KR100340439B1 - Electrode Structure in Plasma Display Panel - Google Patents

Abstract

The present invention relates to an electrode structure of a plasma display panel which can prevent the disconnection of electrodes and reduce power consumption.

The electrode structure of the plasma display panel of the present invention is characterized in that a plurality of holes are formed in the trigger electrode.

According to the present invention, the peripheral portion and the central portion of the trigger electrode can be formed differently to form the trigger electrode in a narrow width and to prevent disconnection.

Description

Electrode Structure in Plasma Display Panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode structure of a plasma display panel, and more particularly, to an electrode structure of a plasma display panel capable of preventing disconnection of electrodes and reducing power consumption.

Plasma Display Panel (hereinafter referred to as "PDP") is a display device using visible light generated from a phosphor when vacuum ultraviolet rays generated by gas discharge excite the phosphor. PDP is thinner and lighter than Cathode Ray Tube (CRT), which has been the mainstay of display means, and has the advantage of being able to realize high definition large screen. PDP is composed of a plurality of discharge cells arranged in a matrix form, one discharge cell constitutes a pixel of the screen.

1 is a perspective view showing a discharge cell structure of a conventional three-electrode AC surface discharge type PDP.

Referring to FIG. 1, a discharge cell of a conventional three-electrode AC surface discharge type PDP includes a scan / sustain electrode 12Y and a common sustain electrode 12Z formed on an upper substrate 10, and a lower substrate 18. The formed address electrode 20X is provided. The upper dielectric layer 14 and the passivation layer 16 are stacked on the upper substrate 10 having the scan / sustain electrode 12Y and the common sustain electrode 12Z side by side. In the upper dielectric layer 14, wall charges generated during plasma discharge are accumulated. The protective layer 16 prevents damage to the upper dielectric layer 14 due to sputtering generated during plasma discharge and increases emission efficiency of secondary electrons. As the protective film 16, magnesium oxide (MgO) is usually used. The lower dielectric layer 22 and the partition wall 24 are formed on the lower substrate 18 on which the address electrode 20X is formed, and the phosphor layer 26 is coated on the surfaces of the lower dielectric layer 22 and the partition wall 24. The address electrode 20X is formed in the direction crossing the scan / sustain electrode 12Y and the common sustain electrode 12Z. The partition wall 24 is formed in parallel with the address electrode 20X to prevent ultraviolet rays and visible light generated by the discharge from leaking to the adjacent discharge cells. The phosphor layer 26 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. Inert gas for gas discharge is injected into the discharge space provided between the upper substrate 10 / lower substrate 18 and the partition wall 24.

The AC surface discharge type PDP is driven by dividing one frame into several subfields having different discharge times in order to express gray level of an image. Each subfield is further divided into a reset period for uniformly causing discharge, an address period for selecting a discharge cell, and a sustain period for expressing gray scale according to the number of discharges. For example, when the image is to be displayed with 256 gray levels, the frame period (16.67 ms) corresponding to 1/60 second is divided into eight subfields. Each of the eight subfields is further divided into an address period and a sustain period. Here, the reset period and the address period of each subfield are the same for each subfield, while the sustain period is 2 ⁿ (n = 0,1,2,3,4,5,6,7) in each subfield. Is increased. In this way, since the sustain period is changed in each subfield, the gray level of the image can be expressed.

Here, in the reset period, a reset pulse is supplied to the scan / sustain electrode 12Y to generate a reset discharge. In the address period, scan pulses are supplied to the scan / sustain electrodes 12Y, and data pulses are supplied to the address electrodes 20X to generate address discharges between the two electrodes 12Y and 20X. During the address discharge, wall charges are formed in the upper and lower dielectric layers 14 and 22. In the sustain period, sustain discharge is generated between the two electrodes 12Y and 12Z by an alternating current signal alternately supplied to the scan / sustain electrode 12Y and the common sustain electrode 12Z.

However, in the conventional AC surface discharge PDP, the sustain discharge space is concentrated in the center of the upper substrate 10, thereby decreasing the utilization of the discharge space. Accordingly, there is a problem that the discharge area is reduced and the luminous efficiency is reduced. In order to solve this problem, a 5-electrode AC surface discharge type PDP as shown in FIG. 2 has been proposed.

2 is a perspective view showing a discharge cell structure of a conventional 5-electrode AC surface discharge type PDP.

Referring to FIG. 2, the conventional 5-electrode AC surface discharge type PDP is positioned at the edges of the discharge cells and the first and second trigger electrodes 34Y and 34Z formed on the upper substrate 30 to be positioned at the center of the discharge cells. The scan / sustain electrode 32Y and the common sustain electrode 32Z, the trigger electrodes 34Y and 34Z, the scan / sustain electrode 32Y and the common sustain electrode 32Z formed on the upper substrate 30 The address electrode 42X is formed in the center of the lower substrate 40 in the direction perpendicular to each other. The upper dielectric layer 36 and the protective film 38 are formed on the upper substrate 30 having the scan / sustain electrode 32Y, the first trigger electrode 34Y, the second trigger electrode 34Z, and the common sustain electrode 32Z side by side. This is laminated. The lower dielectric layer 44 and the barrier rib 46 are formed on the lower substrate 40 on which the address electrode 42X is formed, and the phosphor layer 48 is coated on the surfaces of the lower dielectric layer 44 and the barrier rib 46. The trigger electrodes 34Y and 34Z formed at a narrow interval Ni at the center of the discharge cell are used to start sustain discharge by receiving an AC pulse during the sustain period. The scan / sustain electrode 32Y and the common sustain electrode 32Z formed at a wide interval Wi at the edge of the discharge cell are supplied with an alternating pulse during the sustain period, and then discharge is started between the trigger electrodes 34Y and 34Z. Used to maintain.

3 shows the upper substrate rotated 90 degrees relative to the lower substrate to show all the electrode structures in one discharge cell.

The operation process will be described in detail with reference to FIG. 3 as follows.

In the conventional 5-electrode AC surface discharge type PDP, one frame is driven by dividing one frame into several subfields having different discharge times in order to express gray levels of an image. Each subfield is further divided into a reset period for uniformly generating discharge, an address period for selecting a discharge cell, and a sustain period for expressing gray scale according to the number of discharges. In the reset period, a reset pulse is supplied to the second trigger electrode 34Z of the discharge cell to generate reset discharge for initializing the discharge cell. In the address period, scan pulses are sequentially supplied to the first trigger electrode 34Y, and data pulses synchronized with the scan pulses are supplied to the address electrodes 42X. At this time, an address discharge occurs in the discharge cell supplied with data. In the sustain period, alternating pulses of different levels are alternately applied to the first and second trigger electrodes 34Y and 34Z, the scan / sustain electrodes 32Y, and the common sustain electrode 32Z. First, when a discharge is started between the first and second trigger electrodes 34Y and 34Z, two between the scan / sustain electrode 32Y and the common sustain electrode 32Z due to the priming effect of the charged particles generated at this time. Differential discharges are induced. Even if the distance Wi between the scan / sustain electrode 32Y and the common sustain electrode 32Z is large, the discharge can be performed even with sustain pulses having a relatively low voltage level due to the priming discharge between the first and second trigger electrodes 34Y and 34Z. It can be raised. By using this method, the discharge is primarily initiated using the trigger electrodes 34Y and 34Z formed at a narrow interval Ni, thereby suppressing the rise of the discharge start voltage, while the scan / sustain electrode 32Y and the common electrode are controlled by the priming effect. A long sustain discharge path may occur between the sustain electrodes 32Z. Thus, the amount of ultraviolet rays is increased, and the light emitting area is increased to improve the light emitting efficiency.

The conventional five-electrode PDP needs to minimize the unnecessary power consumption by applying a voltage as low as possible to the trigger electrodes 34Y and 34Z so as to increase the discharge efficiency without involving light emission. That is, the width direction widths of the trigger electrodes 34Y and 34Z should be as narrow as possible. However, since the trigger electrodes 34Y and 34Z are formed to have a straight shape as shown in FIG. 4, when the width direction widths of the trigger electrodes 34Y and 34Z are narrow, the trigger electrodes 34Y and 34Z may be disconnected. . Therefore, since the width in the width direction of the trigger electrodes 34Y and 34Z cannot be narrowed, a large amount of power is consumed when the PDP is driven, thereby lowering the luminous efficiency.

Accordingly, an object of the present invention relates to an electrode structure of a plasma display panel which can prevent the disconnection of electrodes and reduce power consumption.

1 is a perspective view showing a discharge cell structure of a conventional three-electrode AC surface discharge type plasma display panel.

2 is a perspective view showing a discharge cell structure of a conventional 5-electrode AC surface discharge type plasma display panel.

3 is a cross-sectional view of a five-electrode alternating surface discharge plasma display panel shown in FIG. 2;

4 is a view showing an electrode structure of the five-electrode alternating surface discharge plasma display panel shown in FIG.

5 is a view showing an electrode structure of an AC surface discharge plasma display panel according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10,30: Upper board

12Y, 32Y, 50Y: Scan / Sustain Electrode

12Z, 32Z, 50Z: common sustain electrode 14, 22, 36, 44: dielectric layer

16,38: protective film 18,40: lower substrate

20X, 42X, 66X: Address electrode 24, 46: bulkhead

26,48: phosphor layer 34Y, 34Z, 52Y, 52Z: trigger electrode

54: peripheral 56: central

58: hall

In order to achieve the above object, the electrode structure of the plasma display panel of the present invention is characterized in that a plurality of holes are formed in the trigger electrode.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIG. 5.

5 is a view showing an electrode structure of the present invention.

Referring to FIG. 5, the electrodes of the present invention are the scan / sustain electrode 50Y, the common sustain electrode 50Z formed parallel to the scan / sustain electrode 50Y by a predetermined interval, and the scan / sustain electrode ( 50Y) and the trigger electrodes 52Y and 52Z formed between the common sustain electrode 50Z and the scan / sustain electrode 50Y, the common sustain electrode 50Z, and the trigger electrodes 52Y and 52Z. It consists of an address electrode 66X formed in the direction shown. The scan / sustain electrode 50Y and the common sustain electrode 50Z cause sustain discharge in the sustain period. The first trigger electrode 52Y is supplied with the scan pulse in the address period, and the address electrode 66X is supplied with the data pulse synchronized with the scan pulse supplied to the first trigger electrode 52Y. At this time, address discharge occurs in the discharge cells to which the data pulses are supplied. In the sustain period, different levels of AC pulses are applied to the first and second trigger electrodes 52Y and 52Z, the scan / sustain electrode 50Y, and the common sustain electrode 50Z. First, when discharge is initiated between the first and second trigger electrodes 52Y and 52Z, secondary discharge is generated between the scan / sustain electrode 50Y and the common sustain electrode 50Z due to the priming effect of the charged particles generated at this time. Induced. In the present invention, the trigger electrodes 52Y and 52Z are narrowly formed to minimize the power consumed by the trigger electrodes 52Y and 52Z. To this end, the trigger electrodes 52Y and 52Z according to the present invention are composed of periphery portions 54 formed to have a long shape and center portions 56 formed in a rhombus shape between the periphery portions 54. . In addition, a plurality of holes 58 are formed between the peripheral portions 54. That is, the power consumed by the portion where the holes 58 are formed can be reduced. In addition, since the trigger electrodes 52Y and 52Z are formed of the peripheral parts 54 and the central parts 56, disconnection of the trigger electrodes 52Y and 52Z can be prevented. That is, even when the peripheral portion 54 is disconnected, the driving waveform is supplied by the central portion 56. In addition, even when the central portion 56 is disconnected, the driving waveform is supplied by the peripheral portion 54.

As described above, according to the electrode structure of the plasma display panel according to the present invention, the peripheral portion and the center portion of the trigger electrode may be formed differently to form the trigger electrode in a narrow width and to prevent disconnection.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (3)

A plasma display panel comprising a sustain electrode pair on an upper substrate, and at least one trigger electrode between the sustain electrode pairs. The electrode structure of the plasma display panel, characterized in that a plurality of holes are formed in the trigger electrode. The method of claim 1, The trigger electrode, First and second linear electrodes patterned in the form of straight lines, And a central electrode in which a rhombic pattern is regularly repeated between the first and second linear electrodes. The method of claim 1, The electrode structure of the plasma display panel, characterized in that the address electrode is formed on the lower substrate in the direction crossing the sustain electrode pair.