KR100844858B1 - Plasma Display Apparatus and Driving Method there of - Google Patents

Abstract

The present invention relates to a display device, and more particularly, to a plasma display device and a driving method thereof.

A plasma display device according to an embodiment of the present invention includes a plasma display panel including an address electrode; A driving voltage supply unit for supplying a driving voltage to the address electrode; And a data drive integrated circuit formed in a path between the driving voltage supply unit and the address electrode to control the driving voltage supplied to the address electrode with one switch element and to block a displacement current flowing through the address electrode. Drive IC).

A driving method of a plasma display apparatus including an address electrode, the method comprising: controlling an output of a driving voltage including a data voltage and a base voltage supplied to the address electrode with one switch element; And blocking the displacement current flowing into the driving unit through the address electrode.

Description

Plasma Display Apparatus and Driving Method there of}

1 is a diagram illustrating a configuration of a data driver in a conventional plasma display apparatus.

2 is a view showing an example of the plasma display device of the present invention.

3 is a view showing an example of the structure of a plasma display panel of the present invention.

4 is a view showing an example of a driving method of the plasma display device of the present invention.

5 is a diagram showing an example of a driving waveform of the plasma display device of the present invention.

6 is a diagram illustrating an example of a configuration of a data driver of a plasma display device according to the present invention.

7A is a diagram illustrating a data driver of a plasma display device according to a first embodiment of the present invention.

FIG. 7B is a timing diagram for describing an operation of a data driver according to the first exemplary embodiment of FIG. 7A.

8A illustrates a data driver of a plasma display device according to a second embodiment of the present invention.

FIG. 8B is a timing diagram for describing an operation of the data driver according to the second exemplary embodiment of FIG. 8A.

9 is a diagram for describing a displacement current generated when the plasma display apparatus is driven.

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

200: plasma display panel 221: control unit

222: data driver 223: scan driver

224: sustain driver 225: drive voltage generator

The present invention relates to a display device, and more particularly, to a plasma display device and a driving method thereof.

In general, a plasma display apparatus is formed by attaching a plasma display panel for displaying an image and a driving unit for driving the plasma display panel to a rear surface of the plasma display panel.

In general, a plasma display panel is a partition wall formed between a front panel and a rear panel to form a unit discharge cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He). An inert gas containing a main discharge gas such as and a small amount of xenon is filled. A plurality of unit discharge cells described above are gathered to form one pixel. For example, a red (R) cell, a green (G) cell, and a blue (B) cell may form one pixel.

When a high frequency voltage is applied to such a unit discharge cell to discharge, an inert gas generates vacuum ultra violet rays and emits phosphors formed between the partition walls to realize an image.

The plasma display panel includes a plurality of electrodes, for example, a scan electrode (Y), a sustain electrode (Z), and an address electrode (X), each of which has driving parts for supplying a driving voltage to the electrodes of the plasma display panel. Is connected to.

Each driving unit implements an image by supplying driving pulses, such as a reset pulse in a reset period, a scan pulse in an address period, and a sustain pulse in a sustain period, to the electrodes of the plasma display panel during a predetermined period in driving the plasma display panel. will be. Such a plasma display device has a spotlight as a display device because of its thin and light configuration.

On the other hand, the configuration of the drive unit is closely related to the drive characteristics. In addition, research on a driving circuit that can provide a reliability of driving while lowering the manufacturing cost is constantly progressing.

For example, the driving unit of the address electrode is shown in FIG. 1.

1 is a diagram illustrating a configuration of a data driver in a conventional plasma display apparatus.

As shown in FIG. 1, the voltage supply controllers 100, 101, and 102 that control the supply of the data voltage Va and the ground voltage GND to the address electrode in the data driver, for example, are provided in the drive IC. It is formed in the form.

The drive IC may include top switches Qt1, Qt2 and Qt3 for controlling the supply of the data voltage Va and bottom switches Qb1 and Qb2 for controlling the supply of the base voltage GND. , Qb3). The top switches Qt1, Qt2 and Qt3 and the bottom switches Qb1, Qb2 and Qb3 are connected in series to each other to control voltages supplied to the unit address electrodes X1, X2 and X3. For example, the first top switch Qt1 and the first bottom switch Qb1 are connected in series to control the voltage supplied to the first address electrode X1.

The top switches Qt1, Qt2 and Qt3 and the bottom switches Qb1, Qb2 and Qb3 form a plurality of pairs to form a single data drive IC.

Here, in order to control the voltage supplied to one address electrode, a top switch and a bottom switch, that is, two switch elements are required. Therefore, there is a problem that the number of required switch elements is increased.

In addition, switch devices used in such data drive integrated circuits require relatively high breakdown voltage characteristics. Since the devices having high breakdown voltage characteristics are relatively expensive, the manufacturing cost of the plasma display device is further increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display device and a method of driving the same, which can reduce manufacturing costs.

An object of the present invention is to provide a plasma display device and a driving method thereof which can improve driving efficiency.

The technical problem of the present invention is not limited to the above-mentioned thing, and another technical problem to be achieved by the present invention will be clearly understood by those skilled in the art by the effect of the configuration of the present invention.

According to an aspect of the present invention, there is provided a plasma display apparatus including a plasma display panel including an address electrode; A driving voltage supply unit for supplying a driving voltage to the address electrode; And a data drive integrated circuit formed in a path between the driving voltage supply unit and the address electrode and controlling the driving voltage supplied to the address electrode with one switch element and blocking a displacement current flowing through the address electrode. Data Drive IC).

The data drive IC may include a driving voltage controller including the one switch element and a displacement current blocking unit having one end connected to the driving voltage controller and the address electrode in common.

One switch element of the driving voltage controller is a field effect transistor (FET), and an internal diode of the field effect transistor has an anode terminal connected to the address electrode and a cathode terminal driving the drive electrode. It is characterized in that the connection with the voltage supply.

The driving voltage supply unit may include a data voltage supply unit and a base voltage supply unit.

The data voltage supply unit includes a first switch unit connected to one end of the data voltage supply source, and the base voltage supply unit includes a second switch connected to one end of the base voltage supply source, and the other end of the first switch and the second switch of the second switch. The other end is connected to one end of the driving voltage control unit.

The data voltage is supplied to the address electrode when the first switch unit and the field effect transistor are turned on.

The first switch unit and the field effect transistor are turned off, and when the second switch unit is turned on, a base voltage is supplied to the address electrode.

After the ground voltage is supplied to the address electrode, when the first switch unit is turned on, and the second switch unit and the field effect transistor are turned off, the address electrode is turned on. It is characterized in that the ground voltage is floated.

The driving voltage supply unit may include a data voltage supply unit, a base voltage supply unit, and a bias voltage supply unit.

The bias voltage supplied by the bias voltage supply unit to the address electrode is characterized in that the discharge start voltage or less.

The bias voltage supplied by the bias voltage supply unit to the address electrode is characterized in that 40V or less.

The data voltage supply part includes a first switch part connected to one end of the data voltage supply source, the base voltage supply part includes a second switch connected to one end of the base voltage supply source, and the bias voltage supply part is connected to one end of the bias voltage source. And a third switch, wherein the other end of the first switch, the other end of the second switch, and the other end of the third switch are connected to one end of the driving voltage controller.

The displacement current blocking unit includes a diode element, a cathode end of the diode is commonly connected to the driving voltage control unit and the address electrode, and an anode end of the diode is connected to a ground unit. It is done.

The data voltage is supplied to the address electrode when the first switch unit and the field effect transistor are turned on.

The first switch unit and the field effect transistor are turned off, and when the third switch unit is turned on, a bias voltage is supplied to the address electrode.

After the bias voltage is supplied to the address electrode, when the first switch unit is turned on and the third switch unit and the field effect transistor are turned off, the address electrode is configured to be turned off. The bias voltage is characterized in that the floating.

According to another aspect of the present invention, there is provided a plasma display apparatus including a plasma display panel including a plurality of address electrodes; A driving voltage supply unit for supplying driving voltages to the plurality of address electrodes; And a data drive integrated circuit configured to control the driving voltage supplied to the address electrode with a unit switch element formed in a path between the driving voltage supply unit and the plurality of address electrodes, and to block a displacement current flowing through the address electrode. Data Drive IC).

The data drive integrated circuit may include a driving voltage controller including a plurality of unit switch elements corresponding to the plurality of address electrodes, and a plurality of terminals of which one end is commonly connected to the driving voltage controller and the plurality of address electrodes, respectively. It characterized in that it comprises a displacement current blocking unit.

In the driving method of the plasma display device including the address electrode according to another embodiment of the present invention for achieving the above object, the output of the driving voltage including the data voltage and the ground voltage supplied to the address electrode Controlling the switch element and blocking the displacement current flowing into the driving unit through the address electrode.

The driving voltage supplied to the address electrode further includes a bias voltage equal to or less than a discharge start voltage, and the diode blocks the displacement current flowing into the driving unit through the address electrode.

Hereinafter, with reference to the accompanying drawings will be described in more detail the configuration of the plasma display panel according to the present invention.

2 is a view showing an example of the plasma display device of the present invention.

As shown in FIG. 2, the plasma display apparatus according to the present invention includes a plasma display panel 200, a driver for driving electrodes formed on the plasma display panel 200, and a controller 221 for controlling the driver. And a driving voltage generator 225 for supplying driving voltages necessary for the driving units 222, 223, and 224.

The driver includes a data driver 222 for supplying data to the data electrodes X1 to Xm, a scan driver 223 for driving the scan electrodes Y1 to Yn, and sustain electrodes as common electrodes. And a sustain driver 224 for driving Z).

The plasma display panel 200 is bonded to the upper substrate (not shown) and the lower substrate (not shown) at regular intervals, and a plurality of electrodes, for example, scan electrodes Y1 to Yn and a sustain electrode, are, for example, attached to the upper substrate. (Z) is formed in pairs, and the data electrodes X1 to Xm are formed on the lower substrate to intersect the scan electrodes Y1 to Yn and the sustain electrode Z.

An example of the structure of the plasma display panel will be described in detail with reference to FIG. 3 to help understanding of the present invention.

3 is a view showing an example of the structure of a plasma display panel of the present invention.

As shown in FIG. 3, the plasma display panel includes a plurality of holding electrodes formed by pairing scan electrodes 302 and Y and sustain electrodes 303 and Z on the front substrate 301, which is a display surface on which an image is displayed. The rear panel 310, in which a plurality of address electrodes 313 and X are arranged so as to intersect the plurality of storage electrode pairs described above, on the front panel 300 having the electrode pairs arranged thereon and the rear substrate 311 forming the rear surface thereof, may be a predetermined distance. Are coupled in parallel.

The front panel 300 is, for example, the scan electrodes 302 and Y and the sustain electrodes 303 and Z for mutually discharging and maintaining light emission of the cells in one discharge cell, that is, a transparent electrode formed of a transparent ITO material. And the scan electrodes 202 and Y and the sustain electrodes 303 and Z provided as a bus electrode b made of a metal material may be included in pairs. It is also possible to form only the transparent electrode a or only the bus electrode b. Scan electrodes 302 and Y and sustain electrodes 303 and Z are covered by one or more top dielectric layers 304 that limit the discharge current and insulate the electrode pairs, and the top dielectric layer 304 is top discharged. In order to facilitate the condition, for example, a protective layer 305 on which magnesium oxide (MgO) is deposited is formed.

In the rear panel 310, for example, stripe-type or well-type partition walls 312 for forming a plurality of discharge spaces, that is, discharge cells are arranged in parallel. In addition, a plurality of address electrodes 313 and X for performing address discharge to generate vacuum ultraviolet rays are arranged in parallel with the partition 312. On the upper side of the rear panel 310, R, G, and B phosphors 314 that emit visible light for image display during address discharge are coated. A lower dielectric layer 315 is formed between the data electrodes 213 and X and the phosphor 314 to protect the data electrodes 313 and X.

The front panel 300 and the rear panel 310 formed as described above are bonded to each other through a sealing process to form a plasma display panel. The plasma display panel is provided with a driving unit for driving a plurality of electrodes, for example, electrodes such as scan electrodes 302 and Y, sustain electrodes 303 and Z, and address electrodes 313 and X. To achieve.

A method of driving the plasma display apparatus of the present invention as described above is as shown in FIG. 4.

4 is a view showing an example of a driving method of the plasma display device of the present invention.

As shown in FIG. 4, in order to implement an image on the plasma display panel, the plasma display apparatus of the present invention may be driven by dividing one frame into a plurality of subfields. For example, each subfield may be divided into a reset period for initializing all cells, an address period for selecting a cell to be discharged, and a sustain period for implementing gray levels according to the number of discharges.

For example, when displaying an image with 256 gray levels, a frame period (16.67 ms) corresponding to 1/60 second is divided into a plurality of subfields SF1 to SF8. Each of the eight subfields SF1 to SF8 is divided into a reset period RP, an address period AP, and a sustain period SP as described above. In this case, while the reset period RP and the address period AP of each subfield are the same for each subfield, the sustain period and the number of sustain pulses allocated thereto may be different. For example, gray levels may be expressed by increasing the ratio of 2 ⁿ (n = 0,1,2,3,4,5,6,7) in each subfield.

As such, an example of a basic panel structure of the plasma display apparatus and an example of a driving method for implementing an image have been described. Hereinafter, an example of the plasma display device of the present invention of FIG. 2 will be described.

The scan driver 223 performs a reset pulse for initializing the wall charge states of all the discharge cells in the previous subfield during the reset period under the control of the controller 221, for example, a setup pulse that is a rising ramp waveform and a setdown pulse that is a falling ramp waveform. Supply to scan electrodes Y1 to Yn.

In addition, the scan driver 223 sequentially scan pulses of the scan voltage (−Vy) to the scan electrodes Y1 to Yn while maintaining the scan bias voltage Vsc during the address period under the control of the control unit 221. To supply.

Further, under the control of the control unit 221, the scan driver 223 may alternately apply a sustain pulse to the sustain pulse supplied by the sustain driver 224, which will be described later, to generate sustain discharge.

The data driver 222 is subjected to inverse gamma correction and error diffusion by an inverse gamma correction circuit, an error diffusion circuit, and the like, and then data mapped to each subfield is supplied by the subfield mapping circuit. The data driver 222 samples and latches data in response to the timing control signal CTRX of the controller 221, and then supplies the data to the address electrodes X1 to Xm. According to such data, a discharge cell that is turned on / off, i.e., a cell that generates sustain discharge, which is a display discharge, is selected in the sustain period. Here, in the embodiment of the present invention, there is a feature in the configuration of the data driver 222, which will be described in detail below with reference to FIG.

When the sustain pulse is applied to the discharge cell supplied with the data pulse in the sustain period, which will be described later, wall charges such that sustain discharge is generated are formed.

The sustain driver 224, for example, supplies the positive voltage Vz to the sustain electrodes Z under the control of the control unit 221.

In addition, the sustain driver 224 has a sustain drive circuit provided therein during the sustain period as described above and alternately operates with the sustain drive circuit provided in the scan driver 223 to sustain the sustain pulse Vs. Will be supplied to

The control unit 221 receives the vertical / horizontal synchronization signal and the clock signal and receives timing control signals for controlling the operation timing and synchronization of the driving units 222, 223, and 224 in the reset period, the address period, and the sustain period. Each driver is controlled by generating CTRX, CTRY, and CTRZ and supplying the timing control signals CTRX, CTRY, and CTRZ to the corresponding drivers 222, 223, and 224.

The data control signal CTRX includes a sampling clock for sampling data, a latch control signal, a switch control signal for controlling on / off time of the sustain driving circuit and the driving switch element. The scan control signal CTRY includes a switch control signal for controlling the on / off time of the sustain driving circuit in the scan driver 123 and the driving switch element, and the sustain control signal CTRZ includes the sustain in the sustain driver 124. A switch control signal for controlling the on / off time of the driving circuit and the driving switch element is included.

The driving voltage generator 225 generates a setup voltage Vsetup, a scan common voltage Vsc, a scan voltage -Vy, a sustain voltage Vs, a data voltage Va, and the like. These driving voltages may vary depending on the composition of the discharge gas or the structure of the discharge cell.

The configuration of the plasma display device of the present invention described above is an embodiment for the convenience of understanding, and the configuration of the present invention is not limited thereto. In other words, even if the configuration and operation of the driving device are somewhat varied, the configuration and the role of the driving unit of the present invention shown in the claims are considered to be included in the present invention.

5 is a diagram showing an example of a driving waveform of the plasma display device of the present invention.

As shown in FIG. 5, a driving waveform in one subfield SF among a plurality of subfields implemented by the plasma display apparatus according to an exemplary embodiment of the present invention is shown.

The subfield SF includes a reset period RP for initializing discharge cells of all screens, an address period AP for selecting discharge cells, and a sustain period SP for implementing images by maintaining discharge of the selected discharge cells. Are divided into

In the reset period RP, the high rising ramp waveform PR is simultaneously applied to the scan electrode Y lines in the setup period SU. This rising ramp waveform PR causes a weak discharge (setup discharge) to occur in the cells on the full screen, thereby generating wall charges in the cells. The rising ramp waveform PR may be supplied as a sum of the sustain voltage Vs and the scan reference voltage Vsc.

In the set down period SD, the falling ramp waveform NR is simultaneously applied to the scan electrode Y lines. This falling ramp waveform NR causes a weak erase discharge in the cells, thereby making the wall charges of the excessively accumulated discharge cells generated by the setup discharge uniform.

In the address period AP, a scan pulse SCNP having a voltage of -Vy is applied to the scan electrode Y lines and a data pulse DP is applied to the address electrode X lines. As the voltage difference between the scan pulse SCNP and the data pulse DP and the wall voltage generated in the reset period RP are added, an address discharge is generated in the cell to which the data pulse DP is applied. Wall charges are generated in the cells selected by the address discharge.

Here, in the embodiment of the present invention, a data pulse driving method can be adjusted differently from the conventional method, which will be described in detail below with reference to FIG. 7.

On the other hand, the positive voltage Vz is applied to the sustain electrode Z lines to maintain a voltage that does not cause discharge with the scan electrode Y.

In the sustain period SP, a sustain pulse SUSP is applied to the scan electrode Y and the sustain electrode Z alternately to generate sustain discharge.

Hereinafter, the configuration and operation of a data driver of a plasma display apparatus according to an exemplary embodiment of the present invention will be described in detail.

6 is a diagram illustrating an example of a configuration of a data driver of a plasma display device according to the present invention.

As shown in FIG. 6, the data driver is formed in the driving voltage supply unit for supplying the driving voltage to the plurality of address electrodes X1 and X2 .. and in the path between the driving voltage supply unit and the address electrode. And a data drive IC controlling the driving voltage supplied to the address electrode and blocking a displacement current flowing through the address electrode.

For example, the driving voltage supply unit may include a data voltage supply unit 610 for supplying a data voltage Va and a base voltage supply unit 620 for supplying a base voltage GND. Here, the bias voltage supply unit 630 may be further included.

The data drive integrated circuit 600 may include a driving voltage controller 601, a displacement current blocking unit 602 having one end connected in common to the driving voltage controller 601 and an address electrode.

The data voltage supply unit 610 includes a first switch unit S1 having one end connected to the data voltage supply source Va.

The base voltage supply unit 620 includes a second switch S2 having one end connected to the base voltage source GND.

The bias voltage supply unit 630 includes a third switch S3 having one end connected to the bias voltage source Vb.

The other end of the first switch S1, the other end of the second switch S2, and the other end of the third switch S3 are connected to one end of the driving voltage controller 601.

The driving voltage controller 601 includes switch elements DS1 and DS2 connected to the address electrodes X1 and X2 to control the driving voltages supplied to the address electrodes.

The switch elements DS1 and DS2 may be formed of, for example, field effect transistors (FETs). The anode terminal of the internal diode of the field effect transistor is connected to the address electrode, and the cathode terminal is the driving voltage supply unit, that is, the data voltage supply unit 610, the base voltage supply unit 620, and the bias voltage supply unit 630. And connected in common to utilize the operation of the internal diode, a detailed description will be described later in FIG.

The displacement current blocking unit 602 may be formed of, for example, diode elements Dc1 and Dc2. The cathode terminals of the diodes Dc1 and Dc2 are commonly connected to the driving voltage control unit 601 and the address electrodes X1 and X2, and the anode terminals are connected to the ground portion GND to connect the address electrodes. The damage to the circuit can be minimized by blocking the displacement current flowing through it.

Such a data driver of the plasma display apparatus according to the exemplary embodiment may reduce manufacturing costs by reducing the number of switch elements. That is, a top switch and a bottom are connected to control a driving voltage supplied to one conventional address electrode by controlling a voltage supplied by the driving voltage supply unit by connecting one unit switch element to each of the plurality of address electrodes. Compared to using a switch, the number of switch elements can be significantly reduced.

In addition, when the driving voltage is applied to the other electrodes, for example, when the driving voltage is applied to the sustain electrode or the scan electrode, the displacement current generated due to the voltage change may be introduced through the address electrode. Through the 602, the displacement current flowing into the data drive integrated circuit 600 through the address electrode may be blocked. Thereby, a circuit element can be protected and the reliability of a circuit operation | movement can be improved. In addition, the breakdown voltage characteristics of the device can be lowered, and manufacturing cost can be saved as well.

Looking at another embodiment of the present invention and the operation timing diagram thereof as described above schematically as shown in FIG.

7A is a diagram illustrating a data driver of a plasma display device according to a first embodiment of the present invention.

As shown in FIG. 7A, the data driver may include driving voltage supply parts 710 and 720, driving voltage supply parts 710 and 720, and address electrodes X1, to supply driving voltages to the plurality of address electrodes X1 and X2. And a data drive integrated circuit 700 formed in a path between X2) to control the driving voltage supplied to the address electrode with one switch element and to block the displacement current flowing through the address electrode. do.

For example, the driving voltage supply unit may include a data voltage supply unit 710 for supplying a data voltage Va and a base voltage supply unit 720 for supplying a base voltage GND.

The data drive integrated circuit 700 may include a driving voltage controller 701 and a displacement current blocking unit 702 having one end connected to the driving voltage controller 701 and the address electrode in common.

The data voltage supply unit 710 includes a first switch unit S1 having one end connected to the data voltage supply source Va.

The base voltage supply unit 720 includes a second switch S2 having one end connected to the base voltage source GND.

The other end of the first switch S1, the other end of the second switch S2, and the other end of the third switch S3 are connected to one end of the driving voltage controller 701.

The driving voltage controller 701 includes switch elements DS1 and DS2 connected to the address electrodes X1 and X2 to control the driving voltages supplied to the address electrodes.

Here, the switch elements DS1 and DS2 may be formed as field effect transistors (FETs), for example. The anode terminal of the internal diode of the field effect transistor is connected to the address electrode, and the cathode terminal is commonly connected to the driving voltage supply, that is, the data voltage supply 610 and the base voltage supply 620, Operation may be utilized, which will be described in detail with reference to FIG. 7B.

The displacement current blocking unit 702 may be formed of, for example, diode elements Dc1 and Dc2. The cathode terminals of the diodes Dc1 and Dc2 are commonly connected to the driving voltage controller 701 and the address electrodes X1 and X2, and the anode terminals are connected to the ground portion GND. The damage to the circuit can be minimized by blocking the displacement current flowing through it.

The operation timing diagram of FIG. 7A will be described with reference to FIG. 7B.

FIG. 7B is a timing diagram illustrating an operation of a data driver according to the first exemplary embodiment of FIG. 7A.

As shown in FIG. 7B, the first switch unit S1 of the data voltage supply unit 710 is turned on, and the data drive integrated circuit 700 is connected to each of the address electrodes X1 and X2. When the first field effect transistor DS1 of the driving voltage controller 701 controlling the outputs Out1 and Out2 is turned on, the data voltage Va is output to the first address electrode X1. Accordingly, the output 1 Out1 of the first address electrode X1 of FIG. 7B becomes the data voltage Va.

Thereafter, the first switch unit S1 of the data voltage supply unit 710 and the first field effect transistor DS1 of the driving voltage control unit 701 are turned off, and the first voltage of the base voltage supply unit 720 is turned off. When the switch part S2 is turned on, the base voltage is supplied to the address electrodes X1 and X2. In this case, the second switch unit S2 may maintain a turn-on state for a td time. Accordingly, the outputs Out1 and Out2 of the first address electrode X1 and the second address electrode X2 of FIG. 7B become the ground voltage GND. At this time, the second field effect transistor DS2 of the driving voltage controller 701 which controls the outputs Out1 and Out2 from the data drive integrated circuit 700 to the respective address electrodes X1 and X2 is turned on. It may be on or turned off.

That is, the base voltage of the base voltage supply unit 720 may be supplied to the first and second address electrodes X1 and X2 through the paths of the internal diodes of the first and second field effect transistors DS1 and DS2. For example, an anode terminal of the internal diode may be connected to an address electrode, and a cathode terminal may be commonly connected to a driving voltage supply unit, that is, the data voltage supply unit 610 and the base voltage supply unit 620 to form a path. It is. This eliminates the need for a separate switch element for controlling the supply of the base voltage as in the prior art.

Subsequently, the second switch unit of the base voltage supply unit 720 is turned off, and the first field switch transistor S1 of the data voltage supply unit 710 and the second field effect transistor 701 of the driving voltage controller 701 are turned off. When DS2 is turned on, the data voltage Va is output to the second address electrode X2. Accordingly, the output 2 Out2 of the second address electrode X2 of FIG. 7B becomes the data voltage Va. Here, since the first field effect transistor DS1 is in a turn-off state, the first address electrode X2 maintains the base voltage level that has been present between the two. That is, since the ground voltage is in a floating state, the noise is reduced than in the prior art, so that it can be driven at a lower breakdown voltage condition.

8A illustrates a data driver of a plasma display device according to a second embodiment of the present invention. As shown in FIG. 8A, the data driver may include driving voltage supply units 810, 820, and 830, driving voltage supply units 810, 820, and 830 for supplying driving voltages to the plurality of address electrodes X1 and X2. A data drive IC formed in a path between the electrodes X1 and X2 and controlling the driving voltage supplied to the address electrode with a single switch element and blocking a displacement current flowing through the address electrode; 800).

For example, the driving voltage supply unit may include a data voltage supply unit 810 supplying a data voltage Va and a base voltage supply unit 820 supplying a base voltage GND. Here, the bias voltage supply unit 830 may be further included.

The data drive integrated circuit 800 may include a driving voltage controller 801, a displacement current blocking unit 802 having one end connected in common to the driving voltage controller 701 and the address electrode.

The data voltage supply unit 810 includes a first switch unit S1 having one end connected to the data voltage supply source Va.

The base voltage supply unit 820 includes a second switch S2 having one end connected to the base voltage source GND.

The bias voltage supply unit 830 includes a third switch S3 having one end connected to the bias voltage source Vb.

The other end of the first switch S1, the other end of the second switch S2, and the other end of the third switch S3 are connected to one end of the driving voltage controller 801.

The driving voltage controller 801 includes switch elements DS1 and DS2 connected to the address electrodes X1 and X2 to control the driving voltage supplied to the address electrodes.

The displacement current blocking unit 802 may be formed of, for example, diode elements Dc1 and Dc2. The cathode terminals of the diodes Dc1 and Dc2 are commonly connected to the driving voltage control unit 801 and the address electrodes X1 and X2, and the anode terminals are connected to the ground unit GND to connect the address electrodes. The damage to the circuit can be minimized by blocking the displacement current flowing through it.

The operation timing diagram of FIG. 8A will be described with reference to FIG. 8B.

FIG. 8B is a timing diagram for describing an operation of the data driver according to the second exemplary embodiment of FIG. 8A.

As shown in FIG. 8B, the first switch unit S1 of the data voltage supply unit 810 is turned on, and the data drive integrated circuit 800 is connected to each of the address electrodes X1 and X2. When the first field effect transistor DS1 of the driving voltage controller 801 controlling the outputs Out1 and Out2 is turned on, the data voltage Va is output to the first address electrode X1. As a result, the output 1 Out1 of the first address electrode X1 of FIG. 8B becomes the data voltage Va.

Thereafter, when the first switch unit S1 of the data voltage supply unit 810 is turned off and the third switch unit S3 of the bias voltage supply unit 830 is turned on, the address electrode is turned on. The bias voltage Vb is supplied to (X1, X2). In this case, the third switch S3 may maintain a turn-on state for the td time. In addition, the first field effect transistor DS1 of the driving voltage controller 801 may be in a turn-on state or a turn-off state. Even in the turn-off state, the bias voltage Vb may be supplied by the internal diode. Accordingly, the output Out1 of the first address electrode X1 of FIG. 8B becomes the bias voltage Vb level.

Thereafter, the third switch unit S3 of the bias voltage supply unit 630 is turned off, and the first switch unit S1 of the data voltage supply unit 810 and the second of the driving voltage control unit 801 are turned off. When the field effect transistor DS2 is turned on, the data voltage Va is supplied to the second address electrode X2. In this case, the first address electrode X1 maintains the bias voltage Vb level. That is, due to the turn-off state of the first field effect transistor DS1, the first address electrode X1 may maintain the bias voltage Vb that is present between them in a floating state. As a result, the noise is reduced compared to the related art, and it is possible to operate at a lower withstand voltage condition.

As described above, since the magnitude of the voltage supplied to the address electrode is the magnitude of the difference between the data voltage Va and the bias voltage Vb, the voltage change is reduced. Therefore, noise can be minimized and manufacturing cost can be reduced by reducing the breakdown voltage condition of the driving device. In addition, low voltage driving can be performed. Here, the bias voltage Vb may be equal to or less than the discharge start voltage. For example, it can be set to 40V or less. That is, if the data voltage is 70V and the discharge start voltage is 40V, the bias voltage Vb can be set at 40V or less, so that the breakdown voltage of the device is required only 30V. In this manner, even if the address electrode maintains the bias voltage Vb level, discharge does not occur, thereby providing reliability of operation.

9 is a diagram for describing a displacement current generated when the plasma display apparatus is driven.

As shown in Fig. 9, for example, a sustain pulse Vs applied to the scan electrode Y and the sustain electrode Z is shown. The displacement current is generated due to the voltage change of each scan electrode Y and the sustain electrode Z. FIG. Such a displacement current may flow into the data drive integrated circuit through the address electrode X and cause a large damage. The displacement current may be changed through the configuration of the displacement current blocking units 602, 702, and 802 according to an embodiment of the present invention. Can be blocked. This protects the circuit elements and improves the reliability of driving.

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 plasma display device and the driving method thereof of the present invention have the effect of reducing the manufacturing cost.

In addition, the plasma display device and the driving method thereof of the present invention have the effect of improving the driving efficiency.

In addition, the plasma display device and the driving method thereof of the present invention have the effect of protecting the circuit elements.

Claims (20)

A plasma display panel including an address electrode; A driving voltage supply unit for supplying a driving voltage to the address electrode; And A data drive integrated circuit formed in a path between the driving voltage supply unit and the address electrode and controlling the driving voltage supplied to the address electrode with a single switch element and blocking a displacement current flowing through the address electrode; IC); The driving voltage supply unit includes a data voltage supply unit, a base voltage supply unit, and a bias voltage supply unit. The method of claim 1, The data drive integrated circuit (Data Drive IC) And a displacement current blocking unit having one end connected in common to the driving voltage control unit and the address electrode. The method of claim 1, One switch element of the driving voltage controller is a field effect transistor (FET), and an internal diode of the field effect transistor has an anode terminal connected to the address electrode and a cathode terminal driving the drive electrode. And a plasma display device. Claim 4 was abandoned when the registration fee was paid. The method of claim 3, wherein The driving voltage supply unit includes a data voltage supply unit and a base voltage supply unit. The method of claim 4, wherein The data voltage supply part includes a first switch part connected to one end of the data voltage supply source, and the base voltage supply part includes a second switch connected to one end of the base voltage supply source. And the other end of the first switch and the other end of the second switch are connected to one end of the driving voltage controller. Claim 6 was abandoned when the registration fee was paid. The method of claim 5, wherein And a data voltage is supplied to the address electrode when the first switch unit and the field effect transistor are turned on. Claim 7 was abandoned upon payment of a set-up fee. The method of claim 5, wherein And the base voltage is supplied to the address electrode when the first switch unit and the field effect transistor are turned off and the second switch unit is turned on. Claim 8 was abandoned when the registration fee was paid. The method of claim 7, wherein After the ground voltage is supplied to the address electrode, when the first switch unit is turned on, and the second switch unit and the field effect transistor are turned off, the address electrode is turned on. And a ground voltage is floated. delete The method of claim 1, And a bias voltage supplied from the bias voltage supply unit to the address electrode is equal to or less than a discharge start voltage. The method of claim 10, And a bias voltage supplied by the bias voltage supply unit to the address electrode is 40V or less. The method of claim 1, The data voltage supply part includes a first switch part connected to one end of the data voltage supply source, the base voltage supply part includes a second switch connected to one end of the base voltage supply source, and the bias voltage supply part is connected to one end of the bias voltage source. A third switch, And the other end of the first switch, the other end of the second switch, and the other end of the third switch are connected to one end of the driving voltage controller. The method of claim 5 or 12, The displacement current blocking unit includes a diode element, a cathode end of the diode is commonly connected to the driving voltage control unit and the address electrode, and an anode end of the diode is connected to a ground unit. Plasma display device. Claim 14 was abandoned when the registration fee was paid. The method of claim 12, And a data voltage is supplied to the address electrode when the first switch unit and the field effect transistor are turned on. Claim 15 was abandoned upon payment of a registration fee. The method of claim 12, And the bias voltage is supplied to the address electrode when the first switch unit and the field effect transistor are turned off and the third switch unit is turned on. Claim 16 was abandoned upon payment of a setup registration fee. The method of claim 15, After the bias voltage is supplied to the address electrode, when the first switch unit is turned on and the third switch unit and the field effect transistor are turned off, the address electrode is configured to be turned off. And a bias voltage is floated. A plasma display panel including a plurality of address electrodes; A driving voltage supply unit for supplying driving voltages to the plurality of address electrodes; And A data drive integrated circuit configured to control the driving voltage supplied to the address electrode through a unit switch element formed in a path between the driving voltage supply unit and the plurality of address electrodes, and to block a displacement current flowing through the address electrode; Drive IC); The driving voltage supply unit includes a data voltage supply unit, a base voltage supply unit, and a bias voltage supply unit. The method of claim 17, The data drive integrated circuit (Data Drive IC) And a driving voltage controller including a plurality of unit switch elements corresponding to the plurality of address electrodes, and a plurality of displacement current blocking units having one end connected in common to the driving voltage controller and the plurality of address electrodes. Display device. In the driving method of a plasma display device including an address electrode, Controlling an output of a driving voltage including a data voltage and a ground voltage supplied to the address electrode with one switch element; And Blocking the displacement current flowing into the driving unit through the address electrode; Including, The driving voltage supplied to the address electrode further includes a bias voltage equal to or less than a discharge start voltage, and the diode blocks the displacement current flowing into the driving unit through the address electrode. delete

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