Electric lamp or space discharge component or device manufacturi – Apparatus – Assembly means
Reexamination Certificate
2000-12-06
2003-12-02
Ramsey, Kenneth J. (Department: 2879)
Electric lamp or space discharge component or device manufacturi
Apparatus
Assembly means
C445S067000, C445S060000, C313S582000
Reexamination Certificate
active
06656008
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a device for producing plasma display panels and, more particularly, to a device for forming the partition walls on the base panel of such a plasma display panel, the device being designed to prevent an undesired movement of printed address electrodes of the base panel during a process of forming the partition walls on said base panel, thus finally allowing a precise arrangement of the partition walls with the address electrodes on the base panel.
2. Description of the Prior Art
FIG. 1
is a view, showing the construction of a conventional device for forming the partition walls on the base panel of a plasma display panel (PDP). As shown in the drawing, the conventional partition wall forming device comprises a lower plate
102
, a plate punch
112
, and an upper plate
114
. During a process of forming desired partition walls on the base panel
104
of a PDP, the lower plate
102
seats the base panel
104
thereon, with a partition wall sheet
106
of a predetermined thickness being laid on the panel
104
and a plurality of regularly spaced electrodes
108
arranged on the partition wall sheet
106
. The plate punch
112
, having a plurality of partition wall forming grooves
110
, is positioned above the partition wall sheet
106
. The upper plate
114
holds the top surface of the plate punch
112
, and moves the punch
112
in a vertical direction. In the conventional partition wall forming device, the lower plate
102
is held by a lower support
116
, while the upper plate
114
is held by an upper support
118
.
A plurality of heaters
120
and
124
are set within both the plate punch
112
and the lower plate
102
. Therefore, the plate punch
112
and the lower plate
102
are heated to predetermined temperatures by the heaters
120
and
124
, thus easily forming desired partition walls on the base panel
104
when compressing the partition wall sheet
106
by the plate punch
112
and the lower plate
102
. In the drawing, the reference numeral
105
denotes a dielectric layer coated on the partition wall sheet
106
while completely covering the electrodes
108
.
The conventional partition wall forming device is operated as follows:
FIG. 2
is a sectional view of the base panel of a PDP having the partition walls formed by the conventional forming device of FIG.
1
.
In an operation of the partition wall forming device, the upper plate
114
actuates the plate punch
112
, thus moving the punch
112
downward to a predetermined height in a vertical direction so as to allow the punch
112
to press the top surface of the partition wall sheet
106
down. Therefore, a plurality of regularly spaced partition walls
130
, having a shape corresponding to the partition wall forming grooves
110
of the punch
112
, are formed on the sheet
106
of the base panel
104
.
However, the conventional partition wall forming device is problematic as follows: That is, when the plate punch
112
presses the top surface of the partition wall sheet
106
of the base panel
104
down to form the partition walls
130
on the sheet
106
as described above, the printed electrodes
108
positioned at the area around the edge of the base panel
104
are undesirably moved to the side of the partition walls
130
. Therefore, the electrodes
108
may fail to be precisely arranged with the partition walls
130
, thus failing to produce a desired PDP.
In addition, the flow characteristics of the partition wall sheet
106
are different from those of the printed electrodes
108
due to both heat of the heaters
120
and
124
and punching pressure during the process of forming the partition walls
130
on the base panel
104
. Therefore, it is very difficult to control such an undesired movement of the electrodes
108
within the partition wall sheet
106
.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a device for forming the partition walls on the base panel of a PDP, which is designed to prevent an undesired movement of the printed address electrodes of the base panel during a process of forming the partition walls on the base panel, thus finally allowing a precise arrangement of the partition walls with the address electrodes on the base panel.
In order to accomplish the above object, the present invention provides a device for forming partition walls of a plasma display panel, comprising: a lower plate used for seating the base panel of the plasma display panel thereon during a partition wall forming process, with a partition wall sheet of a predetermined thickness formed on the base panel and a plurality of electrodes arranged on the base panel; a punch provided with a plurality of partition wall forming grooves having a shape corresponding to that of the partition walls to be formed on the base panel, with a plurality of lands formed between the partition wall forming grooves and used for pressing the partition wall sheet during the partition wall forming process, and an electrode holding means formed on each of the lands and used for preventing the electrodes from being undesirably moved during the process; and an upper plate positioned above the punch so as to hold the punch and to move the punch in a vertical direction within a predetermined range.
In another embodiment, the present invention provides a device for forming partition walls of a plasma display panel by pressing a partition wall sheet of a predetermined thickness, formed on the base panel of the plasma display panel, using a punch, wherein the punch is a roll punch having a predetermined diameter with a rotating shaft mounted to the central axis of the roll punch, the roll punch also having a plurality of partition wall forming grooves, with a plurality of lands formed between the partition wall forming grooves and used for pressing the partition wall sheet during a partition wall forming process, and an electrode holding means formed on each of the lands and used for holding printed electrodes of the partition wall sheet so as to prevent the electrodes from being undesirably moved during the partition wall forming process.
REFERENCES:
patent: 5992320 (1999-11-01), Kosaka et al.
patent: 6039619 (2000-03-01), Kang et al.
patent: 6482062 (2002-11-01), Yao et al.
patent: 2001229812 (2001-08-01), None
patent: WO 9827571 (1998-06-01), None
Hong Soon Kug
Kim Bong Hyang
Kim Deok Hwan
Oh Sang Jin
Colón German
LG Electronics Inc.
Ramsey Kenneth J.
LandOfFree
Device for forming partition walls of plasma display panel does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for forming partition walls of plasma display panel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for forming partition walls of plasma display panel will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3137242