KR100573168B1 - Driving method of plasma display panel - Google Patents

Abstract

It is an object of the present invention to provide a method of driving a plasma display panel in which power consumption generated in a sustain period is reduced in a subfield in which sustain discharge does not occur, and stable discharge is performed in a subfield in which sustain discharge occurs. .

In order to achieve the above object, in the present invention, for the gradation display of a unit frame representing an image, the unit frame is composed of a plurality of subfields, each subfield being turned on for a reset period for initializing a discharge cell. In the driving method of the plasma display panel is configured by the address period in which the discharge cell to be selected is selected, and the sustain period in which the sustain discharge is performed according to the gray scale weight for each subfield in the selected discharge cell,

 A high level voltage is applied to the scan electrode lines and the sustain electrode lines during the sustain period of the predetermined subfields in which the sustain discharge is not performed, and the sustain period of the predetermined subfields is the predetermined period. To provide.

Description

Driving method of plasma display panel {Driving method of plasma display panel}

FIG. 1 illustrates an address display separation driving method for scan electrode lines as an example of a driving method of a plasma display panel.

FIG. 2 is a timing diagram illustrating driving signals for driving a plasma display panel in subfields 3 and 4 shown in FIG. 1.

FIG. 3 is a timing diagram showing in detail the sustain period of the subfield 3 shown in FIG. 2.

4 is a graph showing a relationship between a total sustain period and a gray level in a conventional unit frame.

FIG. 5 is a timing diagram illustrating driving signals in a third subfield and a fourth subfield as one example of a method of driving the plasma display panel of the present invention.

6 is a timing diagram illustrating driving signals in the third subfield and the fourth subfield as another example of the method of driving the plasma display panel of the present invention.

FIG. 7 is a timing diagram illustrating in detail a sustain period of a third subfield illustrated in FIGS. 5 to 6.

8 is a graph showing the relationship between the total sustain period and gradation per unit frame of the present invention.

Explanation of symbols on the main parts of the drawings

Y1, ..., Yn ... scanning electrode lines,

X1, ..., Xn ... holding electrode lines,

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

Vs ... Dielectric potential voltage, Vset ... rising voltage,

Vset + Vs ... Rising Ultra High Voltage, Vnf ... Falling Low Voltage,

Vb ... bias voltage, Vsch ... scan high voltage,

Vscl ... scan low voltage, Va ... address voltage.

The present invention relates to a method of driving a plasma display panel, and more particularly, to reduce power consumption generated in a sustain period of a subfield in which sustain discharge does not occur, and to perform stable discharge in a subfield in which sustain discharge occurs. The present invention relates to a method of driving a plasma display panel.

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.

In order to drive the three-electrode structure, a conventional ADS (Address Display Separation) driving method is generally used, which will be described with reference to FIG. 1.

FIG. 1 illustrates an address display separation driving method for scan electrode lines as an example of a driving method of a plasma display panel.

The 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 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 sequentially assigned to gradation weights of 1, 2, 4, 8, 16, 32, 64, 128. Accordingly, different numbers of sustain pulses may be allocated. In order to obtain luminance of 133 gradations, the discharge cells may be addressed and sustained discharged during the first subfield period, the third subfield period, and the eighth subfield period.

The number of sustain discharges allocated to each subfield may be variably determined through an APC (Automatic Power Control) step for reducing power consumption. In addition, the number of sustain discharges allocated to each subfield can be varied in consideration of gamma characteristics and panel characteristics. For example, the gray scale weight allocated to the fourth subfield may be lowered from 8 to 6, and the gray scale weight allocated to the sixth subfield may be increased from 32 to 34. FIG. In addition, the number of subfields forming one frame can be variously modified according to design specifications.

FIG. 2 is a timing diagram showing driving signals for driving the plasma display panel in the subfields 3 and 4 shown in FIG. 1, and FIG. 3 shows the sustain period of the subfield 3 shown in FIG. Timing diagram. Hereinafter, a description will be given with reference to FIGS. 2 and 3.

In the example of FIG. 1 in which the unit frame is composed of eight subfields, if the gray scale weight of the third subfield SF3 is 4 when the above APC step is not taken into consideration, once the third subfield SF3 is shown in FIG. If the number of sustain pulses of the subfield SF3 is four, and the gray scale weight of the fourth subfield SF4 is eight, the number of sustain pulses of the fourth subfield SF4 is eight.

Although the reset period and the address period of the third subfield are not shown, they are similar to the driving signals applied to the reset period and the address period of the fourth subfield and will be described with reference to the reset period and the address period of the fourth subfield.

In the reset period of the third subfield (not shown), in order to initialize the discharge cells, a rising ramp pulse is applied from the sustain discharge voltage to the scan electrode lines, and a falling ramp pulse is applied from the sustain discharge voltage. The bias voltage is applied to the sustain electrode lines when the falling ramp pulse is applied, and the ground voltage is applied to the address electrode lines. The rising ramp pulse has a rising slope from the sustain discharge voltage and rises by the rising voltage (Vset) to reach the rising maximum voltage (Vset + Vs), and the falling ramp pulse has a falling slope from the sustain discharge voltage and falls down to the lowest voltage ( Vnf). When the rising ramp pulse is applied, negative wall charges begin to accumulate in the vicinity of the scan electrodes in the discharge cells, and a weak discharge occurs. When the falling ramp pulse is applied, the negative wall charges accumulated near the scan electrodes in the discharge cells are erased. As it starts to be generated, a weak discharge is generated again, and the wall drop in the discharge cell is initialized.

In the address period (not shown) of the third subfield, a scan pulse having a scan low voltage is sequentially applied while maintaining a scan high voltage on the scan electrode lines. Here, assuming that sustain discharge is not performed in the third subfield, a signal having no information should be applied to the display data signal applied to the address electrode lines. Therefore, it is assumed that ground voltage is applied to the address electrode lines. The bias voltage is continuously applied to the scan electrode lines.

In the sustain period (time t1 to time t11) of the third subfield, scan pulses are alternately applied to the scan electrode lines Y1, ..., Yn and the sustain electrode lines X1, ..., Xn. , The number of holding pulses is four. Ground voltages are applied to the address electrode lines A1, ..., Am. Since addressing is not performed to the address electrode lines of the third subfield once, the sustain discharge does not occur even though the sustain pulse is applied in the sustain period PS of the third subfield SF3. However, since the sustain pulse is continuously applied, a problem arises in that invalid power consumption occurs.

In the reset period PR of the fourth subfield SF4, the rising ramp pulse and the falling ramp pulse are applied in the same manner as the reset period of the third subfield. The rising ramp pulse has a rising slope at the sustain discharge voltage (Vs) and rises by the rising voltage (Vset) to finally reach the rising maximum voltage (Vset + Vs), and the falling ramp pulse has a falling slope and finally falls The lowest voltage Vnf is reached. The address period PA of the fourth subfield SF4 is different from the address period of the third subfield, assuming that addressing is performed to select a cell to be turned on, the scan electrode lines Y1,..., Yn While maintaining the scan high voltage Vsch, scan pulses having the scan low voltage Vscl are sequentially applied, and address voltages (A1, ..., Am) corresponding to the scan pulse are applied to the address electrode lines A1, ..., Am. A display data signal with Va) is applied and addressing is performed. The bias voltage Vb is applied to the sustain electrode lines X1,..., Xn.

In the sustain period PS of the fourth subfield SF4, the sustain pulse is applied to the scan electrode lines Y1, ..., Yn and the sustain electrode lines X1, ..., Xn, and the sustain pulse. The number of is eight according to the gray scale weight, and eight sustain discharges are performed in the addressed discharge cells to display the gray scale.

4 is a graph showing a relationship between a total sustain period and a gray level in a conventional unit frame.

If the applied time of the unit frame is 1/60 second when 256 sub-frames are composed of 8 sub-fields per unit frame, the actual holding period for each frame from 0 to 255 gradations is the straight line A. Will be proportional together. However, even if any gray scale is expressed in the unit frame, since the reset period and the address period are constant periods regardless of each subfield, the total sustain period per unit frame becomes constant as shown in the drawing. Accordingly, reactive power is consumed as in area B in the drawing. This means that the lower the gradation, the more the application of the sustain pulse that is not related to the sustain discharge than the high gradation, resulting in a higher reactive power consumption.

In order to solve the above problems, the present invention provides a plasma display panel which reduces power consumption generated in a sustain period in a subfield in which sustain discharge does not occur, and enables stable discharge to be performed in a subfield in which sustain discharge occurs. It is an object to provide a driving method.

In order to achieve the above object, according to the present invention, the scan electrode lines and the sustain electrode lines extend in parallel, and the address electrode lines extend to cross the scan electrode lines and the sustain electrode lines so that the discharge cells are partitioned. For the plasma panel, for gray scale display of the unit frame representing the image, the unit frame is composed of a plurality of subfields, each subfield having a reset period for initializing the discharge cells and a discharge cell to be turned on. In the driving method of the plasma display panel is configured by the address period and the sustain period in which the sustain discharge is performed according to the gray scale weight for each subfield in the selected discharge cell,

 A high level voltage is applied to the scan electrode lines and the sustain electrode lines in the sustain period of the predetermined subfields in which the sustain discharge is not performed, and the sustain period of the predetermined subfields is the predetermined period. To provide.

According to still another feature of the present invention, it is preferable that the predetermined period is shorter than the sustain period when sustain discharge is performed in the predetermined subfields.

According to another aspect of the present invention, the reset period in the subfields in which the sustain discharge is performed is preferably longer than the reset period of the predetermined subfields.

According to another aspect of the present invention, it is preferable that the address period in the subfields in which the sustain discharge is performed is longer than the address period of the predetermined subfields.

According to another aspect of the present invention, the high level voltage may be a sustain discharge voltage.

The present invention also provides a recording medium having recorded thereon a program for executing the above method of driving the plasma display panel on a computer in order to achieve the above object.

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

5 is a timing diagram illustrating driving signals in a third subfield and a fourth subfield, as an example of a method of driving the plasma display panel of the present invention, and FIG. 7 is a sustain period of the third subfield shown in FIG. This is a timing diagram showing the details. Hereinafter, a description will be given with reference to FIGS. 5 and 7.

According to the present invention, a high level voltage is applied to the scan electrode lines and the sustain electrode lines in the sustain period of the predetermined subfields in which sustain discharge is not performed, and the sustain period of the predetermined subfields in which the sustain discharge is not performed is determined as a predetermined period. The predetermined period is determined such that the sustain period in the predetermined subfield where no sustain discharge is performed is shorter than the sustain period when the sustain discharge is performed. That is, it is characterized in that it is further allocated to the reset period or the address period of the subfield in which sustain discharge is to be performed.

First, it is assumed that eight subfields of a unit frame, and gray scale weights from the first subfield to the eighth subfield are 1, 2, 4, 8, 16, 32, 64, 128 respectively for gray scale display of the unit frame. Assume that Of course, the number of subfields of a unit frame is not limited to eight, and the gray scale weight can also be determined differently from the above.

FIG. 5 shows the sustain period PS of the third subfield SF3, the reset PR, the address PA and the sustain period PS of the fourth subfield SF4. It is assumed that the third subfield SF3 is a predetermined subfield in which sustain discharge is not performed, and it is assumed that sustain discharge is performed in the fourth subfield SF4. That is, in the address period (not shown) of the third subfield, the discharge cells to be turned on are not selected because addressing is not performed, and the discharge cells to be turned on by the addressing are selected in the address period of the fourth subfield. can see.

Therefore, since the sustain discharge is not performed even when the sustain pulse is applied in the sustain period of the third subfield, the sustain electrode lines X1,. A high level voltage is applied to Xn and the scan electrode lines Y1, ..., Yn. The voltage at the high level is preferably the sustain discharge voltage Vs to simplify the power supply level. In the sustain period of the third subfield, a sustain discharge does not occur because a high level voltage is applied to the scan electrode lines Y1, ..., Yn and the sustain electrode lines X1, ..., Xn. If the sustain discharge does not occur during the sustain period of the third subfield in another frame since the four sustain pulses do not have to be applied according to the gray scale weight assigned to the third subfield, Shorter than the sustain discharge period of the sustain pulse). In comparison with FIG. 2, the sustain period of the third subfield of FIG. 2 is applied to four sustain pulses although the sustain discharge is not performed, but the sustain period is from time t1 to time t11. In the sustain period of the three subfields, no sustain discharge is performed, and a high level voltage is applied to the sustain electrode lines X1, ..., Xn and the scan electrode lines Y1, ..., Yn. It is possible to shorten the holding period to a period from time t1 to time t21. This period can be variously determined as a predetermined period in the present invention. However, if there is another subfield in which the sustain discharge does not occur in the unit frame other than the third subfield SF3, the sustain period of the subfield is similarly determined to be a predetermined period (period corresponding to time t1 to time t21). It is preferable. That is, although not shown in Fig. 5, if no sustain discharge occurs in the fifth subfield, the sustain period in the fifth subfield is also set to a predetermined period (period corresponding to time t1 to time t21), and during the predetermined period. A high level voltage, that is, a sustain discharge voltage Vs, may be applied to the scan electrode lines Y1,..., Yn and the sustain electrode lines. In the sustain period in which no sustain discharge occurs, a high level voltage is applied without applying a sustain pulse, and the sustain period is also shortened, thereby reducing the reactive power consumption.

On the other hand, compared with FIG. 2, the period shortened in the sustain period PS of the third subfield SF3 may be further allocated to the reset period PR of the fourth subfield SF4. The reset period (period from time t21 to time t22) is a period for initializing the discharge cells, and applies a rising ramp pulse and a falling ramp pulse to the scan electrode lines.

At this time, the rising slope or the falling slope of the rising ramp pulse and the falling ramp pulse is smaller than the conventional slope shown in FIG. 2 to lengthen the time to reach the rising maximum voltage (Vset + Vs) or the falling minimum voltage (Vnf). Further, the discharge generated when the charge is accumulated or erased in the vicinity of the scan electrode is made weaker. Therefore, the wall charge state of all the discharge cells can be more evenly distributed than in the prior art, and due to the reset discharge in the conventionally incomplete reset period, unintentional sustain discharge in the discharge cells where addressing is not performed (this is incorrectly discharged) This is less likely to occur.

The rising ramp pulse has a rising slope at the sustain discharge voltage Vs and rises by the rising voltage Vset to finally reach the rising maximum voltage Vset + Vs, and the falling ramp pulse at the sustain discharge voltage Vs. It has a falling slope and descends to finally reach the lowest falling voltage (Vnf). The positive bias voltage Vb is applied to the sustain electrode lines X1, ..., Xn from when the falling ramp pulse is applied, and the ground voltage is applied to the address electrode lines A1, ..., Am. (Vg) is applied.

In the address period (time t22 to time t2) of the fourth subfield SF4, since the discharge cells to be turned on by the addressing should be selected, scan electrode lines Y1,. While maintaining the scan high voltage Vsch, scan pulses having the scan low voltage Vscl are sequentially applied, and the address voltage Va is applied to the address electrode lines A1, ..., Am in accordance with the scan pulse. A display data signal is applied. The bias voltage Vb is subsequently applied to the sustain electrode lines X1, ..., Xn.

In the sustain discharge period (time t2 to time t3) of the fourth subfield SF4, sustain discharge is performed in the selected discharge cell, and the eight sustain pulses are applied because the gray scale weight is eight. That is, the sustain pulse having the sustain discharge voltage Vs and the ground voltage Vg alternates with the scan electrode lines Y1, ..., Yn and the sustain electrode lines X1, ..., Xn. 8 maintenance discharges are performed, and 8 gray scales are displayed.

FIG. 6 is a timing diagram illustrating driving signals in a third subfield and a fourth subfield as another example of the method of driving the plasma display panel of the present invention. FIG. 7 is a view illustrating the third subfield shown in FIG. A timing chart showing the period in detail. Hereinafter, a description will be given with reference to FIGS. 6 and 7.

6 shows the sustain period PS of the third subfield SF3, the reset PR, the address PA and the sustain period PS of the fourth subfield SF4. It is assumed that the third subfield SF3 is a predetermined subfield in which sustain discharge is not performed, and it is assumed that sustain discharge is performed in the fourth subfield SF4. That is, in the address period (not shown) of the third subfield, the discharge cells to be turned on are not selected because addressing is not performed. In the address period PA of the fourth subfield SF4, addressing is performed and turned on. It can be seen that the discharge cell to be selected. Therefore, since the sustain discharge is not performed even when the sustain pulse is applied in the sustain period PS of the third subfield SF3, the sustain electrode as shown in FIG. 6 for reducing the reactive power consumption as compared with the conventional FIG. 2. High-level voltages are applied to the lines X1, ..., Xn and the scan electrode lines Y1, ..., Yn. The voltage at the high level is preferably the sustain discharge voltage Vs to simplify the power supply level. In the sustain period PS of the third subfield, a high level voltage is applied to the scan electrode lines Y1, ..., Yn and the sustain electrode lines X1, ..., Xn to sustain discharge. This period does not occur, and it is not necessary to apply the four sustain pulses according to the gradation weights assigned to the third subfield, so that the sustain discharge occurs in the sustain period of the third subfield in another frame. It is preferable to be shorter than the sustain discharge period (when four sustain pulses are applied). Comparing this with FIG. 2, the sustain period of the third subfield of FIG. 2 is applied to four sustain pulses although the sustain discharge is not performed. In the sustain period of the three subfields, since a sustain discharge is not performed, a high level voltage is applied to the sustain electrode lines X1, ..., Xn and the scan electrode lines Y1, ..., Yn. It is possible to shorten the period to a period from time t1 to time t21. This period can be variously determined as a predetermined period in the present invention. However, if there is another subfield in which the sustain discharge does not occur in the unit frame other than the third subfield SF3, the sustain period of the subfield is also set to a predetermined period (period corresponding to time t1 to time t21). It is preferable. That is, although not shown in Fig. 6, if no sustain discharge occurs in the fifth subfield, the sustain period in the fifth subfield is also set to a predetermined period (period corresponding to time t1 to time t21), and during the predetermined period. A high level voltage, that is, a sustain discharge voltage Vs, may be applied to the scan electrode lines Y1,..., Yn and the sustain electrode lines. In the sustain period in which no sustain discharge occurs, a high level voltage is applied without applying a sustain pulse, and the sustain period is also shortened, thereby reducing the reactive power consumption.

The reset period (time t21 to time t32) of the fourth subfield is a period for initializing the discharge cells, and the rising ramp pulse and the falling ramp pulse are applied to the scan electrode lines Y1, ..., Yn. . The rising ramp pulse has a rising slope at the sustain discharge voltage Vs and rises by the rising voltage Vset to finally reach the rising maximum voltage Vset + Vs, and the falling ramp pulse at the sustain discharge voltage Vs. It has a falling slope and descends to finally reach the lowest falling voltage (Vnf). The positive bias voltage Vb is applied to the sustain electrode lines X1,..., And Xn, and the ground voltage () is applied to the address electrode lines A1, ..., Am. Vg) is applied. The application of the rising ramp pulse causes negative wall charges to accumulate in the vicinity of the scan electrode, and a weak discharge occurs. The application of the falling ramp pulse erases the negative wall charge near the scan electrode and generates a weak discharge. It initializes the wall charge state of the discharge cells.

On the other hand, compared with FIG. 2, the period shortened in the sustain period PS of the third subfield SF3 may be further allocated to the address period PA of the fourth subfield SF4.

In the address period (time t32 to time t2) of the fourth subfield SF4, since the discharge cells to be turned on by the addressing should be selected, scan electrode lines Y1,. While maintaining the scan high voltage Vsch, scan pulses having the scan low voltage Vscl are sequentially applied, and the address voltage Va is applied to the address electrode lines A1, ..., Am in accordance with the scan pulse. A display data signal is applied. Compared with the address period of FIG. 2, the address period (from time t32 to time t2) of the fourth subfield of FIG. 6 is further extended by a shortened period in the sustain period of the third subfield. Addressing is a previous step for performing sustain discharge in the sustain period, wherein a discharge cell is selected by the scan pulse and the display data signal to perform address discharge. In a plasma display panel for realizing high image quality, as the scan electrode lines increase for high resolution, the addressing time is shortened, and thus, unstable addressing may be performed. In order to solve this problem, as shown in Fig. 6, the sustain period of the subfield in which sustain discharge does not occur is shortened, and the shortened period is extended to the address period to reduce the pulse width of the scanning pulse and the pulse width of the display data signal. Increase to allow stable addressing. Therefore, low discharge due to unstable addressing does not occur in the sustain period. On the other hand, the bias voltage Vb is continuously applied to the sustain electrode lines X1, ..., Xn.

In the sustain discharge period (time t2 to time t3) of the fourth subfield SF4, sustain discharge is performed in the selected discharge cell, and the eight sustain pulses are applied because the gray scale weight is eight. That is, the sustain pulse having the sustain discharge voltage Vs and the ground voltage Vg alternates with the scan electrode lines Y1, ..., Yn and the sustain electrode lines X1, ..., Xn. 8 maintenance discharges are performed, and 8 gray scales are displayed.

5 and 6, it is assumed that sustain discharge does not occur in the third subfield, and sustain discharge is performed in the fourth subfield. It was described that the high level voltage, that is, the sustain discharge voltage, is applied to the scan electrode lines and the sustain electrode lines for a predetermined period. In addition, it has been described that the reset period of the fourth subfield of FIG. 5 or the address period of the fourth subfield of FIG. 6 is further extended by the shortened period. However, the present invention is not limited thereto, and in order to reduce reactive power consumption in any subfield in which sustain discharge does not occur among subfields of a unit frame, the sustain period may be shortened to a predetermined period to apply a high level voltage. Can be. In addition, the reset period or the address period of another subfield in which sustain discharge is performed may be further extended by the shortened period.

8 is a graph showing the relationship between the total sustain period and gradation per unit frame of the present invention.

In the case of displaying 256 gradations composed of 8 subfields per unit frame, when the application time of the unit frame is 1/60 sec, the sustaining period during which actual sustain discharge is performed for each gradation from 0 to 255 gradations Is proportional to the straight line A as shown in FIG. Conventionally, since the sustain pulse was continuously applied regardless of the sustain discharge, the total sustain period for each gradation was constant, and in the low gradation where the actual sustain discharge occurred, the gradation of the reactive power in the unit frame was high. Was larger than. However, according to the present invention, since the sustain period of the subfield in which sustain discharge does not occur is reduced to a predetermined period and a high level voltage is applied, the total sustain period per unit frame for each gray level is equal to the straight line C, and the reactive power consumed is There will be no.

Meanwhile, the method of driving the plasma display panel according to the present invention described above may be embodied as computer readable codes on a computer readable recording medium. Computer-readable recording media include any type of recording device that stores programs or data that can be read by a computer system. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, hard disk, floppy disk, flash memory, optical data storage, and the like. Here, the program stored in the recording medium refers to a series of instruction instructions used directly or indirectly in an apparatus having an information processing capability such as a computer to obtain a specific result. Therefore, the term computer is used to mean all devices having information processing capability for performing a specific function by a program including a memory, an input / output device, and an arithmetic device despite the fact that the name is actually used. Even in the case of a device for driving a panel, its use is limited to a specific field of panel driving, and in reality, it is a kind of computer.

In particular, the display panel driving method according to the present invention is an integrated circuit, for example, a field programmable gate array (FPGA), which is prepared by a schematic or ultra high-speed integrated circuit hardware description language (VHDL) on a computer, and connected to a computer. It can be implemented by. The recording medium includes such a programmable integrated circuit.

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

First, the driving method of the plasma display panel of the present invention shortens the sustain period of the subfield in which sustain discharge does not occur to a predetermined period, and applies a high level voltage to the scan electrode lines and the sustain electrode lines during the predetermined period. In addition, even when the sustain discharge does not occur in the related art, it is possible to reduce the reactive power generated by applying the sustain pulse to the sustain electrode lines and the scan electrode lines.

Second, by using the sustain period of the subfield in which the sustain discharge shortened to a predetermined period does not occur, assigning the shortened time to the reset period or the address period of another subfield in which the sustain discharge occurs, It prevents erroneous discharge or prevents low discharge during maintenance discharge through stable addressing.

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 (6)

The scan electrode lines and the sustain electrode lines extend side by side, and the address electrode lines extend to intersect the scan electrode lines and the sustain electrode lines to define an image of a unit frame representing an image. For the gray scale display, the unit frame includes a plurality of subfields, each subfield having a reset period for initializing a discharge cell, an address period for selecting a discharge cell to be turned on, and a subfield in the selected discharge cell. In the driving method of the plasma display panel configured to be driven by a sustain period during which the sustain discharge is performed according to the gray scale weight, In the sustain period of the predetermined subfields in which the sustain discharge is not performed, a high level voltage is applied to the scan electrode lines and the sustain electrode lines, and the sustain period of the predetermined subfields is a predetermined period. Driving method. The method of claim 1, wherein the predetermined period of time, And in the predetermined subfields, shorter than a sustain period when the sustain discharge is performed. The method of claim 2, The reset period in the subfields in which sustain discharge is performed is longer than the reset period in the predetermined subfields. The method of claim 2, An address period in subfields in which sustain discharge is performed is longer than an address period in the predetermined subfields. The method of claim 1, wherein the high level voltage, A method of driving a plasma display panel, characterized in that the sustain discharge voltage. A recording medium having recorded thereon a program for executing the method of any one of claims 1 to 5 on a computer.

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