US 2003/0198038 A1 · Backlight assembly and liquid crystal display apparatus having the same

Abstract

A backlight assembly including a light guide plate having a plurality of side surfaces, a first lamp having a first lamp tube disposed adjacent to the plurality of side surfaces, first and second electrodes disposed at opposite end portions of the first lamp tube, a second lamp having a second lamp tube disposed adjacent to the plurality of side surfaces, third and fourth electrodes disposed at opposite end portions of the second lamp tube, the third and first electrodes being disposed adjacent to one another, and the fourth and second electrodes being disposed adjacent to one another, a connector for electrically connecting the first and third electrodes, and a power supply for supplying a first discharge voltage to the second electrode and a second discharge voltage to the fourth electrode, the first and second discharge voltages having a phase difference of 180° and a same voltage level.

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Drawings

Claims20

Dependent claims

A backlight assembly comprising:

a light guide plate having a plurality of side surfaces, for changing a direction and an optical property of a light provided from an external source;
a first lamp having a first lamp tube disposed adjacent to the plurality of side surfaces, a first electrode disposed at a first end portion of the first lamp tube and a second electrode disposed at a second end portion opposite the first end portion of the first lamp tube;
a second lamp having a second lamp tube disposed adjacent to the plurality of side surfaces, a third electrode disposed at a third end portion of the second lamp tube and a fourth electrode disposed at a fourth end portion, the third end portion being disposed adjacent to the first end portion and the fourth end portion being disposed adjacent to the second end portion;
a connector for electrically connecting the first electrode to the third electrode;
and
a power supply for supplying a first discharge voltage to the second electrode and a second discharge voltage to the fourth electrode, the first and second discharge voltages having a phase difference of 180° and a same voltage level.

3 more elements

A backlight assembly comprising:

a light guide plate having first, second, third, and fourth side surfaces, for changing a direction and an optical property of a light provided from an external source;
a first lamp having a first lamp tube disposed adjacent to the first and second side surfaces, a first electrode disposed on a surface of a first end portion of the first lamp tube and a second electrode disposed at an interior of a second end portion of the first lamp tube, the second end portion being opposite the first end portion of the first lamp tube, the first lamp tube having an L shape;
a second lamp having a second lamp tube disposed adjacent to the third and fourth side surfaces, a third electrode disposed on a surface of a third end portion of the second lamp tube and a fourth electrode disposed at an interior of a fourth end portion of the second lamp tube, the third end portion being disposed adjacent to the first end portion and the fourth end portion being disposed adjacent to the second end portion, and the second lamp tube having the L shape;
a conductive lamp connecting member for electrically connecting the first electrode to the third electrode;
and
a power supply for supplying a first discharge voltage to the second electrode and a second discharge voltage to the fourth electrode, the first and second discharge voltages having a phase difference of 180° and a same voltage level.

3 more elements

Dependencies are inferred from the claim text.

Description5,172 words

Summary1,790 words

#1. Field of the Invention

#The present invention relates to a backlight assembly and an LCD (Liquid Crystal Display) apparatus, and more particularly to a backlight assembly having a reduced size and an LCD apparatus having the same.

#2. Description of the Related Art

Brief description of the drawings15 figures

#The above and other advantages of the present invention will become readily apparent by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein:

#FIG. 1 is a perspective view showing a conventional CCFL;

#FIG. 2 is a perspective view showing another conventional CCFL;

Detailed description3,058 words

#FIG. 4 is a schematic view showing a backlight assembly according to a first embodiment of the present invention.

#Referring to FIG. 4, a backlight assembly 250 includes a light guide plate 280, a first lamp 210, a second lamp 220, a discharge voltage supply part 230, a lamp connecting member 240 and a receiving container 260.

#The light guide plate 280 has a plate shape, that is at least three side surfaces, a light reflecting surface and a light emitting surface. In the present invention, the light guide plate 280 has a first, a second, a third and a fourth side surface 281, 282, 283 and 284, respectively,

Facts

Application

10/295,384Filed 15 Nov 2002

Priority

KR 2002-2161319 Apr 2002

Published

23 Oct 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

G02B 6/009
Positioning aspects: of the light source in the package
G02B 6/0071
Incandescent lamp or gas discharge lamp: with elongated shape, e.g. tube
G02B 6/0083
Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides,…:…
G02B
Optical elements, systems or apparatus

Backlight assembly and liquid crystal display apparatus having the same

Life of this patent

Backlight assembly and liquid crystal display apparatus having the same

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims20

Description5,172 words

Drawings

Classification4 codes

Life of this patent

Description5,172 words