KR100811529B1 - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to improve image quality by preventing a discharge process from being performed at a dummy area. A plasma display panel includes a front substrate(101), a rear substrate(111), and a barrier rib(112). First and second electrodes are arranged on the front substrate. A third electrode, which crosses the first and second electrodes, is arranged on the rear substrate. The barrier rib defines discharge cells between the front and rear substrates. In an active area, one of the first and second electrodes includes a line unit and a protrusion. The line unit crosses the third electrode. The protrusion is protruded from the line unit. The protrusion is removed at a dummy area, which is arranged outside the active area.

Description

Plasma Display Panel

1 is a view for explaining the structure of a plasma display panel according to an embodiment of the present invention.

2 is a diagram for explaining a first electrode and a second electrode.

3A to 3B are diagrams for explaining the dummy region and the effective region.

4A to 4B are views for explaining the structural difference between the first electrode and the second electrode in the dummy region and the effective region.

5A to 5B are views for explaining the reason why the protrusion is omitted in the dummy region.

FIG. 6 is a diagram for explaining another structure of the first electrode and the second electrode; FIG.

FIG. 7 is a diagram for explaining a case in which at least one of the first electrode and the second electrode includes a tail portion. FIG.

8 is a view for explaining another structure of the first electrode and the second electrode.

FIG. 9 is a diagram for describing an image frame for implementing gray levels of an image in a plasma display panel according to an embodiment of the present invention. FIG.

10 is a view for explaining an example of an operation of a plasma display panel according to an embodiment of the present invention in a subfield included in an image frame;

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

101: front substrate 102: first electrode

103: second electrode 104: upper dielectric layer

105: protective layer 111: back substrate

112: partition wall 113: third electrode

114: phosphor layer 115: lower dielectric layer

112a: second partition 112b: first partition

The present invention relates to a plasma display panel.

In general, a phosphor layer is formed in a discharge cell (Cell) partitioned by a partition, and a plurality of electrodes are formed in the plasma display panel.

The driving signal is supplied to the discharge cell through the electrode.

Then, the discharge is generated by the drive signal supplied in the discharge cell. Here, when discharged by a drive signal in the discharge cell, the discharge gas filled in the discharge cell generates vacuum ultraviolet rays, and the vacuum ultraviolet light emits the phosphor formed in the discharge cell to emit visible light. Generate. The visible light displays an image on the screen of the plasma display panel.

One embodiment of the present invention is to provide a plasma display panel to ensure that the aging (Aging) is evenly carried out throughout the panel, and to prevent the discharge from occurring in the dummy area outside the active area during driving. Its purpose is to.

According to an embodiment of the present invention, a plasma display panel includes a front substrate on which first and second electrodes parallel to each other are disposed, and a third electrode intersecting the first and second electrodes is disposed. A barrier rib that partitions a discharge cell between the rear substrate and the front substrate and the rear substrate, wherein at least one of the first electrode and the second electrode in the active area crosses the third electrode; The protrusion is omitted from the dummy area that includes a protrusion protruding from the effective area and is disposed outside the effective area.

In addition, at least one of the first electrode and the second electrode is a single layer.

In addition, at least one of the first electrode and the second electrode in at least one of the dummy region and the effective region further includes a connecting portion connecting two or more of the line portions.

Further, the spacing between the first electrode and the second electrode in the dummy region is greater than the spacing between the first electrode and the second electrode in the effective region.

In addition, at least one of the first electrode and the second electrode in at least one of the dummy region and the effective region further includes a tail portion protruding from the line portion in a direction different from the projecting direction of the protrusion.

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

1 is a view for explaining the structure of a plasma display panel according to an embodiment of the present invention.

Referring to FIG. 1, a plasma display panel according to an embodiment of the present invention may face the front substrate 101 and the front substrate 101 on which the first and second electrodes 102 and 103 are arranged in parallel with each other. The rear substrate 111 on which the third electrode 113 disposed and intersects the first electrode 102 and the second electrode 103 is disposed is bonded to each other.

On top of the front substrate 101 where the first electrode 102 and the second electrode 103 are disposed, a dielectric layer covering the first electrode 102 and the second electrode 103, for example, an upper dielectric layer 104, is provided. Can be arranged.

This upper dielectric layer 104 limits the discharge current of the first electrode 102 and the second electrode 103 and can insulate between the first electrode 102, Y and the second electrode 103, Z. have.

A protective layer 105 may be disposed on the upper surface of the upper dielectric layer 104 to facilitate a discharge condition. The protective layer 105 may include a material having a high secondary electron emission coefficient, such as magnesium oxide (MgO).

Meanwhile, an electrode, for example, a third electrode 113 is disposed on the rear substrate 111, and a dielectric layer covering the third electrode 113 is disposed on the rear substrate 111 on which the third electrode 113 is disposed. Dielectric layer 115 may be disposed.

The lower dielectric layer 115 may insulate the third electrode 113.

In addition, a partition 112 having a discharge space, that is, a stripe type, a well type, a delta type, a honeycomb type, and the like, which partitions a discharge cell, is formed on an upper portion of the lower dielectric layer 115. Can be arranged. Accordingly, red (R), green (G), and blue (B) discharge cells may be provided between the front substrate 101 and the rear substrate 111.

In addition, in addition to the red (R), green (G), and blue (B) discharge cells, white (W) or yellow (Yellow: Y) discharge cells may be further provided.

Meanwhile, although the widths of the red (R), green (G), and blue (B) discharge cells in the plasma display panel according to an embodiment of the present invention may be substantially the same, red (R) and green (G) may be substantially the same. And the width of at least one of the blue (B) discharge cells may be different from that of the other discharge cells.

For example, the width of the red (R) discharge cell is the smallest, and the width of the green (G) and blue (B) discharge cells can be made larger than the width of the red (R) discharge cell. Here, the width of the green (G) discharge cell may be substantially the same as or different from the width of the blue (B) discharge cell.

The width of the phosphor layer 114, which will be described later, disposed in the discharge cell is then changed in relation to the width of the discharge cell. For example, the width of the blue (B) phosphor layer disposed in the blue (B) discharge cell is wider than the width of the red (R) phosphor layer disposed in the red (R) discharge cell, and at the same time in the green (G) discharge cell. The width of the green (G) phosphor layer disposed may be wider than the width of the red (R) phosphor layer disposed in the red (R) discharge cell.

Then, color temperature characteristics of the image to be implemented may be improved.

In addition, the plasma display panel according to the exemplary embodiment of the present invention may have not only the structure of the partition wall 112 shown in FIG. 1 but also the structure of the partition wall having various shapes. For example, the partition wall 112 includes a first partition wall 112b and a second partition wall 112a, where the height of the first partition wall 112b and the height of the second partition wall 112a are different from each other. Etc. may be possible.

In the case of the differential partition wall structure, the height of the first partition wall 112b among the first partition wall 112b or the second partition wall 112a may be lower than the height of the second partition wall 112a.

Meanwhile, although FIG. 1 shows and describes each of the red (R), green (G), and blue (B) discharge cells arranged on the same line, it may be arranged in a different shape. For example, a delta type arrangement in which red (R), green (G) and blue (B) discharge cells are arranged in a triangular shape may be possible. In addition, the shape of the discharge cell may also be a variety of polygonal shapes, such as pentagonal, hexagonal, as well as rectangular.

In addition, in FIG. 1, only the case where the partition wall 112 is formed on the rear substrate 111 is illustrated, but the partition wall 112 may be disposed on at least one of the front substrate 101 and the rear substrate 111.

Here, a predetermined discharge gas may be filled in the discharge cell partitioned by the partition wall 112.

In addition, a phosphor layer 114 that emits visible light for image display may be disposed in the discharge cell partitioned by the partition wall 112. For example, red (R), green (G), and blue (B) phosphor layers may be disposed.

In addition to the red (R), green (G), and blue (B) phosphors, a white (W) and / or yellow (Y) phosphor layer may be further disposed.

In addition, the thickness of the phosphor layer 114 in at least one of the red (R), green (G), and blue (B) discharge cells may be different from other discharge cells. For example, the thickness of the phosphor layer of the green (G) discharge cell, ie the phosphor layer in the green (G) phosphor layer or the blue (B) discharge cell, ie the blue (B) phosphor layer, is It may be thicker than the thickness of the phosphor layer, ie the red (R) phosphor layer. Here, the thickness of the green (G) phosphor layer may be substantially the same as or different from the thickness of the blue (B) phosphor layer.

In the above description, only one example of the plasma display panel according to an exemplary embodiment of the present invention is illustrated and described. However, the present invention is not limited to the plasma display panel having the above-described structure. For example, the above description shows only the case where the upper dielectric layer number 104 and the lower dielectric layer number 115 are each one layer, but one or more of the upper dielectric layer or the lower dielectric layer is a plurality of layers. It is also possible to make.

In addition, a black matrix (not shown) may be further disposed on the partition 112 to prevent reflection of external light due to the partition 112. In addition, the black layer may be formed at a specific position on the front substrate 101 corresponding to the partition wall 112.

In addition, the width and thickness of the third electrode 113 disposed on the rear substrate 111 may be substantially constant, but the width or thickness inside the discharge cell may be different from the width or thickness outside the discharge cell. There will be. For example, the width or thickness inside the discharge cell may be wider or thicker than that outside the discharge cell.

Next, FIG. 2 is a diagram for explaining the first electrode and the second electrode.

Referring to FIG. 2, at least one of the first electrode 102 or the second electrode 103 is a single layer. For example, at least one of the first electrode 102 or the second electrode 103 may be an ITO-Less electrode.

At least one of the first electrode 102 or the second electrode 103 may include a substantially opaque electrically conductive metal material. For example, it may include a material having excellent electrical conductivity such as silver (Ag), copper (Cu), aluminum (Al), etc., and having a lower cost than a transparent material such as indium tin oxide (ITO). Accordingly, the manufacturing cost can be reduced.

In addition, when at least one of the first electrode 102 or the second electrode 103 is a single layer, at least one of the first electrode 102 or the second electrode 103 is a plurality of layers (Multi-Layer) In comparison, the manufacturing cost can be reduced by reducing the number of manufacturing processes and the time required for the manufacturing process.

Meanwhile, the discoloration of the front substrate 101 is prevented between at least one of the first electrode 102 and the second electrode 103 and the front substrate 101, and the first electrode 102 and the second electrode 103 are prevented. Black layers having a darker color than at least one of the colors (Black Layer: 200a, 200b) may be further disposed.

For example, when the front substrate 101 is in direct contact with the first electrode 102 or the second electrode 103, the front substrate 101 is in direct contact with the first electrode 102 or the second electrode 103. Migration may occur when a certain area of the color layer is discolored to yellow, and the black layers 200a and 200b are in direct contact with the front substrate 101 and the first electrode 102 or the second electrode 103. It is possible to prevent the phenomena by preventing the phenomenon.

The black layers 200a and 200b may include a black material having a substantially dark color, for example, ruthenium (Ru).

As such, when the black layers 200a and 200b are provided between the front substrate 101 and the first electrode 102 and the second electrode 103, the first electrode 102 and the second electrode 103 are provided. Even if the reflectance is made of a relatively high material, the generation of reflected light can be prevented.

3A to 3B are diagrams for explaining the dummy region and the effective region.

3A to 3B, the plasma display panel includes an active area 30 in which an image is displayed and a dummy area 31 not contributing to the image display. Here, the effective area 30 is an area where an image is displayed by generating a predetermined visible light when driving.

The dummy region 31 is disposed outside the effective region 30. The dummy region 31 may be formed to ensure structural stability of the effective region 30 or to secure driving stability in the effective region.

The phosphor layer may not be formed in the discharge cells formed in the dummy region 31, that is, the dummy discharge cells.

In addition, as shown in FIG. 3B, at least one structure of the first electrode 102 or the second electrode 103 in the effective region is at least one of the first electrode 102 or the second electrode 103 in the dummy region. Is different from the structure.

The structural difference between the first electrode or the second electrode 103 in the effective region and the first electrode or the second electrode in the dummy region will be described with reference to FIGS. 4A to 4B.

4A to 4B are diagrams for explaining the structural difference between the first electrode and the second electrode in the dummy region and the effective region.

First, the structure of the first electrode and the second electrode in the effective region will be described with reference to FIG. 4A.

Referring to FIG. 4A, at least one of the first electrode 102 or the second electrode 103 may include line portions 310a, 310b, 350a, and 350b crossing the third electrode 390, and the line portions 310a, Protruding portions 320a and 320b protruding from 310b, 350a and 350b, and connecting portions 330 and 370 connecting two or more of line portions 310a, 310b, 350a and 350b.

Here, the line portions 310a, 310b, 350a, and 350b have a predetermined width, for example, the first line portion 310a of the first electrode 102 has a width of W1 and the second line portion ( 310b has a width of W2, the first line portion 350a of the second electrode 103 has a width of W3, and the second line portion 350b has a width of W4.

Here, W1, W2, W3, and W4 may have substantially the same value, and one or more may have different values. For example, the widths W1 and W3 of the first line portion 310a of the first electrode 102 and the first line portion 350a of the second electrode 103 are the second line portions 310b and 350b. It may be larger than the width W2, W4.

In addition, the line portions 310a, 310b, 350a, and 350b are spaced apart from each other at predetermined intervals. For example, the first line portion 310a and the second line portion 310b of the first electrode 102 are spaced apart at intervals of g4 and the first line portion 350a of the second electrode 103. And the second line part 350b are spaced apart from each other at intervals of g5.

Here, g4 and g5 may be substantially the same or may be different from each other.

Protrusions 320a. 320b, 360a, 360b protrude from line portions 310a, 310b, 350a, 350b. For example, the protrusions 320a and 320b of the first electrode 102 protrude from the first line portion 310a of the first electrode 102 toward the discharge cell center and the protrusions of the second electrode 103. 360a and 360b may protrude from the first line part 350a of the second electrode 103 toward the center of the discharge cell.

Here, the protrusions 320a, 320b, 360a, and 360b are spaced apart from each other by a predetermined distance. For example, the projection 320a and the projection 320b of the first electrode 102 are spaced apart by the interval g1, and the projection 360d and the projection of the number 360b of the second electrode 103 are spaced apart by the interval g2. do.

Here, the intervals g1 and g2 between the protrusions 320a. 320b, 360a, and 360b are preferably 60 µm or more and 120 µm or less in order to sufficiently secure discharge efficiency.

In addition, the protrusions 320a and 320b of the first electrode 102 and the protrusions 360a and 360b of the second electrode 103 are spaced apart from each other at intervals of g3. In the case of FIG. 4A, the interval g3 between the protrusions 320a and 320b of the first electrode 102 and the protrusions 360a and 360b of the second electrode 103 is defined by the first electrode 102 and the second electrode ( 103).

The protrusions 320a and 320b protruding from the first line part 310a of the first electrode 102 and the protrusions 360a and 360b protruding from the first line part 350a of the second electrode 103 are described. Discharge occurs between.

The connection parts 330 and 370 connect two or more of the line parts 310a, 310b, 350a, and 350b. For example, the connection portion 330 of the first electrode 102 connects the first line portion 310a and the second line portion 310b of the first electrode 102 and the connection portion of the second electrode 103. 370 connects the first line part 350a and the second line part 350b of the second electrode 103. Accordingly, the first line portion 310a of the first electrode 102 and the second line portion 310b are electrically connected to each other, and the first line portions 350a and 350b of the second electrode 103 are electrically connected to each other. Connected.

The connection parts 330 and 370 protrude from the first line part 350a of the second electrode 103 and the protrusions 320a and 320b protruding from the first line part 310a of the first electrode 102. The discharge generated between the protrusions 360a and 360b is more effectively diffused in the direction of the second line portions 310b and 350b, that is, behind the discharge cell partitioned by the partition 300.

Next, the structure of the first electrode and the second electrode in the dummy region will be described with reference to FIG. 4B.

Referring to FIG. 4B, the first electrode 102 and the second electrode 103 are disposed in the dummy area, and the protrusions 320a, 320b, 360a, and 360b in the effective area are omitted. That is, at least one of the first electrode 102 or the second electrode 103 in the dummy region may have the line portions 310a, 310b, 350a, and 350b crossing the third electrode 390 and the line portions 310a and 310b. , A connection part 330, 370 connecting two or more of the parts 350a, 350b, and the protrusions 320a, 320b, 360a, and 360b are omitted.

Accordingly, the distance g6 between the first electrode 102 and the second electrode 103 in the dummy region is the distance g3 between the first electrode 102 and the second electrode 103 in the effective region. Greater than

As described above, referring to FIGS. 5A to 5B, the reason why the protrusion is omitted from the first electrode or the second electrode in the dummy region is as follows.

5A to 5B are views for explaining a reason for omitting the protrusions in the dummy region.

5A illustrates a case in which one of the first electrode and the second electrode is omitted in the dummy region.

In this case, no discharge occurs between the first electrode and the second electrode in the dummy region.

Meanwhile, the manufacturing process of the plasma display panel includes an aging process. This aging process is performed to remove the impurity gas in the panel and to stabilize the phosphor layer disposed in the discharge gas and the discharge cell injected into the panel after the discharge gas is injected into the panel.

In this aging process, the discharge gas and the phosphor layer are stabilized by applying a relatively high voltage to the first electrode and the second electrode to generate a discharge between the first electrode and the second electrode.

Here, if one of the first electrode and the second electrode is omitted in the dummy region as in the case of FIG. 5A, no discharge occurs even in aging in the dummy discharge region. The discharge generated at the time of aging is referred to as aging discharge.

In this manner, if aging discharge does not occur in the dummy region, the discharge gas existing in the dummy region is also not sufficiently stabilized. As a result, when the discharge gas in the dummy region which is not stabilized during driving is diffused into the effective region, the discharge in the effective region becomes unstable. For example, the discharge gas in the discharge cells adjacent to the dummy region is not stabilized, resulting in a problem that the discharge cells adjacent to the dummy region are not lit.

Next, FIG. 5B shows a case where the structures of the first electrode and the second electrode in the dummy region and the first electrode and the second electrode in the effective region are substantially the same. That is, in the dummy region, the first electrode and the second electrode include a line portion and a protrusion.

In this case, aging discharge occurs in the dummy region, and thus, the discharge gas existing in the dummy region can be sufficiently stabilized as in the effective region.

On the other hand, in the case of FIG. 5B, since at least one of the first electrode and the second electrode includes the protrusion in the dummy region as in the effective region, the same discharge occurs in the dummy region during driving as in the effective region. As a result, light is generated in the dummy area that does not contribute to the image display, thereby causing a problem that the size of the effective area is reduced. In addition, the image quality of the image may be deteriorated by interference of light generated in the effective area in the dummy area.

On the other hand, as shown in FIGS. 4A to 4B, when the first electrode and the second electrode include protrusions in the effective area, and the protrusions are omitted in the dummy area, the gap between the first electrode and the second electrode in the dummy area may be reduced. The gap g6 becomes larger than the gap g3 between the first electrode and the second electrode in the effective area, so that no discharge occurs between the first electrode and the second electrode during driving, so that the size of the effective area The image quality can be improved by preventing the image from appearing small or deteriorating the image quality.

Here, although the protrusion is omitted in the dummy region, the first electrode and the second electrode include the line portion. Accordingly, in the aging process of supplying a relatively high voltage to the first electrode and the second electrode, discharge may occur between the first electrode and the second electrode. Thereby, the discharge gas which exists in a dummy area can also be fully stabilized.

In other words, if the projection is omitted from the dummy region, aging discharge is generated in the dummy region, thereby aging sufficiently to stabilize the discharge. This can be prevented from occurring to improve the image quality of the image.

Next, FIG. 6 is a diagram for explaining another structure of the first electrode and the second electrode.

Referring to FIG. 6, a connection part of at least one of the first electrode 102 and the second electrode 103 may be omitted. That is, the first electrode 102 or the second electrode 103 may also include a connecting portion connecting two or more of the line portions 310a, 310b, 350a, and 350b, as shown in FIG. 6. May be omitted.

As such, when the connection part is omitted, the distance between the line parts 310a, 310b, 350a, and 350b may be relatively narrowed. For example, the first line portion 310a and the second line portion 310b of the first electrode 102 are spaced apart from each other at a distance of g7 smaller than g4 in FIG. 4A, and the second electrode 103 may be spaced apart from each other. The first line part 350a and the second line part 350b may be spaced apart from each other at intervals of g8 smaller than g5 of FIG. 4A.

As such, when the distance between the line portions 310a, 310b, 350a, and 350b is relatively narrowed, the discharge can be stably diffused to the rear of the discharge cell without the connection portion.

Meanwhile, in FIG. 6, only the effective region including the protrusions 320a, 320b, 360a, and 360b of the first electrode 102 and the second electrode 103 is described. It is possible.

Next, FIG. 7 is a diagram for describing a case in which at least one of the first electrode and the second electrode includes a tail portion.

Referring to FIG. 7, at least one of the first electrode 102 and the second electrode 103 further includes tails 700 and 710.

The tail parts 700 and 710 may protrude in a direction opposite to the protruding directions of the protrusions 320a, 320b, 360a, and 360b. For example, the tail portion 700 of the first electrode 102 protrudes from the second line portion 310b to the rear of the discharge cell in a direction opposite to the protrusion direction of the protrusions 320a and 320b of the first electrode 102. The tail portion 710 of the second electrode 103 protrudes from the second line portion 350b to the rear of the discharge cell opposite to the protrusion direction of the protrusions 360a and 360b of the second electrode 103.

As such, when at least one of the first electrode 102 or the second electrode 103 further includes the tails 700 and 710, the discharge may be more effectively diffused to the rear of the discharge cell. Accordingly, the discharge can be spread more widely, and the driving efficiency can be improved.

Meanwhile, in FIG. 7, only the effective region in which the first electrode 102 and the second electrode 103 include protrusions 320a, 320b, 360a, and 360b is described. However, the tail portion is further included in the dummy region. It is also possible.

Next, FIG. 8 is a diagram for explaining another structure of the first electrode and the second electrode.

Referring to FIG. 8, the protrusions 320a, 320b, 360a, and 360b include portions having curvatures. As such, the formation of the first electrode 102 and the second electrode 103 may be easier. In addition, it is possible to prevent the wall charge from being excessively concentrated in a specific position during driving, thereby improving the driving stability by stabilizing the discharge characteristics.

For example, in the case where the protrusion is formed in a rectangular shape, wall charges may be excessively concentrated in an uncontrollable manner at most corners of the protrusion when driving. Accordingly, the corner portions of the protrusions may be destroyed due to electrical damage or control of discharge may be relatively difficult.

On the other hand, in the case where the protrusions 320a, 320b, 360a, and 360b include curvatures, as shown here in FIG. 8, the wall charges are not excessively concentrated in a specific portion during driving, and the protrusions 320a, 320b, and 360a , 360b) evenly distributed throughout. Accordingly, the discharge control may be facilitated such as to protect the protrusions 320a, 320b, 360a, and 360b from electrical damage and to adjust the timing of the occurrence of the discharge.

In addition, it is possible to have a curvature in the vicinity of the connection point of the line portions 310a, 310b, 350a, 350b and the connecting portion 330, 370.

Next, FIG. 9 is a diagram for describing an image frame for implementing gray levels of an image in a plasma display panel according to an embodiment of the present invention.

Referring to FIG. 9, an image frame for implementing gray levels of an image in a plasma display panel according to an embodiment of the present invention may be divided into a plurality of subfields having different emission counts.

Although not shown, one or more subfields among the plurality of subfields may be grayed out according to a reset period for initializing discharge cells, an address period for selecting discharge cells to be discharged, and the number of discharges. It can be divided into the sustain period to implement.

For example, in the case of displaying an image with 256 gray levels, for example, one image frame is divided into eight subfields SF1 through SF8 as shown in FIG. 9, and each of the eight subfields SF1 through SF8 is represented. Can be divided into a reset period, an address period, and a sustain period.

The gray scale weight of the corresponding subfield may be set by adjusting the number of the sustain signals supplied in the sustain period. That is, a predetermined gray scale weight can be given to each subfield using the sustain period. For example, the gray scale weight of each subfield is 2 ⁿ by setting the gray scale weight of the first subfield to 2 ⁰ and the gray scale weight of the second subfield to 2 ¹ (where n = 0, 1). , 2, 3, 4, 5, 6, and 7) to increase the gray scale weight of each subfield. As described above, the number of sustain signals supplied in the sustain period of each subfield is adjusted according to the gray scale weight in each subfield, thereby implementing gray levels of various images.

A plasma display panel according to an embodiment of the present invention uses a plurality of image frames to implement an image, for example, to display an image of 1 second. For example, 60 image frames are used to display an image of 1 second. In this case, the length T of one image frame may be 1/60 second, that is, 16.67 ms.

In FIG. 9, only one image frame is composed of eight subfields. However, the number of subfields constituting one image frame may be variously changed. For example, one video frame may be configured with 12 subfields from the first subfield to the twelfth subfield, or one video frame may be configured with 10 subfields.

In addition, in FIG. 9, subfields are arranged in an order of increasing magnitude of gray scale weight in one image frame. Alternatively, subfields may be arranged in order of decreasing gray scale weight in one image frame. Alternatively, subfields may be arranged regardless of the gray scale weight.

Next, FIG. 10 is a view for explaining an example of an operation of a plasma display panel according to an embodiment of the present invention in a subfield included in an image frame.

Referring to FIG. 10, in the set-up period of the reset period for initialization, the voltage rises from the first voltage V1 to the second voltage V2 with the first electrode and then from the second voltage V2 to the third voltage. A ramp-up signal is supplied in which the voltage gradually rises to V3. Here, the first voltage V1 may be a voltage of the ground level GND.

In this setup period, a weak dark discharge, that is, setup discharge, occurs in the discharge cell by the rising ramp signal. By this setup discharge, some wall charges can be accumulated in the discharge cells.

In a set-down period after the setup period, a ramp-down signal in a direction opposite to that of the ramp ramp signal is supplied to the first electrode after the ramp ramp signal.

Here, the falling ramp signal may gradually fall from the peak voltage of the rising ramp signal, that is, the fourth voltage V4 lower than the third voltage V3 to the fifth voltage V5.

As the falling ramp signal is supplied, a weak erase discharge, that is, a setdown discharge, occurs in the discharge cell. By this set-down discharge, wall charges such that address discharge can be stably generated in the discharge cells remain uniformly.

In the address period after the reset period, a scan bias signal that substantially maintains the lowest voltage of the falling ramp signal, that is, a voltage higher than the fifth voltage V5, for example, the sixth voltage V6, is supplied to the first electrode.

In addition, a scan signal falling by a scan voltage (Vy) from the scan bias signal may be supplied to the first electrode.

On the other hand, the width of the scan signal in units of subfields may vary. That is, the width of the scan signal in at least one subfield may be different from the width of the scan signal in another subfield. For example, the width of the scan signal in the subfield located later in time may be smaller than the width of the scan signal in the preceding subfield. In addition, the reduction of the scan signal width according to the arrangement order of the subfields may be made gradually, such as 2.6 ms (microseconds), 2.3 ms (microseconds), 2.1 ms (microseconds), 1.9 ms (microseconds), or 2.6. ㎲ (microseconds), 2.3 ㎲ (microseconds), 2.3 ㎲ (microseconds), 2.1 ㎲ (microseconds) ... 1.9 ㎲ (microseconds), 1.9 ㎲ (microseconds), etc. will be.

As such, when the scan signal is supplied to the first electrode, a data signal that rises by the magnitude of the data voltage (Vd) may be supplied to the third electrode to correspond to the scan signal.

As the scan signal and the data signal are supplied, the voltage difference between the scan signal and the data signal and the wall voltage due to the wall charges generated in the reset period are added, and an address discharge is generated in the discharge cell to which the data signal is supplied. Can be.

Here, the sustain bias signal may be supplied to the second electrode to prevent the address discharge from becoming unstable due to the interference of the second electrode in the address period.

Here, the sustain bias signal may maintain a substantially constant sustain bias voltage Vz smaller than the voltage of the sustain signal supplied in the sustain period and greater than the voltage of the ground level GND.

Thereafter, in the sustain period for displaying an image, a sustain signal may be supplied to at least one of the first electrode and the second electrode. For example, a sustain signal may be alternately supplied to the first electrode and the second electrode.

When such a sustain signal is supplied, the discharge cell selected by the address discharge is sustained discharge between the first electrode and the second electrode when the sustain signal is supplied while the wall voltage in the discharge cell and the sustain voltage Vs of the sustain signal are added. , Display discharge may occur.

In this way, an image may be implemented on the screen of the plasma display panel.

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.

For example, in the above description, the first electrode and the second electrode are shown and described as including two line portions, respectively, but the first electrode and the second electrode may also include three and four line portions. .

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 in detail above, the plasma display panel according to the exemplary embodiment of the present invention omits a protrusion of at least one of the first electrode and the second electrode from the dummy region to sufficiently age the dummy region to stabilize the discharge and at the time of driving. In the dummy region, there is an effect of improving image quality by preventing discharge from occurring.

Claims (5)

A front substrate on which the first electrode and the second electrode parallel to each other are disposed; A rear substrate on which a third electrode intersects the first electrode and the second electrode; And Barrier ribs defining a discharge cell between the front substrate and the rear substrate; Including, At least one of the first electrode and the second electrode in the active area A line portion intersecting the third electrode; Protruding portion protruding from the line portion Including, In the dummy area disposed outside the effective area The projection display panel is omitted. The method of claim 1, And at least one of the first electrode and the second electrode is a single layer. The method of claim 1, At least one of the first electrode or the second electrode in at least one of the dummy region or the effective region And a connection unit connecting two or more of the line units. The method of claim 1, And a gap between the first electrode and the second electrode in the dummy area is larger than a gap between the first electrode and the second electrode in the effective area. The method of claim 1, At least one of the first electrode or the second electrode in at least one of the dummy region or the effective region And a tail portion protruding from the line portion in a direction different from that of the protrusion portion.

Images