KR100684833B1 - Plasma Display Panel and Driving Method thereof - Google Patents

Abstract

The present invention relates to a plasma display panel, wherein the plasma display panel according to the present invention includes a plurality of discharges in spaces formed between the first substrate and the second substrate facing each other at predetermined intervals and facing each other. A partition wall partitioning into cells, a quasi-barrier partitioning each discharge cell into at least two regions divided along a direction perpendicular to the substrate, and formed in the partition wall to surround at least a portion of each discharge cell, A first electrode extending along the second electrode, a second electrode formed in the partition wall so as to surround at least a part of the discharge cells at a predetermined distance from the first electrode, and extending in a second direction crossing the first direction; It is configured to include a phosphor layer respectively formed in each zone partitioned by the partition wall.

According to this configuration, it is possible to drive cells of three colors of red, green, and blue in the smallest sub-pixels that can be manufactured at present.

Quasi bulkheads, bulkheads, ultra-fine, first electrode, second electrode, surface discharge

Description

Plasma display panel and method for driving the same {Plasma display panel and method for driving the same}

1 is an exploded perspective view showing a part of a plasma display panel according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view along line I-I showing one discharge space of the plasma display panel of FIG. 1;

3 is a schematic diagram illustrating an electrode structure of the plasma display panel of FIG. 1;

4 is a plan view schematically illustrating one discharge space of the plasma display panel of FIG. 1;

5 is a schematic diagram for explaining a connection state of a terminal portion and a circuit portion;

6 is a conceptual diagram of driving waveforms of a plasma display panel having a two-electrode ring structure employing a lamp reset;

7 is a conceptual diagram of voltage between two electrodes of a plasma display panel having a two-electrode ring structure employing lamp reset;

8 is a conceptual diagram of driving waveforms using Vx in a two-electrode ring structure employing a lamp reset;

9 is a conceptual diagram of a state voltage between two electrodes using Vx in a two-electrode ring structure employing a lamp reset.

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 and a driving method thereof having high resolution and ultra-high definition, reducing the cost of a circuit and ensuring reliability of driving operation and discharge characteristics. will be.

In general, a plasma display panel (hereinafter referred to as a 'PDP') is a display device for realizing an image by exciting phosphors by vacuum ultraviolet rays caused by gas discharge occurring in a discharge cell. It is attracting attention as a thin display.

The general AC PDP has a three-electrode surface discharge structure. That is, the PDP includes an address electrode on the rear substrate so as to correspond to the discharge cells partitioned by the partition wall, and includes a fluorescent layer emitting red, green, or blue light in the discharge cells, and the front substrate on the opposite side of the rear substrate. The front substrate is provided with a scan electrode and a sustain electrode, and is formed by filling a discharge gas (mainly a mixed gas such as neon (Ne) and xenon (Xe)) for gas discharge in the discharge cell.

The PDP applies an address pulse to the address electrode and applies a scan pulse to the scan electrode to cause an address discharge in a discharge cell where the scan electrode and the address electrode intersect, and are formed around the scan electrode and the address electrode due to the address discharge. A discharge cell is formed to generate light by forming and accumulating wall charges in the dielectric layer. Then, ions accumulated in the dielectric layer on the scan electrode side by applying a discharge sustain voltage to the scan electrode and the sustain electrode of the selected discharge cell. And electrons accumulated in the dielectric layer on the sustain electrode side cause plasma discharge, that is, sustain discharge. The vacuum ultraviolet rays are emitted from the excitation atoms of Xe produced by this plasma discharge, and the vacuum ultraviolet rays collide with the fluorescent layer to generate visible light, so that the PDP displays an image.

Since the PDP includes an address electrode on the rear substrate, and a scan electrode and a sustain electrode on the front substrate, separate driving boards are required to control the electrodes, thereby forming a driving board. There is a problem of raising the price and also raising the price of the entire panel.

In addition, such a PDP has red, blue, and green phosphors separately formed between partition walls, so that three subpixels of red, blue, and green must be formed to form one pixel. Considering that the size of the three subpixels is 0.3 mm or more, the size of one pixel becomes at least about 1 mm, so that the resolution is lower than that of the LCD, and there is a problem of inferiority of the fixed tax.

SUMMARY OF THE INVENTION The present invention is to solve various problems of the conventional plasma display panel including the above problem, and the present invention is to provide a plasma display panel having a structure different from the conventional plasma display panel and a driving method thereof. The purpose.

In addition, the present invention has several objects including the following objects.

An object of the present invention is to provide a plasma display panel that can not only obtain three times the resolution compared to the conventional, but also obtain a very high definition.

In addition, another object of the present invention is to provide a plasma display panel which can bring about cost reduction and uniformity of lines, and can obtain high transmittance as compared with the conventional one and improve brightness.

Therefore, the plasma display panel according to the present invention is a zone. A first substrate and a second substrate facing each other at a predetermined interval, a partition wall partitioning a space formed between the first substrate and the second substrate into a plurality of discharge cells, and each discharge cell along a direction perpendicular to the substrate Quasi-barrier partitioned into at least two divided zones, a first electrode formed in the partition to surround at least a portion of each discharge cell, the first electrode extending in a first direction, the discharge cells each predetermined distance away from the first electrode A second electrode formed in the partition wall so as to surround at least a portion of the second electrode and extending in a second direction crossing the first direction, and phosphor layers respectively formed in respective regions partitioned by the quasi-barrier wall; Phosphor layers that emit visible light of different colors may be formed in each region partitioned by the quasi-barrier walls in each discharge cell.

In this case, both the first substrate and the second substrate may be transparent substrates, and a dielectric layer is further formed on the partition wall, and an electrode pair composed of the first electrode and the second electrode is divided into the respective discharge cells. It may be arranged per zone. The quasi-barrier may protrude toward the inside of the discharge cell in a direction parallel to the substrate from the barrier, and phosphor layers of different colors may be formed on both sides of the quasi-barrier to prevent crosstalk.

In the plasma display panel having such a configuration, a sustain pulse may be applied to the first electrode in the sustain period, a scan pulse may be applied to the first electrode in the address period, and an address pulse may be applied to the second electrode.

On the other hand, according to another aspect of the present invention, in the plasma display panel having such a configuration, in the at least one subfield, the voltage of the first electrode to the second voltage while biasing the second electrode to the first voltage in the reset period; Gradually increasing the voltage to a third voltage and then gradually decreasing the voltage from the fourth voltage to the fifth voltage, selecting a discharge cell to be turned on in an address period, and biasing the second electrode to the first voltage. The method may be driven by a driving method including applying a pulse having an sixth voltage and a seventh voltage lower than the sixth voltage to the first electrode to sustain discharge the selected discharge cell. In particular, the first voltage is a ground voltage, a scan pulse of an eighth voltage is applied to a first electrode, an address pulse of a fifth voltage is applied to a second electrode, and the eighth voltage is a fifth voltage in the address period. It may be lower than the voltage.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a partially exploded perspective view of a plasma display panel according to an exemplary embodiment of the present invention, and FIGS. 2 to 4 are partial cross-sectional views illustrating an assembled state of FIG. 1 and a schematic diagram for describing an electrode structure of the plasma display panel of FIG. 1. 1 is a plan view schematically showing one discharge cell in the assembled state of FIG. 1.

1 to 4, the plasma display panel 100 according to an exemplary embodiment of the present invention, as shown in FIG. 1, has a pair of substrates facing each other at a predetermined interval, for example, the front substrate 101. ) And a rear substrate 102.

A side wall, for example, the partition wall 105, which forms a plurality of discharge cells 120, is formed between the front substrate 101 and the rear substrate 102 and includes a closed partition 105 such as a waffle, a matrix, a delta, and the like. In addition, the closed partition wall 105, the cross section of the discharge cell 120, in addition to the quadrangle as in the present embodiment, may be formed in a polygon, such as a triangle, a pentagon, or a circle, oval or the like. The partition wall 105 is not only an element for forming a discharge space, but also an element for providing display electrodes 106 and 107 to be described later. Therefore, the partition wall 105 may be formed in any form as long as the display electrodes 106 and 107 may be installed so that the discharge may be initiated and diffused. By arranging and arranging the partition walls 105 according to various shapes and shapes of the display electrodes, for example, the X electrodes 107 and the Y electrodes 106, discharges can be started and diffused in various discharge spaces formed thereby. Also, in the present exemplary embodiment, a quasi-barrier wall 105a may be formed inside the closed partition wall 105 to divide one discharge cell 120 into at least two or more regions divided along a direction perpendicular to the substrate. have. The quasi-barrier walls 105a protrude from the barrier ribs 105 in a direction parallel to the substrate, and are arranged up and down side by side at regular intervals.

In the present exemplary embodiment, the display electrode is formed in the partition wall 105 so as to surround at least a portion of each of the discharge cells 120 and extends from the X electrode 107 and the X electrode. And a Y electrode 106 formed in the partition wall so as to surround at least a portion of each discharge cell at a predetermined interval and extending in a second direction crossing the first direction. In other words, the X electrode 107 and the Y electrode 106 are disposed up and down with respect to the discharge cells at a predetermined interval so that the discharge due to the voltage difference applied between the two electrodes can be started on the surface connected to each other. The X electrode 107 and the Y electrode 106 are formed in pairs on the reference line CL with the line connecting the quasi-barrier 105a as the reference line CL. In addition, a side dielectric layer 108 is formed on the partition wall 105, and the quasi-barrier wall 105a is formed on the side dielectric layer 108, and at least two fluorescent layers 109 having different colors between the quasi-barrier walls 105a. ), At least two quasi discharge spaces can be formed between the quasi-barrier walls 105a.

In the present embodiment, as shown in Figs. 3 and 4, although the X electrode 107 and the Y electrode 106 forms a square ring shape when one discharge cell 120 is viewed in plan view, the present invention In the case of not necessarily limited to this, it may be a ring shape of various shapes, squares, triangles, pentagons, ovals.

As described above, the X electrode 107 and the Y electrode 106 have a closed structure along the closed partition wall, and a fluorescent layer 109 is applied between the quasi partition walls 105a to form a quasi discharge space, thereby discharging the discharge space 120. ), The discharge electrode or the bus electrode made of the indium tin oxide (ITO) film existing on the front substrate of the conventional plasma display panel, and there is no dielectric layer formed on the front substrate so as to cover them. In addition, the luminous efficiency can be maximized to maximize the light emission efficiency. In addition, when the rear substrate is made of a transparent material such as glass, visible light can be transmitted to both sides of the plasma display panel.

In addition, in an embodiment of the present invention, the ring-shaped quasi-barrier wall 105a surrounding the partition wall is disposed up and down side by side at a predetermined interval in a direction perpendicular to the substrates 101 and 102, thereby providing a plurality of discharge cells. Crosstalk between the discharge spaces can be prevented.

Since the X electrode 107 and the Y electrode 106 in this configuration are not disposed on the front substrate 101 through which visible light is transmitted, but are disposed on the side of the discharge space, it is necessary to use a transparent electrode having a high resistance. Without a low resistance, for example, a highly conductive metal electrode such as Ag can be used.

Further formation of a film made of, for example, MgO, which is a layer protecting the side dielectric layer 108, is preferable because it can prevent the electrode from being degraded by plasma discharge between the direct electrodes.

The discharge cell 120 formed by the side dielectric layer 108, the front substrate 101, and the rear substrate 102 is partitioned into at least three zones 120R, 120G, and 120B by the quasi-barrier 105a. At least two different phosphor layers 109, preferably red, are formed in the zones, respectively, of which phosphor layers of red, green and blue are excited and are excited by ultraviolet rays generated from the discharge gas to emit visible light of different colors. , Green and blue fluorescent layers 109R, 109G, and 109B are alternately formed along a direction perpendicular to the substrates 101 and 102, and the discharge cells 120 formed thereon are Ne, Xe, and the like, and mixed gases thereof. Discharge gas such as is sealed.

In the present invention including this embodiment, the discharge surface can be increased and the discharge region can be enlarged, so that the amount of plasma formed is increased, thereby enabling low voltage driving. Therefore, in the case of the present invention, by using a high concentration of Xe gas as the discharge gas is possible to drive a low voltage it is possible to significantly improve the luminous efficiency. In addition, by forming three quasi-discharge spaces in one discharge cell, the size of one pixel can be reduced, so that not only three times the resolution can be obtained but also an ultra-fine structure can be obtained.

The plasma display panel of the embodiments described above and the plasma display panel of one aspect of the present invention may be employed in a flat panel display device such as a plasma display device according to an aspect of the present invention together with a driving circuit or the like.

Hereinafter, a driving method for driving the plasma display panel described above will be described.

5 is a schematic diagram illustrating a connection state between a terminal portion and a circuit portion of the plasma display panel according to the present invention, FIG. 6 is a conceptual diagram of a driving waveform of a plasma display panel having a two-electrode ring structure employing a lamp reset, and FIG. It is a conceptual diagram of the voltage between two electrodes of a plasma display panel of a two-electrode ring structure employing a reset.

First, referring to FIG. 5, the X electrode and the Y electrode are formed in a ring shape in the plasma display panel 100, and the plurality of first electrodes X1 to Xn and the terminal portion of which the terminal portion extends in the vertical direction and the terminal portion cross each other. The plurality of second electrodes Y1 to Yn extending in the horizontal direction are included in a multi-layer, for example, three-layer structure. The first electrodes X1 to Xn and the second electrodes Y1 to Yn are disposed in the direction in which the terminal portions cross each other in the space between the front substrate 101 and the rear substrate 102, and each zone generates direct discharge. It is arranged in a structure facing each other within (120R, 120G, 120B).

 The terminal portions of the first electrodes X1 to Xn and the second electrodes Y1 to Yn of the first zone 120R, which represent red R, are connected to the circuit portion 10R corresponding to the red signal, and the green ( The terminal portions of the first electrodes X1 to Xn and the second electrodes Y1 to Yn of the second zone 120G representing G) are connected to the circuit portion 10G corresponding to the green signal and represent blue (B). The first electrodes X1 to Xn and the second electrodes Y1 to Yn of the third zone 120B are connected to the circuit unit 10B corresponding to the blue signal, so that each discharge cell 120 has three subpixels. For example, each subpixel is divided into three subframes each having a time of 1/180 and discharged sequentially for one frame having a time of 60 / second, and is discharged sequentially. The first zone 120R of R) and the second zone 120G of green (G) can be discharge driven at the same time to display an image.

Hereinafter, the driving waveforms applied to the first electrode (hereinafter referred to as the X electrode) and the second electrode (hereinafter referred to as the Y electrode) forming one zone 120R will be described for convenience. In the driving waveform of FIG. 6, the voltage applied to the X electrode is supplied from the X electrode driving board (not shown) and the X electrode buffer board (not shown), and the voltage applied to the Y electrode is supplied from the address buffer board (not shown). Supplied. Unlike the above, the first electrode may be used as the Y electrode, and the second electrode may be used as the X electrode.

6, one subfield includes a reset period, an address period, and a sustain period, and the reset period includes a rising period and a falling period.

In the rising period of the reset period, the voltage of the Y electrode is gradually increased from the Vs voltage to the Vset voltage while the X electrode is maintained at the reference voltage (0 V in FIG. 5). In FIG. 6, the voltage of the Y electrode is shown to increase in the form of a lamp. A weak discharge (hereinafter referred to as a weak discharge) occurs between the X electrode and the Y electrode while the voltage of the Y electrode is increased, so that a negative wall charge is formed at the X electrode and a positive wall charge is formed at the Y electrode. Is formed. When the voltage of the X electrode is gradually changed as shown in FIG. 6, as shown in FIG. 7, the wall voltage Vw is formed by the wall charge generated by the weak discharge in the first region 120R. The intrinsic discharge start voltage Vf is shown together with the voltage Vnf applied at. This principle is disclosed in US Pat. No. 5,745,086 to Weber. In the reset period, since the states of all the first zones 120R must be initialized, the voltage Vset is high enough to cause a discharge in the first zone 120R of all the conditions. In addition, the Vs voltage is generally the same voltage as the voltage (Vs in FIG. 6) applied to the X electrode in the sustain period, and is lower than the discharge start voltage (VscL in FIG. 6) between the X electrode and the Y electrode for sustain discharge. to be.

Then, in the falling period of the reset period, the voltage of the Y electrode is gradually decreased from the Vs voltage to the -Vnf voltage while the X electrode is maintained at the reference voltage. Then, a slight discharge occurs between the X electrode and the Y electrode while the voltage of the X electrode decreases, thereby partially erasing the negative wall charge formed on the X electrode and the positive wall charge formed on the Y electrode. Because of this, at the end of the reset period, the magnitude of the -Vnf voltage is generally set near the discharge start voltage (VscL in Fig. 6) for sustain discharge between the X electrode and the Y electrode. Then, as shown in FIG. 7, the wall voltage Vw between the X electrode and the Y electrode becomes almost 0 V, thereby preventing the quasi discharge cell 120 in which the address discharge has not occurred in the address period from being erroneously discharged in the sustain period. have. Since the X electrode is maintained at the reference voltage, the wall voltage Vw between the X electrode and the Y electrode is determined by the level of the -Vnf voltage.

Next, a scan pulse having a voltage of -VscL and an address pulse having a Va voltage are applied to the X electrode to select the first region 120R to be turned on in the address period. The unselected Y electrode is biased to a -VscH voltage higher than the -VscL voltage, and a reference voltage is applied to the X electrode of the discharge cell 120 that will not be turned on.

As described above, in the exemplary embodiment of the present invention, the reset operation, the address operation, and the sustain discharge operation may be performed only by the driving waveform applied to the Y electrode while the X electrode is biased to the reference voltage. Therefore, since the conventional X electrode and the driving board for driving the same can be removed, the circuit cost is reduced.

On the other hand, according to the driving method, a high wall voltage is formed between the X electrode and the Y electrode even after the end of the reset period, so that an erroneous discharge may occur between the X electrode and the Y electrode. An embodiment capable of preventing such a discharging is also applied to the two-electrode ring structure of the present invention, which will be briefly described with reference to FIGS. 8 and 9.

8 is a conceptual diagram of driving waveforms using Vx in a two-electrode ring structure employing a lamp reset, and FIG. 9 is a conceptual diagram of state voltage between two electrodes using Vx in a two-electrode ring structure employing a lamp reset.

First, referring to FIG. 8, the driving waveform according to the second embodiment of the present invention is the same as that of the first embodiment except that the X electrode is biased to a constant voltage in the rising period of the reset period.

Specifically, in the rising period of the reset period, the voltage of the Y electrode is gradually increased from the Vs voltage to the Vset voltage while the X electrode is biased to a constant voltage (voltage higher than the reference voltage). In this case, when the Va voltage is used as the bias voltage of the X electrode as illustrated in FIG. 8, an additional power source may not be used. When the voltage of the Y electrode is increased while the voltage of the X electrode is biased to the Va voltage, as shown in FIG. 8, the wall voltage Vw between the X electrode and the Y electrode is smaller than that of the first embodiment, and thus the X electrode is smaller. The discharge start voltage is exceeded before the voltage between the and Y electrodes. Then, the weak discharge first occurs between the X electrode and the Y electrode, and the voltage between the X electrode and the Y electrode exceeds the discharge start voltage in the state where priming particles are formed by the weak discharge. The priming particles reduce the discharge delay between the X electrode and the Y electrode, so that the weak discharge is performed without generating the strong discharge as described above, thereby forming a desired amount of wall charge. Therefore, weak discharge does not occur even in the falling period of the reset period, and thus, the false discharge in the sustain period can be prevented.

For each zone 120R, 120G, 120B, the wall charge can be controlled by only the relative potentials of the two electrodes, introduce the low voltage Vx without using the high voltage Vnf, and use the same Vnf and Vs for Y Since the power can be reduced by one and Vx added to the X power is a low voltage region, the driving waveform of the two-electrode structure can be applied to reduce the device price.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to

The plasma display panel according to the present invention can drive red, green, and blue three-color cells within the minimum sub-pixels that can be processed at present.

In addition, in the plasma display panel according to the present invention, an electrode is provided in the partition wall so that at least one of the pair of substrates can be formed in a non-process, resulting in uniform cost-saving lines. Since the protective film is no longer used, a higher transmittance can be obtained compared to the existing ones, thereby improving luminance. In addition, the plasma display panel according to the present invention has an effect that allows simultaneous viewing on both sides, which is impossible.

In addition, the present invention can reduce one Y power supply by controlling the wall charge only by the relative potential of two electrodes per quasi discharge space, and lower the device price by applying a low voltage Vx.

Claims (13)

A first substrate and a second substrate facing each other at predetermined intervals; A partition wall partitioning a space formed between the first substrate and the second substrate into a plurality of discharge cells; A quasi-barrier partitioning each discharge cell into at least two zones divided along a direction perpendicular to the substrate; A first electrode formed in the partition wall so as to surround at least a portion of each discharge cell and extending in a first direction; A second electrode formed in the partition wall so as to surround at least a portion of each discharge cell at a predetermined distance from the first electrode and extending in a second direction crossing the first direction; And, Phosphor layer formed in each zone partitioned by the quasi-barrier Plasma display panel comprising a. The method of claim 1, And a phosphor layer which emits visible light of different colors in each of the regions defined by the quasi-dividing walls in each of the discharge cells. The method of claim 1, And the first substrate and the second substrate are both transparent substrates. The method of claim 1, And a dielectric layer is further formed on the partition wall. The method of claim 1, And an electrode pair consisting of the first electrode and the second electrode is disposed in each of the sections partitioned within the respective discharge cells. The method of claim 1, And the quasi-barrier is formed to protrude toward the inside of the discharge cell in a direction parallel to the substrate from the partition. The method of claim 6, And a phosphor layer having different colors on both sides of the quasi-barrier. The method of claim 1, And a sustain pulse applied to the first electrode in a sustain period. The method of claim 1, And a scan pulse is applied to the first electrode in an address period, and an address pulse is applied to the second electrode in an address period. The method of claim 2, Both the first substrate and the second substrate are transparent substrates, A dielectric layer is further formed on the partition wall, The electrode pair consisting of the first electrode and the second electrode is disposed for each zone partitioned within each discharge cell, The quasi-barrier is formed to protrude toward the inside of the discharge cell in a direction parallel to the substrate from the partition, Wherein each of the discharge cells is divided into three zones by the quasi-barrier walls, and the phosphor layers of red, green, and blue are respectively formed in the zones. A partition partitioning a space formed between the first substrate and the second substrate facing each other at a predetermined interval into a plurality of discharge cells, and partitioning each discharge cell into at least two or more regions divided in a direction perpendicular to the substrate. A quaternary partition wall, a first electrode formed in the partition wall to surround at least a portion of each of the discharge cells, and enclosing at least a portion of the discharge cells at a predetermined distance from the first electrode; And a second electrode formed in the partition wall and extending in a second direction crossing the first direction, wherein the discharge cell displays one frame in which one discharge cell has three subfields. In the driving method of the panel, In at least one subfield, Gradually increasing the voltage of the first electrode from the second voltage to the third voltage while gradually biasing the second electrode to the first voltage in the reset period, and then gradually decreasing the voltage from the fourth voltage to the fifth voltage. , Selecting a discharge cell to be turned on in the address period, and Sustaining and discharging the selected discharge cell by applying a pulse having alternately a sixth voltage and a seventh voltage lower than the sixth voltage to the first electrode while biasing the second electrode to the first voltage; Plasma display panel driving method comprising. The method of claim 11, And the first voltage is a ground voltage. The method according to claim 11 or 12, wherein In the address period, a scan pulse of an eighth voltage is applied to the first electrode, an address pulse of a fifth voltage is applied to the second electrode, and the eighth voltage is lower than the fifth voltage.

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