KR20010084403A - Plasma Display Panel and Method for Driving it - Google Patents

Abstract

PURPOSE: A plasma display panel and method for driving the same is provided to minimize capacitive load by installing a wiring ring electrode at the display cell, and improve response speed by utilizing a priming effect. CONSTITUTION: A plasma display panel comprises an intermediate dielectric plate(3) having an upper transparent dielectric plate(1) for forming a display charge space, a cell separation barrier rib(2) coated with a fluorescent material and one or more priming holes; an X-display electrode(4) and a Y-display electrode(5) arranged onto the dielectric plate in such a manner as to be opposed with each other, and which discharge by a sustaining pulse; a scan electrode disposed beneath the intermediate dielectric plate, and to which a scanning pulse is applied sequentially from the top to bottom; and a data electrode(8) arranged to be parallel with the scan electrode, and which has an interior insulated so as to carry out write discharge in synchronization with the scan pulse.

Description

Plasma Display Panel and Method for Driving it

The present invention relates to a plasma display panel (PDP) and a driving method thereof. More particularly, the present invention provides a wiring electrode in a display cell to minimize a capacitive load, and a pre-discharge space and a priming on the back of an intermediate dielectric plate. The present invention relates to a plasma display panel (PDP) in which a display discharge per frame at which a response speed is increased by using a priming effect by preliminary discharge by installing a hole, and a driving method thereof.

In general, a plasma display panel (PDP) is an alternating current (AC) type PDP in which electrodes are coated with a dielectric, and a direct current type (DC) type PDP in which X and Y electrodes are exposed to a discharge space. It is rough.

Here, the AC type PDP adopts a coplanar discharge type and when the memory is driven using wall charges, the old information memories and wall charges must be erased in order to input new display information. This requires an initialization period and is disadvantageous for displaying a large amount of information for reasons such as a statistical delay time of discharge. In addition, in the conventional plasma display panel as described above, since the display electrodes are distributed only in a part of the discharge space, only a part of the electric field is used, the electric field efficiency is lowered, and as a result, the discharge efficiency is lowered.

The present invention is to solve the above conventional problems, to minimize the capacitive load by installing a wiring electrode in the display cell, and to protrude the display electrode in the discharge space to maximize the electric field efficiency and discharge efficiency, By providing a preliminary discharge space and a priming hole in the center, an initialization period due to a priming effect can be omitted, thereby providing a color plasma display panel and a driving method that can increase display discharge rate per frame and facilitate moving images with fast response characteristics. It is aimed at.

1 is a block diagram of a plasma display panel according to an embodiment of the present invention,

2 is a cross-sectional view taken along a direction perpendicular to the data electrode of FIG. 1;

3 is a cell plan view for explaining the dimensions of the display cell;

4 is a cell arrangement diagram for explaining a driving method of FIG. 1;

5 is a current-voltage characteristic diagram of gas discharge,

6 is a PDS driving waveform diagram for explaining the driving method of the present invention;

FIG. 7 is a view for explaining a 256 gradation display method using 8 subfields according to FIG. 1; FIG.

8 is a configuration diagram of a plasma display panel according to a second embodiment of the present invention;

9 is a cross-sectional view taken along a direction perpendicular to the data electrode of FIG. 8;

10 is a configuration diagram of a plasma display panel according to a third embodiment of the present invention;

FIG. 11 is a cross-sectional view taken along a direction perpendicular to the data electrode of FIG. 10;

12 is a configuration diagram of a plasma display panel according to a fourth embodiment of the present invention;

FIG. 13 is a cross-sectional view taken along a direction perpendicular to the data electrode of FIG. 12.

<Description of Signs of Major Parts of Drawings>

(One) ; An upper transparent dielectric plate, (2); Bulkhead (3); Intermediate dielectric plate (4); Display electrodes X and (5); Display electrodes Y and (6); Priming hole, 7; Scan electrode (8); A data electrode (9); Lower dielectric plate, P _H ; Horizontal pitch of cell, P _V ; Vertical pitch of the cell, D _R ; Diameter of wire rings (display electrodes X, Y), D _H ; Diameter of priming hole, G; Spacing of wirings (display electrodes X, Y), D1, D2, D3. Data electrodes, X1, X2, X3 .Xn; Display electrodes X, Y1, Y2, Y3 .Yn; Display electrodes Y and I; Current, V; Voltage, R; Resistance, Vw; Write voltage, Vf; Discharge start voltage, Vs; Discharge sustain voltage, SF1, SF2, SF3 ..SFn; Subfield.

According to the plasma display panel according to the present invention, an upper transparent dielectric plate for forming a display discharge space, a cell isolation barrier and an intermediate dielectric plate coated with phosphors on an inner surface thereof; An X display electrode and a Y display electrode disposed on the intermediate dielectric plate to face each other and discharged by a sustain pulse; A scan electrode positioned below the intermediate dielectric plate and sequentially receiving a scan pulse from top to bottom; And a data electrode which is insulated therein so as to be write discharge in synchronization with the scan pulse.

In addition, the driving method of the plasma display panel includes the steps of sequentially scanning the scan pulse from the top to the bottom by the scan electrode in the preliminary discharge space of the panel filled with the inert gas; Applying an on / off data pulse from the data electrode to write discharge to synchronize with the scan pulse in the scanning step; Maintaining charged discharge gas at a constant voltage after the write discharge to generate charged particles; Injecting the charged particles into a display discharge space surrounded by the intermediate dielectric plate, the upper transparent dielectric plate, and a cell isolation barrier having phosphors coated on an inner surface thereof through a priming hole positioned below the intermediate dielectric plate; Applying a sustain pulse voltage to X and Y display electrodes disposed to face each other in the display discharge space; And displaying discharge by the sustain pulses of the X and Y display electrodes in the display discharge space.

Hereinafter, the first, second and third embodiments of the driving apparatus of the plasma display panel of the present invention will be described with reference to FIGS. 1 to 11. Meanwhile, in the second and third embodiments, reference numerals corresponding to the technical terms used in FIGS. 8 to 13 correspond to those of the reference numerals used in FIGS. 1 and 2.

1 is a perspective view showing a plasma display panel of the present invention. According to FIG. 1, the plasma display panel is formed of a display discharge space as an upper transparent dielectric plate 1, a phosphor is coated on an inner surface thereof, and a cell isolation barrier 2 and an intermediate dielectric plate 3 for separating each cell. have. In this display discharge space, the display electrodes X (4) and the display electrodes Y (5) for holding a mixed gas discharge by inputting sustain pulses are arranged to face each other in the form of a wire covered with a dielectric. The X and Y display electrodes 4 and 5 protrude from the priming hole 6. In addition, the X and Y display electrodes 4 and 5 disposed opposite to each other in the plasma display panel are located in a discharge space coated with a phosphor, that is, the center of the electric field of the discharge is collected in a limited center region, so that the space between the two display electrodes is spaced. This can increase the efficiency of the electric field and the discharge efficiency.

The lower surface of the intermediate dielectric plate 3 has a priming hole 6 and a scan electrode 7 formed at the center in the horizontal direction, and the lower data plate 8 has a structure in which the vertical data electrode 8 is disposed.

In this three-dimensional structure, the electrodes are exposed in three dimensions, thereby minimizing the capacitive load of the display electrode X (4) and the display electrode Y (5) and maximizing the electric field efficiency to greatly reduce the power consumption.

FIG. 2 is a cross-sectional view of the plasma display panel of FIG. 1 taken along arrow A-A '. FIG. 2 is a structure having the preliminary discharge space of FIG. 1, by which the capacitive load of the X and Y display electrodes can be minimized and the power consumption can be minimized, and the X and Y display electrodes are discharged into the discharge space. It is exposed in three dimensions to maximize the electric field efficiency.

FIG. 3 is a cross-sectional view for schematically illustrating the plasma display panel of FIG. 2, and is viewed geometrically with respect to the upper surface of FIG. 2. According to FIG. 3, the relationship of the diameter D _R and the spacing position G of the wiring consisting of the display electrodes X and Y in the display cell according to the pitch is

D _R = 3/4 P _H and G = 3/4 P _V ------------------------- Equation-1)

Is determined. Where P _H is the horizontal pitch of the cell and P _V is the vertical pitch of the cell.

It can be understood that by Equation-1, the plasma can be confined to the entire discharge space and the discharge efficiency can be maximized.

In addition, the diameter D _H of the priming hole 6 of the intermediate dielectric plate 3 is a relation according to the plasma covering effect,

D _H > 10 ------------------------------------------ Expression-2)

Decide on

In the above formula-2 Is the Debey Length, which is a measure of the electrical neutral collapse in plasma. ego, Is the Boltzmann constant, Is the electronic temperature, Is the electron density.

As can be seen from Equation -2, the priming hole 6 in the structure of Fig. 3 can effectively supply the charged particles to the discharge space effectively, thereby increasing the address margin.

4 illustrates an electrode cell arrangement of a plasma display panel (PDP). 4, the X electrodes (X1, X2, X3, X4, X5) are connected to one driving circuit in a common line so that only a sustain pulse is applied, and the Y electrodes (Y1, Y2, Y3, Y4, Y5. ..... Yn) are connected to enable individual driving when the driving electrode and the scan pulse are sequentially applied when the sustain pulses of the X electrodes are applied. At this time, the data electrodes D1, D2, D3, D4, D5, ... D5 apply data pulses simultaneously and individually in synchronization with the Y electrode being scanned.

FIG. 5 illustrates that the voltage-current at the time of discharge is changed by the structure of FIG.

In the graph of FIG. 5, when the sustain pulse Vs is constantly maintained in the display discharge space, the predetermined voltage V1 does not operate when the discharge start voltage Vf is lower than the dielectric breakdown of the gas. However, when the write voltage Vw is applied to the scan electrode Y and the data electrode A above the breakdown voltage Vf in the preliminary discharge space, discharge occurs in the preliminary discharge space to generate charged particles. These charged particles diffuse into the display discharge space through the priming hole at a high speed, thereby lowering the impedance of the discharge space. That is, the current flows easily and the voltage drops. Therefore, the display space is discharged only at a low voltage, that is, the sustain pulse voltage (Vs).

6 is a PDS driving waveform diagram for explaining a driving method, which will be described below with reference to FIG. 2. According to FIG. 6, for driving a priming drive system (PDS), scan pulses are sequentially applied from top to bottom by the first scan electrode 7. At this time, the scan pulse of the scan electrode 7 is written discharge in synchronism with the data pulse from the data electrode 8 to accumulate a plurality of charged particles, that is, wall charges generated by the discharge, in the dielectric layer where the inside is insulated. Will be. These charged particles are injected into the corresponding display discharge space through the priming hole 6 to lower the impedance of the display cell discharge space. In addition, since the priming hole 6 secures a predetermined space, the possibility of recombination of the output gas due to discharge is reduced, so that the reset time for the sustain discharge is shortened, for example, from 400 nsec to 100 nsec. Eliminate time

Subsequently, display discharge occurs due to a sustain pulse applied from the display electrode X (4) and the display electrode Y (5). This display discharge is maintained for a period of time in accordance with the number of pulses of the subfield implementing gray scale.

The input information is erased by applying the erase pulse or stopping the application of the display pulse. When the next subfield returns, it repeats in the same way as before.

That is, the driving pulse voltage of FIG. 5 is a scan pulse Sp indicated by a dotted line applied to the Y1 electrode when the common display electrode Xc becomes the sustain voltage Vs with a constant pulse period in FIG. It can be seen that when the pulse Sp is applied and the scan pulse Sp is sequentially applied to the Y3 .. Yn electrode, the data pulse is formed by the data electrode 8. Here, the voltage difference waveform is formed by the difference between the X display electrode, the Y2 electrode, and the address electrode, and is, for example, the voltage difference X-Y2-A by the X holding pulse, Y2 holding pulse, Y2 scan pulse, and address pulse data Dp. As shown in FIG. 5, it can be seen that the write pulse voltage Vw is generated according to the operations of the Y electrode and the A electrode.

Fig. 7 is a diagram showing gradation display for realizing a high quality color image by time division of 8-bit 256 gradations for obtaining a color image. FIG. 7 shows that the eight display luminances are combined by subfields SF having different display luminances for a signal of one frame having one complete image information. Referring to FIG. 7, when the write pulse is applied without the initialization time according to the charge of the preliminary discharge space in the subfield, the sustain pulse is displayed for the first 512 pulses and then the erase pulse is applied, and this operation is repeated. Can be.

8 is a configuration diagram of a plasma display panel according to a second exemplary embodiment of the present invention, and FIG. 9 is a cross-sectional view taken along a direction perpendicular to the data electrode of FIG. 8. 8 and 9 are similar in configuration and operation to the above-described first embodiment, and thus detailed description thereof will be omitted. However, referring to Figs. 8 and 9, the X display electrode 4 insulated with a dielectric has a circular or elliptical ring at one end thereof and is rod-shaped at the other end and fixed on the intermediate dielectric plate 3. ??-Contains a shaped electrode The Y display electrode 5 also includes a ??-shaped electrode like the X display electrode 4. The size of the Y display electrode 5 is smaller than that of the X display electrode 4. Here the central axis of the round or oval ring coincides with the central axis of the priming hole.

10 and 11 illustrate a configuration of a plasma display panel according to a third exemplary embodiment of the present invention. 10 and 11 are similar in configuration and operation to the first embodiment described above, and thus detailed description thereof will be omitted. However, referring to FIGS. 10 and 11, the X display electrode 4 and the Y display electrode 5 insulated with a dielectric form square or rectangular electrodes, and either end is fixed on the intermediate dielectric plate 3.

12 is a configuration diagram of a plasma display panel according to a fourth embodiment of the present invention, and FIG. 13 is a cross-sectional view taken along a direction orthogonal to the data electrode of FIG. 12. Referring to FIGS. 12 and 13 of the fourth embodiment, FIG. The X display electrodes 4 of the transparent ITO electrodes are arranged in a lattice form along the top of the partition wall.

Meanwhile, the upper transparent dielectric plate 1, the partition wall 2, the intermediate dielectric plate 3, the display electrode X (4), the display electrode Y (5), and the priming hole shown in the drawings of the first to fourth embodiments are shown. 6) All the electrodes, including the scan electrode 7, the data electrode 8 and the lower dielectric plate 9, can be driven in an insulated state with a dielectric. These electrodes are coated with a ceramic material system such as PbO, B ₂ O _3, SiO _2, and the like.

Therefore, in the present invention, the response speed is increased by utilizing the prismatic effect of the preliminary discharge by the color plasma display panel and the driving method as described above, and the display discharge period per frame can be maximized because no separate initialization period is provided. . In addition, since there is no initialization discharge, a high contrast ratio can be realized, and an image with high brightness and high quality is obtained. In addition, the wiring of the display electrodes X and Y is projected to face the display discharge space in three dimensions to minimize the capacitive load of the panel and maximize the efficiency of discharge.

Embodiments of the present invention is for the purpose of illustration, those skilled in the art, modifications, changes, replacements will be possible through the technical scope illustrated in this specification.

Claims (11)

Plasma display panel, An intermediate dielectric plate including an upper transparent dielectric plate for forming a display discharge space, a cell isolation barrier having phosphors coated on an inner surface thereof, and at least one priming hole; An X display electrode and a Y display electrode disposed on the intermediate dielectric plate to face each other and discharged by a sustain pulse; A scan electrode positioned below the intermediate dielectric plate and sequentially receiving a scan pulse from top to bottom; And a data electrode disposed in parallel with the data electrode and insulated therein so as to be write discharge in synchronization with the scan pulse. The plasma display panel of claim 1, wherein the X display electrode and the Y display electrode include a wiring electrode coated with a dielectric. The plasma display panel of claim 1, wherein the X display electrode and the Y display electrode comprise a pair of wiring electrodes having the same size and shape. The plasma display panel of claim 1, wherein the size of the X display electrode includes a wiring electrode larger than the size of the Y display electrode. 3. The plasma display panel of claim 1 or 2, wherein the X display electrode includes an electrode having an elliptical ring at one end and a rod at the other end. The plasma display panel of claim 5, wherein the X display electrode comprises an electrode in which the rod-shaped electrode portion is fixed on an intermediate dielectric plate. The plasma display panel of claim 5, wherein the X display electrode and the Y display electrode are bent in a ??-shape, and the center axis of the ring coincides with the center axis of the priming hole. The plasma display panel of claim 1, wherein the X display electrode and the Y display electrode include rectangular electrodes disposed to face each other. The plasma display panel of claim 1, wherein the X display electrode comprises a lattice electrode arranged along an upper portion of the partition wall. The plasma display panel of claim 1, wherein the upper transparent dielectric plate, the partition wall, the intermediate dielectric plate, the display electrode X, the display electrode Y, the priming hole, the scan electrode, the data electrode, and the lower dielectric plate are insulated from the dielectric. Display panel. In the driving method of the plasma display panel, Sequentially scanning the scan pulse from the top to the bottom by the scan electrode in the preliminary discharge space in the panel filled with the inert mixed gas; Applying an on / off data pulse from the data electrode to write discharge to synchronize with the scan pulse in the scanning step; Generating charged particles by the write discharge; Injecting the charged particles into a display discharge space surrounded by the intermediate dielectric plate, the upper transparent dielectric plate, and a cell isolation barrier having phosphors coated on an inner surface thereof through a priming hole positioned below the intermediate dielectric plate; Applying a sustain pulse voltage to X and Y display electrodes disposed to face each other in the display discharge space; And discharging the display by the sustain pulses of the X and Y display electrodes in the display discharge space.