KR19990075037A - Structure of Plasma Display Panel and Driving Method - Google Patents

Abstract

According to the present invention, the write discharge is generated between the electrode located on the bottom surface of the panel and the electrode located on the partition wall, and the sustain discharge is generated between the plurality of electrodes located on the front surface of the panel so that the contrast and emission luminance of the screen can be improved. It relates to the structure of the panel and its driving method.

According to the present invention, in the structure of a pixel of a matrix display panel composed of a plurality of pixels each having a memory function, partition walls are formed in a multi-stage shape to generate a memory function by separating a plurality of discharge spaces from each pixel. .

Description

Structure of Plasma Display Panel and Driving Method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a plasma display panel and a driving method thereof. In particular, a write discharge occurs between an electrode disposed on a bottom surface of a panel and an electrode disposed on a partition wall, and a sustain discharge occurs between a plurality of electrodes disposed on a front surface of the panel. The present invention relates to a structure of a plasma display panel and a driving method thereof in which the contrast and light emission luminance of a screen are improved.

As is well known, the importance of an image display medium, that is, an image display device, is becoming more important in the process of partially completing the development of a high resolution television and continuing improvement studies thereof.

The research subjects include a color cathode ray plate, a liquid crystal display panel, an electroluminescent flat panel display device, a fluorescent display tube, and a plasma display panel, which are expected to retain their position as main display devices for a considerable period of time.

However, since it is not technically completed as a display element that can be satisfied with the development of high-definition television, it is being developed while maintaining the complementary relationship at different positions.

As described above, in a display device or the like, the plasma display panel is suitable for displaying a large area image and is gradually emerging as the most promising display element in this field. This is because it has a roughness ratio.

As shown in FIGS. 1 and 2, the structure of the conventional plasma display panel having such characteristics is located in parallel with the front substrate 1, which is the display surface of the image, and a predetermined distance from the front substrate 1. A rear substrate 4, partition walls 6 formed between the front substrate 1 and the rear substrate 4 to form a display discharge cell 7 and an auxiliary discharge cell 8, and the front substrate ( 1) a plurality of cathodes 5 arranged on the opposite surface of the rear substrate 4 so as to be orthogonal to the partition wall 6, and formed on the rear substrate 4 in parallel with the partition wall 6 so as to form the plurality of cathodes (5) together with a plurality of display anodes 2 causing a discharge in the display discharge cell 7 and the display anodes 2 on the back substrate 4 in parallel in parallel with the partition wall 6 A plurality of auxiliary anodes (3) formed together with the plurality of cathodes (5) to cause discharge in the auxiliary discharge cells (8) And a plurality of priming passages 9 formed between the partition 6 and the rear substrate 4 to allow the auxiliary discharge generated in the auxiliary discharge cell 8 to flow into the display discharge cell 7. .

An operation of a conventional plasma display panel configured as described above will be described with reference to FIGS. 1 to 3.

First, a driving pulse for driving a pulse memory system is shown in FIG. 3.

As shown in this figure, a sustain pulse is always applied to the plurality of cathodes 4, and Vk having a negative potential is applied to the plurality of cathodes 4 sequentially from the negative electrode K1, and the fixed amount is positive. The potential Va of is applied to each auxiliary anode 3.

On the other hand, the auxiliary discharge is always scanned in the auxiliary discharge cell 8 and at this time, the voltage of Va-Vk is set higher than the ignition voltage of the auxiliary discharge cell 8 and in the auxiliary discharge cell 8. Discharge occurs every time a scan pulse is applied.

These discharges continuously move to adjacent auxiliary discharge cells, and these charged particles diffuse through the priming passage 9 to the display discharge cells 7 adjacent to the auxiliary discharge cells 8, thereby causing the display discharge cells 7 to be discharged. This will reduce the delayed time on ignition at.

On the other hand, in the pulse discharge, for example, the write pulse applied to the display anode 2 while the scan pulse is applied to the plurality of cathodes 5 is assisted by an auxiliary priming discharge for igniting the display discharge.

This write pulse lowers the discharge voltage in the display discharge cell 7 so that the once addressed cell continues to discharge only by excitation of the sustain pulse.

However, such a conventional plasma display panel is a display enclosed by a barrier when a plasma display panel is designed with a cell pitch of about 300 μm to implement a plasma display panel used as a high resolution television or computer display device. Due to the discharge cells, the transmittance of visible light is lowered, the light emitting area of the phosphor is reduced, and the discharge space is insufficient, resulting in unstable discharge.

In addition, regardless of whether the discharge cell is discharged or not, the secondary discharge cell continuously generates secondary discharge by a scan pulse applied sequentially to the cathode, thereby providing a large amount of current capacity to the device of the driving circuit connected to the cathode. This results in a large number of constraints on the design of the circuit driving the cathode, and the composition of the auxiliary anode in addition to the cathode and the display anode, and the auxiliary discharge space separately, so that the overall structure is very complicated. There was an uncomfortable problem with the difficulty.

Therefore, the present invention has been proposed to solve the above-described problems of the prior art, and the write discharge occurs between the electrode located on the bottom surface of the panel and the electrode located on the partition wall, and the sustain discharge occurs between the plurality of electrodes located on the front surface of the panel. It is an object of the present invention to provide a structure of a plasma display panel and a method of driving the same so that the contrast and light emission luminance of a screen can be improved.

In the plasma display display panel of the present invention for achieving the above object, in the structure of the pixel of the matrix display panel composed of a plurality of pixels each having a memory function, the discharge function is divided into a plurality of pixels to generate a memory function. Characterized in that the partition wall is formed in the shape of a multi-stage.

In addition, the driving method of the plasma display display panel of the present invention for achieving the above object is supported by a partition wall in which the first and second substrates are in parallel to separate the discharge space, either one of the first and second substrates The first electrode formed on the substrate and the second electrode formed on the partition wall form a predetermined discharge pixel in a predetermined pattern, and on the other substrate, a plasma display display panel is provided with third electrodes forming a pair of predetermined intervals with a dielectric layer applied thereon. A driving method of the method comprising: applying a discharge start voltage between the first electrode and a second electrode to initiate a discharge; and applying a sustain voltage to the third electrode to maintain the discharge that occurred in the first step. This is done in a second step.

1 is a structural diagram of a conventional plasma display panel.

2 is a cross-sectional view of the structure of FIG.

3 is a drive waveform diagram for driving FIG.

4 is a structural diagram of a plasma display panel according to the present invention;

5 is a cross-sectional view of the structure of FIG. 4.

FIG. 6 is a drive waveform diagram for driving FIG. 4. FIG.

*** Explanation of symbols for the main parts of the drawing ***

10: front substrate 20: first sustain electrode

30: second sustain electrode 40: dielectric layer

50: protective film 60: cathode electrode

70: partition 80: anode electrode

90 phosphor 100 back substrate

110: write discharge space 120: sustain discharge space

Hereinafter, the present invention will be described with reference to the accompanying drawings.

FIG. 4 is a structural diagram of a plasma display panel according to the present invention, and FIG. 5 is a cross-sectional view of the structural diagram of FIG. 4, wherein the front substrate 10, the front substrate 10, The back substrate 100 positioned in parallel with a predetermined distance therebetween, two-stage partition walls 70 forming a discharge space between the front substrate 10 and the back substrate 100, and the front substrate 10 The first and second sustain electrodes 20 and 30 are arranged in parallel with each other at predetermined intervals, and the dielectric layer 40 and the passivation layer 50 are formed on the first and second sustain electrodes 20 and 30. The stripe-shaped anode electrode 80 is arranged on the rear substrate 100 so as to be orthogonal to the barrier rib 70, and the cathode electrode 60 is formed on one side of the barrier rib 70 in the same direction.

In the drawings, reference numeral 90 denotes a phosphor, 110 denotes a write discharge space, and 120 denotes a sustain discharge space.

When described with reference to Figures 4 to 6 attached to the operation and effect of the present invention configured as described above are as follows.

First, the present invention structurally separates the cathode electrode 60 and the anode electrode 80 for write discharge and the first and second sustain electrodes 20 and 30 for sustain discharge.

That is, in the process in which the write discharge occurs, the scan pulse shown in FIG. 6 is applied to the cathode electrode 60 provided on one side of the first stage of the second stage partition wall 70 of the back substrate 100 and the write pulse is simultaneously applied. When (Writing Pulse) is applied to the anode electrode 80, a write discharge occurs in the write discharge space 110, thereby forming priming particles (a sufficient amount of space charge, quasi-excited atoms, and photons). .

After such write discharge occurs, when a predetermined sustain pulse shown in FIG. 6 is alternately applied to the first and second sustain electrodes 20 and 30 located on the front substrate 10, the discharge space in which the write discharge is generated. That is, the discharge and light emission of the pixel are maintained during the sustain period.

Here, the pixel to which the write pulse is applied by the priming particles generated by the initial write discharge has a low discharge voltage during display discharge, and once discharged, only the excitation of the sustain pulse sustains the discharge.

6 illustrates a driving waveform for driving an arbitrary pixel. As shown in FIG. 6, a scan pulse is sequentially applied to a plurality of cathode electrodes, and a write pulse is applied only to an anode electrode corresponding to a pixel to emit light.

Therefore, the contrast can be improved by eliminating unnecessary discharge, and the current capacity of the driving circuit can be reduced.

On the other hand, the voltage of Vw-Vk is set higher than the discharge start voltage Vb and the priming particles are generated at the intersection of the cathode electrode and the anode electrode, that is, in the write discharge space during the write discharge.

The sustain pulses Vs are alternately applied to the pair of sustain electrodes, respectively, and are set lower than the discharge start voltage.

Vw-Vk < Vb < Vs.

Therefore, the pixel which does not generate discharge by a write pulse does not generate discharge even if the sustain voltage Vs is applied.

As described above, the present invention not only improves luminance by removing the existing auxiliary discharge space by structurally separating the electrode generating the write discharge and the electrode causing the sustain discharge, but also increases the pixel per unit area. Therefore, it is possible to design a plasma display panel with high resolution and to improve the bladder characteristic in the discharge space.

In addition, unlike the current discharge capacity of the driving circuit increases by performing the auxiliary discharge in all the existing discharge pixels in the auxiliary discharge pixels, the present invention improves the contrast of the screen by performing write discharge only for the pixels to emit light, By minimizing the limit on the current capacity of the furnace, it is possible to simplify the design of the driving circuit and to reduce the manufacturing cost when manufacturing the panel.

Claims (6)

In the structure of a pixel of a matrix display panel composed of a plurality of pixels each having a memory function, And a partition wall formed in a plurality of stages so as to generate a memory function by separating a plurality of discharge spaces in each pixel. The method of claim 1, The barrier rib is formed in two stages to form a first space for generating a write discharge for generating a memory function and a second space for generating a sustain discharge by the memory function. . The method according to claim 1 or 2, A predetermined discharge pixel is formed in a predetermined pattern using a stripe-shaped first electrode formed on one of the first and second substrates supported by the partition wall and a stripe-shaped second electrode formed on an end of the partition wall in a predetermined pattern. 3. The structure of the plasma display panel comprising a third electrode formed on the substrate in pairs at predetermined intervals. The method of claim 3, wherein And a dielectric layer and a protective layer formed on the third electrode formed on the other substrate. The first and second substrates are supported by a partition wall parallel to each other to separate the discharge space, and the first electrode formed on any one of the first and second substrates and the second electrode formed on the partition wall have a predetermined pattern. In the method of driving a plasma display display panel in which a predetermined discharge pixel is formed, and a third electrode is formed on the other substrate in a state where a dielectric layer is applied to form a pair of third electrodes. A first step of starting a discharge by applying a discharge start voltage between the first electrode and the second electrode; And a second step of applying a sustain voltage to the third electrode to hold the discharge generated in the first step. The method of claim 5, And a predetermined sustain voltage is alternately applied to the third electrodes, respectively.