JP4352680B2 - Method for manufacturing plasma display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing 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 pair of transparent glass substrates are arranged so as to face each other so that a discharge space is formed therebetween, and an electrode group is arranged on the glass substrate (hereinafter referred to as a panel), and this panel A panel module is composed of a chassis member that holds the frame and a display drive circuit block that is attached to the chassis member and applies a signal to the panel to perform display, and the panel module is covered with a casing to form a finished product. (See Patent Document 1).
[0005]
Such a plasma display device has a feature that it is easy to realize a large screen as compared with other display devices such as a liquid crystal display device and a CRT, and a clear image can be obtained as compared with other large display devices. For this reason, it is attracting attention as an information display device in a place where many people gather, and as a video device that can enjoy powerful images at home.
[0006]
On the other hand, while this plasma display device is easy to realize a large screen, a large glass substrate is required as a glass substrate which is a main component of the panel, and an image is obtained by selectively plasma-discharging a plurality of discharge cells. Therefore, in the plasma display device, it is required to examine measures for matters that need not be considered in other display devices.
[0007]
[Patent Document 1]
Japanese Patent No. 2807672 [0008]
[Problems to be solved by the invention]
By the way, this plasma display device is configured to generate a discharge in a specific discharge cell by selectively applying a pulse voltage to each electrode constituting the discharge cell of the panel, thereby displaying an image. In order to generate a pulse signal in an electric circuit used for driving, many semiconductor elements which are driving ICs are used.
[0009]
As is well known, in order to protect such a semiconductor element from static electricity from the time of transportation, a packaging member using a conductive member is used, and care must be taken in its handling. Sometimes it is handled with great care to destroy it due to static electricity.
[0010]
However, as attention is paid as a thin display device and the production volume increases, the destruction of the driving IC connected to each electrode of the panel increases in the production process even though careful handling is taken. It has become a major issue.
[0011]
The present invention has been made in view of such a situation, and an object thereof is to prevent destruction of a driving IC at the time of assembling a plasma display device.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an electrode lead-out terminal in which a pair of substrates on which an electrode group is arranged are arranged to face each other so that a discharge space is formed between the substrates and is connected to the electrodes at the end of the substrate. A drive circuit block having a panel formed of aluminum, a chassis member made of aluminum for holding the panel on the front surface, and a semiconductor element attached to the rear surface side of the chassis member and applying a signal to the electrode of the panel A printed wiring board and a flexible wiring board having one end connected to the electrode lead terminal of the panel and the other end connected to the printed wiring board of the drive circuit block. After connecting, attach the panel to the chassis member, then attach the printed circuit board of the drive circuit block to the chassis member Thereafter, a conductive static elimination jig whose one end is grounded via the chassis member is brought into contact with the conductive portion of the flexible wiring board to perform a static elimination process for grounding the conductive portion of the flexible wiring board, and then the flexible wiring board. And the printed circuit board of the driving circuit block are connected to each other, and the destruction of the driving IC at the time of assembling the plasma display device can be prevented.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
That is, the present invention relates to a panel in which a pair of substrates on which an electrode group is arranged are arranged to face each other so that a discharge space is formed between the substrates, and an electrode lead terminal connected to the electrode is formed at an end of the substrate; A chassis member made of aluminum for holding the panel on the front surface, and a printed circuit board of a drive circuit block having a semiconductor element attached to the rear side of the chassis member and applying a signal to the electrode of the panel; A flexible wiring board having one end connected to the electrode lead terminal of the panel and the other end connected to the printed wiring board of the drive circuit block, and after connecting the flexible wiring board to the electrode lead terminal of the panel, A panel is attached to the chassis member, and then a printed circuit board of a drive circuit block is attached to the chassis member. Conducting a static elimination process for grounding the conductive portion of the flexible wiring board by bringing a conductive static elimination jig whose one end is grounded through a contact member into contact with the conductive portion of the flexible wiring board, and then driving the flexible wiring board and the drive circuit A method of manufacturing a plasma display device, comprising connecting a printed wiring board of a block .
[0015]
Hereinafter, a method for manufacturing a plasma display apparatus according to an embodiment of the present invention will be described with reference to FIGS.
[0016]
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 stripe-shaped display electrodes 2 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.
[0017]
Further, 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. Address electrodes 7 are formed. On the overcoat layer 6 between the address electrodes 7, a plurality of barrier ribs 8 are arranged in parallel with the address 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.
[0018]
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 address 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. Further, 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 address 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
[0019]
FIG. 2 shows an electrode arrangement of this plasma display panel. As shown in FIG. 2, the scan electrode, the sustain electrode, and the address 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 address electrodes D1 to DN are arranged in the column direction.
[0020]
In the surface discharge type 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 a discharge cell is selected. Thereafter, 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, and a predetermined display is performed.
[0021]
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.
[0022]
The panel 10 is held by adhering to the front surface of a chassis member 14 made of aluminum via a heat conductive sheet 15, and a plurality of circuit blocks for driving the panel 10 to be displayed on the rear surface side of the chassis member 14. 16 is attached. The heat conductive sheet 15 is for efficiently transferring the heat generated in the panel 10 to the chassis member 14 to radiate heat. Further, the circuit block 16 includes an electric circuit for performing display driving of the panel 10 and its control, and the electrode lead-out portion led out to the edge portion of the panel 10 extends beyond the four edge portions of the chassis member 14. They are electrically connected by a plurality of extending flexible wiring boards (not shown).
[0023]
Further, a boss portion 14a for attaching the circuit block 16 or fixing the back cover 12 is protruded from the rear surface of the chassis member 14 by integral molding using die casting or the like. The chassis member 14 may be configured by fixing a fixing pin to an aluminum flat plate.
[0024]
FIG. 4 is a plan view showing the internal arrangement structure of the plasma display device having such a structure with the back cover 12 removed, and in FIG. 4, the scan driver circuit block 20 applies a predetermined signal voltage to the scan electrodes of the panel 10. The sustain driver circuit block 21 supplies a predetermined signal voltage to the sustain electrode of the panel 10, and the address driver circuit block 22 supplies a predetermined signal voltage to the address electrode of the panel 10. The scan driver circuit block 20 The sustain driver circuit blocks 21 are disposed at both ends of the chassis member 14 in the width direction, and the address driver circuit blocks 22 are disposed at the upper end and the lower end of the chassis member 14 in the height direction.
[0025]
The control circuit block 23 converts the image data into an image data signal corresponding to the number of pixels of the panel 10 based on the video signal from the input circuit, supplies the image data signal to the address driver circuit block 22, and generates a discharge control timing signal. These are respectively supplied to the scan driver circuit block 20 and the sustain driver circuit block 21 to perform display drive control such as gradation control, and are arranged at substantially the center of the chassis member 14. The power supply block 24 supplies a voltage to each of the circuit blocks, and is arranged at a substantially central portion of the chassis member 14 like the control circuit block 23. The bracket 25 is attached with a tip end portion of a stand pole attached to a stationary stand, whereby the panel can be held upright.
[0026]
Flexible wiring boards 26 and 27 as wiring boards connect the electrode lead-out terminals of the scan electrodes and sustain electrodes of the panel 10 and the printed wiring boards of the scan driver circuit block 20 and the sustain driver circuit block 21, and also as wiring boards. The flexible wiring board 28 connects the electrode lead terminal of the address electrode of the panel 10 and the printed wiring board of the address driver circuit block 22. Each flexible wiring board 26 to 28 has one end of each electrode of the panel 10. The other end of the circuit block is connected to the electrode lead-out terminal, and the other end is bent by 180 degrees from the front side to the back side through the outer periphery, and is connected to the printed wiring board of each circuit block via a connector. FIG. 5 shows a state before the flexible wiring boards 26 to 28 are connected to the respective circuit blocks, as viewed from the front side of the panel 10.
[0027]
The present invention prevents the driving ICs used in the respective driving circuit blocks from being destroyed in the manufacturing process of the plasma display device, and an embodiment thereof will be described below.
[0028]
In the manufacturing method of the present invention, after manufacturing the panel 10 configured as shown in FIG. 1, first, as shown in FIG. 5, flexible wiring boards 26 to 28 are connected to the respective electrode lead terminals of the panel 10, Thereafter, the panel 10 is attached to the chassis member 14 as described above. Then, each circuit block is attached to the chassis member 14 using screws or the like.
[0029]
Then, after performing the static elimination process which earth | grounds the conductive part of the flexible wiring board 28 connected to the address electrode of the panel 10, the flexible wiring board 28 is connected to the drive circuit block of an address electrode, and it is used as the sustain electrode of the panel 10 after that. The connected flexible wiring board 27 is connected to the drive circuit block of the sustain electrode. Then, after performing the static elimination process which earth | grounds the conductive part of the flexible wiring board 26 connected to the scan electrode of the said panel 10, the assembly is completed by connecting the flexible wiring board 26 to the drive circuit block of a scan electrode. .
[0030]
After that, various circuit adjustments and confirmation operations are performed, and other parts are attached and casings to complete the product.
[0031]
By the way, as described above, the panel 10 of the plasma display device has a structure in which components such as electrodes and other dielectrics are formed on a glass substrate, and discharge is generated in each discharge cell by using electric charges between the electrodes. Further, since it is manufactured through a plurality of processes, static electricity is likely to be accumulated in the panel 10, and the flexible wiring boards 26 to 28 are connected to the printed wiring boards of the respective drive circuit blocks while the static electricity is still accumulated. Then, an excessive voltage is applied to the driving IC and it is destroyed. Therefore, in the present invention, after connecting the flexible wiring boards 26 to 28 to the panel, before connecting the flexible wiring boards 26 to 28 to the printed wiring board of the drive circuit block, the printed wiring of the flexible wiring boards 26 to 28 is provided. A neutralization process is performed to ground the conductive portion connected to the plate, thereby preventing the driving IC from being destroyed.
[0032]
FIG. 6 and FIG. 7 show the state of static elimination processing when assembling the address driver circuit block and the scan driver circuit block, and FIG. 8 shows an example of the static elimination jig. As shown in FIG. 8, the static elimination jig 29 has a structure in which a handle 31 is attached to a holding plate 30 made of a conductive member. The holding plate 30 has a ground lead wire 32 grounded at one end and a clip 33 at the tip. The attached earth lead wire 34 is electrically connected and attached.
[0033]
In charge elimination of the flexible wiring board 28 connected to the address electrode of the panel 10, as shown in FIG. 6, by attaching a grounding clip 33 of the lead 34 of the static elimination jig 29 to the chassis member 14, chassis member 14 The holding plate 30 of the static elimination jig 29 is pressed against the conductive portions of the plurality of flexible wiring boards 28 connected to the connector of the printed wiring board while the static elimination jig 29 is grounded .
[0034]
Further, in the static elimination process of the flexible wiring board 26 connected to the scan electrode of the panel 10, as shown in FIG. 7, the clip 33 of the ground lead wire 34 of the static elimination jig 29 is attached to the chassis member 14 and the chassis member 14 This is performed by grounding the static elimination jig 29 and pressing the presser plate 30 of the static elimination jig 29 with the static elimination receiving jig 35 placed under the conductive portions of the plurality of flexible wiring boards 26.
[0035]
In this way, the static elimination jig 29 is brought into electrical contact with the conductive portions of the flexible wiring boards 26 and 28, and the panel 10 is grounded, whereby static electricity accumulated in the panel 10 is removed, and the flexible wiring boards 26 and 28 are connected. When connected to the printed wiring board of the circuit block, excessive static electricity is not applied to the driving IC.
[0036]
As is apparent from the above description, according to the present embodiment, after performing the static elimination treatment for grounding the conductive portions of the flexible wiring boards 26 and 28 connected to the address electrodes and the scan electrodes of the surface discharge type panel, The flexible wiring boards 26 and 28 are connected to the drive circuit blocks of the address electrode and the scan electrode, so that the driving IC used in each drive circuit block can be prevented from being destroyed.
[0037]
【The invention's effect】
As is apparent from the above description, according to the present invention, a pair of substrates on which electrode groups are arranged are arranged so as to form a discharge space between the substrates, and are connected to the electrodes at the ends of the substrates. A panel having electrode lead terminals, a chassis member made of aluminum for holding the panel on the front surface, and a semiconductor element attached to the rear surface side of the chassis member and applying a signal to the electrode of the panel A printed circuit board of the drive circuit block and a flexible circuit board having one end connected to the electrode lead terminal of the panel and the other end connected to the print circuit board of the drive circuit block, and flexible to the electrode lead terminal of the panel After connecting the wiring board, the panel is attached to the chassis member, and then the printed wiring board of the drive circuit block is attached to the chassis member. After the mounting, a conductive static elimination jig whose one end is grounded through the chassis member is brought into contact with the conductive part of the flexible wiring board to perform a static elimination process for grounding the conductive part of the flexible wiring board. A method of manufacturing a plasma display device comprising connecting a wiring board and a printed wiring board of a driving circuit block, and an effect of preventing destruction of a driving IC at the time of assembly of the plasma display device is obtained. .
[Brief description of the drawings]
1 is a perspective view showing an example of a schematic structure of a panel of a plasma display device. FIG. 2 is a wiring diagram showing an example of an electrode arrangement of the panel. FIG. 3 is an exploded perspective view showing an example of the overall configuration of the plasma display device. FIG. 4 is a plan view showing an example of an arrangement structure on the drive circuit block side in the apparatus. FIG. 5 is a plan view also viewed from the panel side. FIG. FIG. 7 is a plan view showing the state of the neutralization process on the scanning side. FIG. 8 is a perspective view showing an example of the static elimination jig.
DESCRIPTION OF SYMBOLS 10 Panel 20 Scan driver circuit block 21 Sustain driver circuit block 22 Address driver circuit block 26, 27, 28 Flexible wiring board 29 Static elimination jig

Claims (1)

A panel in which a pair of substrates on which electrode groups are arranged are arranged opposite to each other so as to form a discharge space between the substrates, and an electrode lead-out terminal connected to the electrode is formed at an end of the substrate; A chassis member made of aluminum for holding, a printed circuit board of a drive circuit block having a semiconductor element attached to the rear side of the chassis member and applying a signal to the electrode of the panel, and an electrode lead of the panel A flexible wiring board having one end connected to the terminal and the other end connected to the printed wiring board of the drive circuit block, and after connecting the flexible wiring board to the electrode lead-out terminal of the panel , the panel is connected to the chassis member After mounting, after attaching the printed circuit board of the drive circuit block to the chassis member, one end through the chassis member Perform charge elimination grounding the conductive portions of the flexible wiring board by contacting the grounded conductive neutralization jig conductive portions of the flexible wiring board, a printed wiring board then the flexible wiring board and the drive circuit block A method of manufacturing a plasma display device, comprising: connecting.

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