KR20010078598A - Plasma display panel - Google Patents

Abstract

PURPOSE: A plasma display panel is provided to reduce the output amount of electromagnetic interference waves because current directions flowing in X-Y electrode lines and black lines are opposite to each other. CONSTITUTION: Conductive first and second black lines for enhancing contrast are formed to be parallel to electrode lines and are positioned between respective X and Y electrode line pairs(X1,...,Xn;Y1,...,Yn). The first black lines(...,Bxn-1,BXn) are positioned beside the X electrode lines and the second black lines(By1,...Byn) are positioned beside the Y electrode lines. Further, the X electrode lines and the first black lines are connected to each other on the opposite side to the drive signal input positions of the X electrode lines, and Y electrode lines and the second black lines are connected to each other on the opposite side to the drive signal input positions of the Y electrode lines.

Description

Plasma display panel {Plasma display panel}

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel of a three-electrode surface discharge method.

1 shows a structure of a conventional three-electrode surface discharge plasma display panel.

Referring to FIG. 1, between the front and rear glass substrates 10 and 13 of a general surface discharge plasma display panel 1, address electrode lines A _R1 , A _G1 ,..., A _Gm , A _Bm ), Dielectric layers 11 and 15, Y electrode lines (Y ₁ , ..., Y _n ), X electrode lines (X ₁ , ..., X _n ), black lines (...., B _n-1 ), the fluorescent layer 16, the partition 17, and the magnesium monoxide (MgO) layer 12 as a protective layer are provided.

The address electrode lines A _R1 , A _G1 ,..., A _Gm , A _Bm are formed in a predetermined pattern on the front surface of the rear glass substrate 13. The back dielectric layer 15 is formed in front of the address electrode lines A _R1 , A _G1 ,..., A _Gm , A _Bm . On the front surface of the rear dielectric layer 15, barrier ribs 17 are formed in parallel with the address electrode lines A _R1 , A _G1 ,..., A _Gm , A _Bm . These partitions 17 function to partition the discharge area of each discharge-cell and to prevent optical cross talk between each discharge-cell. The fluorescent layer 16 is formed between the partition walls 17.

The X electrode lines (X ₁ , ..., X _n ) and the Y electrode lines (Y ₁ , ..., Y _n ) are the address electrode lines (A _R1 , A _G1 , ..., A _Gm , A _Bm ) is formed in a predetermined pattern on the rear surface of the front glass substrate 10 to be orthogonal to each other. Each intersection defines a corresponding discharge-cell. Black lines (..., B _n-1 ) are formed to improve contrast. The front dielectric layer 11 is formed after the X electrode lines X ₁ ,..., X _n and the Y electrode lines Y ₁ ,..., Y _n . A magnesium monoxide (MgO) layer 12 for protecting the panel 1 from a strong electric field is formed on the back side of the front dielectric layer 11. The plasma forming gas is sealed in the discharge space 14.

The driving method basically applied to the plasma display panel is a method in which the reset, address, and sustain discharge steps are sequentially performed in the unit subfield. In the reset step, the remaining wall charges in the previous subfield are erased and driven so that the space charges are generated evenly. In the addressing step, wall charges are driven to form in the selected discharge-cells. In the sustain discharge step, light is driven in discharge-cells in which wall charges are formed in the addressing discharge step. That is, when a relatively high alternating pulse voltage is applied between the X electrode lines X ₁ , ..., X _n and the Y electrode lines Y ₁ , ..., Y _n , a discharge in which wall charges are formed is formed. -Causes surface discharge in the cells. At this time, a plasma is formed in the gas layer, and the fluorescent layer 16 is excited by the ultraviolet radiation to generate light.

FIG. 2 illustrates a current direction in a state where a pulse voltage is applied to all of the Y electrode lines Y ₁ ,..., Y _n in the sustain discharge cycle of the plasma display panel of FIG. 1. In FIG. 2, the same reference numerals as used in FIG. 1 indicate the same members. 2, the drive current, Y electrode lines (Y _1, ..., Y _n) is a drive voltage applied to the Y drive position (D _Y) Y electrode lines (Y _1, ... from which a , Y _n ), the discharge space 14 of the discharge-cells in which the wall charges are formed, and the X drive to which the driving voltage (mostly the ground voltage) is applied through the X electrode lines X ₁ ,..., X _n . Flow to position D _X. In summary, the currents of all the sustain electrode lines flow from the Y drive position D _Y to the X drive position D _X.

3 illustrates a current direction in a state where a pulse voltage is applied to all X electrode lines X ₁ ,..., X _n in the sustain discharge period of the plasma display panel of FIG. 1. In FIG. 3, the same reference numerals as used in FIG. 1 indicate the same members. 3, the drive current is, the X-electrode lines (X _1, ..., X _n) where the X driving applied with a driving voltage to the X electrodes from the line _{(D X) (X 1,} ... , X _n ), Y drive through which the driving voltage (mostly the ground voltage) is applied through the discharge space 14 of the discharge-cells in which the wall charges are formed, and the Y electrode lines Y ₁ ,..., Y _n . Flow to position D _Y. In summary, the currents of all the sustain electrode lines flow from the X driving position D _X to the Y driving position D _Y.

As described above, according to the plasma display panel of FIG. 1, the directions of driving currents flowing at each time point of the sustain discharge cycle are all constant. As a result, the amount of emission of electro-magnetic interference waves increases.

An object of the present invention is to provide a plasma display panel that can reduce the amount of electromagnetic interference waves emitted.

1 is a perspective view showing an interior of a conventional three-electrode surface discharge plasma display panel.

2 and 3 are schematic plan views of the front assembly for showing the current direction in the sustain discharge cycle of the plasma display panel of FIG.

4 is an internal perspective view showing a three-electrode surface discharge plasma display panel according to the present invention.

FIG. 5 is an enlarged view of a region C _X of FIG. 4.

FIG. 6 is an enlarged view of the region C _Y of FIG. 4.

7 and 8 are schematic plan views of the front assembly for showing the current direction in the sustain discharge cycle of the plasma display panel of FIG.

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

1, 2 ... plasma display panel, 10, 20 ... front glass substrate,

11, 15, 21, 25 ... dielectric layer, 12, 22 ... magnesium monoxide layer,

13, 23 ... rear glass substrate, 14, 24 ... discharge space,

16, 26 ... fluorescent layer, 17, 27 ... bulkhead,

X ₁ , ..., X _n ... X electrode line, Y ₁ , ..., Y _n ... Y electrode line,

A _R1 , A _G1 , ..., A _Gm , A _Bm ... address electrode line,

B _n-1 , B _Y1 , ..., B _Xn ... black line, D _X ... X driving position,

D _Y ... Y drive position.

In the plasma display panel of the present invention for achieving the above object, a pair of X electrode lines and Y electrode lines are formed parallel to each other on the rear surface of the front substrate, the X electrode line on the front surface of the rear substrate spaced apart from the front substrate Address electrode lines are formed so as to be orthogonal to the Y and Y electrode lines, so that a discharge-cell corresponding to each intersection point is defined. Here, the first and second black lines, which are formed in parallel with the pairs of the electrode lines between the pairs of the electrode lines, are provided to improve contrast. The first black line is located next to the X electrode line, and the second black line is located next to the Y electrode line. The X electrode line is connected to the first black line at a position opposite to the driving signal input position of the X electrode line. The Y electrode line is connected to the second black line at a position opposite to the driving signal input position of the Y electrode line.

According to the plasma display panel of the present invention, at each time point of the sustain discharge period in which an alternating pulse voltage is applied between the X electrode lines and the Y electrode lines, the direction of the current flowing through the X and Y electrode lines and the The directions of the currents flowing in the black lines are opposite to each other. Accordingly, the emission amount can be reduced due to the cancellation of the electromagnetic interference wave.

Hereinafter, preferred embodiments according to the present invention will be described in detail.

4 shows a three-electrode surface discharge plasma display panel according to the present invention. 5 is a view of FIG. 4 Enlarge the area. 6 is a view of FIG. 4 Enlarge the area.

4, 5 and 6, between the front and rear glass substrates 20 and 23 of the surface discharge plasma display panel 2 according to the present invention, the address electrode lines A _R1 , A _G1 ,. , A _Gm , A _Bm ), dielectric layers 21, 25, Y electrode lines (Y ₁ , ..., Y _n ), X electrode lines (X ₁ , ..., X _n ), black line (B _Y1 ,..., B _Xn ), the fluorescent layer 16, the partition 27, and the magnesium monoxide (MgO) layer 22 as a protective layer are provided.

The address electrode lines A _R1 , A _G1 ,..., A _Gm , A _Bm are formed in a predetermined pattern on the front surface of the rear glass substrate 23. The back dielectric layer 25 is formed in front of the address electrode lines A _R1 , A _G1 ,..., A _Gm , A _Bm . On the front surface of the rear dielectric layer 25, barrier ribs 27 are formed in parallel with the address electrode lines A _R1 , A _G1 ,..., A _Gm , A _Bm . These partitions 27 function to partition the discharge area of each discharge-cell and to prevent optical interference between each discharge-cell. The fluorescent layer 26 is formed between the partitions 27.

The X electrode lines (X ₁ , ..., X _n ) and the Y electrode lines (Y ₁ , ..., Y _n ) are the address electrode lines (A _R1 , A _G1 , ..., A _Gm , A _Bm ) is formed in a predetermined pattern on the rear surface of the front glass substrate 20 to be orthogonal to each other. Each intersection defines a corresponding discharge-cell. Black lines B _Y1 ,..., B _Xn are formed to improve contrast. The front dielectric layer 21 is formed after the X electrode lines X ₁ ,..., X _n and the Y electrode lines Y ₁ ,..., Y _n . A magnesium monoxide layer 22 for protecting the panel 2 from the strong electric field is formed on the back side of the front dielectric layer 21. The plasma forming gas is sealed in the discharge space 24.

Between the pairs X and Y of each of the sustain electrode lines, conductive first and second black lines formed in parallel with the pairs X and Y of each electrode line are provided. Each first black line (..., B _Xn-1 , B _Xn ) is located next to the corresponding X electrode line (X ₁ , ..., X _n ), and each second black line (B _Y1 , ..., B _Yn ) is located next to the corresponding Y electrode line (Y ₁ , ..., Y _n ). The first black line (..., B _Xn-1 , B _Xn ) corresponding to each X electrode line (X ₁ , ..., X _n ) is the X electrode lines (X ₁ , ..., X _n ) is connected to each other at the Y driving position (D _Y ), which is a position opposite to the driving signal input position (D _X ). In addition, the second black line B _Y1 ,..., B _Yn corresponding to each of the Y electrode lines Y ₁ ,..., Y _n may be Y electrode lines Y ₁ ,... Y _n ) are connected to each other at the X driving position D _X , which is the position opposite to the driving signal input position D _Y.

FIG. 7 shows a current direction in a state where a pulse voltage is applied to all the Y electrode lines Y ₁ ,..., Y _n in the sustain discharge cycle of the plasma display panel 2 of FIG. 4. In FIG. 7, the same reference numerals as used in FIG. 4 indicate the same members. Referring to Figure 7, drive current, Y electrode lines (Y _1, ..., Y _n) is a drive voltage applied to the Y drive position (D _Y) Y electrode lines (Y _1, ... from which a , Y _n ), second black lines B _Y1 ,..., B _Yn , discharge spaces of discharge-cells in which wall charges are formed (24 in FIG. 4), first black lines B _X1 , .. , B _Xn ), and X electrode lines (X ₁ ,..., X _n ) flow to the X driving position D _X to which the driving voltage (mostly the ground voltage) is applied. In summary, the direction of the current of all the sustain electrode lines _(Y D -> D _X) are all black line direction of the current of (B _Y1, ..., _Xn B) _(X D -> D _Y) and the opposite . Accordingly, the emission amount can be reduced due to the cancellation of the electromagnetic interference wave.

FIG. 8 illustrates a current direction in a state where a pulse voltage is applied to all X electrode lines X ₁ ,..., X _n in the sustain discharge period of the plasma display panel 2 of FIG. 4. In FIG. 8, the same reference numerals as used in FIG. 4 indicate the same members. 8, the drive current is, the X-electrode lines (X _1, ..., X _n) where the X driving applied with a driving voltage to the X electrodes from the line _{(D X) (X 1,} ... , X _n ), the first black lines B _X1 ,..., B _Xn , the discharge space of the discharge-cells in which the wall charges are formed (24 in FIG. 4), and the second black lines B _Y1 . , B _Yn ), and Y electrode lines (Y ₁ , ..., Y _n ) flow to the Y drive position D _{Y to} which its drive voltage (mostly ground voltage) is applied. In summary, the direction of the current of all the sustain electrode lines _(X D -> D _Y) is a direction of a current to all the black lines (B _Y1, ..., _Xn B) - the opposite _(Y D> D _X) . Accordingly, the emission amount can be reduced due to the cancellation of the electromagnetic interference wave.

As described above, according to the plasma display panel according to the present invention, the current flowing in the X and Y electrode lines at each time point of the sustain discharge period in which an alternating pulse voltage is applied between the X electrode lines and the Y electrode lines. The direction of and the direction of current flowing in the black lines are opposite to each other. Accordingly, the emission amount can be reduced due to the cancellation of the electromagnetic interference wave.

The present invention is not limited to the above embodiments, but may be modified and improved by those skilled in the art within the spirit and scope of the invention as defined in the claims.

Claims (1)

The pair of X electrode lines and Y electrode lines are formed parallel to each other on the rear surface of the front substrate, and the address electrode lines are orthogonal to the X electrode lines and the Y electrode lines on the front surface of the rear substrate facing away from the front substrate. In the plasma display panel in which discharge-cells corresponding to respective intersections are defined, Formed in parallel with the pair of electrode lines between the pair of electrode lines, the conductive first and second black lines are provided to improve contrast, The first black line is located next to the X electrode line, The second black line is located next to the Y electrode line, The X electrode line is connected to the first black line at a position opposite to the driving signal input position of the X electrode line, A plasma display panel connected to the Y electrode line and the second black line at a position opposite to a driving signal input position of the Y electrode line;