KR19980026446A - 3-electrode surface discharge plasma display panel - Google Patents

Abstract

The present invention relates to a three-electrode surface discharge plasma display panel in which a plurality of partition walls are formed of a magnetic powder material having soft magnetic properties, and partition wall electrode lines for magnetizing the partition walls at the lower ends of the partition walls are respectively inserted. Each partition is formed of a magnetic powder material, and when the discharge is magnetized to induce a spiral discharge current path inside the discharge space, the length of the discharge current path is much longer than in the prior art, and the brightness of each cell is greatly increased. In addition, the discharge start voltage and the sustain discharge voltage can be reduced according to the increase in brightness, thereby preventing high heat from being generated in the panel and the driving system, thereby increasing the service life and improving operational reliability.

Description

3-electrode surface discharge plasma display panel

The present invention relates to a three-electrode surface discharge plasma display panel, and in particular, each partition wall is formed of a magnetic powder material having soft magnetic properties, and a partition electrode line for magnetizing the partition wall at the lower end of each partition wall is inserted and formed. Accordingly, the present invention relates to a three-electrode surface discharge plasma display panel in which a spiral discharge current path is induced in a discharge space of each cell.

In general, a plasma display panel is a light emitting device that displays an image by using an internal gas discharge phenomenon, and there is no need to mount an active device for each cell, thereby simplifying the manufacturing process and facilitating a large screen. It has been spotlighted as a display element of a direct view type image display device having a large screen due to its high speed, particularly an image display device for HDTV (High Definition TeleVision) era.

There are various kinds of plasma display panels. Among them, a plasma display panel having a three-electrode surface discharge structure has three electrodes assigned to each cell, and the most common structure thereof is known from US Patent No. 4198585.

That is, the three-electrode surface discharge plasma display panel according to the prior art known in the US patent has a front glass substrate 1, which is a display surface of an image, and the front glass substrate 1, as shown in Figs. And the rear glass substrate 2 disposed in parallel with a predetermined distance therebetween, and the front and rear glass substrates formed at regular intervals on the opposite surface of the rear glass substrate 2 from the front glass substrate 1. 1, 2 together with a plurality of partitions 3 for forming a plurality of discharge spaces, a plurality of address electrode lines 4 formed between the plurality of partitions 3, and the inner surface of each of the discharge spaces A phosphor layer 5 formed on both side walls and a bottom glass substrate to surround the address electrode line 4 and emitting visible light during discharge, and the back glass substrate 2 of the front glass substrate 1; The address electrodes on the opposite surface to the A plurality of first and second sustain electrode lines 6a, 6b, 7a, and 7b formed at regular intervals to be orthogonal to the phosphorus 4, and the plurality of first and second sustain electrode lines 6a, 6b, 7a, and 7b. Magnesium oxide (MgO) protection formed on the dielectric layer 8 to limit discharge current and on the dielectric layer 8 to protect the plurality of first and second sustain electrode lines 6a, 6b, 7a, and 7b. Layer 9 and discharge gas injected into the respective discharge spaces.

Any of the first and second sustain electrode lines 6a, 6b, 7a, and 7b may be configured of the first and second transparent electrode lines 6a and 6b and the first and second bus electrode lines 7a and 7b. When the discharge voltage is supplied to both ends of the first and second transparent electrode lines 6a and 6b, surface discharge occurs in the corresponding discharge space, and the first and second bus electrode lines 7a and 7b are connected to the first and second bus electrode lines 7a and 7b. It is formed on the 2 transparent electrode lines 6a and 6b, respectively, and prevents the voltage drop by the resistance of the 1st, 2nd transparent electrode lines 6a and 6b.

In addition, the entire screen is divided into cell units by the plurality of address electrode lines 4 and the plurality of first and second transparent electrode lines 6a and 6b.

The image display process of any cell in the three-electrode surface discharge plasma display panel according to the prior art configured as described above is as follows.

First, when a discharge start voltage of 150 V to 300 V is supplied to the first and second transparent electrode lines 6a and 6b, surface discharge (auxiliary discharge) occurs between the first and second transparent electrode lines 6a and 6b, thereby causing the corresponding discharge. Wall charges are formed on the inner surface of the space.

After that, when an address discharge voltage is supplied to the first transparent electrode line 6a and the address electrode line 4, an address discharge (main discharge) between the first transparent electrode line 6a and the address electrode line 4 is performed. As a result, ultraviolet rays are emitted while the discharge gas injected into the discharge space is ionized by electrons and ions, and the phosphor layer 5 formed on the inner surface of the discharge space is excited by the ultraviolet rays to emit visible light. When the light passes through the front glass substrate 1 and exits to the outside, light emission of an arbitrary cell, that is, image display, can be recognized from the outside.

After that, when 150 V or more of sustain discharge voltage is supplied to the first and second transparent electrode lines 6a and 6b, sustain discharge occurs between the first and second transparent electrode lines 6a and 6b, so that light emission of a certain cell is constant. Maintained for hours.

However, since the conventional three-electrode surface discharge plasma display panel is driven at a high discharge start voltage of 150 V to 300 V and a high sustain discharge voltage of 150 V or higher, high heat is generated in the panel and the drive system to deform the parts of the panel and the drive system. It is easy to be destroyed or destroyed, thereby shortening the life, there was a problem that the operating reliability is lowered.

The present invention has been made to solve the above problems, the spiral discharge current path is formed in the discharge space of each cell to make the discharge current path longer to reduce the discharge voltage according to the increase in the discharge light emission amount It is an object of the present invention to provide a three-electrode surface discharge plasma display panel.

1 is an exploded perspective view of a three-electrode surface discharge plasma display panel according to the prior art;

FIG. 2 is a cross-sectional view of one cell of a three-electrode surface discharge plasma display panel according to the related art (however, the front glass substrate is rotated by 90 °);

3 is an exploded perspective view of a three-electrode surface discharge plasma display panel according to an embodiment of the present invention;

4 is a cross-sectional view of one cell of a three-electrode surface discharge plasma display panel according to an embodiment of the present invention, in which the front glass substrate is rotated by 90 °;

5 is a B-H characteristic curve diagram of the ferrite powder material used in one embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

11: front glass substrate 12: rear glass substrate

13, 13a, 13b: partition 20, 20a, 20b: partition electrode line

In order to achieve the above object, in the three-electrode surface discharge plasma display panel according to the present invention, each partition wall is formed of a magnetic powder material, and the partition electrode line is formed at the lower end of each partition wall so that each partition electrode line is discharged. By magnetizing the partition wall, a large magnetic flux is formed between neighboring partition walls, and the spiral discharge current path is induced in the discharge space.

Further, in the three-electrode surface discharge plasma display panel according to the present invention, even when the barriers have a small intensity of the magnetic field formed by the barrier electrode lines, that is, a ferrite capable of forming at least a large amount of current supplied to the barrier electrode lines. (ferrite) powder material.

Hereinafter, an embodiment of a three-electrode surface discharge plasma display panel according to the present invention will be described in detail with reference to the accompanying drawings.

One embodiment of the present invention includes a front glass substrate 11 which is a display surface of an image as shown in FIG. A rear glass substrate 12 positioned in parallel with the front glass substrate 11 at a predetermined distance therebetween; It is formed at a predetermined interval on the opposite surface of the rear glass substrate 12 with the front glass substrate 11 to form a plurality of discharge spaces together with the front and rear glass substrates (11, 12), of the magnetic powder material A plurality of partitions 13 formed of one ferrite powder material; A plurality of address electrode lines 14 respectively formed between the plurality of partition walls 13; A phosphor layer 15 formed to surround the corresponding address electrode line 14 on both partition walls and rear glass substrate surfaces of the inner discharge spaces, and emit visible light during discharge; The plurality of first and second sustain electrode lines 16a, 16b, and 17a formed at regular intervals on the opposite surface of the front glass substrate 11 to the rear glass substrate 12 so as to be orthogonal to the address electrode lines 14. , 17b); A dielectric layer (18) formed over said plurality of first and second sustain electrode lines (16a, 16b, 17a, 17b) to limit discharge current; A magnesium oxide protective layer (19) formed over the dielectric layer (18) to protect the plurality of first and second sustain electrode lines (16a, 16b, 17a, 17b); Discharge gas injected into each of the discharge spaces; Each of the barrier ribs 13 includes a plurality of barrier electrode lines 20 formed at lower ends of the barrier ribs 13 to magnetize the barrier ribs 13 during discharge.

The first and second sustain electrode lines 16a, 16b, 17a, and 17b may be formed of the first and second transparent electrode lines 16a and 16b and the first and second bus electrode lines 17a and 17b as in the conventional art described above. It is composed of

An image display process of any cell of the three-electrode surface discharge plasma display panel according to the exemplary embodiment of the present invention configured as described above will be described with reference to FIG. 4.

First, as shown in FIG. 4, the discharge start voltage is supplied to the first and second transparent electrode lines 16a and 16b and the two side partition electrode lines 20a and 20b formed at the lower ends of the both side partitions 13a and 13b. Similarly, when a current is supplied in a direction in which one side exits and a direction in which the other side enters, surface discharge (auxiliary discharge) occurs between the first and second transparent electrode lines 16a and 16b, and at the same time, both sidewalls 13a and 13b correspond to the partition electrode Due to the magnetic fields formed by the lines 20a and 20b, respectively, they are magnetized to form magnetic flux inside the corresponding discharge space to induce a spiral discharge current path, whereby a large number of wall charges are formed on the inner surface of the discharge space.

Subsequently, when the address discharge voltage is supplied to the first transparent electrode line 16a and the corresponding address electrode line 14, and the current is supplied to both of the partition electrode lines 20a and 20b in the same manner as the auxiliary discharge, the first transparent electrode Address discharge (main discharge) occurs between the electrode line 16a and the corresponding address electrode line 14, and both partition walls 13a and 13b form magnetic flux inside the discharge space to induce a spiral discharge current path. As the discharge gas injected into the discharge space by the spiral discharge current path is ionized by electrons and ions, ultraviolet rays are emitted, and the fluorescent layer 15 formed on the inner surface of the discharge space is excited by the ultraviolet rays to emit visible light. When the visible light passes through the front glass substrate 11 and exits to the outside, light emission of an arbitrary cell, that is, image display, may be recognized from the outside.

Thereafter, when the sustain discharge voltage is supplied to the first and second transparent electrode lines 16a and 16b and the current is supplied to both of the partition electrode lines 20a and 20b, the first and second transparent electrode lines 16a and 16b are provided. At the same time, the sustain discharge occurs, and a spiral discharge current path is induced inside the corresponding discharge space, so that light of any cell is maintained for a predetermined time.

That is, the longer the discharge current path formed in the discharge space is, the longer the ultraviolet emission amount increases, thereby increasing the amount of excitation of the phosphor layer 15, that is, the amount of visible light generation, which is induced in the discharge space of each cell according to the present invention. Since the spiral discharge current path is much longer than the conventional vertical discharge current path, the visible light generation amount of the corresponding cell is increased, and thus the brightness of the corresponding cell is also increased.

In addition, since each of the barrier ribs 13 is formed of a ferrite powder material, even if the intensity of the magnetic field formed by the barrier electrode line 20 is small, that is, even if a small current is supplied to the barrier electrode line 20, the barrier ribs 13 are shown in FIG. 5. As described above, it is possible to form a large magnetic flux of 5000 G or more while rapidly saturating due to the hysteresis characteristic, so that the power consumed to magnetize each of the partition walls 13 is not a problem.

On the other hand, according to one embodiment of the present invention, when the discharge voltage conditions are the same as the prior art, that is, when the discharge start voltage is 150V to 300V, and the sustain discharge voltage is 150V or more, the amount of discharge light emission of each cell increases as described above. Since the brightness of each cell is greatly increased, when the brightness of each cell is implemented in the same manner as in the prior art, the discharge start voltage and the sustain discharge voltage are greatly lowered.

As described above, in the present invention, each barrier rib is formed of a magnetic powder material, and when the discharge is magnetized, the barrier rib is magnetized to induce a spiral discharge current path inside the discharge space. The luminance is greatly increased, and the discharge start voltage and sustain discharge voltage can be decreased according to the increase in luminance, thereby preventing high heat from being generated in the panel and the driving system, thereby increasing the service life and improving operational reliability. There is.

Claims (3)

The front glass substrate, which is a display surface of an image, a rear glass substrate positioned in parallel with a predetermined distance from the front glass substrate, and formed on the opposite surface of the rear glass substrate at a predetermined distance from the front glass substrate; And a plurality of barrier ribs for forming a plurality of discharge spaces together with a rear glass substrate, wherein the plurality of barrier ribs are formed of a magnetic powder material having soft magnetic properties. 3. The three-electrode surface discharge plasma display panel of claim 1, wherein a partition electrode line is formed at each of the lower ends of the partition electrode to magnetize the partition wall. The method of claim 1, And the magnetic powder material is a ferrite powder material. The method of claim 1, And the plurality of partition walls are magnetized by corresponding partition electrode lines during discharge to form a magnetic flux into the corresponding discharge space to induce a spiral discharge current path within the discharge space.