JP2006343374A - Plasma display panel display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safe, highly reliable and long-life PDP display device which efficiently radiates the heat generated within the PDP display device. <P>SOLUTION: A heat storage member 18 composed of a container 14 housing a heat storage material 16 is placed between a PDP 12 having multifunctional filter 24 directly stuck to the front and a frame chassis 8 composed of a thermal insulating material. As a result, the heat storage member 18 absorbs the heat of the PDP and does not radiate the heat to the outside in the state that the power source of the PDP display device is put on and radiates the heat by taking a long time in the front direction of the PDP in the state that the power source is put off. Also, even if the surface of the multifunctional filter 24 is touched from the outside, a low-temperature burn does not occur and safety is assured and the PDP device having the high reliability and the long lifetime due to the small thermal impact on the PDP can be achieved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a plasma display panel display device, and more particularly to a heat dissipation measure during driving in the device.

  In recent years, a display device using a plasma display panel (hereinafter referred to as “PDP”) or a liquid crystal panel has been put into practical use as a large-screen, thin, and lightweight display device in a digital television, an information display device, and the like. In devices using these display panels, especially when the size is increased, a driving circuit, a control circuit, a power supply circuit, an image processing circuit, a TV tuner circuit, etc., in which a large panel and a large amount of electronic elements associated therewith are used. A lot of heat is generated. In order to stabilize the characteristics and extend the life of these display devices, studies to reduce the heat generated in the devices by reducing power consumption and by means of efficiently releasing the heat in the devices Has been made.

In the PDP, a plurality of matrix-like micro discharge spaces in which a discharge gas is sealed between two glass substrates and phosphors are provided are arranged. The phosphor is excited by ultraviolet rays generated by gas discharge in the minute discharge space, and visible light generated thereby is used for displaying information.
Due to this gas discharge, the PDP is heated to a considerably high temperature, and if it is severe, problems such as damage to the PDP and shortening of the service life occur. Also, by passing a large current through the electric circuit that drives and controls the PDP, high temperature heat is generated from electronic elements such as various transistors mounted on the circuit board, and the temperature inside the plasma display panel display device is significantly increased. There is a problem to raise. Various studies have been made to prevent this.

  For example, FIG. 7 shows a side sectional view of a plasma display panel display device (hereinafter referred to as “PDP display device”) using a conventionally used PDP. In the PDP display device 802, a front case 804 made of an organic resin and an aluminum (Al) rear case 806 are fixed at the peripheral end surface of the frame chassis 808 to form a casing. Further, the back surface of the PDP 810 is attached to the frame chassis 808 via a heat conductive sheet 812, and heat generated by gas discharge of the PDP 810 is thermally conducted to the frame chassis 808. On the other hand, various circuit boards 816 such as a drive circuit, a video circuit, a control circuit, a tuner circuit, and a power supply circuit that are electrically coupled from the PDP 810 by the wiring unit 822 to control light emission are mounted on the frame chassis 808 via the support unit 824. Distributed and fixed at each location. On these circuit boards 816, electronic components 814 such as transistors that allow a large current to flow are mounted, and heat is radiated from the circuit boards 816. In the back space 828 formed by the rear case 806, heat mainly conducted from the PDP 810 to the frame chassis 808 via the heat conductive sheet 812 and heat from the circuit board 816 are released by radiation, and the back space 828 is emitted. Heat the air inside. The heated air is taken in from the plurality of intake holes 820 formed in the rear case 806 by the fan 830 provided in the upper portion of the back space, and is discharged to the outside from the plurality of exhaust ports 818. In addition, vent holes 832 are formed in the rear case located above the various circuit boards 816 to cool by taking in air from the outside.

  On the other hand, the heat generated from the PDP 810 is also radiated to the front side. High-temperature heat is radiated in the direction of the opening on the front surface of the front case 804. Therefore, the PDP cannot be disposed directly on the front surface due to safety issues, and the multifunction filter 826 attached to the glass or acrylic plate that also serves as a protective panel is provided in the opening on the front surface of the front case 804. It is installed via the front space 834. That is, since there is an air space in the front space 834 between the multi-function filter 826 and the PDP 810, heat generated from the PDP 810 is hardly transmitted.

  In addition, since the multi-function filter 826 is provided independently on the front case 804, a substrate for self-supporting is required, and on a thick glass or acrylic plate so as to maintain sufficient strength against external impacts. Formed. In addition, since the light transmittance is low and reflected light is easily generated, there is a disadvantage that the weight is large and the cost is high, such as the need for an antireflection film on the back surface of the substrate. In order to solve these problems, a PDP display device in which a functional filter is pasted directly on the front surface of the PDP 810 has been proposed. That is, an antireflection film having a function of shielding electromagnetic waves or near-infrared rays is laminated on the glass breakage prevention layer, and a film-like filter for preventing glass breakage is configured with the other side as an adhesive surface. There has been proposed a PDP display device in which this is directly mounted on the front surface of the PDP via an adhesive surface (for example, Patent Document 1).

Furthermore, a surface film having an antireflection function including an antistatic layer and a near-infrared cut film are bonded together by a UV-absorbing transparent adhesive layer, and the transparent pressure-sensitive for bonding the near-infrared cut film to a PDP There has been proposed a direct attachment filter that is configured by bonding an adhesive (for example, Patent Document 2). According to this, it is stated that the leakage near infrared rays are sufficiently blocked by bonding to the glass surface of the PDP, and sufficient contrast can be obtained in a bright room.
Japanese Patent Laid-Open No. 2002-341776 JP 2002-189423 A

  However, in the configuration of the conventional PDP display device, even if the power of the fan is used, the heat released to the back space in the rear case accumulates in the upper part of the back space of the rear case. For this reason, specifically, the heat at a position of about 1/5 to 1/4 from the upper part of the height of the rear case is extremely high, and the temperature is lower at the lower part of the rear case. There is an unfavorable problem in terms of safety standards, such as reaching 60 ° C locally.

  On the other hand, in Patent Document 1 and Patent Document 2, the heat dissipation of the PDP display device is not studied, and if the directly attached filter is directly attached to the PDP surface of the PDP display device, the attached filter surface Becomes a high temperature due to heat generated from the PDP. Therefore, there are also unfavorable problems in terms of safety standards such as the risk of low-temperature burns compared to the conventional PDP display device.

Furthermore, in order to support a wall-mounted, embedded type, fanless PDP display device, the heat generated from the PDP is mainly radiated into the rear case as in the conventional PDP display device, and the heated air is discharged. A new heat dissipating method different from the heat dissipating method is required.
The present invention has been made to solve the above problems, and in particular, a PDP display capable of stable driving by dissipating heat generated in the PDP display device from the front side to the outside efficiently and safely. An object is to provide an apparatus.

In order to solve the above-mentioned problems, the present invention provides a plasma display panel display device in which a panel body is housed in a housing, and is made of a latent heat material so as to be thermally coupled to the panel body in the housing. It was set as the structure by which the thermal storage member which comprises the thermal storage material which becomes is arrange | positioned.
Here, the melting point of the latent heat material may be 45 ° C. or less. According to such a configuration, a safer PDP display device that does not cause low-temperature burns can be realized.

In addition, a multifunction filter may be disposed on the display surface of the panel body, and the heat storage member may be disposed on the back surface of the panel body.
Furthermore, the heat storage member is a plate-like body, and the first main surface is laminated and disposed so as to be thermally coupled to the panel body, and a heat reflecting layer is formed on the second main surface. It can also be configured.

Further, a plate-shaped frame chassis made of a heat insulating material for supporting the panel body is disposed inside the housing, and the heat storage member is disposed between the back surface of the panel body and the frame chassis. It can also be set as the structure pinched by.
Further, the frame chassis is made of a plate-like heat insulating material, and the heat storage member and the heat reflection layer are stacked between the back surface of the panel body and the frame chassis. It is also possible.

Here, a highly radioactive film may be formed on the front surface of the multifunction filter. According to such a configuration, it is possible to realize a PDP display device that emits heat as far-infrared rays and emits it from the front surface of the PDP at a wavelength that does not adversely affect the body.
Further, the heat storage member may be arranged at an upper part inside the housing. According to such a configuration, safety problems such as low-temperature burns can be greatly improved even when the conventional configuration is used or the upper part of the rear case is contacted.

  According to the PDP display device of the present invention having the above configuration, the PDP display device is turned on (during driving) by disposing a heat storage member including a heat storage material in at least a part of the housing. Then, when the temperature gradually rises and becomes equal to or higher than the melting point of the heat storage material, the heat at the portion where the heat storage member is disposed is absorbed and reduced, and is not released to the outside, and the temperature is reduced below the melting point. In addition, when the power source of the PDP display device is OFF, the stored heat is radiated from the heat storage member, and the temperature of the parts at the location where the heat storage member is disposed is reduced with a gentle gradient over a long period of time.

  As a result, the temperature of the part where the heat storage member is disposed is reduced below the melting point of the heat storage material, so that the temperature difference between the maximum temperature during operation and the room temperature can be kept small. As a result, there is no low-temperature burn even when touching the part where the heat storage member of the PDP display is provided from the outside, and the thermal shock to the above parts can be made extremely small, realizing a long-life PDP display. it can.

  Furthermore, according to the configuration in which the multifunction filter is disposed on the display surface of the panel body and the heat storage member is disposed on the back surface of the panel body, the temperature of the heat storage member is PDP when the power of the PDP display device is ON. When the temperature of the heat storage material becomes equal to or higher than the melting point of the heat storage material, the heat storage member absorbs the heat of the PDP and reduces the temperature of the PDP and the surface of the multifunction filter disposed on the surface to the vicinity of the melting point. Therefore, a PDP display device having a directly attached filter that is safe even when touching the surface of the multifunction filter can be realized. At the same time, the thermal shock to the PDP can be kept small by reducing the difference between the maximum temperature during operation and the room temperature. In addition, when the power is off, heat is released from the heat storage member, and while the PDP is warmed, the heat is applied to the PDP to decrease with a gentle gradient while maintaining the temperature higher than room temperature over a long time. Can be small. Therefore, it is possible to realize a highly reliable PDP display device that is stable with few cracks due to heat of the display panel and that there is little deterioration of the material constituting the PDP.

  Further, according to the configuration in which the heat reflection layer is formed on the surface of the heat storage member opposite to the surface adjacent to the PDP, the heat generated in the PDP is reflected by the heat reflection layer and effectively the heat storage member. To be absorbed. Further, when the generation of heat from the PDP stops and the heat storage member releases heat, the heat reflection layer effectively radiates heat to the front surface. Further, heat is not transferred to the back space formed by the rear case by the frame chassis made of the heat insulating material, and can be effectively radiated from the front side of the PDP display device. Therefore, it is possible to realize a PDP display device suitable for a wall-mounted type or an embedded type.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
The PDP display device according to the first embodiment of the present invention will be described in detail with reference to FIGS.
FIG. 1 is a perspective view showing an assembly structure of the PDP display device according to the first embodiment.

FIG. 2A shows a side cross-sectional view of the PDP display device in the same embodiment. FIG. 2B is an enlarged side cross-sectional view in which part of FIG. 2A is enlarged and the front side of the PDP display device is drawn upward.
FIG. 3 is a diagram showing operating characteristics regarding heat storage and heat dissipation of the PDP display device according to the embodiment.

The configuration and operating principle of the present invention will be described with reference to FIGS. 1, 2A, and 2B.
As shown in FIG. 1, in the PDP display device 2, a case 10 made of an organic resin front case 4 and an aluminum (Al) rear case 6 has a low thermal conductivity and excellent mechanical strength. The plate-like frame chassis 8 made of a heat-insulating material such as organic resin or glass is fixed by screws or the like in the peripheral notes of the plate-like frame chassis 8.

Further, on the back side of the back panel 20 of the PDP 12, as a feature of the present invention, a heat storage member 18 including a heat storage material 16 made of a latent heat material having a melting point such as sodium acetate contained in a container 14 such as polypropylene having a room temperature or higher. Is disposed.
A multi-function filter 24 is directly attached to the front side of the front panel 22 via an adhesive layer. The multi-function filter 24 is formed by laminating an antireflection film including an antistatic layer, an ultraviolet absorption layer, and a near infrared absorption layer on the surface of the front panel 22 of the PDP, and directly attaching the adhesive layer to the human body. It is arranged to prevent various radiations that may cause an obstacle and to obtain an excellent image.

In addition, it is not limited to arrange | positioning in the front surface of PDP by sticking the said multifunctional filter with an contact bonding layer, You may form in the PDP surface directly by sputtering or the apply | coating method.
Next, the operation principle of the present invention will be described. When the power of the PDP display device 2 is turned on, the heat generated by the gas discharge of the PDP 12 is heat-storing material 16 arranged on the back surface of the PDP 12 as shown in FIGS. 2 (A) and 2 (B). Accumulated as sensible heat. Along with this, when the temperature reaches the melting point of the heat storage material 16, it transitions from the solid phase to the liquid phase, and the heat storage material 14 absorbs latent heat. Accordingly, in the present invention, the surface temperature of the directly attached filter on the PDP is equal to or lower than the melting point of the heat storage material, and by selecting this melting point, the temperature at which low temperature burns do not occur even when the surface of the multifunction filter is touched (upper limit value) : Effective temperature that can be set below the maximum temperature that does not cause a problem even if touched.

  The upper limit is defined by the IEC (International Electrotechnical Commission): safety standards of the International Electrotechnical Commission, etc., with the temperature rise from the device operating temperature, and the non-metallic PDP has a temperature rise of 60 ° C. or less. It is prescribed. Therefore, if the room temperature is 20 ° C., the temperature is 80 ° C. or lower. Such a standard is not suitable for a safety standard that does not cause low-temperature burns, and it is necessary to define another standard. Therefore, various safety experiments were repeated, and it was found that the upper limit of the temperature at which low-temperature burn did not occur was 45 ° C. In the present invention, 45 ° C., which is stricter than general safety standards in Japanese companies, is defined as the upper limit value.

Hereinafter, the maximum value of the temperature in the power-on state will be referred to as the operating maximum temperature.
Therefore, the melting point adjustment including the heat storage material so that the surface temperature of the multi-function filter disposed at the front surface of the PDP is lower than the upper limit value, that is, the melting point of the heat storage material is 45 ° C. or less. It is preferable to adjust with an agent.

Further, when the power source of the PDP display device 2 is turned off, generation of heat due to gas discharge of the PDP 12 is stopped. Therefore, the heat storage material 16 releases the stored sensible heat and latent heat. That is, there is an effect that the temperature of the PDP 12 is decreased with a very gentle gradient with the passage of time and returned to room temperature over a long period of time.
A predetermined temperature that changes with time when the power is turned off and is higher than the room temperature is hereinafter referred to as a stop-time temperature. Therefore, when the power supply is turned on before returning to room temperature, the above-described operation is repeated in which the heat storage member again absorbs the heat generated by the gas discharge of the PDP again from the temperature when the power supply is turned off.

  Thus, in the power-off state, the temperature of the PDP decreases with a gentle gradient over a long period of time due to the heat radiated from the heat storage member. Therefore, since the temperature difference between the maximum temperature during operation and the temperature during stoppage can be reduced, the thermal shock to the PDP 12 is reduced. Further, the heat storage member 18 can keep the temperature uniform over the entire surface of the PDP 12, and since the thermal shock to the PDP 12 is small, the occurrence of cracking or distortion in the PDP 12 is greatly reduced. Further, there is an advantage that the lifetime of various constituent materials constituting the PDP is greatly improved. Furthermore, since the PDP gas discharge has a temperature-dependent characteristic, an environment with a small temperature difference between when the power is turned on and when the power is turned off is desirable, a stable gas discharge can be obtained, and a high-quality image can be obtained. .

  Furthermore, using FIG. 3, it demonstrates in detail regarding the operating characteristic which used sodium acetate as a heat storage material, for example. The average viewing time of PDP display devices includes the “Survey Report on Consumer Electronics Usage and Consumer Energy Consciousness Survey” (published in December 1992, Japan Association for Home Appliances) and “Broadcast Research and Survey (1993 2) According to “Month) Current Status of TV and Radio Viewing” (Japan Broadcasting Corporation, published in February 1993), it is reported that the rate is approximately 4.5 hours / day. Based on this, in order to confirm the effect of the heat storage member, an experiment was performed in a cycle of a longer power ON for 8 hours and an OFF state for 16 hours.

For comparison, a PDP display device of the present invention in which a directly attached filter is provided on the front surface of the PDP and a heat storage member is disposed on the back surface of the PDP, and a PDP display device in which a directly attached filter is provided on the front surface of the PDP and the heat storage member is removed as a reference example. The surface temperature of the directly attached multifunction filter was measured. The heat storage material had a melting point of 42 ° C. and a heat storage capacity of 184 kJ / kg, and the dimensions inside the container for storing the heat storage material were 5 mm (thickness) × 4692 cm ² (PDP area). The characteristic curve 42 shown with the dashed-dotted line of FIG. 3 observes the surface temperature of the direct attachment filter (multifunctional filter) of the reference example except a heat storage member with the infrared thermometer. When the power source of the PDP display device is turned on, the surface temperature of the multifunction filter gradually increases from room temperature (20 ° C.), reaches 55 ° C. exceeding the upper limit of 45 ° C., and becomes almost constant. When the power supply is further turned off after 8 hours, the surface temperature of the multifunction filter gradually decreases, and after 4 hours from the power supply off state, the original temperature returns to 20 ° C .. That is, a temperature difference from 20 ° C. to the maximum operating temperature of 55 ° C. of the characteristic curve is repeatedly added to the PDP. Moreover, the cycle which returns to 20 degreeC in a short time from the state of power supply OFF will be repeated.

  On the other hand, the characteristic curve 44 shown by the solid line of the present invention shows that the temperature rises from 20 ° C. (room temperature) and reaches the melting point of 42 ° C. of the heat storage material when the power of the PDP display device left for a long time is turned on. Then, it becomes substantially constant at the maximum operating temperature of 42 ° C., which is lower than the upper limit of 45 ° C. When the power supply is turned off after 8 hours, heat is released from the heat storage material, so that the surface temperature of the multi-function filter decreases toward room temperature with a gentle curve over 16 hours from the time when the power supply is turned off. Therefore, the temperature difference between the room temperature of 20 ° C. and the maximum operating temperature of 42 ° C. of the characteristic curve is repeatedly added to the PDP, and the thermal shock is greatly reduced compared to the PDP display device of the reference example. In addition, when viewing on the way, that is, when the power is turned on for 16 hours from the time when the power is turned off, the temperature rises from the temperature at the time of stopping, and a cycle that becomes constant at 42 ° C. is repeated. . Therefore, the thermal shock to the PDP is further improved.

In principle, the heat dissipation is performed so that the region A corresponding to the thermal energy surrounded by the characteristic curve 42 and the characteristic curve 44 in the power-on state is equal to the region B corresponding to the energy dissipated after the power is turned off. Is determined. Therefore, when the melting point is lowered and the region A increases, the temperature gradually approaches the room temperature with a gentler gradient.
Furthermore, for example, when the heat storage material has a melting point of 33.3 ° C. and the heat storage performance is extremely high and ideal, it absorbs a large amount of temperature from the PDP and gradually dissipates the heat so that the power is turned on and off. It has been found by the inventors that the temperatures of the PDPs are equal and operate on the characteristic line 43 of 33.3 ° C. theoretically. Thus, it has been found that the improvement of the heat storage member can further reduce the difference between the maximum temperature during operation and the temperature during stoppage.

  In addition to polypropylene, polymer materials such as polyethylene, polyethylene terephthalate, polyethylene naphthalate, nylon, polyimide, polyamide, and polycarbonate are effective for the container. In addition, it is more effective to use a material having excellent conductivity such as aluminum, copper, iron, and carbon. In order to use a metal material, it is effective to form a coating of a corrosion-resistant polymer material on the inner surface of the metal container by a method such as coating. Alternatively, it is preferable that the preservative is kneaded with the heat storage material and stored in the container. Moreover, although the example which uses sodium acetate as a heat storage material using a latent heat material was shown in this Embodiment 1, latent heat storage materials, such as sodium sulfate, calcium sulfide, sodium thiosulfate, and paraffin, are also effective. It is.

Returning to FIG. 2 again, the configuration of the first embodiment of the present invention will be described.
On the rear side of the frame chassis 8, various circuit boards 28 such as a drive circuit, a video circuit, a control circuit, a tuner circuit, and a power supply circuit that are electrically coupled from the PDP 12 by the wiring portion 26 to control light emission, support the support portion 30. And distributed and fixed to respective locations on the frame chassis 8. On these circuit boards 8, electronic components 32 such as transistors that pass a large current are mounted, and heat is radiated from the circuit boards 28. Heat from the circuit board 28 described above is radiated to the back space 34 formed by the rear case 6 to heat the air in the back space 34. Air is taken in from a plurality of intake holes 36 formed in the rear case 6 and radiated from the plurality of exhaust ports 38 to the outside by natural convection. The rear case located at the top of the various circuit boards 28 is configured to open a plurality of vent holes 40 to take in air from outside and cool it. Since the frame chassis 8 is made of a heat insulating material, heat generated by gas discharge of the PDP 8 is not easily radiated from the frame chassis to the back space 34. Accordingly, the temperature in the back space 34 is remarkably reduced, and it is not necessary to dispose a fan above the back space 34, and air in the back space can be released only by natural convection. Further, even if the upper part of the rear case 6 is touched, the safety point such as low-temperature burn is greatly improved.
(Embodiment 2)
The PDP display device according to the second embodiment will be described in detail with reference to FIG.

FIG. 4A shows a side sectional view of the PDP display device in the same embodiment of the present invention. FIG. 4B is an enlarged side cross-sectional view in which a part of FIG. 4A is enlarged and the front side is drawn upward.
The configuration and operation principle of the present invention will be described with reference to FIGS. 4 (A) and 4 (B). The same common elements as those in the first embodiment are denoted by the same reference numerals. Further, the difference from the first embodiment is that a highly reflective film 46 is formed on the surface of the heat storage member 18 opposite to the surface adjacent to the back panel 20 of the PDP 12. By configuring in this way, in the power-on state, the temperature of the heat storage material 16 rises due to the heat generated by the gas discharge from the PDP 12, and when the temperature becomes equal to or higher than the melting point of the heat storage material 16, the heat storage material 16 absorbs latent heat, Heat that cannot be absorbed is reflected by the highly reflective layer 46 and effectively collected and absorbed by the heat storage material 16. Further, in a state where the power is OFF, heat is radiated from the heat storage member 18 toward the PDP. At that time, the highly reflective layer 46 has an effect of efficiently radiating heat in the front direction. Furthermore, heat conduction to the rear case can be effectively blocked by the highly reflective layer 46 and the frame chassis 8 made of a heat insulating material. Therefore, heat can be effectively radiated to the front side of the PDP display device, and the temperature in the rear case of the PDP display device can be further reduced.

The higher the reflective layer, the higher the reflectivity, such as white metal or gold, and the higher the reflectivity, the more aluminum and silver thin films, bright nickel-chromium plating films, and bright nickel-gold plating films that are formed by vacuum deposition or sputtering. A membrane or the like is effective. Furthermore, it is also effective to dispose a galvalume steel plate (for example, manufactured by Bethlehemchill, USA).
In addition, since the description regarding the characteristic of a thermal storage material or a thermal storage member was already demonstrated in Embodiment 1, it abbreviate | omits.
(Embodiment 3)
The PDP display device according to the third embodiment will be described in detail with reference to FIG.

FIG. 5A shows a side sectional view of the PDP display device in the same embodiment of the present invention. FIG. 5B is an enlarged side cross-sectional view in which a part of FIG. 5A is enlarged and the front side is drawn upward.
The configuration and operation principle of the present invention will be described with reference to FIGS. 5 (A) and 5 (B).
The same reference numerals are assigned to the same common elements as in the first and second embodiments. Also, the main difference from the first embodiment is that a highly radioactive film 48 is formed on the front surface of the directly attached multifunction filter 24. Only differences from the first embodiment will be described below.

  When the PDP display device is ON, the heat storage member 18 absorbs heat from the PDP 12 as in the first embodiment, and reduces the surface temperature of the highly radioactive film 48 formed on the multifunction filter 24. When the power is OFF, the heat from the PDP 12 stops and the heat is radiated from the heat storage member 18. At that time, since the highly radioactive film reflects and scatters heat and emits it as far infrared rays having a wavelength of 4 μm or more, it may be emitted from the front surface of the PDP as radiation suitable for the body, rather than having a harmful effect on the body. A possible PDP display device can be realized.

In addition, it is necessary to select a material that does not affect the multifunction filter as a highly radioactive film because it is formed on the surface of the multifunction filter so as to be as transparent as possible. For that purpose, it is important to form Al ₂ O ₃ , SiO ₂ , ZrO ₂ , ZrSiO ₂ , SiO ₂ .Al ₂ O ₃ or the like into a thin film that can sufficiently transmit light by sputtering or vapor deposition. In addition, since it already demonstrated in Embodiment 1 about description of the characteristic of a thermal storage material or a thermal storage member, it abbreviate | omits.

Therefore, in the first to third embodiments, a safety condition that does not cause a problem such as low-temperature burn even when touching the PDP display device is satisfied, and since the thermal shock is small, it has a long life and reliability, and is fanless. Thus, a PDP display device with reduced noise and improved power consumption can be realized. Further, since heat is mainly released from the front side, it is suitable for a wall-mounted type or a buried type PDP display device.
(Embodiment 4)
A PDP display device according to the fourth embodiment will be described in detail with reference to FIG.

FIG. 6 shows a side cross-sectional view of the PDP display device in the same embodiment of the present invention. The configuration and operation principle of the present invention will be described. The same common elements as those in the first embodiment are denoted by the same reference numerals.
In the PDP display device 2, a front case 4 made of an organic resin and an aluminum (Al) rear case 6 are fixed at the peripheral end surface of the frame chassis 8 to form a housing 10. Further, the back surface of the PDP 12 is mounted on the frame chassis 8 via the heat conductive sheet 50, and heat generated by gas discharge of the PDP 12 is conducted to the frame chassis 8.

  On the other hand, various circuit boards 28 such as a drive circuit, a video circuit, a control circuit, a tuner circuit, and a power supply circuit that are electrically coupled from the PDP 12 by the wiring portion 26 to control light emission are mounted on the frame chassis 8 via the support portion 30. Distributed and fixed at each location. On these circuit boards 28, electronic components 32 such as transistors that pass a large current are mounted, and heat is radiated from the circuit boards 28.

  In the rear space 34 formed by the rear case 6, the heat thermally transmitted from the PDP 12 to the frame chassis 8 through the heat conductive sheet 50 and the heat from the circuit board 28 described above are released by radiation, and the rear space 34. Heat the air inside. The heated air is taken in from the plurality of intake holes 36 opened in the lower part of the rear case 6 by the fan 52 provided in the upper part of the rear space, and is discharged to the outside from the plurality of exhaust ports 38 opened in the upper part.

The rear case located above the various circuit boards 28 is provided with air holes 40 to cool by taking in air from the outside.
Furthermore, the heat storage member 54 including the heat storage material is disposed in close contact with the rear case at the upper portion of the rear case. When this heat storage member accumulates heat from the heated air accumulated in the upper part of the rear space formed by the rear case 6 and reaches the melting point of the heat storage material, the heat storage material undergoes a phase transition from the solid phase to the liquid phase, thereby causing latent heat. Accumulate. Therefore, the temperature of the close rear case becomes a temperature below the melting point, and even when touched from the outside, a low temperature burn can be prevented and a safe PDP display device can be realized.

In addition, as a position which arrange | positions a thermal storage member, it is preferable to provide in the position of 1/5-1/4 from the upper part of a rear case as mentioned above.
Moreover, since the description regarding the characteristic of a thermal storage material or a thermal storage member was already demonstrated in Embodiment 1, it abbreviate | omits.

  The display device according to the present invention is useful as a display device having a high heat dissipation effect, high reliability, and long life.

It is a perspective view which shows the structure of the PDP display apparatus in Embodiment 1 of this invention. It is (A) principal part sectional drawing which shows the structure of the PDP display apparatus in Embodiment 1 of this invention, (B) It is an enlarged side principal part sectional drawing. It is an operating characteristic diagram regarding the thermal storage and heat dissipation of the PDP display device in Embodiment 1 of the present invention. It is (A) principal part sectional drawing which shows the structure of the PDP display apparatus in Embodiment 2 of this invention, (B) It is an enlarged side principal part sectional drawing. It is (A) principal part sectional drawing which shows the structure of the PDP display apparatus in Embodiment 3 of this invention, (B) It is an enlarged side principal part sectional drawing. It is principal part sectional drawing which shows the structure of the PDP display apparatus in Embodiment 4 of this invention. It is side surface principal part sectional drawing which shows the structure of the conventional PDP display apparatus.

Explanation of symbols

2, 802 PDP display device 4, 804 Front case 10 Case 6, 806 Rear case 8, 808 Frame chassis 12, 810 PDP
DESCRIPTION OF SYMBOLS 14 Container 16 Thermal storage material 18, 54 Thermal storage member 20 Back panel 22 Front panel 24,826 Multifunctional filter 26,822 Wiring part 28,816 Circuit board 30,824 Support part 32,814 Electronic component 34,828 Back space 36,820 Intake hole 38, 818 Exhaust hole 40, 832 Vent hole 42 Characteristic curve 43 Characteristic straight line 44 Characteristic curve 45 Upper limit 46 High reflection layer 48 High radiation film 50, 812 Conductive sheet 52, 830 Fan 834 Front space

Claims (8)

A plasma display panel display device in which a panel body is housed in a housing,
A plasma display panel display device comprising: a heat storage member including a heat storage material made of a latent heat material so as to be thermally coupled to the panel body in the housing. The plasma display panel display device according to claim 1, wherein the latent heat material has a melting point of 45 ° C. or lower. A multifunction filter is arranged on the display surface of the panel body,
The said heat storage member is arrange | positioned at the back surface of the said panel main body. The plasma display panel display apparatus characterized by the above-mentioned. The heat storage member is a plate-like body, and the first main surface is laminated and disposed so as to be thermally coupled to the panel body, and a heat reflecting layer is formed on the second main surface. The plasma display panel display device according to claim 3. A plate-shaped frame chassis made of a heat insulating material for supporting the panel body is disposed inside the housing, and the heat storage member is sandwiched between the back surface of the panel body and the frame chassis. The plasma display panel display device according to claim 1, wherein the plasma display panel display device is provided. The frame chassis is made of a plate-like heat insulating material, and the heat storage member and the heat reflection layer are stacked between the back surface of the panel body and the frame chassis. The plasma display panel display device according to claim 4. The plasma display panel display device according to any one of claims 3 to 6, wherein a highly radioactive film is formed on a front surface of the multifunction filter. The plasma display panel display device according to any one of claims 1 and 2, wherein the heat storage member is disposed in an upper portion inside the housing.

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