KR100626023B1 - Plasma display panel - Google Patents

Abstract

The present invention not only provides a means for increasing the amount of discharge by increasing the plasma density in the discharge cell, thereby increasing the brightness, but also by reducing the reactive power to optimize the power consumption to increase the power consumption efficiency and reduce the manufacturing cost An object of the present invention is to provide a plasma display panel, and in order to achieve the above object, the present invention is disposed between the front substrate and the rear substrate, which are disposed to face each other and whose edges are sealed, and disposed between the front substrate and the rear substrate, Barrier ribs formed of a metal defining a discharge cell which is a space for causing discharge, a phosphor layer disposed in the discharge cells, electrode pairs disposed between the phosphor layer and the back substrate to cross the discharge cells; Intersect each other in the electrode pair and the discharge cell and extend to cross the discharge cells; The present invention provides a plasma display panel including address electrodes disposed between the phosphor layer and the front substrate, and a discharge gas existing in the discharge cell.

Description

 Plasma display panel {Plasma display panel}

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

2 is a cross-sectional view of the plasma display panel according to the first embodiment of the present invention taken along the line II-II;

3A to 3B are cross-sectional views illustrating a process of forming a back substrate and a partition wall of a plasma display panel according to a first embodiment of the present invention, and showing a process of disposing a photoresist separation layer on an electroplating disc;

3C is a cross-sectional view illustrating a step of disposing a photoresist layer on the photoresist separation layer;

3D is a cross-sectional view showing a step of disposing a predetermined pattern on the photoresist layer,

3E is a cross-sectional view for explaining a step of removing a portion of the photoresist layer and the photoresist separation layer by exposing and developing ultraviolet rays to the photoresist layer,

3F is a cross-sectional view illustrating the growth of a metal layer in a portion where a photoresist and a photoresist separation layer are removed by a metal plating method;

3G is a cross-sectional view for explaining a partition and a rear substrate formed by growing a metal layer by a metal plating method;

3H is a cross-sectional view for explaining the removal of the metal plating disc and the photoresist separation layer,

FIG. 3I is a cross-sectional view showing a portion of residue left after removing a photoresist layer that does not form a partition by a development and exposure process,

3J is a cross-sectional view showing the removal of debris using a plasma etching process;

4 is an exploded perspective view showing the plasma display panel of the second embodiment of the present invention;

5 is an exploded perspective view showing the plasma display panel of the third embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

100, 300, 400: plasma display panel.

110, 310, 410: front panel

120, 320, 420: rear panel

126: electrode pair 127: insulating layer

130: partition 121: rear substrate

112: address electrode

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to increase the amount of discharge by accelerating charged particles in a discharge cell to increase plasma density, to reduce reactive power, to increase luminance, to increase power consumption efficiency, and to reduce manufacturing cost. The present invention relates to the provision of means for achieving the effect.

BACKGROUND ART A conventional plasma display panel is a display device that implements a predetermined image by exciting phosphors by ultraviolet rays generated by gas discharge, and has been spotlighted as a next-generation thin display device because a large screen can be configured with high resolution.

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.

The simple principle of image realization of such a plasma display panel is as follows. First, an electric field is formed in the discharge cell to accelerate the charged particles, thereby increasing the amount of charged particles having a predetermined kinetic energy or more. At this time, the accelerated charged particles collide with the discharge gas present in the discharge cell to generate a plasma, thereby generating a discharge, resulting in the visible light.

In this case, in order to increase the luminous efficiency of the plasma display panel, it is necessary to increase the probability that the accelerated charged particles have kinetic energy of a predetermined kinetic energy and exist in the discharge cell. As a result, the discharge amount is increased, thereby increasing the luminous efficiency. However, in the conventional plasma display panel, the charged particles are not sufficiently accelerated in the electric field in the discharge cell, and the luminous efficiency thereof is very low compared to other electric devices.

As a result, in order to increase the luminous efficiency of such a low-efficiency plasma display panel, it is very important to find a means that can sufficiently accelerate the charged particles participating in the discharge. When solving this problem, it is possible to increase the luminance of the plasma display panel and increase the luminous efficiency, and at the same time to manufacture a low-cost plasma display panel.

The present invention solves the above problems, by increasing the plasma density in the discharge cell to increase the amount of discharge, thereby providing a means for increasing the brightness, by reducing the reactive power to optimize the power consumption efficiency It is an object of the present invention to provide a plasma display panel which increases the cost and reduces the manufacturing cost.

In order to achieve the above object, the present invention is disposed to face each other, the front substrate and the rear substrate is the edge is sealed, and disposed between the front substrate and the rear substrate, and defines the discharge cells which are spaces for generating discharge Barrier ribs formed of a metal, a phosphor layer disposed in the discharge cells, electrode pairs disposed between the phosphor layer and the rear substrate to cross the discharge cells, and the electrode pair and the discharge cell. And a plurality of address electrodes extending across the discharge cells and disposed between the phosphor layer and the front substrate and discharge gas existing in the discharge cells.

In this case, when the back substrate of the plasma display panel is additionally formed of metal, acceleration of the above-described charged particles may be more smoothly performed, and the process may be simplified.

On the other hand, it is preferable that an insulator layer is disposed between the rear substrate and the electrode pair to prevent the electrode pair from energizing. In the plasma display panel, it is preferable that the phosphor layer is disposed in a space defined by the barrier ribs and the front substrate to increase the life of the phosphor layer. In order to increase the front transmittance of visible light, the address electrode is preferably formed of a transparent electrode.

On the other hand, according to another embodiment of the present invention, the front substrate and the rear substrate, which are disposed to face each other and have edges sealed, are disposed between the front substrate and the rear substrate, and define discharge cells, which are spaces for generating discharge, and are made of metal. Barrier ribs formed, a phosphor layer disposed in the discharge cells, electrode pairs disposed between the phosphor layer and the front substrate to cross the discharge cells, and the electrode pair and the discharge cell intersect each other. And an address electrode extending between the discharge cells and disposed between the phosphor layer and the back substrate, and a discharge gas existing in the discharge cell.

In this case, also in the plasma display panel, it is preferable that the back substrate is made of metal to accelerate the charged particles by the cavity effect. In order to prevent the address electrodes from energizing each other, it is preferable to arrange an insulator layer between the rear substrate and the address electrodes. On the other hand, the phosphor layer is preferably disposed in the space defined by the back substrate and the partition wall in order to increase the life of the phosphor. On the other hand, the electrode pair is preferably formed of a transparent electrode to increase the transmittance of visible light.

Meanwhile, in the above-described plasma display panel, it may be preferable in the manufacturing process that the back substrate and the partition wall are integrally formed, and a vertical talk wall partitioning the discharge cells in a matrix form is provided to cross talk between the discharge cells. It may be desirable to improve the quality of the plasma display panel.

In addition, it may be preferable to further protect the electrode pair by further comprising a first dielectric layer disposed to cover the electrode pair, and further comprising a second dielectric layer disposed to cover the address electrode to protect the address electrode. It may be more desirable. In addition, all of the plasma display panels may further include a protective film disposed in the discharge cells, thereby increasing the amount of secondary electrons to increase the amount of discharge and increase the life of the plasma display panel.

Hereinafter, a plasma display panel according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 2.

The plasma display panel 100 includes a front panel 110 and a rear panel 120. In this case, the front panel 110 has a front substrate 111 having a thickness of approximately 2.8 mm made of soda glass and the like, and the rear panel 120 has a rear substrate 121. At this time, the front substrate is preferably formed of a material such as transparent soda glass so as to be excited by the ultraviolet light generated by the discharge to transmit visible light generated in the phosphor layer described later, but the back substrate is a visible light generated in the phosphor layer Since it is not located on the optical path that is a traveling path, it is not necessarily transparent and can be formed of glass or the like, but can also be formed of an opaque material such as metal or plastic.

Meanwhile, the back substrate is made of metal in order to smoothly accelerate the charged particles in the discharge cell 140 to be described later, thereby increasing plasma density to increase luminous efficiency and to reduce reactive power generated due to the presence of the back substrate. It is more preferable to form. In addition, the plasma display panel is disposed between the front substrate and the rear substrate, and defines the discharge cells 140, which are spaces for discharging, to facilitate the acceleration of the charged particles in the discharge cells and increase the plasma density to increase luminous efficacy. In addition, the barrier rib 130 is formed of metal to increase reactive power and reduce reactive power due to the presence of the barrier rib.

On the other hand, it is preferable that the barrier rib and the back substrate are integrally formed of a metal for convenience of the manufacturing process of the plasma display panel. When at least one of the rear substrate and the partition wall is formed of metal, the reactive power consumed through the rear substrate and the partition wall may be reduced to optimize power consumption of the plasma display panel. Hereinafter, the reason why it is preferable that the barrier rib and the back substrate are formed of metal and the manufacturing process thereof will be described in detail later.

The rear panel 120 includes a rear substrate 121 and electrode pairs 126 disposed between the phosphor layer 116 and the front substrate so as to cross the discharge cells 140. In addition, when the back substrate is formed of a metal, an insulating layer 127 is preferably disposed between the back substrate and the electrode pair to prevent conduction between the electrode pairs 126. On the other hand, the electrode pair is not necessarily disposed on the front surface of the back substrate or the front surface of the insulating layer 127, a layer for performing a separate function, such as a reflective layer for reflecting visible light on the front surface of the insulator layer Since the electrode pairs may be disposed on the front surface of the layer, there is no limitation on the arrangement position of the electrode pairs, and the phosphor layer 116 and the back substrate 111 to be described later to cross the discharge cells. It is enough to be placed in between.

On the other hand, the electrode pairs may be composed of electrode pairs 126 having an X electrode 125 and a Y electrode 124, it is included between the X electrode and the Y electrode and the interval between the X electrode and the Y electrode In order to increase the amount of discharge and increase the amount of discharge, a floating electrode (not shown) having no potential applied to the sustain discharge generated according to the sustain discharge potential applied alternately between the electrode pairs may occur at a low potential. It may be further disposed between the X electrode and the Y electrode, and an intermediate electrode (not shown) to which a potential is applied is disposed between the X electrode and the Y electrode to maintain at a low potential while increasing the distance between the X electrode and the Y electrode. Discharge may also occur. Thus, as shown in FIG. 1, the scope of the present invention is not limited by the addition of such electrodes, even if electrodes other than the electrode pair 126 including the X electrode 125 and the Y electrode 124 are added.

On the other hand, since the electrode pair is disposed between the back substrate and the phosphor layer as described above, since the electrode pair is not located on the optical path, the choice of the material is wide, thus the electrical conductivity is high and the price is high. The electrode pair may be variously formed of relatively inexpensive materials such as aluminum, copper, and chromium. In addition, the electrode pairs have a variety of shapes, as well as a variety of materials. Therefore, the electrode pairs can be freely deformed to suit the characteristics of the discharge.

In addition, the rear panel may include a first dielectric layer 123 disposed in front of the rear substrate, more specifically, in front of the insulating layer to cover the electrode pairs 126.

On the other hand, since the first dielectric layer is not located on the optical path of visible light, it is not necessarily transparent, but it is preferable that the first dielectric layer is disposed as a white dielectric in order to increase the reflectance of visible light and increase the ratio of visible light moving forward. In addition, the first dielectric layer 123 is not limited to the arrangement position on the front surface of the insulating layer for the same reason as the arrangement position of the electrode pairs, and the first dielectric layer may be disposed in front of the rear substrate.

On the other hand, it is preferable that the rear panel further includes a protective film 129 disposed to cover the rear dielectric layer. In this case, the protective layer 129 serves to protect the electrode layer covered by the rear dielectric layer and the rear dielectric layer, and at the same time, discharges secondary electrons when the charged particles collide due to discharge, thereby promoting discharge. . In this case, MgO or the like is generally used as a material of the protective film, but since the protective film is coated on the rear surface of the rear dielectric layer, light transmittance is not a problem, and thus, carbon nanotubes (CNT) having excellent electron emission characteristics may be used. MgO and the like having particles may be used. In addition, the process of arranging the protective film will be described later.

On the other hand, the front panel 110 crosses the front substrate 111, the electrode pairs 126 and the discharge cell 140, and extends to cross the discharge cells to extend the phosphor layer 116 and Address electrodes 112 disposed between the front substrate are further provided. In this case, the address electrodes 112 are formed by applying a paste containing the address electrode material to the back surface of the front substrate through a screen printing method and then drying and baking, or by including a photosensitive photoresist in the paste to provide a photosensitive device. By etching using the photolithography method to form an address electrode.

Meanwhile, the address electrodes 112 are not necessarily disposed on the rear surface of the front substrate, and a near infrared blocking film (not shown) is disposed on the rear surface of the front substrate to block near infrared rays generated during discharge, or an electromagnetic shielding filter layer. When the address electrodes are disposed, the address electrodes may be disposed on the rear surface of the near-infrared blocking film or the electromagnetic wave shielding filter layer. Thus, the address electrodes may be formed on the front substrate 111 and the phosphor layer 116 to be described later. It is enough to be placed in between.

On the other hand, since the address electrode is located on a light path in which the visible light generated by the discharge generated in the discharge cell 140 is directed toward the front, it is preferable that the address electrode is formed of a transparent electrode to increase the transmittance of the visible light. . In this case, in order to increase the visible light transmittance of the address electrode, in general, the address electrode is formed using indium tin oxide (ITO). The ITO has a high light transmittance but a high resistance. Therefore, when a potential is applied to the address electrode formed of ITO, the size of the electric field formed inside the discharge cells across the address electrode may vary due to the voltage drop due to the high resistance of the ITO material. This may result in an imbalance of address discharge, which may degrade image quality. To solve this problem, the front panel is formed of a metallic conductive material and is made of three layers of silver or chromium-copper-chromium electrically connected to the address electrode. Bus electrodes (not shown) may be further provided.

The front panel 120 may further include a second dielectric layer 115 disposed between the front substrate 111 and the phosphor layer 116 to be described later to cover the address electrode 112. Of course, since the phosphor layer described later can function as a dielectric layer even if the second dielectric layer is not disposed, there is no problem in driving the plasma display panel of the present invention, but the charged particles accelerated to the address electrode when address discharge occurs. Since the direct collision may damage the address electrode, the second dielectric layer is preferably disposed to cover the address electrode in order to increase the lifetime of the plasma display panel.

On the other hand, the front panel includes a phosphor layer disposed in the discharge cell 140. In this case, the phosphor layer is preferably disposed in a space defined by the barrier rib 130 and the front substrate 111 in order to prevent deterioration due to ion sputtering in the electrode pair.

Meanwhile, the phosphor layer 116 may include red, green, and blue light emitting phosphor layers in order to enable the plasma display panel to realize a color image. The red, green, and blue light emitting phosphor layers may be provided. The unit pixels can be formed by separately disposing the discharge cells. The phosphor layer is dried by applying a phosphor paste mixed with a phosphor, a solvent, and a binder of any one of red, green, and blue phosphors to the back surface of the second dielectric layer 115 by screen printing. And a calcination step. At this time, the red light emitting phosphor may include (Y, Gd) BO ₃ : Eu ³⁺ , the green light emitting phosphor may be Zn ² Si 04: Mn ²⁺ , and the blue light emitting phosphor may be BaMgAl ₁₀ O ₁₇ : Eu ²⁺ . .

On the other hand, if the plasma display panel is used in a place where there is no visible light incident from the outside, such as a dark room, only visible light generated inside the discharge cell of the plasma display panel will proceed to the front of the plasma display panel will be recognized by the user's vision, Under normal circumstances, visible light incident from the outside toward the front of the plasma display panel is reflected and perceived by the user's vision together with the visible light generated inside the discharge cell of the plasma display panel. At this time, the visible light incident to and reflected from the front of the plasma display panel lowers the clearness ratio of the plasma display panel, making it difficult to distinguish colors, thereby degrading the color and degrading the image quality. To prevent this, a black stripe (not shown) made of a dark-based material may be disposed between the partition 130 and the front dielectric layer 115.

On the other hand, the discharge cell is filled with a discharge gas consisting of any one of neon (Ne), helium (He), or argon (Ar) including xenon (Xe) gas, or a mixed gas of two or more thereof. At this time, since the pressure of the discharge gas is in a vacuum state (0.5 atm), the pressure according to the vacuum of the discharge gas acts as a force for pressing the front substrate and the back substrate, which is supported by the partition wall. On the other hand, the front panel and the rear panel is coupled to the edge is sealed by a coupling member such as a frit (flit).

Hereinafter, the driving of the plasma display panel 100 according to the first embodiment of the present invention will be briefly described with reference to FIGS. 1 to 2, and the effects that occur when the barrier ribs and the back substrate are formed of metal will be described. Shall be.

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 image quality and response speed of the plasma display panel may vary depending on the driving method. Since the features of the present invention are not changed, an example of driving the plasma display panel of the present invention will be described below with reference to ADS driving.

In general, a discharge occurs in each of the discharge cells included in the plasma display panel for an image display 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 140, and therefore, the desired control between the discharge cells is desired when the discharges occurring in the discharge cells are to be controlled in a uniform manner. It happens that it is difficult to make. In order to prevent such a difficulty of the discharge control, by applying a high voltage of a predetermined level or more to 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 cells Induced to be the same state of the charged particles in this is called a reset discharge. Such a reset discharge is generally performed by applying a high potential lamp potential to all the Y electrodes 124 and applying a ground potential to all the address electrodes 112 to discharge the entire discharge cells.

Then, after the above-described reset discharge occurs, an address discharge occurs. In this case, the address discharge is generally a discharge cell specified by one of the electrode pairs 126 and the address electrode 112 that cross each other in an arbitrary discharge cell in order to select the discharge cell 140 in which the image is to be implemented. A discharge is generated by applying a pulse voltage to the crossing electrode pairs to emit light, and charged particles generated by the discharge are accumulated on the inner surface of the discharge cell 140 to form wall charges. This address discharge selects the discharge cell by accumulating wall charges on the inner surface of the discharge cell as described above, and enables the sustain discharge described later with the aid of the accumulated wall charges. In view of the wall charges and sustain discharges accumulated in the address discharge as described above, only when the discharge discharges are appropriately generated in the desired discharge cell, the sustain discharge occurs in the desired discharge cell during the sustain discharge, and the gray scale is displayed accordingly. Since the image is embodied, it can be seen that the stable address discharge is a very important part for improving the image quality of the plasma display panel.

In this case, since the Y electrode 124 and the X electrode 125 are disposed to intersect the address electrode 112, such an address discharge is performed by the Y electrode 124 and the address electrode 112 or the X electrode 125 and Although it may be caused by the address electrode 112, it is assumed here that an address discharge occurs between the Y electrode and the address electrode. When a predetermined pulse voltage is applied between the address electrode 112 and the Y electrode 124 from an external power source, the discharge cell 140 to emit light is selected by crossing the Y electrode and the address electrode, and the selected discharge cell is selected. Is discharged while the potential difference applied to the Y electrode and the address electrode reaches the firing voltage, thereby accumulating wall charges on the front, rear, or side surfaces of the discharge cell.

On the other hand, a sustain discharge occurs after the above-described address discharge occurs to implement an image. In this case, in the discharge cell 140 selected by the address discharge, a potential is alternately applied to the electrode pairs 126 a predetermined number of times to display a specific gray level, so that predetermined visible light is emitted from the discharge cell. Substantially, the discharge in the step of implementing an image on the panel is called sustain discharge. At this time, when a potential is applied to a plurality of electrode pairs arranged in all the discharge cells alternately to form a voltage lower than the discharge start voltage, wall charges are accumulated only in the discharge cells in which the address discharge has occurred. As the potential difference formed by the pairs is added to exceed the discharge start voltage, sustain discharge occurs only in the discharge cells in which the address discharge has occurred, thereby generating visible light. At this time, assume that positive wall charges are accumulated on the Y electrode 124 and negative wall charges are accumulated on the X electrode 125 by the address discharge. At this time, when a predetermined amount of pulse potential is applied to the Y electrode 124 and a ground potential is applied to the X electrode 125, the positive wall charge accumulated in the Y electrode is applied to the voltage between the Y electrode and the X electrode. It is accelerated by the electric field formed by the movement toward the X electrode. On the other hand, the negative wall charges accumulated in the X electrode are accelerated toward the Y electrode by the electric field and move. At this time, when the accelerated positive wall charge and the negative wall charge have kinetic energy of sufficient magnitude, the discharge gas atoms are excited while colliding with the discharge gas in the discharge cell 140. Thus, the excited gas discharges its energy level to a high energy level, and again generates an ultraviolet ray having a predetermined wavelength as the energy level falls to a low energy level. At this time, the discharge gas containing Xe generates ultraviolet rays having a relatively short wavelength in the vicinity of 147 nm and 173 nm, and these ultraviolet rays excite the phosphor to generate visible light having a predetermined wavelength. Then, when the ground potential is applied to the Y electrode 124 again, and a positive potential is applied to the X electrode 125, the wall charge is accelerated and moved again, and the wall charge repeats the collision with the discharge gas. Generates visible light. Then, if the process is repeated repeatedly, visible light generated in the discharge cells in which the sustain discharge is generated displays a predetermined gray scale to implement an image.

In this case, in order to increase the luminous efficiency of the plasma display panel, the following conclusions can be obtained from the above description. As described above, when the charged particles are accelerated in the discharge cell to have a predetermined kinetic energy, the charged particles are generated by colliding with the discharge cell to excite the discharge gas. Thus, the amount of visible light generated in the discharge cell is generated in the discharge cell. It depends on how much the quantity of charged particle which has kinetic energy more than predetermined kinetic energy can be increased. When the amount of visible light is increased by using the same power, the luminous efficiency of the plasma display panel is increased as a result.

At this time, the plasma display panel 100 of the present invention provides the following means to significantly increase the kinetic energy of the charged particles in the discharge cell compared to the conventional plasma display panel. Also in the plasma display panel of the present invention, charged particles are accelerated by an electric field formed by a potential applied to an electrode pair in a discharge cell. At this time, since the partition wall 130 constituting the discharge cell is made of metal, a negative electric potential of the metal partition wall is generated by an electric field formed in the discharge cell, thereby causing the charged particles to rush toward the partition wall. Then, the charged particles are accelerated in the opposite direction to the direction in which the charged particles rush by the film potential formed in the partition wall. Thereafter, the charged particles are accelerated toward other partitions formed of metal and consequently vibrating. This effect is commonly referred to as the cavity effect. Due to this cavitation effect, the charged particles are accelerated to have about 10 times more kinetic energy than the conventional one. Due to the increase in the kinetic energy of the charged particles, the probability that the charged particles collide with the discharge gas to excite the discharge gas increases, thereby increasing the luminance of the plasma display panel at the same driving potential, thereby greatly increasing the luminous efficiency. . In addition, since the luminance is increased at the same driving potential, the potential to be applied to the electrode pair and the address electrode is reduced as a result. And this reduction in potential allows the integrated circuit chip controlling these electrodes to be driven at low potential. This directly leads to a reduction in the manufacturing cost of the plasma display panel.

In addition, since the charged particles are accelerated toward the center by the above-mentioned cavities effect, the probability of causing a discharge in the center of the discharge cell is increased, and the discharge is concentrated in the center. Such discharge concentration makes it possible to efficiently use the space of the discharge cell, thereby increasing the amount of discharge, thereby bringing the above-described effect of increasing the luminous efficiency, reducing the manufacturing cost.

On the other hand, when the barrier rib and the rear substrate are formed of metal, reactive power consumed by the barrier rib and the rear substrate can be reduced. That is, when a time-varying potential is applied to the electrode pair, the rear substrate and the partition wall undergo the same electrical phenomenon as the dielectric inserted into the capacitor. Therefore, a displacement current flows through the rear substrate and the partition wall due to the time-varying potential applied to the electrode pair. At this time, since the discharge occurs in the discharge cell, the displacement current flowing toward the partition and the back substrate becomes a current which does not contribute to the discharge. In this case, the displacement current flowing through the barrier ribs and the rear substrate may be converted into thermal energy in the barrier ribs and the rear substrate, thereby changing the phase of the driving power, thereby reducing the proportion of the effective power utilized to cause discharge in the entire power. Therefore, in order to optimize power consumption, it is necessary to reduce the displacement current flowing through the partition walls and the rear substrate.

At this time, the displacement current flowing through the dielectric is proportional to the capacitance C of the capacitor as shown in the equation I = C dv / dt. At this time, the C is proportional to the magnitude of the dielectric constant of the dielectric as can be seen in C = ε A / d. In this case, when the barrier ribs and the rear substrate are formed of metal, the relative dielectric constant of the barrier ribs and the rear substrate becomes smaller than that of the Si component, so that the capacitance C of the barrier ribs and the rear substrate may be reduced. As a result, displacement current flowing through the back substrate and the partition wall can be reduced, and as a result, reactive power can be reduced. As a result, the reduction of the reactive power can increase the proportion of the active power in the same driving power, thereby increasing the power consumption efficiency of the plasma display panel.

Hereinafter, with reference to FIGS. 3A to 3J, a method of reducing a process cost by integrally fabricating a partition wall and a back substrate while forming a metal with a metal will be described.

As shown in FIG. 3a, an electrode plating disc 210 is prepared. At this time, the electrode plating disc is to be connected to the power source to form the barrier material and the rear substrate by the electroplating process in the future to be attached to the metal material. The electrode plating disc is preferably formed of a metal material, it is preferably formed of nickel (Ni) or the like.

Thereafter, as shown in FIG. 3B, the photoresist separation layer 220 is disposed on the front surface of the electrode plating disc 210. The photoresist separation layer may be formed of amorphous silicon with a thickness of approximately 0.1 μm.

Thereafter, as shown in FIG. 3C, a photoresist layer 230 having a predetermined thickness is disposed on the entire surface of the dielectric resistor separation layer 220. As shown in FIG. 3D, a pattern 235 according to the shape of the partition wall is disposed on the front surface of the photoresist layer 230. As shown in FIG. 3E, when the UV light is exposed, tissue bonds of the photoresist are broken, and when this is developed, the photoresist layer where the pattern 235 is not disposed is etched.

Thereafter, as shown in FIG. 3F, a metal plate formed of copper or the like is connected to the positive electrode of the power source, and the electroplating disc 210 is connected to the negative electrode of the power source and disposed in the aqueous solution. Subsequently, when the potential difference is formed through the power source, ions of the metal plate are adhered to the electroplating disc, and after a predetermined time, the partition wall 130 and the rear substrate are formed from the metal plate disc as shown in FIG. 3g. do.

Subsequently, as shown in FIG. 3H, when the electroplating disc is removed, the photoresist layer existing between the back substrate 121, the partition wall 130, and the partition wall remains. Thereafter, as shown in FIG. 3I, the photoresist may be heated in an aqueous solution and subjected to plasma etching to remove the photoresist layer. At this time, the residue 230a of the photoresist layer may remain between the partition walls, which may be plasma-etched again to obtain the partition walls 130 and the rear substrate 121 formed as a clean body as shown in FIG. 3H. have.

Hereinafter, with reference to FIG. 4, the plasma display panel 300, which is the second embodiment of the present invention, will be described with an example focusing on different matters from the first embodiment of the present invention. The plasma display panel 300 of the second embodiment of the present invention differs from the first embodiment of the present invention in that the electrode pair 326 is disposed between the phosphor layer 316 and the front substrate 111, and the address electrode ( 312 is an intersection between the electrode pair and the discharge cell 340, and extends to cross the discharge cells are disposed between the phosphor layer 316 and the back substrate. In this case, since the address electrode is not on the optical path of visible light, it is not necessarily formed as a transparent electrode. On the other hand, since the electrode pairs are disposed on the optical path of visible light, the electrode pairs are preferably formed of a transparent electrode such as ITO, and have bus electrodes 324a and 325a to prevent voltage drop due to excessive resistance of ITO. It is desirable to. In addition, the electrode pair is preferably covered by the first dielectric layer 315 for the same reason as in the first embodiment of the present invention, and the address electrode is also preferably covered by the second dielectric layer 323. . On the other hand, as in the first embodiment of the present invention, the partition wall 130 is formed of a metal, it is preferable that the back substrate is formed of a metal and formed integrally with the partition wall in order to increase the process and luminous efficiency.

Hereinafter, the plasma display panel 400 according to the third embodiment of the present invention will be described with reference to FIG. 5 based on different points from the first embodiment of the present invention. The plasma display panel 400 of the third embodiment of the present invention differs from that of the first embodiment of the present invention in that the vertical partition wall 450 partitions the discharge cells 440 in a matrix form. When the partition wall is formed in a stripe shape as in the first embodiment of the present invention, since the physical partitions of the discharge cells are not clear, cross talk in which mixed particles occur due to the intersection of charged particles between adjacent discharge cells occurs. This may cause a deterioration in image quality. In order to solve this problem, after forming the back substrate 121 and the partition wall 130 integrally with a metal, the vertical partition wall 450 may be arranged by a screen printing method to partition the discharge cells in a matrix form. .

According to the present invention, the charged particles in the discharge cell are sufficiently accelerated using the cavity effect, thereby increasing the amount of plasma generated through collision with the discharge gas in the discharge cell, thereby increasing the amount of discharge, thereby increasing the brightness of the plasma display panel.

In addition, the present invention increases the luminous efficiency by increasing the luminance of the plasma display panel at the same driving potential, thereby increasing the power consumption efficiency of the plasma display panel.

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In addition, the present invention reduces the power consumption of the plasma display panel by reducing the reactive power caused by the presence of the back substrate by forming the back substrate with a metal.

In addition, the present invention enables the formation of the barrier rib and the back substrate at the same time, thereby simplifying the process of the plasma display panel and reducing the manufacturing cost.

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 (15)

A front substrate and a rear substrate disposed to face each other and having edges sealed thereto; A partition wall disposed between the front substrate and the rear substrate and defining a discharge cell which is a space for generating a discharge and formed of a metal; A phosphor layer disposed in the discharge cells; Electrode pairs disposed between the phosphor layer and the rear substrate to cross the discharge cells; An insulator layer disposed between the rear substrate and the electrode pair; Address electrodes intersecting each other in the electrode pair and the discharge cell and extending to cross the discharge cells and disposed between the phosphor layer and the front substrate; And A discharge gas existing in the discharge cell; And the back substrate is formed integrally with the barrier rib and is made of metal. delete delete The method of claim 1, And the phosphor layer is disposed in a space defined by the barrier ribs and the front substrate. The method of claim 1, And the address electrode is formed of a transparent electrode. A front substrate and a rear substrate disposed to face each other and having edges sealed thereto; A partition wall disposed between the front substrate and the rear substrate and defining a discharge cell which is a space for generating a discharge and formed of a metal; A phosphor layer disposed in the discharge cells; Electrode pairs disposed between the phosphor layer and the front substrate to cross the discharge cells; Address electrodes intersecting each other in the electrode pair and the discharge cell and extending between the discharge cells and disposed between the phosphor layer and the rear substrate; An insulator layer disposed between the rear substrate and the address electrode; And A discharge gas existing in the discharge cell; And the back substrate is formed integrally with the barrier rib and is made of metal. delete delete The method of claim 6, And the phosphor layer is disposed in a space defined by the back substrate and the partition wall. The method of claim 6, And the electrode pairs are formed of transparent electrodes. delete The method of claim 6, And a vertical barrier rib partitioning the discharge cells in a matrix form. The method of claim 6, And a first dielectric layer disposed to cover the electrode pairs. The method of claim 6, And a second dielectric layer disposed to cover the address electrode. The method of claim 6, And a protective film disposed in the discharge cell.

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