Computer graphics processing and selective visual display system – Display driving control circuitry
Reexamination Certificate
1998-03-17
2001-08-14
Wu, Xiao (Department: 2674)
Computer graphics processing and selective visual display system
Display driving control circuitry
C345S206000, C345S060000
Reexamination Certificate
active
06275220
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a flat panel type display apparatus, and in particular, to package structure for driver integrated circuits (hereinafter called ICs) for a color plasma display panel (hereinafter called color PDP).
In recent years, much developmental work on PDPs has been attempted. PDP's have many driver ICs. Each driver IC produces a lot of heat because they consume a lot of power. For this reason, a PDP radiates this heat by a heat sink fitted to an IC package.
FIG. 6
shows a prior art plasma display panel. A PDP
3
is fixed on a main face of an aluminum reinforcing plate
4
. The ends of the PDP
3
and the board
4
are located at the same point so as to be coincident. A driver IC is formed on an opposite side to the PDP
3
and suspended over the plate
4
. In detail, a printed wiring board
2
is attached to a back side of the plate
4
via spacers
5
. A quad flat package (QFP)
1
A in which an IC chip
1
is sealed with resin mold is formed on the printed wiring board
2
. The IC chip
1
is electrically connected to an electrode (not shown) formed on a side edge of the PDP
3
through a flexible printed wiring
6
, a connecter
6
a
, and wiring (not shown) of the printed wiring board
2
. A heat sink
7
is formed on the QFP
1
A to radiate heat produced by the IC chip
1
. As a result, the PDP needs a heat sink and the IC QFP in which an IC chip is sealed with molding resin which is contacted thereon with the heat sink for conducts. This structure is complex and troublesome to assemble, having inevitably high cost. Moreover it does not achieve significant heat radiation.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a flat panel type display apparatuses capable of improving heat radiating performance and reducing the number of constituent parts.
A flat panel type display apparatuses according to the present invention has at least one chip fitted to a metal-built reinforcing plate installed on the rear face of the flat panel.
According to the present invention, it is possible to radiate heat generated by ICs having a high power load, (e.g, 60 V or higher with high current) through a metal-built reinforcing plate.
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patent: 3701123 (1972-10-01), Barrett et al.
patent: 4039890 (1977-08-01), Bailey et al.
patent: 4109176 (1978-08-01), Ernsthauen et al.
patent: 5008656 (1991-04-01), Cheriff et al.
patent: 5390093 (1995-02-01), Himeno et al.
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patent: 5-11183 (1993-02-01), None
patent: 6-242454 (1994-08-01), None
patent: 6-260531 (1994-09-01), None
patent: 3005342 (1994-10-01), None
patent: 8-181168 (1996-07-01), None
NEC Corporation
Sughrue Mion Zinn Macpeak & Seas, PLLC
Wu Xiao
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