JP2000155557A - Pdp drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply a sustain discharge pulse current to a plasma display panel(PDP) in a sustain period without enlarging a circuit scale by electrically applying the output of a sustain discharge driver to the other end of another side switching element when the sustain discharge driver is operated. SOLUTION: An X row electrode driver 3 in the sustain period applies a positive voltage sustain discharge pulse IPx, to an electrode Xj. In a Y row electrode driver 4, the switching element S11 is turned on simultaneously when the sustain discharge pulse IPx disappears, and the switching element S14 is turned off, and by such a operation, the Y row electrode driver 4 applies the positive voltage sustain discharge pulse IPy to the electrode Yj. In such a manner, since the sustain discharge pulse IPx and the sustain discharge pulse IPy are alternately generated to be applied alternately to the electrode Xj, and the electrode Yj, a luminescent discharge cell that a wall charge remains as it is repeats discharge luminescence to sustain its luminescent state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a driving apparatus for a matrix display type plasma display panel (hereinafter, referred to as PDP).

[0002]

2. Description of the Related Art As is well known, various studies have been made on PDPs as thin flat display devices. One of them is a matrix display type PDP. FIG. 1 is a diagram showing a configuration of a PDP driving device including such a PDP. In FIG. 1, a PDP 1 has row electrodes Y _{1 to} Y _n and row electrodes X ₁ to X which form a row electrode pair corresponding to each row (first row to n-th row) of one screen with one pair of X and Y. X _n are formed. Further, the column electrodes D ₁ to D ₁ , which are orthogonal to these row electrode pairs and form column electrodes corresponding to each column (first column to m-th column) of one screen, with a dielectric layer and a discharge space (not shown) interposed therebetween. _Dm is formed. At this time, a discharge cell corresponding to one pixel is formed at the intersection of one row electrode pair and one column electrode.

The address driver 2 converts pixel data for each pixel based on a video signal into a pixel data pulse having a voltage value corresponding to the logical level, and converts the pixel data pulse for each row into the column electrode D _1. It applied to to D _m. The X-row electrode driver 3 generates a reset pulse for initializing the residual wall charge amount of each discharge cell and a sustain discharge pulse for maintaining a discharge light emitting state of the light emitting discharge cell as described later, It applied to the row electrodes X ₁ to X _n.

The Y-row electrode driver 4 is, like the X-row electrode driver 3, a reset pulse for initializing the amount of residual wall charge of each discharge cell, and a maintenance pulse for maintaining the discharge light emitting state of the light emitting discharge cells. the discharge pulse occurs, and applies them to the row electrodes Y ₁ to Y _n. Further, the Y row electrode driver 4
Sets the luminous discharge cell or the non-luminous discharge cell by forming a priming pulse for re-forming charged particles generated in the discharge cell, and forming a charge amount corresponding to the pixel data pulse for each discharge cell. Scan pulse SP for
The generated and applied them to the row electrodes Y ₁ to Y _n.

FIG. 2 shows a specific configuration of the X-row electrode driver 3 and the Y-row electrode driver 4 with respect to the electrode _Xj and the electrode _Yj . The electrode X _j is the electrode of the j-th row of the electrodes X ₁ to X _n, the electrode Y _j is the electrode of the j-th row of the electrodes Y ₁ to Y _n. A portion between the electrodes _Xj and _Yj acts as a capacitor C0. In the X-row electrode driver 3, two power supplies B1 and B2 are provided. Power supply B
1 outputs a voltage V _s1 (for example, 170 V) and a power supply B 2
Outputs a voltage V _r1 (for example, 190 V). Power supply B1
Is connected to the connection line 11 to the electrode _Xj via the switching element S3, and the negative terminal is grounded. The switching element S4 is connected between the connection line 11 and the ground, and the switching element S1,
A series circuit including a diode D1 and a coil L1 and a series circuit including a coil L2, a diode D2, and a switching element S2 are commonly connected via a capacitor C1 to the ground. The diode D1 is connected to the capacitor C1 as an anode, and the diode D2 is connected to the capacitor C1 as a cathode. The positive terminal of the power supply B2 is connected to the connection line 11 via the switching element S8 and the resistor R1, and the negative terminal of the power supply B2 is grounded.

The Y row electrode driver 4 has four power supplies B3 to B6. Power supply B3 is at voltage V
_s1 (for example, 170 V), and the power supply B4 outputs the voltage _Vr1.
(For example, 190 V), and the power supply B5 outputs the voltage V _off
(For example, 140 V), and the power supply B6 outputs the voltage V
_h (for _{example, 160V, V h> V off} ) to output. The positive terminal of the power supply B3 is connected to the connection line 12 to the switching element S15 via the switching element S13, and the negative terminal is grounded. A switching element S14 is connected between the connection line 12 and the ground,
Switching element S11, diode D3 and coil L
4 and a series circuit including a coil L4, a diode D4, and a switching element S12 are commonly connected via a capacitor C2 to the ground side. The diode D3 is connected with the capacitor C2 side as an anode, and the diode D4 is connected with the capacitor C2 side as a cathode.

The connection line 12 is a switching element S15
To the connection line 13 to the positive terminal of the power supply B6. The positive terminal of the power supply B4 is grounded, and the negative terminal is connected to the connection line 13 via the switching element S16 and the resistor R2. The positive terminal of the power supply B5 is connected to the connection line 13 via the switching element S17, and the negative terminal is grounded.

The connection line 13 is connected to a connection line 14 to the electrode _Yj via a switching element S21. The negative terminal of the power supply B6 is connected to the connection line 14 via the switching element S22. Connection line 1
A diode D5 is connected between the switching element S3 and the switching element S14, and a series circuit of the switching element S23 and the diode D6 is connected. The diode D5 is connected with the connection line 14 side as an anode, and the diode D6 is connected with the connection line 14 side as a cathode.

The switching elements S1 to S4, S
8, ON / OFF of S11 to S17 and S21 to S23 is controlled by a control circuit (not shown). The arrow of each switching element in FIG. 2 is a control signal terminal from the control circuit. In the Y-row electrode driver 4, the power supply B3, the switching elements S11 to S15, the coils L3 and L4, the diodes D3 and D4, and the capacitor C2 constitute a sustain driver section, and the power supply B4, the resistor R2 and the switching element S16 constitute a reset driver section. And the remaining power supplies B5, B6, switching elements S13, S17, S2
1, S22 and the diodes D5 and D6 constitute a scan driver unit.

Next, the operation of the PDP driving device having such a configuration will be described with reference to the timing chart of FIG. The operation of the PDP driving device includes a reset period, an address period, and a sustain period. First, in the reset period, the switching element S23 of the Y row electrode driver 4
Turns on. The switching element S23 is turned on during the reset period and the sustain period. At the same time, the switching element S8 of the X-row electrode driver 3 is turned on, and the switching element S16 of the Y-row electrode driver 4 is turned on. Other switching elements are off. When the switching element S8 is turned on, a current flows from the positive terminal of the power supply B2 to the electrode _Xj via the switching element S8 and the resistor R1, and when the switching element S16 is turned on, the diode D5, the resistor R2, and the switching element S16 are discharged from the electrode _Yj. The current flows into the negative terminal of the power supply B4 via the power supply.
Gradually rises and the reset pulse PR _x becomes the time constant of the potential of the electrode X _j and the capacitor C0 and the resistor R1, the reset potential of the electrode Y _j gradually decreases by the time constant of the capacitor C0 and the resistor R2 pulse the PR _y. The reset pulse PR _x is simultaneously applied to all the electrodes X ₁ to X _n, it is applied a reset pulse PR _y even electrodes Y ₁ to Y _n generated for each the electrode Y ₁ to Y _n all at once.

[0011] The simultaneous application of these reset pulses RP _x and RP _y, all the discharge cells of PDP1 discharge excited by charged particles are generated, after the discharge termination uniformly in the dielectric layer of all the discharge cells A predetermined amount of wall charge is formed. After the switching element S8 and a switching element S16, the level of the reset pulse PR _x and PR _y is saturated, turned off in the reset period before the end. At this time, the switching elements S4, S14 and S15 are turned on, and the electrodes X
_j and Y _j are both grounded. Thus the reset pulse PR _x and PR _y disappears.

Next, when the address period starts, the switching elements S14 and S15 are turned off, the switching element S23 is turned off, and the switching element S17 is turned off.
Is turned on, and at the same time, the switching element S22 is turned on. When the switching element S17 is turned on, the power supply B5 and the power supply B6 are connected in series, and a negative potential indicating the difference between the voltages _Vh and _Voff is generated at the negative terminal of the power supply B6.
It is applied to electrode _Yj .

In the address period, the address driver 2
Is a pixel data pulse DP ₁ having a voltage value corresponding to the logic level of pixel data of each pixel based on a video signal.
Convert to to DP _n, which for each row, the column electrodes D ₁ ~
Sequentially applied to D _m. As shown in FIG. 3, the electrodes Y _j , Y _{j + 1}
, Pixel data pulses DP _j and DP _{j + 1} are applied.

The Y-row electrode driver 4 is provided with a positive voltage primer.
Row pulse Y₁~ Y_nAre sequentially applied.
Furthermore, immediately after the application of each priming pulse PP and
The above pixel data pulse group DP₁~ DP_nEach timing
Scan pulse SP of a negative voltage in synchronization with₁~ Y_n
Are sequentially applied. Electrode Y_jTo explain,
When generating the priming pulse PP, the switching
The element S21 is turned on, and the switching element S22 is turned off.
It becomes. Also, the switching element S17 remains on
It is. Thereby, the potential V of the positive terminal of the power supply B5_offBut
Switching element S17 and switching element S21
Through the electrode Y_jApplied as priming pulse PP
Is done. After the application of the priming pulse PP,
Pixel data pulse DP from driver 2_jIn synchronization with the application of
Switching element S21 is turned off,
The element S22 turns on. Thereby, the negative terminal of the power supply B6
Voltage V_hAnd V_offAnd the negative potential indicating the difference between_jScan to
It is applied as a pulse SP. And address dry
Pixel data pulse DP from bus 2_jSynchronous with stop of application of
As a result, the switching element S21 is turned on,
The switching element S22 is turned off, and the potential V of the positive terminal of the power supply B5 is
_offIs the switching element S17 and the switching element
The electrode Y via the child S21_jIs applied to Then the electrodes
Y_{j + 1}As shown in FIG._jAs well as
The liming pulse PP is applied and the address driver 2
Pixel data pulse DP from _{j + 1}Scan in synchronization with the application of
A pulse SP is applied.

In the discharge cells belonging to the row electrodes to which the scan pulse SP has been applied, discharge occurs in the discharge cells to which the pixel data pulse of the positive voltage is further applied at the same time, and most of the wall charges are lost. On the other hand, no discharge occurs in the discharge cells to which the scan pulse SP is applied but the positive voltage pixel data pulse is not applied, so that the wall charges remain. At this time, the discharge cells in which the wall charge remains remain light emitting discharge cells, and the discharge cells in which the wall charge has disappeared become non-light emitting discharge cells.

When switching from the address period to the sustain period, the switching elements S17 and S21 are turned off, and the switching elements S14 and S15 are turned on instead. The ON state of the switching element S4 is continued. In the sustain period, in the X-row electrode driver 3, the potential of the electrode _Xj becomes the ground potential of almost 0 V due to the turning on of the switching element S4. Next, when the switching element S4 is turned off and the switching element S1 is turned on, the charge stored in the capacitor C1 causes the coil L1, the diode D1, and the switching element S1 to turn on.
, The current reaches the electrode _Xj , flows into the capacitor C0, and charges the capacitor C0. At this time, the potential of the electrode _Xj gradually rises as shown in FIG. 3 due to the time constant of the coil L1 and the capacitor C0.

Next, the switching element S1 is turned off and the switching element S3 is turned on. This allows
The electrode X _j potentials V _S1 of the positive terminal of the power source B1 is applied. Thereafter, the switching element S3 is turned off, the switching element S2 is turned on, and the electric charge accumulated in the capacitor C0 causes a current to flow from the electrode _Xj to the capacitor C1 via the coil L2, the diode D2, and the switching element S2. At this time, the potential of the electrode _Xj gradually decreases as shown in FIG. 3 due to the time constant of the coil L2 and the capacitor C1. When the potential of the electrode _Xj reaches almost 0 V, the switching element S2 turns off and the switching element S4 turns on.

[0018] X-row electrode driver 3 by such operation applying the sustain pulses IP _x of the positive voltage such as shown in FIG. 3 to the electrode X _j. Sustain discharge pulse IP _x is simultaneously when the switching element S4 to disappear, Y row electrode driver 4
Then, the switching element S11 is turned on and the switching element S14 is turned off. When the switching element S14 is on, the potential of the electrode _Yj is at a ground potential of almost 0 V. However, when the switching element S14 is off and the switching element S11 is on, the electric charge stored in the capacitor C2 causes The current reaches the electrode _Yj via the coil L3, the diode D3, the switching element S11, the switching element S15, the switching element S13, and the diode D6, and the capacitor C0
To charge the capacitor C0. At this time,
The electrode Y _{j is determined} by the time constant of the coil L3 and the capacitor C0.
The potential gradually rises as shown in FIG.

Next, the switching element S11 is turned off and the switching element S13 is turned on. As a result, the potential V _S1 of the positive terminal of the power supply B3 is applied to the electrode _Yj . Thereafter, the switching element S13 is turned off,
The switching element S12 is turned on, and the capacitor C0
From the electrode _Yj to the diode D5,
Switching element S15, coil L4, diode D
4, and a current flows into the capacitor C2 via the switching element S12. At this time, the potential of the electrode _Yj gradually decreases as shown in FIG. 3 due to the time constant of the coil L4 and the capacitor C2. When the potential of the electrode _Yj reaches almost 0 V, the switching element S12 turns off and the switching element S14 turns on.

The Y-row electrode driver 4 by such operation applying the sustain pulse IP _y of positive voltage such as shown in FIG. 3 to the electrode Y _j. Thus, in the sustain period, since the sustain discharge pulse IP _x and sustain discharge pulse IP _y is alternately applied to the generated electrode X ₁ and to X _n and the electrodes Y ₁ to Y _n are alternately above The light emitting discharge cell in which the wall charge remains remains repeating the discharge light emission and maintains the light emitting state.

[0021]

The above-mentioned conventional PDP
In the driving device, the scan driver unit uses a PMOS-FET or an NMOS as the switching element S21, uses an NMOS-FET as the switching element S22, and connects their connection points to the electrodes Y _j by connecting them in series.
However, in this case, since the ON resistance of the FET constituting the switching element S21 is high, the driving capability thereof is significantly inferior to that of the FET constituting the switching element S22. Therefore,
During the sustain period, the sustain discharge pulse current from the sustain driver section is applied to the electrode Y _j via the switching element S21.
Switching element S1
, The sustain discharge pulse current is set to P
Supply to the DP electrode _Yj is performed, and there is a problem that the circuit scale is increased and the cost is increased.

An object of the present invention is to provide a PDP driving device capable of supplying a sustain discharge pulse current to a PDP during a sustain period without increasing the circuit scale.

[0023]

According to the present invention, there is provided a PDP driving apparatus comprising: a plurality of row electrode pairs; and a plurality of column electrodes which are arranged so as to intersect with the row electrode pairs and form a discharge cell at each intersection. A scan driver for supplying a scan pulse to one of the row electrode pairs for selecting a light emitting cell and a non-light emitting cell, and a row for maintaining light emission only in the light emitting cell. And a sustain driver for supplying a sustain discharge pulse to one of the electrode pairs. The scan driver has two switching elements each having one end commonly connected to one of the row electrode pairs. A first potential is applied to the other end of one of the switching elements, and a second potential lower than the first potential and equal to the potential of the scan pulse is applied to the other end of the two switching elements. Potential is applied, it is characterized in that the output of the sustain driver during operation of the sustain driver is electrically connected to the other end of the other switching elements.

According to the present invention, the sustain discharge pulse output from the sustain discharge driver is supplied to one of the row electrode pairs via the other switching element.

[0025]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 4 shows a PDP according to the present invention.
1 shows the configuration of a driving device, and the same parts as those of the conventional device shown in FIGS. 1 and 2 are denoted by the same reference numerals. In the PDP driving device shown in FIG.
The negative terminal of the power supply B6 is connected to the connection line 13 connected to the power supply B15. The positive terminal of the power supply B6 is connected to the connection line 14 to the electrode _Yj via the switching element S21, and the negative terminal of the power supply B6 connected to the connection line 13 is connected to the connection line 14 via the switching element S22. I have. A diode D5 is connected in parallel with the switching element S21, and a diode D6 is connected in parallel with the switching element S22. The diode D5 has an anode on the connection line 14 side and a diode D5.
6 is connected with the connection line 14 side as a cathode.

The power supply B5 is of the conventional device are connected to the positive and negative terminals reversed 2, for example, the voltage V _{of f,} 1
Generates 0-20V. The other configuration is the same as that of the conventional device shown in FIGS. 1 and 2, and the description is omitted here. Next, the operation of the PDP driving device according to the present invention having such a configuration will be described with reference to the timing chart of FIG. The operation of the PDP driving device is performed during a reset period,
An address period and a sustain period are the same as in the conventional device of FIG.

First, in the reset period, the switching element S8 of the X-row electrode driver 3 turns on, and both the switching elements S16 and S22 of the Y-row electrode driver 4 turn on. Other switching elements are off.
When the switching element S8 is turned on, a current flows from the positive terminal of the power supply B2 to the electrode _Xj via the switching element 8 and the resistor R1, and when the switching elements S16 and S22 are turned on, the electrode _Yj passes from the electrode _Yj to the switching element S22 and the resistor R2.
2. A current flows into the negative terminal of the power supply B4 via the switching element S16. Gradually rises and the reset pulse PR _x becomes the time constant of the potential of the electrode X _j and the capacitor C0 and the resistor R1, the reset potential of the electrode Y _j gradually decreases by the time constant of the capacitor C0 and the resistor R2 pulse P
_Ry . The reset pulse PR _x is finally voltage V _r1, and the reset pulse PR _y becomes final voltage -V _r1. The reset pulse PR _x is simultaneously applied to all the electrodes X ₁ to X _n, the reset pulse PR _y even electrodes Y ₁ to Y _n
It is generated every time and applied simultaneously to all the electrodes Y ₁ to Y _n .

[0028] The simultaneous application of these reset pulses RP _x and RP _y, all the discharge cells of PDP1 is discharge-excited charged particles are generated, after the discharge termination uniformly in the dielectric layer of all the discharge cells A predetermined amount of wall charge is formed. The switching elements S8, S16 and S22 are reset pulses PR
After saturation levels of _x and PR _y, and turned off the reset period ends earlier. At this time, the switching element S
4, S14 and S15 are turned on, and both electrodes _Xj and _Yj are grounded. Thus the reset pulse PR _x and PR _y disappears.

Next, when the address period starts, the switching elements S14 and S15 are turned off, the switching element S17 is turned on, and at the same time, the switching element S22 is turned on. Switching elements S17 and S2
2, the negative potential −V _off of the negative terminal of the power supply B5 is changed to the switching element S17 and the switching element S22.
_Is applied to the electrode _Yj .

In the address period, the address driver 2
Is a pixel data pulse DP ₁ having a voltage value corresponding to the logic level of pixel data of each pixel based on a video signal.
Convert to to DP _n, which for each row, the column electrodes D ₁ ~
Sequentially applied to D _m. As shown in FIG. 5, the electrodes Y _j , Y _{j + 1}
, Pixel data pulses DP _j and DP _{j + 1} are applied.

The Y row electrode driver 4 sequentially applies a positive voltage priming pulse PP to the row electrodes Y _{1 to} Y _n .
Further, immediately after the application of each priming pulse PP and in synchronism with the timing of each of the pixel data pulse groups DP _{1 to} DP _n , the scanning pulse SP of the negative voltage is applied to the row electrodes Y _{1 to} Y _n.
Are sequentially applied. Describing the electrode _Yj , when generating the priming pulse PP, the switching element S21 is turned on and the switching element S22 is turned off. Further, the switching element S17 remains on. As a result, the power supply B6 and the power supply B5 are connected in series via the switching element S17, so that the potential of the positive terminal of the power supply B6 becomes V _h −V _off (for example, 1
40V). This positive potential is the switching element S21
Is applied to the electrode _Yj as a priming pulse PP.

[0032] After the application of the priming pulse PP, the switching element S21 is turned off in synchronization with the application of the pixel data pulse DP _j from the address driver 2, the switching element S22 is turned on. As a result, the negative potential −V _off of the negative terminal of the power supply B5 is applied as a scan pulse SP to the electrode _Yj via the switching element S17 and the switching element S22. And address driver 2
In synchronization with the stop of the application of the pixel data pulse DP _j from the switching element S21 is turned on, the switching element S22 is turned off, the positive terminal of the voltage V _h of the power source B6 -
V _off is applied to the electrode _Yj via the switching element S21. After that, as shown in FIG. 5, a priming pulse PP is applied to the electrode Y _{j + 1} similarly to the electrode Y _j, and the pixel data pulse DP from the address driver 2 is applied.
_The scanning pulse SP is applied in synchronization with the application of _{j + 1} .

In the discharge cells belonging to the row electrodes to which the scan pulse SP has been applied, discharge occurs in the discharge cells to which the pixel data pulse of the positive voltage is further applied at the same time, and most of the wall charges are lost. On the other hand, no discharge occurs in the discharge cells to which the scan pulse SP is applied but the positive voltage pixel data pulse is not applied, so that the wall charges remain. At this time, the discharge cells in which the wall charge remains remain light emitting discharge cells, and the discharge cells in which the wall charge has disappeared become non-light emitting discharge cells.

When switching from the address period to the sustain period, the switching elements S17 and S21 are turned off, and the switching elements S14 and S15 are turned on instead. The ON state of the switching element S4 is continued. The operation of the X-row electrode driver 3 during the sustain period is the same as that of the conventional device shown in FIG. 2, and therefore the description of the operation is omitted, but the X-row electrode driver 3 maintains the positive voltage as shown in FIG. the discharge pulse IP _x applied to the electrodes X _j.

In the Y row electrode driver 4, the sustain discharge pulse
IP_xDisappears when the switching element S4 is turned on.
Then, the switching element S11 is turned on and the switch
The switching element S14 is turned off. Switching element S14
When turned on, the electrode Y _jPotential is almost 0V
Switching element S14 is off
And when the switching element S11 is turned on,
The charge stored in the capacitor C2 causes the coil L3,
Iode D3, switching element S11, switching
The current flows through the element S15 and the diode D6.
Y_jAnd flows into the capacitor C0,
Charge 0. At this time, the coil L3 and the capacitor
The electrode Y is determined by the time constant of C0._jAs shown in FIG.
Gradually rise.

Next, the switching element S11 is turned off and the switching element S13 is turned on. Thus, the potential V _S1 of the positive terminal of the power supply B3 is applied to the electrode _Yj via the switching element S13, the switching element S15, and the diode D6. Thereafter, the switching element S13 is turned off, the switching element S12 is turned on, further switching element S22 is turned on, the switching device S22 from the electrode Y _j by the charge accumulated in the capacitor C0, a switching element S15,
A current flows into the capacitor C2 via the coil L4, the diode D4, and the switching element S12. At this time, the potential of the electrode _Yj gradually decreases as shown in FIG. 5 due to the time constant of the coil L4 and the capacitor C2. When the potential of the electrode _Yj reaches almost 0V, the switching element S
12 and S22 are turned off, and the switching element S14
Turns on.

The Y-row electrode driver 4 by such operation applying the sustain pulse IP _y of positive voltage such as shown in FIG. 5 to the electrode Y _j. Thus, in the sustain period, since the sustain discharge pulse IP _x and sustain discharge pulse IP _y is alternately applied to the generated electrode X ₁ and to X _n and the electrodes Y ₁ to Y _n are alternately above The light emitting discharge cell in which the wall charge remains remains repeating the discharge light emission and maintains the light emitting state.

[0038]

As described above, according to the present invention, the sustain discharge pulse current can be supplied to the PDP during the sustain period without passing through the bypass circuit formed by the switching element, so that the circuit scale is prevented from increasing. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a PDP driving device.

FIG. 2 is a circuit diagram illustrating a configuration of a conventional driving device.

FIG. 3 is a time chart of each part of the apparatus of FIG. 2;

FIG. 4 is a circuit diagram showing an embodiment of the present invention.

FIG. 5 is a time chart of each part of the apparatus of FIG. 4;

[Explanation of symbols]

 1 PDP 2 Address driver 3 X row electrode driver 4 Y row electrode driver

Claims (2)

[Claims] 1. A driving device for driving a plasma display panel having a plurality of row electrode pairs and a plurality of column electrodes arranged to intersect the row electrode pairs and form discharge cells at each intersection. A scan driver that supplies a scan pulse to one of the row electrode pairs to select a light emitting cell and a non-light emitting cell; and a sustain discharge pulse to one of the row electrode pairs to maintain light emission only in the light emitting cells. The scan driver has two switching elements each having one end commonly connected to one of the row electrode pairs. When the scan driver is activated, the scan driver includes two switching elements. A first potential is applied to one of the other switching elements, and the first potential is applied to the other of the two switching elements.
A second potential lower than the potential and equal to the potential of the scan pulse is applied, and an output of the sustain discharge driver is electrically connected to the other end of the other switching element when the sustain discharge driver operates. Plasma display panel driving device. 2. The scan driver includes a P-channel MOS transistor as the one switching element, an N-channel MOS transistor as the other switching element, and a diode connected in parallel to each of the MOS transistors. The plasma display panel driving device according to claim 1, wherein: