JP2001035397A - Plasma display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce thermal stresses generated at image output time by providing a display panel and a heat transfer plate adhered within a specific range width area adjacent to an unheated part in the unheated part for forming the peripheral edge part and a heating part for displaying an image and transmitting heat to the unheated part from the heating part. SOLUTION: A heat transfer plate 6 is adhered to an area composed of a width of 20 mm to 100 mm adjacent to an unheated part 8 of a heating part 9 for heating, by displaying an image of a plasma display panel(PDP) 1. The PDP 1 is set as a light emitting part body of a rectangular plasma display device and uses a front glass plate for displaying the image and a reverse glass plate opposed to this is set as a main constitutive element. The heat transfer plate 6 is adhered to the reverse of the PDP 1, by using a pressure sensitive adhesive sheet or the like. Although the heat transfer plate 6 can use a metallic plate, and an aluminum plate, an aluminum alloy plate, a copper plate, a copper alloy plate and the like are desirable. An elastic body pressure sensitive adhesive sheet, such as a highly heat conductive silicone resin sheet, is desirable as the pressure sensitive adhesive sheet.

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 device in which the thermal stress of a plasma display panel (hereinafter abbreviated as PDP) is reduced to prevent the PDP from being damaged.

[0002]

2. Description of the Related Art FIG. 6 shows the structure of a conventional plasma display device, wherein (A) is a schematic top view of the entire plasma display device, (B) is a schematic rear view of the same, and (C).
FIG. 3 is a schematic structural view of a PDP portion. In the figure, 51 is a PDP, 52 is a rear cover, 53 is a fan, 55 is an air suction hole, 61 is a glass plate, 62 is a sealing portion, and 63 is a PDP.
Is a projection unit (hereinafter abbreviated as projection unit) on which an image is displayed.

[0003] The PDP 51 is generally composed of two glass plates 61 stacked on each other as shown in FIG. These two glass plates 61 are arranged in parallel with each other so as to keep a predetermined interval. Immediately inside the periphery of the portion where the glass plates 61 overlap, the entire periphery is sealed with a peripheral sealing member to form a sealed portion 62 that maintains confidentiality. A predetermined gas is filled in the area surrounded by the sealing section 62, and a projection section 63, which is a range where an image is displayed, is further inside the area surrounded by the sealing section 62. Is set.

[0006] A predetermined number of discharge electrodes are arranged in the projection section 63, and an image is displayed on the projection section 63. That is, a plasma discharge is generated between the discharge electrodes of the projection unit 63, thereby generating ultraviolet light, and the generated ultraviolet light is converted into visible light by the phosphor.
And this visible light is almost transparent PDP
The video is taken out from the front of 51. in this way,
In the plasma display device, a plasma discharge is used to display an image, and thus the projection unit 63 of the PDP 51 during operation generates a considerable amount of heat.

[0005] Since the heat generated by the PDP 51 is generated in accordance with an image, a high-power plasma display device, which has recently been used, generates a large amount of heat in a bright portion of the image, and this heat causes the PDP 51 to be heated to a high temperature. There was a point. For this reason, the plasma display device is devised for heat dissipation.

As one of them, Japanese Patent Application Laid-Open No. 9-22658 discloses a PDP 5 as shown in FIGS. 6 (A) and 6 (B).
1 discloses a plasma display device having a structure in which a rear cover 52 is provided to cover the back surface, and the inside of the rear cover 52 is forcibly ventilated by a fan 53, while circuit boards for an image projection operation are arranged outside the rear cover 52. .

However, in this conventional plasma display device, the rise in the temperature of the PDP 51 can be suppressed, but the rise in the temperature of the upper portion of the PDP 51 due to heat convection and the rise in the local temperature of a white portion having a large emission luminance are prevented. However, there is a problem that a local stress is generated in the PDP 51 and the sealing portion 62 is damaged.

Japanese Patent Laid-Open No. 10-116 discloses a plasma display device for preventing a local temperature rise of a PDP.
No. 036 discloses a PDP in which a metal having high thermal conductivity is adhered to substantially the entire back surface of the PDP via an elastic body having high thermal conductivity.
The entire surface is soaked and heat dissipation is promoted.
There is disclosed a plasma display device for preventing a local temperature rise.

However, in this conventional plasma display device, the temperature distribution of the PDP projection part which generates heat can be made uniform and the local temperature rise can be suppressed. However, when the temperature of the entire PDP is high, the glass PDP and metal Due to the bimetal structure constituted by the bonding of the plates, there is a problem that the PDP is greatly distorted and damaged by stress.

[0010]

In the above-mentioned conventional plasma display device, there is a problem that the sealing portion of the PDP is broken by the stress caused by the local temperature rise of the PDP. Further, in the above-described plasma display device capable of suppressing the local temperature rise of the PDP and making the temperature distribution uniform, there is a problem that the PDP is distorted or broken due to the bimetal structure.

The PDP breakage due to this heat generation will be described in more detail. The phenomenon that the sealing of the PDP is broken due to the heat generation of the PDP is a problem that the temperature of the PDP becomes high and a portion where the temperature rises remarkably and a portion where the temperature is not so high occur in the same panel. This temperature non-uniformity occurs between a portion where a bright image is displayed and a portion where the bright image is not displayed, and in particular, a temperature generated between a heating portion for displaying an image and a surrounding non-heating portion surrounding the heating portion. Is a problem. That is, there is no heat generation, and therefore, a large tensile stress is generated in the peripheral non-heat generating portion having a small thermal expansion due to thermal strain. Therefore, in order to prevent the PDP from being damaged, it is necessary to reduce the temperature difference between the heat-generating portion for displaying an image and the non-heat-generating portion around the heat-generating portion.

Also, the temperature rise of the whole PDP increases the thermal stress due to the restraint of the fixing member and causes PDP breakage. Therefore, in order to prevent the breakage of the PDP, the temperature of the whole PDP must be sufficiently cooled by sufficiently cooling the heat generating portion. It is necessary to suppress the rise and reduce the generated thermal stress.

[0013] In order to sufficiently cool the PDP, it is necessary to install a large number of cooling fans, but there arises a problem that noise due to ventilation increases. In addition, the installation of a large number of cooling fans increases the weight of the plasma display apparatus and increases the cost.

The present invention has been made to solve such a problem in the conventional apparatus, and provides a plasma display apparatus comprising a PDP in which thermal stress generated at the time of displaying an image is reduced and breakage is prevented. The purpose is to:

[0015]

According to a first aspect of the present invention, there is provided a plasma display apparatus comprising: a plasma display panel for displaying an image; a non-heat-generating portion forming an edge around the PDP; A heat transfer plate that is adhered to a region having a width of 20 mm or more and 100 mm or less adjacent to the non-heat generating portion in the heat generating portion that displays the image and generates heat, and that transmits heat from the heat generating portion to the non-heat generating portion. It is.

According to a second aspect of the present invention, there is provided the plasma display apparatus of the first aspect, wherein the plasma display apparatus is provided so as to cover substantially the entire back surface of the PDP, and is provided in the heat generating region of the PDP. At the position of the plate, a rear cover attached to the heat transfer plate, and a cooling fan and an intake hole for taking in air are provided in the rear cover.

According to a third aspect of the present invention, there is provided the plasma display device having the above-mentioned first configuration, wherein the PDP non-heat generating portion is provided with a heater for heating the non-heat generating portion.

A plasma display device according to a fourth configuration of the present invention includes a PDP for displaying an image and the PDP.
A heat transfer plate adhered to substantially the entire back surface and transmitting heat from the PDP heat-generating portion to the non-heat-generating portion; a rear cover installed over substantially the entire back surface of the PDP; a cooling fan provided on the rear cover; The rear cover is provided with intake holes that are opened on both lower and upper sides of the rear cover to take in air.

A plasma display device according to a fifth aspect of the present invention comprises a PDP for displaying an image, and a PDP for displaying an image.
A heat transfer plate adhered to substantially the entire back surface and transmitting heat from the PDP heat-generating portion to the non-heat-generating portion; a rear cover installed over substantially the entire back surface of the PDP; a cooling fan provided on the rear cover; An air intake opening is provided in the rear cover to take in air, and a mechanism provided in the rear cover for narrowing an air flow from the air intake toward the cooling fan.

The plasma display device according to a sixth aspect of the present invention is the plasma display device according to the fifth aspect, wherein a partition plate is formed in a C-shape in the rear cover as a mechanism for narrowing an air flow toward the cooling fan. This is a structure in which the flow path inside the rear cover is partially partitioned.

A plasma display device according to a seventh configuration of the present invention includes a PDP for displaying an image, and a PDP for displaying an image.
And the width 20 adjacent to the non-heat generating portion
a heat transfer plate adhered to a PDP heat generating area of not less than 100 mm and not more than 100 mm, a rear cover installed over substantially the entire back surface of the PDP, a cooling fan provided on the rear cover, and lower and upper portions of the rear cover It is provided with intake holes opened on both sides to take in air.

A plasma display device according to an eighth configuration of the present invention comprises a PDP for displaying an image and the PDP.
And the width 20 adjacent to the non-heat generating portion
a heat transfer plate adhered to a PDP heat generating area of not less than 100 mm and not more than 100 mm, a rear cover provided to cover substantially the entire back surface of the PDP, a cooling fan provided in the rear cover, and air opened in the rear cover. And a mechanism provided in the rear cover for narrowing the airflow from the intake hole toward the cooling fan.

A plasma display device according to a ninth configuration of the present invention is the plasma display device according to any one of the first to eighth configurations, wherein the PDP and the PD are disposed above and below a housing that is an exterior of the plasma display device.
A slit is provided in the gap between the filter panel and the filter panel installed on the front surface of P to allow air to enter and exit.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1A and 1B show a configuration of a plasma display device according to Embodiment 1 of the present invention, wherein FIG. 1A is a schematic cross-sectional view, and FIG. 1B is a schematic rear view without a rear cover. 2A and 2B show a configuration of a plasma display device according to Embodiment 1 of the present invention, wherein FIG.
(B) is a schematic longitudinal cross-sectional view. In the figure, 1 is PD
P, 2 a rear cover, 3 a cooling fan, 4 a housing, 5 a filter panel, 6 a heat transfer plate, 7 a heat insulating material, 8 a PD
P is a non-heat-generating portion (abbreviated as a non-heat-generating portion), 9 is a heat-generating portion (abbreviated as a heat-generating portion) of PDP, 10 is an intake hole, and 11 is a slit.

The PDP 1 is a main body of a light emitting portion of a rectangular plasma display device, and its main components are a front glass plate on which an image is displayed and a rear glass plate facing the front glass plate. The PDP 1 has a projection part where an image is displayed on the front glass plate and a part where the image is not displayed outside the projection part.

When an image is displayed on the projection unit, a plasma discharge occurs in the PDP, and accordingly, a considerable amount of heat is generated. Therefore, the area composed of the front glass plate and the rear glass plate corresponding to the projection part is defined as the heating part 9 of the PDP 1, and the area composed of the front glass plate and the rear glass plate corresponding to the non-projection part is defined as the non-heating part 9 of the PDP 1. The heating part 8 was defined.

In the first embodiment, the heat transfer plate 6 is adhered to the back surface of the PDP 1 using an adhesive member such as an adhesive sheet. The area to which the heat transfer plate 6 is adhered is the entire area of the non-heating section 8 of the PDP 1 and the heating section 9 adjacent to the non-heating section 8.
Is an area of 20 mm or more and 100 mm or less from the outer peripheral end of the above.

As the heat transfer plate 6, a metal plate having an appropriate thickness can be used, but an aluminum plate, an aluminum alloy plate, a copper plate, a copper alloy plate and the like are particularly preferable. However, it is not limited to these members as long as it has excellent thermal conductivity.

An adhesive sheet is used as an adhesive member of the heat transfer plate 6, and an elastic adhesive sheet such as a high heat conductive silicone resin sheet is particularly preferable. However, as long as the adhesive member of the heat transfer plate 6 has adhesiveness, a liquid adhesive, a sheet adhesive, or the like can be used, and the adhesive member is not limited to an adhesive sheet.

A rear cover 2 is provided on the rear surface of the PDP 1 so as to cover substantially the entire surface of the PDP 1. A metal plate is used for the rear cover 2 from the viewpoint of electric shielding properties, and particularly, a lightweight aluminum plate having excellent heat conductivity is preferable. The rear cover 2 is attached to the heat transfer plate 6 at the position of the heat generating portion, which is inside the outer periphery of the PDP 1. Examples of the attachment method include screwing, riveting, soldering, welding, and bonding. When the rear cover 2 is attached with an adhesive or an adhesive, the rear cover 2 is electrically connected to the heat transfer plate 6.

In the space covered by the rear cover 2, holding,
Nothing other than the purpose of cooling and temperature equalization, for example, a circuit board is provided.

A cooling fan 3 is attached to the rear cover 2 at the upper portion on the back surface thereof. The cooling fan 3 is a so-called axial fan, and functions to send out air in a region covered by the rear cover 2 to outside the region. A plurality of intake holes 10 for taking in the cooling air of the PDP 1 are provided in a lower portion of the rear surface of the rear cover 2. In FIG. 1, the shape of the intake hole 10 is round, but there is no limitation on the shape such as an ellipse, a quadrangle, and a triangle as long as air can be taken in.

The left, right, upper and lower ends of the PDP 1 are covered with a heat insulating material 7 made of, for example, styrene foam or a sponge-like resin, so that the PDP 1 is hardly affected by heat from the surroundings.

The housing 4 houses a filter panel 5, a PDP 1 to which a heat transfer plate is adhered, a rear cover 2 provided with a cooling fan, a heat insulating material 7, and the like. The housing 4 is provided with a plurality of slits 11 on its ceiling surface and bottom surface. The slit 11 is formed in a direction perpendicular to the projection surface of the PDP 1.

Next, the characteristic operation of the plasma display device of the present invention derived from such a structure will be described.

During operation of the plasma display device, the PD
The breakage of the sealing portion due to the temperature rise of P1 is due to the following causes.
When an image is displayed on the PDP 1, the distribution of power consumption in the projection plane changes according to the image. In particular, a bright portion of the image in the projection portion consumes a large amount of power, and the temperature of the portion locally rises and tends to expand thermally.

As a result, tensile stress (or tensile strain) is generated in a portion where the temperature rise is small and the thermal expansion is small. If this stress or strain becomes excessively large, P
The sealing portion of DP1 is broken, airtightness cannot be maintained, and the device does not function as a plasma display device. In particular, PD
If there is a large temperature gradient near the end of P1, stress will not be easily dispersed because the end itself is an open end, and a greater stress will be generated there.

In particular, heat is generated in the heat generating portion 9 where an image is displayed, and is not generated in the non-heat generating portion 8 outside the heat generating portion 9. Therefore, the vicinity of the boundary between the heat generating portion 9 and the non-heat generating portion 8 becomes a portion having a large temperature gradient, The seal is easily damaged. Therefore, escaping the heat in the portion where the temperature rise is large to the outside to suppress the temperature rise, and actively increasing the temperature in the portion where the temperature is originally low reduces distortion applied to the sealing portion of the PDP 1.

In the first embodiment, the heat transfer plate 6 made of aluminum makes thermal contact with the PDP 1 in the entire area of the non-heat-generating portion 8 at the edge of the PDP 1 and in a region having a certain width from the outermost periphery of the heat-generating portion 9. Adhered in good condition. Then, the non-heat-generating portion 8 is heated by heat transferred from the heat-generating portion 9 via the heat transfer plate 6, and the temperature of the non-heat-generating portion 8 approaches the temperature of the heat-generating portion 9. Is effectively suppressed. Even when the material of the heat transfer plate 6 is not aluminum itself but an aluminum alloy, the same effect can be obtained because it has a high thermal conductivity about 100 times that of glass.

The width of the heat transfer plate 6 in contact with the heat generating portion 9 (referred to as a heat transfer plate contact width) is preferably 20 mm or more and 100 mm or less. When the contact width of the heat transfer plate is less than 20 mm, the temperature gradient between the non-heat-generating portion 8 and the heat-generating portion 9 becomes large, and the thermal stress causes the PD.
The sealing of P1 is easily broken. As the contact width of the heat transfer plate increases, the temperature gradient between the non-heat-generating portion 8 and the heat-generating portion 9 decreases, but when the width is larger than 100 mm, the temperature gradient becomes almost constant and does not decrease any more.

Since the heat transfer plate 6 is not adhered to the central portion of the PDP, a temperature distribution is generated in this portion. However, in the central portion of the PDP, unlike the end portion, the partial stress generated by the temperature distribution is dispersed to the periphery. , It is difficult to break the seal of the PDP 1. Conversely, when the heat transfer plate 6 is adhered to the substantially front surface of the back surface of the PDP 1, a bimertal is formed by a difference in thermal expansion coefficient between the glass PDP 1 and the metal heat transfer plate 6, and the PDP 1 is heated to a high temperature. This causes a problem that the screen is distorted due to a large thermal distortion or the PDP 1 is damaged by thermal stress.

On the other hand, the fact that the heat transfer plate 6 is not adhered to the central portion of the PDP having a large area requires that the heat transfer plate 6 and the heat transfer plate 6 be bonded together.
The cost of the double-sided pressure-sensitive adhesive sheet for bonding to the DP1 can be reduced, and the weight of the plasma display device can be reduced.

The rear cover 2 is attached to the heat transfer plate 6 at the position of the heat generating area. Since the rear cover itself does not generate heat, it has substantially the same temperature as the cooling air flowing inside, and is lower than the temperature of the PDP 1 which generates heat. The fact that the rear cover 2 is attached to the heat transfer plate 6 at the position of the heat generating portion is as follows.
The cooling air cools only the heat generating portion 9 and does not cool the non-heat generating portion 8. In addition, since the temperature of the rear cover connecting portion is higher than that of the non-heat generating portion 8, heat of the non-heat generating portion 8 flows to the rear cover 2 and cooling of the non-heat generating portion 8 can be prevented. That is, the temperature gradient between the non-heat-generating portion 8 and the heat-generating portion 9 is prevented from increasing, and the generation of a large stress on the PDP 1 is suppressed.

A slit 11 is provided on the ceiling surface and the bottom surface of the housing 4. There is a gap between the PDP 1 and the filter panel 5, and the air in this gap is heated by the PDP 1 during projection and generates an upward airflow. That is, the housing 4
The external air is sucked in from the slit 11 on the bottom surface of the PDP 1 and discharged from the slit 11 on the ceiling surface, so that the PDP 1
The heat generated from the heat generating portion can be cooled. PD
Since the heat radiation ratio of P1 is the largest on the projection surface, such cooling of the projection surface suppresses the temperature rise of the heat generating portion 9 and prevents the temperature gradient between the non-heat generating portion 8 and the heat generating portion 9 from increasing. And
Generation of a large stress on the PDP 1 is suppressed.

Embodiment 2 The second embodiment is a further improvement of the plasma display device of the first embodiment. FIG. 3 is a schematic cross-sectional view showing a configuration of an improved portion in the second embodiment. In the figure, reference numeral 12 denotes a heater.

The heater 12 has a non-heat generating portion 8 at the edge of the PDP.
The rest is the same as in the first embodiment. The heater 12 has a tape shape or a linear shape. The heater 12 is divided, and the non-heat-generating portion 8 is heated by the control of the microcomputer according to the amount of heat generated by the heat-generating portion 9 so that a temperature gradient does not occur between this portion and the heat-generating portion 9. That is, generation of thermal stress at the end of the PDP 1 is suppressed, and breakage of the sealing portion is prevented.

Embodiment 3 FIG. 4 shows a configuration of a plasma display device according to Embodiment 3 of the present invention,
(A) is a schematic cross-sectional view, and (B) is a schematic rear view with a rear cover removed. In the drawing, reference numeral 13 denotes a hole (abbreviated as an upper intake hole) formed on both uppermost sides of the rear cover.

In the third embodiment, the heat transfer plate 6 is adhered to substantially the entire back surface of the PDP 1 using an adhesive member such as an adhesive sheet. As the heat transfer plate 6, a metal plate having an appropriate thickness can be used, but an aluminum plate, an aluminum alloy plate, a copper plate, a copper alloy plate or the like is particularly preferable. However, it is not limited to these members as long as it has excellent thermal conductivity.

A rear cover 2 is provided on the back of the PDP 1 so as to cover substantially the entire surface of the PDP 1. A cooling fan 3 is attached to an upper rear portion of the rear cover 2, and a hole formed almost uniformly is formed in a lower rear portion of the rear cover 2.
That is, the intake hole 10 is provided. In FIG. 4, the shape of the intake hole 10 is round, but there is no limitation on the shape such as an ellipse, a square, and a triangle as long as air can be taken in. In the third embodiment, a hole that is uniformly formed, that is, an intake hole, is also provided on both sides on the upper surface of the rear cover 2. This intake hole was designated as an upper intake hole 13 in particular. In FIG. 4, the shape of the upper intake hole 13 is round, but if air can be taken in, the shape is elliptical,
There is no limitation on the shape such as a quadrangle and a triangle.

A slit 11 is provided on the ceiling surface and the bottom surface of the housing 4. Others were the same as the first embodiment.

Since the heat transfer plate 6 is adhered to substantially the entire back surface of the PDP 1, the heat generating portion 9 reduces local heat generation.
The temperature is made uniform. In addition, the temperature gradient between the non-heat-generating portion 8 and the heat-generating portion 9 is also reduced, the stress at the end of the PDP is suppressed, and damage to the sealing portion is prevented.

When cooling the PDP 1, the external air is
This is performed by taking in the rear cover 2 from the upper intake holes 13 provided in one or two rows on both sides of the upper portion of the rear cover, and exhausting the air in the rear cover 2 from the cooling fan 3. At this time, when the number of cooling fans 3 is small, for example, even when there is only one cooling fan at the upper center of the rear cover rear surface, air flow is generated in each part of the rear cover by providing the upper intake hole 13 so that the entire back surface of the PDP 1 is completely covered. Cooled. That is, the PDP 1 is uniformly cooled as a whole, and the temperature rise is suppressed, so that large distortion and thermal stress generated by the bimetal structure are suppressed, and as a result, breakage of the PDP 1 is prevented.

There is a gap between the PDP 1 and the filter panel 5, and the air in this gap is heated by the PDP 1 during projection, and an updraft is generated. Therefore, external air is sucked in from the slit 11 provided on the bottom surface of the housing 4,
By being discharged from the slit 11 on the ceiling surface, the PD
The heat generated from the projection surface of P1 is cooled. Since the heat dissipation ratio of PDP1 is the largest on the projected surface, cooling this surface
The temperature rise of the entire DP1 is greatly suppressed, and damage due to distortion or stress generated in the PDP1 is further prevented.

In addition, since a single cooling fan 3 is used, noise during cooling can be suppressed, the weight of the plasma display device can be reduced, and the cost can be reduced.

Embodiment 4 FIG. 5 is a schematic inner surface of rear cover 2 showing the configuration of the plasma display device according to Embodiment 4 of the present invention. In the figure, reference numeral 14 denotes a plate (abbreviated as a partition plate) for dividing an air flow path in the rear cover.

In the fourth embodiment, the heat transfer plate 6 is adhered to substantially the entire back surface of the PDP 1 using an adhesive member such as an adhesive sheet. As the heat transfer plate 6, a metal plate having an appropriate thickness can be used, but an aluminum plate, an aluminum alloy plate, a copper plate, a copper alloy plate or the like is particularly preferable. However, it is not limited to these members as long as it has excellent thermal conductivity.

In the fourth embodiment, a partition plate 14 for partitioning the air flow path therein is provided in the rear cover 2. The partition plate 14 is installed in a C-shape, that is, the flow path is narrowed closer to the cooling fan. Partition plate 1
For 4, a metal plate such as aluminum or a plastic plate is used, and a light aluminum plate having excellent heat conductivity is preferable. However, the partition plate 14 is not limited to these materials as long as it can partition the inside of the rear cover.

A slit 1 is formed on each of the ceiling surface and the bottom surface of the housing 4.
1 is provided. Others were the same as the first embodiment.

Since the heat transfer plate 6 is adhered to substantially the entire back surface of the PDP 1, the heat generating portion 9 reduces local heat generation,
The temperature is made uniform. In addition, the temperature gradient between the non-heat-generating portion 8 and the heat-generating portion 9 is also reduced, the stress at the end of the PDP is suppressed, and damage to the sealing portion is prevented.

The partition plate 13 in the rear cover 2 is a PDP 1
The air flow is circulated to a place where the air flow is likely to be stagnant, such as the upper two sides, to cool the entire PDP 1 and suppress its temperature rise. That is, the suppression of the temperature rise of the PDP 1 reduces large distortion or thermal stress generated by the bimetal structure, and as a result, damage of the PDP 1 is prevented.

The slit 11 between the ceiling surface and the bottom surface of the housing 4
Cools the projection surface, greatly suppresses the temperature rise of the entire PDP 1, and further prevents the PDP 1 from being damaged by distortion or stress.

In addition, since one cooling fan 3 is used, noise during cooling is suppressed, and the weight of the plasma display device is reduced, and the cost is reduced.

Embodiment 5 In the fifth embodiment, in the plasma display device of the third embodiment, the heat transfer plate 6
Are all the non-heat-generating portions 8 on the back of the PDP and the non-heat-generating portions 8
20mm or more and 100m from the outer edge of the heat generating part 9 adjacent to
m or less in a region of less than m using an adhesive member such as an adhesive sheet.

In the fifth embodiment, the heat transfer plate 6 is
The heat is transferred from the heat generating portion 8 to the non-heating portion 8, the temperature of the non-heating portion 8 approaches the temperature of the heating portion 9, and the outer peripheral end of the heating portion 9 and the non-heating portion 8
To reduce the local temperature gradient.

The upper intake holes 13 provided on both sides of the upper rear surface of the rear cover 2 generate airflow in this area,
Cool both upper sides of DP. That is, the outer peripheral end of the heat generating portion 9 is cooled, the temperature rise in this portion is suppressed, and the local temperature gradient between the outer peripheral end of the heat generating portion 9 and the non-heat generating portion 8 is further reduced.

The slit 11 between the ceiling surface and the bottom surface of the housing 4
Cools the projection surface, greatly suppresses the temperature rise of the heat generating portion 9, and further reduces the local temperature gradient between the outer peripheral end portion of the heat generating portion 9 and the non-heat generating portion 8.

Further, since the cooling fan 3 is constituted by one unit, noise at the time of cooling is suppressed. The fact that the cooling fan is constituted by one unit and the heat transfer plate 6 is not adhered to the central portion of the PDP having a large area reduces the weight of the plasma display device and reduces its cost.

Embodiment 6 FIG. In the sixth embodiment, in the plasma display device of the fourth embodiment, the heat transfer plate 6
Is 100 mm or more from all the non-heat-generating portions 8 on the rear surface of the PDP 1 and the outer peripheral edge of the heat-generating portion 9 adjacent to the non-heat-generating portions 8.
mm or less with a bonding member such as an adhesive sheet.

In the sixth embodiment, the heat transfer plate 6 is
The heat is transferred from the heat generating portion 8 to the non-heating portion 8, the temperature of the non-heating portion 8 approaches the temperature of the heating portion 9, and the outer peripheral end of the heating portion 9 and the non-heating portion 8
To reduce the local temperature gradient.

The partition plate 14 in the rear cover can be used in places where air flow tends to stagnate, such as on both sides of the PDP.
Allow the air flow to flow around and cool both sides of the top of the PDP. That is, the outer peripheral end of the heat generating portion 9 is cooled, the temperature rise in this portion is suppressed, and the local temperature gradient between the outer peripheral end of the heat generating portion 9 and the non-heat generating portion 8 is further reduced.

The slit 11 between the ceiling surface and the bottom surface of the housing 4
Cools the projection surface, greatly suppresses the temperature rise of the heat generating portion 9, and further reduces the local temperature gradient between the outer peripheral end portion of the heat generating portion 9 and the non-heat generating portion 8.

Further, since the cooling fan 3 is constituted by one unit, noise at the time of cooling is suppressed. The fact that the cooling fan is constituted by one unit and the heat transfer plate 6 is not adhered to the central portion of the PDP 1 having a large area reduces the weight of the plasma display device and reduces its cost.

[0074]

The plasma display apparatus according to the first aspect of the present invention has a plasma display panel for displaying an image, a non-heat-generating portion that forms an edge around the PDP and has no heat generation, and an image for the PDP. 20 mm or more in width adjacent to the non-heat generating part in the heat generating part
A heat transfer plate that is bonded to an area of 0 mm or less and transmits heat from the heat generating portion to the non-heat generating portion,
Heat is transferred from the heat-generating part to the non-heat-generating part via the heat transfer plate,
The temperature of the non-heating portion approaches the temperature of the heating portion, effectively suppressing local temperature gradients, preventing damage to the sealing portion due to thermal stress, and not bonding the heat transfer plate to the center of the PDP, The material cost can be reduced, and the weight of the plasma display device can be reduced.

The plasma display device according to the second configuration of the present invention is the same as the plasma display device according to the first configuration, except that the plasma display device is provided so as to cover substantially the entire back surface of the PDP, and is provided in the heat generating region of the PDP. At the position of the plate, a rear cover attached to the heat transfer plate, and a cooling fan and an air intake hole for taking in air are provided in the rear cover to prevent the non-heating portion from being cooled, and It is possible to suppress a temperature gradient between the PDP sealing portion and the PDP sealing portion due to thermal stress.

A plasma display device according to a third configuration of the present invention is the plasma display device according to the first configuration, wherein a PDP non-heating portion is provided with a heater for heating the non-heating portion. It is possible to prevent a temperature gradient from occurring between the non-heat-generating portion and the heat-generating portion, suppress generation of thermal stress at the end of the PDP, and prevent damage to the sealing portion.

The plasma display apparatus according to the fourth configuration of the present invention comprises a PDP for displaying an image,
A heat transfer plate adhered to substantially the entire back surface and transmitting heat from the PDP heat-generating portion to the non-heat-generating portion; a rear cover installed over substantially the entire back surface of the PDP; a cooling fan provided on the rear cover; It is provided with air intake holes that are opened on both the lower and upper sides of the rear cover to take in air. The entire PDP is uniformly cooled and the temperature rise is suppressed, resulting in large distortion caused by the bimetal structure of the PDP. Alternatively, thermal stress can be suppressed to prevent breakage of the PDP.

The plasma display device according to the fifth configuration of the present invention comprises a PDP for displaying an image, and a PDP for displaying an image.
A heat transfer plate adhered to substantially the entire back surface and transmitting heat from the PDP heat-generating portion to the non-heat-generating portion; a rear cover installed over substantially the entire back surface of the PDP; a cooling fan provided on the rear cover; It is provided with an intake hole opened in the rear cover to take in air, and a mechanism provided in the rear cover to narrow the air flow from the intake hole toward the cooling fan, so that the entire PDP is uniformly cooled and the temperature rise is reduced. As a result, large strain or thermal stress generated by the bimetal structure of the PDP is suppressed,
P can be prevented from being damaged.

The plasma display device according to the sixth configuration of the present invention is the plasma display device according to the fifth configuration described above, wherein a partition plate is formed in a C-shape in the rear cover as a mechanism for narrowing the air flow toward the cooling fan. The PDP has a structure in which the flow path in the rear cover is partially partitioned, and the entire PDP is uniformly cooled and the temperature rise is suppressed, thereby causing a large distortion or thermal stress generated by the bimetal structure of the PDP. And PDP
Can be prevented from being damaged.

The plasma display device according to the seventh aspect of the present invention comprises a PDP for displaying an image, and a PDP for displaying an image.
And the width 20 adjacent to the non-heat generating portion
a heat transfer plate adhered to a PDP heat generating area of not less than 100 mm and not more than 100 mm, a rear cover installed over substantially the entire back surface of the PDP, a cooling fan provided on the rear cover, and lower and upper portions of the rear cover It is provided with air intake holes that are opened on both sides to take in air, effectively cooling the heat generating part and effectively suppressing local temperature gradients by transferring heat from the heat generating part to the non-heat generating part. By doing so, it is possible to prevent damage to the sealing portion due to thermal stress,
By not bonding the heat transfer plate to the center of the PDP, the material cost can be reduced and the weight of the plasma display device can be reduced.

The plasma display device according to the eighth configuration of the present invention comprises a PDP for displaying an image, and a PDP for displaying an image.
And the width 20 adjacent to the non-heat generating portion
a heat transfer plate adhered to a PDP heat generating area of not less than 100 mm and not more than 100 mm, a rear cover provided to cover substantially the entire back surface of the PDP, a cooling fan provided in the rear cover, and air opened in the rear cover. And a mechanism provided in the rear cover for narrowing the airflow from the intake hole toward the cooling fan. By effectively suppressing local temperature gradients by heat transfer to the PDP, it is possible to prevent breakage of the sealing portion due to thermal stress, and by not bonding the heat transfer plate to the center of the PDP,
The material cost can be reduced, and the weight of the plasma display device can be reduced.

A plasma display device according to a ninth configuration of the present invention is the plasma display device according to any one of the first and eighth configurations, wherein a PDP and the PD are provided above and below a housing which is an exterior of the plasma display device.
A slit that allows air to enter and exit is provided in the gap between the filter panel installed in front of P and PD.
PDP can be cooled effectively by taking in ambient air into the gap between P and the filter panel.

[Brief description of the drawings]

FIG. 1 shows a configuration of a plasma display device according to a first embodiment of the present invention, in which (A) is a schematic cross-sectional view,
(B) is a schematic rear view with the rear cover removed.

FIGS. 2A and 2B show a configuration of a plasma display device according to Embodiment 1 of the present invention, wherein FIG.
(B) is a schematic longitudinal cross-sectional view.

FIG. 3 is a schematic cross-sectional view showing a configuration of an improved portion of the plasma display device according to Embodiment 2 of the present invention.

4A and 4B show a configuration of a plasma display device according to Embodiment 3 of the present invention, wherein FIG.
(B) is a schematic rear view with the rear cover removed.

FIG. 5 is an inner schematic view of a rear cover showing a configuration of a plasma display device according to a fourth embodiment of the present invention.

6A and 6B show a configuration of a conventional plasma display device, wherein FIG. 6A is a schematic top view, FIG. 6B is a schematic rear view, and FIG.
1 is a schematic structural view of a PDP.

[Explanation of symbols]

1 PDP, 2 rear cover, 3 cooling fan, 4
Housing, 5 filter panel, 6 heat transfer plate, 7 heat insulating material, 8 non-heat generating part, 9 heat generating part, 10 intake hole, 11
Slit, 12 heater, 13 upper intake hole, 14 partition plate, 51 PDP, 52 rear cover, 53 fan, 55 air intake hole, 61 glass plate, 62 sealing part,
63 Projection Department

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Seki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Takao Kawauchiyama 2-3-2 Marunouchi, Chiyoda-ku, Tokyo 3 F term in Ryo Denki Co., Ltd. (reference) 5C040 MA13 5C094 AA32 AA33 BA31 FB20 JA08 5G435 AA12 BB06 GG21 GG44

Claims (9)

[Claims] 1. A plasma display panel (hereinafter abbreviated as PDP) for displaying an image, a non-heat-generating portion that forms no edge around the PDP, and a heat-generating portion for displaying and generating an image of the PDP. A plasma display device comprising: a heat transfer plate adhered to a region having a width of 20 mm or more and 100 mm or less adjacent to a non-heat generating portion and transmitting heat from the heat generating portion to the non-heat generating portion. 2. A rear cover attached to the heat transfer plate at a position of a heat transfer plate in a heat generating portion area of the PDP so as to cover substantially the entire back surface of the PDP, and a cooling fan and air are provided on the rear cover. The plasma display device according to claim 1, further comprising an intake hole for taking in air. 3. The plasma display device according to claim 1, wherein a heater for heating the non-heat-generating portion is provided in the non-heat-generating portion of the PDP. 4. A PDP for displaying an image, a heat transfer plate adhered to substantially the entire back surface of the PDP and transmitting heat from a PDP heating portion to a non-heating portion, and installed to cover substantially the entire back surface of the PDP. A plasma display device comprising: a rear cover; a cooling fan provided on the rear cover; and intake holes opened on both lower and upper sides of the rear cover to take in air. 5. A PDP for displaying an image, a heat transfer plate adhered to substantially the entire back surface of the PDP and transmitting heat from a PDP heating portion to a non-heating portion, and installed to cover substantially the entire back surface of the PDP. A rear cover, a cooling fan provided in the rear cover, an intake hole opened in the rear cover to take in air, and a mechanism provided in the rear cover to narrow an air flow from the intake hole toward the cooling fan. Characteristic plasma display device. 6. As a mechanism for narrowing the air flow in the direction of the cooling fan, a partition plate is arranged in a C shape in the rear cover,
6. The plasma display device according to claim 5, wherein the flow path in the rear cover is partially partitioned. 7. A PDP for displaying an image, a non-heating portion of the PDP, and a width of 20 mm adjacent to the non-heating portion.
A heat transfer plate adhered to the PDP heat-generating portion area of not less than 100 mm, a rear cover installed covering substantially the entire back surface of the PDP, a cooling fan provided on the rear cover, and a lower and upper part of the rear cover. A plasma display device comprising: a suction hole opened on a side to take in air. 8. A PDP for displaying an image, a non-heating portion of the PDP, and a width of 20 mm adjacent to the non-heating portion.
A heat transfer plate adhered to the PDP heat-generating area of not less than 100 mm, a rear cover installed over substantially the entire back surface of the PDP, a cooling fan provided on the rear cover, and air opened by the rear cover to remove air. A plasma display device, comprising: an intake hole to be taken in; and a mechanism provided in the rear cover to narrow an air flow from the intake hole toward the cooling fan. 9. A slit for allowing air to flow in and out of a gap between a PDP and a filter panel installed on the front of the PDP is provided above and below a housing that is an exterior of the plasma display device. Item 10. The plasma display device according to any one of Items 1 to 8.