KR100581861B1 - Display panel improved on electrode structure - Google Patents

Abstract

A display panel having an improved electrode structure according to the present invention includes a display panel having an electrode structure in which a plurality of first electrodes and a plurality of second electrodes are arranged to cross each other, and one display cell is formed at each intersection. Each intersection has a protrusion formed in the direction of the second electrode, and one or more reinforcement portions are formed at the corners formed by the protrusion and the first electrode. Therefore, from the viewpoint of structural stability in projecting electrode processing, by forming the reinforcing portion in the projecting electrode, it is possible to prevent the occurrence of cracks in the projecting electrode at the time of firing after forming the electrode pattern. In addition, in terms of discharge performance, since the area added as the reinforcing portion contributes to the discharge, the discharge margin is increased, and the discharge stabilization effect of the display panel can be obtained.

Description

Display panel improved on electrode structure}

1 is a view showing the structure of a conventional three-electrode surface discharge plasma display panel.

FIG. 2 is a diagram for describing an operation of one cell of the panel illustrated in FIG. 1.

FIG. 3 shows a typical driving apparatus of the plasma display panel shown in FIG. 1.

4 is a schematic plan view illustrating an example of the panel illustrated in FIG. 1.

5A is a diagram for explaining the structure of a stripe address electrode.

5B is a view for explaining the structure of a protruding address electrode.

FIG. 6A illustrates an electrode shape after pattern formation of the protruding electrode, and FIG. 6B illustrates an electrode shape in which a pattern is contracted after firing.

7 is a cross-sectional view of the plasma display panel.

8A is a schematic plan view illustrating an electrode structure of a display panel according to an exemplary embodiment of the present invention.

FIG. 8B is a schematic plan view of a modified embodiment of the electrode structure of the display panel shown in FIG. 8A.

FIG. 8C is a schematic plan view of another modified embodiment of the electrode structure of the display panel illustrated in FIG. 8A.

FIG. 8D is a schematic plan view of another modified embodiment of the electrode structure of the display panel illustrated in FIG. 8A.

9A is a schematic plan view illustrating an electrode structure of a display panel according to another exemplary embodiment of the present invention.

FIG. 9B is a schematic plan view of a modified embodiment of the electrode structure of the display panel shown in FIG. 9A.

10 is a view schematically showing the electrode structure of the PDP of the top drive method to which the present invention can be applied.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display panel, and more particularly, to a display panel having a terminal portion structure for connecting a plurality of electrodes and a driving circuit portion.

A typical display panel has a panel portion and a driving circuit portion.

1 is a view showing the structure of a conventional three-electrode surface discharge plasma display panel. FIG. 2 is a diagram for describing an operation of one cell of the panel illustrated in FIG. 1.

1 and 2, between the upper and lower glass substrates 100 and 106 of the conventional surface discharge plasma display panel 1, the address electrode lines A ₁ , A ₂ ,. _m ), dielectric layers 102 and 110, Y electrode lines Y ₁ , ..., Y _n , X electrode lines X ₁ , ..., X _n , fluorescent layer 112, barrier ribs ( 114) and, for example, a magnesium oxide (MgO) layer 104 is provided.

The address electrode lines A ₁ , A ₂ ,..., A _m are formed in a predetermined pattern on the lower glass substrate 106. The lower dielectric layer 110 is applied over the address electrode lines A ₁ , A ₂ ,..., A _m . The partition walls 114 are formed on the lower dielectric layer 110 in a direction parallel to the address electrode lines A ₁ , A ₂ ,..., A _m . The partition walls 114 function to partition the discharge area of each display cell and to prevent optical interference between the display cells. The fluorescent layer 112 is formed between the partition walls 114.

The X electrode lines X ₁ , ..., X _n and the Y electrode lines Y ₁ , ..., Y _n are address electrode lines A ₁ , A ₂ , ..., A _m . It is formed in a predetermined pattern under the upper glass substrate 100 to be perpendicular to the. Each intersection sets a corresponding display cell. Each X electrode line (X ₁ , ..., X _n ) and each Y electrode line (Y ₁ , ..., Y _n ) are transparent electrode lines (X _na ) made of a transparent conductive material such as indium tin oxide (ITO). , Y _na ) and metal electrode lines X _nb and Y _nb for increasing conductivity may be formed. The upper dielectric layer 102 is formed by coating the entire surface below the X electrode lines X ₁ , ..., X _n and the Y electrode lines Y ₁ , ..., Y _n . A protective layer 104 for protecting the panel 1 from strong electric fields, for example, a magnesium oxide (MgO) layer, is formed by full deposition underneath the upper dielectric layer 102. The plasma forming gas is sealed in the discharge space 108.

A driving scheme generally applied to such a plasma display panel is a method in which initialization, address, and display holding steps are sequentially performed in a unit sub-field. In the initialization step, the charge states of the display cells to be driven are made uniform. In the address step, the charge state of display cells to be selected and the charge state of display cells not to be selected are set. In the display holding step, display discharge is performed in the display cells to be selected. At this time, a plasma is formed from the plasma forming gas of the display cells performing display discharge, and the fluorescent layer 112 of the display cells is excited by ultraviolet radiation from the plasma to generate light.

Here, since the unit sub-fields are included in the unit frame, the desired gray level can be displayed by the display holding times of each sub-field.

FIG. 3 shows a typical driving device of the plasma display panel 1 shown in FIG. 1.

Referring to FIG. 3, a typical driving apparatus of the plasma display panel 1 includes an image processor 300, a controller 302, an address driver 306, an X driver 308, and a Y driver 304. . The image processing unit 300 converts an external analog image signal into a digital signal, and internal image signals, for example, 8-bit red (R), green (G), and blue (B) image data, clock signals, vertical and horizontal, respectively. Generate sync signals. The controller 302 generates driving control signals S _A , S _Y , and S _X according to an internal image signal from the image processor 300. The address driver 306 generates the display data signal by processing the address signal S _A among the driving control signals S _A , S _Y , and S _X from the controller 302, and generates the display data signal. It is applied to the address electrode lines A ₁ , A ₂ ,..., A _m . The X driver 308 processes the X driving control signal S _X among the driving control signals S _A , S _Y , and S _X from the controller 302, and applies the X driving control signal S _X to the X electrode lines. The Y driver 304 processes the Y driving control signal S _Y among the driving control signals S _A , S _Y , and S _X from the controller 302, and applies the Y driving control signal S _Y to the Y electrode lines.

4 is a schematic plan view illustrating an example of the panel illustrated in FIG. 1, in which a black stripe 416 is formed, and transparent electrode lines Xna and Yna are separated from each cell with a partition 414 therebetween. The structure extends from the metal electrode lines Xnb and Ynb. The electrode structure shown in FIG. 4 is an example of a structure for obtaining a high efficiency discharge by removing portions unnecessary for discharge located on the partition wall 414 among the portions of the transparent electrode lines Xna and Yna. In addition, the black stripe 416 may be provided in the interval between the unit cell and the unit cell in order to improve the contrast of the display panel.

In the stripe-shaped address electrode A structure shown in Fig. 5A, to widen the discharge area C where the address electrode A and the scan Y electrode cross, the width of the address electrode A is increased. It is required to widen that much. However, when the width of the address electrode A becomes wider, power consumption for addressing the display panel increases. In particular, it is a cause of high power consumption in low gradation expression or actual video implementation.

In order to solve this problem, the projecting address electrode structure shown in FIG. 5B is provided. The protrusion 504 is provided in the discharge area where the address electrode A and the scan (Y) electrode intersect, which function at the time of address discharge. The portions other than the protrusion 504 of the address electrode A are formed of relatively thin conductors. Therefore, while ensuring a stable address discharge area, the overall power consumption is maintained. However, in the structure of the address electrode A shown in Fig. 5B, protrusions 504 having the same shape are formed side by side along the scan electrode Y, so that they are electrically connected to each other in an area indicated by reference numeral 506 between neighboring address electrodes. Will cause interference.

An object of the present invention is to provide a display panel with a structurally stable projecting electrode.

The display panel according to an aspect of the present invention for achieving the above technical problem, forms a cross-section of a plurality of first electrodes and a plurality of second electrodes are arranged cross-sectional, one display cell is formed in each of the intersections A display panel having an electrode structure, wherein each of the intersections has a protrusion formed in the direction of the second electrode, and one or more reinforcement portions are formed at corners formed by the protrusion and the first electrode. . The reinforcement part may be formed in an obtuse straight line at an edge of the protrusion part and the first electrode. In addition, the reinforcing portion may be formed in an arc-shaped gentle curve on the corner of the protrusion and the first electrode.

According to another aspect of the present invention, there is provided a display panel including an intersection where a plurality of first electrodes and a plurality of second electrodes are alternately arranged, and one display cell is formed at each intersection. A display panel having an electrode structure, wherein each of the first electrodes is formed in parallel with two thin electrode lines spaced at predetermined intervals, and forms a discharge area at an intersection with the second electrode, and has a ladder shape connected thereto. It is formed in a structure, characterized in that one or more reinforcement is formed in the corner formed by the two electrode lines and the intersection of the first electrode. The reinforcement part may be formed in an obtuse straight line at an edge of the protrusion part and the first electrode. In addition, the reinforcing portion may be formed in an arc-shaped gentle curve on the corner of the protrusion and the first electrode.

According to the above display panel, in view of structural stability in projecting electrode processing, by forming a reinforcing portion on the projecting electrode, it is possible to prevent the occurrence of cracks in the projecting electrode during firing after forming the electrode pattern.

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

Hereinafter, for convenience of description, the three-electrode surface discharge type AC PDP will be described as an example. In addition, the present invention will be described based on the embodiments in which the protrusions characteristic of the present invention are formed in the address electrode of the AC PDP.

FIG. 6A illustrates an electrode shape after pattern formation of the protruding electrode, and FIG. 6B illustrates an electrode shape in which a pattern is contracted after firing. Since the stripe electrode of FIG. 5A contracts under uniform contracting force, problems such as edge cracking do not occur. However, in the case of the protruding electrode, as indicated by the arrow in FIG. 6B, a crack occurs at the intersection 604 of the address electrode line 600b and the protrusion 602b. Since the contraction force 606 of the protrusion 602b and the contraction force 608 of the address electrode line 600b act in the direction of tearing the intersecting portion 604 during firing after forming the electrode pattern by an etching process method or the like, The portion 604 will be cracked.

8A is a schematic plan view illustrating an electrode structure of a display panel according to an exemplary embodiment of the present invention. The address electrode 800 is formed in parallel with the partition wall 806. The scan (Y) electrode and the common (X) electrode are formed orthogonal to the partition wall 806 and the address electrode 806. At the position where the address electrode 800 and the scan (Y) electrode are perpendicular to each other, the protrusion 802a is formed in a direction parallel to the scan (Y) electrode. The protrusion 802a increases the discharge area between the address electrode and the scan (Y) electrode. A reinforcement part 804a is formed at an edge at which the protrusion 802a and the address electrode 800 cross at right angles. As shown in and described with reference to FIG. 6, the reinforcement part 804a prevents the edges from cracking due to the contracting force of the protrusion 802a and the contracting force of the address electrode 800 during firing after the electrode pattern is formed.

7 is a cross-sectional view of the plasma display panel. An address electrode 706 is provided on the substrate 708, a dielectric layer 704 covering the address electrode 706 is provided on the substrate 708, and the partition walls 700 are formed on the dielectric layer 704. ) Is provided in a direction parallel to. A fluorescent layer 702 is applied to the spaces between the partition walls 700 on the dielectric layer 704. The partition walls 700 function to partition and seal the discharge area of each display cell and to prevent optical interference between each display cell. Although not shown in the drawing, the scan (Y) electrode and the common (X) electrode are arranged at right angles to the address electrode 706 and the partition 700. Here, when paying attention to the interval 708 between the address electrode 706, the address electrode 706 should be provided to be spaced apart from the partition wall 700 by a predetermined interval (Δ) or more. If the distance between the address electrode 706 and the partition wall 700 is smaller than the predetermined value Δ, the wall charges of the adjacent cells are affected and an error occurs in the address operation. Considering the intensity of the address discharge, considering that the discharge area between the address electrode 706 and the scan (Y) electrode must be large in one cell, the address electrode 800 and the protrusion 802a shown in FIG. The reinforcement portion 804a formed at the intersection of the two also provides the effect of increasing the discharge area. In other words, by providing the reinforcing portion 804a, not only an effect of structurally reinforcing the protrusion 802a but also a discharge stabilizing effect in terms of discharge function are obtained.

FIG. 8B is a schematic plan view of a modified embodiment of the electrode structure of the display panel shown in FIG. 8A. In this case, the reinforcing portion 804b is formed only at two corner portions among the four corners formed at the intersection of the protrusion 802a and the address electrode 800.

FIG. 8C is a schematic plan view of another modified embodiment of the electrode structure of the display panel illustrated in FIG. 8A. Here, the reinforcement part 804c is formed in circular arc shape, and prevents the edge crack of the protrusion part 802a.

FIG. 8D is a schematic plan view of another modified embodiment of the electrode structure of the display panel illustrated in FIG. 8A. Here, the protrusion 802b is formed in a tapered shape while being perpendicular to the address electrode 800. And the reinforcement part 804d is formed so that the edge crack of the protrusion 802b may be prevented.

9A is a schematic plan view illustrating an electrode structure of a display panel according to another exemplary embodiment of the present invention. Referring to FIG. 9A, an address electrode 900 is formed between the partitions 906 in parallel with the partition 906. Unlike the protruding electrode structure shown in FIGS. 8A to 8D, the address electrode 900 of FIG. 9A has two narrow address electrode lines 901 formed therein, and the intersection with the scan (Y) electrode ( 902 has a ladder-shaped structure connected. The intersection 902 forms the discharge area of the scan (Y) electrode and the address electrode 900. Also at this time, the edges are cracked due to the contracting force of the crossing portion 902 and the contracting force of the address electrode line 901 during firing after the formation of the electrode pattern. The reinforcement part 904a is formed in this corner part, and this edge crack is prevented.

FIG. 9B is a schematic plan view of a modified embodiment of the electrode structure of the display panel shown in FIG. 9A. Here, the reinforcement part 904b is formed in circular arc shape, and the edge part of the intersection part 902 is prevented from cracking.

As described above, the present invention has been described by exemplifying a surface discharge type AC PDP panel, but is not limited thereto. The present invention is applicable to all display devices having an electrode structure in which driving electrodes are provided on substrates facing each other and a panel is displayed by mutual driving of the electrodes. It will be apparent to those skilled in the art that not only an AC PDP but also the technical idea of the present invention can be applied to, for example, a DC PDP, an electroluminescence display (ELD), a liquid crystal display (LCD), a field emission display (FED), and the like.

In addition, the above-described embodiment has been described based on the front-drive type surface discharge type AC PDP as shown in Figs. 1 and 2, wherein the address electrode is disposed on the upper substrate and the scan electrode is disposed on the lower address substrate. However, in the electrode structure of the present invention, as shown in Fig. 10, no electrode is disposed on the substrate 100a, and the address electrode A and the scan electrode Y are sandwiched between the dielectric layers 110a and 102a. It will be appreciated that the same can be applied to the top-drive type surface discharge AC PDP disposed on the same substrate 106a.

In addition, the above-described embodiment has been described based on the three-electrode surface discharge type AC PDP in which the scan (Y) electrode and the common (X) electrode have a stripe shape, but this is in various forms such as the electrode structure shown in FIG. It will be appreciated that the present invention can be applied to a display panel having a scan (Y) electrode and a common (X) electrode structure.

In the above drawings and the specification preferred embodiments of the present invention have been disclosed. However, this is merely used for the purpose of illustrating the present invention and does not limit the scope of the invention described in the claims. Therefore, 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.

As described above, according to the display panel of the present invention, the following effects can be obtained.

First, in terms of structural stability in projecting electrode processing, by forming a reinforcing portion in the projecting electrode, it is possible to prevent the occurrence of cracks in the projecting electrode during firing after forming the electrode pattern. Therefore, the electrode yield is improved to reduce the manufacturing cost.

Second, in terms of discharge performance, since the area added as the reinforcing portion contributes to the discharge, the discharge margin is increased, and thus the discharge stabilization effect of the display panel can be obtained.

The invention is not limited to the examples described above and represented in the drawings. Those skilled in the art taught by the above-described embodiments will make many modifications to the above-described embodiments within the scope and object of the invention as set forth in the following claims.

Claims (6)

A display panel having an electrode structure in which a plurality of first electrodes and a plurality of second electrodes are formed to cross each other, and an electrode structure in which one display cell is formed at each of the intersections is provided. Protruding portions are formed at the respective crossing portions in the direction of the second electrodes, Display panel, characterized in that one or more reinforcement is formed in the corner formed by the protrusion and the first electrode. The method of claim 1, wherein the reinforcement portion, Display panel, characterized in that formed in an obtuse straight line on the corner of the protrusion and the first electrode. The method of claim 1, wherein the reinforcement portion, Display panel, characterized in that formed in an arc-shaped gentle curve on the corner of the protrusion and the first electrode. A display panel having an electrode structure in which a plurality of first electrodes and a plurality of second electrodes are formed to cross each other, and an electrode structure in which one display cell is formed at each of the intersections is provided. Each of the first electrodes may be formed in parallel with two thin electrode lines spaced at predetermined intervals and form a discharge area at an intersection with the second electrode, and have a ladder-like structure. And at least one reinforcing part is formed at an edge formed by the two electrode lines and the intersection part of the first electrode. The method of claim 4, wherein the reinforcement, Display panel, characterized in that formed in an obtuse straight line on the corner of the protrusion and the first electrode. The method of claim 4, wherein the reinforcement, Display panel, characterized in that formed in an arc-shaped gentle curve on the corner of the protrusion and the first electrode.

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