JPH0320932A - Plasma display panel - Google Patents

Abstract

PURPOSE:To obtain a high yield at a low cost by arranging holes at positions corresponding to individual picture elements on the face of the discharge gas spaces side of the second insulating substrate, coating phosphors on the inner faces of these holes, and bringing walls between holes into contact with the first insulating substrate. CONSTITUTION:Holes are arranged at positions corresponding to individual picture elements on the face of the discharge gas spaces 8 side of the second insulating substrate 2, phosphors 10 are coated on the inner faces of these holes, and walls 9 between holes are kept in contact with the first insulating substrate 1. Blind holes are bored on a front glass by etching or the like, these holes are used for discharge gas spaces 8, and the walls 9 between holes are used for cell barriers. Cell barriers are not required to be manufactured by duplex printing, and the panel production process is simplified.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to the use of dots used in personal convenience stores, office desks, and wall-mounted televisions that are expected to develop in the future. This invention relates to the structure of a matrix type color plasma display.

[Conventional technology]

An example of a conventional color plasma display panel is one with the structure shown in Figure 6 (SID).
88●Digest●of●Technical Papers 1
42 pages (SID 88 Digest of Techn.
ical Papers, P. 142) ). In FIG. 6, 21 is a rear glass plate, 22 is a front glass plate, 23 is an auxiliary anode, 24 is a display anode, 25 is a base electrode,
26 is a cathode laminated on the base electrode 25, 27 is a display cell, 28 is a cell barrier separating each display cell, and 29 is a phosphor film coated on the front glass plate 22.

A scanning pulse voltage is applied to the selected cathode 26.

A DC voltage is applied to the auxiliary anode 23, and an auxiliary discharge is generated between it and the selected cathode 26. One side display anode 2
A pulse voltage is applied to 4 in response to the light emission of the display cell 27. In the display cell 27 that should emit light, a discharge occurs due to the auxiliary discharge, and the ultraviolet light from the discharge causes the phosphor 29 to emit light.
is stimulated, producing visible luminescence.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, a cell barrier is used to fix the display cell and maintain a suitable distance between the back glass and the front glass to obtain a discharge space for the display cell. This cell barrier is produced using the so-called screen printing method, but if the width of the cell barrier is selected to a certain value, there is a limit to the height of the cell barrier that can be obtained with one printing, so it is difficult to produce high-definition panels. If a cell barrier with a required narrow width and high height is to be produced, it is necessary to perform multiple coatings b to form the cell barrier. However, if multiple coats are applied, the manufacturing cost will increase. When performing overcoating, it is necessary to match A1, and the dimensional accuracy deteriorates due to color matching errors, reducing the yield rate B for the panel manufacturing process. There was a drawback that the cathode surface could be damaged.

[Means to solve the problem]

According to the present invention, there is provided a discharge gas space and two insulating substrates placed in parallel so as to sandwich the discharge gas space, and on the surface of the first insulating substrate facing the discharge gas space, striped rows are formed. electrodes, and striped row electrodes that are electrically insulated from the column electrodes and arranged in a direction perpendicular to the column electrodes. A plasma display panel is obtained in which the holes are arranged at corresponding positions, the inner surfaces of the holes are coated with phosphor, and the walls between the holes are in contact with the first insulating substrate.

[Effect]

The present invention solves the problems of the prior art by using the above-described configuration. That is, conventionally, a cell barrier was formed on the back glass, but in the present invention, a part of the front glass is used as the cell barrier. That is, a blind hole b is formed by etching or the like in the front glass, this hole is used as a discharge gas space, and the wall between the holes is used as a cell barrier. Therefore, there is no need to fabricate cell barriers by multiple printing as in the past, the panel manufacturing process is simple, costs can be kept low, and the manufacturing yield b is increased.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a plan view of one embodiment of the present invention, and FIG. 1B is a sectional view taken along line a-a' in FIG. 1A. 1
is a first insulating substrate made of glass with a thickness of 2-2, a second insulating substrate made of soda glass with a thickness of 2-ply, and 3 is printed with a thick film of silver on the surface of the first insulating substrate. The fabricated thickness is approximately 10
Column electrodes 4 and 14 with a width of 100 microns and a width of about 10
The row electrode 5 has a width of 100 microns and has a thickness of about 20 microns obtained by annealing a low-melting glass. layer 6 insulates the upper part of the row electrode 4 from the discharge gas space 9,
A second glass plate obtained by firing a low melting point glass with a thickness of about 20 μm.
A MgO film 8 having a thickness of s o o of obtained by vacuum evaporation and protecting the surface of the insulating layer 60 from discharge gas, 8 is a 300 micron square hole with a depth of 200 mm.
A discharge gas space in the form of a square blind hole of microns, reference numeral 9 indicates a wall of 100 microns in thickness and 200 microns in height between the holes drilled in the second insulating substrate 2, which is the discharge gas space 8; is a phosphor.

To make a hole in the second insulating substrate 2, a well-known photolithography method is used to first leave a resist part in the same pattern as the wall on a flat glass substrate, and then to etch the glass substrate using hydrochloric acid. method was used. By using this method, the discharge cells can be easily partitioned without damaging the MgO film 7 on the first insulating substrate b1, and the discharge gas space between the first insulating substrate b1 and the second insulating substrate 2. It was possible to obtain a wall 9 that holds 8. In this case, photolithography 27
Since the hole positions are determined by the A method, the error in wall position can be reduced to 1/5 or less compared to the thick film printing method, and is therefore particularly advantageous when producing large-area panels.

Here, we have described a method of etching ordinary soda glass using the 7F lithography method. It is also possible to perform hole machining.

Even when the sand illustration method was used to make holes in the second insulating substrate 2, good results were obtained.

In this case, similar to the etching method using fluoric acid,
A photoresist pattern identical to that of the wall is formed on a flat glass substrate using the well-known photolithography method. Next, apply sandblasting to the glass substrate.
The hole was shaped by spraying an abrasive such as carborundum or Si (h) powder and cutting the hole.In this case, the hole position was determined by the photolithography method, The second insulating substrate 2 could be obtained by processing the glass substrate over a large area with high precision.

Next, a second embodiment of the present invention is shown in FIG. As in the case of FIG. 1, FIG. 2A is a plan view, and FIG. 2B is a sectional view. In FIG. 2, one row electrode 4 is provided for each pixel, which is different from FIG. 1, and so-called sustaining discharge is performed between the row electrode 4 and column electrode 3.

The rest is the same as the embodiment shown in FIG. This example is
Since the number of row electrodes is half that of the first embodiment, it is advantageous in achieving high definition.

A third embodiment of the present invention is shown in FIG. 3 (FIG. 3A is a plan view and FIG. 3B is a sectional view). In Fig. 3, different row electrodes from Fig. 1 are formed across pixels (discharge gas space) on both sides, and the row electrode of one row is a common electrode for the pixels of two rows. It has become.

The rest is the same as the previous embodiment. In this case as well, the number of row electrodes is half that of the first embodiment, which is advantageous for achieving high definition. 1. In the structure of this embodiment, when the width of the wall 90 becomes larger than the designed value, the area where the row electrode 4 contributes to discharge is blocked by the portion where the wall 9 contacts the MgO film 7, and the discharge characteristics vary. do. In particular, when the width of the wall 9 becomes extremely large to the designed value, the entire surface of the row electrode 4 covers the wall 9 with MgO! There is also a risk that the part where it touches 7 will be squeezed and the casing will stop discharging. When the wall 9 is manufactured by the screen printing method, there is a sufficient risk of this, but according to this embodiment, the position of the wall 9 and the width of the portion of the wall 9 in contact with the MgO film 7 are adjusted to the design values. Therefore, a panel can be obtained in which the area where the row electrodes 4 contribute to the discharge is constant and the discharge of each pixel is uniform over the entire panel. Therefore, since the luminance of each pixel is also constant, a display panel with extremely high display quality can be obtained.

A sectional view of the fourth embodiment is shown in FIG. The plan view is omitted because it is the same as FIG. 3A.

In FIG. 4, the second insulating substrate 2 contains an alkaline component! A low-melting point glass is baked flat on the hard glass to the height of the wall 9, and then the low-melting point glass portion is etched using the photolithography method described in the first embodiment. The wall becomes like low melting point glass 9
was formed. In this case, since the etching rate of hard glass with boiling acid is sufficiently slower than the etching rate of low melting point glass with boiling acid, etching substantially stops only at the low melting point glass portion. Therefore, the height of the wall 9 can be easily adjusted, which is very advantageous in manufacturing. Such an extending method can also be used in the first and second embodiments.

In the first to fourth embodiments, the phosphor 10 is located at the bottom of the hole,
In other words, the shape is placed at the bottom of the discharge gas space, and it has a thousand-sided iC, but it is not necessary to stick to this, and the phosphor may also be attached to the side surface of the wall, as shown in FIG. In this way, the ultraviolet light generated in the discharge gas space 8 can be efficiently converted into visible light, increasing the luminance and efficiency of light emission, improving the display quality of the display, and reducing power consumption. .

In the first to fourth embodiments, the holes were square in shape,
It does not necessarily have to be a rectangular shape, but may be any shape such as a squared shape.

The numerical values described in the first and second embodiments are shown as examples, and do not limit the scope of application of the present invention.

Regarding the second electrode structure, any type of electrode structure may be used as long as row electrodes and column electrodes are formed on the first insulating substrate 1 side. Further, it is needless to say that the electrodes and the insulating layer do not need to be manufactured by thick film printing, and may be manufactured by a thin film process or the like.

〔Effect of the invention〕

As explained above, the present invention uses glass etching instead of conventional thick film printing to form walls that partition the B1 discharge cells and hold the discharge gas space, resulting in low cost and high yield. Manufactures color plasma display panels. Also, dimensional accuracy is much better for thick film printing.

7. Since the walls are formed by the otolithography method, large-area panels can be manufactured with irregularities and dimensions.

[Brief explanation of drawings]

1A and B are a plan view and a sectional view of a first embodiment of a plasma display of the present invention, FIGS. 2A and B are a plan view and a sectional view of a second embodiment of a plasma display of the present invention, 3A and 3B are cross-sectional views of the fourth embodiment of the present invention, and FIG. FIG. 6 is a perspective view of a conventional plasma display panel. DESCRIPTION OF SYMBOLS 1...First insulating substrate, 2...Second insulating substrate, 3...Column electrode, 4, 14...Row electrode, 5... ...First insulation scrap, 6...Second
Insulating layer, 7...MgO film, 8...Discharge gas space, 9...Wall, 10.29...
Phosphor, 2l... Rear glass plate, 2 2-...
...Front glass plate, 23...Auxiliary anode, 24
... Display anode, 25 ... Base electrode, 2
6...Cathode, 27...1 display cell, 2 8
−−−−−−Cell barrier.

Claims (1)

[Claims] It has a discharge gas space and two insulating substrates placed in parallel so as to sandwich the discharge gas space, and on the surface of the first insulating substrate facing the discharge gas space, striped column electrodes and striped column electrodes are provided on the surface of the first insulating substrate facing the discharge gas space. It has striped row electrodes that are electrically insulated from the electrodes and arranged in a direction perpendicular to the column electrodes, and holes are provided at positions corresponding to each pixel on the surface of the second insulating substrate facing the discharge gas space. A plasma display panel characterized in that the inner surfaces of the holes are coated with a phosphor, and the walls between the holes are in contact with a first insulating substrate.