JPS58103748A - Self-shift type gas discharge panel - Google Patents

Abstract

PURPOSE:To impede the accumulation of abnormal charge and prevent incorrect discharge by providing a drain section that leaks charge on a dielectric layer and preventing the said drain section from being covered with a secondary electron emissive layer so as not to generate discharge. CONSTITUTION:X-side shift electrodes X1J and X2J that are connected alternatively to two-phase buses X1 and X2 through their own parallel lead conductors are provided on the inner surface of a glass substrate 5 and the surfaces are covered with a dielectric layer 6. It is to be noted here that a shift channel terminal section is of drain structure by forming cracks only on the dielectric layers corresponding to a final shift electrode 11, and a surface layer 7 of MgO is not formed on the dielectric layer of the drain section. As a result of such structure, the drain section without forming MgO layer is exceedingly difficult to be discharged as compared with other display sections.

Description

[Detailed description of the invention]

(1) Technical field of the invention This invention relates to the improvement of so-called self-shifting gas discharge panels, particularly to prevent accidental erroneous discharge caused by uneven distribution of abnormal charges, and to suppress reduction in operating margin.

[This is related to the new panel structure.] (2) Background of the technology In general, self-shifting gas discharge panels are classified as AC memory-driven plasma displays, in which information written in the form of discharge spots is shifted in the same pattern to a predetermined position. It has a static display function. However, the electrodes of the panel are naturally corrugated with a dielectric layer in order to achieve the memory function, but
Conventionally, in panels with such a configuration, accidental abnormal discharges occur during operation, causing problems such as disrupting the displayed information in the panel and destroying the dielectric layer. There is a need for the development of self-shifting gas discharge panels. (3) Conventional technology and problems Abnormal discharge is caused by the so-called space charge coupling method, which actively utilizes the coupling of space charges in the shift operation, which is well known in Japanese Patent Application Laid-Open No. 53-8053. JP-A No. 49-48585 (U, S, P, AB781
This is particularly noticeable when a so-called wall charge transfer driving method is adopted, which actively utilizes the coupling of wall charges for the shift operation, as shown in No. 600). Therefore,
The reason for this is thought to be that abnormal charges are accumulated in a polarized state on the surface of the dielectric layer corresponding to the electrodes at both ends of the shaft channel as the shift operation is repeated. FIG. 1 is a diagram schematically showing the uneven distribution of charges, in which the horizontal axis represents a shift channel whose writing end is on the right side of the page, and the thin axis represents the electric potential. When such uneven distribution of wall charges becomes significant due to repeated shift operations and exceeds a certain value, the abnormal electric field based on this abnormal wall charge collaborates with an external electric field such as a shift voltage to induce an avalanche phenomenon in the vicinity. This causes an abnormal discharge that is not based on the information mentioned above. Now, in order to avoid the above-mentioned abnormal discharge, it is sufficient to provide a discharge function for the abnormal accumulated charge at both ends of the shift channel. A self-shifting gas discharge panel has been proposed that has a configuration in which pinholes or cracks are provided in the dielectric layer to allow abnormal charges to leak. There was a problem that oxidation of the electrode occurred during the firing process of the sealing material, and as a result, the discharge starting voltage of the corresponding part became lower than that of other parts.The drain part, which leaks charge, usually In the case of , because it was provided over a fairly wide area equivalent to one character and was used directly as a discharge cell, there was a difference between the discharge characteristics of the drain part and the discharge characteristics of other display parts. The upper limit value of the shift voltage applied to the shift electrode bus must be lowered by the amount that the discharge starting voltage of the shift electrode is lowered, which has the disadvantage of reducing the voltage (operation) margin. (4) Purpose of the Invention Purpose of the Invention The object of the present invention is to provide a new self-shift type gas discharge panel that solves the above-mentioned conventional problems. (5) Structure of the invention In order to achieve the above-mentioned object, the present invention provides Shift electrodes connected regularly in sequence are coated with a dielectric layer for charge storage to face the gas discharge space to constitute a shift channel consisting of a regular arrangement of a plurality of shift discharge cells, and In a self-shift type gas discharge panel in which a write electrode is provided at one end to constitute a write discharge cell, charges are applied to a dielectric layer corresponding to a portion of the write electrode that momentarily contacts the write discharge cell and a terminal shift electrode, respectively. This is achieved by providing a drain part for leakage, and by not covering the drain part with a secondary electron emitting layer to prevent discharge. (6) Examples of the invention Refer to the drawings below. Figure 2C is a cross-sectional view of essential parts showing an example of the configuration of a self-shifting gas discharge panel having parallel electrode conductors. , is an exploded plan view of the main parts, and the electrode array itself of the panel is, for example, disclosed in Japanese Patent Application Laid-Open No. 58-1
It has a 2×2 phase configuration as well known from No. 7059 and the like. That is, two-phase bus lines Yt
Two groups of Y-side shift electrodes yli and y! are alternately connected via parallel lead conductors (see FIG. 2C), respectively. i
There is a dielectric layer 8 on the surface and M with a large secondary electron emission coefficient.
It is covered with a surface layer (also referred to as a secondary electron emitting layer) 4 of g O. Moreover, on the inner surface of the other glass substrate 5, there is another two-phase bus line XIFX! Lead conductors parallel to each other (Fig. 2C
X-side shift electrodes Xlj alternately connected via
and Xzz, the surface of which is covered with a dielectric layer 6. What should be noted here is that the final shift electrode 11E has a paired structure at the terminal end of the shift channel, and that the MgO surface layer 7 is not formed on the current reading layer in the drain section. The effects of this structure will be described later. These X-side shift electrodes and X-side shift electrodes face each other in a relationship offset by half a pitch, and a shift discharge cell arrangement a' in which one electrode is sequentially shared by an adjacent cell between them.
* b 11 c 1 +1 d + + B t・
・−・−・−・・ is defined. Due to such a regular arrangement of shift discharge cells, write electrodes 9 are provided at the right ends of the three shift channels in the case of the figure, and write discharge cells W are formed between them and the first shift electrode yl]. . What should be noted here is that the frebus structure is adopted only for the write electrode 9G at the start end of the shift channel, and the frebus area is a portion that avoids the portion corresponding to the write cell, as is clear from FIGS. 2 and 8. This point is that it is only formed on the write electrode. Also, like the final shift electrode, the drain region on this write electrode is not coated with a surface layer of MgO. Now, with this configuration, the drain part where MgO is not formed is in a state where it is extremely difficult to discharge compared to other display parts, and in this example, it is not allowed to discharge at all, thereby balancing the discharge characteristics of both parts. I'm letting you do it. In addition, this drain section can prevent abnormal charge accumulation that would otherwise occur due to an erroneous discharge, similar to the conventional panel. Note that the shape of the shift electrode provided at the end of the shift channel does not have to be the same pattern as the shift electrode of the display section, and may be a line pattern as shown in FIG. 3. (7) As is clear from the detailed description of the invention, according to the C/lz7 type gas discharge panel according to the present invention, the % product of abnormal charges that cause erroneous discharge at both ends of the shift channel can be reduced. Since it is possible to prevent erroneous discharge by blocking the discharge, it contributes to improving the display quality, and there is also an advantage in that it eliminates the voltage difference between the drain section and the display section and prevents a decrease in the operating margin.

[Brief explanation of drawings]

Fig. 1 is a charge distribution diagram for explaining the accidental occurrence of abnormal discharge in a self-shift type gas discharge panel of the A, O mesori drive type, and Fig. 2 a to C are parallel electrodes to which this invention is applied. FIG. 3 is a cross-sectional view of a main part and an exploded plan view showing a self-shifting gas discharge panel having a lead conductor structure, and FIG. 3 is a plan view of a main part for explaining the present invention in detail. In the figure, 1 is a gas discharge space, 2 and 5 are glass substrates, 3 and 6 are dielectric layers, 4 and 7 are surface layers, and 8a
~8c is a shift channel, 9 is a write electrode, 9W is a drain part, 11E is a final shift electrode corresponding to the drain, 12
indicates the sealed part. Agent Patent Attorney Sada Igeta - Figure 1 Figure 3

Claims (1)

[Claims] A shift channel is formed by regularly arranging a plurality of shift discharge cells by covering shift electrodes regularly connected to a plurality of bus bars with a dielectric layer for charge storage and facing a gas discharge space. In a self-shifting gas discharge panel comprising a write electrode provided at one end of the shift channel to constitute a write discharge cell, a dielectric layer corresponding to a portion of the write electrode adjacent to the write discharge cell and a terminal shift electrode, respectively. 1. A self-shifting gas discharge panel characterized in that a drain portion is provided for leaking charges to a body layer, and the drain portion is not coated with a secondary electron emitting layer to prevent discharge.