JP2004246370A - Plasma display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma display device that has a lightweight and thin structure for which electromagnetic noise countermeasures are taken and facilitates repair processing. <P>SOLUTION: A film-like front filter 7 has such a structure that an antireflective film (AR film) 73 is stuck on the front of a transparent conductive film 71 across an adhesive layer 72. The film-like front filter 7 is stuck on the front of a PDP 2 with an adhesive layer 10 applied to the reverse surface side of the transparent conductive film 71. The adhesive layer 10 is not present on the light non-emission area 2a of the PDP 2. In the light non-emission area 2a, the film-like front filter 7 can, therefore, be peeled. This peelable area is a repair area. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a plasma display device using a plasma display panel (PDP).

  A plasma display panel (PDP) is, for example, a backside glass substrate and a frontside glass substrate on each of which a large number of linear electrodes are arranged at predetermined intervals so that the electrodes are orthogonal to each other. It has a structure filled with gas. A discharge cell will be formed at each position where the electrodes on the back side and the front side are orthogonal to each other, and when ultraviolet rays generated by discharge in this discharge cell hit the phosphor provided on the glass substrate on the back side or front side Visible light is emitted from the phosphor.

  FIG. 7 is a sectional view showing an example of the internal structure of the plasma display device. A PDP 52 is mounted on one surface of the support substrate 51, and a circuit mounting substrate 54 on which a power supply circuit 53 and various circuits are mounted is mounted on the other surface. The support substrate 51 is fixed to a back panel 55, and the back panel 55 is attached to a housing 56.

  On the light emission side of the PDP 52, a front filter glass plate 57 is arranged with a space for air cooling. The air passing through the space for air cooling takes heat released from the PDP 52 and is discharged outside the machine by the fan 60 provided at the upper end of the housing 56. The front filter glass plate 57 not only adjusts contrast and color temperature, but also reduces electromagnetic radiation noise emitted from the PDP 52 by a transparent conductive film (ITO or the like) 57a provided on the back surface side. The four sides of the front filter glass plate 57 are fixed to the housing 56 by metal support members 58. The front filter glass plate 57 is heavy, and requires a large number of screws in order to increase the degree of pressure contact to reduce the contact electric resistance between the transparent conductive film 57a and the metal support member 58.

In addition, the linear electrodes of the PDP 52 are formed extremely thin, and it is difficult to eliminate disconnection. Therefore, when a disconnection occurs in the linear electrode, a repair process is performed as shown in FIG. In the example of FIG. 8, one of the linear electrodes serving as the column electrodes is disconnected. One end of the linear electrode is connected to a drive circuit (not shown), and one end of the repair wire 61 is connected to a portion connected to the drive circuit by soldering or the like. Then, the repair line 61 is crawled in the repair region (on the glass surface of the non-light emitting portion of the PDP), and the other end of the repair line 61 is connected to the other end of the linear electrode (the portion not connected to the drive circuit). I do. As a result, a voltage is applied to the other end of the linear electrode from the drive circuit via the repair line 61, and the light emitting state can be recovered.
JP-A-11-204046 JP-A-11-339667

  The plasma display device is considered to be advantageous for use as a wall-mounted television, and it is important to reduce the weight and thickness. However, in the plasma display device described above, since a space for air cooling is provided, It is considered that this is not enough in terms of reduction in thickness, and is also not sufficient in terms of weight reduction because of the provision of the heavy front filter glass plate 57. Further, a large number of screws are required to fix the heavy front filter glass plate 57 to the housing, and there is a disadvantage that the number of screwing operations in the manufacturing process increases.

  In view of the above circumstances, it is a first object of the present invention to provide a lightweight and thin plasma display device. A second object is to provide a structure in which repair can be easily performed in the lightweight and thin structure.

  In the plasma display device of the present invention, in a plasma display device in which a transparent film is adhered to a display surface side of a plasma display panel via an adhesive layer, an edge of the plasma display panel can be peeled off without providing an adhesive layer. It is characterized by.

  With the above configuration, the film-like front filter can be peeled off on the edge surface of the plasma display panel while the film-like front filter is directly attached to the plasma display panel, and the peelable area is repaired. Repair lines can be easily arranged as regions.

  The edge may be a non-light emitting portion of a plasma display. By doing so, even if the repair line is arranged in the peelable region, that is, the repair region, the display of the plasma display is not affected.

  Preferably, the transparent film has at least a transparent conductive film and an optical property adjusting film. Thereby, the minimum required front filter for the plasma display can be constituted by a film, and the repair region can be easily separated. In addition, an effect can be obtained in reducing the weight and thickness.

  As described above, the plasma display device of the present invention has a structure in which the film-shaped front filter is directly attached to the front side of the plasma display panel, so that a lightweight and thin plasma display device can be realized. Since the edge of the film-shaped front filter can be peeled off from the plasma display panel, repair processing can be easily performed in the lightweight and thin structure. In addition, since the busbar region is formed at the edge of the film-shaped front filter, electrical connection to the housing for reducing electromagnetic radiation noise can be easily performed in the lightweight and thin structure. Further, if the bus bar region is formed outside the light emitting portion of the plasma display panel and inside the edge of the plasma display panel, the electrical connection to the housing becomes easier.

(Embodiment 1)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of the plasma display device (the inside of the housing is shown in perspective), FIG. 2 is a cross-sectional view of the plasma display device, and FIG. FIG. 4 is an explanatory diagram showing a relationship between a front filter and a bus bar region, and FIG. 4 is a cross-sectional view showing details of a film-shaped front filter.

  As shown in FIGS. 1 and 2, a plasma display panel (hereinafter abbreviated as PDP) 2 is accommodated in a rectangular housing 6. A film-shaped front filter 7 is adhered to the front surface of the PDP 2. The PDP 2 is fixed to one surface side of the support substrate 1 arranged on the back surface side. A circuit board 4 on which a power supply circuit 3 and various circuits are mounted is attached to the other surface of the support board 1. The support substrate 1 is fixed to a back panel 5, and the back panel 5 is attached to a housing 6. A fan 9 is attached to an upper part in the housing 6. An opening 6 a corresponding to the light emitting portion of the PDP 2 is formed in the front frame 6 b of the housing 6.

  Although the PDP 2 is not shown in detail, for example, a back-side glass substrate and a front-side glass substrate on which a number of linear electrodes are arranged at predetermined intervals are attached so that the electrodes are orthogonal to each other. It has a structure in which a mixed gas of Ne (neon) and Xe (xenon) is filled in between. A discharge cell will be formed at each position where the electrodes on the back side and the front side are orthogonal to each other, and when ultraviolet rays generated by discharge in this discharge cell hit the phosphor provided on the glass substrate on the back side or front side Visible light is emitted from the phosphor. In the case of a full-color plasma display device, a large number of phosphors emitting R (red), G (green), and B (blue) are arranged as a set. The linear electrodes do not intersect at the outer peripheral portion of the PDP 2, and the outer peripheral portion forms the non-light emitting region 2a.

  The film-shaped front filter 7 has a rectangular shape somewhat larger than the PDP 2 as shown in FIG. The outer peripheral portion of the film-shaped front filter 7 forms a bus bar region 7a. The bus bar region 7a is located outside the outer periphery of the PDP 2 and electrically contacts a conductor (not shown) provided on the back surface of the front frame 6b of the housing 6. The electromagnetic wave radiated from the PDP 2 is converted into a current in the film-shaped front filter 7, and the current flows through the conductor of the housing 6 via the bus bar region 7 a, thereby reducing electromagnetic wave radiation noise. .

  As shown in FIG. 4, the film-shaped front filter 7 has a structure in which an antireflection film (AR film) 73 as an optical property adjusting film is attached to the front surface of a transparent conductive film 71 via an adhesive layer 72. The antireflection film 73 and the adhesive layer 72 are not present at the outer peripheral edge of the transparent conductive film 71, and the outer peripheral edge of the transparent conductive film 71 becomes a conductive film exposed portion to form the above-described bus bar region 7a. The transparent conductive film 71 is formed by depositing ITO (an alloy oxide film of indium and tin) on a base sheet made of, for example, PET (polyethylene terephthalate). Further, as the adhesive layer 72, for example, an acrylic adhesive is used. The film-shaped front filter 7 is attached to the front surface of the PDP 2 by the adhesive layer 10 applied to the back surface of the transparent conductive film 71. The adhesive layer 10 does not exist on the non-light-emitting region 2a in the PDP 2. Therefore, the film-shaped front filter 7 can be peeled off on the non-light-emitting region 2a. This peelable area is referred to as a repair area.

  As described above, since the film-shaped front filter 7 is directly attached to the front surface of the PDP 2, there is no space for air cooling between the PDP 2 and the film-shaped front filter 7, and the plasma display device is used. It can be made thin. The heat generated by the PDP 2 is released to the outside through the film-shaped front filter 7 because there is no space for cooling. In addition, since the film-shaped front filter 7 is provided instead of the heavy front filter glass plate, the weight can be reduced, and a large number of screws are not required unlike the case where the heavy front filter glass plate is fixed to the housing. Further, the adhesive layer 10 is not interposed between the back surface of the transparent conductive film 71 and the non-light-emitting region 2a at the edge of the PDP 2, and is peelable. This allows the film-shaped front filter 7 to be peelable on the surface of the non-light-emitting portion 2a of the PDP 2 while directly attaching the film-shaped front filter 7 to the PDP 2, and using the peelable area as a repair area as a repair line. (Not shown) can be arranged.

  A busbar region 7a formed on the outer peripheral portion of the film-shaped front filter 7 is in electrical contact with a conductor (not shown) on the back surface of the front frame 6b in the housing 6. Thus, in a lightweight and thin structure using the film-shaped front filter 7, electrical connection to the housing 6 for reducing electromagnetic wave radiation noise can be performed.

(Embodiment 2)
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a sectional view of the plasma display device, and FIG. 6 is a sectional view showing details of the film-shaped front filter.

  As shown in FIGS. 5 and 6, the film-shaped front filter 8 has a rectangular shape having the same size as the PDP 2. The film-shaped front filter 8 has a structure in which an antireflection film (AR film) 83 is attached to the front surface of a transparent conductive film 81 via an adhesive layer 82. The antireflection film 83 and the adhesive layer 82 do not exist on the outer peripheral edge of the transparent conductive film 81, and the outer peripheral edge of the transparent conductive film 81 becomes a conductive film exposed portion to form the bus bar region 8a. The bus bar region 8a is formed outside the light emitting portion of the PDP 2 and inside the outer edge of the PDP 2. The film-shaped front filter 8 is attached to the front surface of the PDP 2 by the adhesive layer 10 applied on the back surface side of the transparent conductive film 81. The adhesive layer 10 is not applied on the non-light emitting area 2a of the PDP 2. Therefore, the film-shaped front filter 8 can be peeled off on the non-light-emitting region 2a. This peelable area is referred to as a repair area. On the back surface of the front frame 6b of the housing 6, a copper foil 12 as a conductor is provided corresponding to the bus bar region 8a.

  With the plasma display device of this embodiment, similarly to the first embodiment, it is possible to realize a thin and lightweight structure, and it is possible to easily perform a repair process with this thin and lightweight structure. In this embodiment, the film-shaped front filter 8 is formed in the same size as the PDP 2, and the bus bar region 8 a is outside the light emitting portion of the PDP 2 and inside the edge of the PDP 2 (PDP non-light emitting). Since the PDP 2 having the film-shaped front filter 8 attached thereto is pressed against the back surface of the front frame 6b of the housing 6, the busbar region 8a is attached to the front frame of the housing 6. Since the bus bar region 8a is pressed against the rear surface of the housing 6b, a pressing member for pressing the bus bar region 8a against the housing 6 may be unnecessary. Therefore, in such a lightweight and thin structure, electrical connection to the housing 6 for reducing electromagnetic wave radiation noise can be more easily performed.

FIG. 2 is a perspective view of the plasma display device according to the first embodiment of the present invention (the inside of the housing is shown in perspective). FIG. 2 is a cross-sectional view of the plasma display device of FIG. FIG. 2 is an explanatory diagram showing a relationship between a light emitting / non-light emitting area of the plasma display panel of FIG. 1 and a bus bar area of a film-shaped front filter. It is sectional drawing which showed the detail of the film-shaped front filter of FIG. FIG. 6 is a sectional view of a plasma display device according to a second embodiment of the present invention. It is sectional drawing which showed the detail of the film-shaped front filter of FIG. It is a sectional view of the conventional plasma display device. FIG. 4 is an explanatory diagram illustrating an outline of a repair process.

Explanation of reference numerals

2 Plasma display panel (PDP)
2a Non-light-emitting area 6 Case 7 Film-shaped front filter 7a Busbar area 71 Transparent conductive film 72 Adhesive layer (first adhesive layer)
73 Antireflection film 8 Film-shaped front filter 8a Busbar area 81 Transparent conductive film 82 Adhesive layer (first adhesive layer)
83 antireflection film 10 adhesive layer (second adhesive layer)

Claims (3)

In a plasma display device in which a transparent film is attached to a display surface side of a plasma display panel via an adhesive layer, an edge portion of the plasma display panel is peelable without providing an adhesive layer, . The plasma display device according to claim 1, wherein the edge is a non-light emitting portion of a plasma display. The plasma display device according to claim 1, wherein the transparent film includes at least a transparent conductive film and an optical property adjusting film.

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