JP2010145689A - Plasma display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma display device that includes a chassis member and a PDP bonded to each other through a double-sided adhesive sheet and easily removes the PDP from the chassis member. <P>SOLUTION: The plasma display device 204 includes a plasma display panel 201 having a pair of front-side substrate 111 and rear-side substrate 121 arranged facing each other across a barrier rib so as to form a discharge space between the substrates, and a chassis member 203 stuck to the rear-side substrate 121 of the plasma display panel 201 via the double-sided adhesive sheet 202. The plasma display device 204 also includes a heating element 126 disposed on a surface of the rear-side substrate 121 opposite to the surface having the barrier rib 124. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

  As a display device for displaying a high-definition television image on a large screen, a plasma display device using a PDP as a display device has been put into practical use.

  Here, the PDP basically includes a front substrate and a rear substrate. And this plasma display apparatus is comprised by bonding together this PDP and metal chassis members with the heat conductive sheet which is a double-sided adhesive sheet.

  A substrate on the front side of the PDP is a glass substrate, a display electrode made of a striped transparent electrode and a bus electrode formed on one main surface thereof, and a dielectric that acts as a capacitor covering the display electrode It is composed of a glass layer and a protective layer made of MgO formed on the dielectric layer.

  On the other hand, the substrate on the back side is a glass substrate, a stripe-shaped address electrode formed on one main surface, a dielectric layer covering the address electrode, a partition formed thereon, and between each partition And phosphor layers that emit light in red, green, and blue, respectively.

  The front-side and back-side substrates are hermetically sealed with their electrode-forming surfaces facing each other, and a discharge gas such as Ne—Xe is sealed in the discharge space formed by the barrier ribs.

The PDP generates a discharge in the discharge space by selectively applying a video signal voltage to the display electrodes, and the ultraviolet rays generated thereby excite the phosphor layers of each color, thereby causing red, green, blue Is emitted to realize a color image display (see Patent Document 1).
JP 2003-131580 A

  By the way, in the plasma display device, in order to recycle defective products generated in the manufacturing process or products for which the purpose of use has been completed, it is necessary to separate the PDP mainly made of a glass material and the metal chassis member.

  The present invention has been made in view of the above situation, and provides a plasma display device including a chassis member and a PDP joined by a double-sided adhesive sheet, and in which the PDP and the chassis member can be easily separated. The purpose is to do.

  In order to achieve the above object, a plasma display device of the present invention includes a plasma display panel having a pair of front-side substrates and a back-side substrate disposed so as to face each other with a partition wall so that a discharge space is formed between the substrates. And a chassis member affixed to the substrate on the back side of the plasma display panel via a double-sided adhesive sheet, in the plasma display device, the surface of the substrate on the back side is opposite to the surface on which the partition walls are formed Is provided with a heating element.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the plasma display apparatus which can isolate | separate PDP and a chassis member easily in the plasma display apparatus provided with the chassis member and PDP joined by the double-sided adhesive sheet.

  Hereinafter, a plasma display device according to an embodiment of the present invention will be described with reference to the drawings. However, the embodiment of the present invention is not limited thereto.

  FIG. 1 is a cross-sectional perspective view showing a schematic configuration of a PDP in a plasma display device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a schematic configuration of the plasma display device according to the embodiment of the present invention.

  The PDP 201 includes a front plate 101 and a back plate 102.

  The front plate 101 is provided with a plurality of pairs of display electrodes 112 arranged on the substrate 111 on the front side, and a dielectric layer 113 is provided so as to cover the group of display electrodes 112, and further this dielectric layer 113 is covered. A protective layer 114 made of MgO is provided. Here, the display electrode 112 is composed of, for example, a scan electrode and a sustain electrode including a transparent electrode and a bus electrode electrically connected to the transparent electrode.

  In addition, the back plate 102 has an address electrode 122 formed of, for example, Ag and the address electrode 122 in a direction intersecting the display electrode 112 on the back side substrate 121 arranged to face the front side substrate 111. A dielectric layer 123 provided to cover, a partition wall 124 provided in stripes in parallel with the address electrode 122 in a portion between the address electrodes 122 on the dielectric layer 123, a side surface of the partition wall 124, and a dielectric layer A line such as a stripe shape formed of a conductive material provided on a surface opposite to the surface on which the partition wall 124 is formed of the phosphor layer 125 provided on the substrate 123 and the substrate 121 on the back plate side. And a heating element 126 having a shape. Here, the phosphor layer 125 is usually arranged in order of three colors of red, green, and blue for color display.

  The front plate 101 and the back plate 102 having the above-described configuration are arranged opposite to each other with the discharge space interposed therebetween so that the display electrode 112 and the address electrode 122 intersect, and the periphery is sealed with a sealing member. The PDP 201 is configured by enclosing a gas mixed with neon and xenon in the discharge space.

  Then, a periodic voltage is applied to the display electrode 112 and the address electrode 122 to generate a discharge in the discharge space. The phosphor layer 125 is irradiated with ultraviolet rays from the discharge to convert it into visible light, thereby displaying an image. It is carried out.

  Here, since heat is generated in the PDP 201 due to discharge during image display, the PDP 201 is passed through a heat conductive sheet, which is a double-sided adhesive sheet 202, for the purpose of efficiently dissipating the heat through the metal chassis member 203. The plasma display device 204 is configured by being bonded to the metal chassis member 203.

  In the configuration as described above, the plasma display device 204 needs to be separated from the PDP 201 and the chassis member 203 in order to recycle defective products generated in the manufacturing process and products that have been used for use. Conventionally, since the joining force (adhesive force) of the heat conductive sheet which is the double-sided adhesive sheet 202 is strong, there are cases in which it takes a lot of time for separation.

  Therefore, conventionally, for example, the plasma display device is heated using a heating furnace, and a rod-like or plate-like member is inserted into the joining interface between the PDP and the chassis member to separate the PDP from the chassis member. However, such a method has a problem of increasing the cost because a large heating furnace is required.

  However, according to the plasma display apparatus 204 according to the embodiment of the present invention as described above, the PDP 201 is a surface of the substrate 121 on the back plate side opposite to the surface where the partition walls 124 are formed, that is, both surfaces of the PDP 201. The adhesive sheet 202 is provided with a heating element 126 on the attachment surface, and when the plasma display device needs to be separated, the double-sided adhesive sheet 202 can be heated by energizing the heating element 126 to generate heat. Therefore, it is possible to easily separate the PDP 201 and the chassis member 203 from each other. According to such a separation method, when heating the double-sided adhesive sheet 202 for separation of the PDP 201 and the chassis member 203, a large heating furnace is not required, so that an increase in cost can be prevented.

  Here, as a method of providing the heating element 126 in the above description, for example, using a conductive material, some film formation is performed on the surface of the substrate 121 on the back plate side opposite to the surface on which the partition wall 124 is formed. Examples thereof include a method of forming by a method.

  Further, the material of the heating element 126 is a material having high resistance and high whiteness, and the width of the heating element 126 is made wider than at least the region between the partition wall 124 and the partition wall 124. By providing it so as to be positioned between them, it is preferable to have a structure that can efficiently generate heat and reflect visible light without leakage.

  With this configuration, in addition to the amount of visible light emitted from the phosphor layer 125 that passes through the front substrate 111, a part of the visible light passes through the dielectric layer 123 and the rear substrate 121 side. The visible light is reflected by the heating element 126 on the line and passes through the substrate 111 on the front side, and the combined visible light is used for image display. Increased efficiency can be expected.

  That is, the conventional PDP does not include the heating element 126 that is provided in the plasma display device 204 according to the embodiment of the present invention, and the visible light that has passed through the substrate on the back side is not effectively used, thereby reducing the light emission efficiency. Although it is a factor, the visible light passing through the substrate 121 on the back side is also leaked due to the presence of the heating element 126 provided in the plasma display device 204 according to the embodiment of the present invention as described above. It can be used efficiently and efficiently, leading to an improvement in luminous efficiency.

  In the above description, an alloy containing Ni—Cr is given as a material having both properties of high resistance and high whiteness. That is, it is desirable that Ni and Cr are included as a material for the heating element 126.

  As described above, the present invention is useful for providing a large-screen, high-definition plasma display device.

1 is a cross-sectional perspective view showing a schematic configuration of a PDP in a plasma display device according to an embodiment of the present invention. Sectional drawing which shows schematic structure of the plasma display apparatus by one embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Front plate 102 Back plate 111 Front side substrate 112 Display electrode 113 Dielectric layer 114 Protection layer 121 Back side substrate 122 Address electrode 123 Dielectric layer 124 Partition 125 Phosphor layer 126 Heating element 201 Plasma display panel (PDP)
202 Double-sided adhesive sheet 203 Chassis member 204 Plasma display device

Claims (2)

A plasma display panel having a pair of front side substrates and a rear side substrate disposed opposite to each other so that a discharge space is formed between the substrates;
A chassis member affixed to the substrate on the back side of the plasma display panel via a double-sided adhesive sheet;
In a plasma display device comprising:
A plasma display device comprising a heating element on a surface of a back side substrate opposite to a surface on which a partition wall is formed. The plasma display apparatus according to claim 1, wherein the heating element is provided so as to be positioned between the partition walls, and is formed of an alloy containing Ni and Cr.

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