KR100614406B1 - Plasma display panel - Google Patents

Abstract

The plasma display panel of the present invention is formed on any one of two substrates spaced at regular intervals to form a space sealed with the surrounding sealing material, a partition wall installed to separate the space between the two substrates, and an opposite surface of the two substrates. In a plasma display panel including an address electrode formed on one of opposing surfaces of two substrates, a sustain electrode parallel to each other, a discharge gas filled in a space, and a phosphor, the partition walls may be arranged so that three hexagons in a plane form a triangle. When the discharge cells defined by the partition wall formed at the outline position of the area to be covered when forming a concave polygon when viewed from the front of the panel.

Therefore, the light emitting efficiency can be increased because the bulkhead area is increased to increase the amount of phosphor to be stacked thereon, and the space from the gap to the partition wall can be expanded to increase the light emitting efficiency due to discharge diffusion.

Description

Plasma Display Panel {Plasma display panel}

1 is a schematic plan view showing a conventional rectangular discharge cell in the form of a delta pixel arrangement;

FIG. 2 is a plan view schematically illustrating a state in which pixels are formed by partition walls in a part of a panel forming a screen according to an exemplary embodiment of the present invention;

3 is a plan view schematically showing a discharge cell of another embodiment of the present invention in which a dark material is applied to a portion of a substrate;

4 is a plan view illustrating a form in which a bus electrode and a transparent electrode are formed in one embodiment according to the present invention;

FIG. 5 is a plan view showing an embodiment in which an auxiliary bus electrode is formed in the configuration of FIG. 4; FIG.

6 is a schematic plan view showing an arrangement of discharge cells in another embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10,110: bulkhead 51,61,151,161: bus electrode

150,160,150 ', 160': sustain electrode 153,163: transparent electrode

155,165; Auxiliary bus electrode 120: dark matter

The present invention relates to a plasma display panel, and more particularly, to the shape and arrangement of partition walls and electrodes of the plasma display panel.

Plasma display panels are formed by forming electrodes on two opposing substrates, overlapping them at regular intervals, injecting a discharge gas therein, and sealing the plasma display panel (PDP). Refers to a flat panel display device. The plasma display device is formed by forming a plasma display panel and installing elements necessary for screen realization such as a driving circuit connected to each electrode of the panel.

Plasma displays can be formed thinner than Cathode ray tube (CRT) displays, which occupy a large volume, and thus are suitable for realizing a large screen with a relatively small volume. In addition, the plasma display device does not need to form an active element such as a transistor as compared to other flat panel display devices such as LCDs, and has a general characteristic of wide viewing angle and high luminance.

In the plasma display panel, many pixels for displaying a screen are arranged in a matrix form. In the plasma display panel, each pixel is driven in a manner of simply applying a voltage to an electrode, that is, a passive matrix method, without an active element for driving the pixel. The plasma display panel may be classified into a direct current type and an alternating current type according to the type of the voltage signal for driving each electrode, and may be divided into an opposing type and a surface discharge type according to the arrangement of the two electrodes to which the discharge voltage is applied.

In the case of the alternating current type, since the electrode is covered with the dielectric layer, it naturally has a capacitance, the current flowing through the electrode is limited, and the electrode is easily protected from the ion shock during discharge. As a result, the electrode lifetime is also long.

In a typical AC surface discharge plasma display panel, a plurality of address electrodes are formed in parallel with each other in the surface discharge plasma display panel inside one of two substrates. The display electrode and the scan electrode, which may be collectively referred to as sustain electrodes inside the same substrate or another substrate, are alternately formed horizontally in parallel with each other. Each cell constituting the pixel corresponds to an address electrode as one vertical electrode, a scan electrode and a display electrode as two horizontal electrodes, and the address electrode and the sustain electrode cross each other vertically.

In the top-emitting plasma display device, the sustain electrode of the cell may be formed as a transparent electrode so that the sustain electrode does not interfere with the optical path, and the transparent electrode may be horizontally connected by a bus electrode having good conductivity and a narrow width.

On the other hand, the arrangement of pixels, often referred to as a matrix form, is specifically made by formation of barrier ribs and electrodes. The partition wall may be formed in a stripe shape having a straight line only in the column direction along with the address electrode, or in a lattice shape that partitions one cell in the row direction and the column direction.

In a stripe-type barrier rib structure, adjacent cells of the panel are arranged longitudinally, on one straight line. This structure has the advantage that the process of forming the partition wall is simple, but there is a limitation in the arrangement of the sustain electrode to prevent cross talk between the upper and lower cells. That is, the spacing between the bus electrodes in the adjacent sustain electrodes among the up and down discharge cells among the sustain electrodes in the cell must be more than a certain gap than the gap between the opposing transparent electrodes in the discharge cell. Therefore, the discharge area is reduced to maintain the gap between the bus electrodes, and the discharge efficiency and the light emission efficiency are also lowered.

As a method for increasing luminous efficiency, which is one problem of a plasma display panel, Korean Patent Application No. 2001-3511 discloses a segmented electrode in Delta color arrayed in which three-color subpixels of a rectangle forming a pixel are arranged in a triangle as shown in FIG. Rectangular sub-pixel) structure is described. In the SDR structure in which each discharge cell is surrounded by the partition wall 10, the bus electrodes 51 and 61 of the sustain electrode may be disposed to overlap the partition wall 10 formed laterally, so that there is no decrease in the aperture ratio. Since the crosstalk of the vertical discharge cells is prevented, the electrode can be arranged to increase the discharge area to increase the discharge efficiency. The address electrode 80 is formed on a half pitch basis of the discharge cells and overlaps with the partition walls in some cases and the discharge cells in some cases.

Discharge cell arrangement of the SDR structure is also possible when a hexagonal discharge cell is used in addition to the rectangular discharge cell. In the hexagonal honeycomb partition wall structure, the upper row and the lower row are naturally arranged alternately by 1/2 pitch in sub-pixel units, and thus may be suitable for the SDR structure.

However, even in the SDR structure using these rectangular discharge cells or hexagonal discharge cells, the gap between the discharge gap and the partition walls and the discharge space are not sufficiently wide, so that the diffusion of the discharge within the cell space is limited and limited by the upper and lower partition walls. There is. Therefore, the amount of light that can be obtained, that is, the luminous efficiency, is limited compared to the input power.

In addition, the phosphor film formed on the panel is different depending on the formation method, but tends to be thicker on the partition surface than on the substrate surface. If the phosphor film is not sufficiently formed, the ultraviolet rays generated in the plasma discharge cannot be sufficiently used, and the luminous efficiency of visible light is lowered. Therefore, it is desired to increase the area of the partition wall where the phosphor is well formed in the panel.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display panel having a structure capable of increasing luminous efficiency compared with a conventional plasma display panel.

In connection with the purpose of increasing the luminous efficiency, an object of the present invention is to provide a plasma display panel that can secure a discharge space so that the discharge can be sufficiently diffused in the vertical direction from the center of the cell.

In addition, an object of the present invention is to provide a plasma display panel having a partition structure that can further increase the formation area of the phosphor in the unit substrate area.

The present invention for achieving the above object is any one of two substrates spaced apart at regular intervals to form a space sealed with the surrounding sealing material, partitions installed to separate the space between the two substrates, the opposite surface of the two substrates A plasma display panel comprising: an address electrode formed in one, a display electrode and a scan electrode formed on one of opposing surfaces of two substrates and parallel to each other; a discharge gas and a phosphor filled in the space;

The partition wall is formed at the outline position of the area covered when the hexagonal planes arranged in a triangle to form a concave polygon when the discharge cell is viewed from the front of the panel,

The discharge cells may be arranged vertically and horizontally to form a screen.

In the present invention, the discharge cells are formed on the screen in a positive or negative position to form a structure without a gap between the discharge cells. That is, the conventional hexagonal discharge cells are arranged in a honeycomb shape, and when the discharge cells are combined in a delta structure to form one pixel, a part of one pixel corresponds to one discharge cell in the present invention.

On the other hand, the discharge cells of the present invention can be arranged in the longitudinal direction in the same shape and phase to implement one color column. In this case, in the color column adjacent to the color column, the discharge cells form the same concave polygon, but are rotated 180 degrees in the plane to be inverted.

On the other hand, in the present invention, when the angle is not located in the upper and lower ends of the hexagon in the three hexagonal portions of the discharge cell, the discharge cells are arranged in the same form alternately the discharge cells having a 180-degree phase difference in planar shape It may also form a colored column to form.

In the present invention, the bus electrode of the sustain electrode may be formed to overlap the partition walls of the upper and lower portions of the concave polygon. When the bus electrodes overlapping the partition walls are formed only on the upper and lower ends of the concave polygons, the bus electrodes and other electrodes to which a separate signal is applied may not be formed in the space between the upper and lower ends. However, even in this case, upper and lower transparent electrodes may be formed to form gaps in upper and lower middle portions of the respective discharge cells so as to be in contact with the bus electrodes. In addition, the transparent electrode of each discharge cell may be composed of a hexagonal portion connected in one bus electrode and a narrow region of the discharge cell and a portion in which two hexagons connected in parallel with the other bus electrode and a wide region of the discharge cell are coupled side by side.

On the other hand, in the present invention, a dark material may be applied to the substrate to a part of the narrow portion of the top and bottom of each discharge cell.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 2 is a plan view schematically illustrating a state in which pixels are formed by partition walls in a part of a panel forming a screen in one embodiment according to the present invention, and FIG. 3 is a discharge of another embodiment of the present invention in which dark material is applied to a portion of a substrate. 4 is a plan view schematically illustrating a cell, and FIG. 4 is a plan view illustrating a form in which a bus electrode and a transparent electrode are formed in an embodiment according to the present invention.

Referring to FIG. 2, each discharge cell has a shape of a concave polygon formed when three hexagonal parts basically form a delta in close contact with each other in a plane. Two angles of hexagons are located at the top and bottom of the hexagon on the screen. That is, the discharge cell of the present invention corresponds to a portion corresponding to one pixel in a delta type plasma display panel having a hexagonal discharge cell.

These discharge cells are arranged up and down to form one color stripe on the entire screen as in the stripe type screen. For color display, two adjacent color stripes are of different colors. For example, if the central color is green (G), the left and right are red (R) and blue (B) colors, respectively. However, the discharge cells constituting the adjacent color stripes form a form rotated by 180 degrees, in which the shape formed by the partition wall 110 is turned up and down in plan view. Meanwhile, the boundary of the concave polygonal discharge cell is divided by the partition wall 110 through the front surface of the substrate.

When the boundary of the discharge cell is divided into the partition wall 110 by forming a concave polygon, the area of the partition wall facing the discharge cell space may be increased compared to the planar area of the discharge cell. The phosphors laminated inside the discharge cells vary in the amount applied to each part according to the stacking method, but as the area of the partition increases, the amount of the phosphor laminated on the partition increases, and the amount of light emitted by the phosphor usually increases.

Referring to FIG. 3, a dark material 120 is coated on a portion of an inner surface of an upper substrate covering each discharge cell. The dark material 120 applied to each discharge cell may have a circular, elliptical, and various other shapes. When the delta shape of the discharge cell in which the three hexagons are arranged in the delta shape, the angular part is positioned upward, the part to which the dark material 120 is applied is slightly offset upward from the middle. On the contrary, when the delta type of the discharge cell takes the inversion of the angular portion downward, the portion where the dark material 120 is applied is located slightly downward from the middle.

The application position of the dark substance is determined in this way because the luminance of the angled portions in the delta type of the discharge cell is relatively low. In other words, if the dark material is applied to the low brightness part and the reflection of external light is reduced, the brightness of the discharge cell is reduced by itself. It can be higher and advantageous.

Referring to FIG. 4, the bus electrodes 151 and 161 of the storage electrodes 150 and 160 are formed to overlap the portions of the barrier ribs 110 at the top and the bottom of the discharge cells in the display panel based on each discharge cell. As seen on the screen, patterns of the transparent electrodes 153 and 163 which form part of the sustain electrodes are formed to extend toward the center of each discharge cell. The patterns of the transparent electrodes 153 and 163 may be integrally formed in the same row regardless of the partition wall, or may be spaced apart from each discharge cell so that voltage is applied only through the bus electrodes 151 and 161 of the corresponding portion.

Since the upper and lower transparent electrode patterns 153 and 163 are asymmetrically formed in the discharge cell of the concave polygon, the method of forming the discharge gap between the upper and lower transparent electrodes may be various. That is, the lower and upper ends forming the gap of the upper and lower transparent electrodes may be formed in a horizontal straight line, and the gap may be horizontally formed at a predetermined interval. Further, as shown in FIG. 4, the upper and lower transparent electrode patterns may form one hexagon and two side by side hexagons, and the gap may be formed at a predetermined interval in a V shape. In addition, as shown in FIG. 5, auxiliary bus electrodes 155 and 165 connected to the bus electrodes 151 and 161 may be formed to effectively induce discharge in the entire discharge cell region when forming the transparent electrode. In this case, in the case where two hexagons of the transparent electrodes are connected side by side (161), the auxiliary bus electrode 165 may be formed in a direction connecting the side facing the gap and the side connected to the bus electrode 161 as its opposite side. have.

In the embodiments of the present invention, the length from the gap to the partition wall is longer than that of the conventional rectangular discharge cell shown in FIG. 1. Therefore, since the discharge triggered in the gap diffuses in a considerable section up to the partition wall, the discharge is not blocked by the partition wall as in the prior art, and thus the efficiency of the discharge is increased.

6 is a schematic plan view showing an arrangement of discharge cells in another embodiment of the present invention. In FIG. 6, the three hexagonal parts constituting the concave polygonal discharge cell are not positioned at the upper and lower ends of the hexagon when viewed on the screen, and the sides are positioned at the upper and lower ends. Therefore, the discharge cells are arranged in the same shape as compared with the embodiment of FIG. 2, and the discharge cells having a 180-degree phase difference in plan are alternately arranged up and down to form respective color stripes. Then, a color stripe having the same shape as the color stripe as a reference is formed on the side. In other words, the color stripes formed by discharging cells of each color of RGB in a row form the same shape.

According to the present invention, the area of the partition wall per area on the screen is relatively increased compared to the plasma display panel having the discharge cells of the convex polygonal shape, and thus the amount of the phosphor even when the phosphors stacked on the partition wall have the same thickness. Because of this increase, the utilization of discharge ultraviolet rays can be increased to increase the luminous efficiency.

In addition, the present invention can increase the length from the gap in the discharge cell to the partition wall, thereby increasing the discharge efficiency compared to the plasma display panel adopting the conventional quadrilateral or hexagonal discharge cells.

In addition, according to the present invention, it is also possible to increase the bright room contrast by applying a dark substance to the substrate having a relatively low luminance in the discharge cell.

Claims (8)

Two substrates spaced at regular intervals to form a sealed space with the surrounding sealing material, partition walls installed to separate the spaces between the two substrates, an address electrode formed on one of opposing surfaces of the two substrates, and A plasma display panel including a sustain electrode formed on one of the opposing surfaces and parallel to each other, a discharge gas and a phosphor filled in the space, The partition wall is formed at the outline position of the area covered when three planar hexagons are arranged in a triangle so that the discharge cells defined by the partition wall form a concave polygon when viewed from the front of the panel, And the discharge cells are arranged vertically and horizontally to form a screen. The method of claim 1, And wherein the discharge cells are formed on the screen formed by the panel in the opposite or inverted order to form a structure without a gap between the discharge cells. The method of claim 1, The partition wall is a plasma display panel characterized in that the angular portion of the hexagon in the discharge cell in the upper and lower ends of the hexagon when viewed on the screen. The method of claim 1, And the partition wall is formed such that two sides of the hexagon come in the upper and lower ends of the hexagon in the discharge cell when viewed on a screen. The method of claim 1, The discharge cells are arranged in the longitudinal direction in the same shape and phase to realize one color column. And wherein the discharge cells have a phase difference of 180 degrees with the same shape in another color column adjacent to the color column. The method of claim 1, The sustain electrode has a bus electrode formed in a zigzag pattern overlapping with the partition wall and a transparent electrode electrically connected to the bus electrode and extending toward the center of the discharge cell, Plasma display panels, characterized in that the gap between the two upper and lower transparent electrodes in the discharge cell to form a V-shape, the two transparent electrodes are formed of one hexagon and the two hexagons are connected side by side. . The method of claim 6, An auxiliary bus electrode formed on the transparent electrode toward the gap from the bus electrode; And wherein the auxiliary bus electrode is formed in a direction connecting a side facing the gap and a side connected to the bus electrode as its opposite side, wherein the two hexagons of the transparent electrodes are connected side by side. The method of claim 1, And a dark material is applied to the substrate at a portion of the narrow upper and lower portions of the concave polygonal discharge cell.

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