KR100536243B1 - Plasma display panel and driving method thereof - Google Patents

Abstract

According to an embodiment of the present invention, a plasma display panel includes: a first substrate and a second substrate facing each other; Address electrodes formed on the first substrate in parallel with one direction; A first partition member disposed in a direction parallel to the address electrode in a space between the first substrate and the second substrate, a second partition member disposed in a direction crossing the address electrode, and the pair of second partition walls A third partition member disposed between the members adjacent to the first substrate and formed to be parallel to the second partition member, and a fourth partition wall formed adjacent to the second substrate in a shape corresponding to the third partition member; A partition wall including a member to partition a plurality of discharge cells; A phosphor layer formed in each of the discharge cells; First and second electrodes between the first substrate and the second substrate, the first electrode and the second electrode being formed to extend in parallel with the second partition members constituting the discharge cells; And third electrodes disposed between the first electrode and the second electrode and formed to pass through the discharge cell inner space across the first partition member.

Description

Plasma display panel and its driving method {PLASMA DISPLAY PANEL AND DRIVING METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel and a driving method thereof, and more particularly, to a plasma display panel having an electrode structure advantageous for realizing a high density, high luminance display, and a driving method thereof.

In general, a plasma display panel (hereinafter referred to as a 'PDP') is used to implement an image using visible light generated by a vacuum ultraviolet ray (VUV) emitted from a plasma obtained through gas discharge. Display element. Such a PDP can realize an ultra-large screen of 60 inches or more with a thickness of only 10 cm or less, and is a self-luminous display device such as a CRT. In addition, the manufacturing method is simpler than LCD, and thus has advantages in terms of productivity and cost.

The structure of the PDP has been developed for a long time since the 1970s, and the structure generally known is a three-electrode surface discharge type structure. The three-electrode surface discharge type structure consists of one substrate including two electrodes located on the same surface and another substrate including address electrodes vertically spaced apart from each other at a predetermined distance therebetween, with a discharge gas enclosed therebetween. Structure. In general, the presence or absence of the discharge is determined by the discharge of the address electrode facing the scan electrode independently connected to each line, and the sustain discharge indicating the luminance is performed by two electrode groups located on the same plane. .

PDP uses a glow discharge to make visible light visible to humans, which takes several steps to reach the human eye after the glow discharge occurs. That is, when a glow discharge occurs, an excited gas is generated by collision between electrons and gases, and ultraviolet rays are generated from the excited gas. Ultraviolet rays collide with the phosphor in the discharge cell to generate visible light, and the visible light passes through the transparent substrate on the front surface and reaches the human eye. This step results in a significant loss of input power.

Glow discharges are usually obtained by applying a voltage above the discharge start voltage between two electrodes under a low atmospheric pressure (<1 atm). The discharge start voltage is a function of the type of gas, the atmospheric pressure, and the distance between electrodes. In the case of AC discharge, in addition to these three, the discharge start voltage is also affected by the dielectric capacitance (dielectric constant, electrode area, dielectric thickness) and the frequency of the applied voltage.

Although a very high voltage is required to initiate the discharge, the voltage distribution between the cathode and the anode is distorted as shown in FIG. 1 due to the difference in the space charge generated around the cathode and the anode once the discharge occurs. FIG. 1 shows that most of the voltage is being consumed around two electrodes, that is, in areas called cathode sheath and anode sheath, and in the relatively positive column region. It can be seen that the amount of voltage is small. In particular, the glow discharge generated in the PDP is known that the voltage consumed in the cathode sheath is much higher than the voltage of the anode sheath.

The emission of visible light in the phosphor is caused by the collision of the ultraviolet light with the phosphor, and the ultraviolet light is generated when the energy level is changed from the excited state of Xen to the ground state of Xen. . On the other hand, xenon Xe in an excited state is made by collision between Xen in stable state and electrons. Therefore, in order to increase the ratio of generating visible light among the input energy, that is, the luminous efficiency, the electron heating efficiency must be increased.

In general, since the electron heating efficiency in the positive column region is higher than the electron heating efficiency in the cathode sheath region, the improvement of the PDP luminous efficiency is possible by increasing the positive column region. Since the sheath region has almost the same thickness under the same pressure, it is necessary to increase the length of the discharge in order to increase the luminous efficiency.

In the case of a PDP having a three-electrode structure, discharge is initiated in the region closest to the two electrodes-at the center of the discharge cell-and the discharge then moves to the edge region of the electrode. The discharge occurs in the center region because the discharge start voltage in this region is low. In general, the discharge start voltage is a function of the product of the pressure and the distance between the electrodes, and the PDP operating region is located to the right of the minimum value of the Paschen curve. Once the discharge is initiated, the discharge is maintained under a voltage much lower than the discharge start voltage due to the formation of space charge, and the voltage between the two electrodes gradually decreases with time. After the start of the discharge, the intensity of the electric field is weakened as ions and electrons accumulate in the central region, and the discharge disappears in this region.

Cathode and anode spots move over time in areas free of surface charge, ie around the electrode edges. At this time, since the voltage applied between the two electrodes decreases with time, strong discharge occurs in the center region of the discharge cell (low light emitting efficiency), and weak discharge occurs near the edge of the discharge cell (high light emitting efficiency). . Based on the same principle, the conventional three-electrode surface discharge structure has a low ratio used for heating electrons among the input energy, resulting in low luminous efficiency.

In order to overcome the weakness of the three-electrode structure, a method of increasing the distance between the display electrodes may be considered, but this causes an increase in the discharge start voltage.

The present invention has been made to solve the above problems, and its object is to place the electrodes involved in the sustain discharge and the address discharge in the discharge cell interior space to induce the sustain discharge and the address discharge to the opposite discharge and discharge start voltage. It is to provide a plasma display panel and a driving method thereof that can lower the.

Another object of the present invention is to provide a plasma display panel and a method of driving the same, which can secure a longer discharge path by forming electrodes in the partition wall that are involved in sustain discharge.

In order to achieve the above object, a plasma display panel according to an exemplary embodiment of the present invention includes: a first substrate and a second substrate facing each other; Address electrodes formed on the first substrate in parallel with one direction; A first partition member disposed in a direction parallel to the address electrode in a space between the first substrate and the second substrate, a second partition member disposed in a direction crossing the address electrode, and the pair of second partition walls A third partition member disposed between the members adjacent to the first substrate and formed to be parallel to the second partition member, and a fourth partition wall formed adjacent to the second substrate in a shape corresponding to the third partition member; A partition wall including a member to partition a plurality of discharge cells; A phosphor layer formed in each of the discharge cells; First and second electrodes between the first substrate and the second substrate, the first electrode and the second electrode being formed to extend in parallel with the second partition members constituting the discharge cells; And third electrodes disposed between the first electrode and the second electrode and formed to pass through the discharge cell inner space across the first partition member.

Each of the first electrode, the second electrode, and the third electrode has an outer surface surrounded by a dielectric layer, and includes a cross section perpendicular to the longitudinal direction of the first electrode and the second electrode, and the second partition member corresponding to each of them. It is preferable that the cross section perpendicular to the longitudinal direction have substantially the same axis of symmetry. The third electrodes may be formed to penetrate the first partition member.

It is preferable that the first electrode, the second electrode, and the third electrodes have a longer cross section cut in a plane perpendicular to the longitudinal direction in a direction perpendicular to the substrate than a length in a direction parallel to the substrate. .

The third electrode is positioned between the third partition member and the fourth partition member.

The first electrode and the second electrode may be formed to alternately correspond to each of the second partition member, and as another example, the first electrode and the second electrode may be formed to correspond to a pair of each of the second partition member. have.

The first barrier member and the second barrier member are formed to protrude toward the second substrate surface adjacent to the first substrate, and are adjacent to the second substrate in a shape corresponding to the first barrier member. The fifth partition wall member protrudes toward the substrate surface, and the fifth partition wall member protrudes toward the first substrate surface adjacent to the second substrate in a shape corresponding to the second partition wall member. The fourth partition member may be formed between the third electrode and the second substrate, and the fourth partition member is adjacent to the second substrate to intersect the fifth partition member between the sixth partition members. Is formed. A phosphor layer may be formed in each region of the second substrate partitioned by the fourth partition member, the fifth partition member, and the sixth partition member.

In this case, the third electrode is positioned between the third partition member and the fourth partition member, and the first electrode and the second electrode are positioned between the second partition member and the sixth partition member. .

The driving method of the plasma display panel according to another aspect of the present invention

First and second substrates disposed to face each other, address electrodes formed side by side in one direction on the first substrate, and formed side by side in a direction crossing the address electrodes between the first substrate and the second substrate In the method of driving a plasma display panel comprising a first electrode and a second electrode,

The plasma display panel may include a first partition member disposed in a direction parallel to the address electrode in a space between the first substrate and the second substrate, a second partition member disposed in a direction crossing the address electrode, and A third partition member disposed between the pair of second partition members adjacent to the first substrate and formed to be parallel to the second partition member, and adjacent to the second substrate in a shape corresponding to the third partition member; A partition wall partitioning a plurality of discharge cells, including a fourth partition wall member; And third electrodes disposed between the first electrode and the second electrode and formed to pass through the discharge cell internal space across the first partition member.

In the method of driving the plasma display panel, (a) in the address period, the first voltage and the second electrodes are respectively biased with a first voltage and a second voltage lower than the first voltage. Sequentially applying a third voltage lower than the first voltage to the electrodes; And (b) sequentially applying the third voltage to the third electrodes while biasing the second voltage and the first voltage to the first and second electrodes, respectively, in an address period. Steps.

Here, in the step (a), while the third voltage is applied, a fourth voltage higher than the third voltage is applied to the address electrodes so that the regions formed by the first electrodes and the third electrodes are formed. Selecting a cell, while applying the fourth voltage to the address electrodes while the third voltage is applied in the step (b) to the cell of the region formed by the second electrode and the third electrode Choose.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

2 is a partially exploded perspective view showing a PDP according to an embodiment of the present invention, Figure 3 is a partial cross-sectional view taken along the line A-A combining the PDP shown in FIG.

As shown, the PDP according to the present embodiment basically has a predetermined interval between the first substrate 10 (hereinafter referred to as the 'back substrate') and the second substrate 20 (hereinafter referred to as the 'front substrate'). They are disposed to face each other, and a plurality of discharge cells 18 are partitioned by the partitions 16 and 26 in the space between the substrates 10 and 20. In the discharge cell 18, phosphor layers 19 and 29, which absorb ultraviolet rays and emit visible light, are formed along the partition walls and the bottom surface, and discharge gases (for example, xenon and neon) to cause plasma discharge. (Mixed gas containing Ne) and the like.

Address electrodes 12 are formed along one direction (y-axis direction of the drawing) on the opposite surface of the front substrate 20 of the rear substrate 10, and cover the entire address surfaces of the rear substrate 10 while covering the address electrodes 12. A dielectric layer 14 is formed in the. The address electrodes 12 are formed in parallel with each other while maintaining a predetermined distance from neighboring ones.

The partition wall includes a rear plate partition wall 16 formed to protrude toward the front substrate 20 adjacent to the rear substrate 10, and a front plate protruded toward the rear substrate 10 adjacent to the front substrate 20. The partition 26 is made.

The back plate partition 16 is formed over the dielectric layer 14 formed on the back substrate 10. In the present embodiment, the back plate partition 16 is arranged in a direction parallel to the address electrode 12. 16a, a second partition wall member 16b formed to intersect the first partition wall member 16a and partitioning each discharge cell 18 into an independent discharge space, and a pair of second partition wall members 16b. And a third partition member 16c disposed adjacent to the rear substrate 10 between the rear substrate 10 and parallel to the second partition member 16b.

The front plate partition 26 has a shape corresponding to the third partition member 16b and corresponds to the fourth partition member 26a formed adjacent to the front substrate 20 and the first partition member 16a. A fifth partition member 26b having a shape and a sixth partition member 26c having a shape corresponding to the second partition member 16b. Therefore, the fifth partition member 26b and the sixth partition member 26c are formed in the direction crossing each other, and the region 28 corresponding to each discharge cell 18 is formed on the front substrate 20. In addition, the fourth partition member 26a is formed to intersect the fifth partition member 26b between the sixth partition member 26c and divides the region 28 into two regions 28a and 28b.

Meanwhile, between the rear substrate 10 and the front substrate 20, corresponding to the second partition members 16b constituting each discharge cell 18 along the parallel direction (x-axis direction in the drawing). The first electrode 31A and the second electrode 31B are formed to extend in length. In the present embodiment, since the first electrode 31A and the second electrode 31B alternately correspond to each of the second partition members 16b one by one and are disposed to pass over the second partition members 16b, the address It may be a reference for distinguishing neighboring discharge cells 18 in a direction parallel to the electrode 12 (y-axis direction of the drawing).

In addition, third electrodes 33 are disposed between the first electrodes 31A and the second electrodes 31B, which are adjacent to each other. The third electrodes 33 are formed to pass through the inside of the discharge cell 18 across the first partition member 16a.

At this time, the third electrode 33 serves to select the discharge cells 18 to be turned on by participating in the discharge of the address section together with the address electrode 12, and the first electrode 31A and the second electrode 31B. ) Serves to display the screen by participating in the discharge of the holding section together with the third electrode 33. However, since the electrodes may have different roles depending on the signal voltage applied thereto, the present invention does not need to be limited to the above.

Referring to FIG. 3, in this embodiment, a cross section perpendicular to the longitudinal direction of the first electrodes 31A and the second electrodes 31B and the longitudinal direction of the second partition member 16b corresponding to the cross sections perpendicular to the longitudinal directions (x in the figure) are illustrated. The cross section perpendicular to the axial direction has substantially the same axis of symmetry L. In this way, the first electrode 31A or the second electrode 31B can participate in both of the pair of discharge cells 18 adjacent to each other in the direction parallel to the address electrode 12.

In addition, in the present embodiment, the first electrode 31A and the second electrode 31B have a cross section cut in a plane perpendicular to the longitudinal direction than the length w1 in a direction parallel to the surfaces of the substrates 10 and 20. 20 may have a longer length h1 in the direction perpendicular to the plane, and the third electrode 33 may also have a cross section cut in a plane perpendicular to the length direction in a direction parallel to the substrate plane. The length h2 in the direction perpendicular to the substrate surface may be longer than that of w2). Therefore, the opposite discharge can be induced more easily between the electrodes 31A, 31B, and 33, thereby obtaining a high luminous efficiency.

On the other hand, each of the first electrode 31A, the second electrode 31B, and the third electrode 33 has an outer surface surrounded by dielectric layers 34 and 35. These first, second, and third electrodes 31A, 31B, and 33 may be manufactured by TFCS (Thick Film Ceramic Sheet) method. That is, the electrode unit including the first electrode 31A, the second electrode 31B, and the third electrode 33 may be separately manufactured and then coupled to the back substrate 10 having the partition wall 16 formed thereon. have. At this time, the electrode is coated with a ceramic (ceramic).

The MgO passivation layer 36 may be formed on the surfaces of the dielectric layers 34 and 35 covering the first electrode 31A, the second electrode 31B, and the third electrode 33. In particular, the MgO passivation layer 36 may be formed in a portion exposed to the plasma discharge occurring in the discharge space inside the discharge cell 18. In the present embodiment, the first electrode 31A, the second electrode 31b, and the third electrode 33 are not formed on the front substrate 20, and thus are applied to the dielectric layers 34 and 35 covering these electrodes. The MgO protective film 36 may use MgO having visible light impermeability. Visible light-transmissive MgO has a much higher secondary electron emission coefficient value than visible light-transmissive MgO, thus further lowering the discharge start voltage.

In the present exemplary embodiment, the third electrode 33 has the rear substrate 10 larger than the thickness δl of the dielectric layer formed on the surface of the third electrode 33 facing the first electrode 31A or the second electrode 31b. The thickness δ h of the dielectric layer formed on the facing surface is formed thicker. In this way, address discharge is prevented from occurring on the undersides of the address electrode 12 and the third electrode 33 and induced to occur on the side of the address electrode 12 and the third electrode 33.

As such, the first electrode 31A or the second electrode 31B having the dielectric layer 34 and the MgO protective layer 36 may be formed between the second partition member 16b and the sixth partition member 26c. It is located alongside (16b, 26c). However, the third electrode 33 having the dielectric layer 35 and the MgO protective film 36 is positioned in parallel with these partition members 16c and 26a between the third partition member 16c and the fourth partition member 26a. do.

In particular, a groove is formed in a part of the first partition member 16a to form the third electrode 33, and the third electrode 33 having the dielectric layer 35 and the MgO protective layer 36 coated thereon is inserted into the groove. Can be produced. In this case, the third electrode 33 and the first electrode 31A (or the second electrode 31B) may have the same distance measured from the back substrate 10, and the third electrode ( The top surface of the dielectric layer 35 surrounding 33 may be formed to substantially coincide with the top surface of the first partition member 16a. The third electrode 33 may be formed to penetrate the first partition member 16a.

The first electrode 31A and the second electrode 31B are preferably made of a metal electrode, and the third electrode 33 may also be made of a metal electrode.

Meanwhile, each area 28a of the front substrate 20 partitioned by the fourth partition member 26a, the fifth partition member 26b, and the sixth partition member 26c formed adjacent to the front substrate 20 is formed. The phosphor layer 29 may be formed in 28b). The phosphor layer 29 may apply a dielectric layer on the front substrate 20, form a front plate partition 26, and then apply a phosphor layer 29 on the dielectric layer, and selectively apply the dielectric layer to the front substrate 20. ), The front plate partition wall 26 may be formed on the front substrate 20 and the phosphor layer may be applied. Furthermore, the front substrate 20 may be etched to match the shape of the discharge cell 18 and then a phosphor layer may be coated thereon. At this time, the front plate partition 26 is made of the same material as the front substrate 20.

In the above case, the phosphor layer 29 formed on the front substrate is used to generate visible light by absorbing vacuum ultraviolet rays (VUV) directed toward the front substrate 20 after discharge is generated in the discharge cell 18. The phosphor layer 29 needs to be able to transmit visible light. For this purpose, the phosphor layer 29 may be formed on the front substrate 20 to have a thickness thinner than that of the phosphor layer 19 formed on the rear substrate 10. have. In this way, the luminous efficiency can be improved by minimizing the loss of vacuum ultraviolet rays.

4 is a partial plan view schematically illustrating an electrode and a discharge cell structure of a PDP according to a first embodiment of the present invention.

Referring to FIG. 4, each of the discharge cells 18 is divided into two regions 18a and 18b by the third electrode 33 and the third partition member 16c, and each of the regions (eg, the discharge holding section) is divided into two regions 18a and 18b. In 18a and 18b, sustain discharge occurs between the first electrode 31A and the third electrode 33 or between the second electrode 31B and the third electrode 33. That is, since the discharge is generated between the third electrode 33 crossing the discharge cell 18 and the first electrode 31A and the second electrode 31B disposed on both sides, the electrodes involved in the discharge holding are discharged. The discharge gap between the two electrodes which causes the discharge is reduced by almost half than that adjacent to the cell edges, respectively, so that it can be driven even with a low discharge start voltage.

In the PDP according to the present embodiment, the first electrodes 31A are short-circuited to one electrode X1 in the terminal area, and a common signal voltage is applied, and the second electrodes 31B are separated from the first electrodes 31A. The signal X is shorted to the electrode X2, and a common signal voltage is applied.

Referring to FIG. 5, the structures of the barrier ribs, the dielectric layer, and the phosphor layer of the PDP according to the present embodiment are the same as those of the PDP according to the first embodiment. Also in the present embodiment, the first electrode 32A and the second electrode 32B are the second partition members 16b constituting each discharge cell 18 between the rear substrate 10 and the front substrate 20. Corresponding to the shape is formed long along the parallel direction (x-axis direction of the drawing). However, since the pair of the first electrode 32A and the second electrode 32B correspond to each of the second partition wall members 16b so as to pass over the second partition wall members 16b, each discharge cell 18 They do not share a common electrode with neighboring discharge cells 18 and are provided with a pair of first electrode 32A and second electrode 32B, respectively. The first electrode 32A and the second electrode 32B disposed adjacent to each second partition member 16b are separated by a predetermined distance with the dielectric layer 34 'interposed therebetween.

In addition, third electrodes 33 are disposed between the first electrodes 32A and the second electrodes 32B that are adjacent to each other with the discharge cells 18 therebetween. The third electrodes 33 are formed to pass through the inside of the discharge cell 18 across the first partition member 16a.

At this time, the third electrode 33 serves to select the discharge cells 18 to be turned on by participating in the discharge of the address section together with the address electrode 12, and the first electrode 32A and the second electrode 32B. ) Serves to display the screen by participating in the discharge of the holding section together with the third electrode 33. However, since the electrodes may have different roles depending on the signal voltage applied thereto, the present invention does not need to be limited to the above.

6 is a partial plan view schematically illustrating an electrode and a discharge cell structure of a PDP according to a second embodiment of the present invention.

Referring to FIG. 6, each of the discharge cells 18 is divided into two regions 18a and 18b by the third electrode 33 and the third partition member 16c, and the respective discharge regions 18 are divided into two regions 18a and 18b. In 18a and 18b, sustain discharge occurs between the first electrode 32A and the third electrode 33 or between the second electrode 32B and the third electrode 33. That is, since the discharge is generated between the third electrode 33 crossing the discharge cell 18 and the first electrode 32A and the second electrode 32B disposed on both sides, the electrodes involved in the discharge holding are discharged. The discharge gap between the two electrodes which causes the discharge is reduced by almost half than that adjacent to the cell edges, respectively, so that it can be driven even with a low discharge start voltage.

In the PDP according to the present exemplary embodiment, the first electrodes 32A are short-circuited to one electrode X1 in the terminal area to apply a common signal voltage, and the second electrodes 32B are separated from the first electrodes 32A. The signal X is shorted to the electrode X2, and a common signal voltage is applied.

Hereinafter, a method of driving the plasma display panel described with reference to FIGS. 5 and 6 will be described. In particular, when each discharge cell 18 is divided into two regions by the third electrode, a method of selecting the two regions in the address period will be described.

FIG. 7 is a driving waveform diagram of a plasma display panel according to a first embodiment of the present invention, and FIG. 8 conceptually illustrates a driving method according to the first embodiment.

As shown in FIG. 7, each subfield of the driving method according to the first embodiment of the present invention includes a reset section, an address section, and a discharge sustain section. In particular, the driving method according to the embodiment of the present invention selects a region 18b formed by the first electrode X1 when each discharge cell 18 is divided into two regions on the third electrode. It consists of the section II which selects the area | region 18a formed by (I) and the 2nd electrode X2.

First, in the reset period, a slowly rising voltage and a gently falling voltage are applied to all the third electrodes Y. In this way, the reset period erases the wall charge state of the previous sustain discharge and serves to set up the wall charge in order to stably perform the next address discharge. Here, the voltage for generating a weak discharge from the first electrodes (X1) and the second electrodes (X2) to the third electrode (Y) while applying a ramp voltage gently falling to the third electrode (Y) (Ve) is biased.

Next, the address section of the driving method according to the embodiment of the present invention is divided into a first section I and a second section II.

The scan pulse voltage Vsc is sequentially applied to the third electrode Y1..Yn while biasing the first electrodes X1 that are commonly bundled in the first period I of the address period with the voltage Ve. The ground voltage 0V is applied to the second electrodes X2 without biasing the voltage Ve. At this time, the address voltage Va is applied to the address electrode A of the cell to be selected. Referring to FIG. 8, only cells of the region 18b formed by the first electrodes X1 and the third electrode Y are addressed (selected) in the first period I of the address period. That is, since the voltage Ve is applied only to the first electrodes X1, only the discharge cells formed by the first electrodes X1 and the third electrodes Y are addressed by the address discharge. The voltage Ve originally applied to the first electrode or the second electrode serves to generate a discharge between the first electrode or the second electrode and the third electrode Y at an initial stage during the address discharge, and thereafter, at the address discharge. Since the negative wall charge generated is pulled to the first electrode or the second electrode, when only the first electrodes X1 are biased to the voltage Ve like the first section I of the address section. Only cells adjacent to the first electrodes X1 are addressed. Therefore, as shown in FIG. 8, only the electrode lines 1, 3, 5, 7, and 9 of the cells adjacent to the first electrodes X1 are addressed in the first section I. FIG.

 In the second section II of the address section, the scan pulse voltage Vsc is sequentially applied to the third electrode Y1..Yn while biasing only the second electrodes X2 that are commonly tied together with the voltage Ve. The ground voltage 0V is applied to the first electrodes X1 without biasing the voltage Ve. At this time, the address voltage Va is applied to the address electrode A of the cell to be selected. Referring to FIG. 8, in the second section II of the address section, only cells of the region 18a formed by the second electrodes X2 and the third electrodes Y1... Yn are addressed (selected). )do. That is, since the voltage Ve is applied only to the second electrodes X2, only the discharge cells 2, 4, 6, and 8 even lines adjacent to the second electrodes X2 are addressed to generate an address discharge. .

By the first and second sections I and II of the address section, when each discharge cell 18 is divided into two areas, all areas are selected in the address section.

On the other hand, in the discharge sustain period after the address period, the sustain discharge voltage Vs is alternately applied to the third electrode Y and the first and second electrodes X1 and X2, so that an image is actually displayed on the cells addressed in the address period. Is displayed. In this case, since the sustain discharge occurs even when the same voltage (Vs or 0V) is applied to the first electrodes (X1) and the second electrode (X2) in the discharge organic period, the same voltage (Vs or 0V) is simultaneously applied.

9 is a driving waveform diagram of a plasma display panel according to a second embodiment of the present invention, and FIG. 10 is a view conceptually illustrating a driving method according to the second embodiment.

9 and 10, the driving waveform diagram according to the second embodiment of the present invention is almost similar to the driving method of the first embodiment of the present invention, but the first electrode (I) in the first section I of the address section After selecting the cells adjacent to X1) (the cells of the odd lines), the discharge sustaining section I is located and the cells adjacent to the second electrodes X2 (the cells of the even lines) are located in the second section II of the address section. After selection, the discharge maintenance section II is located. That is, unlike the first embodiment, the driving method of the second embodiment is divided into two sections I and II.

In the first section I of the address section, as in the first embodiment, in the state in which only the first electrodes X1 are biased with the voltage Ve, the first electrodes Y1, Y2, ... Yn are sequentially ) Applies a scan pulse voltage (Vsc). Then, only the cells of the region 18b formed by the first electrodes X1 and the third electrode Y are addressed. Next, the first section I of the discharge sustaining section is positioned to alternately apply the sustain discharge pulse voltage Vs to the third electrode Y and the first electrodes X1, thereby providing the first electrode X1. Only cells adjacent to the field (that is, the cells selected in the address section I) are sustained and discharged. Here, the sustain discharge pulse voltage Vs may be applied to the second electrodes X2 in the first section I of the discharge sustain section, for example, but the reason is not selected in the first section I of the address section. Therefore, no discharge occurs even when the sustain discharge pulse voltage Vs is applied.

Next, in the second section II of the address section, the second electrodes X2 are sequentially scanned (Y1, Y2,... Yn) while the second electrodes X2 are biased with the voltage Ve. The pulse voltage Vsc is applied. Then, only the cells of the region 18a formed by the second electrodes X2 and the third electrode Y are addressed. Next, the second section II of the discharge sustaining section is positioned to alternately apply the sustain discharge pulse voltage Vs to the third electrode Y and the second electrode X2, and thus, the second electrode X2. Only cells adjacent to the field (the cells selected in the address section II) are sustained and discharged.

Here, the number of sustain discharge pulses applied to the first section I and the second section II of the discharge sustaining section is the same as the number assigned by the weight of the subfield. In addition, the first electrode X1 is not applied to the second electrodes X2 in the first section I of the discharge maintenance section at 9 and the first electrode X1 is in the second section II of the discharge organic section. The sustain discharge pulse voltage Vs has not been applied to them, but the sustain discharge pulse voltage Vs may be applied. Because only the cells adjacent to the X1 electrodes X1 are selected in the first section I of the address section, the sustain discharge does not occur even when the sustain discharge pulse voltage Vs is applied to the second electrodes X2. Because.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications or changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It goes without saying that it belongs to the scope of the present invention.

As described above, according to the plasma display panel according to the present invention, two electrodes causing a discharge are caused by allowing electrodes commonly associated with an address discharge and a sustain discharge to penetrate the inner space of the discharge cell, and disposing the electrodes involved in the sustain discharge together. The discharge gap between the electrodes is reduced, and thus driving can be performed even at a low discharge start voltage.

In addition, since the dielectric layer and the transparent electrode do not need to be formed on the front substrate, the manufacturing cost of the PDP can be reduced and the visible light transmittance can be increased.

In addition, by using a visible light impermeable MgO having a much higher secondary electron emission coefficient as a protective film than a visible light transmissive MgO, the discharge initiation voltage can be further lowered, and a fluorescent material is formed on the front substrate to minimize the loss of vacuum ultraviolet rays and thus the luminous efficiency. Can increase.

1 is a graph schematically showing a voltage distribution between a cathode and an anode in a typical glow discharge.

2 is a partially exploded perspective view showing a PDP according to a first embodiment of the present invention.

3 is a partial cross-sectional view taken along the line A-A by combining the PDP shown in FIG.

4 is a partial plan view schematically illustrating the structure of an electrode and a discharge cell in a PDP according to a first embodiment of the present invention.

5 is a partial cross-sectional view of a PDP according to a second embodiment of the present invention.

6 is a partial plan view schematically illustrating a structure of an electrode and a discharge cell in a PDP according to a second embodiment of the present invention.

7 is a driving waveform diagram of a plasma display panel according to a first embodiment of the present invention.

8 is a view conceptually illustrating a driving method according to the first embodiment.

9 is a driving waveform diagram of a plasma display panel according to a second embodiment of the present invention.

10 is a view conceptually illustrating a driving method according to a second embodiment.

Claims (18)

A first substrate and a second substrate disposed to face each other; Address electrodes formed on the first substrate in parallel with one direction; A first partition member disposed in a direction parallel to the address electrode in a space between the first substrate and the second substrate, a second partition member disposed in a direction crossing the address electrode, and the pair of second partition walls A third partition member disposed between the members adjacent to the first substrate and formed to be parallel to the second partition member, and a fourth partition wall formed adjacent to the second substrate in a shape corresponding to the third partition member; A partition wall including a member to partition a plurality of discharge cells; Phosphor layers formed in the discharge cells; First and second electrodes between the first substrate and the second substrate, the first electrode and the second electrode being formed to extend in parallel with the second partition members constituting the discharge cells; And Third electrodes disposed between the first electrode and the second electrode and formed to pass through the discharge cell inner space across the first partition member. Plasma display panel comprising a. The method of claim 1, Each of the first electrode, the second electrode, and the third electrode has an outer surface surrounded by a dielectric layer. The method of claim 1, And a cross section perpendicular to the longitudinal direction of the first electrode and the second electrodes and a cross section perpendicular to the longitudinal direction of the second partition member corresponding to the first electrode and the second electrode, respectively, having substantially the same symmetry axis. The method of claim 1, And the third electrode is disposed between the third partition member and the fourth partition member. The method of claim 1, And the first electrode and the second electrode are alternately corresponding to each of the second partition member. The method of claim 1, And a pair of the first electrode and the second electrode corresponding to each of the second partition member. The method of claim 1, And the first barrier member and the second barrier member protrude toward the surface of the second substrate adjacent to the first substrate. The method of claim 7, wherein And a fifth partition member protruding toward the first substrate surface adjacent to the second substrate in a shape corresponding to the first partition member. The method of claim 7, wherein And a sixth partition member protruding toward the first substrate surface adjacent to the second substrate in a shape corresponding to the second partition member. The method of claim 9, And the first electrode or the second electrode is positioned between the second partition member and the sixth partition member. The method of claim 7, wherein A fifth partition member protruding toward the first substrate surface adjacent to the second substrate in a shape corresponding to the first partition member; A sixth partition member protruding toward the first substrate surface adjacent to the second substrate in a shape corresponding to the second partition member; And A fourth partition member protruding toward the first substrate surface adjacent to the second substrate so as to intersect between the sixth partition members; Including, And a phosphor layer formed in each region of the second substrate partitioned by the fourth partition member, the fifth partition member, and the sixth partition member. First and second substrates disposed to face each other, address electrodes formed side by side in one direction on the first substrate, and formed side by side in a direction crossing the address electrodes between the first substrate and the second substrate In the method of driving a plasma display panel comprising a first electrode and a second electrode, The plasma display panel, A first partition member disposed in a direction parallel to the address electrode in a space between the first substrate and the second substrate, a second partition member disposed in a direction crossing the address electrode, and the pair of second partition walls A third partition member disposed between the members adjacent to the first substrate and formed to be parallel to the second partition member, and a fourth partition wall formed adjacent to the second substrate in a shape corresponding to the third partition member; A partition wall including a member to partition a plurality of discharge cells; And A third electrode disposed between the first electrode and the second electrode and formed to pass through the discharge cell internal space across the first partition member; The driving method of the plasma display panel is The first voltage is sequentially applied to the third electrodes while biasing a first voltage and a second voltage lower than the first voltage to the first and second electrodes, respectively, in an address period. Applying a lower third voltage; And (b) sequentially applying the third voltage to the third electrodes while biasing the second voltage and the first voltage to the first and second electrodes, respectively, in an address period; Method of driving a plasma display panel comprising a. The method of claim 12, The first electrodes and the second electrodes are formed to correspond to the second partition members constituting the discharge cells and extend in parallel with each other, and the first and second electrodes are formed in the second partition member. Driving Method of Plasma Display Panel Alternating One by One The method according to claim 12 or 13, In the step (a), while the third voltage is applied, a fourth voltage higher than the third voltage is applied to the address electrodes to form a cell in the region formed by the first electrodes and the third electrodes. Selecting a cell in a region formed by the second electrodes and the third electrodes by applying the fourth voltage to the address electrodes while the third voltage is applied in the step (b). Driving method of plasma display panel. The method of claim 14, And after the step (b), applying a voltage for sustain discharge to the third electrodes and the first and second electrodes. The method of claim 14, (c) after step (a), applying a voltage for sustain discharge to the third electrodes and the first electrodes; And and (d) applying a voltage for sustain discharge to the third electrodes and the second electrodes after the step (b). The method according to claim 12 or 13, A common voltage is applied to the first electrodes and a common voltage is also applied to the second electrodes. The method of claim 14, In step (a), the discharge cells of odd lines among the horizontal lines among the discharge cells are selected, and the discharge cells of even lines among the horizontal lines are selected by the step (b). Driving method.