JPH08304779A - Production of plasma address display device - Google Patents

Abstract

PURPOSE: To decrease deviations in pitch and to make dealing with a trend toward larger sizes possible by dividing printing parts to plural parts and subjecting the respective parts to screen printing at the time of screen printing of electrodes or insulators to a stripe form. CONSTITUTION: The striped printing parts to be screen printed are divided to >=2 parts and the respective divided printing parts are respectively subjected to the screen printing at the time of forming the display electrodes 31 or barrier ribs (insulators) 33 to the stripe form by the screen printing in the process for producing a plasma address display device formed by laminating liquid crystal cells 2 and plasma cells 3 via a dielectric sheet 4. The striped printing parts are preferably divided in the pitch direction of the stripes and further preferably, the barrier rib printing parts are divided in the pitch direction of the stripes at the time of screen printing of the striped barrier ribs 33 in superposition on the striped electrodes 32. The respective divided printing parts are then preferably printed by using the screens corresponding to the divided barrier rib printing parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a plasma addressed display device in which a liquid crystal cell and a plasma cell are laminated via a dielectric sheet.

[0002]

2. Description of the Related Art In recent years, there has been proposed a plasma address display device in which a liquid crystal cell and a plasma cell are laminated via a dielectric sheet. FIG. 2 shows an example of the structure of this plasma addressed display device.

The plasma addressed display device of FIG. 2 has a flat panel structure in which a liquid crystal cell 2 and a plasma cell 3 are laminated with a dielectric sheet 4 in between. The liquid crystal cell 2 is joined to the dielectric sheet 4 with the color filter substrate 21 having a predetermined gap with the liquid crystal sealing material 22 interposed therebetween. Although not shown, stripe-shaped data electrodes made of a transparent conductive material and extending in the row direction are formed in parallel on the inner surface of the color filter substrate 21 in the column direction (the vertical direction in the drawing). Color filter substrate 21 and dielectric sheet 4
A liquid crystal layer 23 is formed by filling liquid crystal in a gap between the liquid crystal layer 23 and Although not shown in FIG. 2, spacers are provided in the liquid crystal layer 23 in order to make the gap size uniform.

In the plasma cell 3, the plasma substrate glass 31 faces the dielectric sheet 4 with a predetermined gap. Plasma substrate glass 31 on the side of the dielectric sheet 4
A striped display electrode 32 made of nickel or the like is formed on the upper side of the display electrode 32. The striped display electrode 32 extends in the column direction and is formed in parallel with a predetermined gap in the row direction. The barrier ribs 33, which are narrower than the display electrodes 32, are formed by overlapping the display electrodes 32 at an equal pitch. The plasma substrate glass 31 faces the dielectric sheet 4 with a predetermined gap therebetween via the display electrode 32 and the barrier rib 33. A closed space defined by the display electrode 32 and the barrier rib 33 as a partition wall 5 is configured as a plasma chamber 34.
4 extend in the column direction and are formed in the row direction at predetermined intervals. The plasma chamber 34 is filled with an ionizable gas. As this gas, for example, helium, neon, argon or a mixed gas thereof is used. As described above, the display electrode 32 and the barrier rib 33 serve as the partition wall 5 for partitioning each plasma chamber and also serve as a gap spacer for each plasma chamber 34. The display electrodes 32 are connected to the drivers so as to alternately serve as the anode display electrodes 32A and the cathode display electrodes 32K. A ring-shaped frit seal 35 made of low-melting glass or the like is arranged around the plasma substrate glass 31, and the plasma substrate glass 31 and the dielectric sheet 4 are hermetically joined by the frit seal 35.

In the above plasma addressed display device, the data electrodes and the plasma chambers 34 are orthogonal to each other, the data electrodes serve as column drive units, the plasma chambers 34 serve as row drive units, and pixels are defined at the intersections thereof. . In such a plasma addressed display device, the anode display electrode 3
When a predetermined voltage is applied between 2A and the cathode display electrode 32K, the gas in the plasma chamber 34 is selectively ionized to generate plasma discharge, and the inside thereof is maintained at substantially the anode potential. In this state, when a data voltage is applied to the data electrode, the data voltage is written to the liquid crystal layer 23 of the pixels arranged in the column direction corresponding to the plasma chamber 34 via the dielectric sheet 4. When the plasma discharge ends, the plasma chamber 34 becomes a floating potential, and the voltage written in the liquid crystal layer 23 of the corresponding pixel is held until the next writing period (for example, one frame later). At this time, the plasma chamber 34 functions as a sampling switch, and the liquid crystal layer 23 of each pixel functions as a sampling capacitor.

The data electrode 1 is provided for the liquid crystal layer 23 of each pixel.
Since the liquid crystal operates according to the data voltage written from 5, the display is performed in pixel units. Therefore, the liquid crystal layer 23 of a plurality of pixels arranged in the column direction is generated by generating plasma discharge.
A two-dimensional image can be displayed by sequentially scanning the plasma chamber 34 in which the data voltage is written in the row direction.

A method for manufacturing such a plasma addressed display device will be briefly described with reference to FIG.
As shown in (A), a display electrode pattern is printed on the plasma substrate glass 31 in a stripe shape by a screen printing method and then dried to form a display electrode 32.

Next, the display electrodes 3 formed in stripes
Barrier ribs 33 are also laminated on 2 by screen printing at the same pitch as shown in FIG. 3 (B). In this case, the barrier rib 33 has a height of about 200 μm, so that the height is obtained by repeating screen printing and applying multiple layers. After printing the barrier ribs with a predetermined height, baking is performed to polish the upper portions of the barrier ribs so that the barrier ribs have the same height.

Then, as shown in FIG. 3C, a frit seal 35 is formed around the plasma substrate glass 31 by a dispenser or the like, and the glass dielectric sheet 4 is placed on the barrier rib through the frit seal 35. In this state, it is bonded to the plasma substrate glass and gas is injected into the formed plasma chamber 34.

Next, an alignment treatment (not shown) is performed, and the alignment shown in FIG.
As shown in (D), spacers 24 for making the liquid crystal layer have a uniform thickness are scattered, and the color filter 21 is bonded to the dielectric sheet 4 via the liquid crystal sealing material 22 to form a liquid crystal chamber. After that, liquid crystal is injected to obtain the plasma addressed display device shown in FIG.

By the way, the reason why the barrier rib 33 is laminated on the display electrode 32 is to increase the aperture ratio of each pixel. For this purpose, as shown in FIG.
The stripe-shaped display electrodes 32 are formed on the plasma substrate glass 31 by a screen printing method. At this time, at the same time, the display electrode side alignment mark EAM is in the center of the display electrode in the pitch direction (in the present specification, the direction orthogonal to the line forming the stripe, the vertical direction is the extending direction of the line forming the stripe, the same applies hereinafter). Are printed near both ends of each (white circle in the figure). Then, by aligning the alignment mark BAM of the screen for printing a barrier rib (in the drawing, the cross overlaid on the alignment mark EAM on the display electrode side), the screen is aligned and the barrier rib is screen printed.

[0012]

However, as shown in FIG. 5, the width of the display electrode 32 is about 200 μm, and the barrier rib 33 having a width of about 100 μm is formed on the display electrode 32.
Must be overlaid and screen printed. If the barrier rib 33 deviates from the display electrode 32, discharge or unevenness in transmittance will be affected. Moreover, the pitch of the barrier ribs 33 is as narrow as about 0.69 mm at present.

However, in recent years, the area of plasma addressed display devices has become larger. Therefore, the screen also becomes larger, and the pitch deviation of the barrier ribs tends to occur,
It is an obstacle to production. The present invention has been made in view of the above circumstances, and in a plasma address display device capable of reducing the pitch deviation as much as possible when printing the display electrodes or the insulator in a stripe shape by screen printing, and corresponding to an increase in size. It is intended to provide a manufacturing method.

[0014]

In order to achieve the above object, a method of manufacturing a plasma addressed display device according to the present invention comprises:
A method for manufacturing a plasma addressed display device, in which a liquid crystal cell and a plasma cell are laminated via a dielectric sheet, wherein a stripe-shaped printing section to be screen-printed when an electrode or an insulator is printed in a stripe shape by screen printing. Is divided into two or more parts, and each divided printing part is screen-printed.

In this case, it is preferable to divide the striped printing portion in the stripe pitch direction. Also,
The striped print portion may be divided in the vertical direction of the stripe.

Further, when the stripe-shaped insulators are printed on the stripe-shaped electrodes by screen printing, the stripe-shaped insulator printed portions are divided in the pitch direction of the stripes, and each divided stripe-shaped insulator printed portion is divided. It is preferable to print each divided printing unit using a screen corresponding to.

[0017]

According to the method of manufacturing the plasma addressed display device of the present invention, the stripe-shaped printing portion to be screen-printed is divided into two or more portions, for example, divided into two or three in the stripe pitch direction, and each division is performed. The printing units screen print each.

That is, the conventional striped printing uses one screen, and the alignment is performed as shown in FIG.
It was done in the center of the print pattern. This is based on the assumption that the variations in the printing pitch are evenly displaced. However, in reality, the screens vary from one sheet to another depending on the tension of the screens at the time of manufacturing, and also due to the elongation of the screens at the time of printing. For this reason, when the screen became large, the pitch deviation more than expected occurred at both ends of the screen.

According to the present invention, a screen having a printing pattern obtained by dividing the screen printing conventionally performed with one screen into, for example, two or more parts in the pitch direction,
By printing, the pitch deviation can be accommodated in a divided small-area screen, and as a result, the pitch deviation can be effectively suppressed.

Further, the size of the screen requires an area four times as large as the print pattern. Therefore, although the supply of the screen to the print pattern having a large area is limited, it is possible to divide the print pattern. The size of the screen per sheet becomes smaller and there is no such limitation. In this respect as well, it is possible to cope with the increase in size of the plasma addressed display device.

[0021]

Embodiments of the present invention will be specifically described below with reference to the drawings. In this embodiment, the plasma addressed display device is the same as the above-mentioned conventional example, and detailed description of the structure is omitted. The feature of the present invention is that, as described above, when the electrode or the insulator is printed in a stripe shape by screen printing, the stripe-shaped printing portion to be screen-printed is divided into two or more portions, and each divided printing portion is divided. Are respectively screen-printed.

FIG. 1 is a schematic view showing a method for manufacturing a plasma addressed display device of the present invention, in which a barrier rib 33 is overcoated by a screen printing method on a striped display electrode 32 formed on a glass electrode 31 (see FIG. 3 (B)), the barrier rib printing pattern is equally divided into three in the pitch direction, and the first, second, and third screens for printing each divided pattern are produced, and screen printing is performed using each. The following is an example.

First, as shown in FIG. 1A, the striped display electrodes 32 are screen-printed, for example. At this time, the display electrode side alignment mark EAM is simultaneously printed. The alignment marks are formed on the display electrode printing screen so as to correspond to each of the divided first to third screens and to form a pair or more in the vicinity of both ends of the display electrode at the central portion in the pitch direction of the display electrode pattern. It is normal. The screen printing of the display electrodes is usually performed twice. Further, at the time of this display electrode printing, the pattern may be divided into two or more and screen printed.

Next, using the first screen S1, the block on the left side of the drawing among the three divisions of the barrier rib pattern is screen-printed. In this case, the alignment mark BAM is printed on the first screen in correspondence with the display electrode side alignment mark EAM, and the alignment of these alignment marks is performed by obtaining the center of gravity of both alignments using a CCD camera or the like. To do.

After printing using the first screen S1,
For example, in a drying process at about 150 ° C., the solvent is evaporated to dryness, and then, as shown in FIG. 1C, the central portion of the print pattern divided using the second screen S2 is screened in the same manner as above. Print. After the drying process, the print pattern on the right side of the drawing is printed on the third screen S3 as shown in FIG. 1 (D). As a result, the first printing of the barrier ribs is completed, and the first overcoating is repeated using the first to third screens.

After that, as shown in FIG. 3, after the barrier ribs having a predetermined height are obtained, firing is performed, and then the upper portions of the barrier ribs are polished to make the height of the barrier ribs equal to the predetermined height. Then, as shown in FIG. 3C, a frit seal 35 is formed around the plasma substrate glass 31 by a dispenser or the like, and the glass dielectric sheet 4 is placed on the barrier rib through the frit seal 35. Then, the gas is injected into the plasma chamber 34 formed by bonding to the plasma substrate glass.

Next, an alignment treatment (not shown) is performed, and the alignment shown in FIG.
As shown in FIG. 3D, spacers 24 for making the liquid crystal layer have a uniform thickness are dispersed, and as shown in FIG. The plasma addressed display device shown in FIG. 2 can be obtained by joining the sheet 4 to form a liquid crystal chamber and then injecting liquid crystal.

According to the method of manufacturing the plasma addressed display device of this example, since the printing pattern of the barrier rib is divided into three, the number of times of screen printing is tripled, but the manufacturing error of the screen at the time of manufacturing the screen printing plate is Since it is accommodated in a plate having a small area, pitch deviation can be effectively reduced, and inconveniences such as screen slack associated with a large screen printing plate can be eliminated. Moreover, even if the print pattern becomes large, the screen can be divided in accordance with it, so that it can be easily dealt with.

The method of manufacturing the plasma addressed display device of the present invention is not limited to the above embodiment. For example, the division may be in the vertical direction, and the number of divisions may be two or four or more, and may be variously changed without departing from the scope of the present invention.

[0030]

According to the method of manufacturing the plasma addressed display device of the present invention, it is possible to suppress the print displacement in the stripe-shaped printing of the electrodes and the insulator as much as possible.

[Brief description of drawings]

1A to 1D are schematic views showing a flowchart of a method for manufacturing a plasma addressed display device of the present invention.

FIG. 2 is a cross-sectional view showing an example of a plasma addressed display device.

3A to 3E are flowcharts showing a manufacturing process of the plasma addressed display device of FIG.

FIG. 4 is a schematic diagram illustrating the overlapping of display electrodes and barrier ribs.

FIG. 5 is a schematic view showing an example of dimensions of display electrodes and barrier ribs.

[Explanation of symbols]

2 Liquid Crystal Cell 3 Plasma Cell 4 Dielectric Sheet 21 Color Filter Substrate 22 Liquid Crystal Sealing Material 23 Liquid Crystal Layer 31 Plasma Substrate Glass 32 Display Electrode 33 Barrier Rib 34 Plasma Chamber 35 Frit Seal S1, S2, S3 First, Second, Third Screen EAM Display electrode side alignment mark BAM Barrier rib side alignment mark

Claims (4)

[Claims] 1. A method of manufacturing a plasma addressed display device, comprising a liquid crystal cell and a plasma cell laminated with a dielectric sheet interposed therebetween, which comprises screen printing when electrodes or insulators are printed in stripes by screen printing. A method for manufacturing a plasma addressed display device, characterized in that a stripe-shaped printing portion is divided into two or more portions, and each divided printing portion is screen-printed. 2. The method of manufacturing a plasma addressed display device according to claim 1, wherein the stripe-shaped printed portion is divided in a stripe pitch direction. 3. The method of manufacturing a plasma addressed display device according to claim 1, wherein the stripe-shaped printed portion is divided in a vertical direction of the stripe. 4. A stripe-shaped insulator printed portion is divided in the pitch direction of the stripe when the stripe-shaped insulator is screen-printed on the stripe-shaped electrode in an overlapping manner.
2. The method of manufacturing a plasma addressed display device according to claim 1, wherein each divided printing section is printed using a screen corresponding to each divided striped insulator printing section.