KR100705820B1 - Plasma Display Apparatus - Google Patents

Abstract

The present invention relates to a plasma display device, and more particularly, to a plasma display device capable of reducing manufacturing costs and improving driving efficiency by improving a driving circuit of the plasma display device.

According to the present invention, a plasma display apparatus includes: a plasma display panel having a scan electrode and an address electrode intersecting the scan electrode; A scan driver configured to supply a setup pulse consisting of a sum of a sustain voltage and a scan reference voltage to the scan electrode; And a data driver supplying the address electrode with an address pulse rising from the first positive voltage to the second voltage.

Description

Plasma Display Apparatus {Plasma Display Apparatus}

1 is a view showing a driving waveform of a conventional plasma display device.

2 is a view for explaining a scan driver of a conventional plasma display device.

3 is a timing diagram illustrating a switching operation of a reset period in a conventional plasma display driving apparatus.

4 is a view for explaining a plasma display device according to an embodiment of the present invention.

5 is a view for explaining a driving waveform of the plasma display device according to an embodiment of the present invention.

6 illustrates a scan driver of a plasma display device according to an embodiment of the present invention.

7 is a timing diagram illustrating a switching operation of a reset period in the plasma display driving apparatus according to an embodiment of the present invention.

8 is a diagram for describing a data driver according to an exemplary embodiment of the present invention.

9 is a diagram for describing a data driver according to another exemplary embodiment of the present invention.

***** Explanation of symbols for main parts of drawing *****

400; Plasma display panels 410, 820, and 920; Data driver

420; A scan driver 430; Sustain drive

610; Setup voltage and scan reference voltage supply 620; Set-down voltage supply

630; Scan voltage supply 640; Sustain voltage supply

650; Drive pulse output units 810 and 910; Control

830, 930; Transmission

The present invention relates to a plasma display device, and more particularly, to a plasma display device capable of reducing manufacturing costs and improving driving efficiency by improving a driving circuit of the plasma display device.

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

1 is a view showing a driving waveform of a conventional plasma display device.

As shown in Fig. 1, the plasma display apparatus erases a reset period for initializing all cells, an address period for selecting a cell to be discharged, a sustain period for maintaining the discharge of the selected cell, and wall charges in the discharged cell. It is divided into an erase period for driving.

In the reset period, in the setup period, all of the scan electrodes are simultaneously supplied with a setup pulse forming a ramp-up. A weak dark discharge occurs in the discharge cells of the full screen by the setup pulse. Due to the setup discharge, positive wall charges are accumulated on the address electrode and the sustain electrode, and negative wall charges are accumulated on the scan electrode.

In the setdown period, after the setup pulse is supplied, the scan electrode is supplied with a setdown pulse that forms a ramp-down ramp from a voltage level lower than the highest voltage level of the setup discharge to a predetermined negative voltage level. By generating a weak erase discharge in the cells, the wall charges excessively formed in the scan electrode are sufficiently erased. The wall charges such that the address discharges can be stably generated by the set-down discharges remain uniformly in the discharge cells.

In the address period, the scan pulses forming the negative waveform are sequentially supplied to the scan electrodes, and the address pulses forming the positive waveform are supplied to the address electrodes in synchronization with the scan pulses. As the potential difference between the scan pulse and the address pulse and the wall voltage generated in the reset period are added, address discharge is generated in the discharge cell to which the address pulse is applied. In the cells selected by the address discharge, wall charges are formed such that sustain discharge can occur when a sustain pulse is applied. The pulse having the positive bias voltage Vzb is applied to the sustain electrode so that the potential difference with the scan electrode is reduced during the set down period or the address period so that erroneous discharge with the scan electrode does not occur.

In the sustain period, sustain pulses having an alternating positive waveform are supplied to the scan electrodes and the sustain electrodes. In the cell selected by the address discharge, as the wall voltage and the sustain pulse in the cell are added, a sustain discharge, that is, a display discharge, occurs between the scan electrode and the sustain electrode every time the sustain pulse is applied.

After the sustain discharge is completed, an erase pulse (Ramp-ers) having a narrow pulse width and a low voltage level is supplied to the sustain electrode in the erase period to erase the wall charge remaining in the cells of the full screen.

A conventional plasma display device for supplying such a driving waveform is as shown in FIG. 2.

2 is a view for explaining a scan driver of a conventional plasma display device.

Referring to FIG. 2, a scan driver of a conventional plasma display apparatus includes a setup voltage supply unit 210, a scan reference voltage supply unit 220, a setdown voltage supply unit 230, a scan voltage supply unit 240, and a sustain voltage supply unit 250. , The seventh switch Q7 connected between the driving pulse output unit 260, the setup voltage supply unit 210, and the driving pulse output unit 260, and the connection between the setup voltage supply unit 210 and the sustain voltage supply unit 250. And a sixth switch Q6.

The setup voltage supply unit 210 may include a third diode D3 and a fifth switch Q5 connected between the setup voltage source VST and the first node n1, and the setup voltage source VST and the sustain voltage supply unit. It includes a second capacitor (C2) connected between the recovery unit 220. The third diode D3 blocks the reverse current flowing from the second capacitor C2 toward the setup voltage source VST. The second capacitor C2 adds the sustain voltage Vs supplied from the sustain voltage supply unit 210 and the voltage value of the setup voltage source VST to the fifth switch Q5. The fifth switch Q5 supplies the setup voltage to the first node n1 during the reset period.

The scan reference voltage supply unit 220 is connected to the third capacitor C3 connected between the scan reference voltage source VSC and the second node n2, and connected between the scan reference voltage source VSC and the second node n2. An eighth switch Q8 and a ninth switch Q9. The scan reference voltage Vsc is supplied to the scan electrode during the address period by the operation of the third capacitor C3 and the eighth switch Q8. At this time, the ninth switch Q9 is turned off so that the twelfth switch Q12 and the thirteenth switch Q13 are not short-circuited.

The setdown voltage supply unit 230 includes a tenth switch Q10 connected between the second node n2 and the scan voltage source -VY. The setdown voltage supply unit 230 gradually lowers the voltage supplied to the driving pulse output unit 260 with a predetermined slope to the scan voltage (−Vy) during the setdown period included in the reset period.

The scan voltage supply unit 240 includes an eleventh switch Q11 connected between the second node n2 and the scan voltage source -VY. The eleventh switch Q11 is turned on during the address period to supply the scan voltage −Vy to the driving pulse output unit 260.

The sustain voltage supply unit 250 includes an energy supply / recovery unit 251, a sustain voltage source VS, and a ground voltage source GND. The energy supply / recovery unit 251 includes an energy supply and recovery capacitor C1 for storing and recovering energy supplied to the plasma display panel Cp, an energy supply and recovery capacitor C1, and a driving pulse output unit. Inductor L1 connected between 260, first switch Q1, first diode D1, and second switch connected in parallel between inductor L1 and energy supply and recovery capacitor C1. Q2 and the second diode D2. Excessive power consumption is reduced when the sustain voltage Vs is supplied to the plasma display panel Cp through the operation of the energy supply / recovery unit 221.

The driving pulse output unit 260 is a twelfth voltage to which a voltage is input from the setup voltage supply unit 210, the scan reference voltage supply unit 220, the set-down voltage supply unit 230, the scan voltage supply unit 240, and the sustain voltage supply unit 250. And thirteenth switches Q12 and Q13. The output line between the twelfth and thirteenth switches Q12 and Q13 is connected to any one of the scan electrodes (not shown) of the plasma display panel Cp.

The process of generating a reset waveform among the driving waveforms shown in FIG. 1 in the conventional plasma display apparatus will be described with reference to FIG. 3.

3 is a timing diagram illustrating a switching operation of a reset period in a conventional plasma display driving apparatus.

Here, it is assumed that the voltage Vst of the setup voltage source is stored in the second capacitor C2.

First, the fifth switch Q5 and the seventh switch Q7 are turned on during the setup period, and the sixth switch Q6 and the tenth switch Q10 are turned off. At this time, the sustain voltage Vs is supplied from the sustain voltage supply unit 240. The sustain voltage Vs is supplied to the plasma display panel Cp via the internal diode of the sixth switch Q6, the seventh switch Q7, and the driving pulse output unit 260. The voltage of the plasma display panel Cp rises rapidly to the sustain voltage Vs level.

Thereafter, the setup voltage Vst stored in the second capacitor C2 is combined with the voltage Vs of the sustain voltage source and supplied to the fifth switch Q5. The voltage supplied from the second capacitor C2 is supplied to the first node point n1 with a predetermined slope by the first variable resistor VR1 included in the fifth switch Q5. The rising ramp waveform Ramp-up is supplied to the plasma display panel Cp via the seventh switch Q7 and the driving pulse output unit 260 through a voltage applied to the first node point n1 with a predetermined slope. do.

 Thereafter, the fifth switch Q5 is turned off. When the fifth switch Q5 is turned off, only the voltage of the sustain voltage Vs is applied to the first node point n1, and the voltage of the plasma display panel Cp drops rapidly to the sustain voltage Vs.

Thereafter, the seventh switch Q7 and the tenth switch Q10 are turned off during the setdown period. The scan voltage (-Vy) supplied from the scan voltage source by the second variable resistor VR2 included in the tenth switch Q10 is supplied to the second node point n2 with a predetermined slope. The falling ramp waveform Ramp-down is supplied to the plasma display panel Cp via the driving pulse output unit 210.

On the other hand, the conventional plasma display apparatus has a problem that the manufacturing cost increases due to the use of a high breakdown voltage switching element. For example, the sixth switch Q6 serves to add the sustain voltage Vs to the setup voltage voltage Vst, but requires a high breakdown voltage because the sixth switch Q6 is located in a path to which the sustain pulse is supplied. In addition, since the tenth switch Q10 is located in the path to which the negative voltage (-Vy) is supplied, the manufacturing cost increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a plasma display apparatus which can reduce manufacturing costs by improving the plasma display apparatus.

In addition, another object of the present invention is to provide a plasma display device in which the number of switching elements is reduced by improving the plasma display device.

In addition, another object of the present invention is to provide a plasma display device capable of lowering the breakdown voltage of a switching element by improving the plasma display device.

 In order to achieve the above object, the plasma display device of the present invention comprises a plasma display panel having a scan electrode and an address electrode intersecting the scan electrode; A scan driver configured to supply a setup pulse consisting of a sum of a sustain voltage and a scan reference voltage to the scan electrode; And a data driver supplying the address electrode with an address pulse rising from the first positive voltage to the second voltage.

The data driver of the present invention is configured to supply the first voltage during a set down period of a reset period.

The scan driver of the present invention is characterized by supplying a setdown pulse or a scan pulse whose minimum voltage level is greater than or equal to the ground level.

The setup pulse of the present invention is gradually raised from the sustain voltage to the sum of the sustain voltage and the scan reference voltage.

The scan driver of the present invention includes: a setup voltage and a scan reference voltage supply unit supplying the setup voltage to the scan electrode during a reset period and supplying the scan reference voltage during an address period; A set-down voltage supply unit supplying the scan electrode with a set-down voltage which is less than the setup voltage level and equal to or greater than the ground voltage level during the reset period; A scan voltage supply unit configured to supply a scan voltage to the scan electrode that is less than the scan reference voltage level and equal to or greater than a ground voltage level during an address period; And a sustain voltage supply unit configured to supply a sustain voltage to the scan electrode during the sustain period.

The setup voltage and scan reference voltage supply unit of the present invention is connected to the scan reference voltage source to store the scan reference voltage supplied from the scan reference voltage source; And a setup and scan common switch having one end connected in common with the capacitor and the scan reference voltage source, and the other end connected with a driving pulse output connected to the scan electrode.

The setup and scan common switch of the present invention is turned on in the setup period of the reset period to supply the setup pulse, and is turned on in the address period to supply the scan reference voltage.

When the lowest voltage level of the setdown pulse or the scan pulse of the present invention is the ground level, the setdown voltage supply unit or the scan voltage supply unit is connected to a ground voltage source.

The plasma display apparatus of the present invention further includes a control unit for converting an externally input image signal into image signal data for driving the data driver, and a transmission unit for plotting and transmitting the image signal data from the control unit to the data driver. It is characterized by including.

The transmitter of the present invention includes a capacitor connected to the control unit and a resistor connected between the capacitor and the first voltage supply path of the data driver.

The transmission unit of the present invention is characterized by using any one of the optical fiber or photo coupler.

The transmission unit of the present invention is characterized in that for transmitting the control signal in a differential signal method.

The data driver may include a first voltage supply unit configured to supply the first voltage and a second voltage supply unit configured to supply the second voltage having a difference between the first voltage and the address discharge voltage according to the floated image signal data. It is characterized by including.

Hereinafter, with reference to the accompanying drawings, a specific embodiment according to the present invention will be described.

4 is a view for explaining a plasma display device according to an embodiment of the present invention.

As shown in FIG. 4, the plasma display apparatus according to the exemplary embodiment includes a plasma display panel 400, a data driver 410, a scan driver 420, and a sustain driver 430.

The plasma display panel 400 is formed by bonding a front substrate (not shown) and a rear substrate (not shown). On the front substrate, a plurality of electrodes, for example, a plurality of scan electrodes Y ₁ to Yn and a sustain electrode Z in which a plurality of electrodes are commonly connected are formed in pairs. A plurality of address electrodes X ₁ to Xm are formed on the rear substrate to intersect the electrode pairs of the scan electrodes Y ₁ to Yn and the sustain electrode Z.

The data driver 410 applies data to the address electrodes X ₁ to Xm formed in the plasma display panel 400. Here, the data is image signal data processed by an image signal processor (not shown) which processes an image signal input from the outside into a signal for driving the plasma display apparatus. The data driver 410 supplies an address pulse having an address voltage Va to each of the address electrodes X ₁ to Xm.

The data driver 410 according to an exemplary embodiment of the present invention supplies address pulses having a waveform rising from the first positive voltage to the second voltage to the address electrodes X ₁ to Xm. In addition, the data driver 410 supplies the first voltage to the address electrodes X ₁ to Xm during the set down period of the reset period. As a result, the voltage levels of the setdown pulse and the scan pulse whose conventional lowest voltage level is the negative voltage level can be set to the ground level or higher, and the breakdown voltage of the switching element for supplying the setdown pulse and the scan pulse can be lowered.

A configuration and an operation characteristic of the plasma display apparatus according to an exemplary embodiment for implementing the address pulse rising from the first voltage of the positive voltage to the second voltage will be described in detail later.

The scan driver 420 supplies the setup pulses forming the rising ramp waveform Ramp-up to the scan electrodes Y ₁ to Yn during the set-up period of the reset period, and also the falling ramp waveform Ramp during the set-down period of the reset period. The setdown pulse constituting -down is supplied to the scan electrodes Y ₁ to Yn. In addition, the scan driver 420 sequentially supplies the scan pulse Sp to the scan electrodes Y ₁ to Yn during the address period, and supplies the sustain pulse to the scan electrodes Y ₁ to Yn during the sustain period. .

Here, the scan driver 420 according to an embodiment of the present invention supplies a setup pulse consisting of the sum of the sustain voltage and the scan reference voltage to the scan electrodes Y ₁ to Yn. As a result, unlike the related art, a separate setup voltage supply unit is unnecessary. In addition, according to the operating characteristics of the data driver 410 described above, the lowest voltage level of the setdown pulse or the scan pulse is equal to or greater than the ground level. Accordingly, the number of switching elements constituting the scan driver 420 can be reduced, and the breakdown voltage characteristic can be lowered. A more detailed description thereof will be described later.

The sustain driver 430 supplies the bias voltage Vz to the common connected sustain electrode Z during at least one of a set down period and an address period, and alternates with the scan driver 420 to transmit a sustain pulse to the sustain electrode Z. Will be supplied.

5 is a view for explaining a driving waveform of the plasma display device according to an embodiment of the present invention.

As shown in FIG. 5, the plasma display apparatus according to an embodiment of the present invention includes a reset period for initializing all cells, an address period for selecting a cell to be discharged, a sustain period for maintaining discharge of the selected cell, and The driving is divided into an erasing period for erasing wall charges in the discharged cell.

In the reset period, a setup pulse of a ramp-up waveform is simultaneously supplied to all scan electrodes. The setup pulse peak voltage level according to one embodiment of the invention consists of the sum of the sustain voltage and the scan reference voltage. That is, the setup pulse can be sufficiently supplied only by the sustain voltage source and the scan reference voltage source without providing a separate voltage source. A weak dark discharge occurs in the discharge cells of the full screen by the setup pulse. Due to the setup discharge, positive wall charges are accumulated on the address electrode and the sustain electrode, and negative wall charges are accumulated on the scan electrode.

In the setdown period, after the setup pulse is supplied, the scan electrode is supplied with a setdown pulse that forms a ramp-down waveform falling from a voltage level lower than the highest voltage level of the setup discharge to a predetermined voltage level. The set down pulse according to an embodiment of the present invention is lowered to a voltage level above the ground level, preferably to the ground level. This is because the reference pulse having the positive reference voltage, that is, the first voltage of the present invention, is supplied to the illustrated address electrode during the set down period. That is, the potential difference between the setdown voltage and the first voltage according to an embodiment of the present invention may cause sufficient erase discharge as in the related art.

By generating a weak erase discharge in the cells by the setdown pulse, the wall charges excessively formed in the scan electrode are sufficiently erased. The wall charges such that the address discharges can be stably generated by the set-down discharges remain uniformly in the discharge cells.

In the address period, the scan pulses forming the falling waveform are sequentially supplied to the scan electrodes, and the address pulses forming the rising waveform are supplied to the address electrodes in synchronization with the scan pulses. The scan pulse according to an embodiment of the present invention is lowered to a voltage level above the ground level, preferably to the ground level. This is because the address pulse having the positive voltage supplied during the address period, that is, the second voltage of the present invention, is supplied to the illustrated address electrode. That is, the potential difference between the address voltage and the scan voltage according to one embodiment of the present invention can cause sufficient address discharge as in the prior art.

 As the potential difference between the scan pulse and the address pulse and the wall voltage generated in the reset period are added, address discharge is generated in the discharge cell to which the address pulse is applied. In the cells selected by the address discharge, wall charges are formed such that sustain discharge can occur when a sustain pulse is applied. The pulse having the positive bias voltage Vzb is applied to the sustain electrode so that the potential difference with the scan electrode is reduced during the set down period and the address period so that erroneous discharge with the scan electrode does not occur.

In the sustain period, sustain pulses having a positive waveform are alternately supplied to the scan electrodes and the sustain electrodes. In the cell selected by the address discharge, as the wall voltage and the sustain voltage in the cell are added, a sustain discharge, that is, a display discharge, occurs between the scan electrode and the sustain electrode every time the sustain pulse is supplied.

After the sustain discharge is completed, an erase pulse (Ramp-ers) having a narrow pulse width and a low voltage level is supplied to the sustain electrode in the erase period to erase the wall charge remaining in the cells of the full screen. Such a driving waveform according to an embodiment of the present invention is implemented according to the configuration and operation characteristics of the scan driver or the data driver of FIG. 4. Here, the scan driver according to an embodiment of the present invention will be described with reference to FIG. 6.

6 illustrates a scan driver of a plasma display device according to an embodiment of the present invention.

As shown in FIG. 6, the scan driver according to an embodiment of the present invention includes a setup voltage and a scan reference voltage supply unit 610, a setdown voltage supply unit 620, a scan voltage supply unit 630, and a sustain voltage supply unit 640. And a driving pulse output unit 650.

The setup voltage and the scan reference voltage supply unit 610 supply the scan electrode with the setup voltage Vs + Vsc during the reset period and the scan reference voltage Vsc during the address period. That is, the set-up voltage and the scan reference voltage supply unit 610 are connected to the scan reference voltage source VSC and one end of the second capacitor C2 for storing the scan reference voltage Vsc supplied from the scan reference voltage source VSC. And a setup and scan common switch Q5 connected in common with the two capacitors C2 and the scan reference voltage source VSC, and connected to a driving pulse output unit 650 connected to the scan electrode at the other end thereof.

At this time, the setup and scan common switch Q5 is turned on in the setup period of the reset period so that the setup voltage is supplied to the scan electrode via the drive pulse output unit 650, and is turned on in the address period so that the scan reference voltage is turned on in the drive period. Via the output unit 650 to be supplied to the scan electrode. Here, the setup and scan common switch Q5 uses a switching element that can gradually change the voltage passing through to form a setup waveform, and can also form a scan reference waveform by constantly supplying the passing voltage.

The setdown voltage supply unit 620 supplies the scan electrode with a setdown voltage that is less than the setup voltage level and equal to or greater than the ground voltage level during the address period. Here, the lowest voltage level of the setdown pulse is preferably at the ground level, and thus the setdown voltage supply unit 620 is connected to the ground voltage source GND. That is, the seventh switch Q7 is connected between the ground voltage source GND and the first node point n1. The seventh switch Q7 allows the setdown voltage, which is turned on in the setdown period included in the reset period and gradually decreases to the ground level, to be supplied to the scan electrode via the driving pulse output unit 650.

The scan voltage supplier 630 supplies the scan electrode with a scan voltage that is less than the scan reference voltage level and equal to or greater than the ground voltage level during the address period. Here, the lowest voltage level of the scan pulse is preferably the ground level. Accordingly, the scan voltage supply unit 630 includes a first node point n1 and a ground voltage source GND.

Therefore, in one embodiment of the present invention, the scan voltage supply unit 630 is included in the sustain voltage supply unit 640 and is connected to the fourth switch Q4 connected between the ground voltage source GND and the first node point n1. Configure According to another embodiment of the present invention, the set-down voltage supply unit 620, that is, the seventh switch Q7 is connected between the ground voltage source GND and the first node point n1. Here, the seventh switch Q7 gradually changes the voltage passing therethrough to form a set-down waveform, and uses a switching element capable of instantaneously supplying and cutting off the passing voltage to form a scan waveform.

The sustain voltage supply unit 640 supplies the sustain voltage Vs to the scan electrode during the sustain period. The sustain voltage supply unit 640 includes a third switch Q3 and a ground voltage source GND connected between the energy supply / recovery unit 641, the sustain voltage source VS, the sustain voltage source VS, and the first node point n1. ) And a fourth switch Q4 connected between the ground voltage source GND and the first node point n1. The energy supply / recovery unit 641 includes an energy supply and recovery capacitor C1 for storing and recovering energy supplied to the plasma display panel Cp, an energy supply and recovery capacitor C1, and a driving pulse output unit. Inductor L1 connected between 650, first switch Q1, first diode D1, second switch connected in parallel between inductor L1 and energy supply and recovery capacitor C1. Q2 and the second diode D2. Excessive power consumption is reduced when the sustain voltage Vs is supplied to the plasma display panel Cp through the operation of the energy supply / recovery unit 221.

The driving pulse output unit 650 includes eighth and ninth switches through which a voltage is input from the setup voltage and the scan reference voltage supply unit 610, the setdown voltage supply unit 620, the scan voltage supply unit 630, and the sustain voltage supply unit 640. It consists of (Q8, Q9). The output line between the eighth and ninth switches Q8 and Q9 is connected to any one of the scan electrodes of the plasma display panel Cp. Here, the sixth switch Q6 is turned off for the rest of the period except for the sustain period so that the eighth switch Q8 and the ninth switch Q9 are not short-circuited.

As described above, according to the exemplary embodiment of the present invention, the setup pulse formed by the sum of the sustain voltage and the scan reference voltage is supplied to the scan electrode, and the minimum voltage levels of the setdown pulse and the scan pulse are changed according to the voltage level applied to the address electrode. By having a ground level or more, it is possible to reduce the number of conventional switch elements and to lower the breakdown voltage of the switch elements used. That is, the conventional sixth switch Q6, the seventh switch Q7, and the eleventh switch Q11 illustrated in FIG. 2 are deleted, and the elements constituting the setup voltage supply unit 210 are also deleted. In addition, the internal pressure of the tenth switch Q10 may be lowered.

A process of generating a reset waveform among the driving waveforms shown in FIG. 5 in the plasma display apparatus according to an exemplary embodiment of the present invention will be described with reference to FIG. 6.

7 is a timing diagram illustrating a switching operation of a reset period in the plasma display driving apparatus according to an embodiment of the present invention.

Here, it is assumed that the second capacitor C2 stores the voltage Vsc of the setup voltage and the scan reference voltage source VSC.

First, during the setup period, the third switch Q3, the setup and scan common switch Q5, and the eighth switch Q8 are turned on, and the sixth switch Q6, the seventh switch Q7, and the ninth switch Q9. ) Is turned off. At this time, the sustain voltage Vs is supplied from the sustain voltage supply unit 640. The sustain voltage Vs is supplied to the plasma display panel Cp via the third switch Q3, the setup and scan common switch Q5, and the eighth switch Q8 of the driving pulse output unit 650. The voltage of the plasma display panel Cp rises rapidly to the sustain voltage Vs level.

Thereafter, the scan reference voltage Vsc stored in the second capacitor C2 is combined with the sustain voltage Vs of the sustain voltage source VS and supplied to the setup and scan common switch Q5. The gradually rising voltage supplied from the second capacitor C2 by the first variable resistor VR1 included in the setup and scan common switch Q5 may cause the eighth switch Q8 of the driving pulse output unit 650. It is supplied to the plasma display panel Cp via.

 The setup and scan common switch Q5 is then turned off. When the setup and scan common switch Q5 is turned off, only the voltage of the sustain voltage Vs is supplied to the plasma display panel Cp via the eighth switch Q8 of the driving pulse output unit 650 to supply the plasma display panel. The voltage of Cp drops rapidly to the sustain voltage Vs.

Thereafter, during the set down period, the seventh switch Q7 and the ninth switch Q9 are turned on while the third switch Q3 and the eighth switch Q8 are turned off. The ninth switch of the driving pulse output unit 650 receives a voltage which gradually decreases with a predetermined slope to the ground level held by the ground voltage source GND by the second variable resistor VR2 included in the seventh switch Q7. It is supplied to the plasma display panel Cp via Q9.

The sixth switch Q6 is turned off during the reset period so that the eighth switch Q8 and the ninth switch Q9 are not shorted. The sixth switch Q6 is turned on during the sustain period so that the eighth switch Q8 and the ninth switch Q9 are short-circuited to form one node point, through which the sustain pulse is supplied to the plasma display panel Cp.

On the other hand, the data driver according to an embodiment of the present invention in order to supply the address pulse rising from the first voltage of the positive polarity to the second voltage to the address electrode, as shown in FIG. do.

8 is a diagram for describing a data driver according to an exemplary embodiment of the present invention.

As shown in FIG. 8, the plasma display apparatus according to the exemplary embodiment includes a controller 810, a data driver 820, and a transmitter 830.

The controller 810 converts the image signal input from the outside into image signal data for driving the data driver 820.

The data driver 820 processes the image signal data input from the controller 810 to generate an address pulse and supply the address pulse to the address electrode.

The transmitter 830 transmits the image signal data converted by the controller 810 to the data driver 520. The transmitter 830 according to an exemplary embodiment may vary the base voltage levels before and after transmission by plotting and transmitting image signal data. That is, the control unit 810 may use the first base voltage as the base voltage, and the data driver 820 may use the second base voltage having a different voltage level from the first base voltage as the base voltage.

For example, the capacitor C is used as the transmitter 830 for transmitting the image signal data from the controller 810 to the data driver 820. Here, the image signal data ⓐ of the first base voltage supplied from the control unit 810 uses the ground level GND as the base voltage. In this case, the capacitor C blocks a direct current (DC) component among the image signal data ⓐ of the first ground voltage supplied from the control unit 810, and then only an AC component, that is, a high frequency digital signal. Passed. When the first voltage Va- is supplied through the first voltage supply unit 831 included in the data driver 830, that is, the first switch Q1 connected to the first voltage source VA−, the capacitor C The image signal data passing through is placed on the first voltage Va- like the image signal data ⓑ of the second base voltage by the resistor R connected between the capacitor C and the first switch Q1. It is lost and sent. That is, the image signal data supplied from the control unit 810 and the image signal data passing through the capacitor C have different base voltages.

Accordingly, the floating transmission is performed through the transmitter 830 including the capacitor C connected to the control unit 810 and the resistor R connected between the capacitor C and the first voltage supply path of the data driver 820. As a result, any voltage may be supplied to the address electrode without limiting the breakdown voltage of the data driver 820.

As a result, the data driver 820 according to an exemplary embodiment of the present invention may include a first voltage supply 821 for supplying a first voltage Va− and a difference between the first voltage and the address discharge voltage according to the floated image signal data. The second voltage supply unit 822 is configured to supply a second voltage Va + having a voltage.

9 is a diagram for describing a data driver according to another exemplary embodiment of the present invention.

As shown in FIG. 9, the plasma display apparatus according to another embodiment of the present invention includes a controller 910, a data driver 920, and a transmitter 930.

The controller 910 converts the image signal input from the outside into image signal data for driving the data driver 920.

The data driver 920 processes the image signal data input from the controller 910 to generate an address pulse and supply the address pulse to the address electrode.

The transmitter 930 transmits the image signal data converted by the controller 910 to the data driver 920. The transmitter 930 according to an exemplary embodiment may vary the base voltage levels before and after transmission by plotting and transmitting image signal data. That is, the control unit 910 may use the first base voltage as the base voltage, and the data driver 920 may use the second base voltage having a different voltage level from the first base voltage as the base voltage.

For example, in another embodiment of the present invention, any one of an optical fiber 931 or a photo coupler 932 may be used as the transmitter 930 to plot the image signal data. Fiber optic or photocouplers are the means by which electrical signals can be converted into signals of light. Therefore, the image signal data is transformed into a signal form of light and transmitted in a floating state where the concept of ground level is not necessary. In another embodiment of the present invention, the image signal data is transmitted in a floating state at a relative voltage value by using a differential signaling method (not shown). The differential signaling method selectively uses any one of Low Voltage Differential Signaling (LVSD) or Transition Minimized Differential Signaling (TMDS). As such, the image signal data may be plotted using any one of an optical fiber, a photo coupler, and a differential signal method. Moreover, it can also be used in parallel with each other.

As such, the driving circuit of the scan driver may be minimized by the setup voltage and the scan voltage supply and data floating. In addition, an arbitrary change in the setup voltage, the scan voltage supply, and data floating may adjust the driving circuit minimization degree of the scan driver.

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

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

As described above, the present invention has the effect of reducing the manufacturing cost by improving the plasma display device.

In addition, the present invention has the effect of reducing the number of switching elements by improving the plasma display device.

In addition, the present invention has an effect of lowering the breakdown voltage of the switching element by improving the plasma display device.

Claims (13)

A plasma display panel having a scan electrode and an address electrode intersecting the scan electrode; A scan driver configured to supply a setup pulse consisting of a sum of a sustain voltage and a scan reference voltage to the scan electrode; And A data driver configured to supply an address pulse rising from the first positive voltage to the second voltage to the address electrode Wherein the data driver supplies the first voltage during a set down period of a reset period. delete The method of claim 1, The scan driver And a setdown pulse or a scan pulse supplied to the scan electrode with a minimum voltage level equal to or greater than ground level. The method of claim 1, And the setup pulse gradually rises from the sustain voltage to the sum of the sustain voltage and the scan reference voltage. The method of claim 1, The scan driver A setup voltage and a scan reference voltage supply unit supplying the setup voltage to the scan electrode during a reset period and supplying the scan reference voltage during an address period; A set-down voltage supply unit supplying the scan electrode with a set-down voltage which is less than the setup voltage level and equal to or greater than the ground voltage level during the reset period; A scan voltage supply unit configured to supply a scan voltage to the scan electrode that is less than the scan reference voltage level and equal to or greater than a ground voltage level during an address period; And A sustain voltage supply unit supplying a sustain voltage to the scan electrode during a sustain period. Plasma display device comprising a. The method of claim 5, The setup voltage and scan reference voltage supply unit A capacitor connected with the scan reference voltage source to store the scan reference voltage supplied from the scan reference voltage source; And A setup and scan common switch, one end of which is commonly connected to the capacitor and the scan reference voltage source, and the other end of which is connected to a driving pulse output connected to the scan electrode. Plasma display device comprising a. The method of claim 6, The setup and scan common switch And turn on in the setup period of the reset period to supply the setup voltage, and turn on in the address period to supply the scan reference voltage. The method of claim 5, And when the lowest voltage level of the setdown pulse or the scan pulse is a ground level, the setdown voltage supply unit or the scan voltage supply unit is connected to a ground voltage source. The method of claim 1, A control unit for converting an image signal input from the outside into image signal data for driving the data driver; And a transmitter configured to transmit the image signal data by floating the controller from the controller to the data driver. The method of claim 9, And the transmitting unit includes a capacitor connected to the control unit and a resistor connected between the capacitor and the first voltage supply path of the data driver. The method of claim 9, And the transmitting unit uses any one of an optical fiber and a photo coupler. The method according to claim 9 or 11, And the transmitting unit transmits the control signal in a differential signal manner. The method of claim 9, The data driver And a second voltage supply unit supplying the first voltage and a second voltage supply unit supplying the second voltage having a difference between the first voltage and the address discharge voltage according to the floated image signal data. Plasma display device.

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