JPH10241556A - Cooling device for plasma display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool a plasma display be attaching a heat conductive metal plate to the plasma display, providing a corona generation electrode oppositely to the heat conductive metal plate and generating corona from the corona generation electrode to produce ion wind. SOLUTION: A plasma display 10 is attached to a heat conductive metal plate 30 via a high heat conductive sheet 20. In a surface opposite the surface of the heat conductive metal plate 20 to which the plasma display 10 is attached, a plurality of corona generation electrodes 60 are arranged in parallel and oppositely to the heat conductive metal plate 30. When a voltage is applied to the corona generation electrode 60, corona is generated from the corona generation electrode 60. Then, the heat conductive metal plate 30 act as an ion attraction electrode to produce ion wind toward the heat conductive metal plate 30, and the heat conductive metal plate 30 is cooled. Thus, the plasma display 10 is cooled and a compact cooling mechanism is provided with hardly causing noise problems.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display cooling device.

[0002]

2. Description of the Related Art Conventionally, as means for cooling a plasma display, means for cooling using a fan or means for cooling using a refrigerant as described in Japanese Patent Application Laid-Open No. 5-121005 are known. ing.

[0003]

However, the means for cooling using a fan has a problem in that noise during operation of the fan is large and a large space is required for installation of the fan. Further, the means for cooling using a refrigerant requires an airtight container for enclosing the refrigerant, and there is a problem that the production of the airtight container is troublesome.

[0004]

SUMMARY OF THE INVENTION The present invention provides a cooling device for a plasma display which solves the above-mentioned problems, and comprises a heat transfer metal plate attached to a plasma display, and a heat transfer metal plate. And a corona generating electrode disposed so as to face the, to generate an ion wind by generating a corona from the corona generating electrode,
Thus, the plasma display is cooled.

When a voltage is applied to the corona generating electrode arranged opposite to the heat transfer metal plate to generate corona from the corona generation electrode, ion wind is generated toward the heat transfer metal plate. The heat transfer metal plate is cooled by the ion wind, whereby the plasma display mounted on the heat transfer metal plate is cooled.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a state in which the plasma display is attached to an aluminum plate, and FIG. 2 is a sectional view showing a main part of FIG. The plasma display 10 is mounted on a heat transfer metal plate 30 such as an aluminum plate via a high heat conductive sheet 20. A driving element 40 is arranged around the plasma display 10. The element 40 is fixed to the heat transfer metal plate 30. The element 40 and the plasma display 10 are connected via a flexible substrate 50.

The purpose of using the high thermal conductive sheet 20 is that if the plasma display 10 is directly attached to the heat transfer metal plate 30, the plasma display 10 may be warped due to a difference in linear expansion between the two. This is to prevent heat generation and efficiently radiate heat generated by the plasma display 10 via the heat transfer metal plate 30. For this reason, as the high thermal conductive sheet 20, a sheet made of carbon, alumina or the like having a small linear expansion coefficient and excellent thermal conductivity is used. When an aluminum plate is used as the heat transfer metal plate 30, the material of the aluminum plate is A1
100 materials, A5000 series and A6000 series can be used.
Further, as the flexible substrate 50, a substrate having a thickness of about 50 to 100 microns, such as polyimide, glass epoxy, or filler, is used.

[0008] Plasma display 1 of heat transfer metal plate 30
0 is provided on the surface opposite to the surface on which the heat transfer metal plate 30 is mounted.
The corona generating electrode 60 is arranged so as to be opposed to. A plurality of the corona generating electrodes 60 are arranged in parallel and connected to a power source (not shown).

In FIG. 2, reference numeral 45 denotes a resin layer covering the driving element 40. Reference numeral 70 denotes a housing that covers the heat transfer metal plate 30 and the corona generating electrode 60 with the surface of the plasma display 10 exposed.
In actual use, the housing 70 covers the heat transfer metal plate 30 and the corona generating electrode 60 for use.

In the plasma display cooling device having the above configuration, when a voltage is applied to the corona generating electrode 60 from a power source (not shown), corona is generated from the corona generating electrode 60. Then, the heat transfer metal plate 30 functions as an electrode plate for ion attraction, and ion wind is generated toward the heat transfer metal plate 30 side. Heat transfer metal plate 3 by this ion wind
0 is cooled, thereby the plasma display 10
Is also cooled. At this time, the element 40 can be cooled at the same time.

FIG. 3 shows another embodiment of the present invention, which is different from the above-described embodiment in that a plurality of arc-shaped grooves 31 are provided in parallel on one surface side of a heat transfer metal plate 30, and Groove 31
The point is that the corona generating electrode 60 is arranged at the position. That is, the plasma display 10 is mounted on the surface side on which the arc-shaped groove 31 is provided via the high heat conductive sheet 20, and the arc-shaped groove 31 whose open side is closed by the high heat conductive sheet 20.
Inside, a corona generating electrode 60 is arranged.

FIG. 4 shows another embodiment of the present invention. The difference from the embodiment shown in FIG. 3 is that the heat transfer metal plate 30 has a high heat conduction on the surface side where the arc-shaped groove 31 is not provided. The point is that the plasma display 10 is attached via the conductive sheet 20.

FIG. 5 shows still another embodiment of the present invention. The difference from the embodiment shown in FIG. 4 is that a rectangular groove 32 is formed in parallel on one surface side of the heat transfer metal plate 30. It is a point provided with a plurality. As described above, the heat transfer metal plate 30 having the plurality of rectangular grooves 32 provided on one surface side in parallel can be easily formed by extrusion molding. In FIG. 5, the same parts as those of the embodiment shown in FIG.

In each of the embodiments shown in FIGS. 3 to 5, when a voltage is applied to the corona generating electrode 60,
Corona is generated from the corona generating electrode 60 and the heat transfer metal plate 3
Since ion wind is generated toward the zero side, the heat transfer metal plate 30
Is cooled, whereby the plasma display 10 and the element 40 are simultaneously cooled.

In each of the above embodiments, the plasma display 10 is attached to the heat transfer metal plate 30 via the high heat conductive sheet 20, but the plasma display 10 may be directly attached to the heat transfer metal plate. In addition, element 4
The mounting position of 0 is not particularly limited. For example, it may be mounted on a surface of a heat transfer metal plate opposite to the surface on which the plasma display 10 is mounted. Heat transfer metal plate 3
0 is not limited to an aluminum plate.

[0016]

As described above, the cooling device for a plasma display according to the present invention includes the heat transfer metal plate attached to the plasma display and the corona generating electrode disposed opposite to the heat transfer metal plate. The corona generating electrode generates corona to generate ion wind, thereby cooling the plasma display. Therefore, a noise problem hardly occurs, and a compact cooling mechanism can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view of a state where a plasma display is attached to a heat transfer metal plate.

FIG. 2 is a sectional view of a main part of FIG.

FIG. 3 is a sectional view of a main part showing one embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part showing another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part showing still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Plasma display 20 High heat conductive sheet 30 Heat transfer metal plate 31 Arc-shaped groove provided in heat transfer metal plate 32 Rectangular groove provided in heat transfer metal plate 40 Driving element 50 Flexible board 60 Corona generating electrode 70 Housing body

Claims (1)

[Claims] 1. A heat transfer metal plate attached to a plasma display, and a corona generating electrode arranged to face the heat transfer metal plate, and ion current is generated by generating corona from the corona generating electrode. , Thereby cooling the plasma display.