KR100719586B1 - Apparatus for driving display panel - Google Patents

Abstract

The present invention provides a driving device of a display panel for driving a display panel by applying power to electrode lines from at least one power source, the display panel comprising: a first control switch controlling a connection between the power source and the electrode line; And a band blocking filter connected to both ends of the first control switch.

Description

Apparatus for driving display panel

1 is a view showing an embodiment of the structure of a plasma display panel driven by the driving apparatus of the present invention.

FIG. 2 is a view schematically illustrating an electrode arrangement of the plasma display panel of FIG. 1.

FIG. 3 is a block diagram schematically illustrating an apparatus for driving a plasma display panel for driving the plasma display panel of FIG. 1.

4 is a timing diagram illustrating an embodiment of a drive signal output from each driver of FIG. 3.

FIG. 5 is a diagram schematically illustrating an X driver in which a band suppression filter is connected in parallel to a switching element in a driving apparatus of a plasma display panel according to an exemplary embodiment of the present invention.

FIG. 6 is a diagram schematically illustrating a Y driver in which a band suppression filter is connected in parallel to a switching element in a driving apparatus of a plasma display panel according to another exemplary embodiment of the present invention.

FIG. 7 is a graph schematically illustrating an insertion loss according to a frequency band by the band reject filter of FIGS. 5 and 6.

<Explanation of symbols for the main parts of the drawings>

12: logic controller, 14, 600: Y drive unit,

18, 500: X driver, 16: address driver,

530, 540, 630, 640: Band Stop Filter.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device of a display panel, and more particularly to a driving device of a display panel for displaying an image by repetitive discharge for a short time by using electrical energy of high voltage and high frequency.

As flat panel display devices, plasma display panels (PDPs), which are easy to manufacture large panels, have attracted attention. A plasma display panel is a display device that displays an image by using a discharge phenomenon. In general, a plasma display panel can be classified into a direct current type and an alternating current type according to the type of driving voltage. Due to the disadvantages, the development of the AC plasma display panel has been made a lot.

An AC plasma display panel includes a three-electrode AC surface discharge type plasma display panel having three electrodes and driven by an AC voltage. A typical three-electrode surface discharge type plasma display panel is composed of a multi-layered plate, which is spatially advantageous because it can provide a thinner, lighter, and wider screen than a conventional cathode ray tube (CRT).

As an example of a conventional plasma display panel, a three-electrode surface discharge plasma display panel, a driving apparatus thereof, and a driving method thereof are disclosed in US Patent No. 6,744,218 (name: Method of driving a plasma display panel in which the). width of display sustain pulse varies). Matters related to the plasma display panel, the driving apparatus, and the driving method disclosed in the above-mentioned US patent are included in the present specification, and a detailed description thereof will be omitted.

The plasma display panel includes a plurality of display cells formed in an area where the sustain electrode and the address electrode cross each other, and one display cell includes three discharge cells (red, green, and blue). The gray level of the image is expressed by adjusting the discharge state.

In order to express the gray scale of the plasma display panel, one frame applied to the plasma display panel may be configured with eight subfields having different emission counts to express 256 gray scales. That is, in the case where the image is to be displayed with 256 gray levels, the frame period (16.67 ms) corresponding to 1/60 second is divided into eight subfields. There is a reset period, an address period, and a sustain discharge period in each of the sub-fields to drive the plasma display panel.

On the other hand, as the unit light of the plasma display panel increases, the magnitude of the discharge sustain voltage for discharge increases, and the frequency increases to increase luminance. In addition, for driving the plasma display panel, a voltage of a high voltage high frequency component is applied to each of the electrode lines. And, for this purpose it is necessary to switch by the switching element.

At this time, the parasitic capacitance component exists in the switching element, and the parasitic inductance component exists on the PCB of the driving board. There is a problem that low-band EMI radiation due to the resonance frequency generated by the parasitic capacitance component and the parasitic inductance component.

An object of the present invention is to provide a driving device of a display panel which can insert a band reject filter into a switching element to remove EMI of a specific frequency band.

The present invention provides a driving device of a display panel for driving a display panel by applying power to electrode lines from at least one power source, the display panel comprising: a first control switch controlling a connection between the power source and the electrode line; And a band blocking filter connected to both ends of the first control switch.

The band reject filter is preferably formed by series connection of an inductance element and a capacitance element.

It is preferable that the said 1st control switch is a field effect transistor provided with a drain terminal, a gate terminal, and a source terminal.

Preferably, the band blocking filter has one end connected to the drain terminal and the other end connected to the source terminal.

The first control switch, the drain terminal is connected to the power source, the gate terminal is connected to the driver, the source terminal is preferably a field effect transistor connected to the electrode line.

A display panel in which a discharge cell is formed in an area where an X electrode line, a Y electrode line, and an address electrode line intersect is formed. desirable.

Preferably, the integer values of the inductance element and the capacitance element are determined such that the frequency at which the EMI radiation peak is the maximum value according to the switching of the first control switch is the resonance frequency.

According to another aspect of the present invention, a display panel driving apparatus for driving a display panel by applying power to electrode lines from at least one power source includes: a first control for controlling a connection of a first level power source and the electrode line; switch; A second control switch controlling a connection of the electrode line and a power source of a second level; And a band blocking filter connected to both ends of the first control switch and the second control switch, respectively.

According to the present invention, it is possible to remove the EMI of a specific frequency band by inserting a band reject filter in the switching element.

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

1 is a view showing an embodiment of the structure of a plasma display panel driven by the driving apparatus of the present invention. FIG. 2 is a view schematically illustrating an electrode arrangement of the plasma display panel of FIG. 1.

Referring to the drawings, in between the first substrate 100 and second substrate 106 of the PDP, A electrodes (A _1, ..., A _m), the first and second dielectric layers (102 110 ), Y electrodes (Y ₁ , ..., Y _n ), X electrodes (X ₁ , ..., X _n ), phosphor layer 112, partition wall 114, and magnesium monoxide (MgO) protective layer 104 is provided.

The A electrodes A ₁ ,..., A _m are formed in a predetermined pattern on the second substrate 106 in the direction of the first substrate 100. A second dielectric layer 110 is applied so as to cover the A electrodes _{(A 1, ..., A m} ). The partition wall 114 is formed on second dielectric layer 110 are formed in a direction parallel to the A electrodes _{(A 1, ..., A m} ). The partition walls 114 function to partition the discharge region of each discharge cell and to prevent optical interference between the discharge cells. A phosphor layer 112 is the A electrodes between the barrier ribs (114) (A _1, ..., A _m) is first applied onto the second dielectric layer 110, in sequence a red light-emitting phosphor layers, green light-emitting fluorescent substance on the Layer and a blue light emitting phosphor layer are disposed.

X electrodes _{(X 1, ..., X n} ) and Y electrodes _{(Y 1, ..., Y n} ) is orthogonal to the second substrate such that the A electrodes _{(A 1, ..., A m} ) It is formed in a predetermined pattern on the first substrate 100 in the (106) direction. Each intersection sets a corresponding discharge cell. Each of the X electrodes (X ₁ , ..., X _n ) and each of the Y electrodes (Y ₁ , ..., Y _n ) may be formed of a transparent conductive material (X _na , Y _na )) and the metal electrodes X _nb and Y _nb for increasing conductivity may be formed. The first dielectric layer 102 is formed by covering the X electrodes X ₁ ,..., X _n and the Y electrodes Y ₁ ,..., And Y _n . A protective layer 104 for protecting the panel from a strong electric field, for example, a magnesium monoxide (MgO) layer, is formed over the entire surface to cover the first dielectric layer 102. The plasma forming gas is sealed in the discharge space 108.

On the other hand, the Y electrodes (Y ₁ , ..., Y _n ) and the X electrodes (X ₁ , ..., X _n ) are arranged side by side in parallel, and the A electrodes (A ₁ , ..., A _m ) is disposed to intersect the Y electrodes Y ₁ ,..., Y _n and the X electrodes X ₁ ,..., X _n , and the intersecting area divides the discharge cell Ce. . In addition, the plasma display panel driven by the driving apparatus of the present invention is not limited to that shown in FIG.

FIG. 3 is a block diagram schematically illustrating an apparatus for driving a plasma display panel for driving the plasma display panel of FIG. 1.

Referring to the drawings, the driving apparatus of the plasma display panel includes an image processor 10, a logic controller 12, a Y driver 14, an address driver 16, an X driver 18, and a plasma display panel 1. Equipped. The image processing unit 10 converts an external image signal from the outside and outputs it as an internal image signal, and the logic controller 12 receives an internal image signal, respectively, an address driving control signal S _A and a Y driving control signal ( S _Y ) and an X driving control signal S _X are outputted. The Y driver 14, the address driver 16, and the X driver 18 receive driving control signals, respectively, and output driving signals to the Y electrodes, the A electrodes, and the X electrodes of the plasma display panel 1, respectively. .

4 is a timing diagram illustrating an embodiment of a drive signal output from each driver of FIG. 3.

Referring to FIG. 4, a unit frame for driving the plasma display panel (1 of FIG. 3) is divided into a plurality of subfields, and each subfield SF includes a reset period PR and an address period PA. And maintenance period PS.

First, in the reset period PR, a reset pulse consisting of a rising pulse and a falling pulse is applied to the Y electrodes Y ₁ , ..., Y _n , and in the X electrodes X ₁ , ..., X _n . When the falling pulse is applied, the second voltage (bias voltage) is applied to reset discharge. All discharge cells are initialized by reset discharge. The rising pulse rises from the sustain discharge voltage (Vs) by the rising voltage (V _set ) and finally reaches the rising maximum voltage (V _set + Vs), and the falling pulse falls from the sustain discharge voltage (Vs) and finally falls The voltage V _nf is reached.

In the address period PA, scanning pulses are sequentially applied to the Y electrodes Y ₁ ,..., And Y _n , and A electrodes A ₁ ,..., A _m are displayed in accordance with the scanning pulses. The data signal is applied to perform address discharge. The discharge cells to be subjected to the sustain discharge occurring in the sustain period PS by the address discharge are selected. The scan pulse has a scan high voltage (Vsch) and sequentially has a scan low voltage (Vscl) whose voltage is lower than the scan high voltage (Vsch), and the display data signal is adapted to the scan low voltage (Vscl) of the scan pulse. It has a positive address voltage Va.

In the sustain period PS, a sustain pulse is alternately applied to the X electrodes X ₁ ,..., X _n and the Y electrodes Y ₁ ,..., Y _n to perform a sustain discharge. Luminance is expressed according to the gray scale weight allocated to each subfield by the sustain discharge. The sustain pulse has an alternating discharge voltage Vs and a ground voltage Vg.

On the other hand, it is possible to output a drive signal different from that shown in FIG. 4 in each of the driving units of FIG.

FIG. 5 is a diagram schematically illustrating an X driver in which a band suppression filter is connected in parallel to a switching element in a driving apparatus of a plasma display panel according to an exemplary embodiment of the present invention. FIG. 7 is a graph schematically illustrating an insertion loss according to a frequency band by the band reject filter of FIG. 5.

Referring to the drawings, the driving apparatus of the plasma display panel according to the present invention includes a first voltage applying unit 511 for outputting a first voltage Vs in order to output a driving signal to the X electrodes (the first end of Cp). And a sustain pulse applying unit 510 including a ground voltage applying unit 512 for outputting a ground voltage Vg, a second voltage applying unit 505 for outputting a second voltage Vb, and a charge in the panel. And an energy recovery unit 520 for accumulating or storing charge in the panel, and a switching unit 507.

The first voltage applying unit 511 includes a first switching element S1 having one end connected to the first voltage source Vs and the other end connected to the switching unit 507. The ground voltage applying unit 512 includes a second switching element S2 having one end connected to the ground and the other end connected to the switching unit 507. The sustain pulse applying unit 510 including the first voltage applying unit 511 and the ground voltage applying unit 512 alternates between the first switching element S1 and the second switching element S2 to generate a sustain pulse. Turn on and off.

The first switching element S1 and the second switching element S2 each include a field effect transistor (FET) having a drain terminal, a gate terminal, and a source terminal. Can be. In this case, the drain terminal may be connected to the power supply Vs, the gate terminal may be connected to the driving unit (not shown), and the source terminal may be connected to the X electrode line Xi.

Band rejection filters 530 and 540 are connected to both ends of the first switching element S1 and the second switching element S2, respectively. In this case, the band blocking filters 530 and 540 may be formed by series connection of the inductance elements L11 and L12 and the capacitance elements C11 and C12.

A frequency analysis generated due to the unique characteristics of each of the first switching element S1 and the second switching element S2 is performed, and a frequency region having a large amount of electro-magnetic interference (EMI) is found. In addition, the device values of the inductance elements L11 and L12 and the capacitance elements C11 and C12 of the band rejection filters 530 and 540 may be determined so as to remove EMI in the corresponding frequency domain. That is, the element values of the inductance elements L11 and L12 and the capacitance elements C11 and C12 are set such that the resonance frequencies of the band suppression filters 530 and 540 correspond to the portions where the insertion loss is minimized in FIG. 7. It is preferred to be determined.

That is, the EMI of the frequency region where the EMI radiation due to the high frequency switching of the switching elements S1 and S2 is most severe is filtered by the band blocking filters 530 and 540. Therefore, EMI radiation due to high frequency switching of the switching elements S1 and S2 can be effectively reduced.

The third switching element S3 has one end connected to the second voltage source Vb and the other end connected to the X electrodes (first end of Cp) and the switching unit 507 of the panel. ). The third switching device S3 is turned on and the second voltage Vb is output to the X electrodes C1 of the panel.

The energy recovery unit 520 accumulates in the panel Cp an energy storage unit 521 for storing charges in the panel Cp, and charges connected to the energy storage unit 521 and stored in the energy storage unit 521. An energy recovery switching unit 522 for controlling the storage of the charge in the panel Cp in the energy storage unit 521, one end of which is connected to the energy recovery switching unit 522 and the other end of the X electrodes Cp of the panel; An inductor L1 connected to the first stage).

The energy storage unit 521 may include a capacitor C2 to store charge in the panel. The energy recovery switching unit 522 includes a fourth switching device S4 and a fifth switching device S5 having one end connected to the energy storage unit 521 and the other end connected to the inductor L1. Two first and second diodes D1 and D2 having different directions may be connected between the device S4 and the fifth switching device S5.

Band reject filters (530, 540) connected to both ends of the first switching element (S1) and the second switching element (S2) are both ends of the fourth switching element (S4) and the fifth switching element (S5). Can also be connected. At this time, the element values of the inductance element and the capacitance element of the band rejection filter may be determined to remove the EMI of the corresponding frequency range.

EMI in the frequency domain where the EMI radiation due to the high frequency switching of the switching elements S4 and S5 is severe is filtered by the band blocking filters 530 and 540. Therefore, EMI radiation due to high frequency switching of the switching elements S4 and S5 can be effectively reduced.

Referring to the operation of the energy recovery unit 520, when the fifth switching device (S5) of the energy recovery switching unit 522 is turned on, the charge in the panel is inductor (L1), the second diode (D2), 5 is stored in the second capacitor C2 via the switching element S5. When the fourth switching device S4 of the energy recovery switching unit 522 is turned on, the charge stored in the second capacitor C2 is transferred to the fourth switching device S4, the first diode D1, and the inductor L2. Is accumulated in the panel Cp through

One end of the switching unit 507 is connected to the sustain pulse applying unit 510, and the other end thereof is connected between the second voltage applying unit 505 and the X electrodes (first end of Cp) of the panel and ground. 6 switching elements S6 are provided. The switching unit 507 performs a switching operation to apply the sustain pulse output from the sustain pulse applying unit 510 to the X electrodes of the panel, and the second voltage Vb output from the second voltage applying unit 505. ) Does not flow to the sustain pulse applying unit 510. That is, the sixth switching element S6 is turned on to apply the sustain pulse to the X electrodes (first end of the Cp) of the panel, and the second voltage Vb does not flow to the sustain pulse applying unit 510. To be turned off.

FIG. 6 is a diagram schematically illustrating a Y driver in which a band suppression filter is connected in parallel to a switching element in a driving apparatus of a plasma display panel according to another exemplary embodiment of the present invention. FIG. 7 is a graph schematically illustrating an insertion loss according to a frequency band by the band reject filter of FIG. 6.

Referring to the drawings, the driving apparatus of the plasma display panel according to the present invention outputs the first voltage Vs to the first node N1 in order to output the driving signal to the Y electrodes (the second end of the Cp). A sustain pulse applying unit 610 including a first voltage applying unit 611 and a ground voltage applying unit 612 for outputting a ground voltage Vg to the first node N1, and one end of the first node N1. ) Is connected to the second end and the other end is connected to the second node (N2) including a first switching unit 605 including a seventh switching element (S17), one end is connected to the second node (N2) and the other end is a third node A second switching unit 617 including a fifteenth switching element S15 connected to N3 and a first voltage Vs is connected between the first node N1 and the second node N2. The third voltage applying unit 607 gradually increases by 3 voltages Vset and outputs the result to the second node N2, and is connected to the third node N3 and the first voltage Vs is applied to the fourth voltage Vnf. The fourth node which is gradually lowered to and outputs to the third node N3 And a voltage applying unit 609 and a first scan switching element SC1 and a second scan switching element SC2 connected in series with each other, and include a first scan switching element SC1 and a second scan switching element SC2. The fourth node N4, which is between and includes a scan switching unit 601 connected to the Y electrodes (the second end of Cp) of the panel, and the fifth voltage source Vsch, the first scan switching element SC1. A fifth voltage applying unit 603 connected to the first scan switching element SC1 and outputting a fifth voltage Vsch, and connected to a third node N3 and the second scan switching element SC2. And a sixth voltage applying unit 615 for outputting a sixth voltage Vscl, and an energy recovery unit 620 for accumulating charge in the panel Cp or storing charge in the panel Cp.

The first voltage applying unit 611 includes an eighth switching element S8 having one end connected to the first voltage source Vs and the other end connected to the first node N1. The ground voltage applying unit 612 includes a ninth switching element S9 having one end connected to the ground and the other end connected to the first node N1. In the sustain pulse applying unit 610 including the first voltage applying unit 611 and the ground voltage applying unit 612, the eighth switching element S8 and the ninth switching element S9 alternate with each other to generate a sustain pulse. Is turned on.

The eighth switching element S8 and the ninth switching element S9 each include a field effect transistor (FET) including a drain terminal, a gate terminal, and a source terminal. Can be. In this case, the drain terminal may be connected to the power source Vs, the gate terminal may be connected to the driving unit (not shown), and the source terminal may be connected to the Y electrode line Yi.

Band rejection filters 630 and 640 are connected to both ends of the eighth switching element S8 and the ninth switching element S9, respectively. In this case, the band blocking filters 630 and 640 may be formed by series connection of the inductance elements L21 and L22 and the capacitance elements C21 and C22.

Frequency analysis generated due to the inherent characteristics of each of the eighth switching element S8 and the ninth switching element S9 is performed, and a frequency region having a large amount of electro-magnetic interference (EMI) is found. In addition, the device values of the inductance elements L21 and L22 and the capacitance elements C21 and C22 of the band rejection filters 630 and 640 may be determined to remove the EMI of the corresponding frequency range. That is, the element values of the inductance elements L21 and L22 and the capacitance elements C21 and C22 are set such that the resonance frequencies of the band blocking filters 630 and 640 correspond to the portions where the insertion loss is minimized in FIG. 7. It is preferred to be determined.

That is, the EMI of the frequency region with the highest EMI emission due to the high frequency switching of the switching elements S8 and S9 is filtered by the band blocking filters 630 and 640. Therefore, EMI radiation due to the high frequency switching of the switching elements S8 and S9 can be effectively reduced.

The third voltage applying unit 607 has one end connected to the first node N1 and the other end connected to the third voltage source Vset, the third voltage source Vset and the second node ( A tenth switching element S10 connected between N3) is provided. The seventh switching device S7 of the first switching unit 605 is turned off, the fifteenth switching device of the second switching unit 617 is turned on, and the eighth switching device of the first voltage applying unit 611. S8 and the tenth switching element S10 of the third voltage applying unit 607 are turned on and gradually rise from the first voltage Vs by the third voltage Vset to finally increase the maximum voltage Vset + Vs. ) Is output to the third node N3.

The fourth voltage applying unit 609 includes an eleventh switching element S11 having one end connected to the third node N3 and the other end connected to the fourth voltage source Vnf. The eighth switching element S8 of the first voltage applying unit 611, the seventh switching element S7 of the first switching unit 605, the fifteenth switching element S15 of the second switching unit 617, and the fifth The eleventh switching element S11 of the four voltage applying unit 609 is turned on and a voltage gradually lowered from the first voltage Vs to the fourth voltage Vnf is output to the third node N3.

The sixth voltage applying unit 615 includes a twelfth switching element S12 connected between the third node N3 and the sixth voltage source Vscl. The twelfth switching element S12 is turned on and outputs a sixth voltage Vscl to the third node N2.

When the first scan switching device SC1 of the scan switching unit 601 is turned on and the second scan switching device SC2 is turned off, the fifth voltage Vsch passes through the fourth node N4 to Y electrodes. It is output to (the second stage of Cp). On the other hand, when the first scan switching device SC1 of the scan switching unit 601 is turned off and the second scan switching device SC2 is turned on, each voltage output to the third node N3, that is, the first voltage is turned on. (Vs), ground voltage (Vg), rising maximum voltage (Vs + Vset), fourth voltage (Vnf), and sixth voltage (Vscl) pass through the fourth node (N4) to the second electrodes of the Y electrodes (Cp). )

The energy recovery unit 620 stores the charge in the panel Cp and the energy storage unit 621 and the charges connected to the energy storage unit 621 and stored in the energy storage unit 621 in the panel Cp or An energy recovery switching unit 622 for controlling the storage of the charge in the panel Cp in the energy storage unit 621, and one end thereof is connected to the energy recovery switching unit 622, and the other end thereof is connected to the first node N1. Inductor L2 is provided.

The energy storage unit 621 may include a capacitor C5 to store the charge in the panel. The energy recovery switching unit 622 includes a thirteenth switching element S13 and a fourteenth switching element S14 having one end connected to the energy storage unit 621 and the other end connected to the inductor L2. Two third and fourth diodes D3 and D4 having different directions may be connected between the element S13 and the fourteenth switching element S14.

Band rejection filters 630 and 640 connected to both ends of the eighth switching element S8 and the ninth switching element S9 have both ends of the thirteenth switching element S13 and the fourteenth switching element S14. Can also be connected. At this time, the element values of the inductance element and the capacitance element of the band rejection filter may be determined to remove the EMI of the corresponding frequency range.

EMI of the frequency region where the EMI radiation due to the high frequency switching of the switching elements S13 and S14 is severe is filtered by the band blocking filters 630 and 640. Therefore, EMI radiation due to high frequency switching of the switching elements S13 and S14 can be effectively reduced.

The band stop filter according to the present invention may be connected to other switching elements in addition to the above switching elements. In addition, the band blocking filter may be connected to switching elements for applying a voltage to any one of the X electrode line, the Y electrode line, and the address electrode line.

According to the driving apparatus of the display panel according to the present invention, by inserting a band stop filter in the switching element, it is possible to remove the EMI of a specific frequency band.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, it is merely an example, and those skilled in the art may realize various modifications and equivalent other embodiments therefrom. I can understand. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

Claims (14)

In the driving device of the display panel for driving the display panel by applying power to the electrode lines from at least one power source, A first control switch controlling a connection of the power supply and the electrode line; And A band jersey filter connected to both ends of the first control switch, And an inductance element and a capacitance element to which the band blocking filter is connected in series. delete The method of claim 1, And the first control switch is a field effect transistor including a drain terminal, a gate terminal, and a source terminal. The method of claim 3, And the band blocking filter, one end of which is connected to the drain terminal, and the other end of which is connected to the source terminal. The method of claim 1, And a first effect switch, a drain terminal is connected to the power source, a gate terminal is connected to a driver, and a source terminal is a field effect transistor connected to the electrode line. The method of claim 1, By driving a display panel in which discharge cells are formed in an area where an X electrode line, a Y electrode line, and an address electrode line cross each other. And the electrode line is at least one of an X electrode line, a Y electrode line, and an address electrode line. The method according to any one of claims 3 to 6, And an integer value of the inductance element and the capacitance element is determined such that a frequency at which the EMI radiation peak is the maximum value is a resonance frequency according to switching of the first control switch. In the driving device of the display panel for driving the display panel by applying power to the electrode lines from at least one power source, A first control switch controlling a connection between a power supply of a first level and the electrode line; A second control switch controlling a connection of the electrode line and a power source of a second level; And Band blocking filters connected to both ends of the first control switch and the second control switch, respectively; And an inductance element and a capacitance element to which the band blocking filter is connected in series. delete The method of claim 8, And the first and second control switches are field effect transistors each having a drain terminal, a gate terminal, and a source terminal. The method of claim 10, And the band blocking filters, one end of which is connected to the drain terminal and the other end of which is connected to the source terminal. The method of claim 8, And the first and second control switches, a drain terminal is connected to the power source, a gate terminal is connected to a driving unit, and a source terminal is a field effect transistor connected to the electrode line. The method of claim 8, By driving a display panel in which discharge cells are formed in an area where an X electrode line, a Y electrode line, and an address electrode line cross each other. And the electrode line is at least one of an X electrode line, a Y electrode line, and an address electrode line. The method according to any one of claims 10 to 13, And the constant values of the inductance element and the capacitance element are determined such that a frequency at which the EMI radiation peak is the highest value is a resonance frequency according to switching of the first control switch and the second control switch.

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