KR100637176B1 - Plasma display panel - Google Patents

Abstract

In the plasma display panel having a three-electrode surface discharge structure and having a distance between the scan electrode and the sustain electrode longer than the distance between the scan electrode and the address electrode, the discharge efficiency, brightness, and lifetime of the panel are improved, and the manufacturing cost is improved. It is aimed at reducing the degree.

In order to achieve the above object, the present invention, the front substrate and the rear substrate disposed in parallel to the front substrate; Barrier ribs disposed between the front substrate and the rear substrate and defining discharge cells generating discharge; Scan electrode lines and sustain electrode lines disposed in a front dielectric layer formed on a front substrate in a rear substrate direction and extending in one direction in which discharge cells extend; Address electrode lines disposed in the rear dielectric layer formed on the rear substrate in the front substrate direction and extending to cross the direction in which the scan electrode lines and the sustain electrode lines extend; A phosphor layer disposed in the discharge cells and positioned above the address electrode lines; And a discharge gas in the discharge cells, wherein the distance between the scan electrode lines and the sustain electrode lines that partition the discharge cells is formed to be longer than the distance between the address electrode lines and the scan electrode lines. Grooves are formed at positions between the scan electrode lines and the sustain electrode lines in the direction of the front substrate in the dielectric layer, and are driven by driving signals having a reset period, an address period, and a sustain discharge period.

In the sustain discharge period, a sustain pulse having an alternating first positive voltage and first negative voltage is applied to the scan electrode lines, a ground voltage is applied to the sustain electrode lines, and a short is applied to the address electrode lines. Provided is a plasma display panel characterized in that a pulse is applied.

Description

Plasma display panel {Plasma display panel}

1 is a timing diagram for explaining an example of a conventional driving signal.

2 is an exploded perspective view showing a plasma display panel of the present invention.

3 is a plan view of the plasma display panel of FIG. 2 taken along line II-II.

4 is a view schematically illustrating an electrode arrangement of the plasma display panel of FIG. 2.

FIG. 5 is a block diagram schematically illustrating an apparatus for driving a plasma display panel for implementing the method of driving the plasma display panel of FIG. 2.

FIG. 6 illustrates an address-display separation driving method for Y electrode lines as an example of the driving method of the plasma display panel of FIG. 2.

FIG. 7 is a timing diagram for describing a first embodiment of a drive signal of the panel shown in FIG. 2.

FIG. 8 is a timing diagram for describing a second embodiment of the drive signal of the panel shown in FIG. 2.

FIG. 9 is a timing diagram for describing a third embodiment of a drive signal of the panel shown in FIG. 2.

FIG. 10 is a timing diagram for describing a fourth exemplary embodiment of the drive signal of the panel shown in FIG. 2.

FIG. 11 is a timing diagram for describing a fifth exemplary embodiment of the drive signal of the panel shown in FIG. 2.

Explanation of symbols on the main parts of the drawings

1 ... plasma display panel, 110 ... front panel,

111 front panel, 112 scanning electrode,

113 holding electrode, 115 front dielectric layer,

116 front shield, 120 rear panel,

121 back panel, 122 address electrode,

123 rear dielectric layer, 124 bulkhead,

125 phosphor layer, 128 rear shield,

129 ... Home, Ce ... discharge cell,

Y1, ..., Yn ... scanning electrode lines, X1, ..., Xn ... holding electrode lines,

A1, A2, ..., Am ... address electrode lines,

Vs ... first voltage, Vset ... second voltage,

Vset + Vs ... third voltage, Vnf ... fourth voltage,

Vsch ... 5th voltage, Vscl ... 6th voltage,

Va ... 7th voltage, 400 ... image processing unit,

402 logic unit, 404 Y drive,

406 ... address drive,

Vs1, Vs2, Vs3, Vs4, Vs5, Vs6 ... ninth, tenth, eleventh, twelfth, thirteenth, and fourteenth voltages.

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having a three-electrode surface discharge structure, wherein a distance between a scan electrode and a sustain electrode is longer than a distance between a scan electrode and an address electrode.

Japanese Laid-Open Patent Publication No. 1999-120924 discloses a structure of a conventional plasma display panel. That is, address electrode lines, dielectric layers, scan electrode lines, sustain electrode lines, phosphor layers, barrier ribs, and magnesium monoxide (MgO) protective layers are provided between the front and back substrates of a conventional plasma display panel.

The address electrode lines are formed in a predetermined pattern on the front side of the back substrate. The back dielectric layer is applied to the front of the address electrode lines. In the front of the rear dielectric layer, barrier ribs are formed in a direction parallel to the address electrode lines. These partitions partition the discharge area of each discharge cell and serve to prevent optical interference between the discharge cells. The phosphor layer is applied in front of the rear dielectric layer on the address electrode lines between the partition walls, and a red light emitting phosphor layer, a green light emitting phosphor layer, and a blue light emitting phosphor layer are sequentially disposed.

The sustain electrode lines and the scan electrode lines are formed in a constant pattern on the rear side of the front substrate so as to be orthogonal to the address electrode lines. Each intersection sets a corresponding discharge cell. Each sustain electrode line and each scan electrode line may be formed by combining a transparent electrode line of a transparent conductive material such as indium tin oxide (ITO) and a metal electrode (bus electrode) line for increasing conductivity. The front dielectric layer is formed by coating the entire surface of the sustain electrode lines and the scan electrode lines. A protective layer for protecting the panel from a strong electric field, for example, a magnesium monoxide (MgO) layer is formed by applying the entire surface to the back of the front dielectric layer. The plasma forming gas is sealed in the discharge space.

The driving signal of FIG. 1 is used as a driving signal for driving a conventional plasma display panel. That is, one subfield SF has a reset period PR, an address period PA, and a sustain discharge period PS, and address electrode lines A1, A2, ..., Am, and sustain electrode line. Driving signals are applied to the fields X1, ..., Xn and the scan electrode lines Y1, ..., Yn, respectively.

First, the reset period PR applies a reset pulse to all the scan electrode lines Y1,..., And Yn to perform reset discharge, thereby initializing the wall charge state of all the discharge cells. The reset period PR is carried out before entering the address period PA, which is carried out over the entire screen, thus making it possible to create a fairly even and evenly distributed wall charge arrangement. To this end, as shown in FIG. 1, the ground voltage Vg is first applied to the scan electrode lines Y1,..., And Yn, and then the sustain discharge voltage Vs is applied, and the sustain discharge voltage Vs is applied. From the rising ramp function is applied to reach the highest rising voltage (Vset + Vs), which rises by the rising voltage (Vset), and then rapidly falls to the sustain discharge voltage (Vs), from the sustain discharge voltage (Vs) to the falling ramp function Is applied to reach the lowest falling voltage (V'nf). The ground voltage Vg is applied to the address electrode lines A1, A2, ..., Am during the reset period PR, and the rising ramp function is applied to the sustain electrode lines X1, ..., Xn. The bias voltage Vb is continuously applied from time to time.

Next, in the address period PA, in order to select a cell to be turned on, a bias voltage Vb is applied to the sustain electrode lines X1, ..., Xn, and the scan electrode lines Y1,. The scan high voltage V'sch is applied to Yn, and the scan pulses having the scan low voltage V'scl are sequentially applied to the scan electrode lines Y1, ..., Yn. A display data signal having an address voltage Va is applied to the address electrode lines A1, A2, ..., Am. As the scan pulse and the display data signal are applied, address discharge is performed in the selected discharge cell.

Next, in the sustain discharge period PS, the sustain electrode lines X1,..., Xn and the scan electrode lines Y1, so that the sustain discharge is performed in the cell to be turned on selected in the address period PA. ..., and a sustain pulse having a sustain discharge voltage Vs is applied alternately. The sustain discharge is performed by the wall charge accumulated in the discharge cell selected by the address discharge and the applied sustain discharge voltage Vs. Plasma is formed from the plasma forming gas of the discharge cells which perform the sustain discharge, and the phosphors of the discharge cells are excited by ultraviolet radiation from the plasma to generate light.

The conventional plasma display panel described above has a three-electrode surface discharge structure, in which the scan electrodes Y and the sustain electrodes X are arranged side by side behind the front substrate. Therefore, in the conventional plasma display panel driving method, the potential of the ion particles applied to the scanning electrode Y and the sustain electrode X during the sustain discharge during the driving of the panel by applying the driving signal as shown in FIG. Even if it is accelerated by the electric field formed by the electric field and impinges on the discharge gas, the discharge path of the ion particles accelerated by the electric field is limited to a certain range behind the front substrate so that the probability of collision with the discharge gas is short. As a result, the discharge was extremely lowered and the discharge was concentrated in a part of the space inside the discharge cell. As a result, the plasma display panel had low discharge efficiency and poor brightness. In addition, in order to drive the conventional plasma display panel, a driving signal corresponding to each of the scan electrode, the sustain electrode, and the address electrode has to be supplied. Accordingly, the manufacturing cost is high.

In order to solve the above problems, a plasma display panel having a three-electrode surface discharge structure and having a distance between a scan electrode and a sustain electrode longer than a distance between a scan electrode and an address electrode is provided. It aims at improving panel life and reducing manufacturing cost.

In order to achieve the above object, the present invention, the front substrate and the rear substrate disposed in parallel to the front substrate; Barrier ribs disposed between the front substrate and the rear substrate and defining discharge cells generating discharge; Scan electrode lines and sustain electrode lines disposed in a front dielectric layer formed on a front substrate in a rear substrate direction and extending in one direction in which discharge cells extend; Address electrode lines disposed in the rear dielectric layer formed on the rear substrate in the front substrate direction and extending to cross the direction in which the scan electrode lines and the sustain electrode lines extend; A phosphor layer disposed in the discharge cells and positioned above the address electrode lines; And a discharge gas in the discharge cells, wherein the distance between the scan electrode lines and the sustain electrode lines that partition the discharge cells is formed to be longer than the distance between the address electrode lines and the scan electrode lines. Grooves are formed at positions between the scan electrode lines and the sustain electrode lines in the direction of the front substrate in the dielectric layer,

Driven by a drive signal having a reset section, an address section, and a sustain discharge section,

In the sustain discharge period, a sustain pulse having an alternating first positive voltage and a first negative voltage is applied to the scan electrode lines, a ground voltage is applied to the sustain electrode lines, and a short pulse is applied to the address electrode lines. Provided is a plasma display panel characterized in that is applied.

According to another aspect of the present invention, in the plasma display panel, in the reset period, the rising ramp signal is applied to the scan electrode lines at the first voltage and finally reaches the third voltage which is increased by the second voltage. The falling ramp signal is applied at the first voltage to finally reach the fourth voltage, and the ground voltage is applied to the sustain electrode lines and the address electrode lines.

In the address period, the scan pulses having the sixth voltage are sequentially applied while the fifth voltage is applied to the scan electrode lines, and the display data signal having the seventh voltage is applied to the address electrodes according to the scan pulse. Ground voltages may be applied to the electrode lines.

According to another feature of the present invention, the sustain pulse may further have an eighth voltage, which is an intermediate voltage, between the first positive voltage and the first negative voltage.

According to another feature of the invention, the eighth voltage may be a ground voltage.

According to another feature of the invention, the pulse width of the short pulse may be less than half of the pulse width of the sustain pulse.

According to another feature of the invention, the short pulse has a positive ninth voltage less than or equal to the magnitude of the seventh voltage, the time point when the first positive voltage and the first negative voltage of the sustain pulse is applied Can be applied to.

According to another feature of the present invention, the short pulse has a positive tenth voltage less than or equal to the magnitude of the seventh voltage, and may be applied at the time when the first positive voltage of the sustain pulses is applied.

According to another feature of the invention, the short pulse has a positive eleventh voltage less than or equal to the magnitude of the seventh voltage, it may be applied when the first negative voltage of the sustain pulse is applied.

According to another feature of the invention, the short pulse has a negative voltage of the 12th voltage less than or equal to the magnitude of the seventh voltage, it can be applied at the time when the first negative voltage of the sustain pulse is applied. .

According to another feature of the invention, the short pulse has a positive 13th voltage less than or equal to the magnitude of the seventh voltage, is applied at the time when the first positive voltage of the sustain pulse is applied, the seventh voltage It has a fourteenth negative voltage less than or equal to the size of and may be applied at the time when the first negative voltage of the sustain pulse is applied.

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

2 is an exploded perspective view showing a plasma display panel of the present invention.

3 is a plan view of the plasma display panel of FIG. 2 taken along line II-II.

A description with reference to FIGS. 2 to 3 is as follows.

The plasma display panel 1 of FIG. 2 includes a front panel 110 and a rear panel 120, the front panel 110 having a front substrate 111, and the rear panel 120 having a rear substrate 121. ). The plasma display panel 1 is disposed between the front substrate 111 and the rear substrate 121, and partition walls 124 defining discharge cells Ce, which are spaces for generating discharge and generating light, for realizing an image. ).

The front panel 110 is disposed on the rear of the front substrate 111, that is, the rear surface of the front substrate, and includes a front dielectric layer disposed to cover the scan electrode lines 112 and the sustain electrode lines 113, which will be described later. 115). The scan electrode lines 112 and the sustain electrode lines 113 are bus electrodes 112a and 113a made of a metallic material to increase conductivity, and transparent electrodes 112b and 113b made of a transparent conductive material such as indium tin oxide (ITO). ). The scan electrode lines 112 and the sustain electrode lines 113 extend in one direction in which the discharge cells Ce extend.

The front passivation layer 116 for protecting the front dielectric layer 115 is preferably provided on the rear surface of the front dielectric layer 115.

The rear panel 120 may include the rear substrate 121 and a rear dielectric layer 123 formed on the rear substrate 121 in the direction of the front substrate 121. In the rear dielectric layer 123, address electrode lines 122 extend in a direction orthogonal to a direction in which the scan electrode lines 112 and the sustain electrode line 113 extend.

In addition, the rear panel 120 has partition walls 124 partitioning discharge cells on the rear dielectric layer 123, and the phosphor layer 125 disposed in a space defined by the partition walls 124. ). In order to protect the phosphor layer 125, it is preferable to provide a rear protective foil 128 on the entire surface of the phosphor layer 125.

The front panel 110 and the rear panel 120 are preferably coupled and sealed by a coupling member such as a frit (not shown), and need not necessarily be coupled by a coupling member such as frit, When the discharge gas in the discharge cells (Ce) is in a vacuum state, it may be combined at a pressure according to the vacuum state. On the other hand, the discharge cells (Ce) is made of any one or two or more of the mixed gas of neon (Ne), helium (He), or argon (Ar) including xenon (Xe) gas before and after 10%. The discharge gas is charged. On the other hand, it is also possible to make the content ratio of xenon (Xe) gas in the discharge gas to 10% or more.

The front substrate 111 and the rear substrate 121 are generally formed of glass, and the front substrate is preferably formed of a material having high light transmittance. On the other hand, the rear substrate 121 does not necessarily need to transmit light, and a wider selection range of materials than the front substrate 111 does not necessarily require a material having a high light transmittance such as glass. Rather, it may be more desirable to use a variety of materials that have high light reflectance or that can reduce reactive power.

In order to improve the brightness of the plasma display panel, a reflective layer (not shown) is disposed on the top surface of the rear substrate 121 or the top surface of the rear dielectric layer 123 or includes a light reflective material in the rear dielectric layer 123. The visible light generated by the phosphor may be efficiently reflected forward.

Since the transparent electrodes 112b and 113b of the scan electrode lines 112 and the sustain electrode lines 113 are disposed on the rear surface of the front substrate 111, the transparent electrodes 112b and 113b easily transmit visible light generated from the phosphor layer 125. You should be able to. As a material of the transparent electrode 112 having a good light transmittance, a material such as ITO, SnO 2, or ZnO may be used, and ITO is preferably used. On the other hand, the address electrode lines 122 do not need to consider light transmittance, so a wide selection range of electrode materials, it is preferable that Ag, Cu, Cr and the like with high electrical conductivity are used. A front passivation layer 116 may be formed on the rear surface of the front dielectric layer 115, and the front passivation layer 116 may protect the front dielectric layer 115 and emit secondary electrons so that the discharge may occur easily. I can help.

The distance between the scan electrode line 112 and the sustain electrode line 113 in the discharge cell Ce (hereinafter referred to as d1) is the scan electrode line 112 or the sustain electrode line 113 in the discharge cell ce. ) And a distance between the address electrode and the address electrode (hereinafter referred to as d2). It is preferable to make d1 into 100 micrometers or more.

Meanwhile, a groove 129 is formed between the scan electrode lines 112 and the sustain electrode lines 113 in the front dielectric layer 115 of the front panel 110 in the direction of the front substrate 111. That is, the groove 129 is formed such that the front dielectric layer 115 and the front passivation layer 116 are recessed in the direction of the front substrate 111 between the scan electrode lines 112 and the sustain electrode line 113.

Meanwhile, the partition walls 124 disposed between the front substrate 111 and the rear substrate 121 are formed to define discharge cells Ce together with the front substrate 111 and the rear substrate 121. In FIG. 2, the partition walls 124 divide the discharge cells Ce into a matrix, but the partition walls 124 are not limited thereto and may be partitioned into various shapes such as a honeycomb form and a delta form. In addition, although the cross section of the discharge cell Ce is illustrated in FIG. 3 as being rectangular, the present invention is not limited thereto and may be a polygon such as a triangle, a pentagon, or a circle, an ellipse, or the like.

The barrier ribs 124 may be formed on the rear dielectric layer 123, and may be formed of a glass component including elements such as Pb, B, Si, Al, and O, and the like. Accordingly, fillers such as ZrO 2, TiO 2, and Al 2 O 3 and pigments such as Cr, Cu, Co, Fe, TiO 2 may be included. The partition walls 124 secure a space in which the phosphor layer 125 may be applied, and together with the front partition walls 115, the partition walls 124 may be formed of discharge gas charged inside the front panel 110 and the rear panel 120. It supports the pressure generated due to the vacuum state (for example 0.5 atm), secures the space of the discharge cell (Ce), and serves to prevent cross talk between the discharge cells (Ce). Can be. A red, green, or blue light emitting phosphor layer 125 may be disposed in a space defined by the partitions 124, and the phosphor layer 125 is partitioned by the partitions 124.

The phosphor layer 125 is a phosphor paste in which any one of a phosphor, a solvent, and a binder of a red light emitting phosphor, a green light emitting phosphor, and a blue light emitting phosphor is mixed is applied to the front and rear partitions 124 of the rear dielectric layer 123. After forming and drying and firing. Examples of the red light emitting phosphor include Y (V, P) O 4: Eu, and examples of the green light emitting phosphor include ZnSi 4 4: Mn, YBO 3: Tb, and the blue light emitting phosphor include BAM: Eu.

A rear passivation layer 128 made of MgO or the like may be formed on the entire surface of the phosphor layer 125. The rear passivation layer 128 prevents the phosphor layer from deteriorating due to collision of discharge particles when discharge occurs in the discharge cell Ce, and emits secondary electrons so that the discharge can easily occur. I can help.

4 is a diagram schematically illustrating an electrode arrangement of the plasma display panel of FIG. 2.

Referring to FIGS. 2 to 4, the scan electrode lines Y1,..., And Yn and the sustain electrode lines X1,..., Xn are disposed in parallel with each other. That is, scan electrode lines Y1,..., Yn and sustain electrode lines X1,..., Xn are disposed in the front dielectric layers 115. Address electrode lines A1, A2, ..., Am are disposed so as to be orthogonal to the scan electrode lines Y1, ..., Yn and sustain electrode lines X1, ..., Xn. In the region where the scan electrode lines Y1, ..., Yn and the sustain electrode lines X1, ..., Xn intersect with the address electrode lines A1, A2, ..., Am. The discharge cells Ce are partitioned.

FIG. 5 is a block diagram schematically illustrating an apparatus for driving a plasma display panel for implementing the method of driving the plasma display panel of FIG. 2.

4 and 5, the driving apparatus of the plasma display panel includes an image processor 400, a logic controller 402, a Y driver 404, an address driver 406, and a plasma display panel 1. Equipped.

The image processor 400 receives an external video signal such as a PC signal, a DVD signal, a video signal, or a TV signal from the outside, converts an analog signal into a digital signal, and processes the digital signal into an internal video signal. The internal video signals are 8-bit red (R), green (G), and blue (B) image data, clock signals, and vertical and horizontal sync signals, respectively.

The logic controller 402 receives an internal image signal from the image processor 400 and performs an gamma correction, an automatic power control (APC) step, and the like, to respectively output an address driving control signal SA and a Y driving control signal SY. Output

The Y driver 404 receives the Y drive control signal SY from the logic controller 402, and has an erase pulse having an erase voltage for initialization discharge in the reset period (PR of FIG. 7), and an address period (FIG. 7). And a scan signal having a negative scan low voltage (Vscl in FIG. 7) sequentially along the vertical direction of the panel 1 while a positive scan high voltage (Vsch in FIG. 7) is applied to PA). The sustain pulses having alternating positive sustain discharge voltage (Vs in FIG. 7) and negative sustain discharge voltage (-Vs in FIG. 7) in PS of FIG. 7 are scanned electrode lines of the plasma display panel 1. Applies to (Y1, ..., Yn).

The address driver 406 receives the address drive control signal SA from the logic controller 402 and has an address voltage (Va) of FIG. 7 in a cell to be turned on among all cells in the address period (PA of FIG. 7). The display data signal is output to the address electrode lines of the plasma display panel 1. Also in connection with the present invention, a short pulse is applied in the sustain discharge period. The voltage of the short pulse may be a voltage less than or equal to the address voltage Va of FIG. 7.

Unlike the conventional driving device, in the present invention, there is no X driving part, and thus, the ground voltage Vg is continuously applied to the sustain electrode lines X1,..., Xn.

FIG. 6 illustrates an address-display separation driving method for Y electrode lines as an example of the driving method of the plasma display panel of FIG. 2.

4 and 6, a unit frame may be divided into a predetermined number, for example, eight subfields SF1,..., SF8 to realize time division gray scale display. Further, each subfield SF1, ... SF8 is divided into a reset section (not shown), an address section A1, ..., A8, and a sustain discharge section S1, ..., S8. .

In each address section A1, ..., A8, a display data signal is applied to the address electrode lines A1, A2, ..., Am and at the same time, the scan electrode lines Y1, ..., Yn Are sequentially applied.

In each sustain discharge section S1, ..., S8, sustain pulses are alternately applied to the scan electrode lines Y1, ..., Yn and sustain electrode lines X1, ..., Xn. , Sustain discharge occurs in the discharge cells in which wall charges are formed in the address periods A1, ..., A8.

The luminance of the plasma display panel is proportional to the number of sustain discharge pulses in the sustain discharge sections S1, ..., S8 occupied in the unit frame. When one frame forming one image is represented by eight subfields and 256 gradations, each subfield is kept different at a ratio of 1, 2, 4, 8, 16, 32, 64, and 128 in turn. The number of pulses can be assigned. In order to obtain luminance of 133 gradations, cells may be addressed and sustained and discharged during the subfield 1 period, the subfield 3 period, and the subfield 8 period.

The number of sustain discharges allocated to each subfield may be variably determined according to weights of the subfields according to the APC (Automatic Power Control) step. The number of sustain discharges allocated to each subfield can be variously modified in consideration of gamma characteristics and panel characteristics. For example, the gray level assigned to subfield 4 may be lowered from 8 to 6, and the gray level assigned to subfield 6 may be increased from 32 to 34. In addition, the number of subfields forming one frame can be variously modified according to design specifications.

FIG. 7 is a timing diagram for describing a first embodiment of a drive signal of the panel shown in FIG. 2.

Referring to the drawings, the subfield SF includes a reset period PR, an address period PA, and a sustain discharge period PS.

In the reset period PR, the ground voltage Vg is first applied to the scan electrode lines Y1, ..., Yn. Next, the sustain discharge voltage Vs, which is the first voltage, is rapidly applied, and the rising ramp signal is applied from the first voltage Vs, and the highest rise is the third voltage that is raised by the rising voltage Vset, which is the second voltage. The voltage Vset + Vs is reached. The weak discharge occurs due to the application of the rising ramp signal having an inclined slope, and the negative discharge starts to accumulate in the vicinity of the scan electrode lines Y1,..., And Yn. Next, after rapidly falling to the first voltage Vs, a falling ramp signal is applied to reach the fourth falling voltage Vnf. Unlike the conventional driving signal illustrated in FIG. 1, the driving signal according to the present invention does not use the X driving unit which supplies the driving signal to the sustain electrode lines X1,. In order to compensate for the bias voltage (Vb of FIG. 1) applied to the sustain electrode lines X1,..., Xn, a falling slope is more sharp than that of a conventional driving signal. Therefore, the magnitude of the fourth falling voltage Vnf, which is the falling lowest voltage of FIG. 7, of the present invention is larger than that of the falling lowest voltage V′nf of FIG. 1. As the falling ramp signal is applied, a discharge occurs, and a portion of the negative charges accumulated near the scan electrode lines Y1,..., And Yn is emitted while the discharge occurs. As a result, a positive charge is left in the vicinity of the scan electrode lines Y1,..., And Yn in order to generate an address discharge. The ground voltage Vg is applied to the sustain electrode lines X1, ..., Xn and the address electrode lines A1, A2, ..., Am.

Next, in order to select a cell to be turned on in the address period PA, a scan high voltage Vsch, which is a fifth voltage, is first applied to the scan electrode lines Y1,. A scan pulse having a scan low voltage Vscl, which is a sixth voltage, is applied to each line. A display data signal having an address voltage Va, which is a seventh voltage, is applied to the address electrode lines A1, A2, ..., Am in accordance with the scan pulse. The ground voltage Vg is continuously applied to the sustain electrode lines X1,..., Xn. The address discharge is performed by the seventh voltage Va, the sixth voltage Vscl, the wall voltage caused by the negative charge near the scan electrode Y, and the wall voltage caused by the positive charge near the address electrode A. After the address discharge is performed, positive charges are accumulated near the scan electrode Y, and negative charges are accumulated near the sustain electrode X.

In the sustain discharge period PS, a sustain pulse having a positive first voltage Vs and a negative first voltage -Vs is applied to the scan electrode lines Y1, ..., Yn. The ground voltage Vg is applied to the electrode lines X1,..., And Xn, and a short pulse is applied to the address electrode lines.

Meanwhile, an eighth voltage, which is an intermediate voltage, may be further included between the first positive voltage Vs and the first negative voltage −Vs. The eighth voltage may be a ground voltage Vg. By further having an intermediate voltage, it is possible to prevent a sudden voltage change between the first positive voltage Vs and the first negative voltage -Vs.

In FIG. 7, the short pulse is applied when the first positive voltage Vs and the first negative voltage −Vs of the sustain pulses are applied. Preferably, the pulse width of the short pulse is smaller than half the pulse width of the sustain pulse. In addition, the short pulse may have a magnitude of the positive ninth voltage Vs1, and the magnitude of the ninth voltage Vs1 may be less than or equal to the magnitude of the seventh voltage Va.

In the structure of the plasma display panel shown in FIG. 2, the distance d1 between the sustain electrode X and the scan electrode Y in the discharge cell is between the scan electrode Y or between the sustain electrode X and the address electrode A. FIG. It is characterized by being longer than the distance d2. For example, d1 may be 200 μm or more. When d1> d2, the discharge volume becomes large at the time of discharge, and the brightness improves. However, if the distance of d1 is too large, the sustain discharge can be performed only by increasing the voltage applied to the sustain electrode and the voltage applied to the scan electrode, and the high voltage must be supplied from the power supply device, thereby increasing the manufacturing cost of the plasma display panel. Will be higher. Therefore, it is preferable to make d1 more than 100 micrometers. In addition, in order to solve the above problem, the structure of the plasma display panel according to the present invention has the scan electrode lines 112 and the sustain electrode lines 113 in the direction of the front substrate 111 in the front dielectric layer 115. Preferably, the groove 129 is formed at a position therebetween. At the start of the groove 129 due to the voltage applied to the sustain electrode (X) and the scan electrode (Y) during the sustain discharge, a more concentrated electric field is formed, so that the sustain discharge easily occurs and gradually expands to the entire discharge cell. do. Therefore, the problem when d1> d2 is made up is solved. In addition, it is preferable to apply a short pulse to the address electrode during sustain discharge.

First, when the first positive voltage Vs is applied to the scan electrode Y, the first positive voltage Vs applied to the scan electrode Y and the ground voltage applied to the sustain electrode X are applied. Vg), the wall discharge due to the positive charge accumulated near the scan electrode (Y), and the wall voltage due to the negative charge accumulated near the sustain electrode (X), and the sustain discharge is performed, and the negative charge near the scan electrode (Y) Are stacked, and positive charges are stacked in the vicinity of the sustain electrode (X). At this time, a short pulse having a ninth voltage Vs1 is instantaneously applied to the address electrode A, and a part of the negative charge accumulated in the vicinity of the scan electrode Y is momentarily near the address electrode A by the short pulse. It moves to, thereby increasing the discharge volume of the sustain discharge. Due to the expansion of the discharge volume, the discharge efficiency is increased, the luminance is also improved, and ion sputtering by the charged particles of the discharge gas in the phosphor is reduced as compared with the prior art, thereby improving the lifetime of the plasma display panel. However, the pulse width of the applied short pulse is preferably less than half of the pulse width of the sustain pulse so that a large amount of negative charges are not drawn from the scan electrode Y due to the application of the short pulse. In addition, it is preferable that the magnitude of the ninth voltage Vs1 which is the voltage of the short pulse is smaller than the magnitude of the seventh voltage Va. However, considering the increase in manufacturing cost caused by supplying various power sources from the power supply device, the magnitude of the ninth voltage Vs1 may be the same as the magnitude of the seventh voltage Va.

Next, a negative first voltage (-Vs) is applied to the scan electrode Y, and a ground voltage Vg is applied to the sustain electrode X. The first negative voltage (-Vs) applied to the scan electrode (Y), the ground voltage (Vg) applied to the sustain electrode (X), and the wall voltage due to the negative charge accumulated near the scan electrode (Y) and the sustain As the sustain discharge is performed due to the wall voltage due to the positive charge accumulated on the electrode X, the positive charge is accumulated near the scan electrode Y, and the negative charge is accumulated near the sustain electrode X. At this time, a short pulse having a positive ninth voltage Vs1 is instantaneously applied to the address electrode A, and a part of the negative charge accumulated in the vicinity of the sustain electrode X is instantaneously accumulated by the short pulse. ), The discharge volume of the sustain discharge increases. Due to the expansion of the discharge volume, the discharge efficiency is increased, the luminance is also improved, and the life of the panel is improved.

Next, the first positive voltage Vs is applied to the scan electrode Y, and the ground voltage Vg is applied to the sustain electrode X. The maintenance discharge is continued by repeating the above process.

FIG. 8 is a timing diagram for describing a second embodiment of a drive signal of the panel shown in FIG. 2.

The reset period PR and the address period PA are as described in FIG.

In the sustain discharge period PS, a sustain pulse having a positive first voltage Vs and a negative first voltage -Vs is applied to the scan electrode lines Y1, ..., Yn. The ground voltage Vg is applied to the electrode lines X1,..., And Xn, and a short pulse is applied to the address electrode lines. Meanwhile, an eighth voltage, which is an intermediate voltage, may be further included between the first positive voltage Vs and the first negative voltage −Vs, and the eighth voltage may be a ground voltage Vg.

In FIG. 8, the short pulse is applied at a time point when the positive first voltage Vs is applied among the sustain pulses. Preferably, the pulse width of the short pulse is smaller than half the pulse width of the sustain pulse. In addition, the short pulse may have a magnitude of the positive tenth voltage Vs2, and the magnitude of the tenth voltage Vs2 may be smaller than or equal to the magnitude of the seventh voltage Va.

First, when the first positive voltage Vs is applied to the scan electrode Y, the first positive voltage Vs applied to the scan electrode Y and the ground voltage applied to the sustain electrode X are applied. Vg), the wall discharge due to the positive charge accumulated near the scan electrode (Y), and the wall voltage due to the negative charge accumulated near the sustain electrode (X), and the sustain discharge is performed, and the negative charge near the scan electrode (Y) Are stacked, and positive charges are stacked in the vicinity of the sustain electrode (X). At this time, a short pulse having a positive 10 voltage Vs2 is instantaneously applied to the address electrode A, and a part of the negative charge accumulated in the vicinity of the scan electrode Y is instantaneously accumulated by the short pulse. In this case, the discharge volume of the sustain discharge increases. Due to the expansion of the discharge volume, the discharge efficiency is increased, the luminance is also improved, and the life of the panel is improved. However, the pulse width of the applied short pulse is preferably less than half of the pulse width of the sustain pulse so that a large amount of negative charges are not drawn from the scan electrode Y due to the application of the short pulse. In addition, it is preferable that the magnitude of the tenth voltage Vs2 which is the voltage of the short pulse is smaller than the magnitude of the seventh voltage Va. However, in consideration of an increase in manufacturing cost caused by supplying various powers from the power supply device, the magnitude of the tenth voltage Vs2 may be the same as the magnitude of the seventh voltage Va.

Next, a negative first voltage (-Vs) is applied to the scan electrode Y, and a ground voltage Vg is applied to the sustain electrode X. The first negative voltage (-Vs) applied to the scan electrode (Y), the ground voltage (Vg) applied to the sustain electrode (X), and the wall voltage due to the negative charge accumulated near the scan electrode (Y) and the sustain As the sustain discharge is performed due to the wall voltage due to the positive charge accumulated on the electrode X, the positive charge is accumulated near the scan electrode Y, and the negative charge is accumulated near the sustain electrode X.

Next, the first positive voltage Vs is applied to the scan electrode Y, and the ground voltage Vg is applied to the sustain electrode X. The maintenance discharge is continued by repeating the above process.

FIG. 9 is a timing diagram for describing a third embodiment of the drive signal of the panel shown in FIG. 2.

The reset period PR and the address period PA are as described in FIG.

In the sustain discharge period PS, a sustain pulse having a positive first voltage Vs and a negative first voltage -Vs is applied to the scan electrode lines Y1, ..., Yn. The ground voltage Vg is applied to the electrode lines X1,..., And Xn, and a short pulse is applied to the address electrode lines. Meanwhile, an eighth voltage, which is an intermediate voltage, may be further included between the first positive voltage Vs and the first negative voltage −Vs, and the eighth voltage may be a ground voltage Vg.

In FIG. 9, the short pulse is applied at a time point when the negative first voltage (−Vs) is applied among the sustain pulses. The pulse width of the short pulse is preferably less than half of the pulse width of the sustain pulse. In addition, the short pulse may have a magnitude of the positive eleventh voltage Vs3, and the magnitude of the eleventh voltage Vs3 may be less than or equal to the magnitude of the seventh voltage Va.

First, when the first positive voltage Vs is applied to the scan electrode Y, the first positive voltage Vs applied to the scan electrode Y and the ground voltage applied to the sustain electrode X are applied. Vg), the wall discharge due to the positive charge accumulated near the scan electrode Y, and the wall voltage due to the negative charge accumulated near the sustain electrode X, and the sustain discharge are performed, and the negative charge near the scan electrode Y Are stacked, and positive charges are stacked in the vicinity of the sustain electrode (X).

Next, a negative first voltage (-Vs) is applied to the scan electrode Y, and a ground voltage Vg is applied to the sustain electrode X. The first negative voltage (-Vs) applied to the scan electrode (Y), the ground voltage (Vg) applied to the sustain electrode (X), and the wall voltage due to the negative charge accumulated near the scan electrode (Y) and the sustain As the sustain discharge is performed due to the wall voltage due to the positive charge accumulated on the electrode X, the positive charge is accumulated near the scan electrode Y, and the negative charge is accumulated near the sustain electrode X. At this time, a short pulse having a positive eleventh voltage Vs3 is instantaneously applied to the address electrode A, and a part of the negative charges accumulated in the vicinity of the sustain electrode X is instantaneously accumulated by the short pulse. ), The discharge volume of the sustain discharge increases. Due to the expansion of the discharge volume, the discharge efficiency is increased, the luminance is also improved, and the life of the panel is improved. However, the pulse width of the applied short pulse is preferably less than half of the pulse width of the sustain pulse so that a large amount of negative charges are not taken from the sustain electrode X due to the application of the short pulse. In addition, it is preferable that the magnitude of the eleventh voltage Vs3 which is the voltage of the short pulse is smaller than the magnitude of the seventh voltage Va. However, considering the increase in manufacturing cost caused by supplying various powers from the power supply device, the magnitude of the eleventh voltage Vs3 may be the same as the magnitude of the seventh voltage Va.

Next, the first positive voltage Vs is applied to the scan electrode Y, and the ground voltage Vg is applied to the sustain electrode X. The maintenance discharge is continued by repeating the above process.

FIG. 10 is a timing diagram for describing a fourth exemplary embodiment of the drive signal of the panel shown in FIG. 2.

The reset period PR and the address period PA are as described in FIG.

In the sustain discharge period PS, a sustain pulse having a positive first voltage Vs and a negative first voltage -Vs is applied to the scan electrode lines Y1, ..., Yn. The ground voltage Vg is applied to the electrode lines X1,..., And Xn, and a short pulse is applied to the address electrode lines. Meanwhile, an eighth voltage, which is an intermediate voltage, may be further included between the first positive voltage Vs and the first negative voltage −Vs, and the eighth voltage may be a ground voltage Vg.

In FIG. 10, the short pulse is applied at a time point when the negative first voltage (−Vs) is applied among the sustain pulses. Preferably, the pulse width of the short pulse is smaller than half the pulse width of the sustain pulse. In addition, the short pulse may have a magnitude of the negative twelfth voltage Vs4, and the magnitude of the twelfth voltage Vs4 may be smaller than or equal to the magnitude of the seventh voltage Va.

First, when the first positive voltage Vs is applied to the scan electrode Y, the first positive voltage Vs applied to the scan electrode Y and the ground voltage applied to the sustain electrode X are applied. Vg), the wall discharge due to the positive charge accumulated near the scan electrode (Y), and the wall voltage due to the negative charge accumulated near the sustain electrode (X), and the sustain discharge is performed, and the negative charge near the scan electrode (Y) Are stacked, and positive charges are stacked in the vicinity of the sustain electrode (X).

Next, a negative first voltage (-Vs) is applied to the scan electrode Y, and a ground voltage Vg is applied to the sustain electrode X. The first negative voltage (-Vs) applied to the scan electrode (Y), the ground voltage (Vg) applied to the sustain electrode (X), and the wall voltage due to the negative charge accumulated near the scan electrode (Y) and the sustain As the sustain discharge is performed due to the wall voltage due to the positive charge accumulated on the electrode X, the positive charge is accumulated near the scan electrode Y, and the negative charge is accumulated near the sustain electrode X. At this time, a short pulse having a negative twelfth voltage Vs4 is instantaneously applied to the address electrode A, and a part of the positive charges accumulated in the vicinity of the scan electrode Y is instantaneously accumulated by the short pulse. A) is moved to the vicinity, thereby increasing the discharge volume of the sustain discharge. Due to the expansion of the discharge volume, the discharge efficiency is increased, the luminance is also improved, and the life of the panel is improved. However, the pulse width of the applied short pulse is preferably less than half of the pulse width of the sustain pulse so that a large amount of positive charges are not taken from the scan electrode Y due to the application of the short pulse. In addition, it is preferable that the magnitude of the twelfth voltage Vs4 which is the voltage of the short pulse is smaller than the magnitude of the seventh voltage Va. However, in consideration of an increase in manufacturing cost caused by supplying various powers from the power supply device, the twelfth voltage Vs4 may be equal to the magnitude of the seventh voltage Va.

Next, the first positive voltage Vs is applied to the scan electrode Y, and the ground voltage Vg is applied to the sustain electrode X. The maintenance discharge is continued by repeating the above process.

FIG. 11 is a timing diagram for describing a fifth exemplary embodiment of the drive signal of the panel shown in FIG. 2.

The reset period PR and the address period PA are as described in FIG.

In the sustain discharge period PS, a sustain pulse having a positive first voltage Vs and a negative first voltage -Vs is applied to the scan electrode lines Y1, ..., Yn. The ground voltage Vg is applied to the electrode lines X1,..., And Xn, and a short pulse is applied to the address electrode lines. Meanwhile, an eighth voltage, which is an intermediate voltage, may be further included between the first positive voltage Vs and the first negative voltage −Vs, and the eighth voltage may be a ground voltage Vg.

In FIG. 11, the short pulse is applied at the time when the first positive voltage Vs is applied and the time at which the first negative voltage −Vs is applied. Preferably, the pulse width of the short pulse is smaller than half the pulse width of the sustain pulse. In addition, the short pulse has a positive thirteenth voltage Vs5 at the time when the first positive voltage Vs is applied, and has a negative thirteenth point at the time when the first negative voltage (-Vs) is applied. Has a voltage Vs6. The magnitude of the thirteenth voltage Vs5 or the fourteenth voltage Vs6 may be smaller than or equal to the magnitude of the seventh voltage Va.

First, when the first positive voltage Vs is applied to the scan electrode Y, the first positive voltage Vs applied to the scan electrode Y and the ground voltage applied to the sustain electrode X are applied. Vg), the wall discharge due to the positive charge accumulated near the scan electrode (Y), and the wall voltage due to the negative charge accumulated near the sustain electrode (X), and the sustain discharge is performed, and the negative charge near the scan electrode (Y) Are stacked, and positive charges are stacked in the vicinity of the sustain electrode (X). At this time, a short pulse having a positive thirteenth voltage Vs5 is instantaneously applied to the address electrode A, and a part of the negative charge accumulated in the vicinity of the scan electrode Y is instantaneously accumulated by the short pulse. ), The discharge volume of the sustain discharge increases. Due to the expansion of the discharge volume, the discharge efficiency is increased, the luminance is also improved, and the life of the panel is improved. However, the pulse width of the applied short pulse is preferably less than half of the pulse width of the sustain pulse so that a large amount of negative charges are not drawn from the scan electrode Y due to the application of the short pulse. In addition, the magnitude of the thirteenth voltage Vs5 which is the voltage of the short pulse is preferably smaller than the magnitude of the seventh voltage Va. However, in consideration of an increase in manufacturing cost caused by supplying various powers from the power supply device, the size of the thirteenth voltage Vs5 may be the same as that of the seventh voltage Va.

Next, a negative first voltage (-Vs) is applied to the scan electrode Y, and a ground voltage Vg is applied to the sustain electrode X. The first negative voltage (-Vs) applied to the scan electrode (Y), the ground voltage (Vg) applied to the sustain electrode (X), and the wall voltage due to the negative charge accumulated near the scan electrode (Y) and the sustain As the sustain discharge is performed due to the wall voltage due to the positive charge accumulated on the electrode X, the positive charge is accumulated near the scan electrode Y, and the negative charge is accumulated near the sustain electrode X. At this time, a short pulse having a negative 14th voltage Vs6 is instantaneously applied to the address electrode A, and a part of the positive charges accumulated in the vicinity of the scan electrode Y is instantaneously accumulated by the short pulse. A) is moved to the vicinity, thereby increasing the discharge volume of the sustain discharge. Due to the expansion of the discharge volume, the discharge efficiency is increased, the luminance is also improved, and the life of the panel is improved. However, the pulse width of the applied short pulse is preferably less than half of the pulse width of the sustain pulse so that a large amount of positive charges are not taken from the scan electrode Y due to the application of the short pulse. In addition, it is preferable that the magnitude of the fourteenth voltage Vs6 which is a voltage of the short pulse is smaller than the magnitude of the seventh voltage Va. However, in consideration of an increase in manufacturing cost caused by supplying various powers from the power supply device, the magnitude of the fourteenth voltage Vs6 may be the same as the magnitude of the seventh voltage Va.

Next, the first positive voltage Vs is applied to the scan electrode Y, and the ground voltage Vg is applied to the sustain electrode X. The maintenance discharge is continued by repeating the above process.

According to the present invention as described above, the following effects can be obtained.

First, in the plasma display panel, the distance between the sustain electrode and the scan electrode is longer than the distance between the scan electrode or the sustain electrode and the address electrode in the three-electrode surface discharge structure, whereby the discharge volume is increased to improve luminance.                     

Second, in order to solve the disadvantage that a high voltage is required in the discharge generated in the structure of the plasma display panel, a groove is formed between the sustain electrode and the scan electrode in the direction of the front substrate in the front dielectric layer, so that the electric field is concentrated near the groove during the sustain discharge. As a result, discharge is easily generated, and the discharge efficiency is increased by enlarging the entire discharge cells.

Third, by applying a short pulse to the address electrode during the sustain discharge period, the positive or negative charge is attracted to the vicinity of the address electrode. The discharge efficiency and brightness are improved by expanding.

Fourth, since the discharge volume is increased, the ion sputtering by the charged particles of the discharge gas to the phosphor is reduced as compared with the conventional, the life of the plasma display panel can be improved.

Fifth, in the present invention, since the plasma display panel is driven without using the X driver for supplying driving signals to the sustain electrode lines, the manufacturing cost of the plasma display panel can be further reduced.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (10)

A rear substrate disposed in parallel with the front substrate and the front substrate; Barrier ribs disposed between the front substrate and the rear substrate and defining discharge cells generating discharge; Scan electrode lines and sustain electrode lines disposed in the front dielectric layer formed on the front substrate in the rear substrate direction and extending in one direction in which the discharge cells extend; Address electrode lines disposed on a rear dielectric layer formed on the rear substrate in a direction toward the front substrate and extending to cross a direction in which the scan electrode lines and the sustain electrode lines extend; A phosphor layer disposed in the discharge cells and positioned above the address electrode lines; And a discharge gas in the discharge cells, wherein a distance between the scan electrode lines and the sustain electrode lines that divide the discharge cells is longer than a distance between the address electrode lines and the scan electrode lines. A groove is formed in the front dielectric layer at a position between the scan electrode lines and the sustain electrode lines in the front substrate direction; Driven by a drive signal having a reset section, an address section, and a sustain discharge section, In the sustain discharge period, a sustain pulse having an alternating first positive voltage and first negative voltage is applied to the scan electrode lines, a ground voltage is applied to the sustain electrode lines, and the address electrode line. A short pulse is applied to the field, The pulse width of the short pulse is less than half of the pulse width of the sustain pulse, And the short pulse is applied when a first positive voltage or a first negative voltage of the sustain pulses is applied. The method of claim 1, In the reset period, a rising ramp signal is applied to the scan electrode lines at a first voltage to finally reach a third voltage that is increased by a second voltage, and a falling ramp signal is applied at the first voltage to finally generate a first voltage. 4 voltage is reached, and the ground voltage is applied to the sustain electrode lines and the address electrode lines. In the address period, a scan pulse having a sixth voltage is sequentially applied to the scan electrode lines while a fifth voltage is applied, and a display data signal having a seventh voltage is applied to the address electrodes according to the scan pulse. And the ground voltage is applied to the scan electrode lines. The method of claim 1, wherein the holding pulse, And an eighth voltage, which is an intermediate voltage, between the first positive voltage and the first negative voltage. The method of claim 3, wherein the eighth voltage is And the ground voltage. delete The method of claim 2, wherein the short pulse, And a ninth voltage having a positive polarity less than or equal to the magnitude of the seventh voltage, and being applied at a time point when the first positive voltage and the first negative voltage of the sustain pulses are applied. Display panel. The method of claim 2, wherein the short pulse, And a positive tenth voltage less than or equal to the magnitude of the seventh voltage, and applied at a time point when the first positive voltage of the sustain pulses is applied. The method of claim 2, wherein the short pulse, And an eleventh voltage having a positive polarity less than or equal to the magnitude of the seventh voltage, and being applied when a first negative voltage of the sustain pulses is applied. The method of claim 2, wherein the short pulse, And a twelfth voltage having a negative polarity less than or equal to the magnitude of the seventh voltage, and being applied at the time when the first negative voltage is applied among the sustain pulses. The method of claim 2, wherein the short pulse, A negative thirteenth voltage having a positive thirteenth voltage less than or equal to the magnitude of the seventh voltage, and applied when a first positive voltage among the sustain pulses is applied; and a fourth negative voltage less than or equal to the magnitude of the seventh voltage; And a voltage, which is applied at a time point at which a first negative voltage of the sustain pulses is applied.

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