KR100708532B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel, by forming a discharge cell surrounded by an inclined partition line to increase the phosphor coating area, it is possible to control the brightness of the discharge cell and improve the color temperature.

In addition, the present invention has the effect of adjusting the brightness of the discharge cell by using the area difference or the voltage difference between the scan electrode and the sustain electrode of the discharge cell.

Plasma, panel, bulkhead, slope, brightness, color temperature

Description

 Plasma display panel {Plasma display panel}

1 is a schematic cross-sectional view of a discharge cell of a conventional three-electrode AC surface discharge type plasma display panel.

2A and 2B are photographic views and perspective views illustrating a barrier rib structure of a plasma display according to the related art.

3A and 3B are photographic views and perspective views illustrating another barrier rib structure of the plasma display according to the related art.

4 is a photograph for explaining the delta partition structure of the plasma display according to the prior art

5 is a conceptual diagram illustrating another delta partition structure of a plasma display according to the related art.

6 is a schematic plan view illustrating a barrier rib structure of a plasma display panel according to a first embodiment of the present invention.

FIG. 7 is a schematic plan view illustrating a barrier rib structure of a plasma display panel according to a second exemplary embodiment of the present invention.

FIG. 8 is a schematic plan view illustrating a barrier rib structure of a plasma display panel according to a third exemplary embodiment of the present invention.

Figure 9 is a plan view showing an example of adjusting the brightness of the discharge cells using the inclined partition line in accordance with the present invention

10A and 10B are schematic plan conceptual views illustrating a method of controlling the brightness of a discharge cell according to the present invention.

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

100,101,102,103: bulkhead line

150,151,161,162,163,171,172,173,201,202,203,301,302,303,311,312,313:

Discharge cell

301a, 302a, 303a, 311a, 312a, 313a: Scanning electrode

301b, 302b, 303b, 311b, 312b, 313b: sustain electrode

The present invention relates to a plasma display panel, and more particularly, to form a discharge cell surrounded by an inclined partition line in order to increase the phosphor coating area, thereby controlling the brightness of the discharge cell and improving the color temperature. It is about the panel.

In general, a plasma display panel (hereinafter referred to as a plasma display panel) is composed of discharge cells capable of independently discharging, and independently discharges discharge cells according to an externally applied electrical signal to implement an image.

In addition, the plasma display panel can significantly reduce the thickness and weight compared to the CRT, and has a merit of securing a wide viewing angle compared to an LCD (Liquid Crystal Display).

In addition, the plasma display panel is a device that displays letters and shapes mainly by using visible light emitted by ultraviolet rays generated from glow discharge to stimulate photoluminescence phosphors.

The plasma display panel has two types, a direct current type and an alternating current type, and the alternating current type has excellent luminance and luminance efficiency as compared with the direct current type.

On the other hand, many studies to improve the efficiency of the AC plasma display panel (AC PDP) has been conducted to date.

1 is a cross-sectional view of a discharge cell of a typical three-electrode alternating surface discharge plasma display panel, wherein the discharge cell of the three-electrode alternating surface discharge plasma display panel has an address electrode 11 formed on the lower substrate 10; The lower dielectric layer 12 is formed on the lower substrate 10 to surround the address electrode 11.

The upper substrate 20 is spaced apart from the lower substrate 10 at a predetermined interval.

Based on the drawing of FIG. 1, the main pre-electrode 21 and the sustain electrode 22 spaced apart from each other are formed below the upper substrate 20 described above; Bus electrodes 23a and 23b are formed below each of the scanning electrode 21 and the sustain electrode 22; An upper dielectric layer 24 is formed below the upper substrate 20 to surround the scan electrode 21, the sustain electrode 22, and the bus electrodes 23a and 23b; An MgO film 25 is formed under the upper dielectric film 24.

Here, the address electrode 12 is formed in a direction crossing the scan electrode 21 and the sustain electrode 22.

In addition, the scan electrode 21 and the sustain electrode 22 are typically formed of a transparent electrode such as indium tin oxide (hereinafter, referred to as “ITO”), and the bus electrodes 23a and 23b. A metal such as silver chromium (Cr) is formed on the transparent electrode to reduce the voltage drop caused by the transparent electrode having high resistance.

In addition, the upper dielectric film 24 and the MgO film 25 serving as a protective film accumulate wall charges generated during plasma discharge, and the MgO film 25 is formed of the upper dielectric film 24 by sputtering generated during plasma discharge. It prevents damage and increases the emission efficiency of secondary electrons.

Meanwhile, a lower dielectric layer 12 and a partition wall (not shown) are formed on the lower substrate 10 on which the address electrode 12 is formed, and a phosphor layer is coated on the lower dielectric layer 12 and the partition wall surface.

The barrier rib is formed in parallel with the address electrode 12 to prevent ultraviolet rays and visible light generated by the discharge from leaking to the adjacent discharge cells.

The phosphor layer is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue.

An inert mixed gas such as He + Xe, Ne + Xe and He + Ne + Xe for discharging is injected into the discharge space of the discharge cells existing between the upper and lower substrates 10 and 20 and the partition walls of the panel.

Meanwhile, the barrier rib structure of the conventional AC surface discharge plasma display includes a stripe-type barrier rib 10 shown in FIGS. 2A and 2B and a well-type barrier rib 20 shown in FIGS. 3A and 3B. It is divided into structures.

The barrier rib of the stripe structure described above has the disadvantage of easily exhausting but having a small phosphor coating area, whereas the barrier rib of the well structure has a large coating area of the phosphor and can increase luminance, but has a problem of poor exhaust.

Recently, a Delta (DelTA) bulkhead structure having only the advantages of the two structures has been developed.

FIG. 4 is a photograph for explaining a delta partition structure of a plasma display according to the related art. In this delta partition structure, one cell is surrounded by six surfaces, and an application area of the phosphor is increased, and the reflectance of light is increased in the partition wall. Brightness can be improved, and each discharge cell is connected to a narrow channel to facilitate gas exhaust or injection.

In addition, the barrier rib manufacturing method and driving method are the same as in the related art, and thus, luminance and luminous efficiency may be improved without additional processes.

However, such a delta partition structure has a problem in that gas is leaked to a neighboring discharge cell during discharge and discharged even in a non-discharge region.

FIG. 5 is a conceptual diagram illustrating another delta partition structure of a plasma display according to the related art. Unlike the structure of FIG. 4, the delta partition wall structure is one cell surrounded by four surfaces, which is the same as the structure of FIG. 4. To increase the coating area of the phosphor, to improve the brightness by increasing the reflection of light in the partition wall, and each discharge cell can be discharged and non-discharge independently, it is a structure that can solve the problem of FIG.

However, this delta bulkhead structure has a disadvantage in that the size of the R, G, B discharge cells 31, 32, 33 is the same, and thus there is a limit in increasing the color temperature.

In addition, since all of the barrier rib structures have a rectangular shape of the same size, there is a limit in increasing the phosphor coating area.

In order to solve the above problems, an object of the present invention is to provide a plasma display panel capable of adjusting the brightness of a discharge cell and improving color temperature by implementing a discharge cell including an inclined partition line.

Another object of the present invention is to provide a plasma display panel which can adjust the brightness of a discharge cell by using an area difference or a voltage difference between the scan electrode and the sustain electrode of the discharge cell.

A preferred aspect for achieving the above objects of the present invention,

In the plasma display panel formed with a plurality of discharge cells surrounded by the partition line,

The plurality of discharge cells,

Provided is a plasma display panel comprising at least one discharge cell surrounded by an inclined partition wall line for increasing a phosphor coating area.

Another preferred aspect for achieving the above object of the present invention,

In the plasma display panel formed with a plurality of discharge cells surrounded by the partition line,

Each of the discharge cells,

A cell defined by a quadrilateral shape surrounded by four-sided bulkhead lines.

In the plurality of discharge cells,

A first discharge cell in which two of the four partition walls are inclined;

Comprising a second and third discharge cells horizontally adjacent to the first discharge cell, and having two partition wall lines shared with the first discharge cell, and having a partition line parallel to the two shared partition walls, respectively. Provided is a plasma display panel comprising at least one discharge cell group.

Another preferred aspect for achieving the above object of the present invention,

And a scan electrode and a sustain electrode formed on the upper substrate spaced apart from each other, and an address electrode formed on the lower substrate spaced apart from the upper substrate with a discharge space therebetween and formed to intersect the scan and sustain electrodes. In a plasma display panel in which a plurality of surrounding discharge cells are formed,

Of the plurality of discharge cells,

At least one group consisting of first to third discharge cells having a size of the scan electrode and the sustain electrode of one first discharge cell smaller than that of the scan and sustain electrodes of the second and third discharge cells adjacent to the discharge cell. Provided is a plasma display panel comprising the above.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 6 is a schematic plan view illustrating a barrier rib structure of a plasma display panel according to a first embodiment of the present invention, and is inclined among the barrier rib lines 100 for forming a plurality of discharge cells 150 and 151 in the plasma display panel. When the partition line 102 is formed, the discharge cells 150 for increasing the phosphor coating area and the discharge cells 151 for reducing the phosphor coating area may be formed.

That is, the discharge cell '150' of FIG. 6 has a larger area than the discharge cell '151', and the discharge cell '150' has more phosphor coating than the discharge cell '151', thereby increasing luminance.

Therefore, the barrier rib structure of the plasma display panel of the present invention can control the phosphor coating area for each discharge cell including an inclined barrier rib line.

In order to form the discharge cells for increasing the luminance in the barrier rib structure of the plasma display panel according to the first embodiment of the present invention described above, the discharge cells are formed into quadrilateral barrier rib lines surrounded by four sides, and the four sides thereof. One of the barrier rib lines may be inclined.

Of course, the same applies to the case of forming the discharge cells for reducing the brightness.

FIG. 7 is a schematic plan view illustrating a barrier rib structure of a plasma display panel according to a second exemplary embodiment of the present invention. In the second exemplary embodiment, a plurality of discharge cells defined as quadrilateral barrier ribs surrounded by four barrier rib lines are provided. And at least one discharge cell having a larger phosphor coating area by forming two of four discharge cells inclined to form an inclined surface.

That is, as shown in Figure 7, the discharge cell '162' surrounded by two inclined partition line (102, 103) is relatively larger in area than the adjacent discharge cells '161,163', the amount of phosphor applied, the brightness is high Is increased.

In the figure, '101, 104, 105, 106' is a partition line.

Here, the inclination angle of one of the two inclined partition wall lines 102 and 103 is an acute angle (an angle greater than 0 ° and smaller than 90 °) θ1 and the other partition wall Line 103 is an obtuse angle (angle greater than 90 ° and smaller than 180 °) θ2.

FIG. 8 is a schematic plan view illustrating a barrier rib structure of a plasma display panel according to a third exemplary embodiment of the present invention. In the third exemplary embodiment of the present invention, discharge is defined as a quadrilateral barrier rib surrounded by four barrier rib lines. A plurality of cells are formed, and the plurality of discharge cells include: a first discharge cell 172 in which two partition lines 102 and 103 of four surfaces are inclined; Horizontally adjacent to the first discharge cell 172, and having two partition lines 102 and 103 shared with the first discharge cell 172, parallel to the two shared partition lines 102 and 103, respectively. At least one discharge cell group including the second and third discharge cells 171 and 173 having the partition lines 101 and 104 may be included.

At this time, two partition lines 100A1 and 100B1 other than the two partition lines 102 and 103 shared with the second and third discharge cells 171 and 173 for forming the first discharge cell 172. The width W1 of one of the barrier rib lines 100A1 is two other than the two barrier rib lines 102 and 103 shared with the first discharge cell 172 to form the second and third discharge cells 171 and 173. It is preferable that one of the barrier rib lines 100A2 and 100B2 is smaller than the width W2 of the barrier rib line 100A2.

The inclination angle of one of the two barrier rib lines 102 and 103 sharing the second and third discharge cells 171 and 173 and the first discharge cell 172 is an acute angle (0 °). Larger, smaller than 90 °) ([theta] 1), and another partition line 103 is preferably an obtuse angle (an angle larger than 90 [deg.] And smaller than 180 [deg.]).

In the first to third discharge cells 172, 171, and 173 formed as the inclined partition line as described above, the area of the first discharge cell 172 is smaller than that of the second and third discharge cells 171 and 173, and the phosphor coating area is also small, and the luminance is low. Is also low.

Therefore, the third embodiment of the present invention can also adjust the brightness of the discharge cell by the inclined partition wall.

9 is a plan view showing an example of adjusting the brightness of the discharge cells using the inclined partition line in accordance with the present invention. As described above, the brightness of the discharge cells, R (red), G In the case where the cells are capable of emitting (green) and B (blue) light, when the size of the red light emitting cells is smaller than that of the green and blue light emitting cells, the effect of increasing the color temperature can be obtained.

That is, as shown in FIG. 9, the partition line 100 surrounded by the discharge cells 201, 202, 203 is inclined so that the discharge cells '202, 203' may have a larger area than the discharge cells '201'. When the red light emitting cells are discharge cells '202,203' and the green and blue light emitting cells, the effect of increasing the color temperature is obtained.

Meanwhile, in FIG. 8, the plurality of discharge cells is formed of cells capable of emitting R (red), G (green), and B (blue), and the first discharge cell is a red light emitting cell. The second discharge cell is a green light emitting discharge cell, and when the third discharge cell is formed of a blue light emitting discharge cell, the above-described color temperature is increased.

10A and 10B are schematic plan views for explaining a method of adjusting the brightness of a discharge cell according to the present invention. Here, the brightness is controlled by the size of the scan electrode and the sustain electrode located in the discharge cell.

In other words, the discharge cells having larger sizes of the scan electrodes and sustain electrodes have higher discharge energy than those of the smaller discharge cells, thereby increasing the luminance.

Therefore, adjusting the luminance to the size of the scan electrode and the sustain electrode is formed on the scan electrode and the sustain electrode formed on the upper substrate spaced apart from each other, and the lower substrate spaced apart from the upper substrate with a discharge space. A plasma display panel including an address electrode formed to intersect an electrode, and having a plurality of discharge cells surrounded by a partition line, wherein the scan electrode and the sustain electrode of one of the plurality of discharge cells are formed. The plasma display panel may include at least one group consisting of first to third discharge cells each having a size smaller than the scan electrodes and sustain electrodes of the second and third discharge cells adjacent to the discharge cells. .

As shown in FIG. 10A, the size of the scan electrode 301a and the sustain electrode 301b of the discharge cell 301 is determined by the scan electrodes 302a and 303a and the sustain electrodes 302b and 303b of the discharge cells 302 and 303. If formed smaller than the size, the brightness of the discharge cells can be adjusted.

As shown in FIG. 10B, the area difference between the discharge cells is generated by the inclined partition line, and the size difference between the scan electrode and the sustain electrode is formed to adjust the brightness of the discharge cell.

Similarly, in FIG. 10B, the discharge cells '311' have a smaller area than the discharge cells '312,313', and the scan electrodes 311a and sustain electrodes 311b of the discharge cells '311' have the sizes of the scan electrodes of the discharge cells '312,313'. Since the size of the 312a and 313a and the sustain electrodes 312b and 313b is smaller than that of the discharge cells 311 and 313b, the brightness of the discharge cells 311 and 313b is smaller than that of the discharge cells 312 and 313.

Although not shown in the drawing, the luminance of each discharge cell can be adjusted by varying the voltage difference applied between the sustain electrode and the scan electrode for each discharge cell.

The discharge cell '311' has a smaller area than the discharge cells '312,313', and the size of the scan electrodes 311a and sustain electrodes 311b of the discharge cells '311' and the scan electrodes 312a and 313a of the discharge cells '312 and 313'. Since the size of the sustain electrodes 312b and 313b is smaller than that of the sustain cells 312b and 313b, the luminance of the discharge cells 311 and 313b is smaller than that of the discharge cells 312 and 313.

As described above, the present invention forms an discharge cell surrounded by an inclined partition line in order to increase the phosphor coating area, thereby controlling the brightness of the discharge cell and improving the color temperature.

In addition, the present invention has the effect of adjusting the brightness of the discharge cell by using the area difference or the voltage difference between the scan electrode and the sustain electrode of the discharge cell.

Although the invention has been described in detail only with respect to specific examples, it will be apparent to those skilled in the art that various modifications and variations are possible within the spirit of the invention, and such modifications and variations belong to the appended claims.

Claims (10)

In the plasma display panel formed with a plurality of discharge cells surrounded by the partition line, The plurality of discharge cells, At least one discharge cell surrounded by the inclined partition line to increase the phosphor coating area is included, Each discharge cell is formed of a rectangular partition wall line surrounded by four sides, The discharge cell including the inclined partition line, Plasma display panel, characterized in that one or two of the partition wall line of the four surfaces are inclined. delete The method of claim 1, Of the two inclined bulkhead line, The inclination angle of one bulkhead line is an acute angle, And another partition wall line is an obtuse angle. In the plasma display panel formed with a plurality of discharge cells surrounded by the partition line, Each of the discharge cells, A cell defined by a quadrilateral shape surrounded by four-sided bulkhead lines. In the plurality of discharge cells, A first discharge cell in which two of the four partition walls are inclined; Comprising a second and third discharge cells horizontally adjacent to the first discharge cell, and having two partition wall lines shared with the first discharge cell, and having a partition line parallel to the two shared partition walls, respectively. And at least one discharge cell group. The method of claim 4, wherein The partition line width W1 of one of two partition lines other than the two partition lines shared with the second and third discharge cells for forming the first discharge cell is A plasma display smaller than one of the partition line widths W2 of the two partition lines other than the two partition lines shared with the first discharge cell for forming the second and third discharge cells. panel. The method according to claim 4 or 5, The inclination angle of one of the two partition wall lines sharing the first and second discharge cells with the second and third discharge cells is an acute angle, And another partition wall line is an obtuse angle. The method according to claim 4 or 5, The plurality of discharge cells, It consists of cells that can emit R (red), G (green), B (blue), The first discharge cell is a red light emitting cell, The second discharge cell is a green light emitting discharge cell, And said third discharge cell is a blue light emitting cell. And a scan electrode and a sustain electrode formed on the upper substrate spaced apart from each other, and an address electrode formed on the lower substrate spaced apart from the upper substrate with a discharge space therebetween and formed to intersect the scan and sustain electrodes. In a plasma display panel in which a plurality of surrounding discharge cells are formed, Of the plurality of discharge cells, At least one group consisting of first to third discharge cells having a size of the scan electrode and the sustain electrode of one first discharge cell smaller than that of the scan and sustain electrodes of the second and third discharge cells adjacent to the discharge cell. Plasma display panel characterized in that it is included above. The method of claim 8, The first to third discharge cells are formed by adjusting the area of each of the inclined partition line, The area of the first discharge cell, And a plasma display panel smaller than the area of the second and third discharge cells. The method according to claim 8 or 9, The voltage difference applied to the scan electrode and the sustain electrode of the first discharge cell, And a voltage difference applied to the scan electrodes and sustain electrodes of the second and third discharge cells.

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