JP4007237B2 - Plasma display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plasma display device known as a thin, lightweight display device having a large screen.
[0002]
[Prior art]
In recent years, plasma display devices have attracted attention as display panels (thin display devices) with excellent visibility, and higher definition and larger screens are being promoted.
[0003]
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, AC-type and surface-discharge-type plasma display devices are mainly used.
[0004]
In such a plasma display device, a glass-based panel is bonded to a metal holding plate such as aluminum by using a double-sided adhesive made of acrylic, urethane, or silicon material, or heat conduction. A sheet was interposed and fixed (see Patent Document 1).
[0005]
[Patent Document 1]
Japanese Patent No. 2807672 [0006]
[Problems to be solved by the invention]
In such a plasma display device, the panel and the chassis member should not fall off during transportation or use, and in order to efficiently transfer the heat generated in the panel to the chassis member, the panel and the chassis member. It is necessary to adhere to each other as a whole.
[0007]
On the other hand, in order to recycle when the display breaks down due to some trouble and is discarded, it is necessary to separate the chassis member made of metal and the panel made of glass.
[0008]
However, the panel and chassis member must not fall off during transportation or use, and the heat conduction sheet is more firmly bonded from the viewpoint of thermal efficiency. First, the panel had to be shattered, and the glass pieces had to be removed from the chassis member little by little with scraping or the like. This separation work was very time consuming and laborious.
[0009]
The present invention solves such a problem, and an object thereof is to facilitate separation of a panel and a holding plate.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, in the plasma display device of the present invention, the heat conductive member is arranged in the peripheral portion of the panel so that a part thereof protrudes between the panel and the holding plate, and the panel and the holding plate are arranged. It is composed of a stretch-peeling adhesive to be bonded and a non-adhesive heat conductive sheet disposed in the center of the panel .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
That is, according to the first aspect of the present invention, a panel having a plurality of discharge cells and a pair of substrates that are transparent at least on the front side so as to form a discharge space between the substrates, A metal holding plate that is held with a conductive member interposed therebetween, and the thermal conductive member is disposed at a peripheral portion of the panel so that a part thereof protrudes between the panel and the holding plate. It is composed of a stretch-peelable adhesive that bonds the panel and the holding plate, and a non-adhesive heat conductive sheet disposed in the center of the panel .
[0012]
Hereinafter, a plasma display device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8, but the embodiment of the present invention is not limited thereto.
[0013]
FIG. 1 shows a structure of a panel in the plasma display device. As shown in FIG. 1, on a transparent front substrate 1 such as a glass substrate, a plurality of rows of stripe-shaped display electrodes 2 which are paired with a scan electrode and a sustain electrode are formed, and covers the electrode group. Thus, the dielectric layer 3 is formed, and the protective film 4 is formed on the dielectric layer 3.
[0014]
A plurality of rows of stripes covered with an overcoat layer 6 are formed on the rear substrate 5 opposite to the front substrate 1 so as to intersect the display electrodes 2 of the scan electrodes and the sustain electrodes. The data electrode 7 is formed. On the overcoat layer 6 between the data electrodes 7, a plurality of barrier ribs 8 are arranged in parallel with the data electrodes 7, and a phosphor layer 9 is provided on the side surface between the barrier ribs 8 and on the surface of the overcoat layer 6. Yes.
[0015]
The substrate 1 and the substrate 5 are opposed to each other with a minute discharge space so that the display electrode 2 and the data electrode 7 of the scan electrode and the sustain electrode are almost orthogonal to each other, and the periphery is sealed, In the discharge space, one or a mixed gas of helium, neon, argon, and xenon is sealed as a discharge gas. In addition, the discharge space is divided into a plurality of sections by partition walls 8 to provide a plurality of discharge cells where the intersections of the display electrodes 2 and the data electrodes 7 are located, and each of the discharge cells has red, green and blue colors. The phosphor layers 9 are sequentially arranged one by one so that
[0016]
FIG. 2 shows an electrode arrangement of this plasma display panel. As shown in FIG. 2, the scan electrode, the sustain electrode, and the data electrode have a matrix configuration of M rows × N columns, and M rows of scan electrodes SCN1 to SCNM and sustain electrodes SUS1 to SUSM are arranged in the row direction. N columns of data electrodes D1 to DN are arranged in the column direction.
[0017]
In the plasma display panel having such an electrode configuration, an address pulse is applied between the data electrode and the scan electrode by applying a write pulse between the data electrode and the scan electrode, and after selecting the discharge cell, the scan electrode By applying a periodic sustain pulse that is alternately inverted between the sustain electrode and the sustain electrode, a sustain discharge is performed between the scan electrode and the sustain electrode to perform a predetermined display.
[0018]
FIG. 3 shows an example of the overall configuration of a plasma display device incorporating the panel having the structure described above. In the figure, a housing for housing the panel 10 is composed of a front frame 11 and a metal back cover 12, and an opening of the front frame 11 is made of a glass or the like that also serves as an optical filter and panel 10 protection. A cover 13 is arranged. Further, the front cover 13 is subjected to, for example, silver vapor deposition in order to suppress unnecessary radiation of electromagnetic waves. Further, the back cover 12 is provided with a plurality of ventilation holes 12a for releasing heat generated in the panel 10 and the like to the outside.
[0019]
The panel 10 is held by adhering to the front surface of the chassis member 14 as a holding plate that also serves as a heat sink made of aluminum or the like via a heat conductive member, and on the rear surface side of the chassis member 14 is the panel 10. A plurality of circuit blocks 15 for driving the display are attached. The heat conductive member is for efficiently transferring heat generated in the panel 10 to the chassis member 14 to dissipate heat. Further, the circuit block 15 includes an electric circuit for performing display driving of the panel 10 and controlling the panel 10, and extends beyond the four side edges of the chassis member 14 to the electrode lead-out part drawn to the edge part of the panel 10. They are electrically connected by a plurality of extending flexible wiring boards (not shown).
[0020]
A boss portion 14a for attaching the circuit block 15 or fixing the back cover 12 is protruded from the rear surface of the chassis member 14 by die-casting or the like. The chassis member 14 may be configured by fixing a fixing pin to an aluminum flat plate.
[0021]
4 to 6 show the main part of the plasma display device according to one embodiment of the present invention. In the figure, reference numeral 10 denotes a panel. As described above, the panel 10 is configured such that the substrate 1 constituting the front panel and the substrate 5 constituting the back panel are overlapped, and the peripheral portion is sealed with a bonding material 10a made of frit glass. It is comprised by doing. Reference numeral 16 denotes a flexible wiring board for connecting the panel 10 and the circuit block 15.
[0022]
Further, the panel 10 is held by the chassis member 14 with a heat conductive member 17 interposed therebetween, and the heat conductive member 17 is disposed at the periphery as shown in FIG. 14 and an exfoliation-type adhesive 17a that adheres to the substrate 14 and a non-adhesive heat conductive sheet 17b disposed in the center. The stretch-peelable adhesive material 17a is made of an acrylic or silicon-based synthetic resin material having a good thermal conductivity, is quite stretchable, has a pressure-sensitive adhesive layer, and is used to attach objects such as hooks and hangers. It is used in a wide variety of applications, such as when it is detachably mounted on a wall. The stretch-peeling adhesive 17a is disposed between the panel 10 and the chassis member 14, and is cured by applying a pressing force to bond the panel 10 and the chassis member 14 together. By pulling, distortion occurs in the width direction of the adhesive material 17a, and the adhesive force is greatly reduced due to the distortion, and the adhesive material 17a is peeled off. Some have a pressure-sensitive adhesive layer on both sides, and others have only a pressure-sensitive adhesive layer.
[0023]
Further, as shown in FIGS. 4 and 5, the adhesive material 17 a is disposed by being applied between the panel 10 and the chassis member 14, and a part of the adhesive material 17 a is between the panel 10 and the chassis member 14. It is provided to protrude from millimeters to several centimeters. That is, when the panel 10 is separated from the chassis member 14 which is a holding plate, the adhesive material 17a may be pulled with a portion exposed from the end portion of the panel 10 as shown in FIG. The panel 10 and the chassis member 14 can be easily separated.
[0024]
Further, the non-adhesive heat conductive sheet 17b is made of a non-adhesive sheet material having good acrylic and silicon thermal conductivity. The non-tackiness referred to here includes those having adhesive strength but having such adhesive strength that can be easily peeled off.
[0025]
FIG. 6 shows an example of a manufacturing process in the case where the panel and the chassis member are bonded, which will be described below.
[0026]
First, the panel 10 is positioned and installed in a press device, and on the other hand, as shown in FIG. 6 (a), a stretch-peeling type heat conductive adhesive 17a is applied to the peripheral portion of the chassis member 14 on the panel adhesive surface side. The heat conductive sheet 17b is disposed at the center.
[0027]
Thereafter, as shown in FIG. 6B, the chassis member 14 is aligned with the panel 10 while being aligned, and the adhesive 17a is cured by heating with a heater (not shown) while applying a pressing force. The panel 10 and the chassis member 14 are bonded together with an adhesive 17a.
[0028]
Here, in FIG. 6, the example in which the adhesive material 17 is applied to the chassis member 14 side has been described. However, the adhesive material 17a is applied to the back side of the panel 10 to which the chassis member 14 is bonded, and the heat conductive sheet 17b is applied. It may be arranged.
[0029]
Further, when the adhesive material 17a is applied to the chassis member 14 as described above, when the panel material 10 is heated and heated to cure the adhesive material 17a while applying a pressing force, it takes a short time. The adhesive material 17a can be cured. In addition, what is necessary is just to make it heat the chassis member 14 when apply | coating the adhesive material 17a to the panel 10 side.
[0030]
As described above, according to the present embodiment, the stretch-peelable heat conductive adhesive 17a is arranged in the peripheral portion between the panel 10 and the chassis member 14, and the central portion is a non-adhesive heat conductive sheet. By arranging 17b, when the panel 10 is separated from the chassis member 14 which is a holding plate, the adhesive material 17a is reduced in adhesive force by pulling the adhesive material 17a from the end of the panel 10, so that the panel can be easily 10 and the chassis member 14 can be separated. In addition, in a plasma display device used as a large-screen display device, if the adhesive material 17a is applied to the whole, the adhesive material 17a may be broken in the middle when the adhesive material 17a is pulled and peeled off. However, since only the peripheral portion is used in the present embodiment, such a problem does not occur.
[0031]
【The invention's effect】
As is clear from the above description, according to the plasma display device of the present invention, the panel and the holding plate can be easily separated at the time of disposal or the like, and the effect that the product can be sufficiently recycled. Is obtained.
[Brief description of the drawings]
1 is a perspective view showing a panel structure of a plasma display device according to an embodiment of the present invention. FIG. 2 is an electrical wiring diagram of the panel. FIG. 3 is an exploded perspective view showing an internal configuration of the plasma display device. ] Schematic cross-sectional view showing the bonding structure of the plasma display device. [FIG. 5] Plan view showing the arrangement of the adhesive material. [FIG. 6] Schematic showing the steps for bonding the panel and chassis member in the plasma display device. Process diagram [Explanation of symbols]
10 Panel 14 Chassis member 14b Groove 17a Adhesive 17b Thermal conductive sheet

Claims (1)

A panel having a plurality of discharge cells opposed to each other so that a discharge space is formed between the substrates at least on a pair of transparent substrates on the front side, and a metal made by holding the panel with a heat conductive member interposed therebetween A holding plate, and the thermally conductive member is disposed at a peripheral portion of the panel so that a part thereof protrudes from between the panel and the holding plate, and is bonded to the panel and the holding plate. A plasma display device comprising a material and a non-adhesive heat conductive sheet disposed in the center of the panel .

Images