JPH11251772A - Plasma display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To thin the whole plasma display device by improving heat dissipation effect of a PDP(plasma display pannel). SOLUTION: An optical filter 3 is stuck on a display window of a front surface frame 2, a PDP 4 constituted of two glass plates or the like is accommodated in the rear of the optical filter 3 and covered with a rear part cover 10, and a plasma display device 1 displaying TV image or the like is constituted. A heat conduction plate 5 constituted of a plate having high thermal conductivity like an aluminum plate is stuck on the back of the PDP 4 with adhesive agent or the like, so that partial heat generation due to display of the PDP 4 is restrained, and uniform heat generation in the PDP is realized. Circuit boards 7a, 7a... on which electronic circuits or the like which drive the PDP 4 by TV image signals or the like are divided into a plurality of portions and mounted on the heat conducting plate 5 at specified intervals with each other. Radiating fins 6, 6... are arranged between a plurality of portions of the divided circuit boards 7a, 7a..., thereby dissipating the heat generated from the PDP.

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 which is thin and has a good heat radiation effect.

[0002]

2. Description of the Related Art PDPs are widely used as thin display devices capable of displaying television images and the like on a large screen. However, since the PDP itself is thin, local temperature rise is likely to occur due to heat concentration during display. Besides, P
Since an optical filter or the like for protecting the PDP or the like is arranged on the front surface of the DP, sufficient heat radiation cannot be achieved. The back is PD
It is necessary to mount a circuit board or the like for driving P, and heat radiation is hindered. Therefore, even if the PDP itself is thin, the plasma display device as a whole has a certain thickness, and there is a problem that the characteristics of the panel display cannot be sufficiently obtained.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to improve the heat radiation effect of a PDP and reduce the thickness of the plasma display device as a whole.

[0004]

SUMMARY OF THE INVENTION In a plasma display device for displaying television images and the like using a PDP (plasma display panel), a heat conductive plate made of an aluminum plate or other high heat conductive plate adhered to the back of the PDP. When,
A circuit board for driving the PDP, which is divided into a plurality of parts on the opposite side of the PDP of the heat conductive plate and placed at a predetermined interval, and a plurality of radiating fins adhered between the circuit boards. To dissipate the heat generated from the PDP,
Achieve soaking of PDP.

[0005] A heat conductive sheet made of a high heat conductor such as silicon rubber is sandwiched between the PDP and the heat conductive plate.

A plurality of bosses are planted on the heat conducting plate, and some of the circuit boards are placed on the bosses, and the circuit boards are mounted in a double manner.

An engaging portion for the circuit board is provided at the tip of the radiating fin, and at least one of the bosses also serves as the radiating fin.

A thick plate is erected at the tip of the radiating fin,
A screw hole is provided in the thick plate, and the circuit board is screwed and locked.

The circuit board mounted on the heat conductive plate has a solder surface facing the heat conductive plate, and the circuit board mounted on the boss has
With the component surface facing the heat conducting plate, the component surfaces of both circuit boards are mounted facing each other.

[0010] Means for changing the position of mounting the circuit board on the boss is provided so that the parts of the circuit board whose component surfaces face each other do not collide with each other.

[0011] The rear cover of the plasma display device has a shape in which the top of a hollow quadrangular pyramid having a top toward the rear is cut and covered with a flat plate.

The rear cover is made of a resin having a ventilation hole on the slope of the quadrangular pyramid. Inside the rear cover, a ventilation hole made of a metal mesh having substantially the same shape as the rear cover is provided, and the device is electromagnetically driven. A windshield cover is provided for shielding.

On the upper slope of the windshield cover,
Provide a cooling fan.

The ventilation holes of the rear cover are provided diagonally above and below the device, and the heat radiating fan is provided diagonally above.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram of (A) a rear view and (B) a side cross-sectional view (cross-section c-c in FIG. 1) of the plasma display device according to the present invention. FIG. 2 is an exploded view of the same side section. Optical filter 3 on display window of front frame 2
With two glass plates behind it
The plasma display device 1 that stores P4 and covers it with the rear cover 10 to display television images and the like is configured.
A heat conductive plate 5 made of a high heat conductive plate such as an aluminum plate is adhered to the rear surface of the PDP 4 with an adhesive or the like, thereby suppressing local heat generation due to the display of the PDP 4 and achieving uniform PDP heat. .
Note that a thermal conductive sheet (not shown) made of a high thermal conductive material such as silicon rubber is sandwiched between the PDP 4 and the thermal conductive plate 5 so that the thermal conductivity between the PDP 4 and the thermal conductive plate 5 can be reduced. Adhesion is improved and the heat transfer coefficient can be increased. Circuit boards 7a, 7a,... On which an electronic circuit or the like for driving the PDP 4 by a television image signal or the like are divided into a plurality of parts and mounted on the heat conductive plate 5 at predetermined intervals. The radiation fins 6, 6, ... are provided between the circuit boards of the plurality of divided circuit boards 7a, 7a, ... to radiate the heat generated from the PDP.

FIG. 3 is an enlarged rear view (A) of a peripheral portion of a circuit board of the plasma display device according to the present invention,
(B) is a side view, (C) is a plan view. In the heat conduction plate 5,
A plurality of bosses are planted, and some of the circuit boards 7b, 7b,.
Is mounted, and the circuit board is mounted twice. Circuit board 7
The bosses for stopping the circuit boards 7b, 7b,... can be separately provided, but the circuit boards 7b, 7b,. May be placed. In this case, the radiation fins 6, 6,.
A thick plate 6a is erected at the tip of the board, and a screw hole is provided in the thick board to connect the circuit boards 7b, 7b,.
・ Screw-in and lock. The circuit boards 7a, 7a,... Mounted on the heat conductive plate 5 have the solder surface on the heat conductive plate side, and the circuit boards 7b, 7b,. With the component side as the heat conduction plate side,
Circuit boards 7a, 7a,... And circuit boards 7b, 7b,.
Are mounted so as to face each other, and the ventilation passages for heat dissipation are integrated into one to enable efficient heat dissipation. Circuit boards 7a, 7a, ..., 7b, 7b,
··············································································································································································· 手段 手段 ７ 手段 手段 手段 手段 手段 手段! Are placed so that they do not collide with each other. Therefore, for example, the circuit boards 7b, 7b,... Are staggered and attached so that the screw holes 7bb of the circuit boards 7b, 7b,.

The rear cover 10 of the plasma display device 1 shown in FIG. 1 has a shape in which the top of a hollow quadrangular pyramid having a top toward the rear is cut and covered with a flat plate to reduce the thickness of the device. The rear cover 10 is made of resin having ventilation holes 10a and 10b on the slope of the quadrangular pyramid. The rear cover 10 has ventilation holes made of a metal mesh having substantially the same shape as the rear cover 10 inside the rear cover, and electromagnetically controls the device. An air conduction shield cover 8 for shielding is provided. On the upper slope of the air-conducting shield cover 8, heat-dissipating fans 9, 9, ... are provided. The ventilation holes 10a and 10b of the rear cover 10 are provided in the upper left half and the left upper half when viewed obliquely above the apparatus 1, for example, when viewed from behind, and in the diagonally lower part such as the lower right half and the lower right half thereof, Are provided at positions corresponding to the obliquely upward ventilation holes 10a to improve ventilation by the chimney effect.

[0018]

As described above, a heat conductive plate made of an aluminum plate or other high heat conductive plate adhered to the back of the PDP, and a plurality of heat conductive plates divided on the opposite surface of the PDP from each other and A circuit board for driving a PDP placed at a predetermined interval and the like, and a plurality of radiating fins stuck between the circuit boards are provided to dissipate heat generated from the PDP and equalize the temperature of the PDP. By improving the efficiency, the heat radiation efficiency of the PDP can be increased, and the entire plasma display device can be made thin.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of (A) a rear view and (B) a side cross-sectional view (cross-section c-c in FIG. 1) of a plasma display device according to the present invention.

FIG. 2 is an exploded view of a side cross section of the plasma display device according to the present invention.

FIG. 3 is an enlarged rear view of a peripheral portion of a circuit board of the plasma display device according to the present invention, FIG.
(C) It is a top view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plasma display apparatus 2 Front frame 3 Optical filter 4 PDP 5 Heat conduction plate 6 Heat dissipation fin 7a, 7b Circuit board 8 Wind conduction shield cover 9 Heat dissipation fan 10 Rear cover

Claims (11)

[Claims] 1. PDP (Plasma Display Panel)
In a plasma display device for displaying television images and the like by using a PDP, a heat conductive plate made of an aluminum plate or other high heat conductive plate adhered to the back of the PDP and a plurality of heat conductive plates divided on the opposite surface of the PDP A circuit board for driving the PDP placed at a predetermined distance from each other, and a plurality of radiating fins attached between the circuit boards;
A plasma display device characterized in that heat generated from P is dissipated and the PDP is evenly heated. 2. The plasma display device according to claim 1, wherein a heat conductive sheet made of a high heat conductor such as silicon rubber is sandwiched between the PDP and the heat conductive plate. 3. The circuit board according to claim 2, wherein a plurality of bosses are implanted on the heat conductive plate, and some of the circuit boards are mounted on the bosses, and the circuit boards are mounted in a double manner. 2. The plasma display device according to 1. 4. The plasma display device according to claim 3, wherein a locking portion for a circuit board is provided at a tip portion of the heat radiation fin, and at least one of the bosses also serves as a heat radiation fin. 5. The fin according to claim 4, wherein a thick plate is provided at the end of the heat radiation fin, a screw hole is provided in the thick plate, and the circuit board is screwed and locked. Plasma display device. 6. The circuit board mounted on the heat conductive plate has a solder surface on the heat conductive plate side, and the circuit board mounted on the boss has a component surface on the heat conductive plate side. 4. The plasma display device according to claim 3, wherein the surfaces are mounted so as to face each other. 7. A means for changing a mounting position of the circuit board on the boss is provided so that components of the circuit board whose component surfaces face each other do not collide with each other. 7. The plasma display device according to claim 6, wherein: 8. The plasma display device according to claim 1, wherein the rear cover of the plasma display device is formed by cutting the top of a hollow quadrangular pyramid having a top toward the rear and covering the top with a flat plate. . 9. The rear cover is made of a resin having a ventilation hole on a slope of a quadrangular pyramid. Inside the rear cover, a ventilation hole made of a metal mesh having substantially the same shape as the rear cover is provided. 9. The plasma display device according to claim 8, further comprising an air conduction shield cover for shielding electromagnetically. 10. The plasma display device according to claim 9, wherein a heat dissipation fan is provided on an upper slope of the wind guide shield cover. 11. The plasma display device according to claim 9, wherein the ventilation holes of the rear cover are provided diagonally above and below the device, and the radiating fan is provided diagonally above the device.