JP2006330196A - Plasma television and video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma television and a video display device, wherein the reduction in display capability of a panel type display is prevented by a simple configuration and a front side of the display can be efficiently cooled. <P>SOLUTION: An open periphery of a space interposed between a display face 11 of a PDP 10 and an optical filter 80 is closed by a dust filter having permeability, so that air circulated in a cabinet can pass the space. As a result, not only a rear side of the PDP 10, a circuit, etc. but also the display face 11 and the optical filter 80 can be surely cooled. A user is protected from high temperatures even when touching the optical filter 80 from the front side of a plasma television 100. Since dust and dirt are prevented from flowing into the space by the dust filter while achieving cooling, the lifetime of a product is prevented from being reduced due to the reduction in display capability of the PDP 10 resulting from sticking of dust and dirt to the display face 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a plasma television and a video display device having a structure for cooling the inside of a housing.

Conventionally, a ventilation space is provided in front of the plasma display panel (PDP), a cooler is provided behind the circuit board on the back, a blower fan is provided below, and the air cooled by the cooler is blown into the housing by the blower fan. A technique for circulating and cooling the PDP and the circuit board is known (for example, see Patent Document 1).
JP-A-9-307257

In the above document, since the space between the tempered glass on the front surface of the PDP and the front surface of the housing is completely open, air circulates in the space, but dust and dust pass through the space at the same time, and the front surface of the PDP There was a problem that dust and dust would adhere and accumulate on the surface.
In addition, the above-mentioned document adopts a configuration in which a cooler is arranged in the housing and connected to a heat exhaust unit outside the housing, and the structure for cooling the PDP is very complicated.

  The present invention has been made in view of the above problems, and a plasma television and an image capable of preventing a decrease in display capability of a panel-type display and efficiently cooling the front side of the display with a simple configuration. An object is to provide a display device.

  In order to achieve the above object, a second aspect of the present invention provides an image display apparatus that cools the inside of a housing by allowing air to pass between the inside and outside of the housing that houses the panel-type display. By forming a ventilation hole and closing the space between the display surface of the panel type display and the optical filter attached to the front side of the housing with a dustproof filter having air permeability, the same space and the same space It is configured to be able to ventilate between the outside.

According to the second aspect configured as described above, air passes through the inside and outside of the housing because the vents are formed at predetermined positions of the housing. Moreover, the surroundings of the space sandwiched between the display surface of the panel type display and the optical filter attached to the front side of the housing are closed using a dustproof filter having air permeability. Therefore, the air circulating through the enclosure also passes through the space through the dustproof filter. As a result, it is possible to efficiently cool the display surface that tends to have heat during driving and the optical filter that faces the display surface with a predetermined gap.
In addition, dust and dirt can be prevented from entering and adhering to the display surface between the display surface and the optical filter.

  According to a third aspect of the present invention, in the video display device according to the second aspect, in the vicinity of the dust-proof filter that closes the space in one of the directions surrounding the space sandwiched between the display surface and the optical filter. An exhaust fan for discharging the air inside the housing to the outside is provided on the wall surface of the housing.

  If an exhaust fan is provided on the housing wall near the dust-proof filter that closes the space in one direction among the vertical and horizontal directions surrounding the space sandwiched between the display surface and the optical filter, this one dust-proof filter The air can be exhausted out of the housing by allowing air to pass from the space to the outside. As a result, an air circulation path in the enclosure including the space is formed to some extent, and the cooling efficiency is increased.

According to a fourth aspect of the present invention, in the video display device according to the third aspect of the present invention, at least the wall surface of the casing that continues from the periphery of the wall surface provided with the exhaust fan to the wall surface position where the dustproof filter near the exhaust fan is inscribed It has a non-ventable structure.
In this way, ventilation is not possible without forming a vent or the like on the casing wall surface around the exhaust fan and the dustproof filter in the vicinity of the exhaust fan. As a result, the air that has passed through the nearby dustproof filter is easily discharged to the outside of the housing by the exhaust fan. In other words, since the air whose temperature has risen through the space can be quickly discharged outside the casing, the cooling efficiency inside the casing is further increased.

  According to a fifth aspect of the present invention, in the video display device according to the fourth aspect, a partition plate for partitioning the space in the housing is provided so that one end thereof is substantially inscribed in the exhaust port of the exhaust fan, and the partition plate and the exhaust port are provided. A space surrounded by a part of the wall, the wall surface of the housing having the structure incapable of ventilation and the dust filter in the vicinity is formed. If such a space is created, the air that has passed through the dust-proof filter in the vicinity has no escape space except for a part of the exhaust port of the exhaust fan, so the air whose temperature has risen through the space is immediately discharged outside the body. The air circulation path is established.

  A sixth aspect of the present invention is the video display device according to any one of the third to fifth aspects, wherein the exhaust fan is provided in a direction surrounding a space sandwiched between the display surface and the optical filter. An air intake fan that feeds air into the housing from the outside is provided on the housing wall in a direction that opposes the housing, and among the above directions, the direction in which the exhaust fan is provided and the direction other than the direction that opposes the direction in which the exhaust fan is provided In this case, the space between the display surface and the optical filter is sealed with a member having no air permeability.

  That is, an exhaust fan is provided on one side and an intake fan is provided on the other side of the housing wall near each of the two dustproof filters provided in the opposite directions of the space between the display surface and the optical filter. Prepare. Further, in the direction other than the direction in which the exhaust fan is provided and the direction opposite to the direction in which the exhaust fan is provided, the space is closed with a member having no air permeability. As a result, the flow of air that passes through the space between the display surface and the optical filter in the vertical direction or the horizontal direction is reliably formed inside the housing, and the display surface and the optical filter can be efficiently cooled.

  According to a seventh aspect of the present invention, in the video display device according to the sixth aspect, the intake port of the intake fan is blocked by a dustproof filter having air permeability. If the air inlet itself is also covered with a dustproof filter, the dust and dust flowing into the housing can be significantly cut, and the deterioration of the panel display can be suppressed and the product life can be extended.

  Based on the above configuration, the invention of claim 1 is a plasma television that cools the inside of the housing by allowing air to pass between the inside and outside of the housing that houses the PDP. Ventilation holes are formed at multiple locations, and the left and right sides of the four directions around the space sandwiched between the display surface of the PDP and the optical filter attached to the front surface of the housing are closed with a dustproof filter that has air permeability. By sealing the direction with a non-breathable member, it is possible to ventilate between the space and the outside of the space, and the space is blocked in the upward direction of the space sandwiched between the display surface and the optical filter. An exhaust fan that exhausts the air inside the enclosure to the outside is provided on the enclosure wall surface in the vicinity of the dust filter, and at least the wall surface on which the dust filter is inscribed from the periphery of the wall where the exhaust fan is provided The wall surface of the chassis that continues to the position of the display is designed to be unventilated, and the partition plate that partitions the exhaust port of the exhaust fan from the inside of the housing is extended so as to reach the exhaust port from the back side of the display surface. A space surrounded by a part of the exhaust port, the wall surface of the non-ventilated structure and the dustproof filter in the upward direction is formed, and the space is closed in the downward direction between the display surface and the optical filter. A fan that sends air into the housing from the outside to the housing wall surface in the vicinity of the dust-proof filter is provided with an intake fan whose air inlet is closed by a dust-proof filter having air permeability.

  Needless to say, in such a more specific configuration, the same operations and effects as those of the inventions of claims 2 to 7 described above can be obtained.

  As described above, according to the present invention, it is possible to efficiently cool a display surface of a panel type display such as a PDP and an optical filter corresponding thereto without providing a cooler and the like. Prevents dust from sticking. Therefore, when the user touches the optical filter from the front side, it can be prevented that the temperature is high, and deterioration of the display capability of the display device due to dust or dirt can be prevented.

FIG. 1 is a simplified perspective view showing how a plasma television 100 according to the present invention is assembled.
In the figure, an optical filter 80, a front cabinet 30, and a PDP 10 are schematically shown in order from the front side to the back side. The front cabinet 30 is a frame-like member configured by an upper side 31, a lower side 31, a left side 32, and a right side 32, which are members having a predetermined width in the front-rear direction, and the PDP 30 is accommodated in the frame. The front cabinet 30 forms a television cabinet (hereinafter simply referred to as a cabinet) together with a rear cabinet 40, which will be described later. The cabinet includes a tuner circuit, a power supply circuit, a video / audio processing circuit, a panel drive circuit, etc. Each circuit necessary for a plasma television is accommodated.

  The optical filter 80 is fixed so as to be pressed from the front side by the fixtures 91 and 92 at the upper, lower, left and right edges on the front side of the front cabinet 30. The optical filter 80 is produced by a special glass material having conductivity, and exhibits an effect of shielding electromagnetic waves generated from the PDP 10 (shield effect) by covering the display surface 11 side of the PDP 10. In addition to the shielding effect, the optical filter 80 functions to improve image contrast and color reproducibility by the PDP 10.

  The PDP 10 is accommodated in the cabinet 30 while being supported by the two brackets 20 on the back side. Specifically, attachments 50 are fixed at four locations on the back, top, bottom, left, and right of the PDP 10, and each pair of attachments 50 divided into left and right sets is fixed to one bracket 20. Each of the two brackets 20 is connected to a stand member (not shown) that stands substantially vertically from the installation surface of the plasma television 100, thereby supporting substantially the entire plasma television 100 at a predetermined height. .

The front cabinet 30 is also fixed to the bracket 20. When the bracket 20 is connected to the PDP 10 via the attachment 50, the upper and lower end portions 22a and 22b are designed to extend outside the width in the vertical direction of the PDP 10. The end portions 22a, 22b of the front cabinet 30 are fixed to the upper side 31 and the lower side 31 of the front cabinet 30, respectively. Further, although omitted in FIG. 1, the rear cabinet 40 that covers the back side of the plasma television 100 is also fixed to the bracket 20.
That is, the front cabinet 30, the PDP 10, and the rear cabinet 40 are all fixed to the bracket 20. As a result, it is possible to prevent the front cabinet 30, the PDP 10, and the rear cabinet 40 from loading each other.

FIG. 2 shows a cross-sectional view of the plasma television 100 taken along the line AA in FIG. In FIG. 1, the attachment 50 and the bracket 20 are omitted, while the rear cabinet 40 is omitted in FIG.
An exhaust fan 120 is attached to a predetermined upper position on the inner wall of the rear cabinet 40. The exhaust fan 120 has an exhaust propeller that is rotated by a predetermined power such as a motor inside an exhaust port 121 provided substantially at the center thereof, and discharges air in the cabinet to the outside by rotating the propeller. A vent hole 41 penetrating the wall surface is formed in the wall surface of the rear cabinet 40 at a position where the exhaust fan 120 is attached, and air is discharged to the outside through the vent hole 41 and the exhaust port 121.
In addition to the position where the exhaust fan 120 is attached, the vent holes 41 are formed at a plurality of locations in the cabinet.

  The PDP 10 is fixed in the front cabinet 30 by a predetermined fixing means (not shown) with the display surface 11 facing the front side. On the back side of the PDP 10, the above-described circuit and the like (not shown) are disposed. Further, the optical filter 80 is attached to the front cabinet 30 from the front side as described above. In the present embodiment, an upper edge portion 31 a that is a part of the upper side 31 and extends inside the opening 33, and a lower edge portion 31 b that is a part of the lower side 31 and extends inside the opening 33, When pressing the upper and lower ends of the optical filter 80 with the fixture 92, the gasket 110 is interposed between the optical filter 80 and the upper edge 31a and the lower edge 31b. The gasket 110 is made of a conductive material such as a metal mesh, and exhibits a shielding effect by filling a gap between the optical filter 80 and the front side of the front cabinet 30. The gasket 110 is also sandwiched between the left and right end portions of the optical filter 80 and the left and right edge portions on the front side of the front cabinet 30. The fixtures 91 and 92 are fixed to the front cabinet 30 by screwing or the like.

  When the PDP 10 and the optical filter 80 are set as described above, a predetermined gap is provided between the optical filter 80 and the display surface 11 with the opening 33 of the front cabinet 30 interposed therebetween. Therefore, in the present invention, the gap is closed by sandwiching a dustproof filter having air permeability between the PDP 10 and the optical filter 80. More specifically, the space between the upper end of the display surface 11 and the inside of the upper edge portion 31a is closed with a dustproof filter 70a, and the space between the lower end of the display surface 11 and the inside of the lower edge portion 31b is closed with a dustproof filter 70b. Yes. Further, although not shown in the figure, a dustproof filter is also interposed between the left and right ends of the display surface 11 and the inside of the left and right edges on the front side of the front cabinet 30.

That is, the periphery of a space sandwiched between the PDP 10 and the optical filter 80 (hereinafter simply referred to as a space sandwiched between the PDP 10 and the optical filter 80) is blocked by the dustproof filter. Accordingly, the air can be moved between the space and the outside, and the inflow of dust and dust accompanying the movement of the air into the space is blocked.
As a result, as indicated by the arrows in the figure, in the cabinet, the air flowing in from each vent 41 passed not only through the space on the back side of the PDP 10 in which the circuit and the like are disposed, but also through the space. Above, it is discharged out of the cabinet by the exhaust fan 120. Therefore, it is possible to efficiently cool the display surface 11 and the optical filter 80 of the PDP 10 that easily has heat when the plasma television 100 is driven.

In the present invention, various measures are taken to increase the air circulation efficiency in the space.
The wall surface of the cabinet in a predetermined range including the periphery of the exhaust fan 120 and the portion where the upper dustproof filter 70a is inscribed has a sealed structure with no gap such as a vent except for the vent 41 on the back of the exhaust port 121. In the present embodiment, the wall surface of the cabinet above the two-dot chain line shown in FIG. As a result, the efficiency of collecting air by the exhaust fan 120 is increased, and the air that flows into the space via the lower or right and left dust-proof filters flows out from the space via the upper dust-proof filter 70a. An air flow is formed in which the air is forced out of the exhaust fan 120 before it diffuses again into the cabinet. That is, since the warmed air passing through the space is quickly discharged out of the cabinet, the cooling efficiency of the circuit and the like in the space is increased.

Moreover, you may provide the partition plate 60 which partitions space in the upper direction in a cabinet.
In the present embodiment, the partition plate 60 is provided so that one end of the partition plate 60 is substantially inscribed in the exhaust port 121 of the exhaust fan 120. More specifically, the partition plate 60 extends from the upper end portion on the back side of the PDP 10 toward the exhaust fan 120, and one end thereof substantially reaches the exhaust fan 120 so as to partition the substantial center of the exhaust port 121 vertically. Let FIG. 4 shows a state in which one end of the partition plate 60 has substantially reached the exhaust port 121.
As a result, a space surrounded by the partition plate 60, a part of the exhaust port 121, the wall surface of the cabinet having a sealed structure as described above, and the upper dustproof filter 70a is created.

  By providing the partition plate 60 in this way, the air that has flowed out of the space through the upper dustproof filter 70a has almost no escape space in the exhaust port 121, so that the air that has flowed out diffuses again into the cabinet. Without being exhausted, the exhaust fan 120 is surely discharged. As a result, an air circulation cycle is established in which air that has flowed into the space via the lower or right and left dustproof filters flows out of the space via the upper dustproof filter 70a and is exhausted. Cooling efficiency is further increased.

FIG. 3 is a cross-sectional view of the plasma television 100 taken along the line AA in FIG. 1, and shows a configuration example different from FIG. 3 is different from the cabinet shown in FIG. 2 in that an intake fan 130 is provided mainly at a predetermined position of the front cabinet 30.
As shown in the drawing, the intake fan 130 is attached inscribed on the wall surface of the cabinet below the PDP 10, that is, on the bottom surface of the front cabinet 30. The intake fan 130 has an intake propeller that is rotated by predetermined power such as a motor inside an intake port provided at substantially the center thereof, and feeds air outside the cabinet into the cabinet by rotating the propeller. Similarly to the case where the exhaust fan 120 is attached, a vent hole 42 penetrating the wall surface is formed on the wall surface of the front cabinet 30 to which the intake fan 130 is attached.

In the case where the intake fan 130 is provided, it is hermetically sealed with a member that does not have air permeability in the left and right directions among the directions around the space sandwiched between the PDP 10 and the optical filter 80. That is, the space between the left and right end portions of the display surface 11 of the PDP 10 and the inside of the left and right edge portions on the front side of the front cabinet is closed by a member that does not allow air to pass therethrough.
As a result, the air sucked into the cabinet by the intake fan 130 passes through the space from the bottom to the top through the lower dustproof filter 70b and the upper dustproof filter 70a, and the air after the passage passes through the space. An air circulation cycle is established in which the fan 120 is exhausted out of the cabinet. Therefore, by providing the intake fan 130, the display surface 11 and the optical filter 80 can be cooled more efficiently.

  When the intake fan 130 is provided, the dust filter may be attached to the intake port. As a result, when air is sucked into the cabinet by the intake fan 130, dust and dust are prevented from flowing into the cabinet.

  As described above, according to the present invention, since the open periphery of the space sandwiched between the display surface 11 of the PDP 10 and the optical filter 80 is closed by the dustproof filter having air permeability, the air circulating in the cabinet is affected by the air. It became possible to pass through the space. As a result, not only the back surface side of the PDP 10 and the above circuit, but also the display surface 11 and the optical filter 80 can be reliably cooled. In addition, since the optical filter 80 is cooled, even when the user touches the optical filter 80 from the front side of the plasma television 100, high temperature is prevented. Furthermore, in order to prevent the inflow of dust and dust into the space by the dustproof filter while realizing the cooling, the dust and dirt adhere to the display surface 11 and the display capability of the PDP 10 is lowered, and the product life is shortened. Is prevented.

The perspective view which showed the assembly of the plasma television. The longitudinal cross-sectional view of the plasma television concerning an example. The longitudinal cross-sectional view of the plasma television concerning other examples. The figure which showed a part of exhaust fan and a partition plate.

Explanation of symbols

10 ... PDP
DESCRIPTION OF SYMBOLS 11 ... Display surface 20 ... Bracket 30 ... Front cabinet 31 ... Upper side, lower side 31a ... Upper edge part 31b ... Lower edge part 32 ... Left side, right side 33 ... Opening 40 ... Rear cabinet 41, 42 ... Vent 50 ... Attachment 60 ... Partition Plates 70a, 70b ... dustproof filter 80 ... optical filters 91, 92 ... fixture 100 ... plasma television 110 ... gasket 120 ... exhaust fan 121 ... exhaust port 130 ... intake fan

Claims (7)

In a plasma television that cools the interior of the enclosure by passing air between the inside and outside of the enclosure that houses the plasma display panel,
Form vents at multiple locations on the back side of the housing,
Of the four directions surrounding the space sandwiched between the display surface of the plasma display panel and the optical filter attached to the front side of the housing, the vertical direction is closed with a dustproof filter having air permeability, and the left and right directions are air permeable. It is possible to ventilate between the same space and the outside of the same space by sealing with no member,
An exhaust fan for exhausting the air inside the housing to the outside is provided on the housing wall surface in the vicinity of the dustproof filter that closes the space above the space between the display surface and the optical filter,
At least the frame wall surface that continues from the periphery of the wall surface where the exhaust fan is provided to the wall surface position where the upward dustproof filter is inscribed has a structure incapable of ventilation,
A partition plate that partitions the exhaust port of the exhaust fan from the inside of the housing extends so as to reach the exhaust port from the back side of the display surface to the exhaust port. And a space surrounded by the upward dustproof filter,
A fan that sends air into the housing from the outside to the housing wall near the dust-proofing filter that closes the space between the display surface and the optical filter in the downward direction. A plasma television characterized by an intake fan blocked by a filter. In a video display device that cools the interior of the enclosure by allowing air to pass between the inside and outside of the enclosure that houses the panel display,
A ventilation hole is formed at a predetermined position of the casing, and a space between the display surface of the panel display and the optical filter attached to the front side of the casing is closed with a dustproof filter having air permeability. A video display device characterized in that ventilation is possible between the space and the outside of the space. An exhaust fan that exhausts the air inside the housing to the outside is provided on the housing wall surface in the vicinity of the dust-proof filter that closes the space in one of the directions surrounding the space sandwiched between the display surface and the optical filter. The video display device according to claim 2, wherein 4. The video display according to claim 3, wherein at least a housing wall surface extending from the periphery of the wall surface provided with the exhaust fan to a wall surface position in contact with a dustproof filter in the vicinity of the exhaust fan has a structure incapable of ventilation. apparatus. A partition plate for partitioning the space in the housing is provided so that one end thereof is substantially inscribed in the exhaust port of the exhaust fan, the partition plate, a part of the exhaust port, the wall surface of the non-ventilated structure, and the dustproof filter in the vicinity. The video display device according to claim 4, wherein a space surrounded by is formed. An intake fan that feeds air into the enclosure from the outside is provided on the enclosure wall surface in a direction opposite to the direction in which the exhaust fan is provided among the directions surrounding the space sandwiched between the display surface and the optical filter. In directions other than the direction in which the exhaust fan is provided and the direction opposite to the direction in which the exhaust fan is provided, the space sandwiched between the display surface and the optical filter is sealed with a non-breathable member. The video display device according to claim 3, wherein the video display device is a video display device. The video display device according to claim 6, wherein an intake port of the intake fan is blocked by a dustproof filter having air permeability.

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