KR100755313B1 - The plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel, wherein the spacing between the sustain electrode pairs of the effective discharge region and the sustain electrode pair spacing of the invalid discharge region are different from each other. An impurity of? May adhere to the sustain electrode of the ineffective region to eliminate the occurrence of erroneous discharge in the effective discharge region.

Plasma Display Panel, ITO, Transparent Electrode, Electrode Spacing

Description

 Plasma Display Panel {The plasma display panel}

1 is a diagram showing the structure of a plasma display panel;

2 is a front view of a plasma display panel according to the prior art;

3A to 3I illustrate the structure of a plasma display panel according to the present invention.

<Explanation of symbols on main parts of the drawings>

100: front substrate 110: bus electrode

120: transparent electrode 200: back substrate

220: bulkhead

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel. In particular, the spacing between the sustain electrode pairs of the ineffective discharge region of the plasma display panel is wider than the spacing between the sustain electrode pairs of the effective discharge region. The present invention relates to a plasma display panel capable of eliminating erroneous discharge generation in an effective discharge region as foreign matter adheres to a sustain electrode.

As shown in FIG. 1, a general plasma display panel includes a front substrate 10 and a rear substrate 20, and the front substrate 10 is formed in a plurality of stripe-shaped arrays facing the rear substrate 20. Two bus electrodes 11 and a transparent electrode 12, a dielectric layer 13 stacked to cover the bus electrodes to limit discharge current during discharge and to facilitate generation of wall charges, and a dielectric protection for protecting the dielectric layer Layer 14.

In addition, the rear substrate 20 is arranged in a stripe shape so as to be orthogonal to the bus electrode 11 of the front substrate, the plurality of address electrodes 21 for dividing the entire screen into a plurality of cells together with the display electrode, and the rear substrate. A dielectric layer 23 applied to the entire surface of the dielectric layer to protect the address electrode and to perform electrical insulation; a partition wall 22 formed in a stripe shape on the dielectric layer to form a discharge space; and a discharge formed by the partition wall. It is made of a phosphor 24 which is printed and applied inside the space and excited by ultraviolet rays during the discharge of each cell to emit visible light.

In this case, as illustrated in FIG. 2, the plasma display panel includes an exhaust tip T so that impurities inside the plasma display panel are discharged at the outermost portion of the plasma display panel. Impurities that cannot be released to the outside of the panel may remain, causing contamination of the cells.

In order to prevent this, a pollution prevention cell D is formed outside the effective discharge area A on which the screen is displayed on the plasma display panel, thereby inducing pollution generated by the impurities that have not been discharged.

However, since the bus electrode 11 and the transparent electrode 12 are not formed in the ineffective discharge region B in which the antifouling cell D is formed, impurities present in the antifouling cell are effective discharge region A. Of the discharge cells, causing false discharge such as bright spots and blinks.

In particular, metal impurities such as Pb, Ca, and Na must adhere to the dielectric layer 13 made of MgO to reduce the surface resistance of the dielectric layer, thereby canceling wall charges during discharge, causing unlitness, and increasing the driving voltage for causing the discharge. There is a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and the spacing between the sustain electrode pairs of the ineffective discharge region is wider than the spacing between the sustain electrode pairs of the effective discharge region, and thus exists in the plasma display panel during discharge. The present invention provides a plasma display panel capable of eliminating erroneous discharge generation in an effective discharge region as impurities are attached to the sustain electrodes of the ineffective discharge region.

The plasma display panel according to the present invention for solving the above problems is divided into an effective discharge region in which the discharge for image display is performed, and an invalid discharge region that forms the outer edge of the effective discharge region, and within the invalid discharge region. As the spacing of the sustain electrode pairs of the at least one cell is formed longer than the spacing of the sustain electrode pairs of the at least one cell in the effective discharge region, an unwanted false discharge can be prevented by increasing the sustain discharge start voltage in the ineffective discharge region. You can prevent it.
Preferably, the sustain electrode pair spacing of the ineffective discharge region is formed to be 1.5 times or more wider than the sustain electrode pair spacing of the effective discharge region.
In addition, the area of the sustain electrode formed in the discharge cell proximate to the effective discharge area among the plurality of discharge cells in the ineffective discharge area is smaller than the area of the sustain electrode formed in the discharge cell not proximate to the effective discharge area. This can prevent light from leaking into the effective discharge region.

Hereinafter, a plasma display panel of the present invention will be described with reference to the accompanying drawings. 3A to 3G illustrate the structure of a plasma display panel according to the present invention.

In the plasma display panel according to the present invention, sustain electrode pairs 121 and 122 including a bus electrode and a transparent electrode for performing surface discharge are formed on the front substrate 100, and a dielectric layer and a dielectric protective layer are formed on the sustain electrode. It is formed in turn.

The back substrate 200 is formed with an address electrode for selecting a discharge cell according to the image data, and a partition wall 220 for partitioning the dielectric layer and the discharge space on the address electrode.

The plasma display panel is formed outside the effective discharge region A and the effective discharge region in which a screen is displayed according to image data, and prevents impurities which do not escape to the exhaust tip during the exhaust process from being deposited on the dielectric layer of the effective discharge region. Therefore, there is an ineffective discharge region B in which the pollution prevention cell D is formed so as to stably discharge in the effective discharge region.

In the plasma display panel of the present invention, sustain electrodes 121 and 122 are formed in both the effective discharge region A and the ineffective discharge region B. In the plasma display panel of the present invention, the sustain electrodes of the effective discharge region ( 121) The spacing between the pairs and the spacing between the pair of sustain electrodes 122 in the ineffective discharge region are formed differently.

As shown in FIG. 3A, the spacing S _{2 of the} pair of sustain electrodes 122 of the ineffective discharge region B is formed to be wider than the spacing S _{1 of the} pair of sustain electrodes 121 of the effective discharge region A. FIG. Should be.

As described above, when the interval S ₂ between the pair of sustain electrodes 122 in the ineffective discharge region B is formed to be wider than the interval S ₁ between the pair of sustain electrodes 121 in the effective discharge region A, discharge occurs. Since the required driving voltage is increased, discharge occurs in both the invalid discharge region and the effective discharge region during an aging process for applying a high voltage, and contaminants are induced to the sustain electrode of the invalid discharge region. .

On the other hand, when driving a typical plasma display panel which displays a screen by applying a driving voltage of 170V to 180V, no discharge occurs in the ineffective discharge region B. FIG.

In the exhaust process, metal impurities such as Pb, Na, and Ca are discharged to the exhaust tip. Since the impurities are mainly collected at the end of the sustain electrode, a large amount of impurities are gathered around the exhaust tip. Even when the impurities are not completely discharged during the exhaust process, the sustain electrode 122 of the ineffective discharge region B during the aging process may be collected. ), Impurities not released in the exhaust process are fixed.

In general, when the interval between the sustain electrodes 121 and 122 is widened, the driving voltage for causing the discharge must be increased. As described above, the interval S ₂ of the sustain electrode 122 of the ineffective discharge region B is the effective discharge region A. If the sustain electrode 121 is formed to be wider than the interval S ₁ , the sustain electrode of the ineffective discharge region is discharged only during the aging process.

The driving voltage for discharging in the plasma display panel is in the range of 170V to 180V, and during the aging process, a high voltage of 250V or more is applied to cause the discharge.

In general, the interval S ₁ between the pair of sustain electrodes 121 of the effective discharge region A is formed between 60 μm and 90 μm, so the interval S between the pair of sustain electrodes 122 of the ineffective discharge region B is inferior. ₂ ) should be wider than the gap between the sustain electrode pairs of the effective discharge region to generate a discharge only during the aging process and not to generate a discharge when the plasma display panel is driven to display a screen.

If the distance S ₂ between the pair of sustain electrodes 122 of the invalid discharge region B is too narrow, a discharge occurs even when the plasma display panel is driven to display a screen, and thus, The spacing between the pair of sustain electrodes provided must be 1.5 times or more wider than the spacing S ₁ of the sustain electrode 121 of the effective discharge region A so that discharge occurs only when a high voltage of 250V or more is applied, such as an aging process.

In addition, when the interval S ₂ of the sustain electrode 122 of the ineffective discharge region B becomes too wide, the driving voltage for causing the discharge becomes too high, so that discharge does not occur during the aging process, and thus the sustain of the ineffective discharge region B is maintained. It is preferable that the electrode gap does not exceed five times the interval S ₁ of the sustain electrode 121 of the effective discharge region A. FIG.

In general, when the vertical width of the sustain electrode is increased, the capacitance increases, thereby lowering the driving voltage. Therefore, the vertical width V ₂ of the sustain electrode 122 of the ineffective discharge region B is determined by the effective discharge region ( It should be formed narrower than the vertical width V ₁ of the sustain electrode 121 of A).

In particular, the area of the sustain electrode 122 formed in the discharge cell D ₁ in contact with the effective discharge area A among the discharge cells D of the ineffective discharge area B is smaller than the sustain electrode area of the other discharge cells. When formed, the driving voltage required to cause the discharge is further increased, so that discharge does not occur in the discharge cells in contact with the effective discharge region when driving the plasma display panel, thereby preventing the discharge of the effective discharge region from being weakened.

Further, when the plasma display panel is driven to discharge in the effective discharge region A, particles generated during discharge in the outermost discharge cell D 'of the effective discharge region are discharged in the invalid discharge region B. FIG. Preventing the cell D from falling into the discharge cell D ₁ in contact with the effective discharge area A and preventing discharge from occurring in the discharge cell in contact with the effective discharge area among the discharge cells in the ineffective discharge area. do.

This is because if the area of the sustain electrode 122 of the discharge cell D ₁ in contact with the effective discharge area A is small among the discharge cells of the ineffective discharge area B, the plasma display panel may be accumulated on the sustain electrode when the plasma display panel is driven. Since the wall charge can be limited, the discharge is not made.

As shown in FIG. 3B, the width H ₂ of the sustain electrode 122 of the ineffective discharge region B is greater than the width H ₁ of the sustain electrode 122 of the effective discharge region A. FIG. At the same time, the vertical width V ₂ of the sustain electrode of the ineffective discharge region may be smaller than the vertical width V ₁ of the sustain electrode of the effective discharge region.

As described above, the horizontal width H ₂ and the vertical width V _{2 of} the sustain electrode 122 formed in the ineffective discharge region B are horizontal in the sustain electrode 121 formed in the effective discharge region A. FIG. When the width H ₁ and the vertical width V ₁ are smaller than the width H ₁ and the vertical width V ₁ , the sustain electrode area of the invalid discharge area becomes smaller than the sustain electrode area of the effective discharge area. As the wall charges accumulated on the sustain electrodes of the electrode become smaller than the wall charges accumulated on the sustain electrodes of the effective discharge region, even if the discharge occurs in the ineffective discharge region, the discharge is weakly performed so that the screen display is not affected.

As shown in FIG. 3C, the width H ₂ of the sustain electrode 122 formed in the ineffective discharge region B is the width of the sustain electrode 121 formed in the effective discharge region A. FIG. The sustain electrode 122a formed smaller than (H ₁ ) and formed above the ineffective discharge region is formed longer than the sustain electrode 122b formed below, and formed below the ineffective discharge region. The vertical width V ₂ may form the sustain electrode by varying the lengths of the upper and lower portions of the sustain electrode formed in the ineffective discharge region so as to be shorter than the vertical width V ₁ of the sustain electrode in the effective discharge region. have.

In general, since the discharge occurs on the partition wall 220 side, the sustain electrode 122 formed at the upper end and the lower end of the cell formed in the ineffective discharge region B is different, and thus the sustain electrode formed at the upper end or the lower end. When the vertical width of V ₂ is shorter than the other one, the discharge generated near the horizontal partition wall 220b of the lower end of the cell where the short vertical sustain electrode is formed is diffused toward the sustain electrode, so that the discharge is weakly performed. .

Like the effective discharge region A, an opening may be formed at a portion where the sustain electrode 122 formed in the ineffective discharge region B and the partition wall 220 cross each other. As shown in FIG. 3D, an opening is formed at a portion where the sustain electrode formed in the ineffective discharge region intersects the partition wall, and the widths of the upper end and the lower end of the opening may be different.

At this time, since the interval S ₂ of the sustain electrodes 122 of the ineffective discharge region B becomes wider than the interval S ₁ of the sustain electrodes 121 of the effective discharge region A, the sustain electrode area of the ineffective discharge region B is wider. Smaller than the sustain electrode area of the effective discharge region, wall charges are limited and no discharge occurs.

That is, when the area of the sustain electrode 120 is small, the driving voltage for driving the plasma display panel must be high, so that the area of the sustain electrode 122 of the ineffective discharge region B is the sustain electrode of the effective discharge region A. Since it is smaller than the area (121), the driving voltage required for the discharge in the invalid discharge region is increased than the driving voltage in the effective discharge region, so that discharge does not occur in the invalid discharge region.

At this time, the area of the sustain electrode 122 formed in the discharge cell D ₁ in contact with the effective discharge area A among the discharge cells of the ineffective discharge area B must be smaller than the sustain electrode area of the other discharge cells. do.

As shown in FIG. 3E, the sustain electrode 122 formed in the discharge cell D ₁ in contact with the effective discharge area A among the discharge cells of the ineffective discharge area B is vertically toward the outside of the plasma display panel. It can be formed to reduce the width.

In this case, since the interval between the sustain electrodes 122 formed in the discharge cells D ₁ of the ineffective discharge region B in contact with the effective discharge region A increases as the edges of the plasma display panel increase, the discharge cells Since the driving voltage must be increased in order to discharge the battery at (D ₁ ), the discharge is not performed at a voltage of about 180V applied to display the screen on the plasma display panel.

As shown in FIGS. 3F and 3G, an opening may be formed at a position opposite to the discharge cell of the sustain electrode 122 formed in the ineffective discharge region B. FIG.

In this case, the width W of the opening may be wider or narrower than the width of the discharge cell D formed in the ineffective discharge region, and thus the shape of the opening is not limited thereto. Specify it.

When an opening is formed in the discharge cell D of the sustain electrode 122 of the ineffective discharge region B, the sustain electrode in which the sustain electrode area formed in the ineffective discharge region is formed in the effective discharge region A is formed. The wall charges that are smaller than the area (121) may accumulate on the sustain electrodes of the ineffective discharge region B are limited, and in particular, discharges formed on the partition walls 220 are diffused, so that weak discharges are generated in the discharge cells D. Occurs or discharge is not performed.

In addition, a plurality of small holes may be formed in the sustain electrode 122 formed in the ineffective discharge region B, as shown in FIG. 3H.

Since the sustain electrode 120 has a very thin thickness of about 1000 kPa to 2000 kPa, sheet resistance is formed in proportion to the area. When a plurality of small holes are formed in the sustain electrode 122 formed in the ineffective discharge region B, the hole is formed. As a result, the surface area of the sustain electrode is reduced by decreasing the sustain electrode area.

Therefore, when the sheet resistance of the sustain electrode 122 is reduced, it is possible to reduce the power consumed by the sustain electrode.

As shown in FIG. 3I, the width H of the sustain electrode 122 formed in the ineffective discharge region B may be formed to be thicker toward the outer edge of the plasma display panel.

At this time, the first three or four discharge cells D ₁ to D ₃ of the discharge cells D in the ineffective discharge region B, which overlap the effective discharge region A, are discharged in the effective discharge region A. Since the particles generated by the discharge are transferred, the discharge is likely to occur, so that the width of the three or four cells in contact with the effective discharge area A does not exceed 50% of the width of the discharge cell so that the sustain electrode 122 ) Area can be reduced.

In addition, in the case of the discharge cells D ₄ to D ₉ of the ineffective discharge region B, except for the _three or four cells D ₁ to D _{3 in} contact with the effective discharge region A, the ratio is the same as in the fourth embodiment. An opening is formed at a portion where the sustain electrode 122 and the partition wall 220 intersect each other in the effective discharge region, and the widths of the upper end and the lower end of the opening may be different.

For example, the width H ₁ of the sustain electrode 122 of the first discharge cell D ₁ of the ineffective discharge region B in contact with the effective discharge region A is formed to be 60 μm, and subsequent discharges are formed. The widths of the cells (H ₂ , H ₃ ) are 90 μm and 120 μm, respectively. For the other discharge cells, the width of the upper part of the sustain electrode is 100 μm and the lower part is 150 μm, which is the same as the width of the discharge cell. It can be formed at ~ 160㎛.

That is, the discharge cells D ₁ to D ₃ of the ineffective discharge region B, which are affected by the effective discharge region A, narrow the sustain electrode 122 area to form other discharge cells D ₄ to D _9. By limiting the wall charge more than), the sustain electrode area around the exhaust tip is narrower than the discharge cell in contact with the effective discharge area without being influenced by the discharge of the effective discharge area so that more impurities can be fixed.

As described above, in the plasma display panel of the present invention, impurities which are not discharged to the exhaust tip during the exhaust process are adhered to the sustain electrode 122 formed in the ineffective discharge region B during the aging process, so that the plasma display panel is not exhausted when the plasma display panel is driven. Impurities that do not adhere to the surface of the dielectric layer formed in the effective discharge region A may be prevented from losing the wall charges formed during discharge, thereby stabilizing the discharge voltage, thereby enhancing the discharge of the effective discharge region.

In particular, the interval S _{2 of} the sustain electrodes 122 formed in the ineffective discharge region B is wider than the interval S ₁ of the sustain electrodes 121 in the effective discharge region A, so that the ratio is not generated when driving the plasma display. The discharge is not performed in the effective discharge region, although the area of the sustain electrode formed in the invalid discharge region is smaller than the sustain electrode area of the effective discharge region, so that the sustain electrode is discharged even if the discharge occurs in the invalid discharge region B. Because the wall charges that can accumulate in the wall are limited, a weak discharge is performed, which does not affect the screen display.

As described above, the plasma display panel according to the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed herein, and those skilled in the art within the scope of the technical idea of the present invention are protected. Application is possible.

In the plasma display panel according to the present invention configured as described above, the sustain electrode gap of the invalid discharge region existing outside the effective discharge region of the plasma display panel is wider than the sustain electrode interval of the effective discharge region. Foreign matter present in the plasma display panel is attached to the sustain electrode of the ineffective discharge region, and no discharge occurs in the ineffective discharge region when the plasma display panel is driven. Not only can it be prevented from being weakened, but also it is possible to eliminate the occurrence of erroneous discharges such as bright spots and tail lights in the effective discharge region, as well as to improve the discharge vulnerability around the exhaust port of the plasma display panel.

Claims (12)

The panel region is divided into an effective discharge region in which discharge for image display is performed, and an invalid discharge region forming an outer portion of the effective discharge region. And the spacing of the sustain electrode pairs of at least one cell in the ineffective discharge region is longer than the spacing of the sustain electrode pairs of at least one cell in the effective discharge region. The method of claim 1, And the sustain electrode pair spacing of the ineffective discharge region is formed to be 1.5 times or more wider than the sustain electrode pair spacing of the effective discharge region. The method of claim 1, And the width or length of the sustain electrode of the ineffective discharge region is smaller than the width and length of the sustain electrode of the effective discharge region. The method of claim 1, And a vertical width of the upper end portion of the sustain electrode in the ineffective discharge region and a vertical width of the lower end portion are different from each other. The method of claim 1, And an opening is formed in the sustain electrode of the ineffective discharge region corresponding to the discharge cell. The method of claim 5, And the width of the opening is greater than the width of the discharge cells formed in the ineffective discharge region. The method of claim 1, And an opening is formed in the sustain electrode formed in the ineffective discharge region at a portion where the sustain electrode and the partition wall intersect. The method of claim 7, wherein And the widths of the upper and lower ends of the openings are different from each other. The method of claim 1, The width of the sustain electrode of the ineffective discharge region is formed thicker toward the outside of the plasma display panel. The method of claim 9, And the width of the sustain electrode in the ineffective discharge region does not exceed the width of the discharge cells. delete The method of claim 1, And a plurality of holes are formed in the sustain electrode of the ineffective discharge region.

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