JP2000223034A - Plasma display panel - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To increase the resolution by suppressing the spread of discharge in the column direction. A plurality of main electrodes (X, Y) defining rows of a screen are provided.
Are arranged so that surface discharge can be generated by using adjacent main electrodes as an electrode pair, and in a PDP in which a discharge space in a screen is partitioned for each column by a plurality of partition walls 29 separated from each other in a row direction. At least one of the pair of partition walls corresponding to each column of the screen has a base 29A in a plan view band extending over the entire length of the screen, and a plurality of bases 29A projecting in the row direction from the base 29A at the arrangement position of the main electrode in the column direction. There is provided a structure in which the column space 31, which is a discharge space for one column, is periodically narrowed by the protrusion 29B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a surface discharge type PD.
The present invention relates to a P (plasma display panel) and a display device using a PDP.

[0002] With the practical use of color screens, PDPs have come to be widely used in applications such as television images and computer monitors. To further spread such a PDP, a structure suitable for high definition has been developed.

[0003]

2. Description of the Related Art As a color display device, an AC type PDP of a three-electrode surface discharge type has been commercialized. The surface discharge type referred to here is a type in which a lighting state is maintained using wall charges.
First and second alternating anode or cathode in C drive
Are arranged in parallel with one inner surface of the substrate pair. According to this type, the phosphor layer for color display can be provided on the second substrate opposed to the first substrate on which the main electrode pair is arranged, and can be kept away from the electrodes, whereby ion bombardment during discharge can be achieved. The deterioration of the phosphor layer due to the above can be reduced, and the life can be extended.

In a surface discharge type PDP, a main electrode extends in the same direction as a row electrode defining a row of a screen, and thus a third electrode (column electrode) for selecting an individual cell in each row,
In addition, a partition (barrier rib) that partitions the discharge space for each column is required. With respect to the arrangement of the partition walls, a form in which a partition wall having a height corresponding to the gap size of the discharge space is provided on one substrate is mainly used. This is because manufacturing is much easier than providing both substrates. As the partition pattern, a stripe pattern in which strips in a band shape in plan view are arranged is more advantageous than a mesh pattern that divides individual cells. In the case of a stripe pattern, the discharge space in each column is continuous over the entire length of the screen, so that the probability of discharge due to priming can be increased, the phosphor layers can be equalized, and the exhaust processing can be facilitated.

The basic form of the three-electrode structure is to arrange a pair of main electrodes for each row of the screen. The arrangement interval (surface discharge gap) of the main electrode pairs in each row is 150 to 200.
The thickness is selected from several tens to one hundred and several tens μm so that a discharge is generated by applying a voltage of about volt. On the other hand, an electrode gap (referred to as a reverse slit) between adjacent rows prevents unnecessary surface discharge between rows and reduces capacitance,
The value is set to a value sufficiently larger than the surface discharge gap (about several times). That is, the arrangement interval of the main electrodes differs between rows. In such a basic form, since the reverse slit does not contribute to light emission, the screen utilization rate is small and disadvantageous in terms of luminance, and it is difficult to achieve high definition by reducing the row pitch. If the reverse slit is narrowed in order to increase the luminance, the voltage margin under driving conditions that can prevent unnecessary surface discharge is reduced.

Therefore, conventionally, the number of lines N on the screen is set to 1
Are arranged at substantially equal intervals, and
An electrode configuration (shown in Japanese Patent Application Laid-Open No. 2-220330) in which adjacent electrodes are used as an electrode pair to generate a surface discharge is employed, and one frame is divided into an odd field and an even field and displayed in a time-division manner. It has been proposed (JP-A-9-160525). In this electrode configuration, the main electrodes except for both ends of the arrangement form an electrode pair with other main electrodes adjacent to one side and the other side in the arrangement direction. That is, it is also used for displaying odd and even rows. The main electrodes at both ends of the arrangement form an electrode pair with another main electrode adjacent to one side in the arrangement direction. Only odd lines are used to display odd fields, and only even lines are used to display even fields. For example, when the lighting of an odd field is maintained, an in-phase voltage is applied to a main electrode that defines a row not used for display (here, an even row). Thereby, the interference of the discharge between the odd rows and the even rows is reduced.

[0007]

As described above, unnecessary surface discharge in a row not used for display can be prevented by setting the phase of the drive voltage. However, in the prior art, since the partition walls are linear, they are used for display. There is a problem that the surface discharge in a row spreads to an adjacent row (a row not used for display), thereby deteriorating the resolution in the column direction.

An object of the present invention is to increase the resolution by suppressing the spread of discharge in the column direction. Another object is to increase the brightness without lowering the contrast.

[0009]

According to the present invention, the partition wall for partitioning the discharge space for each column is formed in a band shape having projections projecting in the row direction, and the column space is defined as a boundary between the rows. Narrow each time locally. By providing the constriction in the column space, the spread of the surface discharge in the column direction is suppressed. However, since the column space is continuous over a plurality of rows, a priming effect is obtained in each cell due to inflow of charged particles from other cells, and it is easy to provide a phosphor layer evenly in each cell. It is.

When the partition wall partially extends in the row direction, the area of the side wall of the partition wall increases. Therefore, when the phosphor layer is provided on the side surface of the partition, the light emitting area increases and the luminance increases.

In the PDP according to the first aspect of the present invention, a plurality of main electrodes defining rows of a screen are arranged so that surface discharge can be generated using adjacent main electrodes as an electrode pair, and are separated from each other. A PDP in which a discharge space in a screen is partitioned for each column by a plurality of partition walls arranged in a row direction,
At least one of the pair of partition walls corresponding to each column of the screen has a base in a plan view band shape extending over the entire length of the screen, and a plurality of protrusions projecting in the row direction from the base at the arrangement position of the main electrode in the column direction. And a column space, which is a discharge space for one column, is periodically narrowed by the protrusions.

In the PDP according to the second aspect of the present invention, the plurality of main electrodes are arranged in parallel at substantially equal intervals.

In the PDP according to a third aspect of the present invention, the height of the projection is lower than that of the base.

A PDP according to a fourth aspect of the present invention has a phosphor layer that covers the side surface of the base and the side surface of the protrusion.

According to a fifth aspect of the present invention, the main electrode comprises a transparent conductive film and a metal film, and is disposed on the front side with respect to the discharge space.

In the PDP according to a sixth aspect of the present invention, the metal film is disposed so as to overlap the projection.

According to a seventh aspect of the present invention, one frame corresponds to two frames.
And a drive circuit for applying a drive voltage to the electrode pair so that one field is displayed by odd rows and the other field is displayed by even rows.

In the PDP according to the present invention, a plurality of main electrodes defining rows of a screen are arranged so that surface discharge can be generated by using adjacent main electrodes as an electrode pair, and are separated from each other. A plasma display panel in which a discharge space in a screen is partitioned for each column by a plurality of band-shaped partition walls arranged in a row direction, and at a position where the main electrode is arranged between the partition walls, the height is lower than the partition walls. A plurality of projections are provided so as to connect the partition walls, and the column space, which is a discharge space for one row, is periodically narrowed by the projections.

A PDP according to a ninth aspect of the present invention has a phosphor layer that covers the side surface of the partition and the side surface of the protrusion.

According to a tenth aspect of the present invention, the main electrode comprises a transparent conductive film and a metal film, and is disposed on the front side with respect to the discharge space.

According to an eleventh aspect of the present invention, a driving voltage is applied to the electrode pair such that one frame is divided into two fields, one field is displayed by odd rows, and the other field is displayed by even rows. And a driving circuit for performing the driving.

[0022]

FIG. 1 is a schematic view of an electrode matrix according to the present invention.

In the surface discharge type PDP according to the present invention, the total M
The address electrodes A are arranged as column electrodes, and a total of (N + 1) main electrodes X and Y are alternately arranged at equal intervals as row electrodes so as to be orthogonal to the address electrodes A. M is the number of columns of the screen ES, and N is the number of rows. The arrangement interval of the main electrodes X and Y is a practical range of the driving voltage (for example, 100 to 20).
0 V) is selected to have a size of several tens to one hundred and several tens of micrometers that can generate a surface discharge at 0 V). Although the main electrodes X and Y are drawn thin in the figure, the width of each main electrode X and Y is actually larger than the arrangement interval.

The main electrodes X, which are the odd-numbered electrodes in the arrangement order in the illustrated example, are always electrically shared for each group described later. The main electrodes Y, which are the even-numbered electrodes, are individually controlled during line-sequential addressing, and are electrically shared for each group in the same manner as the main electrodes X during lighting maintenance. Of the main electrodes X and Y, the main electrode X and the main electrode Y adjacent to each other form an electrode pair 12 for generating a surface discharge, and one row L (the suffix in the figure indicates a row number). ). That is, each of the main electrodes X and Y except for both ends of the array has two rows L (odd rows and even rows).
Responsible for the display. The main electrodes X at both ends are responsible for displaying one row L. The row L is a set of cells (display elements) C having the same arrangement order in the column direction.

FIG. 2 is a perspective view showing the internal structure of the PDP according to the present invention, and FIG. 3 is a schematic view of the three-dimensional structure of the partition.

The illustrated PDP 1 is an AC type color PDP having a surface discharge structure, and includes a pair of substrate structures 10 and 20.
In each cell constituting the screen ES, a pair of main electrodes X,
Y intersects with the address electrode A. The main electrodes X and Y are arranged on the inner surface of the glass substrate 11 which is the base material of the substrate structure 10 on the front side, and each is composed of a transparent conductive film 41 and a metal film (bus electrode) 42 for ensuring conductivity. Consists of
The metal film 42 has, for example, a three-layer structure of chromium-copper-chromium, and is laminated at the center of the transparent conductive film 41 in the column direction. 30 to 50 μm thick to cover main electrodes X and Y
Approximately a dielectric layer 17 is provided, and magnesia (MgO) is applied as a protective film 18 on the surface of the dielectric layer 17.

The address electrodes A are connected to the substrate structure 20 on the rear side.
Are arranged on the inner surface of a glass substrate 21 which is a base material of
It is covered by a dielectric layer 24. On the dielectric layer 24, a height of 100 to 200 μm (for example, 150 μm)
Partition walls 29 are provided one by one in the arrangement gap of the address electrodes A. The partitions 29 divide the discharge space 30 into columns in the row direction (horizontal direction of the screen), and define the gap size of the discharge space 30. Then, phosphor layers 28R, 28G, and 28B of three colors of R, G, and B for color display are provided so as to cover the inner surface on the back side including the upper side of the address electrode A and the side surface of the partition wall 29. ing. The discharge space 30 is filled with a discharge gas in which xenon is mixed with neon as a main component, and the phosphor layers 28R, 28
G and 28B are locally excited by ultraviolet rays emitted by xenon during discharge to emit light. One pixel (pixel) of display
Is composed of three sub-pixels arranged in the row direction. The structure in each sub-pixel is a cell (display element) C. Since the arrangement pattern of the partition walls 29 is a stripe pattern, a portion (column space) corresponding to each column in the discharge space 30 is continuous over all rows. This allows
Homogeneous phosphor layers 28R, 28G, 2 with sufficiently few bubbles
8B can be formed by a screen printing method excellent in mass productivity.

As shown in FIG. 3, the partition wall 29 is composed of a band-like base 29A extending in the column direction and a plurality of protrusions 29B projecting in the row direction from the base 29A at the position of the main electrode in the column direction. . The protrusions 29B of the partition walls 29 adjacent to each other project so as to face each other, and a structure is formed in which the column space, which is a discharge space for one column, is periodically narrowed by the presence of the protrusions 29B. The protrusion 29B suppresses the spread of the discharge in the column direction. Also, the protrusion 29B
Is provided, the side area of the partition wall 29 is increased, the surface area of the phosphor layer is increased, and the luminance is increased.

Such a partition wall 29 can be formed by the same manufacturing procedure as a conventional simple linear partition wall. Only the mask pattern that defines the plan view shape needs to be changed. As a forming method, there are a method of patterning a solid film-like material layer by sandblasting, and a method of performing multiple printing of a paste using a screen.

FIG. 4 is a plan view showing the positional relationship between the partition and the main electrode.

The main electrodes X and Y are a laminate of a strip-shaped transparent conductive film 41 and a strip-shaped metal film 42 having a smaller width.
As described above, the metal film 42 is disposed at the center of the transparent conductive film 41 in the column direction, and the width thereof is
Greater than. Therefore, when viewed from the front side, the protrusion 29B is hidden by the metal film 42 and cannot be seen. This is suitable for increasing the contrast of the screen. That is, in a so-called reflective structure in which the phosphor layer is arranged on the back side of the discharge space, a method of increasing the luminance by forming the partition walls 29 with a highly reflective material is applied. The light emitted from the surface of the phosphor layer and reflected toward the back is reflected toward the front. But,
While the luminance is improved, there is a problem that the external light is reflected on the upper surface of the partition wall 29 to deteriorate the contrast. In particular, in the partition 29 having the protrusion 29B, the upper surface of the partition is increased by the amount of the protrusion 29B as compared with the case where only the base 29A is provided. Therefore, the projection 29B is hidden by the metal film 42 having a surface layer having a lower reflectivity than the projection 29B, so that the decrease in contrast due to the provision of the projection 29B is reduced. As a material for the partition wall, a low-melting glass paste mixed with white powder (titanium oxide, alumina, etc.) is generally used. Metal film 42
Has a lower reflectance than the whitened partition wall 29. The same effect can be obtained by forming the metal film 42 by baking a silver paste containing a black filler.

The PDP 1 having the above configuration is mainly used as a display device of a wall-mounted television receiver in combination with a circuit unit for realizing interlace driving.

FIG. 5 is a configuration diagram of the display device 100 according to the present invention.

The display device 100 includes a PDP 1 and a drive unit 80. The drive unit 80 includes a controller 81, a frame memory 82, a data processing circuit 8
3, a power supply circuit 84, a scan driver 85, a sustain circuit 86, and an address driver 87. The sustain circuit 86 includes an odd X driver 861, an even X driver 862, an odd Y driver 863, and an even Y driver 864. The drive unit 80 is a PDP
1, and each driver is electrically connected to an electrode of the PDP 1 by a flexible cable (not shown). The drive unit 80 receives frame data DF for each pixel indicating the luminance level (gradation level) of each color of R, G, B from an external device such as a TV tuner or a computer, and various synchronization signals (CLK, HSYNC, VSYNC). Entered with

The frame data DF is stored in the frame memory 8
After the image data is once stored in 2, the data processing circuit 83 divides the frame into a predetermined number of subfields and converts them into subfield data Dsf for performing gradation display.
The subfield data Dsf is stored in the frame memory 82 and is transferred to the address driver 87 as appropriate. The value of each bit of the subfield data Dsf is information indicating the necessity of lighting of the cell in the subfield, more specifically, information indicating the necessity of the address discharge.

The scan driver 85 individually applies a drive voltage to the main electrode Y in addressing. The odd-numbered X driver 861 applies a drive voltage to the odd-numbered ones of the main electrodes X at a time. The even-numbered X driver 862 applies a driving voltage to even-numbered main electrodes X at a time. The odd-numbered Y driver 863 applies a drive voltage to the odd-numbered main electrodes Y at a time. Even Y driver 8
Reference numeral 64 applies a drive voltage to even-numbered main electrodes Y at a time. The electrical commonization of the main electrodes X and Y is not limited to the connection on the panel as shown, but can be performed by wiring inside the driver or wiring on the connection cable. The address driver 87 has the subfield data D
A drive voltage is selectively applied to a total of M address electrodes A according to sf. These drivers are supplied with predetermined power from a power supply circuit 84 via a wiring conductor (not shown).

Next, a method of driving the PDP 1 will be described.

FIG. 6 is a diagram showing the structure of a frame. P
When driving DP1, the frame F which is image information of one scene is divided into an odd field f1 and an even field f2.
Into two parts. Then, an odd-numbered row is displayed in the odd-numbered field f1, and an even-numbered row is displayed in the even-numbered field f2. That is, information of one scene is displayed in an interlace format.

In order to perform gradation display (color reproduction) by binary lighting control, each of the odd field f1 and the even field f2 is divided into, for example, eight subframes sf1, sf2, sf3, sf4, sf5, and sf.
6, sf7, sf8. In other words, each field is replaced with a set of eight subframes sf1 to sf8. The relative ratio of luminance in these subfields sf1 to sf8 is approximately 1: 2: 4: 8: 16: 3.
The number of lighting sustain discharges in each of the subfields sf1 to sf8 is set by weighting so as to be 2: 64: 128. RG by lighting / non-lighting combination in subfield units
Since 256 levels of luminance can be set for each color of B, the number of colors that can be displayed is 256 ³ . However, it is not necessary to display the subfields sf1 to sf8 in the order of the luminance weight. For example, a subfield sf with a large weight
8 can be optimized in the middle of the field period Tf.

The sub-field period Tsf _j allocated to each sub-field sf _j (j = 1 to 8) includes a preparation period TR for equalizing the charge distribution of the entire screen, and an address period TA for forming a charge distribution according to display contents. , And a sustain period TS for maintaining a lighting state in order to secure luminance according to the gradation level. Each subfield period Tsf
_{In j} , the lengths of the preparation period TR and the address period TA are constant regardless of the luminance weight, but the length of the sustain period TS is longer as the luminance weight is larger. That is, 1
The lengths of eight sub-field periods Tsf _j corresponding to one field f are different from each other.

FIG. 7 is a voltage waveform diagram showing an example of the driving sequence.

In each subfield of the odd field f1, first, a write pulse Prx having a peak value exceeding the discharge start voltage is applied to all the main electrodes X in the preparation period TR. At this time, the write pulse P is applied to all the address electrodes A.
A pulse Pra for canceling rx is applied. Excess wall charges are formed in each cell by the surface discharge due to the application of the write pulse Prx, and the wall charges are almost completely eliminated by the self-erasing discharge at the falling edge of the pulse. Next, in the address period TA,
A row is selected by sequentially applying a scan pulse Py to each main electrode Y. In synchronization with the scan pulse Py, an address pulse Pa is applied to an address electrode A corresponding to a cell to be lit in a selected row to generate an address discharge. In addition, a pulse is alternately applied to the odd-numbered main electrodes X and the even-numbered main electrodes X so that an appropriate surface discharge occurs in the odd-numbered rows. Then, in the sustain period TS, the sustain pulse Ps is applied to the main electrode X and the main electrode Y at the same timing for the odd-numbered rows and at the same time for the even-numbered rows.

On the other hand, in each subfield of the even field f2, the write pulse Prw is applied to all the main electrodes X during the preparation period TR to erase wall charges. Also in the address period TA, a scan pulse Py is applied to each main electrode Y in order, and an address pulse Pa is applied to a predetermined address electrode A, as in the odd field f1. In the even-numbered field f2, the even-numbered main electrode X is synchronized with the scan pulse Py so that an appropriate surface discharge occurs in the even-numbered row.
And the odd-numbered main electrodes X are alternately applied with a pulse. Then, in the sustain period TS, the sustain pulse Ps is applied to the main electrode X and the main electrode Y at an even-numbered row alternately and at an odd-numbered row simultaneously.

FIG. 8 is a plan view showing a modification of the partition pattern.

The projections 29B are arranged at a pitch of one cell in the partition 29 described above, but the projections 29Bb are arranged at a pitch of two cells in the partition 29b of FIG. The positions of the protrusions 29Bb are shifted by one cell pitch between the left partition wall 29b and the right partition wall 29b in each row.
Each constriction in the row space is formed by one projection 29Bb.

In the example shown in FIG. 8B, the partition 29 has a linear band shape.
c and the partition 29d having the protrusion 29Bd are alternately arranged. Each constriction in the row space is one protrusion 29Bb.
Formed by

FIG. 9 is a plan view showing a modification of the shape of the main electrode.

Each of the main electrodes Xb and Yb is composed of a metal film 42 extending in the row direction over the entire length of the screen, and a strip-shaped transparent conductive film 41b long in each column in the column direction.
The metal film 42 is superimposed on the center of the transparent conductive film 41b in the column direction, and hides the protrusion of the partition. The electrode shape in this example corresponds to a shape in which a part of a straight band is cut out. Since the notch reduces the electrode area, the discharge current is reduced and the load on the drive circuit is reduced. Further, the capacitance between the main electrodes is reduced. The decrease in luminance due to the decrease in discharge current can be compensated for by increasing the frequency of the drive voltage for maintaining lighting.

FIG. 10 is a view showing a second example of the three-dimensional structure of the partition.

In the above-described partition 29, the height of the projection 29B is the same as that of the base 29A.
The protrusion 29Be is lower than the base 29A. The shape of the partition wall 29e in the plan view is the same as that of the partition wall 29 in FIG.
According to such a structure, the degree of freedom in designing the constricted portion of the row space is high, so that it is easy to achieve both suppression of the spread of discharge and securing of a flow path for exhaust and priming. Further, the projection 29Be may be formed of a material different from that of the base 29A, so that a decrease in contrast due to external light may be reduced.

FIG. 11 is a view showing a third example of the three-dimensional structure of the partition.

The internal structure described above is for narrowing the row space in the partition arrangement direction to divide cells, but the internal structure of this embodiment is for narrowing the row space in the thickness direction of the panel. That is, the partition walls 2 in a band shape in plan view arranged at substantially equal intervals.
9f and a projection 2 provided to connect the partition walls
9C defines a discharge space. The protrusion 29C is provided for each arrangement of the main electrode, and is lower than the partition 29f. The height of the projection 29C is selected so that the row spaces are continuous at a stage after the phosphor layer is provided. According to this structure, the phosphor layers can be provided in a stripe shape as in the conventional example.

[0053]

According to the first to fifth aspects of the present invention,
The resolution can be increased by suppressing the spread of discharge in the column direction.

According to the second aspect of the present invention, the light emitting area increases and the luminance increases.

According to the fourth aspect of the present invention, it is possible to prevent a decrease in contrast.

[Brief description of the drawings]

FIG. 1 is a schematic view of an electrode matrix according to the present invention.

FIG. 2 is a perspective view showing an internal structure of a PDP according to the present invention.

FIG. 3 is a schematic diagram of a three-dimensional structure of a partition.

FIG. 4 is a plan view showing a positional relationship between a partition and a main electrode.

FIG. 5 is a configuration diagram of a display device according to the present invention.

FIG. 6 is a diagram showing a configuration of a frame.

FIG. 7 is a voltage waveform diagram showing an example of a driving sequence.

FIG. 8 is a plan view showing a modified example of the partition pattern.

FIG. 9 is a plan view showing a modification of the main electrode shape.

FIG. 10 is a view showing a second example of the three-dimensional structure of the partition.

FIG. 11 is a diagram showing a third example of the three-dimensional structure of the partition.

[Explanation of symbols]

 1 PDP (Plasma Display Panel) 100 Display ES Screen L Row X, Xb, Y, Yb Main Electrodes 29, 29b, 29, 29d, 29e, 29f Partition 29A Base 29B, 29Bb, 29Bd, 29Be Projection 29C Projection 80 Drive Unit (drive circuit)

Continuation of the front page F term (reference) 5C040 FA01 FA04 GB03 GB14 GC05 GC06 GF02 GF12 5C080 AA05 BB05 CC03 DD07 DD09 EE19 EE29 FF12 HH04 JJ02 JJ06

Claims (11)

[Claims] A plurality of main electrodes defining a row of a screen are arranged so that surface discharge can be generated using adjacent main electrodes as an electrode pair, and a plurality of partition walls arranged in a row direction apart from each other. A plasma display panel in which a discharge space in a screen is partitioned for each column by at least one of a pair of partition walls corresponding to each column of the screen, at least one of a base in a plan view band shape extending over the entire length of the screen, and a column. A plurality of protrusions projecting in the row direction from the base at the arrangement position of the main electrode in a direction, and having a structure in which a column space as a discharge space for one column is periodically narrowed by the protrusions. A plasma display panel characterized by the following. 2. The plasma display panel according to claim 1, wherein said plurality of main electrodes are arranged in parallel at substantially equal intervals. 3. The plasma display panel according to claim 1, wherein the height of the projection is lower than that of the base. 4. The plasma display panel according to claim 1, further comprising a phosphor layer covering a side surface of said base and a side surface of said projection. 5. The main electrode comprises a transparent conductive film and a metal film, and is disposed on the front side with respect to a discharge space.
The plasma display panel according to claim 4. 6. The plasma display panel according to claim 5, wherein said metal film is arranged so as to overlap with said projection. 7. A plasma display panel according to claim 1, wherein one frame is divided into two fields, one field is displayed by odd lines, and the other field is displayed by even lines. A driving circuit for applying a driving voltage to the electrode pair. 8. A plurality of main electrodes defining a row of a screen are arranged so that surface discharge can be generated using adjacent main electrodes as an electrode pair, and a plurality of strips arranged in a row direction apart from each other. A plasma display panel in which a discharge space in a screen is partitioned for each column by partition walls, wherein a plurality of projections lower than the partition walls are arranged at positions where the main electrodes are arranged between the partition walls. A plasma display panel which is provided so as to be connected and has a structure in which a column space, which is a discharge space for one column, is periodically narrowed by the projection. 9. The plasma display panel according to claim 8, further comprising a phosphor layer covering a side surface of said partition and a side surface of said projection. 10. The plasma display panel according to claim 1, wherein said main electrode comprises a transparent conductive film and a metal film, and is disposed on a front side with respect to a discharge space. 11. A plasma display panel according to claim 8, wherein one frame is divided into two fields, one field is displayed by odd lines, and the other field is displayed by even lines. A driving circuit for applying a driving voltage to the electrode pair.