JP2008257268A - Driving method of gas discharge panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable "progressive driving" of a gas discharge panel sharing display electrodes with two discharge cells adjoining each other in an extension direction of an address electrode. <P>SOLUTION: The gas discharge panel includes a plurality of first electrodes X1, X2, Y1, Y2 arranged on one substrate and covered with a dielectric layer, and a plurality of striped electrodes A arranged on the other substrate, and partition walls 29, 290 for sectioning the two discharge cells C1, C2, C3 sharing the first electrodes from both sides of the striped electrode sections near the positions where the striped electrodes 420 of the first electrodes and the second electrodes intersect. When the gas discharge panel is driven, the amounts of the wall charges of the two discharge cells sharing the first electrodes are set at respectively different levels in the address process. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for driving a gas discharge panel, and more particularly to a method for driving a plasma display panel (hereinafter referred to as PDP).

  Japanese Patent Laid-Open No. 9-160525 discloses a PDP in which electrodes of adjacent cells are made common to reduce the number of electrodes and the number of drive circuits and to enable high definition of the screen. This technique is hereinafter referred to as a conventional example.

  Conventional panel structures are shown in FIGS. The display electrodes (X and Y in FIG. 14, X1 to X5 and Y1 to Y4 in FIG. 15) have the address electrodes (A in FIG. 14 and A1 to A6 in FIG. 15) span two adjacent cells in the extending direction. Is a feature. In other words, a display cell (also referred to as “discharge cell”) is formed between all the display electrodes. By adopting such a structure, one display electrode (X1 to X5, Y1 to Y4 in FIG. 15) corresponds to one display line (L1 to L8 in FIG. 15), and a commonly used PDP (for example, Compared with the PDP shown in FIGS. 1 to 3 of JP-A-10-64434, the number of display electrodes can be reduced to about ½.

The drive waveforms of the conventional example are shown in FIGS. The address and display are performed by “interlace”, and the display lines (L1 to L8 in FIG. 15) are alternately used for the address and display in the even field [(b)] and the odd field [(a)]. [In other words, the combination of the display electrodes (X1 to X5, Y1 to Y4 in FIG. 15) is switched].
JP-A-9-160525

  In the PDP of the conventional example, instead of reducing the number of display electrodes and driving circuits, “interlace driving” as shown in FIGS. 16A and 16B is performed, and “progressive driving” is performed. There was a problem that could not be.

  The present invention solves the above problem in a gas discharge panel in which two adjacent discharge cells share a display electrode in the extending direction of the address electrode (hereinafter, expressed as “up and down” for simplification). An object of the present invention is to provide a structure of a gas discharge panel and a driving method thereof, and to enable “progressive driving”.

  In the conventional example, the reason why progressive driving cannot be performed is that the display electrodes are shared and moved up and down (“up and down” means “in the direction of extension of the address electrodes”, and so on). This is because the sustain discharge cannot be separated. This state is as shown in FIG. 1 (a) illustrating the EE cross section of FIG. 14 (conventional example).

  On the other hand, in the present invention, as shown in the cross-sectional view of FIG. 1B, the address discharge and the sustain discharge are separated at the central portion of each display electrode shared by two vertically adjacent discharge cells. There is a first feature (a feature in the structure of the gas discharge panel) in the configuration having the partition walls.

  By configuring the gas discharge panel in this way, it is possible to separate the address discharge and the sustain discharge between two discharge cells that are adjacent to each other up and down while sharing the display electrode.

  The term “partition wall” as used herein refers to a structure that suppresses “coupling between adjacent discharge cells” (specifically, coupling based on discharge coupling, flow of charged particles, flow of excited molecules and excited atoms, etc.). It points to. The present invention is not limited to the case of partitioning so as not to have a gap, and includes a structure having an effect of suppressing coupling between discharge cells even if there is a gap or a notch, and also includes a discontinuous structure.

  On the other hand, when the PDP is progressively driven, the discharge electrodes adjacent to the upper and lower scan electrodes are shared at the time of addressing. Therefore, using the structure for separating the discharge, the “amount of wall charge” accumulated on the scan electrode is different in regions corresponding to the upper and lower discharge cells as shown in FIGS. 2 (a) and 2 (b). To drive. FIG. 4A is a diagram in which wall charges having different polarities are accumulated between adjacent discharge cells, and FIG. 4B is a diagram in which wall charges having different levels are accumulated with the same polarity. In any of these cases, the effective potential of the scan electrode in the upper and lower discharge cells can be differentiated, and the progressive address (address at different timing) of each adjacent discharge cell can be obtained using the shared scan electrode. Can be done.

  Similarly, when all the discharge cells constituting the screen of this PDP are subjected to a sustain discharge at the same timing, the “wall charge amount” accumulated on the display electrode using the above-described structure for separating the discharge is It can be different in the discharge region. By doing so, it is possible to drive all the discharge cells to sustain discharge at the same timing regardless of whether the upper and lower discharge cells are lit or not.

  The second feature (feature in terms of driving method) of the present invention is that the “wall charge” is controlled and driven in this way.

  Note that the normal progressive driving is to address adjacent display lines in the same direction (for example, from the top to the bottom) in the same direction (for example, in the direction from the top to the bottom). The present invention is not limited to the normal progressive driving for the entire screen, and includes a case where a part of the screen is partially line-sequentially addressed and a case where addresses are made in different directions.

  In other words, it can be said that the driving method of the present invention is a technique for driving the gas discharge panel so that adjacent display lines are addressed at different timings and a sustain discharge (display discharge) is generated at the same timing. .

  ADVANTAGE OF THE INVENTION According to this invention, progressive drive is realizable in the gas discharge panel which shares a display electrode with the two discharge cells adjacent to the extension direction of an address electrode.

  By making such a gas discharge panel, which conventionally used only interlaced driving, progressively driven, the substantial resolution and display quality can be greatly improved.

[First embodiment]
The structure of the PDP of the first embodiment will be described with reference to FIGS. FIG. 3 is a perspective cutaway view of the main part, and FIG. 4 is a plan view of the main part viewed from the display surface side.

  Display electrodes X and Y are disposed on a glass substrate 11 on the front side (display side), and a dielectric layer 17 made of low-melting glass and a protective layer 18 made of MgO are formed thereon.

  On the other hand, an address electrode A is formed on the glass substrate 21 on the back side, a dielectric layer 27 made of low melting point glass is formed thereon, and a lattice-like partition wall 29 (consisting of 29a and 29b) is formed thereon. The phosphor layers R, G, and B are applied to the dielectric layer surface and the side walls of the partition wall that are formed and surrounded by the lattice-shaped partition walls 29.

  Here, the display electrodes X and Y are composed of a transparent electrode (ITO) 41 and a metal bus electrode (Cr / Cu / Cr laminated film) 42, and the address electrode A is formed of a Cr / Cu / Cr laminated film. Yes.

  These pair of substrates are combined, a discharge gas mixed with a gas such as Ne, Xe, etc. is enclosed to form a PDP, and the phosphor of the corresponding discharge cell by ultraviolet light emitted from the selectively formed discharge The layer is excited and emits red, green, and blue light corresponding to R, G, and B of the phosphor layer. A color image can be displayed by controlling the light emission.

  Here, the DD sectional view of FIG. 1 is as shown in FIG. 1B, and the upper and lower cells adjacent to each other are partitioned and separated by a partition wall 29b at the center of the display electrodes X and Y. It has a structure. On the other hand, the partition wall 29a separates adjacent address electrodes A.

  Similarly, as shown in the plan view of FIG. 4, the discharge cells C1 and C2 adjacent to each other sharing the display electrode Y1 have a common address electrode A3 and surrounded by a partition wall 29 (29a and 29b). The separation between the adjacent discharge cells C1 and C2 (that is, the central portion of the display electrode Y1 shared by them) is performed as shown in FIG. 1B by the partition wall 29b.

  Since this PDP has a very good separation between adjacent discharge cells, progressive driving can be easily realized by applying a driving method described later.

  On the other hand, since the periphery of each discharge cell is surrounded without a gap, it is difficult to exhaust the inside of the PDP in which two glass substrates are combined, and it is necessary to exhaust before combining them. . In addition, since the discharge cells are almost completely separated from each other, it is impossible to drive using discharge coupling such as a seed-fire effect, and thus a device for driving is required.

The structure of the PDP that has been devised to remedy these drawbacks will be described in the following second to sixth embodiments.
[Second Embodiment]
The structure of the PDP of the second embodiment will be described with reference to a perspective cutaway view of the main part of FIG.

  In the present embodiment, the address electrode A, the dielectric layer 17 and the phosphor layers R, G, and B are disposed on the front substrate 11 side, and the display electrodes X and Y and the dielectric layer 27 are disposed on the rear substrate side. And the protective layer (not shown) and the partition 29 (29a and 29b) are arrange | positioned.

  The present embodiment is particularly characterized in that the notch 30 is formed above the partition wall 29b.

  The notch 30 can be used as an exhaust passage when exhausting the inside of the PDP, and can also be used as a path for coupling adjacent discharge cells (seeding effect or the like).

  With this structure, it is possible to separate the discharge cells that are vertically adjacent to each other to the extent that they can be progressively driven and to the extent that the seed-fire effect can be applied.

In this PDP, display light generated by the phosphor layers R, G, and B is radiated to the front substrate 11 side, and the radiated light is viewed from the front substrate 11 side. In contrast to the first embodiment called the reflection type, this embodiment is called the transmission type.
[Third embodiment]
6 and 7 show the panel structure of the PDP of the third embodiment. FIG. 6 shows the structure of the back substrate 21 having the partition walls 290. Although the phosphor layer is not shown, the phosphor layer is formed between the barrier ribs 290 as in the first embodiment.

  In this embodiment, a part of the grid-like partition wall 29 (part corresponding to 29b) is divided as in the first embodiment. In other words, the protruding partition 290c is formed.

  FIG. 7 shows an electrode structure. Bus electrodes 420 (420-1 to 420-4) are arranged on the partition walls, and overhang electrodes 410a and 410b made of transparent electrodes are formed in the upper and lower discharge cells C1 and C2 by being connected to the bus electrodes. These bus electrodes and overhanging electrodes constitute display electrodes X1, Y1, X2, and Y2 as shown.

  For example, in one discharge cell C1, the overhanging electrode 410a overhanging from the upper bus electrode 420-1 and the overhanging electrode 410b overhanging from the lower bus electrode 420-2 are opposed to each other to form a pair of discharge electrodes. Is configured.

  The discharge between the protruding electrodes 410a and 410b facing each other in the discharge cells C1 and C2 does not spread to the discharge cells adjacent to each other vertically (for example, from C1 to C2) due to the action of the barrier ribs 290. It is configured. That is, the overhanging electrodes 410a and 410b that generate discharge are configured to overhang the upper and lower discharge cells via the inner portion so as not to protrude outside the width of the protruding partition 290c. The discharge coupling between the discharge cells is suppressed.

  In addition, a protruding partition 290c is formed so as to suppress discharge between the end portion of the overhang electrode 410a and the bus electrode 420-2 facing the end portion.

  The present embodiment is characterized in that it can be applied to any configuration of a reflection type and a transmission type. When applied to the reflection type configuration, it is advantageous in that the luminance can be increased as compared with the PDP of the transmission type second embodiment.

  Next, a driving method for performing progressive driving using this PDP will be described. FIG. 8 shows the drive waveform, and FIG. 9 shows a block diagram of the drive circuit. FIG. 8 shows drive waveforms for a PDP having seven display electrodes X1, Y1, X2, Y2, X3, Y3, X4, three address electrodes, and six rows and three columns of discharge cells. .

  Addressing is performed separately for discharge cells on both sides of even-numbered X electrodes (X2, X4) and discharge cells on both sides of odd-numbered X electrodes (X1, X3).

  First, in the first initialization process, wall charges are formed so that address discharge occurs only in the discharge cells including even-numbered X electrodes in the subsequent first address process. Next, in the second initialization process, wall charges are formed so that address discharge occurs only in the discharge cells including odd-numbered X electrodes in the second address process. FIG. 8 shows drive waveforms for satisfying these conditions.

  In the display process after the second address process (also referred to as “sustain discharge process”), a sustain discharge occurs only in the discharge cells selected in the first and second address processes, and the sustain discharge is repeated. The screen display is performed corresponding to the pattern of the selected discharge cell.

  In the following, the state of the wall charge will be described in detail. First, the discharge by the ramp wave used in the initialization process of FIG. 8 will be described.

  The ramp wave used here has a slope of about 1 to several V / μs and can continuously cause a minute discharge. The term “micro discharge” as used herein refers to a mode in which a small pulsed discharge occurs continuously with an extremely slow voltage increase, or a continuous discharge (a large number of continuous pulse discharges). Rather, it refers to a form in which a substantially uniform continuous discharge) occurs or a mixture thereof. Hereinafter, the “micro discharge” is generically referred to as “micro discharge”.

  In addition, although a ramp wave is used here, the waveform is not limited to a ramp wave as long as it is an applied voltage waveform that causes a minute discharge, and a curved waveform or a combination thereof can also be used.

When a micro discharge is occurring, there is a characteristic that the effective voltage applied to the discharge space of the discharge cell (the sum of the voltage applied to the electrode and the wall voltage) is substantially equal to the discharge start voltage of the discharge cell. When the discharge start pressure of the discharge cell is Vt (constant value), the applied voltage is Vr (variable), and the wall voltage is Vw (variable),
Vr + Vw = Vt (1)
The following relational expression holds.

Since the minute discharge ends when the ramp wave voltage rise stops, assuming that the ultimate voltage of the ramp wave is Vr0 (constant value) and the wall voltage after applying the ramp wave is Vw0 (constant value), Vr0 + Vw0 = Vt (1a)
It becomes. As can be seen from the equation (1a), the wall voltage Vw0 after the ramp wave application can be freely controlled by the ramp voltage Vr0.

  The wall voltage can be initialized by combining two ramp waves.

The first ramp wave is a positive ramp wave, its ultimate voltage is Vr1, the second ramp wave is a negative ramp wave, and its ultimate voltage is Vr2. Further, a discharge start voltage for a positive ramp wave between the electrodes to which the ramp wave is applied is Vt1, and a discharge start voltage for a negative ramp wave is Vt2. Then, assuming that the voltage is uniformly described by the polarity of the first ramp wave, the wall voltage Vw1 after the first ramp wave is applied is Vw1 ≦ Vt1−Vr1 (2) in the same manner as the equation (1a).
It becomes.

  Here, there is a case where discharge does not occur in the first ramp wave depending on the value of the wall voltage before the application of the first ramp wave. This corresponds to the inequality sign of the equation (2), and the case where discharge occurs in the first ramp wave is equal. Corresponding to

  Next, when the second ramp wave is applied with the opposite polarity to the first ramp wave following the first ramp wave, if a discharge occurs in the second ramp wave, the result is the same as the result of the formula (1a). The wall voltage after application of the second ramp wave is determined only by the ultimate voltage of the second ramp wave, regardless of the wall voltage before application of the second ramp wave. Eventually, initialization can be performed by the second ramp wave.

Since the condition for causing the discharge with the second ramp wave is that the effective voltage of the discharge cell exceeds the discharge start voltage by the application of the second ramp wave, the second ramp wave has a polarity opposite to that of the first ramp wave. Note that
Vr2 + Vw1 ≦ Vt2 (3)
It becomes. Therefore, Vr2 ≦ Vr1−Vt1 + Vt2 (4)
If (3) is satisfied, the expression (3) is established and initialization can be performed.

Rewriting this equation (4), Vr1-Vr2 ≧ Vt1-Vt2 (5)
Or
| Vr1 | + | Vr2 | ≧ | Vt1 | + | Vt2 | (5a)
Get.

  When the condition of the expression (5) or (5a) is satisfied, a discharge can be generated by the second ramp wave, and a wall charge determined only by the ultimate voltage of the second ramp wave can be formed. Therefore, the condition of the expression (5) or (5a) will be referred to as an initialization condition.

  Here, restrictions on the polarity of the ramp wave will be described.

When a discharge is caused by applying a rectangular wave subsequent to the ramp wave (for example, when an address discharge in the address process of FIG. 8 is caused), the effective voltage Vc of the discharge cell at that time is considered. Assuming that the voltage of the rectangular wave applied subsequent to the ramp wave is Vp, from the equation (1), when the rectangular wave has the same polarity as the ramp wave,
Vc = Vta + (Vp−Vr) (6)
When the polarity is opposite to that of the ramp wave, Vc = Vtb + (Vp-Vr + Vta-Vtb) (7)
It becomes. Here, Vta is a discharge start voltage when a rectangular wave having the same polarity as the ramp wave is applied, and Vtb is a discharge start voltage when a rectangular wave having the opposite polarity to the ramp wave is applied.

  The second term on the right side of the equations (6) and (7) [the term enclosed by () on the right side] is the amount of overvoltage (the amount by which the effective voltage exceeds the discharge start voltage) in each polarity. The amount of overvoltage determines the intensity of discharge.

  The overvoltage amount when the subsequent rectangular wave has the same polarity as the preceding ramp wave is determined only by the applied voltage, but the overvoltage amount when the rectangular wave has the opposite polarity to the ramp wave depends on the discharge start voltage. Since this discharge start voltage is an amount that varies from discharge cell to discharge cell, when the subsequent rectangular wave has the opposite polarity to the preceding ramp wave, the discharge intensity due to the rectangular wave varies from discharge cell to discharge cell, so that stable driving is possible. Can not do.

  Therefore, in order to reduce the variation of the driving condition for each discharge cell, the polarity of the rectangular wave of the address discharge and the polarity of the lamp voltage applied last in the initialization process preceding the address discharge should be the same. The conclusion is obtained.

  The above is a case where one electrode is initialized. However, even when there are a plurality of electrodes as in the PDP of the present invention, initialization can be similarly performed. Specifically, voltage settings may be made such that two ramp waves having different polarities are applied between the respective electrodes, and discharge is generated by the ramp wave second applied between the electrodes.

  Specifically, for example, in the first step of the first initialization process shown in FIG. 8, the lamp voltage is applied between AX and AY using the A electrode as a common cathode. Further, in the second step, the lamp voltage is applied between AX and XY using the X electrode as a common cathode, and in the third step, the lamp voltage is applied between AY and XY using the Y electrode as a common cathode.

  At this time, between AX and XY, since ramp voltages having different polarities are applied in successive steps, voltage setting can be performed so as to satisfy the initialization condition of equation (5) between the respective electrodes. . On the other hand, during AY, the discharge occurs in the first step and the third step and is not continuous, so the state of the wall voltage between AY is slightly disturbed by the discharge between the other electrodes during the second step. The In this case, strictly speaking, the initialization condition of the equation (5) is inaccurate, but it can be used as a guide for substantial voltage setting. Actually, it is only necessary that the discharge between AYs occurs in the third step (substantially initialization becomes possible).

  In the fourth step of the first initialization process, the drive waveform of the present invention includes an odd-numbered X electrode and an Y-electrode adjacent to the top and bottom of the X-electrode, that is, an odd-numbered X electrode. A lamp voltage is applied between XY of the discharge cells to cause a corresponding discharge cell group to perform a minute discharge. (On the other hand, according to the waveform of FIG. 8, the discharge cell is controlled so as not to be discharged by the lamp voltage between XY of the discharge cells including even-numbered X electrodes.) Specifically, for example, Y2 and X3 A micro discharge is generated in the discharge cell group between the electrodes and between the electrodes Y3 and X3.

  Thus, in terms of the wall voltage based on the Y electrode, after the initialization process, the wall voltage between XY of the discharge cells configured on both sides of the odd-numbered X electrode is configured on both sides of the even-numbered X electrode. It becomes lower than the wall voltage between XY of the discharge cell made.

  Further, due to the barrier rib structure as shown in FIGS. 6 and 7, the discharge of each discharge cell does not spread beyond the section of the discharge cell (for example, C1, C2, etc. in FIG. 7).

  By this initialization process, the amount of wall charges on the Y electrode is formed at different levels on the even-numbered X electrode side and the odd-numbered X electrode side across the partition wall structure. This situation is as shown in FIG. 2 (a) or (b).

  With this initialization, the wall voltage of the discharge cell formed between the A electrode and the Y electrode also varies depending on the type of the Y electrode facing the A electrode. That is, in terms of the wall voltage based on the Y electrode, the wall voltage between the AYs between the “Y electrode part on the side of the odd-numbered X electrode when viewed from the partition on the Y electrode” and the A electrode is “ It becomes lower than the wall voltage between AYs between the A electrode and the Y electrode part on the side of the even-numbered X electrode as viewed from the partition on the Y electrode.

  Accordingly, when a scan pulse is applied to the Y electrode in the first address process after the first initialization process of FIG. 8, an address discharge can be generated only in the discharge cells including even-numbered X electrodes. Specifically, for example, the discharge between the Y1 electrode and the A electrode is used as a trigger to generate an address discharge between the Y1 electrode and the X2 electrode, and then the discharge between the Y2 electrode and the A electrode is used as a trigger. An address discharge is generated between the X2 electrode. At this time, the potentials of the even-numbered X electrodes and the odd-numbered X electrodes are differentiated so as to further suppress the occurrence of address discharge in the discharge cells including the odd-numbered X electrodes.

  After the first initialization process, the wall voltage between the X electrode and the Y electrode in the discharge cell including the even-numbered X electrode is about 50 V with respect to the Y electrode.

  In the first address process subsequent to the first initialization process, the address voltage is set to such an extent that a weak discharge is caused to the non-selected discharge cells. In this case, the wall voltage after discharge is about 0V. On the other hand, the selective discharge cell is strongly discharged, and the wall voltage after the discharge is about −100V. That is, after the first address process, the wall voltage between the X electrode and the Y electrode in the discharge cell including the even-numbered X electrode changes. This suppresses address discharge between XY including even-numbered X electrodes in the second address process. Although very little discharge occurs between AYs, the wall voltage disturbance between XYs is sufficiently small.

  In the second initialization process, the discharge cell between the X electrode and the Y electrode of the discharge cell including the odd-numbered X electrode is initialized. Similar to the first initialization process, the wall voltage between XY is set to about 50V.

  In the second address process, address discharge is performed on discharge cells including odd-numbered X electrodes. Specifically, for example, the discharge between the Y2 electrode and the A electrode is used as a trigger to generate an address discharge between the Y2 electrode and the X3 electrode, and then the discharge between the Y3 electrode and the A electrode is used as a trigger. An address discharge is generated between the X3 electrode. Setting the address voltage so as to cause weak discharge in the non-selected cell and strong discharge in the selected cell is the same as in the first address process. In addition, because of the barrier rib structure, the wall voltage disturbance of the discharge cells including the even-numbered X electrodes is sufficiently small in the second address process after the second initialization process.

  FIG. 13 shows an example of the set voltage. The sum of the discharge start voltages (| Vt1 | + | Vt2 |) of the PDP of this example is about 420V between AX and AY, and about 460V between XY.

  In FIG. 8, the ramp wave of each electrode rises gently from 0 V, but can rise rapidly to a voltage level at which no micro discharge occurs.

  FIG. 9 shows a block diagram of a drive circuit for performing the drive as described above.

  The X electrode group such as X1, X2, and X3 is driven by the X electrode side driver 110, and the Y electrode group such as Y1, Y2, and Y3 is driven by the Y electrode side driver 120 so as to output the waveform of FIG. The side driver 130 is driven to output data of each electrode corresponding to predetermined display information. On / off of each waveform, drive timing, and the like are controlled by the control circuit unit 140.

Needless to say, the drive waveforms and drive circuit configurations described with reference to FIGS. 8 and 9 can be applied to the first and second embodiments in exactly the same manner.
[Fourth embodiment]
FIG. 10 shows drive waveforms of the fourth embodiment.

This is a modification of the drive waveform of FIG. 8, and as shown in the waveform of the first initialization process of FIG. 8, the third step and the first step of the first initialization process of the third embodiment shown in FIG. The four steps can be continuously driven. The drive time can be shortened by the amount that one step is eliminated.
[Fifth embodiment]
FIG. 11 shows a modified example of the structure of the back substrate having the partition walls as the fifth embodiment.

Like the barrier rib structure in this figure, the upper and lower discharge cells can be separated by a barrier rib having a low height, and can be used instead of the structure of FIG. Since there is no particular difference between the two, the design can be selected as appropriate.
[Sixth embodiment]
FIG. 12 shows the electrode structure of the sixth embodiment.

  The shape of the partition wall in this example is similar to that of the third example, but the shape of the protruding electrode made of a transparent electrode (ITO) is different.

  In the present embodiment, a pair of overhanging electrodes are arranged opposite to each other in the extending direction on the address electrode in one discharge cell. In contrast, in the third embodiment, in one discharge cell, a pair of overhanging electrodes are arranged to face each other with the address electrode interposed therebetween.

  The point that the protruding electrode protrudes from the protruding partition wall 290b is the same as in the third embodiment.

  This example is inferior to the third example in that the substantial discharge area is small and the luminance is low, but because the electrode structure is such that the transparent electrode (the overhang electrode) is discontinuous, There is an advantage that the separation of the discharge becomes better and a more stable operation is possible.

  The above embodiments are all directed to the PDP, but the contents of the present invention are not limited to the PDP. For example, it can be used for a gas discharge scanning unit of PALC (Plasma Addressed Liquid Crystal).

  Therefore, the present invention is intended for all gas discharge panels to which the above-described solutions and ideas of the embodiments can be applied.

  In the gas discharge scanning section for PALC that is not intended for display itself, the above-mentioned implementation is performed by replacing "display cell" with "discharge cell" and "display electrode" with "sustain discharge electrode or scan electrode". The present invention can be applied just like the examples.

Sectional drawing which shows the difference of a conventional example and PDP of this invention Sectional drawing which shows accumulation | storage of wall charge of PDP of this invention 1 is an exploded perspective view showing the structure of a PDP according to a first embodiment of the present invention. Plan view of the PDP in FIG. The disassembled perspective view which shows the structure of PDP of 2nd Example of this invention. The figure which shows the structure (partition wall structure) of the back substrate of PDP of FIG. The top view which shows the electrode structure of PDP of FIG. The figure which shows the drive waveform of PDP of FIG. The block diagram which shows the drive circuit of PDP of FIG. The figure which shows the modification of the drive waveform of FIG. The figure which shows the structure (partition wall structure) of the back substrate of PDP of 5th Example of this invention. The top view which shows the electrode structure of PDP of 6th Example of this invention The chart which shows the setting voltage etc. of each electrode of PDP of this invention Exploded perspective view showing the structure of a conventional PDP The top view which shows the structure of PDP of a prior art example The figure which shows the drive waveform of PDP of a prior art example

Explanation of symbols

11 Front substrate 17, 27 Dielectric layer 21 Rear substrate 28R, 28G, 28B Phosphor layer, (red, green, blue)
29, 29a, 29b Partition 290, 290a, 290b, 290c Partition 30 Notch 41, 410a, 410b Transparent electrode, overhang electrode 42 Bus electrode 420, 420-1, 420-2,... Bus electrode A, A1 Address electrodes X, X1, X2, X3,... Display electrodes, sustain discharge electrodes Y, X1, Y2, Y3,... Display electrodes, scan electrodes T Transparent electrodes B Bus electrodes D Dielectric layer P Protective layer C1, C2 Discharge cell

Claims (3)

A plurality of first electrodes disposed on one substrate and covered with a dielectric layer, and a plurality of stripe-shaped second electrodes disposed on the other substrate, and the first electrode has a stripe shape A method for driving a gas discharge panel including a partition for partitioning two discharge cells sharing the first electrode from both sides of the stripe electrode portion in the vicinity of a position where the electrode portion and the second electrode intersect Because
A driving method of a gas discharge panel, wherein the two discharge cells sharing the first electrode are driven so that the wall charge amounts are set to different levels in the addressing process. One of the odd-numbered electrode group and the even-numbered electrode group of the plurality of first electrodes is an X electrode group, and the other is a Y electrode group.
Each discharge cell of the discharge cell group includes a first discharge cell group arranged between an odd-numbered X electrode in the X electrode group and a pair of Y electrodes adjacent to both sides of the X electrode. A first address process for forming a charge corresponding to the display information;
Each discharge cell of the discharge cell group includes a second discharge cell group arranged between the even-numbered X electrode in the X electrode group and a pair of Y electrodes adjacent to both sides of the X electrode. And a second address process for forming a charge corresponding to the display information of
After the first address process and the second address process are performed in different periods, the first electrode is shared by having a sustain discharge process of sustaining and discharging the first and second discharge cell groups at the same timing. 2. The method of driving a gas discharge panel according to claim 1, wherein the two discharge cells are driven so as to set the wall charge amounts to different levels. The first and second discharges are generated so that the address discharge is generated only in the first discharge cell group in the first address process and only in the second discharge cell group in the second address process. 3. The driving of a gas discharge panel according to claim 2, wherein an initialization process for presetting predetermined wall charges in the cell group is provided before each of the first address process and the second address process. Method.

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