KR101018123B1 - Drive control device of plasma display panel using PPM method - Google Patents

Abstract

The present invention relates to a driving control apparatus for a plasma display panel using a PWM method, the PWM control unit 100 for generating first and second pulse signals (SP1, SP2) of the same phase and consecutive pulses; Selecting a first signal having an odd pulse of the first pulse signal SP1 and a second signal having an even pulse of the second pulse signal SP2 so as not to overlap with a pulse of the first signal. A signal selector 200; A signal transmitter 300 for converting the first signal and the second signal into first and second switching signals SS1 and SS2; And a first primary connected to the input DC voltage terminal in series and alternately switching with each other according to the first and second switching signals SS1 and SS2 to convert the input DC voltage into a pulse voltage. And a primary switching circuit part 10 having second switches S11 and S12.

Description

DRIVE CONTROL APPARATUS OF PDP USING PWM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control apparatus for a plasma display panel that can be applied to a PDP TV. In particular, in a PDP, a primary switching signal for primary switching for converting an input DC voltage into a pulsed voltage using a PWM method is used. The present invention relates to a drive control apparatus for a plasma display panel using a PWM method capable of controlling primary switching.

Recently, the displays that are attracting attention are liquid crystal displays (LCDs) and plasma display panels (PDPs), which have advantages of thin thickness and easy implementation of large screens. There is a need for light weight and small cost.

Generally, PDP TVs include primary switching circuits, transformers, and rectifiers to generate multivoltage (Vm), direct current (DC) sustain voltage (Vs), and address voltage (Va), such as 15V, 5V, and standby voltages. A sustain drive circuit composed of a secondary switching circuit for supplying the panel voltage Vxy required for driving the panel, other drive circuit composed of switches for forming a waveform, and an X buffer unit (holding buffer). Unit), a Y buffer unit (scan buffer unit), an image board, and a PDP panel.

As described above, in order to reduce the cost and light weight of the PDP TV, the PDP TV includes a voltage generation circuit unit which generates a direct current (DC) sustain voltage (Vs) and an address voltage (Va) of the power supply unit, and a sustain driving circuit as one circuit. When implementing an integrated circuit that integrates, a control device capable of controlling the integrated circuit is required.

However, there is a problem that there is no suitable control device capable of controlling the voltage generation circuit section and the integrated circuit integrating the sustain driving circuit into one circuit.

The present invention has been proposed in order to solve the above problems of the prior art, and its object is to use a PWM method for a primary switching signal for primary switching for converting an input DC voltage into a pulsed voltage in a PDP. The present invention provides a driving control apparatus for a plasma display panel using a PWM method capable of controlling primary switching.

A first technical aspect of the present invention for achieving the above object of the present invention, the PWM control unit for generating a first and second pulse signal of the same phase and mutually continuous pulse; A signal selector for selecting a first signal having an odd pulse of the first pulse signal and a second signal having an even pulse of the second pulse signal so as not to overlap with a pulse of the first signal; A signal transfer unit converting the first signal and the second signal into first and second switching signals; And first and second switches connected in series to the input DC voltage terminals and alternately switching to each other according to the first and second switching signals, thereby converting the input DC voltages into pulsed voltages. A drive control apparatus for a plasma display panel using a PWM method including a primary switching circuit unit having the same is proposed.

In addition, in the first technical aspect of the present invention, the driving control apparatus of the plasma display panel of the present invention, the primary coil receiving the pulsed voltage from the primary switching circuit portion, and the pulse type of the primary coil A resonance transformer unit having a secondary coil for converting a voltage into an alternating voltage; Secondary first and second switches connected in series between a sustain voltage terminal and a ground with respect to a first connection node connected to one end of the secondary coil of the resonant transformer part and the other ends of the secondary coil of the resonant transformer part. Secondary third and fourth switches connected in series between the sustain voltage terminal and the ground with respect to the second connection node, and using the AC voltage from the resonant transformer unit of the secondary first to fourth switches A secondary switching / sustain circuit section generating a driving voltage of the PDP panel through a switching operation; And a sustain capacitor for forming a sustain voltage according to the operation of the secondary switching / sustain circuit.

Each of the first and second pulse signals of the PWM controller is increased before the pulse included in the second first to fourth switching signals for the second first to fourth switches is raised. The pulses included in the first to fourth switching signals are polled after being polled.

The PWM control unit generates the first and second pulse signals by using a feedback voltage detected from the voltage of the sustain capacitor and a synchronization signal for secondary switching of the secondary switching / sustain circuit unit. do.

The PWM controller may include: a first comparator configured to generate a difference signal between the feedback voltage and a reference voltage; An oscillator for generating an oscillation signal having a preset frequency; A capacitor charging the oscillation signal of the oscillator; And a switching circuit unit discharging the charging voltage of the capacitor according to the synchronization signal to generate a triangular waveform reference signal. And a second comparator for comparing the difference signal with the reference signal and outputting the first and second pulse signals.

The signal selector selects a first signal having an odd-numbered pulse of the first pulse signal by performing a logical multiplication of a first selection signal and a first pulse signal that are preset to select an odd-numbered pulse of the first pulse signal. A first AND gate; And a second AND for selecting a second signal having an even-numbered pulse of the second pulse signal by performing a logical AND of a predetermined second selection signal and the second pulse signal to select an even-numbered pulse of the second pulse signal. And a gate.

The first selection signal may be synchronized with the rising time of the odd pulse of the first pulse signal, and may be polled after the polling time of the odd pulse of the first pulse signal.

The second selection signal may be synchronized in synchronization with a rising time of an even pulse of the second pulse signal and polled after a polling time of an even pulse of the second pulse signal.

The signal transfer unit may include a primary coil receiving first and second signals from the first and gate, and an electromagnetic coupling with the primary coil to receive the first and second signals from the primary coil. And a transformer including secondary coils for converting primary first and second switching signals, wherein the transformers respectively transmit the primary first and second switching signals through the secondary coils to the primary first and second switching signals. It is characterized by supplying to a 2nd switch.

In addition, a second technical aspect of the present invention is a logic for generating second first to fourth switching signals for generating driving voltage and sustain voltage of a PDP panel, synchronizing signal, and predetermined first and second selection signals. Board section; A PWM controller configured to generate first and second pulse signals having pulses of the same phase and successive to each other; A signal selector for selecting a first signal having an odd pulse of the first pulse signal and a second signal having an even pulse of the second pulse signal so as not to overlap with a pulse of the first signal; A signal transfer unit converting the first signal and the second signal into first and second switching signals; And first and second switches connected in series to the input DC voltage terminals and alternately switching to each other according to the first and second switching signals, thereby converting the input DC voltages into pulsed voltages. A drive control apparatus for a plasma display panel using a PWM method including a primary switching circuit unit having the same is proposed.

In addition, in the second technical aspect of the present invention, a resonance having a primary coil for receiving the pulsed voltage from the primary switching circuit portion, and a secondary coil for converting the pulsed voltage of the primary coil into an alternating voltage Transformer type; Secondary first and second switches connected in series between a sustain voltage terminal and a ground with respect to a first connection node connected to one end of the secondary coil of the resonant transformer part and the other ends of the secondary coil of the resonant transformer part. Secondary third and fourth switches connected in series between the sustain voltage terminal and the ground with respect to the second connection node, and using the AC voltage from the resonant transformer unit of the secondary first to fourth switches A secondary switching / sustain circuit section generating a driving voltage of the PDP panel through a switching operation; And a sustain capacitor for forming a sustain voltage according to the operation of the secondary switching / sustain circuit.

Each of the first and second pulse signals of the PWM controller is increased before the pulse included in the second first to fourth switching signals for the second first to fourth switches is raised. The pulses included in the first to fourth switching signals are polled after being polled.

The PWM control unit generates the first and second pulse signals by using a feedback voltage detected from the voltage of the sustain capacitor and a synchronization signal for secondary switching of the secondary switching / sustain circuit unit. do.

The PWM controller may include: a first comparator configured to generate a difference signal between the feedback voltage and a reference voltage; An oscillator for generating an oscillation signal having a preset frequency; A capacitor charging the oscillation signal of the oscillator; And a switching circuit unit discharging the charging voltage of the capacitor according to the synchronization signal to generate a triangular waveform reference signal. And a second comparator for comparing the difference signal with the reference signal and outputting the first and second pulse signals.

The signal selector selects a first signal having an odd-numbered pulse of the first pulse signal by performing a logical multiplication of a first selection signal and a first pulse signal that are preset to select an odd-numbered pulse of the first pulse signal. A first AND gate; And a second AND for selecting a second signal having an even-numbered pulse of the second pulse signal by performing a logical AND of a second predetermined selection signal and the second pulse signal to select an even-numbered pulse of the second pulse signal. And a gate.

The first selection signal may be synchronized with the rising time of the odd pulse of the first pulse signal, and may be polled after the polling time of the odd pulse of the first pulse signal.

The second selection signal may be synchronized in synchronization with a rising time of an even pulse of the second pulse signal and polled after a polling time of an even pulse of the second pulse signal.

The signal transfer unit may include a primary coil receiving first and second signals from the first and gate, and an electromagnetic coupling with the primary coil to receive the first and second signals from the primary coil. And a transformer including secondary coils for converting primary first and second switching signals, wherein the transformers respectively transmit the primary first and second switching signals through the secondary coils to the primary first and second switching signals. It is characterized by supplying to a 2nd switch.

According to the present invention as described above, in the PDP, the primary switching signal can be controlled by generating a primary switching signal for primary switching for converting an input DC voltage into a pulsed voltage by using a PWM method. (DC) It can be applied to the voltage generation circuit which generates the sustain voltage and the address voltage, and the integrated circuit in which the sustain driving circuit is integrated, and the primary first switch and the second switch are operated with dead time for smooth operation. Can be.

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

The present invention is not limited to the embodiments described, and the embodiments of the present invention are used to assist in understanding the technical spirit of the present invention. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

1 is a circuit block diagram of a driving control apparatus for a plasma display panel according to the present invention. Referring to FIG. PWM control unit 100 for generating first and second pulse signals SP1 and SP2, a first signal having odd-numbered pulses of the first pulse signal SP1, and a pulse of the first signal so as not to overlap. And a signal selector 200 for selecting a second signal having even-numbered pulses of the second pulse signal SP2, and the first and second switching signals SS1, The signal transmission unit 300 for converting to SS2 and the input DC voltage terminal are connected in series with each other, and switching operation is performed alternately with each other according to the first and second switching signals SS1 and SS2, thereby input DC Primary first and second switches S11 and S12 for converting a voltage into a pulsed voltage It includes a primary switching circuit 10 having a).

On the other hand, the driving control apparatus of the plasma display panel of the present invention, the second first to fourth switching signals (S21-S24) for generating the driving voltage (Vxy) and the sustain voltage (Vs) of the PDP panel 40, The logic board unit 50 may generate a synchronization signal Sync and predetermined first and second selection signals SE1 and SE2. Alternatively, the driving control apparatus of the plasma display panel of the present invention may be applied to a plasma display panel including the logic board unit 50.

In addition, the driving control apparatus of the plasma display panel according to the present invention includes a primary coil receiving the pulsed voltage from the primary switching circuit unit 10 and two for converting the pulsed voltage of the primary coil into an alternating voltage. It may include a resonant transformer portion 20 having a difference coil.

In this case, the resonant transformer 20 includes a resonant inductor Lr and a resonant capacitor Cr connected in series with the primary coil. here. The resonant inductor Lr and the resonant capacitor Cr, together with the capacitor of the panel at P, cause resonance in synchronization with the synchronization signal Sync, thereby contributing to the potential change of the PDS panel, which is required by the PDS panel. The formation of the driving voltage Vyx is influenced.

The driving control apparatus of the plasma display panel according to the present invention is connected in series between the sustain voltage (Vs) terminal and the ground with respect to the first connection node (N1) connected to one end of the secondary coil of the resonance type transformer unit (20). Between the first and second switches S21 and S22 connected to each other and the second connection node N2 connected to the other end of the secondary coil of the resonant transformer unit 20, between the sustain voltage Vs terminal and the ground. Second and third switches S23 and S24 connected in series to the second and fourth switches S21 to S24 by using an AC voltage from the resonant transformer unit 20. The switching operation of the PDP panel 40 may include a secondary switching / sustain circuit unit 30 for generating a driving voltage (Vxy).

In addition, the driving control apparatus of the plasma display panel of the present invention may include a sustain capacitor Co for forming a sustain voltage Vs according to the operation of the secondary switching / sustain circuit unit 30.

In this case, the secondary first to fourth switching signals SS21 to SS24, which may be provided by the logic board unit 50, are coupled to the synchronization signals Sync together with the primary switching signals S11 and S12. Therefore, the resonance is caused by the resonance inductor Lr, the resonance capacitor Cr and the capacitor of the PDP panel, and the secondary switches S21-S24 and the primary switches S11 and S12 are synchronized with each other. It operates in synchronization with.

Each of the first and second pulse signals SP1 and SP2 of the PWM controller 100 may include the secondary first to fourth switching signals SS21-for the second to fourth switches S21 to S24. The pulse included in SS24 may be formed before rising, and the pulse included in the secondary first to fourth switching signals SS21 to SS24 may be polled after being polled.

The PWM controller 100 uses a feedback voltage VFB detected at the voltage of the sustain capacitor Co and a synchronization signal Sync for secondary switching of the secondary switching / sustain circuit 30. The first and second pulse signals SP1 and SP2 may be generated.

Here, the present invention may include a feedback circuit unit 60 for detecting the feedback voltage VFB from the voltage of the sustain capacitor Co.

2 is a circuit configuration diagram of the PWM control unit of the present invention.

Referring to FIG. 2, the PWM controller 100 may include a first comparator 110 generating a difference signal F / B between the feedback voltage VFB and a reference voltage, and an oscillation having a preset frequency. The oscillator 120 generating a signal, a capacitor CT charging the oscillation signal of the oscillator 120, and a charging voltage of the capacitor CT in accordance with the synchronization signal Sync to discharge a triangular waveform. The switching circuit unit 130 generating the reference signal SREF and the difference signal F / B of the first comparator 110 and the reference signal SREF are compared to form the first and second pulse signals (SREF). It may include a second comparison unit 140 for outputting the SP1, SP2.

In addition, referring to FIG. 1, the signal selector 200 may include a first selection signal SE1 and a first pulse signal SP1 that are preset to select odd-numbered pulses of the first pulse signal SP1. ) To select the first AND gate 210 for selecting the first signal having the odd pulse of the first pulse signal SP1 and the even pulse of the second pulse signal SP2. The second AND gate 220 for selecting a second signal having even-numbered pulses of the second pulse signal SP2 by performing a logical multiplication on a predetermined second selection signal SE2 and the second pulse signal SP2. It may include.

The first selection signal SE1 is synchronized with the rising time of the odd-numbered pulse of the first pulse signal SP1 and polled after the polling time of the odd-numbered pulse of the first pulse signal SP1. It may be set to.

The second selection signal SE2 is synchronized with the rising time of the even-numbered pulse of the second pulse signal SP2 and polled after the polling time of the even-numbered pulse of the second pulse signal SP2. It may be set to.

The signal transmitter 300 may include a primary coil receiving first and second signals from the first and gate 210, and a first coil from the primary coil in electromagnetic coupling with the primary coil. And a transformer including a secondary coil converting a second signal into the primary first and second switching signals SS1 and SS2.

In this case, the transformer may supply the primary first and second switching signals SS1 and SS2 to the primary first and second switches S11 and S12 through the secondary coil.

3 is an important signal timing chart of the driving control apparatus of the plasma display panel according to the present invention, wherein SS21, SS22, SS23, and SS24 are secondary first to fourth switches S21 to S24 of the secondary switching / sustain circuit section 30; ) Are secondary first to fourth switching signals provided by the logic board unit 50 to control. Sync is a synchronization signal provided from the logic board unit 50. In the SREF, a triangular waveform input to the second comparator 140 of the PWM controller 100 is a reference signal. SP1 and SP2 are first and second pulse signals provided by the logic board unit 50 and synchronized with the synchronization signal Sync. SS11 and SS12 are the primary first of the primary switching circuit unit 10 in the signal transmission unit 300 to control the primary first and second switches S11 and S12 of the primary switching circuit unit 10. The first and second switching signals are provided to the second switches S11 and S12. Vxy is a panel voltage applied to both ends of the panel.

Hereinafter, the operation and effects of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIGS. 1 to 3, a drive control apparatus for a plasma display panel of the present invention will be described first. Referring to FIG. 1, in the drive control apparatus for a plasma display panel of the present invention, the PWM controllers 100 are mutually different. The first and second pulse signals SP1 and SP2 having the same phase and continuous pulses are generated and output to the signal selector 200.

The signal selector 200 may include an even number of the first signal having an odd-numbered pulse of the first pulse signal SP1 and a second pulse signal SP2 so as not to overlap the pulse of the first signal. The second signal having the pulse is selected and output to the signal transmission unit 300.

The signal transmitter 300 converts the first signal and the second signal into primary first and second switching signals SS1 and SS2 and outputs the first and second signals to the primary switching circuit unit 10.

Meanwhile, when the driving control apparatus of the plasma display panel of the present invention includes the logic board unit 50, the logic board unit 50 may include the driving voltage Vxy and the sustain voltage Vs of the PDP panel 40. Secondary first to fourth switching signals S21 to S24 for generation, a synchronization signal Sync, and preset first and second selection signals SE1 and SE2 may be provided.

In the primary switching circuit unit 10, connected to the input DC voltage (VPFC) terminal in series with each other, according to the primary first and second switching signals (SS1, SS2) the first and second switches ( S11 and S12 alternately switch to each other, convert the input DC voltage into a pulsed voltage, and output it to the resonant transformer unit 20.

For example, when the first and second switches S11 and S12 are turned on and off, the input voltage VPFC is supplied to the transformer TF of the resonant transformer unit 20 in the forward direction. When the first and second switches S11 and S12 are turned off and on, current flows in the reverse direction by the energy accumulated in the transformer TF of the resonance type transformer unit 20. By this operation, the input DC voltage can be converted into a pulsed voltage.

Next, the resonant transformer unit 20 converts the pulsed voltage from the primary switching circuit unit 10 input to the primary coil into a secondary voltage by converting the pulsed voltage of the primary coil into an alternating voltage. Output to the secondary switching / sustain circuit section 30 through the coil.

In the secondary switching / sustain circuit section 30, a switching operation of the secondary first to fourth switches S21 to S24, that is, a pair of first using the AC voltage from the resonant transformer section 20, is performed. And a pair of second and third switches S22 and S23 different from the fourth switches S21 and S24 are alternately turned on or off to generate a driving voltage Vxy of the PDP panel 40. .

In addition, the sustain capacitor Co of the present invention forms the sustain voltage Vs according to the operation of the secondary switching / sustain circuit section 30.

Meanwhile, referring to FIGS. 1 to 3, the process of generating the panel voltage Vyx of the PDP panel 40 will be briefly described by dividing the operation mode 0 (M0) to the operation mode 8 (M8). .

First, in the operation mode 0 (M0), the primary first switch S11 is in the on state, the secondary second and third switches SS22 and SS23 are in the on state, and the primary direction of the transformer unit 20 is in the forward direction. As the current increases linearly, energy build-up is performed to increase the panel voltage Vyx, and the sustain capacitor Co is reversed through the second and third switches S22 and S23. A path is formed to be in a discharged state, and the panel voltage Vyx is not yet increased (transformer-panel-sustain capacitor: builder-discharge-hold).

Next, in the operation mode 1 (M1), the primary first switch (S11) is on, the secondary first to fourth switches (SS21-SS24) are all off, and the primary of the transformer unit 20 The linear current increases further linearly, together with the resonance of the panel capacitor and the resonance capacitor Cr in the resonant inductor Lr and P, the panel voltage Vyx is raised, and in the sustain capacitor Co, both are off. The circuit loop is blocked by the secondary first to fourth switches, so that no current flows. At this time, the sustain voltage Vs of the sustain capacitor Co is maintained, and the panel voltage Vyx starts to rise. (Transformer-panel-sustain capacitor: transfer energy-hold-potential change).

Next, in operation mode 2 (M2), the difference from the operation mode 1 is the change of the switching state of the first order, that is, the primary first and second switches S11 and S12 are both off and the primary second switch ( A primary current loop is formed through the body diode of S12, and the forward current decreases at the primary of the transformer unit 20 (since there is no energy source), and at this time, the panel voltage Vyx rises to the highest point ( Transformer-Panel-Sustain Capacitor: Energy Transfer-Maintain- Potential Change).

Next, in the operation mode 3 (M3), the primary second switch S12 is in the on state, the secondary first and fourth switches SS21 and S24 are in the on state, and the primary part of the transformer unit 20 is turned on. The forward current decreases further (because there is no energy source), the panel voltage Vyx reaches the sustain voltage Vs, and in the sustain capacitor Co, the secondary first and fourth switches S21 and S24 are A forward current flows through it, and at this time, the sustain voltage Vs of the sustain capacitor Co is charged and the panel voltage Vyx is maintained at the highest point (transformer-panel-sustain capacitor: energy transfer-charge). -maintain).

Next, in the operation mode 4 (M4), the primary second switch S12 is in the on state, the secondary first and fourth switches SS21 and S24 are in the on state, and the primary portion of the transformer unit 20 is turned on. The reverse current starts to flow, the panel voltage Vyx is maintained while reaching the sustain voltage Vs, and the sustain capacitor Co has reverse current through the secondary first and fourth switches S21 and S24. In this case, the sustain voltage (Vs) of the sustain capacitor (Co) is discharged, and the panel voltage (Vyx) is maintained at the highest point (transformer-panel-sustain capacitor: builder). Up-discharge-maintain).

Next, in the operation mode 5 (M5), the primary second switch (S12) is in the on state, the secondary first to fourth switches (SS21-SS24) are all in the off state, the primary of the transformer unit 20 The reverse current increases further linearly, and together with the resonant inductor Lr and P, the panel capacitor and the resonant capacitor Cr resonate, so that the panel voltage Vyx falls, and both of the sustain capacitor Co are off. No current flows because of separation by the secondary first to fourth switches. At this time, the sustain voltage Vs of the sustain capacitor Co is maintained, and the panel voltage Vyx starts to fall (transformer). -Panel-Sustain Capacitor: Energy Transfer-Maintain-Potential Change).

Next, in operation mode 6 (M6), the difference from the operation mode 5 is the change of the switching state of the first order, that is, the primary first and second switches S11 and S12 are both off and the primary first switch ( A primary current loop is formed through the body diode of S11, and the reverse current is reduced (as an energy source is supplied) to the primary of the transformer unit 20, and at this time, the panel voltage Vyx drops to the lowest point. (Transformer-Panel-Sustain Capacitor: Energy Transfer-Maintain- Potential Change).

Next, in the operation mode 7 (M7), the primary first switch S11 is in the on state, the secondary second and third switches SS22 and SS23 are in the on state, and are reverse to the primary of the transformer unit 20. Energy transfer is performed by linearly decreasing current, and the sustain capacitor Co forms a forward current path through the secondary second and third switches S22 and S23 to be in a charged state, thereby providing the panel voltage Vyx. ) Is the state where the descent stops and remains (transformer-panel-sustain capacitor: energy transfer-charge-sustain).

In operation mode 8 (M8), the primary first switch S11 is in an on state, the secondary second and third switches SS22 and SS23 are in an on state, and the primary direction of the transformer unit 20 is forward. As the current increases linearly, energy build-up is performed to increase the panel voltage Vyx, and the sustain capacitor Co is reversed through the second and third switches S22 and S23. A path is formed to be in a discharged state, and the panel voltage Vyx is not maintained yet. This operation mode 8 is the same operation mode as the operation mode 0, and the operation mode is repeated in this way (transformer-panel-sustain capacitor: builder up-discharge-hold).

For the operation of the primary switching circuit section 10, the resonant transformer section 20, the secondary switching / sustain circuit section 30, and the sustain capacitor Co of the present invention described above, previously described

It is described in detail in Application No. 10-2009-0062944.

Hereinafter, the PWM control unit 100, the signal selection unit 200 and the signal transmission unit 300 of the present invention will be described in more detail.

First, referring to FIG. 2, the first comparator 110 of the PWM controller 100 generates a difference signal F / B between the feedback voltage VFB and a predetermined reference voltage to compare the second. Output to the unit 140. Specifically, the first comparator 110 outputs a difference signal (Vref-VFB = F / B) between the reference voltage Vref inputted to the non-inverting terminal and the feedback voltage VFB inputted to the inverting terminal. .

Meanwhile, the oscillator 120 of the PWM controller 100 generates an oscillation signal having a preset frequency and outputs the oscillation signal to the capacitor CT. The capacitor CT charges the oscillation signal of the oscillator 120.

Next, the switching circuit unit 130 of the PWM controller 100 discharges the charging voltage of the capacitor CT according to the synchronization signal Sync to generate a triangular waveform reference signal SREF to generate the second signal. Output to the comparator 140.

Specifically, when the synchronization signal Sync as shown in FIG. 3 is applied to the base of the transistor Q1 through the resistor R1, the transistor Q1 is turned on, and thus the capacitor CT is turned on. Is charged to ground through the transistor Q1. After the transistor Q1 is turned off, the capacitor CT is charged with a voltage. Through this operation, a triangular waveform reference signal SFRE is generated in the capacitor CT.

Next, the second comparator 140 compares the difference signal F / B of the first comparator 110 and the reference signal SREF to compare the first and second pulse signals SP1,. SP2) is output to the signal selector 200.

Specifically, the second comparison unit 140 compares the difference signal F / B input to the non-inverting terminal and the reference signal SREF input to the inverting terminal, as shown in FIG. 3. When the difference signal F / B is higher than the reference signal SREF, a high level is output. When the difference signal FREF is higher than the difference signal F / B, a low level is output. The first and second pulse signals SP1 and SP2 having successive pulses whose levels are repeated are output.

1 to 3, each of the first and second pulse signals SP1 and SP2 of the PWM controller 100 is a secondary agent for the secondary first to fourth switches S21 to S24. Pulses that are raised before the pulses included in the first to fourth switching signals SS21-SS24 are raised and polled after the pulses included in the secondary first to fourth switching signals SS21-SS24 are polled. It may be made of.

For example, the PWM controller 100 may include a feedback voltage VFB detected from the voltage of the sustain capacitor Co and a synchronization signal for secondary switching of the secondary switching / sustain circuit unit 30. ), The first and second pulse signals SP1 and SP2 may be generated.

In addition, referring to FIG. 1, when the signal selector 200 includes the first and gate 210 and the second and gate 220, the first and gate 210 of the signal selector 200 may be used. Is the logical number of the first selection signal SE1 and the first pulse signal SP1 predetermined to select an odd-numbered pulse of the first pulse signal SP1, and the odd number of the first pulse signal SP1. The first signal having the th pulse can be selected.

In addition, the second AND gate 220 of the signal selector 200 may include a predetermined second selection signal SE2 and the second pulse signal to select even-numbered pulses of the second pulse signal SP2. By multiplying (SP2), a second signal having an even-numbered pulse of the second pulse signal (SP2) can be selected.

On the other hand, the first selection signal SE1 and the second selection signal SE2 are signals for selecting pulses included in the first and second pulse signals SP1 and S21. It may be set to, or may be provided in the logic board unit 50.

In detail, the first selection signal SE1 and the second selection signal SE2 will be described. The first selection signal SE1 may rise the odd-numbered pulses of the first pulse signal SP1. It may be set to be synchronized in time and to be polled after a polling time of an odd-numbered pulse of the first pulse signal SP1.

The second selection signal SE2 is synchronized with the rising time of the even-numbered pulse of the second pulse signal SP2, and after the falling time of the even-numbered pulse of the second pulse signal SP2. Can be set to poll.

In addition, the signal transmission unit 300 may be formed of, for example, a transformer. In this case, the transformer of the signal transmission unit 300 may include the first and the first from the first and gate 210 through the primary coil. Receiving a second signal and converting the first and second switching signals SS1 and SS2 into first and second signals from the primary coil through a secondary coil electromagnetically coupled with the primary coil; To the first and second switches S11 and S12 of the primary switching circuit unit 10.

According to the present invention as described above, the primary switching signal using a PWM method for the voltage generation circuit for generating a direct current (DC) sustain voltage and the address voltage in the PDP and the integrated circuit in which the sustain driving circuit is integrated. It can generate and control the primary switch of the integrated circuit, and in this primary switching operation, having a dead time for a smooth switching operation, there is an effect that the primary switching operation can be made smoothly.

1 is a circuit block diagram of a drive control apparatus for a plasma display panel according to the present invention.

2 is a circuit configuration diagram of a PWM control unit of the present invention.

3 is an important signal timing chart of a drive control device for a plasma display panel of the present invention.

Explanation of symbols on the main parts of the drawings

10: primary switching circuit section 20: resonant transformer section

30: secondary switching / sustain circuit section 40: PDP panel

50: logic board portion 60: feedback circuit portion

100: PWM control section 110; First comparator

120: oscillation unit 130: switching circuit unit

140: second comparator 200: signal selector

210: first and gate 220: second and gate

300: signal transmission CT: capacitor

Co: Sustain Capacitor

Claims (18)

A PWM controller configured to generate first and second pulse signals having pulses of the same phase and successive to each other; A signal selector for selecting a first signal having an odd pulse of the first pulse signal and a second signal having an even pulse of the second pulse signal so as not to overlap with a pulse of the first signal; A signal transfer unit converting the first signal and the second signal into first and second switching signals; And It is connected to the input DC voltage terminal in series with each other, and has a first switch and the first switch to switch the input DC voltage into a pulse type voltage alternately switching with each other according to the first and second switching signal Primary switching circuit section Driving control apparatus for a plasma display panel using a PWM method comprising a. The method of claim 1, A resonant transformer unit having a primary coil receiving the pulsed voltage from the primary switching circuit unit and a secondary coil converting the pulsed voltage of the primary coil into an alternating voltage; Secondary first and second switches connected in series between a sustain voltage terminal and a ground with respect to a first connection node connected to one end of a secondary coil of the resonant transformer part and connected to the other end of the secondary coil of the resonant transformer part. Secondary third and fourth switches connected in series between the sustain voltage terminal and the ground with respect to the second connection node, and using the AC voltage from the resonant transformer unit of the secondary first to fourth switches A secondary switching / sustain circuit section generating a driving voltage of the PDP panel through a switching operation; And Sustain capacitor for forming a sustain voltage according to the operation of the secondary switching / sustain circuit Driving control apparatus for a plasma display panel using a PWM system having a. The method of claim 2, wherein each of the first and second pulse signals of the PWM control unit, After the pulses included in the second first to fourth switching signals for the second first to fourth switches are raised, and the pulses included in the second first to fourth switching signals are polled. Consisting of pulses polled at Driving control apparatus for a plasma display panel using a PWM method characterized in that. The method of claim 3, wherein the PWM control unit, Generating the first and second pulse signals by using a feedback voltage detected at the voltage of the sustain capacitor and a synchronization signal for secondary switching of the secondary switching / sustain circuit portion. A drive control apparatus for a plasma display panel using a PWM method. The method of claim 4, wherein the PWM control unit, A first comparator configured to generate a difference signal between the feedback voltage and a reference voltage; An oscillator for generating an oscillation signal having a preset frequency; A capacitor charging the oscillation signal of the oscillator; And A switching circuit unit configured to discharge a charging voltage of the capacitor according to the synchronization signal to generate a triangular waveform reference signal; And A second comparator for comparing the difference signal with the reference signal and outputting the first and second pulse signals; Driving control apparatus for a plasma display panel using a PWM method characterized in that it comprises a. The method of claim 5, wherein the signal selector, A first AND gate for selecting a first signal having an odd pulse of the first pulse signal by performing a logical AND of a first selection signal and a predetermined first selection signal to select an odd pulse of the first pulse signal ; And A second AND gate for selecting a second signal having an even-numbered pulse of the second pulse signal by performing a logical AND of a predetermined second selection signal and the second pulse signal to select an even-numbered pulse of the second pulse signal; Driving control apparatus for a plasma display panel using a PWM method characterized in that it comprises a. The method of claim 6, wherein the first selection signal, The driving control apparatus of the plasma display panel using the PWM method, characterized in that it is synchronized with the rising time of the odd pulse of the first pulse signal, and polled after the polling time of the odd pulse of the first pulse signal. . The method of claim 7, wherein the second selection signal, The driving control apparatus of the plasma display panel using the PWM method, characterized in that it is synchronized with the rising time of the even-numbered pulse of the second pulse signal, and polled after the polling time of the even-numbered pulse of the second pulse signal. . The method of claim 8, wherein the signal transmission unit, A primary coil receiving first and second signals from the first and gate, and an electromagnetic coupling with the primary coil to receive the first and second signals from the primary coil; 2 consists of a transformer including a secondary coil to convert the switching signal, The transformer supplies the primary first and second switching signals to the primary first and second switches via the secondary coil. Driving control apparatus for a plasma display panel using a PWM method characterized in that. A logic board unit configured to generate secondary first to fourth switching signals for generating driving voltages and sustain voltages of the PDP panel, a synchronization signal, and predetermined first and second selection signals; A PWM controller configured to generate first and second pulse signals having pulses of the same phase and successive to each other; A signal selector for selecting a first signal having an odd pulse of the first pulse signal and a second signal having an even pulse of the second pulse signal so as not to overlap with a pulse of the first signal; A signal transfer unit converting the first signal and the second signal into first and second switching signals; And It is connected to the input DC voltage terminal in series with each other, and has a first switch and the first switch to switch the input DC voltage into a pulse type voltage alternately switching with each other according to the first and second switching signal Primary switching circuit section Driving control apparatus for a plasma display panel using a PWM method comprising a. The method of claim 10, A resonant transformer unit having a primary coil receiving the pulsed voltage from the primary switching circuit unit and a secondary coil converting the pulsed voltage of the primary coil into an alternating voltage; Secondary first and second switches connected in series between a sustain voltage terminal and a ground with respect to a first connection node connected to one end of the secondary coil of the resonant transformer part and the other ends of the secondary coil of the resonant transformer part. Secondary third and fourth switches connected in series between the sustain voltage terminal and the ground with respect to the second connection node, and using the AC voltage from the resonant transformer unit of the secondary first to fourth switches A secondary switching / sustain circuit section generating a driving voltage of the PDP panel through a switching operation; And Sustain capacitor for forming a sustain voltage according to the operation of the secondary switching / sustain circuit Driving control apparatus for a plasma display panel using a PWM system having a. The method of claim 11, wherein the first and second pulse signals of the PWM control unit, After the pulses included in the second first to fourth switching signals for the second first to fourth switches are raised, and the pulses included in the second first to fourth switching signals are polled. Consisting of pulses polled at Driving control apparatus for a plasma display panel using a PWM method characterized in that. The method of claim 12, wherein the PWM control unit, Generating the first and second pulse signals by using a feedback voltage detected from the voltage of the sustain capacitor and a synchronization signal for secondary switching of the secondary switching / sustain circuit portion. A drive control apparatus for a plasma display panel using a PWM method. The method of claim 13, wherein the PWM control unit, A first comparator configured to generate a difference signal between the feedback voltage and a reference voltage; An oscillator for generating an oscillation signal having a preset frequency; A capacitor charging the oscillation signal of the oscillator; And A switching circuit unit configured to discharge a charging voltage of the capacitor according to the synchronization signal to generate a triangular waveform reference signal; And A second comparator for comparing the difference signal with the reference signal and outputting the first and second pulse signals; Drive control apparatus for a plasma display panel using a PWM method comprising a. The method of claim 14, wherein the signal selector, A first AND gate for selecting a first signal having an odd pulse of the first pulse signal by performing a logical AND of a first selection signal and a predetermined first selection signal to select an odd pulse of the first pulse signal ; And A second AND gate for selecting a second signal having an even-numbered pulse of the second pulse signal by performing a logical AND of a predetermined second selection signal and the second pulse signal to select an even-numbered pulse of the second pulse signal; Driving control apparatus for a plasma display panel using a PWM method characterized in that it comprises a. The method of claim 15, wherein the first selection signal, The driving control apparatus of the plasma display panel using the PWM method, characterized in that it is synchronized with the rising time of the odd pulse of the first pulse signal, and polled after the polling time of the odd pulse of the first pulse signal. . The method of claim 16, wherein the second selection signal, The driving control apparatus of the plasma display panel using the PWM method, characterized in that it is synchronized with the rising time of the even-numbered pulse of the second pulse signal, and polled after the polling time of the even-numbered pulse of the second pulse signal. . The method of claim 17, wherein the signal transmission unit, A primary coil receiving first and second signals from the first and gate, and an electromagnetic coupling with the primary coil to receive the first and second signals from the primary coil; 2 consists of a transformer including a secondary coil for converting a switching signal, The transformer supplies the primary first and second switching signals to the primary first and second switches via the secondary coil. Driving control apparatus for a plasma display panel using a PWM method characterized in that.

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