JP5113468B2 - Image display device - Google Patents

Description

  The present invention relates to a large-sized image display device employing, for example, a liquid crystal display (LCD) or a plasma display (PDL), and more particularly to a support structure for a panel module constituting the large-sized display device.

  In recent years, with the digitization and high definition of television broadcasts, large and thin image display devices are required as so-called television receivers that receive and display broadcast television broadcasts, As image display devices that satisfy such requirements, devices that employ a liquid crystal display (LCD) or a plasma display (PDL) in addition to conventional projection display devices are widely available on the market. And various support structures including the external structure of the apparatus in such a large-sized and thin image display apparatus are already known by the following patent documents 1-5, for example.

Japanese Patent Laid-Open No. 2007-159048 JP 2004-151305 A Japanese Patent Laid-Open No. 2004-21104 JP 2001-100650 A Japanese Patent Laid-Open No. 11-109879

  In general, in the manufacture of such a large and thin image display device, for example, in an image display device employing a liquid crystal display (LCD) as a display device, a large liquid crystal display (LCD) including a reflector and a backlight device is used. A power source for preparing a predetermined-shaped casing (including a frame and a back plate) together with the panel module integrated therein, and supplying desired power to the apparatus together with the panel module inside the casing A substrate, a drive circuit substrate for driving the display device based on various input signals (video signals), and the like are incorporated.

  By the way, in the above-mentioned large and thin image display device, the power supply substrate, the drive circuit substrate, and the like are arranged in a frame of the panel module so as to be disclosed in the above-mentioned Patent Documents 1 to 4 and the like. A structure that is attached to the body or back side is widely adopted. In addition, in recent years, as the screen size is further increased, the area of the panel module is also increased.

  In such a panel module, a backlight device (such as a thin fluorescent tube) is generally arranged in a frame (bottom) formed in a thin box shape by using a metal plate such as aluminum as a light reflecting plate. It is constructed by fixing a large liquid crystal display (LCD) on its surface. However, with the increase in the area of the panel module described above, it is necessary to ensure the mechanical strength of the panel module. For example, as disclosed in the above-mentioned Patent Document 5, the back side of the flat panel is required. Has proposed a structure in which a shape along a diagonal line connecting the four corners, that is, an X-shaped support member is provided.

  However, the above-described prior art, particularly the structure provided with the X-shaped support member disclosed in Patent Document 5 described above is a problem in reducing the thickness of the image display device, and is not necessarily a support structure suitable for practical use. It was not.

  Therefore, the present invention has been achieved in view of the above-described problems in the prior art, and more specifically, while solving the problems associated with the increase in the area of the panel module due to the enlargement of the image display device. An object of the present invention is to provide an image display device suitable for thinning the device, including a mounting structure for a power supply board, a drive circuit board, and the like on the back surface of the panel module, and a support structure thereof.

  In order to achieve the above-described object, according to the present invention, there is firstly provided an image display device in which a panel module in which a display element is mounted on a thin plate-like frame having a substantially rectangular outer shape is mounted in a large casing. Thus, there is provided an image display device characterized in that a reinforcing portion is further formed on the flange portion formed along the outer periphery of the thin plate frame constituting the panel module.

  Further, in the present invention, in the image display device described above, it is preferable that the reinforcing portion is formed by bending a flange portion on the outer periphery of the frame into a predetermined cross-sectional shape by drawing. It is preferable to form the flange on the outer periphery of the frame by drawing into a substantially U-shaped cross section, a substantially circular or semicircular cross section, or a substantially triangular cross section.

  According to the invention, in the image display device described above, the reinforcing portion is fixed to the pipe-shaped member along the flange portion on the outer periphery of the frame, and the pipe-shaped members adjacent to each other. You may form by fixing between between with an "L" -shaped member. Furthermore, you may attach the leg part of an apparatus using the said reinforcement part formed in the collar part of the said flame | frame.

  According to the present invention, the problems associated with the increase in the area of the panel module due to the increase in the size of the image display device are eliminated, that is, the panel module having excellent mechanical strength is easily and inexpensively manufactured. Therefore, it is possible to provide an image display device suitable for increasing the size and thickness of the device.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, a liquid crystal display (LCD) is adopted as a large-sized image display device. Hereinafter, the image display device employing the liquid crystal display will be described together with its support structure.

  First, attached FIG. 1 shows an overall configuration of an image display apparatus according to an embodiment of the present invention in a developed view. In this figure, reference numeral 100 denotes a liquid crystal as a large-sized image display apparatus. A display (LCD) is shown. In addition, this liquid crystal display (LCD) is usually an opening side of a frame 110 in which, for example, a thin aluminum plate is formed in a box shape with a shallow bottom and a large area with a schematic cross section formed in a “U” shape. Hereinafter, this is referred to as a panel module. Note that the bottom surface of the frame 110 is irradiated with light from the back surface of a thin plate-like liquid crystal display (LCD) having a substantially rectangular outer shape (so-called backlight) to obtain a desired luminance. Are arranged, or a light emitter made of a light emitting diode or the like is attached. Further, as will be described in detail below, the panel module is provided with boards necessary for the apparatus such as a signal board and a power supply board, and a leg for installing the apparatus on the lower side. A portion (stand) 120 is attached.

  And, on the surface of the panel module 100 described above, for example, an outer frame body 200 usually called a bezel formed by injection molding of synthetic resin or the like is attached, and on the back side of the module, for example, A back cover (back cover) 300 formed by injection molding of synthetic resin or the like is attached.

  Next, FIG. 2 attached herewith shows a perspective view of the above-described image display device, particularly when only the panel module 100 is taken out and viewed from the back side. According to the embodiment of the present invention, as already described above, the so-called panel module machine, which is a problem particularly associated with an increase in the area of the panel module accompanying an increase in the size of the image display device. For the purpose of securing a sufficient strength, a part (outside) of the flange portion 111 formed along the outer periphery of the frame 110 that supports the panel module 100 from the back side is further bent by, for example, drawing. As shown in the partial cross section in the figure, the cross section is formed in a substantially “U” shape. That is, according to the frame-shaped reinforcing portion 112 formed by drawing on the outer peripheral flange portion 111 of the frame 110, a liquid crystal display (LCD) is easily added to the frame 110 without using an additional reinforcing material. In the panel module 100 after mounting, the mechanical strength can be ensured. Such a structure for ensuring the mechanical strength of the panel module is advantageous for reducing the manufacturing cost, and particularly for an image display device having a size of 50 inches or less. In addition, the shape of bending a part (outside) of the collar portion 111 formed along the outer periphery of the frame 110 is not limited to the above-described substantially “U” -shaped cross section. For example, FIG. As shown in FIG. 3, it may be a substantially semicircular cross section (FIG. 3A) or a shape such as a triangle (FIG. 3B).

  However, in the present invention, as the reinforcing structure for ensuring the mechanical strength of the panel module 200, the above-described structure, that is, the cross-sectional “U” shape drawn on the flange 111 on the outer periphery of the frame 110 is used. However, the present invention is not limited to the reinforcing portion 112, and any other member that can ensure the mechanical properties of the outer periphery of the frame 110 (a frame-shaped reinforcing structure with respect to the frame) may be used. As shown also, a plurality of lengths of metal pipes 400 corresponding to the outer peripheral dimensions (vertical and horizontal) of the frame 110 are prepared in advance, and the plurality of metal pipes 400 are, for example, While fixing to the part 111, it is also possible to fix between the metal pipe 400 in each corner | angular part by the member 420 of the external shape "L" shape like illustration. Such a reinforcing structure is superior to the above-described structure as a reinforcing structure for ensuring the mechanical strength of the panel module 200. In a relatively large device, for example, an image display device having a size of 50 inches or more. It will be advantageous as a reinforcing structure.

  Subsequently, returning to FIG. 2 again, the reinforcing portion 112 formed by drawing on the outer peripheral flange portion 111 of the frame 110, which is the reinforcing structure of the panel module 100, is used, A signal board 500 for performing predetermined signal processing using a video signal as an input signal of the apparatus as an input, and further supplied to each part of the panel module 200 including the signal board, are necessary for image display and driving. A structure for attaching various circuit boards including a power supply board 510 for supplying various voltage power sources will be described.

  That is, as is clear from FIG. 2 above, on the back side of the panel module 100, for example, a metal plate is formed in a predetermined shape (in this example, a substantially “U” -shaped cross section) with the central portion at the center. A plurality of (in this example, a total of three) support members 600, 600... Are formed in the vertical direction (that is, the outer periphery) using the reinforcing portions 112 formed on the outer peripheral flange 111 of the frame 110. Perpendicular to a pair of opposing reinforcements formed in the collar). In the illustrated example, the two supporting members 600 and 600 at both ends of the supporting member 600 further extend downward to form a leg portion (stand) 120 of the apparatus. Each support member 600 has an approximately cross-sectional shape in the longitudinal direction (vertical direction in the drawing) at the upper and lower positions (two locations) corresponding to the reinforcing portions 112 formed on the outer peripheral flange portion 111 of the frame 110. So-called fixing portions 610 and 610 are formed which are fitted in a groove formed in a “U” shape and fixed by a screw 611 or the like.

  According to the support member 600 described above, the fixing portions 610 and 610 formed at the upper and lower positions (two locations) thereof are the reinforcing portions 112 (that is, the reinforcing structure for ensuring the mechanical strength of the panel module 100 (that is, Since the frame-shaped reinforcing portion 111 is fixed to the flange portion 111) and is not directly attached to the back surface of the frame 110, that is, not fixed to the panel module 200, a load is applied to the panel module 100. It has a structure that does not hang. Note that, in the above, an example is shown in which the two supporting members 600, 600 at both ends extend downward to form the leg portion (stand) 120 of the device. This is advantageous because the load from the (stand) 120 can be avoided from being applied directly to the panel module 100. However, the present invention is not limited to this, and the two support members 600 and 600 at both ends may have the same structure as the support member 600 at the center. In such a case, for example, it may be preferable to attach the leg part (stand) 120 to, for example, the central part of the lower side using the reinforcing part 112 formed on the lower side of the panel module 100.

  The signal board 500 and further the power board 510 and the like described above use the plurality of support members 600, 600... In a narrow space left on the back side of the panel module 200. It becomes possible to mount efficiently. That is, as shown in the figure, the signal board 500 and the power supply board 510 are each provided with holding parts 501 and 511 formed on a part of the board (in this example, corners), for example, as described above. Are attached to the supporting members 600, 600... By screws 611 or the like. Here, as shown by a broken line in the figure, a so-called terminal board provided with a plurality of terminals for connecting the device to the outside is provided separately from the signal board 500 described above (for example, the signal The lower part of the substrate 500 is preferable because it can be easily changed by changing the destination of the product.

  Also, FIG. 5 attached herewith shows a preferable structure of the latter power supply board 510 among the signal board 500 and the power supply board 510 to be mounted using a plurality of support members 600, 600. As the insulating substrate 512 constituting the power supply substrate 510, for example, a flexible insulating paper or plate such as NOMEX paper (registered trademark), which is a product of DuPont, is used. It is cut out into a shape and formed (see FIG. 5A and FIG. 5B). Then, as shown in FIG. 5 (a), a plurality of flat head pins 520, 530, etc., each having a substantially “T” outer shape, are driven into (attached to) predetermined positions from the surface thereof. ), The front end of the flat head pin 520 and both side portions 530 of the center portion penetrates the substrate 512 and protrudes at the back surface of the insulating substrate 512, so The spacer is used to secure a predetermined gap. The protruding heights of these flat head pins 520 are such that the height “hc” of the flat head pin at the center is slightly larger (hc> hs) than the height “hs” of the flat head pins at both sides. Is set.

On the insulating substrate 512 of the power supply substrate 510 formed as described above, on the back surface shown in FIG. 5B, elements constituting a power supply circuit for supplying various voltage power supplies (FIG. 5C ) Is formed by a broken line. And the power supply substrate 510 is
As shown in FIG. 2, the insulating substrate 512 is arranged in a narrow space left on the back side of the panel module 100 by using support members 600, 600. At that time, as shown in FIG. 5 (c), the insulating substrate 512 (especially, the element indicated by the broken line provided on the back surface thereof) is particularly affected by the function of the flat head pin 520 at the center portion of the panel module 100. Even if the insulating substrate 512 is bent by being pressed by a force from the outside at a position spaced apart from the back surface of the frame 110 by a desired distance, the flat head pins 530 on both sides of the frame 110 may be bent. In this case, it is ensured at a position separated from the back surface of the frame 110 by a predetermined distance.

  That is, according to the insulating substrate 512 including the flat head pins 520 and 530 described above, a necessary predetermined distance is reliably ensured between the elements constituting the power supply circuit and the frame 110 (element and frame). Can be prevented). Therefore, such a structure will be particularly suitably applied as an insulating substrate of the power supply substrate 510 that may cause a failure due to contact with the frame of the panel module.

  In addition, a modified example of the supporting members 600 provided on the back side of the panel module 200, particularly a structure suitable for grounding the frame 110 of the panel module described above, will be described with reference to the attached FIG. Add In addition, this is because it is preferable to secure the ground contact positions of the frame 110 of the panel module at a plurality of locations in order to maintain a good performance as the area of the panel module increases due to the enlargement of the image display device. Depending on the point of view.

  That is, as shown in FIG. 6 (a), one or a plurality of recesses 630 as shown in FIG. 6 (b) are formed at desired locations in the middle of the support member 600, and the support member 600 is formed. After the member 600 is attached to the back side of the frame 110 of the panel module, a screw 631 or the like is attached from a conductive member such as a metal, thereby bringing the support member and the frame into an electrically conductive state. The grounding state in the whole module is ensured satisfactorily.

  Finally, in FIG. 7 attached, circuit boards such as the signal board 500 and the power board 510 are utilized by using a plurality of support members 600 attached on the back side of the panel module as described above. A state (state) in which the back cover (back cover) 300 is attached from above (the back surface of the panel module) is shown. The signal board 500 and the power board 510 are attached to the frame 110 on the back side of the panel module, as is clear from the structure described above. As indicated by the arrows, the air that has flowed into the interior thereof through the opening 301 formed in the lower portion of the back cover (back cover) 300 passes through the gaps and the vicinity of the elements, thereby causing the signal board 500 and The power supply substrate 510 is moved upward while cooling. Thereafter, the liquid flows out from the openings 302, 302... Formed in the upper part of the back cover (back cover) 300.

  That is, according to the above structure, the circuit board such as the signal board 500 and the power supply board 510 is left on the back side of the panel module using a plurality of support members attached to the back side of the panel module. It is possible to arrange in a narrow space, and an excellent effect is obtained that the cooling of the circuit board can be reliably ensured. Also, for this reason, the plurality of support members 600, 600... Are preferably attached in the direction in which the air for cooling the signal board 500 and the power supply board 510 flows, that is, in the vertical direction.

1 is a developed perspective view showing an entire configuration of an image display device according to an embodiment of the present invention. The perspective view at the time of taking out only a panel module from the said image display apparatus and seeing from the back side is shown. It is a figure which shows the other structural example of the structure for ensuring the mechanical strength in the said panel module. It is a figure which shows the structural example suitable for especially a large sized image display apparatus of the structure for ensuring the mechanical strength in the said panel module. In the said image display apparatus, it is a figure which shows the specific structure of the power supply board attached to the back surface of a panel module. It is a figure for showing the modification of the supporting member attached to the back surface of the said panel module. It is a figure which shows the state which attaches a back cover from the top after attaching a circuit board to the said panel module.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Liquid crystal display (panel module), 110 ... Frame, 111 ... Gutter, 112 ... Reinforcement part, 120 ... Leg part (stand), 200 ... Outer frame, 300 ... Back cover (back cover), 400 ... Metal pipe , 420 ... "L" -shaped member

Claims (2)

An image display device in which a panel module in which a display element is mounted on a thin metal frame having a substantially rectangular outer shape is mounted in a housing ,
Folding the flange portion formed along the outer periphery of the thin plate-shaped metal frame constituting the panel module by drawing to form a reinforcing portion having a substantially U-shaped cross section ,
And a plurality of support members for supporting the panel module, wherein the support members are fitted and fixed to the reinforcing portion having a substantially U-shaped cross section . 2. The image display device according to claim 1 , wherein a leg portion of the image display device is formed below the support member fixed to the reinforcement portion formed on the flange portion of the frame. Display device.

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