KR20020001181A - Plasma Display Panel With electrode of Ladder Pattern Form - Google Patents

Abstract

PURPOSE: A PDP having trapezoidal pattern type electrodes is provided to be capable of enlarging light emission area as well as minimizing consumption power. CONSTITUTION: First and second trigger electrodes(34Y,34Z) are formed in the center of a discharge cell. Scan/sustain electrodes(50Y) and common sustain electrodes(50Z) are positioned on edge of the discharge cell to be parallel to the trigger electrodes(34Y,34Z). Address electrodes(42X) are formed to be crossed with the trigger electrodes(34Y,34Z). The widths of the scan/sustain electrodes(50Y) and common sustain electrodes(50Z) are 200-300 micrometer, and the distance between the scan/sustain electrodes(50Y) and common sustain electrodes(50Z) is 400-500 micrometer. In addition, a plurality of holes(52) are formed on the scan/sustain electrodes(50Y) and common sustain electrodes(50Z) to widen the widths of the electrodes(50Y,50Z) for maximizing discharge area.

Description

Plasma display panel with electrodes of ladder pattern form {Plasma Display Panel With electrode of Ladder Pattern Form}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel having a ladder pattern type electrode, and more particularly, to a plasma display panel having a ladder pattern type electrode capable of widening a light emitting area and minimizing 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.

4 is a view showing in detail the structure of the electrodes shown in FIG.

Referring to FIG. 4, the widths W _Y and W _{Z of the} conventional scan / sustain electrode 32Y and the common sustain electrode 32Z are formed to be approximately 100 μm. Further, the scan / sustain electrode 32Y and the common sustain electrode 32Z are formed at intervals W _YZ of approximately 600 mu m. In order to maximize the light emitting area of the PDP having such an electrode structure, the widths of the scan / sustain electrode 32Y and the common sustain electrode 32Z must be widened in the width direction.

However, when the widths of the scan / sustain electrode 32Y and the common sustain electrode 32Z are widened, a lot of power consumption is consumed and the discharge efficiency is lowered. That is, when the widths of the scan / sustain electrode 32Y and the common sustain electrode 32Z are set to a predetermined value or more, the power consumption by the electrode width becomes larger than the power consumed for discharge.

Accordingly, an object of the present invention is to provide a plasma display panel having electrodes in the form of a ladder pattern to increase the light emitting area and to minimize 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 a five-electrode AC surface discharge type plasma display panel according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10,30: upper substrate 12Y, 32Y, 50Y: scan / sustain electrode

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

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

20X, 42X: address electrode 24, 46: partition wall

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

52: hall

In order to achieve the above object, the plasma display panel having the ladder pattern type electrode of the present invention is characterized in that a plurality of holes are formed in the sustain electrode pair.

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.

In the drawings used for description, the same components will be given the same reference numerals and redundant description thereof will be omitted.

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

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

Referring to FIG. 5, the electrodes according to the exemplary embodiment of the present invention may include first and second trigger electrodes 34Y and 34Z, first and second trigger electrodes 34Y and 34Z, which are formed to be positioned at the center of the discharge cell. The scan / sustain electrode 50Y and the common sustain electrode 50Z formed side by side and positioned at the edge of the discharge cell and the address electrode formed in a direction orthogonal to the first and second trigger electrodes 34Y and 34Z are formed. It consists of 42X. In the present invention, the widths W _Y and W _Z of the scan / sustain electrode 50Y and the common sustain electrode 50Z are formed to be 200 to 300 μm. Further, the interval W _YZ between the scan / sustain electrode 50Y and the common sustain electrode 50Z is formed to be 400 to 500 mu m.

In contrast with the conventional, in the present invention, the width of the scan / sustain electrode 50Y and the common sustain electrode 50Z is 100 to 200 μm wider than that of the conventional art. In addition, the interval between the scan / sustain electrode 50Y and the common sustain electrode 50Z is formed to be 100 to 200 탆 narrower than in the prior art. That is, in the present invention, the width of the scan / sustain electrode 50Y and the common sustain electrode 50Z can be widened to maximize the discharge area. To this end, a plurality of holes 52 are formed on the scan / sustain electrode 50Y and the common sustain electrode 50Z. Therefore, the power consumption is reduced by the number and size of the holes 52 formed on the scan / sustain electrode 50Y and the common sustain electrode 50Z. In addition, the widths of the ends W _Y1 and W _Z1 are formed in the same manner as in the prior art so that the scan / sustain electrode 50Y and the common sustain electrode 50Z can be connected to the respective driving units without changing the structure.

As described above, according to the plasma display panel having the ladder pattern electrode according to the present invention, the light emitting efficiency can be improved by increasing the discharge area by forming the width of the scan / sustain electrode and the common sustain electrode to a predetermined value or more. In addition, power consumption may be minimized by forming a plurality of holes in the scan / sustain electrode and the common sustain electrode.

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 (5)

A plasma display panel comprising a sustain electrode pair on an upper substrate, and a trigger electrode between the sustain electrode pairs. And a plurality of holes are formed in the sustain electrode pairs. The method of claim 1, The plasma display panel having a ladder pattern electrode, characterized in that the width direction of the sustain electrode pair is formed from 200 to 300㎛. The method of claim 1, And a spacing between the sustain electrode pairs is 400 to 500 µm. The method of claim 1, A plasma display panel having a ladder pattern electrode, wherein an address electrode is formed on a lower substrate in a direction crossing the sustain electrode pair. The method of claim 2, An end of the sustain electrode pair is formed to be narrower than the width direction of the sustain electrode pair plasma display panel having a ladder pattern type electrode.