JPH046734A - Gas discharge display panel - Google Patents

Abstract

PURPOSE:To stabilize the auxiliary discharge characteristic and obtain a large maintenance pulse margin by performing an AC discharge as the mode of the auxiliary discharge, and restricting the area of a dielectric layer where charges are accumulated during the AC discharge. CONSTITUTION:A group of auxiliary electrodes PD serving as electrodes on one side to cause an auxiliary discharge are formed by the thick-film printing or thin-film technology on a back plate RP made of a glass plate. The first dielectric layer DL1 formed with dielectric paste by thick-film printing is coated on it, and the second dielectric layer DL2 is coated on it except the portion of the first dielectric layer DL1 to be exposed in the same method as the first dielectric layer DL1. A group of cathodes KD are formed on it by thick-film printing in parallel with a group of the auxiliary electrodes PD. The exposed area exposed from the display cell of the dielectric layer having the first electrode immediately below it is set to 15-80% of the exposed area for the second electrode.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to the structure of a gas discharge display panel, and particularly to the structure of a two-piece discharge display panel for a pulse memory drive method consisting of a front plate and a back plate. It is related to.

(Summary of the Invention) The present invention relates to the configuration of a gas discharge display panel in which an auxiliary discharge, a writing discharge, and a sustaining pulse discharge are performed in the same discharge cell, in which the form of the auxiliary discharge is an alternating current discharge. The area of the dielectric layer in which charge is accumulated during AC discharge is regulated, and the surface thereof is recessed relative to the cathode surface. In this way, stable auxiliary discharge characteristics and a large sustaining pulse margin are obtained at the same time.

(Prior art) Pulse memory drive system for discharge display panel (Unexamined Japanese Patent Publication No. 1983-
(Refer to No. 86886 “Driving method of gas discharge display panel”)
This method allows a relatively simple panel to have a memory function, and is a very effective means for obtaining a high-brightness flat display device. A state-of-the-art panel using this driving method is a prior art panel whose perspective view is shown in FIG.

As shown in FIG. 5, the conventional panel is composed of a back plate RP and a front plate FP, and a cathode group KD and a partition wall B are sequentially formed on the back plate RP by a method such as thick film printing. - On the male front panel FP, an auxiliary anode group SA and a display anode group DA are also formed by printing technology or the like. The peripheries of these two substrates are sealed with a sealant, and after being evacuated, a certain amount of gas is filled.

As can be seen from the structure shown in FIG. 5, the display cell DC and the auxiliary cell SC are arranged on the same plane with respect to the display screen. In addition, part of the partition wall B between the display cell DC and the auxiliary cell SC is lower than other parts, creating a path (hereinafter referred to as a priming path) through which charged particles and metastable particles from the auxiliary discharge of the auxiliary cell SC can diffuse. PT) and display cell D
It is devised to start C discharge stably and in a short time. In addition, when colorizing, the display cell DC of the front panel FP
A predetermined phosphor is applied to the inside of the portion and the partition wall B.

(Problem to be Solved by the Invention) In this type of DC panel, as described above, the display cell D
In order to stably and reliably perform the discharge at C, the assistance of auxiliary discharge is essential, and in the panel of the prior art, the auxiliary cell SC that performs the auxiliary discharge has a groove structure and is placed beside the display cell DC. There are two major problems as shown below.

The first is the latest conventional technology panel (TV Science and Technology Report, Vo.
The average pitch of display cells DC is 0.65 mm, but in order to apply the panel as a television display device or an OA terminal device, the display cells It is necessary to make the DC pitch smaller. In order to reduce the pitch of display cells DC, auxiliary cells SC and display cells DC must be miniaturized. However, according to the experimental results conducted by the inventors of the present application (see the above-mentioned TV Technical Report), in order to stably drive the pulse memory, the auxiliary anode S should be placed in the center of the auxiliary cell SC.
It is necessary to place A accurately and perform auxiliary discharge stably.

That is, each part of the front plate and the back plate must be accurately aligned. Therefore, when component precision in panel manufacturing is taken into consideration, there is a natural limit to miniaturization of the auxiliary cells SC, and the pitch of the display cells DC cannot be made sufficiently small. In response to this, a report targeting devices for OA terminals proposes a pulse memory-driven gas discharge display panel that uses one cell as a display cell DC and an auxiliary cell SC (TV Science and Technology Report, Vol.
, IL Nα27, pp. 55-60.1987).

Since this panel does not have independent auxiliary cells SC, it is possible to reduce the pitch of display cells DC.

However, since DC auxiliary discharge occurs in the display cell, the light emission due to the auxiliary discharge becomes stronger and the contrast is significantly reduced. As a result, it is impossible to apply it to a television display device, and it is not preferable to use it for an office automation terminal.

Next, the second problem is that in the conventional panel, the auxiliary cell SC
has a groove structure. This is the result of devising a way to ensure that charged particles and metastable particles caused by auxiliary discharge in the adjacent auxiliary cell SC diffuse along the groove, and that the auxiliary cell SC of interest causes a discharge stably, reliably, and in a short time. . However, forming the auxiliary cells SC in a groove structure as described above imposes strong restrictions on the arrangement of the display cells DC. For example, even if you try to create a so-called staggered arrangement like the configuration shown in Figure 6, in which the display cells DC are shifted by 1/2 pitch in every other row, the auxiliary cells SC have a groove structure, resulting in a very complicated panel structure. It becomes difficult to manufacture. On the other hand, for ease of manufacturing and driving the panel, it is desirable to obtain the best sharpness and resolution in terms of image quality with a minimum number of cells.

For this purpose, it is necessary to freely select the arrangement of the display cells DC, but since the auxiliary cells SC have a groove structure in the panel, it is difficult to achieve this purpose.

The purpose of the present invention is to improve such drawbacks and provide a gas discharge display panel with a fine cell pitch in which the arrangement of display cells DC can be freely selected and can be applied to television display devices and OA terminal devices. That is.

(Means for Solving the Problems) In order to achieve this object, the gas discharge display panel of the present invention has the following features:
In a two-piece gas discharge display panel consisting of a front plate and a back plate, the back plate is provided with a single or mutually parallel first electrode, a dielectric layer, and a first electrode. A plurality of parallel or orthogonal mutually parallel second electrodes are successively laminated and deposited, and the front plate has a plurality of mutually parallel third electrodes orthogonal to the second electrodes on the front plate. The dielectric layer having the first electrode directly below is exposed to the display cell at the base of the display cell configured by depositing and arranging a partition wall so as to include the second electrode at the base. The exposed area is 15X~8 that of the second electrode.
0X.

(Function) According to the gas discharge display panel having the structure of the present invention, the auxiliary cell that performs AC discharge and the display cell that performs DC discharge are arranged in the same cell, and moreover, the AC discharge here is This occurs between the electrode under the dielectric layer and the exposed electrode on the dielectric layer, and once a discharge occurs, the charged particles generated by the discharge accumulate on the dielectric layer, forming a wall voltage in the opposite direction. Therefore, the voltage applied to the cell drops equivalently and the discharge stops instantly. Therefore, in a panel in which such alternating current discharge is used as an auxiliary discharge, light emission due to the auxiliary discharge can be suppressed to a low level, so that a discharge display panel having fine discharge cells can have high contrast.

(Example) Before explaining the present invention in detail with reference to an example, the present invention will be explained based on the fact that the exposed area of the dielectric layer defined in the claims of the present invention is regulated with respect to the cathode area. We will explain our findings.

What is important when driving a discharge display panel using the pulse memory driving method is that the auxiliary discharge is carried out stably and reliably, and that the stable operating voltage range of the sustain pulse applied to the cells (hereinafter referred to as the sustain pulse margin) is important. ) is sufficiently large. Based on the panel configuration shown in FIG. 1, the inventors of the present application have studied in detail the operating characteristics of panels in which the exposed area of the dielectric layer is changed. The characteristics shown in FIG. 7 are an experimental example of the relationship between the ratio RT of the area of the exposed dielectric layer to the area of the cathode and the auxiliary pulse voltage. the ratio RT is small;
That is, when the area of the exposed dielectric layer becomes smaller than the area of the cathode, it becomes difficult to cause a discharge, and the voltage required to obtain a stable discharge becomes higher. The characteristic shown in FIG. 8 is an experimental example of the relationship between the ratio RT and the sustain pulse, and the shaded area in the figure is the stable sustain pulse discharge region.

These results indicate that the ratio RT of the area of the exposed dielectric layer to the area of the cathode must be approximately 15X to 8ON in order to drive the gas discharge display panel of the present invention with pulse memory and obtain good characteristics. There is.

If the ratio RT exceeds this value, a sufficient sustaining pulse margin cannot be obtained, and even if the ratio RT exceeds this value, a stable auxiliary discharge cannot be obtained. Based on the above findings, the gas discharge display panel of the present invention is characterized in that the ratio RT of the area of the exposed dielectric layer to the area of the cathode is 15X to 80'X.

Several examples of detailed configurations of the gas discharge display panel of the present invention having such characteristics will be sequentially explained below.

FIG. 1 shows a perspective view of the structure of a first embodiment of the display panel of the present invention. FIGS. 2 and 3 are a cross-sectional view and a plan view of the first illustrated panel.

An auxiliary electrode group PD, which serves as one side electrode for generating an auxiliary discharge, is formed on the back plate RP made of a glass plate or the like using thick film printing or thin film technology, and a dielectric paste or other material is adhered thereon by thick film printing. A second dielectric layer DL is coated thereon in the same manner as the first dielectric layer DL+, except for the exposed portion of the first dielectric layer DL+. DL2 is deposited and formed. Furthermore, a cathode group KD is formed thereon in parallel with the auxiliary electrode group PD by thick film printing or the like. Thereafter, a partition wall B is formed by printing a thick film of insulating paste so as to surround the exposed portion of the dielectric. on the other hand,
The front plate FP has an anode group AD perpendicular to the cathode group KD.
is formed using thick film technology or thin film technology. Above 2
The two substrates are stacked on top of each other, their peripheries sealed with a sealant, evacuated, and then filled with one or more rare gases.

The operation of the present invention will be briefly explained with reference to FIG. The basic driving method is disclosed in Japanese Patent Application Laid-Open No. 60-194495 "Driving Method of Gas Discharge Display Panel" and Japanese Patent Application No. 60-515.
This is a driving method such as that described in No. 70 "Driving Method of Gas Discharge Display Panel" specification.

In other words, an auxiliary discharge is caused once between the auxiliary electrode group PD and the cathode group KD in all or part of the display cell DC, and after a certain period of time, when the priming conditions for writing have become optimal, the anode group AD and the cathode After a write discharge is generated between the groups KD, the pulse discharge is continued by a sustain pulse applied between the anode group AD and the cathode group KD.

In this example, a step is provided between the exposed part of the dielectric and the surface of the cathode, but this can prevent the exposed part of the dielectric from being contaminated by cathode spatter, which becomes noticeable during pulsed memory discharge. , auxiliary discharge can be performed stably for a long time. Furthermore, since the spread of the auxiliary discharge can be completely restricted, high contrast can be obtained. When cathode sputtering is not a problem, the second dielectric layer DL2 may be omitted. A priming path PT is provided on the partition wall B of the display panel of the present invention, but when operating speed is not a big issue, priming can be obtained through the naturally occurring gap.
In particular, it is not necessary to provide the priming path PT. Also,
The priming path PT does not need to be provided on the four sides of the partition wall B. The shape of the exposed portion of the first dielectric layer DL+ may be circular here or any other shape, and the position of the exposed portion may be anywhere on the base of the display cell, but the contrast is that it is directly under the anode group AD. It is desirable because it increases the

FIG. 4 shows a sectional view of a panel structure according to a second embodiment of the present invention. The second embodiment is a panel in which one intermediate electrode group MD is added to the first embodiment. Specifically, ``a cathode group KD is provided in the middle of the second dielectric layer DL2 in the first embodiment.
It has a structure in which the intermediate electrode group MD is arranged parallel to or at right angles to. The panel is basically made in the same manner as in the first embodiment. This panel is characterized in that auxiliary discharge is performed between the intermediate electrode group MD and the auxiliary electrode group PD.

By adding the intermediate electrode MD, it is possible to completely confine the auxiliary discharge within the pores, thereby increasing the contrast. Furthermore, when the intermediate electrode group MD is orthogonal to the cathode group KD, the intermediate electrode group MD can be used as a write electrode, and at this time, it is only necessary to apply a sustain pulse to the anode group AD. It can be a common electrode. In this case 1, the resistance of the anode group AD can be reduced by arranging the busbar of the anode group AD above the partition wall B. During sustaining pulse discharge, a large amount of cell discharge current flows through the anode group AD, so if the resistance value of the anode group AD is high, the characteristics will deteriorate due to the voltage drop, but if the form of the anode group AD is adopted, the characteristics will deteriorate due to the voltage drop. Deterioration can be prevented.

In the embodiments described above, the display cells DC are arranged in a grid pattern, but a staggered arrangement as shown in FIG. 6 or other arrangements can be easily achieved by simply changing the shape of each electrode.

The panel of the present invention can also be used as a color display panel using phosphors. The phosphor may be applied to the inside of the front plate FP corresponding to the display cells DC, the inside of the partition wall B, etc. by printing, exposure, or the like. When a phosphor is applied inside the partition wall B, a structure in which the auxiliary discharge is performed inside the holes as in the second embodiment is suitable in terms of increasing the contrast.

In the panel of the present invention, the partition walls B can be tapered, and in this case, a configuration in which the inside of the partition walls B is coated with a phosphor is advantageous in increasing the luminous efficiency.

Also, although the contrast decreases somewhat, it is possible to change the anode group AD to IT.
It is also possible to use a transparent electrode such as O (oxide of indium or tin).

In the above embodiments, the auxiliary electrode group PD under the dielectric layer has a separate structure parallel to each other, or may be connected to one electrode or divided into several blocks. At this time, the auxiliary discharge is performed in all cells or cells divided into blocks.

Even in a discharge display panel called an AC type, it is possible to take the form of auxiliary discharge shown in the discharge display panel of the present invention.

Note that, similar to the present invention, a panel configuration has been announced in which one electrode is an exposed electrode and AC discharge is used as an auxiliary discharge (SOC, Information Disp
lay.

Digest Tech, Papers, pp.
355-357.1989), whereas the present invention is characterized by regulating the area of the exposed dielectric layer relative to the cathode area for the purpose of improving the characteristics during pulse memory driving, in this case This is clearly different from the present invention because the panel does not have a memory function and there is no restriction on the area of the exposed dielectric layer relative to the area of the cathode.

(Effects of the Invention) As described above in detail, according to the present invention, since there is no independent auxiliary cell SC as in the prior art, the pitch of the display cells DC can be made sufficiently small, and the pitch of the display cells DC Since the array of cells can be freely arranged, image quality such as resolution and sharpness can be improved with a minimum number of cells, and application to television display devices and OA terminal devices is fully possible. Furthermore, since it is not necessary to accurately align the auxiliary anode SA of the front plate FP with the space in the auxiliary cell of the rear plate PR, it is easy to increase the size of the panel.

In addition, since the present invention uses AC auxiliary discharge, the light emission during auxiliary discharge is small and the contrast can be increased, and furthermore, since the area where charge accumulates during auxiliary discharge is regulated,
Stable auxiliary discharge characteristics and a large sustaining pulse margin can be obtained at the same time.

In particular, when the dielectric surface is recessed, it is less susceptible to the effects of cathode sputtering, so the auxiliary discharge characteristics become stable. Also, at this time, the auxiliary discharge is completely confined within the depression, so the contrast becomes large. This effect becomes noticeable when colorizing.

[Brief explanation of drawings]

1, 2, and 3 respectively show a perspective view, a sectional view, and a plan view (only the back plate) of the panel structure of the first embodiment of the present invention, and FIG. 4 shows the second embodiment of the present invention. FIG. 5 shows a perspective view of a conventional panel structure, and FIG. 6 is a plan view of a panel in which the display cell arrangement in the first embodiment panel is changed to a staggered arrangement. Figure 7 shows an experimental example of the relationship between the ratio of the area of the exposed dielectric layer to the area of the cathode and the auxiliary pulse voltage, and Figure 8 shows the ratio of the area of the exposed dielectric layer to the area of the cathode. An experimental example of the relationship between and sustain pulse voltage is shown. FP...Front plate RP...Rear plate DC/
... Display cell SC ... Auxiliary cell B ... Partition wall PT ... Priming path DA ...
・Display anode group SA...Auxiliary anode group PD...
Auxiliary electrode group KD...Cathode group AD...Anode group WD...Intermediate electrode group DL, DL,,
DL2...Dielectric layer Fig. 1 11! 1's diagonal diagonal of the 1 panel structure Fig. 2 1 f (nTe rotation JL1f) 'Iff face mouth D Fig. 3 Award f of Lecture 1 - Example Plan of Kashihiko (Karihiko IL) Fig. 6 ≠ 10 Modified stop of I1 1 (star bank 0 and row) Fig. 4 Cross-sectional entrance of 20 Tsutsui I1 structure No. 5F ffJv1 Rino: 1if ) Z44!1mC ,5C Ratio f (%) of IiD head in Figure 7

Claims (1)

[Scope of Claims] 1. A two-piece gas discharge display panel consisting of a front plate and a back plate, wherein the back plate is provided with a single or a plurality of mutually parallel first electrodes, and a dielectric material. and a plurality of mutually parallel second electrodes that are parallel or perpendicular to the first electrode are sequentially laminated and deposited, and the front plate is placed on the plate with a plurality of mutually parallel second electrodes that are perpendicular to the second electrodes. At the base of the display cell, which is constructed by depositing a plurality of third electrodes and disposing partition walls so as to include the second electrode at the base, the dielectric cell has the first electrode directly below. The exposed area of the body layer exposed to the display cell is 15% of that of the second electrode.
80%. 2. At the base of the display cell, a step is provided between the surface of the second electrode and the exposed surface of the dielectric layer having the first electrode directly below, and the exposed portion of the dielectric layer is depressed. The gas discharge display panel according to claim 1, characterized in that it has a structure. 3. The gas according to claim 1 or 2, characterized in that a plurality of mutually parallel fourth electrodes are provided between the first electrode and the second electrode, parallel to or perpendicular to the second electrode. Discharge display panel.