JP2004309549A - Plasma display apparatus and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the separation of a panel from a holding plate easily performable, in a plasma display apparatus. <P>SOLUTION: The plasma display apparatus is provided with a panel mutually opposedly arranging a pair of substrates, of which at least the front side is transparent, so as to form a discharge space between the substrates and having a plurality of discharge cells, and a metal-made chassis member 14 held by making the panel interpose a thermal conductive member. The thermal conductive member is composed of an extension and exfoliation strip-like adhesive material 17, and the strip-like adhesive material 17 is a shape for widening the width of an exfoliation start point side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a plasma display device known as a large-screen, thin, and lightweight display device and a method for manufacturing the same.
[0002]
[Prior art]
2. Description of the Related Art In recent years, a plasma display device has attracted attention as a display panel (thin display device) having excellent visibility, and higher definition and a larger screen 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. At present, an AC-type and surface-discharge type plasma display device has become the mainstream due to its characteristics.
[0004]
In such a plasma display device, bonding between a glass-based panel and a metal holding plate such as aluminum is performed by using a double-sided adhesive made of an acrylic, urethane, or silicon-based material, or by heat conduction. It was fixed with a sheet interposed (see Patent Document 1).
[0005]
[Patent Document 1]
Japanese Patent No. 2807672
[Problems to be solved by the invention]
In such a plasma display device, the panel and the chassis member must not fall off during transportation or use, and in order to efficiently transmit heat generated by the panel to the chassis member, the panel and the chassis member must be removed. It is necessary to adhere to the whole by closely contacting them.
[0007]
On the other hand, in order to recycle the display when it breaks down due to some trouble and discard it, it is necessary to separate the metal chassis member from the glass panel.
[0008]
However, the panel and the chassis member must not fall off during transportation or use, and when the heat conductive sheet is used, the panel and the chassis member are more firmly bonded from the viewpoint of thermal efficiency. First, the panel had to be shattered, and the glass pieces had to be removed little by little with a scraper or the like from the chassis member. This separation work was very time-consuming and troublesome.
[0009]
The present invention solves such a problem, and an object of the present invention is to make it possible to easily separate 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 formed of a stretch-peeling strip-shaped adhesive, and the strip-shaped adhesive has a width on the peeling start point side. It has a wider shape.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
That is, according to the invention of claim 1 of the present invention, a panel having a plurality of discharge cells, wherein a pair of substrates having at least a front surface side are disposed to face each other so that a discharge space is formed between the substrates, A metal holding plate held with a conductive member interposed therebetween, wherein the heat conductive member is made of a strip-shaped adhesive of a stretch-peeling type, and the strip-shaped adhesive starts peeling. The shape is such that the width on the point side is widened.
[0012]
According to a second aspect of the present invention, in the first aspect, the strip-shaped adhesive has a shape in which the width gradually decreases from the peeling start point to the peeling end point.
[0013]
According to a third aspect of the present invention, in the first or second aspect, the strip-shaped adhesive is arranged such that the peeling start points of the adhesive are alternately positioned on opposing sides of the holding plate. Features.
[0014]
Furthermore, a fourth aspect of the present invention provides a panel having a plurality of discharge cells, wherein a pair of substrates having at least a transparent front surface are opposed to each other so that a discharge space is formed between the substrates, and the panel has a thermal conductivity. In a method for manufacturing a plasma display device including a metal holding plate held with a member interposed therebetween, the heat conductive member is formed of a strip-shaped adhesive of a stretch-peeling type, and the panel or the holding plate is formed. And a method of changing the amount of application such that the width of the adhesive at the peeling start point side is increased when the adhesive is applied.
[0015]
According to a fifth aspect of the present invention, in the fourth aspect, when applying the adhesive to the panel or the holding plate, a nozzle that moves while discharging the adhesive is used, and the application shape of the adhesive by the nozzle is changed. It is characterized by being changed.
[0016]
According to a sixth aspect of the present invention, in the fourth aspect, when applying the adhesive to the panel or the holding plate, a nozzle that moves while discharging the adhesive is used, and the moving speed of the nozzle is changed. The application amount of the adhesive is changed.
[0017]
According to a seventh aspect of the present invention, in the fourth aspect, when applying the adhesive to the panel or the holding plate, a nozzle that moves while discharging the adhesive is used, and the height when the nozzle is moved is used. Is changed to change the amount of the adhesive applied.
[0018]
Hereinafter, a plasma display device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9, but the embodiment of the present invention is not limited to this.
[0019]
FIG. 1 shows the structure of a panel in a plasma display device. As shown in FIG. 1, a plurality of rows of stripe-shaped display electrodes 2 formed of pairs of scanning electrodes and sustain electrodes are formed on a transparent front-side substrate 1 such as a glass substrate, and cover the electrode group. A dielectric layer 3 is formed as described above, and a protective film 4 is formed on the dielectric layer 3.
[0020]
A plurality of rows of stripes covered with an overcoat layer 6 are provided on a rear substrate 5 opposed to the front substrate 1 so as to intersect with the display electrodes 2 of the scanning electrodes and the sustain electrodes. Are formed. A plurality of partitions 8 are arranged on the overcoat layer 6 between the data electrodes 7 in parallel with the data electrodes 7, and the phosphor layers 9 are provided on the side surfaces between the partitions 8 and on the surface of the overcoat layer 6. I have.
[0021]
The substrate 1 and the substrate 5 are opposed to each other with a minute discharge space therebetween so that the display electrode 2 of the scan electrode and the sustain electrode and the data electrode 7 are substantially orthogonal to each other, and the periphery thereof is sealed. In the discharge space, one or a mixed gas of helium, neon, argon, and xenon is sealed as a discharge gas. The discharge space is partitioned into a plurality of partitions by partition walls 8, so that a plurality of discharge cells are provided at intersections between the display electrodes 2 and the data electrodes 7, and each of the discharge cells has a red, green, and blue color. The phosphor layers 9 are sequentially arranged for each color such that
[0022]
FIG. 2 shows an electrode arrangement of the plasma display panel. As shown in FIG. 2, the scan electrodes and the sustain electrodes and the data electrodes 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.
[0023]
In a plasma display panel having such an electrode configuration, an address discharge is performed between the data electrode and the scan electrode by applying a write pulse between the data electrode and the scan electrode, and after selecting a discharge cell, the scan electrode is By applying a periodic sustain pulse that is alternately inverted between the scan electrode and the sustain electrode, a sustain discharge is performed between the scan electrode and the sustain electrode to perform a predetermined display.
[0024]
FIG. 3 shows an example of the overall configuration of a plasma display device incorporating the panel having the structure described above. In the drawing, a housing for accommodating a panel 10 is composed of a front frame 11 and a metal back cover 12, and an opening of the front frame 11 has a front surface made of glass or the like which also protects the optical filter and the panel 10. A cover 13 is provided. The front cover 13 is coated with, for example, silver 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.
[0025]
The panel 10 is held by being adhered to a front surface of a chassis member 14 as a holding plate also serving as a heat radiating plate made of aluminum or the like via a stretch peeling adhesive (not shown) which is a heat conductive member, and A plurality of circuit blocks 15 for driving the panel 10 for display are attached to the rear side of the chassis member 14. The heat conductive adhesive is used to efficiently transmit the heat generated in the panel 10 to the chassis member 14 and radiate the heat. Further, the circuit block 15 includes an electric circuit for performing display driving of the panel 10 and controlling the display. The electrode block extends to the electrode lead-out portion led to the edge of the panel 10 beyond the four edges of the chassis member 14. It is electrically connected by a plurality of extending flexible wiring boards (not shown).
[0026]
A boss 14a for attaching the circuit block 15 and fixing the back cover 12 is formed on the rear surface of the chassis member 14 by integral molding such as die casting. The chassis member 14 may be configured by fixing a fixing pin to an aluminum flat plate.
[0027]
FIG. 4 shows a main part of a plasma display device according to an embodiment of the present invention. In the figure, reference numeral 10 denotes a panel. As described above, the panel 10 is formed by overlapping the substrate 1 constituting the front panel and the substrate 5 constituting the rear panel, and sealing the peripheral edge thereof with a bonding material 10a made of frit glass. It is constituted by doing. Reference numeral 16 denotes a flexible wiring board for connecting the panel 10 and the circuit block 15.
[0028]
Reference numeral 17 denotes the above-mentioned strip-shaped adhesive of the stretch-peeling type for adhering and holding the panel 10 to the chassis member 14, and is made of an acrylic or silicon synthetic resin material having good thermal conductivity. This stretch-peelable adhesive is highly stretchable and has a pressure-sensitive adhesive layer, and is used in a wide variety of applications, such as when an object such as a hook or a hanger is detachably mounted on a wall. . The stretch-separable adhesive 17 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. The pulling causes a strain in the width direction of the adhesive material 17, which significantly reduces the adhesive force and peels off. And a pressure-sensitive adhesive layer alone.
[0029]
FIG. 5 is a cross-sectional view in a direction perpendicular to the adhesive 17, and FIG. 6 is a plan view showing the application shape of the adhesive 17. As shown in FIGS. 5 and 6, the adhesive 17 has a wide width between the panel 10 and the chassis member 14 on the side of the peeling start point 17a, and gradually increases in width from the peeling start point 17a to the peeling end point 17b. It is arranged by applying in a narrow strip shape. In addition, the strip-shaped adhesives 17 are arranged such that the peeling start points 17a of the adhesives 17 are alternately located on opposing sides of the chassis member 14. That is, as shown in FIG. 6, the gaps between the strip-shaped adhesives 17 are arranged so as to be substantially constant and equal. Note that the adhesives 17 at both ends may be strips having the same width.
[0030]
Further, it is desirable that the strip-shaped adhesive 17 be disposed so that a part thereof protrudes from the panel 10 and the chassis member 14 by about several millimeters to several centimeters. That is, when the panel 10 is separated from the chassis member 14 serving as the holding plate, the adhesive 17 may be pulled with a part exposed from the end of the panel 10, whereby the adhesive force of the adhesive 17 decreases. The panel 10 and the chassis member 14 can be easily separated.
[0031]
FIG. 7 shows an example of a manufacturing process in the case where the panel and the chassis member are bonded, and the description will be given below.
[0032]
First, as shown in FIG. 7A, the panel 10 is positioned and installed on the lower die 18 of the press device, and moves while discharging the adhesive 17 as shown in FIG. 7B. Using a nozzle, a stretch-peelable heat conductive adhesive 17 is applied to the panel bonding surface side of the chassis member 14 to dispose it. At this time, when the adhesive 17 is applied, the adhesive 17 is applied by changing the application amount so that the width of the adhesive 17 on the side of the peeling start point is increased.
[0033]
Note that a chip tube 10b for evacuating the internal space of the panel 10 and enclosing the discharge gas is disposed on the back side of the panel 10.
[0034]
Thereafter, with the panel 10 facing down, the chassis member 14 is turned over such that the side on which the adhesive 17 of the chassis member 14 is disposed is the lower surface side, and as shown in FIG. The chassis members 14 are overlapped while performing alignment.
[0035]
Next, as shown in FIG. 7D, while applying a pressing force from above the chassis member 14 with the upper mold 19, the adhesive 17 is heated by a heater (not shown) arranged on the upper mold 19. By curing, the panel 10 and the chassis member 14 are bonded with the adhesive 17. FIG. 7E shows a state where the circuit block 15 is attached after the panel 10 and the chassis member 14 are bonded.
[0036]
Here, in FIG. 7 described above, the example in which the adhesive 17 is applied to the chassis member 14 has been described. However, as illustrated in FIG. 8, the adhesive 17 is applied to the back surface of the panel 10 to which the chassis member 14 is bonded. You may do so.
[0037]
Further, when the adhesive 17 is applied to the chassis member 14 as described above, the pressing force is applied from above the chassis member 14 by the upper mold 19 as shown in FIG. In addition, when the adhesive 17 is cured by heating, the adhesive 17 can be cured in a short time. When the adhesive 17 is applied to the panel 10 as shown in FIG. 8, the chassis member 14 may be heated.
[0038]
Here, when the adhesive 17 is applied to the panel 10 or the chassis member 14, the method of changing the application amount includes a method of changing the shape of the adhesive applied by the nozzle and a method of changing the moving speed of the nozzle to change the adhesive. And a method of changing the application amount of the adhesive by changing the height when the nozzle is moved.
[0039]
FIGS. 9A, 9B, and 9C show an example of a nozzle in the case of a method of changing the application shape of the adhesive by the nozzle. As shown in FIG. When using the rectangular nozzle 20 to move the adhesive 17 while discharging the adhesive 17, first, as shown in FIG. 9B, the adhesive 17 is discharged while the discharge port 20 a is in a horizontally long state, and the adhesive 17 is applied. Is started, and the nozzle 20 is rotated on the way to discharge the adhesive 17 in a state where the discharge port 20a is inclined as shown in FIG. The application shape can be easily applied to a shape having a gradually narrowing width. Further, by causing the nozzle 20 to move in the opposite direction, the application shape of the adhesive 17 can be easily applied to a shape gradually increasing in width.
[0040]
As described above, according to the present embodiment, the panel 10 is provided as the holding plate by disposing the stretch-peelable heat-conductive adhesive 17 between the panel 10 and the chassis member 14. When separating the panel 10 from the member 14, the adhesive force of the adhesive 17 is reduced by pulling the adhesive 17 from the end of the panel 10, so that the panel 10 and the chassis member 14 can be easily separated.
[0041]
Moreover, since the strip-shaped adhesive 17 has a shape in which the width on the side of the peeling start point 17a is widened, when the adhesive 17 is pulled and peeled, the resistance decreases as it goes deeper, so that the adhesive 17 is in the middle. The effect of being able to be easily peeled without breaking is obtained.
[0042]
【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 product can be sufficiently recycled. The effect is obtained that the adhesive can be easily peeled off without breaking in the middle.
[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 electric wiring diagram of the panel; FIG. 3 is an exploded perspective view showing an internal configuration of the plasma display device; FIG. 5 is a schematic cross-sectional view showing the bonding structure of the plasma display device. FIG. 5 is a cross-sectional view showing the same adhesive arrangement. FIG. 6 is a plan view showing the same adhesive arrangement. FIG. 8 is a schematic process diagram showing a process of bonding a panel and a chassis member. FIG. 8 is a schematic diagram showing another example of the process of the main part. FIG. 9 is an explanatory diagram showing an example of a nozzle used in the method of the present invention. [Explanation of symbols]
10 Panel 14 Chassis member 14b Groove 17 Adhesive 17a Peeling start point 17b Peeling end point 20 Nozzle

Claims (7)

A panel having at least a pair of transparent substrates facing each other such that a discharge space is formed between the substrates and having a plurality of discharge cells, and a metal plate that is held with a heat conductive member interposed therebetween. A holding plate, wherein the heat conductive member is formed of a strip-shaped adhesive of a stretch-peeling type, and the strip-shaped adhesive has a shape in which a width on a peeling start point side is widened. Plasma display device. 2. The plasma display device according to claim 1, wherein the width of the strip-shaped adhesive is gradually reduced from a peeling start point to a peeling end point. 3. The plasma display device according to claim 1, wherein strip-shaped adhesives are arranged such that peeling start points of the adhesive are alternately positioned on opposing sides of the holding plate. A panel having at least a pair of transparent substrates facing each other such that a discharge space is formed between the substrates and having a plurality of discharge cells, and a metal plate that is held with a heat conductive member interposed therebetween. In the method for manufacturing a plasma display device having a holding plate, the heat conductive member is formed of a strip-shaped adhesive of a stretch-peeling type, and when the adhesive is applied to the panel or the holding plate, the bonding is performed. A method for manufacturing a plasma display device, comprising: changing a coating amount so as to increase a width of a material at a separation start point side. 5. The plasma display apparatus according to claim 4, wherein when applying the adhesive to the panel or the holding plate, a nozzle that moves while discharging the adhesive is used, and a shape of the applied adhesive by the nozzle is changed. Manufacturing method. 5. The method according to claim 4, wherein, when applying the adhesive to the panel or the holding plate, a nozzle that moves while discharging the adhesive is used, and the amount of the adhesive applied is changed by changing the moving speed of the nozzle. 3. The method for manufacturing a plasma display device according to item 1. When applying adhesive to a panel or holding plate, a nozzle that moves while discharging the adhesive is used, and the amount of adhesive applied is changed by changing the height when moving the nozzle. The method of manufacturing a plasma display device according to claim 4.

Images