JP2001125070A - Plasma address display device and driving method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce driving voltage without impairing the writing characteristics of a picture signal and the stability of plasma discharge in an AC type plasma address display device. SOLUTION: This plasma address display device is provided with a panel 0, a scanning circuit 22 and a signal circuit 21. The panel 0 has a laminated structure in which display cells provided with signal electrodes Ys and plasma cells provided with row discharge channels 5 are stacked. At least two lines of discharge electrodes ( for example, X1-1, X2) which are coated with an insulating film are assigned to each discharge channel 5. the scanning circuit 22 performs the line sequential scanning of plasma cells by applying driving pulses having the same polarity successively to the two lines of discharge electrodes X1, X2 assigned to each discharge channel 5 and by exciting plasma discharge while utilizing the dielectric properties of insulating films. The signal circuit 21 displays a picture by applying signal voltages to respective signal electrodes Ys in synchronism with the line sequential scanning.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma addressed display device using a flat panel in which a display cell and a plasma cell are stacked. More specifically, the present invention relates to a technique for reducing the drive voltage of an AC drive type plasma cell.

[0002]

2. Description of the Related Art An AC drive type plasma addressed display device is disclosed in, for example, Japanese Patent Application Laid-Open No. 8-304792, and its structure is shown in FIG. The plasma addressed display device has a flat panel structure including a display cell 1 and a plasma cell 2 and a common intermediate sheet 3 interposed therebetween. The intermediate sheet 3 is made of an extremely thin plate glass or the like and is called a micro sheet. The plasma cell 2 is composed of a lower glass substrate 4 bonded to the intermediate sheet 3,
A dischargeable gas is sealed in the gap between the two. The inner surface of the lower glass substrate 4 has a stripe-shaped discharge electrode X
1, X2 are formed. In the case of the AC drive type, the discharge electrodes X1 and X2 are covered with an insulating film 6. Set the discharge electrode to X
The partition walls 7 are formed so as to partition one by one like X1, X2, and the gap filled with the dischargeable gas is divided to form the discharge channel 5. In the discharge channel 5 surrounded by the pair of partition walls 7, the discharge electrodes X1 and X having opposite polarities are opposite to each other.
2 and a plasma discharge is generated.

On the other hand, the display cell 1 is configured using a transparent upper glass substrate 8. The glass substrate 8 is bonded to the other surface of the intermediate sheet 3 with a sealing material or the like via a predetermined gap, and a liquid crystal 9 is sealed in the gap as an electro-optical material. A signal electrode Y is formed on the inner surface of the upper glass substrate 8. Matrix pixels are formed at the intersections of the signal electrodes Y and the discharge channels 5.
A color filter 13 is also provided on the inner surface of the glass substrate 8, and for example, three primary colors of RGB are assigned to each pixel.
The flat panel having such a configuration is of a transmission type, for example, in which the plasma cell 2 is located on the incident side and the display cell 1 is located on the emitting side. A backlight 12 serving as a light source is attached to the plasma cell 2 side.

In the plasma addressed display device having such a configuration, a row-shaped discharge channel 5 in which plasma discharge is performed is switched in a line-sequential manner and scanned, and an image is applied to a column-shaped signal electrode Y on the display cell 1 side in synchronization with the scanning. Display driving is performed by applying a signal. Discharge channel 5
When an AC plasma discharge is generated inside, the inside is almost uniformly at the ground potential, and pixel selection is performed for each row. That is,
One discharge channel 5 corresponds to one scanning line and functions as a sampling switch. When an image signal (signal voltage) is applied to each signal electrode in a state where the plasma sampling switch is turned on, sampling is performed and lighting or extinguishing of the pixel can be controlled. Even after the plasma sampling switch is turned off, the image signal is held in the pixel as it is. The display cell 1 performs image display by modulating incident light from the backlight 12 into outgoing light in accordance with an image signal.

[0005] Unlike the DC type, in the AC type, a pair of discharge electrodes X 1 and X 2 are covered with an insulating film (dielectric) 6.
A pair of discharge electrodes X1, X assigned to each discharge channel 5
2 is applied sequentially to excite an AC plasma discharge utilizing the dielectric property of the insulating film 6 to perform line sequential scanning of the plasma cell 2. The plasma discharge excited in each discharge channel 5 stops when the insulating film 6 is charged with the charged particles. The AC plasma discharge can be controlled autonomously by charging and discharging the dielectric, and the discharge charge amount is smaller than that of the DC plasma discharge, and the deterioration of the plasma cell 2 is suppressed accordingly.

In order to clarify the background of the present invention, referring to FIG. 7, the AC of the plasma addressed display shown in FIG.
The plasma discharge operation will be specifically described. (1) shows a voltage waveform of a drive pulse applied to one discharge electrode X1. Note that the other discharge electrode X2 is kept at the ground potential. This voltage waveform changes, for example, from the reference potential (ground potential) by −400 to −500 V at time TF, and returns to the reference potential at time TR. The pulse width between TF and TR is, for example, about 10 μs. (2) shows the waveform of the discharge current flowing through the discharge channel 5 in response to the drive pulse. The first discharge occurs almost in synchronization with the fall of the drive pulse in the TF, and the discharge current P1 flows. Since the discharge current P1 stops flowing when the capacitance of the insulating film 6 is charged, the discharge charge can be suppressed autonomously. Subsequently, a second discharge occurs substantially in synchronization with the rise of the drive pulse in the TR, and a discharge current P2 flows. Since the discharge current P2 stops flowing when the electric charge charged in the insulating film 6 is discharged, the plasma discharge can be similarly controlled autonomously. (3) shows a change in the surface potential of the insulating film 6 which changes in response to a drive pulse applied to the discharge electrode X1. The first discharge current P1 substantially in accordance with TF
Flows, the insulating film 6 is charged, and its surface potential returns from the negative side to the reference potential. Thereafter, the driving pulse is T
Since the potential returns to the reference potential at R, the surface potential of the insulating film 6 rises and swings largely toward the positive side. As a result, a discharge in the opposite direction occurs between the adjacent grounded discharge electrode X2 and a discharge current P2 flows. The charge charged in the insulating film 6 is discharged by the discharge current P2, and the surface potential of the insulating film 6 shown in (3) returns to the reference potential (ground potential). As is apparent from the above description, in the AC plasma discharge type, plasma discharge occurs twice in both directions by using the capacitance of the insulating film 6. (4) shows the waveform of the image signal applied to the signal electrode Y in synchronization with the driving pulse. As is clear from the figure, the data (signal voltage) of the image signal is written to the corresponding pixel when the second discharge is completed.

[0007]

In the above-mentioned conventional AC-type plasma addressed display device, the voltage of the drive pulse applied to the discharge electrode reaches an absolute value of 400 V to 500 V, and the circuit structure must have a high breakdown voltage. this is,
This is a major impediment to making the scanning circuit an IC. In addition, in order to suppress the drive voltage from increasing as much as possible, the selection range of ionizable gas types to be sealed in the plasma cell has been limited. If the driving voltage is simply reduced to near the discharge starting voltage, the writing characteristics of the image signal to the display cell deteriorate, and the plasma discharge also becomes unstable. Accordingly, it is an object of the present invention to reduce the driving voltage without impairing the writing characteristics of the image signal and the stability of the plasma discharge.

[0008]

The following means have been taken in order to solve the above-mentioned problems of the prior art and achieve the object of the present invention. That is, the plasma addressed display device according to the present invention,
It has a stacked structure in which display cells with column-shaped signal electrodes and plasma cells with row-shaped discharge channels are stacked, and each discharge channel is assigned at least two discharge electrodes covered with an insulating film. Line and sequential scanning of the plasma cell by sequentially applying drive pulses of the same polarity to the panel and the two discharge electrodes assigned to each discharge channel and exciting the plasma discharge using the dielectric properties of the insulating film. And a signal circuit for applying a signal voltage to each signal electrode of the display cell and displaying an image in synchronization with the line-sequential scanning. In one embodiment, each discharge channel is separated by parallel barriers formed on the substrate, and one discharge electrode is disposed under one barrier and protrudes on both sides thereof, Are shared by two discharge channels separated from each other by the partition. Further, the discharge electrode is formed by laminating a transparent conductive layer protruding on both sides from below the partition and a metal layer limited only under the partition.

The present invention also includes a driving method of the above-described plasma addressed display device. That is, it has a laminated structure in which display cells having column-shaped signal electrodes and plasma cells having row-shaped discharge channels are stacked, and each discharge channel has at least two discharge electrodes covered with an insulating film. In a method of driving a plasma addressed display device using an assigned panel, a driving pulse of the same polarity is sequentially applied to two discharge electrodes assigned to each discharge channel, and a plasma discharge is performed by utilizing a dielectric property of the insulating film. And a step of applying a signal voltage to each signal electrode of the display cell to display an image in synchronization with the line-sequential scanning. .

According to the present invention, in an AC-type plasma addressed display device, at least two discharge electrodes are sequentially driven in time series for each discharge channel. Specifically, pulses of the same polarity with respect to the ground potential are sequentially applied.
Preliminary discharge is performed at the first drive pulse, and main discharge is performed at the next pulse to achieve a reduction in drive voltage. Rather than generating two plasma discharges at the rise and fall of one pulse as in the related art, two plasma discharges are generated by two drive pulses applied sequentially. The preliminary discharge generated by the first drive pulse is relatively weak, and its main purpose is to accumulate the charge generated by the plasma discharge on the dielectric surface on the discharge electrode. When the next drive pulse is applied, the electric field due to the charge accumulated in the dielectric and the electric field due to the applied drive pulse are superimposed, and a strong full-scale discharge is generated. The image signal is written into the display cell mainly at the timing when the second plasma discharge occurs. As described above, by generating the second plasma discharge using the first accumulated charge, it is possible to reduce the driving voltage by almost half compared to the related art.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of a plasma addressed display device according to the present invention.
As shown in (A), the plasma addressed display device includes a panel 0, a signal circuit 21, a scanning circuit 22, and a control circuit 23. Panel 0 includes a plasma cell having discharge channels 5 arranged in rows and a signal electrode Y arranged in columns.
It has a stacked structure in which display cells having 1 to Ym are overlapped with each other. The pixels 11 are defined at the intersections of the discharge channels 5 arranged in rows and the signal electrodes Y1 to Ym arranged in columns. Each discharge channel 5 has at least two discharge electrodes X1, X2, X3, X4 covered with an insulating film.
X5, X6,... Xn-1, Xn are respectively assigned. The scanning circuit 22 has two discharge electrodes (for example, X) assigned to one discharge channel 5 via a buffer.
1, X2) are sequentially applied, and the plasma discharge is excited by utilizing the dielectric property of the insulating film, thereby performing line sequential scanning of the plasma cell. On the other hand, the signal circuit 21
Are synchronized with this line-sequential scanning, each signal electrode Y of the display cell.
A signal voltage is applied to 1 to Ym via a buffer to display an image. The control circuit 23 controls the synchronization of the signal circuit 21 and the scanning circuit 22.

FIG. 2B shows a state in which each scanning electrode X
1, X2, X3, X4, X5,... Are shown. The pair of discharge electrodes X1 and X2 are assigned to the first discharge channel 5, and the discharge electrodes X
3, X4 are assigned to the next discharge channel 5.
In the first horizontal scanning period (1H), a driving pulse of negative polarity is applied to the discharge electrode X1 from the ground potential, and subsequently, the same polarity is applied to other discharge electrodes X2 belonging to the same discharge channel 5 within the same horizontal scanning period. Are applied. In the next horizontal scanning period, drive pulses of the same polarity are sequentially applied to the pair of discharge electrodes X3 and X4. Similarly,
Line sequential scanning of the discharge channel 5 is performed. In the present embodiment, a negative drive pulse is applied to each discharge electrode, but a positive drive pulse may be used instead.

FIG. 2 is a schematic partial sectional view showing a specific structure of panel 0 shown in FIG. As shown in the drawing, the AC-driven plasma addressed display device is partitioned by partitions 7 parallel to each other on the glass substrate 4 on the back side, and is supported by the partitions 7 so as to be parallel to the substrate 4 on the back side. And a discharge channel 5 hermetically sealed by the intermediate sheet 3. A peripheral portion (not shown) of the intermediate sheet 3 is sealed with respect to the rear substrate 4 by, for example, a frit seal material, and the space between the intermediate sheet 3 and the rear substrate 4 is sealed. The closed space is filled with a discharge gas. Also, intermediate sheet 3
Is mounted with a front substrate 8 provided with a signal electrode Y. The signal electrode Y is formed on the rear surface of the front substrate 8. Liquid crystal 9 is filled between the front substrate 8 and the intermediate sheet 3 to form a liquid crystal layer.

The discharge channel 5 is provided with a pair of discharge electrodes X1 and X2 covered with a dielectric film 61. A reference electrode 19 is provided at an intermediate portion of the partition wall 7. Each of the discharge electrodes X1 and X2 has a laminated structure of a wide transparent electrode 51 and a narrow bus electrode 52. The transparent electrode 51 is made of, for example, ITO and has a thickness of several hundred nm. On the other hand, the bus electrode 52 is made of, for example, Cr / Cu
/ Cr laminated structure. Since the bus electrode 52 is formed of an opaque metal film, its width and position are restricted from an optical point of view. This is because the opaque bus electrode 52 reduces the aperture ratio. In addition, a predetermined signal voltage is not applied to the liquid crystal 9 to the partition 7 and its vicinity. Therefore, it is desirable that the partition 7 and the vicinity thereof be shielded from light. Therefore, from an optical point of view, it is desirable that the bus electrode 52 be provided at a position where the vicinity of the partition wall 7 can be shielded from light. That is, in one discharge channel 5, the bus electrode 52 is provided at a position close to the partition 7, and the transparent electrode 51 extends to the center of the discharge channel 5.

In the case of a transmissive display device, the dielectric film 61 must be formed of a transparent material. The dielectric film 61 made of a transparent material can be formed by a method of forming a low-melting glass paste by screen printing or a method of depositing a low-melting glass powder on an electrode surface by an electrodeposition method. On the dielectric film 61, a MgO film 62 which is a functional film
Is provided. As described above, in the AC drive type, the surfaces of the discharge electrodes X1 and X2 are not exposed, and the dielectric film 61
The discharge when the MgO film 62 is present is a so-called AC plasma discharge. That is, when the drive pulse applied between the pair of discharge electrodes X1 and X2 exceeds the discharge start voltage and discharge starts, the capacitance of the dielectric film 61 is charged by the discharge electrodes.

Referring to FIGS. 3 and 4, the operation of the plasma addressed display device according to the present invention will be described in comparison with a conventional driving method. FIG. 3 schematically shows a conventional driving method. As described with reference to FIG. 7, two discharges are generated by a single pulse. As shown in the drawing, a pulse of the driving voltage Vo is applied to one discharge electrode X1, while the other discharge electrode X2 is kept at the ground level GND. The first plasma discharge occurs at the falling edge TF of the pulse, and the second plasma discharge occurs at the rising edge TR. In this operation, each discharge electrode X1, X2
Are represented by PX1 and PX2. The surface potential PX1 is synchronized with the fall TF of the drive pulse.
Drops by the potential difference Vo. Here, the first plasma discharge occurs, and the dielectric covering X1 is charged with electric charge, so that the potential of PX1 gradually increases by Vc. In accordance with this, the surface potential PX2 of the discharge electrode X2 on the other side gradually decreases by Vc from the level before the discharge. As a result, PX1 and PX2 approach each other, and the potential difference between them becomes V.
r. Note that the potential of PX2 before discharging is changed to PX1
The potential is represented by Vs for easy comparison. After this,
When the potential of X1 returns to GND at the rising TR of the drive pulse, PX1 rapidly rises in accordance with this. Here, a second discharge occurs between X1 and X2. Due to this discharge, PX1 drops by Vc while PX2
Rises by Vc. Therefore, when the second plasma discharge ends, the potential difference between PX1 and PX2 is also Vr. As described above, the voltage of the drive pulse is Vo, the surface potential difference at the end of discharge is Vr,
Assuming that a potential change due to discharge is Vc, Vo = 2Vc + 2
Vr. Here, assuming that the potential difference before discharge is Vs,
Vs = Vo-Vr. Therefore, Vo = Vs + Vr.

FIG. 4 is a schematic diagram of a driving method according to the present invention. Focusing on one discharge channel, first, a drive pulse of voltage level Vo is applied to one discharge electrode X1, and then the same voltage level V is applied to the other discharge electrode X2.
o drive pulse is applied. At this time, the surface potential PX1 of the discharge electrode X1 and the surface potential PX2 of the discharge electrode X2 change as shown. To facilitate understanding, parts corresponding to the graphs shown in FIG. 3 are denoted by corresponding reference numerals. First, the falling TF of the pulse applied to X1
Then, PX1 drops by Vo. Here, the first preliminary discharge occurs, and PX1 rises by Vc. In accordance with this, PX2 also drops by Vc. Therefore, the surface potentials of the pair of discharge electrodes approach each other, and the potential difference becomes Vr. Here, when the pulse applied to X1 returns to GND at TR, PX1 rises sharply by that amount.
However, since Vo is set relatively small, PX
The potential difference between 1 and PX2 does not exceed the voltage required for discharge (discharge start voltage), and no plasma discharge occurs.
Next, when a pulse is applied to X2, its falling T
At F, PX2 drops sharply by Vo. Accordingly, the surface potential difference between the two electrodes X1 and X2 rapidly increases as shown in the figure, and exceeds the discharge starting voltage, so that a second full-scale plasma discharge is generated. This discharge causes PX2 to rise by Vc, and PX1 also falls by Vc. As a result, the surface potential difference becomes Vr. After this, X2
Rises to the GND at the rising TR, PX2 rises by Vo. After this, finally P
The difference between X2 and PX1 is Vc.

As is apparent from the above description, Vo = Vc
+ Vr. Further, Vs = Vo + Vc. Therefore,
Vs = 2 × Vo−Vr. Therefore, Vo = (Vs +
Vr) / 2. On the other hand, Vo = Vs + Vr in the conventional example shown in FIG. Therefore, according to the present invention, it is possible to halve the voltage level of the driving pulse as compared with the related art.

FIG. 5 is a schematic view showing another embodiment of the plasma addressed display device according to the present invention. In this embodiment, the discharge electrode is shared by the discharge channels adjacent to each other, thereby simplifying the structure and improving the aperture ratio. As shown in (A), the present plasma addressed display device has a display cell 1 provided with a column-shaped signal electrode Y and a row-shaped discharge channel 5n separated from each other by a partition wall 7.
It has a stacked structure in which a plasma cell 2 having −1, 5n, and 5n + 1 is stacked. The display cell 1 and the plasma cell 2 are joined to each other via an intermediate sheet (microsheet) 3 made of an extremely thin glass plate or the like. The display cell 1 is constituted by using the upper glass substrate 8, and the signal electrodes Y in a row are formed on the inner surface thereof as described above. This signal electrode Y is made of a transparent conductive film such as ITO. The upper substrate 8 and the intermediate sheet 3 are bonded to each other via a predetermined gap, and a liquid crystal 9 is held in the gap as an electro-optical material. The lower plasma cell 2 is formed using a glass substrate 4 and is joined to the intermediate sheet 3 via a predetermined gap. The gap between the two is partitioned by the partition wall 7 as described above, and the discharge channels 5n−1,
5n and 5n + 1 are formed. Note that each discharge channel is filled with an ionizable gas. The gas comprises an inert element such as helium, neon, argon, krypton, xenon, or a mixture thereof.

Each discharge channel is assigned a pair of discharge electrodes covered with an insulating film 6. For example, the discharge channel 5n-1 has a pair of discharge electrodes Xn-1 and Xn-2.
Is assigned. The next discharge channel 5n is assigned a pair of discharge electrodes Xn and Xn-1. still,
The insulating film 6 covering each discharge electrode X has a two-layer structure, and a dielectric layer 61 made of SiO ₂
The protective layer 62 made of O or the like is overlapped. Both layers are dielectric, but the upper protective layer 62 is provided to protect the lower dielectric layer 61 from plasma particles. The plasma cell 2 is of an AC plasma discharge type, in which a discharge voltage is sequentially applied to a pair of discharge electrodes assigned to each discharge channel, and an AC plasma discharge is excited by utilizing the dielectric properties of the insulating film 6. 2 is performed. In synchronization with the line sequential scanning, a signal voltage is applied to each signal electrode Y of the display cell 1 to perform image display.
As a feature, one discharge electrode is arranged under one partition 7 and protrudes on both sides thereof, and one discharge electrode is shared by two discharge channels separated from each other by the partition 7. I have. For example, as shown in FIG.
-1 is located below the corresponding partition 7 and protrudes on both sides thereof. That is, the discharge electrode Xn-1 is shared by the two discharge channels 5n and 5n-1 separated from each other by the partition wall 7. Similarly, the discharge electrodes Xn correspond to the corresponding partition walls 7.
Discharge channels 5n + 1,5n separated from each other by
It is shared by. In this embodiment, each discharge electrode X
Has a laminated structure in which a transparent conductive layer 51 protruding from both sides from below the partition 7 and a metal layer 52 (bus electrode) limited only below the partition 7 are stacked. The transparent conductive layer 51 is made of ITO
Even if it protrudes outward from the partition wall 7, it is transparent and does not affect the aperture ratio of the display device. However, since the electrical resistance of the transparent conductive layer 51 is higher than that of a normal metal, a metal layer 52 is superposed on the transparent conductive layer 51 as a bus electrode to compensate for this. The metal layer 52 is made of, for example, aluminum and is opaque, but is limited to the bottom of the partition 7 which does not originally function as an effective opening of the pixel, and there is no problem. By using a discharge electrode having such a laminated structure, the aperture ratio of a pixel can be maximized.

Referring to (B), (C) and (D),
The operation of the plasma addressed display device shown in FIG. First, as shown in (B), when a drive pulse is applied to the discharge electrode Xn-1 according to the line-sequential scanning, the discharge electrode Xn-1 is located to the right of the discharge electrode Xn-1 and at the ground potential via the insulating film 6 via the insulating film 6. An AC plasma discharge occurs. Thereby, the discharge channel 5n-1 is in the selected state. At the same time,
An AC plasma discharge is also generated between the discharge electrode Xn located on the left and also at the ground potential, and the discharge channel 5n is selected. That is, in this embodiment, since each discharge electrode is shared by adjacent discharge channels, for example, the discharge electrode X
When a selection pulse is applied to n−1, two discharge channels 5
n-1 and 5n are simultaneously selected. Image signals are written to two scanning lines corresponding to the selected two discharge channels. When the line-sequential scanning proceeds one line ahead, as shown in FIG. 3C, a selection pulse is applied to the next discharge electrode Xn, and the discharge electrodes Xn−1 and Xn + 1 on both sides thereof become the ground potential. As a result, the two discharge channels 5n, 5n
+1 is selected, and the next image signal is written to the corresponding scanning line. As is clear from the comparison between (B) and (C), the discharge channel 5n continuously generates the plasma discharge twice, but the image signal written first depends on the image signal written second. Since the image signal is immediately erased, the image signal is sequentially written to one scanning line by the line sequential scanning. When the line-sequential scanning is further advanced by one line, as shown in (D), a selection pulse is applied to the discharge electrode Xn + 1, and a second plasma discharge is generated in the discharge channel 5n + 1, at which point the original image signal is written. .

[0022]

As described above, according to the present invention,
In a plasma addressed display device, a pair of discharge electrodes covered with a dielectric are formed in one discharge channel, and these discharge electrodes are sequentially driven in time series. At this time, the drive voltage can be almost halved by sequentially applying drive pulses of the same polarity. By reducing the driving voltage in this manner, it is possible to reduce the manufacturing cost of the circuit configuration including the scanning circuit.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of a plasma addressed display device according to the present invention.

FIG. 2 is a partial cross-sectional view showing a specific configuration of a panel included in the embodiment shown in FIG.

FIG. 3 is a reference diagram for explaining the operation of the plasma addressed display device.

FIG. 4 is a schematic diagram for explaining the operation of the plasma addressed display device shown in FIG. 1;

FIG. 5 is a schematic view showing another embodiment of the plasma addressed display device according to the present invention.

FIG. 6 is a sectional view showing a conventional plasma addressed display device.

FIG. 7 is a waveform chart for explaining the operation of the plasma addressed display device shown in FIG. 6;

[Explanation of symbols]

0 ... panel, 1 ... display cell, 2 ... plasma cell, 5 ... discharge channel, 6 ... insulating film, 7 ...
Partition, 9 liquid crystal, 11 pixel, 21 signal circuit, 22 scanning circuit, 51 transparent conductive layer,
52: metal layer, 61: dielectric layer, 62: protective layer, X: discharge electrode, Y: signal electrode

Claims (4)

[Claims] The present invention has a laminated structure in which a display cell having a column-shaped signal electrode and a plasma cell having a row-shaped discharge channel are stacked, and each discharge channel has at least two lines covered with an insulating film. A plasma cell by sequentially applying a drive pulse of the same polarity to a panel to which discharge electrodes are assigned and two discharge electrodes assigned to each discharge channel to excite a plasma discharge using the dielectric property of the insulating film. And a plasma address display device for applying a signal voltage to each signal electrode of a display cell to display an image in synchronization with the line sequential scanning. 2. Each of the discharge channels is separated by parallel partitions formed on the substrate, and one discharge electrode is arranged below one partition and protrudes on both sides thereof. 2. The plasma addressed display device according to claim 1, wherein the two discharge electrodes are shared by two discharge channels separated from each other by the partition. 3. The discharge electrode according to claim 2, wherein the discharge electrode is formed by laminating a transparent conductive layer protruding on both sides from below the partition and a metal layer limited only under the partition. Plasma address display device. 4. A stacked structure in which display cells provided with column-shaped signal electrodes and plasma cells provided with row-shaped discharge channels are stacked, and each discharge channel has at least two electrodes covered with an insulating film. In a method of driving a plasma addressed display device using a panel to which discharge electrodes are assigned, a drive pulse of the same polarity is sequentially applied to two discharge electrodes assigned to each discharge channel, and a dielectric property of the insulating film is used. A step of performing line sequential scanning of the plasma cell by exciting the plasma discharge, and a step of displaying a picture by applying a signal voltage to each signal electrode of the display cell in synchronization with the line sequential scanning. A method for driving a plasma addressed display device.