JP2001147644A - Plasma display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display device which can reduce a bias of the temperature distribution of a PDP(plasma display panel) to make obtainable a sufficient heat radiation effect. SOLUTION: A chassis 5 for heat radiation is stuck to a part including a display area X and a non-display area on the rear face of a plasma display panel 4 with a double coated adhesive tape 7 between them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a plasma display device, and more particularly to a plasma display panel (P).
The present invention relates to a plasma display device provided with a heat radiation measure for heat generated from DP).

[0002]

2. Description of the Related Art In recent years, a plasma display device has been put into practical use, and a plasma display panel (PDP) has a row electrode pair and a column electrode on inner surfaces of a pair of substrates opposed to each other with a discharge space therebetween. An electrode is arranged, and a discharge cell is formed by each intersection of the row electrode pair and the column electrode, and display is performed as one pixel by performing a gas discharge on each discharge cell. When light is emitted from a PDP, a large amount of heat is generated from the display surface. Therefore, it is necessary to adopt a structure having a sufficient heat radiation effect in a plasma display device.

FIG. 5 is a perspective view showing a schematic configuration of a conventional plasma display device, and FIG. 6 is a side view of the plasma display device. As shown in these figures, the plasma display device has a front substrate 5 as a discharge space.
1 and back substrate 52, and PDP
A circuit board 54 for driving the unit 53 is configured to be integrated via a chassis 55. The chassis 55 supports the plasma display panel 53 on its front surface and also supports the circuit board 54 on its back surface to integrate the two.

The chassis 55 is made of a metal such as aluminum, and has a structure in which a plurality of horizontal plates 56 and vertical plates 57 are combined in a lattice shape. This lattice-like structure is employed to secure a space for heat radiation inside and to reduce the weight. The PDP 53 and the circuit board 54 are electrically connected by a flexible cable 58. The chassis 55 is fixed to the back surface (the outer surface of the back substrate) of the PDP 53 using a double-sided adhesive tape 59.

[0005]

The plasma display device is characterized in that it is thin and capable of displaying a large screen. However, if the brightness is increased due to the thinness, the plasma display device having a large screen generates heat due to light emission. In particular, the temperature difference between the display area and the non-display area or between the center and the periphery of the display area of the PDP 53 becomes remarkable. In particular,
In the case of the conventional lattice-shaped chassis 55, although a heat radiation space can be secured, the heat radiation is not performed from the entire surface of the PDP 53 because it does not contact the display area of the entire surface of the PDP 53. There is a problem that the temperature distribution becomes non-uniform and it becomes difficult to efficiently release heat over the entire surface of the PDP 53.

The present invention has been proposed in order to cope with such circumstances, and there is provided a plasma display device capable of reducing a bias of a temperature distribution of a PDP and obtaining a sufficient heat radiation effect. It is intended to provide.

[0007]

(1) In order to achieve the above object, a heat dissipation chassis is fixed to the back surface of a portion including a display area and a non-display area of a plasma display panel with an adhesive interposed therebetween. It becomes.

(2) In the above item (1), the adhesive is a double-sided adhesive tape.

(3) In the above item (1) or (2), a heat conductive sheet covering a peripheral portion of a display area and a non-display area outside the display area is attached to the back surface of the plasma display panel. are doing.

(4) In the above items (1) to (3),
A heat conductive sheet is attached to a back surface of the plasma display panel so as to cover a region from a central portion to a peripheral portion of the display region.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a plasma display device according to the present invention will be described below with reference to the accompanying drawings. 1 is a rear view of a plasma display device according to an embodiment of the present invention, FIG. 2 is a side view, and FIG.
It is the figure seen from the direction of the III-III line.

As shown in these figures, the plasma display device 1 includes a front substrate 2 and a rear substrate 3 which are two glass substrates, and a plasma display panel (PDP) 4 Are formed. Further, the chassis 5 is interposed between the PDP 4 and a circuit board (not shown) constituting a drive circuit for driving the PDP 4, and both are integrated.

The chassis 5 is formed of a metal such as aluminum and has an area covering at least the entire rear surface of the rear substrate 3 (display area X and non-display area Y). As shown in FIG. 3, the front surface 5A of the chassis 5 is entirely flat, and the rear surface 5B is provided with a plurality of radiating fins 6 made of thin plates at predetermined intervals in the vertical direction. I have. Here, as shown in FIGS. 1 and 2, the rear substrate 3 is formed to be smaller than the surface area of the chassis 5.

As shown in FIG. 2, a front surface 5A of the chassis 5 is fixed to the entire rear surface of the rear substrate 3 via a double-sided adhesive tape 7 as an adhesive. Is also fixed to one surface of the chassis 5 by a double-sided adhesive tape 7. As a result, the rear substrate 3 comes into close contact with the chassis 5 over its entire surface, and the heat transmitted from the rear substrate 3 is radiated to the air from the radiating fins 6 through the chassis 5 into the air. Become.

As described above, according to the present embodiment, the chassis 5 is fixed over the entire back surface of the rear substrate 3 of the PDP 4 via the double-sided adhesive tape 7, so that the display of the PDP 4 The heat generated from the region X is uniformly conducted to the chassis 5, and as a result, the temperature difference between the light emitting cell and the non-light emitting cell and the temperature difference between the display region X and the non-display region Y are reduced. , The temperature distribution on the surface of the PDP 4 can be made uniform. As a result, thermal stress generated in the PDP 4 is reduced, aging and the like are reduced, and the durability of the plasma display device is improved.

FIG. 4 is a front view showing a rear substrate 3 of a plasma display device according to a modification of the above-described embodiment. In the plasma display device shown in FIG.
A heat conductive sheet 8 made of aluminum foil or the like so as to cover a peripheral portion of the display region X on the back surface of the back substrate 3 and a non-display region Y
(Hatched portion in FIG. 4) is adhered, and the chassis 5 is fixed from above with a double-sided adhesive tape 7 not shown interposed therebetween. Therefore, heat generated in the display area X is efficiently transmitted from the heat conductive sheet 8 to the non-display area Y, and a temperature difference generated between the display area X and the non-display area Y can be reduced. . The heat conductive sheet 8 (shaded area)
The solid line shown therein is the boundary between the display area X and the non-display area Y.

The back surface of the back substrate 3 has front and back regions X
Since the band-shaped heat conductive sheet 9 covering the peripheral portion from the center portion of the display region X is affixed, the heat of the central portion of the display region X is transmitted to the non-display region Y via the heat conductive sheet 9,
The temperature difference between the center of the display area X and the non-display area Y can be reduced.

In the above embodiment, the chassis 5
Is fixed by using a double-sided adhesive tape 7 as an adhesive to be fixed to the PDP 4, but if the adhesive has heat resistance, for example, a gel-like chemical adhesive or the like may be used. .

[0019]

According to the first and second aspects of the present invention, the heat generated from the display area of the plasma display panel can be uniformly radiated from the chassis, and the temperature unevenness on the surface of the plasma display panel can be reduced. The distribution can be made uniform.

According to the third and fourth aspects of the present invention, heat generated in the display area can be efficiently conducted to the non-display area by the heat conductive sheet, and is generated between the display area and the non-display area. The temperature difference can be reduced.

[Brief description of the drawings]

FIG. 1 is a rear view of a plasma display device according to an embodiment of the present invention.

FIG. 2 is a side view of the plasma display device according to the embodiment of the present invention.

FIG. 3 is a diagram of FIG. 1 viewed from the direction of line III-III.

FIG. 4 is a front view showing a rear substrate of a plasma display device according to a modification of the embodiment shown in FIGS.

FIG. 5 is a perspective view showing a schematic configuration of a conventional plasma display device.

FIG. 6 is a side view of a conventional plasma display device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 plasma display device 2 front substrate 3 rear substrate 4 plasma display panel (PDP) 5 chassis 5A front surface 5B rear surface 6 heat radiation fin 7 double-sided adhesive tape 8 9 heat conductive sheet X display area Y non-display area

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Daisuke Takao 15-1 Nishinoya, Washinasu, Fukuroi-shi, Shizuoka Prefecture Pioneer Co., Ltd. (72) Inventor Sadao Yokoi 15-1 Nishinotani, Fukuroi-shi, Shizuoka, Pioneer F-term in Shizuoka Factory Co., Ltd. (reference) 5C094 AA33 AA45 BA31 EC10 FA01 GB01 5G435 AA12 BB06 EE04 GG43

Claims (4)

[Claims] 1. A plasma display device comprising a heat dissipation chassis fixed to the back surface of a portion of a plasma display panel including a display area and a non-display area with an adhesive interposed therebetween. 2. The plasma display device according to claim 1, wherein the adhesive is a double-sided adhesive tape. 3. The plasma display panel according to claim 1, wherein a heat conductive sheet covering a peripheral portion of a display region and a non-display region outside the display region is attached to a back surface of the plasma display panel. Plasma display device. 4. The plasma display device according to claim 1, wherein a heat conductive sheet covering an area from a central part to a peripheral part of a display area is attached to a back surface of said plasma display panel.