KR20060061453A - Plasma display panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel in which the structure of the dielectric layer is improved to lower the discharge start voltage and improve the discharge efficiency during plasma discharge using a positive column region. Has the effect of improving.

The present invention is a scan electrode and a sustain electrode is formed on the front substrate, a dielectric layer is formed on the scan electrode and the sustain electrode, the rear substrate and the address electrode arranged to intersect the scan electrode and the sustain electrode and the discharge on the rear substrate In the plasma display panel including a partition wall partitioning the cell, the dielectric layer is characterized in that it comprises a depression recessed to a predetermined depth between the scan electrode and the sustain electrode spaced a predetermined distance apart.

Plasma display panel, positive column area, discharge distance, dielectric layer, depression

Description

Plasma Display Panel

1 is a perspective view schematically showing the structure of a conventional plasma display panel.

2 is a view showing that a dielectric layer of a conventional plasma display panel is formed.

3 is a view showing a dielectric layer formed in a plasma display panel according to the present invention;

4 is a view for explaining a discharge region between electrodes.

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having an improved structure of a dielectric layer to lower discharge start voltage and improve discharge efficiency during plasma discharge using a positive column region.

In general, a plasma display panel is a partition wall formed between a front substrate and a rear substrate to form a unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and An inert gas containing the same main discharge gas and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 is a perspective view showing the structure of a general plasma display panel.

As shown in FIG. 1, a plasma display panel includes a front substrate in which a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 are formed on a front glass 101, which is a display surface on which an image is displayed. The rear substrate 110 having the plurality of address electrodes 113 arranged to intersect the plurality of sustain electrode pairs on the back glass 111 forming the back surface 100 and the rear surface is coupled in parallel with a predetermined distance therebetween. .

The front substrate 100 is made of a scan electrode 102 and a sustain electrode 103, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the bus electrode b are included in pairs. The scan electrode 102 and the sustain electrode 103 are covered by one or more upper dielectric layers 104 that limit the discharge current and insulate the electrode pairs, and to facilitate the discharge conditions on the upper dielectric layer 104 top surface. A protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

The rear substrate 110 is arranged in such a manner that a plurality of discharge spaces, that is, barrier ribs 112 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 for performing address discharge to generate vacuum ultraviolet rays are disposed in parallel with the partition wall 112. On the upper side of the rear substrate 110, R, G, and B phosphors 114 which emit visible light for image display during address discharge are coated. A lower dielectric layer 115 is formed between the address electrode 113 and the phosphor 114 to protect the address electrode 113.

2 is a view showing a dielectric layer formed in a conventional plasma display panel. As shown in FIG. 2, a dielectric layer 204a is formed on the scan electrode 202 and the sustain electrode 203. The dielectric layer 204a is made of a differential thickness and includes, for example, a depression 220 recessed to a predetermined depth at the center of the discharge cell. The structure of this dielectric layer is called a differential dielectric layer. The differential dielectric layer 204 is typically recessed 220 recessed between the scan electrode 202 and the sustain electrode 203 to limit the discharge current between the scan electrode 202 and the sustain electrode 203. It is usually included.

Meanwhile, in order to achieve high efficiency of the plasma display panel, a positive column area is used during discharge. Since the area of the discharge cell must be large in order to generate a discharge using the positive light column region, the distance d ₁ between the scan electrode 202 and the sustain electrode 203 is increased.

However, in the structure of the conventional dielectric layer of FIG. 2, since the width w ₁ of the recess 220 is only about 70 μm, it is difficult to cause discharge in the positive light region, resulting in high discharge start voltage and low discharge efficiency. .

In order to solve the above problems, the present invention improves the structure of the differential dielectric layer so that a more efficient photovoltaic discharge is generated during plasma discharge using the photovoltaic region, thereby lowering the discharge start voltage and improving the discharge efficiency. It aims to provide.

In the plasma display panel of the present invention for solving the above technical problem, a scan electrode and a sustain electrode are formed on a front substrate, a dielectric layer is formed on the scan electrode and the sustain electrode, and the address is arranged to cross the scan electrode and the sustain electrode. A plasma display panel comprising a back substrate having electrodes formed thereon and a partition wall partitioning discharge cells on the back substrate, wherein the dielectric layer includes a depression recessed to a predetermined depth between the scan electrode and the sustain electrode spaced a predetermined distance apart. It features.

The distance between the scan electrode and the sustain electrode is 150 μm or more and 400 μm or less.

Also, The width in the depression of the dielectric layer is characterized by being formed at 50% or more and 90% or less between the scan electrode and the sustain electrode spaced apart from each other by a predetermined distance.

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

3 is a view showing a dielectric layer formed in the plasma display panel according to the present invention. As shown in FIG. 3, the scan electrode 302 and the sustain electrode 303 are formed on the front substrate 300 as in FIG. 2, and the dielectric layer 304a is disposed on the scan electrode 302 and the sustain electrode 303. ) Is formed. In addition, an address electrode 313 arranged to intersect with this is formed on the rear substrate 310, a partition 312 is formed to partition discharge cells, and a dielectric layer 304b is formed on the address electrode 313. . In addition, R, G, and B phosphor layers 314 that emit visible light for image display upon address discharge are formed on the dielectric layer 304b.

The dielectric layer 304a described above is a differential dielectric having a differential thickness. The dielectric layer 304a has a predetermined depth between the scan electrode 302 and the sustain electrode 303 at a predetermined distance d ₂ . and a depression 320 recessed into (w ₂ ).

However, the present invention has the same structure as that of the conventional panel, but the discharge region causing the discharge between the scan electrode 302 and the sustain electrode 303 is formed using the positive electrode region of the scan electrode 302 and the sustain electrode 303. As the discharge distance d ₂ is varied, the width w ₂ of the recess 320 of the dielectric layer 304 is also varied to find an optimum condition and lower the discharge start voltage to improve discharge efficiency. Here, the Yanggwangju region will be described in more detail with reference to FIG. 4.

4 is a diagram for explaining a discharge region between electrodes. As shown in FIG. 4, when voltages are respectively applied to the cathode and the anode, secondary electrons generated and emitted by the cathode collision of the ions are accelerated by the electric field and thus collide with the neutral particles. Will generate new electrons. Secondary electrons are accelerated more strongly in the negative glow region where the magnitude of the electric field is larger as the voltage changes. The electrons generated as a collision continue to obtain energy in the state of ionization, and reach the positive column region. In the positive region, energy is no longer obtained, and energy is transmitted to the neutral particles through the collision. In this process, the excited particles fall to the ground and generate visible and vacuum ultraviolet rays.

Of these discharge regions, the positive light main region emits light by exciting gas only with electrons having high energy in the whole, not energy due to an electric field. In addition, in the positive light main region, ionization hardly occurs and a lot of light emission due to excitation is generated, and the efficiency of converting energy into light as a whole increases.

As described above, the width w ₂ of the recess 320 of the dielectric layer 304a is also varied according to the predetermined distance d ₂ between the scan electrode 302 and the sustain electrode 303 using the above-mentioned positive light region. In order to achieve the optimum discharge condition, the distance d ₂ between the scan electrode 302 and the sustain electrode 303 is preferably 150 μm or more and 400 μm or less.

In addition, the width w _{2 in} the recess 320 of the dielectric layer 304a is varied between the scan electrode 302 and the sustain electrode 303 spaced apart by a predetermined distance in the horizontal direction. The width of is preferably 50% or more and 90% or less between the scan electrode and the sustain electrode spaced apart from each other by a predetermined distance.

For example, when the distance d ₂ between the scan electrode 302 and the sustain electrode 303 is 150 μm or more and 160 μm or less, the horizontal direction of the scan electrode 302 or the sustain electrode 303 of the depression 320 is shown. The width w ₂ is preferably 90 μm or more and 100 μm or less, and the depression 320 when the spaced distance d ₂ between the scan electrode 302 and the sustain electrode 303 is 390 μm or more and 400 μm or less. The width w ₂ of the scan electrode 302 or the sustain electrode 303 in the horizontal direction is preferably 330 µm or more and 340 µm or less. As such, the reason for adjusting the width w ₂ of the recess 320 of the differential dielectric layer 304a according to the distance d ₂ between the scan electrode 302 and the sustain electrode 303 is because of the scan electrode 302. This is because the discharge voltage changes depending on the distance between the 302 and the sustain electrode 303. For example, when the distance d ₂ between the scan electrode 302 and the sustain electrode 303 described above is 150 μm or more and 160 μm or less, the width w ₂ of the recess 320 is relatively wide. Discharge using the positive light region easily occurs, but the discharge voltage rises relatively excessively, and the discharge efficiency decreases. For this reason, when the distance d ₂ between the scan electrode 302 and the sustain electrode 303 described above is 150 μm or more and 160 μm or less, when considering both the discharge voltage and the discharge using the positive light region, It is preferable that the width w ₂ of 320 is 90 µm or more and 100 µm or less.

In addition, for example, when the distance d ₂ between the scan electrode 302 and the sustain electrode 303 described above is 330 µm or more and 340 µm or less, when the width of the recess 320 is relatively narrow, the discharge voltage is reduced. Although it can be lowered, the discharge using the effective positive beam region is difficult and the luminance is reduced. For this reason, when the above-mentioned distance d ₂ between the scan electrode 302 and the sustain electrode 303 is 390 µm or more and 400 µm or less, when considering both the discharge voltage and the discharge using the positive beam region, It is preferable that the width w ₂ of 320 be 330 µm or more and 340 µm or less.

As described above, the dielectric layer 304 is formed by varying the discharge distance d ₂ between the scan electrode 302 and the sustain electrode 303 by using the positive light region in the discharge region causing the discharge between the scan electrode 302 and the sustain electrode 303. Also, the width w ₂ of the recess 320 may be varied to find an optimal condition, thereby lowering the discharge start voltage and increasing the discharge efficiency, thereby improving the overall driving characteristics of the panel.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the present invention has the effect of improving the discharge efficiency by lowering the discharge start voltage of the plasma display panel.

Claims (3)

A scan electrode and a sustain electrode are formed on the front substrate, a dielectric layer is formed on the scan electrode and the sustain electrode, and a rear substrate having an address electrode arranged to intersect the scan electrode and the sustain electrode; A plasma display panel including partition walls for partitioning discharge cells, And the dielectric layer includes a depression recessed to a predetermined depth between the scan electrode and the sustain electrode spaced apart from each other by a predetermined distance. The method of claim 1, And a spaced distance between the scan electrode and the sustain electrode is 150 µm or more and 400 µm or less. The method of claim 1, And a width within the depression of the dielectric layer is 50% or more and 90% or less between a portion where the scan electrode and the sustain electrode are separated by a predetermined distance.

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