Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Discharge device load
Reexamination Certificate
2000-12-05
2002-10-01
Philogene, Haissa (Department: 2821)
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Discharge device load
C315S169400, C349S070000, C362S225000
Reexamination Certificate
active
06459203
ABSTRACT:
This application claims the benefit of Korean Patent Application No. 2000-41530, filed on Jul. 20, 2000, which is hereby incorporated by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a liquid crystal display, and more particularly to a lamp apparatus that is adaptive for providing a liquid crystal display having a thin thickness.
2 . Discussion of the Related Art
Generally, an active matrix liquid crystal display (LCD) uses a thin film transistor (TFT) as a switching device to display a moving picture. Since the LCD is able to provide a product having a smaller dimension than a Brown tube, it has been widely used in various applications of personal computer, notebook computer, office automation equipment such as copy machines, etc., and portable equipment such as personal data assistants and pagers, etc.
Such a LCD requires a backlight unit because it is not a self-emitting display device. The conventional backlight unit uses a lamp apparatus as a light source.
Referring to FIG.
1
and
FIG. 2
, the conventional lamp apparatus includes a plurality of lamps
22
received within a housing
26
, ground wires
21
connected, in series, to low voltage electrodes
22
a
of the lamps
22
by virtue of a soldering, a first plug
24
a
connected to the ends of the ground wires
21
, high voltage wires
23
connected, in series, to high voltage electrodes
22
b
of the lamps
22
by virtue of a soldering, and a second plug
24
b
connected to the ends of the high voltage wires
23
. The first and second plugs
24
a
and
24
b
are connected to a low-voltage side jack and a high-voltage side jack of a power supply or an inverter (not shown), respectively. The ground wire
21
and the high voltage wire
23
apply a low voltage and a high voltage from the plugs
24
a
and
24
b
to both electrodes
22
a
and
22
b
of the lamp
22
, respectively. Then, the lamp
22
causes a discharge accompanied by a light emission by a voltage difference of both electrodes
22
a
and
22
b.
As shown in
FIG. 3
, the low voltage electrode
22
a
of the lamp
22
is connected to the ground wire
21
by the soldering
27
. The connection between the low voltage electrode
22
a
of the lamp
22
and the ground wire is supported by a holder
25
engaged with the end of the housing
26
.
In such a lamp apparatus, since the low voltage electrode
22
a
of the lamp
22
is connected to the ground wire
21
by soldering, a bubble is included in a cold solder, i.e., soldering causes a poor connection. Also, in the conventional lamp apparatus, since a length of the ground wire
21
is long, it is difficult to align the wires and to provide a slim-type design of the liquid crystal module. Furthermore, since the connectors
24
a
and
24
b
connected, in series, to the ground wire
21
and the high voltage wire
23
has the same structure, it is not easy to distinguish the connectors from each other when the connectors are inserted to a jack of the inverter.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to a lamp apparatus for a liquid crystal display device that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
An object of the present invention is to provide a lamp apparatus that is adaptive for providing a thin-thickness liquid crystal display.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, a lamp apparatus for a liquid crystal display according to the present invention includes at least two lamps; a ground wire connected commonly to 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.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
REFERENCES:
patent: 4906888 (1990-03-01), Dunn et al.
patent: 5288249 (1994-02-01), Fitzgerald
patent: 5519289 (1996-05-01), Katyl et al.
patent: 5726722 (1998-03-01), Uehara et al.
patent: 5796382 (1998-08-01), Beeteson
patent: 5890793 (1999-04-01), Stephens
patent: 5921819 (1999-07-01), Lee
patent: 5962989 (1999-10-01), Baker
patent: 6075320 (2000-06-01), Winsor
patent: 6203172 (2001-03-01), Wanuch et al.
patent: 08 069705 (1996-03-01), None
Alemu Ephrem
LG.Philips LCD Co. , Ltd.
McKenna Long & Aldridge LLP
Philogene Haissa
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