KR20070028842A - Sustain electrode driver of plasma display panel where dc/dc converter is integrated and method for driving sustain electrode - Google Patents

Abstract

A method and an apparatus for driving a sustain electrode of a plasma display panel having an integrated DC/DC converter are provided to stabilize the operation of a plasma display panel and reduce manufacturing cost by simplifying the circuit configuration of a sustain electrode driving device. An apparatus for driving a sustain electrode of a plasma display panel having an integrated DC/DC converter includes a pulse generator(132), a DC/DC transformer(Tr), and a sustain driver(134). The pulse generator generates alternating positive and negative pulses. The transformer receives an output from the pulse generator through a primary coil and induces an output according to a predetermined winding ratio to a secondary coil. The sustain driver is coupled with the sustain electrode and supplies/receives charging/discharging currents for increasing/decreasing a sustain electrode potential during first/third periods, respectively. The sustain driver rectifies the induced voltage from the secondary coil and supplies a positive/negative voltage to the sustain electrode during second/fourth periods, respectively.

Description

SUSTAIN ELECTRODE DRIVER OF PLASMA DISPLAY PANEL WHERE DC / DC CONVERTER IS INTEGRATED AND METHOD FOR DRIVING SUSTAIN ELECTRODE}

1 is a schematic diagram illustrating a panel structure of a typical three-electrode surface discharge AC PDP.

2 is a schematic diagram illustrating a method of driving an AC PDP panel.

3 is a waveform diagram illustrating a driving method during one subfield.

4 is a block diagram schematically illustrating a configuration of a general AC PDP apparatus.

Fig. 5 is a block diagram schematically showing the configuration of a sustain electrode driving apparatus of the prior art.

6 is a diagram showing a circuit configuration of a rectifying unit and a power factor correction unit of a sustain electrode driving apparatus of the related art.

FIG. 7A is a diagram illustrating a configuration of a + Vs side DC / DC converter of the sustain electrode driving apparatus of the related art. FIG.

Fig. 7B is a diagram showing the configuration of the -Vs side DC / DC converter of the sustain electrode driving apparatus of the prior art.

Fig. 8 shows the configuration of the sustain driver of the sustain electrode drive device of the prior art.

9 is a block diagram showing a preferred embodiment of the sustain electrode driving apparatus of the present invention.

10 is a diagram illustrating a configuration of a conversion driver of the sustain electrode driving apparatus of the present invention.

11 is a timing diagram for explaining the circuit operation of the sustain electrode driving apparatus of the present invention.

Fig. 12 shows a preferable relationship between the voltage applied to the transformer primary coil and the panel applied voltage (output) in the sustain electrode driving apparatus of the present invention.

13A illustrates a supply path of a charging current when the first power recovery switch is turned on.

FIG. 13B is a diagram for describing an operation of a circuit when the first driving switch is turned on. FIG.

13C illustrates a recovery path of the discharge current when the second power recovery switch is turned on.

13D is a diagram for describing an operation of a circuit when the second driving switch is turned on.

<Explanation of symbols for the main parts of the drawings>

15: rectification view 20: power factor correction unit

130: conversion drive unit 10: panel

132: pulse generator 134: holding drive unit

136: upper voltage supply unit 138: lower voltage supply unit

142: power recovery drive unit

SQd1, SQd2, SQd3, SQd4: 1st, 2, 3, 4 pulse generation switch

SCd1: blocking capacitor SLd1: first inductor

Tr: transformer SD1, 2: first and second rectifier diodes

Cf1, Cf2: first and second filtering capacitors S1, S2: first and second power recovery switches

D1, D2: first and second power recovery diodes

fD1, fD2: first and second flyback diode panel

SLrc: resonant inductor

Q1, Q2: first and second drive switch

Cp: panel capacitance

The present invention relates to a sustain electrode driving apparatus and a sustain electrode driving method of a plasma display panel, and more particularly, a conventional DC / DC converter and a sustain driver of a plasma display panel (hereinafter referred to as "PDP"). By integrating the circuit, the circuit configuration of the sustain electrode driving device is simplified, and the number of necessary parts is reduced, so that a stable operation of the circuit can be achieved and price competitiveness can be secured by lowering the production cost.

1 is a schematic diagram illustrating a panel structure of a typical three-electrode surface discharge AC PDP. As shown, a typical AC PDP panel includes: a plurality of scan electrodes Y and sustain electrodes X patterned on a flat glass approximately parallel to each other, top dielectric layer 8 covering them, top dielectric layer 8 A top plate 1 comprising a protective layer 9 covering the top; An address electrode A arranged to intersect the scan electrode Y and the storage electrode X, a lower dielectric layer 5 covering the address electrode A to serve as a reflective layer, and a partition wall for distinguishing each cell (3) and a lower plate 2 formed with a fluorescent film 4 applied in parallel with the address electrode A and applied to the side and bottom of the partition 3 to emit visible light.

After evacuating between the bonded upper plate 1 and the lower plate 2, the discharge space defined between the upper plate 1 and the lower plate 2 is a binary or ternary inert gas containing xenon (Xe) gas. Is filled, and a unit discharge cell is formed at a portion where the scan electrode Y and the sustain electrode X of the upper plate 1 and the address electrode A of the lower plate 2 cross each other, and a color image is formed. For display, three cells each of red, green, and blue are combined to form a pixel.

2 illustrates one method used to drive an AC PDP panel. In order to drive the AC PDP panel, as shown in FIG. 2, there are generally a plurality of subfields of different brightness (for example, eight) during one TV field representing a unit image, and each subfield It consists of an initialization period R, an address period (or writing period) W, and a discharge sustain period S. FIG. For example, each of the subfields has a length of discharge sustain periods corresponding to 2 ⁰ , 2 ¹ , 2 ² , 2 ³ , 2 ⁴ , 2 ⁵ , 2 ⁶ , 2 ⁷ , It is possible to express gradations (for example, 256 = 2 ⁸ ) to be implemented in combination.

3 is a waveform diagram illustrating a driving method during the one subfield, respectively. First, the initialization period R serves to make the wall charge states of all cells the same so that subsequent address discharges can occur under the same initial conditions. In addition, in the address period W, in order to select cells to be turned on and cells to be turned off corresponding to the image signal in the discharge sustain period 300 which follows, the scan electrode Y and the address orthogonal to each other in the respective cells are selected. A discharge is generated between the electrodes A to form a desired wall charge. In the subsequent discharge sustain period S, a discharge sustain voltage lower than the discharge start voltage is applied between the scan electrode Y and the sustain electrode X so that sustain discharge is sustained only for the cells ON in the address period. In the address period, a discharge is generated between the scan electrode Y and the address electrode A so that the sustain discharge is generated only in the cell where the wall charge is formed.

4 schematically shows the configuration of the AC PDP apparatus SET. The illustrated AC PDP device SET includes a PDP panel 10, a plurality of sustain electrodes X ₁ , X ₂ , ... X _n formed in the PDP panel 10, and a plurality of scan electrodes Y ₁ ,. Y ₂ , ... Y _n ) and sustain electrode driving device SUS, scan electrode driving device SCN and data electrode driving respectively driving a plurality of address electrodes A ₁ , A ₂ , ... A _n . Device (DAT). In addition, a control unit CNT is provided to control the respective driving devices SUS, SCN, and DAT according to the received image data, and each of the driving devices SUS and SCN is controlled by the control unit CNT. , DAT) operates to fit the drive waveform illustrated in FIG.

Fig. 5 is a block diagram showing the structure of a sustain electrode driving apparatus of the prior art. The conventional sustain electrode driving apparatus includes a rectifier 15 for rectifying and converting an AC input into a direct current, and a power factor compensator for removing a harmonic of the rectified voltage and generating a current in phase with the AC input to improve the power factor ( 20), a + Vs side DC / DC converter 30 for supplying a + Vs DC voltage, a -Vs side DC / DC converter 30 for supplying a -Vs DC voltage, and a sustain driver 50.

6 shows the configuration of the rectifier 15 and the power factor correction unit 20. The rectifier 15 full-wave rectifies an alternating current input through the rectifying diodes Dr1, Dr2, Dr3, and Dr4 arranged in a full bridge shape and stores it in the smoothing capacitor Cr. The power factor correction unit 20 drives the switching element Qpf to induce a current in the power factor correction coil Lpf to control the phase of the current to compensate for the power factor of the circuit. In addition, the power factor correction unit 20 includes a diode Dpf for blocking the reverse current and a capacitor Cpf for providing a DC output voltage.

7A shows the configuration of the + Vs side DC / DC converter 30. The direct current input through the capacitor Cpf is converted into a square wave pulse having alternating polarity through the bridge switch unit 32. The capacitor PCd1 blocks the DC component between the bridge switch unit 32 and the primary coil of the transformer PTr, and the first inductor PLd1 switches each of the switches PQd1 and PQd2 constituting the bridge switch unit 32. , PQd3, PQd4) serves as a resonant coil to mitigate the switching losses.

Referring to the operation of the upper rectifier 34, the first diode PDr1 connected to the first tap H of the transformer PTr secondary coil and the second diode PDr2 connected to the second tap L are 2. The rectified alternating current in the coil is rectified, and the second inductor PLr smoothes the rectified direct current. In addition, the second capacitor PCr connected between the middle tap M of the grounded transformer PTr secondary coil and the output terminal is charged to supply a DC voltage of + Vs through the output terminal.

7B shows the configuration of the -Vs side DC / DC converter 40. The operation of the circuit is the same as that of the + Vs side DC / DC converter 40 of FIG. 7A, except that the operation of the lower rectifier 44 is connected to the first tap H of the secondary coil of the transformer NTr. The first diode NDr1 and the second diode NDr2 connected to the second tap L have opposite polarities to those of the circuit of FIG. 7A, so that the rectified DC has the opposite polarity and the second capacitor NCr has a negative polarity. ) To supply DC voltage of -Vs through the output terminal.

8 shows the configuration of the sustain driver 50. The sustain driver 50 shown includes an energy recovery unit 52, a first drive switch Qrc1, a second drive switch Qrc2, and reflux diodes fD1 and fD2. The illustrated circuit is a single sustainer, and the operation of the sustain driver 50 is described in Korean Patent Laid-Open Publication No. 10-2004-90079.

The first switch Src1 constituting the energy recovery unit 52 of the sustain driver 50 is turned on for the first period T1 to supply the charging current to the panel 10 through the first diode Drc1. At this time, the voltage of the sustain electrode of the panel 10 increases from -Vs to + Vs by the action of the resonance inductor Lrc. After the sustain electrode voltage rises to + Vs, the first switch Src1 is turned off, and the first driving switch Qrc1 is turned on to maintain the voltage of the sustain electrode at + Vs for the second period T2. On the contrary, during the third period T3, the second switch Src2 is turned on, and the sustain electrode voltage drops from + Vs to -Vs by discharge through the resonant inductor Lrc, and during the fourth period T4, the second switch Src2 is turned on. The two drive switch Qrc2 is turned on to maintain the voltage of the sustain electrode at -Vs. The reflux diodes fD1 and fD2 recover the energy accumulated in the resonant inductor Lrc to the power supply side when the first switch Src1 and the second switch Src2 are turned off, thereby contributing to the efficiency increase of the circuit.

The conventional sustain electrode driving apparatus has a problem in that it has a complicated circuit configuration as described above. In order to lower the manufacturing cost of the plasma display apparatus and secure a price competitiveness, the number of components can be further reduced and the circuit can be secured. The need to simplify is urgent.

The present invention is to meet the above requirements, and to simplify the circuit configuration of the sustain electrode driving apparatus to reduce the number of parts, and to achieve a stable operation while lowering the manufacturing cost.

In addition, the present invention eliminates unnecessary circuit configuration on the basis of the analysis of the operation of the sustain electrode circuit of the DC / DC converter and the sustain driver circuit of the prior art, the function of the DC / DC converter and the sustain driver of the prior art It is to propose a more simplified circuit configuration incorporating.

Furthermore, the present invention is to provide a more efficient sustain electrode driving method that can simplify the sustain electrode driving equipment and process of the plasma display panel.

In order to achieve the above object, the sustain electrode driving apparatus of the plasma display panel according to the first aspect of the present invention includes: a pulse generator 132 for generating alternating positive and negative pulses; A transformer (Tr) receiving the output of the pulse generator 132 as a primary coil and inducing an output according to a predetermined turns ratio to the secondary coil; And a charge / discharge through a resonant inductor SLrc coupled to the sustain electrode and for increasing / falling the sustain electrode potential during the first period T1 / third period T3 of one period for driving the sustain electrode. Supplying / recovering a current, rectifying the voltage induced in the transformer (Tr) secondary coil to convert the positive / negative voltage into a second period following the first period (T1) / third period (T3) And a sustain driver 134 for supplying to the sustain electrode during the T2) / fourth period T4, wherein the functions of the DC / DC converter and the single sustainer are integrated.

Here, the alternating positive and negative pulses generated by the pulse generator 132 may be waveforms having the same frequency as the sustain electrode driving frequency.

In addition, if necessary, the alternating positive and negative pulse waveforms generated by the pulse generator 132 may be waveforms delayed by a predetermined phase difference with respect to the time-varying waveform of the sustain electrode potential.

In this case, the phase difference is determined according to the LC resonance period due to the resonance inductor SLrc and the panel capacitance Cp, and preferably may be 1/2 of the resonance period.

A sustain electrode driving method of a plasma display panel according to a second aspect of the present invention comprises the steps of: generating alternating positive and negative pulse waveforms synchronized with the sustain electrode driving waveform; Inputting the generated pulse waveform to a primary coil of a transformer and inducing an output according to a predetermined turns ratio to a secondary coil; Rectifying the voltage induced in the secondary coil and outputting the positive / negative voltage to the first line QH / second line QL, respectively; And connecting the first line QH / second line QL with a sustain electrode during a period T2 / T4 of at least a part of the sustain electrode driving period, thereby changing the potential of the sustain electrode to the first voltage / second. Maintaining at a voltage.

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

9 is a block diagram schematically showing a configuration of a sustain electrode driving apparatus of a plasma display panel according to a preferred embodiment of the present invention. The sustain electrode driving apparatus illustrated in FIG. 9 includes a rectifier 15, a power factor correction unit 20, and a conversion driver 130. Here, since the rectifier 15 and the power factor correction unit 20 are the same as the above-described conventional circuit, detailed description thereof will be omitted.

The conversion driver 130 has a function of integrating the above-described conventional DC / DC converter and the sustain driver. FIG. 10 illustrates a circuit configuration according to a preferred embodiment of the conversion driver 130. As illustrated, the conversion driver 130 includes a pulse generator 132, a transformer Tr, and a sustain driver 134.

Here, the pulse generator 132 is composed of first, second, third, and fourth pulse generating switches SQd1, SQd2, SQd3, and SQd4 connected in a full bridge form, and are switched by respective switching. A square wave pulse with alternating polarity is formed. Although the pulse generator 132 of FIG. 11 illustrates a full bridge shape, other circuits for generating alternating square wave pulses, such as a half bridge method and a push-pull method, may be replaced. .

Between the pulse generator 132 and the primary coil of the transformer Tr, a blocking capacitor SCd1 and a first inductor SLd1 may be added as necessary to block a DC component and mitigate switching loss.

The voltage generated by the pulse generator 132 and applied to the primary coil of the transformer Tr is a square wave pulse Tr1 having alternate polarities as shown in FIG. 11. Here, the generated pulse waveform Tr1 is characterized in that it has the same frequency in synchronization with the sustain electrode driving voltage waveform (Vp). The first and second driving signals of the first, second, third and fourth pulse generation switches SQd1, SQd2, SQd3, and SQd4 constituting the pulse generator 132 are first and second of the power recovery driver 142. This can be achieved by synchronizing with the drive signals of the power recovery switches S1 and S2 and the first drive switch Q1 and the second drive switch Q2.

The intermediate coil M, the first tap H, and the second tap L are provided in the secondary coil of the transformer Tr. The transformer Tr transfers the voltage applied to the primary coil to the secondary coil according to a predetermined current ratio.

In addition, a sustain driver 134 is provided in the conversion driver 130 of the present embodiment. The sustain driver 134 includes an upper power supply 136, a lower power supply 138, a power recovery driver 142, and a first drive. The driving switch Q1, the second driving switch Q2, and the first and second flyback diodes fD1 and 2 may be formed.

The intermediate tap M provided in the secondary coil of the transformer Tr is connected to the ground potential GND, and the first tap H is connected to the first rectifying diode SD1 provided in the upper voltage supply unit 136. . The first rectifying diode SD1 passes only those of positive polarity among the square wave pulses Tr1 having alternate polarities shown in FIG. 11. A filtering capacitor Cf1 may be provided between the cathode of the first rectifying diode SD1 in the upper voltage supply unit 136 and the base potential GND to filter the harmonic components.

Here, the filtering capacitor Cf smoothes the DC voltage and performs the function of a charge reservoir for supplying the DC current. The first capacitor PCr and the first capacitor PCr of FIG. 7A and 7B are provided. Unlike two capacitors (NCr), it is sufficient to perform the function of filtering harmonics, and the capacity does not need to be large.

In addition, the second tap L of the transformer Tr secondary coil is connected to the second rectifier diode SD2 provided in the lower voltage supply unit 138. The second rectifying diode SD2 passes only those whose polarity is negative among the square wave pulses Tr1 in which the polarities are alternately shown in FIG. 11. A filtering capacitor Cf2 for filtering harmonic components may be provided between the anode of the second rectifying diode SD2 in the lower voltage supply unit 138 and the base potential GND. As described above, the capacitance of the filtering capacitor may be provided. Unlike the prior art smoothing capacitor, it does not have to be very large.

The power recovery driver 142 is connected between the ground potential GND and the panel 10, and the first and second power recovery switches S1 and S2 for supplying a charge / discharge current to the panel, and during charge / discharge First and second power recovery diodes D1 and D2 for controlling the direction of the current, and a resonance inductor SLrc which causes LC resonance to cause the panel potential Vp to rise and fall above the ground potential GND.

Hereinafter, the operation of the holding driver 134 of the embodiment will be described with reference to FIGS. 11, 13A, b, c, and d. 11 shows the voltage waveform Tr1 applied to the transformer Tr primary coil, the output voltage QH of the upper voltage supply unit 136, the output voltage QL of the lower voltage supply unit 138, and the panel 10. The applied voltage Vp, the current I (SLrc) flowing through the resonant inductor, the drive signal of the first power recovery switch S1, the drive signal of the first drive switch Q1, and the second power recovery switch S2. And a drive signal of the second drive switch Q2 are respectively shown.

When the first period T1 starts, the potential Vp of the sustain electrode of the panel 10 is -Vs, and during the first period T1, the first power recovery switch S1 is turned on, so that the panel 10 Charging current is supplied to the sustain electrode. 13A shows a current path at the time of charging current supply. At this time, the potential at the point Vp rises higher than the base potential GND due to the action of the resonance inductor SLrc, and the potential at the point Vp rises from -Vs to + Vs. Since the first driving switch Q1 and the second driving switch Q2 are not turned on during the first period T1, the upper voltage supply part 136 and the lower voltage supply part 138 are separated from the sustain electrode, respectively.

As shown in FIG. 13B, during the second period T2, since the first drive switch Q2 is turned on and the potential of the panel 10 must be maintained at + Vs, the continuous supply of the + Vs voltage is required. During this period, the upper voltage supply unit 136 rectifies the voltage induced in the secondary coil of the transformer Tr to + Vs to the panel 10 through the first drive switch Q2 as shown in FIG. 11. By supplying a voltage of, the power required for sustain discharge is supplied.

Subsequently, during the third period T3, as illustrated in FIG. 13C, the second power recovery switch S2 is turned on so that the discharge current from the panel 10 may be caused by the resonance inductor SLrc and the second power recovery diode ( D2) and the second power recovery switch S2 flow to the ground potential GND. By the resonant action of the resonant inductor SLrc, the panel potential Vp drops from + Vs to the base potential GND to -Vs.

At this time, as shown in FIG. 13D, the second power recovery switch S2 is turned off, the second driving switch Q2 is turned on, and the potential of the panel 10 is -Vs during the fourth period T4. Since the supply of the -Vs voltage is required, during this period, the lower voltage supply unit 138 rectifies the induced voltage in the secondary coil of the transformer Tr, thereby providing a second voltage as shown in FIG. The voltage of -Vs is supplied to the panel 10 through the drive switch Q2.

As described through the above embodiments, the sustain electrode driving apparatus of the present invention can perform the same function as the sustain electrode driving apparatus of the related art by a simple circuit configuration which is very efficient. The circuit configurations of the DC / DC converters 30 and 40 and the sustain driver 50 of the prior art shown in FIGS. 7A, 7B, and 8 are compared with those of the conversion driver 130 of FIG. 11 according to the embodiment of the present invention. It will be appreciated that the present invention can further reduce the number of components and simplify the circuit configuration.

In addition, since the first and second filtering capacitors Cf1 and Cf2 included in the upper voltage supply unit 136 and the lower voltage supply unit 138 of the present invention only need to perform a harmonic filtering role, they serve as a smoothing capacitor of a general DC power supply. Smaller capacity ones than prior art capacitors can be used to lower component cost.

Fig. 12 illustrates a preferable relationship between the voltage applied to the transformer primary coil and the panel driving voltage (output) in the sustain electrode driving apparatus of the present invention. As illustrated, the voltage Tr1 waveform generated by the pulse generator 132 and applied to the primary coil of the transformer Tr has a predetermined phase difference with respect to the driving voltage waveform Vp output to the sustain electrode. It is preferable that it is adjusted. This is due to the power recovery during the above-described first period T1 / third period T3, that is, + Vs for sustain discharge in the panel after the charging / discharging process of the panel through the resonant inductor SLrc is completed. The output waveform Tr1 of the pulse generator 132 has a voltage of + Vs / -Vs in accordance with the start time of the second period T2 / fourth period T4, which is the point at which the voltage of -Vs should be supplied. This is because the up / down has to be completed to supply the panel to the panel.

In the example of FIG. 12, the time p1 + p2 corresponds to the LC resonance period by the resonance inductor Lrc and the panel capacitance Cp, and the output waveform Tr1 of the pulse generator 132 is the sustain electrode driving waveform Vp. About half of the resonant period is delayed with respect to.

As described above, the phase adjustment includes the phases of the drive signals of the first, second, third, and fourth pulse generation switches SQd1, SQd2, SQd3, and SQd4 constituting the pulse generator 132. The first and second power recovery switches S1 and S2 of 142 and the driving signals of the first driving switch Q1 and the second driving switch Q2 may be relatively adjusted.

Looking at the technical idea of the present invention from another viewpoint, the following describes a preferred embodiment of the sustain electrode driving method with reference to Figs. 11, 13A, 13B and 13C.

First, the rectified DC voltage is converted into alternating positive and negative pulse waveforms synchronized with the sustain electrode driving waveform. Next, the output positive pulse and the negative pulse train are input to the primary coil of the transformer, and the output according to the predetermined turns ratio is induced in the secondary coil.

The voltage induced in the secondary coil is rectified and the positive / negative voltages are output to the first line QH and the second line QL, respectively.

The first drive switch Q1 / the second drive during at least a portion T2 / T4 of the period in which the voltage of the first line QH / second line QL is maintained at the first voltage / second voltage. The first line QH / second line QL is connected to the sustain electrode by turning on the switch Q2. Therefore, the potential of the sustain electrode is maintained at the first voltage / second voltage during the period in which the first drive switch Q1 / second drive switch Q2 is turned on.

At this time, as described above with reference to FIG. 12, the voltage Tr1 waveform applied to the primary coil of the transformer Tr is adjusted to have a predetermined phase difference with respect to the driving voltage waveform Vp output to the sustain electrode. This is preferred.

The sustain electrode driving apparatus and sustain electrode driving method of the plasma display panel according to the present invention described above can be modified and applied in various forms within the scope of the technical idea of the present invention. For example, it is preferable to use a field effect transistor (FET) as the switching elements described in the embodiment, but if necessary, it can be replaced with other known switching elements, and the specific configuration of each circuit part shown in the embodiment And detailed wiring can also be variously modified. After all, the embodiments and drawings are merely for the purpose of describing the contents of the invention in detail, and are not intended to limit the scope of the technical idea of the invention, the scope of the present invention is not limited to the claims described below, but equivalent to them. It should be judged including the scope.

By applying the sustain electrode driving apparatus of the present invention to the plasma display apparatus, the circuit configuration can be simplified to reduce the number of components, and the stable operation can be realized while lowering the manufacturing cost.

In addition, the present invention simplifies the complicated circuit configuration of the conventional DC / DC converter and the sustain driver circuit, thereby integrating the functions of the DC / DC converter and the sustain driver of the prior art. The circuit configuration of can be provided.

Furthermore, the present invention provides a more efficient sustain electrode driving method that can simplify the sustain electrode driving facility and the process of the plasma display panel.

Claims (13)

A pulse generator for generating alternating positive and negative pulses; A transformer that receives the output of the pulse generator as a primary coil and induces an output according to a predetermined turns ratio to the secondary coil; And A charge / discharge current through a resonant inductor for supplying / recovering the storage electrode potential during the first period / third period of one period for driving the storage electrode, and the transformer 2 And a sustain driver for rectifying the voltage induced in the secondary coil to supply the positive / negative voltage to the sustain electrode for a second period / fourth period following the first period / third period. A sustain electrode driving device for a plasma display panel, wherein the functions of a DC / DC converter and a single sustainer are integrated. The method of claim 1, The alternating positive and negative pulses generated by the pulse generator are waveforms of the same frequency as the sustain electrode driving frequency. The method of claim 2, The alternating positive and negative pulse waveforms generated by the pulse generator are waveforms delayed by a predetermined phase difference with respect to the time-varying waveform of the sustain electrode potential. The method of claim 3, And the phase difference is determined by an LC resonance period caused by the resonance inductor and the panel capacitance. The method of claim 1, The holding drive unit, A power recovery driver for supplying / recovering the charge / discharge current; A first drive switch / second drive switch for switching the first voltage / second voltage supply path to the sustain electrode according to the start of the second period / fourth period; And And an upper power supply / lower power supply for rectifying the voltage induced in the transformer secondary coil to output the first voltage / second voltage during at least the second period / fourth period. Sustain electrode driving device. The method of claim 5, The upper power supply unit / lower power supply unit, A first rectifier diode / a second rectifier is coupled to the anode / cathode to the first tap / second tap of the transformer secondary coil to pass the positive / negative voltage of the voltage transmitted through the transformer secondary coil A sustain electrode driving apparatus of a plasma display panel comprising a diode. The method of claim 6, The upper power supply unit / lower power supply unit, And a first filtering capacitor / second filtering capacitor coupled between the intermediate tap of the transformer secondary coil and the cathode / anode of the first rectifying diode / second rectifying diode and for blocking harmonics. A sustain electrode driving device of a plasma display panel. The method of claim 5, And the first voltage and the second voltage are + Vs / -Vs. Generating alternating positive and negative pulse waveforms synchronized with the sustain electrode drive waveform; Inputting the generated pulse waveform to a primary coil of a transformer and inducing an output according to a predetermined turns ratio to a secondary coil; Rectifying the voltage induced in the secondary coil and outputting a positive / negative voltage to each of the first line and the second line; And Connecting the first line / second line with the sustain electrode during at least a portion of the sustain electrode driving period to maintain the potential of the sustain electrode at the first voltage / second voltage. A sustain electrode driving method of a plasma display panel. The method of claim 9, And the first voltage / second voltage is + Vs / -Vs. The method of claim 9, During the first period / third period before the step of maintaining the potential of the sustain electrode at the first voltage / second voltage, supply / discharge current through the resonant inductor for raising / falling the sustain electrode potential / And recovering the sustain electrodes of the plasma display panel. The method of claim 9, And the alternating positive and negative pulse waveforms are waveforms that are delayed by a predetermined phase difference with respect to the sustain electrode driving waveform. The method of claim 12, And the phase difference is determined by an LC resonance period caused by the resonance inductor and the panel capacitance.

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