KR950003097B1 - Plasma display panel - Google Patents

Abstract

The panel includes a glass substrate (6), a W electrodes (1) parallel to and spaced apart from the substrate (6), first and second dielectric layers (7a,7b) formed on the substrate (6) and the electrodes (1), X and Y electrodes (2a,3a) mutually spaced apart to maintain plasma discharges at the interface of the layers (7a,7b), electrodes (2a,2b) connected to the X and Y electrodes (2,3) to form the electric fields, thin magnetic films formed on the layer (7b) to form magnetic fields, a third dielectric layer (8) firmed on the layer (7b) and thin magnetic films, a discharging gas filling space (9) formed on the layer (8) and a cover glass (10) formed on the space (9), thereby forming the thin magnetic films between pixels to improve the resolution.

Description

Plasma display panel

1 is a plan view of a plasma display panel structure according to the present invention.

2 is a cross-sectional view taken along the line a-a 'of FIG.

Fig. 3a shows the cation in the magnetic field and the Larmor trajectory of the electron.

Fig. 3 (b) is a spiral motion trajectory diagram of charged particles.

Fig. 3 (c) is a distribution diagram of the magnetic field and electrons of one pixel.

* Explanation of symbols for main parts of the drawings

1 writing electrode 2, 3 sustain (X, Y) electrode

4: thin film magnet 5: discharge part

6: glass substrates 7a, 7b: first and second dielectric layers

8: third dielectric layer 9: discharge gas gas space

10: cover glass

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (hereinafter referred to as "PDP"), and more particularly to an improved structure of a PDP for increasing the brightness, resolution, and driving margin of a PDP using surface discharge.

In general, an electrode of a PDP is composed of an X electrode and a Y electrode, which are sustain electrodes to which a constant AC voltage is always applied, and a writing electrode (hereinafter, referred to as a “W electrode”), which is an addressing electrode.

No discharge occurs in any pixel due to the sustain voltages applied to the X and Y electrodes, which are sustain electrodes. However, when a specific pixel is selected by the W electrode and a voltage higher than the discharge start voltage is applied, the pixel is initially weak. Since the charged particles exist in a specific pixel where the discharge occurs and then the initial discharge occurs, the plasma start discharge continues between the pixels only by the voltage applied to the X and Y electrodes, which are sustain electrodes.

However, since the charged particles generated by the discharge affect the discharge start voltage of the adjacent pixel, the driving margin of the entire PDP is reduced.

Conventionally, in order to solve such a problem, a method of providing a partition between adjacent pixels or installing a floating electrode to prevent the discharge between adjacent pixels has been proposed. However, in the former case, the phenomenon of miss discharge in which the discharge is diffused in the adjacent pixel could be prevented, but it was not effective in improving the brightness.

Accordingly, an object of the present invention is to provide a PDP structure with increased brightness, resolution, and driving margin.

The present invention for achieving the above object is a plasma display panel displayed by a plasma radiation discharge, a glass substrate made of an insulating material, and a plurality of linear W arranged in parallel spaced apart from each other on the surface of the glass substrate Spaced at a predetermined distance to sustain plasma discharge at an interface between an electrode, first and second dielectric layers of a dielectric material formed on the glass substrate and the W electrode, and an interface between the first and second dielectric layers. A plurality of electrodes for forming an electric field connected to the X, Y electrodes, respectively, and formed on top of the second low-k dielectric layer and spaced apart to form a magnetic field in the same or opposite direction as the electric field at the separation distance of the electrode A plurality of thin film magnetic bodies, a third dielectric layer formed on the plurality of thin film magnetic means and the second dielectric layer, and a plastic layer on the third dielectric layer. And town gas discharge the gas filled discharge gas area, characterized in that it consists of a cover glass on the gas discharge gas areas.

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

1 is a plan view of a PDP structure according to the present invention, in which reference numeral 1 is a long W electrode as shown, and reference numerals 2 and 3 are alternating currents formed so that a plasma discharge does not occur due to a long distance from each other. X and Y electrodes, which are sustain electrodes to which voltage is applied (hereinafter, the sustain electrode 2 is referred to as an X electrode, and the sustain electrode 3 is referred to as a Y electrode), and electrodes 2a and 3a are the X electrodes ( 2) and the Y electrode 3 and spaced apart to form a plasma discharge region, and the reference numeral 4 is a thin film magnet (or thin film magnetic body) formed parallel to the W electrode 1 spaced by the discharge region. , Reference numeral 5 denotes one discharge region, which represents a discharge region.

FIG. 2 is a cross-sectional view of the PDP of FIG. 1 taken along the a-a 'direction, and the same reference numerals as in FIG.

In the PDP manufacturing process of the present invention, an aluminum thin film having a thickness of 2 μm is deposited on a glass substrate 6 such as Corning 0317 by an e-beam deposition method. Thereafter, the W electrode 1 is formed by photolithography and wet etching the aluminum thin film deposited on the glass substrate 6 by the above method. On the W electrode 1 thus formed, an SiO 2 thin film, which is the first dielectric layer 7a, is formed to have a thickness of 4 μm by an electron beam deposition method.

Aluminum is again deposited on the formed SiO 2 thin film to have a thickness of 2 μm, and photolithography and wet etching are performed to form sustain electrodes X electrodes 2, Y electrodes 3, and electrodes 2a and 3a. Then, again, the SiO 2 thin film as the second dielectric layer 7b is formed to a thickness of 2 μm.

Next, a magnetic material such as Nd2Fe14B is deposited to have a thickness of 10 μm using an electron beam evaporation method, and the thin film magnet 4 is formed by photolithography and plasma deposition on the deposited magnetic material Nd2Fe14B. At this time, the thin film magnet 4 is magnetized using a strong magnetic field from outside, and MgO having a large secondary electron emission coefficient is deposited on the third dielectric layer 8 by about 500 kV using an electron beam deposition method.

In the above, an embodiment using a magnetic material of Nd 2 Fe 14 B is shown, but a magnetic material such as Sm 2 CO 17 or CoCr may be used. Afterwards, the discharge gas gas space 9 having a thickness of 100 μm was held as a spacer to cover the gas used for discharging, and the cover glass 10 was covered and the sides except for the gas opening were sealed. After filling the inside of the discharge gas gas space (9) Ne (Ne) + 0.1% xenon (Xe) gas to a pressure of 200 torr (Torr) to complete the gas filling.

When a sustain alternating voltage is applied between the X electrode 2 and the Y electrode 3, which are the sustain electrodes of the PDP of the present invention formed as described above, and a discharge start voltage is applied to the selected W electrode of the W electrode 1, the pixel A discharge occurs in the cation and electrons to move and move in a positive to negative direction between the electrodes 2a and 3a connected to the X electrode 2 and the Y electrode 3, respectively. A magnetic field is formed in the thin film magnet 4 adjacent to the electrodes 2a and 3a at the same time as the electric field is formed from the N pole direction to the S pole direction.

Therefore, the cations and electrons between the pixels move, but the cations and electrons moving in the same or opposite directions of the electric and magnetic fields have no effect because they move in the same or opposite directions of the electric field, respectively. The ions and electrons having the component affect the discharge.

는 하기식 1과 같은 힘을 갖고 리머(Larmor) 반경으로 자장내에서 제3(a)도와 같은 회전운동을 하므로 양이온과 전자는 각각 반대방향으로 회전 분리되고, 제 3(b) 도와 같이 나선 형태를 그리며 각각의 서스테인 적극인 X전극(2)과 Y전극(3)의 방향으로 이끌리게 된다.That is, the vertical velocity component of the charged particle perpendicular to the magnetic field

Has the same force as in Equation 1 below, and rotates in the magnetic field at the radius of the reamer (Larmor) as the third (a), so the cations and the electrons are rotated and separated in opposite directions, respectively. And are drawn in the direction of the X electrode 2 and the Y electrode 3 which are the respective positive electrodes.

Therefore, the recombination on the discharge space between the pixels is reduced and the ionization and excitation are increased to increase the brightness. When the lamor radius is r _L , the following Equation 2 is expressed.

Referring to the symbols shown in the equation 1 and the equation 2 is as follows.

: 하전입자가 받는 힘, m : 하전입자의 질량,

: 하전입자의 가속도, q : 하전입자의 전하량,

: 전장,

: 하전입자의 속도,

: 자장, r_L: 라머(Larmor) 반경, V₂: 하전입자의 자장에 대한 수직 속도성분, B_G: 가우스 단위의 자속밀도, C : 빛의 속도이다.

: Force of charged particles, m: mass of charged particles,

: Acceleration of charged particles, q: charge amount of charged particles,

: Battlefield,

= Velocity of charged particles,

: Magnetic field, r _L : Larmor radius, V ₂ : Vertical velocity component with respect to the magnetic field of charged particles, B _G : Magnetic flux density in Gaussian unit, C: Velocity of light.

FIG. 3 (c) shows the formation of electric and magnetic fields centering on the discharge portion 5 of FIG. 1, and is enlarged using the same reference numeral as in FIG. In the drawing of FIG. 3 (c), reference numeral 1 denotes the W electrode, 2 denotes the X electrode, 3 denotes the Y electrode, 4 denotes the thin film magnet, and 13 denotes the N pole of the thin film magnet 4. And (14) are the S poles of the thin film magnet 4, (11) are lines indicating the direction of the magnetic field, and (12) are lines indicating the direction of the electric field.

Accordingly, as shown in FIG. 3 (c), the direction of the magnetic field is the same as that of the arrow 11 by the thin film magnet 4, and if the direction of the electric field is the arrow 12 which is indicated by the dotted line, FIG. The electrons moving in a direction perpendicular to the plane will make a spiral motion in the direction of the electric field 12.

Therefore, since the path of the motion trajectory of the electron is long, the discharge gas collides with the gas in the sealed discharge gas gas space 9, thereby increasing the amount of charged particles and increasing the resolution of the plasma discharge light. In addition, the particles moving upward and downward perpendicular to the direction of the arrow in FIG. 3 (c) also move in the direction of electrons (for cations) or in the opposite direction (for electrons) while performing a helical motion, as described above. The resolution is improved. In addition, the plasma discharge portion 5 is also focused by the influence of the magnetic field due to the arrangement of the thin film magnet 4.

As described above, the present invention forms a thin film magnet between the pixel and the magnetic field is formed by the thin film magnet, so that the charged particles are attracted to each electrode by the helical movement by the magnetic field to increase the ionization and excitation Brightness increases with decreasing recombination with. In addition, the present invention removes the miss discharge between adjacent pixels because the charged particles in the pixel are limited to the inside of the water by the magnetic field formed above, and other pixels adjacent to the discharged pixel do not receive some charged particles from the discharge pixel. In addition to increasing margins, resolution also increases.

Claims (3)

In a plasma display panel displayed by a plasma gas discharge, a glass substrate 6 made of an insulating material, and a plurality of linear W electrodes 1 arranged on the surface of the glass substrate 6 spaced apart from each other in parallel to each other; The interface between the first and second dielectric layers 7a and 7b of a dielectric material formed on the glass substrate 6 and the W electrode 1 and the first and second dielectric layers 7a and 7b. A plurality of electrodes (2a) (3a) connected to the X and Y electrodes (2) (3) spaced at a predetermined distance so as to sustain the plasma discharge at a predetermined distance to form an electric field, and the second dielectric layer A plurality of thin film magnetic body means formed on the upper portion 7b and spaced apart from each other so as to form a magnetic field in the same or opposite direction as the electric field at a distance between the X and Y electrodes 2a and 3a, and the second dielectric layer 7b, a third dielectric layer 8 formed on the thin film magnetic body means, and an upper portion of the third dielectric layer 8; Plasma discharge gas a gas sealed discharge gas space (9), a plasma display panel, characterized in that consists of a cover glass 10 on the discharge gas space (9). 2. The plasma display panel of claim 1, wherein the thin film magnetic body means is any one selected from Nd2Fe14B or Sm2CO17 or CoCr. 3. The plasma display panel according to claim 2, wherein the thin film magnetic body means is magnetized in a predetermined direction at the top of each W electrode (1) in parallel with the W electrode (1) and spaced apart by a plasma discharge portion.

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