Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Reexamination Certificate
1999-11-24
2001-04-17
Philogene, Haissa (Department: 2821)
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
C315S169400, C313S257000, C313S268000, C313S292000
Reexamination Certificate
active
06218784
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a PDP(Plasma Display Panel) apparatus, and in particular to a PDP apparatus combined a PCB(Printed Circuit Board) substrate on which formed driving circuits and panel unit into a single body. The panel unit includes two flat type substrates facing each other and a plurality of discharge cells disposed between the two flat type substrates.
2. Description of the Background Art
Recently, a flat panel display such as a LCD(Liquid crystal display), a FED(Field emission display), a PDP(Plasma Display Panel), etc. is intensively studied. Among the above-described units, the PDP is a display apparatus and attracts a big attention based on its advantage such as an easier fabrication due to its simple structure, a high luminance and high light emitting efficiency, a good memory function, and a wider view angle above 160 for thereby implementing a large size screen above 40 inches.
The PDP apparatus includes a panel unit formed of a plurality of discharge cells, and a driving circuit unit for supplying a power or signal to the panel unit.
The panel unit is formed of a pair of glass base plates, and a plurality of discharge cells disposed therebetween.
The driving circuit for driving the panel unit is installed on a PCB(Printed Circuit Board) substrate. In addition, the discharge cells of the panel unit and the driving circuit formed on the PCB substrate are connected by a certain known method.
FIG. 1
is an exploded respective view illustrating a panel unit of a conventional PDP apparatus.
As shown therein, the panel unit of the conventional PDP apparatus includes two glass substrates
10
and
20
, and a plurality of discharge cells
30
formed therebetween. Among two glass substrates
10
and
20
, the glass substrate
10
is a front substrate
10
for displaying a certain character or image, and the other glass substrate
20
is a rear substrate
20
.
A plurality of address electrodes
21
are parallely formed at a certain distance on the upper surface of the rear substrate
20
formed of a glass material, a dielectric layer
22
is formed on the upper surfaces of the address electrodes
21
and the rear substrate
20
, and a barrier
23
is formed between each neighboring address electrodes
21
for separating the discharge cells
30
. A fluorescent substance layer
24
is formed at a lateral wall of the barrier
23
of each discharge cell
30
and on the upper surface of the dielectric layer
22
.
A pair of sustain electrodes
11
are formed in parallel on the lower surface of the front substrate
10
which is another glass substrate, and a dielectric layer
12
is formed on the lower surfaces of the sustain electrodes
11
and the front substrate
10
, and a dielectric layer protection film
13
is formed on the surfaces of the dielectric layer
12
.
The panel unit of the PDP is formed by bonding the front substrate
10
and the rear substrate
20
.
However, the apparatus for displaying a certain character or image is not implemented by the above-described panel unit. Namely, a PDP driving circuit unit is used for applying a certain voltage and signal to the panel unit. In addition, the PDP driving circuit unit is generally a PCB(Printed Circuit Board) substrate which is formed by disposing a plurality of driving circuit integration devices on a substrate having printed wires thereon for driving the panel unit. In addition, the electrodes of the panel units and the circuit of the driving circuit unit are electrically connected for thereby implementing a PDP apparatus.
The conventional method for electrically connecting the panel unit and the driving circuit unit will be explained.
FIGS. 2A through 2C
illustrate the method for electrically connecting the panel unit and the PDP driving circuit of FIG.
1
.
FIG. 2A
illustrates a structure of the PDP apparatus in which the driving circuit unit, namely, a PCB substrate
101
is disposed under the panel unit
100
, and the electrodes of the panel unit
100
and the driving circuit of the PCB substrate
101
are connected by a conductive rubber
102
.
FIG. 2B
illustrates a structure that the PCB substrate
104
is installed near the panel unit
103
, and the panel unit
103
and the PCB substrate
104
are connected by a thermal pressing method.
FIG. 2C
illustrates a method for installing the PCB substrate
107
under the panel unit
106
and connecting the electrodes of the panel unit
106
and the driving circuit of the PCB substrate by disposing therebetween a flexible printed circuit
108
formed of an anisotropic conductive film.
However, in the above-described conventional PDP apparatus, since the PCB having the panel unit and driving circuit is formed at different substrates, respectively, the size and weight of the PDP apparatus are increased.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a PDP apparatus which is capable of significantly decreasing a size and weight of a PDP apparatus by integrally forming a panel unit and driving circuit unit on a single substrate.
To achieve the above object, there is provided a PDP apparatus in which a panel unit(discharge cell) is formed on one surface of a flat metallic substrate, and a driving circuit unit is installed on another surface thereof.
To achieve the above object, there is provided a PDP apparatus according to the present invention which includes a metallic lower substrate, a first insulation layer formed on an upper surface of one side of the metallic lower substrate, an upper substrate formed opposite to the one side of the metallic lower substrate, a plurality of barriers formed between the metallic lower substrate and the upper substrate for defining a plurality of discharge spaces, and a second insulation layer formed on another surface of the metallic lower substrate and including the driving circuit unit thereon.
Additional advantages, objects and features of the invention will become more apparent from the description which follows.
REFERENCES:
patent: 5477105 (1995-12-01), Curtin et al.
patent: 5672083 (1997-09-01), Curtin et al.
patent: 5859508 (1999-01-01), Ge et al.
Jang Woo-Sung
Kim Je-Seok
Fleshner & Kim LLP
LG Electronics Inc.
Philogene Haissa
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