JP2009157196A - Plasma display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma display apparatus such as a plasma display TV, which can suppress a temperature rise of the rear face of a housing compared to a conventional technology by making heat generated by a plasma display panel less likely to be transferred to the rear face of the housing. <P>SOLUTION: The plasma display TV includes: the plasma display panel 1 the front of which is a display screen; a heat dissipation member 3 disposed on the rear face of the plasma display panel 1 and dissipating heat generated by the plasma display panel 1, toward the inside of the face; and a heat insulation member 4 disposed on the rear face of the heat dissipating member 3 and restraining heat transferred to the heat dissipation member 3 from being transferred to the rear face of the housing. Thus, heat generated by the plasma display panel 1 is transferred to the heat dissipation member 3 and dissipated into atmosphere from the upper and lower parts of the housing 8. Moreover, since the heat insulation member 4 is provided, heat transferred to the heat dissipation member 3 is prevented from being transferred to a circuit board 6 and the rear face of the housing directly. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a plasma display device, and more particularly to a technique effective when applied to a heat dissipation structure in a plasma display device such as a thin plasma display television.

According to a study by the present inventor, for example, there is a technique described in Patent Document 1 regarding a heat dissipation structure of a plasma display television. In the technique of Patent Document 1, a hollow structure support is in close contact with a back surface of a plasma display panel via a bonding member. Inside the support, cooling fins are provided, and an intake port and an exhaust port are provided on the bottom surface and the top surface. And it has the structure which can cool a plasma display panel by moving air inside a hollow structure.
JP-A-11-52872

  By the way, as a result of examination of the present inventors regarding the heat dissipation structure of the plasma display television as described above, the following has been clarified.

  For example, as a heat dissipation structure in a conventional plasma display TV, there is a method in which a fan is provided on the back of the casing and the outside air is circulated through the casing by inhaling or exhausting. This is not possible because a sufficient space cannot be guaranteed behind the housing when making the best use of the arrangement.

  Moreover, in the technique of the said patent document 1, it is set as the structure which thermally radiates through the support body which has the hollow structure provided in the back surface of the plasma display panel, and also in this patent document 1, another air cooling and water cooling structure are disclosed. However, in any case, there is no means for preventing heat from the heat radiating member or the support on the back of the plasma display panel from being transmitted to the back of the casing.

  Especially in ultra-thin TVs, the space inside the housing is narrow and the distance between the plasma display panel and the back of the housing is short, so heat generated in the plasma display panel is easily transmitted to the back of the housing, making use of thinness such as wall mounting. When performing the arrangement, heat dissipation efficiency is poor, and heat generation on the back surface itself becomes a problem.

  Therefore, the present invention solves the above-mentioned problems, and its main purpose is to make it difficult for heat generated in the plasma display panel to be transmitted to the back side of the case, and to increase the temperature of the back side of the case compared to the prior art. An object of the present invention is to provide a plasma display device such as a plasma display television that can be suppressed.

  The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

  Of the inventions disclosed in the present application, the outline of typical ones will be briefly described as follows.

  That is, the outline of a typical one is that a plasma display panel whose front surface is a display surface, a heat dissipating member that is disposed on the back surface of the plasma display panel and dissipates heat generated in the plasma display panel in an in-plane direction, and this heat dissipation And a heat insulating member that is disposed on the back surface of the member and prevents heat conduction conducted to the heat radiating member to the back surface of the housing.

  Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

  That is, the effect obtained by a typical one is that heat generated in the plasma display panel is hardly transmitted to the back side of the casing, and the temperature rise on the back side of the casing can be suppressed as compared with the prior art. As a result, it is possible to prevent heat from accumulating on the back surface of the housing and thereby deteriorating the heat radiation characteristics or increasing the temperature of the back surface, so that the degree of freedom of the installation form of the thinned plasma display device can be increased.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

  In the embodiment of the present invention, a plasma display television will be described as an example of the plasma display device, but the present invention is not limited to this.

(Embodiment 1)
A plasma display television according to Embodiment 1 of the present invention will be described with reference to FIGS.

  FIG. 1 shows an example of a partial cross-sectional view for explaining a configuration from a panel to a circuit board in the plasma display television according to the present embodiment.

  In the configuration from the panel to the circuit board, a plasma display panel 1, an adhesive layer 2, a heat radiating member 3, a heat insulating member 4, a heat radiating member 5, a circuit board 6, and the like are provided.

  That is, the heat radiating member 3 that dissipates heat generated in the plasma display panel 1 in the in-plane direction is disposed on the back surface of the plasma display panel 1 whose front surface is the display surface. On the back surface of the heat radiating member 3, a heat insulating member 4 that suppresses heat conduction to the back surface of the housing from the heat conducted to the heat radiating member 3 is disposed. A heat dissipating member 5 that dissipates heat generated in the circuit board 6 disposed on the back surface in the in-plane direction is disposed on the back surface of the heat insulating member 4.

  For the heat radiating members 3 and 5, for example, a member made of a heat conductive material such as Al, Mg, or Cu having a high heat conductivity is used. For the heat insulating member 4, for example, a member made of a layer obtained by molding glass wool or a porous layer is used. For example, a material having excellent thermal conductivity is used for the adhesive layer 2.

  Thus, the heat radiating member 3 made of a heat conductive material is joined to the back surface of the plasma display panel 1 with the adhesive layer 2 having excellent heat conductivity, and the heat insulating member 4 is provided on the back surface of the heat radiating member 3. On the other hand, a heat radiating member 5 made of a heat conductive material is provided on the back surface of the heat insulating member 4, and the circuit board 6 is joined to the back surface of the heat radiating member 5.

  With such a configuration, heat generated in the plasma display panel 1 is radiated in the in-plane direction by the heat radiating member 3 through the adhesive layer 2, and heat conduction to the circuit board 6 side is suppressed by the heat insulating member 4. The heat generated in the circuit board 6 is radiated in the in-plane direction by the heat radiating member 5, and the heat conduction to the plasma display panel 1 side is suppressed by the heat insulating member 4.

  FIG. 2 shows an example of a cross-sectional structure of the plasma display television according to this embodiment.

  The plasma display television is composed of the panel to the circuit board described above, and includes the plasma display panel 1, the adhesive layer 2, the heat radiating member 3, the heat insulating member 4, the heat radiating member 5 and the circuit board 6, the front glass 7, and the housing 8. Etc. In addition, circuit components 9 constituting each circuit are mounted on the circuit board 6.

  On the front surface of the plasma display panel 1, a protective front glass 7, an ND filter, an EMI filter, and the like (not shown) are provided. The housing 8 is configured to support the outer periphery of the plasma display panel 1 provided with the front glass 7 and the like and cover the entire back surface of the plasma display panel 1. The heat dissipating member 3 is connected to the housing 8 at the top and bottom.

  Specifically, the plasma display panel 1 has a structure in which a front substrate and a rear substrate are bonded together, and a plurality of discharge cells are formed between them.

  In the front substrate, a plurality of pairs of sustain electrodes (X electrodes, Y electrodes) formed by combining a transparent electrode and a metal bus electrode are arranged in parallel on a glass substrate. The sustain electrode is covered with a dielectric layer and further covered with a protective film.

  On the other hand, the back substrate is formed on the glass substrate in a direction in which the address electrode intersects with the sustain electrode. The address electrodes are covered with a dielectric layer, and barrier ribs for partitioning discharge are formed thereon. Between the barrier ribs, three types of red (R), green (G), and blue (B) red phosphors, green phosphors, and blue phosphors are formed.

  In the plasma display panel 1 configured as described above, each intersection region with the address electrode is one pixel in the region sandwiched between the pair of the X electrode and the Y electrode of the sustain electrode, and the adjacent red (R), One set consists of three types of green (G) and blue (B).

  On the back surface of the plasma display panel 1, a circuit board 6 is provided via an adhesive layer 2, a heat radiating member 3, a heat insulating member 4, and a heat radiating member 5. On the circuit board 6, a drive circuit for driving each electrode of the plasma display panel 1, a control circuit for controlling the drive circuit, a power supply circuit for supplying power to these circuits, and the like are formed. A circuit component 9 constituting the circuit is mounted. This drive circuit includes an X electrode drive circuit that drives the X electrode of the sustain electrode, a Y electrode drive circuit that drives the Y electrode, and an address electrode drive circuit that drives the address electrode.

  In the plasma display panel 1 configured as described above, the X electrode drive circuit, the Y electrode drive circuit, and the address electrode drive circuit are driven by the control of the control circuit, and the drive voltage is applied to the X electrode, the Y electrode, and the address electrode. Thus, the selected cell can be discharged and displayed.

  In the display of the plasma display panel 1, heat generated in the plasma display panel 1 is radiated through the front glass 7 and is transmitted to the heat radiating member 3 on the back surface of the plasma display panel 1. Since the heat radiating member 3 is excellent in thermal conductivity and is connected to the housing 8 at the top and bottom, the heat transmitted to the heat radiating member 3 is radiated from the top and bottom of the housing 8 to the atmosphere. In addition, since the heat insulating member 4 is provided on the back surface of the heat radiating member 3, the heat of the plasma display panel 1 transmitted to the heat radiating member 3 is not directly transferred to the circuit board 6 side or the back surface of the housing. Temperature rise on the back of the body is suppressed.

  Therefore, according to the present embodiment, the heat generated in the plasma display panel 1 is not easily transmitted to the back side of the housing 8, and the temperature rise on the back surface of the housing 8 can be suppressed as compared with the prior art. Especially for thin plasma display TVs, the wall on the back, etc. is used to effectively utilize the space in the installation room, to maintain an appropriate viewing distance on a large screen, or to be used for wall hanging applications that make use of the thin type. In some cases, a sufficient distance cannot be maintained. According to this embodiment, even in such a case, it is possible to prevent heat from being accumulated on the rear surface of the housing, thereby deteriorating the heat radiation characteristics and increasing the temperature of the rear surface, and to increase the degree of freedom of the installation form of the thin-screen TV. it can.

(Embodiment 2)
A plasma display television according to Embodiment 2 of the present invention will be described with reference to FIG. The present embodiment is different from the first embodiment in that the heat radiating member on the back surface of the panel has a hollow structure having a heat radiating space therebetween.

  FIG. 3 shows an example of a cross-sectional structure of the plasma display television according to this embodiment.

  The plasma display television of this embodiment includes a plasma display panel 1, an adhesive layer 2, a heat radiating member 3a, a heat insulating member 4, a heat radiating member 5, a circuit board 6, a housing 8a, a circuit component 9, and the like.

  In particular, the heat dissipating member 3a of the present embodiment has a hollow structure having a heat dissipating space 11 therebetween, an exhaust fan 12 is attached to the upper part of the heat dissipating space 11, and a dustproof filter 13 is disposed below. Is attached. The mounting positions of the exhaust fan 12 and the dustproof filter 13 are not limited to this, and the exhaust fan 12 and the dustproof filter 13 can be mounted upside down or on the left and right.

  In FIG. 3, the front glass 7 or the like is not provided on the front surface of the plasma display panel 1, but it is also possible to provide the same as in the first embodiment. Further, since the front glass 7 or the like is not provided, the structure for supporting the plasma display panel 1 by the housing 8a is slightly different from that of the first embodiment. Others are the same as in the first embodiment.

  Therefore, according to the present embodiment, the heat generated in the plasma display panel 1 is transmitted to the heat radiating member 3 a on the back surface of the plasma display panel 1. Since the heat radiating member 3a is provided with the exhaust fan 12 at the upper part of the heat radiating space 11 and the dustproof filter 13 at the lower part, the heat transmitted to the heat radiating member 3a is absorbed by the outside air sucked from the lower part of the housing. The air flows to the top of the housing and is exhausted. In addition, since the heat insulating member 4 is provided on the rear surface of the heat radiating member 3a, the heat of the plasma display panel 1 transmitted to the heat radiating member 3a is not directly transmitted to the circuit board 6 side or the rear surface of the housing. Temperature rise on the back of the body is suppressed.

  In particular, in the present embodiment, in order to prevent heat from escaping to the back surface of the housing 8a, a structure in which the outside air is circulated as the heat radiating member 3a on the back surface of the plasma display panel 1 in response to a request to increase heat dissipation efficiency in the vertical and horizontal directions. By using this, the efficiency can be increased as compared with the first embodiment.

(Embodiment 3)
A plasma display television according to Embodiment 3 of the present invention will be described with reference to FIGS. The present embodiment is different from the second embodiment in that the hollow structure of the heat radiating member is divided in the vertical direction and the outside air is circulated through the respective divided spaces.

  FIG. 4 shows an example of the arrangement of the plasma display television panel according to the present embodiment and the heat dissipating members on the back surface thereof. 5 shows an example of the overall cross-sectional structure at the position indicated by the line AA ′ in FIG. 4, and FIG. 6 shows an example of the overall cross-sectional structure at the position indicated by the line BB ′ in FIG. Yes.

  As shown in FIG. 4, sustain electrode flexible leads 21 are connected to the left and right of the plasma display panel 1, and address electrode flexible leads 22 are connected to the lower part of the plasma display panel 1. As an example in FIG. 4, the sustain electrode flexible lead 21 is divided into two groups on the left and right sides, and the address electrode flexible lead 22 is divided into eight groups.

  As shown in FIGS. 5 and 6, the plasma display television of the present embodiment includes a plasma display panel 1, an adhesive layer 2, a heat radiating member 3b, a heat insulating member 4, a heat radiating member 5, a circuit board 6, a housing 8b, and a circuit. The component 9 is composed of a sustain electrode flexible lead 21, an address electrode flexible lead 22, and the like.

  In particular, the heat dissipating member 3b of the present embodiment has a hollow structure having a heat dissipating space as in the second embodiment. Further, as shown in FIG. 5, the heat dissipating member 3b has a hollow structure in the vertical direction. Each divided space 23 communicates with the outside air through the dust-proof filter 24 at the lower part of the casing through the space between the address electrode flexible leads 22.

  On the other hand, the divided spaces 23 divided in the vertical direction are respectively connected to the common space 25 at the upper part of the housing, and the common space 25 is an exhaust in the vertical direction provided outside the sustain electrode flexible lead 21 at the left and right ends. Connected to the space 26. At the lower end portion of the exhaust space 26, an exhaust fan 27 is provided that communicates with the outside of the housing.

  In the heat radiating member 3b, the dividing direction of the dividing space 23, the connection position of the common space 25 and the exhaust space 26, and the attachment position of the dustproof filter 24 and the exhaust fan 27 are not limited to this, and the address electrode flexible lead 22 is not limited thereto. Needless to say, it can be changed according to the position of the flexible lead 21 for the sustain electrode.

  Therefore, according to the present embodiment, the heat generated in the plasma display panel 1 is transmitted to the heat radiating member 3 b on the back surface of the plasma display panel 1. The heat dissipating member 3b has a divided space 23, a common space 25, and an exhaust space 26, and is provided with a dustproof filter 24 and an exhaust fan 27. Therefore, heat transferred to the heat dissipating member 3b is sucked from the lower part of the housing. The outside air is absorbed and flows to the upper part of the housing, and is exhausted through the common space 25 and the exhaust space 26. The common space 25 is in contact with the upper part of the casing, and the exhaust space 26 is in contact with the left and right sides of the casing. The heat generated in the plasma display panel 1 is efficiently generated from the upper and left and right sides of the casing by the flow of air in each space for heat dissipation. Heat is dissipated. In addition, since the heat insulating member 4 is provided on the back surface of the heat radiating member 3b, the heat of the plasma display panel 1 transmitted to the heat radiating member 3b is not directly transmitted to the circuit board 6 side or the back surface of the housing. Temperature rise on the back of the body is suppressed.

  In particular, in the present embodiment, by using a structure that divides in the vertical direction and distributes outside air as the heat dissipating member 3b on the back surface of the plasma display panel 1, the efficiency is increased as compared with the second embodiment. Is possible.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Needless to say.

  The plasma display device of the present invention is effective when applied to a thin plasma display television or the like. Further, a display device using a plasma display panel, an LCD television, an OLED television or the like in which the display panel is a heat source. It can also be used for a display device.

In the plasma display television by Embodiment 1 of this invention, it is a figure which shows an example of the fragmentary sectional view for demonstrating the structure from a panel to a circuit board. It is a figure which shows an example of the cross-section of the plasma display television by Embodiment 1 of this invention. It is a figure which shows an example of the cross-section of the plasma display television by Embodiment 2 of this invention. It is a figure which shows an example of arrangement | positioning of the panel of the plasma display television by Embodiment 3 of this invention, and the thermal radiation member of the back surface. FIG. 5 is a diagram illustrating an example of an overall cross-sectional structure at a position indicated by a line A-A ′ in FIG. 4. FIG. 5 is a diagram illustrating an example of an overall cross-sectional structure at a position indicated by a B-B ′ line in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Plasma display panel, 2 ... Adhesive layer, 3, 3a, 3b ... Heat radiation member, 4 ... Heat insulation member, 5 ... Heat radiation member, 6 ... Circuit board, 7 ... Front glass, 8, 8a, 8b ... Case, 9 ... circuit components,
11 ... Space for heat dissipation, 12 ... Fan for exhaust, 13 ... Filter for dust prevention,
DESCRIPTION OF SYMBOLS 21 ... Flexible lead for sustain electrodes, 22 ... Flexible lead for address electrodes, 23 ... Divided space, 24 ... Filter for dust prevention, 25 ... Common space, 26 ... Exhaust space, 27 ... Exhaust fan

Claims (5)

A plasma display device having a plasma display panel whose front surface is a display surface, and a housing configured to support an outer periphery of the plasma display panel and cover the back surface of the plasma display panel,
A heat dissipating member disposed on the back surface of the plasma display panel and dissipating heat generated in the plasma display panel in an in-plane direction;
A plasma display device, comprising: a heat insulating member disposed on a rear surface of the heat radiating member and deterring heat conduction to the rear surface of the housing of heat conducted to the heat radiating member. The plasma display device according to claim 1, wherein
The plasma display device according to claim 1, wherein the heat dissipating member has a hollow structure having a space for heat dissipation. The plasma display device according to claim 2, wherein
A plasma display apparatus, wherein an exhaust fan is attached to the first portion of the heat dissipation space, and a dustproof filter is attached to the second portion. The plasma display device according to claim 2, wherein
The hollow structure is divided in a first direction, and each divided space communicates with the outside air through a dustproof filter in the first portion of the housing through between the flexible leads for address electrodes.
Each of the divided spaces divided in the first direction is connected to a common space at the second portion of the casing, and the common space is provided outside the flexible lead for the sustain electrode at the third portion of the casing. A plasma display device, characterized in that an exhaust fan connected to an exhaust space and communicating with the outside of the housing is provided in a fourth portion of the exhaust space. The plasma display device according to claim 1, wherein
The plasma display device further comprising another heat dissipating member disposed on the back surface of the heat insulating member and dissipating heat generated on the circuit board disposed on the back surface in an in-plane direction.

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