JP2002351398A - Driving method of plasma display panel - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a driving method for a plasma display panel used for image display of a computer, a television, or the like, which stabilizes a writing discharge at a high speed and enables high-speed scanning without displaying a non-light. is there. SOLUTION: Immediately before applying a scan pulse to a scan electrode during a write period, a positive preliminary pulse is applied to the scan electrode to attract residual charged particles of the write discharge up to that time, and to generate initial electrons of the write discharge. By doing so, it is possible to provide a driving method capable of causing writing discharge at high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for driving a plasma display panel used for a television or a monitor.

[0002]

2. Description of the Related Art FIG. 2 is a perspective view of an AC surface discharge type plasma display panel. In the plasma display panel 1, a front substrate 2 made of glass and a rear substrate 3 made of glass are used.
Are arranged to face each other, and a gas that emits ultraviolet rays by discharge, such as neon and xenon, is sealed in the gap. On the front substrate 2, an electrode group consisting of a pair of scan electrodes 4 and sustain electrodes 5 forming a pair covered with a dielectric layer 6 and a protective layer 7 is arranged in parallel in the row direction.

The scanning electrode 4 and the sustaining electrode 5 are respectively
Metal busbars 4a, 5a and transparent electrode 4 for increasing conductivity
b, 5b. Transparent electrodes 4b, 5b
Has the function of spreading the discharge and causing the discharge to occur in a larger volume.

On the back substrate 3, strip-shaped write electrodes 11 covered with a second dielectric layer 10 are arranged in parallel to each other in a column direction orthogonal to the scan electrodes 4 and the sustain electrodes 5.
Further, a strip-shaped partition wall 8 for isolating each write electrode 11 and forming a discharge space is provided between the write electrodes 11. In addition, the barrier ribs 8 are formed on the second dielectric layer 10.
The phosphor layer 9 is formed over the side surface of the substrate.

[0005] The panel 1 is designed to view an image display from the front substrate 2 side, and the fluorescent layer 9 is formed by ultraviolet rays generated by the discharge between the scan electrode 4 and the sustain electrode 5 in the discharge space. It excites and uses the visible light from the phosphor layer 9 for display light emission.

[0006] Such a plasma display panel 1
Will be described with reference to FIG.

FIG. 8 shows an example of a voltage waveform applied to each of the scanning electrode 4, the sustain electrode 5, and the writing electrode 11 and a waveform of a discharge current due to the driving method of the conventional plasma display panel. In FIG. 8, first, an initialization pulse Vset is applied to the scan electrode 4 during an initialization period.
The wall charges in the discharge cells of the panel are initialized, and in the latter half, the wall charges are adjusted so that the voltage applied to the discharge space between the scan electrodes 4 and the sustain electrodes 5 is close to the discharge starting voltage. I do.

Next, in the writing period, the bias voltage Vscan is applied to the scanning electrodes 4 other than the selected cells, and the bias voltage Vscan is removed from the selected cells. To apply a write pulse Vdata to generate a write discharge. By this write discharge, wall charges are accumulated on the surfaces of the dielectric layer 6, the protective layer 7, and the phosphor layer 9. A similar write operation is performed over the entire panel by sequentially applying a scanning pulse to each row, and cells to be displayed are selected.

Next, in order to perform the sustain discharge, the data electrode 1
1 is grounded, and a sustain pulse Vsus is alternately applied to the scan electrode 4 and the sustain electrode 5, so that in the cell in which the wall charges are accumulated, a discharge occurs due to the potential on the surface of the protective layer 7 exceeding the discharge starting voltage. During the period in which the sustain pulse is applied (sustain period), the main discharge of the display cell selected by the write pulse is maintained.

[0010]

In the case of a 42-inch VGA type plasma display panel, the number of rows is usually 48.
There are 0 rows. That is, during the writing period of FIG.
Are sequentially applied. If the panel is divided into upper and lower parts and the writing operation is performed simultaneously in the upper and lower parts, the scanning pulse can be reduced to half of 240.
1 must be separated from each other, and the circuit scale increases. On the other hand, in a high-definition plasma display panel, the number of rows further increases, and SVGA
The type has 600 lines, and the XGA type has 768 lines. Therefore, how to perform the writing operation at high speed and shorten one scanning pulse is a major issue for achieving higher definition.

The pulse width of the scan pulse must be set so that all the discharge cells that should generate a write discharge perform a discharge operation while the pulse is being applied.

There is usually a time difference of several hundred ns from the application of the scanning pulse and the writing pulse to the occurrence of discharge. This is called a formation delay time. Furthermore, the time actually delayed by the initial state of discharge varies statistically,
Do an exponential distribution. Therefore, in order to cause a write discharge in a time as short as possible, it is necessary to make the distribution constant of the exponential distribution as short as possible.

If the scan pulse width is too short or the statistical variation is too large, a discharge cell in which writing discharge cannot occur while the scan pulse is applied is generated, and a non-lighting cell or a discharge cell is generated. This results in a defective display such as flicker.

[0014]

In order to solve the above problems, a driving method of a plasma display panel according to the present invention is directed to a first method in which a scan electrode and a sustain electrode covered with a dielectric layer are formed in parallel with each other. Driving a plasma display panel in which a substrate and a second substrate on which a writing electrode covered with a phosphor layer is formed in a direction orthogonal to the first electrode are arranged to face each other with a discharge space interposed therebetween; , A driving method for a plasma display panel having a writing period and a sustaining period, wherein in the writing period, a preliminary pulse applied in a polarity opposite to that of the scanning pulse immediately before the application of the scanning pulse is provided. Thereby, the writing operation can be sped up and a high definition panel can be handled.

According to another aspect of the present invention, there is provided a driving method of a plasma display panel according to the present invention, wherein the scanning pulse is a negative pulse, the preliminary pulse is a positive pulse, and the voltage of the preliminary pulse is The voltage is higher than the voltage applied to the row to which the scan pulse is not applied during the writing period. Thereby, the writing operation can be sped up and a high definition panel can be handled.

According to another aspect of the present invention, there is provided a driving method of a plasma display panel according to the present invention, in which scanning in a writing period is sequentially performed one row at a time. It is assumed that the scan pulse is applied from the period during which the scan pulse is applied to either the (n-1) th row or the (n + 1) th row until immediately before the scan pulse is applied to the nth row. Thereby, the writing operation can be sped up and a high definition panel can be handled.

According to another aspect of the present invention, there is provided a driving method of a plasma display panel according to the present invention, in which a scan in a writing period is performed every other row, and a preliminary pulse applied to a pixel in a certain n-th row includes n-2) row or (n)
+2) It is assumed that the scan pulse is applied from a period during which the scan pulse is applied to any of the rows to a time immediately before the scan pulse is applied to the n-th row. Further, it is assumed that the potential applied to the sustain electrode during the writing period is different between odd-numbered rows and even-numbered rows. As a result, the writing operation can be sped up, a high definition panel can be supported, and stable image display can be performed while suppressing crosstalk.

According to another aspect of the present invention, there is provided a method for driving a plasma display panel, wherein a preliminary pulse is applied from the beginning of a writing period until a scanning pulse is applied. Thereby, the writing operation can be sped up and a high definition panel can be handled.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

(Embodiment 1) FIG. 1 shows voltage waveforms for realizing a driving method according to a first embodiment of the present invention. FIG.
Shows only the writing period of the conventional waveform (FIG. 8). The period other than the writing period may be the same as the conventional waveform. N represents the total number of rows. 1, the number of scanning pulses is equal to the number N of rows. However, if the panel is divided into two or more parts, for example, upper and lower parts, and the writing operation is performed simultaneously in each part, the number of scanning pulses is reduced accordingly. In that case, N is the number of rows of one of the divided parts.

A feature of the present embodiment is that a preliminary pulse is applied before a scanning pulse applied to each row during a writing period.

Prior to the start of the writing period, a negative wall charge, the dielectric layer 6 on the sustain electrode 5, and the writing electrode Positive wall charges are accumulated on the phosphor layer 9 covering the surface 11, and the discharge space is substantially maintained at the discharge starting voltage. If a positive write pulse (voltage Vdata) is applied to the write electrode 11 in this state, a write discharge occurs.

Since the write electrode 11 extends in the column direction and is common to cells belonging to the same column, a bias voltage is applied to a row other than the row where a write operation is to be performed so that a write discharge does not occur by mistake. It is necessary to put on.
That is, a positive voltage Vscan is applied to the scan electrode 4 so as to cancel the wall charges near the scan electrode 4. Vsc
The row to which an is not applied, that is, in other words, Vsca
From the state where n is applied, a write discharge occurs in a discharge cell in a row where a negative scan pulse is applied and the ground potential is reached, and in a column where a positive write pulse is applied to the write electrode 11, The necessary wall charges are formed during the sustain period, and the cells to be turned on are selected.

In the waveform of the present embodiment, a pulse of a voltage Vpr higher than Vscan is applied immediately before the application of the scan pulse.

As shown in FIG. 1, for example, immediately before the scanning pulse is applied to the second row, the scanning pulse is applied to the first row, which is the row immediately above the second row. It is the gist of the present invention to apply the preliminary pulse during that period.

In other words, generally speaking, immediately before a scan pulse is applied to a certain row, a preliminary pulse is applied during a period in which a scan pulse is applied to an adjacent row.

At this time, as shown in FIG. 1, the scanning pulse must be sequentially applied to each row. The scanning may be performed sequentially from the N-th row, which is the bottom row, in the reverse order of FIG.

In order to explain the effect of the present invention and its principle, the instability of write discharge will be described.

After applying a voltage to each electrode of the discharge cell,
Before the discharge, the initial electrons are ionized and multiplied while ionizing the discharge gas particles, and the ions and the like are deposited on the cathode surface (in this case, the surface of the dielectric layer 6 covering the scanning electrode 4; By forming secondary electrons by colliding with the protective layer 7), it takes time until the current flowing between the anode and the cathode sharply increases. This time is called a discharge forming time. In addition, since the distribution and energy state of the initial electrons are different each time, the discharge forming time is not always the same every time.

Let p be the probability that one electron will be discharged through the above process per unit time, and let n0 be the initial number of electrons. Now, assuming that the number of discharge cells in which discharge has not yet occurred among N0 discharge cells (this can be said to be the number of trials of discharge N0) is N (t), the surviving equation (number From 1), N (t) is represented as (Equation 2).

[0031]

(Equation 1)

[0032]

(Equation 2)

Since N (t) is the number of discharge cells that have not been discharged, the probability P (t) that discharge occurs at time t is:
An exponential distribution of (Equation 3) is shown.

[0034]

(Equation 3)

The expression (or P
(Time integral of (t)) represents the probability that a discharge will occur by a certain time t, and the required scanning pulse width is obtained from this equation. Here, tf is the origin of the time axis, but from the viewpoint of discharge, it can be said that it is the minimum time required for discharge, which is determined by the structure of the discharge cell, and is called the formation delay time. The characteristic time of the exponential distribution, ts≡1 / (n0 · p), is
The phenomenon is observed as a degree of variation in discharge, and is called a statistical delay time.

The time required for the write discharge, that is, the pulse width of the scan pulse is determined from these characteristic values determined from the structure of the discharge cell and the gas conditions.

For example, when the formation delay time tf is 500 ns
Assuming that the statistical delay time ts is 100 ns, 9
In order for writing discharge to occur in 9.9% of the cells, a value is substituted into (Equation 3) and integrated by time to obtain 119.
It is determined that 0 ns is required. That is, a pulse width of 1.2 μs is required.

When driving a high-definition panel, the number of rows to be scanned inevitably increases, so that high-speed scanning is required. In the above example, it is found that 700 ns, which is 60% of the time 1.2 μs obtained as the pulse width, is spent on the time of statistical variation, and how to reduce this value is an issue.

From the definition of the statistical delay time ts, it can be shortened by increasing the probability p that one electron will be discharged per unit time or increasing the initial number of electrons n0. Understand.

According to the experimental results, the one-digit statistical delay time ts is smaller in the case of displaying the full image than in the case of displaying the full image and the case of displaying the isolated point. This is probably because, by displaying the entire image, many priming particles (initial electrons) exist before the writing discharge occurs, and the statistical delay time ts is reduced.

In the present invention, high speed writing is realized by applying this and increasing n0.

The principle will be described with reference to FIG. FIG. 3A schematically shows a write discharge by the conventional driving method, and is shown in a cross-sectional view along the write electrode 11. One discharge cell is formed by a set of the scan electrode 4 and the sustain electrode 5. In the figure, cells in row L1 and cells in row L2 are shown, and scan electrode 4-1 and sustain electrode 5-1 scan row L1, scan electrode 4-2 and sustain electrode 5
-2 form the row L2. For simplicity, the distinction between the transparent electrode and the bus electrode is omitted.

FIG. 3A shows a voltage relationship and a discharge state at the time of scanning the row L1.
By the writing period, wall charges are adjusted between the scanning electrode 4 and the sustaining electrode 5 and between the scanning electrode 4 and the writing electrode 11 on the dielectric layer covering the respective electrodes so that the discharge starting voltage is obtained.

The scanning electrode 4 of the cell where the writing discharge is to be performed
At −1, a scanning pulse is applied, that is, the bias voltage Vscan is removed to become the ground potential, and at the same time, a positive writing pulse is applied to the writing electrode 11. As a result, discharge starts between the scanning electrode 4-1 and the writing electrode 11 with a polarity such that the scanning electrode 4-1 is used as a cathode. Triggered by this discharge, the scan electrode 4-
1 and the sustain electrode 5-1 also starts discharging. Also at this time, the polarity is such that the scan electrode 4-1 is a cathode and the sustain electrode 5-1 is an anode. The direction indicated by the arrow in the figure is the direction in which the electrons move. The electrons move from the scanning electrode 4-1 as the cathode toward the writing electrode 11 and the sustaining electrode 5-1 and accumulate in the dielectric layer 6 and the phosphor layer 9 to form wall charges. Even after the discharge is completed, there are residual charged particles in the space, but the electrons move to a higher potential and the positive ions move to a lower potential on the lines of electric force in the discharge space. This movement occurs until the electric field in the discharge cell is completely canceled.

During this write discharge, the row L
The bias voltage Vscan is applied as it is to the scan electrodes 4 in rows other than 1, for example, the scan electrode 4-2 in row L2 in the drawing. Since the write electrode 11 is common to the cells adjacent in the column direction, discharge occurs between the scan electrode 4-2 and the write electrode 11 without this bias voltage. As described above, since the purpose of the bias voltage is to prevent discharge in a row that is not scanned, a high voltage is not required, and a bias voltage of 100 V or less is sufficient.

FIG. 3B is a schematic diagram of a write discharge according to the present invention. As in FIG. 3A, the write electrode 11
FIG. In the present invention, row L
When a write discharge of 1 occurs, an adjacent row L
A voltage Vpr higher than the bias voltage Vscan is applied to the second scan electrode 4-2. As a result, a part of the electrons generated in a large amount by the write discharge generated in the row L1 and the residual electrons remaining in the discharge space even after the write discharge ends are drawn to the vicinity of the scan electrode 4-2. Can be. Even if these electrons form wall charges on the dielectric layer on the scan electrode 4-2, the scan electrode 4-2 is not
When a write discharge occurs in the above, it acts as a cathode, and the wall charge acts to strengthen the electric field.

The electrons attracted to the vicinity of the scanning electrode 4-2 act as priming particles when a writing discharge occurs next in the row L2. These electrons are supplied to the scanning electrode 4-2.
Electrons emitted when a negative scanning pulse is applied to
Together with secondary electrons emitted by the collision of ions and gas atoms with the cathode, the particles collide with gas particles and perform ionization multiplication to generate plasma and start discharge. That is, the electrons attracted to the vicinity of the scanning electrode 4-2 by the configuration of the present invention increase n0 in (Equation 3), and the row L2 causes a stable writing discharge with a short statistical delay time. Can be.

For example, by applying a pulse of 20 V as Vpr, the statistical delay time of the same panel is 5 times.
0 ns. Using (Equation 3), the write pulse width for realizing a write probability of 99.9% is 345 ns.
It can be seen that it can be shortened.

The present invention also has the effect of preventing the outflow of wall charges as described below.

For example, a cell belonging to the row L2 waits for a scan pulse to be applied while a wall discharge is maintained during the initialization period while a write discharge occurs in the row L1. If this row is later in the scanning order, the time will be longer. In the meantime, a write pulse is applied to the write electrode 11 as needed in accordance with the display of the row scanned during that time, and a potential difference is created between the write electrode 11 and the sustain electrode 4-2. Since the bias voltage Vscan is applied to the scan electrode 4-2, this potential difference does not start discharging, but a small amount of wall charge is generated from the dielectric layer 6 on the scan electrode 4-2 in the form of a dark current. It leaks out one by one. The longer the waiting time until the scanning pulse is applied, the larger the amount, and in some cases, the normal writing discharge cannot be performed in the cells of the row L2. This phenomenon causes a defective display by a non-lighted cell in a display image having a high lighting rate in a row to which a scanning pulse is applied late.

In the present invention, the positive voltage Vpr is applied to the row L2 while the scanning pulse is applied to the row L1, so that the potential difference between the writing electrode 11 and the scanning electrode 4-2 is small. Also, the amount of charge flowing out is small.

(Embodiment 2) FIG. 4 shows a driving method according to a second embodiment of the present invention.

The most significant feature of the present embodiment is that the scanning pulse is applied every other row.
In this case, the same applies in that the preliminary pulse is applied immediately before the application of the scan pulse. However, for example, immediately before the scan pulse is applied to the third row, the scan pulse is applied to the first row instead of the adjacent row and the second row. In other words, the residual charged particles of the write discharge in the discharge cell adjacent to the second row are used. The shape of the drive waveform to be applied is the same as that of the first embodiment except for the order in which the scan pulse is applied.

Applying a scan pulse every other row has the following effects.

In the write discharge, a discharge occurs between the scan electrode 4 and the write electrode 11, and the discharge is generated between the scan electrode 4 and the sustain electrode 5 by using the priming as a priming. When the electric discharge is made to evolve, the electric discharge sometimes evolves toward the wrong electrode. This is called crosstalk, and causes a defective display such as an unlit cell or a bright spot.

This phenomenon is remarkable in the case of an arrangement in which the order of the scanning electrodes 4 and the sustaining electrodes 5 is switched in the adjacent rows. FIG. 5 shows the types of electrode arrangement. FIG. 5 is a view of the panel as viewed from the display surface side, and shows only the scan electrodes 4, the sustain electrodes 5, the write electrodes 11, and the barrier ribs 8. FIG.
5A, the scanning electrodes 4 and the sustaining electrodes 5 are arranged in the same order in all the rows, and are called sequential arrangements. On the other hand, FIG.
(B) shows an arrangement in which the arrangement order of the scan electrodes 4 and the sustain electrodes 5 is inverted for each row, for example, in the cell A and the cell B in the figure, and is called an inverted arrangement.

When the sequential arrangement is compared with the inverted arrangement, since the capacitance between the entire scanning electrode 4 and the entire sustaining electrode 5 is smaller in the inverted arrangement, the reactive power consumed regardless of the image display pattern is reduced. Become smaller. This is because the amount of charge movement in the pulse during the sustain period mainly consumed as reactive power depends on the capacitance between the entire scan electrode 4 and the entire sustain electrode 5. One scanning electrode 4 in sequence
Are adjacent to two sustain electrodes 5, while the inverted arrangement is such that one scan electrode 4 has one sustain electrode 5 and one sustain electrode 5.
It is adjacent only to the scanning electrodes 4. Since the two scanning electrodes 4 have the same potential, even when a voltage is applied to the scanning electrodes 4, the movement of charges between them is very small. As a result, the capacitance becomes small in the inverted arrangement.

In the case of the inverted arrangement, crosstalk is likely to occur in the write discharge. This crosstalk occurs as follows.

This will be described with reference to FIG. Consider a write discharge in a certain row formed by scan electrode 4-2 and sustain electrode 5-2. The write discharge occurs between the scan electrode 4-2 and the write electrode 11, and the priming is used to cause a discharge between the scan electrode 4-2 and the sustain electrode 5-2. Becomes When the discharge progresses from scan electrode 4-2 to sustain electrode 5-2, the discharge proceeds from scan electrode 4-2 to sustain electrode 5-2 in an adjacent row maintained at the same potential as sustain electrode 5-2. Sustain electrode 5-
1 is arranged. Therefore, the write discharge may pass over the sustain electrode 5-2 and reach the sustain electrode 5-1 in the adjacent row. This is the crosstalk of the write discharge, which is indicated by C in the figure. The same crosstalk is indicated by D in the figure. In the write discharge, the sustaining electrode 5 functions as an anode, and the charged particles traveling toward the sustaining electrode 5 are mainly electrons. Electrons have a higher velocity than other gas atoms due to their lower mass. Therefore, this cross talk occurs instantaneously.

In the present embodiment shown in FIG. 4, there is also an effect of preventing the crosstalk of the write discharge. That is, two types of drive waveforms to be applied to the sustain electrodes 5 are provided. That is, different drive waveforms are applied to the sustain electrodes 5 in the odd rows and the sustain electrodes 5 in the even rows. These two drive waveforms respectively apply the potential Ve to the sustain electrode 5 when the scan pulse is applied to the scan electrode 4 in the row, and apply the potential Ve to the scan electrode 4 in the adjacent row when the scan pulse is applied to the scan electrode 4 in the adjacent row. Sustain electrode 5 is given a potential Veo lower than Ve. In the case of FIG. 4, the scan pulse is applied to the odd-numbered row in the first half of the writing period, and the even-numbered row is applied to the second half of the writing period.
Ve is applied in the first half of the writing period and Veo is applied in the second half. In the even-numbered row, the opposite is true.
o and Ve in the latter half.

With this configuration, for example, when a write discharge occurs in the third row, the potential of the sustain electrodes 5 in the second row is different from that of the sustain electrodes 5 in the third row. It does not extend to the electrode 5.

This crosstalk occurs particularly remarkably in the case of the inverted arrangement, but may also occur in the case of the sequential arrangement. Again, the driving waveform of the present embodiment has an effect of preventing.

In the present embodiment, in addition to this,
The scanning pulse is applied every other row. The effect of preventing the crosstalk described above is effective even if the scanning pulse is applied one line at a time, but the potential of the sustain electrode 5 must be raised and lowered in synchronization with the timing of applying the scanning pulse. Power consumption and radiation noise. Therefore, by applying the scanning pulse every other row, the driving waveform applied to the sustain electrode 5 can be simplified as shown in FIG.

(Embodiment 3) FIG. 7 shows a drive waveform according to a third embodiment of the present invention. The concept of the effect of the present embodiment is the same as in the first and second embodiments.

In this case, the preliminary pulse is applied not only immediately before the scanning pulse but also during a period from the start of the writing period to the application of the scanning pulse. The voltage waveform is the same as the bias voltage difference between Vpr and Vscan (Vpr> Vscan) before and after the scanning pulse in the writing period. This is intended to effectively utilize not only the write discharge to which the scan pulse is applied immediately before but also the residual charged particles of the write discharge performed before that time.

This embodiment is also effective against the outflow of wall charges described in the first embodiment.

In the present embodiment, the driving method in which the scanning pulse is applied one row at a time as described in the first embodiment is applied to every other row as described in the second embodiment. Both driving methods can be applied. Further, the electrode arrangement to which the present embodiment is applied may be either a sequential arrangement or an inverted arrangement.

Note that, in the three embodiments of the present invention, the scanning pulse is applied in the order of one line at a time.
Although the scanning order of every other row has been described, it is also applicable to a method of scanning every two rows or a method of sequentially scanning from the bottom row, a method of scanning every other row from top to bottom, and then a method of scanning the remaining rows from bottom to top. Is possible, and the effect is the same. In this case, it is preferable that the preliminary pulse be applied just before the scanning pulse is applied.

Further, in the present invention, the driving method other than the driving waveform during the writing period is arbitrary. If the driving method includes the writing period, the shape, voltage and frequency of the sustain pulse and the initialization waveform can be changed. It does not depend on the shape or the like. Further, in FIGS. 1, 4 and 7, the base potential of each electrode in the writing period, particularly the base potential of the scanning electrode 4, is set to the ground potential, but the present invention does not depend on this potential. A driving method in which the base potential in the writing period is set to a negative potential depending on the driving waveform in the initialization period or the like can be considered, but the present invention is also effective for such a driving method.

As a plasma display panel to which the present invention is applied, the structure of a well-known AC surface discharge type plasma display panel is shown in FIG. 2, but has a scanning electrode 4, a sustain electrode 5, and a writing electrode 11. , Dielectric layer 6
For example, if the panel is driven by accumulating wall charges, the shape of the partition wall 8 is a grid-like shape, or the scanning electrode 4 and the sustaining electrode 5 are composed of only the metal electrodes 4a and 5a without using the transparent electrodes 4b and 5b. The present invention can be applied to a plasma display panel such as the one described above, and the effect is the same.

[0071]

As described above, according to the present invention, by applying a preliminary pulse having a voltage Vpr higher than the bias voltage Vscan to the scan electrode 4 immediately before the scan pulse is applied to the scan electrode 4, stable and high-speed operation is achieved. As a result, a high-speed scanning can be performed without a non-light display or the like.

[Brief description of the drawings]

FIG. 1 is a diagram showing driving waveforms according to a first embodiment of the present invention.

FIG. 2 is a diagram of a plasma display panel.

FIG. 3A is a diagram showing the principle of write discharge; FIG. 3B is a diagram illustrating the effect of the present invention;

FIG. 4 is a diagram showing driving waveforms according to a second embodiment of the present invention.

FIG. 5 is a diagram illustrating types of electrode arrangements.

FIG. 6 is a diagram illustrating crosstalk in a write discharge.

FIG. 7 is a diagram illustrating driving waveforms according to a third embodiment of the present invention.

FIG. 8 is a diagram showing an example of a conventional drive waveform.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel 2 Front substrate 3 Back substrate 4 Scan electrode 5 Sustain electrode 4a, 5a Metal bus 4b, 5b Transparent electrode 6 Dielectric layer 7 Protective layer 8 Partition wall 9 Phosphor layer 10 Second dielectric layer 11 Write electrode

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) G09G 3/20 G09G 3/20 624L 624 3/28 B 3/28 E (72) Inventor Nobuaki Nagao Osaka 1006 Kadoma Kadoma Matsushita Electric Industrial Co., Ltd. (72) Inventor Yusuke Takada 1006 Kadoma Kadoma, Osaka Prefecture F term in Sangyo Co., Ltd. (reference) 5C080 AA05 BB05 DD06 DD07 DD08 DD09 DD10 EE17 GG08 JJ04 JJ06

Claims (11)

[Claims] A first substrate in which a scan electrode and a sustain electrode covered with a dielectric layer are formed parallel to each other in a row direction;
It drives a plasma display panel in which a writing electrode covered with a phosphor layer and a second substrate formed in a column direction are opposed to each other with a discharge space interposed therebetween, and has an initialization period, a writing period, and a sustaining period. A method for driving a plasma display panel, comprising a preliminary pulse applied in a polarity opposite to that of a scan pulse immediately before a scan pulse is applied during the writing period. 2. The method according to claim 1, wherein the scan pulse is a negative pulse,
2. The method according to claim 1, wherein the preliminary pulse is a positive pulse. 3. The method according to claim 1, wherein a potential of the preliminary pulse is higher than a potential of a row to which the scan pulse is not applied during the writing period. 4. A first substrate in which a scan electrode and a sustain electrode covered with a dielectric layer are formed in parallel with each other in a row direction;
It drives a plasma display panel in which a writing electrode covered with a phosphor layer and a second substrate formed in a column direction are opposed to each other with a discharge space interposed therebetween, and has an initialization period, a writing period, and a sustaining period. A method for driving a plasma display panel, comprising a preliminary pulse applied in a polarity opposite to that of a scan pulse immediately before a scan pulse is applied in the writing period, wherein the preliminary pulse applied to a pixel in a certain n-th row Is the (n-1) th row or the (n + 1) th row
A method for driving a plasma display panel, wherein the scan pulse is applied from a period during which the scan pulse is applied to one of the rows to a time immediately before the scan pulse is applied to the n-th row. 5. The driving method of a plasma display panel according to claim 4, wherein a scanning order in the writing period is to sequentially scan one line at a time. 6. A plasma display panel driven by the driving method according to claim 4 or 5, wherein the arrangement of the scan electrodes and the sustain electrodes is equal in all rows. 7. A first substrate in which a scan electrode and a sustain electrode covered with a dielectric layer are formed parallel to each other in a row direction,
It drives a plasma display panel in which a writing electrode covered with a phosphor layer and a second substrate formed in a column direction are opposed to each other with a discharge space interposed therebetween, and has an initialization period, a writing period, and a sustaining period. A method for driving a plasma display panel, comprising a preliminary pulse applied in a polarity opposite to that of a scan pulse immediately before a scan pulse is applied in the writing period, wherein the preliminary pulse applied to a pixel in a certain n-th row Is the (n-2) th row or the (n + 2) th
A method for driving a plasma display panel, wherein the scan pulse is applied from a period during which the scan pulse is applied to one of the rows to a time immediately before the scan pulse is applied to the n-th row. 8. The driving method for a plasma display panel according to claim 7, wherein the order of scanning in the writing period is every other row. 9. The driving method of a plasma display panel according to claim 7, wherein the potential applied to the sustain electrode in the writing period is different between an odd-numbered row and an even-numbered row. 10. A plasma display panel driven by the driving method according to claim 7, wherein an arrangement of the scan electrodes and the sustain electrodes is inverted between odd rows and even rows. A plasma display panel characterized by the above-mentioned. 11. A first substrate in which scan electrodes and sustain electrodes covered with a dielectric layer are formed parallel to each other in a row direction, and a first substrate in which write electrodes covered with a phosphor layer are formed in a column direction. A driving method for driving the plasma display panel in which the two substrates are opposed to each other with a discharge space therebetween, and including an initialization period, a writing period, and a sustaining period, wherein the scanning is performed during the writing period. A method for driving a plasma display panel, wherein a voltage applied before applying a scanning pulse to an electrode is higher than a voltage applied after applying the scanning pulse.