KR100747252B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel including a scan electrode and a sustain electrode.

The present invention relates to a plasma display panel for improving the structure of the scan electrode and the sustain electrode to improve the brightness and luminous efficiency. The present invention is formed in a direction parallel to the scan electrode and has a different area from the scan electrode in the discharge cell. It is characterized by including a sustain electrode.

Description

Plasma Display Panel

1 is a perspective view schematically showing the structure of a conventional plasma display panel.

2 is a view showing an electrode structure of a conventional plasma display panel.

3 is a view showing that the discharge intensity in the discharge space is different in the electrode structure of the conventional plasma display panel.

4 is a view showing an electrode structure of the plasma display panel of the present invention.

5 is a view showing that the discharge intensity in the discharge space is different in the electrode structure of the plasma display panel of the present invention.

Figure 6 is a view showing an embodiment of a transparent electrode of the scan electrode and the sustain electrode in the present invention.

7A to 7I illustrate an embodiment of an electrode structure located in a discharge space of a plasma display panel of the present invention.

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

402: scan electrode 403: sustain electrode

413: address electrode 416: discharge cell

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel including a scan electrode and a sustain electrode.

In general, a plasma display panel includes a partition wall formed between a front substrate and a rear substrate of soda-lime glass to form one discharge cell. Each cell is filled with a main discharge gas such as neon (Ne), helium (He) or a mixture of neon and helium (Ne + He) and an inert gas containing a small amount of xenon (Xe). When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image.

1 is a perspective view schematically showing the structure of a conventional plasma display panel.

As shown in FIG. 1, the plasma display panel is coupled in parallel with a front substrate 101, which is a display surface on which an image is displayed, and a rear substrate 110, which forms a rear surface, with a predetermined distance therebetween.

The front substrate 101 is made of a scan electrode 102 and a sustain electrode 103, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the bus electrode b are formed in pairs. The scan electrode 102 and the sustain electrode 103 are covered by one or more dielectric layers 104 which limit the discharge current and insulate the electrode pairs, and the magnesium oxide top surface of the dielectric layer 104 to facilitate the discharge conditions. A protective layer 105 on which (MgO) is deposited is formed.

The rear substrate 110 is arranged in such a manner that a plurality of discharge spaces, that is, barrier ribs 112 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 which perform address discharge to generate vacuum ultraviolet rays are arranged in parallel with the partition wall 112. On the upper side of the rear substrate 110, R, G, and B phosphors 114 which emit visible light for image display during address discharge are coated. Looking at the electrode structure of the electrode of the plasma display panel as shown in FIG.

2 is a diagram illustrating an electrode structure of a conventional plasma display panel.

As shown in FIG. 2, the electrode structure of the plasma display panel is formed by arranging a transparent electrode a and a bus electrode b in a stripe type on a front substrate (not shown). 113 is formed on the back substrate (not shown) in the direction crossing the transparent electrode (a) and the bus electrode (b). The discharge intensity discharged from the scan electrode 102 and the sustain electrode 103 of the plasma display panel having such an electrode structure is not evenly generated in the discharge cell 116. Details thereof will be described with reference to FIG. 3.

3 is a view showing that the discharge intensity in the discharge space is different in the electrode structure of the conventional plasma display panel.

In the electrode structure of FIG. 3, the scan electrode 102 and the sustain electrode 103 are formed on a front substrate (not shown), and the scan electrode 102 and the sustain electrode 103 are formed with a bus electrode b in a discharge cell. Located at both points to face each other with the center of the discharge cell 116 in between. In the plasma display panel having such an electrode structure, the discharge intensity generated during the discharge of the scan electrode 102 and the sustain electrode 103, that is, during the surface discharge, is strong in the scan electrode 102. At this time, since the discharge intensity appears strongly in one portion of the discharge cell 116, one side of the discharge cell 116 becomes dark and the other side becomes weak, resulting in a difference in luminance.

In order to solve the above problems, an object of the present invention is to provide a plasma display panel that improves the structure of the scan electrode and the sustain electrode to improve brightness and increase luminous efficiency.

In order to achieve the above object, the present invention is characterized in that it comprises a sustain electrode formed in a direction parallel to the scan electrode, the area different from the scan electrode in the discharge cell.

Further, the area of the scan electrode is smaller than that of the sustain electrode in the discharge cell.

In addition, the scan electrode and the sustain electrode are each composed of a transparent electrode and a bus electrode, the area of the transparent electrode of the scan electrode in the discharge cell is characterized in that smaller than the area of the transparent electrode of the sustain electrode.

Also, the scan electrode and the sustain electrode are asymmetrical.

In addition, the scan electrode protrudes toward the center of the discharge cell and is smaller than the area of the sustain electrode.

In addition, the sustain electrode protrudes toward the center of the discharge cell and is characterized in that it is wider than the area of the scan electrode.

In addition, the scan electrode includes a transparent electrode and a bus electrode, the transparent electrode of the scan electrode includes a body portion extending in a direction parallel to the bus electrode of the scan electrode and a protrusion protruding toward the discharge cell center from the body portion, the protrusion portion It characterized in that it comprises a first point adjacent to the body portion and a second point wider than the first point.

In addition, the sustain electrode includes a transparent electrode and a bus electrode, the transparent electrode of the sustain electrode includes a body portion extending in a direction parallel to the bus electrode of the sustain electrode and a protrusion projecting toward the discharge cell center from the body portion. And a first point adjacent to the body portion and a second point wider than the first point.

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

4 is a view showing an electrode structure of the plasma display panel of the present invention.

As shown in FIG. 4, in the present invention, the area of the sustain electrode 403 positioned in the discharge cell 416 to compensate for the sustain electrode 403 which is relatively weak in discharge intensity is measured. Make it wider. That is, the area where the sustain electrode 403 overlaps with the discharge space of the discharge cell 416 is larger than the area where the scan electrode 402 overlaps with the discharge space of the discharge cell 416. Accordingly, the difference in luminance due to the difference in discharge intensity generated between the sustain electrode 403 and the scan electrode 402 can be eliminated.

In addition, the discharge efficiency is improved by preventing the power consumption from leaking out. As the above-described transparent electrodes a and c become wider, a gap between the transparent electrodes a and c located in the discharge cell is reduced. The smaller the gap between the electrodes, the lower the voltage required for discharge. When the discharge voltage is lowered, power consumption is reduced. As described above, the area where the transparent electrode c forming the discharge space and the sustain electrode 403 overlap with each other can be prevented from being weakened during discharge. In addition, the brightness of the light is also improved. The discharge intensity is discharged by varying the overlapping area of the transparent electrode (a) forming the scan electrode 402 of the plasma display panel having such an electrode structure and the overlapping area of the transparent electrode (c) forming the sustain electrode (403). Evenly generated in the discharge cell 416 will be described in detail with reference to FIG.

FIG. 5 is a view showing an even generation of discharge intensity in a discharge space in the electrode structure of the plasma display panel of the present invention.

In the electrode structure of FIG. 5, a scan electrode 402 and a sustain electrode 403 are formed on a front substrate (not shown), and the scan electrode 402 and the sustain electrode 403 are bus electrodes b in the discharge cell 416. , d) are formed at both points, and are formed to face each other with the center of the discharge cell 416 interposed therebetween. A plasma display panel having such an electrode structure has an area in which the transparent electrode (a) forming the scan electrode 402 overlaps with the discharge cell and an area in which the transparent electrode (c) forming the sustain electrode 403 overlaps with the discharge cell. The transparent electrode (c) formed differently, that is, the area where the transparent electrode (c) forming the aforementioned sustain electrode (403) in the discharge space overlaps with the discharge cell, forms the scan electrode (402) described above. It is formed larger than the overlapping area and in some cases is asymmetrical. The discharge intensity generated during the surface discharge of the electrode structure is uniformly generated in the discharge cell 416 and the efficiency is improved by adjusting the electrode area overlapping with the discharge space according to the above-described discharge intensity. In addition, since the discharge intensity is evenly generated in the discharge cell 416, the difference in luminance does not occur. An embodiment of such an electrode structure of the present invention is described in FIG.

6 is a view showing an embodiment of a transparent electrode of the scan electrode and the sustain electrode in the present invention.

As shown in FIG. 6, the scan electrode 402 and the sustain electrode 403 formed on the front substrate (not shown) each include a transparent electrode a and a bus electrode b. The transparent electrode a of the scan electrode 402 and the sustain electrode 403 forms a body portion extended in a direction parallel to the bus electrode b. In addition, the transparent electrodes a of the scan electrode 402 and the sustain electrode 403 are formed in the body to form protrusions protruding toward the center of the discharge cell 416. The protrusion may be represented by a first point adjacent to the body part and a second point spaced a predetermined distance from the body part, and the first point adjacent to the body part is wider than a second point spaced a predetermined distance from the body part. It is formed small. This is because the second point of the protrusion is more closely related to the discharge occurring in the discharge cell 416 than the first point of the protrusion. In other words, as the width of the protrusion protruding from the discharge cell 416 becomes wider, the charges necessary for the discharge are easily located in the transparent electrode a, which is the protrusion protruding portion. Therefore, stable discharge is caused by easily located charges and the voltage margin is improved. For this reason, the second point of the protrusion is formed with the first point wider. 7A through 7L are diagrams illustrating embodiments of various electrode structures of the present invention.

Such an electrode structure of the present invention shows various embodiments according to the invention in FIGS. 7A-7L.

7A to 7L illustrate an embodiment of an electrode structure positioned in a discharge space of a plasma display panel of the present invention.

As shown in FIG. 7A, the electrode structure of the plasma display panel according to the present invention is formed by the transparent electrodes a and c and the bus electrodes b and d arranged in a stripe type on a front substrate (not shown). This electrode is divided into a scan electrode 402 and a sustain electrode 403.

The transparent electrode a of the scan electrode 402 described above maintains a constant width of the protruding portion to the first point in a state in which one surface thereof is in contact with the bus electrode b of the scan electrode 402, and then after the first point. From then it increases and remains constant after the second point. As such, the shape of the overlapping area between the discharge space and the transparent electrode (a) forming the scan electrode 402 is changed, so that the area where the discharge space and the transparent electrode (b) forming the sustain electrode 403 overlap each other. It becomes wider. Therefore, the area of the transparent electrode a that forms the scan electrode 402 in the discharge space is relatively reduced, but the gap between the electrodes is reduced because the scan electrode 402 protrudes into the discharge space. As the gap between the electrodes is reduced, the voltage required for discharge is lowered, thereby reducing power consumption.

As shown in FIG. 7B, the electrode structure of the plasma display panel according to the present invention is formed by the transparent electrodes a and c and the bus electrodes b and d arranged in a stripe type on a front substrate (not shown). This electrode is divided into a scan electrode 402 and a sustain electrode 403.

As described above, the transparent electrode c of the sustain electrode 403 maintains the width of the protruding portion to a third point in a state in which one surface thereof is in contact with the bus electrode of the sustain electrode, and then increases after the third point and then increases to a fourth point. It remains constant after the point. The area of the sustain electrode 403 located in the discharge cell 416 is made larger than that of the scan electrode 402 in order to compensate for the sustain electrode 403 having relatively weak discharge intensity. In other words, by increasing the area where the transparent electrode c forming the discharge space and the sustain electrode 403 overlap, the discharge power is prevented from flowing out, and the discharge efficiency is improved. As such, the area where the discharge space and the transparent electrode c forming the sustain electrode 403 overlap with each other may be increased to prevent the discharge intensity from being weakened during discharge.

Referring to FIG. 7C, the scan electrode 402 and the sustain electrode 403 described above include the transparent electrodes a and c and the bus electrodes b and d, respectively, and the transparent electrode a of the scan electrode 402. The width of the protruding portion is increased to the first point while one surface of the scan electrode 402 is in contact with the bus electrode b of the scan electrode 402 and then decreases after the first point. As such, the shape of the area where the discharge space overlaps with the transparent electrode a forming the scan electrode 402 is changed, so that the area where the discharge space overlaps with the transparent electrode c forming the sustain electrode 403 overlaps. It becomes wider. Therefore, the area of the transparent electrode a that forms the scan electrode 402 in the discharge space is relatively reduced, but the gap between the electrodes is reduced because the scan electrode 402 protrudes into the discharge space. As the gap between the electrodes is reduced, the voltage required for discharge is lowered, thereby reducing power consumption.

Referring to FIG. 7D, the scan electrode 402 and the sustain electrode 403 described above include the transparent electrodes a and c and the bus electrodes b and d, respectively, and the transparent electrode a of the scan electrode 402. In the state in which one surface is in contact with the bus electrode b of the scan electrode 402, the width of the protruding portion increases to a first point and then remains constant after the first point. As such, the shape of the area where the discharge space overlaps the transparent electrode a forming the scan electrode is changed so that the area where the discharge space overlaps the transparent electrode c forming the sustain electrode 403 becomes relatively large. . Therefore, the area of the transparent electrode a that forms the scan electrode 402 in the discharge space is relatively reduced, but the gap between the electrodes is reduced because the scan electrode 402 protrudes into the discharge space. As the gap between the electrodes is reduced, the voltage required for discharge is lowered, thereby reducing power consumption.

Referring to FIG. 7E, the width of the protruding portion of the transparent electrode c of the aforementioned sustain electrode 403 increases to a third point in a state where one surface thereof is in contact with the bus electrode b of the sustain electrode 403. After 3 points, it remains constant. The area of the sustain electrode 403 located in the discharge cell 416 is made larger than that of the scan electrode 402 in order to compensate for the sustain electrode 403 having relatively weak discharge intensity. In other words, by increasing the area where the transparent electrode c forming the discharge space and the sustain electrode 403 overlap, the discharge power is prevented from flowing out, and the discharge efficiency is improved. As described above, the area where the transparent electrode c forming the discharge space and the sustain electrode 403 overlap with each other can be prevented from weakening the discharge intensity during discharge.

Referring to FIG. 7F, the scan electrode 402 and the sustain electrode 403 described above include the transparent electrodes a and c and the bus electrodes b and d, respectively, and the transparent electrode a of the scan electrode 402. The width of the protruding portion decreases to the first point in the state where the silver surface is in contact with the bus electrode b of the scan electrode 402. As such, the shape of the area where the discharge space overlaps with the transparent electrode a forming the scan electrode 402 is changed, so that the area where the discharge space overlaps with the transparent electrode c forming the sustain electrode 403 is relatively overlapped. It becomes wider. Accordingly, the area of the transparent electrode a that forms the scan electrode 402 in the discharge space is reduced, but the gap between the electrodes is reduced because the scan electrode 402 protrudes into the discharge space. As the gap between the electrodes is reduced, the voltage required for discharge is lowered, thereby reducing power consumption.

Referring to FIG. 7G, the scan electrode 402 and the sustain electrode 403 described above include transparent electrodes a and c and bus electrodes b and d, respectively, and the transparent electrode a of the scan electrode 402 The width of the protruding portion is increased to the first point while one surface is in contact with the bus electrode b of the scan electrode 402. As such, the shape of the area where the discharge space overlaps with the transparent electrode a forming the scan electrode 402 is changed, so that the area where the discharge space overlaps with the transparent electrode c forming the sustain electrode 403 is relatively overlapped. It becomes wider. Accordingly, the area of the transparent electrode a that forms the scan electrode 402 in the discharge space is reduced, but the gap between the electrodes is reduced because the scan electrode 402 protrudes into the discharge space. As the gap between the electrodes is reduced, the voltage required for discharge is lowered, thereby reducing power consumption.

Referring to FIG. 7H, the width of the protruding portion of the transparent electrode c of the aforementioned sustain electrode 403 is increased to a third point in a state where one surface thereof is in contact with the bus electrode d of the sustain electrode 403. The area of the sustain electrode 403 located in the discharge cell 416 is made larger than that of the scan electrode 402 in order to compensate for the sustain electrode 403 having relatively weak discharge intensity. In other words, by increasing the area where the transparent electrode c forming the discharge space and the sustain electrode 403 overlap, the discharge power is prevented from flowing out, and the discharge efficiency is improved. As described above, the area where the transparent electrode c forming the discharge space and the sustain electrode 403 overlap with each other can be prevented from weakening the discharge intensity during discharge.

Referring to FIG. 7I, the scan electrode 402 and the sustain electrode 403 described above include the transparent electrodes a and c and the bus electrodes b and d, respectively, and the transparent electrode a of the scan electrode 402. The width of the protruding portion decreases to the first point while one surface of the scan electrode 402 is in contact with the bus electrode b of the scan electrode 402, and then remains constant after the first point. As such, the shape of the area where the discharge space overlaps with the transparent electrode a forming the scan electrode 402 is changed, so that the area where the discharge space overlaps with the transparent electrode c forming the sustain electrode 403 is relatively overlapped. It becomes wider. Therefore, the area of the transparent electrode a which forms the scan electrode 402 in the discharge space is relatively reduced, but the gap between the electrodes is reduced because the scan electrode 402 protrudes into the discharge space. As the gap between the electrodes is reduced, the voltage required for discharge is lowered, thereby reducing power consumption.

As such, the technical configuration of the present invention described above can be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the foregoing detailed description, and the meaning and scope of the claims are as follows. And all changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above in detail, the present invention improves the structure of the scan electrode and the sustain electrode of the plasma display panel, thereby improving luminance and luminous efficiency.

Claims (8)

Scan electrode, A sustain electrode formed in a direction parallel to the scan electrode and having a different area from the scan electrode in a discharge cell; Including, And an area of the scan electrode is smaller than an area of the sustain electrode in the discharge cell. delete The method of claim 1, The scan electrode and the sustain electrode are each made of a transparent electrode and a bus electrode, And an area of the transparent electrode of the scan electrode in the discharge cell is smaller than an area of the transparent electrode of the sustain electrode. The method according to claim 1 or 3, And the shape of the scan electrode and the shape of the sustain electrode are asymmetrical. The method of claim 1, And the scan electrode protrudes toward the center of the discharge cell and is smaller than an area of the sustain electrode. The method of claim 1, And the sustain electrode protrudes toward the center of the discharge cell and is wider than an area of the scan electrode. The method of claim 1, The scan electrode includes a transparent electrode and a bus electrode, The transparent electrode of the scan electrode, A body portion extended in a direction parallel to the bus electrode of the scan electrode; Protruding portion protruding from the body portion toward the center of the discharge cell, The protrusion includes a first point adjacent the body portion; And a second point wider than the first point. The method according to claim 1 or 7, The sustain electrode includes a transparent electrode and a bus electrode, The transparent electrode of the sustain electrode, A body portion extended in a direction parallel to the bus electrode of the sustain electrode; Protruding portion protruding from the body portion toward the center of the discharge cell, The protrusion includes a first point adjacent the body portion; And a second point wider than the first point.

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