KR20010004316A - Plasma display panel capable of using positive column - Google Patents

Abstract

PURPOSE: A PDP(Plasma Display Panel) using positive column region is provided to use positive column region for fluorescent material for obtaining the high brightness and the high brightness efficiency. CONSTITUTION: A PDP(Plasma Display Panel) using positive column region comprises a front surface substrate(30) and a rear surface substrate(40) face to face. The front face substrate(30) includes the first dielectric layer(31), X,Y discharge sustain electrodes, the second dielectric layer(34), an insulating film pattern(35) and a protection film(36). The first dielectric layer(31) is formed on the front face substrate(30), has two slopes and is transparent. The discharge sustain electrodes consist of a bus electrode(33) and a transparent electrode(32) formed on the slope of the front surface substrate(30). The second dielectric layer(34) covers the bus electrode(33) and the transparent electrode(32). The insulating film pattern(35) is formed on the second dielectric layer(34) overlapped with the space between the discharge sustain electrodes and increases the discharge course. The protection film(36) covers the second dielectric layer(34) and the insulating film pattern(35).

Description

Plasma display panel which can utilize positive light area {PLASMA DISPLAY PANEL CAPABLE OF USING POSITIVE COLUMN}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly to a plasma display panel which can use a positive light column region for light emission in order to obtain high brightness and high brightness efficiency.

Plasma Display Panel (PDP), which is one of the flat panel display devices, is composed of discharge cells that can be discharged independently. Reproduce. Since PDP can be manufactured to a panel thickness of 1 cm or less, the thickness and weight of the PDP can be significantly reduced compared to CRTs, and PDP has a merit of securing a wide viewing angle compared to a liquid crystal display (LCD).

The color PDP is a device that displays characters and shapes by using visible light mainly emitted from ultraviolet rays generated by glow discharge to stimulate photoluminescence phosphors. Current color PDPs come in two types: direct current and alternating current. AC type has better brightness and luminance efficiency than DC type.

1A is a perspective view showing the structure of an AC PDP according to the prior art, and FIG. 1B is a cross-sectional view taken along line AA ′ of FIG. 1A. As shown in FIGS. 1A and 1B, a PDP has a pair of a front plate and a back plate. On the front substrate 10, discharge sustaining electrodes consisting of a transparent electrode 11 and a metal bus electrode 12 are formed. The dielectric layer 13 is coated over the entire surface, and the protective film 14 is formed of MgO having a high secondary electron discharge coefficient thereon. The back substrate 20 includes an address electrode 21 perpendicular to the electrodes 11 and 12 of the front substrate 10 and a dielectric layer 22 covering the dielectric substrate 22. Partition walls 23 are formed to prevent talk, and phosphors 24 are applied between the partition walls. The pair of substrates including the front substrate 10 and the rear substrate 20 are bonded to face each other, and a discharge gas is enclosed therebetween.

In general, when a glow discharge is generated between two electrodes, the discharge area can be largely divided into five areas: a cathode arm part, a cathode glow, a Faraday arm part, an anode glow (positive column), and an anode arm part. At this time, if the two electrodes are reduced, the anode glow, the Faraday arm portion, and the cathode glow disappear in order, and the discharge disappears at a certain distance. Typically, the amount of ultraviolet rays generated during discharge is more generated in the anode glow than the cathode glow, and the conventional plasma display panel mainly uses the cathode glow because it discharges in a small discharge gap.

Accordingly, the luminance efficiency is still relatively low to commercialize a PDP and use it as a home TV screen. Therefore, in order to be commercialized, it is necessary to further improve the luminance and luminance efficiency of the panel.

The present invention devised to meet the above needs is an object of the present invention to provide a plasma display panel that can use a positive light region to emit light in order to obtain high brightness and high brightness efficiency.

1A is a perspective view showing the structure of an AC PDP according to the prior art;

FIG. 1B is a cross-sectional view along the line AA ′ of FIG. 1A;

Figure 2a is a perspective view showing the structure of the AC-type PDP according to an embodiment of the present invention,

FIG. 2B is a cross sectional view along line AA 'of FIG. 2A;

* Explanation of reference numerals for the main parts of the drawings

30: front substrate 32: transparent electrode

33: bus electrodes 31, 34, 42: dielectric layer

36: protective film 40: back substrate

41: address electrode 43: partition wall

44: phosphor

According to an aspect of the present invention, there is provided a plasma display panel including a front substrate and a back substrate facing each other, comprising: a first dielectric layer formed on the front substrate and having an inclined surface; A discharge sustain electrode comprising a transparent electrode and a bus electrode formed on the inclined surface of the first dielectric layer; A second dielectric layer covering the discharge sustain electrode; A plasma display panel including a passivation layer formed on the second dielectric layer is provided.

The present invention also provides a plasma display panel further including at least one insulating film pattern for increasing a discharge path on the second dielectric layer between the discharge sustain electrodes.

The present invention is characterized by increasing the discharge path by forming two electrodes of the front substrate to be inclined in order to increase the discharge path, and by forming a rod-shaped insulating film pattern between the two electrodes. In addition, in order to reduce the cross-sectional area of the transparent electrode in the portion perpendicular to the discharge path, it is another feature to form the transparent electrode in a plurality of patterns in the discharge cell space.

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

FIG. 2A is a perspective view showing the structure of an AC PDP according to an embodiment of the present invention, and FIG. 2B is a cross-sectional view taken along a line A-A 'of FIG. 2A, and shows dielectric properties similar to that of the front substrate on the front substrate 30. A first dielectric layer 31 having two inclined surfaces, a transparent electrode 32 pattern formed on each inclined surface of the first dielectric layer 31, and an X and Y discharge sustaining electrode composed of a bus electrode 33, and the transparent electrode 32. An insulating layer pattern 35 and a second dielectric layer 34 formed on the second dielectric layer 34 covering the bus electrode 33 and the second dielectric layer 34 overlapping the space between the discharge sustaining electrodes and increasing the discharge path. ) And a front plate including a protective layer 36 covering the insulating layer pattern 35, an address electrode 41 formed on the back substrate 40, a third dielectric layer 42 and a third dielectric layer 42 covering the address electrode. And a phosphor formed on the partition wall 43 and the partition wall 43 and the third dielectric layer. It shows with the faceplate.

FIG. 2A shows an embodiment of the invention in which the cross-section of the first dielectric layer 31 perpendicular to the front substrate 30 is an isosceles triangle. Meanwhile, the inclination angle θ of the inclined surface of the first dielectric layer 31 is determined according to the height of the discharge cell gap.

The PDP forming method having the structure as shown in Figs. 2A and 2B will be described in more detail.

Compounds such as ITO, SnO _2, etc. are formed to form a first dielectric layer 31 having two inclined surfaces on the front substrate 30 and X and Y discharge sustain electrodes on the two inclined surfaces of the first dielectric layer 31. The transparent electrode 32 is formed of a semiconductor, and the bus electrode 33 pattern is formed of a low resistance metal such as Al, Cr / Cu / Cr, Ag, Au, or the like.

Next, a second dielectric layer 34 is formed on the front substrate 30 on which the discharge sustain electrodes are formed, and an insulating film pattern having a width equal to the distance between the sustain sustain electrodes on the second dielectric layer 34 between the discharge sustain electrodes. (35) is formed. When the front substrate 30 and the rear substrate 40 are bonded to each other, the insulating film pattern 35 is positioned between the adjacent partition walls 43 so that the partition 43 and the insulating film 35 patterns do not overlap.

Next, the passivation layer 36 is formed on the insulating layer pattern 35 and the second dielectric layer 34.

On the back substrate 40, Ag, Au, Cr / Cu / Cr, Al, and the like are sputtered or evaporated, and the address electrode 41 is formed by performing a photolithography process or a screen printing method. The third dielectric layer 42 is coated on the entire surface of the back substrate 40 on which address electrode formation is completed.

Subsequently, a partition wall (not shown) is formed on the fourth dielectric layer 42 between the address electrodes 41 to define a discharge cell region, and the phosphor 44 on the fourth dielectric layer 42 between the partition wall and the partition wall is formed. ) Is applied.

Next, the discharge sustain electrodes and the address electrodes formed on the front substrate 30 and the rear substrate 40 are bonded to each other so as to vertically intersect with each other, and the discharge between the front substrate 30 and the rear substrate 40 is performed. The discharge gas is enclosed in the cell.

As described above, the discharge sustaining electrode is formed on two inclined surfaces, and an insulating film pattern is formed on the dielectric layer between the discharge sustaining electrodes to increase the discharge path, thereby making it possible to use the positive light column region for light emission.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

According to the present invention as described above, the use of the positive light column region for light emission increases the luminance and luminance efficiency of the PDP and enables early commercialization of the PDP.

Claims (6)

In a plasma display panel comprising a front substrate and a back substrate facing each other, A first dielectric layer formed on the front substrate and having an inclined surface and transparent; A discharge sustain electrode comprising a transparent electrode and a bus electrode formed on the inclined surface of the first dielectric layer; A second dielectric layer covering the discharge sustain electrode; A protective film formed on the second dielectric layer Plasma display panel comprising a. The method of claim 1, And at least one insulating film pattern for increasing a discharge path on the second dielectric layer between the discharge sustain electrodes. The method according to claim 1 or 2, And the first dielectric layer is formed of two inclined surfaces in contact with each other, and the discharge sustain electrode is formed on the two inclined surfaces. The method of claim 3, wherein And a cross section of the first dielectric layer perpendicular to the front substrate is an isosceles triangle. The method of claim 4, wherein An address electrode formed on the rear substrate and orthogonal to the discharge sustain electrode; A third dielectric layer covering the address electrode; Barrier ribs formed on the third dielectric layer; Further comprising a phosphor formed on the third dielectric layer and the barrier rib, And the insulating film pattern is positioned between the adjacent partition walls. The method of claim 5, And the transparent electrode has at least one pattern in a discharge cell space.