JPS6079641A - Gas electric discharge panel - Google Patents

Abstract

PURPOSE:To simplify the positioning of electrodes in an AC-type gas discharge panel without forming the electrodes to multiple electrodes at the indicator section, by extending float electrodes in the gas discharge panel and by capacitively coupling them to drive electrodes at the extended portion of the floated electrodes. CONSTITUTION:Crossover side drive electrodes 23 and a short side drive electrode 24 are formed at the peripheries of a glass substrate 21 so that they extend to Y-axis direction, and float electrodes 25 are extended so that their extended portions 25a, 25b oppose to the drive electrodes 23, 24 respectively. On the other hand, Y-axis direction electrodes 30 are formed on a glass substrate 22 and the substrates 21, 22 are arranged so that electrodes on them orthogonally oppose, intermediated by a gap 33 sealed up with a mixed gas mainly composed of neon gas, and all these components form an AC-type gas discharge panel. Therefore, the float electrodes 25 obtain electrostatic capacity at their extended portions 25a, 25b, so that the structure and positioning of the electrodes are much simplified, eliminating the necessity of forming the electrodes to multiple electrodes at the indicator section.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an AC type gas discharge panel, in particular, it has a float electrode and a crossover side drive electrode and a short side drive electrode are formed on the periphery of the panel to achieve multiple driving. The present invention relates to an electrode structure of an AC type gas discharge panel.

Background of the technology A plurality of X-axis direction electrodes and Y-axis direction electrodes facing and perpendicular to the X-axis direction electrodes are selected and multi-driven in a matrix, and an electro-optic effective substance present between the electrodes, such as a mixed gas mainly composed of neon gas, is A that displays by excitation and emitted light, etc.
In order to increase the total display capacity of the C-type gas discharge panel,
It is necessary to increase the number of electrodes in the X-axis direction and the Y-axis direction.

Prior art and problems When increasing the apparent capacity of this type of gas discharge panel,
As described above, the number of electrodes in each direction increases, and the number of drive circuits increases accordingly.

As a solution to this problem, a gas discharge panel shown in FIG. 1 has already been proposed by the applicant. Note that FIG. 1 shows a cross section of a portion of the gas discharge panel.

This gas discharge panel 1 is constructed as follows.

2.3 is a glass substrate, on the glass substrate 2, a plurality of main electrodes 4 are formed in parallel with a predetermined interval as electrodes in the X-axis direction perpendicular to the paper surface, and on both sides of the 6 main electrodes 4. , control electrodes 5 are formed at predetermined intervals, for example, at intervals of several μm. Reference numeral 6 denotes an insulating layer covering these electrodes, and a float electrode 7 facing above these electrodes is buried in the insulating layer 6. A protective layer 8 is formed on the surface of the insulating layer 60. Further, on the glass substrate 3, a plurality of Y-axis direction (horizontal direction in the figure) electrodes 9 are formed in parallel with a predetermined interval, and a transparent insulating layer 10 and a protective layer 11 are sequentially formed on the electrodes 9. ing. And these two glass substrates 2
．． 3 are integrated so that the protective layers 8 and 11 face each other with a predetermined gap between them, and the main electrode 12 and the Y electrode 9 are orthogonal to each other, and an electro-optic effective substance 1 such as neon gas is placed in the gap n between the protective layers. The waste discharge panel 1 is constructed by filling a mixed gas mainly consisting of:

FIG. 2 shows that (X
Axial direction: 9) Main electrode groups 4+, 4+, 4g and control electrode groups 51, 5 when displaying X (Y-axis direction: 9) = 81
This shows the arrangement of 2,511. In the figure, the dashed lines 71, 72, . . . , 79 indicate float electrodes, and the Y electrodes are not shown. Main electrode group 41.42.4
+l has a comb-like electrode structure consisting of three main electrodes 4, each of which is electrically connected at one end and has the same potential as a unit. This connection portion corresponds to the short side drive electrode and is formed at one peripheral portion of the panel. On the other hand, control electrode groups 51, 5i,
5g also has a comb-shaped electrode structure in which six main electrodes 40 and control electrodes 5 on both sides are connected as shown in the figure, and one end of each is electrically connected independently to have the same potential. There is. This connection portion corresponds to the crossover side drive electrode and is formed on the other peripheral portion of the panel (the peripheral portion opposite to the short side drive electrode forming peripheral portion).

The float electrode 7 is connected to the main electrode 4. Control electrode 5 and predetermined capacitance C? 4. It is designed to carry C75k. Therefore, when the voltage var is applied to the main electrode 4 and the voltage VB is applied to the control electrode 5, the potential ■ of the float electrode 7 becomes a value according to the following equation.

That is, the potential 5 of the float electrode 7 can be changed depending on the voltage Vz of the main electrode and the voltage 3 of the control electrode. For simplicity, let cya=c'ys and v8
If the maximum value of and the maximum value of v8 are the same V, then v8 and v
Depending on the value of 2, 6 changes as follows.

When Vg = 0 * Vs = 0, v5 - OVs
=V, VB = 0 (D (!:ki, V3=V/
2v2=0. When Vs-■, V, =V/2V*-V
t Va "'V (When D, Vs = V
8 and control electrode group 5 t*52+5g, float electrodes 71, 7g+...7
The potential of 9 is one of the above. For example, 1 main electrode group 4
When the voltage ■ is applied to the control electrode group 51 and the voltage V is applied to the control electrode group 51, the voltage of the float electrode 71 becomes ■, and the float electrode 74.7? The voltage at is /2, and the other voltages are 0.

Here, the control electrode groups 51, 52, 511 and the main electrode group 4
1, 4 m +48 are arranged in a matrix, and depending on the combination of C and C, there is only one position where the potential of the float electrode becomes V. Therefore, the potential becomes V by selectively driving these electrode groups)! One pole can be selected. Then, the discharge voltage gas sealed in the gap 12 is discharged at the intersection of the selected one float electrode and the Y electrode orthogonal thereto. Note that a portion where the potential of the float electrode intersects with a portion where the potential is -7EV/2 or 0 is set so that the discharge stops or the previous erased state is maintained.

When displaying (X-axis direction: 9)X (Y-axis direction: 9) as shown in FIG. 2, a normal gas discharge panel uses 9 X electrode drive circuits and 9 Y electrode drive circuits. A total of 18 drive circuits are required, whereas 7 drive circuits are required.
In the case of FIG. 2 in which the 0-toe electrode is used, the number of drive circuits for the X electrode is reduced to 3 each for the main electrode and the control electrode, and 9 for the Y electrode, resulting in a total of 15 drive circuits.

As is clear from this example, with the conventional float electrode AC type gas discharge panel that performs multiple driving by forming crossover electrodes and short electrodes on the periphery of the panel, it is possible to reduce the number of drive circuits. It is possible.

However, in this case, since the float electrode is formed in the display area so as to face the lower electrode (main electrode, control electrode), it is necessary to align the float electrode and the lower electrode with high precision. The disadvantage is that the formation of the crossover electrode also requires advanced technology.

OBJECTS OF THE INVENTION The present invention is intended to solve the above-mentioned drawbacks, and it is an object of the present invention to provide a gas discharge panel with a simple electrode structure in which the float electrodes can be easily aligned.

Structure of the Invention In the present invention, the above object is achieved by extending the float electrode to the crossover side drive electrode formation part and the short electrode formation part, and capacitively coupling the float electrode to the drive electrode at the extension part.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to FIGS. 3 to 5.

A first embodiment is shown in FIGS. 3 and 4.

FIG. 3 is a front sectional view of a gas discharge panel according to the present invention.
In the figure, 21 and 22 are glass substrates.

A crossover-side drive electrode 23 and a short-side drive electrode 24 extending in the Y-axis direction (perpendicular to the plane of the drawing) are formed on the glass substrate 21 at the periphery. The float electrode 25 formed in the horizontal direction (in the left and right direction in the figure) is extended to the periphery of the panel.
5b, each drive electrode, an insulating layer 26, and a protective layer 29 are sequentially formed.

On the other hand, a Y-axis direction electrode 30 is formed on the glass substrate 22, and an insulating layer 31. A protective layer 32 is sequentially formed.

These two glass substrates 21 and 22 are arranged so that the electrodes on each substrate are perpendicular to each other and the protective layers on each substrate face each other with a gap 33 (corresponding to a discharge space) in between, and are sealed. It is sealed tightly. The drive electrodes 23, 24, the extensions 25a+25tz of the float electrode 5 facing them, and the insulating layers 26.degree. 27 are formed outside the seal (periphery of the panel). The gap is filled with a gas mixture mainly consisting of neon.

In this way, the float electrode 25 is extended to the periphery of the panel, and the extended parts 25B and 25b other than the display part face each of the drive electrodes 23 and 24 to obtain a coupling capacitance. , as shown in FIG.
The a*25bfc fc display section also has a large area to facilitate alignment. In addition, Fig. 4 shows 16
For the float electrode 25 of the line, on the short side, all 4 groups of 4 electrodes are formed from the end, and the extension part 25 b of each group is connected to an independent common short side electrode 2.
4, and on the crossover side, four groups of four electrodes are formed every fourth, and the extension portions 25a of each group are arranged to face the common crossover side electrode 23, which is arranged in parallel independently. An example is shown below.

Although FIG. 3 of this example shows an example in which float electrodes are formed on only one glass substrate for multiplexing, it is possible to perform multiplexing by forming all float electrodes on both glass substrates. In this case, the number of drivers in the X-axis direction and Y@ direction is 62Ji, 2J'i (N.

Since M can be reduced to (the number of display electrodes in the X-axis direction and Y-axis direction), the scale of the drive circuit can be significantly reduced.

FIG. 5 shows a second embodiment.

In this example, the extension part of the float electrode is formed on the same plane as the surface part (the entire float electrode including the extension part is formed directly on the glass substrate). The process is simplified by allowing the insulating layer between the two and the insulating layer on the float electrode display section to be formed at the same time.

The concrete structure of the device is as shown in FIG. 5), and the same reference numerals as in the previous example are given to the members of the circuit structure. In the figure,
41 is a flow electrode, 42 is an insulating layer, the float electrode 41 is formed in a planar shape on the glass substrate 21 including the extension parts 41a and 41b, and the insulating layer 42 is formed to cover the float electrode 41. I'm here.

As is clear from the comparison between this figure and FIG. In this case, the insulating layer formed separately on each drive electrode and the float 1L electrode display section is replaced with an insulating layer 42 -C
They can be formed in one piece, and in addition to the effect of using the same material as the previous example, it is possible to have the effect of simplifying the insulating layer forming process.

Effects of the Invention As described above, according to the present invention, the float electrode is extended to the peripheral part of the panel and capacitively coupled to the drive electrode at the extended part, and multiple electrodes are not formed in the display part. , structure of the electrode.

Since there is no need to form a short point between the upper and lower electrodes that face each other with an insulating layer in between, the structure of the crossover electrode is also simplified. In particular, if the float electrode is configured as shown in FIG. 5, the process of forming the insulating layer can be simplified.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the main parts of a conventional gas discharge panel having a float electrode, FIG. 2 is a layout diagram of the same electrode, and FIGS. 3 to 5 are examples of a gas discharge panel according to the present invention. 3 is a sectional view of the gas discharge panel of the first embodiment, FIG. 4 is a diagram of the electrode arrangement, and FIG. 5 is a sectional view of the gas discharge panel of the second embodiment. In the figure, 21 and 22 are glass substrates, 23 is a crossover side drive electrode, 24 is a short side drive electrode, 25 and 41
are float electrodes, 25a r25b, 41a, 41
b is the float electrode extension, 26 r 27 + 28
+ 31 e 42 is an insulating layer, 29 and 32 are protective layers,
30 is a Y-axis direction electrode, 33 is a gap, and 34 is a seal C. Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] In an AC type gas discharge nozzle that carries out multiple driving by forming a cross-over side drive electrode and a short-side drive electrode on the periphery of the panel, the float electrode is An insulating layer extends to the cross-over side drive electrode forming part and the short side drive electrode forming part, and is capacitively coupled to each of the drive electrodes at the extension part, and an insulating layer is provided on the visible part of the float electrode. A gas discharge panel characterized in that: 2. The float electrode is formed into a planar shape including the extension part, and the insulating layer between the float electrode extension part and the valley drive electrode, and the insulating layer on the light display part of the float electrode are formed so as to cover the float electrode. The gas discharge panel according to claim 1, which is formed on the same surface.