JP2000338904A - Cooling structure for plasma display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling structure of a plasma display which can decrease a product cost without increasing the thickness of the plasma display and making a noise in order to cool the inside of a casing. SOLUTION: In a plasma display 10 in which PDP 11 is accommodated in a casing 13, this cooling structure is equipped with a heat sink 16 which is connected to the electron elements 15 installed in the casing 13 by the plate springs 17, a metallic rear cover 14 which is installed at the rear of the casing 13, an elastic body 18 which has the thermal conductivity and is interposed between the rear cover 14 and the heat sink 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure for preventing a temperature inside a plasma display from rising.

[0002]

As shown in FIG. 6, a plasma display panel (PDP) 1 is provided on the back side of a plasma display panel (hereinafter referred to as PDP) 1 as shown in FIG.
A substrate 2 on which a power supply circuit and a drive circuit for driving the PDP 1 are arranged is arranged, and the PDP 1 and the substrate 2 are housed in a casing 3.

In the plasma display having such a structure, the temperature inside the casing 3 increases due to heat generated from the PDP 1 and heat generated from electronic components such as a power transistor constituting a power supply circuit and a drive circuit of the substrate 2. Therefore, there is a possibility that the safety, life, image display, and the like of the PDP 1 may be adversely affected.

For this reason, conventionally, an exhaust fan 4 is attached to an upper portion inside a casing 3 and the exhaust fan 4
By performing the exhaust from the inside of the casing 3, the plasma display is cooled.

However, in the conventional cooling structure for a plasma display as described above, in order to mount the exhaust fan 4, it has been necessary to sacrifice the thinness of the depth, which is the greatest feature of the plasma display, to some extent.

When a small and thin exhaust fan is used to reduce the thickness of the display, the number of revolutions must be increased as compared with a large exhaust fan to increase the cooling effect. However, there arises a problem that the rotating sound becomes loud and hinders viewing. Furthermore, in the conventional cooling structure for a plasma display as described above, there is a problem of an increase in cost due to the attachment of an exhaust fan.

The present invention has been made to solve the above-mentioned problems in the cooling structure of the plasma display. That is, the present invention cools the inside of the casing without increasing the thickness of the plasma display or generating noise, and
It is an object of the present invention to provide a cooling structure for a plasma display that can reduce the product cost.

[0008]

According to a first aspect of the present invention, there is provided a plasma display cooling structure mounted in a casing of a plasma display in which a plasma display panel is housed in the casing. A heat dissipating member connected to the heat generating component, a metal cover member attached to a rear portion of the casing, and a heat conductive elastic member interposed between the cover member and the heat dissipating member. And is characterized by having.

In the cooling structure for a plasma display according to the first aspect of the invention, heat generated from a heat-generating component mounted in the casing by driving the plasma display panel is generated by a heat-radiating member connected to the heat-generating component. It is transmitted to the metal cover member attached to the rear part of the casing via the elastic member. Then, at a rear portion of the casing, heat is radiated to the atmosphere from a metal cover member that comes into contact with outside air in a wide area.

As described above, according to the first aspect,
Since the heat generated in the casing of the plasma display can be radiated without using the conventional exhaust fan, the plasma display can be cooled without impairing the thinness which is a feature of the plasma display, There is no possibility that a problem such as obstruction of viewing caused by the rotation noise of the exhaust fan occurs, and the cost for mounting the exhaust fan can be reduced.

According to a second aspect of the present invention, there is provided a cooling structure for a plasma display, wherein the elastic member is silicon rubber in addition to the configuration of the first aspect.

According to the cooling structure of the plasma display according to the second aspect of the present invention, heat is transmitted from the heat radiating member to the cover member through the silicone rubber having thermal conductivity, and the silicone rubber is attached by pressing.
Due to the elastic deformation of the rubber, the heat radiation member and the mounting surface of the cover member are brought into contact with high adhesion so that efficient heat transfer is performed. Further, when an external force is applied to the cover member, the elasticity of the silicon rubber causes the heat radiation member The effect of external force on the shock is damped.

According to a third aspect of the present invention, there is provided a cooling structure for a plasma display according to the first aspect, wherein the heat-generating component further comprises a power supply circuit for driving the plasma display panel. It is an electronic component that constitutes a drive circuit.

According to the cooling structure of the plasma display according to the third aspect of the present invention, of the electronic components constituting the power supply circuit and the driving circuit of the plasma display panel, heat generated from the heat-generating electronic components such as the power transistor is generated. The heat is transmitted from the heat radiation member connected to the electronic component to the cover member via the elastic member, and is radiated from the cover member to the atmosphere.

According to a fourth aspect of the present invention, in addition to the structure of the first aspect, the heat-generating component is connected to the cover member by a sandwiching member. It is characterized in that it is slidably clamped in the separating direction so as to be connected to the heat radiating member.

In the cooling structure for a plasma display according to the fourth aspect of the present invention, since the holding member slidably holds the heat-generating component in a direction of coming and going with respect to the cover member, an external force is applied to the cover member. Is applied, the heat dissipating member connected to the heat-generating component slides with respect to the heat-generating component.

Thus, the stress generated on the heat-generating component due to the external force applied to the plasma display is reduced.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a side sectional view showing an embodiment of a plasma display according to the present invention, and FIG.
It is an exploded view of this plasma display. 1 and 2, a plasma display 10 includes a plasma display panel (hereinafter, referred to as a PDP) 11 and a substrate 12 disposed behind the plasma display panel 11 housed in a casing 13. Is attached. The rear cover 14 is formed of a metal having a high heat transfer coefficient, for example, aluminum.

On the back side of the substrate 12, an electronic element 15 constituting a drive circuit for driving the PDP 11 is disposed. Further, of the electronic element 15, an element which generates heat such as a power transistor is provided. Is connected to the heat sink 16.

The heat sink 16 has legs 16A provided on both sides thereof mounted on the substrate 12 and fixed by soldering. As shown in FIGS. 3 and 4, a plate screwed to the side surface of the heat sink 16 is provided. The electronic element 15 is sandwiched between the heat sink 16 and the side surface of the heat sink 16 from behind by the spring 17, thereby being connected to the electronic element 15.

Further, an elastic body 18 such as silicon rubber made of a material such as silicon having high thermal conductivity is attached to the rear surface of the heat sink 16 which faces the inner wall surface of the rear cover 14. And this elastic body 1
8 is closely attached to the inner wall surface of the rear cover 14,
It is interposed and held between the heat sink 16 and the rear cover 14.

The heat sink 16 to which the elastic body 18 is attached is appropriately disposed on each part of the substrate 12 to which the heat-generating electronic element 15 is attached. In the above plasma display 10, the heat sink 1
The cooling structure is constituted by the elastic body 6, the elastic body 18, and the rear cover 14. That is, heat generated from the electronic element 15 such as a power transistor is transmitted to the heat sink 16 connected by the leaf spring 17 and further transmitted to the rear cover 14 via the elastic body 18 having high thermal conductivity. The heat is radiated into the atmosphere by the rear cover 14 having the large heat radiation area.

The elastic body 18 is pressurized and attached between the heat sink 16 and the rear cover 14, so that the elastic body 18 is elastically deformed, so that the heat sink 16
Is brought into contact with the mounting surface of the rear cover 14 with high adhesiveness, and heat conduction is performed with high efficiency.

According to the cooling structure as described above, the elastic body 18 is interposed between the heat sink 16 and the rear cover 14, and the electronic element 15 is sandwiched by the leaf spring 17 so that the heat sink 16 5A, even if pressure F acts on the rear cover 14 from the outside in the state shown in FIG.
(B), the elastic body 18 is compressed by its elasticity, and the electronic element 15 is slid relative to the heat sink 16 in the space between the heat sink 16 and the leaf spring 17. Therefore, the occurrence of stress due to external force is prevented in the solder portion fixing the electronic element 15 to the substrate 12.

As described above, according to the cooling structure of the plasma display as described above, the heat generated inside the plasma display can be released to the outside without providing a cooling fan as in the related art.

In the above example, an example is shown in which the heat sink 16 is attached to the substrate 12, but the heat sink 16 may be attached to another frame.

Further, the cooling structure having the above structure may be used in combination with the cooling fan. In this case, the number of cooling fans can be reduced and the number of cooling fans can be reduced. In addition, it is possible to reduce the rotational noise of the cooling fan and reduce the product cost.

The elastic body 18 is replaced with silicon rubber,
A metal spring member having high thermal conductivity may be used.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an example of an embodiment of the present invention.

FIG. 2 is an exploded view showing the same example.

FIG. 3 is a partially enlarged side view showing a main part of the example.

FIG. 4 is a partially enlarged front view showing a main part of the example.

FIG. 5 is an explanatory diagram showing a state when an external force is applied to the plasma display in the same example.

FIG. 6 is a side sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Plasma display 11 ... PDP12 ... Substrate 13 ... Casing 14 ... Rear cover (cover member) 15 ... Electronic element (heat-generating part, electronic component) 16 ... Heat sink (heat dissipation member) 16A ... Foot 17 ... Leaf spring (clamping member) 18) Elastic body (elastic member)

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masashi Kitagawa 15-1 Nishinoya, Washinasu, Fukuroi City, Shizuoka Prefecture Pioneer Co., Ltd. (72) Inventor Kenichiro Hosoi 15-1 Nishinoya, Washinasu, Fukuroi City, Shizuoka Prefecture Near Term Shizuoka Factory F-term (reference) 5C094 AA35 AA44 BA31 FB01 FB20 5G435 AA12 BB06 EE36 GG43 GG44

Claims (4)

[Claims] 1. A plasma display in which a plasma display panel is housed in a casing, a heat dissipating member connected to a heat-generating component mounted in the casing, and a metal member mounted on a rear portion of the casing. And a heat conductive elastic member interposed between the cover member and the heat radiating member. 2. The cooling structure for a plasma display according to claim 1, wherein said elastic member is silicon rubber. 3. The cooling structure for a plasma display according to claim 1, wherein the heat-generating component is an electronic component constituting a drive circuit for driving the plasma display panel. 4. The plasma according to claim 1, wherein the heat-generating component is connected to the heat radiating member by being slidably held by a holding member in a direction of coming into contact with and separating from the cover member. Display cooling structure.