KR100775840B1 - Plasma Display Panel Device - Google Patents

Abstract

The present invention relates to a plasma display device, comprising: a pass switch connected between an output terminal of a sustain driver and an input terminal of a scan driver to switch on so that the sustain voltage is supplied to the scan electrode (Y), and supplying a setup voltage. By configuring the circuit, the circuit configuration can be simplified and the cost can be reduced.

Pass switch, variable resistor, diode

Description

Plasma Display Panel Device

1 is a signal diagram showing a driving signal applied to a plasma display panel according to the related art;

2 is a circuit diagram showing a part of a configuration of a plasma display device according to the related art;

3 is a circuit diagram showing a part of the configuration of the plasma display device according to the present invention;

4 is a signal diagram showing a driving signal applied to a plasma display panel according to a first embodiment of the present invention;

5 is a flowchart illustrating a method of driving a plasma display device according to a first embodiment of the present invention.

6 is a signal diagram showing a driving signal applied to a plasma display panel according to a second embodiment of the present invention;

7 is a flowchart illustrating a method of driving a plasma display device according to a second embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

10: sustain drive unit 11: first sustain switch

12: second sustain switch 20: scan driver

21: Scan IC 21a: High Switch

21b: Low switch 30: Reset drive unit

31: pass switch 32: set-down switch

C1: first capacitor R1, R2: first, second variable resistor

D1: first diode

The present invention relates to a plasma display apparatus and an operation method, which are connected between an output terminal of a sustain driver and an input terminal of the scan driver, switch operation to supply the sustain voltage, and form a pass switch for supplying a setup voltage to the scan electrode ( Y) and a method of operating the same.

In general, a plasma display panel is a display device in which a vacuum ultraviolet light (VUV) generated by discharging a gas inside a panel collides with a phosphor in the panel to generate light. The plasma display panel includes a plurality of address electrodes X, a plurality of scan electrodes Y, and a sustain electrode Z, and discharge from the address electrodes X, the scan electrodes Y, and the sustain electrodes Z. To display the screen.

1 is a signal diagram illustrating a driving signal applied to a plasma display panel according to the related art.

As shown in FIG. 1, a driving signal applied to a conventional plasma display panel is divided into a reset period R, an address period A, and a sustain period S. As shown in FIG. During the reset period R, the setup reset signal R_up and the set-down reset signal R_dn are continuously supplied to initialize the discharge cells.

During the address period A, a data signal of positive polarity is applied to the address electrode X according to the image data, and a scan of negative polarity is opposed to the data signal to the scan electrode Y. The signal is supplied. In the case of the cell to which the data signal is applied, an address discharge occurs due to a voltage difference between the data signal and the scan signal.

During the sustain period S, a sustain signal is alternately supplied to the scan electrode Y and the sustain electrode Z. When the sustain signal is supplied to the cell where the address discharge is generated, a sustain discharge is generated and a screen is displayed. .

At this time, the setup reset signal R_up applied during the reset period R rises to the sustain voltage and then rises to the setup voltage. At this time, both the sustain voltage and the setup voltage have a setup reset signal R_up gradually rising.

2 is a circuit diagram showing a part of a configuration of a plasma display device according to the related art. 2 will be described together with FIG. 1.

As shown in FIG. 2, the plasma display apparatus includes a setup driver 2 for applying the setup reset signal R_up, a set-down driver 3 for applying the set-down reset signal R_dn, and a scan voltage. And a scan driver 4 for applying Vsc, and a pass switch 1 for passing the setup reset signal.

In order to apply the setup reset signal R_up, the setup driver 2 supplies a first driver a for applying a first setup voltage Vsetup1 to the scan electrode Y, and a second setup voltage Vsetup2. ) Is configured to include a second driver (b) for applying.

When the reset period R starts, the switch SR1 included in the first driver a is turned on to apply the first setup voltage Vsetup1 to the scan electrode Y. At this time, the first setup voltage ( Vsetup1) is formed with the sustain voltage Vs.

In this case, the sustain voltage Vs is applied to the scan electrode Y through the pass switch 1.

Subsequently, a second switch voltage Vsetup2 is applied to the scan electrode Y by driving the setup switch SR2 and the variable resistor R1 provided in the second driver b. In this case, the variable resistor R1 is applied. Is adjusted to supply a setup reset signal R_up that is gradually increased at the sustain voltage Vs applied to the scan electrode Y.

Here, the second setup voltage Vsetup2 is supplied from an external power supply Vsetup connected to the setup switch SR2.

Here, the pass switch 1 is turned on at the same time when the setup switch SR2 is switched on. At this time, the pass switch 1 is turned on to conduct the path so that the setup reset signal R_up applied through the setup switch SR2 is supplied to the scan electrode Y.

In addition, the pass switch 1 is turned off at the same time when the setup switch SR2 is turned off, and blocks the setup reset signal R_up applied to the scan electrode Y.

In the conventional driving circuit as described above, in order to apply the setup reset signal R_up, a separate power supply for applying the first setup voltage Vsetup1 and the second setup voltage Vsetup2 is provided, and the setup reset signal in the form of a lamp ( Since the ramp switch SR2 for generating and applying R_up and the pass switch 1 for conducting or blocking according to the pass signal must be provided separately, the circuit configuration is complicated.

In addition, as shown in FIG. 2, the setup switch SR2 and the pass switch 1 are separately configured, which causes a time delay phenomenon in which each switch reaches a threshold voltage of the switching operation.

In addition, a driving board for driving the plasma display panel is mounted on the plasma display panel substrate provided with the electrodes X, Y, and Z. If the circuit configuration of the driving board is complicated, the manufacturing cost increases as the board size increases. do.

The present invention has been made to solve the above-mentioned problems of the prior art, and forms a setup voltage and current path path through one pass switch located between the output terminal of the sustain driver and the scan driver, and applies it to the scan electrode (Y). It is an object of the present invention to provide a plasma display device.

In addition, an object of the present invention is to provide a plasma display device for supplying a scan voltage (Y) to the set-up voltage (S_up2) that is gradually increased by applying a second signal after the first signal is applied to the pass switch.

In addition, the present invention provides a plasma display apparatus which supplies a first signal and a second signal to the pass switch at the same time to reach the threshold voltage for the path switch conduction to minimize the time delay caused by the switching operation The purpose is to provide.

According to an aspect of the present invention, a plasma display device includes a sustain driver for applying a sustain voltage, a scan driver for applying a scan voltage to a scan electrode, and an output terminal between the sustain driver and an input terminal of the scan driver. And a reset driver including a pass switch switched on to form a path through which the sustain voltage is supplied, and a setup voltage gradually rising as the variable resistor connected to the gate of the pass switch is adjusted. It is characterized in that the supply to the scan electrode (Y).

In addition, the plasma display device according to the present invention is connected between a sustain driver for applying a sustain voltage, a scan driver for applying a scan voltage to a scan electrode, and an output terminal of the sustain driver and an input terminal of the scan driver. And a reset driver including a pass switch forming a path to be supplied, wherein the setup voltage gradually increases from a ground voltage level to a sum level of the sustain voltage and the scan voltage as the path switch is turned on to the scan electrode. It is characterized in that the supply.

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

3 is a circuit diagram showing a part of the configuration of the plasma display device according to the present invention.

In order to apply the reset signal, the address signal and the sustain signal to the scan electrode Y provided in the plasma display panel, a plurality of circuits are required.

As shown in FIG. 3, the plasma display apparatus of the present invention includes a sustain driver 10 for applying a sustain voltage Vs, a scan driver 20 for applying a scan voltage Vsc, and a sustain driver 10. It includes a reset switch 30 consisting of a pass switch 31 is connected between the output terminal of the scan driver 20 and the input terminal of the set-down switch 32 for generating a gradually falling set-down voltage.

The sustain driver 10 is connected to an external power source, and the first sustain switch 11 and the low potential sustain voltage GND to the scan electrode Y for applying the high potential sustain voltage Vs to the scan electrode Y. And a second sustain switch 12 for applying.

Here, the first sustain switch 11 has a drain connected to the external power source, a source connected to a drain of the second sustain switch 12, and a switching voltage to the gate. Is applied.

In addition, the second sustain switch 12 has a source connected to ground and a gate connected thereto.

Here, an output terminal is provided between the source of the first sustain switch 11 and the drain of the second sustain switch 12, and is connected to the reset driver 30.

The scan driver 20 includes a scan IC 21 connected to an external power supply Vsc and a first capacitor C1 connected in parallel with the scan IC 21.

 Here, the scan IC 21 includes a high switch 21a that operates to apply the scan voltage Vsc to the scan electrode Y, and a low switch 21b that operates opposite to the high switch 21a.

That is, the scan IC 21 is a scan electrode Y connected to an output terminal between the high switch 21a and the low switch 21b so that one of the high switch 21a and the low switch 21b operates complementarily. Apply voltage.

In addition, the first capacitor C1 charges and discharges the external power source Vsc, and when the high switch 21a of the scan IC is switched on, the scan voltage Vsc which is the discharge voltage to the scan electrode Y. ) Is applied.

The reset driver 30 supplies the set-up voltage S_up2 gradually rising to the scan electrode Y and the set-down voltage S_dn gradually falling.

Here, the reset driver 30 is connected between the output terminal of the sustain driver 10 and the input terminal of the scan driver 20 to convert the sustain voltage Vs and the gradually rising setup voltage S_up2 into the scan electrode Y. A pass-down switch 31 for conducting and interrupting to be applied, and a set-down switch connected to the input terminals of the pass switch 31 and the sustain driver 20 to apply a progressively decreasing set-down voltage S_dn to the scan electrode Y. And (32).

 The pass switch 31 has a drain connected to an output terminal of the sustain driver 10, a source connected to an input terminal of the scan driver 20, and a gate to the first variable resistor R1. And a first diode D1 in parallel.

In this case, the first signal is applied to the gate of the pass switch 31 through the first diode D1, and the second signal is applied through the first variable resistor R1.

Here, the cathode of the first diode D1 is connected to the gate of the pass switch 31, and the first signal is applied to the anode.

The set-down switch 32 has a drain connected to the source and scan driver 30 of the pass switch 31, a source connected to the ground, and a gate connected to the second variable resistor R2. And a second diode D2.

In addition, the slope of the reset signal applied from the pass switch 31 and the set-down switch 32 is determined by the RC time constant value by the first and second variable resistors R1 and R2. To this end, a capacitor is typically connected to the first and second variable resistors R1 and R2 and the drain of the setup switch 31 or the set-down switch 32.

The first embodiment of the present invention will be described based on the circuit configured as shown in FIG. 4 is a signal diagram illustrating a driving signal applied to the plasma display panel according to the first embodiment of the present invention, and FIG. 5 is a flowchart illustrating a driving method of the plasma display device according to the first embodiment of the present invention. .

 The driving signal applied to the plasma display panel of the present invention includes a setup period S_up to which a setup signal rising to the scan electrode Y is applied in the reset period R, and a setdown period S_dn to which a falling setdown signal is applied. Is done.

In this case, the setup period S_up includes the first setup period S_up1 that rapidly rises by the scan voltage Vsc at the ground level GND, and the scan voltage Vsc and the sustain voltage Vs from the scan voltage Vsc. A second setup period S_up2 to which a setup signal that gradually rises to the sum voltage level is applied.

In the first setup section S_up1, a scan voltage Vsc that rises rapidly at the ground level GND is applied to the scan electrode Y (S1). To this end, the high switch 21a of the scan IC 21 is turned on so that the scan voltage Vsc is applied to the scan electrode Y.

Thereafter, the pass switch 31 is turned on in the second setup period S_up2 (S2).

Here, the pass switch 31 is switched on by applying a first signal through a first diode D1 connected in parallel with the first variable resistor R1 to the gate, whereby the sustain driver 10 and the scan driver are turned on. A current path path is formed between the 20, the first sustain switch 11 of the sustain driver 10 is turned on, and the sustain voltage Vs is applied to the scan electrode Y (S3).

In this case, the pass switch 31 supplies the scan electrode Y with a setup signal gradually rising by the sustain voltage Vs by the second signal applied through the first variable resistor R1 to the gate.

As a result, the maximum voltage of the setup signal becomes the sum level voltage of the sustain voltage Vs and the scan voltage Vsc (S4).

The set-down period S_dn cuts off the application of the scan voltage Vsc to apply the setdown signal, and then cuts off the application of the sustain voltage Vs (S5).

In addition, the pass switch 31 is turned off so that the set down signal is applied, and the set down switch 32 is turned on (S6).

Therefore, the set down switch 32 is turned on to apply the gradually decreasing set down signal to the scan electrode Y.

Therefore, in the first embodiment, during the reset period R, the high switch 21a of the scan IC 21 is turned on in the first setup period S_up1 to rapidly increase as much as the scan voltage Vsc, and the second time. In the setup period S_up2, the first signal and the second signal are sequentially applied to the pass switch 31. At this time, the pass switch 31 is turned on by the first signal, and then the second signal is applied. The setup signal which gradually increases from the scan voltage Vsc level by the sustain voltage Vs is supplied to the scan electrode Y.

In contrast, the second exemplary embodiment illustrated in FIGS. 6 and 7 gradually increases the scan voltage Vsc and the sustain voltage Vs from the ground level GND in the setup period S_up during the reset period R. FIG. The gradually rising set-up voltage is supplied to the scan electrode (Y). However, the first signal and the second signal are simultaneously applied to the pass switch 31 to be turned on quickly, and are gradually raised with at least one slope.

6 is a signal diagram illustrating a driving signal applied to the plasma display panel according to the second embodiment of the present invention, and FIG. 7 is a flowchart illustrating a driving method of the plasma display device according to the second embodiment of the present invention. .

The driving signal applied to the plasma display panel of the present invention includes a setup period S_up to which a setup signal gradually rising to the scan electrode Y is applied in the reset period R, and a setdown period to which a falling setdown signal is applied ( S_dn).

Here, in the setup period S_up, the low switch 21b of the scan IC 21 is turned on so that the ground level GND is maintained (S1). At this time, the pass switch 31 and the set-down switch 32 is turned off.

In order to generate a setup signal which gradually rises to the scan electrode Y, the pass switch 31 is turned on (S2).

That is, the pass switch 31 is applied to the gate through the first diode D1 and the second signal through the first variable resistor R1 at the same time for a predetermined time T, thereby rapidly reaching the threshold voltage. Is reached, thereby raising the voltage of the scan electrode Y to the first slope.

Here, the predetermined time T is a time delay in which the second signal is applied after the first signal is applied, and the predetermined time is in a range of 20 ns to 200 ns. At this time, when the predetermined time T is less than 20 ns, time loss due to the input capacitance of the pass switch 31 occurs, and when larger than 200 ns, the voltage rises rapidly to the scan electrode Y. There is a high possibility of false discharge.

In addition, after the switching switch is turned on, only the second signal is applied to the gate to supply a setup signal that gradually rises with the second slope (S3).

As a result, the conventional setup signal gradually rises to the second slope, but the present invention gradually rises to the first slope for a predetermined time T, and then gradually rises to the second slope, so that the setup section S_dn It is shortened. In addition, the setup signal has a first slope greater than the second slope.

Here, the first sustain switch 11 of the sustain driver 10 is turned on so that the sustain voltage Vs is applied to the pass switch 31. At this time, the pass switch 31 is applied with the sustain voltage Vs at the drain and the low potential scan voltage Vsc at the source, so that the voltage between both ends becomes the sum voltage level of the sustain voltage Vs and the scan voltage Vsc. Unlike the first embodiment, as shown in FIG. 6, the setup signal gradually rises from the ground level GND in the setup period S_up.

At this time, the setup signal gradually rises from the ground level GND to the sum voltage level of the sustain voltage Vs and the low potential scan voltage Vsc.

The set-down period S_dn cuts off the application of the scan voltage Vsc to apply the setdown signal, and then cuts off the application of the sustain voltage Vs (S4).

In addition, the pass switch 31 is turned off so that the set-down reset signal R_dn is applied, and the set-down switch 32 is turned on (S5).

Therefore, the set down switch 32 is turned on, and applies the set down signal gradually decreasing to the scan electrode Y (S6).

The first embodiment and the second embodiment may supply differently the setup signals supplied to the scan electrodes during the setup period by differently applying the first signals and the second signals, and thus the scan ICs may be different. There is a difference that works.

As described above, the plasma display device according to the present invention has been described with reference to the illustrated drawings. However, the present invention is not limited by the embodiments and drawings disclosed herein, and may be applied within a range in which technical thoughts are protected.

In the plasma display device according to the present invention configured as described above, a setup reset signal R_up is generated and applied to the scan electrode Y through one pass switch positioned between the output terminal of the sustain driver and the scan driver. This simplifies configuration and reduces costs.

In addition, the plasma display device according to the present invention is applied to the first signal and the second signal of the pass switch at the same time to reach the threshold voltage quickly, thereby reducing the time delay according to the switching speed, the relatively sustain period or By extending the scan period, it is effective to increase brightness and improve image quality.

Claims (15)

A switching turn-on connected between a sustain driver for applying a sustain voltage, a scan driver for applying a scan voltage to a scan electrode, and an output terminal of the sustain driver and an input terminal of the scan driver to form a path for supplying the sustain voltage; It includes a reset driver having a pass switch that is, The pass switch, And a variable resistor connected to the gate to supply a setup signal having a slope gradually rising by a sustain voltage to the scan electrode (Y) by varying the resistance of the variable resistor. The method of claim 1, And the scan driver includes an external power supply for applying the scan voltage, a scan IC for applying the scan voltage to a scan electrode, and a first capacitor connected in parallel with the scan IC. The method of claim 2, The scan IC comprises a high switch and a low switch that operate complementarily, And a scan electrode (Y) connected between the high switch and the low switch. The method of claim 1, The path switch may include a drain connected to an output terminal of the sustain driver, a source connected to an input terminal of the scan driver, and a variable resistor and a diode connected to a gate in parallel. Device. The method of claim 4, wherein The path switch switching turn by the first signal supplied through the diode-plasma display, characterized in that the supplying of the setup signal with the second signal to be turned off, supplied through the variable resistor-on or turn- Device. The method of claim 5, And the second signal is applied to the gate of the pass switch after the first signal is applied. The method of claim 6, The setup signal indicates that the high switch of the scan IC is turned on to rise by a scan voltage, and the pass switch is turned on by the first signal and the second signal to gradually rise by a sustain voltage. And a plasma display device. A sustain driver for applying a sustain voltage, a scan driver for applying a scan voltage to a scan electrode, and a pass switch connected between an output terminal of the sustain driver and an input terminal of the scan driver to form a path for supplying the sustain voltage; Includes a reset drive unit, And a setup voltage which gradually rises from the ground voltage level to the sum level of the sustain voltage and the scan voltage as the pass switch is supplied to the scan electrode. The method of claim 8, The scan driver is connected in parallel with an external power supply for applying the scan voltage, a first capacitor storing the scan voltage, and the first capacitor, and outputs to the scan electrode up to a sum level of the scan voltage and the sustain voltage. And a scan IC. The method of claim 9, The scan IC comprises a high switch and a low switch that operate complementarily, And a scan electrode (Y) connected between the high switch and the low switch. The method of claim 8, The path switch may include a drain connected to an output terminal of the sustain driver, a source connected to an input terminal of the scan driver, and a variable resistor and a diode connected to a gate in parallel. Device. The method of claim 11, The pass switch is switched on or off by a first signal supplied through the diode and a second signal supplied through the variable resistor, and the setup voltage is supplied by the second signal. Plasma display device. The method of claim 12, And the first signal and the second signal are simultaneously applied to the gate of the pass switch. The method of claim 12, The set-up voltage is a sum level voltage of the sustain voltage and the scan voltage by the second signal when the low switch is turned on and the pass switch is turned on by the first signal and the second signal. The plasma display device characterized in that the rising gradually. The method of claim 14, And the first signal is blocked after a predetermined time (T) has elapsed.

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