KR19990065835A - 3-electrode surface discharge plasma display panel - Google Patents

Abstract

The present invention relates to a three electrode surface discharge plasma display panel (hereinafter referred to as a three electrode surface discharge PDP),

Unlike the conventional technology in which one scan electrode and one sustain electrode are formed for each cell, in the present invention, two scan electrodes and one common sustain electrode constitute two cells, and thus the sustain electrode as a whole. Characterized by reducing the number of halves.

According to the present invention as described above, since the brightness of the screen can be increased and the structure of the cells can be simplified, it is advantageous to realize a high resolution display and the driving is simple.

Description

3-electrode surface discharge plasma display panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for driving a three-electrode surface discharge PDP, and more particularly to a three-electrode surface discharge PDP comprising two cells consisting of two scan electrodes and one sustain electrode.

The CRT (Cathode Ray Tube), which has been the mainstay of the display means, scans the electron beam through the entire fluorescent surface with a single electron gun, so the distance between the fluorescent surface and the electron gun must be large.

Due to the above characteristics, the CRT is bulky, heavy, difficult to realize a flat screen, and difficult to realize a large screen.

In order to overcome the problems of the CRT as described above, various display technologies such as LCD, flat vision panel, and plasma display pannel (PDP) are thin and light and enable large screen realization.

Among them, the PDP is applied to the surface of the rear substrate by ultraviolet rays generated when a discharge gas is injected between the thin front substrate and the rear substrate on which the plurality of transparent electrodes are formed, and discharged by applying a voltage between the transparent electrodes. The phosphor emits light, and each of the light emitting elements composed of the electrode and the phosphor is formed of cells separated by partition walls, and each of them is driven independently. Not only is it easy to implement a large screen, but also has the advantage of eliminating color bleeding and deterioration of focus, so it has become a focus of attention as a new display means that can overcome the limitation of CRT.

The PDP is classified into a DC PDP driven by a DC voltage and an AC PDP driven by a sine wave AC voltage or a pulse voltage according to the type of driving voltage. In this paper, only the AC PDP will be discussed.

1 shows a color three-electrode surface discharge PDP having a 640 × 480 resolution, which is generally used, and a typical three-electrode surface discharge PDP that displays moving images or still images on the three-electrode surface discharge PDP. A simplified configuration of the furnace is shown.

In FIG. 1, reference numeral 10 denotes 480 scan electrodes Y _{1 to} Y ₄₈₀ and 480 sustain electrodes Z _{1 to} Z ₄₈₀ alternately arranged in parallel with each other, and 1920 address electrodes A _{1 to} A ₁₉₂₀ are arranged to be orthogonal to the scan electrodes and sustain electrodes Y ₁ to Y ₄₈₀ and Z _{1 to} Z ₄₈₀ with a predetermined space therebetween, and the 480 scan electrodes and sustain electrodes Y _{1 to} Y _480. , Z _{1 to} Z ₄₈₀ ) and cells at each intersection of ₁₉₂₀ address electrodes A _{1 to} A ₁₉₂₀ , so that the entire screen is 480 × 1920 matrix R (Red), G (Green), B (Blue) A color three-electrode surface discharge PDP with a resolution of 640 x 480 composed of cells.

The 480 sustain electrodes Z ₁ to Z ₄₈₀ are connected in parallel to each other by the common sustain electrode Z.

Reference numeral 20 is connected to the scanning electrodes (Y ₁ ~Y ₄₈₀₎ of the three-electrode surface discharge PDP (10) shows a scan electrode driver for supplying a driving pulse to the scan electrodes (Y ₁ ~Y _480),

30 denotes a sustain electrode driver connected to the common sustain electrode Z of the 3-electrode surface discharge PDP 10 to supply driving pulses to the sustain electrodes Z ₁ to Z ₄₈₀ through the common sustain electrode Z. ,

40 is connected to the address electrodes A _{1 to} A ₁₉₂₀ of the three-electrode surface discharge PDP 10 to selectively drive pulses to the address electrodes A _{1 to} A ₁₉₂₀ according to a digital image signal corresponding to each cell. Indicates an address driver for supplying

50 digitizes the analog image signal IMAGE input from the outside to output a digital image signal, and the digital image signal and various external inputs (clock CLK, horizontal synchronization signal HS, vertical synchronization signal VS) According to the present invention, a control unit generates various control signals and driving pulses and supplies them to the scan electrode driver 20, the sustain electrode driver 30, and the address driver 40.

Meanwhile, a structure of one cell will be described with reference to FIG. 2, in which a cross-sectional view of a cell positioned in an i th row and a j th column of the three-electrode surface discharge PDP 10 is rotated by 90 °. Is as follows.

First, the i-th scanning electrode Y _i and the i-th sustain electrode Z _i parallel to each other are formed on one surface of the front substrate 11 which is the display surface of the image, and the scan electrode Y _i and the sustain electrode are A dielectric layer 12 is formed on (Z _i ) to limit the discharge current during discharge and to facilitate generation of wall charges, and the scan electrode (Y _i ) is formed from sputtering occurring during discharge on the dielectric layer 12. And a magnesium oxide (MgO) protective film 13 which protects the sustain electrode Z _i and the dielectric layer 12.

Further, a j-th address electrode A _j is formed on a surface opposite to the front substrate 11 of the rear substrates 14 that are opposed to each other with the front substrate 11 at a predetermined distance therebetween. electrode (a _j) to prevent inter-cell color mixture on both sides of the first and second partition walls, and secured to the discharge space (15a, 15b) is, and is formed in the parallel to the address electrode (a _j), respectively, and the address electrode (a _j of Phosphor 16 is coated on a portion of the first and second partitions 15a and 15b, and a discharge gas is injected into the discharge space.

The basic driving principle of each cell of the three-electrode surface discharge PDP configured as described above is as follows.

First, a magnesium oxide above the scan electrodes (Y _i) and the address electrode (A _j) by applying a predetermined voltage between the scan electrodes (Y _i) and the address electrode (A _j) up the address discharge scanning electrodes (Y _i) between Wall charges of opposite polarities are generated on the surface of the protective film 13 and the surface of the phosphor 16 on the address electrode A _j , respectively. At this time, the wall charges having the same polarity as the wall charges generated on the surface of the phosphor 16 on the address electrode A _j are also generated on the surface of the magnesium oxide protective film 13 on the sustain electrode Z _i .

Then, the scan electrodes (Y _i) and the sustain electrode (Z _i) of when the scan electrode is a predetermined voltage of the wall charges with the same polarity (Y _i) and the sustain electrode (Z _i) generated by the address discharge before directly between Sustain discharge occurs in the liver.

When the sustain discharge occurs, an electric field is generated in the discharge space to accelerate the trace electrons in the discharge gas, and when the accelerated electrons collide with the neutral particles of the discharge gas, the neutral particles are ionized into electrons and ions. Electrons are also accelerated by the electric field to participate in collisions with the neutral particles, whereby the neutral particles are rapidly ionized into electrons and ions (Electron Avalanche) and the discharge gas is brought into a plasma state while vacuum ultraviolet rays When the vacuum ultraviolet rays excite the phosphor 16 to generate visible light, the cells located in the i th row and the j th column are displayed.

Thereafter, when performing the step of applying an alternating voltage between the scan electrodes (Y _i) and the sustain electrode (Z _i) repeated each time the voltage between the scan electrodes (Y _i) and the sustain electrode (Z _i) change The discharge occurs, and the light emitted from the phosphor 16 is maintained by the ultraviolet rays generated at this time to maintain the display of the cells located in the i th row and the j th column.

However, the conventional three-electrode surface discharge PDP having the above structure has a problem that is not suitable for high resolution.

That is, a high resolution display requires a resolution of about 1280 × 1024 or 1280 × 720, which is higher than that of a conventional 640 × 480 resolution. In order to implement the numbered cells, the area occupied by one cell is reduced, so that the luminance decreases as the emission area decreases.

In addition, as the distance between electrodes increases, crosstalk between cells increases and the probability of erroneous discharge between adjacent cells also increases.

The present invention has been made to solve the above-described problems of the prior art, and unlike the prior art, in which each scan cell and one sustain electrode need to have one scan electrode and one sustain electrode, two scan electrodes and one common sustain electrode are used. It is an object of the present invention to provide a three-electrode surface discharge PDP that is easy to drive and has increased brightness because the cells are configured with fewer electrodes than conventional cells, and the cell configuration is simplified and the light emitting area is wider.

1 is a view showing a typical three-electrode surface discharge plasma display panel (hereinafter referred to as a three electrode surface discharge PDP) and a driving circuit thereof;

FIG. 2 is a view showing a cell structure of the three-electrode surface discharge PDP shown in FIG. 1;

3 is a view showing an electrode structure of the present invention,

4 is a view showing a three-electrode surface discharge PDP constructed by applying the present invention.

Explanation of symbols for main parts of the drawings

Y _i , Y _{i + 1} : Scanning electrode

Z _i , Z _{i + 1} , Z _k : sustain electrode

The three-electrode surface discharge PDP according to the present invention for solving the above object,

In a three-electrode surface discharge plasma display panel (hereinafter, referred to as a three-electrode surface discharge PDP) in which cells constituting pixels are arranged in an M × N matrix form,

M horizontal scanning electrodes formed one by one for each row of the M × N matrix and one cell formed in each of two rows of the M × N matrix to form corresponding cells by interaction with adjacent horizontal scan electrodes. It characterized in that it comprises a driving M / 2 horizontal holding electrodes.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a view showing the electrode structure of the present invention as described above.

FIG. 3A is a diagram illustrating the cell structure according to the related art, in which the scan electrode and the sustain electrode are provided for each cell.

As shown, it can be seen that scan electrodes Y _i and Y _{i + 1} and sustain electrodes Z _i and Z _{i + 1} are formed in each cell.

3B is a view for explaining the electrode structure of the present invention, in which there is one scan electrode Y _i and Y _{i + 1} for each cell, and one sustain electrode Z _k on the boundary of the two cells. Is formed.

In the present invention having the structure as described above, it can be seen that the number of sustain electrodes is reduced by half compared to the conventional electrode structure as shown in FIG.

Meanwhile, the three-electrode surface discharge PDP having the electrode structure of the present invention as described above can drive all operations of the three-electrode surface discharge PDP such as an addressing process and a sustain process without any abnormality. As shown in c), a case of applying a driving pulse can be considered.

When a sustain pulse is applied to the scan electrodes Y _i and Y _{i + 1} and the sustain electrodes Z _k formed between the two cells, as shown in the drawing, the sustain of the two cells consisting of the three electrodes is shown. It can be seen that this is maintained.

Also, it addressing process for controlling the on / off (ON / OFF) state of the two cells may be done by applying a drive pulse to the three electrodes, Y _i electrode, as shown in c of Fig. 3) _Applying a pulse of V _s + V _scan voltage at the same time and applying a pulse of -V _p voltage to the common holding electrode Z _k , the voltage between the Y _i electrode and Z _k electrode V _s + V _scan + V _p is the discharge start voltage. Since it is higher, the cell consisting of the Y _i electrode and the Z _k electrode is turned on, and similarly, a pulse of V _s + V _p is applied to the Z _k electrode and a pulse of -V _scan voltage is applied to the Y _{i + 1} electrode. It can be seen that the cell consisting of the Z _k electrode and the Y _{i + 1} electrode is turned on.

The electrode structure of the present invention as described above is shown in Figure 4 applying the entire three-electrode surface discharge PDP.

Referring to the drawings, one sustaining electrode (Z ₁ , Z ₂ ,..., Z _{N / 2} ) per two scanning electrodes Y ₁ , Y ₂ , Y ₃ , Y ₄ ,..., Y _N-1 , Y _N. It is seen that the number of sustain electrodes is cut in half compared to the conventional three-electrode surface discharge PDP.

According to the present invention, unlike the conventional technology in which one scan electrode and one sustain electrode are provided for each cell, the number of sustain electrodes required for the 3-electrode surface discharge PDP is formed by forming two cells with two scan electrodes and one sustain electrode. In half, the area occupied by the electrode is reduced to increase the luminance.

On the other hand, since the structure of the three-electrode surface discharge PDP is simplified, it can be applied for high resolution.

In addition, since it is not necessary to increase the frequency of the sustain pulse in order to increase the luminance as in the related art, it is possible to drive the three-electrode surface discharge PDP at a low speed, thereby simplifying the driving.

Claims (1)

In a three-electrode surface discharge plasma display panel (hereinafter, referred to as a three-electrode surface discharge PDP) in which cells constituting pixels are arranged in an M × N matrix form, M horizontal scanning electrodes formed one by one for each row of the M × N matrix and one cell formed in each of two rows of the M × N matrix to form corresponding cells by interaction with adjacent horizontal scan electrodes. A 3-electrode surface discharge PDP comprising M / 2 horizontal sustain electrodes for driving.