KR100560473B1 - Plasma display device and driving method thereof - Google Patents

Abstract

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

According to the present invention, the plasma display panel includes first and second electrodes to which sustain discharge pulses are applied, a third electrode to which scan pulses are applied, and a plurality of address electrodes, respectively, formed between the first and second electrodes. Include. The plurality of electrodes is divided into a first electrode group and a second electrode group, wherein the first electrode group includes a plurality of first X electrode groups, a first M electrode group, and a first Y electrode group, and the second electrode group is And a plurality of second X electrode groups, a plurality of second M electrode groups, and a plurality of second Y electrode groups.

In such a plasma display device, sustain discharge is performed on the first electrode group by alternately applying a sustain discharge pulse to the first X electrode and the first Y electrode of the first electrode group. In addition, during a period in which sustain discharge is performed on the first electrode group, scan pulses are sequentially applied to the second M electrode of the second electrode group during periods when the sustain discharge pulse is not applied to the first Y electrode. Address discharge is performed on the second electrode group.

Intermediate electrode, 4 electrodes, address discharge, sustain discharge

Description

Plasma display device and driving method thereof {A PLASMA DISPLAY DEVICE AND A DRIVING METHOD OF THE SAME}

1 is a perspective view of a conventional plasma display panel.

FIG. 2 is a cross-sectional view of the plasma display panel shown in FIG. 1.

3 is an electrode array diagram of a conventional plasma display device.

4 is a driving waveform diagram of a conventional plasma display device.

5 is an electrode array diagram of a plasma display device according to an exemplary embodiment of the present invention.

6 and 7 are a perspective view and a cross-sectional view of the plasma display panel according to an embodiment of the present invention, respectively.

8 is a driving waveform diagram of a plasma display device according to an exemplary embodiment of the present invention.

9A to 9E are wall charge distribution diagrams when the waveform shown in FIG. 8 is applied.

10 is an electrode arrangement diagram of a plasma display device according to a second embodiment of the present invention.

11 is a driving waveform diagram of a plasma display device according to a second embodiment of the present invention.

12 is a diagram illustrating a plasma display device according to an exemplary embodiment of the present invention.

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

Recently, flat panel display devices such as liquid crystal displays (LCDs), field emission displays (FEDs), and plasma displays have been actively developed. Among these flat panel display devices, the plasma display device has advantages of higher luminance and luminous efficiency and a wider viewing angle than other flat panel display devices. Therefore, the plasma display device is in the spotlight as a display device to replace the conventional cathode ray tube (CRT) in a large display device of 40 inches or more.

Plasma display devices are flat display devices that display characters or images using plasma generated by gas discharge, and dozens to millions or more of pixels are arranged in a matrix form according to their size. The plasma display device is classified into a direct current type (DC type) and an alternating current type (AC type) according to the shape of a driving voltage waveform to be applied and the structure of a discharge cell.

In the DC plasma display device, since the electrode is exposed to the discharge space as it is, the current flows in the discharge space while the voltage is applied, and there is a disadvantage in that a resistance for current limitation must be made for this purpose. On the other hand, in the AC plasma display device, since the electrode covers the dielectric layer, the current is limited by the formation of a natural capacitance component, and thus the electrode is protected from the impact of ions during discharge.

1 is a partial perspective view of a conventional AC plasma display panel, and FIG. 2 is a cross-sectional view of the plasma display panel shown in FIG. 1.

1 and 2, the X electrode 3 and the Y electrode 4 covered with the dielectric layer 14 and the passivation layer 15 are arranged in parallel on the first glass substrate 11. At this time, the X electrode and the Y electrode is made of a transparent conductive material. Bus electrodes 6 made of metal materials are formed on the surfaces of the X and Y electrodes 3 and 4, respectively.

A plurality of address electrodes 5 are provided on the second glass substrate 12, and the address electrodes 5 are covered by the dielectric layer 14 '. A partition 17 is formed on the dielectric layer 14 ′ between the address electrodes 5 in parallel with the address electrode 5. In addition, phosphors 18 are formed on the surface of the dielectric layer 14 'and on both sides of the partition wall 17. The first glass substrate 11 and the second glass substrate 12 have a discharge space 19 therebetween so that the Y electrode 4 and the address electrode 5 and the X electrode 3 and the address electrode 5 are orthogonal to each other. Are placed opposite to each other. The discharge space at the intersection of the address electrode 5 and the paired Y electrode 4 and the X electrode 3 forms a discharge cell 19.

3 shows an electrode arrangement diagram of a conventional plasma display device.

As shown in Fig. 3, the conventional plasma display electrode has a matrix configuration of m> n. The address electrodes A1 to Am are arranged in the column direction, and the n electrodes Y1 to Yn and the X electrodes X1 to Xn are arranged in a zigzag pattern in the row direction. The discharge cell 20 shown in FIG. 3 corresponds to the discharge cell 19 shown in FIG.

4 is a driving waveform diagram of a conventional plasma display device.

According to the driving method of the plasma display device shown in Fig. 4, each subfield is composed of a reset section, an address section, and a sustain section.

The reset section serves to erase the wall charge state of the previous sustain discharge and to set up wall charge in order to stably perform the next address discharge.

The address period is a period in which a wall charge is accumulated in a cell (addressed cell) that is turned on by selecting a cell that is turned on and a cell that is not turned on in the panel.

The sustain period is a period in which a sustain discharge voltage is alternately applied to the X electrode and the Y electrode to perform discharge for actually displaying an image on the addressed cell.

Hereinafter, the operation of the reset section of the conventional plasma display device driving method will be described in more detail. As shown in Fig. 4, the reset section is composed of an erase section, a Y ramp up section and a Y ramp down section.

(1) erasure interval (I)

During this period, a falling ramp that slowly descends from the sustain discharge voltage Vs to the ground potential is applied to the Y electrode while the X electrode is biased to a constant potential Vbias to remove the wall charges formed in the previous sustain period. .

(2) Y ramp up period (Ⅱ)

During this period, the address electrode and the X electrode are kept at 0 V, and a ramp voltage rising slowly from the voltage Vs toward the voltage Vset is applied to the Y electrode. While this lamp voltage rises, weak reset discharge occurs in all discharge cells from the Y electrode to the address electrode and the X electrode, respectively. As a result, negative wall charges are accumulated at the Y electrode, and positive wall charges are accumulated at the address electrode and the X electrode at the same time.

(3) Y ramp descending section (Ⅲ)

Subsequently, in the second half of the reset period, while the X electrode is held at the constant voltage Vbias, a ramp voltage that gently falls from the voltage Vs toward the ground voltage is applied to the Y electrode. While this ramp voltage is falling, weak reset discharge occurs again in all the discharge cells.

However, according to the conventional plasma display device, the addressing operation from the first Y electrode to the last Y electrode is completed, and then the sustain discharge operation is simultaneously performed for all the discharge cells. Therefore, since there is not enough priming particles generated in the discharge cell when the first sustain discharge pulse is applied after the address period, there is a problem that discharge failure occurs.

In addition, according to the conventional plasma display device, since the waveform applied to the Y electrode (the waveform for reset and scan is additionally applied to the Y electrode) and the waveform applied to the X electrode are different from each other, The circuit for driving the circuit and the X electrode are different. Accordingly, the driving circuits of the X electrode and the Y electrode do not have impedance matching, so that waveforms alternately applied to the X electrode and the Y electrode in the sustain discharge period are distorted, thereby causing a problem of discharge failure.

 SUMMARY OF THE INVENTION The present invention has been made in an effort to solve the problems of the prior art, and to provide a plasma display device and a driving method thereof for preventing discharge failure.

In order to achieve the above object or the driving method of the plasma display device according to the characteristics of the present invention

A plurality of X electrodes and a plurality of Y electrodes each formed alternately, a plurality of M electrodes formed between the X electrodes and the Y electrodes adjacent to each other, and a plurality of address electrodes, respectively; A driving method of a plasma display device in which a M electrode and an address electrode define discharge cells,

The plasma display device includes two or more discharge cell groups including a first discharge cell group defined by a first electrode group and a second discharge cell group defined by a second electrode group, and the first electrode group includes: A plurality of first X electrode groups, a first M electrode group, and a first Y electrode group, wherein the second electrode group includes a plurality of second X electrode groups, a plurality of second M electrode groups, and a plurality of second Y groups An electrode group,

The driving method is

(a) performing an addressing operation on the first discharge cell group in a first section;

(b) performing a sustain discharge operation on the first discharge cell group and performing an addressing operation on the second discharge cell group in a second period after the first period; And

(c) performing a sustain discharge operation on the second discharge cell group in a third section, which is a section after the second section.

On the other hand, the driving method of the plasma display device according to another aspect of the present invention

A driving method of a plasma display device comprising a first electrode and a second electrode to which a sustain discharge pulse is applied, a third electrode formed between the first electrode and a second electrode, to which a scan pulse is applied, and a plurality of address electrodes, respectively. ,

The plasma display device includes a first electrode group including a plurality of first X electrode groups, a first M electrode group, and a first Y electrode group, the plurality of second X electrode groups, a plurality of second M electrode groups, and A second electrode group including a plurality of second Y electrode groups,

The driving method is

(a) performing sustain discharge on the first electrode group by alternately applying a sustain discharge pulse to the first X electrode and the first Y electrode of the first electrode group; And

(b) sequentially applying scan pulses to the second M electrode of the second electrode group during periods in which the sustain discharge pulse is not applied to the first Y electrode during the period of performing the sustain discharge to the first electrode group; Performing address discharge on the second electrode group.

On the other hand, the plasma display device according to the features of the present invention

A plasma display panel including a plurality of X electrodes and a plurality of Y electrodes formed alternately, a plurality of M electrodes respectively formed between adjacent X electrodes and Y electrodes, and a plurality of address electrodes;

A first driving circuit unit providing a driving signal to a first electrode group including a plurality of first X electrode groups, a first M electrode group, and a first Y electrode group of the plasma display panel; And

And a second driving circuit unit configured to provide a driving signal to a second electrode group including a plurality of second X electrode groups, a plurality of second M electrode groups, and a plurality of second Y electrode groups of the plasma display panel.

Here, the first driving circuit unit performs sustain discharge on the first electrode group by alternately applying a sustain discharge pulse to the first X electrode and the first Y electrode of the first electrode group, and the second driving circuit unit During the period in which the sustain discharge is performed on the first electrode group, scan pulses are sequentially applied to the second M electrode of the second electrode group during periods when the sustain discharge pulse is not applied to the first Y electrode. Address discharge is performed on the two electrode groups.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

5 shows an electrode arrangement diagram of a plasma display device according to an embodiment of the present invention.

As shown in Fig. 5, in the plasma display device according to the embodiment of the present invention, the address electrodes A1 to Am are arranged in parallel in the column direction, and the Y electrodes Y1 to Y _n of n / 2 + 1 rows are arranged. _{/ 2 + 1} ), X electrodes (X1 to X _{n / 2 + 1} ), and middle electrodes (hereinafter, referred to as 'M electrodes') of n rows are arranged. That is, according to the embodiment of the present invention, the M electrode is arranged in the middle of the Y electrode and the X electrode, and the Y electrode, the X electrode, the M electrode, and the address electrode have a four-electrode structure in which one discharge cell 30 is formed. .

At this time, according to the embodiment of the present invention, the X electrode and the Y electrode mainly serve as an electrode for applying a sustain discharge voltage waveform, and the M electrode mainly serves for applying a reset waveform and a scan pulse voltage.

6 is a perspective view of a plasma display panel according to an embodiment of the present invention, and FIG. 7 is a cross-sectional view of the plasma display panel shown in FIG.

6 and 7, a plasma display panel according to an exemplary embodiment of the present invention includes a first substrate 41 and a second substrate 42. The X electrode 53 and the Y electrode 54 are formed on the first substrate 41. In addition, a bus electrode 46 is formed on the X electrode 53 and the Y electrode 53. The dielectric layer 44 and the passivation layer 45 are sequentially formed on the X and Y electrodes 53 and 54.

Meanwhile, an address electrode 55 is formed on the surface of the second substrate 42, and a dielectric layer 44 ′ is formed on the address electrode 55. The partition wall 47 is formed on the dielectric layer 44 ′ to form a cell 49 that is a discharge space between the partition walls 47. Phosphor 48 is applied to the surface of the partition wall 47 in the cell space between the partition walls 47. The X and Y electrodes 53 and 54 are formed at right angles to the address electrode 55.

In this case, according to the exemplary embodiment of the present invention, the intermediate electrode 56 is formed between the pair of X electrodes 53 and the Y electrodes 54 formed on the surface of the first substrate 41. As described above, a reset waveform and a scan waveform are mainly applied to this intermediate electrode. The bus electrode 46 is formed on the intermediate electrode 56.

The plasma display panel according to the exemplary embodiments of the present invention shown in FIGS. 5 to 7 has a structure in which intermediate electrodes are disposed between Xi and Y _i electrodes and between Y _i and X _{i + 1} electrodes. That is, when there are n / 2 + 1 X electrode and Y electrode, the structure with n M electrodes is shown. However, the M electrode 56 may exist only between the X _i electrode 53 and the Y _i electrode 54, and there may be an electrode arrangement in which no M electrode exists between the Y _i electrode and the X _{i + 1} electrode. In this case, the number of X electrodes, Y electrodes, and M electrodes is equal to n.

FIG. 8 is a driving waveform diagram of the plasma display device according to the first exemplary embodiment of the present invention, and FIGS. 9A to 9E are diagrams showing wall charge distribution according to the driving waveform shown in FIG.

Hereinafter, a driving method according to a first embodiment of the present invention will be described with reference to FIGS. 8 and 9A to 9E.

According to the driving method according to the first embodiment of the present invention shown in Fig. 8, each subfield is composed of a reset section, an address section, and a sustain section.

According to an exemplary embodiment of the present invention, the reset section includes an erasing section, an M electrode rising waveform section, and an M electrode falling waveform section.

(1-1) erasure interval (I)

This section serves to erase wall charges formed in the previous sustain discharge section. According to the exemplary embodiment of the present invention, it is assumed that the sustain discharge voltage pulse is applied to the X electrode at the last time point of the sustain discharge period, and that a voltage lower than the voltage applied to the X electrode (eg, the ground voltage) is applied to the Y electrode. Then, as shown in Fig. 9A, positive wall charges are formed on the Y electrode and the address electrode, and negative wall charges are formed on the X electrode and the M electrode.

In the erase period, a waveform (ramp waveform or log waveform) that gently falls from the voltage Vmc to the ground voltage is applied to the M electrode while the Y electrode is biased with the voltage Vyc. Then, the wall charges formed during the sustain discharge period are erased as shown in Fig. 7A.

(1-2) M electrode rising wave section (II)

During this period, a waveform (ramp waveform or log waveform) that rises slowly from the voltage Vmd to Vset is applied to the M electrode while the X electrode and the Y electrode are biased to the ground voltage. While this rising waveform is applied, weak reset discharges occur from the M electrodes to the address electrodes, the X electrodes, and the Y electrodes, respectively, in all the discharge cells. As a result, as shown in Fig. 9B, negative wall charges are accumulated at the M electrode, and positive wall charges are accumulated at the address electrode, the X electrode, and the Y electrode at the same time.

(1-3) M electrode falling waveform section (III)

Subsequently, in the second half of the reset period, while the X electrode and the Y electrode are biased at Vxe and Vye, waveforms (lamp waveforms or log waveforms) are gradually applied to the M electrodes from the voltage Vme to the ground voltage. At this time, it is preferable to set Vxe = Vye and Vmd = Vme in that the circuit configuration can be simplified, but is not necessarily limited thereto.

While this ramp voltage is falling, weak reset discharge occurs again in all the discharge cells. At this time, since the M electrode falling waveform section is for slowly decreasing the wall charges accumulated by the M electrode rising waveform section, the wall charge amount that is decreased as the time of the falling waveform is longer (that is, the slope is gentler) is precisely controlled. This is advantageous for address discharge.

As a result of applying the falling waveform to the M electrode, the wall charges accumulated on each electrode of all the cells are evenly erased. As shown in Fig. 9C, positive wall charges are accumulated on the address electrode, and at the same time, the X electrode and the Y electrode And negative wall charges are accumulated on the M electrode.

(2) Address section (scan section)

In the address period, scan pulses are sequentially applied to the M electrodes while the plurality of M electrodes are biased to the Vsc voltage, and a scan pulse is applied to the M electrodes. Apply an address voltage to the cell). At this time, the X electrode is maintained at the ground voltage, and the voltage Vye is applied to the Y electrode. (I.e., apply a voltage higher than the voltage of the X electrode to the Y electrode.)

Then, discharge occurs between the M electrode and the address electrode, and the discharge extends to the X electrode and the Y electrode. As a result, as shown in Fig. 9D, positive charges are accumulated on the X electrode and the M electrode, and Y Negative wall charges are stored in the electrodes and the address electrodes.

(3) maintenance discharge section

According to the sustain discharge section according to the embodiment of the present invention, the sustain discharge voltage pulse is alternately applied to the X electrode and the Y electrode while the M electrode is biased at the sustain discharge voltage Vm. The sustain discharge occurs in the discharge cells selected in the address section through the application of such a voltage.

At this time, according to the embodiment of the present invention, the discharge is caused by different discharge mechanisms at the initial and the normal time of the sustain discharge. For convenience of explanation, hereinafter, the discharge generated at the beginning of the sustain discharge is referred to as a short-gap discharge section, and the discharge at the normal time point is referred to as a long-gap discharge section.

(3-1) Short gap discharge section

In the start period of sustain discharge, as shown in Figs. 9E and 9B, a positive voltage pulse is applied to the X electrode and a negative voltage pulse is applied to the Y electrode (where, + and- Is a relative concept comparing the magnitude of the voltage applied to the X electrode and the voltage applied to the Y electrode, and the fact that + pulse voltage is applied to the X electrode means that a voltage greater than the Y electrode is applied to the X electrode. At the same time, a positive voltage pulse is applied to the M electrode. Therefore, unlike the conventional case where the discharge occurs only between the X electrode and the Y electrode, the discharge occurs between the X electrode / M electrode and the Y electrode. In particular, according to the embodiment of the present invention, since the distance between the M electrode and the Y electrode is closer than the distance between the X electrode and the Y electrode, the electric field applied between the M electrode and the Y electrode becomes larger. Therefore, the discharge between the M electrode and the Y electrode plays a dominant role than the discharge between the X electrode and the Y electrode. As described above, in the embodiment of the present invention, since the discharge between the M electrode and the Y electrode having a relatively short distance at the beginning of the sustain discharge plays a dominant role, it is called a short gap discharge.

As described above, according to the embodiment of the present invention, since a short gap discharge occurs by applying a relatively high electric field at the initial stage of sustain discharge, sufficient priming particles in the discharge cell are applied when the first sustain discharge pulse is applied after the address period. Even if it is not produced, sufficient discharge can be performed.

(3-2) Long gap discharge section

After application of the first sustain discharge pulse of sustain discharge, the voltage between the M electrode and the X electrode or the discharge between the M electrode and the Y electrode (i.e., a short gap discharge) because the voltage of the M electrode is biased to a constant voltage (Vs). The degree of contribution to the silver discharge is small so that the main discharge becomes a discharge between the X electrode and the Y electrode, and thus an image inputted by the number of discharge pulses applied alternately to the X electrode and the Y electrode can be displayed.

That is, as shown in (d) of FIG. 9E, negative wall charges continuously accumulate on the M electrode, and negative (−) wall charges and (+) walls alternately on the X electrode and the Y electrode in the sustain discharge section in the steady state. Charges accumulate.

As described above, according to the embodiment of the present invention, since the discharge is performed by the short gap discharge of the X electrode and the M electrode (or between the Y electrode and the M electrode) at the initial stage of the sustain discharge, sufficient discharge is performed even in a state where there are few priming particles, and In the state, since the discharge is performed by the long gap discharge between the X electrode and the Y electrode, stable discharge can be performed.

Further, according to the embodiment of the present invention, since the voltage waveforms which are substantially symmetrical are applied to the X electrode and the Y electrode, the circuits for driving the X electrode and the Y electrode can be designed almost identically. Therefore, since the difference in circuit impedance between the X electrode and the Y electrode can be almost eliminated, it is possible to reduce the distortion of the pulse waveform applied to the X electrode and the Y electrode in the sustain discharge section, thereby achieving stable discharge.

According to the first embodiment of the present invention shown in FIG. 8, the waveforms of the X electrode and the Y electrode can be driven even if they are reversed, and the driving can be performed even if the waveforms of the X electrode and the Y electrode are changed in the address period.

According to the driving method according to the first embodiment of the present invention described above, a reset waveform and a scan pulse waveform are mainly applied to the M electrode, and a sustain voltage waveform is mainly applied to the X electrode and the Y electrode. In this case, the reset waveform applied to the M electrode may be applied to various types of reset waveforms as well as the reset waveform shown in FIG. 8.

In this case, when applying the reset waveform of various forms to the four-electrode structure according to the embodiment of the present invention, it is preferable to satisfy the following conditions.

First, the voltage waveform Rm (v) applied to the M electrode in the rising reset waveform section is larger than the voltage waveform Rx (v) applied to the X electrode or the voltage waveform Ry (v) applied to the Y electrode. Should be set. (Rm (v)〉 (Rx (v) or Ry (v))

Second, in the falling reset waveform section, the voltage waveform Fm (v) applied to the M electrode is greater than the voltage waveform Fx (v) applied to the X electrode or the voltage waveform Fy (v) applied to the Y electrode. It should be set small. (Fm (v) 〈(Fx (v) or Fy (v))

Third, in the address period, the voltage waveform Am (v) applied to the M electrode is set smaller than the voltage waveform Ax (v) applied to the X electrode or the voltage waveform Ay (v) applied to the Y electrode. Should be. (Am (v) 〈(Ax (v) or Ay (v))

Fourth, at the time of the sustain discharge period, the voltage waveform Sm (v) applied to the M electrode is greater than the voltage waveform Sx (v) applied to the X electrode or the voltage waveform Sy (v) applied to the Y electrode. It should be set large. (Am (v) < (Ax (v) or Ay (v)) Furthermore, the voltage waveform Sm (v) applied to the M electrode at the time of the sustain discharge period is applied to the M electrode at the address period Am. (v)) (Sm (v)> Am (v))

10 shows an electrode arrangement diagram of a plasma display device according to a second embodiment of the present invention.

According to the second embodiment of the present invention, after dividing the discharge cells consisting of the X electrode, the Y electrode, the M electrode and the address electrode into two or more discharge groups, the discharge cells are discharged to the other discharge group while the sustain discharge is performed for one discharge group. Addressing operation is performed. In this case, there may be various methods of dividing the plurality of discharge cells into two or more discharge groups. In the embodiment of the present invention illustrated in FIG. 10, the discharge groups are based on the odd-numbered X electrodes and the even-numbered X electrodes. Divide

As shown in FIG. 10, according to the second embodiment of the present invention, the X electrode is a first X electrode group (X-odd) consisting of odd-numbered X electrodes and a second X electrode group consisting of even-numbered X electrodes ( X-even). The middle electrode between the odd-numbered X electrode and the Y electrode (M electrode; M1, M2, M5, M6 ...) is the first M electrode group, and the middle electrode between the even-numbered X electrode and the Y electrode (M electrode). M3, M4, M7, M8) is divided into a second M electrode group.

In addition, a Y electrode group which is associated with the first X electrode group and the first M electrode group to form a discharge cell is called a first Y electrode group, and the first X electrode group, the first M electrode group, and the first Y electrode The group including the group is called a first electrode group. Similarly, the Y electrode group associated with the second X electrode group and the second M electrode group to form a discharge cell is called a second Y electrode group, and the second X electrode group, the second M electrode group, and the second Y electrode The group including the group is called a second electrode group.

 11 is a view showing a driving waveform of the plasma display device according to the second embodiment of the present invention.

As shown in FIG. 11, according to the second embodiment of the present invention, the first electrode group and the second electrode group are driven independently, and in particular, the address section of the first electrode group and the address section of the second electrode group It is different. Hereinafter, an operation according to a second embodiment of the present invention will be described in detail with reference to FIG. 11.

(1) Reset section (Ⅰ)

A reset waveform is commonly applied to the first M electrode group and the second M electrode group to erase the wall charge state of the previous sustain discharge, and set up the wall charge to stably perform the next address discharge. In this case, since the detailed operation description of the reset section has already been described with reference to FIG. 8, duplicate description thereof will be omitted.

(2) First electrode group addressing section (II)

The first electrode group is scanned to address a desired discharge cell. That is, scan pulses are sequentially applied to the first M electrode, and at the same time, an address voltage is applied to an address electrode corresponding to a cell (that is, a cell to be turned on) to be discharged. In this case, since the operation of performing the addressing in the first electrode group has already been described with reference to FIG. 8, duplicate description thereof will be omitted. On the other hand, in this section, the second electrode group is biased with a constant voltage without applying a scan pulse. As a result, addressing is not performed in the second electrode group.

(3) First electrode group sustain discharge-second electrode group addressing section (III)

The discharge cells of the first electrode group in which the address discharge has occurred perform sustain discharge, and the second electrode group in which the address discharge does not occur performs addressing. In this case, since the description of the sustain discharge of the first electrode group is the same as the operation in the sustain period described with reference to FIG. 8, overlapping description is omitted.

In this period, in order for the address discharge to occur in the second electrode group, a scan pulse is applied to the M electrode, the X electrode must maintain the bias voltage, and the Y electrode must maintain the ground voltage. In Fig. 11, the period indicated by 'A' satisfies this condition, and the period indicated by 'B' does not satisfy this condition. Therefore, according to the second embodiment of the present invention, the scan pulse is applied to the M electrode only in the A region to perform normal addressing discharge.

As such, when the second electrode group performs the addressing operation when the first electrode group performs the sustain discharge, the priming effect is generated by the sustain discharge of the first electrode group, and the charges are transferred to the second electrode group adjacent thereto. This has the advantage that it can assist in the addressing operation of the two electrode group.

(4) Second electrode group sustain discharge section (IV)

The sustain discharge is performed on the second electrode group. In this case, since the sustain discharge operation of the second electrode group has already been described with reference to FIG. 8, redundant description thereof will be omitted.

In the second embodiment of the present invention shown in FIG. 11, the first electrode group is first addressed and the second electrode group is addressed at the sustain discharge of the first electrode group. However, the second electrode group is addressed. First, addressing may be performed, and addressing may be performed on the first electrode group during the sustain discharge of the second electrode group. Further, in the second embodiment of the present invention, the sustain discharge is not performed in the first electrode group during the sustain discharge of the second electrode group. In addition, the first electrode group and the second electrode group may also perform the sustain discharge.

12 is a diagram illustrating a plasma display device according to an exemplary embodiment of the present invention.

As shown in FIG. 12, a plasma display device according to an exemplary embodiment of the present invention includes a plasma display panel 100, an address driver 200, a Y electrode driver 300, and first and second X electrode drivers 420. 440, first and second M electrode drivers 520 and 540, and a controller 600.

The plasma display panel 100 includes a plurality of address electrodes A1 to Am arranged in the column direction, a plurality of Y electrodes Y1 to Yn arranged in the row direction, X electrodes X1 to Xn, and M _ij electrodes. It includes. In this case, the M _ij electrode refers to an electrode formed between the Y _i electrode and the X _j electrode.

The address driver 200 receives an address driving control signal S _A from the controller 600 and applies a display data signal for selecting a discharge cell to be displayed to each address electrode.

The Y electrode driver 300 receives the Y electrode driving signal S _Y from the controller 600 and applies the waveform shown in FIG. 11 to the Y electrode.

The first and second X electrode driving units 420 and 440 receive the first X electrode driving signal S _X1 and the second X electrode driving signal S _X2 from the control unit 600, respectively, as shown in FIG. 11. The waveform is applied to the X electrode of the first electrode group and the X electrode of the second electrode group.

The first and second M electrode driving units 520 and 540 receive the first M electrode driving signal S _M1 and the second M electrode driving signal S _M2 from the control unit 600, respectively. The waveform is applied to the M electrode of the first electrode group and the M electrode of the second electrode group, respectively.

The control unit 600 receives an image signal from the outside, and thus, the address driving control signal S _A , the Y electrode driving signal S _Y , the first X electrode driving signal S _X1 , and the second X electrode driving signal S _X2 ), the first M electrode driving signal S _M1 and the second M electrode driving signal S _M2 are generated.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various other modifications and changes are possible. For example, in the exemplary embodiment shown in FIGS. 10 and 11, the X electrode is divided into an odd-numbered X electrode group and an even-numbered X electrode group, and then driven by dividing the X electrode into two groups. The X electrode group can be divided in a manner. In addition, although the discharge group is divided into two groups in the embodiment of the present invention, it may be divided into three or more groups.

As described above, according to the present invention, a discharge failure is achieved by forming an intermediate electrode between the X electrode and the Y electrode, applying a reset waveform and a scan waveform to the intermediate electrode, and applying a sustain discharge voltage waveform to the X electrode and the Y electrode. Can be prevented.

In addition, according to the present invention, since the discharge group consisting of the intermediate electrode, the X electrode and the Y electrode is two or more, and the other discharge group performs the addressing operation when one discharge group performs the sustain discharge, the addressing operation is more effective. It is made stable.

Claims (18)

A plurality of X electrodes and a plurality of Y electrodes each formed alternately, a plurality of M electrodes formed between the X electrodes and the Y electrodes adjacent to each other, and a plurality of address electrodes, respectively; A driving method of a plasma display device in which a M electrode and an address electrode define discharge cells, The plasma display device includes at least two discharge cell groups including a first discharge cell group defined by a first electrode group and a second discharge cell group defined by a second electrode group. The first electrode group includes a plurality of first X electrode groups, a first M electrode group, and a first Y electrode group, and the second electrode group includes a plurality of second X electrode groups and a plurality of second M electrode groups. And a plurality of second Y electrode groups, The driving method is (a) performing an addressing operation on the first discharge cell group in a first section; (b) performing a sustain discharge operation on the first discharge cell group and performing an addressing operation on the second discharge cell group in a second period after the first period; And and (c) performing a sustain discharge operation on the second discharge cell group in a third section after the second section. The method of claim 1, and (d) performing a reset operation on the first discharge cell group and the second discharge cell group in a fourth section that is a section before the first section. The method of claim 2, In the step (d), applying a reset waveform to the M electrode to perform a reset operation. The method of claim 2, And in step (a) and step (b), a scan pulse is applied to the M electrode to perform an address operation. The method of claim 4, wherein In the address operation in step (a), And applying a first voltage to the X electrode and applying a second voltage greater than the first voltage to the Y electrode. The method of claim 4, wherein And in the step (b) and the step (c), a sustain discharge operation is performed by alternately applying a sustain discharge pulse to the X electrode and the Y electrode. The method of claim 6, In the step (b), a scan pulse is applied to an M electrode belonging to the second discharge cell group in a section in which a sustain discharge pulse is not applied to the Y electrode belonging to the first discharge cell group, thereby providing the second discharge cell group. A method of driving a plasma display device, characterized in that to perform an addressing operation on a device. The method of claim 6, In the step (b) and the step (c), during the first period of the sustain discharge operation, And applying a sustain discharge pulse and a third voltage to the X electrode and the Y electrode, respectively, and applying a fourth voltage greater than the third voltage to the M electrode. The method of claim 8, And the first period is a period in which a first sustain discharge occurs. The method of claim 8, During the second period of the sustain discharge operation, And applying sustain discharge pulses alternately to the X and Y electrodes, and biasing the M electrode to the fourth voltage. The method according to claim 2 or 3, The reset operation Applying an erase voltage to the M electrode; Applying a rising waveform rising from a first voltage to a second voltage to the M electrode; And And applying a falling waveform falling from the third voltage to the fourth voltage to the M electrode. The method according to claim 1 or 2, Applying a first voltage to the X electrode and applying a second voltage greater than the first voltage to the Y electrode in an address operation period; And In a first sustain discharge period, a third voltage is applied to the X electrode, a fourth voltage lower than a third voltage is applied to the Y electrode, and a first voltage greater than the first voltage or the fourth voltage is applied to the M electrode. 5. A method of driving a plasma display device comprising applying a voltage. The method of claim 12, And a scan pulse is applied to the intermediate electrode in the address operation period. The method according to any one of claims 1 to 10, Wherein the first X electrode group is an odd-numbered X electrode, and the second X electrode group is an even-numbered X electrode. And a third electrode formed between the first and second electrodes to which the sustain discharge pulses are respectively applied, the third electrode to which the scan pulses are applied, and a plurality of address electrodes. In The plasma display device includes a first electrode group including a plurality of first X electrode groups, a first M electrode group, and a first Y electrode group, the plurality of second X electrode groups, a plurality of second M electrode groups, and A second electrode group including a plurality of second Y electrode groups, The driving method is (a) performing sustain discharge on the first electrode group by alternately applying a sustain discharge pulse to the first X electrode and the first Y electrode of the first electrode group; And (b) sequentially applying scan pulses to the second M electrode of the second electrode group during periods in which the sustain discharge pulse is not applied to the first Y electrode during the period of performing the sustain discharge to the first electrode group; And performing an address discharge on the second electrode group. The method of claim 15, Wherein the first X electrode group is an odd-numbered X electrode, and the second X electrode group is an even-numbered X electrode. A plasma display panel including a plurality of X electrodes and a plurality of Y electrodes formed alternately, a plurality of M electrodes respectively formed between adjacent X electrodes and Y electrodes, and a plurality of address electrodes; A first driving circuit unit providing a driving signal to a first electrode group including a plurality of first X electrode groups, a first M electrode group, and a first Y electrode group of the plasma display panel; And A second driving circuit unit configured to provide a driving signal to a second electrode group including a plurality of second X electrode groups, a plurality of second M electrode groups, and a plurality of second Y electrode groups of the plasma display panel; The first driving circuit unit performs sustain discharge on the first electrode group by alternately applying sustain discharge pulses to the first X electrode and the first Y electrode of the first electrode group. The second driving circuit unit sequentially scan pulses to the second M electrode of the second electrode group during periods when the sustain discharge pulse is not applied to the first Y electrode during the period of performing the sustain discharge to the first electrode group. And applying an address discharge to the second electrode group. The method of claim 17, The first driving circuit part A first X electrode driver for applying a sustain discharge voltage pulse to the first X electrode group; A first Y electrode driver for applying a sustain discharge voltage pulse to the first Y electrode group; And A first M driver configured to sequentially apply a scan pulse voltage to the plurality of M electrodes of the first M electrode group; The second driving circuit part A second X electrode driver for applying a sustain discharge voltage pulse to the second X electrode group; A second Y electrode driver configured to apply a sustain discharge voltage pulse to the second Y electrode group; And And a second M driver configured to sequentially apply scan pulse voltages to the plurality of M electrodes of the second M electrode group.

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