KR100811478B1 - Plasma Display Apparatus - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device for adjusting a supply point of a data pulse supplied from a data driver to an address electrode (X). The present invention relates to a data pulse by adjusting an application point of a data pulse according to each address electrode group of the data driver. By reducing the amount of noise generated to prevent electrical damage to the data drive integrated circuit and stabilizing the address discharge, the driving of the plasma display panel can be stabilized and the deterioration of driving stability can be suppressed.

Accordingly, the plasma display apparatus of the present invention includes a plasma display panel including a plurality of address electrodes, a data supply unit supplying image data supplied from the outside to the address electrodes through a switching operation, and at least one address electrode. The plurality of address electrode groups may include a data delay unit configured to delay a timing control signal to supply the image data at at least one different time point and to supply the image data to the data supply unit.

Description

Plasma Display Apparatus {Plasma Display Apparatus}

1 is a view for explaining the function of a data driver of a conventional plasma display device.

2 is a diagram illustrating a phenomenon in which noise occurs in a data pulse applied by a data driver of a conventional plasma display apparatus.

3 is a diagram showing the structure of a plasma display device according to the present invention;

4 is a view for explaining an example of the structure of a plasma display panel according to the present invention;

FIG. 5 is a diagram for describing a method of classifying a plurality of address electrodes of a plasma display panel into an address electrode group including one or more address electrodes. FIG.

FIG. 6 is a diagram for explaining an example of dividing into an address electrode group including a different number of address electrodes in a data supply unit of a plasma display device; FIG.

7 is a view for explaining in detail the structure of the data delay unit and the data supply unit of the plasma display device of the present invention.

FIG. 8 is a view for explaining an effect shown by adjusting a supply time point of a data pulse for each address electrode group of a data driver in a plasma display device of the present invention; FIG.

FIG. 9 is a view for explaining an example of a method of applying a strobe signal delayed in each data delay unit to a data supply unit in order to change a time point of application of a data pulse to a plurality of data drivers according to the present invention.

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

710: data driver 720: data delay unit

730: data supply unit 721: first delay unit

701,702,703,704: A, B, C, D address electrode group

724: second delay unit

The present invention relates to a plasma display device, and more particularly, to a plasma display device for controlling a time point of supplying a data pulse supplied from an data driver to an address electrode (X).

Recently, the importance of the display panel as a visual information transmission medium in the information society has been further emphasized, and in order to gain a major position in the future, it is necessary to satisfy requirements such as low power consumption, light weight, and high quality.

The display panel includes a cathode ray tube (CRT), an electroluminescence (EL), a light emitting diode (LED), a vacuum fluorescence display (VFD), a field emission display (Field Emission). Display (FED), Plasma Display Panel (PDP), Liquid Crystal Display (LCD) and the like.

Among these display panels, the plasma display panel can be enlarged, thin, light, and have high image quality. The plasma display apparatus is formed by including the plasma display panel and a driver for applying driving pulses to the electrodes of the plasma display panel.

Here, the function of the data driver for applying the data pulse to the address electrode of the plasma display panel will be briefly described with reference to FIG. 1.

1 is a view for explaining the function of the data driver of the conventional plasma display device.

As shown in FIG. 1, the data driver 110 of the conventional plasma display apparatus includes a data supply unit.

The data supply unit 130 is electrically connected to the plurality of address electrodes and supplies data pulses to the plurality of address electrodes through a predetermined switching operation in response to image data supplied from the outside. In this case, the data supply unit 130 supplies image data in accordance with a strobe control signal applied by a controller (not shown) to supply data to the plurality of address electrodes 1 to n. n).

 Here, the data driver 110 of the conventional plasma display apparatus has a data pulse supplied through the data supply unit 130 according to one strobe control signal, and addresses all of the address electrodes, that is, address 1 to n times. When image data is simultaneously supplied to the electrodes, noise is generated for each data pulse applied. Accordingly, the phenomenon in which noise occurs in each data pulse is shown in FIG. 2.

2 is a diagram illustrating a phenomenon in which noise occurs in a data pulse applied by a data driver of a conventional plasma display apparatus.

As shown in FIG. 2, when the application time of the data pulses supplied to the plurality of address electrodes 1 to n is the same, the data driver of the conventional plasma display apparatus generates noise in the data pulses. Such noise is generated due to coupling through capacitance of the plasma display panel, and rising noise is generated when the data pulse is rapidly rising, and falling noise is generated when the data pulse is rapidly falling. There is a problem.

In addition, when the data pulses supplied to the plurality of address electrodes 1 to n have the same application time, the voltage increases rapidly because switching operations occur simultaneously in the data drive IC included in the data driver. As a result, an increase in ripple current may cause electrical damage to the data drive integrated circuit included in the data driver 110 illustrated in FIG. 1. Furthermore, stable driving of the plasma display panel is inhibited.

In order to solve the above problems, the present invention provides a plasma display device that reduces the amount of noise generated in the data pulse and prevents the voltage from rising by adjusting the supply time of the data pulse supplied from the data driver to the plurality of address electrodes. The purpose is to provide.

A plasma display device of the present invention for achieving the above object is a plasma display panel having a plurality of address electrodes and a data supply unit for supplying image data supplied from the outside to the address electrode through a switching operation and at least one of the above The plurality of address electrode groups including an address electrode may include a data delay unit configured to delay a timing control signal to supply the image data at at least one different time point and to supply the image data to the data supply unit.

The data delay unit includes a first delay unit and a second delay unit, the first delay unit is a buffer, and the second delay unit is a resistor.

The data delay unit may supply three or more timing control signals having different data supply points from the first delay unit and the second delay unit to the data supply unit.

In addition, the data delay unit is characterized in that for supplying a timing control signal to the data supply unit so that the difference between the supply time point is 5ns (nanosecond) or more and 10ns (nanosecond) or less.

Each of the plurality of address electrode groups has the same number of address electrodes.

The number of address electrodes included in any one of the plurality of address electrode groups may be different from the number of address electrodes included in the remaining address electrode groups.

Hereinafter, a plasma display device of the present invention will be described in detail with reference to the accompanying drawings.

3 is a view showing the structure of a plasma display device according to the present invention.

As shown in FIG. 3, the plasma display apparatus according to the present invention includes a data driver 310 including a plasma display panel 300 and a data supply unit 330, a control unit 340 for applying a control signal, and delayed timing control. It includes a data delay unit 320 for applying a signal.

Here, the structure of the plasma display panel 300 which is one of the components of the plasma display apparatus of the present invention will be described.

4 is a view for explaining an example of the structure of a plasma display panel according to the present invention.

Referring to FIG. 4, the plasma display panel includes a front panel 40 having a plurality of sustain electrodes formed by pairing a scan electrode 401 and a sustain electrode 402 on a front substrate 400, which is a display surface on which an image is displayed. And a rear panel 41 on which a plurality of data electrodes 412 are arranged so as to intersect with the plurality of storage electrodes described above on the rear substrate 410 forming the rear surface.

The front panel 40 includes a scan electrode 401 and a sustain electrode 402 for maintaining the discharge and light emission of a cell, that is, a transparent electrode (a) formed of a transparent ITO material and a bus electrode (b) made of a metal material. The scan electrode 401 and the sustain electrode 402 provided as a pair are arranged in pairs. The scan electrode 401 and the sustain electrode 402 are covered by an upper dielectric layer 403 that limits the discharge current and insulates the electrode pairs, and is generally disposed on the upper dielectric layer 403 to facilitate discharge conditions. A protective layer 404 on which magnesium oxide (MgO) is deposited is formed.

The rear panel 41 is arranged with a plurality of discharge spaces, that is, barrier ribs 411 of stripe type (or well type) for forming discharge cells. In addition, a plurality of data electrodes 412 causing address discharge are arranged in parallel with the partition wall 411. At this time, between the barrier rib 411 and the two barrier ribs 411, R, G, and B phosphor layers 413 for emitting visible light for image display are formed to have a predetermined thickness. A lower dielectric 414 is formed between the data electrode 412 and the phosphor layer 413 to protect the data electrode 412 and reflect visible light emitted from the phosphor layer 413 toward the front panel 40.

In FIG. 4, only an example of a plasma display panel to which the present invention can be applied is illustrated and described, and the present invention is not limited to the structure of FIG. 4. For example, in FIG. 4, only the scan electrode 401 and the sustain electrode 402 described above are made of the transparent electrode a and the bus electrode b, respectively. However, the scan electrode 401 and the sustain are different from each other. At least one of the electrodes 402 may be composed of only the bus electrode b.

4 illustrates only an example in which the scan electrode 401 and the sustain electrode 402 and the data electrode 412 are formed on the rear substrate 41 in the front panel 40, but the data electrode ( 412 may be formed, or the scan electrode 401 and the sustain electrode 402 of the front panel 40 may be formed on the rear panel 41.

In FIG. 4, two electrodes of the scan electrode 401 and the sustain electrode 402 are disposed for each discharge cell of the front panel 40, but the trigger electrode is disposed between the two electrodes 401. This can be arranged. Here, the trigger electrode serves to reinforce the sustain discharge by generating priming electrons by first discharging the scan electrode 401 or the sustain electrode 402 by a sustain pulse applied when the plasma display panel 400 is driven. can do. Two or more such trigger electrodes may be provided.

4, the plasma display panel 300 which can be applied to the plasma display apparatus of the present invention is formed with a plurality of address electrodes X, and other conditions may be used.

Referring to FIG. 3 again, the control unit 340 of the plasma display apparatus includes the data driver 310 and timing control signals CTRX, CTRY, and the like for controlling the operation timing and synchronization of a scan driver and a sustain driver not shown. Each driving unit is controlled by generating CTRZ and supplying the timing control signals CTRX, CTRY, and CTRZ to the corresponding driving units.

At this time, the data control signal CTRX includes a sampling clock for sampling data, a latch control signal, and a strobe signal, which is a timing control signal for adjusting data supply. Of these data control signals, a strobe signal, which is a timing control signal required for the present invention, is applied to the data delay unit 320.

When the data delay unit 320 receives the strobe signal by the control unit 340, the data delay unit 320 supplies the external image data to the plurality of address electrodes 1 to n of the plasma display panel 300. At 310, a data pulse is applied. In this case, the data delay unit 320 may include a strobe signal, which is a timing control signal that is delayed to supply image data at at least one different time point, of the plurality of address electrode groups including one or more address electrodes, to the data supply unit of the data driver 310. 330 is applied. The data delay unit 320 preferably includes a buffer and a resistor to generate a delayed timing control signal.

The data driver 310 includes a data supplier 330 to supply data pulses to the plurality of address electrodes 1 to n.

The data supply unit 330 is electrically connected to the plurality of address electrodes 1 to n to latch the image data supplied from the outside to switch the plurality of addresses of the plasma display panel 300 through a switching operation. It supplies to the electrodes 1-n. In this case, the data supply unit 330 supplies the image data supplied from the outside to the plurality of address electrodes 1 to n according to the strobe signal, which is a delayed timing control signal of the data delay unit 320.

In this case, when the data supply unit 330 applies a data pulse to the plurality of address electrodes 1 to n, the data supply unit 330 is divided into a plurality of address electrode groups including one or more address electrodes, and the plurality of address electrode groups are different from each other. Image data is supplied by applying data pulses.

The data supply unit 330 may divide the plurality of address electrodes into a plurality of address electrode groups logically or physically. That is, the data supply unit 330 may virtually divide the plurality of address electrodes 1 to n into one or more address electrode groups or physically divide the plurality of address electrodes into one or more address electrode groups.

Here, a method of dividing the plurality of address electrodes 1 to n included in the plasma display panel into a plurality of address electrode groups including one or more address electrodes will be described with reference to FIGS. 5 to 6.

FIG. 5 is a diagram for describing a method of classifying a plurality of address electrodes of a plasma display panel into an address electrode group including one or more address electrodes.

Referring to FIG. 5, a plurality of address electrodes of a plasma display panel are divided into an A address electrode group, a B address electrode group, a C address electrode group, and a D address electrode group.

For example, when a total of 200 address electrodes are divided into a plurality of address electrode groups on one data supply unit 330, the address electrode 50 is divided into an A address electrode group 501 from the first address electrode, and 51 Address electrodes 100 to 100 are divided into B address electrode groups 502. In this manner, address electrodes 101 to 150 are classified into C address electrode groups 503 and address 151 to 200. Assume that the electrode is divided by the D address electrode group 504. As such, it is preferable that each of the plurality of address electrode groups have the same number of address electrodes.

In FIG. 5, although the number of address electrodes included in each address electrode group 501, 502, 503, 504 is the same, at least one address electrode among the address electrode groups 501, 502, 503, 504 described above is the same. It is also possible to set the number of address electrodes included in the group differently from other address electrode groups. The number of address electrodes is also adjustable. Looking at it as shown in FIG.

FIG. 6 is a diagram for explaining an example of dividing into an address electrode group including a different number of address electrodes in a data supply unit of a plasma display device.

Referring to FIG. 6, in the data supply unit 310 of the plasma display apparatus, a plurality of address electrodes may be defined as an A address electrode group 601, a B address electrode group 602, a C address electrode group 603, and a D address electrode group 604. ) And E address electrode group 605. Here, one or more of the five address electrode groups 601, 602, 603, 604, and 605 are divided into a different number of address electrodes than the other address electrode groups.

For example, when a total of 200 address electrodes are divided into one or more address electrode groups on one data supply unit 310 of the plasma display apparatus, a total of 20 address electrodes from the address electrode 1 to the address electrode 20 are addressed A. The electrode group 601 is divided into a total of 40 address electrodes from the address electrode 21 to the address address 60 to the B address electrode group 602, and the address address electrode 61 to the C address electrode group 603. A total of 89 address electrodes from the address electrode 62 to the address electrode 150 are classified into the D address electrode group 604. A total of 50 address electrodes from the address electrode 151 to the address electrode 200 are assigned to the E address. It can be divided into the electrode group 605.

5 to 6, the data supply unit 330 of the plasma display apparatus according to the present invention includes a plurality of address electrodes in a state in which the plurality of address electrodes 1 to 200 are divided into a plurality of address electrode groups. The address electrode groups of are supplied with data pulses at different time points to supply image data to the plurality of address electrodes of the plasma display panel.

This data supply method is controlled by a strobe signal, which is a plurality of delayed timing control signals of the data delay unit 320 described with reference to FIG. 3. Therefore, an example of supplying image data to a plurality of address electrode groups by varying the application time point of the data pulse according to the timing control signal will be described with reference to FIGS. 7 and 8.

7 is a view for explaining the operation of the data delay unit for adjusting the supply time of the data pulse in accordance with the address electrode group of the data supply unit.

Referring to FIG. 7, the plasma display apparatus according to the present invention includes a data driver 710 and a data delay unit 720.

The data supply unit 730 included in the data driver 710 latches external image data and supplies the external image data to the address electrode X of the plasma display panel (not shown). In this case, the data supply unit 730 has a logic or physical structure in which the plurality of address electrodes 1 to n are distributed to one or more address electrode groups in order to supply data to the plurality of address electrodes of the plasma display panel. That is, the data supply unit 730 of the present invention has a structure corresponding to a case where the address electrode groups are divided into four address electrode groups A, B, C, and D in one data supply unit 730. Data supply unit 730 is not limited to the structure shown in FIG.

Meanwhile, according to the plurality of address electrode groups A, B, C, and D, which are physically or logically divided by the data supply unit 730, the data delay unit 720 includes a plurality of address electrode groups A including one or more address electrodes. The strobe signals strobe t1, t2, delayed so that the supply timing of the data pulses supplied to the address electrodes X of the plasma display panel from one or more of the address electrode groups B, C, and D is different from the other address electrode groups; t3 and t4 are applied to the data supply unit 730.

At this time, the data delay unit 720 generates a strobe signal strobe t1, t2, t3, t4 delayed so that the supply point of the data pulse is different from the other address electrode groups. Part 724 is included. In this case, it is preferable that the first delay unit 721 is a buffer and the second delay unit 724 is a resistor. The data delay unit 720 including the first delay unit 721 and the second delay unit 724 may supply a data pulse generated by the first delay unit 721 and the second delay unit 724. The strobe signals t1, t2, t3, t4, which are three or more different timing control signals, are applied to the data supply unit 730.

For example, when the plurality of address electrodes 1 to n of one data supply unit are divided into four address electrode groups A, B, C, and D, each address electrode group corresponds to a different time point. Four strobe (Strobe, t1, t2, t3, t4) signals are applied to the data supply unit 730 to supply the data pulse to the address electrode X of the plasma display panel. At this time, each delayed strobe signal has a difference between the supply points of 5 ns (nano seconds) or more than 10 ns (nano seconds) according to data pulses corresponding to different time points of the respective address electrode groups A, B, C, and D. A strobe signal is applied to the data supply section to be described below.

In more detail, the data delay unit 720 receives a strobe control signal from a controller (not shown) by the first delay unit 721 and the second delay unit 724. The data pulse supplied to the A address electrode group 701 of 730 applies a strobe signal to the data supply unit 730 to be supplied at time t1. At this time, the data supply unit 730 latches the image data supplied from the outside and supplies the data data at the time t1 of the data pulse supplied to the A address electrode group 701.

In addition, the data delay unit 720 transmits a predetermined delayed strobe signal strobe t2 to the data supply unit 730 such that a data pulse supplied to the B address electrode group 702 of the data supply unit 730 is supplied at a time t2. Is authorized.

Similarly, the data delay unit 720 is supplied at the time t3 of the data pulse supplied to the C address electrode group 703 and the strobe signal delayed to be supplied at the time t4 of the data pulse supplied to the D address electrode group 704. Strobe Signal,) is applied to the data supply unit 730. Thus, the strobe signals strobe t1, t2, t3, t4 having the data pulse supply points t1, t2, t3, and t4 are generated by the first delay unit 721 and the second delay unit 724. It is caused by a delay by a predetermined time due to the structural design.

Accordingly, the plasma display apparatus of the present invention makes a supply point of a data pulse supplied to one or more address electrode groups among the plurality of address electrode groups A, B, C, and D different from other address electrode groups by the above-described method.

Here, the data delay unit 720 has a difference between the supply time points of the data pulses of 5 ns (nanoseconds) or more when the supply points of the data pulses are changed according to the respective address electrode groups A, B, C, and D. It is preferable to apply a strobe signal to the data supply unit 730 to be less than nanoseconds).

For example, when the data delay unit 720 has a difference of 10 ns (nanoseconds) between the time points at which the data pulses are supplied, the data delay unit 720 may be arranged in the A address electrode group among the plurality of address electrode groups of the data supply unit 730. The strobe signal strobe t1 of 0 ns (nanoseconds) is supplied, the strobe signal strobe t2 of 10 ns (nanoseconds) is supplied to the B address electrode group, and the strobe signal strobe of 20 ns (nanoseconds) to the C address electrode group. t3) is supplied, and a delayed strobe signal strobe t4 of 30 ns (nanoseconds) is applied to the data supply unit 730 to the D address electrode group.

As described above, the data delay unit 720 is more effective because the difference between the time points of the data pulses is supplied to supply external image data to the address electrode X of the plasma display panel more quickly. Considering the design structure of 720, the data delay unit 720 has a difference between the supply points of 5 ns (nanoseconds). In addition, the data delay unit 720 may at least set the difference between the supply time points of the data pulses at least 10 ns (nanoseconds).

In this case, the data delay unit 720 may at least 10 ns (nanoseconds) apart from each other when supplying data pulses, thereby controlling the amount of data supplied from the data driver and quickly sending the data to the plasma display panel, and the data driver 710. Since the switching operation does not occur simultaneously in the data drive integrated circuit (Data Drive IC, not shown) included in the to prevent the voltage surge. Therefore, by preventing a surge in voltage to reduce the ripple current (Ripple Current) to prevent electrical damage of the data drive integrated circuit (Data Drive IC, not shown) included in the data driver 710. In addition, the data delay unit 720 applies the delayed strobe signal to the data supply unit 730 to reduce the amount of noise generated in the data pulse by varying the time point of supplying the data pulse.

As described above, the effect of adjusting the time point of supplying the data pulse will be apparent through FIG. 8 as follows.

FIG. 8 is a view for explaining an effect of adjusting a supply time point of a data pulse for each address electrode group of a data driver in the plasma display apparatus of the present invention.

Referring to FIG. 8, the noise generated in the data pulses is significantly reduced compared to the conventional FIG. 2 by varying the supply points of the data pulses of the A address electrode group, the B address electrode group, the C address electrode group, and the D address electrode group. It became. The reason why such noise is reduced is that all the address electrode groups of the data driver do not supply data pulses at the same time point, and the data is transmitted to the address electrodes X of the plasma display panel at a time different from the one or more address electrode groups and the other address electrode groups. By supplying pulses to reduce the coupling through the capacitance of the plasma display panel at each supply point, the rising noise is reduced at the time when the data pulse rises and falls at the time when the data pulse falls. This is because it reduces noise.

In the above, a constant delayed strobe signal is applied to the data driver of the data driver to change the application time point of the data pulse through an example of one data driver. However, even when a plurality of data drivers are formed, the strobe signal that is delayed to each data driver is output. It can be applied to the supply part. An example of this is described in FIG. 9.

FIG. 9 is a view for explaining an example of a method of applying a strobe signal delayed in each data delay unit to a plurality of data supply units so as to change the application timing of data pulses to the plurality of data drivers according to the present invention.

9, the plasma display apparatus includes a plurality of data drivers 711, 712, 713, and 714 and a plurality of data delay units 721, 722, and 723. 9 illustrates an example having three data drivers and three data delay units.

Each data driver 711, 712, 713, 714 includes data supplies 731, 732, 733, 734, which are divided into four address electrode groups A, B, C, and D, respectively. Lose. In addition, although not shown, the data delay units 721, 722, and 723 receive a strobe signal, which is a timing control signal, from the control unit, and output the strobe signals strobe t1, t2, t3, and t4 according to the respective data delay units. Apply to the data supply.

In more detail, the strobe signal strobe t1 for the non-delayed t1 time is applied to the A address electrode group of the first data supply unit 731, and the first data delay unit 721 for the strobe signal for t1 time. The delayed strobe signal strobe t2 by t2 time is further applied to the A address electrode group of the second data supply unit 732, and the second data delay unit 722 further delays the delayed strobe signal by t2. T3 time delayed strobe signal (strobe t3) is applied to the A address electrode group of the third data supply unit 733, the third data delay unit 723 further delays the delayed strobe signal by t3 time t4 time As much as the strobe signal strobe t4 is applied to the A address electrode group of the fourth data supply unit 734.

In addition, as described above, the remaining B address electrode groups, C address electrode groups, and D address electrode groups except for the A address electrode group are transferred to the respective data supply units. Is authorized. At this time, the delayed strobe signal generated by each data delay unit applies the delayed strobe signal to the data supply unit at regular time intervals.

In other words, the plurality of data delay units have a difference between the supply points t1, t2, t3, and t4 of the data pulses supplied from the data supply unit to the address electrode of the plasma display panel so as to be 5 ns or more and 10 ns or less. The strobe signal is applied to the data supply unit and the strobe signal delayed at regular time intervals.

Accordingly, even when a plurality of data drivers are formed, the data drivers may be divided into a plurality of address electrode groups, and the data drivers may be applied to the plurality of data drivers in the same manner as described above with reference to FIG. 9.

As described above, the technical configuration of the present invention described above will 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 respects, and the scope of the present invention is indicated by the appended claims rather than the foregoing detailed description, and the meaning and scope of the claims are as follows. 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 an effect of preventing the electrical damage of the data drive integrated circuit by reducing the amount of noise generated in the data pulse by adjusting the application point of the data pulse in accordance with each address electrode group of the data driver. have.

In addition, the present invention has the effect of reducing the voltage surge and the ripple current because the switching operation does not occur in the data drive integrated circuit (Data Drive IC) at the same time.

Furthermore, by stabilizing the address discharge, there is an effect of stabilizing the driving of the plasma display panel and suppressing the deterioration of the driving stability.

Claims (7)

A plasma display panel having a plurality of address electrodes; A data supply unit supplying image data supplied from the outside to the address electrode through a switching operation; And The plurality of address electrode groups including one or more of the address electrodes includes a data delay unit for delaying a timing control signal to supply the image data at at least one different time point and supplying the image data to the data supply unit. The data delay unit includes a first delay unit and a second delay unit, and supplies a timing control signal to the data supply unit such that a difference between supply points is 5 ns or more and 10 ns or less. Device. delete The method of claim 1, And wherein the first delay portion is a buffer and the second delay portion is a resistor. The method according to claim 1 or 3, And the data delay unit supplies three or more timing control signals having different data supply points from the first delay unit and the second delay unit to the data supply unit. delete The method of claim 1, And each of the plurality of address electrode groups has the same number of address electrodes. The method of claim 1, The number of address electrodes included in any one of the plurality of address electrode groups is different from the number of address electrodes included in the remaining address electrode groups.

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