JPH0616379B2 - Gas discharge display panel - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a gas discharge display panel, and more particularly to a structure of a two-piece pulse memory drive type discharge display panel including a front plate and a back plate. Is.

(Prior Art) The discharge display panel memory driving method (see Japanese Patent Laid-Open No. 57-86886 “Driving method for gas discharge display panel”) allows a relatively simple panel to have a memory function.
This is a very effective means for obtaining a high-brightness flat panel display device. The latest panel using this driving method is a conventional panel whose perspective view is tightened in FIG.

The prior art panel has a rear plate RP and a front FP as shown in FIG.
The cathode K and the bank P are sequentially formed on the back plate RP by a technique such as thick film printing. On the other hand, the auxiliary anode SA and the display anode DA are formed on the front plate FP by the same printing technique or the like. The periphery of the two substrates is sealed with a sealing material, exhausted, and then a certain amount of gas is sealed.

Further, as can be seen from FIG. 9, the auxiliary cell SC and the display cell
The bank P between DC is lower than the other portions, and forms a passage (called a priming path) through which charged particles and the like from the auxiliary discharge of the auxiliary cell SC diffuse to stabilize and shorten the discharge of the display cell DC. Designed to start on time. In the case of colorization, the display cell DC portion of the front plate FP, the inside of the bank P, the cathode K are partially covered with an insulating material, and the fluorescent material is applied thereon.

(Problems to be Solved by the Invention) However, such a conventional panel is disclosed in Japanese Patent Laid-Open No. 57-86.
Driving by the driving method described in the specification of No. 886 has the following two major problems.

(1) In order to obtain a stable memory function, that is, accurate writing and stable sustain pulse discharge without erroneous discharge, the discharge start voltage depends on the distance between the display anode and the cathode (DA-K). -K distance must be within certain limits. From the experimental results, it is known that the DA-K distance must be within ± several% over the front surface of the panel. If this range is exceeded, erroneous discharge will occur in the periphery of the range, or sustain pulse discharge will not occur, and stable memory operation cannot be obtained for the entire panel. As you can see from Fig. 9, the height of the bank P in this panel
The distance between DA and K is decided. The bank P is usually 100 to several 100 μm, and is formed by thick film printing as described above, but it is not easy to finish it within ± several% over the front surface of the panel.
In particular, the larger the panel becomes, the more difficult it becomes.

(2) In the pulse memory drive method, many display cells D
C is turned on and left unattended. Therefore, a large current flows through the display anode DA, and in extreme cases, the display anode DA.
It is possible that all display cells DC belonging to DA are discharged at the same time. Therefore, an electrode having a large current capacity is required as the display anode DA. This requirement grows as the panel grows. In order to satisfy this requirement, the display anode DA must be thickened. As can be seen from FIG. 9, a thick display anode
DA interferes with the emission of internally generated light and reduces brightness and efficiency.

In addition to FIG. 9, for example, the display anode DA is at the end of the display cell DC,
It is possible to arrange it on the corresponding portion of the upper part of the bank P (in the latter case, it works as an anode bus), but in this case, it is necessary to coat it with a transparent insulator in order to avoid erroneous discharge with adjacent cells. Will increase. Also, the former method is still an obstacle, but especially when the cell pitch becomes small, even if these means are taken, the proportion of the display anode DA or the display anode bus DAL in the display cell DC portion becomes large, and the visible light emission It becomes an obstacle.

An object of the present invention is to eliminate the above-mentioned problems and to perform a stable memory operation even when a discharge panel has a large variable definition and is a gas that effectively emits visible light generated in a display cell to the outside. It is intended to provide a discharge display panel.

(Means for Solving the Problems) In order to achieve the object, the gas discharge display panel of the present invention is a gas discharge display panel having a two-piece structure including a front plate and a back plate, and the back plate is parallel to each other. A display anode bus bar group and a cathode bus bar group are provided, and each electrode of the display anode and the display cathode is projected from each bus bar group at least in a direction orthogonal to them and both electrodes are opposed to each other, and these electrodes are A display cell is constituted by a bank surrounding the periphery, and a write anode group is arranged on the front plate so as to be orthogonal to the display anode bus group and the cathode mother group.

Furthermore, a preferred embodiment of the present invention is characterized in that it comprises an auxiliary cathode branched from the cathode bus bar and arranged on the back plate, and an auxiliary anode arranged on the front plate.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the structure of the first embodiment of the display panel of the present invention.
FIG (a) and (b), (c), (d) is a plan view and B ₁ -B _2, C ₁
-C _2, a D ₁ -D ₂ side cross-sectional view. Cathode bus bar on the rear plate RP
The KL group, the display cathode DK, the auxiliary cathode SK, the display anode bus line AL group, and the display anode DA are formed by a method such as an exposure etching process after forming a film by thick film printing of a metal paste or a thin film manufacturing method. All of these electrodes are preferably formed at the same time, but they can also be formed to some extent in separate steps. After forming the electrodes and the electrode bus bars, the bank P is formed by thick film printing of an insulating paste or the like. The bank P may have a shape in which the distance between the display cell DC and the auxiliary cell SC is lowered as in the conventional example. On the other hand, the auxiliary anode SA and the writing anode WA are formed on the front surface FP by a thick film technique, a transfer printing technique, a thin film technique, or the like. The writing anode WA may be a transparent electrode such as indium tin oxide (ITO). The writing anode WA and the auxiliary anode SA may be formed simultaneously or in separate steps. The above two substrates are superposed as shown in FIGS. 2B, 2C, and 2D, and the periphery is sealed with a sealant and exhausted, and then one or more kinds of rare gases are filled. The display cell of the panel shown in FIG. 1 is shown in FIG.
The relationship between DC, auxiliary cell AC and each electrode is shown in a model.

The operation of the panel of the present invention will be briefly described with reference to FIGS. 1 and 2. The basic driving method is as described in the above-mentioned Japanese Patent Laid-Open Publication. However, the method of applying the write pulse in the same driving method is different in this case, and the write pulse is applied to the write anode.
It is applied to WA ₁ , WA ₂ ... and causes writing discharge between the display cathodes DK ₁ , DK ₂ .... Only sustain pulses are applied to the display anode DA. The operations of the auxiliary cell SC and the cathode are the same as in the case of the driving method described in the above-mentioned Japanese Patent Laid-Open Publication No. Sho. Therefore, writing is performed at almost the same timing as the auxiliary discharge of the auxiliary cell SC, and then the sustain pulse discharge is continued by the sustain pulse of the display anode DA. The write pulse is the write anode WA of the dedicated electrode.
Since only the sustain pulse is applied to the display anode DA, the display anodes DA of the display cells in the two adjacent rows as shown in the drawing are connected to the common display anode bus AL without any problem.

Since only one cell discharge current flows at a time in the writing anode WA and the auxiliary anode SA, the width of these electrodes may be narrow. It is also possible to use a material with a slightly higher resistance, such as a transparent electrode such as ITO. On the other hand display anode bus AL group
The cathode bus KL group is formed on the back plate and has no influence on the emission of visible light, so that it can be made sufficiently thick.

Figure 3, first a modification of the FIG. 1 embodiment in FIG. 4 shown D ₁
Only the corresponding part of the −D ₂ cross section is shown. In the present invention, the display anode bus lines AL group and the cathode bus line KL group are arranged in parallel in the row direction on the back plate RP, so the pitch in the column direction tends to be large.
The structures shown in FIGS. 3 and 4 both attempt to improve these points.

In FIG. 3, the insulator phase IL is formed on the back plate RP except the cathode bus line KL ¹ and the display anode bus line AL ¹ . The formation of the insulator phase IL includes a method of printing a pattern of an insulating paste, a method of printing the paste on the front surface and then pattern etching, and a method of forming a film on the front surface by thin film technology and then etching. After that, the display anode bus AL ¹ and the cathode bus KL ¹ and the display anode DA and the display cathode DK are formed by means such as printing and pouring of a conductive paste. These electrodes may be performed simultaneously or in different steps. After that, the process of forming the bank P is the first
It is similar to the illustrated case.

Also in the case of the fourth illustration, the display anode bus line AL ² , the cathode bus line KL ² , and the insulating layers IL ¹ and IL ² are similarly formed mainly by using the multilayer printing technique. The insulator layers IL ¹ and IL ² have a complicated cross-sectional shape,
Display anode bus AL ² , cathode bus KL ² , display anode DA, display cathode
The DKs are formed in parallel, so I
Even if the shapes of L ¹ and IL ² are deformed, sufficient connection can be secured between each busbar and the electrode. By adopting the shapes shown in FIGS. 3 and 4, the cell pitch in the vertical direction can be reduced while maintaining the large current capacity of the electrode bus bar. It should be noted that although the interelectrode capacitance is increased by narrowing the space between the cathode bus lines KL ^1, the driving method of the pulse memory system does not cause a big problem and can be absorbed by improving the circuit.

FIG. 5 shows a plan view of another modified panel structure of the first embodiment. By changing the shape and position of the writing anode WA as shown in FIG. 5, the emission of visible light is effectively taken out even when an opaque electrode is used. The difference from the prior art is that the writing anode WA and the writing anode bus WAL have a small current capacity as described above, and can be made sufficiently thin.

FIG. 6 shows a panel structure (plan view) of a second embodiment of the present invention. The second embodiment differs from the first embodiment in the auxiliary cell SC.
Not used. The discharge cell C is composed of only the cathode K, the anode A, and the bank P. The panel is basically manufactured by the same method as in the first embodiment. Therefore, Figs. 3 and 4
Modifications similar to those in FIGS. 5 and 5 are also possible. The panel of the second embodiment is disclosed in Japanese Patent Application Laid-Open No. 60-194495 “Driving method of gas discharge display panel” and Japanese Patent Application No. 60-51570 previously filed by the present applicant.
A driving method such as a driving method described in the specification of "gas discharge display panel driving method" can be preferably applied. That is, writing anode WA and cathode K are provided in all or part of the discharge cell.
When a priming condition for writing is best after a certain period of time, an auxiliary discharge is generated between the writing anode WA.
After writing discharge between cathode and cathode K, anode A and cathode K
The pulse discharge is continued by the sustain pulse applied during the period.

In the above description, the priming path between the auxiliary cell SC and the display cell DC or between the discharge cells C has not been mentioned so much, but it is necessary to obtain appropriate priming by forming the bank P into a shape like the conventional example. There is. However, when the operating speed is not a problem, some priming can be obtained through the naturally occurring gap, so that especially the bank P
Does not have to be specially shaped.

Further, in the above embodiments, it is possible to reduce the discharge current by providing a resistance layer between the cathode bus KL and the display cathode DK or the display anode bus AL and the display anode DA in each cell.

The shape and the position of the electrode bus bar of each electrode are not limited to those shown in the drawings described above, and it is natural that they can be arbitrarily changed in the basic cell configuration. Although the bank P is formed on the rear plate RP in the above description, it is not limited to this and may be formed on the front plate FP or may be divided into both. Further, even if the cathode, the cathode bus and the anode, the anode bus are used in reverse, the basic character of the present invention does not change. However, in this case, it is necessary to use the auxiliary anode and the writing anode as cathodes.

Further, as described above, since the same sustain pulse may be applied to the anode bus, these busses may be connected to all or some blocks at the periphery of the panel or the like.
Further, as shown in FIGS. 7 and 8 (both are sectional views of the panel), a common bus line AL ³ is formed under the insulating layers IL ¹ and IL ² (FIG. 7) and IL (FIG. 8), There is also a method of connecting all or some blocks in common with the above anode bus. Although FIGS. 7 and 8 are sectional views corresponding to FIG. 1 (d), it goes without saying that they can be applied to all the panels of the present invention.

The same phenomenon as in the conventional case occurs with respect to the anode-cathode distance of the auxiliary discharge cell of the embodiment of FIG. 1, but the auxiliary discharge generally causes discharge through a resistor, so that the accuracy of this distance does not matter so much.

The panel of the present invention can also be used as a color display panel using a phosphor. Printing on the inside of the front plate FP of the display cell DC and the discharge cell C, the inner wall of the bank P, the rear plate RP, etc.
The fluorescent substance may be applied by an exposure method or the like. Writing electrode
The so-called reflection type in which WA is used as a transparent electrode and a fluorescent material is applied on the inner wall of the bank P and the back plate RP is the most efficient. However, even if a so-called transmissive type in which a fluorescent material is applied to the inside of the front plate FP is used, the width of the writing anode WA and the writing anode bus WAL can be made extremely narrow, so that the brightness is increased.

Although a similar panel structure of the present invention has been announced for a so-called AC type discharge display panel (SI
D Symposium Tech.Papers pp.45-50, 1985), in this case, the electrode busbars are completely divided into two sets, and the pair of electrode busbars constitutes one row of display cells. The bank shape is striped. The present invention clearly differs from the present invention. In particular, the former makes the cell pitch coarse. As in the present invention, there is no means for preventing the pitch from becoming coarse by sharing the anode bus with cells in two adjacent rows.

(Effects of the Invention) In the present invention, since the display anode DA and the cathode K are formed on the back plate RP in a manner opposed to each other, the distance therebetween does not change due to atmospheric pressure as in the prior art. Further, since these electrodes are manufactured by the printing technique and the exposure etching technique, the precision is high. That is, the distance between both electrodes can be formed with high precision.

Further, in the present invention, there is only the write electrode WA in the display cell DC or the discharge cell C portion on the front plate FP. Since only one cell discharge current flows through this electrode, it can be made thin enough, and since a transparent electrode can be used, the visible light generated in the display cell DC and the discharge cell C should not be disturbed. Can be emitted without.

Due to the above improvements, a large and high-definition panel can be realized, and by combining it with the driving methods of the aforementioned prior application, high-speed access is also possible, and a large and high-definition display device such as a high-definition television. Can also be realized.

[Brief description of drawings]

1 (a) and (b), (c), (d) are an exploded plan view and a sectional view of the structure of the first embodiment of the present invention panel, and FIG. 2 is a display cell of the first illustrated panel, The figure which shows the relationship between an auxiliary cell and each electrode modelly, FIG.3, FIG.4 and FIG.5 are each sectional drawing and exploded top view of the modification of 1st Example of this invention, FIG. Inventive Panel An exploded plan view of the structure of the second embodiment, FIGS. 7 and 8 are sectional views of a modification of the second embodiment of the present invention, and FIG. 9 is an exploded perspective view of a panel structure according to a conventional example. . FP: Front plate, RP: Rear plate AL, AL ¹ , AL ² , AL ³ ...... Display anode bus bar DA …… Display anode, KL, KL ¹ , KL ² …… Cathode bus bar DK …… Display cathode, SK …… Auxiliary cathode WA …… Write anode, SA …… Auxiliary anode WAL …… Write anode bus, DC …… Display cell SC …… Auxiliary cell, P …… Bank IL, IL ¹ , IL ² …… Insulator layer, A: Anode K: Cathode, C: Cell

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yuho Kitada 1-10-11 Kinuta, Setagaya-ku, Tokyo Inside the Japan Broadcasting Corporation Broadcasting Technology Laboratory (72) Inventor Yoshimichi Takano 1-10-11 Kinuta, Setagaya-ku, Tokyo Issue Broadcasting Technology Research Institute, Japan Broadcasting Corporation

Claims (2)

[Claims] 1. A two-body gas discharge display panel comprising a front plate and a back plate, wherein display anode busbar groups and cathode busbar groups which are parallel to each other are arranged on the backplate, and each of the busbar groups is At least orthogonally to each of them, each electrode of the display anode and the display cathode is projected and both electrodes are opposed to each other, and a display cell is constituted by these electrodes and a bank surrounding the periphery, and writing is performed on the front plate. A gas discharge display panel, wherein an anode group is arranged orthogonal to the display anode bus group and the cathode bus group. 2. An auxiliary cathode provided on the back plate and branched from the cathode bus, and an auxiliary anode provided on the front plate. A gas discharge display panel according to item.