KR100722263B1 - Plasma Display Panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel comprising: a back substrate having a plurality of address electrodes and partition walls; and a front substrate facing the back substrate and having a plurality of scan electrodes and sustain electrodes formed thereon. The scan auxiliary electrode and the sustain auxiliary electrode are formed between the scan electrode and the sustain electrode, and the scan auxiliary electrode and the sustain auxiliary electrode are alternately protruded from the scan electrode and the sustain electrode toward the counter electrode. The initial discharge voltage of the display panel is lowered, the time jitter characteristic of electrons being released during plasma discharge is lowered, the number of discharges is improved, and the discharge efficiency is increased by smoothly discharging the discharge from the discharge area, thereby increasing the luminance in the discharge cell. effect There is.

Plasma Display Panel, Transparent Electrode, Scan Electrode, Sustain Electrode

Description

Plasma Display Panel

1 is a perspective view showing the configuration of a plasma display panel according to the present invention;

2A is an exemplary view showing a first embodiment of a plasma display panel according to the present invention;

2B is an exemplary view showing a second embodiment of a plasma display panel according to the present invention;

3A is a plan view showing a first embodiment of a plasma display panel according to the present invention;

3B is a plan view showing a second embodiment of the plasma display panel according to the present invention.

<Explanation of symbols on main parts of the drawings>

10: front substrate 11: scanning electrode

11a: scan auxiliary electrode 12: sustain electrode

12b: sustain auxiliary electrode 13: first dielectric layer

14: dielectric protective layer 20: back substrate

21 address electrode 22 second dielectric layer

23: partition 24: phosphor

V: discharge cell

The present invention relates to a plasma display panel, in particular a scan auxiliary electrode / sustain auxiliary electrode is formed between the scan electrode / sustain electrode, and each of the formed auxiliary electrodes alternates from the scan electrode and the sustain electrode toward the counter electrode. It relates to a plasma display panel to protrude.

In general, a plasma display panel (hereinafter referred to as a PDP) is formed of red (R), green (G) and blue (B) generated by excitation of a phosphor by vacuum ultraviolet (VUV) radiation emitted from a plasma obtained through gas discharge. A display device that implements a predetermined image using visible light.

Such a PDP can realize an ultra-large screen of 60 inches or more with a thickness of only 10 cm or less, and since it is a self-luminous display device such as a CRT, it has no characteristic of distortion due to color reproducibility and viewing angle. As a result, it is gaining attention as a TV and industrial flat panel display that have strengths in terms of productivity and cost.

In the surface discharge type PDP, which is widely adopted at present, the scan electrode, the sustain electrode, and the address electrode interact with each other to generate a plasma discharge in the discharge cell, thereby realizing a screen.

The plasma display panel is a gas discharge display device using a light emitting phenomenon in which vacuum ultraviolet rays generated when an inert gas is discharged between two glass substrates facing each other excite the phosphor.

In addition, the plasma display panel includes a front substrate and a rear substrate facing each other, and a scan electrode, a sustain electrode, and a dielectric layer are formed on the front substrate.

The rear substrate includes a plurality of address electrodes for dividing the entire screen into a plurality of cells together with the scan electrode and the sustain electrode, a dielectric layer for protecting the address electrode and performing electrode insulation, a partition wall forming a discharge cell; It is made of a phosphor that is printed and coated inside the discharge cells formed by the barrier ribs and is excited by ultraviolet rays during the discharge of each cell to emit visible light.

In addition, the plasma display panel is formed with a transparent electrode connected to each scan electrode and the sustain electrode formed on the front substrate, wherein the transparent electrode has a predetermined gap (GAP) inside the discharge cell, and the address electrode The discharge generates a plasma, and the ultraviolet rays emitted from the plasma excite the phosphor and emit light.

As voltage is applied to any one of the address electrode and the scan electrode and the sustain electrode, an address discharge is generated between them, and charged particles are formed on the lower surface of the dielectric layer of the front substrate to generate sustain discharge. It is made between the transparent electrodes of the scan electrode and the sustain electrode having a gap (GAP) of.

In the conventional plasma display panel, in order for the discharge started from the predetermined gap GAP to spread effectively to the entire discharge cell, the discharge should be initiated over a wide area, and the predetermined gap GAP is formed at regular intervals. In this case, there is a problem that the start of discharge occurs locally and the spread of discharge is not smoothly performed.

That is, since a uniform discharge area is not formed over the entire surface of the transparent electrodes when a discharge is generated by applying a voltage to the scan electrodes and the sustain electrodes, which are discharge sustaining electrodes, unnecessary portions that contribute less to the discharge of the transparent electrodes are not formed. With this increase, this portion not only lowers the discharge efficiency in the discharge cell but also covers a substantial part of the discharge cell, thereby reducing the luminance.

The present invention has been made to solve the above problems of the prior art, the object of which is a transparent electrode which is a scan auxiliary electrode / sustain auxiliary electrode is formed on the front substrate of the plasma display panel, each formed transparent electrode is By protruding alternately from the scan electrode / sustain electrode toward the counter electrode, the discharge efficiency is improved during the plasma discharge, the brightness of the panel is increased to provide a plasma display panel.

The plasma display panel according to the present invention for solving the above problems comprises a back substrate having a plurality of address electrodes and partition walls, and a front substrate facing the back substrate and having a plurality of scan electrodes and sustain electrodes formed thereon. In the plasma display panel, a scan auxiliary electrode and a sustain auxiliary electrode are formed between the scan electrode and the sustain electrode, and the scan auxiliary electrode and the sustain auxiliary electrode are alternately protruded from the scan electrode and the sustain electrode toward the counter electrode. It is characterized by being formed.

In addition, the scan auxiliary electrode / sustain auxiliary electrode of one discharge cell and the scan auxiliary electrode / sustain auxiliary electrode of a neighboring discharge cell are each electrically connected.

The scan auxiliary electrode / sustain auxiliary electrode may be formed in a U shape or a Y shape from the scan electrode / sustain electrode.

In this case, the address electrode is formed on the rear substrate such that some or all of the address electrodes overlap with the scan auxiliary electrode.

In addition, the scan auxiliary electrode / sustain auxiliary electrode is formed to be parallel to the address electrode, wherein a part of the scan auxiliary electrode / sustain auxiliary electrode protrudes toward the scan auxiliary electrode.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view showing the configuration of a plasma display panel according to the present invention. The scan electrode and the sustain electrode of the plasma display panel should be arranged in units of discharge cells, but only one scan electrode and one sustain electrode are shown for convenience.

As shown in FIG. 1, the plasma display panel according to the present invention includes a front substrate 10 and a rear substrate 20.

In this case, a scan electrode 11 and a sustain electrode 12 are formed on the front substrate 10, and a first dielectric layer 13 is preferably stacked adjacent to the scan electrode 11 and the sustain electrode 12. Do. In addition, a dielectric protective layer 14 may be included to protect the first dielectric layer 13.

In addition, the back substrate 20 is provided with an address electrode 21 and a second dielectric layer 22 facing the scan electrode 11 and the sustain electrode 12 formed on the front substrate 10.

In addition, a partition 23 partitioning the discharge cell, and a phosphor 24 that is excited by ultraviolet rays at the time of discharge and emits visible light are coated inside the discharge cell.

In addition, the plasma display panel configured as described above applies a voltage having opposite polarity to the scan electrode 11, the sustain electrode 12, and the address electrode 21 to select a cell in which discharge is to be generated, and the scan electrode ( 11) and the sustain electrode 12 alternately apply a voltage to generate a discharge.

Therefore, when a vacuum ultraviolet ray (VUV) is generated by the discharge, the vacuum ultraviolet ray (VUV) excites / lights up the phosphor 24 coated in the discharge space to generate visible light, thereby providing the user with an image through the screen. Will be shown.

In addition, the plasma display panel includes a scan auxiliary electrode 11a and a sustain auxiliary electrode 12a connected to the scan electrode 11 and the sustain electrode 12, respectively, on the front substrate 10.

In this case, the scan auxiliary electrode 11a and the sustain auxiliary electrode 12a formed on the front substrate 10 form a predetermined gap GAP, and the formed gap GAP becomes a discharge path, so that the address electrode When a voltage is applied to the reference numeral 21 and the scan auxiliary electrode 11a and the sustain auxiliary electrode 12a, a discharge is generated from the gap GAP.

FIG. 2A is an exemplary view showing a first embodiment of a plasma display panel according to the present invention, and FIG. 2B is an exemplary view showing a second embodiment of a plasma display panel according to the present invention. The partition walls forming the discharge cells of the plasma display panel may be formed in a stripe shape, a lattice shape, a honeycomb shape, and the like. However, the scan auxiliary electrode and the sustain auxiliary electrode of the plasma display panel may be formed regardless of the partition wall partitioning the discharge cells. Since they are formed in the same manner, the partition wall shape will be described in the present specification.

As shown in FIG. 2A, the scan electrode 11 and the sustain electrode 12 are formed on the front substrate 10 in parallel with each other. In this case, the scan electrode 11 and the sustain electrode 12 are formed. In this connection, the scan auxiliary electrode 11a and the sustain auxiliary electrode 12a are formed.

The scan auxiliary electrode 11a and the sustain auxiliary electrode 12a are alternately protruded from the scan electrode 11 and the sustain electrode 12 toward the counter electrode, and the scan auxiliary electrode 11a and the sustain electrode 12a are sustained. The auxiliary electrode 12a is formed at a position opposite to the inside of the discharge cell v of the back substrate 20 to cause discharge with the address electrode 21.

In this case, the address electrode 21 is positioned inside the discharge cell of the back substrate 20 and faces the scan auxiliary electrode 11a among the scan auxiliary electrode 11a and the sustain auxiliary electrode 12a. It is formed in parallel on the back substrate 20 so that some or all of them overlap in position.

In addition, the scan auxiliary electrode 11a / sustain auxiliary electrode 12a of one discharge cell v and the scan auxiliary electrode 11a / sustain auxiliary electrode 12a of the neighboring discharge cell v are electrically connected to each other. In this case, the scan auxiliary electrode 11a / sustain auxiliary electrode 12a of each discharge cell is connected in a U-shape in which each hole is formed.

In this case, the scan auxiliary electrode 11a / sustain auxiliary electrode 12a is formed such that the hole portion is opposed to the partition wall 23 of the rear substrate 20 when the U-shaped shape of the hole (not shown) is formed. do.

As shown in FIG. 2B, the scan auxiliary electrode 11a / sustain auxiliary electrode 12a alternately protrudes from the scan electrode and the sustain electrode toward the counter electrode to have a Y shape.

As shown in the second embodiment, since the scan auxiliary electrode 11a / sustain auxiliary electrode 12a is formed to protrude toward the center of the discharge cell v in a Y-shape, the address electrode 21 has the rear surface. It is formed in the center of the discharge cell (v) of the substrate 20.

In addition, the scan auxiliary electrode 11a / sustain auxiliary electrode 12a is formed at a position in which the hole portion is opposed to the partition wall 23 of the back substrate 20 when the Y-shaped hole is formed at the center thereof. .

Meanwhile, when the scan auxiliary electrode 11a / sustain auxiliary electrode 12a is formed in a U shape or a Y shape as shown in FIGS. 2A to 2B, the scan auxiliary electrode 11a / sustain auxiliary electrode 12a is formed to protrude to each counter electrode. The gap GAP of is formed so that the gap GAP formed during the plasma discharge of the panel becomes a discharge path, and plasma discharge occurs according to the gap GAP.

If the scan auxiliary electrode 11a / sustain auxiliary electrode 12a is formed in a U shape as in the first embodiment, the gaps between the auxiliary electrodes are formed in a straight line shape. When the scan auxiliary electrode 11a / sustain auxiliary electrode 12a is formed in a Y shape as in an exemplary embodiment, a gap shape between the auxiliary electrodes is formed in a parallelogram shape to form each auxiliary electrode. Discharge occurs in the gap between them.

3A is a plan view showing a first embodiment of a plasma display panel according to the present invention, and FIG. 3B is a plan view showing a second embodiment of a plasma display panel according to the present invention. 3A illustrates a case where the scan auxiliary electrode / sustain auxiliary electrode is formed in a U shape, and FIG. 3B is formed in a Y shape.

As shown in FIG. 3A, the scan auxiliary electrodes 11a and the sustain auxiliary electrodes 12a which are connected to the scan electrodes 11 and the sustain electrodes 12 protrude alternately toward each counter electrode. At this time, the length (b) of the scan auxiliary electrode (11a) / sustain auxiliary electrode 12a is preferably formed to protrude approximately 80% from the total length (a) of the discharge cell (v).

For example, when the total width length a of the discharge cells v of the back substrate 20 is 456 μm, the length b of the scan auxiliary electrode 11a / sustain electrode 12a is the discharge cell v. ) 366 ㎛ within 80% of the total width length.

In addition, the horizontal width s and the vertical width s' of the scan auxiliary electrode 11a / sustain auxiliary electrode 12b are formed within 60 μm, and each of the auxiliary electrodes protrudes toward the counter electrode. It is preferable that the width of the discharge path P is formed to be 65 µm to 70 µm.

As shown in FIG. 3B, the scan auxiliary electrode 11a / sustain auxiliary electrode 12a alternately protrudes toward each counter electrode, wherein the length of the scan auxiliary electrode 11a / sustain auxiliary electrode 12a is alternated. (d) is preferably formed to protrude from 70% to 80 of the length (C) of the discharge cell (v).

At this time, when protruding toward the counter electrode, a length of approximately 45% of the length of the scan auxiliary electrode 11a / sustain auxiliary electrode 12a from the protruding end side is within the discharge cell of the rear substrate 20. It is further protruded toward the center side, and is formed at a position opposite to the address electrode 21 so that a part of the address electrode 21 formed on the rear substrate 20 overlaps.

In addition, the electrode part is formed at a position opposite to the partition wall 23 so as to overlap a part of the partition wall 23 of the rear substrate 20 in addition to the part protruding to the inner side of the discharge cell.

For example, when the total width of the discharge cell v is 460 μm, each auxiliary electrode protrudes in the direction of each counter electrode with a length of about 365 μm, and at this time, 160 from the end side of each protruding auxiliary electrode. A length of about μm is formed to protrude toward the inner side of the discharge cell v, and the electrode length of the portion is formed on the front substrate 10 so that a portion of the electrode 23 overlaps with the partition 23.

In this case, the address electrode 21 of the rear substrate 20 is the length of the scan auxiliary electrode 11a / sustain auxiliary electrode 12a that protrudes from the scan auxiliary electrode 11a toward the center of the discharge cell v. The address electrode 21 protrudes so that the protruding portion of the scan auxiliary electrode 11a and the protruding portion H of the address electrode 21 overlap each other.

In addition, the width S1 and the height S2 of the scan auxiliary electrode 11a / sustain auxiliary electrode 12b are formed within 60 μm to 70 μm, and each of the auxiliary electrodes protrudes toward the counter electrode. The width of the discharge path P to be formed is preferably formed to be approximately 70 μm.

In the plasma display panel configured as described above, the scan auxiliary electrode 11a / sustain auxiliary electrode 12a connected to the scan electrode 11 and the sustain electrode 12 alternately protrude toward the counter electrode, and thus each of the auxiliary electrodes Since the discharge is generated through the gap GAP formed therebetween, it is possible to reduce the initial discharge voltage and generate a high efficiency discharge.

As described above, the plasma display panel according to the present invention has been described with reference to the illustrated drawings. Application is possible.

In the plasma display panel according to the present invention configured as described above, as the scan auxiliary electrode / sustain auxiliary electrode is formed, discharge occurs through a gap (GAP) between the auxiliary electrode / sustain auxiliary electrode, thereby initializing the plasma display panel. The discharge voltage is lowered, the time jitter characteristic of electrons being released during plasma discharge is lowered and the number of discharges is improved, and the discharge is smoothly diffused from the discharge region, so that the brightness in the discharge cell is improved as the discharge efficiency is increased. .

Claims (12)

A back substrate having a plurality of address electrodes and partition walls, A front substrate facing the rear substrate and having a plurality of scan electrodes and a sustain electrode formed thereon; A scan auxiliary electrode and a sustain auxiliary electrode are formed between the scan electrode and the sustain electrode and are formed to extend from the scan electrode and the sustain electrode. Alternately projected toward And a scan auxiliary electrode / sustain auxiliary electrode of one discharge cell and a scan auxiliary electrode / sustain auxiliary electrode of a neighboring discharge cell are electrically connected to each other. delete The method according to claim 1, And the scan auxiliary electrode / sustain auxiliary electrode is a transparent electrode. The method according to claim 1, And the address electrode is formed on the rear substrate such that some or all of the address electrodes overlap each other at positions opposite to the scan auxiliary electrodes. The method according to claim 1, And the scan auxiliary electrode / sustain auxiliary electrode is U-shaped from the scan electrode / sustain electrode. The method according to claim 1, And the scan auxiliary electrode / sustain auxiliary electrode is formed parallel to the address electrode. The method according to claim 5, And the scan auxiliary electrode / sustain auxiliary electrode is formed to protrude by 80% or less from a gap between the scan electrode and the sustain electrode. The method according to claim 5, And a gap between the scan auxiliary electrode and the sustain auxiliary electrode in a discharge cell is in the range of 65 µm to 70 µm. The method according to claim 1, And the scan auxiliary electrode / sustain auxiliary electrode is Y-shaped from the scan electrode / sustain electrode. The method according to claim 9, And the scan auxiliary electrode / sustain auxiliary electrode protrudes from the gap between the scan electrode and the sustain electrode to a length within 70% to 80%. The method according to claim 9, And a width of the scan auxiliary electrode / sustain auxiliary electrode is within 60 μm to 70 μm. The method according to claim 9, And the address electrode is formed to protrude toward the scan auxiliary electrode.

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