KR100400392B1 - Triode surface discharge plasma display panel - Google Patents

Abstract

PURPOSE: A triode surface discharge plasma display panel is provided to achieve improved luminance and lengthen the useful life of the panel by preventing generation of high temperature heat at the panel and driving system. CONSTITUTION: A triode surface discharge plasma display panel comprises a front glass substrate(11) serving as a display surface; a rear glass substrate(12) spaced apart from the front glass substrate; and a plurality of barrier ribs(13a,13b) arranged on the surface of the rear glass substrate opposed to the front glass substrate so as to cooperate with the front and rear glass substrates to form a plurality of discharge spaces. The barrier ribs are made of a magnetic powder material. Barrier rib electrode lines(20a,20b) for magnetizing the corresponding barrier ribs are inserted into the lower ends of the barrier ribs, respectively.

Description

3-electrode surface discharge plasma display panel

The present invention relates to a three-electrode surface discharge plasma display panel, and more particularly, to a three-electrode surface discharge plasma display panel in which barrier ribs are formed of a magnetic powder material having soft magnetic properties and barrier rib electrode lines for magnetizing the barrier ribs, Electrode discharge plasma display panel in which a spiral discharge current path is induced in a corresponding discharge space when each cell is discharged.

2. Description of the Related Art Generally, a plasma display panel is a type of light-emitting device that displays an image by using an internal gas discharge phenomenon. Since there is no need to attach an active device to each cell, a manufacturing process is simple, And is attracting attention as a display device of a direct view type image display device having a large screen with a high speed, especially an image display device oriented toward the HDTV (High Definition TeleVision) age.

Among these plasma display panels, three types of electrodes are allocated to each of the plasma display panels having a three-electrode surface discharge structure, and the most general structure is known from U.S. Patent No. 4,988,585.

1 and 2, the conventional three-electrode surface discharge plasma display panel disclosed in the above-mentioned United States patent discloses a front glass substrate 1 as a display surface of an image, And a back glass substrate (2), which are formed at regular intervals on opposite surfaces of the rear glass substrate (2) with respect to the front glass substrate (1) A plurality of barrier ribs 3 for forming a plurality of discharge spaces together with the plurality of barrier ribs 1 and 2, a plurality of address electrode lines 4 formed between the plurality of barrier ribs 3, A phosphor layer 5 formed to surround the address electrode lines 4 on the both side wall surfaces and the rear glass substrate surface to emit visible light upon discharge and a phosphor layer 5 formed on the rear glass substrate 2, And the address electrodes A plurality of first and second sustain electrode lines 6a, 6b, 7a and 7b formed at predetermined intervals so as to be orthogonal to the first and second sustain electrode lines 6a, 6b, 7a and 7b, A dielectric layer 8 formed on the dielectric layer 8 for limiting a discharge current and a magnesium oxide (MgO) protection layer 7 formed on the dielectric layer 8 to protect the first and second sustain electrode lines 6a, 6b, 7a and 7b A layer 9, and a discharge gas injected into each of the discharge spaces.

The first and second sustain electrode lines 6a, 6b, 7a and 7b are composed of first and second transparent electrode lines 6a and 6b and first and second bus electrode lines 7a and 7b The first and second transparent electrode lines 6a and 6b generate mutual surface discharge in the corresponding discharge space when a discharge voltage is supplied to both ends of the first and second transparent electrode lines 6a and 6b, Are formed on the two transparent electrode lines 6a and 6b, respectively, to prevent a voltage drop due to the resistance of the first and second transparent electrode lines 6a and 6b.

The entire screen is divided into a plurality of cells by a plurality of address electrode lines 4 and a plurality of first and second transparent electrode lines 6a and 6b.

The image display process of any one of the conventional three-electrode surface discharge plasma display panels having the above-described configuration is as follows.

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

When an address discharge voltage is applied to the first transparent electrode line 6a and the address electrode line 4, an address discharge (main discharge) occurs between the first transparent electrode line 6a and the address electrode line 4, The discharge gas injected into the discharge space is ionized by electrons and ions to emit ultraviolet rays and the phosphor layer 5 formed on the inner surface of the discharge space is excited by the ultraviolet rays to emit visible light, Is emitted to the outside through the front glass substrate 1, it is possible to recognize light emission of an arbitrary cell from outside, that is, image display.

Thereafter, when a sustain discharge voltage of 150 V or more is supplied to the first and second transparent electrode lines 6a and 6b, a sustain discharge occurs between the first and second transparent electrode lines 6a and 6b, Lt; / RTI >

However, since the conventional three-electrode surface discharge plasma display panel is driven by a high discharge starting voltage of 150V to 300V and a high sustain discharge voltage of 150V or more, a high temperature is generated in the panel and the driving system, And the lifetime is shortened and the reliability of operation is deteriorated.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a discharge current path having a spiral shape in a discharge space of each cell to further increase the discharge current path, Electrode discharge plasma display panel.

1 is an exploded perspective view of a conventional three-electrode surface discharge plasma display panel,

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

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

FIG. 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 (the front glass substrate is rotated by 90 °)

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

Description of the Related Art [0002]

11: front glass substrate 12: rear glass substrate

13, 13a, 13b: barrier ribs 20, 20a, 20b: barrier rib electrode lines

In order to accomplish the above object, a three-electrode surface discharge plasma display panel according to the present invention is characterized in that each of the barrier ribs is formed of a magnetic powder material, and barrier rib electrode lines are formed at the lower end of each barrier rib, And a large magnetic flux is formed between neighboring partition walls by magnetizing the partition walls so that a spiral discharge current path is induced in the discharge spaces.

In addition, the three-electrode surface discharge plasma display panel according to the present invention is a three-electrode surface discharge plasma display panel in which each barrier rib has a small magnetic field formed by the corresponding barrier rib electrode line, that is, and is formed of a ferrite powder material.

Hereinafter, embodiments 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.

As shown in FIG. 3, an embodiment of the present invention includes a front glass substrate 11 serving as a display surface of an image; A rear glass substrate 12 disposed parallel to the front glass substrate 11 with a predetermined distance therebetween; A plurality of discharge spaces are formed on the rear glass substrate 12 at regular intervals on the surfaces facing the front glass substrate 11 to form a plurality of discharge spaces together with the front and rear glass substrates 11 and 12, A plurality of partition walls 13 formed of a ferrite powder material; A plurality of address electrode lines (14) formed between the plurality of barrier ribs (13); A phosphor layer (15) formed to surround the address electrode lines (14) on both side wall surfaces and the rear glass substrate surface of the inner surfaces of the discharge spaces and to emit visible light upon discharge; A plurality of first and second sustain electrode lines 16a, 16b, 17a (16a, 16b, 17a) formed at regular intervals so as to be orthogonal to the respective address electrode lines 14 are formed on a surface of the front glass substrate 11 facing the rear glass substrate 12, , 17b); A dielectric layer 18 formed on the plurality of first and second sustain electrode lines 16a, 16b, 17a, and 17b to limit a discharge current; A magnesium oxide protective layer 19 formed on the dielectric layer 18 to protect the plurality of first and second sustain electrode lines 16a, 16b, 17a, and 17b; A discharge gas injected into each of the discharge spaces; And a plurality of barrier rib electrode lines 20 formed at the lower ends of the barrier ribs 13 and magnetizing the barrier ribs 13 at the time of discharge.

The first and second sustain electrode lines 16a and 16b and the first and second bus electrode lines 17a and 17b are connected to the first and second transparent electrode lines 16a and 16b and the first and second bus electrode lines 17a and 17b, ).

An image display process of any one of the three-electrode surface discharge plasma display panels according to an embodiment of the present invention will now be described with reference to FIG.

First, a discharge start voltage is supplied to the first and second transparent electrode lines 16a and 16b, and on both side barrier rib electrode lines 20a and 20b formed on the lower ends of the side barrier ribs 13a and 13b, (Auxiliary discharge) is generated between the first and second transparent electrode lines 16a and 16b, and both side walls 13a and 13b are electrically connected to the corresponding barrier ribs 16a and 16b, Are magnetized by the magnetic fields formed by the lines 20a and 20b to form a magnetic flux in the corresponding discharge space to induce a spiral discharge current path, thereby forming many wall charges on the inner surface of the discharge space.

Thereafter, when an address discharge voltage is supplied to the first transparent electrode line 16a and the address electrode line 14 and a current is supplied to the both side wall electrode lines 20a and 20b as in the auxiliary discharge, An address discharge (main discharge) occurs between the electrode line 16a and the corresponding address electrode line 14 while both side walls 13a and 13b form a magnetic flux in the corresponding discharge space to induce a helical discharge current path, The discharge gas injected into the discharge space by the spiral discharge current path is ionized into electrons and ions and ultraviolet rays are emitted and the phosphor 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 is emitted to the outside, light emission of an arbitrary cell, that is, image display, can be recognized from the outside.

Subsequently, when the sustain discharge voltage is supplied to the first and second transparent electrode lines 16a and 16b and current is supplied to the both side wall electrode lines 20a and 20b, the first and second transparent electrode lines 16a and 16b ), A spiral discharge current path is induced in the corresponding discharge space, and the light emission of any cell is maintained for a predetermined time.

That is, as the discharge current path formed in the discharge space becomes longer, the amount of ultraviolet rays emitted increases, and the amount of excitation of the phosphor layer 15, that is, the amount of visible light, increases. Since the spiral discharge current path is much longer than the conventional vertical discharge current path, the visible light generation amount of the cell is increased and the luminance of the corresponding cell is also increased.

In addition, since the barrier ribs 13 are formed of ferrite powder material, even if a small current is supplied to the barrier rib electrode lines 20 even if the magnetic field formed by the barrier rib electrode lines 20 is small, A large magnetic flux of 5000 G or more can be formed while rapidly saturating due to the hysteresis characteristic as described above, and the power consumed for magnetizing the partition walls 13 is not a problem.

On the other hand, in one embodiment of the present invention, when the discharge voltage is equal to that of the conventional art, that is, when the discharge start voltage is 150V to 300V and the sustain discharge voltage is 150V or more, the discharge light emission amount of each cell is increased The luminance of each cell greatly increases. Therefore, when the luminance of each cell is realized in the same manner as in the prior art, the discharge start voltage and the sustain discharge voltage are significantly lowered.

As described above, according to the present invention, each barrier rib is formed of a magnetic powder material, and the barrier rib is magnetized during discharge to induce a helical discharge current path in the discharge space, so that the length of the discharge current path becomes much longer than in the conventional case, It is possible to prevent the occurrence of a high temperature in the panel and the drive system due to the increase of the luminance and the decrease of the discharge start voltage and the sustain discharge voltage in accordance with the increase of the luminance, .

Claims (3)

A front glass substrate which is a display surface of an image; a rear glass substrate which is disposed parallel to the front glass substrate with a predetermined distance therebetween; and a rear glass substrate which is formed at regular intervals on opposite surfaces of the rear glass substrate, And a plurality of barrier ribs for forming a plurality of discharge spaces together with the rear glass substrate, wherein the plurality of barrier ribs are formed of a magnetic powder material having soft magnetic properties, And a barrier electrode line for magnetizing the barrier rib at the time of discharge at the lower end of the barrier rib. The method according to claim 1, Wherein the magnetic powder material is a ferrite powder material. The method according to claim 1, Wherein the plurality of barrier ribs are magnetized by the barrier rib electrode lines during discharge to form a magnetic flux in the discharge space, thereby inducing a spiral discharge current path in the discharge space.