JP2007017513A - Thin display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device in which such a failure is prevented that the periphery of an opening of a front panel rubs against the surface of an optical filter to damage the surface of the optical filter and generate powder and the failure can be made invisible even when generated. <P>SOLUTION: A front face part holding member 8, which is provided with a front face pressing part 8b bent to have an almost U-like shape for pressing the periphery of the front face part of the optical filter 3, a supporting part 8c for receiving the inner wall surface of the front panel 2 and an upper surface pressing part 8d for pressing the end face of the optical filter 3, is arranged on the inner wall surface of the front panel 2. A bent part to be bent toward the periphery of the opening of the front panel 2 is formed so that the tip of the bent part is positioned on the front face side while leaving a fixed distance from the position of the front face pressing part 8b. As a result, a predetermined space can be kept between the tip of the bent part and the optical filter 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a thin display device using a plasma display panel (PDP) or a liquid crystal display panel, and more particularly to a structure of a front panel constituting a casing.

  A thin display device using a PDP (plasma display panel) or liquid crystal, for example, as shown in the cross-sectional view of the main part of FIG. 6A, a front panel 30 formed in a frame shape and having an opening on the front surface, A rectangular rear panel attached to the front panel 30 constitutes an outer casing, and a PDP displaying a video screen therein, a video signal processing board for sending a video signal to the PDP, and the like And an optical filter 31 for color correction, PDP protection, and the like is attached to the opening of the front panel 30 on the front side of the PDP.

  The optical filter 31 is made of a transparent acrylic resin, a resin material such as polycarbonate, or ordinary glass, plywood glass, or heat tempered glass. The optical filter 31 transmits an image from the PDP to the front side and has an impact force. It is designed to protect PDPs that are weak against external forces. The front panel 30 is usually formed in a frame shape from a resin material such as polyethylene or polystyrene, and the periphery of the opening is bent inward so that the front end is in contact with the front surface of the optical filter 3. In addition, a front holding member 33 made of an extruded aluminum material and having a substantially L-shaped cross section is screwed onto the inner wall surface so that the front holding member 33 holds the front and end faces of the optical filter 31. It has become. A rear surface holding member 32 is configured to hold the rear surface edge of the optical filter 31.

  If the above thin display device is vibrated for a long time, for example, during transportation, the front end portion of the front panel 30 rubs against the surface of the optical filter 31, and the surface of the optical filter 31 may be finely scratched. In such a case, there may be a problem that the powder due to scratches adheres to the periphery of the opening and affects the appearance, and as shown in FIG. 6B, the optical filter 31 and the front panel 30 A predetermined gap T is provided between the front end portions and between the optical filter 31 and the front surface holding member 33 so that the front end portion of the front panel 30 remains at the optical filter 31 even if some vibration is applied to the thin display device. In some cases, measures were taken to avoid rubbing against the surface of the material.

  However, when assembling the thin display device, if the front panel 30 is tilted and attached, or the front panel 30 and the optical filter 31 are bent, the above-described state is obtained as shown in FIG. Such a rubbing phenomenon may occur, and a new countermeasure has been demanded.

  In view of the above problems, the present invention can accurately prevent defects such as scratches and powder generation on the optical filter surface due to friction between the periphery of the opening of the front panel and the surface of the optical filter. An object of the present invention is to provide a thin display device capable of maintaining its appearance so that it cannot be visually recognized even if it occurs.

  In order to solve the above-described problems, the present invention provides a thin display device in which an optical filter is attached to an opening of a front panel, and a rear holding member that presses a peripheral edge of the rear surface of the optical filter on a rear portion of the inner wall surface of the front panel. On the other hand, a front holding member provided with a front pressing portion for pressing the front edge of the optical filter and a supporting portion for supporting the vicinity of the opening of the front panel is provided at the front of the inner wall surface of the front panel, A predetermined gap is maintained between the front end of the bent portion of the front panel and the optical filter. In the thin display device in which an optical filter is attached to the opening of the front panel, a notch is formed on the inner peripheral side of the bent portion of the front panel, while the outer peripheral side of the bent portion is contacted with the surface of the optical filter. It is configured to contact. In addition, a rib is provided on the inner wall surface of the front panel so as to project the end face of the optical filter and the peripheral edge of the front surface.

  According to the present invention, on the front surface of the inner wall surface of the front panel, a front pressing portion that is bent in a substantially U shape that presses the periphery of the front surface portion of the optical filter, and a support portion that supports the inner wall surface in the vicinity of the opening of the front panel, While providing a front holding member having an upper surface pressing part for pressing the end face of the optical filter, the front end of the bent part bent to the periphery of the opening of the front panel has a certain distance from the position of the front pressing part. Even if a long-time vibration or impact force acts on the thin display device by forming it so as to be positioned on the front surface side and maintaining a predetermined gap between the tip of the bent portion and the optical filter, The front end of the bent portion is prevented from rubbing against the surface of the optical filter, so that fine scratches on the surface of the optical filter or adhesion of powder due to scratches can be prevented in advance. That. In addition, a notch is formed on the inner peripheral side of the bent portion that is bent to the periphery of the opening of the front panel, while the outer peripheral side of the bent portion is brought into contact with the surface of the optical filter, while the outer peripheral side of the bent portion is Even if the surface of the optical filter is rubbed, finely scratched or powdered, it is made a thin display device that does not cause the user to feel uncomfortable by making it not visible due to the notch. Can be done. Further, by providing a rib for pressing the end face of the optical filter and the front peripheral edge on the inner wall surface of the front panel, the rubbing phenomenon is prevented with a simple configuration.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings.

  FIG. 1 is an external perspective view of a thin and thin display device, and FIG. 2 is a cross-sectional view thereof. FIG. 3 is a cross-sectional view of the main part showing the first embodiment, FIG. 4 is a cross-sectional view of the main part showing the second embodiment, and FIG. 5 is a cross-sectional view showing the third embodiment.

  As shown in the external perspective view of FIG. 1, a thin display device 1 according to the present invention includes a front panel 2 made of a resin material formed in a frame shape, and a resin material or An outer casing is constituted by the rear panel 4 made of sheet metal, and an optical filter 3 made of a plate-like transparent member is mounted on the open front surface of the front panel 2. In the housing, as shown in the sectional view of FIG. 2, a video signal processing board 6 on which electronic components are mounted, and the optical filter 3 by plasma discharge based on a signal sent from the video signal processing board 6 A plasma display panel 5 and the like for projecting an image are incorporated. In addition, a handle that is used as a handle during transportation is mounted on the upper part of both side surfaces of the rear panel 4.

  Although not shown, the plasma display panel 5 is configured by arranging a front glass and a rear glass so as to face each other, and a rare gas such as xenon is sealed between these glasses in a reduced pressure state. Yes. Discharge electrodes, dielectric films, protective films, etc. are formed on the front glass, and barrier ribs, phosphors, address electrodes, etc. are formed on the back glass, thereby forming a large number of discharge cells. A full color screen display can be performed by selectively discharging and emitting an arbitrary phosphor. The front glass is scratched and distorted when laminating electrodes, dielectric films, etc., and the strength is significantly reduced by these, and it is easily damaged when subjected to some external force or impact force. The optical filter 3 is also provided on the front surface of the optical filter 3 which also serves as light emission color correction.

  The optical filter 3 is formed of a transparent acrylic resin, a resin material such as polycarbonate, or ordinary glass, plywood glass, heat tempered glass, or the like, and on its back surface, electromagnetic waves radiated from the plasma display panel 5 and An electromagnetic wave shielding film that shields near infrared rays and prevents other electronic devices from being affected by noise such as electromagnetic waves, a color correction film that corrects the emission color from the plasma display panel 5, and an external fluorescent lamp. An antireflection film or the like for preventing external light from being diffusely reflected in the gap between the optical filter 3 and the plasma display panel 5 is appropriately attached.

  A plurality of ribs protrude from the rear inner wall surface of the front panel 2, and a rear holding member 7 having a substantially L-shaped cross section is screwed to the plurality of ribs. The rear holding member 7 is made of an extruded aluminum material having excellent rigidity, and although not shown, a top frame positioned along the upper side of the front panel 2, a bottom frame positioned along the lower side, It is composed of a pair of side frames and a plurality of corner joints made of sheet metal that connect these end portions, and maintains the rigidity of the casing made up of the front panel 2 and the rear panel 4, and the rear part The bent front end portion of the holding member 7 is configured to press the periphery of the rear surface portion of the optical filter 3.

  As shown in the cross-sectional view of the main part of FIG. 3, a pair of upper and lower bosses 2a are formed on the inner wall surface of the front panel 2, and a plurality of bosses 2 are provided in a row along the longitudinal direction. It has been. A front holding member 8 is screwed to the boss 2a, and the front holding member 8 includes a flat plate-like flat portion 8a having a pair of upper and lower screw insertion holes corresponding to the boss 2a. A front pressing part 8a bent into a substantially U-shape continuous with the flat part 8a, a support part 8c extending from the front end of the front pressing part 8a, and an upper surface bent so as to be orthogonal to the flat part 8a It consists of a pressing part 8b. The front holding member 8 is formed of an aluminum extruded material as in the case of the rear holding member 7 or is formed of a sheet metal having a spring property, and the front pressing portion 8a bent in a substantially U-shape is provided. Opposite the rear holding member 7 for pressing the peripheral edge of the rear face of the optical filter 3, the front edge of the optical filter 3 is pressed, and the support portion 8 c supports the front inner wall of the front panel 2. It has become. Further, the upper surface pressing portion 8b presses the end surface of the optical filter 3 and holds the predetermined position.

  The front end of the bent portion of the front panel 2 that is bent to the periphery of the opening is from the position of the front pressing portion 8a that is in contact with the optical filter 3 of the front holding member 8, as shown in the cross-sectional view of the main part of FIG. It is formed so as to be positioned at a certain distance, whereby a predetermined gap L is always maintained across the entire periphery between the tip of the bent portion and the front surface of the optical filter 3. It has become so.

  The front pressing part 8a bent in a substantially U-shape of the front pressing part 8a presses the optical filter 3 rearward, and a predetermined gap is formed between the front end of the bending part of the front panel 2 and the optical filter 3. The gap L is always maintained, and the support portion 8c supports the inner wall surface in the vicinity of the opening of the front panel 2, so that a long-time vibration or impact force acts on the thin display device 1 for some reason. Even so, the front end of the bent portion of the front panel 2 rubs against the surface of the optical filter 3, and the surface of the optical filter 3 is finely scratched, or the powder due to the scratch adheres to the image surface. Therefore, it is possible to prevent such a problem that the performance is lowered and the user is uncomfortable.

  Next, a second embodiment will be described. In the second embodiment, as shown in the cross-sectional view and the enlarged view of the main part of FIG. 4, in addition to the configuration of the first embodiment, the bent portion 9a bent to the periphery of the opening of the front panel 9 has a width L2. A notch having a depth L3 is formed over the periphery of the opening, while the outer peripheral side of the bent portion 9a abuts on the surface of the optical filter 3 to hold it. By forming a notch on the periphery of the bent portion 9a, a long-time vibration or impact force acts on the thin display device 1 for some reason, and the outer peripheral side of the bent portion of the front panel 9 is temporarily Even if the surface of the optical filter 3 is rubbed and a fine scratch or powder is generated on the surface of the optical filter 3, it is not visually recognized by the notch, and the user is uncomfortable. In this way, it is possible to maintain the appearance and design characteristics without causing problems.

  Next, a third embodiment will be described. In the third embodiment, as shown in FIG. 5, a plurality of ribs 10 b are projected from the inner wall surface of the front panel 10, and a notch upper side member 10 c provided on the rib 10 b holds the end face of the optical filter 3. The side portion 10d of the notch is configured to hold down the front peripheral edge of the optical filter 3 so that the rubbing phenomenon between the bent portion 10a of the front panel 10 and the optical filter 3 can be prevented with a simple configuration. It has become.

It is an external appearance perspective view which shows a thin display apparatus. It is sectional drawing of a thin display apparatus. It is principal part sectional drawing of the thin display apparatus by a 1st Example. It is principal part sectional drawing of the thin display apparatus by a 2nd Example. It is principal part sectional drawing of the thin display apparatus by a 3rd Example. It is sectional drawing of the conventional thin display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thin display apparatus 2a Boss 2 Front panel 3 Optical filter 4 Rear panel 5 Plasma display panel 6 Video signal processing board 7 Rear part holding member 8 Front part holding member 8a Flat part 8b Front surface pressing part 8c Support part 8d Upper surface pressing part 9 Front panel 9a Bent part 10 front panel 10a bent part 10b rib 10c upper side part 10d side part

Claims (3)

In a thin display device in which an optical filter is attached to the opening of the front panel,
A rear holding member that presses the peripheral edge of the rear surface of the optical filter is provided at the rear surface of the inner wall surface of the front panel, and a front pressing portion that presses the peripheral edge of the front surface of the optical filter is provided at the front surface of the inner wall surface of the front panel. A front holding member provided with a support portion that supports the vicinity of the opening is provided, and a predetermined gap is held between the front end of the bent portion of the front panel and the optical filter. Thin display device. In a thin display device in which an optical filter is attached to the opening of the front panel,
A thin display device, wherein a notch is formed on the inner peripheral side of the bent portion of the front panel, while the outer peripheral side of the bent portion is brought into contact with the surface of the optical filter.   The thin display device according to claim 2, wherein a rib that presses against an end face of the optical filter and a peripheral edge of the front surface is provided on an inner wall surface of the front panel.

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