KR100562891B1 - Plasma Display Panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having improved brightness and efficiency of displaying an image.

The plasma display panel according to the present invention includes a unit discharge cell composed of R, G, and B subpixels partitioned by barrier ribs, wherein the R, G, and B subpixels each have a horizontal auxiliary barrier rib. It is divided into first and second auxiliary subpixels, and the bus electrode for the scan electrode and the sustain electrode are formed on the first and second auxiliary subpixels, respectively.

According to the present invention, by reducing the cross-sectional area of the bus electrode required in the ITO-less structure and increasing the phosphor coating area, the brightness of the plasma display panel is improved, thereby improving the efficiency of displaying an image.

Description

Plasma Display Panel             

1 is a perspective view schematically showing a device structure of a plasma display panel.

2 is a view showing the structure of the ITO electrode and the bus electrode according to the prior art.

3A and 3B show an ITO-less structure according to the prior art.

4 is a schematic view of a plasma display panel according to an embodiment of the present invention.

5A is a diagram illustrating in detail a unit discharge cell structure of a plasma display panel according to an exemplary embodiment of the present invention.
5B schematically illustrates a plasma display panel according to a modified embodiment of the present invention.

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having improved brightness and efficiency of displaying an image.

In general, a plasma display panel (hereinafter, referred to as a PDP) has a partition wall formed between a front glass and a back glass of soda-lime glass, and constitutes one unit cell. When an inert gas such as helium-xenon (He-Xe) or helium-neon (He-Ne) is discharged by a high frequency voltage, vacuum ultraviolet rays are generated to emit phosphors formed between the partition walls It is a device to implement. Such PDPs are attracting attention as next-generation display devices because they are easy to manufacture due to their simple structure, thin in appearance, and have low power consumption.

1 is a perspective view schematically showing a device structure of a conventional PDP. As shown in the PDP 100, the front glass 10, which is the display surface on which an image is displayed, and the rear glass 20 forming the rear surface are coupled in parallel with a predetermined distance therebetween. The front glass 10 is made of a scan electrode 11Y and a sustain electrode 11X, that is, a transparent electrode 11a formed of a transparent ITO material and a metal material to mutually discharge one pixel downward and maintain light emission of the cell. The scan electrode 11Y and the sustain electrode 11X provided as the bus electrode 11b are formed in pairs.

The scan electrode 11Y and the sustain electrode 11X are covered by a dielectric 12 that limits the discharge current and insulates the electrode pairs, and the upper surface of the dielectric 12 has magnesium oxide (M) to facilitate the discharge condition. A protective layer 13 on which MgO) is deposited is formed. The back glass 20 has a plurality of discharge spaces, that is, a stripe type (or well type) partition wall 21 for forming a cell is arranged in parallel to the address discharge at the site intersecting the sustain electrode 11X. A plurality of address electrodes 22, which are performed to generate vacuum ultraviolet rays, are disposed in parallel to the partition wall 21.

In addition, the upper surface of the rear glass is coated with R, G, and B phosphors 23 which emit visible light for image display upon address discharge, and absorb and reflect external light generated outside the front glass 10 on the upper surface of the partition wall. The black matrix 21a having a function of blocking light and improving the color purity and contrast of the front glass 10 is arranged.

On the other hand, Figure 2 shows a top plate structure of a conventional AC surface discharge PDP (100), which will be described in detail with reference to Figure 1, transparent in the direction crossing the R, G, B discharge cells divided by the partition wall (21) The bus electrode 11b is formed on the ITO electrode 11a which is an electrode, and the dielectric 12 forms the structure on which MgO13 was formed on it again.

Therefore, for such a structure, an ITO patterning process is essential, and the formation of the ITO pattern has a great influence on the discharge efficiency. However, when problems such as misalignment of ITO and cutting of ITO occur, discharge characteristics may be lowered and discharge efficiency may be reduced, and labor cost and material cost improvement due to ITO formation may also lower the price competitiveness of PDP.

Therefore, although ITO-less technique is currently being removed from the ITO formation process, problems such as deterioration in luminance and efficiency reduction remain to be solved.

3A and 3B illustrate an ITO-less structure according to the related art, which will be described with reference to FIG. 1, in the related art, a bus electrode 11b for forming a discharge is in the discharge space 23 or a partition wall altogether ( 21), but in the case of the former, since the discharge formation effective cross-sectional area of the bus electrode 11b is required in order to have a shape in which the bus electrode 11b for forming the discharge is located in the discharge space, 4 to 6 Since there are two bus electrodes 11b, the transmittance is lowered and luminance is inevitably reduced. In the latter case, the gap Gap between the bus electrodes 11b is too wide to cause an increase in the discharge start voltage and the sustain voltage. A problem occurred.

The present invention is to solve the above problems, by forming a horizontal partition wall in the existing discharge cell by dividing the portion where the discharge is formed in one discharge cell into two parts to form a discharge problem in the existing ITO-less structure To reduce the effective cross-sectional area of the discharge electrode and to reduce the effective cross-sectional area of the bus electrodes, the transverse bulkhead increases the surface area of the phosphor to improve the ITO-less structure, reducing the luminance, and providing a wide color display. There is a purpose.

A plasma display panel according to the present invention for achieving the above object comprises a unit discharge cell consisting of R, G, B subpixels partitioned by a partition wall, wherein the R, G, B subpixels are each The first and second auxiliary subpixels may be divided by the horizontal auxiliary barrier ribs, and the bus electrodes for the scan electrodes and the bus electrodes for the sustain electrodes may be formed on the first and second auxiliary subpixels, respectively.
The bus electrode for the scan electrode on the first auxiliary subpixel is electrically connected to the bus electrode for the scan electrode on the second auxiliary subpixel, and the bus electrode for the sustain electrode on the first auxiliary subpixel is for the sustain electrode on the second auxiliary subpixel. It is characterized in that the electrical connection with the bus electrode.

delete

The bus electrode for the scan electrode on the first auxiliary subpixel is electrically separated from the bus electrode for the scan electrode on the second auxiliary subpixel, and the bus electrode for the sustain electrode on the first auxiliary subpixel is used for the sustain electrode on the second auxiliary subpixel. Characterized in that electrically separated from the bus electrode.

Hereinafter, exemplary embodiments of the plasma display panel according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a schematic view of a plasma display panel according to an embodiment of the present invention.
As shown in FIG. 4, the plasma display panel according to an exemplary embodiment of the present invention includes a unit discharge cell 400 including R, G, and B subpixels partitioned by the partition wall 21. The G and B subpixels are divided into first and second auxiliary subpixels by horizontal auxiliary partitions 41, respectively, and bus electrodes 42Y1 and 42Y2 for scan electrodes are disposed on the first and second auxiliary subpixels, respectively. And the sustain electrode bus electrodes 43Z1 and 43Z2.
This will be described in more detail with reference to FIG. 5A.
5A is a diagram illustrating in detail the structure of a unit discharge cell 400 of a plasma display panel according to an exemplary embodiment.
As shown in FIG. 5A, the unit discharge cells 400 of the plasma display panel according to the exemplary embodiment of the present invention are R, G, and B subpixels 400 R, 400 G, and 400 B coated with R, G, and B phosphors, respectively. ) Is a combination of
In addition, each of the R, G, and B subpixels 400R, 400G, and 400B has a first auxiliary subpixel 400R1, 400G1, 400B1 and a second auxiliary subpixel 400R2, 400G2 by a horizontal auxiliary partition 41. 400B2).
At this time, a step is placed in the shape of the auxiliary partition wall 41, that is, the auxiliary partition wall 41 is inclined, and the phosphor is coated on the auxiliary partition wall 41 to increase the phosphor coating area.
In addition, on each of the first auxiliary subpixels 400R1, 400G1, and 400B1, the first sustain electrode bus electrode 42Y1 and the first scan electrode bus electrode 42Y1 are arranged in parallel with the first scan electrode bus electrode 42Y1. 42Z1 is formed to form the first auxiliary subpixels 400R1, 400G1, and 400B1 by using driving voltages applied to the first scan electrode bus electrode 42Y1 and the first sustain electrode bus electrode 42Z1. Discharge occurs for displaying an image.
Further, on each of the second auxiliary subpixels 400R2, 400G2, and 400B2, a bus electrode for the second sustain electrode in a direction parallel to the second scan electrode bus electrode 42Y2 and the second scan electrode bus electrode 42Y2 is formed. 42Z2 is formed, and inside each second auxiliary subpixel 400R2, 400G2, 400B2 using a driving voltage applied to the second scan electrode bus electrode 42Y2 and the second sustain electrode bus electrode 42Z2. Discharge occurs for displaying an image.
In the plasma display panel according to the exemplary embodiment of the present invention, the R, G, and B subpixels 400R, 400G, and 400B constituting the unit discharge cell 400 are lateral in comparison with the conventional case. The subdivision is divided up and down by the auxiliary partition 41 of the difference, and the difference is that the discharge for the image display independently occurs in each of the divided sub-pixels (400R1, 400R2, 400G1, 400G2, 400B1, 400B2) have.
In addition, the R, G, and B subpixels 400R, 400G, and 400B are divided into the auxiliary partition walls 41, and each of the divided subpixels 400R1, 400R2, 400G1, 400G2, 400B1, 400B2 is divided into two. The first scan electrode bus electrode 42Y1 and the first sustain electrode bus electrode 43Z1 are formed on the bus electrode, that is, the first auxiliary subpixel 400R1, 400G1, 400B1, and the second auxiliary subpixel 400R2, By forming the second scan electrode bus electrode 42Y2 and the second sustain electrode bus electrode 43Z2 in 400G2 and 400B2, the distance between the bus electrodes formed in each sub-pixel is reduced, that is, the first scan electrode. By reducing the distance between the bus electrode 42Y1 for the first sustain electrode and the bus electrode 43Z1 for the first sustain electrode, and reducing the distance between the bus electrode 42Y2 for the second scan electrode and the bus electrode 43Z2 for the second sustain electrode, The driving start voltage is secured by reducing the discharge start voltage at each auxiliary subpixel.
In addition, the effective cross-sectional area of the bus electrodes required to generate a discharge in each of the R, G, B subpixels 400R, 400G, 400B, based on the R, G, B subpixels 400R, 400G, 400B. This decreases as compared with the conventional case, and the luminance and luminous efficiency of the plasma display panel are improved.
In addition, the coating area of the phosphor was increased based on each of the R, G, and B subpixels 400R, 400G, and 400B due to the phosphor applied to the auxiliary partition wall 41 in the horizontal direction.
Meanwhile, the scan electrode bus electrode 42Y1 on the first auxiliary subpixel 400R1, 400G1, 400B1 is electrically connected to the scan electrode bus electrode 42Y2 on the second auxiliary subpixel 400R2, 400G, 400B2. The sustain electrode bus electrode 43Z1 on the first auxiliary subpixel 400R1, 400G1, 400B1 is electrically connected to the sustain electrode bus electrode 43Z2 on the second auxiliary subpixel 400R2, 400G2, 400B2. It is preferable. In this way, the bus electrode 42Y1 for the scan electrodes on the first auxiliary subpixels 400R1, 400G1, 400B1 and the bus electrode 42Y2 for the scan electrodes on the second auxiliary subpixels 400R2, 400G, 400B2 are driven. Bus electrodes 43Z1 for sustain electrodes on the first auxiliary subpixels 400R1, 400G1, 400B1 and bus electrodes for sustain electrodes on the second auxiliary subpixels 400R2, 400G2, 400B2. Drive elements for driving 43Z2) may be commonly used.
Meanwhile, the bus electrode 42Y1 for the scan electrode on the first auxiliary subpixel 400R1, 400G1, 400B1 is electrically separated from the bus electrode 42Y2 for the scan electrode on the second auxiliary subpixel 400R2, 400G, 400B2. The sustain electrode bus electrode 43Z1 on the first auxiliary subpixel 400R1, 400G1, 400B1 is electrically separated from the sustain electrode bus electrode 43Z2 on the second auxiliary subpixel 400R2, 400G2, 400B2. desirable. In this way, the first auxiliary subpixels 400R1, 400G1, and 400B1 are driven by separating the first auxiliary subpixels 400R1, 400G1 and 400B1 and the second auxiliary subpixels 400R2, 400G2 and 400B2. By varying the intensity of the discharge in the 400B1) and the second sub-pixels 400R2, 400G2, and 400B2, more various color expressions are possible.

delete

delete

delete

As described in detail above, the plasma display panel according to the embodiment of the present invention reduces the cross-sectional area of the bus electrode required in the ITO-less structure, increases the phosphor coating area, and improves brightness, thereby improving the efficiency of displaying an image. Improve.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. 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 appended claims rather than the foregoing description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described in detail above, the present invention provides a plasma display panel having improved efficiency of displaying an image by reducing the cross-sectional area of the bus electrode required in the ITO-less structure, increasing the phosphor coating area, and improving luminance.

Claims (3)

A plasma display panel comprising unit discharge cells composed of R, G, and B subpixels partitioned by partition walls, The R, G, and B subpixels are divided into first and second auxiliary subpixels by horizontal auxiliary partitions, respectively. And a scan electrode bus electrode and a sustain electrode bus electrode respectively formed on the first and second auxiliary subpixels. The method of claim 1, A scan electrode bus electrode on the first auxiliary subpixel is electrically connected to a scan electrode bus electrode on the second auxiliary subpixel, And the sustain electrode bus electrode on the first auxiliary subpixel is electrically connected to the sustain electrode bus electrode on the second auxiliary subpixel. The method of claim 1, A scan electrode bus electrode on the first auxiliary subpixel is electrically separated from the scan electrode bus electrode on the second auxiliary subpixel, And the sustain electrode bus electrode on the first auxiliary subpixel is electrically separated from the sustain electrode bus electrode on the second auxiliary subpixel.

Images