KR100667340B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having improved light emission characteristics.

The plasma display panel of the present invention includes red (R), green (G), and blue (B) effective cells, a dummy cell adjacent to the effective cell, a first partition wall that partitions the effective cell, and an effective cell and a dummy cell. And a second partition wall partitioning the groove, a groove is formed on the second partition wall, and a width of the second partition wall is wider than a width of the first partition wall.

Description

Plasma Display Panel

1 is a perspective view showing a conventional plasma display panel.

2 is a diagram illustrating a method of implementing image gradation of a conventional plasma display panel.

3 is a view showing a barrier rib structure of a conventional plasma display panel.

4 illustrates a plasma display panel according to a first embodiment of the present invention.

5 is a diagram illustrating a boundary between an effective cell and a dummy cell of FIG. 4;

6 illustrates a plasma display panel according to a second embodiment of the present invention.

FIG. 7 is a diagram illustrating a boundary between an effective cell and a dummy cell of FIG. 6. FIG.

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having improved light emission characteristics.

In general, a plasma display panel (Plasma Display Panel) is a space between the partition wall formed between the front substrate and the rear substrate made of soda-lime glass, and constitutes one unit cell, and in each cell helium-xenon ( When an inert gas such as He-Xe, He-Ne, or the like is discharged by a high frequency voltage, vacuum ultraviolet rays are generated to emit phosphors formed between the partition walls to implement an image. to be.

1 is a perspective view showing a conventional plasma display panel.

As shown in FIG. 1, in the plasma display panel 100, a front substrate 10, which is a display surface on which an image is displayed, and a rear substrate 20 forming a rear surface are coupled in parallel with a predetermined distance therebetween.

The front substrate 10 has a sustain electrode 11 for maintaining light emission of a cell by mutual discharge in one pixel below, that is, a transparent electrode 11a formed of a transparent ITO material and a bus electrode 11b made of a metal material. The sustain electrodes 11 are formed in pairs. The sustain electrode 11 is covered by a dielectric layer 12a that limits the discharge current and insulates the electrode pairs, and protects the upper surface of the dielectric layer 12a by depositing magnesium oxide (MgO) to facilitate discharge conditions. Layer 13 is formed.

In the rear substrate 20, a plurality of discharge spaces, that is, stripe-type (or well-type) partition walls 21 for forming cells are arranged in parallel with each other and address discharge is performed at an intersection with the sustain electrode 11. A plurality of address electrodes 22 which are performed to generate vacuum ultraviolet rays are arranged in parallel with the partition wall 21. In addition, a dielectric layer 12b is formed on an upper surface of the address electrode 22, and an R, G, and B fluorescent layer 23 that emits visible light for displaying an image upon address discharge is coated on the upper surface of the dielectric layer.

A method of implementing image gradation of a plasma display panel having such a structure is illustrated in FIG. 2.

2 illustrates a method of implementing image gradation of a conventional plasma display panel.

As shown in FIG. 2, the plasma display panel image gray level is driven by dividing one frame into several subfields having different number of emission times, and each subfield has a reset period for discharging uniformly and a discharge cell. It is divided into a sustain period for implementing gradation according to the address period and the number of discharge times to select. For example, when displaying an image with 256 gray levels, a frame period (16.7 ms) corresponding to 1/60 second is divided into eight subfields SF1 to SF8 as shown in FIG. Each of the subfields SF1 to SF8 is divided into a reset period, an address period, and a sustain period. The reset period and the address period of each subfield are the same for each subfield. The address discharge for selecting a cell is caused by the voltage difference between the address electrode as the data electrode and the transparent electrode as the scan electrode. The sustain period is increased at a rate of 2n (n = 0, 1, 2, 3, 4, 5, 6, 7) in each subfield.

On the other hand, the discharge cell of the conventional plasma display panel is usually composed of three kinds of sub-pixels emitting R, G, B, each sub-pixel is implemented by adjusting the amount of light emission according to the number of sustain pulses and visually juxtaposed mixed It will express the color and gradation that you want to make.

3 illustrates a well type partition wall structure of a conventional plasma display panel.

As shown in FIG. 3, the sub-pixels 101a, 101b, and 101c of the conventional plasma display panel are formed with a partition wall 21 for separation of phosphors emitting red (R), green (G), and blue (B). do. The sub-pixels 101a, 101b, and 101c gather together to form one unit discharge cell, and the unit discharge cells are also arranged in a predetermined shape with the unit discharge cells adjacent to the partition wall 21 to represent an image.

In addition, a dummy cell 102 is formed at the outermost part of the discharge cell for convenience in the manufacturing process of the lower substrate.

In the conventional plasma display panel having such a discharge cell structure, the partition wall serves to prevent electrical and optical crosstalk between discharge cells, and is the most important factor in controlling characteristics of display quality and luminous efficiency of the plasma display panel. to be.

However, the plasma display panel having the closed barrier rib structure as shown in FIG. 3 has a problem in that exhaust characteristics are poor as a structure in which the subpixels are trapped in the barrier rib.

In addition, in discharging the impurity gas generated in the discharge space to the outside, there is a problem that the efficiency of the plasma display panel is lowered due to the contaminants accumulated in the exhaust passage.

An object of the present invention is to provide a plasma display panel having improved light emission characteristics by improving the barrier rib structure to improve exhaust characteristics and preventing performance degradation due to contaminants accumulated in the exhaust passage.

A plasma display panel according to the present invention for achieving the above object is a red (R), green (G), blue (B) effective cells, dummy cells adjacent to the effective cells, and the first partition wall partitioning the effective cells And a second partition partitioning the effective cell and the dummy cell, wherein a groove is formed on the second partition and the width of the second partition is wider than the width of the first partition.

The width of the second partition is three times or more and seven times or less the effective cell pitch.

The groove width is 0.1 to 0.7 times the width of the second partition wall.

The grooves are characterized by being biased to the dummy cell.

The depth of the groove is larger than the height of the second partition wall.

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

4 is a diagram illustrating a plasma display panel according to a first embodiment of the present invention, and FIG. 5 is a diagram illustrating a boundary between an effective cell and a dummy cell of FIG. 4.

4 and 5, the plasma display panel according to the first embodiment of the present invention includes a scan electrode 41 and a sustain electrode 42 formed on the upper substrate 40, and a lower substrate 45. Has an address electrode 46 formed thereon.

Each of the scan electrode 41 and the sustain electrode 42 has a line width smaller than the line widths of the transparent electrodes 41a and 42a and the transparent electrodes 41a and 42a and is formed in one edge region of the transparent electrodes 41a and 42a. Bus electrodes 41b and 42b.

The transparent electrodes 41a and 42a are typically formed on the upper substrate 40 by using a transparent material such as indium-tin-oxide.

The metal bus electrodes 41b and 42b are usually formed of metal such as chromium (Cr) and formed on the transparent electrodes 41a and 42a to reduce the voltage drop caused by the transparent electrodes 41a and 42a having high resistance.

In addition, an upper dielectric layer 43 is formed on the upper substrate 40 to limit the discharge current of the scan electrode 41 and the sustain electrode 42, and to insulate the scan electrode 41 and the sustain electrode 42 from each other. The protective film 44 is laminated on the upper dielectric layer 43.

The passivation layer 44 prevents damage to the upper dielectric layer 43 due to sputtering generated during plasma discharge and increases emission efficiency of secondary electrons. As the protective film 44, magnesium oxide (MgO) is usually used.

The lower dielectric layer 47, the red (R), the green (G), and the blue (B) are formed on the lower substrate 45 formed in the direction in which the address electrode 46 intersects the scan electrode 41 and the sustain electrode 42. The first partition wall 48 partitioning the effective cell 401 and the second partition wall 49 partitioning the effective cell 401 and the dummy cell 402 are formed, and the lower dielectric layer 47 and the first partition wall ( 48) The phosphor layer 50 is applied to the surface.

The phosphor layer 50 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 Ne + Xe for discharging is injected into the effective cell 401 formed between the upper and lower substrates 40 and 45 and the first partition wall 48.

Looking at the partition structure of the plasma display panel according to the present invention having such a structure in more detail as follows.

The first partition wall 48 is formed in parallel with the address electrode 46 to prevent the ultraviolet rays and the visible light generated by the discharge from leaking into the adjacent effective cells 401.

The second partition 49 is formed in parallel with the first partition 48 to partition the effective cell 401 and the dummy cell 402.

A stripe type groove 403 is formed on the second partition 49, and the width D2 of the second partition 49 is wider than the width D1 of the first partition 48.

In this way, a second partition 49 having a width wider than the width of the first partition 48 is formed between the effective cell 401 and the dummy cell 402, and a stripe type is formed on the second partition 49. By forming the grooves 403, the impurity gas generated in the discharge space inside the effective cell 401 can be efficiently discharged to the outside, while preventing the contamination of the effective cell 401 due to impurities. .

It is preferable to make the width | variety D2 of such a 2nd partition 49 into 3 times or more and 7 times or less of the effective cell pitch Cp. The width D2 of the second partition wall 49 is set in consideration of the design margin outside the effective cell 401 during the panel lower plate manufacturing process.

It is preferable that the width d1 of the groove 403 formed on the second partition 49 is made 0.1 to 0.7 times the width D2 of the second partition 49. The reason why the width d1 of the groove 403 formed on the second partition 49 is set to 0.1 times or more and 0.7 times less than the width D2 of the second partition 49 is within the effective cell 401. The impurity gas generated in the discharge space of the to efficiently discharge to the outside.

The groove 403 formed on the second partition wall 49 is preferably formed to be biased to the dummy cell 402.

By forming the grooves 403 on the second partition walls 49 so as to deviate from the dummy cells 402, the grooves in which the impurity gas generated in the discharge space inside the effective cell 401 is formed on the second partition walls 49 ( The contaminants accumulated in the process of being discharged to the outside through the 403 are separated from the effective cell 401 as far as possible, thereby preventing the degradation of the emission characteristics of the effective cell 401 due to the contaminants.

As described in detail above, the present invention provides a plasma display panel having improved quality by adjusting the barrier rib structure between the effective cell and the dummy cell to improve exhaust characteristics and to prevent contamination of the effective cell due to impurities.

6 is a diagram illustrating a plasma display panel according to a second embodiment of the present invention, and FIG. 7 is a diagram illustrating a boundary between an effective cell and a dummy cell of FIG. 6.

6 and 7, in the plasma display panel according to the second embodiment of the present invention, the depth h1 of the groove 703 formed on the second partition wall 79 is increased by the second partition wall 79. Its characteristics are that it is formed deeper than the height h2.

Thus, by forming the depth h1 of the groove 703 formed on the second partition wall 79 deeper than the height h2 of the second partition wall 79, the impurity gas in the effective cell 701 can be more efficiently formed. It is discharged to the outside, and contamination of the effective cell 701 due to impurities is also prevented more efficiently.

In the plasma display panel according to the second embodiment of the present invention, the remaining components except for the depth h1 of the groove 703 formed on the second partition wall 79 are the plasma display panel according to the first embodiment of the present invention. The description thereof is the same as that of the plasma display panel according to the first embodiment of the present invention.

As described above, it will be understood by those skilled in the art that the above-described technical configuration may be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

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 following claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from an equivalent concept should be construed as being included in the scope of the present invention.

As described above in detail, the present invention provides a plasma display panel having improved light emission characteristics by improving the barrier rib structure to improve exhaust characteristics and preventing performance degradation due to contaminants accumulated in the exhaust passage.

Claims (5)

Effective cells of red (R), green (G), and blue (B); A dummy cell adjacent to the valid cell; A first partition wall partitioning the effective cell; A second partition wall partitioning the effective cell and the dummy cell; A groove is formed on the second partition wall, and the width of the second partition wall is wider than the width of the first partition wall. The method of claim 1, And the width of the second partition wall is three to seven times greater than the effective cell pitch. The method of claim 1, And the width of the groove is 0.1 to 0.7 times the width of the second partition wall. The method of claim 3, wherein And the groove is formed to face the dummy cell. The method of claim 4, wherein And a depth of the groove is greater than a height of the second partition wall.

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