JP2002373590A - Plasma display panel and its driving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent cross talks both in writing period and maintenance period by sequentially arranging a scanning electrode and a maintenance electrode, and by applying the same voltage waveform to the scanning electrode belonging to the odd numbered rows and to the maintenance electrode belonging to even numbered rows in the maintenance period, and by applying the same voltage waveform to the scanning electrode belonging to the even numbered rows and to the maintenance electrode belonging to the odd numbered rows. SOLUTION: By sequentially arranging the scanning electrode and the maintenance electrode, and by applying the same voltage waveform to the scanning electrode belonging to the odd numbered rows and to the maintenance electrode belonging to the even numbered rows and by applying the same voltage waveform to the scanning electrode belonging to the even numbered rows and the maintenance electrode belonging to the odd numbered rows, the cross talk both in writing period and maintenance period can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a plasma display panel, a method of driving the same, and an image display device using the same.

[0002]

2. Description of the Related Art FIG. 2 is a perspective view of an AC surface discharge type plasma display panel (hereinafter referred to as a panel). As shown in FIG. 2, in the panel 1, a front substrate 2 made of glass and a rear substrate 3 made of glass are arranged to face each other.
For example, neon and xenon are enclosed. 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 dielectric layer 6 are arranged in parallel with each other in a column direction orthogonal to the scan electrodes 4 and the sustain electrodes 5. And a strip-shaped partition 8 for forming a discharge space is provided between the write electrodes 11. Further, a phosphor layer 9 is formed from the dielectric layer 6 to the side surface of the partition 8.

[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.

One scan electrode 4 and one sustain electrode 5, 1
A region including the write electrodes 11 and sandwiched between the two partition walls 8 is one discharge cell. Three discharge cells that emit red, blue, and green visible light form one set to form one pixel. For example, in the case of a wide VGA type display, the number of pixels is 400,000, and the number of discharge cells is three times that of the display.
200,000 are arranged.

[0007] There are two possible orders for the arrangement of the scan electrodes 4 and the sustain electrodes 5. One is a method of alternately arranging the scanning electrodes 4 and the sustaining electrodes 5 as shown in FIG. 3A (referred to as a sequential arrangement), and the other is a method as shown in FIG. And a method of alternately arranging two scan electrodes and two sustain electrodes (referred to as an inverted arrangement), for example, the configuration of which is disclosed in Japanese Patent Application Laid-Open No. 9-120777. Discharge cells are represented by dotted lines in the figure. In the case of the sequential arrangement, the positional relationship between scan electrode 4 and sustain electrode 5 is equal in all discharge cells. On the other hand, in the case of the inverted arrangement, the positional relationship between the scan electrode 4 and the sustain electrode 5 is inverted between adjacent cells in the column direction, for example, cell A and cell B in the drawing.

[0008] In contrast to the sequential arrangement, in the inverted arrangement, the number of adjacent scan electrodes 4 and sustain electrodes 5 is half, so that the potential difference between scan electrodes 4 and sustain electrodes 5 causes these electrodes to be separated. Less charge is transferred to charge the overlying dielectric. Therefore, there is an advantage that reactive power not directly related to light emission can be reduced.

Further, these arrangements are characterized by so-called crosstalk in which discharge is erroneously performed between adjacent cells, and one problem is an advantage of the other. This will be described later.

Next, a conventional panel driving method will be described with reference to FIG.

FIG. 12 shows an example of a voltage waveform applied to each of the scan electrode 4, the sustain electrode 5, and the write electrode 11 to drive a conventional panel. In FIG. 12, first, an initialization pulse Vset is applied to the scan electrode 4 to initialize the wall charges in the discharge cells of the panel, and the voltage applied to the discharge space between the scan electrode 4 and the sustain electrode 5 causes the discharge to start. Wall charges are formed so as to be close to a voltage.
The bias voltage Vs is applied to the scan electrodes 4 other than the cell to be selected next.
Applying a bias voltage V to the selected cell
A negative pulse (referred to as a scanning pulse) that changes from scan to the ground potential is applied, and at the same time, a write pulse Vdata is applied to the write electrode 11 to cause a write discharge. By this writing discharge, wall charges are accumulated on the surfaces of the dielectric layer 6, the protective layer 7, and the phosphor layer 9. Similarly, by sequentially applying a scan pulse to each scan electrode 4 and applying a write pulse corresponding to an image to be displayed to the write electrode 11 in synchronization with the scan pulse, a write operation is performed over the entire panel and a cell to be displayed is selected. I do.

Next, in order to perform the sustain discharge, the write electrode 11 is grounded, and the sustain pulse Vsus is alternately applied to the scan electrode 4 and the sustain electrode 5, thereby causing the sustain discharge. In the cell in which the wall charges have been accumulated, a discharge occurs when the potential on the surface of the protective layer 7 exceeds the discharge start voltage, and the main discharge of the display cell selected by the write pulse during the sustain pulse is applied (sustain period). Is maintained.
In the discharge cells in which no write discharge has occurred, that is, unselected discharge cells have no accumulation of wall charges, and thus no sustain discharge occurs. After the sustain discharge, an erasing pulse Verase is applied to eliminate the wall charges, thereby performing erasing.

[0013]

The occurrence of an erroneous discharge between adjacent cells is called crosstalk. When crosstalk occurs, the wall cells required for the original discharge are erased, or the wall charges are accumulated in places that are not originally required. A discharge cell that should not be turned on may cause a display failure, for example.

There are two types of crosstalk. 1
The second is crosstalk that tends to occur during the maintenance period,
The other is crosstalk that easily occurs during the writing period. Both differ in the mechanism of generation.

The concept of these crosstalks will be described with reference to FIG. For simplicity, only four rows of scan electrodes 4, sustain electrodes 5, and write electrodes 11 are shown. The crosstalk in the sustain period causes a sustain discharge between adjacent cells as indicated by B and C in FIG. 4A. FIG. 4A shows an electrode arrangement of a sequential arrangement. One scan electrode 4-2 is connected to a sustain electrode 5-
1 and the sustain electrode 5-2. A normal discharge is a discharge that occurs with the sustain electrode 5-2, and is a discharge as indicated by A in the figure. However, if a discharge is caused by mistake with the sustain electrode 5-1, crosstalk as shown in C in the figure will occur. In the case of the inverted arrangement, since the scan electrode 4-1 is arranged at the position of the sustain electrode 5-1 in FIG. 4A, crosstalk hardly occurs.

On the other hand, the crosstalk during the writing period is, for example, as shown by C in FIG.
When the write discharge generated between the write electrode 2 and the write electrode 11 grows toward the sustain electrode 5-2, it erases the wall charges of the sustain electrode 5-1 of the adjacent cell having the same potential. . This crosstalk occurs even in the case of the sequential arrangement, and the mechanism is the same as the above-described sustain period crosstalk. However, in the case of an inversion arrangement as shown in FIG. 4B, even if the crosstalk does not become a complete discharge, the space charges move on the lines of electric force and the wall charges become abnormal. Crosstalk during the writing period is a phenomenon that is more likely to occur in the inverted arrangement because it causes accumulation, erasure, and the like.

If the inverted arrangement is adopted, crosstalk during the sustain period can be prevented, but crosstalk during the writing period is more likely to occur.

[0018]

In order to solve the above-mentioned problems, a driving method of a plasma display panel according to the present invention is characterized in that a scanning electrode for applying a scanning pulse and a sustain electrode for not applying the scanning pulse are alternately arranged in parallel. The plasma display panel in which the formed first substrate and the second substrate in which the write electrode is formed in a direction orthogonal to the first electrode and the second electrode are disposed to face each other, and the write period and the sustain period are reduced. A driving method comprising: between the scan electrodes belonging to cells adjacent in a direction perpendicular to the scan electrodes,
It is assumed that potentials in the sustain period are different. Also,
In particular, it is assumed that the drive voltage waveform applied in the sustain period is the same for a scan electrode belonging to an arbitrary cell and a sustain electrode belonging to a cell adjacent to the cell in a direction perpendicular to the scan electrode. Thus, crosstalk in both the sustain period and the write period can be prevented.

According to another aspect of the present invention, there is provided a method of driving a plasma display panel according to the present invention, wherein a cell belonging to an odd-numbered row and a cell belonging to an even-numbered row have the same direction of writing discharge in the writing period. The direction in which the sustain discharge spreads during the sustain period is opposite. Thus, crosstalk in both the sustain period and the write period can be prevented.

According to another aspect of the present invention, there is provided a method of driving a plasma display panel according to the present invention, wherein one of a cell belonging to an odd-numbered row and a cell belonging to an even-numbered row is a first set, and the other is a second set. The scan electrodes of the cells belonging to the first set, and the sustain electrodes, after the end of the writing period, while one sustain pulse is applied to the scan electrodes of the cells belonging to the second set, While maintaining the potential immediately after the end of the writing period, changing the potential of the first sustain electrode belonging to the second set in synchronization with the end of the sustain pulse of the first scan electrode belonging to the first set, The transition from the writing period to the sustain period is performed by applying a sustain pulse to the first scan electrode belonging to the second group in synchronization with the sustain pulse applied to the first sustain electrode belonging to the set. To. Thus, crosstalk in both the sustain period and the write period can be prevented.

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 timing of the sustain discharge in the sustain period in the cells belonging to the odd rows and the cells belonging to the even rows is reduced. It is assumed that there is a shift for one discharge. Thus, crosstalk in both the sustain period and the write period can be prevented.

In order to solve the above-mentioned problems, the plasma display panel of the present invention is driven by any of the above-described driving methods, and the scanning electrodes and the sustaining electrodes are respectively drawn to two different sides of the panel, and the driving circuit and the driving circuit are connected to each other. Shall be connected. Thus, crosstalk in both the sustain period and the write period can be prevented. In addition, the sustain electrode group drawn out to one side of the panel has a portion for electrically connecting the sustain electrodes belonging to the odd-numbered rows and the sustain electrodes belonging to the even-numbered rows. Thereby, the reliability of the connection between the panel and the circuit can be ensured, and the wiring resistance and impedance of the electrodes can be reduced.

According to another aspect of the present invention, there is provided a plasma display panel driven by any one of the above driving methods, wherein scan electrodes belonging to odd rows and sustain electrodes belonging to even rows are provided on one side of the panel. The sustain electrodes belonging to the odd-numbered rows and the scan electrodes belonging to the even-numbered rows are drawn out to the other side, and the sustain electrodes belonging to the odd-numbered rows and the sustain electrodes belonging to the even-numbered rows are electrically connected to each other and then connected to the drive circuit. Shall be. Thus, crosstalk in both the sustain period and the write period can be prevented, the reliability of the connection between the panel and the circuit can be ensured, and the wiring resistance and impedance of the electrodes can be reduced.

[0024]

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

(Embodiment 1) The configuration of an AC type plasma display panel (hereinafter referred to as a panel) according to a first embodiment of the present invention is substantially the same as the configuration of the conventional panel shown in FIG. The following description will be made for a 42-inch VGA-equivalent (pixel pitch of about 1 mm × 1 mm).

In the panel 1 according to the embodiment of the present invention, similarly to the conventional panel shown in FIG. 2, a glass front substrate 2 and a glass rear substrate 3 are arranged to face each other. On the front substrate 2, a plurality of electrode sets each including a scan electrode 4 and a sustain electrode 5 which are covered with the dielectric layer 6 and extend in the row direction are arranged. Scan electrodes 4 and sustain electrodes 5 are alternately arranged. That is, they are in a sequential arrangement as shown in FIG. The scanning electrode 4 and the sustain electrode 5 are composed of bus electrodes 4a and 5a made of metal electrodes and transparent electrodes 4b and 5b.
The bus electrodes 4a and 5a have a role of lowering the resistance of the entire electrode, and the transparent electrodes 4b and 5b define a region where the discharge spreads.

As the protective layer 7 on the dielectric layer 6, a material having high sputter resistance and a high secondary electron emission coefficient, such as magnesium oxide (MgO), is used.

On the rear substrate 3, write electrodes 11 extending in the column direction are arranged, and the write electrodes 11 are covered with the second dielectric layer 10. Each writing electrode 11
Strip-shaped barrier ribs 8 for isolating electrodes and forming discharge spaces
Are provided between the write electrodes 11.

The second dielectric layer 1 is provided between adjacent partitions 8.
A phosphor layer 9 is formed so as to cover the side surfaces of the partition wall 8 above the partition wall 8.

The discharge space is filled with, for example, a mixed gas of xenon (Xe) and neon (He) as a discharge gas.

This panel 1 has a front substrate 2 on the display surface side.
The image display is viewed from the side. The fluorescent layer 9 is excited by ultraviolet rays generated by the discharge in the discharge space, and the generated visible light is used for display light emission.

As the phosphor layer 9, a phosphor material of the same color is used in the direction parallel to the writing electrode 11, and the writing electrode 1 is used.
In the direction orthogonal to 1, phosphor materials of three primary colors are sequentially used in the order of red, green, and blue, for example. One discharge cell is 1
One set of scanning electrode 4 and sustain electrode 5 and one writing (third)
One pixel is constituted by three discharge cells which are formed at the intersections with the electrodes 11 and are adjacent to each other in a direction orthogonal to the partition walls 8.

In the present invention, the waveforms to be applied are different between odd-numbered rows and even-numbered rows. The odd-numbered rows of electrodes are
(2n-1), sustain electrodes 5- (2n-1), and the electrodes in the even rows are referred to as scan electrodes 4- (2n) and sustain electrodes 5- (2n). However, the waveforms to be applied may be reversed between odd-numbered rows and even-numbered rows.

FIG. 1 shows a voltage waveform applied to each electrode of the present embodiment.

The difference from the conventional driving method (FIG. 12) lies in the sustain period. In the sustain period, the scan electrode 4- (2n-
The voltage waveform applied to 1) and the voltage applied to the scanning electrode 4- (2n) are shifted from each other by a half period in the period of the sustain pulse. Similarly, the sustain electrode 5- (2n-1) and the sustain electrode 5-
(2n) is also shifted by a half period of the sustain pulse. Thus, during the sustain period, the phase of the sustain pulse is reversed between the scan electrodes 4 in adjacent rows and between the sustain electrodes 5. Since scan electrode 4 and sustain electrode 5 in the same row have opposite phases due to the principle of the sustain pulse, scan electrode 4- (2n-
1) and the sustain electrode 5- (2n), and the scan electrode 4- (2n) and the sustain electrode 5- (2n-1) have the same phase.

An object of the present invention is to prevent both crosstalk in a writing period and crosstalk in a sustain period, as described above. Using FIGS. 5 and 6,
The relationship between the mechanism in which each crosstalk occurs and the electrode arrangement will be described.

FIG. 5 is a cross-sectional view taken along line XX ′ of FIG. As shown in FIG. 5, in the case of the sequential arrangement, a certain scan electrode 4-2 includes a sustain electrode 5-1 and a sustain electrode 5-2.
It is sandwiched between. Since scan electrode 4-2 is paired with sustain electrode 5-2, the sustain discharge is normally generated between scan electrode 4-2 and sustain electrode 5-2.
However, since the sustain electrode 5-1 and the sustain electrode 5-2 have the same potential, the difference between the sustain electrode 5-1 and the sustain electrode 5-2 is only the distance when viewed from the scan electrode 4-2. In the case of a 42-inch VGA type plasma display, the distance between the sustain electrode 5-1 and the scan electrode 4-2 is designed to be about three times the distance between the sustain electrode 5-2 and the scan electrode 4-2. Yes, but if you try to design a higher definition cell,
Since the pixel pitch is small, the scanning electrode 4-2 is inevitably required.
The distance between the electrode and the sustain electrode 5-1 is reduced. On the other hand, in the case of the inverted arrangement (FIG. 4B), one of the electrodes adjacent to the scan electrode 4-2 is the sustain electrode 5-2 and the other is the scan electrode 4-1. No discharge occurs between the scan electrode 4-1 and the scan electrode 4-2 having the same potential. In other words, it can be said that the inverted arrangement has a design margin with respect to the crosstalk during the sustain period than the sequential arrangement.

FIG. 6 shows a mechanism in which crosstalk occurs during the writing period. FIG. 6 shows Y- in FIG.
Represents the Y 'section. Therefore, in this figure, the scanning electrodes 4 and the sustaining electrodes 5 have an inverted arrangement. FIG.
(C) is a conceptual diagram of the write discharge.

As shown in FIG. 6A, in the discharge cell, positive wall charges are accumulated in the dielectric layer 6 and the protective layer 7 on the scan electrode 4 by the writing period, The potential between the sustain electrode 5 and between the scan electrode 4 and the write electrode 11 is set to be close to the discharge start voltage due to the potential difference applied from the outside and the distribution of wall charges on the protective layer 7. Now, assuming that writing is to be performed on cells in row 1, by applying a bias voltage Vscn to the scan electrodes 4-2 in row 2 where writing is not to be performed, writing discharge does not occur in this row. To do. The scanning electrode 4 is called a scanning electrode because it sequentially scans the row where writing is to be performed.

Next, when writing is performed, a pulse of a voltage Vda is applied to the writing electrode 11 as shown in FIG. As a result, a discharge occurs between the scanning electrode 4-1 and the writing electrode 11.

The charged particles generated by this discharge become priming, and as shown in FIG.
And the sustain electrode 5-1 also causes dielectric breakdown and discharge occurs. In a normal state, this causes the sustain electrode 5-
1, negative wall charges on the dielectric layer 6 and the protective layer 7,
-1, positive wall charges are formed on the dielectric layer 6 and the protective layer 7, and a discharge can be caused in the subsequent sustain period, and a cell to be maintained can be selected.

However, in the case of the inverted arrangement, the discharge between the scan electrode 4-1 and the sustain electrode 5-1 is triggered by the discharge that has occurred between the scan electrode 4-1 and the write electrode 11 in FIG. Starts, the sustain electrodes 5-5 as shown in FIG.
In some cases, the flow of the charged particles may reach the sustain electrode 5-2 having the same potential as that of the first electrode. This flow of charged particles is
Since they are electrons, they move much faster than ions, and change the state of wall charges near the sustain electrode 5-2. As a result, when writing is attempted in the next row 2, the potential difference is insufficient, and writing discharge does not occur.

This is the crosstalk in the writing period. In the case of the sequential arrangement, the scan electrode 4-2 is provided next to the sustain electrode 5-1 instead of the sustain electrode 5-2.
2 will never be reached.

In the case of the sequential arrangement, there is a sustain electrode 5 in an adjacent row on the opposite side to the sustain electrode 5-1 when viewed from the scan electrode 4-1, and crosstalk may occur there.
The probability is lower than the crosstalk in the case of the inverted arrangement. In the sequential arrangement, normal operation can be performed as long as the discharge proceeds in the normal direction. On the other hand, in the case of the inverted arrangement, even if the normal operation is performed as shown in FIG. This is because a write failure can occur due to the flow of charges caused by the change in wall charges of adjacent cells.

To summarize the relationship between the two types of crosstalk and the electrode arrangement as described above, an inverted arrangement is provided for the crosstalk during the sustain period, and a sequential arrangement is provided for the crosstalk during the write period. It is desirable from a viewpoint.

The inversion arrangement also has the advantage that the reactive power can be reduced. The reactive power is power consumed regardless of whether the display screen, that is, the screen is turned on or off, and is mostly consumed by the sustain pulse. This is because both the voltage and the frequency are high. When the sustain pulse is applied, the electric charge moves between the scan electrode 4 and the sustain electrode 5 according to the capacitance. However, the inverted arrangement has a smaller capacitance than the sequential arrangement. This is because there is no need to charge the inter-electrode space between the rows because the electrodes of the same potential are adjacent to each other between adjacent rows.

In consideration of this, the driving method of the present invention provides a driving waveform such that the driving waveform is sequentially arranged during the writing period and is inverted during the sustaining period.

Referring to the driving waveform of the present invention shown in FIG. 1, the arrangement of the writing period is a sequential arrangement. In the sustain period, the electrodes adjacent to each other across the row (for example, the sustain electrodes 5- (2n) -1) and the scanning electrode 4- (2n)) have the same potential. That is, they are in an inverted arrangement.

In order to convert from the sequential arrangement to the inverted arrangement by the driving waveform, some contrivance is required during the transition period.

The electrode of the row (2n-1) and the scanning electrode 4- (2
n-1) and the sustain electrode 5- (2n-1) are applied with the same waveform as the conventional drive waveform (FIG. 12). The electrode of the row (2n), the scanning electrode 4- (2n) and the sustain electrode 5- (2n)
The phase of the sustain pulse must be inverted. Therefore, while the cells in row (2n-1) perform the sustain discharge once, that is, the half period of the sustain pulse, the scan electrode 4- (2n) and the sustain electrode 5- (2n) are not affected by the discharge. It must be set to such a potential.

As shown in FIG. 1, in the present invention, the scanning electrode 4- (2n) is connected to the ground potential and the sustain electrode 5- (2n).
Was set to the same potential Ve as in the writing period. Ve is a voltage substantially equal to the voltage Vsus of the sustain pulse. As a result, in the row (2n), there is no change in the potential, so that the discharge does not start. Further, the adjacent sustain electrode 5-
Since (2n-1) and the scanning electrode 4- (2n) have substantially the same potential, the electrodes in the row (2n) do not affect the discharge in the row (2n-1). The same waveform as that of the sustain electrode 5- (2n) is applied to the sustain electrode 5- (2n-2) of the row (2n-1) and the row (2n-2) adjacent to the opposite side of the row (2n). However, also in this case, the scanning electrode 4- (2n-
Since 1) and the sustain electrode 5- (2n-2) are set to almost the same potential, there is no effect on the discharge in the row (2n-1).

Although the case where the base potential in the writing period is the ground potential is shown here, the present invention does not depend on the details of the writing voltage waveform. For example, a waveform in which the base potential in the writing period is set to the negative potential −Vad as shown in FIG. 7 can be considered. In this case, the transition period to the sustaining period, that is, the row (2n−1) changes the sustaining discharge by one. While performing
The scan electrode 4- (2n) may be set to the ground potential and the base potential -Vad in the writing period, and the sustain electrode 5- (2n) may be set to the potential Ve in the writing period.

The driving method of the present embodiment can be applied to a panel having a conventional structure as shown in FIG.

The voltage waveform of sustain electrode 5 differs for each row, but as shown in FIG.
Since the same voltage waveform is applied to all (2n) and the same voltage waveform is applied to the sustain electrodes 5- (2n-1) belonging to the odd-numbered rows, the same voltage waveform is applied as shown in FIG. The electrodes can be electrically connected to each other outside the display area and can be shared. This makes it possible to reduce the resistance value and the inductance of the connection portion from the electrode lead portion to the drive circuit. The resistance and inductance of the electrodes cause a voltage drop and waveform dulling, which leads to an increase in power consumption and a decrease in drive margin.

9 and 10 show specific examples in which every other sustain electrode 5 is shared. FIG. 9 shows an example in which the electrodes are three-dimensionally crossed outside the display area.
It is formed by sandwiching 2 therebetween.

FIG. 10 shows a structure in which electrodes are shared in a portion connecting the panel and the drive circuit. As shown in FIG. 10, the connection part connecting the panel and the drive circuit is divided into a connection part 13-1 of the storage electrode in the odd-numbered row and a connection part 13-2 of the storage electrode in the even-numbered row. As a connecting means between the panel and the drive circuit, a flexible substrate or the like is often used. In the example shown in FIG. 10, the flexible substrate 14 for odd rows is used.
-1 and the flexible substrate 14-2 for the even-numbered row are connected to the connection portions 13-1 and 13-2, respectively. Flexible substrates 14-1 and 14-2 have only odd rows inside,
Only the even-numbered rows are shared. According to this method, it is not necessary to form a complicated shape like the insulating layer 12 as compared with the case of FIG.

The effect of the present embodiment does not depend on the method of sharing the sustain electrodes.

(Embodiment 2) A second embodiment of the present invention will be described.

The driving method of this embodiment is the same as that of the first embodiment. FIG. 1 shows the features of the panel of the present embodiment.
1 will be described.

FIG. 11 shows how to pull out the scanning electrode 4 and the sustaining electrode 5 and how to connect them to the circuit. FIG.
FIG. 11A shows the first embodiment, and FIG. 11B shows this embodiment. As shown in FIG. 11A, in the first embodiment, the sustain electrodes 5 are drawn on one side of the panel and the scan electrodes 4 are drawn on the other side, and are connected to a drive circuit. The sustain electrodes 5 were divided into odd-numbered rows and even-numbered rows, and each row was shared and connected to a drive circuit. In the present embodiment, as shown in FIG.
1, 4-3,..., 4- (2n-1), 4- (N-1)
And even-numbered sustain electrodes 5-2, 5-4,..., 5- (2n)
..5-N is placed on one side (right side in the figure) of the panel, and scan electrodes 4-2, 4-4,..., 4- (2n).
And odd-numbered sustain electrodes 5-1, 5-3,..., 5- (2n-
1)... 5- (N-1) is pulled out to another side (the left side in the figure) and connected to the drive circuit. Here, N represents the number of rows in the entire panel.

Scan electrode 4- (2n-1) belonging to odd-numbered row
As shown in FIG. 1, the scan electrodes 4- (2n) belonging to the even-numbered rows have substantially the same voltage waveform during the initialization period and the write period except for the timing of the scan pulse. Is inverted. Therefore, as in the first embodiment, the scan electrodes 4- (2n
-1) and the scanning electrodes 4- (2n) belonging to the even-numbered rows are drawn out to the connection with the drive circuit while being adjacent to each other, and a large voltage difference of 2 × Vsus, that is, about 350 V, is generated between the adjacent electrodes by the sustain pulse. Voltage, which causes dielectric breakdown in an electrode lead-out part, a connection part, a flexible substrate used for connection with a drive circuit, and the like. The same applies to the sustain electrode 5.

Therefore, as in the present embodiment, the scanning electrodes 4- (2n-1) belonging to the odd-numbered rows and the sustain electrodes 5- (2n) belonging to the even-numbered rows are led out to the same side of the panel, so that the sustaining period can be reduced. Since electrodes having the same potential are adjacent to each other, dielectric breakdown hardly occurs. Scan electrodes 4- (2n) belonging to even-numbered rows and sustain electrodes 5- (2n-) belonging to odd-numbered rows.
The same can be said for 1).

The common use of the sustain electrodes 5 can be made in the present embodiment in the same manner as in the first embodiment. For example, the scanning electrode 4- (2n-1) belonging to the odd-numbered row
In the lead-out portion (right side in FIG. 11B) from which the storage electrodes 5- (2n) belonging to the even-numbered rows are drawn, it is possible to electrically connect the storage electrodes 5- (2n) belonging to the even-numbered rows. It is possible to reduce the resistance value and the inductance by sharing them. In this case, a portion which crosses the scan electrodes 4- (2n-1) belonging to the odd-numbered rows may be provided as shown in FIG. 8, or a portion connected to the drive circuit may be scanned as shown in FIG. The electrode 4- (2n-1) and the sustain electrode 5- (2n) are separated from each other, and the flexible substrates 14-1 and 14-2 are connected to the electrodes 4- (2n-1) to share the sustain electrode 5- (2n). You may. Scan electrode 4-
(2n-1) cannot be shared because the timing of the scanning pulse is different. Scan electrodes 4 belonging to even rows
(2n) and sustain electrodes 5- (2n-1) belonging to odd-numbered rows
The same applies to the drawn-out portion (left side in FIG. 11B) from which.

The cell structure of the plasma display panel to which the present invention can be applied is not limited to the structure shown in FIG. That is, any three-electrode surface discharge type plasma display panel driven by using the scan electrode 4, the sustain electrode 5, and the write electrode 11 may be used. For example, a structure in which the partition walls 8 are formed in a grid pattern, a structure in which the scanning electrode 4 and the sustain electrode 5 are divided into a plurality of portions, and a structure in which the transparent electrodes 4a and 5a are not used may be used. In particular, when the present invention is combined with a grid-shaped partition in which partition walls 8 are not striped but have a partition structure for separating adjacent discharge cells in a column direction, the effect of preventing crosstalk is further enhanced.

Further, the drive waveforms in the initialization period, the erase period, and the like need not be those shown in FIG. That is,
The present invention is applicable to any drive waveform having a write period and a sustain period.

The driving waveforms in the writing period and the sustaining period are also the same as those shown in FIGS. 6A to 6C during the writing period, and are maintained between the scanning electrode 4 and the sustaining electrode 5 during the sustaining period. As long as the waveform causes discharge, it does not depend on the slope, voltage value, pulse width, etc. of the drive waveform. From the viewpoint of the discharge operation, the present invention provides that the write discharge is performed in the same direction in the odd-numbered rows and the even-numbered rows, that is, the scan electrodes 4 to the sustain electrodes 5
, And the sustain discharge is in the opposite direction, that is, when the sustain discharge in a certain row spreads from the scan electrode 4 to the sustain electrode 5, the sustain discharge in the adjacent row starts from the sustain electrode 5 toward the scan electrode 4. It can be described as spreading.

Further, using the plasma display panels of the first and second embodiments, the driving method of the plasma display panel, a sustain drive circuit for applying a voltage to scan electrode 4 and sustain electrode 5, and a write (third) electrode If an image display device is configured by connecting an address drive circuit for applying a voltage to 11 and a control unit that controls them, an image display device in which abnormal discharge such as crosstalk is suppressed is provided. be able to.

[0068]

As described above, according to the present invention, the scan electrodes and the sustain electrodes are sequentially arranged, and the same voltage waveform is applied to the scan electrodes belonging to the odd rows and the sustain electrodes belonging to the even rows in the sustain period.
By applying the same voltage waveform to the scan electrodes belonging to the even-numbered rows and the sustain electrodes belonging to the odd-numbered rows, it is possible to prevent both crosstalk during the writing period and crosstalk during the sustain period.

[Brief description of the drawings]

FIG. 1 is a diagram showing a driving method of the present invention.

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

FIG. 3 is a diagram illustrating a sequential arrangement and an inverted arrangement.

4A is a diagram illustrating crosstalk in a sustain period; FIG. 4B is a diagram illustrating crosstalk in a writing period;

FIG. 5 is a diagram illustrating a principle of crosstalk in a sustain period.

FIGS. 6A, 6B, and 6C are diagrams showing the principle of write discharge, and FIGS. 6D are diagrams showing crosstalk during writing.

FIG. 7 is a diagram showing a modification of the first embodiment of the present invention.

FIG. 8 is a diagram showing the common use of electrodes.

FIG. 9 is a diagram illustrating a first method of sharing electrodes.

FIG. 10 is a diagram showing a second method of sharing electrodes.

FIG. 11 is a diagram showing an electrode lead-out according to the first embodiment and the second embodiment of the present invention.

FIG. 12 is a diagram showing a conventional panel driving method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel 2 Front substrate 3 Back substrate 4 Scan electrode 5 Sustain electrode 6 Dielectric layer 7 Protective layer 8 Partition wall 9 Phosphor layer 10 Dielectric layer (2nd dielectric layer) 11 Writing electrode 12 Insulating layer 13 Connection part 14 Flexible substrate 15 Common part of sustain electrode 4a, 5a Metal bus 4b, 5b Transparent electrode

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobuaki Nagao 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. 72) Inventor Hiroyuki Tachibana 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. (reference)

Claims (19)

[Claims] A first substrate on which scan electrodes to which a scan pulse is applied and sustain electrodes to which the scan pulse is not applied are alternately formed in parallel; and a write electrode includes a first electrode and a second electrode.
A second substrate formed in a direction orthogonal to the electrodes is disposed to face, and one discharge cell is provided at an intersection of one scanning electrode, one sustain electrode, and one writing electrode. A driving method including driving a formed plasma display panel and including a writing period and a sustain period, wherein the potentials in the sustain period are different between the scan electrodes belonging to cells adjacent in a direction perpendicular to the scan electrodes. A method for driving a plasma display panel, comprising: 2. A drive voltage waveform applied in a sustain period to a scan electrode belonging to an arbitrary cell and a sustain electrode belonging to a cell adjacent to the cell in a direction perpendicular to the scan electrode. The method of driving a plasma display panel according to claim 1, wherein: 3. A first substrate on which scan electrodes to which scan pulses are applied and sustain electrodes to which no scan pulses are applied are alternately formed in parallel, and a write electrode comprises a first electrode and a second electrode.
A second substrate formed in a direction orthogonal to the electrodes is disposed to face, and one discharge cell is provided at an intersection of one scanning electrode, one sustain electrode, and one writing electrode. A driving method for driving the formed plasma display panel, including a writing period and a sustain period, wherein cells belonging to odd-numbered rows and cells belonging to even-numbered rows have the same direction of writing discharge in the writing period. ,
A method of driving a plasma display panel, wherein a direction in which a sustain discharge spreads in the sustain period is opposite. 4. A first substrate in which scan electrodes to which a scan pulse is applied and sustain electrodes to which the scan pulse is not applied are alternately formed in parallel, and a write electrode is composed of a first electrode and a second electrode.
A second substrate formed in a direction orthogonal to the electrodes is disposed to face, and one discharge cell is provided at an intersection of one scanning electrode, one sustain electrode, and one writing electrode. A driving method for driving a formed plasma display panel and including a writing period and a sustain period, wherein one of a cell belonging to an odd-numbered row and a cell belonging to an even-numbered row is a first set, and the other is a second set. Then, the scan electrodes of the cells belonging to the first set and the sustain electrodes are connected to the scan electrodes of the cells belonging to the second set after the end of the writing period. While maintaining the potential immediately after the end of the writing period, the second electrode is synchronized with the end of the sustain pulse of the first scanning electrode belonging to the first set.
And changing the potential of the sustain electrode belonging to the set
The transition from the writing period to the sustain period is performed by applying a sustain pulse to the first scan electrodes belonging to the second set in synchronization with the sustain pulses applied to the first sustain electrodes belonging to the set. Characteristic driving method of a plasma display panel. 5. A first substrate in which scan electrodes to which a scan pulse is applied and sustain electrodes to which the scan pulse is not applied are alternately formed in parallel, and a write electrode comprises a first electrode and a second electrode.
A second substrate formed in a direction orthogonal to the electrodes is disposed to face, and one discharge cell is provided at an intersection of one scanning electrode, one sustain electrode, and one writing electrode. Driving the formed plasma display panel, a writing period, a driving method including a sustain period, wherein the cells belonging to the odd rows and the cells belonging to the even rows, the timing of the sustain discharge in the sustain period, A method for driving a plasma display panel, wherein the plasma display panel is shifted by one sustain discharge. 6. A plasma display panel driven by the driving method according to claim 1, wherein:
A plasma display panel wherein a scanning electrode is drawn out to one side of the panel and a sustain electrode is drawn out to another side, and connected to a driving circuit. 7. A sustain electrode group connected to an odd-numbered row and a sustain electrode belonging to an even-numbered row of the sustain electrode group drawn out to one side of the panel. The plasma display panel according to item 1. 8. A portion where a sustain electrode belonging to an odd-numbered row and a sustain electrode belonging to an even-numbered row intersect with each other, and a portion for electrically connecting the sustain electrodes belonging to the odd-numbered row and the sustain electrodes belonging to the even-numbered row. The plasma display panel according to claim 7, wherein the plasma display panel is connected to: 9. An insulating layer is formed on a substrate on which an electrode lead portion is formed, and another electrode is formed on the insulating layer so that two or more electrodes are electrically isolated. The plasma display panel according to claim 8, further comprising an intersecting portion. 10. A plasma display panel in which an electrode group is drawn out on at least one side of the panel, wherein the electrode group is divided into at least two groups, and a connecting portion for connecting a driving circuit and the electrode group is provided. A plasma display panel characterized by being formed spatially separated for each group. 11. A connection method for connecting the plasma display panel according to claim 10 and a driving circuit for driving the plasma display panel, wherein at least one of the electrode groups divided into at least two groups. A method of connecting a plasma display panel and a driving circuit of the plasma display panel, wherein the electrodes are electrically connected inside the connection means to make the potential common. 12. In a sustain electrode group drawn out to one side of the panel, sustain electrodes belonging to odd rows are defined as a first group, and sustain electrodes belonging to even rows are defined as a second group.
The plasma display panel according to claim 6, wherein the sustain electrodes are electrically connected to each other in each group using the method for connecting a plasma display panel to a driving circuit of the plasma display panel according to claim 11. Display panel. 13. A plasma display panel driven by the driving method according to claim 1, wherein a scan electrode belonging to an odd-numbered row and a sustain electrode belonging to an even-numbered row are disposed on one side of the panel, and the odd-numbered row is provided. Pulling out the sustain electrode belonging to the above and the scanning electrode belonging to the even-numbered row to another side,
A plasma display panel connected to a driving circuit. 14. The plasma display panel according to claim 13, further comprising means for electrically connecting sustain electrodes belonging to odd-numbered rows and sustain electrodes belonging to even-numbered rows. 15. A method according to claim 1, further comprising: providing a portion where the sustain electrodes belonging to the odd rows intersect with the scan electrodes belonging to the even rows, and connecting the sustain electrodes belonging to the odd rows to a portion electrically connecting the sustain electrodes. Item 15. A plasma display panel according to item 14. 16. A method according to claim 1, further comprising: providing a portion where the sustain electrode belonging to the even-numbered row intersects with the scan electrode belonging to the odd-numbered row, and connecting the sustain electrode belonging to the even-numbered row to a portion electrically connecting the sustain electrode. Item 15. A plasma display panel according to item 14. 17. An insulating layer is formed on a substrate on which an electrode lead portion is formed, and another electrode is formed on the insulating layer so that two or more electrodes are electrically isolated. 17. The plasma display panel according to claim 16, further comprising an intersecting portion. 18. The plasma display panel and plasma display according to claim 11, wherein sustain electrode groups belonging to odd rows drawn to one side of the panel are defined as a first group, and scan electrodes belonging to even rows are defined as a second group. 15. The plasma display panel according to claim 14, wherein the sustain electrodes belonging to odd rows are electrically connected to each other by using a connection method with a panel driving circuit. 19. The method according to claim 6, wherein the control unit comprises:
20. A plasma display panel according to any one of claims 1 to 18, a sustain drive circuit connected to the scan electrode and the sustain electrode for applying a voltage to the panel, and an address drive circuit connected to the write electrode for applying the voltage. An image display apparatus comprising: a control unit configured to control the sustain driving circuit and the address driving circuit; and driving the plasma display panel using the driving method of the plasma display panel according to claim 1.