KR20080051589A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to minimize the damage of scan and sustain electrodes by decreasing discharge intensity per unit area of the scan and sustain electrodes. A plasma display panel includes an upper substrate(51), sustain electrode pairs(Y1,Z1), an upper dielectric layer(56), a protective layer(57), an address electrode(X1), a lower dielectric layer(54), a barrier rib(53), and a fluorescent layer(55). The sustain electrode pairs are periodically formed on the upper substrate. The upper dielectric layer and the protective layer are formed on the sustain electrode pair. The address electrodes are periodically formed on a lower substrate(52). The lower dielectric layer is formed on the address electrode. The barrier rib and the fluorescent layer are formed on the lower dielectric layer.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

1 is a perspective view showing a conventional plasma display panel.

FIG. 2 is a cross-sectional view illustrating the plasma display panel shown in FIG. 1.

3 is a plan view illustrating an electrode arrangement of the plasma display panel illustrated in FIG. 1.

FIG. 4 is a plan view illustrating sustain discharge of the plasma display panel illustrated in FIG. 1.

5 is a cross-sectional view illustrating an electrode structure of a plasma display panel according to an exemplary embodiment of the present invention.

6 is a plan view schematically illustrating a plasma display panel having an electrode structure according to an exemplary embodiment of the present invention.

7 is a plan view schematically showing a plasma display panel having an electrode structure according to an embodiment of the present invention.

8 is a plan view schematically illustrating a plasma display panel having a general electrode structure.

9 is a plan view schematically showing a plasma display panel having an electrode structure according to an embodiment of the present invention.

10 is a plan view schematically showing a plasma display panel having an electrode structure according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

51: upper substrate 52: lower substrate

59, 60: sustain electrode pair 71: address electrode

53: bulkhead

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel capable of preventing mis-discharge due to time-varying plasma display panel.

Plasma Display Panels (Plasma Display Panels) typically emit images containing characters or graphics by emitting phosphors by ultraviolet rays of 147 nm generated during gas discharge of He + Xe, Ne + Xe, He + Ne + Xe, etc. Will be displayed. Such a plasma display panel is not only attracting attention as a large area flat panel display due to its easy thin-film and large-scaled display, but also recently, commercial production of companies has begun to expand the market.

Referring to FIGS. 1 and 2, a structure of a plasma display panel of a three-electrode alternating current (AC) type which is commonly used is shown.

1 and 2, the plasma display panel includes sustain electrode pairs 14 and 16 periodically formed on the upper substrate 10 and upper dielectric layers formed on the sustain electrode pairs 14 and 16. 18) and the protective layer 20, the address electrode 22 periodically formed on the lower substrate 12, the lower dielectric layer 24 formed on the address electrode 22, and the lower dielectric layer 24. The partition 26 and the phosphor layer 28 formed are provided.

The upper substrate 10 and the lower substrate 12 are spaced in parallel by the partition wall 26. The partition wall 26 is formed in parallel with the address electrode 22 to prevent ultraviolet rays generated by the discharge from leaking to adjacent cells. The phosphor layer 28 is applied to the surfaces of the lower dielectric layer 24 and the partition wall 26 to generate visible light of any one of red, green, and blue. An inert gas for plasma discharge is injected into the discharge space formed by the partition wall 26 and the upper and lower substrates 10/12.

Each of the sustain electrode pairs 14 and 16 has a transparent electrode 14A and 16A made of transparent electrode material (ITO) having a light transmittance of 90% or more, and a metal electrode having a relatively narrower width than the transparent electrodes 14A and 16A. 14B, 16B). Here, the transparent electrode material (ITO) has a large resistance value and thus does not transmit power efficiently. Therefore, the entirety of the sustain electrode pairs 14 and 16 is formed on the transparent electrodes 14A and 16A by forming metal electrodes 14B and 16B made of a highly conductive material, for example, silver (Ag) or copper (Cu). It will increase the conductivity. These sustain electrode pairs 14, 16 consist of a scan / sustain electrode and a sustain electrode. The scan signal for panel scanning and the sustain signal for sustaining discharge are mainly supplied to the scan / sustain electrode 14, and the sustain signal is mainly supplied to the sustain electrode 16.

The upper dielectric layer 18 and the lower dielectric layer 24 accumulate electric charges discharged from the sustain electrode pairs 14 and 16 and the address electrode 22 during discharge. The protective layer 20 serves to prevent damage to the upper dielectric layer 18 by sputtering of charged particles. As a result, the lifetime of the plasma display panel is extended and the emission efficiency of the secondary electrons is increased. As the protective layer 20, magnesium oxide (MgO) is usually used.

The address electrode 22 is formed to intersect with the sustain electrode pairs 14 and 16. The address electrode 22 is supplied with a data signal for selecting cells to be displayed.

The plasma display panel maintains the discharge by surface discharge between the pair of sustain electrodes 14 and 16 after the discharge cell is selected by the opposite discharge between the address electrode 22 and the scan / sustain electrode 14. In the discharge cells of the plasma display panel, the phosphor 28 emits light by ultraviolet rays generated during the sustain discharge, so that visible light is emitted outside the cell. As a result, the plasma display panel displays an image in pixel units of discharge cells.

In such a plasma display panel, the smaller the ratio of the electrode area to the cell area, the higher the efficiency of the plasma display panel. In detail, the smaller the ratio of the electrode area, the smaller the reactive power consumed for charging the capacitance between the electrodes. Therefore, the plasma display panel employing the electrode having a small proportion of the electrode area consumes less power and improves efficiency characteristics.

In addition, the larger the area of the opposite electrode and the shorter the distance between the electrodes, the more easily the discharge occurs even under a low applied voltage, thereby improving the discharge efficiency.

In addition, the smaller the ratio of the electrode area to the cell area is, the smaller the discharge current of the electrode is. That is, when the discharge current of the electrode is reduced, the self-absorption that the mixed gas filled in the cell absorbs the vacuum ultraviolet rays is reduced, so that a large amount of vacuum ultraviolet rays excite the phosphor. Therefore, the luminous efficiency of the plasma display panel employing the electrode having a small proportion of the electrode area is improved.

The cells 1 of the plasma display panel are arranged in a matrix form on the panel 30 as shown in FIG. 3. Each of the cells 1 intersects the scan / sustain electrode lines S1 to Sm, the common sustain electrode lines C1 to Cm, and the address electrode lines D1 to Dn. The scan / sustain electrode lines S1 to Sm and the common sustain electrode lines C1 to Cm are made up of the sustain electrode pairs 14 and 16 in FIG. The address electrode lines D1 to Dn are formed of the address electrodes 22.

In such a plasma display panel, one frame is composed of a plurality of subfields, and gradation is realized by a combination of subfields. For example, in the case where 256 gray levels are to be realized, one frame period is time-divided into eight subfields. In addition, each of the eight subfields is divided into a reset period, an address period, and a sustain period. The full screen is initialized during the reset period. In the address period, cells in which data is to be displayed are selected by writing discharge. The selected cells are sustained in the discharge period. The sustain period is lengthened by 2n depending on the weight of each of the subfields. In other words, the sustain period included in each of the first to eighth subfields is lengthened at a ratio of 20, 21, 22, 23, 24, 25, 26, 27. To this end, the number of sustain pulses generated in the sustain period is increased to 20, 21, 22, 23, 24, 25, 26, 27 according to the subfields.

The combination of these subfields determines the luminance and chromaticity of the display image.

The light emitting process of the plasma display panel will be described in detail as follows. First, wall charges are uniformly accumulated in the cell on the full screen by the reset discharge occurring in the reset period. In the address period, writing discharge occurs in cells selected by the address discharge voltages supplied to the scan / sustain electrode lines S1 to Sm and the address electrode lines D1 to Dn. Subsequently, when sustain pulses are alternately supplied to the scan / sustain electrode lines S1 to Sm and the common sustain electrode lines C1 to Cm, the discharges of the selected cells are sustained in the address period.

When plasma discharge occurs in the cell, trace electrons in the discharge gases in the cell begin to accelerate and continuously collide with the neutral particles. Due to the avalanche effect, the discharge gases in the cell are rapidly ionized into electrons and ions to become plasma and at the same time, vacuum ultraviolet is generated. This vacuum ultraviolet light excites the phosphors and causes the phosphors to generate visible light.

However, the conventional plasma display panel may cause damage to the protective layer due to mis-discharge due to its discharge structure. In detail, during the sustain discharge of the plasma display panel, as shown in FIG. 4, the plasma display panel starts from the opposite side between the scan / sustain electrode lines S1 to Sm and the common sustain electrode lines C1 to Cm and gradually spreads to the entire cell. do. This discharge structure has a problem in that it is easy to lead to uncontrolled misdischarge because the discharge occurs intensively on only one surface between the scan / sustain electrode lines S1 to Sm and the common sustain electrode lines C1 to Cm.

In addition, the conventional plasma display panel has a problem in that a damping phenomenon occurs due to a discharge delay and a change in impedance of a sustain pulse during counter discharge for sustain discharge, resulting in a decrease in discharge voltage and efficiency.

Accordingly, an object of the present invention is to provide a plasma display panel capable of improving overall reliability by preventing erroneous discharge.

Another object of the present invention is to provide a plasma display panel which can increase the discharge voltage and efficiency by reducing the damping phenomenon caused by the change of the discharge delay and impedance of the sustain pulse during the counter discharge for the sustain discharge. There is.

A plasma display panel according to an embodiment of the present invention for achieving the above object, a plasma display including a sustain electrode pair and an address electrode (X) consisting of a scan / sustain electrode (Y) and the sustain electrode (Z) In the panel, the scan / sustain electrode Y and the sustain electrode Z are patterned to have different areas.

Here, the sustain electrode pair is different from the area of the transparent electrode of the scan / sustain electrode (Y) and the area of the transparent electrode of the sustain electrode (Z), wherein, the transparent electrode of the scan / sustain electrode (Y) The area of? May be larger than that of the transparent electrode of the sustain electrode Z.

 To this end, the transparent electrode of the sustain electrode (Z) is removed by patterning a portion crossing the upper portion of the partition wall, the patterning is the elliptical portion of the upper portion of the partition and the transparent electrode of the sustain electrode (Z) cross Patterned in at least one of a circle, a square, and a rectangle.

In addition, the sustain electrode pair makes the area of the transparent electrode of the sustain electrode Z larger than the area of the transparent electrode of the scan / sustain electrode Y. In this case, in the transparent electrode of the scan / sustain electrode Y, the center portion of the portion crossing the address electrode X is removed by patterning.

Here, the address electrode X protrudes in the longitudinal direction of the sustain electrode pair. To this end, it protrudes at a site intersecting with the scan / sustain electrode Y, protrudes at a site intersecting with the sustain electrode Z, or with the scan / sustain electrode Y and the sustain electrode Z. It may protrude in areas that do not cross.

In addition, the plasma display panel according to the embodiment of the present invention for achieving the above object, includes a sustain electrode pair consisting of a scan / sustain electrode (Y) and the sustain electrode (Z) and the address electrode (X) A plasma display panel is characterized by including a pair of sustain electrodes having an asymmetrical sustain pulse width.

Here, the sustain electrode pair has an asymmetric structure in which the area of the transparent electrode of the scan / sustain electrode Y is smaller than the area of the transparent electrode of the sustain electrode Z. In this case, the transparent electrode of the scan / sustain electrode Y And the gap between the transparent electrode of the sustain electrode Z is maintained at a predetermined distance.

The plasma display panel according to the present invention not only reduces the deterioration phenomenon by lowering the discharge intensity per unit area of the scan / sustain electrode (Y) during sustain discharge. The discharge delay may be reduced by confining wall charge on the scan / sustain electrode Y, and the asymmetric pulse width may be formed to reduce the loss due to damping, thereby forming stable discharge. have.

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

5 is a cross-sectional view illustrating an electrode structure of a plasma display panel according to an exemplary embodiment of the present invention.

Referring to FIG. 5, a plasma display panel having an electrode structure according to an exemplary embodiment of the present invention includes sustain electrode pairs Y1 and Z1 periodically formed on the upper substrate 51, and sustain electrode pairs Y1 and Z1. An upper dielectric layer 56 and a protective layer 57 formed on the lower substrate, an address electrode X1 periodically formed on the lower substrate 52, a lower dielectric layer 54 formed on the address electrode X1, and a lower portion The partition 53 and the phosphor layer 55 formed on the dielectric layer 54 are provided.

The upper substrate 51 and the lower substrate 52 are spaced apart in parallel by the partition wall 53. The partition wall 53 is formed in parallel with the address electrode X1 to prevent ultraviolet rays generated by the discharge from leaking to adjacent cells. The phosphor layer 55 is applied to the surfaces of the lower dielectric layer 54 and the partition wall 53 to generate visible light of any one of red, green, and blue. An inert gas for plasma discharge is injected into the discharge space formed by the partition wall 53 and the upper and lower substrates 51 and 52.

Each of the sustain electrode pairs Y1 and Z1 has a transparent electrode 59a, 60a made of transparent electrode material ITO having a light transmittance of 90% or more, and a metal electrode having a relatively narrower width than the transparent electrode 59a, 60a. 59b, 60b). Here, the transparent electrode material (ITO) has a large resistance value and thus does not transmit power efficiently. Accordingly, the entirety of the sustain electrode pairs Y1 and Z1 is formed on the transparent electrodes 59a and 60a by forming metal electrodes 59b and 60b made of a highly conductive material such as silver (Ag) or copper (Cu). It will increase the conductivity. These sustain electrode pairs Y1 and Z1 are composed of a scan / sustain electrode 60 and a sustain electrode 59. The scan signal for panel scanning and the sustain signal for sustaining discharge are mainly supplied to the scan / sustain electrode 60, and the sustain signal is mainly supplied to the sustain electrode 59.

The upper dielectric layer 56 and the lower dielectric layer 54 accumulate electric charges discharged from the sustain electrode pairs Y1 and Z1 and the address electrode X1 during discharge. The protective layer 57 serves to prevent damage to the upper dielectric layer 56 by sputtering of charged particles. As a result, the lifetime of the plasma display panel is extended and the emission efficiency of the secondary electrons is increased. As the protective layer 57, magnesium oxide (MgO) is usually used.

The address electrode X1 is formed to cross the sustain electrode pairs Y1 and Z1. The address electrode X1 is supplied with a data signal for selecting cells to be displayed.

The plasma display panel maintains the discharge by surface discharge between the pair of sustain electrodes Y1 and Z1 after the discharge cell is selected by the opposite discharge between the address electrode X1 and the scan / sustain electrode Y1. In the discharge cells of the plasma display panel, the phosphor 65 emits light by ultraviolet rays generated during the sustain discharge, so that visible light is emitted outside the cell. As a result, the plasma display panel displays an image in pixel units of discharge cells.

As described above, it can be seen that the plasma display panel having the electrode structure according to the present invention is the same in the laminated structure as the conventional three-electrode AC surface discharge type plasma display panel.

In fact, the plasma display panel including the scan / sustain electrode Y1 and the sustain electrode Z1 structures having different areas according to the present invention can be modified by modifying the patterns of the sustain electrode pair and the address electrode manufacturing mask without further processing. According to the fabrication process, the scan / sustain electrode Y1 and the sustain electrode Z1 may be patterned to have different areas.

Also, for this purpose, the transparent electrode 60a of the scan / sustain electrode 60 and the transparent electrode 59a of the sustain electrode 59 have different sizes in the length direction of the sustain electrode pairs 59 and 60. By patterning to have the scan / sustain electrode Y1 and the sustain electrode Z1 have different areas.

Furthermore, the plasma display panel according to the present invention includes not only the sustain electrode pairs Y1 and Z1 patterned to have different areas, but also address electrodes protruding in the longitudinal direction of the sustain electrode pairs Y1 and Z1. Also includes (X1).

In addition, the plasma display panel according to the present invention includes sustain electrode pairs Y1 and Z1 having an asymmetrical sustain pulse width.

6 to 10 are various embodiments of the plasma display panel including the electrodes X1, Y1, and Z1 described above, and the embodiments are not limited to one example, and may be implemented by a single or various combination. Can be.

6 is a plan view schematically illustrating a sustain electrode pair of a plasma display panel having an electrode structure according to an exemplary embodiment of the present invention.

In the plasma display panel having the electrode structure according to the exemplary embodiment of the present invention illustrated in FIG. 6A, each of the sustain electrode pairs 59 and 60 includes transparent electrodes 59a and 60a and metal electrodes 59b and 60b. Here, the sustain electrode pairs 59 and 60 are made up of the scan / sustain electrodes Y and 60 and the sustain electrodes Z and 59.

The metal electrodes 59b and 60b of the sustain electrode pairs 59 and 60 are formed of a highly conductive metal material, for example, silver (Ag) or copper (Cu).

In this case, the scan / sustain electrodes Y and 60 make the area of the region where the address electrode X intersect larger than that of the sustain electrodes Z and 59. This is because when the area of the scan / sustain electrodes Y and 60 becomes larger than the area of the sustain electrodes Z and 59, the discharge intensity per unit area decreases, so that the protective film on the scan / sustain electrode Y and 60 sides due to discharge is reduced. Deterioration can be reduced.

Therefore, the plasma display panel according to the present invention can increase the discharge efficiency in terms of panel design. In addition, when the ratio of the electrode area to the area of the discharge cell is reduced, the reactive power consumed for charging the capacitance between the electrodes is reduced, so that the plasma display panel employing the electrode having the small electrode area ratio consumes less power. Done.

In order to make the area of the scan / sustain electrodes Y and 60 larger than the areas of the sustain electrodes Z and 59, the upper portion of the partition wall which does not contribute to the discharge of the sustain electrodes Z and 59 is described below. The area of the scan / sustain electrodes Y and 60 is made larger than that of the sustain electrodes Z and 59 by patterning and removing.

The patterning may be performed by patterning at least one of an oval shape, a circular shape, a square shape, and a rectangular shape that cross the upper portion of the partition and the transparent electrode 59a of the sustain electrodes Z and 59.

FIG. 6A is a plan view of the transparent electrode 59a, which is an upper portion of the partition wall not contributing to the discharge of the sustain electrodes Z and 59, removed by oval pattern, and FIG. 6B is a circular pattern of the transparent electrode 59a. 6C is a plan view removed by patterning the transparent electrode 59a in a rectangular shape, and FIG. 6D is a plan view removed by patterning the transparent electrode 59a in a square shape, and FIG. 6E is the transparent electrode 59a. Is a plan view removed by patterning a rhombus.

Although not shown in FIG. 6, when the transparent electrodes 59a and 60a and the address electrode X1 are formed in a simple straight pattern as in the related art, an area where the address electrode X1 and the sustain electrode pairs 59 and 60 cross each other is formed. Since it is small, the discharge voltage rises or misdischarge (miswriting) occurs during address discharge. As a result, the address voltage gain can be reduced. This problem can be solved by modifying the shapes of the transparent electrodes 59a and 60a and the address electrode X1 by increasing the cross-sectional area of the address electrode X1 and the sustain electrode pairs 59 and 60.

An embodiment in which the shapes of the transparent electrodes 59a and 60a and the address electrode X1 are modified will be described in detail below.

7 is a plan view schematically illustrating a sustain electrode pair and an address electrode of a plasma display panel having an electrode structure according to an exemplary embodiment of the present invention.

In the plasma display panel having the electrode structure shown in FIG. 7A, each of the sustain electrode pairs 59 and 60 includes transparent electrodes 59a and 60a and metal electrodes 59b and 60b. Here, the sustain electrode pairs 59 and 60 are made up of the scan / sustain electrodes Y and 60 and the sustain electrodes Z and 59.

The metal electrodes 59b and 60b of the sustain electrode pairs 59 and 60 are formed of a highly conductive metal material, for example, silver (Ag) or copper (Cu).

Each of the transparent electrodes 59a and 60a protrudes from the metal electrodes 59b and 60b in a direction parallel to the partition wall 53 at both edges of the discharge cell.

When the shape of the transparent electrode 60a formed on the upper substrate when the plasma display panel is driven is formed in a simple straight pattern as in the related art, the address electrode 71 of the lower substrate and the scan / sustain electrodes Y and 60 of the upper substrate are transparent. At the portion that intersects with the electrode 60a, a write discharge occurs. As the write discharge occurs, the passivation layer MgO of the upper substrate, that is, the portion intersecting with the address electrode 71 of the lower substrate, continues to be damaged. In addition, after such write discharge occurs, damage is continuously caused by surface discharge. Of course, the overall damage to the protective film (MgO) of the upper substrate, the damage of the scan / sustain electrode (Y, 60), that is, the transparent electrode (60a) portion of the upper substrate is the largest. In addition, since the plasma generated during the surface discharge is concentrated at the center of the transparent electrode 60a, the damage is the greatest at the center of the transparent electrode 60a. If this damage is sustained, it is easy to lead to misfire. Therefore, in the present invention, the shape of the electrode of the upper substrate, that is, the transparent electrode 60a may be optimized as shown in FIG. 6A to minimize damage.

Therefore, as shown in the drawing, the center portion that is most damaged by the transparent electrode 60a is removed by patterning, thereby minimizing damage to the scan / sustain electrodes Y and 60 of the upper substrate.

In the plasma display panel having the electrode structure according to the exemplary embodiment of the present invention illustrated in FIG. 7B, each of the sustain electrode pairs 59 and 60 includes transparent electrodes 59a and 60a and metal electrodes 59b and 60b. Here, the sustain electrode pairs 59 and 60 become scan / sustain electrodes Y and 60 and the sustain electrodes Z and 59, and the address electrode 71 is formed to cross the sustain electrode pairs Y1 and Z1. do. The address electrode 71 is supplied with a data signal for selecting cells to be displayed.

The address electrode 71 shown in FIG. 7B protrudes in a direction intersecting with the transparent electrode 60a formed on the upper substrate during the driving of the plasma display panel among the pair of sustain electrodes 59 and 60 having the same area as the conventional address electrode. It is formed into a shape.

The write discharge occurs at a portion where the address electrode 71 of the lower substrate and the scan / sustain electrodes Y and 60 of the upper substrate cross each other, and as such a write discharge occurs, the write discharge intersects with the address electrode 71 of the lower substrate. The protective layer (MgO) of the portion to be continuously damaged. In addition, after such write discharge occurs, damage is continuously caused by surface discharge. Of course, the overall damage to the protective film (MgO) of the upper substrate, the damage of the scan / sustain electrode (Y, 60) portion of the upper substrate is the largest. If this damage is sustained, it is easy to lead to misfire.

Therefore, in the present invention, the shape of the electrode of the lower substrate, that is, the address electrode 71 can protrude in the longitudinal direction of the sustain electrode pairs 59 and 60. To this end, it protrudes at a site intersecting with the scan / sustain electrode 60, protrudes at a site intersecting with the sustain electrode 59, or the scan / sustain electrode 60 and the sustain electrode 59. ) May protrude in the lengthwise direction of the sustain electrode pairs 59 and 60 at a portion that does not cross.

7B to 7D illustrate an example in which the above-described address electrode 71 protrudes, and will be described in detail below.

FIG. 7B illustrates the shape of the address electrode 71 protruding in the longitudinal direction of the pair of sustain electrodes 59 and 60 at a portion crossing the scan / sustain electrode 60 of the upper substrate, and FIG. 7C shows a scan of the upper substrate. Fig. 7D shows the shape of the address electrode 71 protruding in the longitudinal direction of the sustain electrode pairs 59 and 60 at the intersection with the sustain electrode 60 and the sustain electrode 59, and Fig. 7D shows the scan of the upper substrate. Lengths of the pairs of sustain electrodes 59 and 60 at portions intersecting with the sustain electrodes 60, portions intersecting with the sustain electrodes 59, and portions not intersecting with the scan / sustain electrodes 60 and the sustain electrodes 59. The shape of the address electrode 71 which protruded in the direction is shown.

The shape of the address electrode 71 becomes larger as the area intersecting with the scan / sustain electrode pairs 59 and 60 and the area of discharge of the address electrode 71 becomes wider, resulting in a faster timing of writing discharge. . Therefore, the overall reliability of the plasma display panel can be improved.

8 is a plan view schematically illustrating a plasma display panel having a general electrode structure.

In the plasma display panel having the general electrode structure shown in FIG. 8A, each of the sustain electrode pairs 59 and 60 includes transparent electrodes 59a and 60a and metal electrodes 59b and 60b. Here, the sustain electrode pairs 59 and 60 become scan / sustain electrodes Y and 60 and the sustain electrodes Z and 59, and the address electrode 71 is formed to cross the sustain electrode pairs Y1 and Z1. do. The address electrode 71 is supplied with a data signal for selecting cells to be displayed.

FIG. 8B is a waveform diagram showing a pulse waveform of a plasma display panel having a general electrode structure, wherein initial sustain discharge starts on the scan / sustain electrodes Y and 60 during surface discharge. In this case, as shown in FIG. 8B, the Y pulse undergoes a large impedance change in a condition that discharge occurs in an off cell, that is, an off capacitance. In the absence of an additional driving circuit, the Y pulse is severely damped ( damping). This damping phenomenon causes the charge / discharge of the capacitance to become unstable, so that the discharge gain becomes poor, which acts as a factor that causes the discharge voltage and the efficiency to decrease.

FIG. 8C is a distribution diagram showing wall charge distribution of a plasma display panel having a general electrode structure. As shown in FIG. 8, wall charges are not distributed in the same amount on the transparent electrodes 59a and 60a. As the range of the wall charge distribution distributed on the transparent electrode 60a of the scan / sustain electrode 60 becomes wider, it takes time to rise from the initial voltage to the discharge start voltage, which causes a discharge jitter. do.

9 to 10 are plan views schematically illustrating a plasma display panel having an electrode structure according to an exemplary embodiment of the present invention.

9 is a plan view schematically illustrating a plasma display panel having an asymmetric sustain pulse width according to an embodiment of the present invention.

In the plasma display panel having the asymmetrical sustain pulse width shown in FIG. 9A, each of the sustain electrode pairs 59 and 60 includes transparent electrodes 59a and 60a and metal electrodes 59b and 60b. Here, the sustain electrode pairs 59 and 60 become scan / sustain electrodes Y and 60 and the sustain electrodes Z and 59, and the address electrode 71 is formed to cross the sustain electrode pairs Y1 and Z1. do. The address electrode 71 is supplied with a data signal for selecting cells to be displayed.

The present invention includes sustain electrode pairs (59, 60) having an asymmetrical sustain pulse width, and in order to have an asymmetric sustain pulse width, the sustain electrode pairs (59, 60) are provided. The size of the transparent electrode 60a of the scan / sustain electrode 60 is smaller than that of the transparent electrode 59a of the sustain electrode 59, and the gap between the transparent electrodes 59a and 60a is In order to maintain a predetermined distance, the size of the transparent electrode 59a is increased by reducing the size of the transparent electrode 59a to have an asymmetric electrode structure maintaining a predetermined gap. The gap is different depending on the manufacturer, but the predetermined value of any one selected from 80 μm to 100 μm is used, and the size of the transparent electrode 60a of the scan / sustain electrode 60 is reduced according to the frequency of the driving voltage. Can be limited.

This asymmetric pulse width and electrode structure can reduce the damping phenomenon and the discharge delay in the plasma display panel.

FIG. 9B is a waveform diagram illustrating a pulse waveform of a plasma display panel having an asymmetrical sustain pulse width, and the size of the transparent electrode 60a of the scan / sustain electrodes Y and 60 during surface discharge is determined by the transparent electrode of the sustain electrode 59. The damping phenomenon generated in the Y pulse can be reduced by making it smaller than the size of 59a. As the damping phenomenon is reduced, the charge / discharge of the capacitance becomes more stable, so that the discharge gain becomes good, which can lead to an increase in discharge voltage and efficiency.

FIG. 9C is a distribution chart showing wall charge distribution of a plasma display panel having an asymmetrical sustain pulse width. As shown, wall charges are not distributed in the same amount on the transparent electrodes 59a and 60a. If the range of the wall charge distribution distributed on the transparent electrode 60a of the scan / sustain electrode 60 is shortened, the time to rise from the initial voltage to the discharge start voltage is shortened, thereby reducing the discharge delay.

10 is a plan view schematically illustrating a plasma display panel having an asymmetric sustain pulse width according to an embodiment of the present invention.

In the plasma display panel having the asymmetrical sustain pulse width shown in FIG. 10A, each of the sustain electrode pairs 59 and 60 includes transparent electrodes 59a and 60a and metal electrodes 59b and 60b. Here, the sustain electrode pairs 59 and 60 become scan / sustain electrodes Y and 60 and the sustain electrodes Z and 59, and the address electrode 71 is formed to cross the sustain electrode pairs Y1 and Z1. do. The address electrode 71 is supplied with a data signal for selecting cells to be displayed.

In order to have an asymmetrical sustain pulse width, the size of the transparent electrode 60a of the scan / sustain electrode 60 of the sustain electrode pairs 59 and 60 is set to the transparent electrode 59a of the sustain electrode 59. The size of the transparent electrode 59a is increased by reducing the size of the transparent electrode 59a so that the gap between the transparent electrodes 59a and 60a is smaller than the size of the transparent electrode 59a. In order to have an asymmetric electrode structure maintaining a predetermined gap, the shape of the transparent electrode 59a of the sustain electrode 59 is protruded to reduce the damping phenomenon that may occur in the Z pulse. Similar to the above, the gap is different for each manufacturer, but the predetermined value of any one selected from 80 μm to 100 μm is used, and the size of the transparent electrode 60a of the scan / sustain electrode 60 is determined by the driving voltage. Depending on the frequency, the reduction size can be limited.

This asymmetric pulse width and electrode structure can reduce the damping phenomenon and the discharge delay in the plasma display panel.

FIG. 10B is a waveform diagram illustrating a pulse waveform of a plasma display panel having an asymmetrical sustain pulse width, wherein the size of the transparent electrode 60a of the scan / sustain electrodes Y and 60 during surface discharge is determined by the transparent electrode of the sustain electrode 59. The damping phenomenon generated in the Y pulse can be reduced by making it smaller than the size of 59a. As the damping phenomenon is reduced, the charging / discharging of the capacitance becomes more stable, so that the discharge gain becomes good, which leads to an increase in the discharge voltage and the efficiency, and also the damping phenomenon that may occur in the Z pulse.

FIG. 10C is a distribution chart showing wall charge distribution of a plasma display panel having an asymmetrical sustain pulse width. As shown in the drawing, wall charges are not distributed in the same amount on the transparent electrodes 59a and 60a. If the range of the wall charge distribution distributed on the transparent electrode 60a of the scan / sustain electrode 60 is shortened, the time to rise from the initial voltage to the discharge start voltage is shortened, thereby reducing the discharge delay.

The above embodiment is an example for explaining the technical idea of the present invention in detail, and the present invention is not limited to the above embodiment, various modifications and combinations are possible, and various embodiments of the technical idea are all present invention Naturally, it belongs to the protection scope of.

The plasma display panel according to the present invention as described above can minimize the damage to the scan / sustain electrode (Y) of the upper substrate.

In addition, since the intensity of discharge per unit area of the scan / sustain electrode Y is lowered to reduce the deterioration phenomenon, the area that intersects the transparent electrode of the scan / sustain electrode Y becomes wider, thereby causing write discharge. The timing of is relatively faster.

The plasma display panel according to the present invention not only reduces the deterioration phenomenon by lowering the discharge intensity per unit area of the scan / sustain electrode (Y) during sustain discharge. The discharge delay may be reduced by confining wall charge on the scan / sustain electrode Y, and the asymmetric pulse width may be formed to reduce the loss due to damping, thereby forming stable discharge. have.

Therefore, there is an effect that can improve the overall reliability of the plasma display panel.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (14)

In the plasma display panel comprising a sustain electrode pair and an address electrode (X) composed of a scan / sustain electrode (Y) and a sustain electrode (Z), And the scan / sustain electrode (Y) and the sustain electrode (Z) are patterned to have different areas. The method of claim 1, wherein the sustain electrode pair, And the area of the transparent electrode of the scan / sustain electrode (Y) and the area of the transparent electrode of the sustain electrode (Z) are different from each other. The method according to claim 1 or 2, wherein the sustain electrode pair, And the area of the transparent electrode of the scan / sustain electrode (Y) is larger than the area of the transparent electrode of the sustain electrode (Z). The method of claim 1 or 2, wherein the transparent electrode of the sustain electrode (Z), And an area intersecting the upper portion of the partition wall is removed by patterning. The method of claim 4, wherein the patterning, And patterning at least one of an oval shape, a circular shape, a square shape, and a rectangular shape at a portion where the upper portion of the partition and the transparent electrode of the sustain electrode Z cross each other. The method of claim 1, wherein the sustain electrode pair, The area of the transparent electrode of the sustain electrode (Z) is larger than the area of the transparent electrode of the scan / sustain electrode (Y). The method of claim 6, wherein the transparent electrode of the scan / sustain electrode (Y), And the center portion of the portion crossing the address electrode (X) is removed by patterning. The method of claim 1, wherein the address electrode (X), And a protrusion protruding in the longitudinal direction of the sustain electrode pair. The method of claim 8, wherein the address electrode (X), And a protruded portion at the intersection with the scan / sustain electrode (Y). The method of claim 8, wherein the address electrode (X), And a protrusion protruding from the intersection with the sustain electrode (Z). The method of claim 8, wherein the address electrode (X), And a protrusion protruding from a portion not intersecting the scan / sustain electrode (Y) and the sustain electrode (Z). In the plasma display panel comprising a sustain electrode pair and an address electrode (X) composed of a scan / sustain electrode (Y) and a sustain electrode (Z), A plasma display panel comprising a pair of sustain electrodes having an asymmetrical sustain pulse width. The method of claim 12, wherein the sustain electrode pair, And the area of the transparent electrode of the scan / sustain electrode (Y) is smaller than the area of the transparent electrode of the sustain electrode (Z). The method of claim 13, wherein the asymmetric structure of the sustain electrode pair, And asymmetrical structure in which a gap between the transparent electrode of the scan / sustain electrode (Y) and the transparent electrode of the sustain electrode (Z) is maintained at a predetermined distance.

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