KR100626070B1 - Plasma display panel - Google Patents

Abstract

An object of the present invention is to provide a plasma display panel which can induce a counter discharge at a low voltage and at the same time increase the aperture ratio to increase the transmittance of visible light. To achieve the above object, the present invention provides a transparent front substrate and A rear substrate disposed to face the front substrate, a discharge cell disposed between the front substrate and the rear substrate to define discharge cells together with the front substrate and the rear substrate to generate a discharge, and a partition wall formed of a dielectric material; Sustain electrodes disposed therein, intermediate electrodes fixed to the rear substrate, disposed between the sustain electrodes, address electrodes disposed to intersect the sustain electrode and the intermediate electrode in the discharge cell, and the discharge. A phosphor layer disposed in the cell and a discharge gas present in the discharge cell; It provides a plasma display panel to.

Description

Plasma display panel {Plasma display panel}

1 is a schematic view for explaining the difference between the surface discharge and the counter discharge,

2 is an exploded perspective view showing the plasma display panel of the present invention;

3 is a perspective view showing the arrangement of sustain electrodes, intermediate electrodes and address electrodes of the plasma display panel of the present invention;

4 is a schematic diagram for explaining an arrangement of a circuit unit and electrodes for driving a plasma display panel of the present invention;

5 is a waveform diagram showing waveforms of signals applied to the X electrode, the Y electrode, and the intermediate electrode of the present invention in one subfield;

6 is a cross-sectional view showing a form in which an address discharge occurs in a discharge cell of the plasma display panel of the present invention.

7 is a cross-sectional view showing the state of wall charges after the address discharge is completed in the discharge cells of the plasma display panel of the present invention;

8 to 11 are cross-sectional views showing a state change of wall charges when a sustain discharge occurs in a discharge cell of the plasma display panel of the present invention.

12 is an exploded perspective view showing the plasma display panel of the first modification of the present invention;

Fig. 13 is a sectional view showing a plasma display panel of a second modification of the present invention.

<Description of Symbols for Major Parts of Drawings>

100, 200, 300: plasma display panel

110, 210: front panel

120, 220: rear panel

114: electrode pair 113, 313: X electrode

112, 312: Y electrode 130: partition wall

115: second bulkhead 124: first bulkhead

117: intermediate electrode 128: intermediate dielectric layer

128a: corner of intermediate dielectric layer 125: phosphor layer

122: address electrode 230b: horizontal partition wall

230a: vertical 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 in which an aperture ratio is increased while inducing opposite discharge at a low voltage, thereby improving transmittance of visible light.

BACKGROUND ART Conventional plasma display panels (Plasma Display Panel) is a display device that implements a predetermined image by exciting the phosphor with ultraviolet rays generated by gas discharge, and has been spotlighted as a next-generation thin display device because it is possible to configure a high resolution large screen.

Conventionally, such plasma display panels are divided into AC type, DC type, and hybrid type according to the structure and driving principle, and AC type and DC type plasma display panel according to the discharge structure. Is divided into a surface discharge type and a counter discharge type, but in recent years, an AC type surface discharge plasma display panel has become popular.

In the AC type three-electrode surface discharge plasma display panel, since the sustain electrode pairs for generating the discharges are arranged on the rear surface of the front substrate on the optical path through which visible light travels, the discharge inside the discharge cell occurs in the form of surface discharge. However, in general, the surface discharge is not uniform in the discharge characteristics, the discharge amount is also relatively unsatisfactory. Therefore, the plasma display panel is driven by a high voltage in order to maintain a predetermined level of discharge in the plasma display panel. Therefore, an expensive integrated circuit chip that controls an electrical signal in such a high voltage state must be used.

In particular, since the integrated circuit chip has a larger driving voltage, the price increases, and also accounts for a large part of the manufacturing cost of the plasma display panel. Therefore, lowering the price of the integrated circuit chip is very important in the development of the plasma display panel. Part.

In the AC type three-electrode surface discharge plasma display panel, sustain electrode pairs are arranged on the rear surface of the front substrate. When the phosphor layer inside the discharge cell generates visible light, the front substrate is a member positioned on a path through which the visible light travels, and thus the pair of sustain electrodes covers the visible light. Of course, when a part of the sustain electrode pair is formed as a transparent electrode, the transmittance of visible light can be maintained to a certain degree, but the arrangement of the transparent electrodes does not prevent the visible light from decreasing. Therefore, there is a problem that the luminance of the plasma display panel is low.

An object of the present invention is to provide a plasma display panel for solving the problems described above to solve the problems presented below.

Firstly, the object of the present invention is to introduce a counter discharge to induce stable and uniform discharge of the plasma display panel and to increase the amount of discharge.

Secondly, an object of the present invention is to increase the transmittance of visible light generated in the phosphor layer by improving the aperture ratio of the plasma display panel.

Third, the discharge voltage can be generated at a low voltage, thereby lowering the driving voltage level for driving the plasma display panel, thereby lowering the price of the integrated circuit chip that controls the electrical signal applied to the plasma display panel when the plasma display panel is driven. As a result, it aims at reducing the manufacturing cost of a plasma display panel.

In order to achieve the above object, the present invention is a space between the transparent front substrate and the rear substrate disposed to face the front substrate, the front substrate and the rear substrate is disposed between the front substrate and the rear substrate to generate a discharge A barrier rib formed of a dielectric, a sustain electrode disposed in the barrier rib, intermediate electrodes fixed to the rear substrate and disposed between the sustain electrodes, and the sustain cell in the discharge cell. The present invention provides a plasma display panel including address electrodes disposed to intersect an electrode and an intermediate electrode, a phosphor layer disposed in the discharge cell, and a discharge gas existing in the discharge cell.

In this case, it is preferable that the sustain electrodes are electrode pairs formed of an X electrode and a Y electrode which extend over the plurality of discharge cells along the partition wall and face the inside of the discharge cell. In this case, it is preferable that the X electrodes have a common electrical signal applied to each of the X electrodes in response to an image signal applied from the outside because the ends of each of the X electrodes are electrically common to each other. The ends of the Y electrodes are electrically common to each other so that the electrical signals applied to each of the Y electrodes are common to each other in response to an image signal applied from the outside.

In this case, in the plasma display panel, the address electrode may be disposed between the intermediate electrode and the rear substrate. In addition, it is preferable to further include a dielectric layer disposed between the intermediate electrode and the address electrode to cover the address electrode. In addition, the intermediate electrode is preferably disposed on the entire surface of the dielectric layer.

On the other hand, the present invention is a transparent front substrate and the rear substrate disposed to face the front substrate, and disposed between the front substrate and the rear substrate, to define a discharge cell which is a space for generating a discharge together with the front substrate and the rear substrate A partition wall formed of a dielectric material, sustain electrodes disposed in the partition wall, address electrodes disposed to intersect the sustain electrodes in the discharge cell, a dielectric layer covering the address electrode, and a dielectric layer of the dielectric layer. The plasma display panel may include an intermediate electrode disposed on the front surface, a phosphor layer disposed in the discharge cell, and a discharge gas present in the discharge cell.

Meanwhile, in all of the plasma display panels, it is preferable to further include an intermediate dielectric layer disposed to cover the intermediate electrodes. In this case, the phosphor layer is preferably disposed in a space defined by the barrier rib and the intermediate dielectric layer.

In addition, it is preferable that a recess is formed on the intermediate dielectric layer so that a space is formed in a portion of the discharge cell except for a portion covering the intermediate electrode. On the other hand, the recess is preferably formed such that the intermediate dielectric layer has a corner having a predetermined angle.

Meanwhile, in all of the plasma display panels of the present invention, the intermediate electrodes preferably extend across the discharge cells in a direction parallel to the direction in which the sustain electrodes extend.

On the other hand, in the plasma display panel of the present invention, the sustain electrodes are electrode pairs formed of an X electrode and a Y electrode extending across the plurality of discharge cells along the partition wall and facing the inside of the discharge cell. It is preferable. In this case, it is preferable that the X electrodes have a common electrical signal applied to each of the X electrodes in response to an image signal applied from the outside because the ends of each of the X electrodes are electrically common to each other. The electrodes preferably have a common electrical signal applied to each of the Y electrodes in response to an image signal applied from the outside because the ends of the Y electrodes are electrically common to each other.

The X electrode may include at least one electrode, and the Y electrode may include at least one electrode.

On the other hand, in all of the plasma display panels of the present invention, the intermediate electrode preferably includes at least one electrode.

Meanwhile, in all of the plasma display panels of the present invention, the intermediate electrodes are electrically separated from each other by the ends of the intermediate electrodes, and electrical signals applied to each of the intermediate electrodes correspond to image signals applied from the outside. It is preferable to separate.

Meanwhile, in all of the plasma display panels of the present invention, the address electrodes are electrically separated from each other by the ends of the address electrodes, and electrical signals applied to each of the address electrodes correspond to image signals applied from the outside. It is preferable to separate.

On the other hand, in all of the plasma display panel of the present invention, the partition wall is preferably arranged in a stripe form extending in one direction.

On the other hand, in all of the plasma display panel of the present invention, the partition wall preferably includes a horizontal partition wall extending in one direction and a vertical partition wall extending in a direction crossing the horizontal partition wall, wherein the intermediate electrode is the vertical partition wall It is preferable to cover by.

Meanwhile, in the plasma display panel of the present invention, the partition wall may include a second partition wall disposed behind the front substrate and a first partition wall disposed between the second partition wall and the rear substrate. Preferably, the sustain electrodes are arranged in the field. In addition, the phosphor layer is preferably disposed in a space defined by the first partition and the back substrate. In addition, the second partition wall is preferably fixed to the front substrate, the first partition is preferably fixed to the back substrate.

Hereinafter, the plasma display panel 100 of the present invention will be described with reference to FIGS. 1 to 11.

First, with reference to Figure 1 will be described with respect to the surface discharge and the counter discharge which became the background of the present invention. At this time, Figure 1a is a schematic diagram for explaining the form in which the surface discharge occurs, Figure 1b is a schematic diagram for explaining the form in which the 90 ° surface discharge occurs, Figure 1c illustrates a form in which the opposite discharge occurs A schematic diagram is shown to illustrate.

At this time, the electrode pair 20 is arrange | positioned on the same plane in FIG. 1A, and the dielectric layer 30 is arrange | positioned so that this electrode pair 20a may be covered. At this time, when a predetermined potential is applied to each of the electrode pairs to form a potential difference between the electrode pairs 20a, a predetermined electric field 10a is formed on the surface of the dielectric layer 30a by the potential difference. At this time, the charged particles are accelerated by the electric field formed on this surface to cause a discharge.

In FIG. 1B, the dielectric layer 30b is formed at an angle of 90 degrees, and an electrode is disposed on each side of the dielectric forming the angle to form an electrode pair 20b. In this case, in FIG. 1B, the electric field 10b is formed by the electric potential applied to the electrode pair 20b, and the charged particles are accelerated by the electric field 10b to generate a discharge.

On the other hand, in Figure 1c is arranged so that the electrodes are opposed to each other, the dielectric layer is covered for each electrode so that the electrode pair 20c is arranged to face each other, it is shown that the potential applied to the electrode pair 20c As a result, an electric field 10c is formed and the charged particles are accelerated to generate discharge.

At this time, look at the amount of accelerated charged particles and the kinetic energy level of the charged particles according to the shape shown in Figure 1a to 1c, respectively. Referring to FIG. 1A, when a voltage difference is formed in the electrode pair 20a and an electric field 10a is formed on the front surface of the dielectric layer, charged particles are accelerated by the electric field 10a to be perpendicular to the front surface of the dielectric layer 30a. It is accelerated in one direction first, and then returns to the front surface of the dielectric layer 30a to have the kinetic energy, and some of the kinetic energy cannot be returned to the front surface of the dielectric layer. The amount of becomes small. However, in FIG. 2B this characteristic is relaxed compared to FIG. 1A, so that more charged particles are accelerated, and their kinetic energy also reaches a relatively high level.

In addition, since the electrodes of the electrode pairs 20c are arranged to face each other in the form as shown in FIG. 1C, the electric field acts in the form of the movement of the charged particles in all the trajectories of the movement of the charged particles between the electrode pairs 20c. And almost all of the charged particles are uniformly accelerated by the electric field.

Therefore, by this characteristic, the amount of charged particles accelerated to a predetermined level or more as a result is the largest, thereby increasing the amount of discharge. Moreover, the discharge state is also kept uniform. Therefore, in view of these characteristics, it can be seen that the opposite discharge is most preferable in order to cause discharge in the plasma display panel.

Hereinafter, the plasma display panel 100, which is a preferred embodiment of the present invention, will be described with reference to FIGS. 2 to 11. First, the plasma display panel 100 of the present invention will be described with reference to FIGS. 2 to 3.

Plasma display panel 100 according to the present invention shown in Figure 2 is manufactured separately to facilitate the manufacturing process and the front panel 110, the edge is sealed and then coupled by a coupling member such as a frit (Frit) and The rear panel 120 is provided.

On the other hand, the front panel 110 is provided with a front substrate 111 formed of a transparent material, preferably soda glass.

In addition, the plasma display panel 100 of the present invention may be disposed between the front substrate 111 and the rear substrate 121 to discharge the discharge cells 126 which are spaces that generate a discharge together with the front substrate 111 and the rear substrate. And a barrier rib 130 formed of a dielectric material.

In this case, the partition wall 130 is a second partition wall that is fixed to the front substrate 111, more specifically, the rear panel 111a of the front substrate in order to simplify the manufacturing process. 115, and the rear panel 120 may include a first partition 124 disposed between the second partition 115 and the rear substrate 121.

In this case, the second partition wall is fixed to the front substrate may mean that the second partition wall may be disposed on the back surface of the front substrate, other layers may be inserted between the second partition wall and the front substrate. However, the position of the second partition wall is determined by the position of the front substrate. Therefore, in this sense, the second partition wall may be fixed to the front substrate.

Meanwhile, the partition 130 may be formed of a glass component including elements such as Pb, B, Si, Al, and O, and, as necessary, fillers such as ZrO 2, TiO 2, and Al 2 O 3. And it may be formed of a dielectric including pigments such as Cr, Cu, Co, Fe, TiO2. At this time, when the electrode pair 114 to be described later is disposed in the partition wall, and a pulse voltage is applied to the electrode pairs 114, an electric field is formed in the discharge cell 126 by the pulse voltage. By this, charged particles are induced and wall charges participating in the discharge are accumulated. The dielectric enables driving through the memory effect by inducing charged particles to accumulate such wall charges, and protects the electrode pairs 114 from being damaged due to collision of charged particles accelerated during discharge.

In addition, the front panel 110 extends over the plurality of discharge cells 126 along the second partition wall in the second partition walls 115 and faces the inside of the discharge cell 126 to each other. The electrode pairs 114 which consist of the X electrode 113 and the Y electrode 112 are shown.

 In this case, the electrode pairs 114 are not necessarily provided in the form of a pair, and may be configured in various ways according to the driving method or the luminous efficiency charging characteristic of the phosphor. In addition, all of the electrode pairs 114 are collectively referred to as sustain electrodes in the sense of an electrode causing a sustain discharge to be described later. Therefore, in the present specification, the electrode pair 114 is considered to mean a sustain electrode.

Meanwhile, as described above, since the electrode pairs 114 are disposed in the partition wall 130, the electrodes do not need to be disposed on the rear surface of the front substrate, unlike the conventional AC three-electrode surface discharge plasma display panel. Therefore, since visible light generated in the phosphor layer 125 described later passes only through the front substrate 111, the transmittance of visible light is greatly increased.

On the other hand, since the electrode pairs 114 are disposed in the second partition wall 115, the electrode pairs 114 are formed on an optical path that is a path through which visible light passes, unlike a conventional AC three-electrode surface discharge plasma display panel. Therefore, it is not necessary to be formed in a transparent ITO electrode, and can be formed of Ag, Cu, Cr, or the like having good electrical conductivity.

Meanwhile, the front panel 110 includes a passivation layer 116 disposed to cover the side surface 115a of the second partition wall 115 in the discharge cell 126. In this case, the passivation layer 116 may be disposed by a deposition method using MgO or the like, and the passivation layer 116 is not disposed on the optical path of visible light, and thus has excellent emission characteristics and strong durability of secondary electrons. It may be formed of a material such as carbon nanotubes (CNT). On the other hand, the carbon nanotubes may be disposed by the CVD method or the like in addition to the deposition.

On the other hand, the rear panel 120 is preferably provided with a back substrate 121 formed of soda glass or the like. In this case, since the back substrate 121 is not a component located on an optical path through which visible light generated in a discharge cell travels, the rear substrate 121 does not necessarily need to be formed of transparent glass, and may reduce reactive power or reduce weight. Or other materials such as plastic or metal.

Meanwhile, the rear panel 120 includes address electrodes 122 disposed in the discharge cell 126 to intersect the sustain electrode 114 and the intermediate electrode 117. In this case, the address electrode 122 may be disposed between the intermediate electrode 117 and the rear substrate 121, which will be described later, and more specifically, may be disposed on the front surface 121a of the rear substrate.

In this case, the address electrode 122 is disposed on the front surface 121a of the rear substrate, and the position thereof is not limited. In some cases, a layer having a specific function on the front surface of the rear substrate, for example, heat conduction, may be used. Layers, electromagnetic shielding layer, near infrared shielding layer, ultraviolet reflecting layer, infrared reflecting layer may be provided for various purposes, such that the arrangement position of the address electrode 122 is not limited to the front surface of the back substrate.

Meanwhile, since the address electrode 122 must perform an address discharge with the intermediate electrode 117 to be described later, the address electrode 122 needs to be insulated from the intermediate electrode 117. Accordingly, the rear panel 120 may further include a dielectric layer 123 covering the address electrode 122.

On the other hand, the dielectric layer 123 needs to be formed to a sufficient thickness so that the dielectric breakdown does not occur due to the potential applied between the address electrode 122 and the intermediate electrode 117, which will be described later, preferably about 30㎛ or more. .

The address electrode 122 may also be formed of Ag, Cu, Cr, or the like having good electrical conductivity since the address electrode 122 is not positioned on an optical path that is a path through which visible light generated in the phosphor layer 125 described later.

Meanwhile, the rear panel 120 includes an intermediate electrode 117 disposed between the sustain electrodes 114, and more particularly, disposed on the front surface 123a of the dielectric layer 123. In this case, the intermediate electrode 117 is not necessarily disposed on the front surface 123a of the dielectric layer, and has a specific function between the intermediate electrode 117 and the dielectric layer 123, for example, as described above. The same ultraviolet reflecting layer, visible light reflecting layer and the like may be disposed.

On the other hand, the dielectric layer 123 may be formed to have a thick thickness as described above to prevent the dielectric breakdown that may occur between the intermediate electrode 117 and the address electrode 122, and to increase the thickness of the dielectric layer ( 123 may be formed of a plurality of layers.

In addition, the intermediate electrodes 117 may extend across the discharge cells in a direction parallel to the direction in which the electrode pairs 114 extend.

Meanwhile, the rear panel preferably includes an intermediate dielectric layer 128 disposed to cover the intermediate electrodes 117. In this case, when a pulse voltage or the like is applied to the intermediate electrode, the intermediate dielectric layer 128 enables the charged particles to be driven by a memory effect, and the intermediate electrode 117 collides with the accelerated charged particles. The intermediate electrode 117 is prevented from being damaged.

Meanwhile, in the intermediate dielectric layer 128, after the address electrodes 122 are disposed on the front surface 121a of the back substrate 121, the dielectric layer 123 is disposed to cover the address electrodes 122, and then the After the intermediate electrode 117 is disposed on the dielectric layer 123, the intermediate dielectric layer 128 may be disposed.

When the intermediate dielectric layer 128 is disposed, the first partition wall 124 may be disposed on the entire surface of the intermediate dielectric layer. On the other hand, the arrangement of the electrodes can be easily formed by a photolithography method, a screen printing method or the like.

The recess 127 may be formed on the intermediate dielectric layer 128 such that a space is formed in a portion of the discharge cell 126 except for a portion of the discharge cell 126 that covers the intermediate electrode 117. At this time, the concave portion 127 is charged between the intermediate electrode 117 and the address electrode 122 when a predetermined pulse voltage or the like is applied, the charge particles are accelerated so that the discharge can occur substantially. It provides a space where it can be, and additionally provides a space for the phosphor can be applied.

On the other hand, the concave portion 127 can be easily formed by etching, photolithography, or the like.

On the other hand, the concave portion 127 is preferably formed so that the intermediate dielectric layer 128 has an edge (128a) having a predetermined angle. In this case, when the concave portion 127 is formed such that the edge 128a is provided in the intermediate dielectric layer 128, when a predetermined potential is applied to the intermediate electrode 117, an equipotential surface formed in the intermediate dielectric layer ( El) of FIG. 6 is formed to have a predetermined angle at the corner 128a.

At this time, the equipotential surface consequently concentrates the electric field on the corner 128a, thereby facilitating the acceleration of the charged particles existing in the discharge cell 126 during address discharge and sustain discharge described later.

Meanwhile, the rear panel 120 includes a phosphor layer 125 disposed in the discharge cell 126. In this case, the scope of the present invention is not limited by the arrangement position of the phosphor layer 125, and the phosphor layer 125 is a space defined by the first partition 124 and the rear substrate 121, and an intermediate portion thereof. When the dielectric layer 128 is disposed, the intermediate dielectric layer 128 and the first partition wall 124 are disposed in a space defined by the dielectric layer 128.

In addition, when the concave portion 127 is formed on the intermediate dielectric layer 128, the phosphor layer 125 is the concave portion that is a space defined by the first partition 124 and the intermediate dielectric layer 128. It is preferable to arrange the phosphor layer 125 in 127 to form an address discharge space.

Meanwhile, the phosphor layer 125 may be divided into red, green, and blue light emitting phosphor layers so that the plasma display panel may realize a color image, and the red, green, and blue light emitting layers may be disposed. The light emitting phosphor layers may be disposed inside the discharge cell to form a unit pixel for implementing a color image.

In this case, the disposing process of the phosphor layer 125 is a phosphor paste in which any one of a phosphor, a solvent, and a binder of a red light emitting phosphor, a green light emitting phosphor, and a blue light emitting phosphor is mixed in a space where the phosphor layer 125 is disposed. After application, it may be formed by drying and firing.

In this case, examples of the phosphor that can be used for the phosphor layer 125 include (Y, Gd) BO3: Eu3 +, and the like as the red light-emitting phosphor, and Zn2Si04: Mn2 + and the like, and the blue light-emitting phosphor. As BaMgAl 10 O 17: Eu 2+, etc., various phosphors may be used.

Meanwhile, the discharge cells in which the red, green, and blue light emitting phosphor layers are disposed may be adjacent to each other in one direction to form a unit pixel which is a basic unit for realizing an image. However, the arrangement of the discharge cells 126 of the present invention is not limited to being arranged in one direction as described above to implement a color image, and in some cases, the width of the discharge cells 126 according to the efficiency of the phosphor. However, they can be of different lengths, and their arrangement can vary from lattice to delta.

Meanwhile, in the plasma display panel 100 of the present invention, as shown in FIG. 2, the partition wall 130 is disposed in a stripe form extending in one direction. At this time, since the partition wall 130 is arranged in a stripe shape, the plasma display panel can be easily charged with the discharge gas and exhaust of the impurity gas. In addition, the movement of the charged particles is facilitated, and it becomes easy to start discharge.

However, such a stripe-shaped partition wall 130 may cause cross talk between discharge cells, and therefore, there is also a problem in that color mixing between discharge cells occurs. Overcoming this problem will be described later in the plasma display panel 200 of the first modification of the present invention.

Meanwhile, the front panel 110 and the rear panel 120 are combined and sealed by a coupling member such as a frit (not shown), and inside the discharge cell, 10% x and xen gas is formed. Neon (Ne), helium (He), or argon (Ar) including any one or a discharge gas consisting of a mixture of two or more of these are filled. In this case, since the discharge gas is generally filled at a pressure lower than atmospheric pressure, the front panel 110 and the rear panel 120 are supported by the partition wall 130.

Hereinafter, the arrangement of the electrodes of the present invention will be described in more detail with reference to FIG. 3. First, the X electrode 113 and the Y electrode 112 extend in the x-axis direction along the partition wall 130, and the intermediate electrode 117 is disposed between the X electrode 113 and the Y electrode 112. Preferably located and extending in the x-axis direction parallel to the X and Y electrodes.

The address electrode 122 may be disposed to extend in the y axis direction crossing the discharge cells 126 and crossing the electrode pair 114 and the intermediate electrode 117.

The overall arrangement of the X electrode 113, Y electrode 112, and address electrode 122 electrodes of the plasma display panel 100 will be described with reference to FIG. 4. An electrical signal in the form of a potential is applied to the electrodes.

The X electrode 113 has X electrodes X1... Xn extending in the horizontal direction of the plasma display panel, and the Y electrode 112 has the Y electrodes Y .. .Yn) is arranged.

In addition, the discharge electrode 126 is divided into red, green, and blue light emitting phosphors, and the discharge cells generating red, green, and blue visible light are repeatedly arranged in the horizontal direction, and the X electrode Address electrodes AR1.AG1, AB1 ... ARm, which are arranged in the longitudinal direction of the plasma display panel 100 in a direction intersecting with the (X1 ... Xn) and Y electrodes Y1 ... Yn, ABm, AGm) are arranged. Intermediate electrodes M1... Mn extending in the horizontal direction of the plasma display panel are disposed to intersect the address electrodes and be parallel to the X and Y electrodes.

Meanwhile, the plasma display apparatus illustrated in FIG. 4 includes a plasma display panel 100, an image processor 66, a logic controller 62, an address driver 63, an intermediate electrode driver 67, an X electrode driver 64, and the like. The Y electrode driver 65 is included. The image processor 66 processes an external image signal to generate an internal image signal including red (R), green (G), and blue (B) digital image data, a clock signal, and vertical and horizontal synchronization signals.

The logic controller 62 generates drive-control signals SA, SM, SY, and SX in accordance with an internal image signal from the image processor 66. The address electrode driver 63 processes the address signals SA from the logic controller 62 to generate electrical signals in the form of potentials, and transmits the electrical signals to the address electrodes AR1, AG1, AB1. ABm). The intermediate electrode driver 67 operates in accordance with the intermediate electrode drive-control signal SM from the logic controller 62 to apply electrical signals in the form of a potential to the intermediate electrodes M1, ..., Mn.

The X electrode driver 64 also operates from the logic controller 62 in accordance with the X drive-control signal SX to drive the X electrodes X1, ..., Xn. The Y electrode driver 64 operates in accordance with the Y drive-control signal SY from the logic controller 62 to drive the Y electrodes Y1, ..., Yn.

At this time, the ends of each of the X electrodes X1... Xm are electrically common to each other, and thus an electrical signal applied to each of the X electrodes in response to an image signal applied from the outside. More specifically, the X electrode driver It is preferable that electrical signals applied in the form of potentials from 64 are common to each other.

On the other hand, the ends of each of the Y electrodes (Y1 ... Ym) are electrically common to each other, the electrical signal applied to each of the Y electrodes corresponding to the image signal applied from the outside, more specifically the Y electrode driver It is preferable that electrical signals applied in the form of electric potential from 65 are common to each other.

Meanwhile, at this time, each of the X electrodes is electrically connected to each other so that the entire X electrodes can be controlled by only one driving circuit, and each of the Y electrodes is electrically connected to each other so that only one driving circuit is used. Since the entire Y electrodes can be controlled, the driving circuit is not stretched due to the arrangement of the intermediate electrodes. As a result, the manufacturing cost of the plasma display panel does not increase.

Meanwhile, in order to perform address discharge, a scan pulse is sequentially applied to each of the intermediate electrodes M1, ..., Mn, and at the same time, an address is applied to the address electrode lines selected from the address electrodes AR1, ..., ABm. A pulse is applied. Next, all of the X electrode lines X1,..., Xn and all of the Y electrode lines Y1, so as to cause a sustain discharge displaying a predetermined gray scale in the discharge cells 126 selected by the address discharge. ..., Yn), and a sustain pulse is alternately applied, and a sustain discharge occurs with the help of the wall charge accumulated by the address discharge only in the discharge cells in which the above-described address discharge has occurred, thereby implementing an image.

Hereinafter, the driving of the plasma display panel 100 of the present invention will be described with reference to FIGS. 5 to 11.

The driving method for driving the plasma display panel according to the present invention may include various driving methods such as ADS driving and ALIS driving, and various factors such as the image quality and response speed of the plasma display panel may vary according to driving methods. Since this does not change the essential features of the present invention, an example of driving the plasma display panel of the present invention will be described below with reference to the ADS driving method.

First, in order to describe the driving of the plasma display panel 100 of the present invention, a brief description will be given of a reset discharge, an address discharge, and a sustain discharge.

In general, a discharge occurs in each of the discharge cells included in the plasma display panel for displaying an image for realizing an image. As a result, the state of the wall charges or the amount of charged particles are different between the discharge cells. Therefore, in the case where it is desired to control the discharge occurring in the discharge cells in a uniform manner, desired control is made between the discharge cells. It is difficult to hold. In order to prevent such a difficulty of the discharge control, by applying a high voltage of a predetermined level or more to all of the discharge cells at the same time to generate the discharge in all the discharge cells, by removing the wall charges existing in the discharge cells to equalize, discharge This leads to the same state of the charged particles in the cell, which is called a reset discharge.

Then, after the above-described reset discharge occurs, an address discharge occurs. In this case, the address discharge is a discharge for selecting a discharge cell in which an image is to be implemented in response to an external video signal. The discharge discharge is selected by an intersecting electrode, and discharge occurs in the discharge cell. It refers to an electric discharge that causes wall charges to accumulate by attaching charged particles to the inner side.

After the address discharge is generated, a sustain discharge that actually displays a predetermined gray scale to implement an image occurs. This sustain discharge causes a predetermined pulse voltage to be alternately applied to the electrodes extending in parallel to each other, thereby moving the wall charges accumulated during the above-described address discharges, and the wall charges collide with the discharge gas in the discharge cell to generate ultraviolet rays. The ultraviolet rays excite the phosphor to generate visible light, and the sustain discharge displays the gray scale of the actual screen.

Hereinafter, a signal applied to the X electrode, the Y electrode, and the intermediate electrode of the plasma display panel 100 of the present invention with reference to FIGS. 5 to 11 based on the above-described concepts of reset discharge, address discharge, and sustain discharge. The driving of the plasma display panel of the present invention will be described in relation to the structure of the discharge cell 126 with reference to an example of the waveform and the state of the wall charge.

The waveform shown in FIG. 5 shows a waveform of a signal applied to the electrode pair 114, the intermediate electrode 117, and the address electrode 122, more specifically, the potential, and as shown in FIG. 5. The discharge occurs while the rising lamp is applied to the intermediate electrode 117 between the times t1-t2 of the discharge, and then the erasing discharge occurs while the falling lamp is applied. Thus, a reset discharge occurs in the plasma display panel as a whole. The wall charge state of the whole field becomes uniform.

After the reset discharge is completed, a uniform amount of priming particles are generated and present in all of the discharge cells 126. Subsequently, an address pulse voltage VA, which is a predetermined data signal according to a control signal applied corresponding to an external video signal at a time t2-t3, is applied to the address electrode 122, and the address electrode in the discharge cell to emit light. When the potential difference between the address electrode and the intermediate electrode reaches the discharge start voltage while the negative scan voltage Vscan is applied to the intermediate electrode 117 that crosses the As described above, charged particles are accelerated between the intermediate electrode 117 and the address electrode 122 to generate an address discharge.

At this time, when the address discharge is completed, negative wall charges are accumulated on the side surface of the partition 130 on which the X electrode 113 is disposed, as shown in FIG. 7, and the front surface of the intermediate dielectric layer 128 and the Y Positive wall charges are accumulated on the side surfaces of the barrier ribs 130 on which the electrodes 112 are disposed.

At this time, after the address discharge occurs, the predetermined sustain discharge voltage Vs is alternately applied between the X electrode 113 and the Y electrode 112 at a time t3-t7 to discharge the wall charge accumulated in the discharge cell. The sustain discharge which accelerates within and displays a predetermined gray scale is generated.

At this time, the discharge cell in relation to the pulse potential applied to each of the intermediate electrode 117, the X electrode 113, and the Y electrode 112 during the sustain period of t3 to t7 of FIG. The variation of the distribution of the wall charges in 126 and the characteristic of the sustain discharge characteristic of the plasma display panel 100 of the present invention will be described.

First, referring to the period t3-t4, a predetermined sustain discharge voltage Vs having a potential higher than the scan voltage is applied to the intermediate electrode 117, and a ground potential (X) is applied to the X electrode 112 and the Y electrode 112. FIG. When VG) is applied, positive wall charges disposed on the front surface of the intermediate dielectric layer 128 are accelerated and moved toward the partition wall on which the X electrode 113 is disposed, as shown in FIG. 8. Meanwhile, the negative wall charges accumulated on the side surfaces of the barrier ribs on which the X electrode 113 is disposed are accelerated and moved toward the intermediate dielectric layer 128. The initial discharge occurs as shown in FIG. 9 by the movement of the wall charges.

At this time, the initial discharge increases the particles in the plasma state in the discharge cell 126, whereby the discharge can be generated only by the movement of the charged particles smaller than the initial stage.

Subsequently, when a positive sustain discharge voltage Vs is applied to the Y electrode 112 in the period t4 to t5 illustrated in FIG. 5, the side surface of the partition wall on which the Y electrode 112 is disposed as shown in FIG. 10. The positive wall charges accumulated in the X are accelerated toward the X electrode 113, and the negative charged particles or the negative wall charges existing on the X electrode side are accelerated toward the Y electrode 112.

At this time, since the initial discharge has already occurred in the discharge cell 126 and the plasma particles have increased, the discharge is easily caused by the movement of the positive wall charge moving from the Y electrode to the X electrode direction.

In particular, when only the electrode pairs are arranged in the barrier ribs to cause the opposite discharge, the distance between the barrier ribs is large, so that a high driving voltage must be formed between the electrode pairs to cause the initial discharge in the discharge cell. The price of the integrated circuit chip controlling the potential applied to the pair increases.

However, in the present invention, an initial discharge occurs between the intermediate electrode 117 and the X electrode 114, and the distance between the intermediate electrode 117 and the X electrode 113 is about half of the distance between the partition walls. Only the driving voltage is not high.

In addition, since the electrode pairs 114 are disposed to face each other, as described with reference to FIG. 1, the counter discharge is generated, the amount of discharge is greatly increased, the discharge itself is uniformly formed, and stable discharge is realized.

When the above-described discharge is completed, as shown in FIG. 11, positive wall charges are drawn on the side surfaces of the partition wall where the X electrode 113 is disposed in the discharge cell 126, and the Y electrode 112 is disposed. Negative wall charges are stored in the partition wall. Further, when the positive sustain discharge voltage Vs is applied to the X electrode 112 again at t5-t6 of FIG. 5, the positive wall charge and the negative wall charge face each other again between the X electrode and the Y electrode. Is accelerated in the direction to collide with the discharge gas, and discharge occurs again. At this time, the discharge is also already discharged at the time t4-t5, so that the plasma particles are increased in the discharge cell 126, so this discharge easily occurs.

Then, the sustain discharge voltage Vs is alternately applied to the X electrode and the Y electrode so that the sustain discharge occurs continuously, and the gray level of the image of the plasma display panel is displayed by the number of times the sustain discharge voltage is applied.

Hereinafter, the plasma display panel 200 according to the first modified example of the present invention will be described with reference to FIG. 12 based on different matters from the plasma display panel 100 of the present invention.

The plasma display panel 200 of the first modification of the present invention differs from that of the present invention in that the plasma display panel 100 of the present invention is provided with a partition wall 130 in which the plasma display panel 100 is arranged in a stripe form. The partition walls 230 provided in the plasma display panel 200 according to the first modification of the present invention are different.

More specifically, the partition wall 230 provided in the plasma display panel 200 according to the first modified example of the present invention extends in a direction crossing the horizontal partition wall 230b extending in one direction and the horizontal partition wall 230b. It is provided with a vertical partition wall 230a. When discharge occurs in the discharge cells 226 due to the arrangement of the vertical bulkheads 230a, movement of charged particles is blocked between the discharge cells 226, thereby preventing color mixing between the discharge cells, thereby improving image quality. Is improved.

On the other hand, the intermediate electrode 117 is preferably covered by the vertical partition (230a). In this case, when the plasma display panel 200 includes the intermediate dielectric layer 128 covering the intermediate electrode, the intermediate dielectric layer 128 is preferably covered by the vertical partition wall 230a.

On the other hand, the driving method and the functions of other components are the same as those of the present invention.

Hereinafter, with reference to FIG. 13, the plasma display panel 300 according to the second modified example of the present invention will be described focusing on differences from the plasma display panel 100 of the present invention.

The plasma display panel 300 of the second modification of the present invention differs from that of the present invention in that the X electrode 313 forming an electrode pair includes a plurality of electrodes 313a, 313b, and 313c, and the Y electrode ( 312 includes a plurality of electrodes 312a, 312b, and 312c.

In this case, the effects obtained by the X electrode and the Y electrode formed of a plurality of electrodes will be described. In general, since the larger the surface area of the electrode toward the interior of the discharge cell 326, that is, the thicker the electrode, the uniform electric field can be formed in the entire discharge cell. It is preferable that the thickness of an X electrode and a Y electrode is formed thick.

However, in the process of disposing the electrode in the partition wall, there are cases in which it is difficult to arrange the electrode with a thick thickness. In order to solve this problem, if a plurality of electrodes having the same function are arranged in the partition wall and the same potential is popular with the electrode, the same effect as that of the same thickness of the electrode can be generated.

That is, when a plurality of X electrodes 313 are disposed in the partition wall 130 as shown in FIG. 13, such an arrangement may induce an electric field in the discharge cell similarly to the thickening of the overall thickness of the X electrodes. The same applies to the Y electrode 312. Therefore, as a result, the uniformity of discharge can be improved and the amount of discharge can be increased.

The plasma display panel of the present invention achieves the following effects.

First, the X electrode and the Y electrode are disposed to face each other toward the inside of the discharge cell so that the discharge can take place in the form of counter discharge, thereby increasing the uniformity of the discharge and the amount of discharge.

Second, the aperture ratio is improved by eliminating the need for electrodes to be disposed on the front substrate of the plasma display panel, so that the visible light generated in the phosphor layer is directly connected to the front substrate without being limited by other components having low transmittance. By being able to pass through, the transmittance of visible light is increased, and as a result, the luminance is improved.

Third, the discharge can be started at a relatively short distance using the intermediate electrode, so that the opposite discharge can easily occur between the X electrode and the Y electrode, thereby lowering the level of the driving voltage for causing the discharge. . Accordingly, the cost of the integrated circuit chip that controls the electrical signal applied to the plasma display panel when the plasma display panel is driven is reduced, and as a result, the manufacturing cost of the plasma display panel is reduced.

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

Claims (25)

A transparent front substrate and a rear substrate disposed to face the front substrate; A partition wall disposed between the front substrate and the rear substrate to define discharge cells which are spaces for generating a discharge together with the front substrate and the rear substrate and formed of a dielectric; Sustain electrodes disposed in the partition wall; Intermediate electrodes fixed to the rear substrate and disposed between the sustain electrodes; Address electrodes arranged to intersect the sustain electrode and the intermediate electrode in the discharge cell; A phosphor layer disposed in the discharge cell; And And a discharge gas existing in the discharge cell. The method of claim 1, And the address electrode is disposed between the intermediate electrode and the back substrate. The method of claim 2, And a dielectric layer disposed between the intermediate electrode and the address electrode to cover the address electrode. The method of claim 3, wherein And the intermediate electrode is disposed in front of the dielectric layer. A transparent front substrate and a rear substrate disposed to face the front substrate; A partition wall disposed between the front substrate and the rear substrate to define discharge cells which are spaces for generating a discharge together with the front substrate and the rear substrate and formed of a dielectric; Sustain electrodes disposed in the partition wall; Address electrodes arranged to intersect the sustain electrodes in the discharge cell; A dielectric layer disposed to cover the address electrode; Intermediate electrodes disposed on a front surface of the dielectric layer; A phosphor layer disposed in the discharge cell; And And a discharge gas existing in the discharge cell. The method according to claim 1 or 5, And an intermediate dielectric layer disposed to cover the intermediate electrodes. The method of claim 6, And a concave portion is formed on the intermediate dielectric layer so that a space is formed in a portion of the discharge cell except for a portion covering the intermediate electrode. The method of claim 7, wherein And the concave portion is formed such that the intermediate dielectric layer has a corner having a predetermined angle. The method of claim 6, And the phosphor layer is disposed in a space defined by the barrier rib and the intermediate dielectric layer. The method according to claim 1 or 5, And the intermediate electrodes extend across the discharge cells in a direction parallel to a direction in which the sustain electrodes extend. The method according to claim 1 or 5, And the sustain electrodes are electrode pairs each of which extends over the plurality of discharge cells along the partition wall and includes X and Y electrodes facing each other inside the discharge cell. The method of claim 11, The X electrodes are plasma display panels, characterized in that the ends of each of the X electrodes are electrically common to each other, so that the electrical signals applied to each of the X electrodes are common to each other in response to an image signal applied from the outside. The method of claim 11, And the Y electrodes have a common electrical signal applied to each of the Y electrodes in response to an image signal applied from the outside because the ends of the Y electrodes are electrically common to each other. The method of claim 11, And the X electrode comprises at least one electrode. The method of claim 11, And the Y electrode comprises at least one electrode. The method according to claim 1 or 5, And the intermediate electrode includes at least one electrode. The method according to claim 1 or 5, The intermediate electrode is characterized in that the ends of the intermediate electrodes are electrically separated from each other, the electrical signals applied to each of the intermediate electrodes are separated from each other in response to an image signal applied from the outside. The method according to claim 1 or 5, The address electrode of the plasma display panel, characterized in that the ends of each of the address electrodes are electrically separated from each other and the electrical signals applied to each of the address electrodes are separated from each other in response to an image signal applied from the outside. The method according to claim 1 or 5, And the barrier rib is disposed in a stripe shape extending in one direction. The method according to claim 1 or 5, And the partition wall includes a horizontal partition wall extending in one direction and a vertical partition wall extending in a direction crossing the horizontal partition wall. The method of claim 20, And the intermediate electrode is covered by the vertical partition wall. The method according to claim 1 or 5, And the partition wall includes a second partition wall disposed behind the front substrate and a first partition wall disposed between the second partition wall and the rear substrate. The method of claim 22, And the sustain electrodes are disposed on the second partition walls. The method of claim 22, And the phosphor layer is disposed in a space defined by the first barrier rib and the back substrate. The method of claim 22, And the second partition wall is fixed to the front substrate, and the first partition wall is fixed to the rear substrate.

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