KR20060084758A - Driving apparatus and method for plasma display panel - Google Patents

Abstract

The present invention relates to a driving apparatus for a plasma display panel and a driving method thereof. The present invention relates to driving a plasma display panel by efficiently performing sustain discharge by adjusting a sustain pulse voltage applied to a scan electrode and a sustain electrode during a sustain period. The present invention provides a plasma display panel driving apparatus and a driving method thereof to secure a margin, increase driving efficiency of a plasma display panel, and improve brightness of a plasma display panel.

In the driving apparatus of the plasma display panel of the present invention, a plurality of subfields having different emission counts are divided into a reset section, an address section, and a sustain section, and in each section, a predetermined pulse voltage is applied to the scan electrode, the sustain electrode, and the address electrode. In the plasma display panel driving apparatus, during the sustain period, the scan electrode rises from the ground (GND) to the first voltage value (Vs), maintains equilibrium for a predetermined time, and then rises to the second voltage value (Vs + V1). To maintain the constant equilibrium for a certain period of time, and then to the first drive unit for applying a sustain pulse voltage falling to the ground, and to the sustain voltage, which is alternately risen from the ground to the first voltage value for a predetermined period of time. Maintain the balance and then rise to the second voltage value It characterized in that it comprises a second driver for applying a sustain pulse voltage to be lowered.

In the method of driving a plasma display panel according to the present invention, a plurality of subfields having different emission counts are divided into a reset period, an address period, and a sustain period, and a predetermined pulse voltage is applied to the scan electrode, the sustain electrode, and the address electrode in each period. In the method of driving a plasma display panel displaying an image, the sustain pulse voltage applied alternately to the scan electrode and the sustain electrode during the sustain period rises from the ground (GND) to the first voltage value (Vs) to be balanced for a predetermined time. While maintaining the to rise to the second voltage value (Vs + V1) to maintain a constant for a period of time characterized in that the falling to the ground.

Description

Plasma display panel driving apparatus and method {Driving Apparatus and Method for Plasma Display Panel}

1 is a view showing the structure of a typical plasma display panel.

2 is a diagram illustrating a method of expressing image gradation of a conventional plasma display panel.

3 is a view showing a driving waveform of a conventional plasma display panel.

4 is a view showing a driving device of a plasma display panel according to the present invention;

5 is a view showing a driving waveform of the plasma display panel according to the present invention;

The present invention relates to a driving apparatus for a plasma display panel and a driving method thereof, and more particularly, to efficiently perform sustain discharge by adjusting a sustain pulse voltage applied to a scan electrode and a sustain electrode during a sustain period. The present invention relates to a plasma display panel driving apparatus and a driving method thereof to secure driving margins to increase driving efficiency of a plasma display panel and to improve brightness of the plasma display panel.                         

In general, a plasma display panel forms a unit cell with a space between partition walls formed between a front substrate and a rear substrate, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne +). A main discharge gas such as He) and an inert gas containing a small amount of xenon are filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 illustrates a structure of a general plasma display panel. As shown, the plasma display panel is coupled in parallel with the front substrate 100, which is the display surface on which the image is displayed, and the rear substrate 110 forming the rear surface with a predetermined distance therebetween.

The front substrate 100 is a scan electrode 101 (Y electrode) and a sustain electrode 102 (Z electrode), that is, a transparent electrode formed of a transparent ITO material to discharge each other in one discharge cell and maintain light emission of the cell. And the scan electrode 101 and the sustain electrode 102 provided as a bus electrode b made of a metal material are formed in pairs. The scan electrode 101 and the sustain electrode 102 are covered by one or more dielectric layers 103 which limit the discharge current and insulate the electrode pairs, and the magnesium oxide top surface of the dielectric layer 103 to facilitate the discharge conditions. A protective layer 104 on which (MgO) is deposited is formed.

The rear substrate 110 is arranged such that a plurality of discharge spaces, that is, barrier ribs 111 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 112 (X electrodes) for performing address discharge to generate vacuum ultraviolet rays are disposed in parallel with the partition wall 111. On the upper side of the rear substrate 110, R, G, and B phosphors 113 which emit visible light for image display during address discharge are coated. A white dielectric 114 is formed between the address electrode 112 and the phosphor 113 to protect the address electrode 112 and reflect visible light emitted from the phosphor 113 to the front substrate 100.

A method of implementing gray levels of an image in such a plasma display panel is shown in FIG. 2.

2 is a diagram illustrating a method of implementing image grayscale of a conventional plasma display panel. As shown, a gray level display method of a conventional plasma display panel divides one frame into several subfields having different number of emission times, and each subfield has a reset period (RPD) for discharging all cells and a discharge. It is divided into an address period APD for selecting a cell to be used and a sustain period SPD for implementing gray scale according to the number of discharges. For example, when the image is to be displayed with 256 gray levels, a frame period (16.67 ms) corresponding to 1/60 second is divided into eight subfields SF1 to SF8, and eight subfields SF1 to SF8) Each is subdivided into a reset period, an address period and a sustain period.

The reset period and the address period of each subfield are the same for each subfield. The address discharge for selecting the cell to be discharged is caused by the voltage difference between the address electrode and the transparent electrode which is the scan electrode. The sustain period is increased at a rate of 2 ⁿ ( ^where n = 0, 1, 2, 3, 4, 5, 6, 7) in each subfield. In this way, since the sustain period is different in each subfield, the gray scale of the image is expressed by adjusting the sustain period of each subfield, that is, the number of sustain discharges. Looking at the driving voltage according to the driving method of the plasma display panel as shown in FIG.

3 is a diagram illustrating a driving waveform according to a driving method of a conventional plasma display panel.

As shown in FIG. 3, the plasma display panel is driven by being divided into a reset period for initializing all cells, an address period for selecting a cell to be discharged, and a sustain period for maintaining discharge of the selected cell.

In the reset period, the rising ramp voltage is simultaneously applied to all scan electrodes. This rising ramp voltage causes a weak dark discharge within the full discharge cells. By this setup discharge, positive wall charges are accumulated on the address electrode and the sustain electrode, and negative wall charges are accumulated on the scan electrode.

In the set-down period, after the rising ramp voltage is supplied, the falling ramp voltage begins to fall from the positive voltage lower than the peak voltage of the rising ramp voltage and falls to a specific voltage level below the ground (GND) level voltage. By causing the discharge, the wall charges excessively formed on the scan electrodes are sufficiently erased.                         

By this set-down discharge, wall charges such that the address discharge can stably occur remain uniformly in the cells.

In the address period, a negative scan signal is sequentially applied to the scan electrodes, and a positive data signal is applied to the address electrodes in synchronization with the scan signal. As the voltage difference between the scan signal and the data signal and the wall voltage generated in the reset period are added, address discharge is generated in the discharge cell to which the data signal is applied. In the cells selected by the address discharge, wall charges are formed such that a discharge can occur when the sustain voltage Vs is applied. The sustain electrode is supplied with a positive voltage Vzb during the set down period and the address period so as to reduce the voltage difference with the scan electrode so as to prevent erroneous discharge from the scan electrode.

In the sustain period, a sustain signal is alternately applied to the scan electrode and the sustain electrodes. In the cell selected by the address discharge, as the wall voltage and the sustain signal in the cell are added, a sustain discharge, that is, a display discharge occurs between the scan electrode and the sustain electrode every time the sustain signal is applied.

After the sustain discharge is completed, an erase lamp voltage having a small pulse width and a low voltage level is supplied to the Z electrode in the erase period to erase the wall charge remaining in the cells of the full screen.

In this way, the driving process of the plasma display panel in one subfield is completed.

However, when the sophisticated discharge mechanism of the plasma display panel is considered, the driving process of the plasma display panel in one subfield includes various problems. Hereinafter, the problem in the sustain period will be described.

Basically, the sustain pulse voltage is alternately applied to the scan electrode and the sustain electrodes in the sustain period. In the cell selected by the address discharge, the sustain voltage, that is, the display discharge, is generated between the scan electrode and the sustain electrode every time the sustain pulse voltage is applied as the wall voltage and the sustain pulse voltage in the cell are added.

However, in such a sustain discharge, when the wall charge is insufficiently formed during the address discharge, or when the magnitude of the sustain pulse voltage is insufficient, or when the strength of the sustain discharge that finally displays an image due to competition of these factors is insufficient. May occur.

The instability of the sustain discharge lowers the driving margin of the plasma display panel, and lowers the brightness, thereby ultimately damaging the overall quality of the plasma display panel.

This phenomenon is particularly serious when the driving conditions of the plasma display panel are high temperature.

In order to solve this problem, the present invention efficiently sustains discharge by adjusting the sustain pulse voltage applied to the scan electrode and the sustain electrode during the sustain period, thereby securing the driving margin of the plasma display panel and improving the driving efficiency of the plasma display panel. An object of the present invention is to provide a driving apparatus for a plasma display panel and a method of driving the same which increase the brightness of the plasma display panel.

In the plasma display panel driving apparatus of the present invention, a plurality of subfields having different emission counts are divided into a reset period, an address period, and a sustain period, and each of the subfields is predetermined to the scan electrode, the sustain electrode, and the address electrode. In a driving apparatus of a plasma display panel which expresses an image by applying a pulse voltage of 1, a voltage rises from the ground (GND) to the first voltage value (Vs) to the scan electrode during the sustain period, maintains equilibrium for a predetermined time, and then the second voltage value ( Vs + V1) and the first driver for applying a sustain pulse voltage falling to the ground after maintaining a constant balance for a predetermined time, and the first voltage value at ground alternately with the sustain pulse voltage applied to the scan electrode to the sustain electrode. Rises to maintain the equilibrium for a certain time and then rises to the second voltage value After maintaining it is characterized in that a second driver for applying a sustain pulse voltage to be lowered to the ground.

The difference between the second voltage value and the first voltage value is 50 V or more and 100 V or less.

In addition, in the method of driving a plasma display panel according to the present invention, a plurality of subfields having different emission counts are divided into a reset period, an address period, and a sustain period, and a predetermined pulse voltage is applied to the scan electrode, the sustain electrode, and the address electrode in each period. In the method of driving a plasma display panel which expresses an image, a sustain pulse voltage applied alternately to the scan electrode and the sustain electrode during the sustain period rises from the ground (GND) to the first voltage value (Vs) to maintain a constant time balance. After maintaining, the voltage rises to the second voltage value Vs + V1 to maintain equilibrium for a predetermined time, and then descends to the ground.

The difference between the second voltage value and the first voltage value is 50 V or more and 100 V or less.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention;

4 is a view showing a driving device of a plasma display panel according to the present invention.

As shown in FIG. 4, the driving apparatus of the plasma display panel according to the present invention includes a data driver 42 for supplying data to the address electrodes X1 to Xm of the plasma display panel, and the scan electrodes Y1 to Yn. Scan driver 43 for driving the NELTA), a sustain driver 44 for driving the sustain electrode Z as a common electrode, a timing controller 41 for controlling each of the drivers 42, 43, and 44, and each driver And a driving voltage generator 45 for supplying driving voltages to the 42 and 43 and 44.

The data driver 42 is subjected to inverse gamma correction and error diffusion by an inverse gamma correction circuit, an error diffusion circuit, and the like not shown, and then data mapped to a subfield pattern preset by the subfield mapping circuit is supplied. The data driver 42 samples and latches data under the control of the timing controller 41, and then supplies the data to the address electrodes X1 to Xm.

The scan driver 43 rises from the ground (GND) to the first voltage value (Vs) to the scan electrode during the sustain period, which is one of the main components of the present invention, and maintains a constant time for the second voltage value (Vs +). And a first driver 43a for applying a sustain pulse voltage which rises to V1), maintains equilibrium for a predetermined time, and then falls to ground.

The scan driver 43 applies a rising pulse voltage gradually rising to the scan electrodes Y1 to Yn to initialize the full screen during the reset period under the control of the timing controller 41 and then gradually increases the rising pulse voltage following the rising pulse voltage. A falling voltage is applied with a reset voltage that includes a falling pulse voltage.

After the reset voltage is continuously supplied to the scan electrodes Y1 to Yn, the negative scan pulse voltage is sequentially supplied to the scan electrode lines Y1 to Yn during the address period to select the scan electrode line.

In addition, the first driver 43a included in the scan driver 43 rises from the ground GND to the first voltage value Vs at the scan electrode during the sustain period, maintains equilibrium for a predetermined time, and then maintains the second voltage value Vs. After rising to + V1) and maintaining equilibrium for a certain time, apply sustain pulse voltage falling to ground.

This process is described in more detail as follows.

That is, when a pulse voltage rising from the ground GND to the first voltage value Vs by the first driver 43a according to the present invention is applied to the scan electrode during the sustain period, the first cell is generated in the address discharge cell. Sustain discharge occurs.

Subsequently, when a pulse voltage rising from the first voltage value Vs to the second voltage value Vs + V1 is applied for a predetermined time, the second discharge is generated again in the cell in which the first sustain discharge has occurred.

In other words, two sustain discharges are generated by applying one sustain pulse.

In the driving apparatus of the plasma display panel according to the present invention, it is preferable that the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the scan electrode during the sustain period is 50 V or more and 100 V or less. .

The reason for limiting the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the scan electrode during the sustain period is 50 V or more and 100 V or less.

That is, the first sustain discharge occurs in the cell in which the address discharge is generated by applying the first voltage value. Under the wall charge distribution formed by the first sustain discharge, a discharge start voltage of a predetermined level or more is required for the second discharge to occur.

Therefore, the driving apparatus of the plasma display panel according to the present invention generates a second discharge by setting the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the scan electrode during the sustain period to 50 V or more. will be.                     

On the other hand, since the driving efficiency of the driving apparatus of the plasma display panel according to the present invention cannot be considered, the difference between the second voltage value and the first voltage value is set to 100 V or less and applied.

Next, the sustain driver 44 constituting another main part of the driving apparatus of the plasma display panel according to the present invention rises from the ground (GND) to the first voltage value (Vs) to the sustain electrode during the sustain period. The second driver 44a applies a sustain pulse voltage that maintains the time balance, rises to the second voltage value Vs + V1, maintains a constant time balance, and then falls to ground.

The second driver 44a included in the sustain driver 44 rises to the first voltage value Vs at the sustain electrode during the sustain period and rises to the first voltage value Vs to maintain the equilibrium for a predetermined time. After rising to Vs + V1) and maintaining equilibrium for a certain time, apply sustain pulse voltage falling to ground.

This process is described in more detail as follows.

That is, if a pulse voltage rising from the ground GND to the first voltage value Vs is applied to the sustain electrode by the second driver 44a according to the present invention during the sustain period, the first cell is generated in the address discharge cell. Sustain discharge occurs.

Subsequently, when a pulse voltage rising from the first voltage value Vs to the second voltage value Vs + V1 is applied for a predetermined time, the second discharge is generated again in the cell in which the first sustain discharge has occurred.

In other words, two sustain discharges are generated by applying one sustain pulse.

In the driving apparatus of the plasma display panel according to the present invention, it is preferable that the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the sustain electrode during the sustain period is 50 V or more and 100 V or less. .

The reason for limiting the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the sustain electrode during the sustain period is 50 V or more and 100 V or less.

That is, the first sustain discharge occurs in the cell in which the address discharge is generated by applying the first voltage value. Under the wall charge distribution formed by the first sustain discharge, a discharge start voltage of a predetermined level or more is required for the second discharge to occur.

Therefore, the driving apparatus of the plasma display panel according to the present invention generates a second discharge by setting the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the sustain electrode during the sustain period to 50 V or more. will be.

On the other hand, since the driving efficiency of the driving apparatus of the plasma display panel according to the present invention cannot be considered, the difference between the second voltage value and the first voltage value is set to 100 V or less and applied.

The timing controller 41 receives the vertical / horizontal synchronization signal and generates timing control signals CTRX, CTRY, and CTRZ required for each driving unit, and transmits the timing control signals CTRX, CTRY, and CTRZ to the corresponding driving units 42, 43, Each of the driving units 42, 43, and 44 is controlled by supplying to 44. The timing control signal CTRX applied to the data driver 42 includes a sampling clock for sampling data, a latch control signal, a switch control signal for controlling the on / off time of the energy recovery circuit, and the driving switch element. The timing control signal CTRY applied to the scan driver 43 includes a switch control signal for controlling the on / off time of the energy recovery circuit and the drive switch element in the scan driver 43. The timing control signal CTRZ applied to the sustain driver 44 includes a switch control signal for controlling the on / off time of the energy recovery circuit and the drive switch element in the sustain driver 44.

The driving voltage generator 45 may include a setup voltage Vsetup set to a voltage of a rising ramp waveform, a scan reference voltage Vsc supplied to a scan electrode during an address period, a sustain voltage Vs of a sustain pulse, and a data voltage Va. And various driving voltages required by each of the driving units 42, 43, and 44.

Hereinafter, the operation principle of the plasma display panel driving apparatus according to the present invention will be described in more detail with reference to FIG. 5.

5 is a view showing a driving waveform of the plasma display panel driving apparatus according to the present invention.

As shown in FIG. 5, in the driving apparatus of the plasma display panel according to the present invention, the plasma display panel maintains a reset period for initializing all cells, an address period for selecting a cell to be discharged, and discharge of the selected cell. It is driven by being divided into a sustain section to make it work.

First, the rising pulse voltage is gradually applied to the scan electrodes Y1 to Yn to initialize the full screen to all the scan electrodes during the setup period of the reset period, and then gradually decreases during the set down period after the rising pulse voltage. Apply a falling pulse voltage.

This setup voltage causes a weak dark discharge within the full discharge cells. By this setup discharge, positive wall charges are accumulated on the address electrode and the sustain electrode, and a large amount of negative wall charges are accumulated on the scan electrode.

Subsequently, a weak dark discharge occurs again in the discharge cells of the full screen by the set down voltage. By this set down discharge, the excessive amount of negative charge accumulated on the scan electrode is erased to an appropriate level. That is, the wall charges enough to cause the address discharge to stably remain in the cells.

Next, when the positive data pulse voltage is applied to the address electrode in the address period and the negative scan pulse voltage is applied in synchronization with the scan electrode, the voltage difference between the address electrode and the scan electrode and the address electrode due to the wall charge formed during the reset period. The address discharge is generated as the wall voltage between the and scan electrodes is added.

Next, in the sustain period, the first electrode and the second driver of the plasma display panel driving apparatus according to the present invention are supplied to the scan electrode and the sustain electrode, starting from the ground GND, and then rising to the first voltage value Vs. After maintaining a constant time balance, the voltage rises again to the second voltage value Vs + V1, maintains a constant time balance, and alternately applies sustain pulse voltages falling to the ground.

This process is described in more detail as follows.

That is, when a pulse voltage rising from the ground GND to the first voltage value Vs is applied to the scan electrode by the first driver 43a according to the present invention during the sustain period, the first cell is generated in the address discharge cell. Sustain discharge occurs.

Subsequently, when a pulse voltage rising from the first voltage value Vs to the second voltage value Vs + V1 is applied for a predetermined time, the second discharge is generated again in the cell in which the first sustain discharge has occurred.

In other words, two sustain discharges are generated by applying one sustain pulse.

In the driving apparatus of the plasma display panel according to the present invention, it is preferable that the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the scan electrode during the sustain period is 50 V or more and 100 V or less. .

The reason for limiting the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the scan electrode during the sustain period is 50 V or more and 100 V or less.

That is, the first sustain discharge occurs in the cell in which the address discharge is generated by applying the first voltage value. Under the wall charge distribution formed by the first sustain discharge, a discharge start voltage of a predetermined level or more is required for the second discharge to occur.

Therefore, the driving apparatus of the plasma display panel according to the present invention generates a second discharge by setting the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the scan electrode during the sustain period to 50 V or more. will be.

On the other hand, since the driving efficiency of the driving apparatus of the plasma display panel according to the present invention cannot be considered, the difference between the second voltage value and the first voltage value is set to 100 V or less and applied.

In addition, during the sustain period, the sustain electrode alternates with the sustain pulse voltage applied to the scan electrode according to the present invention, starts at ground GND, rises to the first voltage value Vs, and then maintains equilibrium for a predetermined time. Apply sustain pulse voltage that rises to the value (Vs + V1), maintains equilibrium for a certain time, and then falls to ground.

As such, when the pulse voltage rising from the ground GND to the first voltage value Vs is applied by the second driver 44a according to the present invention, the first sustain discharge occurs in the cell in which the address discharge has occurred.

Subsequently, when a pulse voltage rising from the first voltage value Vs to the second voltage value Vs + V1 is applied for a predetermined time, the second discharge is generated again in the cell in which the first sustain discharge has occurred.

In other words, two sustain discharges are generated by applying one sustain pulse.                     

In the driving apparatus of the plasma display panel according to the present invention, it is preferable that the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the sustain electrode during the sustain period is 50 V or more and 100 V or less. .

The reason for limiting the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the sustain electrode during the sustain period is 50 V or more and 100 V or less.

That is, the first sustain discharge occurs in the cell in which the address discharge is generated by applying the first voltage value. Under the wall charge distribution formed by the first sustain discharge, a discharge start voltage of a predetermined level or more is required for the second discharge to occur.

Therefore, the driving apparatus of the plasma display panel according to the present invention generates a second discharge by setting the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the sustain electrode during the sustain period to 50 V or more. will be.

On the other hand, since the driving efficiency of the plasma display panel driving apparatus according to the present invention cannot be considered, the difference between the second voltage value and the first voltage value is set to 100 V or less and applied.

In this way, the driving process of the plasma display panel driving apparatus according to the present invention in one subfield is completed.

As described above in detail, the present invention performs sustain discharge efficiently by adjusting the sustain pulse voltage applied to the scan electrode and the sustain electrode during the sustain period, thereby securing the driving margin of the plasma display panel and driving efficiency of the plasma display panel. The present invention provides a driving apparatus for a plasma display panel that increases the power density and improves the brightness of the plasma display panel.

Hereinafter, a method of driving a plasma display panel according to the present invention will be described in detail with reference to FIG. 5.

5 is a view showing a driving waveform of the plasma display panel driving method according to the present invention.

As shown in FIG. 5, in the method of driving a plasma display panel according to the present invention, the plasma display panel maintains a reset period for initializing all cells, an address period for selecting a cell to be discharged, and discharge of the selected cell. It is driven by being divided into a sustain section to make it work.

First, the rising pulse voltage is gradually applied to the scan electrodes Y1 to Yn to initialize the full screen to all the scan electrodes during the setup period of the reset period, and then gradually decreases during the set down period after the rising pulse voltage. Apply a falling pulse voltage.

This setup voltage causes a weak dark discharge within the full discharge cells. By this setup discharge, positive wall charges are accumulated on the address electrode and the sustain electrode, and a large amount of negative wall charges are accumulated on the scan electrode.                     

Subsequently, a weak dark discharge occurs again in the discharge cells of the full screen by the set down voltage. By this set down discharge, the excessive amount of negative charge accumulated on the scan electrode is erased to an appropriate level. That is, the wall charges enough to cause the address discharge to stably remain in the cells.

Next, when the positive data pulse voltage is applied to the address electrode in the address period and the negative scan pulse voltage is applied in synchronization with the scan electrode, the voltage difference between the address electrode and the scan electrode and the address electrode due to the wall charge formed during the reset period. The address discharge is generated as the wall voltage between the and scan electrodes is added.

Next, in the sustain period, the scan electrode and the sustain electrode start at ground (GND) and rise to the first voltage value (Vs), maintain a constant time balance, and then rise again to the second voltage value (Vs + V1). After maintaining equilibrium, the sustain pulse voltages falling to ground are applied alternately.

This process is described in more detail as follows.

That is, when a pulse voltage rising from the ground GND to the first voltage value Vs is applied to the scan electrode during the sustain period, the first sustain discharge occurs in the cell in which the address discharge has occurred.

Subsequently, when a pulse voltage rising from the first voltage value Vs to the second voltage value Vs + V1 is applied for a predetermined time, the second discharge is generated again in the cell in which the first sustain discharge has occurred.

In other words, two sustain discharges are generated by applying one sustain pulse.

In the method of driving the plasma display panel according to the present invention, the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the scan electrode during the sustain period is preferably 50 V or more and 100 V or less. .

The reason for limiting the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the scan electrode during the sustain period is 50 V or more and 100 V or less.

That is, the first sustain discharge occurs in the cell in which the address discharge is generated by applying the first voltage value. Under the wall charge distribution formed by the first sustain discharge, a discharge start voltage of a predetermined level or more is required for the second discharge to occur.

Therefore, the method of driving the plasma display panel according to the present invention generates a second discharge by setting a difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the scan electrode during the sustain period to 50 V or more. will be.

On the other hand, since the driving efficiency of the method of driving the plasma display panel according to the present invention cannot be considered, the difference between the second voltage value and the first voltage value is set to 100 V or less and applied.

In addition, during the sustain period, the sustain electrode alternates with the sustain pulse voltage applied to the scan electrode according to the present invention, starts at ground GND, rises to the first voltage value Vs, and then maintains equilibrium for a predetermined time. After rising to the value (Vs + V1) and maintaining equilibrium for a certain time, apply sustain pulse voltage falling to ground.

As such, when the pulse voltage rising from the ground GND to the first voltage value Vs is applied by the second driver 44a according to the present invention, the first sustain discharge occurs in the cell in which the address discharge has occurred.

Subsequently, when a pulse voltage rising from the first voltage value Vs to the second voltage value Vs + V1 is applied for a predetermined time, the second discharge is generated again in the cell in which the first sustain discharge has occurred.

In other words, two sustain discharges are generated by applying one sustain pulse.

In the method of driving the plasma display panel according to the present invention, the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the sustain electrode during the sustain period is preferably 50 V or more and 100 V or less. .

The reason for limiting the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the sustain electrode during the sustain period is 50 V or more and 100 V or less.

That is, the first sustain discharge occurs in the cell in which the address discharge is generated by applying the first voltage value. Under the wall charge distribution formed by the first sustain discharge, a discharge start voltage of a predetermined level or more is required for the second discharge to occur.                     

Therefore, the method of driving the plasma display panel according to the present invention generates a second discharge by setting the difference between the second voltage value and the first voltage value of the sustain pulse voltage applied to the sustain electrode during the sustain period to 50 V or more. will be.

On the other hand, since the driving efficiency of the plasma display panel driving method according to the present invention cannot be considered, the difference between the second voltage value and the first voltage value is set to 100 V or less and applied.

In this way, the driving process of the plasma display panel driving method according to the present invention in one subfield is completed.

As described above in detail, the present invention performs sustain discharge efficiently by adjusting the sustain pulse voltage applied to the scan electrode and the sustain electrode during the sustain period, thereby securing the driving margin of the plasma display panel and driving efficiency of the plasma display panel. In addition, the present invention provides a method of driving a plasma display panel to increase the brightness and improve the brightness of the plasma display panel.

As described above, the technical configuration of the present invention described above will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and the like. It should be construed that all changes or modifications derived from the equivalent concept are included in the scope of the present invention.

As described above in detail, the present invention efficiently sustains discharge by adjusting the sustain pulse voltage applied to the scan electrode and the sustain electrode during the sustain period, thereby securing the driving margin of the plasma display panel and driving efficiency of the plasma display panel. The present invention provides a driving apparatus for a plasma display panel and a method of driving the same, which increase the brightness and improve the brightness of the plasma display panel.

Claims (4)

In a driving apparatus of a plasma display panel in which a plurality of subfields having different emission counts are divided into a reset period, an address period, and a sustain period, and a predetermined pulse voltage is applied to the scan electrode, the sustain electrode, and the address electrode in each period to express an image. , During the sustain period A sustain pulse rising from the ground (GND) to the first voltage value (Vs) to maintain the balance for a certain time while rising to the second voltage value (Vs + V1) to maintain the balance for a certain time and then falling to ground. A first driver for applying a voltage; The sustain electrode voltage rises from the ground to the first voltage value alternately with the sustain pulse voltage applied to the scan electrode to maintain the constant equilibrium for a predetermined time, and then rises to the second voltage value to maintain the equilibrium for a predetermined time to ground. And a second driver for applying a falling sustain pulse voltage. The method of claim 1, And the difference between the second voltage value and the first voltage value is 50 V or more and 100 V or less. In a driving method of a plasma display panel in which a plurality of subfields having different emission counts are divided into a reset period, an address period, and a sustain period, and a predetermined pulse voltage is applied to the scan electrode, the sustain electrode, and the address electrode in each period. , During the sustain period The sustain pulse voltage alternately applied to the scan electrode and the sustain electrode rises from the ground GND to the first voltage value Vs to maintain a constant time and then rises to the second voltage value Vs + V1. A method of driving a plasma display panel, characterized by lowering to ground after maintaining time balance. The method of claim 3, wherein And a difference between the second voltage value and the first voltage value is 50 V or more and 100 V or less.

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