JP2007079098A - Plasma display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably and firmly adhere the plasma display panel and the chassis and yet make it easy to separate them when required, and also effectively radiate the heat generated in the plasma display panel through the chassis and warranty improved image qualities and reliable operations. <P>SOLUTION: A plasma display device has a flat plasma display panel which is made of a pair of substrates transparent at least in the front and has discharge cells counterposed between the substrates, and a chassis to support the display panel. The plasma display panel and the chassis are reliably and stably adhered and secured with the extendable and peelable adhesive disposed between them, and the heat generated in the plasma display panel is radiated very effectively through the chassis. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a plasma display device as a flat display device.

  Conventionally, this type of plasma display device performs color display by generating ultraviolet rays by gas discharge and exciting the phosphor with the ultraviolet rays to emit light. And the display cell divided by the partition on the board | substrate is provided, and it has the structure by which the fluorescent substance layer is formed in this.

  This plasma display device is roughly classified into an AC type and a DC type in terms of driving, and there are two types of discharge types: a surface discharge type and a counter discharge type, but high definition, large screen, and simple manufacturing are possible. Therefore, at present, the mainstream of plasma display devices is a surface discharge type of a three-electrode structure, and the structure has a pair of display electrodes adjacent in parallel on one substrate, and on the other substrate. It has an address electrode arranged in a direction intersecting with the display electrode, a partition wall, and a phosphor layer. The phosphor layer can be made relatively thick and is suitable for color display using a phosphor.

  Such a plasma display device can display at a higher speed than a liquid crystal panel, has a wide viewing angle, is easy to enlarge, and is self-luminous so that the display quality is high. Recently, the flat panel display has attracted particular attention and is used for various purposes as a display device in a place where many people gather and a display device for enjoying a large screen image at home.

  First, the structure of the plasma display panel in the plasma display device will be described with reference to FIG. As shown in FIG. 4, on a transparent front substrate 701 such as a glass substrate, a plurality of stripe-shaped display electrodes 702 that are paired with a scan electrode and a sustain electrode are formed, and covers the electrode group. Thus, a dielectric layer 703 is formed, and a protective film 704 is formed on the dielectric layer 703.

  A plurality of rows of stripes covered with an overcoat layer 706 are formed on the back substrate 705 disposed opposite to the front substrate 701 so as to intersect the display electrodes 702 made of scan electrodes and sustain electrodes. A shaped address electrode 707 is formed. On the overcoat layer 706 between the address electrodes 707, a plurality of partition walls 708 are arranged in parallel to the address electrodes 707, and a phosphor layer 709 is provided on the side surface between the partition walls 708 and the surface of the overcoat layer 706. Yes.

  The substrate 701 and the substrate 705 are arranged opposite to each other with a minute discharge space 710 interposed therebetween so that the display electrode 702 made of the scan electrode and the sustain electrode and the address electrode 707 are almost orthogonal to each other, and the periphery is sealed. In the discharge space 710, one or a mixed gas of helium, neon, argon, and xenon is sealed as a discharge gas.

  In the discharge space 710, a plurality of discharge cells are provided at the intersections of the display electrodes 702 and the address electrodes 707 by dividing the discharge space 710 into a plurality of sections by partition walls 708. Each of the discharge cells has a red, green color. The phosphor layers 709 are sequentially arranged one by one so as to be blue.

FIG. 5 schematically shows an outline of the electrode arrangement of this plasma display panel. The scan electrode and the sustain electrode and the address electrode as shown in FIG. 5, a matrix configuration of M rows × N columns, scan electrodes _SCN 1 _~SCN of M rows in the row direction _M and the sustain electrodes _SUS 1 _{~SUS M} Are arranged, and N columns of address electrodes D _{1 to DN} are arranged in the column direction.

  In the plasma display panel having such an electrode configuration, by applying a write pulse between the address electrode and the scan electrode, an address discharge is performed between the address electrode and the scan electrode, and after selecting a discharge cell, A periodic sustain pulse that is alternately inverted is applied between the scan electrode and the sustain electrode, and a sustain discharge is performed between the scan electrode and the sustain electrode to perform a predetermined display.

  FIG. 6 shows an example of the entire configuration of a plasma display device incorporating the plasma display panel having the above-described structure. In FIG. 6, the housing that accommodates the plasma display panel 711 includes a front frame 712 and a metal back cover 713, and the opening of the front frame 712 also serves as protection for the optical filter and the plasma display panel 711. A front cover 714 made of glass or the like is disposed. Further, the front cover 714 is subjected to, for example, silver vapor deposition in order to suppress unnecessary radiation of electromagnetic waves. Further, the back cover 713 is provided with a plurality of vent holes 713a for releasing heat generated in the plasma display panel 711 and the like to the outside.

  The plasma display panel 711 is held by being bonded to the front surface of a chassis member 715 made of aluminum or the like via a heat conductive sheet 716, and on the rear surface side of the chassis member 715, the plasma display panel 711 is driven to display. A plurality of circuit blocks 717 are attached. The heat conductive sheet 716 transmits heat generated in the plasma display panel 711 to the chassis member 715 and makes the temperature distribution of the panel uniform. The circuit block 717 includes an electric circuit for performing display drive and control of the plasma display panel 711, and the edge of the four sides of the chassis member 715 is connected to the electrode lead-out portion drawn to the edge of the plasma display panel 711. They are electrically connected by a plurality of flexible wiring boards (not shown) extending beyond the section.

  On the rear surface of the chassis member 715, a boss portion 715a for attaching the circuit block 717 and fixing the back cover 713 is projected by integral molding by die casting or the like. The chassis member 715 may be configured by fixing a fixing pin to an aluminum flat plate.

As described above, for example, a method for manufacturing a plasma display device in which a heat conductive sheet 716 is sandwiched between a plasma display panel 711 and a chassis member 715 and these are brought into close contact with each other and adhered and held with a double-sided tape 718 or the like is described in, for example, the following patents: It is described in Document 1.
JP 2003-29662 A

  However, in such a method for manufacturing a plasma display device, in which the heat conductive sheet 716 is sandwiched between the plasma display panel 711 and the chassis member 715, and these are brought into close contact with each other and adhered and held with a double-sided tape 718 or the like. There has been a problem that the plasma display panel 711 and the chassis member 715 cannot always be held stably and reliably. Further, when the plasma display panel 711 and the chassis member 715 have to be separated due to dismantling, repair, adjustment, or other circumstances of the plasma display device, the separation is extremely difficult and requires a lot of man-hours. When separated, there was also a problem that the paste material remained on the plasma display panel 711 and the chassis member 715.

  The present invention has been made to solve such a problem. The plasma display panel and the chassis member are securely and stably bonded and held, and can be separated very easily when they are separated. An object of the present invention is to provide a plasma display device that can be used.

  According to the first aspect of the present invention, there is provided a flat plate-shaped plasma display panel in which a plurality of discharge cells are formed between a pair of substrates that are transparent at least on the front side, and a chassis that supports the plasma display panel. A plasma display device comprising: a member; and a stretch-peelable adhesive disposed between the plasma display panel and the chassis member.

  By providing such a configuration, a plasma display device is provided that can securely and stably adhere and hold the plasma display panel and the chassis member, and can be extremely easily separated even when they are separated. Is possible.

  The invention according to claim 2 of the present invention is characterized in that the adhesive material contains a heat dissipating filler, and by taking such a configuration, heat generated in the plasma display panel is transmitted via the chassis member. Therefore, it is possible to effectively dissipate heat and to ensure both improvement in image quality and stable operation.

  Further, in the invention according to claim 3 of the present invention, the adhesive material is obtained by applying a liquid material and cured, and by adopting such a configuration, the adhesive material is applied uniformly and with less man-hours. It becomes possible to do.

  According to a fourth aspect of the present invention, there is provided a flat plate-shaped plasma display panel in which a plurality of discharge cells are formed between a pair of substrates that are transparent at least on the front surface side, and the plasma display panel. A supporting chassis member; a heat conductive sheet disposed in contact with the plasma display panel; and a stretch-peelable adhesive disposed between the heat conductive sheet and the chassis member. This is a plasma display device.

  By adopting such a configuration, the plasma display panel and the chassis member can be securely and stably bonded and held, and at the same time, they can be separated very easily, and at the same time, they are generated in the plasma display panel. It is possible to effectively dissipate the heat to be transmitted through the chassis member, and to ensure both improvement in image quality and stable operation.

  The invention according to claim 5 of the present invention is characterized in that the heat conductive sheet is made of graphite or aluminum alloy, and by adopting such a configuration, the heat dissipation performance of the heat generated in the plasma display panel is further improved. It becomes possible to improve.

  According to the present invention, it is possible to provide a plasma display device that securely and stably adheres and holds the plasma display panel and the chassis member, and that is extremely easy to work when separating them.

(First embodiment)
A first embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a plasma display panel 101 and a chassis member 105 made of aluminum die casting or formed by processing an aluminum flat plate in a first embodiment of the plasma display device according to the present invention. It is a figure which shows the state bonded on both sides of the adhesive material 109 of a shape. This figure is a view of the plasma display device as viewed from above. The plasma display panel 101 has a structure in which a front substrate 101a and a rear substrate 101b are bonded together, and the front substrate 101a is transparent. Discharge cells are formed between the substrates (101a and 101b).

  The stretch-peeled strip-shaped adhesive 109 is made of an acrylic or silicon-based synthetic resin material having good thermal conductivity, is highly stretchable, and has a pressure-sensitive adhesive layer, such as a hook or a hanger. It is used in a wide variety of applications, such as when an object is detachably mounted on a wall. Stretch-peelable strip-shaped adhesive 109 may be composed of liquid silicon or poster tape, and has a pressure-sensitive adhesive layer formed on both sides of an elastic substrate, or only a pressure-sensitive adhesive layer It may be composed of

  Further, the thermal conductivity can be further improved by adding a heat dissipating filler to the strip-like adhesive 109 of the stretch-release type. For example, silica, various types of alumina (such as crushed alumina, chamfered alumina, and spherical alumina), boron nitride, magnesia, aluminum nitride, silicon nitride, and the like can be used as the heat dissipation filler. Further, the strip-shaped adhesive 109 of the stretch peeling type is applied to the plasma display panel 101 or the chassis member 105 and cured by applying pressure, temperature, etc., so that the plasma display panel 101 and the chassis are bonded. It can be bonded between the member 105 and sandwiched.

  FIG. 2 is a diagram showing a state in which a plurality of strip-type adhesives 109 of stretch peeling type are sandwiched and bonded.

  The strip-shaped adhesive material 109 of the stretch-peeling type is easily stripped because pulling from one end direction of the strip shape causes distortion in the width direction of the strip shape, and the adhesive force is greatly reduced by this strain. In addition, since the paste material does not remain after peeling, the plasma display panel 101 and the chassis member 105 must be separated due to disassembly, repair, adjustment, or other circumstances of the plasma display device. The separation is very easy and requires very little man-hours. Moreover, it has an excellent feature that no paste remains on the plasma display panel 101 or the chassis member 105 when separated.

  Further, the adhesive 109 does not necessarily have a strip shape, and may have various other shapes, and it is also necessary to arrange them in parallel in the vertical direction and at equal intervals as shown in FIG. Instead, they may be arranged in a horizontal direction, an oblique direction, an arc shape, or any other shape and direction. The number, width, length, interval, and the like of the adhesive 109 shown in FIG. 2 are merely examples, and are not limited to those shown in FIG.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

  3 shows a plasma display panel 301 and a chassis member 305 made of aluminum die cast or formed by processing an aluminum flat plate in a second embodiment of the plasma display device according to the present invention. It is a figure which shows the state bonded on both sides of the several strip-shaped adhesive material 309 of type | formula.

  3 is also a view of the plasma display device as viewed from above, as in FIG. 1. The plasma display panel 301 has a structure in which a front substrate 301a and a rear substrate 301b are bonded together, and the front substrate 301a is transparent. Thus, a discharge cell is formed between the two substrates (301a and 301b).

  In the second embodiment of the present invention, as shown in FIG. 3, a heat transfer sheet 306 is disposed between the plasma display panel 301 and the chassis member 305 in close contact with the plasma display panel 301. In order to bond the sheet 306 and the chassis member 305, a plurality of strip-shaped adhesive members 309 that are stretch-released are disposed between the heat conductive sheet and the chassis member 305. Like the adhesive 109 in the first embodiment, the stretch-peeled strip-shaped adhesive 309 is strained in the strip-shaped width direction by being pulled from one end direction of the strip-shaped. Since the adhesive force is greatly reduced by strain, it can be easily peeled off. Further, the adhesive 309 is not necessarily required to have a strip shape, and may have various other shapes. It is also necessary to arrange the adhesive 309 in parallel in the vertical direction and at equal intervals as shown in FIG. Instead, they may be arranged in a horizontal direction, an oblique direction, an arc shape, or any other shape and direction. The number, width, length, interval, and the like of the adhesive 309 shown in FIG. 3 are merely examples, and are not limited to those shown in FIG.

  With such a configuration, the plasma display panel 301 and the chassis member 305 can be securely and stably bonded and held, and at the same time, they can be separated very easily when dismantling and repairing the plasma display device. Even when the plasma display panel 301 and the chassis member 305 have to be separated due to adjustment or other circumstances, the separation is very easy and requires very little man-hours.

  For example, graphite or various aluminum alloys can be used for the heat conductive sheet 306, and it is possible to realize a high heat radiation effect with a material that is easily available at a very low cost.

  According to the present invention, it is possible to provide a plasma display device that can securely and stably adhere and hold a plasma display panel and a chassis member and can be separated extremely easily when separating them. The industrial applicability is extremely high.

Sectional drawing of the state which bonded the plasma display panel and chassis member in 1st Embodiment of the plasma display apparatus which concerns on this invention The front view of the state which bonded the plasma display panel and chassis member in 1st Embodiment of the plasma display apparatus which concerns on this invention. Sectional drawing of the state which bonded the plasma display panel and chassis member in 2nd Embodiment of the plasma display apparatus which concerns on this invention. Schematic showing the structure of a plasma display panel in a conventional plasma display device The figure which shows the outline | summary of the electrode arrangement | sequence of the plasma display panel in the conventional plasma display apparatus typically An exploded perspective view showing an example of the overall configuration of a plasma display apparatus incorporating a conventional plasma display panel Sectional drawing of the state which adhered the plasma display panel and the chassis member in the conventional plasma display apparatus

Explanation of symbols

101, 301, 711 Plasma display panel 101a, 301a, 701 Front substrate 101b, 301b, 705 Rear substrate 105, 305, 715 Chassis member 105a, 305a, 715a Boss portion 109, 309 Adhesive material 306, 716 Thermal conductive sheet 702 Display electrode 703 Dielectric layer 704 Protective film 706 Overcoat layer 707 Address electrode 708 Partition 709 Phosphor layer 710 Discharge space 712 Front frame 713 Back cover 713a Vent hole 714 Front cover 717 Circuit block 718 Double-sided tape

Claims (5)

A flat plate-shaped plasma display panel in which a plurality of discharge cells are formed between the substrates and a pair of substrates transparent at least on the front side are arranged opposite to each other;
A chassis member for supporting the plasma display panel;
A stretch release adhesive disposed between the plasma display panel and the chassis member;
A plasma display device comprising: The plasma display apparatus according to claim 1, wherein the adhesive contains a heat dissipating filler. 2. The plasma display device according to claim 1, wherein the adhesive material is applied and cured by applying a liquid material. A flat plate-shaped plasma display panel in which a plurality of discharge cells are formed between the substrates and a pair of substrates transparent at least on the front side are arranged opposite to each other;
A chassis member for supporting the plasma display panel;
A heat conductive sheet disposed in contact with the plasma display panel;
A stretch-peelable adhesive disposed between the heat conductive sheet and the chassis member;
A plasma display device comprising: The plasma display apparatus as claimed in claim 4, wherein the heat conductive sheet is made of graphite or aluminum alloy.

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