Electric lamp and discharge devices – With gas or vapor – Three or more electrode discharge device
Reexamination Certificate
1998-08-28
2001-03-06
Patel, Nimeshkumar D. (Department: 2879)
Electric lamp and discharge devices
With gas or vapor
Three or more electrode discharge device
C313S584000, C313S046000
Reexamination Certificate
active
06198222
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a plasma display device, and more particularly, to a plasma display device with heat dissipation channels.
2. Description of the Prior Art
A common plasma display device has two major mechanical structures: an internal plasma display module and an external housing. The plasma display module comprises a plasma display panel made of two glass substrates, a metal plate, a metallic supporting rack, and a plurality of circuit boards. The supporting rack is formed by a plurality of metallic beams. The metal plate is installed on the front surface of the supporting rack. The plasma display panel is attached to the front surface of the metal plate by double sided tape. The plurality of circuit boards is installed at the rear side of the supporting rack. The housing is formed by a front frame and a rear frame. The front and rear frames of the housing protect the plasma display module.
Electric fans are often installed within the plasma display device for dissipating heat generated by the plasma display panel and the circuit boards during operation. The above mentioned plasma display device has the following disadvantages:
1. The metal plate and the supporting rack are very thick thus will block the internal air flow and make heat dissipation difficult.
2. Due to the complexity of the internal structure of the plasma display device, the electric fans can only effectively force the air flow through neighboring area, thus preventing full heat dissipation of the whole area.
SUMMARY OF THE INVENTION
It is therefore a primary objective of the present invention to provide a plasma display device with a heat dissipation channel to solve the aforementioned problems.
In a preferred embodiment, the present invention provides a plasma display device comprising:
a rectangular plasma display panel having a front side and a rear side, the front side of the plasma display panel being used for displaying images;
a rectangular side frame comprising upper, lower, left and right bars over which the plasma display panel is vertically installed at a front end of the four bars of the side frame, and the front side of the plasma display panel is facing in the same direction as the front end of the side frame;
a rectangular rear plate vertically installed in a rear end of the four bars of the side frame for protecting internal components of the plasma display device; and
a supporting rack installed inside the side frame between the plasma display panel and the rear plate comprising a horizontal top beam fixed at the upper bar of the side frame, a horizontal bottom beam fixed at the lower bar of the side frame, and a plurality of vertical columns mounted between the top beam and bottom beam, the rear side of the plasma display panel being fixed on a front end of the plurality of vertical columns;
wherein vertical spaces between neighboring vertical columns and between the vertical columns and the left and right bars of the side frame are used as heat dissipation channels for upwardly dissipating heat generated from the rear side of the plasma display panel when displaying images away from the plasma display device.
It is an advantage of the present invention that the plasma display device has a very simple structure. The vertical columns of the supporting rack not only provide a strong support, but also form a plurality of heat dissipation channels for dissipating heat generated from the rear side of the plasma display panel and by the six circuit boards away from the plasma display device.
These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment which is illustrated in the various figures and drawings.
REFERENCES:
patent: 4771365 (1988-09-01), Cichocki et al.
patent: 5869919 (1999-02-01), Sato et al.
patent: 5971566 (1999-10-01), Tani et al.
Acer Display Technology Inc.
Guharay Karabi
Hsu Winston
Patel Nimeshkumar D.
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