KR20060087635A - Plasma display panel - Google Patents

Abstract

A plasma display panel is disclosed. The present invention provides a battery comprising: a first panel having a plurality of first discharge electrodes disposed thereon; a second panel having a second discharge electrode addressed with the first discharge electrode; and a first panel disposed between the first and second panels. A partition wall defining a cell; and a red, green, and blue phosphor layer applied in the discharge cell; the gap a of the second discharge electrode disposed in the adjacent discharge cell; and the width of the second discharge electrode ( b) satisfies 0.4 < a / b < 2.5 to prevent erroneous discharge during addressing discharge. As a result, the discharge can be stabilized.

Description

Plasma display panel {Plasma display panel}

1 is a cross-sectional view showing a discharge cell of a conventional plasma display panel;

2 is a configuration diagram of a plasma display panel according to an embodiment of the present invention;

3 is an exploded perspective view illustrating a portion of the plasma display panel of FIG. 2;

4 is a plan view illustrating a state in which the discharge electrode of FIG. 3 is disposed;

5 is a waveform diagram of signals applied to an electrode line of FIG. 4.

<Brief description of symbols for the main parts of the drawings>

300 ... plasma display panel 310 ... front panel

311 ... Front board 312 ... X electrode

313 ... Y electrode 314 ... M electrode

316 ... front dielectric layer 360 ... back panel

361 ... backplane 362 ... address electrode

362a ... Address electrode line 362b ... Area enlargement

363 back dielectric layer 364 bulkhead

365 ... phosphor layer

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 in which a width of an address electrode and a distance between an adjacent pair of address electrodes are limited to a specific value.

In general, a plasma display panel injects and discharges a discharge gas between two substrates on which a plurality of discharge electrodes are formed, and excites the fluorescent material of the phosphor layer by the generated ultraviolet rays, thereby causing desired numbers and letters. Or a flat display device for implementing graphics.

Such a plasma display panel may be classified into a direct current type and an alternating current type according to a type of driving voltage applied to a discharge cell, for example, a discharge type, and may be classified into a counter discharge type and a surface discharge type according to the configuration of the electrodes.

Referring to FIG. 1, the conventional three-electrode surface discharge plasma display panel 100 is alternately disposed on the front substrate 101, a rear substrate 102 disposed in parallel with the front substrate 101, and an inner surface of the front substrate 101. The X and Y electrodes 103 and 104, the front dielectric layer 105 filling the X and Y electrodes 103 and 104, and the protective film layer 106 deposited on the surface of the front dielectric layer 105. And an address electrode 107 formed on an inner surface of the rear substrate 102 and disposed in a direction crossing the X and Y electrodes 103 and 104, and a back dielectric layer filling the address electrode 107. 108, a partition wall 109 disposed on the rear dielectric layer 108, and a red, green, and blue phosphor layer 110 applied to the inner side of the partition wall 109.

The operation of the plasma display panel 100 having the above structure will be briefly described. An electric signal is applied to the Y electrode 104 and the address electrode 107 to select a discharge cell, and then the X and Y electrodes 103 and 104. ) Alternately applies an electrical signal to surface discharge from the surface of the front substrate 101 to generate ultraviolet rays, and emits visible light from the phosphor layer 110 of the selected discharge cell, thereby realizing a still image or a moving image.

In recent years, as the flat panel display device is enlarged by the demand of the consumer, the plasma display panel 100 includes a multi-electrode having a separate discharge electrode interposed between discharge gaps between the plurality of X and Y electrodes 103 and 104. By adopting the structure, a structure that can improve the brightness by generating a long gap discharge between the X and Y electrodes 103 and 104 is under development.

At this time, it is required to design the width of the address electrode 107 causing the addressing discharge or the interval between the pair of address electrodes 107 arranged in the adjacent discharge cell to have a specific value so that the addressing discharge can be generated properly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and in the panel having a multi-electrode provided with separate discharge electrodes between the X and Y electrodes causing display sustain discharge, the width or spacing of the address electrodes causing addressing discharge to a specific value. It is an object of the present invention to provide a plasma display panel which is limited to prevent the erroneous discharge of the addressing discharge.

In order to achieve the above object, the plasma display panel according to an aspect of the present invention,

A first panel on which a plurality of first discharge electrodes are disposed;

A second panel on which a second discharge electrode is disposed, the second discharge electrode being addressed;

A partition wall disposed between the first and second panels to define a discharge cell;

And a red, green, and blue phosphor layer coated in the discharge cell.

A plasma display panel, wherein a distance a of the second discharge electrodes disposed in the adjacent discharge cells and a width b of the second discharge electrodes satisfy the following equation.

Equation

0.4 ≤ a / b ≤ 2.5

Where a is the interval between adjacent second discharge electrodes and b is the width of each second discharge electrode.

The second discharge electrode may include a strip-shaped discharge electrode line arranged in one direction of the second panel, and a discharge enlargement unit integrally extending from the discharge electrode line into each discharge cell.

In addition, the discharge expanding portion is characterized in that the rectangular shape.

Furthermore, the first discharge electrode may include X and Y electrodes alternately arranged in a direction crossing the first discharge electrode, and an M electrode disposed in a discharge gap between the X and Y electrodes.

In addition, a trigger discharge voltage is applied between the X and M electrodes, and a sustain discharge voltage is applied between the X and Y electrodes.

In addition, the partition wall has a first partition wall disposed in one direction of the panel and the second partition wall disposed in the other direction of the panel, the first partition wall facing the inner wall of the pair of adjacent second partition wall Extend so as to form a delta discharge cell.

In addition, the second discharge electrodes are arranged to be spaced apart from each other by a predetermined interval in a direction parallel to the second partition walls, and each discharge electrode is integral with each of the discharge electrode lines of a strip type extending from an overlapping position with the second partition walls. And an enlarged discharge portion formed in each discharge cell.

Hereinafter, a plasma display panel according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a plasma display device 200 employing a surface discharge plasma display panel 300 employing four electrodes according to an embodiment of the present invention.

Referring to the drawings, the plasma display apparatus 200 includes a plasma display panel 300, an image processor 201, a logic controller 202, an X driver 204, a Y driver 205, and an M driver. (206).

The image processor 201 processes an external image signal to generate an internal image signal including red, green, and blue digital image data, a clock signal, and vertical and horizontal synchronization signals. The logic controller 202 generates drive-control signals S _M , S _A , S _X , S _Y in accordance with an internal image signal from the image processor 201.

The address driver 203 processes the address signals S _A from the logic controller 202 to generate display data signals, and transmits the generated display data signals to the address electrode lines A ₁ , ... Am. Is authorized.

X driver 204, an X driver from the logic controller (202) to operate in accordance with control signals (S _X) and drives the X electrode lines _{(X 1, ..., X m} ). The Y driver 205 operates in accordance with the Y drive-control signal S _Y from the logic controller 202 to drive the Y electrode lines Y ₁ ,..., Y _n . The drive M 206 M driven from the logic controller (202) operates in accordance with a control signal (S _M) M electrode lines and drives the _{(M 1, ..., M n} ).

At this time, scanning pulses are sequentially applied to each of the M electrode lines M ₁ ,..., And M _n , and at the same time, a data pulse is applied to an address electrode line selected from among the address electrode lines A ₁ , ... Am. This is done.

Next, between all X electrode lines (X ₁ , ..., X _n ) and all Y electrode lines (Y ₁ , ..., Y _n ) such that the discharge cells selected by the addressing cause display-holding discharges. AC voltage is applied.

Accordingly, all X and Y electrode line pairs (X ₁ Y ₁ , X ₂ Y ₂ ,..., X _n Y _n ) and all Y and X electrode line pairs (Y ₁ X ₂ , Y ₂ X ₃ ,. ..., Y _n-1 X _n ), the discharge cells can be set.

Further, by the addressing, a wall charge state necessary for display-holding discharge is formed for both the X and Y electrodes of the selected discharge cell, and at least one of the X- and Y electrodes of the unselected discharge cell is required for display-holding discharge. No wall charge is formed.

For example, in four M electrode lines arranged in series, if there are two unselected discharge cells between two selected discharge cells, display-maintained discharge at either of the X and Y electrodes of each of the two unselected discharge cells. The wall charge state necessary for Therefore, while the discharge cells are set by all the X and Y electrode lines and all the Y and X electrode lines, a progressive driving method can be applied.

FIG. 3 illustrates a four-electrode surface discharge plasma display panel 300 of FIG. 2, and FIG. 4 illustrates a state in which the discharge electrodes of FIG. 3 are disposed.

3 and 4, the plasma display panel 300 includes a front panel 310 and a rear panel 360 coupled to the front panel 310. On the opposite inner edges of the front and rear panels 310 and 360, frit glass is applied to seal them to form a discharge space.                     

The front panel 310 is provided with a transparent substrate, such as a front substrate 311 such as soda lime glass. X and Y electrodes 312 and 313 are disposed on the inner surface of the front substrate 311.

The X and Y electrodes 312 and 313 are alternately arranged along the Y direction of the panel 300, and are disposed in pairs to face each other in the unit discharge cell. The X electrode 312 includes a first electrode line 312a and a first protrusion 312b protruding into a discharge cell from a sidewall of the first electrode line 312a, and the Y electrode 313 is formed of a first electrode line 312a. A second electrode line 313a and a second protrusion 313b protruding into the discharge cell from the sidewall of the second electrode line 312a. The first protrusion 312b and the second protrusion 313b are disposed to face each other in the discharge cell.

In addition, the X and Y electrodes 312 and 313 protrude from the sidewalls of the first and second electrode lines 312a and 313a so that the first and second protrusions 312b and 313b protrude from the panel 300. The structures are arranged in the discharge cells adjacent to each other in the Y direction, and the discharge voltage is commonly applied to the discharge cells adjacent to the Y direction.

Alternatively, the X and Y electrodes 312 and 313 may be simultaneously discharged only to discharge cells adjacent to the Y direction of the panel 300, and a separate discharge voltage is applied to discharge cells adjacent to the X direction. And the first and second protrusions 312b and 313b may extend integrally only from one side wall of the Y electrodes 312 and 313.

Between the pair of X and Y electrodes 312 and 313, another M electrode 314, which is another discharge electrode, is disposed to induce their long gap discharge. The M electrode 314 is disposed in parallel with the X and Y electrodes 312 and 313. In addition, the M electrode 314 is strip-shaped, and a different discharge voltage is applied to the X and Y electrodes 312 and 313.

The X and Y electrodes 312 and 313 and the M electrode 314 are limited to any one shape or structure as long as they are arranged in each unit discharge cell to start discharge from a gap between the electrodes. It is not.

The X and Y electrodes 312 and 313 and the M electrode 314 interposed therebetween are embedded by the front dielectric layer 315. The front dielectric layer 315 is printed on the entire surface inside S of the front substrate 311 using a transparent dielectric such as high dielectric material such as PbO-B ₂ O ₃ -SiO ₂ . Alternatively, the front dielectric layer 315 may be selectively formed only at the portions where the X and Y electrodes 312 and 313 and the M electrode 314 are formed.

A passivation layer 316 made of magnesium oxide (MgO) is formed on the surface of the front dielectric layer 315 to increase secondary electron emission. The passivation layer 316 is entirely deposited on the surface of the front dielectric layer 315.

The back panel 360 is provided with a back substrate 361 made of a transparent glass substrate, for example, soda lime glass. The rear substrate 361 is disposed to face the front substrate 311.

An address electrode 362 is formed on the inner surface of the back substrate 361. The address electrode 362 is disposed in a direction crossing the X and Y electrodes 312 and 313. The address electrode 362 extends across the discharge cells disposed adjacent to each other in the X direction of the panel 300. The address electrode 362 is made of a metal material having excellent conductivity, such as silver paste.

The address electrode 362 is embedded by the back dielectric layer 363. The back dielectric layer 363 is made of a highly dielectric material like the front dielectric layer 316.

A partition 364 is disposed between the front and rear panels 310 and 360. The partition 364 includes a first partition 364a disposed in a direction crossing the direction in which the address electrode 362 is disposed, and a second partition wall disposed in a direction parallel to the direction in which the address electrode 362 is disposed. 364b). The second partition 364b extends in a direction opposite from the inner side walls of the pair of adjacent first partitions 364a to define a delta type discharge cell.

The first and second barrier ribs 364a and 364b are integrally coupled to each other, and the limited discharge cells have a rectangular shape. Alternatively, the partition 364 may be manufactured in various shapes such as waffle type, meander type, matrix type, and the like, and the discharge space may also be circular, triangular, or hexagonal. It will be said that various embodiments exist.

On the other hand, red, green, and blue phosphor layers 365 are coated on the inner wall of the partition 364 and the upper surface of the back dielectric layer 363 for each discharge cell. In addition, a discharge gas of neon (Ne) -xenon (Xe) is injected into the discharge space defined by the front and rear panels 310 and 360 and the partition 364.

In this case, the address electrode 362 is limited to a distance between the electrodes disposed in the adjacent discharge cells and the width of each electrode to a specific value, thereby preventing mis-discharge.

In more detail, it is as following.

The partition 364 includes a first partition 364a disposed in the Y direction of the panel and a second partition 364b connected to the first partition 364a integrally and disposed in the X direction of the panel. The discharge cells defined by the barrier ribs 364 form a delta type.

In each of these discharge cells, the first protrusion 312b protrudes from the sidewall of the first electrode line 312a of the X electrode 312 and the side wall of the second electrode line 313a of the Y electrode 313. The second protrusion 313b is disposed to face each other, and the M electrode 314 is disposed in the discharge gap between the first protrusion 312b and the second protrusion 313b.

In this case, the address electrodes 362 are disposed in the direction crossing the X and Y electrodes 312 and 313, and are spaced apart by a predetermined interval in the direction parallel to the second partition 364b. The barrier rib 364 has a delta structure, that is, a structure in which discharge cells disposed adjacent to each other in the X direction of the panel and a discharge cell disposed adjacent to each other in the Y direction are alternately arranged, so that one address electrode 362 is provided. The silver extends across the discharge cell and the second partition 364b along the Y direction of the panel.

The address electrode 362 is formed integrally from the strip-shaped address electrode line 362a disposed at the position overlapping the second partition 364b and the address electrode line 362a, and is disposed in the X direction of the panel. And a discharge expanding portion 362b disposed in the cell. At this time, the discharge expanding unit 362b has a rectangular shape, and the discharge cells in which the discharge expanding unit 362b is disposed are also lattice-shaped.

Accordingly, the address electrode line 362a is disposed so that one address electrode 362 overlaps the second partition 364b, and the area enlarged portion 362b is disposed in the discharge cell along the X direction of the panel. Then, the address electrode line 362a is disposed to be integral with the second partition 364b, and the structure is repeated in the area enlarged portion 362b in the discharge cell along the X direction of the panel. .

At this time, the distance a between the area enlarged portions 362b of the address electrodes 362 disposed in the adjacent discharge cells along the Y-direction of the panel, and the width of the area enlarged portions 362b of the one address electrode 362 ( b) satisfies the following equation.

Equation

0.4 ≤ a / b ≤ 2.5

Here, a is an interval between adjacent address electrodes 362 and b is a width of one address electrode 362.

The width of the address electrode 362 or the spacing between adjacent address electrodes 362 should be designed so as to have a specific range as described in the above equation so that there is no effect of address between adjacent cells during addressing discharge.

Hereinafter, the misdischarge state according to the change in the distance and the width of the address electrode according to the experiment of the applicant is as shown in Table 1.                     

TABLE 1

a (μm) b (μm) a / b Discharge Discharge Cell Comparative Example 1 60 510 0.12 9 Comparative Example 2 120 480 0.25 3 Example 1 180 450 0.4 0 Example 2 240 420 0.57 0 Example 3 300 390 0.77 0 Example 4 360 360 One 0 Example 5 420 330 1.27 0 Example 6 480 300 1.6 0 Example 7 540 270 2 0 Example 8 600 240 2.5 0 Comparative Example 3 660 210 3.14 3

Here, the spacing of the address electrodes arranged in the adjacent discharge cells was increased in the order of 60 micrometers, and the width of the addresses was decreased in the order of 30 micrometers, so that the misdischarge cells were irradiated at the addressing discharge.

Referring to Table 1, as in Comparative Examples 1 and 2, the distance a between the address electrodes disposed in adjacent discharge cells is 60 and 120 micrometers, respectively, and the width b of the address electrodes is 501 and 480, respectively. When / b was 0.12 and 0.25, respectively, the misdischarge discharge cells were 9 and 3, respectively. In addition, as in Comparative Example 3, when the distance a between the address electrodes was 660, the width b of the address was 210, and a / b was 3.14, the erroneous discharge discharge cell was 3.

On the other hand, as in Embodiments 1 to 8, the spacing a between address electrodes disposed in adjacent discharge cells is 180, 240, 300, 360, 420, 480, 540, 600 micrometers, respectively, and the width b of the address electrode. ) Are 450, 420, 390, 360, 330, 300, 270, and 240 micrometers, respectively, and a / b is 0.4, 0.57, 0.77, 1, 1.27, 1.6, 2, and 2.5, respectively. 0.

As can be seen from these results, the spacing a between the address electrodes disposed in adjacent discharge cells and the ratio a / b to the width b of the address electrodes are greater than or equal to 0.4 and less than 2.5 In the same case, it can be seen that address mis-discharge does not occur because the adjacent discharge cells are not affected during addressing discharge.

On the other hand, when the width b of the address electrode is too large (comparative example 1 and comparative example 2) compared with the spacing a between the address electrodes, or on the contrary, the spacing between the address electrodes compared to the width b of the address electrode. If (a) is too large (Comparative Example 3), it can be seen that the address discharge is not properly performed.

Hereinafter, the operation of the multi-electrode plasma display panel according to an embodiment of the present invention will be described.

5 illustrates a signal applied to the discharge electrode of the plasma display panel 300 of FIG. 3.

Referring to the drawings, the final display to the immediately preceding unit in the last point in time (t ₁₂₎ of the sub-field sustain pulse is the so applied to all the X electrode lines, any one unit in the last point in time (t ₁₂₎ of the sub-field that is, units of the sub-fields At the first time point t ₁ of the subsequent unit subfield, negative (−) wall charges are formed around the X electrode of the discharge cells selected in the previous subfield, and the positive electrode is around the Y electrode of the discharge cells selected in the previous subfield. (+) Wall charges are formed.

Subsequently, in the wall charge erase time t ₁ to t ₂ of the reset time R of the unit subfield, the voltages applied to all the M electrode lines while the pulses of the second voltage Vs are applied to all the Y electrode lines. The voltage is continuously lowered from the second voltage Vs to the ground voltage V _G as the third voltage. At this time t ₁ to t ₂ , the ground voltage V _G is applied to the X electrode line and the address electrode line. Accordingly, wall discharges of all the discharge cells are erased while weak discharges occur between the electrodes of all the discharge cells.

Next, at the wall charge accumulation time t ₂ to t ₃ , the voltages applied to all the M electrode lines while the ground voltage V _G is applied to the X electrode line, the Y electrode line, and the address electrode line are the second voltage. The voltage is continuously raised to the first voltage V _SET + Vs which is higher by the fourth voltage V _SET than Vs. Here, it may be raised nonlinearly as shown by the solid line, or it may be raised linearly as shown by the dotted line. Accordingly, while a weak discharge occurs between the electrodes of all the discharge cells, a large number of negative (−) wall charges are formed around the M electrode, and positive (+) wall charges are formed around the remaining electrodes.

Subsequently, at the wall charge distribution time t ₃ to t ₄ , the voltages applied to all the X electrode lines and the Y electrode lines are maintained at the second voltage V _S , and the ground voltage V _G is applied to the address electrode line. In the applied state, the voltage applied to all M electrode lines is continuously lowered from the second voltage V _S to the ground voltage V _G as the third voltage. Here, it may be nonlinearly lowered as shown by the solid line or linearly lowered as shown by the dotted line. As a result, a weak discharge occurs between the electrodes of all the discharge cells, and a part of the negative (−) wall charges around the M electrode moves around the X and Y electrodes. In addition, more positive wall charges around the address electrodes.

Accordingly, the wall potentials of the X electrode line and the Y electrode line are lower than the wall potential of the address electrode line and higher than the wall potential of the M electrode line. Accordingly, the addressing voltages V _A -V _G required for the counter discharge between the selected address electrode line and the Y electrode line may be lowered at the subsequent addressing time A. FIG.

Next, at a subsequent addressing time A, the display data signal is applied to the address electrode line, and the ground voltage V is applied to the M electrode line biased with the fifth voltage V _SCAN lower than the second voltage V _{S. G} ) scan pulses are sequentially applied. The display data signal applied to each address electrode line has a positive addressing voltage when a discharge cell is selected and a ground voltage when it is not. Here, the ground voltage is applied to all the X electrode lines, and the second voltage V _S is applied to all the Y electrode lines. Accordingly, in the selected discharge cell, when the display data signal of the positive polarity addressing voltage V _A is applied while the scan pulse of the ground voltage V _G is applied, addressing discharge occurs. Due to this addressing discharge, positive wall charges are formed around the X and M electrodes of the selected discharge cells, and negative wall charges are formed around the Y and address electrodes of the selected discharge cells.

In the subsequent display-hold time S, with all the M electrode lines applied with the second voltage V _S and the ground voltage V _G applied with all the address electrode lines, all X electrode lines and all Y display of the second voltage (V _S) to the electrode line is applied to the sustain pulse is alternately. This causes a discharge for display-holding in the discharge cell in which the wall charge was formed in this state at the addressing time A. FIG. As such, long-gap discharge occurs in the X and Y electrode lines after the trigger discharge between the X electrode line and the M electrode in the discharge cell selected by the address discharge.

As described above, in the plasma display panel according to the present invention, the distance between the address electrodes disposed in the adjacent discharge cells and the width of the address electrode are limited to a specific value in the panel employing the multi-electrode, thereby preventing erroneous discharge during addressing discharge. can do. As a result, the discharge can be stabilized.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (8)

A first panel on which a plurality of first discharge electrodes are disposed; A second panel on which a second discharge electrode is disposed, the second discharge electrode being addressed; A partition wall disposed between the first and second panels to define a discharge cell; And a red, green, and blue phosphor layer coated in the discharge cell. A plasma display panel, wherein a distance a of the second discharge electrodes disposed in the adjacent discharge cells and a width b of the second discharge electrodes satisfy the following equation. Equation 0.4 ≤ a / b ≤ 2.5 Where a is the interval between adjacent second discharge electrodes and b is the width of each second discharge electrode. The method of claim 1, And the second discharge electrode includes a strip-shaped discharge electrode line arranged in one direction of the second panel, and a discharge enlargement unit integrally extending from the discharge electrode line into each discharge cell. The method of claim 2, And the discharge expanding portion has a rectangular shape. The method of claim 2, The first discharge electrode may include X and Y electrodes alternately arranged in a direction crossing the first discharge electrode, and an M electrode disposed in a discharge gap between the X and Y electrodes. . The method of claim 4, wherein A trigger discharge voltage is applied between the X and M electrodes, and a sustain discharge voltage is applied between the X and Y electrodes. The method of claim 1, The partition wall includes a first partition wall disposed in one direction of the panel and a second partition wall disposed in the other direction of the panel, wherein the first partition wall extends in a direction opposite from an inner wall of the pair of adjacent second partition walls. And arranged to form a delta type discharge cell. The method of claim 6, The second discharge electrodes are disposed to be spaced apart by a predetermined interval in a direction parallel to the second partition walls, and each discharge electrode is integrally formed from each of the discharge electrode lines having a strip shape extending to overlap with the second partition walls. And a discharge magnification portion disposed in each discharge cell. The method of claim 7, wherein And a discharge magnification disposed in each of the discharge cells is rectangular.

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