Patent Grant
8471468
This application claims the benefit of Korean Patent Application Nos. 10-2010-0002312 filed on Jan. 11, 2010 and 10-2010-0003902 filed on Jan. 15, 2010, which are incorporated herein by reference for all purposes as if fully set forth herein.
1. Field of the Invention
Embodiments of the invention relate to a plasma display panel and a multi plasma display panel.
2. Description of the Related Art
A plasma display panel includes a phosphor layer inside discharge cells partitioned by barrier ribs and a plurality of electrodes.
When driving signals are applied to the electrodes of the plasma display panel, a discharge occurs inside the discharge cells. More specifically, when the discharge occurs in the discharge cells by applying the driving signals to the electrodes, a discharge gas filled in the discharge cells generates vacuum ultraviolet rays, which thereby cause phosphors between the barrier ribs to emit visible light. An image is displayed on the screen of the plasma display panel using the visible light.
In one aspect, there is a plasma display panel comprising a front substrate, a back substrate positioned opposite the front substrate, and a plurality of barrier ribs positioned between the front substrate and the back substrate, the plurality of barrier ribs configured to partition a plurality of discharge cells, wherein first and second discharge cells are positioned in an active area of the plasma display panel, and a size of the first discharge cell is less than a size of the second discharge cell closer to an edge region of the plasma display panel than the first discharge cell.
In another aspect, there is a plasma display panel comprising a front substrate on which a plurality of front electrodes are disposed, a back substrate on which a plurality of address electrodes are disposed to cross the plurality of front electrodes, and a plurality of barrier ribs positioned between the front substrate and the back substrate, the plurality of barrier ribs configured to partition a plurality of discharge cells, wherein a width of the address electrode in a first region of the plasma display panel is less than a width of the address electrode in a second region positioned outside the first region.
In yet another aspect, there is a plasma display panel comprising a front substrate on which a plurality of front electrodes are disposed, a back substrate on which a plurality of address electrodes are disposed to cross the plurality of front electrodes, and a plurality of barrier ribs positioned between the front substrate and the back substrate, the plurality of barrier ribs configured to partition a plurality of discharge cells, wherein a width of the address electrode measured in a direction parallel to the address electrodes in an edge region of the plasma display panel is greater than a width of the address electrode measured in the direction parallel to the address electrodes in a middle region of the plasma display panel, wherein a width of the address electrode measured in a direction crossing the address electrodes in the edge region of the plasma display panel is greater than a width of the address electrode measured in the direction crossing the address electrodes in the middle region of the plasma display panel.
In yet another aspect, there is a multi plasma display panel comprising a first plasma display panel, a second plasma display panel positioned adjacent to the first plasma display panel, a third plasma display panel positioned adjacent to the first plasma display panel, and a fourth plasma display panel positioned adjacent to the second and third plasma display panels, wherein each of the first, second, third, and fourth plasma display panels includes a front substrate on which a plurality of front electrodes are disposed, a back substrate on which a plurality of address electrodes are disposed to cross the plurality of front electrodes, and a plurality of barrier ribs positioned between the front substrate and the back substrate, the plurality of barrier ribs configured to partition a plurality of discharge cells, wherein a first address electrode of the plurality of address electrodes of the first plasma display panel includes a first portion and a second portion that has a width greater than a width of the first portion and is closer to the third plasma display panel than the first portion, wherein a second address electrode of the plurality of address electrodes of the first plasma display panel is disposed closer to the second plasma display panel than the first address electrode, wherein a minimum width of the second address electrode is greater than the width of the first portion of the first address electrode.
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:
Reference will now be made in detail embodiments of the invention examples of which are illustrated in the accompanying drawings.
According to various embodiments of the invention, any one or more features from one embodiment/example/variation of the invention can be applied to (e.g., added, substituted, modified, etc.) any one or more other embodiments/examples/variations discussed below according to the invention. Further any operations/methods discussed below can be implemented in any of these devices/units or other suitable devices/units.
A plasma display panel may display an image in a frame including a plurality of subfields.
More specifically, as shown in
In
An upper dielectric layer 204 may be formed on the scan electrode 202 and the sustain electrode 203 to limit a discharge current of the scan electrode 202 and the sustain electrode 203 and to provide insulation between the scan electrode 202 and the sustain electrode 203.
A protective layer 205 may be formed on the upper dielectric layer 204 to facilitate discharge conditions. The protective layer 205 may be formed of a material having a high secondary electron emission coefficient, for example, magnesium oxide (MgO).
A lower dielectric layer 215 may be formed on the address electrode 213 to provide insulation between the address electrodes 213.
Barrier ribs 212 of a stripe type, a well type, a delta type, a honeycomb type, etc. may be formed on the lower dielectric layer 215 to provide discharge spaces (i.e., discharge cells). Hence, a first discharge cell emitting red light, a second discharge cell emitting blue light, and a third discharge cell emitting green light, etc. may be formed between the front substrate 201 and the back substrate 211. Each of the barrier ribs 212 may include first and second barrier ribs each having a different height.
The address electrode 213 may cross the scan electrode 202 and the sustain electrode 203 in one discharge cell. Namely, each discharge cell is formed at a crossing of the scan electrode 202, the sustain electrode 203, and the address electrode 213.
Each of the discharge cells provided by the barrier ribs 212 may be filled with a predetermined discharge gas.
A phosphor layer 214 may be formed inside the discharge cells to emit visible light for an image display during an address discharge. For example, first, second, and third phosphor layers that respectively generate red, blue, and green light may be formed inside the discharge cells.
When a predetermined signal is supplied to at least one of the scan electrode 202, the sustain electrode 203, and the address electrode 213, a discharge may occur inside the discharge cell. The discharge may allow the discharge gas filled in the discharge cell to generate ultraviolet rays. The ultraviolet rays may be incident on phosphor particles of the phosphor layer 214, and then the phosphor particles may emit visible light. Hence, an image may be displayed on the screen of the plasma display panel 100.
A frame for achieving a gray scale of an image displayed on the plasma display panel is described with reference to
As shown in
For example, if an image with 256-gray level is to be displayed, as shown in
Furthermore, at least one of a plurality of subfields of a frame may further include a reset period for initialization. At least one of a plurality of subfields of a frame may not include a sustain period.
The number of sustain signals supplied during the sustain period may determine a gray level of each of the subfields. For example, in such a method of setting a gray level of a first subfield at 20 and a gray level of a second subfield at 21, the sustain period increases in a ratio of 2n (where, n=0, 1, 2, 3, 4, 5, 6, 7) in each of the subfields. Hence, various gray levels of an image may be achieved by controlling the number of sustain signals supplied during the sustain period of each subfield depending on a gray level of each subfield.
Although
At least one of a plurality of subfields of a frame may be a selective erase subfield, or at least one of the plurality of subfields of the frame may be a selective write subfield.
If a frame includes at least one selective erase subfield and at least one selective write subfield, it may be preferable that a first subfield or first and second subfields of a plurality of subfields of the frame is/are a selective write subfield and the other subfields are selective erase subfields.
In the selective erase subfield, a discharge cell to which a data signal is supplied during an address period is turned off during a sustain period following the address period. In other words, the selective erase subfield may include an address period, during which a discharge cell to be turned off is selected, and a sustain period during which a sustain discharge occurs in the discharge cell that is not selected during the address period.
In the selective write subfield, a discharge cell to which a data signal is supplied during an address period is turned on during a sustain period following the address period. In other words, the selective write subfield may include a reset period during which discharge cells are initialized, an address period during which a discharge cell to be turned on is selected, and a sustain period during which a sustain discharge occurs in the discharge cell selected during the address period.
A driving waveform for driving the plasma display panel is illustrated in
As shown in
More specifically, the ramp-up signal RU may be supplied to the scan electrode Y during a setup period of the reset period RP, and the ramp-down signal RD may be supplied to the scan electrode Y during a set-down period following the setup period SU. The ramp-up signal RU may generate a weak dark discharge (i.e., a setup discharge) inside the discharge cells. Hence, the wall charges may be uniformly distributed inside the discharge cells. The ramp-down signal RD subsequent to the ramp-up signal RU may generate a weak erase discharge (i.e., a set-down discharge) inside the discharge cells. Hence, the remaining wall charges may be uniformly distributed inside the discharge cells to the extent that an address discharge occurs stably.
During an address period AP following the reset period RP, a scan reference signal Ybias having a voltage greater than a minimum voltage of the ramp-down signal RD may be supplied to the scan electrode Y. In addition, a scan signal Sc falling from a voltage of the scan reference signal Ybias may be supplied to the scan electrode Y.
A pulse width of a scan signal supplied to the scan electrode during an address period of at least one subfield of a frame may be different from pulse widths of scan signals supplied during address periods of the other subfields of the frame. A pulse width of a scan signal in a subfield may be greater than a pulse width of a scan signal in a next subfield. For example, a pulse width of the scan signal may be gradually reduced in the order of 2.6 μs, 2.3 μs, 2.1 μs, 1.9 μs, etc. or may be reduced in the order of 2.6 μs, 2.3 μs, 2.1 μs, . . . , 1.9 μs, 1.9 μs, etc. in the successively arranged subfields.
As above, when the scan signal Sc is supplied to the scan electrode Y, a data signal Dt corresponding to the scan signal Sc may be supplied to the address electrode X. As a voltage difference between the scan signal Sc and the data signal Dt is added to a wall voltage obtained by the wall charges produced during the reset period RP, an address discharge may occur inside the discharge cell to which the data signal Dt is supplied. In addition, during the address period AP, a sustain reference signal Zbias may be supplied to the sustain electrode Z, so that the address discharge efficiently occurs between the scan electrode Y and the address electrode X.
During a sustain period SP following the address period AP, a sustain signal SUS may be supplied to at least one of the scan electrode Y or the sustain electrode Z. For example, the sustain signal SUS may be alternately supplied to the scan electrode Y and the sustain electrode Z. Further, the address electrode X may be electrically floated during the sustain period SP. As the wall voltage inside the discharge cell selected by performing the address discharge is added to a sustain voltage Vs of the sustain signal SUS, every time the sustain signal SUS is supplied, a sustain discharge, i.e., a display discharge may occur between the scan electrode Y and the sustain electrode Z.
In the embodiment of the invention, the size of the discharge cell in a middle region of the plasma display panel may be less than the size of the discharge cell in an edge region of the plasma display panel.
In other words, the size of the discharge cell in a first region of the plasma display panel may be less than the size of the discharge cell in a second region outside the first region. In the embodiment of the invention, the size of the discharge cell may indicate the of the discharge cell partitioned by the barrier ribs 212.
For example, as shown in
As shown in
Alternatively, as shown in
A reason why the size of the second discharge cell 230 positioned in the edge region of the plasma display panel is greater than the size of the first discharge cell 240 positioned in the middle region of the plasma display panel is described below.
A method for manufacturing the plasma display panel may include a process for exhausting an impurity gas and a process for injecting the discharge gas. More specifically, after the front substrate 201 is attached to the back substrate 211, an impurity gas remaining in a space between the front substrate 201 and the back substrate 211 may be exhausted to the outside of the plasma display panel using an exhaust device such as a vacuum pump. Then, a discharge gas may be injected into the space between the front substrate 201 and the back substrate 211.
In the exhaust process, an exhaust amount of the impurity gas may vary depending on a connection location of the exhaust device, i.e., a location of an exhaust hole. For example, a remaining possibility of the impurity gas in the edge region of the panel is greater than a remaining possibility of the impurity gas in the middle region of the panel because of the structural characteristics of the panel. In particular, a remaining possibility of the impurity gas in the corner of the panel is greater than the remaining possibility of the impurity gas in the edge region of the panel.
Further, the injection uniformity of the discharge gas injected in the injection process may vary depending on a location of the panel. More specifically, because the discharge gas is easily circulated in the middle region of the panel, the injection uniformity of the discharge gas may be relatively good. On the other hand, the injection uniformity of the discharge gas in the edge region of the panel may be less than the injection uniformity of the discharge gas in the middle region of the panel because of the structural characteristics of the edge region of the panel. As a result, the discharge cells positioned in the edge region of the panel may perform an unstable discharge operation and also may be turned off.
Accordingly, the plasma display panel according to the embodiment of the invention may be configured, so that the size of the discharge cell 230 positioned in the edge region of the panel is greater than the size of the discharge cell 240 positioned in the middle region of the panel, thereby stabilizing a discharge operation of the discharge cell 230 positioned in the edge region. A width of the barrier rib 212 may be adjusted, so that the size of the discharge cell 230 positioned in the edge region is greater than the size of the discharge cell 240 positioned in the middle region.
As shown in
Because the size of the second discharge cell 230 increases by reducing the width of the second barrier rib 212b as shown in
Alternatively, as shown in
As shown in
As shown in
For example, a width L2 of the discharge cell measured in a direction parallel to the second barrier rib 212b in the second region A2 may be greater than a width L1 of the discharge cell measured in the direction parallel to the second barrier rib 212b in the first region A1 by setting a width T4 of the first barrier rib 212a in the second region A2 to be less than a width T3 of the first barrier rib 212a in the first region A1.
As above, because the size of the discharge cell in the second region A2 increases by reducing the width of the first barrier rib 212a in the second region A2, the distance P1 between the middle points of the two adjacent discharge cells in the direction parallel to the second barrier rib 212b may be uniform.
Alternatively, as shown in
For example, the size of the second discharge cell 230 in the second region A2 may gradually increase by gradually reducing the width of the second barrier rib 212b in the second region A2.
In other words, the width W2 of the discharge cell measured in the direction parallel to the first electrode in the 2-1 region A2-1 positioned in the direction parallel to the second electrode (i.e., in the direction parallel to the second barrier rib 212b) may be greater than the width W1 of the discharge cell measured in the direction parallel to the first electrode in the first region A1. Further, the width W3 of the discharge cell measured in the direction parallel to the first electrode in the 2-2 region A2-2 outside the 2-1 region A2-1 in the direction parallel to the second barrier rib 212b may be greater than the width W2 of the discharge cell measured in the direction parallel to the first electrode in the 2-1 region A2-1. Namely, the size of the discharge cell may gradually increase as the discharge cell goes from the middle to the edge of the plasma display panel in the direction parallel to the second barrier rib 212b.
Further, as shown in
In the embodiment of the invention, the vertical direction of the panel may be a direction parallel to a short side SS of the back substrate 211, and the horizontal direction of the panel may be a direction parallel to a long side LS of the back substrate 211.
The size of the discharge cell in the edge region may be greater than the size of the discharge cell in the middle region in the direction of the long side LS of the back substrate 211. Further, the size of the discharge cell in the edge region may be greater than the size of the discharge cell in the middle region in the direction of the short side SS of the back substrate 211. In other words, as shown in
As shown in
A 1-1 driver 101 and a 1-2 driver 102 may supple driving signals to the first plasma display panel 100 of the plurality of plasma display panels 100, 110, 120, and 130. The 1-1 display panel 100 of the plurality of plasma display panels 100, 110, 120, and 130. The 1-1 driver 101 and the 1-2 driver 102 may be integrated into one driver. Further, a 2-1 driver 111 and a 2-2 driver 112 may supply driving signals to the second plasma display panel 110. In other words, the multi plasma display panel 10 may be configured so that the plasma display panels 100, 110, 120, and 130 receive the driving signal from different drivers, respectively.
For example, as shown in
The first to fourth main frames 2700, 2710, 2720, and 2730 may respectively include driving boards for supplying the driving signals to the first to fourth panels 100, 110, 120, and 130.
As shown in
A method for manufacturing the multi plasma display panel 10 is described below.
As shown in
Next, as shown in
Next, as shown in
Next, as shown in
As shown in
An outermost discharge cell of the first panel {circle around (1)} may be positioned in the second region of the first panel {circle around (1)}, and an outermost discharge cell of the second panel {circle around (2)} may be positioned in the fourth region of the second panel {circle around (2)}. Further, at least one discharge cell adjacent to the outermost discharge cell of the first panel {circle around (1)} may be further positioned in the second region of the first panel {circle around (1)}, and at least one discharge cell adjacent to the outermost discharge cell of the second panel {circle around (2)} may be further positioned in the fourth region of the second panel {circle around (2)}.
The seam portion between the two adjacent panels {circle around (1)} and {circle around (2)} of the multi plasma display panel may reduce the image quality of the multi plasma display panel. Hence, the size of the edge region of the outermost discharge cell in the boundary region BA between the two adjacent panels {circle around (1)} and {circle around (2)} may decrease so as to reduce a width of the seam portion. However, when the size of the edge region of the outermost discharge cell in the boundary region BA decreases, the impurity gas may remain in the boundary region BA. Hence, the discharge cells positioned in the boundary region BA may perform the unstable discharge operation and may be turned off. As a result, the images may be discontinuously displayed on the two adjacent panels {circle around (1)} and {circle around (2)}, and the image quality of the multi plasma display panel may worsen.
On the other hand, as shown in
Accordingly, the plasma display panel illustrated in
As shown in
Alternatively, the sizes of second discharge cells 230A and 230B positioned in a boundary region between two panels of the multi plasma display panel 10, that are positioned adjacent to each other in both the vertical and horizontal directions, may be greater than sizes of first discharge cells 240A and 240B positioned in middle regions of the two panels.
For example, as shown in
As shown in
The width of the second discharge cell 230 measured in the direction parallel to the first electrode in the second region may be greater than the width of the first discharge cell 240 measured in the direction parallel to the first electrode in the first region. This may be the structure to which the structure illustrated in
Further, the width of the second discharge cell 230 measured in the direction parallel to the second electrode in the third region may be greater than the width of the first discharge cell 240 measured in the direction parallel to the second electrode in the first region. This may be the structure to which the structure illustrated in
The width of the second discharge cell 230 measured in the direction parallel to the first electrode in the third region may be greater than the width of the first discharge cell 240 measured in the direction parallel to the first electrode in the first region. This may be the structure to which the structure illustrated in
The above-described configurations applied to the first panel {circle around (1)} may be applied to the second, third, and fourth panels {circle around (2)}, {circle around (3)}, and {circle around (4)}.
The plurality of plasma display panels may be disposed adjacent to one another to manufacture the multi plasma display panel. For example, as shown in
The first to fourth panels 100, 110, 120, and 130 may be disposed, so that cutting surfaces of the first to fourth panels 100, 110, 120, and 130 are adjacent to one another.
For example, a cutting process and a grinding process may be performed on a second short side SS2 and a second long side LS2 of each of the first to fourth panels 100, 110, 120, and 130.
More specifically, the first and second panels 100 and 110 may be disposed so that the second short side SS2 of the first panel 100 is adjacent to the second short side SS2 of the second panel 110. The third and fourth panels 120 and 130 may be disposed so that the second short side SS2 of the third panel 120 is adjacent to the second short side SS2 of the fourth panel 130. Further, the first and third panels 100 and 120 may be disposed so that the second long side LS2 of the first panel 100 is adjacent to the second long side LS2 of the third panel 120. The second and fourth panels 110 and 130 may be disposed so that the second long side LS2 of the second panel 110 is adjacent to the second long side LS2 of the fourth panel 130.
Unlike the embodiment of the invention, a viewer may view a discontinuous image displayed on a general multi plasma display panel because of a seam portion of the general multi plasma display panel.
On the other hand, in the embodiment of the invention, as shown in
Although the embodiment of the invention illustrates the first to fourth panels 100, 110, 120, and 130 having the matrix structure of 2×2, other arrangement structures may be used. For example, the plurality of plasma display panels may be arranged in a matrix structure of 1×2 or 2×1.
Alternatively, as shown in
In plasma display panels 1000-1330 having the matrix structure of 4×4 shown in
As shown in
The cutting process and the grinding process may be performed on first and second short sides SS1 and SS2 and first and second long sides LS1 and LS2 of each of the first panel 1000, the second panel 1010, the fifth panel 1100, and the sixth panel 1110.
The first and second panels 1000 and 1010 may be disposed so that the second short side SS2 of the first panel 1000 and the first short side SS1 of the second panel 1010 are adjacent to each other. The fifth and sixth panels 1100 and 1110 may be disposed so that the second short side SS2 of the fifth panel 1100 and the first short side SS1 of the sixth panel 1110 are adjacent to each other. The first and fifth panels 1000 and 1100 may be disposed so that the second long side LS2 of the first panel 1000 and the first long side LS1 of the fifth panel 1100 are adjacent to each other. The second and sixth panels 1010 and 1110 may be disposed so that the second long side LS2 of the second panel 1010 and the first long side LS1 of the sixth panel 1110 are adjacent to each other.
In the embodiment of the invention, a width or a thickness of the address electrode in the middle region of the panel may be less than a width or a thickness of the address electrode in the edge region of the panel. In other words, a width of the address electrode 213 in the first region of the panel may be less than a width of the address electrode 213 in the second region of the panel outside the first region.
As shown in
Preferably, as shown in
As shown in
Alternatively, as shown in
A reason why the width of the address electrode positioned in the edge region of the panel may be greater than a width of the address electrode positioned in the middle region of the panel is described below.
A method for manufacturing the plasma display panel may include a process for exhausting an impurity gas and a process for injecting the discharge gas. More specifically, after the front substrate 201 is attached to the back substrate 211, an impurity gas remaining in a space between the front substrate 201 and the back substrate 211 may be exhausted to the outside of the plasma display panel using an exhaust device such as a vacuum pump. Then, a discharge gas may be injected into the space between the front substrate 201 and the back substrate 211.
In the exhaust process, an exhaust amount of the impurity gas may vary depending on a connection location of the exhaust device, i.e., a location of an exhaust hole. For example, a remaining possibility of the impurity gas in the edge region of the panel is greater than a remaining possibility of the impurity gas in the middle region of the panel because of the structural characteristics of the panel. In particular, a remaining possibility of the impurity gas in the corner of the panel is greater than the remaining possibility of the impurity gas in the edge region of the panel.
Further, the injection uniformity of the discharge gas injected in the injection process may vary depending on a location of the panel. More specifically, because the discharge gas is easily circulated in the middle region of the panel, the injection uniformity of the discharge gas may be relatively good. On the other hand, the injection uniformity of the discharge gas in the edge region of the panel may be less than the injection uniformity of the discharge gas in the middle region of the panel because of the structural characteristics of the edge region of the panel. As a result, the discharge cells positioned in the edge region of the panel may perform an unstable discharge operation and also may be turned off.
Accordingly, the plasma display panel according to the embodiment of the invention may be configured, so that the width of the address electrode positioned in the edge region of the panel is greater than the width of the address electrode positioned in the middle region of the panel, thereby stabilizing the discharge operation of the discharge cell positioned in the edge region.
The address electrode positioned in the edge region of the panel may have a predetermined pattern, so that the width of the address electrode positioned in the edge region of the panel is greater than the width of the address electrode positioned in the middle region of the panel. For example, as shown in
Alternatively, as shown in
As above, even when the thickness or the width of the address electrode 213 is adjusted depending on the location of the panel, the same effect may be obtained. As shown in
As shown in
As above, the discharge operation of the discharge cells positioned in the edge region of the panel may be stabilized by adjusting the width of the address electrode 213 in the vertical direction of the panel.
Further, the second portion P2 may have a predetermined pattern, so that the width of the second portion P2 of the address electrode 213 positioned in the edge region of the panel in the vertical direction of the panel is greater than the width of the first portion P1 of the address electrode 213. For example, as shown in
In other words, the address electrode 213 may have the predetermined pattern in the edge region of the panel and may have a stripe pattern in the middle region of the panel in the vertical direction of the panel.
Alternatively, as shown in
Alternatively, as shown in
More specifically, as shown in
In this instance, the first address electrode 213a may include a first portion P1 and a second portion P2 positioned outside the first portion P1. A width W21 of the second portion P2 may be greater than a width W11 of the first portion P1.
Further, the width W2-1 of the second address electrode 213b may be greater than the width W11 of the first portion P1 of the first address electrode 213a and may be substantially equal to the width W21 of the second portion P2 of the first address electrode 213a. Hence, the discharge operation of the discharge cells positioned in the edge region of the panel in the vertical direction and the horizontal direction of the panel may be stabilized.
Alternatively, as shown in
As shown in
An outermost discharge cell of the first panel {circle around (1)} may be positioned in the second region of the first panel {circle around (1)}, and an outermost discharge cell of the second panel {circle around (2)} may be positioned in the fourth region of the second panel {circle around (2)}.
A seam portion between the two adjacent panels {circle around (1)} and {circle around (2)} of the multi plasma display panel may reduce the image quality of the multi plasma display panel. Hence, the size of an edge region of the outermost discharge cell in the boundary region BA between the two adjacent panels {circle around (1)} and {circle around (2)} may decrease so as to reduce a width of the seam portion. However, when the size of the edge region of the outermost discharge cell in the boundary region BA decrease, an impurity gas may remain in the boundary region BA. Hence, the discharge cells positioned in the boundary region BA may perform the unstable discharge operation and may be turned off. As a result, the images may be discontinuously displayed on the two adjacent panels {circle around (1)} and {circle around (2)}, and the image quality of the multi plasma display panel may worsen.
On the other hand, as shown in
Accordingly, the plasma display panel illustrated in
As shown in
Alternatively, the widths of the address electrodes positioned in a boundary region between two panels of the multi plasma display panel, that are positioned adjacent to each other in both the vertical and horizontal directions, may be greater than the widths of the address electrodes positioned in middle regions of the two panels.
For example, as shown in
As shown in
Further, a second address electrode 213b of the plurality of address electrodes of the first panel {circle around (1)} is positioned closer to the second panel {circle around (2)} than the first address electrode 213a. A minimum width of the second address electrode 213b may be greater than a width of the first portion P1 of the first address electrode 213a. The second address electrode 213b may be disposed in an area overlapping an outermost discharge cell facing the second panel {circle around (2)} among a plurality of discharge cells of the first panel {circle around (1)}. Further, the second portion P2 of the first address electrode 213a may be disposed in an area overlapping an outermost discharge cell facing the third panel {circle around (3)} among the plurality of discharge cells of the first panel {circle around (1)}.
The above-described configurations applied to the first panel {circle around (1)} may be applied to the second, third, and fourth panels {circle around (2)}, {circle around (3)}, and {circle around (4)}. Further, although it is not shown, a thickness of the address electrode may be adjusted instead of the adjustment of the width of the address electrode illustrated in
For example, the multi plasma display panel may include a first panel and a second panel that are positioned adjacent to each other. A thickness of the address electrode in a first region of the first panel may be less than a thickness of the address electrode in a second region of the first panel that is closer to the second panel than the first region. A thickness of the address electrode in a third region of the second panel may be less than a thickness of the address electrode in a fourth region of the second panel that is closer to the first panel than the third region.
Although the technical configuration for adjusting the width of the address electrode and the technical configuration for adjusting the size of the discharge cell have been separately described, the two technical configurations may be combined with each other. For example, while the size of the discharge cell positioned in the edge region of the panel is greater than the size of the discharge cell positioned in the middle region of the panel, the width or the thickness of the address electrode positioned in the edge region of the panel may be greater than the width or the thickness of the address electrode positioned in the middle region of the panel.
More specifically, as shown in
Further, a width W1-1 of the address electrode 213 corresponding to the discharge cell positioned in the middle region of the panel may be less than a width W2-1 of the address electrode 213 corresponding to the discharge cell positioned in the edge region of the panel. In other words, the width W1-1 of the address electrode 213 corresponding to the discharge cell positioned in the middle region of the panel may be less than the width W2-1 of the address electrode 213 corresponding to the discharge cell positioned in the edge region of the panel in the direction crossing the address electrode 213.
Alternatively, the widths of the plurality of second address electrodes positioned in the edge region of the panel may be greater than the widths of the plurality of first address electrodes positioned in the middle region of the panel. This was described above with reference to
As shown in
As shown in
Further, the size of the discharge cell 230 positioned in a boundary region BA2 between the first and third panels {circle around (1)} and {circle around (3)} may be greater than the size of the discharge cell 240 positioned in the middle region of each of the first and third panels {circle around (1)} and {circle around (3)}. Further, the width of the address electrode 213b positioned in the boundary region BA2 between the first and third panels {circle around (1)} and {circle around (3)} may be greater than the width of the address electrode 213a positioned in the middle region of each of the first and third panels {circle around (1)} and {circle around (3)}. Namely, the width of the address electrode 213a positioned in the boundary region BA2 between the first and third panels {circle around (1)} and {circle around (3)} may increase. The above configuration may be applied to a boundary region BA2 between the second and fourth panels {circle around (2)} and {circle around (4)}.
Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2010-0002312 | Jan 2010 | KR | national |
| 10-2010-0003902 | Jan 2010 | KR | national |
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