JP2010139840A - Image display device and attaching metal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display device wherein deterioration in cooling performance caused by hanging the image display device on a wall can be suppressed. <P>SOLUTION: The image display device 1A has a back cover 4 forming a housing space between itself and the rear face of a chassis, and a partition 20 separating the housing space into a lower space and an upper space. The back cover 4 is provided with a first inlet 12 for introducing air into the lower space, a first outlet 13 for discharging air from the lower space, a second inlet 14 for introducing air into the upper space, and a second outlet 15 for discharging air from the upper space. Further, the image display device 1A has a hood 25 as a regulation member for regulating the flow of the air discharged from the first outlet 13 into the second inlet 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image display device that displays an image such as a television image.

  In recent years, image display devices that display images such as television images have become thinner, and image display devices that use so-called flat display panels such as plasma display panels or liquid crystal panels instead of conventional CRTs have become mainstream. .

  FIG. 10 is a perspective view of a plasma display device as an example of such a flat image display device as seen from the image display surface side. As shown in FIG. 10, the plasma display device 100 includes a front cover 3 and a back cover 4 that are composed of a plasma display panel (hereinafter referred to as “PDP”) 2 for displaying an image and a circuit board for driving the PDP 2. It is configured to cover.

  In the following description, the vertical direction refers to the vertical direction when the plasma display device is placed in a normal use state (ie, the vertical direction), and the horizontal direction refers to a direction orthogonal to this (ie, the horizontal direction). Let's refer to each.

  FIG. 11 is a schematic cross-sectional view showing an internal configuration of a conventional plasma display apparatus 100. As shown in FIG. 11, inside the front cover 3 and the back cover 4 of the plasma display apparatus 100, a PDP 2 for displaying an image, a chassis 5 that supports the PDP 2 on the front surface 5a, and a back surface 5b of the chassis 5 are attached. A plurality of circuit boards 6 for driving the PDP 2 are accommodated. That is, an accommodation space 11 for accommodating the circuit board 6 is formed between the back surface 5 b of the chassis 5 and the back cover 5.

  Here, the PDP 2 tends to become high temperature due to the operation principle of displaying an image using gas discharge. When the temperature of the PDP 2 becomes high, the electrical capacity of the electrodes formed inside the PDP 2 changes, causing a harmful effect such that normal discharge is not performed. Therefore, for the purpose of keeping the PDP 2 at a predetermined temperature (as an example, 70 to 80 ° C.) or less, as shown in FIG. 11, a resin sheet 7 having high thermal conductivity is sandwiched between the PDP 2 and the chassis 5. Things have been done. If it does in this way, the heat of PDP2 can be effectively transmitted to the chassis 5, and the effect of heat radiation and the effect of temperature equalization can be obtained simultaneously.

  Further, an intake port 8 is provided at the lower part of the back cover 4 and an exhaust port 9 is provided at the upper part, and a fan 10 is provided inside the back cover 4 at a position corresponding to the exhaust port 9. With the operation of the fan 10, an air flow as indicated by arrows A1 and A2 in FIG. 11 is generated between the storage space 11 inside the back cover 4 and the outside. Thereby, low-temperature air is sucked from the intake port 8, the chassis 5 and the circuit board 6 in the back cover 4 are cooled by forced convection, and high-temperature air is discharged from the exhaust port 9. Note that the intake port 8 and the exhaust port 9 are actually a collection of minute through-holes, but FIG. 11 shows only their positions roughly.

  Recently, the image display device has been further reduced in thickness (for example, about 25 mm), and the depth of the storage space 11 surrounded by the chassis 5 and the back cover 4 has become very small. Along with this, the gap between the intake surface facing the chassis 5 side of the fan 10 and the chassis 5 is also narrowed, and the flow rate resistance is increased, so that the air volume of the fan 10 is reduced. As a result, the cooling efficiency when the chassis 5 and the circuit board 6 in the back cover 4 are cooled by forced convection is deteriorated. As a method for suppressing deterioration in cooling efficiency, there is a method in which the storage space 11 inside the back cover 4 of the plasma display device 100 is divided into a plurality of regions, and cooling is performed by forced convection for each divided region. .

  A configuration in which the storage space 11 inside the back cover 4 of the plasma display device 100 is divided into a plurality of regions is shown, for example, in Patent Document 1, and this is shown in FIG. In the plasma display device 101 disclosed in Patent Document 1, the storage space inside the back cover 4 is divided into a plurality of regions in the vertical direction by the partition wall 20. In other words, the storage space is partitioned into the lower space 18 and the upper space 19 by the partition wall 20. The lower space 18 accommodates the circuit board 6b, and the upper space 19 accommodates the circuit board 6a. Further, the back cover 4 is provided with a first intake port 12 for introducing air into the lower space 18 and a first exhaust port 13 for discharging air from the lower space 18, and the upper space. A second air inlet 14 for introducing air into 19 and a second air outlet 15 for discharging air from the upper space 19 are provided. Further, in Patent Document 1, the fans 21 and 22 may be disposed at positions corresponding to the first exhaust port 13 and the second exhaust port 15 inside the back cover 4.

  In the plasma display apparatus 101 shown in FIG. 12, an air flow as indicated by arrows B <b> 1 and B <b> 2 in FIG. 12 is generated between the lower space 18 inside the back cover 4 and the outside due to the operation of the fan 21. Thereby, low-temperature air is sucked from the first air inlet 12, the chassis 5 and the circuit board 6 b in the lower space 18 are cooled by forced convection, and high-temperature air is discharged from the first air outlet 13. Further, due to the operation of the fan 22, an air flow as indicated by arrows C1 and C2 in FIG. 12 is generated between the upper space 19 inside the back cover 4 and the outside. Thereby, low-temperature air is sucked from the second air inlet 14, the chassis 5 and the circuit board 6 a in the upper space 19 are cooled by forced convection, and high-temperature air is discharged from the second air outlet 15.

  According to the above configuration, the distance between the intake ports 12 and 14 for sucking in the low temperature air and the exhaust ports 13 and 15 for discharging the high temperature air is shortened as compared with the conventional configuration shown in FIG. The fan becomes smaller and the load on the fan decreases. Thereby, deterioration of cooling efficiency can be suppressed.

By the way, in the configuration shown in FIG. 12, when the high-temperature air exhausted from the lower space 18 through the first exhaust port 13 is sucked into the upper space 19 from the second intake port 14, the chassis 5 in the upper space 19. There is a problem that the circuit board 6a cannot be sufficiently cooled. In order to avoid this, Patent Document 1 proposes a plasma display device 102 as shown in FIG. 13 as a third embodiment. In this plasma display device 102, the partition wall 20 is bent in a step shape, and the upper portion of the lower space 18 and the lower portion of the upper space 19 overlap in the left-right direction. The back cover 4 is provided with the second intake port 14 for the upper space 19 so as to be at the same height as the first exhaust port 13 for the lower space 18 or lower than that. .
JP 2008-9164 A

  Recently, as the device becomes thinner, so-called wall-hanging cases in which the image display device is attached to the wall surface are increasing in the home. When the plasma display device 102 shown in FIG. 13 is wall-mounted, it is assumed that the second air inlet 14 for the upper region 19 is at the same height as or lower than the first air outlet 13 for the lower space 18. However, since they are still close to each other, when the gap between the back cover 4 and the wall surface is narrowed (for example, 60 mm or less), the high-temperature air discharged from the first exhaust port 13 is directed to the second intake port 14. Inhaled. As a result, the cooling performance in the upper space 19 is deteriorated.

  An object of this invention is to provide the image display apparatus which can suppress the cooling performance deterioration accompanying wall hanging, and the attachment metal fitting used for this in view of the said problem.

  In order to solve the above problems, the present invention provides a display panel that displays an image, a chassis that supports the display panel on the front surface, a circuit board attached to the back surface of the chassis, and a back surface of the chassis. A back cover that forms a housing space for housing the circuit board, and a partition wall that partitions the housing space into a lower space and an upper space, and the back cover introduces air into the lower space. A first exhaust port for discharging air and a first exhaust port for discharging air from the lower space, and air from the second intake port and the upper space for introducing air into the upper space. The image display apparatus further includes a restricting member for restricting the air discharged from the first exhaust port from flowing into the second intake port. To.

  In the present invention, the storage space formed between the chassis and the back cover is partitioned into a lower space and an upper space by a partition wall, and air is introduced into the lower space in the back cover. A first exhaust port for exhausting air from the first intake port and the lower space, a second intake port for introducing air into the upper space, and a second exhaust port for exhausting air from the upper space A mounting bracket for mounting the image display device provided on the wall to the path for the air discharged from the first exhaust port and the second intake port between the back cover and the wall surface Provided is a mounting bracket in which a regulating member for separating a path for sucked air is integrally provided.

  According to the present invention, since high-temperature air discharged from the first exhaust port for the lower space is restricted from flowing into the second intake port for the upper space, the cooling performance is deteriorated even if the device is hung on the wall. Can be suppressed.

  The best mode for carrying out the present invention will be described below with reference to the drawings. The following description relates to an example of the present invention, and the present invention is not limited to these. In the following description, an image display device will be described using an example of a plasma display device as in the conventional example.

(First embodiment)
1 and 2 show a plasma display apparatus 1A according to a first embodiment of the present invention. The basic configuration of the plasma display device 1A is the same as that of the plasma display device 101 disclosed in Patent Document 1 shown in FIG. That is, the plasma display device 1A includes a PDP 2 that displays an image, a chassis 5 that supports the PDP 2 with a front surface 5a, a plurality of circuit boards 6a and 6b attached to the back surface 5b of the chassis 5, and a back surface 5b of the chassis 5. A back cover 4 that forms an accommodation space 11 that accommodates the circuit boards 6a and 6b, and a front cover 3 that forms a housing together with the back cover 4 are provided. The accommodating space 11 is partitioned into a lower space 18 and an upper space 19 by a partition wall 20. The lower space 18 accommodates the circuit board 6 b and the upper space 19 accommodates the circuit board 6 a. Yes.

  FIG. 2 is a diagram assuming a wall-mounted state in which the user is viewing, and the plasma display device 1 </ b> A is attached to the wall surface 24 by a mounting bracket 23. That is, the plasma display device 1 </ b> A of the present embodiment also includes a mounting bracket 23 that fixes the back cover 4 to the wall surface 24. In FIGS. 1 and 2, the mounting bracket 23 is simplified.

  The PDP 2 has a rectangular shape, and is generally arranged in a posture in which the longitudinal direction is the horizontal direction and the lateral direction is the vertical direction. Specifically, although not shown, the PDP 2 is configured by bonding a front glass substrate and a back glass substrate. The front glass substrate is formed with a large number of display electrode pairs composed of scan electrodes and sustain electrodes extending in the left-right direction, and the rear glass substrate is formed with a large number of address electrodes extending in the vertical direction.

  A resin sheet 7 with high thermal conductivity is sandwiched between the PDP 2 and the chassis 5 that supports the PDP 2. The area of the resin sheet 7 viewed from the front is substantially equal to the PDP 2 and is rectangular, and the thickness is, for example, about 1 to 2 mm. By interposing the resin sheet 7 between the PDP 2 and the chassis 5, the PDP 2 basically composed of a glass substrate and the chassis 5 that is a metal are brought into close contact with each other, and the heat conduction effect from the PDP 2 to the chassis 5 is enhanced. Yes. For this reason, as the material of the resin sheet 7, silicon or the like having both flexibility and thermal conductivity is suitable.

  The chassis 5 is a metal plate having a shape and an area almost equal to those of the PDP 2 as viewed from the front, and a thickness of, for example, about 1.5 mm. The role of holding the PDP 2 in the front cover 3 and the back cover 4 and supporting the whole, and the heat conducted from the PDP 2 through the resin sheet 7 is diffused in the in-plane direction of the chassis 5 itself to equalize the temperature. And plays a role of radiating heat to the lower space 18 and the upper space 19 between the chassis 5 and the back cover 4. For this reason, as the material of the chassis 5, aluminum having a good thermal conductivity is used.

  On the back surface 5b of the chassis 5, a power supply unit and a tuner unit for displaying an image, and further, a plurality of circuit boards 6a constituting a signal processing circuit and a drive circuit for displaying an image by giving a signal to an electrode of the PDP 2, 6b is attached in parallel to the PDP 2 by being screwed to the boss of the chassis 5.

  The front cover 3 and the back cover 4 are configured to cover the chassis 5 to which the PDP 2 and the circuit boards 6a and 6b are attached. The front cover 3 is made of, for example, aluminum having a thickness of about 1 mm, and the back cover 4 is made of, for example, steel having a thickness of about 0.5 mm. Among these, the front cover 3 also serves as an escutcheon frame that covers the periphery of the image display surface of the PDP 2. On the other hand, the back cover 4 has a main wall 41 that is separated from the back surface 5 b of the chassis 5 and faces the wall surface 24, and a rectangular cylindrical peripheral wall 42 that rises from the peripheral edge of the main wall 41.

  The main wall 41 of the back cover 4 is provided with a first intake port 12 for introducing air into the lower space 18 and a first exhaust port 13 for discharging air from the lower space 18. A second intake port 14 for introducing air into the upper space 19 and a second exhaust port 15 for discharging air from the upper space 19 are provided. Furthermore, fans 21 and 22 are disposed inside the back cover 4 at positions corresponding to the first exhaust port 13 and the second exhaust port 15.

  In the present embodiment, the first intake port 12, the first exhaust port 13, the second intake port 14, and the second exhaust port 15 are arranged in a straight line from the bottom to the top in this order. A column is provided. However, the number of the intake ports 12 and 14 and the exhaust ports 13 and 15 is not limited to this, and may be selected as appropriate, for example, one each.

  When viewed in individual rows, the second air inlet 14 is directly above the first air outlet 13. In other words, the second intake port 14 is at a higher position than the first exhaust port 13 and overlaps the first exhaust port 13 in the vertical direction. The first exhaust port 13 and the second exhaust port 15 have a substantially square shape, whereas the first intake port 12 and the second exhaust port 14 have the first exhaust port 13 and the second exhaust port. It has a rectangular shape that is wider and lower in height than the opening 15, and projects from both sides of the first exhaust port 13 and the second exhaust port 15.

  The partition wall 20 is made of resin or the like. The partition wall 20 preferably blocks substantial air movement between the lower space 18 and the upper space 19.

  The plasma display device 1 </ b> A according to this embodiment is different from the plasma display device 101 disclosed in Patent Document 1 shown in FIG. 12 in that a hood 25 is disposed in a space between the back cover 4 and the wall surface 24. It is a point. The hood 25 is attached to the main wall 41 of the back cover 4 by screwing or an engagement structure. The cross-sectional structure of the hood 25 is shown in FIGS. 2 (a) and 2 (b).

  The hood 25 covers a region of the main wall 41 of the back cover 4 extending from the second intake port 14 to a position below the first exhaust port 13 to form a channel that opens downward. In the center of the hood 25, a recess 25a is provided. The recess 25a has a depth that reaches the main wall 41 of the back cover 4, and the bottom is open. And the 1st exhaust port 13 is exposed by the hollow part 25a in the state which does not connect with the said flow path.

  A lower portion 25 b of the hood 25 than the hollow portion 25 a bulges toward the wall surface so as to contact the wall surface 24. The thickness of the lower portion 25 b is set to be the same as the distance between the back cover 4 and the wall surface 24. For this reason, the air discharged from the first exhaust port 13 is prevented from flowing downward. Further, the thickness of the upper portion of the hood 25 relative to the lower portion 25 b is set to about half the distance between the back cover 4 and the wall surface 24.

  Hereinafter, the mechanism of forced air cooling of the plasma display apparatus 1A of the present embodiment will be described with reference to FIG.

  As described above, in the plasma display device 1 </ b> A, the storage space 11 inside the back cover 4 is divided into upper and lower areas by the partition wall 20. As shown in FIG. 2A, air for cooling the plasma display device 1A is supplied from below the plasma display device 1A as indicated by an arrow a1. In cooling the lower space 18, outside air is taken from the first air inlet 12 as indicated by an arrow b 1, the chassis 5 and the circuit board 6 b are cooled, and the warmed air is sent from the first exhaust port 13 by the fan 21. It is discharged as shown by b2. In cooling the upper space 19, outside air is taken in from the second air inlet 14 as indicated by an arrow c 1, the chassis 5 and the circuit board 6 a are cooled, and the heated air is sent from the second air outlet 15 by the fan 22 to the arrow c 2. It is discharged as shown in. Finally, the heated air is discharged from the upper side of the plasma display device 1A as indicated by an arrow a2.

  Here, especially when the gap between the back cover 4 and the wall surface 24 when hanging on the wall is narrow, if there is no hood 25, the air discharged from the lower space 18 passes through the second air inlet 14 as it is. As a result, the air is sucked into the upper space 19 and the cooling efficiency of the upper space 19 is significantly deteriorated. The hood 25 is for preventing this deterioration, and the air discharged from the lower space 18 rises through the outside of the hood 25 and is discharged above the plasma display device 1A. On the other hand, as shown in FIG. 2B, the air for cooling the upper space 19 flows into the hood 25 from below the plasma display device 1A and passes through the hood 25 as indicated by an arrow c0. It is supplied from the second air inlet 14 to the upper space 19. That is, the hood 25 has a path for air discharged from the first exhaust port 13 and a path for air sucked into the second intake port 14 between the main wall 41 and the wall surface 24 of the back cover 4. It is separated. With such a hood 25, the air discharged from the lower space 18 is not directly sucked into the upper space 19 via the second air inlet 14, and deterioration of the cooling efficiency of the upper space 19 is suppressed. be able to. That is, the hood 25 constitutes a restricting member that restricts the air discharged from the first exhaust port 13 from flowing into the second intake port 14.

  The composition of the hood 25 is preferably made of a material having a low thermal conductivity such as a resin so that the hood 25 does not function as a heat exchanger. The plate thickness of the hood 25 is preferably as thin as possible from the same viewpoint, but is preferably about 1 mm in thickness from the viewpoint of strength.

  Thus, according to the plasma display device 1A of the present embodiment, it is possible to suppress deterioration in cooling performance even if the device is wall-mounted. Further, in the present embodiment, since the second intake port 14 is directly above the first exhaust port 13, the partition wall 20 can be formed into a simple shape such as a straight line extending in the left-right direction, and the manufacturing cost can be reduced. Can be reduced. Furthermore, since the lateral width of the intake ports 12 and 14 is larger than the lateral width of the exhaust ports 13 and 15, low temperature air taken from the intake ports 12 and 14 is brought into contact with the chassis 5 and the circuit boards 6a and 6b over a wide area. The heat dissipation efficiency can be improved.

  In the present embodiment, the form in which the hood 25 is attached to the main wall 41 of the back cover 4 is shown, but the hood 25 may be provided integrally with the attachment fitting 23. In order to provide the hood 25 integrally with the mounting bracket 23, they may be connected to each other by, for example, screwing or the like.

(Second Embodiment)
3 and 4 show a plasma display device 1B according to a second embodiment of the present invention. FIG. 4 is a diagram assuming a wall hanging state, as in the first embodiment. Since the basic configuration of the plasma display device 1B of the second embodiment is the same as that of the plasma display device 1A of the first embodiment, the same reference numerals are given to the same components in the second embodiment as in the first embodiment. A description thereof will be omitted. This also applies to the embodiments described later.

  The plasma display device 1B of the present embodiment is different from the plasma display device 1A of the first embodiment in that a duct 26 is disposed in the space between the back cover 4 and the wall surface 24 instead of the hood 25. Is a point. The duct 26 is attached to the main wall 41 of the back cover 4 by screwing or an engaging structure. The cross-sectional structure of the duct 26 is shown in FIG.

  The duct 26 extends upward from the first exhaust port 13 to the second intake port 14. Specifically, the duct 26 is formed of a bent pipe having both ends opened, one opening is connected to the first exhaust port 13, and the other opening is opened upward. In this case, the upper end of the duct 26 does not need to be so far away from the second air inlet 14 because the air discharged from the duct 26 rises as it is, but should be at least 100 mm above the second air inlet 14, for example. Is preferred.

  Hereinafter, the mechanism of forced air cooling of the plasma display apparatus 1B according to the second embodiment will be described with reference to FIG.

  As described above, in the plasma display device 1 </ b> B, the storage space 11 inside the back cover 4 is divided into upper and lower areas by the partition wall 20. Air for cooling the plasma display device 1B is supplied from below the plasma display device 1B as indicated by an arrow a1. In cooling the lower space 18, outside air is taken from the first air inlet 12 as indicated by an arrow b 1, the chassis 5 and the circuit board 6 b are cooled, and the warmed air is sent from the first exhaust port 13 by the fan 21. It is discharged as shown by b2. In cooling the upper space 19, outside air is taken in from the second air inlet 14 as indicated by an arrow c 1, the chassis 5 and the circuit board 6 a are cooled, and the heated air is sent from the second air outlet 15 by the fan 22 to the arrow c 2. It is discharged as shown in. Finally, the warmed air is discharged from above the plasma display device 1B as indicated by an arrow a2.

  Here, especially when the gap between the back cover 4 and the wall surface 24 when hanging on the wall is narrow, if there is no duct 26, the air discharged from the lower space 18 passes through the second air inlet 14 as it is. As a result, the air is sucked into the upper space 19 and the cooling efficiency of the upper space 19 is significantly deteriorated. The duct 26 is for preventing this deterioration, and the air discharged from the lower space 18 is discharged from the upper end of the duct 26 as shown by the arrow b3, and rises as it is and is discharged above the plasma display device 1B. Become so. Since the opening at the upper end of the duct 26 faces upward, the air discharged from the duct 26 does not flow downward. On the other hand, air for cooling the upper space 19 enters the space between the back cover 4 and the wall surface 24 from below the plasma display device 1b, and then is supplied to the upper space 19 from the second air inlet 14. That is, the duct 26 has a path for air discharged from the first exhaust port 13 and a path for air sucked into the second intake port 14 between the main wall 41 and the wall surface 24 of the back cover 4. It is separated. By such a duct 26, the air discharged from the lower space 18 is not directly sucked into the upper space 19 via the second air inlet 14, and deterioration of the cooling efficiency of the upper space 19 is suppressed. be able to. That is, the duct 26 constitutes a restricting member that restricts the air discharged from the first exhaust port 13 from flowing into the second intake port 14.

  The composition of the duct 26 is preferably made of a material having a low thermal conductivity such as a resin so that the duct 26 does not function as a heat exchanger. The thickness of the duct 26 is preferably as thin as possible from the same viewpoint, but is preferably about 1 mm in thickness from the viewpoint of strength.

  Thus, according to the plasma display device 1B of the present embodiment, the cooling performance deterioration can be suppressed even if the device is wall-mounted. Moreover, in this embodiment, the said effect can be acquired with the simple structure of the duct 26. FIG. Other effects are the same as those of the first embodiment.

  In the present embodiment, the form in which the duct 26 is attached to the main wall 41 of the back cover 4 is shown, but the duct 26 may be provided integrally with the attachment fitting 23. In order to provide the duct 26 integrally with the mounting bracket 23, they may be connected to each other by, for example, screwing or the like.

(Other embodiments)
Below, the example which comprised the regulating member which regulates that the air discharged | emitted from the 1st exhaust port 13 flows into the 2nd inlet port 14 with another duct or the partition plate is demonstrated.

  FIG. 5 shows a plasma display apparatus 1C according to the third embodiment of the present invention. In the plasma display device 1C, a duct 27 extending from the second intake port 14 to the lower side than the first exhaust port is provided.

  Specifically, the duct 27 is formed by a bent pipe having both ends opened, one opening is connected to the second air inlet 14 and the other opening is opened downward. In this case, the lower end of the duct 27 needs to be sufficiently separated from the second air inlet 14 because the air discharged from the duct 26 hits the wall surface 24 and is lower than the second air inlet 14 by, for example, 250 mm or more. It is preferable.

  Even in such a duct 27, between the main wall 41 and the wall surface 24 of the back cover 4, a path for air discharged from the first exhaust port 13 and a path for air sucked into the second intake port 14 are provided. Can be separated.

  FIG. 6 shows a plasma display device 1D according to a fourth embodiment of the present invention. In the plasma display device 1D, the partition wall 20 is bent at right angles at appropriate positions so as to form two peaks, and the first exhaust port for the lower space 18 across a portion where the partition wall 20 extends in the vertical direction. 13 and a second air inlet 14 for the upper space 19 are arranged. That is, the second intake port 14 is at the same height as the first exhaust port 13.

  A duct 26 similar to that of the second embodiment is connected to the first exhaust port 13. However, the duct 26 in this embodiment changes the flow direction of the air discharged from the first exhaust port 13 upward.

  Even in such a duct 26, between the main wall 41 and the wall surface 24 of the back cover 4, a path for air discharged from the first exhaust port 13 and a path for air sucked into the second intake port 14 are provided. Can be separated.

  In the fourth embodiment, the second intake port 14 may be at a lower height than the first exhaust port 14. It is also possible to provide the duct 26 integrally with the mounting bracket 23.

  FIG. 7 shows a plasma display apparatus 1E according to the fifth embodiment of the present invention. The plasma display device 1E has the same configuration as that of the fourth embodiment except that partition plates 28A to 28C are provided instead of the duct 26. The space between the main wall 41 and the wall surface 24 of the back cover 4 is partitioned by the partition plates 28A to 28C into the first exhaust port 13 side and the second intake port 14 side.

  In the present embodiment, the partition plates 28 </ b> A to 28 </ b> C have a space between the main wall 41 and the wall surface 24 of the back cover 4, a lower space facing the first air inlet 12 and the second air inlet 14, and a first space. The upper space which the exhaust port 13 and the 2nd exhaust port 15 face is divided up and down. Further, the partition plates 28A to 28C are provided integrally with the mounting bracket 23, and need not be individually attached to the apparatus. The height of the partition plates 28 </ b> A to 28 </ b> C from the back cover 4 is equal to the distance between the back cover 4 and the wall surface 24.

  Even in such partition plates 28 </ b> A to 28 </ b> C, between the main wall 41 and the wall surface 24 of the back cover 4, the path for air discharged from the first exhaust port 13 and the air sucked into the second intake port 14. Can be separated. That is, when the plasma display device 1E is attached to the wall surface 24 by the mounting bracket 23, a duct is formed by the partition plate 28A, the main wall 41 of the back cover 4, and the wall surface 24.

  FIG. 8 shows a plasma display apparatus 1F according to the sixth embodiment of the present invention. The plasma display device 1F includes the same partition plates 29A to 29D as in the fifth embodiment, but these partition plates 29A to 29D partition the space between the main wall 41 and the wall surface 24 of the back cover 4. The partitioning method is different.

  In other words, the partition plates 29 </ b> A to 29 </ b> D do not partition the space between the main wall 41 and the wall surface 24 of the back cover 4 in the vertical direction, but at the position between the first exhaust port 13 and the second intake port 14. In addition to partitioning, the first exhaust port 13 is vertically partitioned at a position near the lower side, and has an L shape.

  Even with such partition plates 29A to 29C, the same effects as those of the fifth embodiment can be obtained.

  FIG. 9 shows a plasma display device 1G according to a seventh embodiment of the present invention. In this plasma display 1G, the space between the main wall 41 and the wall surface 24 of the back cover 4 is a lower space facing the first air inlet 12 and the second air inlet 14 over substantially the entire width of the back cover 4. A partition plate 30 is provided in the upper space facing the first exhaust port 13 and the second exhaust port 15 so as to partition vertically while avoiding the mounting bracket 23. In other words, the partition plate 30 is formed by continuously connecting the partition plates 28A to 28C of the fifth embodiment.

(Modification)
In each of the above embodiments, the storage space is divided into two vertically by one partition wall 20, but the present invention has three or more storage spaces vertically by two or more partition walls 20. Needless to say, the present invention can also be applied to the case of partitioning.

  In the present invention, a plasma display device has been described as an example of a thin image display device. However, the present invention is also effective in reducing the temperature of a display panel when an image display device such as another liquid crystal display is mounted on a wall.

It is the perspective view which looked at the image display device concerning a 1st embodiment of the present invention from the back side. (A) is the IIA-IIA sectional view taken on the line of FIG. 1, (b) is the IIB-IIB sectional view taken on the line of FIG. It is the perspective view which looked at the image display device concerning a 2nd embodiment of the present invention from the back side. It is the III-III sectional view taken on the line of FIG. It is the perspective view which looked at the image display device concerning a 3rd embodiment of the present invention from the back side. It is the perspective view which looked at the image display device concerning a 4th embodiment of the present invention from the back side. It is the perspective view which looked at the image display device concerning a 5th embodiment of the present invention from the back side. It is the perspective view which looked at the image display device concerning a 6th embodiment of the present invention from the back side. It is the perspective view which looked at the image display device concerning a 7th embodiment of the present invention from the back side. It is the perspective view which looked at the conventional plasma display apparatus from the front side. It is sectional drawing of the conventional plasma display apparatus. 1 is a cross-sectional view of a plasma display device disclosed in Patent Document 1. FIG. It is a perspective view which shows the structure of the partition wall in the plasma display apparatus disclosed by patent document 1 as 3rd Embodiment.

Explanation of symbols

1A to 1G Plasma display device (image display device)
2 PDP (display panel)
DESCRIPTION OF SYMBOLS 3 Front cover 4 Back cover 41 Main wall 5 Chassis 5a Front surface 5b Rear surface 6a, 6b Circuit board 12 1st inlet port 13 1st exhaust port 14 2nd inlet port 15 2nd exhaust port 18 Lower space 19 Upper space 20 Partition wall 25 Hood (Regulator)
25a hollow part 26 duct (regulation member)
27 Duct (Regulator)
28A to 28C Partition plate (regulating member)
29A-29D Partition plate (regulating member)
30 Partition plate (regulating member)

Claims (11)

A display panel for displaying images,
A chassis that supports the display panel on the front surface;
A circuit board attached to the back of the chassis;
A back cover that forms an accommodating space for accommodating the circuit board between the rear surface of the chassis;
A partition wall that divides the storage space into a lower space and an upper space,
The back cover is provided with a first intake port for introducing air into the lower space and a first exhaust port for discharging air from the lower space, and air is supplied to the upper space. A second air inlet for introducing air and a second air outlet for discharging air from the upper space,
An image display device further comprising a restricting member that restricts air discharged from the first exhaust port from flowing into the second intake port. The image display device is attached to a wall surface,
The back cover has a main wall facing the wall surface, and the first exhaust port and the second intake port are provided on the main wall,
The restricting member separates a path for air discharged from the first exhaust port and a path for air sucked into the second intake port between the main wall and the wall surface of the back cover. The image display device according to claim 1, which is a device.   The image display device according to claim 2, wherein the second intake port is at a height position equal to or lower than that of the first exhaust port.   4. The image according to claim 3, wherein the restriction member includes a partition plate that partitions a space between the main wall and the wall surface of the back cover into the first exhaust port side and the second intake port side. Display device.   3. The image display device according to claim 2, wherein the second intake port is at a height position higher than the first exhaust port and overlaps the first exhaust port in a vertical direction.   The image display device according to claim 5, wherein a width of the second exhaust port is larger than a width of the first exhaust port.   6. The restricting member is configured by a duct extending downward from the second air inlet to the first exhaust port or a duct extending from the first air outlet to the upper side of the second air inlet. Or the image display apparatus of 6.   The restricting member is a hood that covers a region of the main wall of the back cover that extends from the second intake port to a position below the first exhaust port, and forms a flow path that opens downward. The image display device according to claim 7, comprising: a hood having a hollow portion that exposes an exhaust port in a state where the exhaust port does not communicate with the flow path.   The image display device according to claim 8, wherein a lower portion of the hood than the hollow portion bulges toward the wall surface so as to contact the wall surface. A mounting bracket for fixing the back cover to the wall surface;
The image display device according to claim 2, wherein the restriction member is provided integrally with the mounting bracket. A storage space formed between the chassis and the back cover is partitioned into a lower space and an upper space by a partition wall, and a first intake port for introducing air into the lower space and the back cover An image display provided with a first exhaust port for discharging air from the lower space, a second intake port for introducing air into the upper space, and a second exhaust port for discharging air from the upper space A mounting bracket for mounting the device on a wall,
A regulating member is provided integrally between the back cover and the wall surface to separate the path for air discharged from the first exhaust port and the path for air sucked into the second intake port. Mounting bracket.

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