JPH08304794A - Plasma address display device and its manufacture - Google Patents

Abstract

PURPOSE: To provide the device which has high strength and toughness and can easily be handled and also to provide the manufacturing method of the device. CONSTITUTION: In this manufacture, the first sealing section in the peripheral part of a dielectric sheet 3 which is opposite to a plasma glass 21 through electrodes 22 and barrier ribs 23 and by which plasma sections 2 are formed, is coated with a sealant 44 for a liquid crystal and the sealant 44 is cured to join the dielectric sheet 3 and a color filter 41 together. A liquid crystal chamber 48 is formed between the dielectric sheet 3 and color filter 41 through using the sealant 44 as the side wall. Also, the second sealing section in the edge part of the dielectric sheet 3, located on the outside of the first sealing section, is coated with a reinforcing sealant 6 and the sealant 6 is cured to firmly join the plasma glass 21, dielectric sheet 3 and color filter 41 to each other. The second sealing section is not allowed to contact with the liquid crystal since it is located on the outside of the first sealing section and accordingly, the firm joining of these components 21, 3 and 41 of the device can be performed by using the reinforcing sealant 6 selected mainly on account of its high adhesion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma address display device constructed by laminating an electro-optic cell and a plasma cell, and a method for manufacturing the same.

[0002]

2. Description of the Related Art As a flat panel display device, a liquid crystal display (Li
A quid crystal display (LCD) is widely known.
In particular, a TFT type LCD in which a thin film transistor (TFT) is provided as an active element for each pixel is rapidly spreading as a device capable of increasing the response speed and increasing the contrast. However, in such a display device, since an active element such as a TFT has to be formed for each pixel, there is a problem that a sufficient yield cannot be obtained at the time of manufacturing. Especially, in a large area display, the problem becomes remarkable.

Therefore, there has been proposed a plasma address display device which drives an electro-optical cell by utilizing plasma discharge instead of a switching element such as a TFT. The plasma address display device will be described with reference to FIGS.

First, the structure of the plasma addressed display device will be described with reference to FIG. FIG. 5 is a diagram showing the structure of the plasma addressed display device 1. The plasma addressed display device 1 has a plasma part 2 and a liquid crystal part 4 laminated on the plasma part 2 with a dielectric sheet 3 interposed therebetween.

In the plasma part 2, the dielectric sheet 3 is provided so as to face the plasma glass 21 at a predetermined interval via a partition wall formed on the plasma glass 21, and the plasma glass is partitioned by the partition wall. Each space between 21 and the dielectric sheet 3 forms a plasma chamber 24.
The partition walls are provided on the plasma glass 21 in parallel at predetermined intervals in the row direction. Therefore, the plasma chamber 2
4 are arranged in parallel in the row direction and extend in the column direction. The partition wall is a strip-shaped electrode 22 formed on the plasma glass 21 in parallel with the row direction, and has a width slightly narrower than the electrode 22, that is, both sides of the electrode 22 are exposed on the electrode 22. The barrier rib 23 is formed by laminating insulating ceramics. Also,
The plasma chamber 24 is filled with an ionizable gas such as helium.

In the liquid crystal part 4, a color filter 41 is further bonded on the dielectric sheet 3 constituting the upper surface of the plasma part 2 so as to maintain a predetermined distance, and the space between the dielectric sheet 3 and the color filter 41. The space is filled with liquid crystal to form the liquid crystal layer 43. On the surface of the color filter 41 on the side of the dielectric sheet 3, band-shaped data electrodes 42 whose longitudinal direction is the row direction are formed in parallel at predetermined intervals in the column direction. Thus, in the plasma addressed display device 1, the plasma chamber 24 of the plasma unit 2 and the liquid crystal unit 4 are
Data electrodes 42 are orthogonal to each other, and the intersections of these data electrodes 42 define each pixel of the plasma addressed display device 1.

FIG. 5 is a diagram schematically showing the structure of the plasma addressed display device 1 for easy understanding, and the dimensions such as the thickness and size of each part and each layer, and their ratios. Not shown. Their actual size is illustrated in FIG. FIG. 6 is a diagram showing an example of the actual size of each part of the plasma addressed display device 1. As shown in FIG. 6, in the plasma addressed display device 1, the plasma glass 21 and the color filter 41 are relatively thick members having a thickness of about 1 mm to 2 mm. On the other hand, the dielectric sheet 3 is a thin member of 50 μm, and the liquid crystal layer 43 is a very thin layer of 7 μm.

Next, the operation of the plasma addressed display device 1 will be described. The plurality of strip-shaped electrodes 22 formed on the plasma glass 21 are alternately arranged as the anode electrodes 22.
A and a cathode electrode 22K are connected to a drive circuit (not shown) so as to become the cathode electrode 22K. The drive circuit causes the anode electrode 22
When a predetermined voltage is applied between A and the cathode electrode 22K, the gas in the plasma chamber 24 is ionized to generate plasma discharge, and the inside thereof is maintained at substantially the anode potential. At this time, when a data voltage is applied to the data electrode 42 on the plasma chamber 24, the data voltage is written to the liquid crystal layer 43 between the plasma chamber 24 and the data electrode 42 via the dielectric sheet 3. After that, when the plasma discharge ends, the plasma chamber 24 becomes a floating potential, and the voltage written in the liquid crystal layer 43 of the corresponding pixel is held as it is.

Therefore, a predetermined voltage is sequentially applied to the plasma chambers 24 arranged parallel to the row direction, and when the plasma chambers 24 of each row are active, the data in the column direction corresponding to the row is applied to the data electrode 42. As a result, a two-dimensional image can be displayed.

Next, a method of manufacturing the plasma addressed display device 1 will be described with reference to FIG. FIG. 7 is a diagram showing each step in manufacturing the plasma addressed display device 1. First, as shown in FIG. 7A, the electrodes 22 are formed on the plasma glass 21 by screen printing in a strip shape to form the electrodes 22. Next, as shown in FIG. 7B, the barrier ribs 23 are similarly laminated on the strip-shaped electrodes 22 by screen printing. Since the barrier ribs 23 are partition walls that form the plasma chamber 24 and require a height of about 200 μm, this screen printing is repeated until the height of the barrier ribs 23 becomes a predetermined height or more.
When the barrier ribs 23 have a height equal to or higher than a predetermined height, firing is performed to complete the formation of the barrier ribs 23.

After the formation of the barrier ribs 23 is completed, FIG.
As shown in (C), thin glass as the dielectric sheet 3 is bonded onto the barrier ribs 23. In that case, first, the surface of the barrier rib 23 is polished to be flat. Then, the frit seal 25 is attached to the peripheral edge of the plasma glass 21.
Is applied using a dispenser, and this frit seal 25
The dielectric sheet 3 to the electrodes 22 and the barrier ribs 2.
It joins so that it may face plasma glass 21 via 3 and. As a result, the plasma glass 21, the dielectric sheet 3,
A plasma chamber 24 surrounded by the electrode 22 and the barrier rib 23 is formed, and a gas is injected into the plasma chamber 24 to form the plasma portion 2.

Next, as shown in FIG. 7D, gap spacers 45 for securing a gap between the liquid crystal layers are dispersed,
Further, a liquid crystal sealing material 44 for joining the color filter 41 is applied to the peripheral edge of the dielectric sheet 3 by a dispenser. As the liquid crystal sealing material 44, an ultraviolet curing sealing material that is cured by irradiation with ultraviolet rays is used. Next, on the dielectric sheet 3 coated with the liquid crystal sealing material 44, as shown in FIG.
1 is piled up and the color filter 41 and the dielectric sheet 3 are joined by the liquid crystal sealing material 44. As a result, the gap spacer 45 is provided between the color filter 41 and the dielectric sheet 3.
Thus, the liquid crystal chamber 48 with a predetermined space is formed.

Finally, the liquid crystal chamber 48 is filled with the liquid crystal 9 to form the liquid crystal layer 43. In addition, in the injection of this liquid crystal,
When an attempt is made to inject liquid crystal in a vacuum chamber like a normal liquid crystal display device, the dielectric sheet 3 will be broken in the vacuum chamber. Therefore, a liquid crystal injection port is provided in the color filter 41, and liquid crystal is injected from there. That is, two openings are provided in the color filter 41, one opening serves as a liquid crystal inlet, and the other opening serves as an exhaust opening. Then, while the liquid crystal is injected by bringing the liquid crystal injection port into contact with the injection port of the tank containing the liquid crystal, the inside of the liquid crystal chamber 48 is evacuated from the exhaust port. As a result, the liquid crystal 9 is gradually injected into the liquid crystal chamber 48.

The plasma addressed display device 1 is manufactured in this manner.

[0015]

However, in such a plasma addressed display device, a color filter as a liquid crystal substrate is directly bonded to a dielectric sheet which is a very thin glass plate having a thickness of about 50 μm. . Therefore, if a certain amount of force is applied to the color filter, the dielectric sheet will be damaged. That is, the strength of the plasma addressed display device was not sufficient. Therefore, the plasma address display device is often damaged during work such as TAB mounting of the circuit, transportation, and attachment to the device, and it requires great care in its handling, resulting in inefficient production.

Therefore, an object of the present invention is to provide a plasma addressed display device which is strong, that is, strong and easy to handle. Another object of the present invention is to manufacture a plasma-addressed display device which has high strength, that is, is durable and can be easily handled, and as a result, a plasma-addressed display device can be efficiently manufactured. To provide a method.

[0017]

In order to solve the above-mentioned problems, a seal portion for joining liquid crystal substrates has a double structure,
A first seal portion whose main purpose is to seal liquid crystal, and a second seal portion whose main purpose is to firmly bond each substrate.
The respective substrates were joined by the seal portion of 1 to form a plasma addressed display device.

Therefore, in the plasma addressed display device of the present invention, the plasma substrate and the dielectric sheet are bonded at a predetermined interval and a plasma portion is formed therebetween, and the dielectric sheet and the liquid crystal substrate are bonded at a predetermined interval between them. A plasma addressed display device in which a liquid crystal part is formed, wherein the dielectric sheet and the liquid crystal substrate are bonded to each other by a first sealant at a first seal part at a peripheral edge of the dielectric sheet. In the second seal portion at the edge portion of the dielectric sheet outside the seal portion, the plasma substrate, the dielectric sheet, and the liquid crystal substrate are joined by a second sealant.

Preferably, the first sealant is a sealant which has little influence on liquid crystals, and the second sealant is a sealant having a sufficiently high adhesive strength.

Further, preferably, the second seal portion has one or more openings for connecting the inside and the outside of the second seal portion so as to allow ventilation.

Also, in the method of manufacturing the plasma addressed display device of the present invention, the plasma substrate and the dielectric sheet are bonded at a predetermined interval to form a plasma chamber therebetween, and a plasma chamber is formed on the peripheral portion of the dielectric sheet with respect to the liquid crystal. A first sealant having a small influence on the dielectric sheet of the plasma substrate, and a second sealant having a stronger adhesive strength than at least the first sealant is applied to the edge portion of the dielectric sheet at least at one or more break portions. Coating so that the dielectric sheet and the liquid crystal substrate are overlapped so that a liquid crystal chamber of a predetermined height is formed between them.
The first sealant is hardened to bond the dielectric sheet and the liquid crystal substrate, the second sealant is hardened to bond the plasma substrate, the dielectric sheet and the liquid crystal substrate to the liquid crystal chamber. Liquid crystal is filled to form a liquid crystal layer.

[0022]

In the manufacturing apparatus of the plasma addressed display device of the present invention, the first sealant is applied to the first seal portion at the peripheral edge of the dielectric sheet, and the outer side of the first seal portion is applied. A second sealant is applied to the second seal portion at the edge of the dielectric sheet and cured to bond the plasma substrate, the dielectric sheet, and the liquid crystal substrate. At this time, the first sealant bonds the dielectric sheet and the liquid crystal substrate, and the first sealant serves as a wall to form a liquid crystal chamber. The second sealant bonds the plasma substrate, the dielectric sheet, and the liquid crystal substrate, and in particular, directly and firmly bonds the liquid crystal substrate to the plasma substrate.

Further, in the method of manufacturing the plasma addressed display device of the present invention, first, the plasma substrate and the dielectric sheet are bonded at a predetermined interval to form a plasma chamber therebetween. Next, a first sealant is applied to the peripheral edge of the dielectric sheet, and a second sealant is applied to the edge of the dielectric sheet of the plasma substrate. The body sheet is overlaid so that a liquid crystal chamber having a predetermined height is formed therebetween. Then, the first sealant is cured, the dielectric sheet and the liquid crystal substrate are bonded, and a liquid crystal chamber having the first sealant as a side wall is formed.
At the same time, the second sealant is also cured to bond the liquid crystal substrate to the plasma substrate and the dielectric sheet.
Since the first sealant forms the wall of the liquid crystal chamber, a sealant that has little influence on the liquid crystal is used. Further, as the second sealant, it is not necessary to consider the influence on the liquid crystal, and a sealant having high adhesive strength is used. Finally, the liquid crystal chamber is filled with liquid crystal to form a liquid crystal layer.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the plasma addressed display device of the present invention will be described. The structure of the plasma addressed display device to be manufactured is almost the same as the structure of the plasma addressed display device 1 described above with reference to FIGS.
In the present embodiment, the same components as the respective components will be described using the same reference numerals.

First, the structure of the plasma addressed display device will be described with reference to FIGS. FIG. 1 is a side view showing the structure of the plasma addressed display device 1.
FIG. 2 is a view showing the arrangement of the seal portion of the plasma addressed display device 1, and is a top view having a cross section AA of FIG. 1.

The plasma address display device 1 has a plasma part 2 and a liquid crystal part 4 laminated on the plasma part 2 with a dielectric sheet 3 interposed therebetween.

In the plasma part 2, the dielectric sheet 3 is joined to the plasma glass 21 so as to face the plasma glass 21 at a predetermined interval via a partition wall formed on the plasma glass 21, and each space partitioned by the partition wall. Form a plasma chamber 24. The plasma glass 21 and the dielectric sheet 3 are joined by a frit seal 25. Frit seal 2
As shown in FIG. 2, the reference numeral 5 is formed continuously over the entire outside of the effective screen area 8 to seal the plasma chamber 24 and join the plasma glass 21 and the dielectric sheet 3 together.

The partition walls are strip-shaped electrodes 22 formed in parallel on the plasma glass 21 in the row direction, and a slightly narrower width than the electrodes 22, that is, both sides of the electrodes 22 are exposed on the electrodes 22. In this state, the barrier ribs 23 are formed by laminating insulating ceramics. An ionizable gas such as helium is sealed in the plasma chamber 24, and plasma discharge is performed by the electrode 22.

In the liquid crystal part 4, a color filter 41 is further bonded on the dielectric sheet 3 constituting the upper surface of the plasma part 2 so as to maintain a predetermined space, and the space between the dielectric sheet 3 and the color filter 41. The space is filled with liquid crystal to form the liquid crystal layer 43. The dielectric sheet 3 and the color filter 41 are joined by a liquid crystal sealing material 44 continuously applied to the entire outside of the effective screen area 8 like the frit seal 25. The liquid crystal sealing material 44 joins the dielectric sheet 3 and the color filter 41 and forms the side wall of the liquid crystal chamber 48. Therefore, as the material of the liquid crystal sealant 44, a sealant that does not affect the liquid crystal characteristics and has few impurity ions is used. In this embodiment, an acrylic epoxy sealant that is cured by ultraviolet rays and heat is used.

In the plasma addressed display device 1 of this embodiment, the reinforcing seal 6 is provided further outside the frit seal 25 and the liquid crystal seal material 44 in order to firmly connect the plasma part 2 and the liquid crystal part 4. Has been.
The reinforcing seal 6 is interposed between the plasma glass 21 and the color filter 41 along the edge of the dielectric sheet 3 so as to cover the edge of the dielectric sheet 3, whereby the plasma glass 21, the dielectric sheet 3, and the , Color filter 4
1 is firmly adhered.

The reinforcing seal 6 is, as shown in FIG.
It is formed in a broken line shape along the edge of the dielectric sheet 3. This is to prevent air from remaining inside the reinforcing seal 6 when the atmosphere around the plasma addressed display device 1 is evacuated in the manufacturing process of the plasma addressed display device 1. Since the reinforcing seal 6 is not exposed to liquid crystal or other gas, it is possible to use any sealing agent having a strong adhesive force. In this embodiment, an acrylic UV curable resin is used.

The partition walls of the plasma section 2 are provided on the plasma glass 21 in parallel in the row direction at predetermined intervals. Therefore, the plasma chambers 24 are arranged in parallel in the row direction and extend in the column direction. In addition, the color filter 4
On the surface of the first dielectric sheet 3 side, strip-shaped data electrodes (not shown) whose longitudinal direction is the row direction are formed in parallel at predetermined intervals in the column direction. As described above, the plasma chamber 24 and the data electrode of the liquid crystal section 4 are orthogonal to each other, and each intersection of these defines the pixel of the plasma addressed display device 1.

Next, a method of manufacturing the plasma addressed display device 1 will be described with reference to FIGS.
FIG. 3 is a diagram showing a manufacturing process of the plasma addressed display device 1, and FIG. 4 is a diagram for explaining each process of FIG.

First, as shown in FIG. 4A, the electrodes 22 are printed on the plasma glass 21 in a strip shape by screen printing to form the electrodes 22 (step S1). Next, FIG.
As shown in (B), on the electrode 22 formed in a strip shape,
Similarly, the barrier ribs 23 are laminated by screen printing. The barrier rib 23 is a partition wall that forms the plasma chamber 24.
Since a height of about 00 μm is required, this screen printing is repeatedly performed until the height of the barrier rib 23 becomes equal to or higher than a predetermined height. When the barrier ribs 23 have a height equal to or higher than a predetermined height, firing is performed to complete the formation of the barrier ribs 23 (step S2).

When the formation of the barrier ribs 23 is completed, FIG.
As shown in (C), thin glass as the dielectric sheet 3 is bonded onto the barrier ribs 23. In that case, first, the surface of the barrier rib 23 is polished to be flat. Then, the frit seal 25 is attached to the peripheral edge of the plasma glass 21.
Is applied using a dispenser, and this frit seal 25
The dielectric sheet 3 to the electrodes 22 and the barrier ribs 2.
It joins so that it may face plasma glass 21 via 3 and. As a result, the plasma glass 21, the dielectric sheet 3,
A plasma chamber 24 surrounded by the electrodes 22 and the barrier ribs 23 is formed, and a gas is injected into the plasma chamber 24 to form the plasma part 2 (step S3).

Next, as shown in FIG. 4D, a gap spacer 45 for securing a gap between the liquid crystal layers is scattered on the upper surface of the dielectric sheet 3 bonded to the plasma glass 21, and the color A reinforcing seal 6 for firmly bonding the color filter 41 to the plasma glass 21 and the dielectric sheet 3 with the liquid crystal sealing material 44 for joining the filter 41 and forming the liquid crystal chamber 48 at the periphery of the dielectric sheet 3. Is applied onto the plasma glass 21 by a dispenser (step S4).

Then, as shown in FIG. 4E, a color filter 41 is overlaid on the liquid crystal sealing material 44 and the plasma portion coated with the reinforcing seal 6, and the color filter 41, the dielectric sheet 3, and The color filter 41, the dielectric sheet 3 and the plasma glass 21 are bonded together. As a result, a liquid crystal chamber 48 is formed between the color filter 41 and the dielectric sheet 3 with a gap provided by the gap spacer 45 (step S5). Finally, the liquid crystal chamber 48 is filled with the liquid crystal 9 to form the liquid crystal layer 43 (step S6).

As described above, in the plasma addressed display device 1 of the present embodiment, when the color filter 41 forming the liquid crystal part 4 is bonded to the plasma part 2, the liquid crystal sealing material 44 between the color filter 41 and the dielectric sheet 3 is formed. Instead of adhering only by itself, the plasma glass 21 is also adhered by a reinforcing seal 6 which can be strongly adhered directly. Therefore, even if a certain amount of force is applied to the color filter 41, the force is not transmitted only to the dielectric sheet 3, and damage to the dielectric sheet 3 can be prevented. Further, in the plasma addressed display device 1 of the present embodiment, the liquid crystal sealing material 44 may be a sealing material that attaches importance to adhesiveness, and the reinforcing seal 6 may be a sealing material that attaches importance to adhesive strength. Therefore, a high quality and durable plasma addressed display device can be provided. Further, since the plasma address display device is durable, it is easy to handle and can be efficiently manufactured.

The present invention is not limited to this embodiment, but various modifications can be made. For example, the configuration of the plasma address display device is not limited to this embodiment. The present invention can be applied to any other structure of the plasma address display device as long as the liquid crystal chamber is formed by laminating a predetermined substrate on the plasma substrate. is there. Further, the application form of the reinforcing seal is not limited to the two-dot chain line like the present embodiment, and may be applied in any form. In addition, the material of the sealing material,
As for the curing method, any material and method may be used.

[0040]

According to the present invention, it is possible to provide a plasma address display device which has high strength, that is, is strong and easy to handle. Further, it is possible to provide a method of manufacturing a plasma addressed display device capable of efficiently producing such a tough and easily handled plasma addressed display device.

[Brief description of drawings]

FIG. 1 is a side view showing a structure of a plasma addressed display device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an arrangement of a seal portion of the plasma addressed display device shown in FIG. 1, and is a top view having a cross section AA of FIG.

3 is a flowchart showing manufacturing steps of the plasma addressed display device shown in FIG. 1. FIG.

FIG. 4 is a diagram for explaining each step of the manufacturing process shown in FIG.

FIG. 5 is a diagram showing a structure of a plasma addressed display device.

FIG. 6 is a diagram illustrating the dimensions of each part of the plasma addressed display device shown in FIG.

7A to 7C are diagrams showing each manufacturing process of the plasma addressed display device shown in FIG. 5, FIG. 7A being a diagram showing an electrode forming process, FIG. 7B being a diagram showing a barrier rib forming process, and FIG. FIG. 4A is a diagram showing a thin glass bonding process, FIG. 4D is a liquid crystal sealing material coating process, FIG. 6E is a color filter bonding process, and FIG. 4F is a liquid crystal filling process. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Plasma address display device 2 ... Plasma part 21 ... Plasma glass 22 ... Electrode 23 ... Barrier rib 24 ... Plasma chamber 25 ... Frit seal 3 ... Dielectric sheet 4 ... Liquid crystal part 41 ... Color filter 43 ... Liquid crystal layer 44 ... Liquid crystal seal 45 ... Gap spacer 48 ... Liquid crystal chamber 6 ... Reinforcement seal 9 ... Liquid crystal

Claims (5)

[Claims] 1. A plasma address display in which a plasma substrate and a dielectric sheet are bonded at a predetermined interval and a plasma portion is formed therebetween, and the dielectric sheet and a liquid crystal substrate are bonded at a predetermined interval and a liquid crystal portion is formed therebetween. A device, wherein in the first seal portion on the peripheral portion of the dielectric sheet,
The dielectric sheet and the liquid crystal substrate are joined together by a first sealant, and the plasma is formed by a second sealant at a second seal portion at an edge portion of the dielectric sheet outside the first seal portion. A plasma addressed display device comprising a substrate, the dielectric sheet and the liquid crystal substrate bonded together. 2. The plasma address display device according to claim 1, wherein the first sealant is a sealant having a small influence on liquid crystal, and the second sealant is a sealant having a sufficiently high adhesive strength. apparatus. 3. The plasma address display device according to claim 1, wherein the second seal portion has one or more opening portions that connect the inside and the outside of the second seal portion so as to allow ventilation. . 4. The plasma address display device according to claim 2, wherein the second seal portion has one or more openings for connecting the inside and the outside of the second seal portion so as to allow ventilation. . 5. A plasma substrate and a dielectric sheet are joined at a predetermined interval to form a plasma chamber therebetween, and a first sealing agent having a small influence on liquid crystal is applied to the peripheral edge of the dielectric sheet. A second sealant having a higher adhesive strength than that of the first sealant is applied to an edge portion of the dielectric sheet of the plasma substrate so as to have at least one breakage portion, and the dielectric sheet and the liquid crystal. The substrates are stacked so that a liquid crystal chamber having a predetermined height is formed therebetween, the first sealing agent is cured, the dielectric sheet and the liquid crystal substrate are bonded, and the second sealing agent is cured. A method of manufacturing a plasma addressed display device, comprising bonding the plasma substrate, the dielectric sheet and the liquid crystal substrate, and filling the liquid crystal chamber with liquid crystal to form a liquid crystal layer.