KR19990012544U - 3-electrode surface discharge plasma display panel - Google Patents

Abstract

In the present invention, a front substrate and a rear substrate are opposed to each other with a predetermined space therebetween, and a plurality of first and second sustain electrodes are alternately arranged one by one on a surface of the front substrate facing the rear substrate, A plurality of barrier ribs are arranged between the substrate and the rear substrate so as to be orthogonal to the first and second sustaining electrodes, and at least one stripe type groove is formed parallel to the barrier ribs on the front substrate between the barrier ribs And the plurality of first and second sustain electrodes are arranged on the groove forming surface of the front substrate so as to be orthogonal to the grooves, and a wall charge is generated during the discharge on the first and second sustain electrodes And a protective film that emits secondary electrons are formed in order, and the first and second sustain electrodes, the dielectric layer, The present invention relates to a three-electrode surface discharge plasma display panel in which a plurality of electrodes are formed in a concavoconvex shape, wherein first and second sustain electrodes of each cell are formed in a concavo-convex shape to enlarge the electrode area compared with the prior art, Since the secondary electron emission area is also increased, a larger amount of secondary electrons than in the prior art is discharged into the discharge space during the discharge of each cell, so that the amount of charged particles in the discharge space increases. As a result, The amount of excitation and the amount of visible light are all increased, and the luminance of each cell is increased.

Description

3-electrode surface discharge plasma display panel

The present invention relates to a plasma display panel (hereinafter referred to as a PDP), and more particularly to a three-electrode surface discharge PDP having three electrodes for discharging and maintaining a discharge for each cell.

Since Hyundai is called as an information society, the importance of display is increasing with the development and spread of information processing system, and the kinds are increasingly diversified.

CRT (Cathode Ray Tube), which has been used most as a display in the past, has various problems such as large size, high operating voltage, and display distortion, Recently, research and development of various flat panel displays having a matrix structure have been progressing actively.

Among the above flat panel displays, PDPs (Plasma Display Panels) are widely known as next-generation large-screen flat displays. The PDP has a large screen and a small thickness and is applied to a wall-hanging television, a home theater display, various monitors, and the like.

Also, the PDP is divided into an AC (alternating current) type and a DC (direct current) type depending on the type of driving voltage. That is, the AC type PDP is driven by a sinusoidal AC voltage or a pulse voltage, and the DC type PDP is driven by a DC voltage.

1 is a cross-sectional view of one of the conventional three-electrode surface discharge PDPs of FIG. 2A, FIG. 2B is a cross- Sectional views taken along the line A-A 'shown in Fig. 2A.

The conventional three-electrode surface discharge PDP includes N first sustain electrodes Y _{1 to} Y _N and N second sustain electrodes X _{1 to} X N arranged alternately in parallel one by one as shown in FIG. _N) and the first sustain electrodes (Y ₁ ~Y _N) and the second sustain electrodes (X ₁ ~X _N) and a predetermined address electrodes arranged orthogonally to the space M across the (a ₁ ~A _M ).

That is, a cell is formed at each intersection of the N first and second sustain electrodes Y _{1 to} Y _N and X _{1 to} X _N and the M address electrodes A _{1 to} A _M , Of M × N cells.

The structure of each cell of the above-described three-electrode surface discharge PDP will be described with reference to the cells in the i-th row and the j-th column shown in Figs. 2A and 2B.

A first dielectric layer 12 is formed on one surface of the rear substrate 11 and a jth address electrode A _j is formed on the front substrate 11 to restrict a discharge current on the address electrode A _j and facilitate the generation of wall charges. this is formed, the address electrode (a _j) the first and second partition walls (13a, 13b) for preventing inter-color mixing on both sides and ensure the discharge space are formed in parallel with the address electrode (a _j) each, and , And a phosphor 14 is coated on the first dielectric layer 12 and a part of the first and second barrier ribs 13a and 13b.

An i-th first sustain electrode Y _i and an i-th second sustain electrode Y _{i are} formed on a surface of the front substrate 15 opposed to the rear substrate 11 with a predetermined space therebetween, The sustaining electrodes X _i are arranged in parallel to each other so as to be orthogonal to the address electrodes A _j and the discharge current at the time of discharge is limited on the first and second sustaining electrodes Y _i and X _i , And a second dielectric layer 16 formed on the second dielectric layer 16 for facilitating the formation of the second dielectric layer 16. The first and second sustain electrodes Y _i and X _i and the second dielectric layer 16 are formed on the second dielectric layer 16 by sputtering, A magnesium oxide (MgO) protective film 17 for protecting the dielectric layer 16 and releasing secondary electrons is formed, and a discharge gas is injected into the discharge space.

The basic driving principle of each cell of the above-configured three-electrode surface discharge PDP is as follows.

First, the first sustain electrode (Y _i) in the + voltage to the address electrode (A _j) a - is applied at the same time the voltage first, an address discharge between the first sustain electrodes (Y _i) and the address electrode (A _j) up first holding A + wall charge is generated on the surface of the magnesium oxide protective film 17 on the electrode Y _i - the wall charge is formed on the surface of the phosphor 14 on the address electrode A _j , respectively.

Then, the first sustain electrodes (Y _i) on-voltage to the second holding when the + voltage to the electrode (X _i) is at the same time the first sustain electrode (Y _i) or the sustain discharge between the second sustain electrodes (X _i) And a sustain discharge is generated in the discharge space, an electric field is generated to accelerate the trace electrons in the discharge gas. The accelerated electrons collide with the neutral particles of the discharge gas to ionize the neutral particles, and the neutralization of the neutral particles Are also accelerated by the electric field to participate in the collision with the neutral particles to ionize the neutral particles at an accelerated rate.

At this time, the MgO protective film 17 emits secondary electrons into the discharge space to increase the amount of charged particles in the discharge space.

According to the above-mentioned principle, the discharge gas is turned into a plasma state to generate vacuum ultraviolet rays. The vacuum ultraviolet rays excite the phosphors 14 to generate visible light, thereby displaying cells located in the i-th row and the j-th column.

When the sustain discharge is completed, in the first sustain electrode (Y _i) above + the wall charges, the second sustain electrodes (X _i) on-the + voltage, so wall charges are generated each after the first sustain electrode (Y _i) When a negative voltage is applied to the second sustain electrode X _i simultaneously, a sustain discharge occurs again between the first sustain electrode Y _i and the second sustain electrode X _i , and the light emission of the cell located in the i-th row and the j- maintain.

That is, when the process of applying the voltage of the same polarity as that of the wall charges generated immediately before the first sustain electrode Y _i and the second sustain electrode X _i is repeatedly performed, The light emission of the cell is continuously maintained.

On the other hand, a general discharge phenomenon has several luminescence characteristics depending on the distance between electrodes. Among the above, a portion having the highest luminous efficiency is a positive column, and a gap between the electrodes is required to be considerably long in order to generate the positive luminous flux In a PDP having a gap of several hundreds of micrometers between electrodes, a negative glow occurring around the cathode is used.

Therefore, when a discharge voltage is applied between the first sustain electrode Y _i and the second sustain electrode X _i of each cell, the electrons in the discharge space are accelerated, Many physical reactions such as ionization, excitation, metastable ion generation of neutral particles occur due to collision with the discharge gas neutral particles around the applied electrode, resulting in a vacuum ultraviolet ray of 147 nm.

However, since the conventional three-electrode surface discharge PDP uses a negative glow having a narrow discharge gap between the first and second sustain electrodes of each cell, So that it is difficult to put it into practical use as compared with a CRT widely known as an image display means.

In order to solve the above problems, the present invention is characterized in that the first and second sustaining electrodes of each cell are formed in a concavo-convex shape so that the electrode area is wider than in the prior art, And the brightness of each cell is increased by increasing the amount of the secondary electrons.

1 is an overall electrode structure of a conventional three-electrode surface discharge plasma display panel (hereinafter, referred to as a three-electrode surface discharge PDP)

2A is a cross-sectional view of one cell of a conventional three-electrode surface discharge PDP,

FIG. 2B is a cross-sectional view taken along the line A-A 'shown in FIG. 2A,

3 is an overall electrode structure of a three-electrode surface discharge PDP according to an embodiment of the present invention,

4A is a cross-sectional view of one cell of a three-electrode surface discharge PDP according to one embodiment of the present invention,

4B is a cross-sectional view taken along the line A-A 'shown in FIG. 4A,

4C is a sectional view taken along the line B-B 'shown in FIG. 4A.

DESCRIPTION OF THE REFERENCE NUMERALS

51: back substrate 55: front substrate

52, 56: Dielectric layer 57: magnesium oxide protective film

Y ₁ 'to Y _N ': first sustain electrodes X ₁ 'to X _N ': second sustain electrodes

In order to achieve the above object, a three-electrode surface discharge PDP according to the present invention includes a front substrate and a rear substrate facing each other with a predetermined space therebetween, and a plurality of first And a plurality of barrier ribs arranged between the front substrate and the rear substrate so as to be orthogonal to the first and second sustain electrodes. Wherein at least one stripe type groove is formed in parallel with the barrier ribs on the front substrate between the barrier ribs and the plurality of first and second sustain electrodes are formed on the groove- Grooves are formed on the first and second sustain electrodes so as to be perpendicular to the first and second sustain electrodes, The entire protective layer and for emitting secondary electrons formed in turn characterized in that the first and second sustain electrodes and the dielectric layer and the protective film are both formed of concave-convex shape.

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

FIG. 4A is a cross-sectional view of one of the three-electrode surface discharge PDPs according to an embodiment of the present invention, and FIG. 4B is a cross- 4A is a sectional view taken along the line A-A ', and FIG. 4C is a sectional view taken along the line B-B' shown in FIG. 4A, respectively.

As shown in FIG. 3, the three-electrode surface discharge PDP according to one embodiment of the present invention includes N first sustain electrodes Y ₁ 'to Y _N ' arranged alternately one by one and N second sustain electrodes Y ₁ ' electrodes (X ₁ '~X _N') and the first sustain electrodes (Y ₁ '~Y _N') and the second sustain electrodes (X ₁ '~X _N') and the M number of the address array to be perpendicular to And electrodes A ₁ 'to A _M '.

That is, at every intersection of the _N first sustain electrodes Y ₁ 'to Y _N ' and the second sustain electrodes X ₁ 'to X _N ' and the M address electrodes A ₁ 'to A _M ' Cells are formed and the entire screen is constituted by M × N cells in the form of a matrix.

The structure of each cell of the above-described three-electrode surface discharge PDP will be described with reference to the cells of the i-th row and the j-th column shown in Figs. 4A, 4B and 4C.

First, a first dielectric layer (A _j ') is formed on one surface of the rear substrate 51, and a j-th address electrode A _j ' is formed on the rear substrate 51 to restrict a discharge current on the address electrode A _j ' 52) parallel to the "first and second partition walls (53a, 53b) wherein the address electrode (a _j to prevent inter-cell color mixture on either side of) and secure a discharge space"), and is formed on the address electrode (a _j And a phosphor 54 is coated on the first dielectric layer 52 and a part of the first and second barrier ribs 53a and 53b.

The front substrate 55 is opposed to the rear substrate 51 with a predetermined space therebetween and two stripe grooves are formed on a surface of the front substrate 55 facing the rear substrate 51 The first and second sustain electrodes Y _i 'and Y _i ' parallel to the first and second barrier ribs 53a and 53b and parallel to the groove forming surface of the front substrate 55, X _i ') are formed so as to be orthogonal to the grooves, and a second dielectric layer (X _i ') is formed on the first and second sustain electrodes (Y _i ', X _i ') to restrict the discharge current upon discharge, The first and second sustain electrodes Y _i 'and X _i ' and the second dielectric layer 56 are protected from sputtering occurring upon discharge on the second dielectric layer 56, And a magnesium oxide protective film 57 for discharging secondary electrons are formed in the discharge space, It is injected.

The first and second sustain electrodes Y _i 'and X _i ', the second dielectric layer 56, and the magnesium oxide protective layer 57 are all formed in a concavo-convex shape by grooves formed in the front substrate 55. Therefore, the areas of the first and second sustain electrodes Y _i 'and X _i ', the second dielectric layer 56, and the magnesium oxide protective film 57 are wider than those of the prior art.

The basic driving principle of each cell of the three-electrode surface discharge PDP according to one embodiment of the present invention configured as described above is as follows.

First, the first sustain electrode (Y _i ') a + voltage address electrode (A _j to') a - in which an address discharge between when applied at the same time the voltage first sustain electrode (Y _i ') and the address electrode (A _j') And + wall charge is generated on the surface of the magnesium oxide protective film 57 on the first sustain electrode Y _i '- the wall charge is formed on the surface of the phosphor 54 on the address electrode A _j ', respectively.

Then, the first sustain electrode (Y _i ') on-voltage of the second sustain electrode (X _i') when a + voltage is applied at the same time the first sustain electrode (Y _i ') and the second sustain electrode (X _i' When the sustain discharge occurs within the discharge space, an electric field is generated to accelerate the minute electrons in the discharge gas. The accelerated electrons collide with the neutral particles of the discharge gas to ionize the neutral particles, Electrons ionized by the ionization of the neutral particles are also accelerated by the electric field to participate in the collision with the neutral particles to ionize the neutral particles at an accelerated rate.

At this time, the magnesium oxide protective film 57 emits secondary electrons into the discharge space to increase the amount of charged particles in the discharge space as described in the related art. However, in an embodiment of the present invention, the areas of the first and second sustain electrodes Y _i 'and X _i ' are larger than those of the prior art, and accordingly, the secondary electron emission area of the magnesium oxide protective film 57 The amount of secondary electrons is released into the discharge space in the magnesium oxide protective film 57 at the time of the sustain discharge.

Therefore, in the sustain discharge, more charged particles collide with the neutral particles of the discharge gas and ionize within the discharge space.

According to the above-mentioned principle, the discharge gas is brought into a plasma state to generate vacuum ultraviolet rays. The vacuum ultraviolet rays excite the phosphors 54 to generate visible light, thereby displaying cells located in the i-th row and the j-th column.

In addition, a larger amount of vacuum ultraviolet ray is generated in the discharge space than in the prior art to increase the amount of excitation of the phosphor 54. As a result, the visible light amount increases, and the luminance of the cells located in the i- do.

On the other hand, when the sustain discharge is completed, the first sustain electrode (Y _i ') above + the wall charges, the second sustain electrodes (X _i') above - since the wall charges are generated each after the first sustain electrode (Y _i ') to the + voltage second sustain electrodes (X _i ') a - is applied at the same time the voltage first sustain electrode (Y _i' is again a sustain discharge between) and the second sustain electrodes (X _i ') up the i-th row and the j The emission of the cell located in the ith row is maintained.

That is, when a process of applying a voltage having the same polarity as that of the wall charges generated just before to the first sustain electrode Y _i 'and the second sustain electrode X _i ' is repeatedly performed as in the related art, And the light emission of the cell located in the jth column is maintained.

As described above, in the three-electrode surface discharge PDP according to the present invention, the first and second sustain electrodes of each cell are formed in a concavo-convex shape, the electrode area is wider than in the prior art, and the secondary electron emission area The amount of secondary electrons emitted from each cell is discharged to the interior of the discharge space to increase the amount of charged particles in the discharge space. As a result, the amount of vacuum ultraviolet rays generated by each cell, the amount of excited phosphor, And the luminance of each cell is increased.

Claims (1)

Wherein a plurality of first and second sustain electrodes are alternately arranged one by one on a surface of the front substrate opposite to the rear substrate, the front substrate and the rear substrate facing each other with a predetermined space therebetween, Wherein a plurality of barrier ribs are arranged between the rear substrate and the first and second sustaining electrodes so as to be orthogonal to each other, At least one or more stripe type grooves are formed in parallel with the barrier ribs on the front substrate between the barrier ribs, The plurality of first and second sustain electrodes are arranged on the groove forming surface of the front substrate so as to be orthogonal to the grooves, A dielectric layer for facilitating the generation of wall charges during the discharge on the first and second sustain electrodes and a protective layer for emitting the secondary electron are formed in order so that the first and second sustain electrodes, Wherein the first electrode and the second electrode are formed in a concave shape.