JPH07210095A - Plasma display device - Google Patents

Abstract

PURPOSE:To prevent the temperature from rising at a part of a PDP or control circuit board where the temperature is low owing to reradiated heat from a fitting plate by forming an opening at the center part of the fitting part while a margin for mounting on the PDP is left. CONSTITUTION:The control circuit board 12 is fixed to the fitting plate 15 made of metal such as aluminum fitted to the back of the plasma display panel(PDP) 11 by adhesion, etc., by using a clamping member. The control circuit 12 has a circuit for supplying electric power for plasma discharge to the PDP 11, and components such as a field effect transistor used for the circuit generate heat. The PDP 11 itself rises in temperature owing to the plasma discharge. To prevent the heat radiated from the PDP 11 or control circuit board 12 to the fitting plate 15 from being reradiated from the fitting plate 15, the opening part 21 is formed in the center part of the fitting plate 15 while the margin 22 for mounting on the PDP 11 is left. Further, the interval between the PDP 11 and control circuit board 12 is widened.

Description

Detailed Description of the Invention

[0001]

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 panel (hereinafter referred to as PDP).
Abbreviated) to prevent the PDP from being heated by the heat generated in the control circuit board.

[0002]

2. Description of the Related Art In a plasma display device, since the depth of a PDP used as a display body is thinner than that of a cathode ray picture tube having the same screen size, for example, as shown in the perspective view of the PDP unit shown in FIG. By disposing the control circuit board 12 having the control circuit of the PDP and the like facing the mounting board 15 attached by adhesion or the like, the depth dimension of the device can be made larger than that of a receiver using a cathode ray picture tube. Although it has the advantage that it can be greatly shortened and that a large screen can be placed in a small room, for example, PDP
Has a problem that the color of the display image is discolored when the temperature rises above a prescribed level, while the control circuit board 12 arranged facing the PDP 11 is equipped with heat-generating circuit components. Therefore, heat generated by these circuit components causes PDP
There is a problem that the temperature of 11 rises. The mounting plate 15 is P
It is necessary to mount the control circuit board 12 so as to face the back surface of the DP 11, but the temperature of the mounting board 15 rises due to heat generation of the components of the control circuit board 12 or heat generation of the PDP 11.
There is a problem that the temperature of the PDP 11 or the control circuit board 12 rises due to the heat re-radiated from the mounting plate 15.

[0003]

As described above, the PDP
The depth of the device can be shortened by disposing the control circuit board so as to face the back surface of the PDP, but this makes it easier for the temperature of the PDP to rise due to the heat generated by the components mounted on the control circuit board. An object of the present invention is to attach a low temperature portion of a PDP or a control circuit board to a mounting plate interposed between the PDP and the control circuit board by re-radiating the heat radiated from the PDP or the control circuit board and stored. It's about not heating too.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a housing and a P vertically arranged in the housing.
A plasma display device including a DP unit, wherein the PDP unit includes a PDP, a mounting plate mounted on the back surface of the PDP, and a P mounted on the mounting plate.
A plasma display device comprising a control circuit board on which a DP control circuit is mounted and a connecting line connecting the PDP and the control circuit board, and an opening is provided in the central portion of the mounting plate while leaving a mounting margin for the PDP. Configured.

[0005]

With the above construction, in the plasma display device according to the present invention, the central portion of the mounting plate mounted on the back surface of the PDP is provided with an opening leaving a mounting margin for the PDP, and the PDP and the control circuit. By increasing the distance from the plate, the temperature of the mounting plate does not rise due to the heat from the PDP or the control circuit board, and the heat is not radiated secondarily from the mounting plate, which results in the temperature of the PDP or the control circuit board. Suppresses unnecessary temperature rise in the low temperature range.

[0006]

Embodiments of the plasma display device according to the present invention will now be described in detail with reference to the drawings. FIG. 1 is a schematic view of a plasma display device according to the present invention, FIG. 2 is a perspective view of an essential part of a PDP unit, FIG. 3A is a side sectional view of an essential part of the PDP unit, and FIG. A plan view showing an embodiment of a mounting plate for mounting, (C)
FIG. 6 is a plan view showing another embodiment of the mounting plate.

In FIG. 1, 1 is a front part of the housing, 2 is a rear part of the housing, and 3 is a PDP unit. Upper surface of front part 1 of the housing, rear part 2 of the housing
Ventilation holes are provided on the upper and lower surfaces of the PDP so that the heat generated in the PDP unit 3 can be easily released. Reference numeral 4 is a speaker.

The PDP unit 3 is constructed as in the example shown in FIG. That is, the control circuit board 12 is disposed so as to face the back surface of the PDP 11, and the signals for controlling the PDP 11 are supplied from the control circuit board 12 mainly by the connecting lines 13 of the upper and lower parts (not shown), and the plasma discharge is performed. Power for is mainly supplied by the left and right connecting lines 14. Control circuit board
12 is fixed by a fastening member to a mounting plate 15 made of metal such as aluminum and attached to the back surface of the PDP 11 by adhesion or the like.

The control circuit board 12 has a circuit for supplying a power source for plasma discharge to the PDP 11, and parts such as a field effect transistor (FET) used in this circuit generate heat. The temperature of the PDP 11 itself also rises due to the plasma discharge. The mounting plate 15 is warmed by these heats, the PDP 11 is warmed by the heat radiated secondarily from the mounting plate 15, and the electrolytic capacitor and the like mounted on the control circuit board 12 are relatively weak to heat. The PDP 11 has a problem that the color of the image is discolored when the temperature rises above the specified level, and the electrolytic capacitor causes a leakage current to increase due to heat and shortens its life. There's a problem.

Therefore, in order to prevent the heat radiated from the PDP 11 or the control circuit board 12 to the mounting plate 15 from being re-radiated from the mounting plate 15, for example, as shown in FIG. An opening 21 is provided in the portion, leaving a mounting margin 22 for the PDP 11. Alternatively, as shown in (c) of FIG. 2, a mounting margin 22 for the PDP 11 is left in the center portion of the mounting plate 15 to be 2
Two openings 23 are provided. Along with this, the gap between the PDP 11 and the control circuit board 12 is widened. It should be noted that FIG. 9A is a side sectional view of a main part of the PDP unit 3.

As described above, by forming a portion without the mounting plate 15 between the PDP 11 and the control circuit board 12, the PD
The heat from P11 or the heat from the control circuit board 12
It is possible to prevent unnecessary temperature rise due to re-radiation to the low temperature portion of the PDP 11 or the control circuit board 12 via 15.

[0012]

As described above, according to the plasma display device of the present invention, there is no mounting plate for storing heat from the PDP or the control circuit board in the central portion between the PDP and the control circuit board. Therefore, it is possible to prevent the temperature of the PDP or the temperature of the control circuit board from rising due to the re-radiation heat from the mounting plate, and to reduce the adverse effects such as discoloration of the image color of the PDP screen. It is possible to suppress the temperature rise of the relatively heat-sensitive components mounted.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing an outline of a plasma display panel unit.

3A and 3B are explanatory views of a mounting plate of the plasma display device according to the present invention, in which FIG. 3A is a sectional view of a main part of the PDP unit, FIG. 3B is a plan view showing an embodiment of the mounting plate, and FIG. It is a top view which shows the other Example of a mounting plate.

[Explanation of symbols]

 1 Front part of housing 2 Rear part of housing 3 PDP unit 11 PDP 12 Control circuit board 13 Connection line 14 Connection line 15 Mounting plate 21 Opening 22 PDP mounting allowance 23 Opening

Claims (2)

[Claims] 1. A plasma display device comprising a housing and a plasma display panel unit vertically arranged in the housing, wherein the plasma display panel unit is a plasma display panel,
A mounting plate mounted on the back surface of the plasma display panel, a control circuit board mounted with a control circuit of the plasma display panel mounted on the mounting plate, and a connecting line connecting the plasma display panel and the control circuit board. The plasma display device is characterized in that an opening is provided in the central portion of the mounting plate leaving a mounting margin for the plasma display panel. 2. The plasma display device according to claim 1, wherein a plurality of openings are provided in a central portion of the mounting plate, leaving an allowance for mounting on the plasma display panel.