JP2010178215A - Display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display unit that has a disk drive unit, suppresses temperature increase in the disk drive unit due to the heat from a cabinet, and is configured to sufficiently cool the disk drive unit. <P>SOLUTION: A display apparatus includes: a display portion 1 having a display face 11a at the front, a cabinet 2 that covers the back side of the display portion 1, a disk drive unit 41 provided at the back side of the cabinet 2, and a cover 42 that covers the back side of the disk drive unit 41. The display apparatus is configured to generate natural convection in the cabinet 2. In a back cabinet 22, a communication hole 26 is provided that communicates inside of the cabinet 22 and inside of the cover 41. A natural convection in the cabinet 2 causes the air in the cover 42 to be sucked to the inside of the back cabinet 22 from the communication hole 26, to cool the disk drive unit 41 by the convection generated around. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device including a device that reads and / or writes information on an information recording medium.

  A display device such as a liquid crystal display device or a plasma display device has a display unit having a display surface for displaying an image on the front side, a power supply circuit component arranged on the rear side of the display unit and supplying power to the display unit, and a display unit And an electronic component such as a drive circuit component for driving the display, and a cabinet for housing the display unit and the electronic component. The cabinet includes a front cabinet that is a front division that surrounds the peripheral portion of the display unit from the front side, and a back cabinet that is a rear division that covers the rear side of the display unit.

  In recent years, display devices are becoming larger and thinner. Along with this, the gap between the heat generating component inside the display device and the cabinet becomes narrow, the inside of the cabinet tends to become high temperature, and there is a possibility of adversely affecting the electronic components and the like. For this reason, in order to suppress the temperature rise inside the display device due to the heat from the heat-generating components, generally, an intake port is provided at the lower part of the back cabinet and an exhaust port is provided at the upper part of the back cabinet, and natural convection (or It is configured to be air cooled by forced convection. Note that the heat generating component is an electronic component such as a power supply circuit component in the plasma display device, and is provided on the rear side of the display panel having the display surface of the display unit in the liquid crystal display device, and emits light to the display panel. These are electronic components such as a light source to be irradiated, a power supply circuit component, and a drive circuit component for driving the light source.

  In parallel with the increase in size and thickness, a large number of multifunctional display devices having functions of peripheral devices have been commercialized. As such a display device, a DVD having a playback function or a recording / playback function for reading from and / or writing to an information storage medium such as a DVD (digital video disk), an HDD (hard disk drive), or a BD (Blu-ray disc), There is a display device incorporating a disk device such as an HDD or a BD device. When the disk drive unit, which is the main body of the disk device, is built in the display device, various layouts can be considered. It is aesthetically preferable to incorporate the display device so as to maintain the size of the front view of the display device relative to the display surface dimensions. In this case, the disk drive unit is disposed in the back cabinet of the display device. However, the disk drive unit includes a pickup unit that reads and writes signals on the disk with high accuracy using a laser or the like, and this pickup unit has a lower heat-resistant temperature than other components. For this reason, a display device configured to cool the disk drive unit has been proposed (see, for example, Patent Document 1).

  In the display device disclosed in Patent Document 1, a disk drive unit is attached to the rear surface of a chassis that supports the rear side of the display unit, and air is sucked into a lower part of a back cabinet that constitutes a cabinet that covers the disk drive unit and the rear side of the display unit. Each has an exhaust port at the top and a through hole in the portion of the chassis facing the disk drive unit so that a ventilation path from the intake port to the exhaust port through the through hole is formed. It is configured. As a result, natural convection occurs inside the back cabinet, particularly around the disk drive unit, due to heat from the heat-generating components inside the display device, and the disk drive unit is cooled by this natural convection. Therefore, the heat dissipation structure for cooling the disk drive unit is reduced. It can be realized at a cost.

JP 2007-110200 A

  By the way, with the progress of thinning in recent years, display devices having a thickness of 10 cm or less are also increasing. In such a display device, the heat generating components in the display device are arranged closer to each other in the front-rear direction. For this reason, for example, when the ambient temperature is 35 ° C., the temperature inside the back cabinet may reach about 70 ° C., and the temperature of the back cabinet may reach about 60 ° C. On the other hand, the pickup part of the disk drive unit, for example, has a product whose heat resistant temperature capable of maintaining the performance is 60 ° C.

  For this reason, in the display device according to Patent Document 1 in which the disk drive unit is arranged inside the back cabinet, the temperature inside the back cabinet rises to about 70 ° C. due to the temperature rise of the heat generating components when the display device is used. However, the temperature of the disk drive unit also rises due to heat transfer from the chassis or radiant heat, and the temperature of the pickup part exceeds the heat-resistant temperature, so that the operating conditions of the disk drive unit cannot be satisfied.

  Therefore, it is conceivable to dispose the disk drive unit on the rear side of the back cabinet that is cooler than the inside of the back cabinet of the display device. However, in order to reduce the thickness of the display device, the disk drive unit must be provided close to the rear surface of the back cabinet, and the temperature of the back cabinet may reach about 60 ° C. as described above. There is a possibility that the temperature of the temperature exceeds the heat resistance temperature.

  The present invention has been made in view of such circumstances, and includes a disk drive unit, which is configured to suppress a temperature rise of the disk drive unit due to heat from the cabinet and to sufficiently cool the disk drive unit. An object is to provide a display device.

  A display device according to the present invention includes a display unit having a display surface on the front side, a cabinet that covers the rear side of the display unit, and a rear side of the cabinet, and performs reading and / or writing on an information recording medium. A display device comprising: a disk drive unit; and a cover that covers a rear side of the disk drive unit, wherein natural convection is generated inside the cabinet, wherein the cabinet includes the interior of the cabinet and the cover. A communication hole that communicates with the inside is provided.

  In the present invention, there is provided a communication hole that communicates the inside of the cabinet that covers the rear side of the display unit and the inside of the cover that covers the rear side of the disk drive unit provided on the rear side of the cabinet. When the display device is in use, the air in the cabinet heated by the heat from the heat generating components in the display device rises and natural convection occurs. Due to the natural convection inside the cabinet, the air inside the cover is sucked out from the communication hole into the cabinet, so that the disk drive unit can be cooled.

  In the display device according to the present invention, it is preferable that a through hole is provided in the cover so as to be separated from the communication hole.

  In the present invention, the cover is provided with a through hole spaced apart from the communication hole, and air inside the cover is sucked out from the communication hole to the inside of the cabinet, while air outside the display device is inside the cover. Since the convection flowing from the through hole is generated inside the cover, the disk drive unit can be sufficiently cooled.

  The display device according to the present invention includes a chassis that is provided inside the cabinet and supports the display unit from the rear side, and at least one of the cabinet and the chassis has a protrusion protruding toward the other. It is preferable that the portion is provided in the vicinity of the communication hole.

  In the present invention, at least one of the chassis that is provided inside the cabinet and supports the display unit from the rear side, and the cabinet is provided in the vicinity of the communication hole. Therefore, the ventilation path, which is a natural convection passage, is narrowed at the portion where the convex portion is provided, and in this narrow portion, the flow of the natural convection becomes faster and the pressure decreases. As a result, since the pressure for sucking out the air inside the cover from the communication hole becomes large, the cooling effect can be further increased.

  In the display device according to the present invention, it is preferable that a good thermal conductor is provided in the vicinity of the communication hole in the cabinet.

  In the present invention, since the heat good conductor is provided in the vicinity of the communication hole in the cabinet, the natural convection air inside the cabinet can be heated by the heat good conductor in the vicinity of the communication hole. Natural convection in the vicinity of can be accelerated. As a result, the air inside the cover is further sucked out of the communication hole by the cabinet, so that the disk drive unit can be further cooled.

  In the display device according to the present invention, it is preferable that the good heat conductor is provided so that the communication hole and the exhaust port of the cabinet face in a space surrounded by the good heat conductor and the cabinet.

  In the present invention, the good heat conductor is provided so that the communication hole and the exhaust port of the cabinet face the space surrounded by the good heat conductor and the cabinet. When the display device is in use, the heat from the heat-generating component is transferred to the air in the space surrounded by the heat good conductor and the cabinet through the heat good conductor, and the air in the space is warmed to follow the heat good conductor. An upward flow is generated. As a result, the heated air flows out of the cabinet through the exhaust port, while the air inside the cover is sucked out of the communication hole into the cabinet. Since the communication hole is provided in the vicinity of the good heat conductor so as to face the good heat conductor, natural convection in the vicinity of the communication hole can be accelerated. As a result, the air inside the cover is further sucked out of the communication hole by the cabinet, so that the disk drive unit can be further cooled.

  In the display device according to the present invention, it is preferable that the communication hole is inclined upward from the rear side to the front side.

  In the present invention, since the communication hole inclined upward from the rear side to the front side is provided, when the flow of natural convection at the start of use of the display device is slow, the air in the cabinet is communicated with the communication hole. From the back to the inside of the cover can be prevented, and the temperature rise of the disk drive unit due to heat from the cabinet can be suppressed.

  In the display device according to the present invention, it is preferable that the cabinet and the disk drive unit are opposed to each other at the front and back.

  In the present invention, the cabinet and the disk drive unit are opposed to each other at the front and back. As a result, the heat of the cabinet is not transmitted to the disk drive unit due to heat conduction, so that the temperature rise of the disk drive unit can be suppressed. Further, the air between the cabinet and the disk drive unit is heated by heat from the heat-generating components in the display device, and an upward flow is generated. As described above, the warmed air flows into the cabinet through the communication hole. As a result, the disk drive unit can be effectively cooled while preventing the heat of the cabinet from being transmitted to the disk drive unit.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing the temperature rise of the disk drive unit by the heat from a cabinet, a disk drive unit can fully be cooled.

1 is a schematic external perspective view of a display device according to Embodiment 1 of the present invention. It is typical sectional drawing of the display apparatus which concerns on Embodiment 1 of this invention. It is an expanded sectional view near the communicating hole of a back cabinet. FIG. 3 is an enlarged cross-sectional view in the vicinity of a disk drive unit. It is a typical fragmentary sectional view of the display apparatus which concerns on Embodiment 2 of this invention. It is a typical fragmentary sectional view of the display apparatus which concerns on Embodiment 3 of this invention.

Hereinafter, the present invention will be described in detail by taking a liquid crystal display device, that is, a so-called liquid crystal television as an example, based on the drawings showing embodiments thereof.
(Embodiment 1)
FIG. 1 is a schematic external perspective view of a display device according to Embodiment 1 of the present invention. FIG. 2 is a schematic cross-sectional view of the display device according to Embodiment 1 of the present invention.

  In the figure, reference numeral 1 denotes a display unit. The display unit 1 includes a liquid crystal panel 11 having a display surface 11a on the front surface for displaying an image, and an optical sheet 12 such as a diffusion plate disposed on the rear side of the liquid crystal panel 11. And.

  On the rear side of the display unit 1, a backlight unit 14 that irradiates the display unit 1 with light is provided. The backlight unit 14 has a rectangular dish shape with an opening on the front side, a metal chassis 14a integrated with the display unit 1 on the opening side, and a plurality of housings housed and held in the chassis 14a. The lamp 13 is provided.

  The plurality of lamps 13 are juxtaposed vertically on the rear side of the optical sheet 12, and are housed and held inside the chassis 14a so as to irradiate the optical sheet 12 side with light. The lamp 13 is a cold-cathode fluorescent lamp or a hot-cathode fluorescent lamp having a substantially cylindrical shape having electrodes at both ends thereof, and electric power is supplied via the electrodes at both ends of each lamp 13 to obtain a pulse width. The brightness is controlled by the modulation signal.

  A circuit board 15 on which a plurality of electronic components 15a are mounted is attached to the rear surface of the chassis 14a through a plurality of support posts (not shown) at an appropriate distance from the chassis 14a. The circuit board 15 provided in the chassis 14a includes a control circuit board on which a control circuit that performs drive control of the display unit 1 is mounted, and a main circuit board on which main circuit components that process images displayed on the display unit 1 are mounted. A power circuit board on which power circuit components for supplying power to the main circuit board are mounted, an inverter circuit board on which electronic components such as an inverter transformer for supplying boosted power to the plurality of lamps 13 are mounted, and the like.

  A front cabinet 21 having a rectangular frame shape is fitted on the front side of the display unit 1 so as to surround the periphery of the display surface 11a. The front cabinet 21 has a deep dish shape and is fitted with a back cabinet 22 that covers the rear side of the display unit 1, and constitutes a cabinet 2 that accommodates the display unit 1 together with the front cabinet 21. The display unit 1 accommodated in the cabinet 2 is supported in a standing state by a stand 3.

  In the lower part of the back cabinet 22, there is provided an air inlet 23 for sucking outside air into the back cabinet 22. On the other hand, an exhaust port 24 for exhausting the air in the back cabinet 22 to the outside is provided in the upper part of the back cabinet 22.

  The back cabinet 22 is provided so as to face the circuit board 15 and the rear surface of the chassis 14a with an appropriate distance from each other. The gaps between the circuit board 15 and the chassis 14a generated thereby and the rear surface of the back cabinet 22 are communicated with the outside by the intake port 23 and the exhaust port 24 described above, and thereby reach from the intake port 23 to the exhaust port 24. A ventilation path is formed.

  A substantially rectangular concave portion 25 that is recessed inside the back cabinet 22 is provided on one side upper portion of the rear surface of the back cabinet 22 (left upper portion when the display device is viewed from the rear side). The disk drive unit 4 is provided so as to face the front and rear sides of the disc 41 at an appropriate distance from each other. Since the recess 25 and the disk drive unit 41 are not in contact, the heat of the back cabinet 22 is not transferred to the disk drive unit 41 by heat conduction, and heat transfer from the back cabinet 22 to the disk drive unit 41 can be suppressed.

  In addition, a communication hole 26 is provided in the upper portion of the recess 25 of the back cabinet 22 to communicate the inside of the back cabinet 22 and the inside of a cover 42 of the disk drive unit 4 described later. FIG. 3 is an enlarged cross-sectional view of the vicinity of the communication hole 26 of the back cabinet 22. As shown in the figure, the communication hole 26 is inclined upwardly from the rear side to the front side of the back cabinet 22, in other words, a natural convection passage from the intake port 23 to the exhaust port 24. It is provided so as to incline downstream. The white arrow in FIG. 3 indicates the upward flow of air.

  FIG. 4 is an enlarged cross-sectional view in the vicinity of the disk drive unit 4. The disk drive unit 4 includes a disk drive unit 41 that reads from and / or writes to an information storage medium, a cover 42 that covers the rear side of the disk drive unit 41, and two mounting brackets 43 that attach the disk drive unit 41 to the cover 42. , 43. In addition, although there exist DVD, HDD, BD etc. as an information storage medium, in this Embodiment, the disk drive part 4 is a BD drive part which has the reproduction | regeneration function with respect to BD, or a video recording / reproduction function.

  The disk drive unit 41 has a flat rectangular parallelepiped shape having an outlet 41a for inserting / extracting a BD on one side surface, and a pickup unit (not shown) that reads and writes signals on the BD with a laser or the like with high accuracy. )).

  The mounting bracket 43 includes an elongated rectangular plate portion 43a and a fixed plate portion 43b projecting in a direction orthogonal to the rectangular plate portion 43a from a part of the long side on one side of the rectangular plate portion 43a. Each of the rectangular plate portion 43a and the fixed plate portion 43b is provided with a through hole. The two mounting brackets 43, 43 are formed with rectangular plate portions 43 a, 43 a so that the fixed plate portions 43 b, 43 b protrude outwardly on two opposite side surfaces different from the one side surface having the opening of the disk drive unit 41. The small screws inserted into the through holes of the rectangular plate portions 43a and 43a in contact with each other are attached to the disk drive unit 41 by screwing into the female screws provided in the disk drive unit 41, respectively.

  The cover 42 has a deep dish shape. In the vicinity of the inner peripheral wall of the cover 42, a plurality of boss portions 42a projecting on the opening side are provided. In addition, a through hole 44 for intake is provided in a part of the peripheral wall of the cover 42. The through hole 44 is provided to be positioned below the disk drive unit 4 as shown in FIG. 4 when the disk drive unit 4 is attached to the back cabinet 22. In the disk drive unit 41 to which the mounting brackets 43 and 43 are attached, the small screws 45 inserted through the through holes of the fixing plate portions 43b and 43b of the mounting brackets 43 and 43 are screwed into the female screws provided in the boss portion 42a. Thus, it is integrated with the cover 42.

  The disk drive unit 4 integrated in this way is threaded by a small screw or engaged by a claw, so that a predetermined part of the back cabinet 22 (as described above, the recess 25 and the disk drive unit 41 are separated from each other by an appropriate length. Thus, the back cabinet 22 and the disk drive unit 4 are integrated with no gap. By this integration, the disk drive unit 4 has a cavity surrounded by the cover 42 and the back cabinet 22. The inside of the disk drive unit 4 is communicated with the inside of the back cabinet 22 through a communication hole 26 provided in the recess 25 of the back cabinet 22, thereby providing a cover 42 with a lower part of the disk drive unit 4. A ventilation path is formed from the intake through hole 44 to the communication hole 26 provided in the upper part of the disk drive unit 4.

  In the display device according to the present invention configured as described above, when the display device is in use, the electronic component 15a mounted on the circuit board 15 in the back cabinet 22 of the display device, the heat generating components such as the lamp 13 and the like. Natural air convection in which the air in the back cabinet 22 heated by the heat of the air rises and flows out of the back cabinet 22 from the exhaust port 24 while external air flows into the back cabinet 22 from the intake port 23 (see FIG. 2). Due to the natural convection in the back cabinet 22, the pressure inside the back cabinet 22 decreases according to the flow rate of the natural convection. As a result, the pressure inside the back cabinet 22 is lower than the pressure inside the cover 42 communicating with the back cabinet 22 through the communication hole 26, so that the air inside the cover 42 flows from the communication hole 26 to the back cabinet 22. The disk drive unit 41 can be cooled by being sucked out and causing convection around the disk drive unit 41. As a result, the temperature of the disk drive unit 41 can be made lower than the heat resistant temperature.

  Since the through hole 44 is provided in the cover 42 so as to be separated from the communication hole 26, the air inside the cover 42 is sucked into the back cabinet 22, while the air outside the display device is inserted into the cover 42. Convection (indicated by an arrow in FIG. 2) flowing in from 44 occurs. By this convection, the disk drive unit 41 can be sufficiently cooled. When the disk drive unit 41 is in an operating state, natural convection that rises around the disk drive unit 41 is generated by heat from the components of the disk drive unit 41. The disk drive unit 41 can be further sufficiently cooled by the natural convection and the convection from the through hole 44 in the cover 42 to the communication hole 26 due to the natural convection generated in the back cabinet 22 described above.

  Since the back cabinet 22 and the disk drive unit 41 are arranged so as to be opposed to each other in the front-rear direction, when the display device is used, the heat from the heat-generating component causes the back cabinet 22 and the disk drive unit 41 to pass through the back cabinet 22. As the air is heated, the upward flow is generated and flows into the back cabinet 22 from the communication hole 26 as described above. As a result, it is possible to effectively cool the disk drive unit 41 while preventing heat from the heat generating components inside the back cabinet 22 from being transmitted to the disk drive unit 41.

  Further, since the communication hole 26 is provided so as to be inclined upward from the rear side to the front side of the back cabinet 22, when the flow of natural convection at the start of use of the display device is slow, in other words, the communication hole 26. It is possible to prevent the air in the back cabinet 22 from flowing backward from the communication hole 26 into the cover 42 when the pressure difference between the inside of the back cabinet 22 and the inside of the cover 42 communicated with each other is small. it can. Thereby, it is possible to prevent the high-temperature air in the back cabinet 22 from flowing into the disk drive unit 4, and the temperature of the disk drive unit 41 can be maintained below the heat resistant temperature.

  It is desirable that the communication hole 26 is provided over an appropriate length in the lateral direction (width direction) of the display device. As the communication hole 26, for example, a plurality of circular holes may be provided across the substantially same width as the disk drive unit 4 by being separated by an appropriate length in the lateral direction (width direction), or substantially the same as the width of the disk drive unit 4. One long hole having a length may be provided. Of course, only one circular hole may be provided. Even in this case, since the air inside the cover 42 is sucked out into the back cabinet 22, the above-described effects can be obtained.

(Embodiment 2)
FIG. 5 is a schematic partial cross-sectional view of a display device according to Embodiment 2 of the present invention. On the lower side of the disk drive unit 4 of the back cabinet 22, an air inlet 23 a that sucks external air into the back cabinet 22 is provided. On the other hand, an exhaust port 24 a for exhausting the air in the back cabinet 22 to the outside is provided in the upper part of the back cabinet 22. A portion of the chassis 14 a facing the communication hole 26 is provided with a truncated cone-shaped convex portion 16 that protrudes toward the back cabinet 22 and narrows the space between the rear surface of the chassis 14 a and the back cabinet 22. . The convex portion 16 has a throttle portion 16a that is parallel to the rear surface of the chassis 14a, and an inclined surface 16b that smoothly connects the throttle portion 16a and the rear surface of the chassis 14a. The convex portion 16 is formed over an appropriate length in the vertical direction and the horizontal direction (width direction) of the display device in alignment with the communication hole 26. In addition, the convex part 16 should just be provided so that the aperture | diaphragm | squeeze part 16a may become substantially the same dimension as the communicating hole 26 or more. Since the other configuration is the same as that of the first embodiment shown in FIG. 2, the same reference numerals as those in FIG.

  In the display device according to the second embodiment configured as described above, the ventilation path extending from the natural convection intake port 23a to the exhaust port 24a generated in the back cabinet 22 is formed at a portion where the convex portion 16 is provided. Will be narrowed. Thereby, in the part in which the convex part 16 was provided, the flow of natural convection becomes quick and a pressure falls. As a result, the pressure difference between the inside of the back cabinet 22 communicated through the communication hole 26 and the inside of the cover 42 becomes large, and the pressure for sucking out the air inside the cover 42 from the communication hole 26 becomes large. The effect can be increased.

  In the present embodiment, the convex portion 16 is provided on the chassis 14a. However, the convex portion may be provided on the back cabinet 22 so as to protrude toward the chassis 14a. In this case, for example, the convex portion is formed so that the communication hole 26 is positioned substantially at the center of the throttle portion of the convex portion. Moreover, you may provide a convex part in both the chassis 14a and the back cabinet 22 so that it may mutually oppose.

  Further, in the present embodiment, the convex portion 16 is provided at a portion facing the communication hole 26, but the present invention is not limited to this, and the air passage is designed to increase the flow rate of natural convection in the vicinity of the communication hole 26. It is only necessary that the flow path cross-sectional area is narrow in the vicinity of the communication hole 26. You may provide in the upstream or downstream rather than the communicating hole 26 of a ventilation path. As a result, the flow rate of natural convection flowing through the ventilation path in the vicinity of the communication hole 26 is increased, so that the pressure for sucking the air inside the cover 42 from the communication hole 26 can be increased, and the above-described effects can be obtained. it can.

(Embodiment 3)
FIG. 6 is a schematic partial cross-sectional view of a display device according to Embodiment 3 of the present invention. On the upper part of the back cabinet 22, a heat good conductor 27 is provided over an appropriate length in the lateral direction (width direction) of the display device, which is warmed by heat generated by the heat generating components and warms the air near the communication hole 26. . The good thermal conductor 27 is opposed to the communication hole 26 in the front-rear direction, extends vertically in the vertical direction of the display device, and extends obliquely downward from the lower end of the vertical plate portion 27a. And an inclined plate portion 27b that is fixed. The vertical plate part 27a is fixed to the upper part of the peripheral wall of the back cabinet 22 at the upper end part. The good thermal conductor 27 is made of a material having a high thermal conductivity, and is made of a metal such as aluminum, copper, or iron. At the upper part of the back cabinet 22, a first exhaust port 24b and a second exhaust port 24c for exhausting the air in the back cabinet 22 to the outside are provided before and after sandwiching the vertical plate portion 27a of the heat good conductor 27, respectively. Since other configurations are the same as those of the first embodiment shown in FIG. 4, the same reference numerals as those in FIG.

  In the display device according to the third embodiment configured as described above, when the display device is in use, the air in the back cabinet 22 heated by the heat from the heat-generating component rises and the first exhaust port While flowing out of the back cabinet 22 from the 24b and the second exhaust port 24c, natural convection in which external air flows into the interior of the back cabinet 22 from the intake port 23 occurs. Due to the natural convection in the back cabinet 22, as described above, the air inside the cover 42 is sucked into the back cabinet 22 from the communication hole 26, and convection is generated around the disk drive unit 41 to cool the disk drive unit 41. Is done.

  In the display device according to the present embodiment, since the heat good conductor 27 is provided in the vicinity of the communication hole 26 in the back cabinet 22, the heat generated in the heat-generating component is transferred by heat conduction through the back cabinet 22. Alternatively, the heat good conductor 27 is warmed by being transmitted to the heat good conductor 27 by radiant heat, and the heat good conductor 27 heats the air in the vicinity of the communication hole 26. As a result, the air rising inside the back cabinet 22 by natural convection is heated by the heat good conductor 27 provided in the vicinity of the communication hole 26. Due to this heating, natural convection in the vicinity of the communication hole 26 is accelerated, and the pressure difference between the interior of the back cabinet 22 communicated through the communication hole 26 and the interior of the cover 42 is further increased. As a result, the air inside the cover 42 is further sucked out from the communication hole 26 by the back cabinet 22, so that the disk drive unit 41 can be further cooled. Since a material having a high thermal conductivity such as a metal is used for the good heat conductor 27, heat from the heat generating component can be efficiently transferred to the air in the vicinity of the communication hole 26 by the good heat conductor 27, and natural convection is promoted. Thus, the cooling effect can be enhanced. As a result, the temperature of the disk drive unit 41 can be made lower than the heat resistant temperature.

  In this embodiment, the good thermal conductor 27 includes a vertical plate portion 27a extending in the vertical direction of the display device and an inclined plate portion 27b extending obliquely downward from the lower end of the vertical plate portion 27a. The shape of the good heat conductor is not limited to this, and may be any shape that can efficiently transfer heat from the heat-generating component to the air in the vicinity of the communication hole 26. The shape of the good thermal conductor may be, for example, a rod shape.

  Moreover, you may have a side wall on the both sides of the good heat conductor 27 so that the ventilation path from the communicating hole 26 to the 2nd exhaust port 24c may be enclosed. Side walls (not shown) extend from the width direction ends of the vertical plate portion 27 a and the inclined plate portion 27 b, and the side walls are fixed to the back cabinet 22. That is, the communication hole 26 and the exhaust port 24 c face the space surrounded by the good heat conductor 27 and the back cabinet 22. In this configuration, when the display device is in use, heat from the heat-generating component is transmitted to the air between the heat good conductor 27 and the disk drive unit 41 via the heat good conductor 27, and the heat good conductor 27 and the disk drive unit. The air between 41 is warmed and an upward flow along the heat good conductor 27 is generated. As a result, the warmed air flows out from the second exhaust port 24c to the outside of the display device, while the air inside the cover 42 is sucked out from the communication hole 26 to the back cabinet 22 and from the through hole 44 by natural convection. External air flows into the cover 42. The heat generated during the operation of the disk drive unit 41 warms the air inside the cover 42, so that the natural convection inside the cover 42 is promoted, and the disk drive unit 41 is sufficiently cooled by the natural convection inside the cover 42. Can do. Since a material having high thermal conductivity is used for the good heat conductor 27, heat from the heat generating component can be efficiently transferred to the air between the good heat conductor 27 and the disk drive unit 41, and natural convection is promoted. , Can enhance the cooling effect. As a result, the temperature of the disk drive unit 41 can be made lower than the heat resistant temperature.

  In the above embodiment, the intake through hole 44 is provided in the lower part of the disk drive unit 4 and the communication hole 26 is provided in the upper part of the disk drive unit 4. However, the present invention is not limited to this. And the communication hole may be provided separately from each other so as to flow around the disk drive unit 41 and generate convection from the through hole to the communication hole. The communication hole is preferably in the upper part of the disk drive unit 4, but the above-described effects can be obtained even in the central part. Further, by providing a through hole in the upper part of the disk drive unit and providing a ventilation path for guiding natural convection to the disk drive unit, convection from the through hole to the communication hole can be generated, and the same effect can be obtained. The same applies to the case where the through-hole and the communication hole are provided at the same vertical position and separated in the horizontal direction (width direction) of the display device.

  In the above embodiment, the communication hole 26 having the same hole diameter over the entire length is provided so as to incline upward from the rear side to the front side of the back cabinet 22. However, the shape is not limited to this, and any shape may be used as long as the air on the back cabinet 22 side does not easily flow into the disk drive unit 4. For example, only the upper part of the communication hole may be inclined.

  In the above embodiment, the back cabinet 22 is provided with the hole-like intake and exhaust ports. However, the shape and the installation position of the intake and exhaust ports are not limited to this. What is necessary is just to comprise so that a natural convection may arise. For example, you may comprise so that a natural convection may pass by providing a clearance gap between the front cabinet 21 and the back cabinet 22. FIG. An intake port and / or an exhaust port may be provided in the front cabinet 21 instead of the back cabinet 22.

  In the above embodiment, the liquid crystal television has been described as an example of the display device. However, the present invention is not limited to this, and the present invention is also applicable to display devices such as liquid crystal display devices other than liquid crystal televisions, plasma display devices, and EL displays. Needless to say, the invention can be implemented in variously modified forms within the scope of the matters described in the claims.

DESCRIPTION OF SYMBOLS 1 Display part 11a Display surface 14a Chassis 16 Convex part 2 Cabinet 21 Front cabinet 22 Back cabinet 23, 23a Intake port 24, 24a Exhaust port 24b 1st exhaust port 24c 2nd exhaust port 26 Communication hole 27 Thermal good conductor 4 Disk drive part 41 Disk drive unit 42 Cover 44 Through hole

Claims (7)

  A display unit having a display surface on the front side; a cabinet covering the rear side of the display unit; a disk drive unit provided on the rear side of the cabinet for reading and / or writing to an information recording medium; and And a cover that covers the rear side, and is configured to generate natural convection in the cabinet, wherein the cabinet has a communication hole that communicates the interior of the cabinet with the interior of the cover. A display device comprising:   The display device according to claim 1, wherein the cover is provided with a through hole spaced apart from the communication hole.   Provided inside the cabinet and provided with a chassis that supports the display unit from the rear side, and at least one of the cabinet and the chassis has a convex portion protruding toward the other in the vicinity of the communication hole. The display device according to claim 1, wherein the display device is provided.   The display device according to claim 1, wherein a good thermal conductor is provided in the vicinity of the communication hole in the cabinet.   The display device according to claim 4, wherein the heat good conductor is provided so that the communication hole and an exhaust port of the cabinet face in a space surrounded by the heat good conductor and the cabinet.   The display device according to claim 1, wherein the communication hole is inclined upward from a rear side to a front side.   The display device according to claim 1, wherein the cabinet and the disk drive unit are spaced apart from each other in the front-rear direction.

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