KR100762775B1 - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to suppress erroneous discharge and to improve picture quality by improving an arrangement structure of scan electrodes and an arrangement structure of sustain electrodes. A panel includes a plurality of scan electrodes(Y1-Ym+1) and a plurality of sustain electrodes(Z1-Zm+1) which are formed on an upper substrate. The panel includes a plurality of address electrodes(X1a-Xma,X1b-Xmb) which are formed across the scan electrodes and the sustain electrodes on a lower substrate facing the upper substrate. The panel includes an upper region and a lower region. Each of upper and lower regions includes two or more divided regions. At least, one of the address electrodes is separated between the upper and lower regions. Two opposing electrodes positioned between the upper and lower regions are the sustain electrodes.

Description

Plasma Display Panel

1 is a layout diagram of electrodes in a typical single scan method;

2 is a layout view of electrodes in a general dual scan method;

3 is a first embodiment of a discharge cell electrode structure according to the present invention;

Figure 4 is a second embodiment of the discharge cell electrode structure according to the present invention.

<Explanation of symbols on main parts of the drawings>

G1: partition area at the top of the panel, first group

G2: partition area under panel, second group

X: address electrode

Y: scan electrode

Z: sustain electrode

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel in which scan / sustain electrodes are arranged such that two opposite electrodes at the point where the scan ends in the dual scan method are sustain electrodes.

In general, a plasma display panel uses visible light of red (R), green (G), and blue (B) generated by vacuum ultraviolet rays (VUV) radiating from a plasma obtained through gas discharge to excite phosphors. The display device to implement a predetermined image.

In the plasma display panel, a discharge cell is selected as an opposite discharge between the scan electrode and the address electrode, and an image is realized by the surface discharge between the scan electrode and the sustain electrode.

The three-electrode AC surface-discharge plasma display panel is driven by dividing one frame into several subfields having different number of emission times in order to realize gradation of an image, and each subfield selects a reset period and a discharge cell for uniformly generating discharge. The driving period is divided into an address period and a sustain period for implementing gradation according to the number of discharges.

The plasma display panel driving method may be classified into a single scan and a dual scan method according to the scan method during the address period, which will be described with reference to FIGS. 1 and 2, respectively.

First, referring to FIG. 1, the address electrodes X1 to Xm are each formed as one line, and an address discharge is sequentially performed by applying driving signals sequentially from the first to the last of a plurality of scan lines in a horizontal direction (not shown). It is a single scan method. Such a single scan panel has a problem in that high-speed driving is difficult due to a long address period, and a sustain period is relatively reduced as the address period becomes longer, thereby degrading image display quality.

In order to compensate for this disadvantage, a dual scan method for driving by dividing the address electrode line up and down has been proposed, which will be described with reference to FIG. 2.

The dual scan method is divided into two groups G1 and G2 so that the address electrode lines X1 to Xm are separated from the upper region and the lower region of the panel, and the scan electrode Y and the sustain electrode are intersected with the address electrode lines. A line Z) is formed, and address discharge occurs as the driving voltage is sequentially supplied to the scan electrodes in the upper / lower region, so that the address period is reduced to 1/2 to ensure the sustain period is relatively long.

However, in this dual scan method, scanning occurs in the direction indicated by the arrow, so that scanning is terminated in the center area of the panel, which is the area between the divided upper and lower areas, and at the point where the scanning ends, the mth scan electrode Ym And the second m-th scan electrode Y ₂ m are arranged side by side.

In this case, crosstalk is performed between the neighboring mth scan electrode Ym and the _second mth scan electrode Y 2m due to a difference between a driving signal voltage difference supplied from a scan driver and a driving signal arrival time. Is generated, an unwanted discharge is generated between the Y electrodes, causing a decrease in image display quality.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object thereof is to provide crosstalk due to a difference in driving signals by arranging the electrodes such that two electrodes facing each other in the region where the scan ends are sustain electrodes. The present invention provides a plasma display panel which prevents unwanted false discharge during an address period.

The plasma display panel according to the present invention for solving the above problems is formed with a plurality of scan electrodes (Y) and sustain electrodes (Z) formed in a first direction, and in a second direction crossing the first direction, at least A plurality of address electrodes X are formed on two or more divided regions, and the two electrodes facing each other between the divided regions are sustain electrodes Z.

In this case, the plurality of divided regions are respectively divided into upper and lower regions of the panel, and the plurality of scan electrodes Y and the sustain electrodes Z on the upper / lower divided regions are formed in the order of Z / Y / Y / Z, Alternatively, the plurality of scan electrodes Y and the sustain electrodes Z on the upper partition are in the order of Y / Z / Y / Z, and the scan electrodes Y and the sustain electrodes Z on the lower partition are Z / Y / Z. It is formed in the order of / Y.

That is, the scan pulse is sequentially applied from the outside toward the center of the panel by a plurality of scan electrodes spread over each partition area during an address period on two partition areas divided into upper and lower parts of the panel. Since the electrode becomes the sustain electrode Z, after the final scan pulse is applied to the scan electrode, no erroneous discharge occurs between the divided regions.

In this case, the plurality of scan electrodes Y and the sustain electrodes Z on the upper and lower partitions may be formed in the order of Z / Y / Y / Z from the outside toward the center of the panel or in the order of Z / Y / Z / Y. Is formed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 3 is a first embodiment of a discharge cell electrode structure according to the present invention, Figure 4 is a second embodiment of the discharge cell electrode structure.

In each embodiment, the lower side is a plan view showing an electrode array, and the upper side is a cross-sectional view of two adjacent discharge cells C1 and C2 at the point where the application of the scan pulse is finished.

First, referring to FIGS. 3 and 4, the structure of the discharge cell is illustrated in which the upper substrate 21 faces the lower substrate 11, and a plurality of scan electrodes Y and sustain electrodes Z are formed on the upper substrate. . On the other hand, the lower substrate 11 is formed so that a plurality of address electrodes X intersect with the electrodes of the upper substrate.

The scan electrode Y and the sustain electrode Z are each composed of a transparent electrode 22 and a metal bus electrode 23 having a line width smaller than that of the transparent electrode.

The transparent electrode 22 is formed of indium tin oxide (Indium-Tin-Oxide: ITO), and the metal bus electrode 23 is formed of a metal such as chromium (Cr). It serves to reduce the voltage drop by 22).

In addition, an upper dielectric layer 24 and a passivation layer 25 are stacked on the upper substrate 21 to cover the scan electrode Y and the sustain electrode Z. Wall charges generated during plasma discharge are accumulated in the upper dielectric layer 24, and the protective layer 25 prevents damage to the upper dielectric layer 24 due to sputtering generated during plasma discharge and increases emission efficiency of secondary electrons. .

In addition, a lower dielectric layer 12 is formed on the lower substrate 11, and barrier ribs 13 are formed to prevent ultraviolet rays and visible light generated by discharge from leaking into adjacent discharge cells. The lower dielectric layer 12 and the barrier ribs are formed. The phosphor layer 14 is applied to the surface of (13). The phosphor layer 14 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue.

In the first embodiment of the plasma display panel configured as described above, as illustrated in FIG. 3, the scan electrode Y and the sustain electrode Z are arranged in the order of Z / Y / Y / Z. As illustrated in FIG. 4, the array is arranged in Z / Y / Z / Y order.

The plurality of address electrodes X1a to Xma and X1b to Xmb are divided into a first group G1 belonging to the upper region of the panel and a second group G2 belonging to the lower region of the panel. The address electrodes of each group are intersected with the scan electrodes Y and the sustain electrodes Z in the horizontal direction, and the scan electrodes Y1 to Ym and the sustain electrodes crossing the address electrodes X1a to Xma of the first group. Z1 to Zm are the first to mth electrodes, and the scan electrodes Ym + 1 to Y ₂ m and the sustain electrodes Zm + 1 to Z ₂ m that cross the second group of address electrodes X1b to Xmb. ) Is an electrode from m + 1 to 2m.

Further, the plurality of scan electrodes Y1 to Y ₂ m are connected to a scan driver not shown, the scan driver supplies a reset signal set up and set down during a reset period, and each scan electrode Y1 to Y ₂ m) scan pulses are sequentially supplied, and sustain pulses with high and low potentials are repeated during the sustain period.

On the other hand, the plurality of sustain electrodes Z1 to Z ₂ m are connected to a sustain driver (not shown), and the sustain driver is configured to commonly transmit signals to the plurality of sustain electrodes Z connected during the reset period, the address period, and the sustain period. Is authorized.

Accordingly, in the dual scan method, the scan driver applies the scan pulse in the direction of the arrow shown in FIGS. 3 and 4 (ie, in the direction from the outside toward the center of the panel) during the address period. Y1 is the first scan pulse to belong to, and Y2, Y3 .... applying a scan pulse to Ym in order, and applying a second scan pulse to the first group belonging to Ym ₊₁ (G2), and Ym _+2, Ym _{+3 ....} Apply scan pulses in the order of Y ₂ m.

Also, a first address driver connected to the address electrodes X1a to Xma belonging to the first group and a second address driver connected to the address electrodes X1b to Xmb belonging to the second group may be connected to the scan pulse during an address period. Apply a synchronized data pulse.

In this case, the electrodes facing each other in the first group G1 and the second group G2 in the region where the scan is completed (center of the panel) are sustain electrodes Zm and Z ₂ m as shown in FIGS. 3 and 4. A plurality of scan electrodes and a sustain electrode are arranged to be ().

Accordingly, as shown in FIG. 3, the Z electrode is disposed in the uppermost region of the first group G1, and then the Z electrode is disposed in the lowest region of the first group as the Y electrode is arranged in the order of Y / Y / Z. In addition, the Z electrode is disposed in the lowermost region of the second group G2, and then arranged in the order of Y / Y / Z, so that the Z electrode is disposed in the uppermost region of the second group. That is, the second electrode opposing the center of the central region between the first and second groups are sustain electrodes (Zm, Z _2, m).

Similarly, as shown in FIG. 4, the Y electrode is disposed in the uppermost region of the first group G1, and then the Z electrode is disposed in the lowest region of the first group as the Z electrodes are arranged in the order of Z / Y / Z. In addition, the Y electrode is disposed in the lowermost region of the second group G2, and the Z electrode is disposed in the uppermost region of the second group as the uppermost regions of the second group G2 are arranged in the order of Z / Y / Z. That is, the second electrode opposing the center of the central region between the first and second groups are sustain electrodes (Zm, Z _2, m).

In this way, as a plurality of electrodes formed on the upper plate are arranged so that the electrode at the end of scanning in each group becomes a sustain electrode, the same signal is simultaneously applied from the sustain driver to the plurality of sustain electrodes connected in common to discharge cells. No crosstalk occurs, reducing the risk of mis-discharge.

As described above, the plasma display panel according to the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed herein, and those skilled in the art within the scope of the technical idea of the present invention are protected. Application is possible.

In the plasma display panel according to the present invention, the scan electrode and the sustain electrode are arranged such that the scan is terminated at the sustain electrode, so that a voltage difference due to a signal commonly applied to the sustain electrode is not generated. There is no effect, and the image quality is improved.

Claims (6)

A plurality of scan electrodes Y and sustain electrodes Z formed on the upper substrate; A plurality of address electrodes formed on the lower substrate facing the upper substrate and intersecting the scan electrode Y and the sustain electrode Z; The panel includes an upper region and a lower region divided into at least two regions in the vertical direction, and at least one of the plurality of address electrodes is separated between the upper region and the lower region, And the two electrodes most closely facing each other between the upper region and the lower region are sustain electrodes (Z). In claim 1, And a plurality of scan electrodes (Y) and sustain electrodes (Z) disposed on the upper region or the lower region, respectively, in the order Z / Y / Y / Z. In claim 1, The plurality of scan electrodes Y and the sustain electrodes Z on the upper region are formed in the order of Y / Z / Y / Z, And a plurality of scan electrodes (Y) and sustain electrodes (Z) on the lower region are formed in the order of Z / Y / Z / Y. A plurality of scan electrodes Y and sustain electrodes Z formed on the upper substrate; A plurality of address electrodes formed on the lower substrate facing the upper substrate and intersecting the scan electrode Y and the sustain electrode Z; The plurality of address electrodes are formed on a panel area divided into upper and lower parts, Scan pulses are sequentially applied from the outside toward the center of the panel with a plurality of scan electrodes formed on each of the divided panel regions during the address period, and the two electrodes closest to each other between the divided panel regions are the sustain electrodes Z. Plasma display panel, characterized in that. In claim 4, And a plurality of scan electrodes (Y) and sustain electrodes (Z) formed on each divided panel region in a Z / Y / Y / Z order from the outside toward the center of the panel. In claim 4, And a plurality of scan electrodes (Y) and sustain electrodes (Z) formed on each of the divided panel regions in a Z / Y / Z / Y order from the outside toward the center of the panel.

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