KR100246224B1 - Ac plasma display panel - Google Patents

Abstract

The present invention relates to an AC plasma display panel having a front substrate, a back substrate, a plurality of partition walls, a plurality of address electrode lines, and a plurality of first and second sustain electrode line pairs. And a groove or a protrusion is selectively formed on the rear substrate to increase the discharge and light emitting area, thereby increasing the brightness of the entire screen, and forming a pair of first and second sustain electrode lines on the inner surface of the groove formed on the front substrate. In addition, since a short discharge path is formed almost horizontally between the two sustain electrode lines, low voltage driving is possible, and the uniformity of the image displayed in each cell is ensured, thereby improving image quality.

In addition, the present invention is the ultraviolet light and visible light is reflected in the inner space of the groove selectively formed in the back substrate inside the discharge space of each cell, or the space between the protrusions and the two side partitions are also selectively formed when the discharge of each cell In addition, since the visible light causes the phosphor layer to be re-excited many times in various directions, the luminance of the entire screen and the uniformity of the image are improved.

Description

AC plasma display panel {AC plasma display panel}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC plasma display panel, and more particularly, to an AC plasma display panel in which the internal structure of the discharge space of each cell is changed so that the discharge and light emitting regions are enlarged and the horizontal discharge path is short.

In general, a plasma display panel is a light emitting device that displays an image by using a gas discharge phenomenon occurring in each discharge cell. The manufacturing process is simple, the screen is easy to be enlarged, and the response speed is high. Gaji has been spotlighted as a display element of a direct view type image display device, particularly an image display device for HDTV (High Definition Television) era.

In addition, a panel driven by a sinusoidal alternating current voltage or a pulse voltage among the plasma display panels is called an alternating current (AC) plasma display panel.

The configuration of a three-electrode surface discharge plasma display panel, which is one of the AC plasma display panels according to the related art, will be described with reference to the separated perspective view shown in FIG. 1 and some side cross-sectional views shown in FIG. 2.

That is, the three-electrode surface discharge plasma display panel according to the prior art has a front substrate 51 which is a display surface of an image, a back substrate 52 positioned in parallel with a predetermined distance from the front substrate 51, and The partition wall 53 is arranged between the front substrate 51 and the rear substrate 52 to form a plurality of discharge spaces, and the partition wall is disposed on an opposite surface of the front substrate 51 to the rear substrate 52. A plurality of pairs of first and second sustain electrode lines 54 and 55 arranged to be orthogonal to 53 and formed on the rear substrate 52 between the partition walls 53 in parallel with the partition walls 53. A plurality of address electrode lines 56 for generating a discharge together with the plurality of first and second sustain electrode lines 54 and 55, a back substrate 52, a partition 53, and an address electrode in the respective discharge spaces; Formed on the line 56 to emit visible light upon discharge of each cell. The phosphor layers 57 and the opposite surface of the back substrate 52 of the front substrate 51 so as to cover the plurality of pairs of the first and second sustain electrode lines 54 and 55 so as to have a predetermined thickness. A pair of dielectric layers 58 for limiting a discharge current upon discharge of a cell and the plurality of first and second sustain electrode lines 54, 55 formed on the dielectric layer 58 from sputtering occurring during discharge of each cell; And a magnesium oxide (MgO) protective film 59 that protects the dielectric layer 58, and discharge gas is injected into each discharge space.

In addition, the point where the pair of first and second sustain electrode lines 54 and 55 and the address electrode line 56 cross each other corresponds to one cell, and thus the entire screen is composed of a plurality of cells having a matrix form.

A process of displaying an image on the three-electrode surface discharge plasma display panel configured as described above will be described below. (Herein, an addressing and display system (ADS) subfield method, which is one of various image display methods, will be described as an example.) .

First, when an erase pulse, a write pulse, and an erase pulse are sequentially supplied to all of the first and second sustain electrode lines 54 and 55, the first and second sustain electrode lines 54 and 55 are respectively provided. More specifically, the wall charge is formed on the magnesium oxide protective film 59. At this time, a discharge path is formed between the first and second sustain electrode lines 54 and 55.

Thereafter, scan pulses are sequentially supplied to the plurality of pairs of first and second sustain electrode lines 54 and 55, and at the same time, first and second sustain electrode lines 54 and 55 to which scan pulses are supplied. When the address pulses (gradation data) of a plurality of cells corresponding to the pair are supplied to the plurality of address electrode lines 56, the logic is " high " with the first and second sustain electrode lines 54 and 55 paired with the scan pulses and the address pulses. The address discharge is generated in the discharge space of each cell corresponding to the intersection of the address electrode line 56 supplied with "high". At this time, the wall charge accumulated in the discharge space of each cell lowers the external supply voltage for address discharge.

When the address discharge is generated in the discharge space of some cells, the discharge gas injected into the discharge space is ionized by electrons and ions into a plasma state, and the particles excited by the collision in the plasma state fall to the ground state. Ultraviolet rays are emitted toward the phosphor layer 57, and the phosphor layer 57 is excited by the collision of ultraviolet rays to emit visible light, and the visible light is emitted to the outside through the front substrate 51.

Thereafter, when a sustain pulse is supplied to all of the first and second sustain electrode lines 54 and 55, sustain discharge occurs between each of the first and second sustain electrode lines 54 and 55, so that the address discharge has occurred. Light emission (emission of visible light, display of an image) is held for a predetermined time.

In addition, when the sustain discharge having a different period from the address discharge as described above is repeatedly performed alternately, gradation of the image displayed in each cell becomes possible.

However, the AC plasma display panel according to the related art requires a high driving voltage, resulting in an increase in the price of the driving IC (Integrated Circuit), and thus, the price of the entire display system is high.

In addition, the AC plasma display panel according to the prior art has a problem that it is difficult to put practical use because the luminance of the entire screen is significantly lower than that of a CRT (Cathode Ray Tube), an LCD (Liquid Crystal Display), and the like, which are widely known as image display means.

In addition, since the discharge paths formed between the first and second sustain electrode lines are not formed horizontally, the AC plasma display panel according to the prior art does not discharge evenly in the entire discharge space of each cell. There was a problem that can not secure uniformity (uniformity).

The present invention has been made to solve the above problems, the groove is formed in the front substrate inside the discharge space of each cell, and the back substrate is also selectively formed in the discharge substrate and the light emitting area of each cell is expanded than the prior art It is an object of the present invention to provide an AC plasma display panel in which the luminance of the entire screen is increased.

In addition, in the present invention, the first and second sustain electrode line pairs are formed on the inner surface of the groove formed in the front substrate inside the discharge space of each cell, so that the discharge path formed between the first and second sustain electrode lines is shorter than that of the prior art. Another object is to provide an AC plasma display panel in which the external voltage supplied to the second sustain electrode line is lowered and the discharge path is formed almost horizontally to ensure uniformity of the image displayed in each cell.

In addition, an object of the present invention is to provide an AC plasma display panel in which the projection region is selectively formed on the rear substrate inside the discharge space of each cell, thereby increasing the light emitting area of each cell, thereby increasing the brightness of the entire screen. .

1 is an exploded perspective view of a three-electrode surface discharge plasma display panel which is one of the conventional AC plasma display panels;

FIG. 2 is a partial side cross-sectional view of the panel shown in FIG. 1 (where the front substrate is rotated 90 °),

3 to 7 are some side cross-sectional views of AC plasma display panels according to a preferred embodiment of the present invention, with the front substrate rotated by 90 °.

<Description of the symbols for the main parts of the drawings>

1: front substrate 2, 12, 22: back substrate

3: bulkhead 4, 5: first and second sustain electrode lines

6, 16, 26: address electrode line 7, 17, 27: phosphor layer

8: dielectric layer 9: magnesium oxide (MgO) protective film

In order to achieve the above object, the AC plasma display panel according to the present invention includes a front and rear substrates, a plurality of partition walls formed on the rear substrate and having a constant distance from the front substrate to form a discharge space, and the rear substrate. A plurality of address electrode lines formed on the barrier ribs, and a pair of sustain electrodes formed on the front substrate in a direction orthogonal to the address electrode lines;

A groove is formed in the front substrate in a direction orthogonal to the partition wall, and the sustain electrode pairs are positioned in the groove, respectively.

According to an embodiment of the present invention, stripe grooves are formed on the back substrates between the partition walls, and the address electrode lines are formed on the inner surface of the stripe grooves, respectively;

Preferably, stripe-shaped protrusions are formed on the back substrates between the partition walls, and the address electrode lines are formed on the stripe-shaped protrusions, respectively.

Hereinafter, a preferred embodiment of an AC plasma display panel according to the present invention will be described in detail with reference to the accompanying drawings.

<First Embodiment>

In the structure of the three-electrode surface discharge plasma display panel described in the prior art, the AC plasma display panel according to the first embodiment of the present invention has been changed in the structure of the front substrate inside the discharge space of each cell. The front substrate is rotated 90 °) is shown in FIGS.

3 to 5, reference numeral 1 denotes a front substrate which is a display surface of an image, 2 denotes a back substrate positioned in parallel with a predetermined distance from the front substrate 1, and 3 denotes the front substrate 1 ) And the rear substrate 2 are arranged to form a partition wall forming a plurality of discharge spaces.

In the above, a plurality of stripe grooves orthogonal to the partition wall 3 are formed on the opposite surface of the front substrate 1 to the rear substrate 2, and each stripe groove has various grooves, for example, 3 may be an arc-shaped groove shown in FIG. 3, a rectangular groove shown in FIG. 4, a triangular groove shown in FIG. 5, or the like.

Further, reference numerals 4 and 5 denote first and second sustain electrode line pairs respectively formed on the inner surface of the plurality of stripe grooves formed on the front substrate 1, and 6 denotes the rear substrate 2 between the partition walls 3. A plurality of address electrode lines which are formed in parallel with the barrier ribs 3 to cause discharge together with a plurality of pairs of first and second sustain electrode lines 4 and 5, and 7 denotes a rear substrate 2 in each discharge space. And a plurality of phosphor layers respectively formed on the barrier rib 3 and the address electrode line 6 to emit visible light upon discharge of each cell.

In addition, reference numeral 8 is formed to have a constant thickness so as to cover a plurality of pairs of first and second sustain electrode lines 4 and 5 on the opposite surface of the front substrate 1 to the rear substrate 2 to discharge each cell. A dielectric layer for limiting a discharge current is shown, and 9 is formed on the dielectric layer 8 to have a constant thickness, and the pair of the plurality of first and second sustain electrode lines 4 and 5 and the dielectric layer 8 are formed from sputtering occurring during discharge of each cell. ), And a magnesium oxide protective film for protecting), and discharge gas is injected into each discharge space.

The operation and effects of the AC plasma display panel according to the first embodiment of the present invention configured as described above will be described as follows.

First, in the first embodiment of the present invention, the discharge and light emitting regions of each cell are enlarged by an area corresponding to a plurality of stripe-shaped inner spaces formed in the front substrate 1, so that the brightness of each cell is increased. .

In addition, in the first embodiment of the present invention, the formation area of the magnesium oxide protective film 9 of each cell is increased by the stripe groove formed in the front substrate 1, compared to the prior art, and thus the first and second sustain electrode lines 4 are formed. And 5) more wall charges are accumulated on the magnesium oxide protective film 9 during the discharge between the first and second sustain electrode lines 4 and 5 on the inner surface of the stripe groove. The distance between the electrode lines 4 and 5 becomes narrow (as can be easily seen in FIGS. 2 and 3), and the discharge path between the first and second sustain electrode lines 4 and 5 becomes short.

Therefore, even when a driving voltage lower than that of the prior art is supplied at the address discharge and the sustain discharge of each cell, the same operation and effect as in the prior art can be obtained, thereby enabling low voltage driving.

In the above, when the first and second sustain electrode lines 4 and 5 are formed on the inner surface of the stripe groove formed on the front substrate 1, the discharge path between the first and second sustain electrode lines 4 and 5 is shortened and is substantially reduced. By forming horizontally, the discharge occurs evenly in the entire area inside the discharge space of each cell, thereby ensuring the uniformity of the image displayed in each cell.

Second Embodiment

In the structure of the AC plasma display panel according to the second embodiment of the present invention, the structure of the back substrate inside the discharge space of each cell is changed in the structure of the first embodiment of the present invention. Is shown in FIG. 6.

In FIG. 6, members having the same reference numerals as those in the first embodiment of the present invention (shown in FIGS. , Members having different reference numbers will be described in more detail below.

In FIG. 6, reference numeral 12 denotes a rear substrate positioned parallel to the front substrate 1 with a predetermined distance therebetween, wherein a plurality of stripe grooves are formed on the rear substrate 12 between each partition 3. It is.

Each of the stripe grooves formed on the back substrate 12 is a groove of various shapes, for example, an arc groove shown in FIG. 6 or a rectangular groove not shown in the drawing, similarly to the stripe groove formed on the front substrate 1. , Triangular grooves, or the like, and may be formed at least one of each partition 3.

In addition, reference numeral 16 is a plurality of addresses formed on the inner surface of the stripe groove formed in the back substrate 12 between each partition 3 to cause discharge together with the pair of first and second sustain electrode lines 4 and 5. An electrode line is shown, and 17 represents a plurality of phosphor layers formed on the inner partition 3 of the discharge space of each cell, the back substrate 12, and the address electrode line 16, respectively, and emit visible light upon discharge of each cell.

The operation and effects of the AC plasma display panel according to the second embodiment of the present invention configured as described above will be described below in comparison with the prior art and the first embodiment of the present invention.

First, the second embodiment of the present invention also has a stripe groove formed on the front substrate 1 as in the first embodiment of the present invention to enlarge the discharge region of each cell, and the magnesium oxide protective film 9 of each cell. Increases the wall charge accumulation amount, and pairs of first and second sustain electrode lines 4 and 5 are formed on the inner surface of the stripe groove to form first and second sustain electrode lines 4 and 5 of each cell. The discharge path is shortened, and the discharge path is formed almost horizontally, so that the effect of low voltage driving, increasing luminance of each cell and ensuring image uniformity can be obtained.

In addition, compared to the first embodiment of the present invention, the second embodiment of the present invention further expands the discharge and light emitting regions of each cell by an area corresponding to the inner space of the stripe-shaped groove formed on the rear substrate 12. The brightness of the cell is further improved.

In addition, according to the second embodiment of the present invention, the address electrode lines 16 and the phosphor layer 17 are sequentially formed on the inner surfaces of the plurality of stripe grooves formed on the rear substrate 12 between the partition walls 3. Compared to the prior art or the first embodiment of the present invention, the area of the phosphor layer 17 is increased.

Accordingly, in the second embodiment of the present invention, since the amount of excitation of the phosphor layer 17 due to ultraviolet rays increases during the address discharge or the sustain discharge of each cell, the luminance of each cell is increased compared with the prior art or the first embodiment of the present invention. do.

In addition, the second embodiment of the present invention is compared with the prior art or the first embodiment of the present invention by the ultraviolet light and visible light is reflected in the stripe groove inner space formed in the back substrate 12 inside the discharge space during discharge of each cell, Ultraviolet rays and visible light re-examine the phosphor layer 17 many times in various directions, thereby increasing the amount of excitation of the phosphor layer 17 and increasing the brightness of each cell.

In addition, although the second embodiment of the present invention is not shown in the drawings, the larger the number of stripe grooves formed in the back substrate 12 between each partition 3, the higher the luminance of each cell is.

Third Embodiment

In the structure of the AC plasma display panel according to the third embodiment of the present invention, the structure of the back substrate inside the discharge space of each cell is changed in the structure of the first embodiment of the present invention, and a partial side cross-sectional view thereof (the front substrate is rotated by 90 °). Is shown in FIG. 7.

In FIG. 7, members having the same reference numerals as those of the first and second embodiments of the present invention (shown in FIGS. 3 to 5) are formed in the same form as the first and second embodiments of the present invention, and thus have the same function. The description will be omitted, and members having different reference numbers will be described in more detail below.

In FIG. 7, reference numeral 22 denotes a rear substrate positioned parallel to the front substrate 1 with a predetermined distance therebetween, among which a plurality of stripe-shaped protrusions 22a are disposed on the rear substrate 22 between the partition walls 3. Are formed respectively.

Each of the stripe-shaped protrusions 22a formed on the rear substrate 22 may have a vertical cross section with respect to the rear substrate 22 in various shapes, for example, an arc shape shown in FIG. 7 or a rectangle or triangle not shown in the drawings. Or the like, and may be formed at least one of each partition 3.

In addition, reference numeral 26 is formed on the stripe-shaped protrusion 22a formed on the rear substrate 22 between the partitions 3, respectively, to generate a plurality of discharges together with the pair of first and second sustain electrode lines 4 and 5, respectively. Address electrode lines are shown, and 27 represents a plurality of phosphor layers formed on the inner partition 3 of the discharge space of each cell, the back substrate 22, and the address electrode lines 26, respectively, and emit visible light upon discharge of each cell. .

The operation and effects of the AC plasma display panel according to the third embodiment of the present invention configured as described above will be described in comparison with the prior art and the first and second embodiments of the present invention.

First, the third embodiment of the present invention also has a stripe-shaped groove formed on the front substrate 1 as in the first and second embodiments of the present invention, so that the magnesium oxide protective film 9 formation area of each cell is increased, so that the wall charges are increased. The accumulation amount increases, and pairs of first and second sustain electrode lines 4 and 5 are formed on the inner surface of the stripe groove to shorten a discharge path between the first and second sustain electrode lines 4 and 5 of each cell. The discharge path is formed almost horizontally to obtain the effect of low voltage driving, increasing luminance of each cell and ensuring image uniformity.

In addition, according to the third embodiment of the present invention, the address electrode line 26 and the phosphor layer 27 are sequentially stacked on the upper surface of the plurality of stripe-shaped protrusions 22a formed on the rear substrate 22 between the partition walls 3. By forming, the area of the phosphor layer 27 is increased compared with the prior art or the first embodiment of the present invention.

Therefore, in the third embodiment of the present invention, since the amount of excitation of the phosphor layer 27 due to ultraviolet rays increases during the address discharge or the sustain discharge of each cell, the luminance of each cell is increased compared with the prior art or the first embodiment of the present invention. do.

In addition, the third embodiment of the present invention provides a gap between the stripe-shaped protrusion 22a and the two side partitions 3 formed on the rear substrate 22 inside the discharge space during discharge of each cell, compared with the prior art or the first embodiment of the present invention. Ultraviolet light and visible light are reflected in the space of the light, and the ultraviolet light and visible light are re-excited the phosphor layer 27 in multiple directions a plurality of times, thereby increasing the excitation amount of the phosphor layer 27, thereby improving the brightness of each cell. The discharge is evenly distributed in the entire discharge space, so that the uniformity of the image displayed in each cell is also improved.

In addition, although the third embodiment of the present invention is not shown in the drawings, as the number of stripe protrusions 22a formed on the rear substrate 22 between each partition 3 increases, the brightness of each cell also increases.

As described above, in the AC color plasma display panel according to the present invention, grooves are formed in the front substrate inside the discharge space of each cell, and grooves or protrusions are selectively formed in the rear substrate, so that the discharge and light emitting regions are enlarged, thereby increasing the brightness of the entire screen. The first and second sustain electrode line pairs are formed on the inner surface of the groove formed on the front substrate to form a low discharge path almost horizontally between the first and second sustain electrode lines, thereby enabling low voltage driving. The uniformity of the displayed image is ensured, and the image quality is improved.

In addition, the present invention is the ultraviolet light and visible light is reflected in the inner space of the groove selectively formed in the back substrate inside the discharge space of each cell, or the space between the protrusions and the two side partitions are also selectively formed when the discharge of each cell In addition, since the visible light causes the phosphor layer to be re-excited many times in various directions, the luminance of the entire screen and the uniformity of the image are improved.

Claims (11)

A plurality of barrier ribs formed on the front and rear substrates, the barrier ribs formed on the rear substrate to maintain a constant distance from the front substrate, and a plurality of address electrode lines formed between the rear substrate and the barrier ribs; A sustain electrode pair formed in parallel with the front substrate in a direction orthogonal to the front substrate; And a groove formed in the front substrate in a direction orthogonal to the partition wall such that the pair of sustain electrodes are positioned inside the groove. The method of claim 1, And stripe-shaped grooves are formed on the back substrates between the partition walls, and the address electrode lines are formed on inner surfaces of the stripe-shaped grooves, respectively. The method of claim 2, And at least one stripe groove is formed on the back substrate between the partition walls. The method according to claim 1, 2 or 3, And each of the stripe grooves is an arc-shaped groove. The method according to claim 1, 2 or 3, And the stripe grooves are rectangular grooves. The method according to claim 1, 2 or 3, And each of the stripe grooves is a triangular groove. The method of claim 1, And stripe-shaped protrusions are formed on the back substrates between the partition walls, and the address electrode lines are formed on the stripe-shaped protrusions, respectively. The method of claim 7, wherein And at least one stripe-shaped protrusion formed on the back substrate between the partition walls. The method according to claim 7 or 8, And wherein each of the stripe-shaped protrusions has a shape of a vertical cross section with respect to the back substrate. The method according to claim 7 or 8, And wherein each of the stripe protrusions has a quadrangular shape of a vertical cross section with respect to the back substrate. The method according to claim 7 or 8, And wherein each of the stripe-shaped protrusions has a triangular shape of a vertical cross section with respect to the back substrate.

Images