JP2000305511A - Ac plasma display device and driving method of ac plasma display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an AC plasma display device and its driving method capable of preventing image quality degradation by suppression of a cross talk during an sustained period, and improved in luminous efficiency. SOLUTION: In this plasma display panel, plural first electrodes and second electrodes covered with a first dielectric layer are formed alternately in the row direction on one substrate, a third electrode group covered with a second dielectric layer is formed in the column direction on the other substrate facing to the substrate, and one discharge cell is composed on an intersection point of the three electrodes. In this case, during an sustained period of luminescence by repeating display discharge of the discharge cell, one display discharge is generated with preliminary discharge generated between the first electrodes and the third electrodes as a trigger relative to discharge cells on even-numbered rows, and with preliminary discharge generated between the second electrodes and the third electrodes as a trigger relative to discharge cells on odd-numbered rows. An electrode that the preliminary discharge is generated between itself and the third electrode relative to each discharge cell is switched between the first electrodes and the second electrodes alternately at every display discharge, to repeat the display discharge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device for displaying an image by using discharge between electrodes, and more particularly, to an AC plasma display in which an AC voltage is applied to the electrodes during a sustain period to maintain the discharge. The present invention relates to a panel structure and a driving method.

[0002]

2. Description of the Related Art The configuration of a conventional AC plasma display panel is shown in FIG. As shown in FIG.
A C-type plasma display panel (hereinafter referred to as “panel”) 15 has a first glass substrate 1 with a discharge space 2 interposed therebetween.
3 and the second glass substrate 4 are arranged to face each other. The first glass substrate 13 is a transparent glass substrate,
On the first glass substrate 13, a plurality of strip-shaped scan electrodes 7 and sustain electrodes 8 covered with a dielectric layer 5 and a protective layer 6 are provided.
And are alternately arranged in parallel. In the drawing, only a pair of the scanning electrode 7 and the sustain electrode 8 are shown. The scanning electrode 7 and the sustaining electrode 8 are respectively composed of transparent electrodes 7a, 8a and metal bus bars 7b, 8b for increasing conductivity.

On the second glass substrate 4, a plurality of band-shaped data electrodes 9 are arranged in parallel in a direction perpendicular to the scanning electrodes 7 and the sustaining electrodes 8. In the figure, only one data electrode 9 is shown. Between the data electrodes 9,
A strip-shaped partition wall 10 for isolating each data electrode 9 and forming the discharge space 2 is provided. In addition, a phosphor 11 is formed from above the data electrode 9 to the side surface of the partition wall 10. The discharge space 2 is filled with a mixed gas of at least one kind of rare gas and xenon among helium, neon, and argon. Scan electrode 7 and sustain electrode 8
One discharge cell is formed at the intersection of the data electrode 9 and the data electrode 9.

[0004] The panel 15 is configured to view an image display from the first glass substrate 13 side which is the display surface side.
The panel 15 emits the fluorescent material 1 by ultraviolet rays generated by a discharge between the scan electrode 7 and the sustain electrode 8 in the discharge space 2.
1 is excited, and visible light from the phosphor 11 generated by the excitation is used for display light emission.

Next, a method of displaying image data on the conventional panel 15 will be described. In order to display image data, an initialization period for initializing the discharge cells, an address period for writing data to the discharge cells, and a sustain period for maintaining the light emission of the discharge cells are set, and a different signal waveform is applied to each electrode in each period. Is applied.

That is, in the initialization period, for example,
A pulse voltage of a positive polarity is applied to all the scan electrodes 7 with respect to the sustain electrodes 8 and the data electrodes 9, and wall charges are accumulated on the protective layer 6 and the phosphor 11.

Thereafter, during the address period, a positive data pulse is applied to the data electrode 9 only when display data is present, while sequentially applying a negative pulse to the scan electrode 7. At this time, a discharge between the scan electrode 7 and the sustain electrode 8 is induced by a discharge generated between the data electrode 9 and the scan electrode 7, and a wall charge is formed on the dielectric layer 5 according to the presence or absence of a data pulse. . The formation of the wall charges indicates a state in which data is written in the discharge cells.

In the subsequent sustain period, a voltage sufficient to maintain a discharge is applied between scan electrode 7 and sustain electrode 8 for a certain period. Thus, the scanning electrode 7 and the sustain electrode 8
Discharge plasma is generated at the intersection of
11 is excited to emit light. In a discharge space where no data pulse is applied during the address period, that is, in a discharge cell where no data is written, no light emission due to discharge occurs.

In such a conventional panel, the scanning electrodes 7
The interval 12 between the electrode and the sustain electrode 8 is set close to a value at which a minimum discharge voltage determined by Paschen's law is obtained. This is to reduce the external sustain voltage V _{su s} applied between the sustain electrodes 8 and the scanning electrode 7 in the sustain period.
That is, when the discharge start voltage between the sustain electrode 8 and the scan electrode 7 is V _fss, and the wall voltage between them is V _wss , there is a relationship of V _fss <V _sus + V _wss (1). By designing the panel so that V _fss is minimized, the display discharge can be maintained at a lower applied voltage V _sus . The lower the external sustain voltage V _sus is, the easier the circuit design is, and the loss due to the reactive power can be reduced.

At present, it is known that the luminous efficiency of the panel manufactured is highest when the total pressure of the filled gas is about 50 to 60 KPa and the partial pressure of the xenon gas is 5 to 10%. At this time, when the interval 12 between the scan electrode 7 and the sustain electrode 8 is 80 to 100 μm, the external sustain voltage V _sus
Is extremely small, and V _sus = 180 to 200 V is obtained.

[0011]

The above-mentioned conventional panel has a drawback that the light emission efficiency is extremely low as compared with a display device such as a CRT. For example, the above interval 1
In the case of a panel having a thickness of 2 to 80 μm, the luminous efficiency is 1
/ W) about 1/5 of the CRT before and after.

It is generally known that the luminous efficiency of discharge increases as the length between the electrodes increases. This is because there is a large voltage drop near the electrode serving as the cathode, and the ratio of light emission to the power consumed there is small. Increasing the electrode-to-electrode length increases luminous efficiency, but the discharge starting voltage V
_fss also rises sharply according to the Paschen curve, making driving difficult.

When the interval 12 is increased, as a result, the interval between the electrodes of adjacent cells is reduced, so that an undesirable discharge, that is, crosstalk, is likely to occur between adjacent discharge cells. If the crosstalk occurs during the maintenance period, there is a problem that image display is disturbed and image quality is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made in consideration of the above problem.
It is an object of the present invention to provide a plasma display device and a method for driving an AC plasma display device.

[0015]

In order to solve the above problems, an AC type plasma display device according to the present invention has the following configuration. That is, in the AC plasma display device, two substrates are arranged to face each other with a partition wall therebetween, and a plurality of rows of first electrodes and second electrodes covered with a first dielectric layer in a row direction are provided on one of the substrates. Electrodes are alternately formed, and a third electrode group covered with a second dielectric layer is formed on the other substrate in the column direction. The distance between the first electrode and the second electrode is equal to the distance between the first electrode and the third electrode. It is set wider than the electrode spacing,
One discharge cell is formed at the intersection of the three electrodes. AC
The type plasma display device writes data in discharge cells to emit light during an address period, and applies a voltage between a first electrode, a second electrode, and a third electrode to a discharge cell to which data is written during an address period during a sustain period. , The light emission of the discharge cells is maintained.
Further, the AC type plasma display device includes an electrode driving means for driving each electrode. The electrode driving means generates a display discharge of each time in the sustain period, and for a discharge cell belonging to a certain row, triggered by a preliminary discharge generated between the first electrode and the third electrode as a trigger. For the discharge cells belonging to the row to be driven, each electrode is driven so that the preliminary discharge generated between the second electrode and the third electrode is generated as a trigger. At this time, the electrode driving means drives each electrode such that an electrode that causes a preliminary discharge with the third electrode in each discharge cell is alternately switched to the first electrode or the second electrode for each display discharge, and the display discharge is performed. repeat.

Further, the amplitude of the voltage pulse applied to the first and second electrodes for causing a display discharge in the sustain period is determined by changing the amplitude of the voltage pulse applied to the first electrode or the second electrode using the first dielectric layer as a cathode.
Discharge start voltage between the first and second electrodes when the discharge start voltage is higher than the discharge start voltage between the electrodes and the third electrode and the discharge exists between the first electrode or the second electrode and the third electrode. May be set to be larger than half. Alternatively, the amplitude of the voltage pulse applied to the first electrode and the second electrode during the sustain period may be set to be smaller than one half of the firing voltage between the first electrode and the second electrode. Alternatively, the amplitude of the voltage pulse applied to the first electrode and the second electrode during the sustain period is set to be smaller than the discharge starting voltage between the first electrode or the second electrode and the third electrode when the third electrode is a cathode. You may set it small.

In the method of driving an AC plasma display device according to the present invention, a plurality of substrates are arranged opposite to each other with a partition wall therebetween, and one substrate is covered with a first dielectric layer in a row direction on one substrate. A first electrode and a second electrode in a row are formed alternately, and a third electrode group covered with a second dielectric layer is formed in the column direction on the other substrate, and the first electrode and the second electrode are formed. The interval is set wider than the interval between the first electrode and the third electrode, one discharge cell is formed at the intersection of the three electrodes, data is written in the discharge cell to emit light during the address period, and the data is written during the sustain period. A method of driving an AC type plasma display apparatus that maintains light emission of a discharge cell by repeating display discharge between a first electrode, a second electrode, and a third electrode for a discharge cell in which data is written during an address period. It is. In the method, a display discharge of each time is generated in a sustain period, and a pre-discharge generated between a first electrode and a third electrode for a discharge cell belonging to a certain row is generated as a trigger, and a row adjacent to a certain row is generated. , The pre-discharge generated between the second electrode and the third electrode is generated as a trigger. In addition, before and after that, the display discharge is repeated while alternately switching the electrode that causes the preliminary discharge with the third electrode to the first electrode or the second electrode for each display discharge in each discharge cell.

According to the above configuration, during the sustain period, the first electrode belonging to a certain row and the second electrode belonging to the adjacent row have the same potential, so that the first electrode and the second electrode between the adjacent rows are equal. Discharge, that is, crosstalk is prevented, whereby the length between the first electrode and the second electrode can be increased, and an AC-type plasma display panel with significantly improved luminous efficiency can be realized.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an AC type plasma display panel according to the present invention will be described below in detail with reference to the accompanying drawings.

<First Embodiment> (Structure of Plasma Display Panel) FIG. 1 shows an AC type plasma display panel (hereinafter referred to as "panel").
It is sectional drawing which shows a structure of. FIG. 1B is a cross-sectional view taken along the line EE ′ in FIG.

As shown in FIG. 1, in a panel 1, a first glass substrate 3 and a second glass substrate 4 are arranged to face each other with a discharge space 2 interposed therebetween. The first glass substrate 3 is a transparent glass substrate.
On the upper side, an electrode group consisting of a pair of strip-shaped first and second electrodes X and Y covered with a dielectric layer 5 and a protective layer 6 is arranged in parallel with each other. For the protective layer 6, a material having a high secondary electron emission coefficient such as MgO (magnesium oxide) is used.

On the second glass substrate 4, strip-shaped third electrodes A are arranged in a direction orthogonal to the first electrodes X and the second electrodes Y. The plurality of third electrodes A are arranged in parallel on the second glass substrate 4 in the panel 1. A strip-shaped partition 10 for isolating each third electrode A and forming a discharge space 2 is provided between each third electrode A. Further, the phosphor 11 is formed from the third electrode A to the side surface of the partition wall 10. The discharge space 2 is filled with a mixed gas of at least one kind of rare gas and xenon among helium, neon, and argon. One discharge cell is formed near a point where the first electrode X and the second electrode Y intersect with the third electrode A.

The panel 1 is configured to view an image display from the first glass substrate 3 side which is the display surface side, and excites the phosphor 11 by ultraviolet rays generated by the discharge in the discharge space 2. The visible light from the phosphor 11 generated by the excitation is used for display light emission.

FIG. 2 is a view for explaining the arrangement of the first and second electrodes X and Y and the third electrode A on the first glass substrate 3 of the panel 1. It is assumed that there are a total of n electrodes X and Y. A discharge gap (hereinafter referred to as “main discharge gap”) d _ss is formed between a set of the first electrode X and the second electrode Y belonging to the same row. Further, a discharge cell C is formed at the intersection of each of the electrodes X, Y, and A. In this way, the discharge cells C are arranged in a matrix in the panel 1 in which a set of the first electrode X and the second electrode Y is a row and the third electrode A is a column. FIG. 2 shows a first electrode driving circuit 31x, a second electrode driving circuit 31y, and a third electrode driving circuit 31a for driving the first electrode X, the second electrode Y, and the third electrode A, respectively. I have. 1st electrode drive circuit 31x, 2nd
The electrode drive circuit 31y and the third electrode drive circuit 31a drive the first electrode X, the second electrode Y, and the third electrode A by controlling the respective potentials to predetermined potentials.

FIG. 3 shows a first example of the panel 1 of this embodiment.
FIG. 3 is a diagram illustrating a distance between an electrode X and a second electrode Y. As shown in the drawing, in the panel of the present embodiment, the main discharge gap d _ss is 430 μm, and the gap between the third electrode A and the first electrode X (or the second electrode Y) (hereinafter referred to as “sub discharge gap”). "hereinafter.) d _sa has a 130μm, and is set to wide spacing of the main discharge gap d _ss to the sub-discharge gap d _{s a.} As a result, high luminous efficiency can be obtained unlike the related art in which the main discharge gap d _ss <the sub discharge gap d _sa . Here, examples of the design values of the panel of the present embodiment are shown below. Cell interval: 1080 μm Main discharge gap: 430 μm Partition height: 130 μm Electrode width: 100 μm Gas composition: Xe (5%), Ne (95%) Gas pressure: 60 kpa

In FIG. 3, the second electrode Y of the cell in the i-th row
and _i, the gap between the first electrode X _{i +1} (i + 1) th row of the cell d
_aj is 450 μm, and the main discharge gap d _ss (= 430
μm). That is, the first electrode X _i and the discharge start voltage between the second electrodes Y _i in the same cell (e.g.,
720 V) and the discharge start voltage (eg, 750 V) between the first electrode X _{i + 1} and the second electrode Y _i between different cells is reduced (30 V), so that the electrodes Y _i and X
Discharge across the cell between _{i + 1} , that is, crosstalk is likely to occur. Since the crosstalk disturbs the image display, some means for preventing the crosstalk is required. The panel of the present embodiment controls image display so as to prevent crosstalk as described later.

(Control of Plasma Display Panel) Hereinafter, control for displaying the panel 1 of the present embodiment will be described. First, the firing voltage between the electrodes referred to in the following description is defined as follows. V _fss: discharge start voltage between the first electrode X and the second electrode Y in the same cell V _{f a j:} when a discharge is caused between different cells, and the first electrode X of one cell, one cell Of the other cell adjacent to
Discharge starting voltage V _fsa between electrode Y and first electrode X (or second electrode Y) when first electrode X (or second electrode Y) is used as a cathode (cathode).
_Firing voltage _Vfas between the first electrode X and the third electrode A when the third electrode A is a cathode
(Or the second electrode Y) and the discharge starting voltage V _fssa between the third electrode A: the first electrode X (or the second electrode Y) and the third electrode A
Discharge start voltage between the first electrode X and the second electrode Y when a discharge exists between the first electrode X and the second electrode Y

Here, V_fssIs running on a conventional panel
It is the same as the firing voltage between the test electrode 7 and the sustain electrode 8.
However, in the present embodiment, the gap between the first electrode X and the second electrode Y
Since the gap has been expanded compared to the conventional case,
Becomes higher than the discharge starting voltage in the conventional case. Ma
V_fsaAnd V_fasOnly the polarity of the discharge is different
However, the first electrode X is made of MgO having a high secondary electron emission coefficient.
Therefore, the third electrode A has a higher electron emission coefficient than MgO.
Lower phosphor,_fsa≪V_fasOf the relationship
stand. Further, a gap between the first electrode X and the third electrode A
When initial discharge (hereinafter referred to as “preliminary discharge”) occurs
Generates a large amount of initial charge. For this reason, this preliminary release
A place where a discharge is caused between the first electrode X and the second electrode Y immediately after charging
In this case, the discharge starting voltage is
It drops significantly. That is, V_fssa≪V _fssBecomes

In the panel of the present embodiment, the respective discharge starting voltages were as _follows : V _fss = 720 V V _faj = 750 V V _fsa = 250 V V _fas = 350 V V _fssa = 450 V

FIG. 4 is a diagram showing an example of voltage waveforms applied to the electrodes X, Y and A by the electrode drive circuits 31x, 31y and 31a to display an image on the panel of the present embodiment. This diagram shows the voltage waveforms applied to each of the first electrode X, the second electrode Y, and the third electrode A in the i-th row and the (i + 1) -th row. FIG. 4A shows the i-th
FIG. 4B shows a voltage waveform applied to the first electrode X _i in the row, and FIG. 4B shows a voltage waveform applied to the second electrode Y _i in the i-th row. 4C shows a voltage waveform applied to the first electrode X _{i + 1} in the (i + 1) th row, and FIG. 4D shows a voltage waveform applied to the second electrode X _{i + 1} in the (i + 1) th row.
3 shows a voltage waveform applied to an electrode Y _{i + 1} . (E) of FIG.
Indicates a voltage waveform applied to the third electrode A.

As shown in FIG. 4, in order to display image data on the panel 1, an initialization period for initializing cells, an address period for writing display data to each cell, and a sustain period for maintaining light emission are respectively provided. Then, different signal waveforms (pulses) are applied to the electrodes in each period. Hereinafter, each period will be described.

(Control of Initialization Period) In the initialization period, for example, as shown in FIG. 4, a positive voltage waveform is applied to all the first electrodes X, and a wall is formed on the protective layer 6 and the phosphor 11. Accumulate charge. The voltage waveform in the initialization period is set so that the voltage applied between the protective layer 6 on the first electrode X and the phosphor 11 on the third electrode A becomes almost V _fsa at the end of the initialization period. Have been. When the initialization period ends, the operation shifts to the address period.

(Control of Address Period) In the address period, the first electrodes X are scanned while sequentially applying a negative pulse (hereinafter referred to as a “scan pulse”) to each of the first electrodes X. While one first electrode X is being scanned, a positive data pulse is applied to the third electrode A of a plurality of cells to which display data is to be written among the plurality of cells connected to the first electrode X. I do. Only when a positive data pulse is applied to the third electrode A, a discharge occurs between the third electrode A and the first electrode X, and this discharge induces a discharge between the first electrode X and the second electrode Y. Then, wall charges are formed on the protective layer 6 according to the presence or absence of the data pulse. In the subsequent sustain period, display light emission is performed using the wall charges. While the first electrode is sequentially scanned, the second electrode Y is controlled to a predetermined potential.

(Control of Sustain Period) After the address period, when the sustain period starts, an AC pulse (hereinafter referred to as a “sustain pulse”) is applied to all the electrodes X and Y, and the cells selected in the address period are applied. That is, a pulse discharge is continuously generated in the cell in which the wall charges are formed. At this time, the potential of the first electrode X _i in the sustain period, and adjacent thereto, a second electrode Y _{i + 1} and Y _i-1 potential controls sustain pulses to be the same belonging to it with a different cell . For this reason, a sustain pulse is applied so that the phases of the adjacent first electrodes X are opposite to each other. That is, the first of the odd rows
An opposite-phase sustain pulse is applied between the electrode X and the first electrode X in the even-numbered row. A sustain pulse is similarly applied to the second electrode Y. That is, the sustain pulses having opposite phases are applied to the second electrodes Y in the odd rows and the second electrodes Y in the even rows.
Thus, the first electrode X _i and undesirable discharge between the second electrodes Y _{i + 1,} i.e., it is possible to prevent the occurrence of crosstalk.

Specifically, as shown in FIGS. 4A and 4C, the first electrode X _i and the first electrode X _{i + 1} in the sustain period.
And the phases of the pulses applied to them are opposite. Immediately after the switching from the address period to the sustain period, the pulse phase is not reversed for synchronization, but thereafter, the sustain pulse is controlled so that the phase is reversed. Similarly, as shown in FIGS. 4B and 4D, the phases of the pulses applied to the second electrode Y _i and the second electrode Y _{i + 1} are also reversed. .

Here, in the present embodiment, the value of the external sustain voltage V _sus when driving the panel 1 is set so as to satisfy the following relationship. V _fsa <V _wsa <V _fas (2) V _fssa <V _sus + V _wss <V _fss (3) where V _wsa is a wall voltage between the second electrode Y and the third electrode A. At this time, V _{w ss} ≒ V _sus, since it is V _wsa ≒ V _sus, the above equation (2), (3), _{respectively, V fsa <V sus <V} fas (2 ') V fssa / 2 <V sus <V _fss / 2 (3 ′).

As shown in FIG. 4, a bias voltage of -V _sus is applied to the sustain pulse of the second electrode Y. This is to ensure that a preliminary discharge using the second electrode Y side as a cathode in the first pulse of the sustain period is started. By applying such a sustain pulse, a discharge between the first electrode X and the second electrode Y is induced by a preliminary discharge between the second electrode Y and the third electrode A with the second electrode Y serving as a cathode, discharge is initiated in a conventional discharge starting voltage V _fss lower than voltage V _FSSA. In this embodiment, V _fss -V _fssa = 720
A voltage drop of V-450V = 270V was realized.

In FIG. 4, a period t ₁ in the sustain period is shown.
In, the electrode pair of the i-th row, since the second electrode Y _i has a negative polarity with respect to the third electrode A, and the second electrode Y _i and the third electrodes A second electrode Y _i and cathode preliminary discharge occurs between the first electrode by the predischarge X _i and the second electrode Y _i
A discharge between the two is induced. During this time, in the electrode pair on the (i + 1) -th row, the first electrode X _{i + 1} has a negative polarity with respect to the third electrode A, so that the first electrode X _{i + 1} having the first electrode X _{i + 1} as a cathode is used.
A preliminary discharge occurs between _{i + 1} and the third electrode A, and a discharge between the first electrode X _{i + 1} and the second electrode Y _{i + 1} is induced by the preliminary discharge. In the next period t _2, the electrode pair of the i-th row, since the first electrode X _i becomes negative relative to the third electrode A, and the first electrode X _i and the first electrode X _i to the cathode first preliminary discharge occurs between the third electrode a, the discharge between the first electrode X _i and the second electrode Y _i is induced by this discharge. After that, in each discharge cell, the discharge (main discharge) between the first electrode X and the second electrode Y is repeated while the first electrode X or the second electrode that causes the preliminary discharge with the third electrode A is switched. It is.
Thus, the display discharge including the preliminary discharge and the main discharge is maintained.

As described above, in the sustain period, the sustain pulse having the opposite phase is applied between the electrodes belonging to the even-numbered rows and the electrodes belonging to the odd-numbered rows. And the electrode Y are always at the same potential. Thus, crosstalk between discharge cells is completely prevented during the sustain period.

In the present embodiment, the first electrode X and the second electrode Y are constantly discharged during the sustain period by the preliminary discharge generated between the first electrode X or the second electrode Y and the third electrode A (that is, the auxiliary discharge gap). Since the discharge occurs even in the main discharge gap between the electrode Y and the main panel, the panel of the present embodiment having a wide main discharge gap can be easily driven as compared with the conventional panel in which the sustain discharge is generated only between the main discharge gaps. Can be.

As described above, it is possible to obtain an AC-type plasma display panel in which the luminous efficiency is increased while suppressing an increase in the drive voltage of each electrode and the occurrence of crosstalk.

In the above embodiment, the first electrode,
The second electrode, even number, odd number, and the like are set for the sake of convenience, and the basic operation is exactly the same even if they are interchanged. Further, the applied voltage waveform in the initialization period does not necessarily need to be the same as that in the above-described example, and may be any as long as wall charges for facilitating subsequent sustain discharge are formed in the address period. Furthermore, the initialization period, the address period, and the sustain period do not need to be separated from each other as in this embodiment, and the respective periods may overlap each other.

[0043]

According to the present invention, in an AC plasma display device in which the distance between the first electrode and the second electrode is widened, the distance between the first electrode and the second electrode in the same discharge cell and the distance between the adjacent cells are reduced. Even when the distance between the first electrode and the second electrode is substantially equal, crosstalk between the first electrode and the second electrode during the sustain period can be prevented. As a result, it is possible to realize an AC plasma display device with improved luminous efficiency without deteriorating image quality.

[Brief description of the drawings]

FIG. 1 is a sectional view of an AC plasma display panel according to the present invention.

FIG. 2 is a diagram showing an arrangement of electrodes of an AC type plasma display panel according to the present invention and a drive circuit for driving them.

FIG. 3 is a diagram showing a distance between first and second electrodes of the AC type plasma display panel according to the present invention.

FIG. 4 is a view for explaining a drive voltage waveform of each electrode of the AC plasma display panel according to the first embodiment.

FIG. 5 is a cross-sectional view of a conventional AC plasma display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 AC type plasma display panel 2 Discharge space 3 1st glass substrate 4 2nd glass substrate 5 Dielectric layer 6 Protective layer 10 Partition 11 Fluorescent substance 31x 1st electrode drive circuit 31y 2nd electrode drive circuit 31a 3rd electrode drive Circuit X First electrode Y Second electrode A Third electrode C Discharge cell

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Koji Ito 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Terms (reference) 5C040 FA01 FA04 GB03 GB14 LA10 MA03 MA20 5C080 AA05 BB05 DD03 DD10 DD30 EE29 FF12 GG12 HH02 HH04 JJ02 JJ04 JJ06

Claims (5)

[Claims] 1. Two substrates are opposed to each other with a partition wall interposed therebetween, and a plurality of rows of first electrodes and second electrodes covered with a first dielectric layer are alternately arranged on one of the substrates in a row direction. And a third electrode group covered with a second dielectric layer is formed on the other substrate in the column direction, and the first electrode and the second electrode
The distance between the electrodes is set wider than the distance between the first electrode and the third electrode, and one discharge cell is formed at the intersection of the three electrodes. , And in the sustain period, the display cell between the first electrode, the second electrode, and the third electrode is repeatedly subjected to display discharge between the discharge cells to which data is written during the address period, thereby maintaining the light emission of the discharge cells. A plasma display device, wherein a display discharge of each time in the sustain period is triggered by a pre-discharge generated between a first electrode and a third electrode for a discharge cell belonging to a certain row. Electrode driving means for driving each of the discharge cells belonging to the adjacent row is provided so as to generate a trigger by a preliminary discharge generated between the second electrode and the third electrode. The electrode driving means drives each of the electrodes such that an electrode that causes a preliminary discharge with a third electrode in each discharge cell is alternately switched to a first electrode or a second electrode for each display discharge. An AC plasma display device characterized by repeating display discharge. 2. An amplitude of a voltage pulse applied to a first electrode and a second electrode for causing the display discharge in the sustain period is equal to that of a first electrode or a second electrode having a first dielectric layer as a cathode. Greater than the firing voltage between the third electrode and
The discharge starting voltage between the first electrode and the second electrode when a discharge exists between the first electrode or the second electrode and the third electrode is larger than one half of a discharge starting voltage between the first electrode and the second electrode. 2. The AC plasma display device according to 1. 3. An amplitude of a voltage pulse applied to the first electrode and the second electrode during the sustain period is equal to the first pulse.
3. The AC type plasma display device according to claim 1, wherein the discharge start voltage between the electrode and the second electrode is set to be smaller than one half. 4. An amplitude of a voltage pulse applied to the first electrode and the second electrode during the sustain period is equal to the third pulse.
The discharge starting voltage between the first electrode or the second electrode and the third electrode when the electrode is a cathode is set to be smaller than the discharge starting voltage. 5. The AC type plasma display device according to any one of the above. 5. A plurality of rows of first electrodes and second electrodes covered with a first dielectric layer alternately arranged in a row direction on one of the substrates, with two substrates facing each other with a partition wall interposed therebetween. And a third electrode group covered with a second dielectric layer is formed on the other substrate in the column direction, and the first electrode and the second electrode
The distance between the electrodes is set wider than the distance between the first electrode and the third electrode, and one discharge cell is formed at the intersection of the three electrodes. , And in the sustain period, the display cell between the first electrode, the second electrode, and the third electrode is repeatedly subjected to display discharge between the discharge cells to which data is written during the address period, thereby maintaining the light emission of the discharge cells. A driving method of the plasma display device, wherein the display discharge of each time in the sustain period is triggered by a preliminary discharge generated between a first electrode and a third electrode for a discharge cell belonging to a certain row, For a discharge cell belonging to a row adjacent to a certain row, a pre-discharge generated between the second electrode and the third electrode is generated as a trigger. 3. The driving method of an AC type plasma display device according to claim 1, wherein the display discharge is repeated while alternately switching an electrode which causes a preliminary discharge with the third electrode to the first electrode or the second electrode for each display discharge.