus for liquid crystal display device

• US 6,459,203 B1
• Filed: 12/05/2000
• Issued: 10/01/2002
• Est. Priority Date: 07/20/2000
• Status: Expired due to Fees

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Kim, Kyoung Sub
• Primary Examiner(s): Philogene, Haissa
• Assistant Examiner(s): Alemu, Ephrem
• Application Number:
  US09/729,165
• Publication Number:
  US 20020047554A1
• Time in Patent Office: 665 Days
• Field of Search: 315/58, 315/57, 315/56, 315/246, 315/169.3, 315/169.4, 313/25, 313/281-285, 313/623, 349/65, 349/64, 349/70, 362/260, 362/262, 362/221, 362/225, 362/227, 362/217
• US Class Current: 315/56
• CPC Class Codes: F21V 19/001 the light sources being semiconductors devices, e.g. LEDs
• CPC Class Codes: F21Y 2113/20 of different form
• CPC Class Codes: H01J 5/62 Connection of wires protruding from the vessel to connectors carried by the separate part

Abstract

A lamp apparatus for a liquid crystal display that is adaptive for providing a thin-thickness liquid crystal display. In the apparatus, a ground wire is commonly connected to low voltage electrodes of lamps. High voltage wires are connected, in series, to high voltage electrodes of the lamps. A first plug connects at least one of the high voltage wires and the ground wire. A second plug connects the other high voltage wires.

Claims

1. A lamp apparatus for a liquid crystal display, comprising:

at least two lamps having low voltage and high voltage electrodes;

a ground wire connected commonly to the low voltage electrodes of the lamps;

high voltage wires connected, in series, to high voltage electrodes of the lamps;

a first plug for connecting at least one of the high voltage wires and the ground wire; and

a second plug for connecting the other high voltage wires.

2. The lamp apparatus according to claim 1, further comprising:

a ground plate for electrically connecting the low voltage electrodes to each other;

a clamp pin protruded at a desired inclined angle from the ground plate; and

a ring formed at the end of the ground wire.

3. The lamp apparatus according to claim 2, wherein the clamp pin is obliquely extended on the ground plate.

4. The lamp apparatus according to claim 3, wherein the clamp pin is inserted into the ring.

5. The lamp apparatus according to claim 2, wherein the ground plate, the clamp pin and the ring to which the low voltage electrodes are commonly connected is sealed by solder.

6. The lamp apparatus according to claim 2, wherein the ground plate is made from phosphorus bronze.

7. The lamp apparatus according to claim 1, wherein the ground plate is a printed circuit board.

8. The lamp apparatus according to claim 1, wherein the first plug has a first number of terminals and second plug has a second number of terminals, wherein the first number and the second number are not equal.

9. The lamp apparatus according to claim 8, wherein the first plug has two terminals and the second plug has three terminals.

10. The lamp apparatus according to claim 2, further comprising:

a lamp housing;

a holder installed at the housing to support the lamps and the ground plate; and

a holder cap at the housing the holder to pass the ground wire therethrough for securing the holder to the ground wire.

11. A lamp apparatus for a liquid crystal display, comprising:

a plurality of lamps having low voltage and high voltage electrodes;

a ground wire connected in parallel to the low voltage electrodes of the lamps;

high voltage wires connected in series to high voltage electrodes of the lamps;

a first plug for connecting at least one of the high voltage wires and the ground wire;

a second plug for connecting the other high voltage wires;

wherein the low voltage electrodes are electrically connected to a ground plate and the ground plate is electrically connected to the ground wire.

12. The lamp apparatus according to claim 11, wherein the ground plate further comprises:

a clamp pin protruded at a desired inclined angle from the ground plate; and

a plurality of bosses formed in the ground plate;

wherein the low voltage electrodes pass through the plurality of bosses.

13. The lamp apparatus according to claim 12, wherein the ground wire further comprises:

a ring formed end of the ground wire;

wherein the ring is inserted into the clamp pin.

14. The lamp apparatus according to claim 12, wherein the clamp pin is obliquely extended on the ground plate.

15. The lamp apparatus according to claim 13, wherein the clamp pin is electrically connected to a ring.

16. The lamp apparatus according to claim 13, wherein the ground plate, the clamp pin and the ring to which the low voltage electrodes are commonly connected is sealed by solder.

17. The lamp apparatus according to claim 12, wherein the ground plate is made from phosphorus bronze.

18. The lamp apparatus according to claim 12, wherein the ground plate is a printed circuit board.

19. The lamp apparatus according to claim 11, wherein the first plug has a first number of terminals and second plug has a second number of terminals, wherein the first number and the second number are not equal.

20. The lamp apparatus according to claim 11, wherein the first plug has two terminals and the second plug has three terminals.

21. The lamp apparatus according to claim 11, further comprising:

a lamp housing;

a holder installed at the lamp housing to support the plurality of lamps and the ground plate; and

a holder cap at the lamp housing to pass the ground wire therethrough for securing the holder to the ground wire.

22. The lamp apparatus according to claim 11, wherein the first plug has two terminals, and the second plug has three terminals connected to at least one of a power supply and an inverter.