JPH0737513A - Gas discharge panel and drive method thereof - Google Patents

Abstract

PURPOSE:To increase the margin of maintaining voltage and also improve efficiency by coating a first auxiliary electrode by an insulating layer and providing partitioning walls for separating respective cells and also the exposed part of the electrode and a negative electrode onto the reverse side in the respective cells. CONSTITUTION:Plural belt-shaped electrodes 2 arranged in parallel and positive electrodes 4 branched via resistance filaments 3 every respective cells from these electrodes are formed on a front substrate 1. Then transmittable insulating layers 5 concealing the electrodes and the resistance filaments are formed, and thereon phosphor layers PR, PG, and PB are formed as the transmittable insulating layers 6. While an insulating layer 8 is formed on a back substrate 7, thereon n belt-state negative electrodes 9 three-dimensionally diagonal to the electrodes 2 and auxiliary electrodes 10 and 11 are formed, and an insulating layer 12 is formed on the auxiliary electrodes 10 and 11. Moreover paste having a main component of phosphor as an insulating layer is sorted every cell to be printed on the upper parts of the insulating layer 12 and 8 to be baked, forming phosphor layers PR, PG, and PB. Then partitioning walls 14 are formed to enclose given gas into a space part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct current type gas discharge panel and a driving method for displaying characters, figures, etc. by utilizing light emission of gas discharge, and more particularly to a positive column type gas discharge panel having a memory function. And how to drive it

[0002]

2. Description of the Related Art In recent years, a gas discharge panel can be made thin, and since it is a flat type, there is no display distortion in the corners and the like, and because there is no flicker, eyes are less likely to tire, and harmful electromagnetic waves such as X-rays are emitted. Since it has no characteristics and has a wide operating temperature range, it has been noticed and partially put into practical use.However, since the brightness is relatively low, it has recently become necessary to increase the brightness especially in the case of color display. A DC type gas discharge panel having a memory function has been proposed as, for example, NHK 33 type PPM panel.

However, in any gas discharge panel,
A write pulse for causing a discharge according to the data of the display image and a sustain pulse for sustaining the started pulse discharge are periodically applied to the display anode, and a scan pulse for performing an auxiliary discharge as a pilot light is applied to the cathode. The erase pulse for controlling the sustain emission period is line-sequentially applied, and if the sustain pulse voltage and the erase pulse voltage are appropriately selected, in the lighting cell, the charged particles of the auxiliary cell are used as priming to write on the anode side. A writing discharge is generated in the display cell by the pulse and the scanning pulse on the cathode side, and after the writing discharge is completed, the charged particles are used as priming for sustaining discharge by the sustaining pulse on the anode side. On the other hand, in the non-lighted cells, since there is no write discharge, the cells are not lighted by the sustain pulse on the anode side.

Therefore, if the voltage of the sustain pulse is increased even in the non-lighted cell, the residual charged particles of the auxiliary discharge and the bleeding of the charged particles of the adjacent cell are used as priming even though there are no residual charged particles due to the write discharge. The sustain voltage cannot be increased because there is a risk of erroneous discharge. Then, there is a possibility that the sustain discharge cannot be performed in the cell (selected cell) where the write discharge is to be performed. . That is, there is a drawback that the voltage margin of the sustain pulse (the voltage range in which stable memory operation is possible) is small.

Further, the control circuit is complicated, for example, the voltage applied to the cathode is set to three stages in order to expand the voltage margin, and two kinds of pulses, that is, a write pulse and a sustain pulse, are applied to the display anode. Therefore, the control circuit was inevitably complicated.

Moreover, since both the writing discharge and the sustaining discharge utilize glow discharge, there are drawbacks such as low luminous efficiency. The present invention has been made in view of the above circumstances, and an object thereof is to provide a gas discharge panel having a high margin of a sustain voltage and an improved efficiency.

[0007]

In the gas discharge panel of the present invention, a plurality of strip-shaped electrodes arranged in parallel on the front substrate and the electrodes are branched from each of the cells via a resistance wire. An anode is further provided, and an insulating layer for covering at least the strip-shaped electrode and the resistance wire is provided, and a strip-shaped cathode and a strip-shaped first auxiliary electrode are provided on the back substrate directly or through the insulating layer.
The auxiliary electrode of is provided so as to be three-dimensionally orthogonal to the electrode,
The first auxiliary electrode is covered with at least an insulating layer and a partition wall for separating each cell is provided, and the exposed portion of the electrode and the cathode are provided on opposite sides in each cell, or the front substrate is provided with a plurality of strips. Electrodes are provided in parallel, a transparent insulating layer is provided on the electrodes so that a part of the electrodes is exposed, and a strip-shaped cathode and a strip-shaped first auxiliary are provided on the back substrate directly or through the insulating layer. An electrode and a second auxiliary electrode are provided so as to be three-dimensionally orthogonal to the electrode, the first auxiliary electrode is covered with at least an insulating layer, a partition wall for separating each cell is provided, and an exposed portion of the electrode is provided. The cathode is provided on the opposite side in each cell, and it is preferable that the gas discharge panel is driven separately in the writing period and the sustaining period.

[0008]

In the panel of the present invention, trigger setting is performed between the first auxiliary electrode and the second auxiliary electrode before the writing period, and when the cathode is selected, the trigger setting is performed between the cathode and the first auxiliary electrode. Since the trigger discharge is generated and the priming of the writing discharge is performed, the writing discharge voltage can be lowered, and by applying a negative voltage to the first auxiliary electrode and the second auxiliary electrode after the writing period, in the non-selected cells. Since positive charged particles near the cathode generated by the trigger discharge can be moved away, it is possible to increase the sustain pulse voltage margin without causing erroneous discharge even if the sustain pulse voltage is increased. Although the charged particles are moved away, the sustain discharge is surely generated by the sustain pulse voltage due to the priming due to the discharge during writing.

Further, both the writing discharge and the sustaining discharge are performed by the positive column discharge between the anode and the cathode, so that the luminous efficiency is increased. Since the AC discharge is used between the first auxiliary electrode and the second auxiliary electrode, which are insulated as the priming of the writing discharge, the brightness of the non-selected cell becomes low, and the brightness ratio (contrast) with the selected cell. Is high.

Further, since the distance between the first auxiliary electrode and the second auxiliary electrode is short, trigger setting can be performed with a low voltage. Further, by separately driving the writing period and the sustaining period, priming for the writing discharge is generated by AC discharge before the writing period, so that the priming for the writing discharge can be provided without lowering the contrast. . further,
Writing can be performed with low voltage and high reliability.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. 1, FIG. 2 and FIG. 3 are respectively a partially cutaway perspective view of a gas discharge panel in Example 1 of the present invention, a partial sectional view taken along a line passing through the center of an anode and parallel to an electrode, and a time chart showing a driving method. Is.

FIG. 4 and FIG. 5 are a partially cutaway perspective view of the gas discharge panel in the second embodiment and a partial sectional view taken along a line passing through the center of the cathode and orthogonal to the auxiliary electrode. Example 1 As shown in claim 1, a gas discharge panel in which a first auxiliary electrode and a second auxiliary electrode are branched from an electrode to each cell via a resistance wire and provided on a rear substrate side is illustrated. To do.

As shown in FIGS. 1 and 2, this gas discharge panel has a plurality of strip-shaped electrodes 2 arranged in parallel on a front substrate 1 such as glass, and a resistance strip 3 for each cell from the electrodes. The anode 4 branched via the screen is formed by screen printing and firing with a silver paste, a paste containing ruthenium oxide as a main component, and a paste containing nickel as a main component.

Next, a transparent insulating layer 5 for concealing at least the strip-shaped electrodes and the resistance strips is formed by screen printing and firing with a glass paste, and a transparent insulating layer 6 is formed on the transparent insulating layer 5. Paste containing a fluorescent substance as a main component, a paste containing a fluorescent substance that emits green color as a main component,
The paste containing a phosphor that emits a blue color as a main component is screen-printed and fired separately for each cell to form the phosphor layer P.
_R , P _G and P _B are formed.

On the other hand, an insulating layer 8 is formed on the entire surface of the rear substrate 7 by screen-printing and baking a glass paste, and n pieces of K ₁ to K _n which are three-dimensionally orthogonal to the electrodes 2 are formed thereon. The strip-shaped cathode 9 is formed by a paste containing nickel as a main component, and the first auxiliary electrode 10 and the second auxiliary electrode 11 are formed by screen printing and firing with a silver paste, respectively.
A glass paste is screen-printed and fired on the first and second auxiliary electrodes to form an insulating layer 12, and a phosphor that emits red as an insulating layer 13 is formed as a main component on the insulating layer 12 and on the insulating layer 8. , A paste containing a phosphor that emits green as a main component, and a paste containing a phosphor that emits blue as a main component are screen-printed separately for each cell and baked to form a phosphor layer P _R , Form P _G and P _B.

Next, the partition wall 14 for separating each cell
Is formed by screen printing and baking a glass paste a number of times. Then, the front substrate and the rear substrate are overlapped and sealed, and a gas having a predetermined gas pressure such as He and Xe is filled in the space 15.
To a pressure of 250 Torr to complete the gas discharge panel 16.

The gas discharge panel 1 thus obtained
6 is preferably driven separately in the address period and the sustain period as shown in the time chart of FIG. That is, first, in the address period, the potential −V _{T1 is} applied to the first auxiliary electrode,
By applying a pulse of potential V _S1 to the second auxiliary electrode pole,
A trigger setting is performed by causing a discharge between the auxiliary electrode and the second auxiliary electrode. Next, a scanning pulse having the potential −V _K is applied line-sequentially from the cathodes K ₁ to K _n , while a writing pulse having the potential V _A1 is applied to the anode to be displayed. At this time, a trigger discharge is generated between the insulating layer of the first auxiliary electrode and the cathode immediately before writing, which serves as priming for the writing discharge, and discharge is reliably generated between the selected anode and cathode to perform writing.

When the scanning of the cathode is completed, a pulse having a potential -V _T2 and a potential -V _S2 is applied to the first auxiliary electrode and the second auxiliary electrode to attract cations near the cathode to the second auxiliary electrode. The address period ends, moving away from the cathode.

In the sustain period, a pulse having the potential V _A2 is applied to the anode at regular intervals, and the cells not selected when the potential of each cathode is lowered to −V _KS are not selected in the cells near the cathode due to the movement of the cations. Since the number of charged particles is small, no discharge occurs when the sustain pulse is applied, but in the selected cell, the charged particles due to the write discharge remain near the cathode of the partition wall, so that the sustain pulse (potential V) is generated between the sustain anode and the cathode.
_A2 ) is applied and positive column discharge is performed, and display is performed during the sustain period.

Thus, one frame (16.7 m)
s) is over, and the same procedure is followed. Further, grayscale display can also be performed by configuring one frame into a plurality of subframes, configuring each subframe as described above, and weighting the length of the sustain period binary.

Example 2 As shown in claim 2, a gas discharge panel will be exemplified in which a strip-shaped electrode is provided on the front substrate side, and a first auxiliary electrode and a second auxiliary electrode are provided on the rear substrate side.

As shown in FIGS. 4 and 5, in this gas discharge panel, a transparent conductive film such as ITO or SnO ₂ film is formed by a sputtering method as a strip-shaped electrode 2 arranged in parallel on a front substrate 1 such as glass. It is formed by a method such as a vapor deposition method, and as the translucent insulating layer 6, a paste containing a phosphor emitting red color as a main component, a paste containing a phosphor emitting green color as a main component, and a blue color are formed thereon. The paste containing a fluorescent substance as a main component is screen-printed and fired separately for each cell, and the fluorescent substance layers P _R , P _G and P _B are respectively removed except for a part of the electrode acting as the anode 4. Form.

On the other hand the glass paste screen-printed on the entire surface of the insulating layer 8 on the rear substrate 7, baked to form, thereon from the electrodes 2 and K ₁ sterically orthogonal n this to K _n The strip-shaped cathode 9 is formed by a paste containing nickel as a main component, and the first auxiliary electrode 10 and the second auxiliary electrode 11 are formed by screen printing and firing with a silver paste, respectively.
A glass paste is screen-printed and fired on the first and second auxiliary electrodes to form an insulating layer 12, and a phosphor that emits red as an insulating layer 13 is formed as a main component on the insulating layer 12 and on the insulating layer 8. , A paste containing a phosphor that emits green as a main component, and a paste containing a phosphor that emits blue as a main component are screen-printed separately for each cell and baked to form a phosphor layer P _R , Form P _G and P _B.

Next, a partition wall 14 for separating each cell
Is formed by screen printing and baking a glass paste a number of times. Then, the front substrate and the rear substrate are overlapped and sealed, and a gas having a predetermined gas pressure such as He and Xe is filled in the space 15.
To a pressure of 250 Torr to complete the gas discharge panel 16.

The gas discharge panel thus obtained can be driven by the same method as in Example 1 when the number of cathodes is relatively small, and the same effect can be obtained, but the number of cathodes is reduced. In the case of as many as 400 lines, it is preferable to drive by a conventionally known method in which the address period and the sustain period are not separated, and the sustain discharge is performed after the write discharge.

Although the preferred embodiments have been described above, the present invention is not limited to these, and various applications are possible. Although the full-color display panel has been described in the embodiment, it is of course applicable to a panel for monochromatic color display or a monochrome display not using a phosphor. In the case of monochromatic color display, the translucent insulating layer 6 and the insulating layer 13 are used. The phosphor may be formed continuously without being divided. Further, in the case of such a color display, further providing a phosphor on the inner surface side of the partition wall, the bottom surface of the through hole of the cathode and the like improves the brightness.

In the case of monochrome display, the translucent insulating layer 6 may be formed by continuous screen printing instead of dividing the glass paste instead of the fluorescent material. In this case, the insulating layer 13 is formed. It becomes unnecessary.

When the hollow cathode is provided with a through hole as the cathode, a large number of charged particles due to the write discharge remain in the cell selected for writing, which facilitates discharge with a sustain pulse, which is preferable, but a normal cathode without a through hole is preferable. You may make it a flat structure. In addition to nickel, a metal conductor such as aluminum or an oxide conductor having a perovskite structure can be used as a material.

Regarding the branch from the electrode to the anode in the first embodiment, in the embodiment, all the branched portions are formed by the resistance wire, but the conductive material having the same resistance as the bus electrode and the low resistance is formed up to the middle of the branched portion. You may make it branched by a wire and connect a resistance wire to this.

Regarding the insulating layer 8 provided on the rear substrate,
This is preferable because the cathode and the first and second auxiliary electrodes formed thereon can be formed accurately without bleeding, but the insulating layer may be omitted and the cathode and auxiliary electrodes may be formed directly.

Regarding the driving method, it is preferable to drive the address period and the sustain period separately so that the writing can be performed with a low voltage and with high reliability, and the voltage margin of the sustain pulse can be increased. The address period and the sustain period that are conventionally known are not separated,
It is of course possible to drive by a method of performing sustain discharge after writing discharge.

[0032]

According to the gas discharge panel of the present invention, the margin of the sustain voltage can be increased and the luminous efficiency can be improved. Further, when the address period and the sustain period are separately driven, the voltage is low. Writing can be performed with high reliability, erroneous discharge due to sustain pulses can be eliminated, and the voltage margin of sustain pulses can be increased.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a gas discharge panel according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of the gas discharge panel according to the first embodiment of the present invention.

FIG. 3 is a time chart showing a driving method of the gas discharge panel according to the first embodiment of the present invention.

FIG. 4 is a partially cutaway perspective view of a gas discharge panel according to a second embodiment of the present invention.

FIG. 5 is a partial cross-sectional view of a gas discharge panel according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Front Substrate 2 Electrode 3 Resistance Wire 4 Anode 5, 6 Translucent Insulating Layer 7 Rear Substrate 8, 12, 13 Insulating Layer 9 Cathode 10 First Auxiliary Electrode 11 Second Auxiliary Electrode 14 Partition 15 Space 16 Gas Discharge panel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noboru Hiraiwa 1510 Oguchi-cho, Matsusaka-shi, Mie Central Glass Stock Company Technical Center

Claims (3)

[Claims] 1. A front substrate is provided with a plurality of strip electrodes arranged in parallel and an anode branched from the electrodes via a resistance wire for each cell, and further, the strip electrodes and the resistance wire are provided. An insulating layer for hiding at least, and a strip-shaped cathode and a strip-shaped first auxiliary electrode and a second auxiliary electrode are provided on the back substrate either directly or via an insulating layer so as to be three-dimensionally orthogonal to the electrodes, Covering the first auxiliary electrode with at least an insulating layer,
A gas discharge panel having a memory function, characterized in that a partition wall for separating each cell is provided, and an exposed portion of the electrode and a cathode are provided on opposite sides in each cell. 2. A front substrate is provided with a plurality of strip-shaped electrodes in parallel, a transparent insulating layer is provided on the electrodes so that a part of the electrodes is exposed, and a rear substrate is provided with a direct or insulating layer. A band-shaped cathode, a band-shaped first auxiliary electrode, and a band-shaped first auxiliary electrode are provided so as to be three-dimensionally orthogonal to the electrodes, the first auxiliary electrode is covered with at least an insulating layer, and each cell is separated. A gas discharge panel having a memory function, wherein a partition is provided and an exposed portion of the electrode and a cathode are provided on opposite sides in each cell. 3. A method for driving a gas discharge panel, wherein the gas discharge panel according to claim 1 or 2 is driven separately in a writing period and a sustaining period.