JPH0576736B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to an improvement of a surface discharge type gas discharge panel in which a write discharge cell and a sustain discharge cell are provided separately, and in particular improve display quality. This relates to a new panel structure.

(b) Prior Art and Problems A type of gas discharge panel known as a plasma display panel is a surface discharge type display panel. However, in one of the gas discharge panels of this type, a writing discharge cell and a sustaining discharge cell are separately provided in Japanese Patent Application Laid-Open No. 78751/1983, and this sustaining discharge cell is composed of a pair of electrodes located on the same surface. A panel structure has been proposed in which thermal damage to the dielectric layer due to sustained discharge that continues over time is reduced, thereby extending the life of the dielectric layer. This document also shows a panel structure in which a selection logic function is provided to a group of discharge cells inside the panel to facilitate external connection of a pair of discharge sustaining electrodes and to simplify the configuration of a drive circuit. Figure 1 shows the electrode arrangement of a panel with this selection logic function. The other discharge sustaining electrode 3A forming a pair of the same rank in the group
~3H comrades are connected in common and led out to terminals Y21 to Y24. Note that W1 to W5 are write electrodes.

However, in this panel structure, certain sustain discharge cells (for example, SC-11, SC-21, SC-31,
A group of discharge cells in the above-mentioned discharge mode when a new discharge is generated in the sustaining discharge cell SC-22 which is in the same group as those cells and adjacent to it in a display state where continuous discharge is occurring in SC-41). Among them, there was a problem that the discharge of the SC-31 cell was canceled. Regarding this, the second
This will be explained in detail with reference to the drive voltage waveform shown in the figure. First, the write discharge cell WC paired with the sustain discharge cell SC-22
Since it is necessary to generate a discharge at -22, a write voltage pulse WP of around +90V as shown in Figure 2 d is applied to the write electrode W2, and a sustain voltage pulse of around -130V as shown in Figure 2A is applied to the discharge sustain electrode 2A2 through terminal Y11.
Apply SP respectively. As a result, a desired write discharge occurs in the write discharge cell WC-22, but at the same time discharge also occurs in the other write discharge cells WC-12, WC-32, and WC-42 in the same group. This discharge is accompanied by the generation of charges, of which positive charges are accumulated on the surface of the electrode coating layer corresponding to each write discharge cell and the sustain discharge cell adjacent thereto. Therefore, after this, when a sustaining voltage pulse SP (see FIG. 2b) is applied to the other sustaining electrode 3B associated with the selective sustaining discharge cell SC-22 through the terminal Y22, the selective sustaining discharge cell SC-22 A desired discharge is generated in SC-22 in a manner that takes over the first write discharge. At the same time, the sustain discharge cell SC-21 in the sustain discharge generation state generates a sustain discharge because the surface of the corresponding electrode insulating layer is in a positive wall charge accumulation state. At this time, the positive wall charge accumulated on the surface of the electrode insulating layer corresponding to the sustain discharge cell SC-31 adjacent to this cell SC-21 is the charge generated due to the discharge of the discharge cell SC-21. They combine, are neutralized, and eventually disappear. As a result, this sustain discharge cell SC-31 has a discharge sustain electrode 2A3 after this.
and 3C alternately with negative sustaining voltage pulses SP [Fig. 2a
and c] is applied, it becomes impossible to generate a sustaining discharge. In short, this induces discharge errors, which causes deterioration in display quality. This problem can be solved by increasing the distance between adjacent discharge cells, but this increases the discharge point pitch and reduces the resolution.

(c) Purpose of the Invention In view of the above-mentioned conventional situation, the present invention provides a surface discharge type gas discharge having a configuration in which write discharge cells and sustain discharge cells are separated and the selection logic function is made to wait for the discharge cell group. The object of the present invention is to provide a new panel structure that prevents charge coupling between adjacent sustain discharge cells and prevents discharge errors without deteriorating resolution. (d) Structure of the Invention Briefly stated, the present invention includes a plurality of discharge sustaining electrodes arranged adjacent to each other on one of a pair of substrates facing each other with a gas discharge space in between. Write electrodes are arranged so as to be covered with each other, and are arranged above each sustaining electrode in an insulated manner in a direction crossing the sustaining electrodes, and one electrode and the other electrode are adjacent to each other with respect to the pair of adjacent sustaining electrodes. In a gas discharge panel structure in which the electrodes are driven with a sustaining voltage of opposite phase, the charge generated due to the discharge of the sustaining discharge cell defined by the electrode pairs is transferred between each sustaining electrode pair. It is characterized by the provision of an insulating partition wall that restricts movement.

(e) Embodiment of the invention Hereinafter, an embodiment of the invention will be described in detail with reference to the drawings.

FIGS. 3 and 4 show a plan view and a sectional view of essential parts of the electrode arrangement of a gas discharge panel according to this embodiment. In these figures, vertical discharge sustaining electrodes [2A, 3A] and [2B, 3B] each having a pair of adjacent comb tooth protrusions 2a, 3a are disposed on a lower glass substrate 1 functioning as an electrode support substrate. ] [2C,
There are 4 sets of 3C] [2D, 3D], 8 in total,
Comb tooth protrusions 2a, 3a facing each other of these electrode pairs
Thus, eight sustain discharge cells SC-mn (mn is a positive integer) are configured. Regarding these discharge sustaining electrode pairs, one electrode 2A, 2B, 2C and 2
D are commonly connected to the bus bar 11 and driven simultaneously;
The other electrodes 3A, 3B, 3C and 3D are individually led out and driven independently. Further, on these discharge sustaining electrode pairs, a horizontal write electrode 5 is provided with a vapor deposited layer 4 of borosilicate glass or the like interposed therebetween.
A and 5B are provided, and a vapor deposited layer 6 of borosilicate glass or the like and a surface layer 7 of MgO are further coated thereon. These write electrodes 5
A, 5B and one of the discharge sustaining electrodes 2A, 2B,
At each intersection with 2C and 2D, there is a write discharge cell WC.
−mn is constructed. Further, on the same surface adjacent to these write electrodes, a discharge regulating electrode 10 having a floating structure is arranged to prevent the discharge of the write discharge cell defined by the write electrode from extending to unrelated adjacent sustain discharge cells. has been done. Then, an upper glass substrate 8 for a cover is arranged opposite to the electrode substrate structure 1 constructed in this way, and the periphery of these substrates is sealed with frit glass.
Further, a predetermined discharge gas is filled in the gap 9 to complete the panel.

The structure up to this point is the same as the conventional one, but
In the present invention, in addition to this, a linear insulating partition wall 10 as shown in the figure is provided at an intermediate position between each pair of discharge sustaining electrodes. This insulating barrier rib 10 is formed of low-melting glass mainly composed of PbO, for example, and has a structure that partitions the sustain discharge cell SC-mn and the write discharge cell WC-mn in the electrode arrangement direction. Completely prevents charge transfer,
In other words, the range of charge diffusion can be limited to the permissible region corresponding to the corresponding discharge cell. Therefore, in the above-mentioned discharge error problem in the conventional panel, that is, in the state where sustain discharge cells SC-11, SC-21, SC-31, and SC-41 are generating sustain discharge, if the sustain discharge cells are in the same group as those cells and one of those cells
When a new discharge is generated in sustaining discharge cell SC-22 adjacent to SC-21, the resulting space charge is combined with the positive charge accumulated on the surface of the insulating layer corresponding to discharge cell SC-31 in the above-mentioned discharge mode. This can solve the problem of bonding and neutralizing the accumulated charges and causing them to disappear.

FIG. 5 is a diagram for explaining the effect of expanding the voltage margin by this insulating barrier rib 10, in which the horizontal axis shows the write voltage VW, the vertical axis shows the sustain voltage VS, and
VSmin indicates the lower limit minimum sustaining voltage value that causes sustaining discharge. As you can see in this figure, the insulation partition 1
In a panel where 0 does not exist, only a very narrow voltage margin can be obtained as shown by the hatched line.In other words, when the write voltage VW is set to +90 to 100V, a sustain voltage VS of -120V or higher induces a discharge error. Ta. However, in the pulse of the present invention in which the insulating barrier rib 10 is provided, a wide range of voltage margins indicated by diagonal lines can be obtained.

Note that the shape of the insulating partition wall 10 is not limited to a linear one, but also a comb-like shape or a grid-like shape as shown in FIGS. 6a and 6b. There is an advantage that electrode coupling between discharge cells in the direction can also be prevented. Therefore, the discharge regulating electrode 12 can be omitted as shown. Further, the insulating partition wall can be installed on the upper glass substrate 8 for the cover, but in this case, it is preferable that the top end thereof be formed so as to be in contact with the MgO surface layer 7 on the lower glass substrate 1; This is convenient because it also serves as a spacer that defines the discharge gap. Furthermore, it is also possible to form one insulating partition by providing small-sized insulating partitions on each of the lower glass substrate 1 and the upper glass substrate 8.

(f) Effect of the Invention As is clear from the above description, according to the present invention, it is possible to eliminate discharge errors while maintaining high resolution by targeting a surface discharge type panel in which a write discharge cell and a sustain discharge cell are separated. It is possible to provide a high-quality display function with significantly reduced occurrence of.

[Brief explanation of the drawing]

Figure 1 is an electrode layout diagram of a surface discharge type gas discharge panel with a conventional selection logic function, Figure 2 is a drive voltage waveform diagram to explain the discharge operation of this panel, and Figures 3 and 4 are of this type. An electrode arrangement diagram and a sectional view of main parts showing a surface discharge type gas discharge panel to which the invention is applied,
FIG. 5 is a diagram for explaining the effect of the panel of the present invention, and FIG. 6 is a diagram showing a modification of the present invention. 1: Lower glass substrate for electrode support, 2 and 3:
A pair of discharge sustaining electrodes, 4 and 6: dielectric layer,
5: Write electrode, 7: MgO surface layer, 8: Upper glass substrate for cover, 9: Discharge gas space, 10: Insulating partition, 11: Bus bar, 12: Discharge regulating electrode, Wc
-mn: Write discharge cell, Sc-mn: Sustain discharge cell.

Claims (1)

[Scope of Claims] 1. A plurality of discharge sustaining electrodes 2, 3, which form a pair adjacent to each other on one substrate 1 of a pair of substrates 1, 8 facing each other with a gas discharge space 9 in between, are formed of a dielectric layer. 4
write electrodes 5 are arranged so as to be covered with the electrodes, and are arranged above each of the discharge sustaining electrodes so as to be insulated in the direction crossing the electrodes, and one of the adjacent electrodes with respect to the pair of adjacent discharge sustaining electrodes is provided. In a gas discharge panel structure in which the electrode and the other electrode are driven with sustaining voltages of opposite phase, a sustaining discharge cell (Sc-mn 1. A surface discharge type gas discharge panel characterized in that an insulating partition wall 10 is provided to restrict the movement of electric charges generated during discharge.