KR100351828B1 - Driving method for plasma display panel - Google Patents

Abstract

The present invention generates a sufficient amount of space charge by inducing a counter discharge between the sustain electrode and the address electrode before the surface discharge between the sustain electrodes in the sustain period, and then induces a surface discharge between the sustain electrodes to obtain a discharge start voltage and power consumption. To provide a method of driving a plasma display panel which can be reduced, the method of driving a plasma display panel of the present invention is a long-pass structure having two sustain electrodes and an address electrode formed in a direction orthogonal to the sustain electrodes. 3. A method of driving a three-electrode surface discharge plasma display panel, characterized in that the discharge in the sustain period comprises a step in which the opposite discharge occurs between the sustain electrode and the address electrode, and the surface discharge occurs between the sustain electrodes.

Description

Driving method for plasma display panel {Driving method for plasma display panel}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to flat panel displays, and more particularly to a plasma display panel (hereinafter referred to as "PDP").

In general, PDPs and liquid crystal displays (LCDs) are spotlighted as next-generation displays having the highest practicality among flat panel displays. In particular, PDP has high brightness and wide viewing angle compared to LCD, and its application is widespread as a thin large display such as outdoor advertising tower, wall-mounted TV, and theater display.

PDP uses a method of displaying and emitting light by using gas discharge. The PDP is classified into an AC type PDP having a dielectric layer formed on an electrode surface and a DC type PDP whose surface is exposed to a discharge space. In the AC type PDP, a phosphor is formed on the dielectric layer, and in the DC type PDP, a phosphor is formed on the electrode. The PDP emits the phosphor by irradiating the phosphor with ultraviolet rays generated by gas discharge.

Hereinafter, a plasma display panel according to the related art will be described with reference to the accompanying drawings.

1 illustrates a cross-sectional structure of an AC type PDP of a three-electrode surface discharge method according to the prior art.

As shown in FIG. 1, the sustain electrodes 4 and 4a (hereinafter, referred to as Y and Z electrodes) and the sustain electrodes 4 and 4a formed at a predetermined distance on the same surface of the front glass substrate 1 are provided. An upper structure consisting of a dielectric layer 2 formed on the field by a printing technique, a protective layer 3 formed on the dielectric layer 2, and an address electrode formed on the rear glass substrate 11 of the upper structure in a direction orthogonal to the sustain electrodes. (12) (hereinafter referred to as an X electrode), a partition wall 6 formed between the X electrodes 12 to prevent crosstalk between adjacent cells, and the partition wall 6 and the X electrode. (12) and a lower structure composed of phosphors 8 formed around the discharge structure 5 formed by encapsulating an inert gas in a space between the upper structure and the lower structure.

For reference, Figure 1 is shown by rotating the upper structure 90 ° for convenience of description.

In the three-electrode surface discharge type AC PDP, when a driving voltage is applied between the X electrode and the Y electrode, opposite discharge occurs between the X electrode and the Y electrode, and wall charges are generated on the surface of the protective layer of the upper structure. When the discharge voltages having opposite polarities are continuously applied to the Y electrode and the Z electrode and the driving voltage applied to the X electrode is cut off, the dielectric layer 2 and the dielectric layer 2 and the Z electrode are caused by a potential difference generated between the Y electrode and the Z electrode by wall charge. Surface discharge occurs in the discharge region on the surface of the protective layer 3. As a result, ultraviolet rays are generated from the inert gas in the discharge region. The fluorescent substance 8 is excited by this ultraviolet-ray, and color display is performed by the emitted fluorescent substance.

2 shows waveforms of pulses applied to the electrodes of the PDP, and each pulse shows a different waveform in the reset section, the address section, and the sustain section.

The reset pulse 21 of the scan voltage output from the Y electrode driver (not shown) is simultaneously applied to all the Y electrodes of each discharge cell of the PDP. The Y electrode driver inserts a scan pulse 22 between the sustain pulses 80 of the scan voltage applied to the Y electrode to cause a counter discharge with respect to the X electrode with reference to the scan data. At this time, the X electrode receives the address pulse 60 output from the X electrode driver (not shown). Although not shown in the figure, the sustain voltage applied to the Z electrode is a pulse whose phase is opposite in phase to that of the sustain pulse 80 of the scan voltage. The address pulse 60 applied to the X electrode is a waveform synchronized with the scan pulse 22 applied to the Y electrode and whose phase is opposite to the scan pulse. Therefore, the X electrode and the Y electrode face opposite discharges due to the voltage difference between the address pulse and the scan pulse, and the Y electrode and the Z electrode cause surface discharge due to the voltage difference between the sustain pulse and the sustain voltage of the scan voltage. After that, when an erase pulse is applied to the scan voltage, the surface discharge is stopped and the discharge cell is turned off.

In the conventional plasma display panel, surface discharge occurs between the sustain electrodes 4 and 4a in the sustain period, and the surface discharge increases in efficiency as the distance between the two electrodes increases. Therefore, a long-path structure has been proposed to widen the distance between the Y electrode and the Z electrode with the intention of increasing the efficiency of surface discharge.

That is, it was intended to increase the discharge efficiency by arranging the distance d1 between the Y electrode and the Z electrode, which is the sustain electrode, to be 100 μm or more.

However, the conventional plasma display panel as described above has the following problems.

In the sustain period, surface discharge occurs only between the Y electrode and the Z electrode, which are sustain electrodes. When the distance between the two electrodes is increased for long-path discharge for the purpose of high efficiency discharge, the discharge start voltage is increased. Very high.

In addition, when the width of the electrode is increased in order to use the long-pass discharge, a large amount of discharge current is required, which increases the power consumption.

The present invention has been made to solve the above problems of the prior art, and in the sustain period before the surface discharge between the sustain electrode induces the opposite discharge between the sustain electrode and the address electrode to generate a sufficient amount of space charge to effectively maintain the sustain electrode It is an object of the present invention to provide a method of driving a plasma display panel which can reduce discharge start voltage and power consumption even in a long-pass structure by inducing surface discharge.

1 is a cross-sectional view of a plasma display panel according to a conventional three-electrode surface discharge structure

2 is a waveform diagram of a conventional pulse applied to each electrode

3 is a cross-sectional view of a structure of a plasma display panel having a 3-electrode surface discharge structure according to the present invention;

4 is a pulse waveform diagram between a sustain electrode and an address electrode according to the driving method of the plasma display panel of the present invention;

Explanation of symbols for main parts of the drawings

1,31: Front glass substrate 11,41: Back substrate

2,32 dielectric layer 3,33 protective layer

6,36: partition 8,38: phosphor layer

12,42 X electrode 4,34 Y electrode

4a, 34a: Z electrode

The driving method of the plasma display panel of the present invention for achieving the above object is a method of driving a surface-discharge plasma display panel having a long-pass structure having two sustain electrodes and address electrodes formed in a direction orthogonal to the sustain electrodes. The discharge in the sustain period may include a step in which a counter discharge occurs between the sustain electrode and the address electrode and a surface discharge occurs between the sustain electrode and the sustain electrode.

Hereinafter, a driving method of the plasma display panel of the present invention will be described with reference to the accompanying drawings.

3 is a structural cross-sectional view illustrating a plasma display panel according to the present invention.

Here, the interval d2 between the Y electrode 34 and the Z electrode 34a, which is the sustain electrode, is approximately 100 µm or more, which is larger than the interval d1 according to the prior art.

According to the structure of the present invention, the sustain electrode is opposed to the Y electrode 34 and the X electrode 42 as the address electrode before the surface discharge starts between the Y electrode 34 and the Z electrode 43a in the sustain period. Discharge first occurs to form a sufficient amount of space charge.

This is because the surface discharge between the Y electrode 34 and the Z electrode 34a easily occurs to lower the discharge start voltage.

Usually, whether discharge starts or not has a correlation with the magnitude of the electric field (electrode voltage, distance between electrodes) between the electrode and the electrode, but also with the amount of space charge.

In the conventional three-electrode structure, when the distance between the Y electrode and the Z electrode is increased for the purpose of increasing the discharge efficiency, the discharge is not performed unless the voltage applied to the sustain electrode is increased. Therefore, when the interval between the sustain electrodes becomes more than a predetermined interval without increasing the voltage applied to the sustain electrodes, surface discharge between the sustain electrodes does not substantially occur, and long-pass discharge becomes impossible.

In the present invention, in addition to the size of the electric field, the discharge discharge is sufficiently generated by opposing discharge between the sustain electrode and the address electrode to enable long-pass discharge between the sustain electrodes without increasing the voltage applied to the sustain electrode, thereby increasing the discharge efficiency. It was made.

This will be described with reference to the waveform diagram shown in FIG. 4. For reference, FIG. 4 is a voltage waveform diagram of the Y electrode 34 and the Z electrode 34a as the sustain electrode and the X electrode 42 as the address electrode in the sustain period.

As shown in Figs. 3 and 4, a voltage is applied to the Y electrode 34, the Z electrode 34a, and the X electrode 42, which are the sustain electrodes maintained at the long-pass discharge interval d2. As a result, a relatively weak counter discharge occurs between the Z electrode 34a and the X electrode 42.

Therefore, priming particles are generated in the discharge space between the Z electrode 34a and the X electrode 42. Here, the priming particle is a space charge that can exhibit a priming effect among charged particles, and refers to a space charge that can lower the discharge start voltage applied to the sustain electrode before the surface discharge between the sustain electrodes is started.

As described above, when priming particles are generated through the opposite discharge between the sustain electrode and the address electrode, the long-pass high-efficiency surface discharge between the sustain electrodes can be started.

At this time, the presence of the priming particles generated by the opposite discharge with respect to the X electrode 42 in the Y electrode 34 lowers the voltage that must be applied between the sustain electrodes in order to start the long-pass surface discharge.

Therefore, the low voltage and high efficiency of the plasma display panel can be achieved by using the two-step discharge discharge mechanism.

As described above, the method of driving the plasma display panel of the present invention has the following effects.

In the case of the long-pass discharge, the discharge start voltage is reduced and the discharge efficiency is increased by generating a priming particle by first causing the opposite discharge between the sustain electrode and the address electrode before the surface discharge between the sustain electrodes.

In other words, even if the sustain voltage is not increased by the priming particles, discharge occurs more easily.

Claims (3)

In the driving method of a long-pass surface discharge plasma display panel having two sustain electrodes and an address electrode formed in a direction orthogonal to the sustain electrodes, Discharging in the sustain period and opposing discharge between the sustain electrode and the address electrode; And a surface discharge between the sustain electrodes is performed. The method of claim 1, wherein the opposite discharge between the sustain electrode and the address electrode generates priming particles to facilitate surface discharge between the sustain electrodes. The method of claim 1, wherein a distance between the two sustain electrodes is 100 µm or more.