JPH03152830A - Gas discharging type panel - Google Patents

Abstract

PURPOSE:To obtain a panel for dot matrix display with a highly precise pitch excellent in crosstalk characteristic, discharge characteristic and mass- productivity by using a cell bulkhead in which a lattice dielectric body and a stripe dielectric body are superposed. CONSTITUTION:Between a front glass plate 1 having an anode 5 onto which a phosphor 7 is applied and a back glass plate 4 having a cathode 6, a lattice dielectric body 2 and a stripe dielectric body 3 are put. These are sealed as cell bulkheads by a low melting point glass flit followed by vacuum exhausting and sealing of gas to form a DC type gas discharge panel. In this constitution, the bulkhead formed of the dielectric body 2 suppress a reduction in display quality such as crosstalk between each dot or bleeding, and the bulkhead formed of the dielectric body 3 ensures the introduction of the gas to all the dots.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to AC type and DC type gas discharge type panels for performing dot matrix display, and more specifically relates to a grid-shaped dielectric material and a striped dielectric material. The present invention relates to a gas discharge type panel having cell partition walls formed by overlapping bodies.

[Prior Art] In general, A in which discharge cells are arranged in an X-Y matrix
In C-type and DC-type gas discharge panels (hereinafter abbreviated as PDP), in order to ensure a discharge gap,
or to prevent crosstalk to neighboring cells.
It requires a dielectric material called a partition wall.

When using the emission color of the rare gas itself, such as an FDP that emits orange emission color due to neon gas discharge, this partition wall is formed in a unidirectional stripe shape because the emission is limited only to the vicinity of the electrode of the selected cell. However, when considering multi-color or full-color PDPs, a method is adopted in which the phosphor is excited to emit light by ultraviolet rays associated with discharge, so in the case of unidirectional stripe-shaped partition walls, the direction along the partition wall is Leakage of ultraviolet rays may excite phosphors in adjacent cells to cause them to emit light. That is, crosstalk or color bleeding is unavoidable, which impairs color reproducibility and resolution, resulting in a decrease in the value of the display.

This problem can be solved by introducing lattice-shaped partition walls, but in general, FDPs are sandwiched between two sheets of glass with excellent flatness, and the surrounding area is sealed with sealing glass. When the lattice-shaped partition wall is used alone, each cell is completely separated by the partition wall, and there is no gap between the cells, resulting in that evacuation and gas introduction cannot reach all the cells. Therefore, it is necessary to secure the gas introduction hole by some method.

Up to now, lattice-shaped partition walls with gas introduction holes secured by various methods have been proposed. For example, there are the following:

Method A: Thick film method using multilayer printing of two patterns: a lattice shape and a lattice shape with notches (Television Science and Technology Journal, p. ay
~42, No. 15, VOj 12.191!11).

Method B: A method in which a photosensitive plate glass is etched to form lattice-shaped partition walls, and a single plate glass is further processed with grooves (N
HK Giken Monthly Report, p. 55-60, No. 2, Volume 88, 1
986).

Method C: A method in which a lattice-shaped dielectric is sandwiched between glass plates, using a spacer that is thicker than the dielectric to create a gap between the glass plates and the dielectric.

[Problems to be solved by the invention] Of these methods, method A uses thick film printing and is therefore inexpensive and excellent in mass production. Furthermore, the formation of a lattice shape requires extremely advanced technology. Furthermore, when considering alignment when stacking two patterns, the higher the resolution, the more precise the screen-making becomes, requiring more advanced technology.

In method B, grooves are formed in the glass plate as gas introduction holes, but it is difficult to mechanically form the grooves at a high-definition pitch, resulting in poor processability and problems in terms of cost.

Method C is a method that generally uses spacers outside the display area, and has little inconvenience for small displays, but as the size becomes larger, there is a problem that uneven discharge gaps occur due to warping of the glass substrate during the sealing process, etc. .

As described above, conventionally, no method has been found that has a high-definition pitch, is relatively inexpensive, and is excellent in mass production.

The present invention has been made to solve these problems, and is a gas discharge type that has a high-definition pitch, excellent characteristics such as crosstalk, is relatively inexpensive, can be mass-produced, and has a gas introduction hole. The purpose is to provide panels.

[Means for Solving the Problems] This object of the present invention is achieved by using a cell partition formed by overlapping a lattice-shaped dielectric material and a stripe-shaped dielectric material.

That is, the present invention provides AC type and DC type FDPs for performing dot matrix display, which are characterized by having cell partition walls formed by overlapping a grid-shaped dielectric material and a stripe-shaped dielectric material. be.

The lattice-shaped dielectric material in the present invention is obtained by thick film printing of glass paste, etching of photosensitive plate glass, drilling into plate glass, coating of glass on metal lattice plate, etc., and has excellent workability, panel assembly workability, The selection may be made in consideration of cost, adaptability to higher definition, etc. In the present invention, as a lattice-shaped dielectric material, 1 to
A lattice dielectric composite coated with a 108 μm dielectric is preferably used.

The lattice-shaped metal plate that is to be the base of this lattice-shaped dielectric composite is 42% by weight N1-6% by weight C"--Fe alloy,
Examples include 50% by weight NI-Fe alloy. The thickness of these metal plates is preferably about 0.05 to 1.0 mm. The coefficient of linear thermal expansion of this lattice metal plate is
It is desirable to match the linear thermal expansion coefficient of glass, and it is usually 80 to 100 (x lo-'/°C).

Methods for processing this metal plate into a predetermined grid pattern include punching using a press, laser processing,
Plating methods, welding methods, etching methods, etc. can be used, but
- The etching method is preferably used for boat fishing.

In this grid-like dielectric composition, 1
~100 μm of dielectric is deposited.

The dielectric material used here can be at least one selected from organic materials, crystalline inorganic materials, and glass. More specifically, glass or a crystalline inorganic material containing glass is generally used. To take a specific glass composition as an example, Pb 0-B203Si 0
2, Pb OB2O3, Zn 0-B203-3
i02 etc. are suitable. The softening point of these glasses is 40
The temperature is preferably 0 to 100° C., and the particle size of the glass is preferably about 1 to 5 μm.

In addition, as a crystalline inorganic substance, alumina (AJ203)
, forsterite (2Mg 0-8i 02 ) and other ceramics are used, and inorganic pigments (Fe 0
-Cr203, Co0-Al103, etc.) can also be used. The particle size of this crystalline inorganic material is 1 to 5μ.
About m is preferable.

Furthermore, any organic substance can be used as long as it can be finally turned into an inorganic substance.

As a method for forming the dielectric film on the lattice metal surface, at least one of the following methods can be used.

Namely, (1) a dipping method in which the dielectric powder is immersed in a liquid in which the dielectric powder is melted or a liquid in which the dielectric powder is dissolved or dispersed in water or an organic solvent; (2) a spray method in which the liquid is applied in the form of a spray; (3) A firing oxidation method in which the base metal is fired and oxidized in an appropriate atmosphere to form a metal oxide film on the surface; (4) An oxide film is created on the metal surface in an appropriate electrolyte using the base metal as an anode. (5) By dispersing dielectric powder in a liquid, dielectric particles are charged either positively or negatively. There is an electrodeposition method that attracts and precipitates particles (body particles) onto a metal surface.

Among these methods, the most advantageous method should be used, taking into account the uniformity of the coating, the thickness of the coating, the precision of controlling the coating conditions, the effect on the substrate, etc. (5) Using the electrodeposition method is the best.

In the present invention, gas introduction holes are created by providing a striped dielectric material on a glass plate.

The thickness of the striped dielectric is preferably 5 to 150 μm.

As a method for manufacturing this stripe-shaped dielectric material, at least one of the following methods can be used, for example.

In other words, (1) a method of arranging elongated glass plates at equal pitches, (2) a method of arranging elongated metal plates coated with glass at an equal pitch, and (3) a method of using glass paste as ink using a drawing device. (4) A method of forming a pattern by screen printing a glass paste; (5) A method of forming a pattern by printing a photosensitive glass paste, then exposing and developing it, etc. can be used.

Among these methods, the most advantageous one can be selected in consideration of processability, processing accuracy, cost, adaptability to high definition, etc. (4) Pattern formation using glass paste by screen printing (5) It is better to form a pattern by printing, exposing and developing a photosensitive glass paste.

(4) As a glass paste material used in the method of forming a pattern by screen printing, Teha, P.
b 0-B203-8l 02, Zn OB20
Glass components such as 3-8i 02 and AJ203 if necessary
Ceramics such as Fe0-Cr2O3, Co0-A
It is prepared by kneading 100 parts by volume of powder obtained by mixing and pulverizing pigments such as 1103 and the like with 10 to 30 parts by volume of vehicle.

Next, a striped dielectric pattern is obtained by screen printing. Although the film thickness that can be formed in one printing process varies depending on the screen plate making conditions, paste formulation, viscosity, etc., a thickness of approximately 5 to 30 μm can be obtained.

After printing once, dry it thoroughly in an oven and then print again. In this way, by repeating printing and drying many times, a dielectric material 0 having a desired thickness can be obtained. However, the film thickness after firing is about 70 to 100% of the film thickness after printing and drying through a firing process at 500 to 700°C.

In addition, the high definition pitch is 0.2m with current printing technology.
It has a high pitch and is highly adaptable to high definition.

Next is (5) the case of using a photosensitive glass paste, which can be used as a commercially available photo insulator (manufactured by Tokyo Ohka Kogyo ■).

Unlike ordinary glass paste, there is no need to form a pattern by screen printing, and it is sufficient to perform solid printing over the entire area where stripes are to be formed. However, since it is photosensitive, it must be handled under yellow light, but the printing technique is extremely simple.

After printing and drying, a pattern is formed through exposure and development steps, but if the film is too thick, the film is likely to peel off during development due to insufficient exposure. However, the minimum required film thickness for forming the gas introduction holes can be sufficiently obtained. Furthermore, the precision of the pitch is much higher than that of the screen printing method using the glass paste.

Regarding the proper use of normal glass paste and photosensitive glass paste, patterns are formed by screen printing with normal glass paste for pitches up to about 0-211111 pitch, and patterns with higher definition than 0.2m pitch are formed using normal glass paste. Since screen printing is technically difficult, patterns are formed by printing, exposing, and developing using a photosensitive glass paste, although this is disadvantageous in terms of cost.

[Operation of the Invention] When forming AC type and DC type FDPs for dot matrix display, the present invention uses a lattice-shaped dielectric material to suppress deterioration of display quality such as crosstalk between dots or color blurring. This problem is solved by using partition walls made of striped dielectric material to solve the problem of uncertain gas introduction to all dots.

1 2 [Example] Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example 1 A lattice-shaped dielectric material was prepared by the following method.

That is, 42% by weight N with a linear thermal expansion coefficient of 92 (X 10-'/'C) was used as the lattice-shaped metal to serve as the base.
A 1B weight % Cr-Fe alloy was used. Metal plate thickness is 0
．． The formed dot pitch was 0.21111% both vertically and horizontally, and the punch hole size was 0.15×O.

The dielectric material has a softening point of 600°C and an average particle size of 2 to 3.
Zn 0-B203-8 i 02 glass powder of μm and inorganic fillers such as Al103 and Fe 0-Cr203 were used. The dielectric was deposited in an electrodeposition solution using a lattice-shaped metal plate as an anode and a metal plate made of the same material and having a similar area as a cathode. The working voltage is 200 DC
v was set constant.

As a result, the electrodeposited state and the strength of the electrodeposited layer were also extremely good.

This sample was heated to the softening point of glass powder of 800°C in the air.
By firing at a higher temperature and shaping the dielectric layer into a dense film, a lattice-like dielectric composite with an electrodeposited layer thickness of 1Oμ was obtained.

For the stripe-shaped dielectric, a dielectric layer having a film thickness of 30 μm, a pitch of 0.2 ms, and a line width of 50 μm was formed on the back glass plate using a Fort Insulator (manufactured by Tokyo Ohka Kogyo Building).

Next, as shown in FIGS. 1 and 2, a lattice-shaped dielectric 2 and a striped dielectric 3 are sandwiched between the front glass plate 1 and the rear glass plate 4, and these serve as cell partition walls. After sealing with melting point glass frit, evacuation and gas filling through the chip tube, the chip tube was sealed off to create a DC type FDP. As shown in FIGS. 1 and 2, this DC type PDP has a front glass plate 1 provided with an anode 5.
Further, the inner surface of the front glass plate 1 is coated with a phosphor 7. On the other hand, a cathode 6 is provided on the back glass plate 4.

And, the anode 5 and the cathode 6 are orthogonal to each other. 4 It is designed to form a dot matrix.

In this way, the number of dots formed is 100 x 1.00 D
A C-type FDP was obtained. Note that the sealed gas is He-Xe
(2%) 300T orr was used.

Example 2 As the lattice-shaped dielectric, the same lattice-shaped dielectric composite as in Example 1 was used.

The striped dielectric material is ZnO-B203SI02
20 parts by volume of vehicle were kneaded with 100 parts by volume of mixed powder of glass components, Al1O,, and Fe0Cr203, and the pitch was 0.2 by screen printing.
#: A dielectric layer with a line width of 50 μm was formed. After three multilayer printings, a film thickness of 30 μl was obtained after firing.

Next, as in Example 1, seal with glass frit and D
A C-type FDP was created.

Example 3 A photosensitive plate glass was etched as a lattice-shaped dielectric, and the plate thickness was 0.1 mm5, and the dot pitch was 0 in both the vertical and horizontal directions.
．． 2#lII+% hole size is 0. +5X O,15
It was set as #llll1. This ultra-thin glass plate is extremely brittle<,F
Careful handling was required when assembling the DP.

As the striped dielectric, the same photo insulator as in Example 1 was used, with a film thickness of 30 μm and a pitch of 0.
．． A dielectric layer having a length of 2 m and a forming line width of 50 μm was formed.

Next, seal it with glass frit in the same way as in Example] and D
A C-type FDP was created.

Comparative Example 1 As the lattice-shaped dielectric, the same lattice-shaped dielectric composite as in Example 1 was used. This thickness was 0.1 mm.

Next, as a method for securing gas introduction holes, when sandwiching the above-mentioned lattice shape between two sheets of glass, a spacer that is slightly thicker than the lattice shape is placed outside the area of the lattice-shaped partition wall, so that the partition wall and the sheet glass A gap was formed between them. This spacer uses a frame-shaped plate glass that surrounds the lattice-shaped partition wall. Specifically, the plate glass frame is approximately 5 mm wide.
# and a thickness of 0.13 m were used.

5 6 Next, seal with glass frit as in Example 1 and
A C-type FDP was created.

Comparative Example 2 As the lattice-shaped dielectric, the same lattice-shaped dielectric composite as in Example 1 was used. This thickness is 0.1 m+.

Next, as a method for securing gas introduction holes, of the two glass plates sandwiching the lattice-like partition wall, only the back plate has a 0.2
Striped grooves with a pitch of m were formed. That is, a groove with a width of about 50 μm and a depth of about 30 μm was created near the center of the cell, so that gas could spread throughout the entire DC type FDP.

Grooving is performed in large numbers with extremely narrow widths and high-definition pitches, resulting in poor manufacturing yields and high costs, making it unsuitable for mass production.

Next, a lattice-like dielectric composite is sandwiched between the front plate and the grooved back plate and sealed with glass frit to form a DC shape F.
I created a DP.

Experimental Examples DC type PD obtained in Examples 1 to 3 and Comparative Examples 1 to 2
Regarding P, adaptability to high definition (dot pitch 0.
21 RIR), processability, uniformity of discharge voltage characteristics (unevenness of discharge gap), and crosstalk characteristics were evaluated, and the results are shown in Table 1. The evaluation symbols in Table 1 are as follows.

◎: Very good O: Slightly excellent Δ: Slightly poor ×: Poor In addition, the uniformity of discharge voltage characteristics was evaluated by the unevenness of the discharge gap at a driving voltage of 280V, and the crosstalk characteristics was evaluated based on the presence or absence of crosstalk to adjacent cells when every other cell on the top, bottom, left and right was selectively emitted.

7 8 No. 1 table

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the components and assembly of the PDP, and FIG. 2 is a cross-sectional view of the structure of one cell of the FDP. 1: Front glass plate, 2: Grid-shaped dielectric, 3: Varnish drive-shaped dielectric, 4: Rear glass plate, 5: Anode, 6: Cathode, 7: Phosphor. As shown in Table 1, Examples 1 to 3 obtained good results in all evaluation items, whereas Comparative Example 1 was inferior in uniformity of discharge voltage characteristics and crosstalk characteristics. Example 2 is inferior in adaptability to high definition and processability. [Effects of the Invention] As explained above, the FDP of the present invention, which has cell partition walls formed by overlapping a lattice-shaped dielectric material and a stripe-shaped dielectric material, has a high-definition pitch and excellent workability. It also has the effect of being excellent in uniformity of discharge voltage characteristics and crosstalk characteristics.

Claims (1)

[Claims] 1. AC type and DC type gas discharge type panels for dot matrix display, characterized by having cell partition walls formed by overlapping a grid-shaped dielectric material and a stripe-shaped dielectric material . 2. The lattice-shaped dielectric is placed on the surface of the lattice-shaped metal plate.
2. A gas discharge panel according to claim 1, which is a grid-like dielectric composite coated with a dielectric of ~100 [mu]m. 3. The stripe-shaped dielectric material is patterned by screen printing a glass paste or by printing and developing a photosensitive glass paste, and has a film thickness of 5 to 150 μm. gas discharge type panel.