JP5646689B2 - Housing, display device, and television receiver - Google Patents

Description

  The present invention relates to a housing having a heat radiation hole for radiating heat generated from a heating element such as an electric device, a display device including the housing and a display portion, and a television receiver including the display device.

  In recent years, the performance and quality of a display device such as a liquid crystal display device have been improved, and the appearance has been reduced in thickness, weight, and frame size. Liquid crystal display devices are widely used as video display devices for television receivers (hereinafter referred to as TV receivers). Unlike a self-luminous device, a liquid crystal display device requires a backlight as a light source, and displays an image by controlling light transmittance determined by the electro-optical characteristics of the liquid crystal.

There are two types of backlights: an edge light method (side light method, light guide plate method) and a direct type. In recent years, an edge light system has been widely adopted in order to realize thinning, lightening, and narrowing of a frame of a liquid crystal display device.
In the case of a liquid crystal display device including an edge light type backlight, a rectangular light guide plate, an optical sheet, and an LED substrate are housed in a rectangular box-shaped chassis to constitute a backlight unit. The LED substrate is formed by mounting a plurality of LEDs on the plane of an elongated substrate.
When the backlight unit is an edge light type on one side, the LED substrate is disposed on one long side surface of the light guide plate, and when the backlight unit is an edge light type on both sides, the LED substrate is disposed on both long side surfaces of the light guide plate. Is done.

  A liquid crystal display panel (hereinafter referred to as a display panel) that has a rectangular plate shape is placed in front of the backlight unit in a vertical orientation, the front edge and side of the display panel are covered with a front cabinet, and the back of the backlight unit is A liquid crystal display device is obtained by covering with a rear cabinet (housing) having a rectangular box shape. In the liquid crystal display device, light emitted from the LED and incident on the long side surface of the light guide plate is emitted from the main surface of the light guide plate and irradiates the back surface of the display panel.

  In the liquid crystal display device configured as described above, heat is intensively generated at the placement portion of the LED substrate or the like. When heat is trapped in the housing, there is a risk of malfunctioning in the internal components. Therefore, it is necessary to dissipate heat by providing a hole in the back surface of the housing. In recent years, the input power of LEDs has increased due to the increase in screen size and resolution, and the amount of heat generated has increased, so the importance of heat dissipation has increased.

Patent Document 1 discloses that when a plurality of rectangular holes are provided on the bottom surface of the rear cabinet for heat dissipation, the lower surface of the hole is formed in a tapered shape inclined from the inside to the outside.
In the case of the invention according to Patent Document 1, intrusion of water into the inside is suppressed, but the vertical length inside the hole is shorter than the vertical length outside, the heat dissipation efficiency is poor, and the appearance is bad. There was a problem.

In recent years, the box depth of the rear cabinet has been reduced in order to reduce the thickness of the liquid crystal display device. Even if the thickness is the same, the impression received varies greatly depending on the shape of the rear cabinet, and the one that looks thinner is preferred.
In order to make the rear cabinet appear thinner, a design in which the thinnest part and the thickest part are connected by a curved surface or an inclined surface is adopted.
However, when providing a hole that extends in the inclined direction and radiates heat from the LED board or the like in the inclined portion of the rear cabinet, etc. When water is spilled from the side, there is a risk that water may enter the display device, which may cause failure and fire.

  In order to prevent the intrusion of water from the top surface side when holes are provided in the inclined part instead of the flat part on the rear side of the rear cabinet, conventionally, a concave part recessed inward is provided in the inclined part, and the hole is formed in the bottom surface. Was also made. However, in this case, since the distance (depth) from the bottom surface of the recess to the outer surface of the housing varies depending on the circumferential position of the peripheral surface of the recess as described below, the lateral width of the bottom surface or the opening surface of the recess is vertical. There was a problem of non-uniformity.

11 is a front view showing a part of the inclined portion of the rear surface of the rear cabinet of the conventional liquid crystal display device, FIG. 12 is a schematic perspective view showing a part of the inclined portion of the rear cabinet, and FIG. 13A is formed in the inclined portion. 13B is a cross-sectional view taken along line BB in FIG. 13A, FIG. 13C is a cross-sectional view taken along line CC in FIG. 13A, and FIG. 13D is a cross-sectional view taken along line DD in FIG.
The rear cabinet 9 has an inclined portion on the back surface, and a plurality of concave portions 91 recessed inward are arranged in the horizontal direction in the inclined portion. The recess 91 has a rectangular shape in which the opening surface has a uniform lateral width, and the side surface has a tapered shape inclined with respect to the peripheral edge of the opening. And the hole 91a, 91b, 91c is arranged in the vertical direction in the bottom face of the recessed part 91. As shown in FIG.

  The recess 91 is inclined at a certain angle from each position in the circumferential direction of the opening peripheral edge toward the edge of the bottom surface. This inclination is a draft provided for extraction from the molding die. As shown in FIG. 13, since the gradient of the side surface of the concave portion 91 with respect to the opening peripheral edge portion is constant with respect to the circumferential position of the side surface, the larger the distance in the depth direction between the bottom surface and the opening peripheral edge portion, The width is shortened. That is, the lateral width of the bottom surface gradually decreases from the hole 91a side to the hole 91c side, and the bottom surface becomes trapezoidal. Therefore, the heat dissipation effect on the hole 91c side is reduced. The opening surface has a rectangular shape with a uniform lateral width, whereas the bottom surface has a trapezoidal shape as described above, so the appearance of the rear cabinet 9 is poor.

14A is a front view showing a recess having another configuration, FIG. 14B is a sectional view taken along line BB in FIG. 14A, FIG. 14C is a sectional view taken along line CC in FIG. 14A, and FIG. FIG.
The bottom surface of the recess 92 has a rectangular shape with a uniform lateral width. The recess 92 is formed using a mold configured to take a draft angle at a constant angle from the edge of the bottom surface toward the peripheral edge of the opening, and the gradient of the side surface with respect to the edge of the bottom surface is Since it is constant with respect to the direction position, the lateral width of the opening increases as the distance in the depth direction between the bottom surface of the recess 92 and the peripheral edge of the opening increases. That is, the lateral width of the opening gradually increases from the hole 92a side to the hole 92c side, and the opening surface becomes trapezoidal. Whereas the bottom surface has a rectangular shape with a uniform lateral width, the opening surface has a trapezoidal shape, the appearance is deteriorated, and it is necessary to increase the pitch when the concave portions 92 are arranged side by side, The heat dissipation effect is reduced.

Japanese Patent Laid-Open No. 10-229530

As described above, in the case of the concave portion 91, the lateral width of the bottom surface gradually decreases, and in the case of the concave portion 92, the opening surface has a trapezoidal shape, and the side-by-side pitch of the concave portions 92 is larger than that of the rectangular shape. There is a problem that a large number of the concave portions 92 cannot be arranged in parallel, and the heat radiation efficiency is poor in any case.
When the bottom surface or the opening surface of the recess has a trapezoidal shape, the appearance deteriorates. Further, when the shape and size of the bottom surface and the opening surface of the recesses arranged in the lateral direction are not uniform, the appearance is deteriorated.
In addition, it is conceivable to provide the hole while avoiding the inclined part or the curved part, but in this case, the range in which the hole is provided is limited, and the heat dissipation efficiency is deteriorated.

  The present invention has been made in view of such circumstances, and the shape of the bottom surface and the opening surface of the concave portion provided on the inclined surface or curved surface of the bottom surface can be made the same while suppressing the ingress of water. A housing that can be arranged in parallel at a constant pitch, has a high heat radiation efficiency combined with a high degree of freedom in arranging the recesses, and has a good appearance, a display device including the housing, and the display An object is to provide a television receiver including the apparatus.

The housing according to the present invention has a first opening, has an inclined surface or a curved surface outside the first bottom surface facing the first opening, and is recessed inside the inclined surface or curved surface. In the housing having a plurality of recesses, and a hole is provided in the second bottom surface of the recess, the peripheral surface of each recess is inclined with respect to the peripheral edge of the second opening of the recess, The gradient of the peripheral surface with respect to the peripheral edge portion corresponds to the circumferential position of the peripheral surface, and the gradient is larger as the distance between the second opening and the second bottom surface is shorter .

  The housing according to the present invention is characterized in that the second bottom surface is substantially parallel to the surface of the first opening.

  The housing according to the present invention is characterized in that the surface of the second opening and the second bottom surface are rectangular.

  A display device according to the present invention includes a display unit and any one of the above-described housings covering the display unit.

  A television receiver according to the present invention includes the above-described display device and a receiving unit that receives a television broadcast, and displays an image on the display device based on the television broadcast received by the receiving unit. It is characterized by the above.

According to the present invention, the shape of the bottom surface and the opening surface of the recess can be made the same. Therefore, heat can be uniformly dissipated from the bottom surface of the recess toward the opening surface. Further, the shape and size of the bottom surface and the opening surface of the recesses can be made uniform between the recesses arranged side by side in the lateral direction, the pitch of the arrangement can be made uniform, and a large number of recesses can be provided.
Then, the shape, size, and pitch of the recesses can be optimized, and coupled with the high degree of freedom in arranging the recesses, the heat dissipation efficiency can be improved.
Furthermore, since the shape and size of the recess can be made uniform, the appearance is good. Moreover, not only the inclined surface inclined in one direction but also the curved surface having a complicated shape can be provided with a concave portion without breaking the shape of the bottom surface and the opening surface of the concave portion. Can be designed.

It is a perspective view which shows typically the TV receiver which concerns on embodiment of this invention. It is a front view of TV receiver. It is a side view of TV receiver. It is a reverse view of TV receiver. It is a partially expanded back view which shows the rear cabinet with which a TV receiver is provided. It is a partially expanded side view of TV receiver. It is a partial cross section figure of the rear cabinet of TV receiver. It is a typical perspective view which shows a recessed part. It is a typical sectional view of a crevice. 10A is a front view of the recess, FIG. 10B is a cross-sectional view taken along line BB in FIG. 10A, FIG. 10C is a cross-sectional view taken along line CC in FIG. 10A, and FIG. It is a front view which shows a part of inclination part of the back surface of the rear cabinet of the conventional liquid crystal display device. It is a typical perspective view which shows a part of inclination part of a rear cabinet. 13A is a front view of a recess formed in an inclined portion, FIG. 13B is a cross-sectional view taken along line BB in FIG. 13A, FIG. 13C is a cross-sectional view taken along line CC in FIG. 13A, and FIG. It is sectional drawing. 14A is a front view showing a recess having another configuration, FIG. 14B is a sectional view taken along line BB in FIG. 14A, FIG. 14C is a sectional view taken along line CC in FIG. 14A, and FIG. FIG.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
1 is a perspective view schematically showing a TV receiver 1 according to an embodiment of the present invention, FIG. 2 is a front view of the TV receiver 1, FIG. 3 is a side view of the TV receiver 1, and FIG. 5 is a partially enlarged back view showing a rear cabinet 4 included in the TV receiver 1, FIG. 6 is a partially enlarged side view of the TV receiver 1, and FIG. 7 is a rear cabinet of the TV receiver 1. 4 is a partial cross-sectional view of (housing) 4. FIG.
The TV receiver 1 includes a display panel 31 and a backlight unit (not shown), has a horizontally long rectangular parallelepiped shape, and is a vertically placed display module 3 and a front cabinet that covers the front edge and side surfaces of the display module 3. 2, a rear cabinet 4 that covers the back of the display module 3, a stand 6 that supports the display module 3, a tuner (receiver) 7 that receives broadcast waves from an antenna (not shown), and encoded broadcast waves And a decoder 8 for decoding.

The backlight unit of the display module 3 is configured by housing a rectangular light guide plate, an optical sheet, and an LED substrate in a rectangular box-shaped chassis. The LED substrate is formed by mounting a plurality of LEDs on the plane of a substrate having an elongated rectangular plate shape. The light guide plate is placed on the bottom plate of the chassis, and the LED substrate is disposed on the long side surface on the upper side of the light guide plate. On the outer surface of the bottom plate of the chassis, a main board on which the above-described tuner 7 and decoder 8 are mounted is provided, and the main board is covered with a cover. An optical sheet is placed on the light guide plate, and a display panel 31 is placed on the optical sheet to constitute the display module 3.
The front cabinet 2 is made of, for example, aluminum and has a horizontally long rectangular frame shape.

As shown in FIG. 7, the rear cabinet 4 is made of, for example, a synthetic resin, and has an opening (first opening) 4a, a bottom surface (first bottom surface) 4b facing the opening 4a, and a side surface 4c provided around the bottom surface 4b. And has a box shape.
As shown in FIGS. 3 and 6, there is an inclined portion (inclined surface) 53 inclined with respect to the opening 4a between the upper end portion of the bottom surface of the rear cabinet 4 and a lower side of about one fifth in the height direction. A curved portion (curved surface) 54 that is connected to the inclined portion 53 and gently curved is provided.
A small box-like cover 51 is projected below the central portion in the lateral direction of the rear cabinet 4.
The inclined portion 53 faces the LED substrate of the display module 3, and the cover portion 51 is arranged to face the main substrate.

The rear cabinet 4 has two terminal panels in which an input terminal, an output terminal, an antenna input terminal, a USB terminal, a headphone terminal, a B-CAS card insertion slot, and the like are provided on one short side (the right side in FIG. 2). 52.
The rear cabinet 4 includes an inclined portion 53 and a curved portion 54, a central portion on the other short side, one side of the upper portion of the cover portion 51, both sides below the cover portion 51, and a lower portion of the central portion of the cover portion 51. Are provided with heat radiating portions 40, 46, 47, 48, 49 and 50, respectively. Each of the heat radiating portions 40, 46, 47, 48, 49, 50 has a plurality of concave portions recessed inwardly and horizontally, and a plurality of holes are provided in the bottom surface (second bottom surface) of each concave portion.

  As shown in FIGS. 5 and 7, the heat radiating portion 40 has concave portions 41, 42 that are recessed inward in order from a position slightly below the upper end portion of the inclined portion 53, and are rectangular in front view. 43, 44 and 45 are provided. The lengths of the recesses 41, 42, 43, 44, 45 are shorter in this order, that is, the lengths of the recesses are gradually longer along the inclination direction. A plurality of the concave portions 41, 42, 43, 44, 45 are arranged side by side in the lateral direction.

  The bottom surface of the concave portion 41 is provided with rectangular holes 41a and 41b. The bottom surface of the inner wall of the concave portion 41 is longer in depth than the top surface, and the side surface has a substantially trapezoidal shape. The lengths of the holes 41a and 41b are equal. The side surface of the concave portion 41 has a draft, and the angle of the opening (second opening) 41c with this gradient gradually decreases downward as in the concave portion 43 described later. As a result, as will be described later, the lateral width of the bottom surface of the recess 41 and the surface of the opening 41c is uniform, and the bottom surface and the opening surface are both rectangular.

  A recess 42 is provided at a slight distance from the recess 41 in the downward direction. The bottom surface of the recess 42 is provided with holes 42a and 42b having the same length as the hole 41a. The slope of the side surface of the recess 42 with respect to the peripheral edge portion of the opening 42 c gradually decreases in the downward direction, like the recess 43. Therefore, both the bottom surface and the surface of the opening 42c are rectangular.

  A concave portion 43 is provided in a curved portion 54 that is slightly spaced downward from the concave portion 42. Holes 43a, 43b, and 43c having the same length as the hole 41a are provided on the bottom surface of the recess 43. The gradient of the side surface of the recess 43 with respect to the peripheral portion of the opening 43d gradually decreases in the downward direction, such as 9 °, 6 °, 4.5 °, 3.5 °, and 3 °. Therefore, both the bottom surface and the surface of the opening 43d are rectangular.

  A recess 44 is provided at a slight distance from the recess 43 in the downward direction. Holes 44a, 44b, 44c, and 44d having the same length as the hole 41a are provided on the bottom surface of the recess 44. The slope of the side surface of the recess 44 with respect to the peripheral edge of the opening 44e gradually decreases in the downward direction like the recess 43. Accordingly, the bottom surface and the surface of the opening 44e are both rectangular.

  A recess 45 is provided at a slight distance from the recess 44 in the downward direction. Holes 45a, 45b, 45c, and 45d having the same length as the hole 41a are provided on the bottom surface of the recess 45. The slope of the side surface of the recess 45 with respect to the peripheral edge of the opening 45e gradually decreases in the downward direction, like the recess 43. Therefore, both the bottom surface and the surface of the opening 45e are rectangular.

8 is a schematic perspective view showing the recess 43, FIG. 9 is a schematic cross-sectional view of the recess 43, FIG. 10A is a front view of the recess 43, FIG. 10B is a cross-sectional view taken along the line BB of FIG. FIG. 10D is a sectional view taken along the line D-D in FIG. 10A.
As shown by the thin line in FIG. 10, the recess 43 has a vertical position on the side surface of the recess 43 so that the width of the surface of the opening 43d of the recess 43 is constant and the width of the holes 43a, 43b, 43c is constant. Are formed using a mold whose draft is determined. That is, in the recess 43, the gradient of the side surface with respect to the opening peripheral edge portion gradually decreases downward, and the side surface is inclined from the opening peripheral edge portion toward the outer surface of the hole so that the surface and the bottom surface of the opening 43d form a rectangular shape. It will be.

  Similarly, the other concave portions 41, 42, 44, 45 are formed by changing the gradient of the side surface with respect to the opening peripheral portion of the side surface according to the vertical position of the side surface so that the lateral width of the opening surface and the bottom surface becomes uniform. Therefore, the shape and size of the bottom surface and the opening surface can be made uniform between the recesses 41, between the recesses 42, between the recesses 43, between the recesses 44, and between the recesses 45, respectively. And as shown in this Embodiment, the shape and magnitude | size of hole 41a, 41b, 42a, 42b, ... can also be made uniform between different recessed parts 41,42,43,44,45.

As shown in FIG. 5, the row of the recesses 41 and the row of the recesses 43 have portions where the arrangement of the holes on the bottom surface is different from the others, but in this way, the arrangement of some holes in the row of the depressions May be changed. Also in this case, the lateral widths of the opening surface and the bottom surface of the recess can be made uniform.
Further, when the other heat radiating portions 46, 47, 48, 49, 50 are also formed on an inclined surface or a curved surface, similarly, the opening peripheral portion of the side surface is set so that the lateral width of the opening surface and the bottom surface is uniform. The gradient is changed according to the vertical position of the side surface.

  In the TV receiver 1 according to the present embodiment configured as described above, the concave portions 41, 42, 43, 44, 45 provided in the inclined portion 53 or the curved portion 54 have the lower surface of the inner wall of the concave portion 41 from the upper surface. Since the depth length is long and the side surface has a substantially trapezoidal shape, when water enters, the water stays on the bottom surface, and the intrusion into the inside is well suppressed.

And since the width of a bottom face and an opening surface is respectively constant, and a bottom face and an opening face make rectangular shape, the heat which arises from a LED board etc. can be uniformly radiated from a bottom face toward an opening face. Further, the pitch in the horizontal direction can be taken as in the case where the concave portion having the rectangular opening surface is provided in the flat portion, and a large number of concave portions can be provided, and the heat radiation efficiency is good. Moreover, since the shape of a recessed part is uniform, an external appearance is favorable.
Furthermore, not only an inclined surface inclined in one direction but also a curved surface having a complicated shape can be provided with a concave portion without breaking the shape of the bottom surface and the opening surface of the concave portion, so that a thinner feeling can be obtained. The rear cabinet 4 can be designed.
And since a recessed part can be provided in any surface of a plane, an inclined surface, and a curved surface, there is no restriction | limiting in the range which provides a thermal radiation part, and it corresponds to the several heat-emitting part of the display module 3, and rear The cabinet 4 can be provided with a heat radiating portion, and the heat radiation efficiency is improved.

As described above, the housing (rear cabinet 4) according to the present invention has the first opening (4a), and the inclined surface (53) or the outer side of the bottom surface (4b) facing the first opening. It has a curved surface (54), has a plurality of concave portions (41, 42, 43, 44, 45) recessed inwardly on the inclined surface or curved surface, and holes (41a, 42a) on the second bottom surface of the concave portion , 43a, 44a, 45a, etc.), the peripheral surface of each recess is inclined with respect to the peripheral edge of the second opening (41c, 42c, 43d, 44e, 45e) of the recess. The gradient of the peripheral surface with respect to the peripheral portion corresponds to the circumferential position of the peripheral surface, and the gradient is larger as the distance between the second opening and the second bottom surface is shorter .

In the present invention, the shape of the bottom surface and the opening surface of the recess can be made the same. Therefore, heat can be uniformly radiated from the bottom surface toward the opening surface. Further, the shape and size of the bottom surface and the opening surface of the recesses can be made uniform between the recesses arranged side by side in the lateral direction, the pitch of the arrangement can be made uniform, and a large number of recesses can be provided. Since the shape, size, and pitch of the recesses can be optimized, the recesses can be provided without limitation on any part of the housing such as a flat surface and an inclined surface, and the degree of freedom of arrangement of the recesses is high. In combination, the heat dissipation efficiency can be improved.
And since the shape of a recessed part, a magnitude | size, etc. can be made uniform, an external appearance is favorable. Moreover, not only the inclined surface inclined in one direction but also the curved surface having a complicated shape can be provided with a concave portion without breaking the shape of the bottom surface and the opening surface of the concave portion. Can be designed.

The housing (4) according to the present invention is characterized in that the second bottom surface is substantially parallel to the surface of the first opening.

  In the present invention, the intrusion of water is better suppressed.

  The housing (4) according to the present invention is characterized in that a surface and a bottom surface of the second opening are rectangular.

  In the present invention, the bottom surface and the opening surface are rectangular, and the lateral widths of the bottom surface and the opening surface are uniform. Therefore, heat can be uniformly dissipated in the extending direction of the recess. And a recessed part can be arranged side by side effectively in length and breadth, heat dissipation efficiency becomes more favorable, and an external appearance becomes more favorable.

  The display device according to the present invention includes a display unit (3) and any one of the above-described casings (4) covering the display unit.

  In the present invention, it is possible to improve the heat dissipation and appearance of the housing of a display device having a complicated bottom shape in order to reduce the thickness and size.

  A TV receiver (1) according to the present invention includes the display device described above and a receiving unit (7) that receives a television broadcast, and the display device is based on the television broadcast received by the receiving unit. An image is displayed on the screen.

  In the present invention, it is possible to reduce the thickness and size, and to improve the heat dissipation and appearance of the housing of a TV receiver having a complicated bottom shape.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is not intended to include the above-described meanings, but is intended to include meanings equivalent to the claims and all modifications within the scope of the claims.

  For example, in the above-described embodiment, the case where the opening surface and the bottom surface of the recesses (41, 42, 43, 44, 45) are rectangular has been described, but the present invention is not limited to this. The surface and the bottom surface can have other shapes. Regardless of the shape, according to the present invention, the shape and size of the opening surface and the bottom surface of the recess can be made uniform between the recesses.

  In the above-described embodiment, the case where the casing of the present invention is applied to the rear cabinet 4 of the TV receiver has been described. However, the present invention is not limited to this, and the present invention is not limited to this. It is possible to apply to the housing | casing which covers this heat generating body.

DESCRIPTION OF SYMBOLS 1 TV receiver 2 Front cabinet 3 Display module 31 Display panel 4 Rear cabinet 4a Opening 4b Bottom surface 4c Side surface 40, 46, 47, 48, 49, 50 Heat radiation part 41, 42, 43, 44, 45 Recessed part 41a, 41b, 42a 42b, 43a, 43b, 43c, 44a, 44b, 44c, 44d, 45a, 45b, 45c, 45d Hole 41c, 42c, 43d, 44e, 45e Open 53 Inclined portion 54 Curved portion 6 Stand 7 Tuner 8 Decoder

Claims (5)

Having a first opening, having an inclined surface or a curved surface outside the first bottom surface facing the first opening, and having a plurality of recesses recessed inwardly on the inclined surface or curved surface, In the housing in which a hole is provided in the second bottom surface of the recess,
The peripheral surface of each recess is inclined with respect to the peripheral edge of the second opening of the recess,
The case is characterized in that the gradient of the peripheral surface with respect to the peripheral edge portion corresponds to the circumferential position of the peripheral surface, and is larger as the distance between the second opening and the second bottom surface is shorter . The housing according to claim 1, wherein the second bottom surface is substantially parallel to a surface of the first opening. The housing according to claim 2 , wherein the surface of the second opening and the second bottom surface have a rectangular shape. A display unit;
A display device comprising: the casing according to any one of claims 1 to 3 covering the display unit. A display device according to claim 4 ;
A receiver for receiving television broadcasts,
A television receiver, wherein an image is displayed on the display device based on the television broadcast received by the receiving unit.

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