KR100786866B1 - Plasma display panel - Google Patents

Abstract

The plasma display panel according to the present invention enables high integration of pixels and prevents cross talk between adjacent discharge cells in this state, and is disposed to face each other, and is divided into a plurality of spaces therebetween. A front substrate and a rear substrate having discharge cells formed therein, address electrodes extending in a first direction between the front substrate and the rear substrate, and electrically connected with the address electrodes between the front substrate and the rear substrate; It is separated, and alternately disposed along the first direction, and include sustain electrodes and scan electrodes formed along a second direction having a predetermined line width and intersecting the first direction. The one address electrode corresponds to at least two discharge cells of a plurality of discharge cells constituting one pixel, and two scan electrodes correspond to the one pixel. Each of the sustain electrode and the scan electrode may include a discharge part extending in the second direction in the vicinity of the center of the discharge cell and correspondingly disposed to form a discharge gap, and end portions of the discharge parts neighboring in the second direction. And connecting portions connected to each other to intersect in two directions.

Plasma, address electrode, scan electrode, sustain electrode, discharge cell

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

1 is an exploded perspective view showing a plasma display panel according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1.

3 is a plan view illustrating a pixel and an electrode array of the plasma display panel according to the first embodiment of the present invention.

4 is a plan view illustrating a pixel and an electrode array of the plasma display panel according to the second embodiment of the present invention.

5 is a plan view illustrating a pixel and an electrode array of a plasma display panel according to the related art.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel which densifies pixels and prevents cross talk between adjacent discharge cells.

In general, a plasma display panel is a display device that realizes an image by using red (R), green (G), or blue (B) visible light generated by vacuum ultraviolet rays emitted from a plasma obtained through gas discharge by exciting a phosphor. .

The plasma display panel can realize a 60-inch or larger screen with a thickness of only 10 cm or less, and is a self-luminous display device such as a CRT.

In addition, the plasma display panel has been spotlighted as a TV and an industrial flat panel display, which has advantages in terms of productivity and cost since its manufacturing method is simpler than LCD.

The plasma display panel is, for example, a three-electrode surface discharge plasma display panel. Taking the three-electrode surface discharge type as an example, the plasma display panel includes a substrate including sustain electrodes and scan electrodes located on the same surface, and another substrate including address electrodes extending in a vertical direction and spaced apart therefrom. It is filled with the discharge gas in the meantime.

In this plasma display panel, discharge is determined by the discharge of the scan electrode and the address electrode independently connected to each line, and the sustain discharge for displaying the screen is performed by the sustain electrode and the scan electrode on the same plane.

Although there are various difficulties in developing an FHD plasma display panel, one of them is that the efficiency decreases as the pitch of the discharge cells decreases. The other is that the number of address electrodes increases as the number of discharge cells increases.

In particular, in the development of a 42-inch FHD (1920 * 1080) class plasma display panel, when the stripe partition structure and the structure in which the scan electrode and the sustain electrode are arranged in the direction intersecting the same are implemented, the implementation of the plasma display panel There is considerable difficulty. This can be confirmed by explaining with reference to FIG.

5 is a plan view illustrating a pixel and an electrode array of a plasma display panel according to the related art.

As shown in Fig. 5, in the plasma display panel having the stripe-type partition wall structure, the discharge cells are formed with the discharge gaps facing each other and the sustain electrodes Xn, ..., Xn + 3 and the scanning electrodes Yn,. .., is formed between Yn + 3).

One pixel 61 includes red, green, and blue discharge cells 61R, 61G, and 61B adjacent to each other, that is, three subpixels. In this case, the address electrodes 65 are formed to pass through each of the discharge cells 61R, 61G, and 61B constituting one pixel 61.

Therefore, as shown, when considering 16 pixels 61, all 12 address electrodes 65 (Am, Am + 1, ..., Am + 11), three for each pixel 61, It is necessary.

However, as the plasma display panel gradually develops into a higher resolution, when the discharge cells 61R, 61G, and 61B are highly integrated, the address electrodes 65 passing through the discharge cells 61R, 61G, and 61B are closer to each other. You lose.

As a result, the capacitance (C) value between neighboring address electrodes 65 increases, which inevitably increases energy (= CV ² f) consumption.

It is an object of the present invention to provide a plasma display panel which enables high integration of pixels and prevents cross talk between adjacent discharge cells in this state.

Plasma display panel according to an embodiment of the present invention, disposed opposite to each other, the front substrate and the rear substrate having a plurality of discharge cells partitioned in the space therebetween, the first direction between the front substrate and the rear substrate Address electrodes extending along the first electrode, and electrically separated from the address electrodes between the front substrate and the rear substrate, alternately disposed along the first direction, and alternately intersecting the first direction with a predetermined line width. Sustain electrodes and scan electrodes formed in a second direction. The one address electrode corresponds to at least two discharge cells of a plurality of discharge cells constituting one pixel, and two scan electrodes correspond to the one pixel. Each of the sustain electrode and the scan electrode may include a discharge part extending in the second direction in the vicinity of the center of the discharge cell and correspondingly disposed to form a discharge gap, and end portions of the discharge parts neighboring in the second direction. And connecting portions connected to each other to intersect in two directions.

The sustain electrode and the scan electrode may be formed of a metal electrode. The discharge parts may be disposed in parallel to each other.

The discharge cells are partitioned by partition walls provided between the front substrate and the rear substrate. The partition wall may include first partition wall members formed along the first direction and second partition wall members connecting neighboring first partition wall members to each other in the second direction. The second partition members neighboring to the second direction may be disposed at positions shifted by a predetermined distance in the first direction.

The predetermined distance in the first direction may be 1/2 of the length in the first direction of the discharge cell. The first partition members may be formed in a straight line. In addition, the first partition members may be zigzag.

The second partition member may be formed in a straight line in one discharge cell.

The second partition member may have a line width greater than the line width of the first partition member.

Two address electrodes and two scan electrodes are disposed in the one pixel, the one address electrode corresponds to two discharge cells neighboring in the first direction, and the other address electrode is the remaining one. Corresponding to two discharge cells, the one scan electrode corresponds to two discharge cells neighboring in the second direction, and the other scan electrode corresponds to the other one discharge cell.

Also, two discharge cells corresponding to the same address electrode may have phosphor layers of different colors.

Each pixel may include three discharge cells, and the centers of the discharge cells may be arranged in a triangular shape.

Each of the discharge cells may have a rectangular planar shape or a hexagonal planar shape.

An extension line of a boundary of the pair of discharge cells neighboring in the first direction may pass through the center of the discharge cells neighboring in the second direction.

Two of the discharge cells constituting the one pixel may be adjacent to be parallel to each other in the first direction.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

1 is an exploded perspective view showing a plasma display panel according to a first embodiment of the present invention.

Referring to this drawing, in the plasma display panel according to the first embodiment, three subpixels for generating visible light of red, green, and blue are arranged in a triangle to form a set of pixels.

In more detail, the plasma display panel includes a rear substrate 10 and a front substrate 30 which are disposed substantially parallel to each other at predetermined intervals and enclosed therebetween.

As shown in FIG. 2, partition walls 23 partitioning the pixels 120 having a predetermined height and pattern are disposed between the rear substrate 10 and the front substrate 30. Here, the set of pixels 120 includes three subpixels 120R, 120G, and 120B arranged in a triangle as described above.

At this time, the subpixels 120R, 120G, and 120B have respective discharge cells 18, and the discharge cells 18 are partitioned by the partition wall 23. In the first embodiment, the planar shape of each of the subpixels 120R, 120G, and 120B is approximately rectangular, so that the partition wall 23 has a rectangular planar shape. Therefore, the discharge cells 18 of each of the subpixels 120R, 120G, and 120B have a rectangular box shape with an open upper portion.

As shown in Fig. 3, the partition wall 23 forming the discharge cell 18 includes a first partition member 23a which is formed in a straight line along the y-axis direction and a neighboring agent formed along the x-axis direction. It consists of a 2nd partition member 23b formed in a straight line so that 1st partition member 23a may connect with each other.

The first partition member 23a is formed in a straight line along the y-axis direction, and the address electrodes 15 correspond to the adjacent first partition members 23a, respectively. The second partition members 23b are disposed at positions shifted by a predetermined distance L along the y-axis direction between the first partition members 23a adjacent to each other in the x-axis direction. The distance L in the y-axis direction shifted at this time is a distance corresponding to 1/2 of the length of the y-axis direction of the discharge cell 18.

Further, the partition wall 23 may be formed to have the same line width, but in the first embodiment, the line width W2 of the second partition members 23b is larger than the line width W1 of the first partition members 23a. The partition 23 formed large is illustrated. As described above, the second partition members 23b having the wide line width W2 prevent the cross talk in the y-axis direction during the plasma discharge in the discharge cell 18.

The discharge cells 18 are filled with a discharge gas including xenon (Xe), neon (Ne), and the like necessary for plasma discharge. Sub-pixels 120R, 120G, and 120B, which generate visible light of red (R), green (G), and blue (B), respectively, are formed with phosphor layers 25 corresponding to red, green, and blue, respectively. have. The phosphor layers 25 are formed of respective phosphors applied to the bottom surface of each discharge cell 18 and the side surface of the partition wall 23.

In order to drive the discharge cells 18 to realize an image, each of the discharge cells 28 corresponds to the above-described address electrode 15, and the sustain electrode 32 and the scan electrode 34 intersecting with each other. It is provided.

The address electrodes 15 are formed on the rear substrate 10 and extend in a first direction (y-axis direction of the drawing), and are arranged side by side in a second direction (x-axis direction of the drawing). The address electrodes 15 are disposed to pass through the lower portion (ie, between the rear substrate and the partition wall) of each discharge cell 18.

In addition, the dielectric layer 12 is formed of a dielectric applied to the entire surface of the back substrate 10 while covering the address electrodes 15. Therefore, the address electrodes 15 are disposed under the barrier 23 and the dielectric layer 12.

In addition, the sustain electrodes 32 and the scan electrodes 34 are formed on the front substrate 30 along a second direction (x-axis direction in the drawing) with a predetermined line width. The sustain electrode 32 and the scan electrode 34 correspond to each other in each of the discharge cells 18 and form mutual discharge gaps near the center of the discharge cells 18. The sustain electrode 32 and the scan electrode 34 are alternately arranged along the y-axis direction.

Each of the sustain electrode 32 and the scan electrode 34 is formed of a metal electrode formed on the front substrate 30 along the x-axis direction, that is, a bus electrode. The metal sustain electrode 32 and the scan electrode 34 have a line width to ensure stable discharge when driving the plasma display panel, and to minimize shielding of visible light generated in the discharge cell 18, It is desirable to have the smallest possible line width within a range to ensure stable discharge.

Each of the sustain electrodes 32 and the scan electrodes 34 is disposed near the centers of the discharge cells 18, the discharge parts 32a and 34a and the partition walls 23 defining the discharge cells 18. It is formed including the connecting portions (32b, 34b).

The discharge portions 32a and 34a extend in a straight line from the center of the discharge cell 18 along the x-axis direction, and form portions of the discharge gaps in parallel with each other, thereby substantially generating plasma discharge. That is, the discharge gap is formed by a pair of discharge parts 32a and 34a arranged in parallel with each other.

The connecting portions 32b and 34b connect the discharge parts 32a and 34a adjacent to each other in the x-axis direction. That is, the connecting portions 32b of the sustain electrodes 32 are connected to each other so that the ends of the discharge portions 32a of the sustain electrodes 32 adjacent to each other in the x-axis direction cross each other. As such, the connecting portions 34b of the scan electrodes 34 are connected to each other so that the ends of the discharge portions 34a of the scan electrodes 34 adjacent to each other in the x-axis direction cross each other. Of course, the connecting portions 32b and 42b also intersect in the y-axis direction.

Due to this connection structure, the sustain electrode 32 and the scan electrode 34 maintain a long distance LC1 from the outside with respect to one discharge cell 18 and approach the near distance LC2 near the center thereof. And a discharge gap is formed at this near distance LC2. Plasma discharge occurs at this near distance LC2 portion, and when viewed from one discharge cell 18, as the discharge generation portion is collected at the center of the discharge cell 18, crosstalk in the y-axis direction can be prevented. Will be.

In addition, a dielectric layer 38 is formed on the entire surface of the front substrate 30 while covering the sustain electrode 32 and the scanning electrode 34 on the front substrate 30, and a protective film using MgO as an example thereon ( 39 may be further formed.

Referring to FIG. 3, the arrangement of each pixel 120, the address electrode 15, the sustain electrode 32, and the scan electrode 34 corresponding to the first embodiment, two addresses are provided for each pixel 120. The electrodes 15 and the two scan electrodes 34 correspond to each other. Of course, each pixel 120 is composed of three sub-pixels 120R, 120G, and 120B that generate visible light of red, green, and blue, respectively.

Each center of the subpixels 120R, 120G, and 120B constituting the pixel 120 is arranged in a triangular shape. Three discharge cells 18 constituting one pixel 12, that is, two discharge cells 18 among the subpixels 120R, 120G, and 120B are adjacently arranged side by side in the y-axis direction.

In addition, at least two of the subpixels 120R, 120G, and 120B constituting one pixel 120 correspond to the same address electrode 15. Two scan electrodes 34 correspond to the one pixel 120. That is, whether or not the three subpixels 120R, 120G, and 120B constituting one pixel 120 is discharged by the two address electrodes 15 and the two scan electrodes 34.

In more detail, the corresponding subpixels 120G and 120B formed of two discharge cells 18 neighboring each other in the y-axis direction correspond to one address electrode 15 and the other one The subpixel 120R formed of the discharge cells 18 corresponds to the other address electrodes 15. The subpixels 120G and 120B of the two discharge cells 18 corresponding to one address electrode 15 have a phosphor layer 25 for generating visible light of different colors.

In addition, the subpixels 120R and 120B of two discharge cells 18 neighboring in the x-axis direction have one scan electrode 34 (Yn + 3) (hereinafter referred to as sustain electrodes and scan for convenience of understanding). The reference numerals of the electrodes are denoted together), and the subpixel 120G of the other discharge cell 18 corresponds to the other scan electrode 34 (Yn + 2). The two discharge cells 18 corresponding to one scan electrode 34 (Yn + 3) have a phosphor layer 25 for generating visible light of different colors.

One pixel 120 corresponding to the scan electrodes 34 (Yn + 3) (Yn + 2) also corresponds to the sustain electrodes 32 (Xn + 4) (Xn + 3). The sustain electrodes 32 (Xn + 4) (Xn + 3) and the scan electrodes 34 (Yn + 3) (Yn + 2) respectively face each other in one pixel 120.

The arrangement of the sustain electrode 32 and the scan electrode 34 corresponding to the pixel 120 may be set as described above or differently according to the selection of the pixels 120 repeatedly arranged.

In the first embodiment, each of the discharge cells 18 constituting each of the subpixels 120R, 120G, and 120B is arranged in a rectangular planar shape. Therefore, these radiation cells 18 form a boundary by sides in four directions. Therefore, the extension line of the boundary of the pair of adjacent discharge cells 18 along the y-axis direction passes through the center of the adjacent discharge cells 18 along the x-axis direction.

Although the centers of the three subpixels 120R, 120G, and 120B forming one pixel 120 are arranged in a triangular shape, they are formed by the discharge portions 32a and 34a and the connecting portions 32b and 34b. The electrode 32 and the scan electrode 34 are formed along the x-axis direction.

Thus, the sustain electrode 32 and the scan electrode 34 are disposed across the two different pixels among the subpixels 120R, 120G, and 120B in the x-axis direction on the plane. As a result, each of the sustain electrodes 32 and the scan electrodes 34 is disposed two to one pixel 120 including three subpixels 120R, 120G, and 120B. Scan electrodes 34 and sustain electrodes 32 are each disposed 3/2).

The scan electrode 34 (Yn + 3) applies the same voltage signal through two subpixels 120R and 120B neighboring each other in the x-axis direction from one pixel 120, and the other scan electrode 34 (Yn + 2) applies a voltage while passing through one subpixel 120G in the same pixel 120. In addition, the scan electrode 34 (Yn + 2) applies the same voltage signal while passing through the two subpixels 120G and 120B of the other pixels 120 adjacent to each other in the x-axis direction.

The sustain electrodes 34 face each of the scan electrodes 34. The sustain electrode 32 (Xn + 4) applies a voltage signal corresponding to one subpixel 120B in one pixel 120 while facing the scan electrode Yn + 3. In addition, the sustain electrode 32 (Xn + 4) applies the same voltage signal while passing through the two subpixels 120R and 120G of the other pixels 120 adjacent to each other in the x-axis direction. The other sustain electrode 32 (Xn + 3) applies the same voltage signal to the other two subpixels 120R and 120G in one pixel 120. The sustain electrode 32 (Xn + 3) faces the scan electrode 32 (Yn + 3) and the other scan electrode 32 (Yn + 2) on both sides of the y-axis direction.

Therefore, the sustain electrodes 32 and the scan electrodes 34 are alternately arranged along the y-axis direction, respectively, to control the driving of the pair of discharge cells 18.

4 is a plan view illustrating a pixel and an electrode array of the plasma display panel according to the second embodiment of the present invention.

As shown in Fig. 4, as a whole, the second embodiment is similar to or the same as the first embodiment, and thus different parts from the first embodiment will be described. The first embodiment has the discharge cell 18 having a rectangular planar shape, while the second embodiment has the discharge cell 218 having a hexagonal planar shape. For this reason, the partition 223 of 2nd Example forms the 1st partition member 223a formed in the y-axis direction in zigzag form.

When the discharge cell 218 is formed of a cube, the second embodiment arranges the centers of the subpixels 220R, 220G, and 220B in an equilateral triangle, thereby forming the centers of the subpixels 120R, 120G, and 120B. As compared with the first embodiment formed of an isosceles triangle, a more ideal pixel 2202 can be formed.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications or changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. In addition, it is natural that it belongs to the scope of the present invention.

As described above, according to the plasma display panel according to the present invention, two of the three subpixels constituting the pixel correspond to the same address electrode, and the pixel and the electrode are arranged to correspond to the two scan electrodes in one pixel. Since the number of address electrodes corresponding to each pixel is reduced, it is possible to realize high integration of pixels, and in this state, the discharge parts of the sustain electrode and the scan electrode are disposed at the center of the discharge cell, so that crosstalk between adjacent discharge cells is reduced. It is effective to prevent. In addition, according to the present invention, a cross between the discharge cells by forming a second partition member for partitioning the discharge cells adjacent in the y-axis direction to a line width wider than the line width of the first partition member for partitioning the adjacent discharge cells in the x-axis direction It is effective in preventing torque.

Claims (16)

A front substrate and a rear substrate disposed to face each other and having discharge cells divided into a plurality of spaces therebetween; Address electrodes formed in a first direction between the front substrate and the rear substrate; And Electrically separated from the address electrodes between the front substrate and the rear substrate, alternately arranged in the first direction, facing each other corresponding to the position of the discharge cell, and alternately intersecting the first direction. Sustain electrodes and scan electrodes that are alternately bent and formed along the second direction, One address electrode of the address electrodes corresponds to at least two discharge cells of a plurality of discharge cells constituting one pixel, Two scan electrodes correspond to the one pixel, Each of the sustain electrode and the scan electrode, A discharge unit extending in the second direction in the vicinity of the center of the discharge cell and correspondingly disposed to form a discharge gap; And a connection part connecting the ends of the discharge parts adjacent to each other in the second direction. According to claim 1, And the sustain electrode and the scan electrode are formed of a metal electrode. According to claim 1, And the discharge parts are disposed in parallel to each other. According to claim 1, The discharge cells are partitioned by partition walls provided between the front substrate and the rear substrate, The partition wall, First partition members formed along the first direction; Comprising second partition wall members for connecting the adjacent first partition wall members in the second direction, And the second partition wall members neighboring the second direction are disposed in a state shifted in the first direction. The method of claim 4, wherein And a distance shifted in the first direction is one half of a length of the discharge cell along the first direction. The method of claim 4, wherein And the first partition members are formed in a straight line. The method of claim 4, wherein And the first partition members are zigzag. The method of claim 4, wherein And the second partition member is formed in a straight line in one discharge cell. The method of claim 4, wherein The second partition member has a line width greater than the line width of the first partition member. According to claim 1, Two address electrodes and two scan electrodes are disposed in the one pixel, One address electrode of the two address electrodes corresponds to two discharge cells neighboring in the first direction, The other one of the two address electrodes corresponds to the other one discharge cell, One scan electrode of the two scan electrodes corresponds to two discharge cells neighboring in the second direction, And one of the two scan electrodes corresponds to the other one of the discharge cells. According to claim 1, Two discharge cells corresponding to the same address electrode has a phosphor layer of different colors. According to claim 1, The one pixel is composed of three discharge cells, The centers of the three discharge cells are arranged such that each center thereof is triangular. According to claim 1, And each of the discharge cells has a rectangular planar shape. According to claim 1, Each of the discharge cells has a hexagonal plane shape. According to claim 1, The extension line of the boundary of the pair of discharge cells neighboring in the first direction passes through the center of the discharge cells neighboring in the second direction. According to claim 1, Two of the discharge cells constituting the one pixel are adjacent to each other side by side in the first direction.

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