JP2004165172A - Plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma display panel in which discharge efficiency can be improved and a cross talk can be prevented. <P>SOLUTION: The plasma display panel comprises an address electrode which passes through each discharge cell that becomes a picture element unit of the plasma display panel, a second sustaining electrode which is located at the periphery on both sides of the discharge cell in the direction crossing the address electrode and supplies a second sustaining pulse, and at least one or more first sustaining electrodes which are located at the center of the discharge cell in the direction crossing the address electrode and supplies a first sustaining pulse alternately with the second sustaining pulse. <P>COPYRIGHT: (C)2004,JPO

Description

  The present invention relates to a plasma display panel, and more particularly to a plasma display panel capable of improving discharge efficiency and preventing crosstalk.

  2. Description of the Related Art A plasma display panel (PDP) is a display device that utilizes the fact that ultraviolet light generated by the discharge of gas excites a phosphor, and visible light is generated from the excited phosphor. PDPs have advantages in that they are thinner than a cathode ray tube (CRT), which has been widely used as a display means, and can realize a light, sharp, large screen. A PDP includes a plurality of discharge cells arranged in a matrix. One discharge cell constitutes one pixel of the screen.

FIG. 1 is a perspective view illustrating a structure of a discharge cell of a conventional three-electrode AC surface discharge PDP.
Referring to FIG. 1, a discharge cell of a conventional three-electrode AC surface discharge type PDP includes a scan / sustain electrode (12Y) and a common sustain electrode (12Z) formed on an upper panel (10). Address electrodes (20X) formed on the lower panel (18).

  The scanning / sustaining electrode (12Y) and the common sustaining electrode (12Z) are formed of indium tin oxide (ITO). Since such ITO has a high resistance value, it supplies a signal through thinner opaque and highly conductive bus electrodes (13YB, 13ZB) on the ITO electrode so that a uniform voltage is applied to each discharge cell. ing.

  An upper dielectric layer (14) and a protective film (16) are laminated on the surface of the upper panel (10) in which the scan / sustain electrodes (12Y) and the common sustain electrodes (12Z) are formed in parallel. Wall charges generated during the plasma discharge are accumulated in the upper dielectric layer (14). The protective film (16) is for preventing the upper dielectric layer (14) from being damaged by sputtering generated at the time of plasma discharge and increasing the efficiency of secondary electron emission. As the protective film (16), magnesium oxide (MgO) is usually used.

  A lower dielectric layer (22) and a partition (24) are formed on the surface of the lower panel (18) on which the address electrodes (20X) are formed, and fluorescent light is formed on the surfaces of the lower dielectric layer (22) and the partition (24). A body layer (26) is applied. The address electrode (20X) is formed in a direction crossing the scan / sustain electrode (12Y) and the common sustain electrode (12Z).

  The partition (24) is formed in parallel with the address electrode (20X). The address electrode (20X) is arranged between the partition (24) and the partition (24). The partition walls (24) prevent the ultraviolet light and the visible light generated by the discharge from leaking to the adjacent discharge cells. The phosphor layer (26) is excited by ultraviolet rays generated during the plasma discharge to generate any one of red, green and blue visible rays. An inert gas for gas discharge is injected into a discharge space provided between the upper panel (10) / lower panel (18) and the partition.

  The overall arrangement of electrode lines and discharge cells of the PDP shown in FIG. 1 is as shown in FIG.

  Referring to FIG. 2, it can be seen that the discharge cell 28 is formed at the intersection of the scan / sustain electrode Y and the common sustain electrode Z with the address electrode line X. The bus electrodes (YB, ZB) are formed such that a uniform voltage can be applied to all the discharge cells (28) along the edges of the scan / sustain electrodes (Y) and the common sustain electrodes (Z). The partition wall (24) is aligned with the address electrode line (X).

  In such a surface discharge type PDP, one frame is divided into a number of subfields and driven in order to express a gray level of an image. Each subfield is further divided into a reset period for uniformly generating a discharge, an address period for selecting a discharge cell, and a sustain period for expressing a gray level according to the number of discharges.

For example, when an image is to be displayed at 256 gray levels, a frame period (16.67 ms) corresponding to 1/60 second is divided into eight subfields. As described above, each of the eight subfields is further divided into a reset period, an address period, and a sustain period. While each sub-field reset period and the address period of the same every sub-field, the sustain period in the range of each sub-field is 2 ^{0-2 7,} i.e. 2 ⁿ (n = 0,1,2,3,4 , 5, 6, 7). As described above, since the sustain period is different in each subfield, the light emission amount is different, and the gray level of the image can be expressed.

A driving waveform as shown in FIG. 3 is supplied to each electrode line of the PDP for each subfield in order to represent a gray level.
Referring to FIG. 3, one subfield includes a reset period for initializing an entire screen, an address period for writing data while sequentially scanning the entire screen, and a sustain period for maintaining a light emitting state of a cell in which data is written. Are driven separately.

The reset period to cause a reset discharge between the common sustain electrode lines (Z) and the scan / sustain electrode lines by applying a reset pulse (V _R) to the common sustain electrode lines (Z) (Y). When a reset discharge occurs between the common sustain electrode line (Z) and the scan / sustain electrode line (Y), priming charged particles and wall charges are formed in each discharge cell.

  During the address period, a scan pulse (-Vs) is sequentially applied to the scan / sustain electrode line (Y), and a data pulse (Vd) is applied to the address electrode line (X) in synchronization with the scan pulse (-Vs). Supplied. At this time, a DC voltage of a predetermined level is applied to the common sustain electrode line (Z).

  In the sustain period, sustain pulses (Vsus) having the same pulse width and voltage are alternately applied to the scan / sustain electrode line (Y) and the common sustain electrode line (Z), and the discharge cells selected by the address discharge are discharged. Sustain discharge.

  As described above, in the conventional PDP, a sustain pulse is alternately applied to the scan / sustain electrode line and the common sustain electrode line which are formed adjacent to each other during the sustain period. Accordingly, an erroneous discharge may occur between the scan / sustain electrode line and the common sustain electrode line included in the discharge cells positioned adjacent to each other with the partition wall therebetween.

  In addition, since the scan / sustain electrode line and the common sustain electrode line are formed at the center of the discharge cell, the sustain discharge is concentrated at the center of the upper panel, and the utilization of the discharge space is reduced. That is, there is a problem that the discharge area of the sustain discharge is reduced and the luminous efficiency is reduced.

  The partition is formed alongside the address electrode line. Accordingly, light generated by a discharge generated in an arbitrary discharge cell may affect a discharge cell formed above / below (in the direction on the drawing of FIG. 2) an arbitrary discharge cell. That is, crosstalk occurs between discharge cells formed above / below an arbitrary discharge cell.

Meanwhile, in order to improve the discharge efficiency, a five-electrode AC surface discharge type PDP has been proposed as shown in FIG.
Referring to FIG. 4, a conventional five-electrode AC surface discharge type PDP includes first and second trigger electrodes (34Y) formed on the surface of an upper panel (30) so as to be located at the center of a discharge cell. , 34Z) and a first sustaining electrode (32Y) and a second sustaining electrode (32Z) formed on the upper panel (30) in parallel with the trigger electrode and away from the trigger electrode so as to be located on the edge side of the discharge cell. ), And address electrodes (42X) formed on the lower panel (40) in a direction crossing the trigger electrodes (34Y, 34Z), the first sustain electrodes (32Y), and the second sustain electrodes (32Z). .

  An upper dielectric layer (36) is formed on the upper panel (30) in which the first sustain electrode (32Y), the first trigger electrode (34Y), the second trigger electrode (34Z) and the second sustain electrode (32Z) are formed side by side. ) And the protective film (38) are laminated.

  A lower dielectric layer (44) and a partition wall (46) are formed on the lower panel (40) on which the address electrodes (42X) are formed, and a fluorescent material is formed on the surfaces of the lower dielectric layer (44) and the partition wall (46). A body layer (48) is applied.

  The trigger electrodes (34Y, 34Z) formed at a narrow interval (Ni) at the center of the discharge cell receive the supply of the AC pulse during the sustain period and start the sustain discharge. The first sustaining electrode (32Y) and the second sustaining electrode (32Z) formed on the edge side of the discharge cell at a wide interval (Wi) maintain the plasma discharge after the discharge is started by the trigger electrodes (34Y, 34Z). Used to maintain.

  The operation process of such a five-electrode AC surface discharge type PDP will be described in detail with reference to FIG. FIG. 5 shows the upper panel rotated 90 ° with respect to the lower panel to show all electrode structures in one discharge cell.

  During the reset period, a reset pulse is supplied to the second trigger electrode (34Z) of the discharge cell to generate a reset discharge for initializing the discharge cell.

  In the address period, a scan pulse is sequentially supplied to the first trigger electrode (34Y), and a data pulse synchronized with the scan pulse is supplied to the address electrode (42X). At this time, an address discharge occurs in the discharge cells to which the data is supplied.

  During the sustain period, a first AC pulse is alternately applied to the first and second trigger electrodes (34Y, 34Z). Also, a second AC pulse having a higher voltage level than the first AC pulse is alternately applied to the first sustain electrode (32Y) and the second sustain electrode (32Z).

  When the first AC pulse is applied, discharge starts between the first and second trigger electrodes (34Y, 34Z). At this time, the first sustain electrode (32Y) and the second sustain electrode (32Z) generate a sustain discharge due to a priming effect of charged particles generated by the discharge between the first and second trigger electrodes (34Y, 34Z).

  In such a conventional five-electrode PDP, the sustain discharge can be started by using the trigger electrodes (34Y, 34Z) to extend the discharge path of the sustain discharge.

  As described above, in such a conventional five-electrode PDP, a sustain pulse is alternately applied to the first sustain electrode and the second sustain electrode formed adjacent to each other during the sustain period. Therefore, an erroneous discharge may occur between the first sustaining electrode and the second sustaining electrode that are formed adjacent to each other with the partition wall interposed therebetween.

  Since the barrier ribs are formed alongside the address electrodes, light generated in a specific discharge cell is supplied to a discharge cell formed adjacent to the specific discharge cell in the barrier rib direction. That is, the crosstalk phenomenon occurs between the discharge cells located in the direction in which the partition walls are arranged.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a plasma display panel capable of improving discharge efficiency and a driving method thereof.
It is another object of the present invention to provide a plasma display panel and a driving method thereof capable of preventing crosstalk between discharge cells formed adjacent to each other.

  In order to achieve the above object, a plasma display panel according to the present invention includes an address electrode passing through each discharge cell serving as a pixel unit of the plasma display panel, and peripheral portions on both sides of the discharge cell in a direction crossing the address electrode. A second sustain electrode for supplying a second sustain pulse, and at least one of a second sustain pulse for intersecting the second sustain pulse and being located at a center of the discharge cell in a direction crossing the address electrode. At least one first sustain electrode.

  It is preferable that a bus electrode is provided on the first storage electrode, and the bus electrode is provided at the center of the first storage electrode, or is formed along edges on both sides of the first storage electrode.

  In one embodiment, a scan / sustain driver connected to a first sustain electrode to supply a scan pulse and a first sustain pulse, and a common sustain driver connected to a second sustain electrode to supply a second sustain pulse. Is provided.

  In another embodiment, a scan / sustain driver connected to the first sustain electrode to supply a scan pulse and a first sustain pulse, and a common drive connected to the second sustain electrode to supply a reset pulse and a second sustain pulse. And a maintenance drive unit.

  In still another embodiment, a dielectric layer formed to cover the first and second storage electrodes, and at least one or more floating layers on the surface of the dielectric layer along with the first and second storage electrodes. An electrode is formed.

  Another embodiment of the plasma display panel according to the present invention includes a pair of sustain electrodes formed on both sides of a discharge cell of an upper panel, and first and second pairs formed between the pair of sustain electrodes and the pair of sustain electrodes. A trigger electrode, a sustain electrode pair, a dielectric layer applied to the entire upper panel so as to cover the first and second trigger electrodes, and at least one or more formed in parallel with the sustain electrode on the surface of the dielectric layer And a floating electrode.

  The driving method of the plasma display panel according to the present invention may include a method of driving a second sustain electrode formed on both sides of a discharge cell, an address electrode formed in a direction crossing the second sustain electrode, and a second sustain electrode. At least one of the first and second sustain electrodes to initialize a discharge cell having at least one or more first sustain electrodes formed side by side with the second sustain electrode. Supplying a reset pulse to the electrode, supplying a scan pulse to the first sustain electrode to select a discharge cell to emit light, supplying a data pulse to the address electrode in synchronization with the scan pulse, Alternately applying a sustain pulse to the first and second sustain electrodes to discharge the discharge cells to be discharged.

  Another driving method of the plasma display panel according to the present invention includes a second sustain electrode formed on both sides of the discharge cell, an address electrode formed in a direction crossing the second sustain electrode, and a second sustain electrode. Discharging a cell including at least one or more first sustain electrodes formed side by side with the second sustain electrode, wherein a reset pulse is applied to the first sustain electrode to initialize the discharge cells. Supplying a scan pulse to the second sustain electrode to select a discharge cell to emit light; supplying a data pulse to the address electrode in synchronization with the scan pulse; Alternately applying a sustain pulse to the first and second sustain electrodes to discharge the cells.

  According to the plasma display panel and the method of driving the same according to the present invention, at least one or more first electrodes formed at the center of the discharge cell and one second electrode formed at the periphery of the discharge cell. Since a sustain discharge occurs in between, the discharge space can be efficiently utilized. That is, a sustain discharge having a long discharge path between the first electrode and the second electrode can be generated.

  Further, since one second electrode is formed at the periphery of the discharge cell with the first electrode interposed therebetween, the same pulse is supplied to the electrodes formed at the boundary between adjacent discharge cells. Thus, crosstalk between discharge cells can be prevented. At the same time, since the barrier ribs are provided alongside the first and second electrodes, it is possible to prevent crosstalk between adjacent discharge cells.

  In addition, by forming a floating electrode below the second electrode formed at the periphery of the discharge cell, crosstalk between adjacent discharge cells can be prevented.

  As described above, according to the plasma display panel and the method of driving the same according to the present invention, at least one or more first electrodes formed at the center of the discharge cell and the first electrode formed at the periphery of the discharge cell. Since a sustain discharge occurs between the second electrode and the second electrode, the discharge space can be efficiently used.

  Further, since one second electrode is formed on both peripheral portions of the discharge cell with the first electrode interposed therebetween, crosstalk between the discharge cells can be prevented. In addition, by providing the partition in the direction in which the first and second electrodes are arranged, it is possible to prevent crosstalk between the discharge cells adjacent to each other in the direction of the electrodes.

  Furthermore, by forming a floating electrode below the second electrode formed at the periphery of the discharge cell, crosstalk between adjacent discharge cells can be prevented.

  From the above description, those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention. Therefore, the technical scope of the present invention is not limited to the content described in the detailed description of the specification, but must be defined by the appended claims.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS.

FIG. 6 is a plan view illustrating an electrode structure of the PDP according to the first embodiment of the present invention.
Referring to FIG. 6, the electrodes of the PDP according to the first embodiment of the present invention have an address electrode line (X, only X1 to X5 are shown in the figure) and a direction crossing the address electrode line (X). A scan formed between the first and second common sustain electrode lines (Z, Z ′, respectively, which are shown as 1 to 3) and the first and second common sustain electrode lines (Z, Z ′). / Sustain electrode lines (Y, Y1 to Y3 in the figure).

  The scanning / sustaining electrode line (Y), the first common sustaining electrode line (Z), the second common sustaining electrode line (Z ') running in parallel, and the intersection with the address electrode line (X) orthogonal to them are A discharge cell (30) is formed. Therefore, the first and second common sustain electrodes are arranged at both ends of the discharge cell, and the scan / sustain electrodes are arranged between them.

  The scanning / sustaining electrode line (Y) and the first and second common sustaining electrode lines (Z, Z ') are transparent electrodes formed of ITO. Since such an ITO has a high resistance value, bus electrodes (YB, ZB, ZB ') are formed on these surfaces so that a uniform voltage can be applied to all the discharge cells.

  The width of the scan / sustain electrode line (Y) is set wider than the widths of the first and second common sustain electrode lines (Z, Z ').

  The partition wall (52) is formed in the direction parallel to the address electrode (X) as in the related art. The scan / sustain electrode line (Y) is located at the center of the discharge cell (50).

FIG. 7 is a view illustrating a driving apparatus of the PDP illustrated in FIG.
Referring to FIG. 7, a driving apparatus of a PDP according to a first embodiment of the present invention includes a scan / sustain driver (54) for driving a scan / sustain electrode line (Y), and first and second common sustain electrodes. A common sustain drive (56) for driving the line (Z, Z ') is provided.

  The scan / sustain driver 54 supplies a scan pulse and a sustain pulse to the scan / sustain electrode line (Y). The common sustain driving unit (56) supplies a sustain pulse to the first and second common sustain electrode lines (Z, Z '). The address electrode line (X) receives video data from an address driver (not shown) so as to be synchronized with a scan pulse.

A drive waveform as shown in FIG. 8 is supplied to each electrode line of the PDP for each subfield.
Referring to FIG. 8, one subfield includes a reset period for initializing the entire screen, an address period for writing data while sequentially scanning the entire screen for each electrode, and maintaining the light emitting state of the cell in which the data is written. It is driven in divided periods.

In the reset period, a reset pulse (V _R ) is applied to the first and second common sustain electrode lines (Z, Z ′), and the first and second common sustain electrode lines (Z, Z ′) and the scan / sustain electrode. A reset discharge can occur between lines (Y). When a reset discharge occurs between the first and second common sustain electrode lines (Z, Z ') and the scan / sustain electrode lines (Y), uniform charged particles and wall charges are formed in all the discharge cells (50). .

  During the address period, a scan pulse (-Vs) is sequentially applied to the scan / sustain electrode line (Y), and a data pulse (Vd) is applied to the address electrode line (X) so as to be synchronized with the scan pulse (-Vs). Supplied.

  During the sustain period, a sustain pulse (Vsus) having the same pulse width and voltage is alternately applied to the scan / sustain electrode line (Y) and the first and second common sustain electrode lines (Z, Z '), and the address discharge is performed. Sustain discharge is performed on the selected discharge cell.

  As shown in FIG. 9, the sustain discharge includes a scan / sustain electrode line (Y) formed at the center of the discharge cell (50) and two common sustain electrodes formed at the periphery of the discharge cell (50). Happens between line (Z, Z '). In other words, a discharge path is generated between the first and second common sustain electrode lines (Z, Z ') and the scan / sustain electrode lines (Y). Although each is short, the discharge path becomes long when both are combined. As described above, when the sustain discharge having a long discharge path occurs, the amount of ultraviolet rays generated is increased, and the light emitting area is increased, so that the light emitting efficiency is improved. In the figure, the same reference numerals as those shown in FIG. 1 are used for the reference numerals.

  In the first embodiment of the present invention, erroneous discharge between adjacent discharge cells (50), that is, crosstalk can be prevented. Specifically, during the sustain period, the same pulse is supplied to the first and second common sustain electrode lines (Z, Z '). That is, the same pulse is supplied to the first and second common sustain electrode lines (Z, Z ′) formed near the adjacent portions of the discharge cells (50) formed adjacent to each other, that is, in the peripheral portion. Therefore, crosstalk between the discharge cells (50) can be prevented.

  Meanwhile, in the first embodiment of the present invention, as shown in FIG. 10, a second partition wall 58 may be additionally provided in parallel with the first and second common storage electrode lines Z and Z '. Such a second partition wall (58) is formed above / below (on the drawing) the discharge cell (50), and the light generated by the discharge is formed adjacently above / below a specific discharge cell. To prevent the discharge cells from being supplied to the discharge cells.

FIG. 11 is a plan view illustrating an electrode structure of a PDP according to a second embodiment of the present invention.
Referring to FIG. 11, the electrodes of the PDP according to the second embodiment of the present invention include an address electrode line (X) and first and second common sustain electrodes formed in a direction crossing the address electrode line (X). The scan line includes a line (Z, Z ′) and a scan / sustain electrode line (Y) formed between the first and second common sustain electrode lines (Z, Z ′). The arrangement of the electrode lines is the same as in the previous embodiment.

  A discharge cell (50) is located at a position where the address electrode line (X) intersects with the other electrode lines, that is, the scan / sustain electrode line (Y) and the first and second common sustain electrode lines (Z, Z '). are doing.

  The scanning / sustaining electrode line (Y) and the first and second common sustaining electrode lines (Z, Z ') are transparent electrodes formed of ITO. Since the ITO has a high resistance value, the bus electrodes (YB, YB, YB) are disposed on the surfaces of the scan / sustain electrode lines (Y) and the first and second common sustain electrode lines (Z, Z ′) to reduce the resistance. ZB, ZB ′) are formed.

  In the first embodiment of the present invention, one bus electrode (YB) is formed on the scanning / sustaining electrode line (Y). In the second embodiment, one bus electrode (YB) is formed on the scanning / sustaining electrode line (Y). (YB, YB ′) are formed.

  In the first embodiment of the present invention, one bus electrode (YB) is formed on a scan / sustain electrode line (Y) formed with a wide width. When one bus electrode (YB) is formed on the scanning / sustaining electrode line (Y) formed with such a wide width, a voltage drop may occur due to the resistance value of the scanning / sustaining electrode line (Y). is there.

  Therefore, in the second embodiment of the present invention, one bus electrode (YB, YB ') is formed along each side of the scanning / sustaining electrode line (Y). Providing the two bus electrodes in this way prevents a voltage drop that may occur due to the resistance component of the scan / sustain electrode line (Y), and lowers the discharge voltage to facilitate wall charges in the discharge cells. Can be formed. Also in the second embodiment of the present invention, the scan / sustain electrode lines (Y) and the first and second common sustain electrode lines (Z, Z ') are formed alongside the first embodiment. It can be additionally provided with the second partition wall (38). Other than that, the driving waveform and the operation process in the second embodiment of the present invention are the same as those in the first embodiment of the present invention, and thus the description is omitted.

FIG. 12 is a plan view illustrating an electrode structure of a PDP according to a third embodiment of the present invention.
Referring to FIG. 12, the electrodes of the PDP according to the third embodiment of the present invention include an address electrode line (X) and first and second common sustain electrode lines (Z, Z ') formed in a direction crossing the address electrode line (X). ) And first and second scan / sustain electrode lines (Y, Y ′) formed between the first and second common sustain electrode lines (Z, Z ′).

  The discharge cell (30) is located at the intersection of the address electrode line (X) and the other electrode lines.

  The first and second scan / sustain electrode lines (Y, Y ') and the first and second common sustain electrode lines (Z, Z') are transparent electrodes made of ITO. Since such an ITO has a high resistance value, it may not be possible to apply a uniform voltage to all the discharge cells. Therefore, the first and second scan / sustain electrode lines (Y, Y '), Bus electrodes (YB, YB'ZB, ZB ') are formed on the surfaces of the first and second common sustain electrode lines (Z, Z').

  The partition wall (36) is formed in a direction parallel to the address electrode (X). The first and second scan / sustain electrode lines (Y, Y ') are disposed at the center of the discharge cell (30), and the first and second common sustain electrode lines (Z, Z) are disposed in the discharge cell (30). ') Are disposed at the periphery of the discharge cell (30) with the first and second scan / sustain electrode lines (Y, Y') interposed therebetween.

  In the first embodiment of the present invention, one scan / sustain electrode line (Y) is formed at the center of the discharge cell (50). However, in the third embodiment of the present invention, the discharge cell (50) is formed at the center of the discharge cell (50). One first and second scan / sustain electrode lines (Y, Y ') are formed.

  As described above, in the first embodiment, one scan / sustain electrode line (Y) is formed at the center of the discharge cell (50). In this case, the scan / sustain electrode line (Y) is formed during the sustain period. There is a possibility that a discharge is generated in one of the first and second common sustain electrode lines (Z, Z ′) and the other, and the discharge between the other is unstable.

  However, if two scan / sustain electrode lines (Y, Y ') are formed at the center of the discharge cell (50) as in the third embodiment of the present invention, the first common sustain electrode line (Y) is provided during the sustain period. Z) and the first scan / sustain electrode line (Y), and a discharge occurs between the second common sustain electrode line (Z ′) and the second scan / sustain electrode line (Y ′). Occurs. Therefore, in the third embodiment of the present invention, a stable discharge occurs in the discharge cell (50).

  In addition, the third embodiment of the present invention may further include a second partition (58) formed alongside the first and second common storage electrode lines (Z, Z ') as shown in FIG. it can. Other than that, the driving waveform and operation process in the third embodiment of the present invention are the same as those of the first embodiment of the present invention.

FIG. 14 illustrates a driving apparatus of the PDP illustrated in FIG.
Referring to FIG. 14, a driving apparatus of a PDP according to a third embodiment of the present invention includes a scan / sustain driver 60 for driving first and second scan / sustain electrode lines (Y, Y '), A common sustain driving unit (62) for driving the first and second common sustain electrode lines (Z, Z ').

  The scan / sustain driver 60 sequentially supplies a scan pulse and a sustain pulse to the first and second scan / sustain electrode lines (Y, Y '). At this time, the first and second scan / sustain electrode lines (Y, Y ') receive the same drive waveform from the scan / sustain driver (60).

  The common sustain driving unit (62) supplies a sustain pulse to the first and second common sustain electrode lines (Z, Z '). The address electrode line (X) receives supply of video data synchronized with a scan pulse from an address driver (not shown).

  During the sustain period, the first and second scan / sustain electrode lines (Y, Y ') and the first and second common sustain electrode lines (Z, Z') have the same sustain pulse (Vsus) having the same pulse width and voltage. Are applied alternately. When the sustain pulses are alternately applied, a sustain discharge is generated between the first common sustain electrode line (Z) and the first scan / sustain electrode line (Y) as shown in FIG. Sustain discharge also occurs between the electrode line (Z ') and the second scan / sustain electrode line (Y').

  That is, the first and second scan / sustain electrode lines (Y, Y ') formed at the center of the discharge cell (50) and the first and second electrodes formed at the periphery of the discharge cell (30). Since a sustain discharge is generated between the common sustain electrode lines (Z, Z '), the discharge space can be efficiently used.

  In addition, since four sustain electrode lines (Y, Y ', Z, Z') are formed in each discharge cell (50), a sustain discharge can be stably generated. The other drive waveforms and operation processes in the third embodiment of the present invention are the same as those in the first embodiment of the present invention, and a description thereof will be omitted.

  In the first to third embodiments of the present invention, the electrode formed at the center of the discharge cell (50) is used as the scan / sustain electrode (Y), and is formed at the periphery of the discharge cell (50). The used electrode was used as a common sustain electrode (Z). On the other hand, in the fourth embodiment, as shown in FIG. 16, an electrode formed at the center of the discharge cell (50) is used as a common sustain electrode (Z) and formed at the periphery of the discharge cell. The used electrodes are used as scanning / sustaining electrodes (Y). The driving method is not particularly different from the previous embodiment.

  FIG. 17 is a cross-sectional view of one cell showing a discharge cell of a PDP according to a fifth embodiment of the present invention. The fifth embodiment has a structure in which floating electrodes (68, 69) are added to the five-electrode AC surface discharge PDP shown in FIG. FIG. 17 shows the lower panel rotated 90 ° with respect to the upper panel so that all electrode structures can be seen in one discharge cell.

  Referring to FIG. 17, a PDP according to a fifth embodiment of the present invention includes first and second trigger electrodes (64Y, 64Z) disposed at the center of a discharge cell and a first sustain electrode (66Y) disposed at an edge of the discharge cell. ) And a second sustain electrode (66Z). An upper dielectric layer (72) is formed to cover the electrodes, and first and second floating electrodes (68, 69) are formed on the surface of the upper dielectric layer (72) on both sides of the discharge cell. , 66Z). The lower panel is provided with address electrodes (76X) in a direction orthogonal to the electrodes of these upper panels.

  A partition wall (74) is formed between the upper dielectric layer (72) and the lower dielectric layer (78), and a phosphor layer (70) is formed on the surface of the lower dielectric layer (78) and the partition wall (74). Is applied.

  The first and second trigger electrodes (64Y, 64Z) formed at a narrow interval in the center of the discharge cell receive the supply of the AC pulse during the sustain period and start the sustain discharge. The first sustain electrode (66Y) and the second sustain electrode (66Z) formed at a wide interval on the edge side of the discharge cell are used to maintain the plasma discharge after the discharge is started by the trigger electrodes (64Y, 64Z). Is done. The address electrode (76X) receives the supply of the data pulse during the address period and causes an address discharge with the first trigger electrode (64Y) that receives the scan pulse.

  The widths of the floating electrodes (68, 69) are smaller than the widths of the first sustaining electrode (66Y) and the first sustaining electrode (66Z). The floating electrodes (68, 69) are for preventing crosstalk between adjacent discharge cells.

  This will be described in detail with reference to FIG. During the sustain period, an AC pulse is alternately supplied to the first sustain electrode (66Y) and the first sustain electrode (66Z). When an AC pulse having a predetermined voltage level is applied to the first sustain electrode (66Y), the first sustain electrode (66Y) is applied to the floating electrode (68) formed below the first sustain electrode (66Y). , A voltage of about half of the AC pulse applied to is applied.

  Therefore, erroneous discharge with the second sustain electrode (67Z) formed adjacent to the partition wall (74) can be prevented. That is, an erroneous discharge between the floating electrodes (68, 80) is prevented because a low voltage difference occurs between the floating electrodes (68, 80) formed adjacent to each other with the partition wall (74) therebetween. be able to.

  When an AC pulse having a predetermined voltage level is applied to the second storage electrode (66Z), the floating electrode (69) formed below the second storage electrode (66Z) has the second storage electrode. A voltage of about half of the AC pulse applied to (66Z) is induced. Therefore, erroneous discharge between the floating electrodes (69, 82) formed adjacent to each other with the partition wall (74) interposed therebetween can be prevented. The fifth embodiment of the present invention in which such floating electrodes are arranged can be applied to the first to fourth embodiments of the present invention.

It is a perspective view showing the discharge cell structure of the plasma display panel of the conventional three-electrode AC surface discharge. FIG. 2 is a plan view illustrating an electrode structure of the plasma display panel illustrated in FIG. 1. FIG. 2 is a waveform diagram illustrating a driving waveform supplied to the plasma display panel illustrated in FIG. 1. FIG. 4 is a perspective view showing a discharge cell structure of a conventional five-electrode AC surface discharge plasma display panel. FIG. 5 is a perspective view illustrating a discharge cell structure of the plasma display panel of the five-electrode AC surface discharge illustrated in FIG. 4. FIG. 2 is a plan view illustrating an electrode structure of the plasma display panel according to the first embodiment of the present invention. 7 is a diagram illustrating a driving unit that supplies a driving waveform to the electrodes illustrated in FIG. FIG. 7 is a waveform diagram illustrating a driving waveform supplied to the electrode illustrated in FIG. 6. FIG. 7 is a cross-sectional view illustrating a sustain discharge generated in the plasma display panel illustrated in FIG. 6. FIG. 7 is a plan view illustrating partitions additionally formed in the plasma display panel illustrated in FIG. 6. FIG. 6 is a plan view illustrating an electrode structure of a plasma display panel according to a second embodiment of the present invention. FIG. 9 is a plan view illustrating an electrode structure of a plasma display panel according to a third embodiment of the present invention. FIG. 13 is a plan view illustrating partitions additionally formed in the plasma display panel illustrated in FIG. 12. FIG. 13 is a plan view illustrating a driving device of the plasma display panel illustrated in FIG. 12. 13 is a cross-sectional view illustrating a sustain discharge generated in the plasma display panel shown in FIG. FIG. 9 is a plan view illustrating an electrode structure of a plasma display panel according to a fourth embodiment of the present invention. FIG. 11 is a plan view illustrating an electrode structure of a plasma display panel according to a fifth embodiment of the present invention. FIG. 18 is a cross-sectional view illustrating a structure in which an AC surface discharge plasma display panel according to an embodiment of the present invention illustrated in FIG.

Explanation of reference numerals

  10, 30 ... upper panel, 12Y, 32Y, 66Y ... first scanning / sustaining electrode, 12Z, 32Z, 66Z ... second scanning / sustaining electrode, 12Z ... common sustaining electrode, 13YB, 13YZ ... bus electrode, 14, 22 ... Dielectric layer, 16: protective film, 18, 40: lower panel, 20X, 42X: address electrode, 24, 36, 38, 74: partition wall, 26: phosphor, 28, 30, 50: discharge cell, 32, 40 , 54, 60: scanning / sustaining drive unit, 34, 42, 56, 62: common sustaining drive unit, 34Y, 34Z, 64Y, 64Z: trigger electrode, 58: second partition, 68, 69, 80, 82: floating electrode.

Claims (3)

  A pair of sustain electrodes formed on both sides of the upper panel; first and second trigger electrodes formed between the pair of sustain electrodes and side by side with the pair of sustain electrodes; A dielectric layer applied to the front surface of the upper panel so as to cover the trigger electrode; and at least one or more floating electrodes formed on the back surface of the dielectric layer alongside the sustain electrodes. Characteristic plasma display panel.   2. The plasma display panel according to claim 1, wherein the floating electrode is located below the sustain electrode pair.   2. The plasma display panel according to claim 1, wherein the floating electrode has a width smaller than a width on the sustain electrode.

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