KR100416085B1 - Plasma display panel enhancing the blue color illuminating property - Google Patents

Abstract

A plasma display device having a plurality of discharge spaces partitioned by partition walls, a phosphor layer formed in the discharge spaces, and discharge means for exciting the phosphor layer, wherein the phosphor layers formed in the discharge spaces partitioned by the partition walls are pure. Books are formed in the order of red (R), green (G), blue (B), and blue (B), and the fluorescent layers of blue (B) and blue (B) emit light simultaneously. The present invention discloses a device.

Description

Plasma display panel with improved blue color brightness {Plasma display panel enhancing the blue color illuminating property}

The present invention relates to a plasma display device, and more particularly, to a plasma display device having an improved blue luminance.

Plasma display panels are used to encapsulate a gas on two substrates coated with a plurality of electrodes, apply a discharge voltage, and excite a phosphor formed in a predetermined pattern by ultraviolet rays generated by the discharge voltage. A device that obtains numbers, letters or graphics.

Such a plasma display device is classified into a direct current type and an alternating current type according to a type of a driving voltage applied to a discharge cell, for example, a discharge type, and can be classified into a counter discharge type and a surface discharge type according to the configuration of the electrodes.

The direct current plasma display device is a structure in which all electrodes are exposed to a discharge space, and charge is directly transferred between corresponding electrodes. In an AC plasma display device, at least one electrode is surrounded by a dielectric layer, and discharge is performed by an electric field of wall charge instead of direct charge transfer between corresponding electrodes.

An example of the surface discharge type plasma display device of the plasma display device is shown in FIG. 1.

Referring to the drawings, a plasma display device includes a back substrate 10 and a substrate 10 on which the first electrodes 11 are formed in a predetermined pattern on the back substrate 10 and the first electrodes 11 are formed. The dielectric layer 12 formed thereon is formed. On the dielectric layer 12, barrier ribs 13 are formed to maintain a discharge distance and to prevent electro-optical cross talk between cells.

The front substrate is coupled to the rear substrate 10 on which the partition 13 is formed, and the second electrodes 14 and the third electrodes 15 of a predetermined pattern are formed on the lower surface of the second substrate 14 so as to be orthogonal to the first electrode 11. (16) is provided. The second and third electrodes 14 and 15 are made of a transparent electrode, and a bus electrode 17 for reducing line resistance of the transparent electrode is formed on the upper surface of the second and third electrodes 14 and 15 in a narrower width than the transparent electrode. A dielectric layer 19 in which electrodes are embedded is formed on the bottom surface of the front substrate 16. The phosphor layer 180 is formed on at least one side of the discharge space partitioned by the partition wall 13.

Here, the phosphor layer 180 is formed on a discharge space in which red (R), green (G), and blue (B) are partitioned by the partition wall 13 in order. That is, referring to FIG. 1, reference numerals 181, 182, 183, 181 ', and 182' sequentially indicate red (R), green (G), blue (B), and again red (R), green (G), A fluorescent layer is formed as blue (B). Here, the fluorescent layers 181, 182, and 183 of red (R), green (G), and blue (B) all emit light to form white.

The plasma display device configured as described above is driven separately from the address driving and the sustain driving. In the address driving, the wall charge is generated by the trigger discharge by applying a voltage to the first electrode 11 and the second electrode 14. It is charged and the same voltage is applied to the sustain driving second electrode 14 and the selected third electrode 15. As described above, as voltage is applied to the first and second electrodes 11 and 14, glow discharge occurs, and the phosphor 180 is excited by ultraviolet rays generated during the glow discharge, thereby forming an image.

However, in such a plasma display device of the related art, the blue fluorescent material has a problem inferior to the red and green fluorescent materials having different luminance. In addition, the blue fluorescent material has a shorter lifetime than other red and green fluorescent materials, thereby shortening the lifetime of the plasma display device as a whole.

The present invention has been made to solve the above problem. Accordingly, it is an object of the present invention to provide a plasma display device with improved blue luminance. It is still another object of the present invention to provide such a plasma display device in which the blue phosphor increases its lifespan and eventually extends the lifespan of the plasma display device.

The plasma display device according to the present invention is characterized in that the phosphor layers formed in the discharge spaces between the partition walls are sequentially formed in the order of red (R), green (G), blue (B), and blue (B). do. Here, the blue (B) and blue (B) phosphor layers are electrically connected to the address electrodes corresponding to the blue (B) and blue (B) structures in order to simultaneously emit light. Here, the partition wall partitioning the discharge space in which the blue (B) and blue (B) phosphor layers are formed is formed to have a height lower than that of the partition wall partitioning the other red (R) or green (G) phosphor layer. Can be. Furthermore, in the plasma display device according to the present invention, blue phosphors may be applied to an upper portion of a partition wall forming a discharge space where the blue (B) and blue (B) phosphor layers are formed.

In the plasma display device according to the present invention, the phosphor layer is formed in order of red (R), green (G), blue (B), and blue (B) in order between the partition walls forming the discharge space, and the electrode. Since the address electrodes corresponding to the blue (B) and the blue (B) are electrically connected to each other in the panel structure, excitation due to the discharge of the blue phosphor layer in the plasma display device is caused by two blue (B) and blue (B) phosphors. Occur simultaneously in the layer and thus the luminance of the blue is improved. Further, when the partition wall partitioning the discharge space in which the blue (B) and blue (B) phosphor layers are formed is formed lower than the partition wall partitioning the other red (R) or green (G) phosphor layer. These blue (B) and blue (B) phosphor layers are mutually reinforcement to further improve the blue luminance. In the plasma display device according to the present invention, the blue phosphor layer is excited when a blue phosphor layer is applied to an upper part of a partition wall forming a discharge space in which the blue (B) and blue (B) phosphor layers are formed. The blue light emitted to the display portion has a stronger luminance as it passes through the phosphor layer applied on the partition wall.

1 is a perspective view showing an example of a conventional plasma display device;

2 is an exploded perspective view of a plasma display device according to an embodiment of the present invention;

3 is a cross-sectional view taken along line 3-3 of FIG. 2;

4 is a cross-sectional view showing another embodiment of the present invention; And

5 is a cross-sectional view showing another embodiment of the present invention.

<Brief description of symbols for the main parts of the drawings>

10: lower substrate 16: upper substrate 130: partition wall

133, 135, and 137: partition walls forming discharge spaces for forming phosphor layers of blue (B) and blue (B).

135: barrier rib partitioning a discharge space in which blue (B) and blue (B) phosphor layers are formed.

381: red (R) phosphor layer 382: green (G) phosphor layer

383 and 384: blue (B) phosphor layers

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

2 shows an example of a plasma display device according to the present invention. As shown in the drawing, the front substrate 16 has second and third electrodes 14 and 15 corresponding to the scan electrodes and the sustain electrodes, and a dielectric layer 19 surrounding them. In addition, a second electrode 14, which is the scan electrode, and a first electrode 11, which is an address electrode causing address discharge, are formed on the lower substrate 10, and a dielectric layer 12 surrounding the address electrode 11 is formed thereon. A plurality of barrier ribs 130 are formed on the upper surface thereof to maintain the discharge distance and to prevent the electro-optical cross talk between the cells. A phosphor layer is formed in the space between the barrier ribs 130 forming the discharge space.

According to a feature of the present invention, the phosphor layers formed in the spaces between the barrier ribs 130 are sequentially formed in the order of red (R), green (G), blue (B), and blue (B). Referring to FIG. 3, which is a cross-sectional view taken along a line 3-3 of FIG. 2, the phosphor layers formed in the discharge spaces between the partition walls 130 include red (R) 381, green (G) 382, and blue. It can be seen that they are repeatedly arranged in the order of (B) 383 and blue (B) 384. In addition, the address electrodes 110 and 120 corresponding to the phosphor layers of the blue (B) 383 and the blue (B) 384 are electrically connected to each other on the electrode pattern.

Therefore, after the first address discharge of the first electrode 11 and the second electrode 14, the excitation of the phosphor layer of blue (B) is reduced when the second discharge of the second electrode 14 and the third electrode 15 occurs. This occurs simultaneously in the blue (B) phosphor layers 383 and 384, whereby the luminance of blue is improved.

According to the present invention, red (R) 381, green (G) 382, blue (B) 383, and blue (B) 384 in the space between the partitions 130 repeatedly. The phosphor layer is arranged. Here, the partition wall partitioning the discharge space in which the fluorescent layer of blue (B) 383 and blue (B) 384 is formed is larger than the partition wall partitioning another fluorescent layer of red (R) or green (G). It is desirable to form the height low. Then, the phosphor layers of blue (B) and blue (B) are mutually reinforcement to further improve the luminance of the blue. This structure is shown in FIG. The partition walls 135 partitioning the phosphor layers of blue (B) 383 and blue (B) 384 are larger than the partition walls 133 and 137 partitioning the phosphor layers of other red (R) or green (G). It can be seen that it is formed low. In other words, the two blue phosphor layers 383 and 384 can mutually reinforce the structure. That is, the excitation light of the two blue phosphor layers 383 and 384 due to the ultraviolet rays emitted during the discharge may be mutually reinforced. As a result, the blue luminance of the plasma display device is further improved.

In the plasma display device according to the present invention, it is preferable to apply a blue phosphor layer on top of a partition wall forming a discharge space in which the blue (B) and blue (B) phosphor layers 383 and 384 are formed. That is, referring to FIG. 5, barrier ribs 133, 135, and 137 forming discharge spaces in which phosphor layers of blue (B) and blue (B) are formed are shown. That is, the phosphor layers 383 and 384 of blue (B) and blue (B) are formed in two spaces formed by the partitions 133, 135, and 137. At this time, a blue (B) phosphor layer 388 is coated on the partitions 133, 135, and 137. Then, blue light emitted by the blue phosphor layer to be emitted to the display portion has a stronger luminance as it passes through the phosphor layer coated on the partition wall.

As described above, in the plasma display device, the phosphors formed in the discharge spaces formed between the partition walls are sequentially arranged in the order of red (R), green (G), blue (B), and blue (B). The blue luminance is greatly improved. In addition, since two blue phosphor layers are formed, deterioration of the blue phosphor layer is relatively small, and thus, the lifetime of the plasma display device may be extended.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (3)

A plasma display device comprising a plurality of discharge spaces partitioned by partition walls, a phosphor layer formed in the discharge space, and discharge means for exciting the phosphor layer. The phosphor layer formed in the discharge space partitioned by the partition wall is formed in the order of red (R), green (G), blue (B), and blue (B) in order, and the blue (B) and blue (B). Phosphor layer) simultaneously emits light, The partition wall partitioning the discharge space in which the blue (B) and blue (B) phosphor layers are formed is formed lower than the partition wall partitioning the phosphor layer of another red (R) or green (G), And a blue phosphor is coated on an upper part of a partition wall forming a discharge space in which the blue (B) and blue (B) phosphor layers are formed. delete delete