KR100670314B1 - Plasma display panel - Google Patents

Abstract

The present invention discloses a plasma display panel capable of inducing discharge in a non-discharge region to increase phosphor efficiency to improve light emission luminance.

The plasma display panel of the present invention includes a front substrate and a rear substrate disposed to face each other; A front dielectric layer and a back dielectric layer formed on the front substrate and the back substrate, respectively; Address electrodes disposed in the back dielectric layer; Discharge cells provided between the front substrate and the rear substrate by partition walls and discharged therein; Phosphor layers disposed in each of the discharge cells and having any one color of red, green, and blue; Bus electrodes arranged in the front dielectric layer in pairs with each of the discharge cells in a direction crossing the address electrodes; Protruding electrodes are disposed to extend from the bus electrodes to the center of each discharge cell.

Each discharge cell includes a discharge cell and an auxiliary discharge cell, and the protruding electrodes are disposed to correspond to the discharge cells of each discharge cell, and have auxiliary electrodes disposed to correspond to the auxiliary discharge cells.

Description

Plasma display panel {Plasma display panel}

1 is a cross-sectional view of a unit discharge cell of a conventional plasma display panel;

2 is an exploded perspective view illustrating a part of the plasma display panel according to an embodiment of the present invention;

3 is a partial plan view showing an arrangement state of sustain electrode pairs in a discharge cell in the plasma display panel shown in FIG. 2;

<Brief description of symbols for the main parts of the drawings>

200 ... plasma display panel 210 ... front substrate

220 ... back substrate 230 ... address electrode

240, 245 dielectric layer 250 protective layer

260 ... discharge holding electrode pair 270, 275 ... discharge area

280, 285 ... phosphor 290 ... bulkhead

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 capable of improving discharge efficiency by inducing discharge in a non-discharge region to increase phosphor efficiency.

In general, a plasma display panel is a flat panel display device that discharges a sealed discharge gas between two substrates on which electrodes are formed, and excites a phosphor layer by ultraviolet rays generated by the discharge to realize a desired image.

The display device employing such a plasma display panel has a large screen, high quality, ultra-thin, light weight and excellent wide viewing angle, and is simpler to manufacture than other flat panel display devices and is easy to be enlarged. As the spotlight.

The plasma display panel is classified into a direct current (DC) type, an alternating current (AC) type, and a hybrid type according to a driving voltage applied to a discharge cell, and classified into a counter discharge type and a surface discharge type according to an arrangement of electrodes.

The DC plasma display panel has a structure in which all electrodes are exposed to a discharge space, and charges are directly transferred between corresponding electrodes. On the other hand, in the AC plasma display panel, at least one electrode is embedded in the dielectric layer, and discharge is performed by an electric field of wall charge instead of direct charge transfer between the corresponding electrodes.

In the opposite discharge type plasma display panel, an address electrode and a sustain electrode are provided to face each pixel, and addressing discharge and sustain discharge are generated between the two electrodes. On the other hand, in the surface discharge plasma display panel, an address electrode and corresponding X and Y electrodes are provided for each unit pixel to generate addressing discharge and sustain discharge.

BACKGROUND ART A direct current type plasma display panel has been recently adopted a plasma display panel having an alternating surface discharge structure due to a problem of direct charge transfer between corresponding electrodes, causing serious electrode damage.

1 illustrates a unit discharge cell of a conventional plasma display panel 100.

Referring to FIG. 1, the plasma display panel 100 includes a front substrate 110 and a rear substrate 120 disposed to face the front substrate 110. An inner surface of the front substrate 110 includes an X electrode 161 and a Y electrode 165, and a bus electrode 163 electrically connected to the X and Y electrodes 161 and 162.

In addition, a front dielectric layer 145 is formed on the inner surface of the front substrate 110 to cover the X electrode 161, the Y electrode 165, and the bus electrode 163, and a surface of the front dielectric layer 145. The protective film 180 is coated on.

An address electrode 130 formed on an inner surface of the back substrate 120 and disposed to cross the X and Y electrodes 161 and 165, and a back surface disposed to cover the address electrode 130. Dielectric layer 141 is provided. The discharge space 190 is defined by the barrier rib 150 disposed between the front and rear substrates 110 and 120, and the barrier rib 150, the front substrate 210, and the rear substrate 220 are defined by the barrier rib 150. The phosphor layer 170 is disposed in the limited discharge space 190.

In the AC type 3 electrode surface discharge plasma display panel 100, an address electrode 230 is formed on a rear substrate 220, and X and Y electrodes 261 and 265 are formed on a front substrate 210. The sustain discharge occurs in the discharge cell selected by the addressing operation to emit visible light to the front substrate.

In order to improve the exhaust efficiency of the conventional plasma display panel 100 and to reduce the unit light, the plasma display panel divides one discharge cell into a discharge area and a non-discharge area so that the sustain discharge of the discharge cell is performed only in the discharge area. Proposed.

The conventional plasma display panel that divides one discharge cell into a discharge area and a non-discharge area is advantageous in terms of reducing unit light, because discharge is performed only in the discharge area of the discharge cells when the application of an address voltage is applied. Rather, the emission luminance is decreased, which causes a problem of decreasing the efficiency of the panel.

The present invention is to solve the above problems, by applying a phosphor not only in the discharge region but also in the non-discharge region to induce discharge in the non-discharge region to increase the phosphor efficiency, thereby improving the plasma luminance of the panel The purpose is to provide a display panel.

In order to achieve the above object, the present invention includes a front substrate and a rear substrate disposed to face each other; A front dielectric layer and a back dielectric layer formed on the front substrate and the back substrate, respectively; Address electrodes disposed in the back dielectric layer; Discharge cells provided between the front substrate and the rear substrate by partition walls and discharged therein; Phosphor layers disposed in each of the discharge cells and having any one color of red, green, and blue; Bus electrodes arranged in the front dielectric layer in pairs with each of the discharge cells in a direction crossing the address electrodes; Protruding electrodes arranged to extend from the bus electrodes to the center of each of the discharge cells,

Each discharge cell includes a discharge cell and an auxiliary discharge cell, wherein the protruding electrodes are disposed in correspondence with the discharge cell of each discharge cell, and have a plasma display panel including an auxiliary electrode part disposed corresponding to at least some of the auxiliary discharge cells. It is characterized by providing.

A phosphor layer having the one color is disposed in at least some of the auxiliary discharge cells of the discharge cells, and discharge is induced by the auxiliary electrode part of the protruding electrode.

Phosphor layers for realizing the same color are disposed in the discharge cells and the auxiliary discharge cells of each cell.

Each protruding electrode has a main body portion whose width is constant; An inclined extension portion formed to have a narrow width from the main body portion toward the bus electrode; And a parallel extension part extending from the inclined extension part toward the bus electrode and having a width equal to a width of an end portion of the inclined extension part, wherein the auxiliary electrode part protrudes from the parallel extension part to an auxiliary discharge cell with the same width. do.

In addition, the present invention and the front substrate and the rear substrate disposed opposite each other; A front dielectric layer and a back dielectric layer formed on the front substrate and the back substrate, respectively; Address electrodes disposed in the back dielectric layer; Discharge cells provided by the partition wall between the front substrate and the rear substrate, each of the discharge cells having discharge and discharge cells formed therein; Phosphor layers disposed in each of the discharge cells and having any one color of red, green, and blue; Bus electrodes arranged in the front dielectric layer in pairs with each of the discharge cells in a direction crossing the address electrodes; First protruding electrodes arranged to extend from the bus electrodes to a center of a discharge cell of each discharge cell; Second protruding electrodes arranged to extend from the bus electrodes to a center of at least a portion of an auxiliary discharge cell of each of the discharge cells,

The discharge cell of each of the discharge cells is induced by the first protruding electrode, and the auxiliary discharge cell is characterized by providing a plasma display panel which is induced by the second protruding electrode.

A phosphor layer having the one color is disposed in at least some of the auxiliary discharge cells of the discharge cells, so that discharge is induced by the second protrusion electrode.

Phosphor layers for realizing the same color are disposed in the discharge cells and the auxiliary discharge cells of each cell.

The first protruding electrode includes a main body having a constant width; An inclined extension portion formed to have a narrow width from the main body portion toward the bus electrode; And a parallel extension part extending from the inclined extension part toward the bus electrode and having a width equal to a width of an end portion of the inclined extension part.

The second protruding electrode has the same width as that of the parallel extension of the first protruding electrode and protrudes from the bus electrode to the center of the auxiliary discharge cell.

The first and second protrusion electrodes are made of the same material.

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

2 is an exploded perspective view showing a portion of the plasma display panel according to the embodiment of the present invention cut away. FIG. 3 is a plan view illustrating an arrangement state of sustain electrode pairs in a discharge cell in the plasma display panel of FIG. 2.

2 and 3, the plasma display panel 200 according to an exemplary embodiment of the present invention includes a front substrate 210 and a rear substrate 220 disposed to face the front substrate 210. The front substrate 210 includes a transparent glass substrate including components such as PbO, SiO 2, B 2 O 3, and the like so that visible light for displaying an image can be transmitted therethrough. The back substrate 220 also includes a transparent glass substrate similar to the front substrate 210.

In this case, since the back substrate 220 is not positioned on a path through which visible light generated in the discharge space 190 of the discharge cell travels, the rear substrate 220 does not necessarily have to be a transparent glass substrate, and a substrate member such as plastic or metal may be used. It can also be equipped. The front substrate 210 and the rear substrate 220 are sealed to each other by frit glass.

The front dielectric layer 2450 and the rear dielectric layer 240 are formed on the front substrate 210 and the rear substrate 220, respectively. The front substrate 210 and the rear substrate 220 are each made of a dielectric such as PbO, B 2 O 3, SiO 2, and the like. The front dielectric layer 245 is covered by a protective film layer 250 such as MgO.

The address electrode 230 is arranged on the inner surface of the back substrate 220. The address electrodes 230 are arranged in a direction parallel to the Y direction and have a stripe shape arranged to be spaced apart by a predetermined interval in the X direction. The address electrode 230 is arranged for each discharge cell 270, and may include a metal material having excellent conductivity, for example, Ag, Au, Cu, or the like.

In the exemplary embodiment of the present invention, the address electrode 230 has a stripe-shaped pattern to correspond to each discharge cell 270 in order to apply a voltage for selecting the discharge cell 270 to start discharge. Rather than the shape of the discharge cell 270 may have a variety of patterns.

The address electrode 230 is covered by a back dielectric layer 240 formed on the back substrate 220 to be embedded. In the exemplary embodiment of the present invention, the back dielectric layer 240 is formed on the back substrate so as to cover only the X electrode 261. However, the back dielectric layer 240 may be formed on the front surface of the substrate.

A plurality of discharge cells 270 are partitioned between the front dielectric layer 245 of the front substrate 210 and the rear dielectric layer 240 of the rear substrate 220 to prevent crosstalk between the discharge cells. Partition 290 is disposed. The partition wall 290 is arranged in parallel with the address electrode 230, that is, in parallel with the Y direction, and in a direction crossing the address electrode 230, that is, in parallel with the address electrode 230. A plurality of longitudinal bulkheads 292 are provided.

The discharge cell 270 is a portion partitioned by the partition wall 290 and includes a discharge cell 271 and an auxiliary discharge cell 275 to be separated by the partition wall 290. The auxiliary discharge cells 275 are disposed between the plurality of discharge cells 271, and the auxiliary discharge cells 275 are arranged in a direction parallel to the address electrodes 230 of the plurality of discharge cells 270, that is, in the Y direction. It is disposed between neighboring discharge cells 270, and is arranged in a direction crossing the address electrode 230, that is, in the X direction.

In the present exemplary embodiment, the discharge cell 270 and the auxiliary discharge cell 275 constituting the discharge cell 270 are both horizontal bulkheads 291 and vertical bulkheads 292 as shown in FIGS. 2 and 3. Although it is formed by having a rectangular parallelepiped shape, the discharging cell 271 and the auxiliary discharge cell 275 may not only have different shapes, but are limited to the structure and arrangement shown in FIGS. 2 and 3. It may have various structures and arrangements.

In the embodiment of the present invention, the partition wall 290 has a lattice shape formed by the horizontal partition wall 291 and the vertical partition wall 292, and the discharge cells 270 defined by the partition wall 290 are rectangular. Although illustrated as having a shape, the present invention is not limited thereto, and the partition wall 290 may have various shapes to form a plurality of discharge cells 270.

For example, the partition wall 290 may have a closed partition wall shape such as a matrix or delta type as well as an open partition wall shape such as a stripe type or a meander type. In addition, in the case of the closed partition wall, the discharge cells 270 formed by the partition wall 290, as in the embodiment of the present invention, may have a shape such as a circle or an oval, as well as a polygon such as a triangle or a pentagon, in addition to a rectangle. Can be.

In the present exemplary embodiment, the partition wall 290 is disposed on the rear dielectric layer 240, but the present invention is not limited thereto, and the partition wall 290 may be disposed on the rear substrate 220.

A phosphor layer 280 is disposed in the discharge cell 270, and the phosphor layer 280 is coated on an inner surface of the barrier rib 290 and an upper surface of the back dielectric layer 240 surrounded by the barrier rib 290. Is formed. The color of the phosphor layer 280 is any one of red, green, blue to implement an image, and to implement a full color image, it is preferable to have a red, green, blue phosphor layer.

 The phosphor layer 280 may be coated on any surface of the discharge cell 270, but considering the transmittance of visible light emitted from the phosphor layer 280, the side surface of the partition wall 290 and the bottom surface of the back substrate 220 are considered. It is preferable to apply so that it may cover. The red light emitting phosphor may include Y (V, P) O 4: Eu, and the green light emitting phosphor may include ZnSiO 4: Mn, YbO 3: Tb, and the blue light emitting phosphor may be BAM: Eu. Various phosphors can be used.

In the exemplary embodiment of the present invention, the phosphor layer 280 includes the main phosphor layer 281 disposed in the discharging cell 271 and the auxiliary phosphor layer 285 disposed in the auxiliary discharge cell 275. Equipped.

The main phosphor layer 281 is R, G, and B disposed in R, G, and B battery cells 272, 273, and 273 for generating visible light of red (R), green (G), and blue (B), respectively. Phosphor layers 282, 283, and 284. In addition, the auxiliary phosphor layer 285 may be disposed in R, G, and B auxiliary discharge cells 276, 277, and 278 for generating visible light of red (R), green (G), and blue (B), respectively. G, B phosphor layers 286, 287, 288.

In this case, the red R cell 272, the green G cell 273, and the blue B cell 274 function as red, green, and blue subpixels, respectively. The pixel, the green subpixel, and the blue subpixel form a unit pixel to form a unit pixel, thereby expressing a color according to a combination of three primary colors.

In addition, a discharge gas in which neon (Ne), xenon (Xe), and the like are mixed is filled in the discharging cell 271 and the auxiliary discharge cell 275, and is excited by ultraviolet rays generated during discharge to generate visible light. .

A plurality of discharge sustaining electrode pairs 260 are disposed on the front substrate 210. The discharge sustaining electrode pair 260 is covered and buried by the front dielectric layer 245. The discharge sustaining electrode pair 240 has bus electrodes 261 and protruding electrodes 262.

The bus electrodes 261 of the discharge sustaining electrode pairs 240 are paired with each of the discharge cells 271 of each of the discharge cells 270 in a direction crossing the address electrodes 230, that is, the X direction. Is placed. Since the bus electrodes 261 apply a voltage to each of the protruding electrodes 262, the bus electrodes 261 preferably include a metal having excellent conductivity, such as silver (Ag) or copper (Cu).

The protruding electrodes 262 are arranged to extend from the bus electrodes 261 to the center of each of the discharge cells 271 and are electrically connected to the bus electrodes 261.

In the present exemplary embodiment, each of the protruding electrodes 262 may have a main body portion 263 having a constant width, and an inclined extension portion formed to have a narrow width from the main body portion 263 toward the bus electrode 261. 264, a parallel extension portion 264 extending in the direction from the inclined extension portion 264 to the bus electrode 261 and having a width equal to a width of an end portion of the inclined extension portion 264; The auxiliary electrode part 266 protrudes from the extension part 264 to the center of the auxiliary discharge cell 275.

A concave portion 267 recessed in the direction of the bus electrode 261 is formed at an end portion of the main body portion 263. The protruding electrodes 262 are disposed to face each other in the discharging cell 271 of each of the discharge cells 270. Each protruding electrode 262 is preferably formed of a transparent conductive material such as indium tin oxide (ITO) to transmit visible light generated from the phosphor layer 280.

The auxiliary electrode part 266 of the protruding electrode 262 serves as an electrode for inducing a discharge in the auxiliary discharge cell 275 of the discharge cells 270, and has the same width from the parallel extension part 265. Although illustrated to have a structure that protrudes to have, but not necessarily limited to this, any structure suitable for inducing discharge in the auxiliary discharge cell 275 is possible.

In addition, although the present invention includes an auxiliary electrode portion 266 extending from the protruding electrode 262 of the discharge sustaining electrode pair 260 to apply a discharge voltage to the auxiliary discharge cell 275, the bus electrode ( One protruding electrode 262 arranged to correspond to the discharge cell 271 in a direction intersecting with 261, and an auxiliary discharge cell 275 intersecting with the bus electrode 261 and opposite to the protruding electrode 262. It may be provided with another protruding electrode arranged corresponding to

In this case, the other protruding electrode corresponding to the auxiliary discharge cell 275 has the same shape as the one protruding electrode 262 corresponding to the discharging cell 271 or the same shape as the auxiliary electrode part 266 of the protruding electrode 262. It may have a or different shape from them. These protruding electrodes may be made of the same material as each other, for example, a transparent material such as an ITO film, or may include different materials.

In the embodiment of the present invention, the phosphor layers 281 and 285 of the same color are coated on the discharge cells 271 and the auxiliary discharge cells 275 of each discharge cell 270, so that the address electrode 230 and the discharge sustaining electrode are applied. Although it is illustrated that the same color is applied to the pair 260 at the same time, the present invention is not limited thereto and may be driven by coating phosphor layers having different colors, and some of the auxiliary discharge cells 275 may be partially assisted. The phosphor layer may be applied only to the discharge cells 275 to drive only some of the auxiliary discharge cells 275.

The operation of the plasma display panel of the present invention having the configuration as described above is as follows.

First, when a predetermined address voltage is applied to one of the address electrode 230 and the discharge sustaining electrode pair 260 from an external power source, a corresponding discharge cell of the plurality of discharge cells 270 is selected, and the selected discharge cell ( Wall charges are formed in the discharging cell 271 and the auxiliary discharging cell 275 of 270.

Subsequently, when a predetermined sustain discharge voltage is applied to the discharge sustain electrode pair 260, sustain discharge occurs. As such, the charges generated by the sustain discharge collide with the discharge gas atoms in the discharge space 290 to generate a discharge to generate a plasma.

The ultraviolet rays generated by the discharge excite the fluorescent materials of the phosphor layers 281 and 285 applied to the discharge cells 271 and the auxiliary discharge cells 275 of the discharge cells 270 to generate visible light. The generated visible light is emitted from the discharge cells 270 to implement a desired image.

Compared to the plasma display panel in which the discharge occurs only in the conventional discharge cell to generate visible light, in the present invention, since the discharge occurs simultaneously in the discharge cell 271 and the auxiliary discharge cell 275, visible light is generated, thereby increasing the luminance of light emitted. .

According to the plasma display panel of the present invention as described above, by applying a phosphor to both the discharge cell and the auxiliary discharge cell of the discharge cell, by arranging the discharge holding electrode pair in the auxiliary discharge cell, as well as the auxiliary discharge cell Also in the discharge can increase the phosphor efficiency. Accordingly, there is an advantage that can increase the efficiency of the panel by increasing the light emission brightness.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (10)

A front substrate and a rear substrate disposed to face each other; A front dielectric layer and a back dielectric layer formed on the front substrate and the back substrate, respectively; Address electrodes disposed in the back dielectric layer; Discharge cells provided between the front substrate and the rear substrate by partition walls and discharged therein; Phosphor layers disposed in each of the discharge cells and having any one color of red, green, and blue; Bus electrodes arranged in the front dielectric layer in pairs with each of the discharge cells in a direction crossing the address electrodes; Protruding electrodes arranged to extend from the bus electrodes to the center of each of the discharge cells, Each discharge cell includes a kitchen discharge cell and a secondary discharge cell, The protruding electrodes are disposed corresponding to the discharge cells of each discharge cell, Each protruding electrode A main body portion whose width is constant; An inclined extension portion formed to have a narrow width from the main body portion toward the bus electrode; A parallel extension part extending from the inclined extension part toward the bus electrode and having a width equal to a width of an end portion of the inclined extension part; And an auxiliary electrode part disposed corresponding to at least some of the auxiliary discharge cells, the auxiliary electrode part having a same width from the parallel extension part and protruding to the auxiliary discharge cell. The method of claim 1, And at least some of the auxiliary discharge cells of the discharge cells are arranged with a phosphor layer having the one color, so that the discharge is induced by the auxiliary electrode part of the protruding electrode. The method of claim 2, And a phosphor layer for realizing the same color in each of the discharging cell and the auxiliary discharging cell of each cell. delete A front substrate and a rear substrate disposed to face each other; A front dielectric layer and a back dielectric layer formed on the front substrate and the back substrate, respectively; Address electrodes disposed in the back dielectric layer; Discharge cells provided by the partition wall between the front substrate and the rear substrate, each of the discharge cells having discharge and discharge cells formed therein; Phosphor layers disposed in each of the discharge cells and having any one color of red, green, and blue; Bus electrodes arranged in the front dielectric layer in pairs with each of the discharge cells in a direction crossing the address electrodes; First protruding electrodes arranged to extend from the bus electrodes to a center of a discharge cell of each discharge cell; Second protruding electrodes arranged to extend from the bus electrodes to a center of at least some of the auxiliary discharge cells of each of the discharge cells, The discharge of the discharge cell is induced by a first protruding electrode, the discharge of the auxiliary discharge cell is induced by a second protruding electrode, The first protruding electrode A main body portion whose width is constant; An inclined extension portion formed to have a narrow width from the main body portion toward the bus electrode; And a parallel extension part extending from the inclined extension part toward the bus electrode and having a width equal to a width of an end portion of the inclined extension part. The method of claim 5, And at least some of the auxiliary discharge cells of the discharge cells are arranged with a phosphor layer having the one color, so that the discharge is induced by the second protrusion electrode. The method of claim 6, And a phosphor layer for realizing the same color in each of the discharging cell and the auxiliary discharging cell of each cell. delete The method of claim 5, And the second protruding electrode has the same width as that of the parallel extension of the first protruding electrode and protrudes from the bus electrode to the center of the auxiliary discharge cell. The method of claim 5, And the first and second protruding electrodes are made of the same material.

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