JP4617652B2 - Heat dissipation mechanism of electronic equipment - Google Patents

Description

  The present invention relates to a heat dissipation mechanism for a display device which is a thin display device such as an electronic apparatus such as a liquid crystal TV or a plasma TV, and the heat of the display device which generates heat by light from a light source that illuminates the display device is transmitted from a front panel. The object is to obtain a heat dissipation mechanism that effectively dissipates heat.

  For example, a liquid crystal TV (television), a plasma TV (television), or the like is given as an example of a thin flat display device. This type of thin flat display device has a large amount of heat generation. For this reason, a flat display device that has been thinned may be required to be thin as a whole, and heat countermeasures are a very big problem.

As a heat countermeasure for a thin display device, for example, there is a method of using a fan or a heat pipe, but in this case, there are problems in terms of noise and cost. In addition, it is necessary to take a large space in order to eliminate heat in the display device, and to provide a large and wide opening for heat dissipation, which is disadvantageous in terms of design restrictions or thinning. .
JP 2000-20171 A

  By the way, in FIG. 1 of [Patent Document 1], as a heat dissipation measure for the CPU 1 built in the apparatus main body 50 in the portable information processing apparatus, heat is dissipated using the heat dissipation plate 5 provided in the liquid crystal display panel 7 that can be opened and closed. Technology is disclosed. This heat radiation measure is to radiate the heat of the CPU 1 that has generated heat from the heat pipe 3 to the heat radiating plate 5. The heat radiating plate 5 is provided so as to be exposed on the outer surface of the lid portion 51 having the liquid crystal display panel 7, so that heat radiation using the entire area of the heat radiating plate 5 can be realized.

  However, the heat dissipation measure as described above is to dissipate heat from the CPU 1 in the apparatus main body 50 via the heat pipe 3 by the heat dissipating plate 5 provided on the lid 51, which is a liquid crystal TV or plasma TV. However, the heat of the display device that generates heat due to light from the light source that illuminates the thin display device is not radiated.

In order to solve the above problems and achieve the object of the present invention, a heat dissipation mechanism of an electronic device according to the present invention includes a display device that generates heat by light from a light source that illuminates the display device, and a front casing of the display device. In an electronic apparatus having a front panel that constitutes a body, the display device includes a front frame body that surrounds the periphery of the front surface, and a display housing that transfers heat generated by the display device together with the front frame body. The front panel is composed of a metal frame member made of a heat conductive material and a plastic frame member fixed integrally with the metal frame member. The front frame metal frame member is surface-bonded to the front frame body of the display device. And heat transfer sheet or paste heat transfer between the front frame and the metal frame member of the front panel. Characterized in that an intervening gel.

According to the heat dissipation mechanism of the electronic device of the present invention, the heat generated by the light from the light source that illuminates the display device can be effectively dissipated from the metal frame member of the front panel from the front frame of the display device. In addition, there is no need for a space for heat dissipation, the structure is simple, the design can be characterized, and the cost can be reduced.

  Hereinafter, the best mode of a heat dissipation mechanism of an electronic device according to the present invention will be described with reference to the drawings, taking a liquid crystal TV as an example.

  1 is an external perspective view of a liquid crystal TV as viewed from the front cabinet side, FIG. 2 is a cross-sectional view of the liquid crystal TV along the line AA in FIG. 1, and FIG. 3 is a perspective view of a state in which the front cabinet and the display device are separated. FIG. 3 is a perspective view of the front cabinet as seen from the back side.

  A rear cabinet 2 is provided on the back side of the front cabinet indicated by reference numeral 1, and a display device 3 is provided on the rear cabinet 2 side. The display device 3 accommodates a liquid crystal display element (LCD), various circuit boards and the like as a unit, and a liquid crystal screen 4 of the liquid crystal display element faces the opening 1a of the front cabinet 1 as a whole. And the depth of the rear cabinet 2 is made thin.

  Speakers 5 are disposed on the left and right sides of the rear cabinet 2, and the liquid crystal TV described above includes a stand 6 at the bottom of the rear cabinet 2.

Here, a main configuration of the display device 3 will be described.
In the display device 3, a liquid crystal display element 7 having a liquid crystal screen 4 and a light guide plate 8 made of an acrylic material or the like are joined to the back surface of the display device 3, and the liquid crystal display element 7 is illuminated on the upper and lower portions on the back side of the light guide plate 8. Are arranged as a plurality of rows of backlights. The liquid crystal display element 7, the light guide plate 8 and the light source 9 are unitized as a unit by a display housing 10 made of a metal material with an insulating material (not shown) interposed therebetween. Further, the periphery of the front side of the liquid crystal screen 4 is covered with a front frame 11 formed by bending the display housing 10 integrally.

  The display casing 10 in which the liquid crystal display element 7, the light guide plate 8 and the light source 9 are unitized is provided with various circuit boards on the back side thereof, and the liquid crystal display element 7, the light source 9 and a flexible wiring board (not shown). Connected by. The display housing 10 and various circuit boards are protected by the rear cabinet 2.

  In the display device 3 configured as described above, the light from the light source 9 directly passes through the light guide plate 8 and illuminates the liquid crystal display element 7, and the light from the light source 9 is formed on the back surface of the display housing 10, for example. The liquid crystal display element 7 can be illuminated by the light reflected from the reflective film 12.

  By the way, the display housing 10 together with the display device 3 generates heat by the light from the light source 9 that illuminates the liquid crystal display element 7. In the present embodiment, the heat generated in the display housing 10 is generated at a high temperature (for example, about 40 ° C.) in the upper and lower portions of the display housing 10 because the light source 9 is provided in the upper and lower portions of the liquid crystal display element 7.

  In the present invention, heat is effectively radiated from the front cabinet 1 without taking up a large space to eliminate the heat of the display housing 10 or increasing the number of openings for heat radiation.

Hereinafter, details of the front cabinet 1 will be described.
The front cabinet 1 includes a quadrilateral frame-like plastic frame member made of a plastic material such as an ABS resin material and a metal frame member made of a metal material. Two side frame members facing each other on the left and right side are plastic side frame members 13 and 14, and metal frame members 15 made of a metal material having good heat conductivity, for example, an aluminum material, as upper and lower facing frame members. , 16 are used to dissipate the heat of the high temperature portions of the upper and lower portions of the display housing 10 through the metal frame members 15, 16.

  Next, an example of a structure for attaching the metal frame members 15 and 16 to the plastic side frame members 13 and 14 will be described.

  The plastic side frame members 13 and 14 are integrally connected by thin reinforcing bars 17 and 18 at upper and lower end portions thereof, and the metal frame members 15 and 16 are supported by using the reinforcing bars 17 and 18.

  The details of the reinforcing bars 17 and 18 and the plastic side frame members 13 and 14 will be described with respect to the upper reinforcing bar 17. The reinforcing bar 17 is connected so as to be passed to the back side of the plastic side frame members 13 and 14. Therefore, the ends 13a and 14a on the surface side of the plastic side frame members 13 and 14 are cut off. Slit grooves 19 and 20 are formed between the cut-off plastic side frame members 13 and 14 and the reinforcing bar 17.

  Since the configuration of the metal frame members 15 and 16 is vertically symmetrical, the configuration of the upper metal frame member 15 will be described.

On the upper side of the metal frame member 15 is formed a flange-like flange portion 21 bent rearward. The left and right end portions of the metal frame member 15 are each formed with two grooves 22 and 23 having different lengths on the inside and on the outside in a step shape, and there are no grooves above the short groove 23. A hole 24 is opened in the hole.

  The metal frame member 15 described above is inserted from the slit grooves 19 and 20 of the plastic side frame members 13 and 14 and is fixed by fixing means described later, thereby constituting the upper frame of the front cabinet 1.

  FIG. 5 is an enlarged perspective view of one end portion of the metal frame member 15 and the plastic side frame member 14 as seen from the back side of the front cabinet 1. FIG. 5 shows the structure of the fixing means of the metal frame member 15. Has been.

  On the back surface of the plastic side frame member 14, two stepped bosses 25, 26 are projected at positions corresponding to the two slots 22, 23 of the metal frame member 15 described above. Screw holes 25a and 26a are formed.

Reference numeral 40 denotes, for example, an array-shaped holder made of a plastic material serving as a fixing means for the metal frame member 15. Through holes 27 and 28 are formed on both ends of the holder 40 so as to be engaged with the outer peripheral surfaces of the bosses 25 and 26 described above. Further, a rib 29 is projected on one side of the holder 40 , and a pin 30 is provided on the back side of the rib 29 to be engaged with the hole 24 formed in the metal frame member 15.

  Next, how the metal frame member 15 is fixed to the plastic side frame member 14 will be described with reference to FIGS. 6 and 7 taking one end of the metal frame member 15 as an example.

First, as shown in FIG. 5, the metal frame member 15 is inserted into the slit groove 20 from above the plastic side frame member 14. Here, the inserted metal frame member 15 is inserted such that the two slots 22 and 23 are respectively engaged and guided by the two bosses 25 and 26 on the plastic side frame member 14 side. When the insertion of the metal frame member 15 is completed, the flange portion 21 of the metal frame member 15 is fitted into the upper surface of the plastic side frame member 14, and the end portions of the groove holes 22 and 23 of the metal frame member 15 are The metal frame member 15 is positioned with respect to the plastic side frame member 14 without rattling (see FIG. 6).

Thereafter, the holder 40 is inserted into the bosses 25 and 26 through the through holes 27 and 28 from the back side of the metal frame member 15. By inserting the holder 40, the pin 30 provided on the rib 29 is engaged with the hole 24 formed in the metal frame member 15. Finally, by screwing the screws 31 and 31 into the screw holes 25a and 26a of the bosses 25 and 26 through the through holes 27 and 28 of the holder 40 , the metal frame member 15 is sandwiched between the plastic side frame member 14 and the holder 40. Fixing is complete.

The metal frame member 15 that is fixed as described above, are engaged with stepped-shaped bosses 25, 26 and screwed by the holder 40, the hole 24 the pin 30 is bored in the metal frame member 15 of the holder 40 As a result, the metal frame member 15 does not have a gap between the plastic side frame member 14 and has a firm structure without rattling, and the pin of the holder 40 can be fixed. Since 30 is engaged with the hole 24 formed in the metal frame member 15, the metal frame member 15 can be reliably prevented from coming out.

  The fixing structure of the metal frame member 15 described above has been described with respect to one end side of the metal frame member 15, but of course the same fixing structure is also applied to the other end side of the metal frame member 15. In the above description, the metal frame member 15 on the upper side of the front cabinet 1 has been described. However, the metal frame member 16 on the lower side of the front cabinet 1 has the same fixing structure. In this case, the metal frame member 16 is inserted from below the left and right plastic side frame members 13 and 14.

FIG. 4 shows a state in which the upper and lower metal frame members 15 and 16 are fixed to the left and right plastic side frame members 13 and 14 by the holder 40 from the back side. The front cabinet 1 configured as described above is in a state in which the back surfaces of the upper and lower metal frame members 15 and 16 are exposed from the reinforcing bars 17 and 18, and the metal frame is attached when the front cabinet 1 is assembled to the display housing 10. The exposed portions of the members 15 and 16 are surface joined to the upper and lower portions of the front frame 11 of the display housing 10 as shown in FIG.

  Thereafter, the display housing 10 is assembled by screwing to a plurality of retaining bosses 32 protruding from the back surfaces of the plastic side frame members 13 and 14, and the rear cabinet 2 is assembled from the back surface of the display housing 10. Thus, the liquid crystal TV as shown in FIG. 1 is obtained.

  With the above configuration, the heat generated in the display casing 10 together with the display device 3 by the light from the light source 9 that illuminates the liquid crystal display element 7, particularly in the upper and lower portions near the light source 9, Heat can be reliably transferred from the front frame 11 to the metal frame members 15 and 16 of the front cabinet 1, and heat can be effectively radiated from the metal frame members 15 and 16. Further, the front cabinet 1 itself has side panel portions made of plastic side frame members 13 and 14, and upper and lower panel portions are made of metal frame members 15 and 16 made of aluminum, so that design features can be obtained. The texture of the front cabinet 1 can be improved.

  In the embodiment of the present invention, since the light source 9 is arranged at the upper and lower positions of the display device 3, particularly the upper and lower portions of the display device 3 generate heat at a high temperature. The members 15 and 16 are configured to radiate heat from the metal frame members 15 and 16, but when the light source is arranged at the left and right positions of the display device 3, the frame on the side of the front cabinet 1 is a metal frame. It is effective to dissipate heat generated from the display device 3 from the members.

  In the embodiment, the metal frame members 15 and 16 are made of an aluminum material. However, by anodizing the metal frame members 15 and 16, the heat radiation effect of the heat generated by the display device 3 can be further increased. Is preferred.

  Further, as the metal frame members 15 and 16, the surface area of the metal frame members 15 and 16 can be increased by performing hairline processing on the aluminum material, for example, by attaching a very thin streak-like groove on the surface of the aluminum material or by applying a scratch treatment. The heat dissipation effect can be expected.

  Further, by interposing a heat conductive sheet or a paste-like heat conductive gel between the front frame body 11 of the display housing 10 and the metal frame members 15, 16, the front frame body 11 of the display housing 10. This is more preferable because the heat transfer action from the metal frame members 15 and 16 to the metal frame members 15 and 16 can be performed more effectively.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

  In the heat radiating mechanism according to the present invention, the case where an aluminum material or an alumite material is used as the heat transfer material of the front cabinet 1 has been described. However, other than the metal material or metal material other than aluminum as long as it has heat transfer property It may be a material.

  In addition, the temperature and temperature at which the display device generates heat is transmitted to the front cabinet, and paint or materials that reversibly change color are applied to all or part of the aluminum surface, so that the liquid crystal display element operates and stops. As a result of this color change, the design characteristics of the front cabinet can be achieved.

  In addition, if paints or substances that change color due to temperature are applied to other material parts of the front cabinet other than aluminum as well, there is a difference in color between the aluminum part and other material parts. be able to.

Moreover, although the heat radiating mechanism by this invention demonstrated the case where it applied to the front cabinet of liquid crystal TV, it is widely applicable to the heat radiating mechanisms, such as the front cabinet of plasma TV, another display device.

  Furthermore, the heat dissipation mechanism according to the present invention does not have to be generated by the display device, and can also be applied to a heat dissipation mechanism when the display housing generates heat due to heat generated by elements on the substrate.

It is the external appearance perspective view which applied the heat dissipation mechanism in this invention to liquid crystal TV, and looked at the front cabinet from the front side. It is sectional drawing of the principal part of this invention in the AA line of FIG. It is a perspective view of the state which separated the front cabinet and the display apparatus. It is the perspective view which looked at the front cabinet from the back side. It is the figure which looked at one corner part of the plastic side frame of a front cabinet, and the metal frame member which is an upper frame from the back side, and is the perspective view which showed the structure of the fixing means. It is a perspective view in the middle of assembling the metal frame member which is an upper frame similarly to a plastic side frame. It is a perspective view at the time of completion | finish of assembling | attaching the metal frame member which is an upper frame similarly to a plastic side surface frame.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Front cabinet, 2 ... Rear cabinet, 3 ... Display apparatus, 7 ... Liquid crystal display element, 9 ... Light source, 10 ... Display housing | casing, 11 ... Front frame, 13, 14 ... Plastic side frame member, 15, 16 ... Metal frame member, 17, 18 ... Reinforcing bar

Claims (3)

In an electronic apparatus having a display device that itself generates heat by light from a light source that illuminates the display device, and a front panel that constitutes a front casing of the display device.
The above display device, the has a front frame body that surrounds the front periphery, transfer heat display casing together with the front frame body heating of the display device is provided,
The front panel includes a metal frame member made of a heat conductive material, and a plastic frame member fixed integrally with the metal frame member.
The metal frame member of the front panel is surface-bonded and assembled to the front frame body of the display device, and a heat conductive sheet or paste-like heat conduction is provided between the front frame body and the metal frame member of the front panel. A heat dissipating mechanism for an electronic device, wherein the heat generated by the display device is dissipated from the metal frame member of the front panel by interposing a gel. In the heat dissipation mechanism of the electronic device according to claim 1,
A heat dissipating mechanism for an electronic device, wherein the heat conductive material of the metal frame member is made of an aluminum material or an alumite material. In the heat dissipation mechanism of the electronic device according to claim 1,
A heat dissipating mechanism for an electronic device, wherein the surface of the heat conductive material of the metal frame member is subjected to hairline processing or scratching to increase the surface area of the front panel.

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