JP2009271373A - Case for display device and display device equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a case for display device and a display device equipped with the same, which can be manufactured at low manufacturing cost, by mounting a circuit substrate for performing control to make a display device display an image. <P>SOLUTION: The display device comprises: a chassis main body 211 of an approximately flat shape, which includes a plurality of hollow ribs 214 in line along an extrusion direction by profile extrusion using a resin material, and which includes a reflective face 211A which approximately faces a plane of an opposing side of a display area of a liquid crystal display (LCD) 300, and a substrate mounting face 211B; and a concave shape dress member 219 in which a storage space for storing a circuit substrate 410 together with a substrate mounting face 211B of the chassis main body 211. In the substrate mounting face 211B of the chassis main body 211, a substrate support section 500 is unitedly protruded in line in an extrusion direction so that the circuit substrate 410 can be mounted. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a housing for a display device and a display device including the housing.

In recent years, thin large-sized liquid crystal televisions having a screen size exceeding 40 inches have been developed.
Such a liquid crystal display device is roughly composed of a liquid crystal panel, a backlight chassis, an electric circuit, an outer housing as a so-called back cover, and a front frame cover.
For example, a configuration is known in which the backlight chassis is formed by extrusion that can reduce the manufacturing cost relatively (see, for example, Patent Document 1).

  Patent Document 1 discloses a backlight reflector of a liquid crystal display device in which a reflective layer is formed on the surface of a substrate formed in a shape that is repeatedly bent. In addition, it is also shown that the base of the backlight reflector is made of a synthetic resin profile extrusion molding.

JP 2002-156512 A

  However, Patent Document 1 does not show a configuration in which a circuit board that performs control for displaying an image on a liquid crystal display device is provided on a backlight reflector.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a housing for a display device that can be manufactured at a reduced manufacturing cost, to which a circuit board that performs control for displaying an image on the display device is attached, and a display device including the housing. With the goal.

The display device main body of the present invention is provided with a panel-like display device main body having a display area for displaying an image on a single plane and a circuit board for controlling the display of the display device main body. A display device housing that houses the display device main body with the display area facing an outer surface, a facing surface that substantially faces a plane opposite to the display region of the display device main body, and the facing A chassis having a substrate mounting surface opposite to the surface and having a plurality of hollow ribs formed in a series along the extrusion direction by profile extrusion using a resin material. A circuit board mounting portion to which the circuit board can be mounted is integrally projected on the mounting surface in the extrusion direction.
In this invention, since the circuit board mounting portion protrudes from the board mounting surface, for example, compared to the case where the circuit board mounting portion is mounted in the space inside the chassis, the mold design is simplified and manufactured. Cost can be reduced. Moreover, since the circuit board mounting portion is formed integrally with the chassis by extrusion molding, the manufacturing process can be simplified.

Moreover, in this invention, it is preferable to provide the concave decorative member attached to the said chassis and partitioning and forming the storage space which accommodates the said circuit board with the board | substrate mounting surface of the said chassis.
In this invention, since the decorative member is a separate member from the chassis, for example, the decorative member can be molded by injection molding so that the decorative member has high design. And the structure which attaches a decorative member to a circuit board attaching part may be sufficient. In this configuration, the circuit board mounting portion can be shared as a decorative member mounting portion to which the decorative member is mounted.

In the present invention, it is preferable that the chassis and the decorative member are made of a material having high electromagnetic shielding properties.
When the display device is increased in size, the output voltage is increased and a large electromagnetic wave may be generated. However, in this invention, since the chassis and the decorative member are formed of a material having high electromagnetic shielding properties, the influence of electromagnetic waves on the outside of the display device can be reduced. For example, the influence on an electronic device or a human body outside the display device can be reduced. As a material with high electromagnetic shielding properties, for example, a thermoplastic resin composition containing 10 to 50% carbon fiber is preferable. Examples of the thermoplastic resin composition include polycarbonate. In addition, when the electromagnetic shielding property of the chassis and the decorative member is low, the circuit board may be formed of a material having a high electromagnetic shielding property.

And in this invention, it is preferable that the edge part of the said decorative member was fixed to the hollow rib of the said chassis.
In this invention, the decorative member of the chassis can be further strongly fixed by fixing the decorative member to the hollow rib provided inside the chassis.

Further, in the present invention, the board mounting surface of the chassis has a plurality of rib connecting portions that are connected to the hollow rib, and the circuit board mounting portion is connected to the other rib connecting portion adjacent to the one rib connecting portion. It is preferable to arrange | position between these parts.
In the present invention, the display device generates heat when the light source emits light, and the generated heat may be transmitted to the hollow rib through the facing surface of the chassis. However, since the circuit board mounting portion is disposed between one rib connecting portion and the other rib connecting portion, the circuit board mounting portion is relatively separated from each hollow rib, so that heat is applied to the circuit board mounting portion. Difficult to communicate. Accordingly, it is possible to prevent inconveniences such as failure of the circuit board attached to the circuit board attaching portion due to heat.

In the present invention, it is preferable that the circuit board is supported at the tip of the circuit board mounting portion in a state where the plane is substantially opposed to the board mounting surface with a predetermined gap.
In this invention, when the light source is attached to the display device, heat is generated by the light source emitting light, but the substrate support portion is disposed between one rib connecting portion and the other rib connecting portion. Since they are relatively separated from the respective hollow ribs, it is difficult for heat to be transmitted to the substrate support portion. Therefore, inconveniences such as failure of the circuit board attached to the board support portion due to heat can be prevented.

Furthermore, in the present invention, it is preferable that a plurality of the circuit board mounting portions protrude and an engagement portion capable of sandwiching the circuit board is provided at the tip of a pair of the circuit board mounting portions adjacent to each other. .
In this invention, since the circuit board is clamped by the engaging part of the circuit board mounting part, the circuit board can be stably fixed.

The display device of the present invention includes the above-described display device body and the above-described display device casing.
In this invention, since the display device includes the above-described housing, it is possible to manufacture a display device to which a circuit board can be attached at a low manufacturing cost.

Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the drawings.
In this embodiment, a liquid crystal display device such as a liquid crystal television or a monitor provided with a liquid crystal display (LCD) is exemplified as the display device, but the present invention is not limited to this, and an illumination device or the like may be used.
FIG. 1 is a perspective view showing a display device according to the present embodiment. FIG. 2 is a cross-sectional view showing a chassis of the display device. FIG. 3 is a perspective view showing the relationship between the chassis and the decorative member.

[Configuration of display device]
As shown in FIGS. 1 and 2, the display device 100 of the present embodiment is a so-called thin display device 100, and is a device that displays image data input to an input terminal (not shown) on a screen. The display device 100 includes a housing 200, an LCD 300 as a display device body, a display control unit 310 that displays an image on the LCD 300, and the like. In FIG. 1, the LCD is omitted for convenience of explanation.

The housing 200 fixes the LCD 300, the display control means 310, and the like.
The housing 200 includes a substantially rectangular chassis 210 in a plan view, and fitting members 220 that are fitted to both ends of the chassis 210 in the longitudinal direction.
The chassis 210 is made of, for example, a thermoplastic resin such as polycarbonate (PC) having high heat dissipation.

The chassis 210 includes a substantially flat chassis main body 211 and an upright portion 212 formed to rise from both side edges in the longitudinal direction of the chassis main body 211. That is, the chassis 210 has a concave cross section.
Both ends of the chassis body 211 in the longitudinal direction are formed as flat free ends 213. When the chassis 210 is molded, the free end 213 of the chassis 210 absorbs stress due to thermal linear expansion and prevents thermal deformation.
The upright portion 212 has a control housing recess 212A capable of housing an electrical unit such as an electrode.

Next, the internal structure of the chassis body 211 will be described. Since the chassis main body 211 is formed so that the cross section in the direction substantially orthogonal to the longitudinal direction is substantially symmetrical, about the part of the chassis main body 211 in the vicinity of the left upright portion 212 of the two upright portions 212 shown in FIG. This will be described with reference to FIG.
As shown in FIG. 2, the chassis body 211 is formed by profile extrusion, and a plurality of hollow ribs 214 are formed in a series in the longitudinal direction that is the extrusion direction.
The hollow ribs 214 are formed at a predetermined interval from one upright 212 to the other upright 212, and the cross section of the internal space is substantially rectangular. For this reason, the hollow rib 214 is formed in a substantially ladder shape in a sectional view.
The interval between the plurality of hollow ribs 214 is 20.0 mm or more and 300 mm or less, and more preferably the interval between each other is 30.0 mm or more and 200 mm or less. Here, if the interval between the hollow ribs 214 is less than 20.0 mm, molding may be difficult. On the other hand, if it exceeds 300 mm, the rigidity may decrease.

Further, as shown in FIG. 2, the chassis main body 211 has a reflecting surface 211A as a facing surface substantially facing the LCD 300, and a board mounting surface 211B opposite to the reflecting surface 211A.
A substantially wedge-shaped reinforcing rib 211C is integrally provided on the reflecting surface 211A.
The upright portion 212 corresponds to the size of the control unit 400 such as an electrode, and has a groove-shaped control housing recess 212A that opens to the upper end side.

The LCD 300 is constructed by an upper end portion of one upright portion 212 and an upper end portion of the other upright portion 212 and is fixed by two fitting members 220.
A display control unit 310 is disposed between the LCD 300 and the reflection surface 211A of the chassis main body 211. The display control means 310 includes a cold cathode fluorescent light source (CCFL) as a light source whose axial direction is arranged along the longitudinal direction of the chassis main body 211, and a reflective layer that reflects the light of the light source 311. 312 and a diffusion plate 313 erected on the upright portions 212 of each other. The light source 311 is arranged in parallel between the respective reinforcing ribs 211C. The reflection layer 312 is laminated on the reflection surface 211 </ b> A, and is formed in multiple colors simultaneously with the profile extrusion of the chassis 210. The reflective layer 312 is made of foamed polyethylene terephthalate (PET) resin. The diffusion plate 313 is made of polystyrene (PS) resin or PC resin.

In addition, the board mounting surface 211 </ b> B of the chassis body 211 has a plurality of rib connecting portions 214 </ b> A that are connected to the hollow ribs 214. Between one rib coupling portion 214A and another adjacent rib coupling portion 214A, a board support portion 500 as a board mounting portion protrudes integrally with the chassis main body 211 at a substantially intermediate position from each rib coupling portion 214A. Has been. The substrate support portions 500 are provided in series along the extrusion direction of the chassis 210.
Concave mounting grooves 501 are formed in a series in the extrusion direction at the tip of the substrate support 500. The circuit board 410 is attached to the attachment groove 501 with a screw 502 such as a self-tap, for example. The circuit board 410 is a substantially flat plate having a circuit surface 411 on which a circuit is formed, and a plane opposite to the circuit surface 411 is substantially opposed to the board mounting surface 211B.

  As shown in FIG. 1, the fitting member 220 has groove-like fitting portions 221 corresponding to the shapes of both end portions of the chassis 210 in the longitudinal direction. Both ends in the longitudinal direction of the upper part 212 are fitted. The fitting part 221 has a light source support part 222 that supports both ends of the light source 311, and the light source support part 222 has a light source insertion hole into which an end part of the light source 311 is inserted.

As shown in FIGS. 2 and 3, a decorative member 219 is attached to the outer peripheral portion of the housing 200.
The decorative member 219 is formed in a concave shape by injection molding. In addition, the decorative member 219 defines a storage space for storing the circuit board 410 together with the board mounting surface 211 </ b> B of the chassis main body 211.
A screw hole 601 is formed in each of the standing upper end portion 219A, the upright portion 212, and the hollow rib 214 of the decorative member 219. With these screw holes 601 being substantially continuous, the screw hole 601 is self-tapped, for example. Or the like. As a result, the decorative member 219 is fixed to the chassis 210.

  In addition, the decorative member 219 has a back surface portion 219 </ b> B that covers the back surface of the housing 200. The back surface portion 219B may be formed with an air circulation hole (not shown) through which air can flow.

[Effect of the embodiment]
According to the display device 100 as described above, the following effects can be obtained.
The display device 100 of the present embodiment has a reflective surface 211A and a substrate mounting surface 211B that are substantially opposed to a plane opposite to the display area of the LCD 300, and along the extrusion direction by profile extrusion using a resin material. A chassis body 211 formed in a substantially flat plate shape having a plurality of hollow ribs 214 as a series, and a makeup formed in a concave shape that defines a storage space for housing the circuit board 410 together with the board mounting surface 211B of the chassis body 211. The board support surface 500 to which the circuit board 410 can be attached is integrally projected in the extrusion direction on the board attachment surface 211B of the chassis main body 211.
For this reason, since the substrate support portion 500 protrudes from the substrate mounting surface 211B, for example, compared to the case where the substrate support portion 500 is provided in the space inside the chassis 210, the mold design is simplified and manufactured. Cost can be reduced.
Moreover, since the board | substrate support part 500 is shape | molded integrally with the chassis 210 by profile extrusion, a manufacturing process can be simplified.

Further, the decorative member 219 was formed by injection molding.
In general, various designs can be applied to a molded article by using injection molding. For this reason, the decorative member 219 with high designability can be manufactured.

The resin material of the chassis 210 is polycarbonate.
For this reason, since polycarbonate is a relatively inexpensive resin material, the chassis 210 can be manufactured at a low manufacturing cost.

The end of the decorative member 219 was fixed to the hollow rib 214 of the chassis 210.
For this reason, by fixing the decorative member 219 to the hollow rib 214 provided inside the chassis 210, the decorative member 219 of the chassis 210 can be further strongly fixed.

A plurality of rib connection portions 214A that are connected to the hollow ribs 214 are provided on the substrate mounting surface 211B of the chassis 210, and the substrate support portion 500 is positioned at an intermediate position between one rib connection portion 214A and another adjacent rib connection portion 214A. Arranged.
For this reason, the display device 100 generates heat when the light source 311 emits light, but the substrate support portion 500 is disposed between the one rib connecting portion 214A and the other rib connecting portion 214A. Therefore, it is difficult for heat to be transmitted to the substrate support portion 500. Therefore, inconveniences such as failure of the circuit board 410 attached to the board support portion 500 due to heat can be prevented.

The circuit board 410 was supported at the tip of the board support portion 500 in a state where the plane substantially faces the board mounting surface 211B with a predetermined gap.
Therefore, even when heat is generated by the light source 311 and this heat is transferred to the board mounting surface 211B via the hollow rib 214, the circuit board 410 is supported with a predetermined gap from the board mounting surface 211B. Therefore, the heat of the chassis 210 is not easily transmitted, and the circuit board 410 can be further prevented from being damaged by the heat.

The display device 100 is provided with the LCD 300 and the above-described casing 200.
For this reason, since the display apparatus 100 includes the above-described casing 200, the display apparatus 100 to which the circuit board 410 is attached can be manufactured at a reduced manufacturing cost.

[Modification of Embodiment]
The aspect described above shows one aspect of the present invention, and the present invention is not limited to the above-described embodiment, and within the scope of achieving the objects and effects of the present invention. Needless to say, the modifications and improvements are included in the contents of the present invention. In addition, the specific structure and shape in carrying out the present invention may be used as other configurations within the scope of achieving the object and effect of the present invention.
FIG. 4 is a cross-sectional view illustrating a chassis of a display device according to another embodiment.

For example, the chassis 210 has a configuration formed of a thermoplastic resin such as polycarbonate (PC) having a high heat dissipation property, but is not limited thereto.
For example, the chassis 210 and the decorative member 219 may be formed of a material having high electromagnetic shielding properties.
In this case, the influence of electromagnetic waves on the outside of the display device 100 can be reduced. For example, the influence on an electronic device or a human body outside the display device 100 can be reduced. As a material with high electromagnetic shielding properties, for example, a thermoplastic resin composition containing 10 to 50% carbon fiber is preferable. Examples of the thermoplastic resin composition include polycarbonate. In addition, when the electromagnetic shielding property of the chassis and the decorative member is low, the circuit board may be formed of a material having a high electromagnetic shielding property.

And although the structure which the attachment groove | channel 501 which can attach the circuit board 410 with the screw | thread 502 was provided in the front-end | tip part of the board | substrate support part 500 was shown, it is not restricted to this. For example, as shown in FIG. 4, a pair of second substrate support portions 503 may be disposed adjacent to each other, and the pair of second substrate support portions 503 may sandwich the circuit board 410. Specifically, one second substrate support portion 503 and the other second substrate support portion 503 have support facing surfaces 504 that face each other. The support facing surfaces 504 are each formed with a notch engaging portion 505 that can engage an end portion of the circuit board 410. These notch engaging portions 505 are formed in series along the pushing direction of the chassis 210. The notch engaging portions 505 are formed when the chassis 210 is extruded.
In this case, the circuit board 410 can be stably supported because the circuit board 410 is sandwiched by forming the notch engaging portion 505 on the support facing surface 504. Further, in this case, unlike the present embodiment, the screw 502 is not required when fixing the circuit board 410, so that the number of parts is reduced and the manufacturing cost can be reduced. Furthermore, in this case, the notch engaging portions 505 are formed in a concave shape that is a series along the extruding direction and can be engaged with both end portions of the circuit board 410, and therefore corresponds to the concave notch engaging portions 505. By designing the mold in this manner, the notch engaging portion 505 can be easily formed when the chassis 210 is extruded. Further, when the circuit board 410 is attached by making the notch engaging portion 505 concave, it can be attached by inserting the circuit board 410 into the notch engaging portion 505 along the longitudinal direction.

  In the configuration as shown in FIG. 4, when the circuit board 410 is inserted into the notch engaging portion 505, the surface opposite to the circuit surface 411 on which the circuit is formed is the substrate mounting surface 211B of the chassis 210. You may insert in the state which opposes. In this case, the circuit surface 411 of the circuit board 410 is not easily affected by the heat generated by the CCFL 311, so that the circuit board 410 can be prevented from being damaged. Furthermore, if the circuit board 410 has a high rigidity, such as a glass epoxy board or a ceramic board, the rigidity of the chassis 210 is improved when the pair of notch engaging portions 505 sandwich the circuit board. You can also.

Moreover, although the decorative member 219 showed the structure formed by injection molding, it is not restricted to this. For example, the decorative member 219 may be formed by multicolor molding simultaneously with the extrusion molding of the chassis 210.
In this case, since the decorative member 219 and the chassis 210 can be molded simultaneously, the manufacturing process can be simplified.

  The present invention can be used for display devices such as liquid crystal televisions and monitors.

The perspective view which shows the display apparatus in this embodiment. Sectional drawing which shows the chassis of a display apparatus. The perspective view which shows the relationship between a chassis and a decorative member. Sectional drawing which shows the chassis of the display apparatus in other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Display apparatus 200 ... Housing | casing 210 ... Chassis 211A ... Reflecting surface 211B as an opposing surface ... Substrate mounting surface 214 ... Hollow rib 214A ... Rib coupling part 219 ... Cosmetic member 300 ... As a display apparatus main body Liquid crystal display (LCD)
500 …… Board support

Claims (8)

A panel-shaped display device main body having a display area for displaying an image on one plane and a circuit board for controlling display of the display device main body are attached, and the display area of the display device main body faces the outer surface, A housing for a display device that houses a display device body,
The display device main body has a facing surface substantially opposite to a plane opposite to the display area of the display device main body, and a substrate mounting surface opposite to the facing surface, and is a series along the extrusion direction by profile extrusion using a resin material. A chassis formed into a substantially flat plate shape having a plurality of hollow ribs,
A housing for a display device, wherein a circuit board mounting portion to which the circuit board can be mounted is integrally projected in a pushing direction on the board mounting surface of the chassis. A housing for a display device according to claim 1,
A housing for a display device, comprising a concave decorative member attached to the chassis and defining a storage space for storing the circuit board together with a board mounting surface of the chassis. A housing for a display device according to claim 2,
The chassis for a display device, wherein the chassis and the decorative member are made of a material having high electromagnetic shielding properties. A housing for a display device according to claim 2 or claim 3,
The casing for a display device, wherein an end of the decorative member is fixed to a hollow rib of the chassis. A housing for a display device according to any one of claims 1 to 4,
The chassis mounting surface of the chassis has a plurality of rib connecting portions that are connected to the hollow ribs.
The case for a display device, wherein the circuit board attaching portion is disposed between one rib connecting portion and another adjacent rib connecting portion. A housing for a display device according to any one of claims 1 to 5,
The casing for a display device, wherein the circuit board is supported at a tip of the circuit board mounting portion in a state where a plane is substantially opposed to the board mounting surface with a predetermined gap. A housing for a display device according to claim 6,
A plurality of the circuit board mounting portions are provided to protrude,
A housing for a display device, wherein an engagement portion capable of sandwiching the circuit board is provided at the tip of a pair of circuit board mounting portions adjacent to each other. A display device main body according to any one of claims 1 to 7,
A display device comprising: the housing for the display device according to any one of claims 1 to 7.

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