KR100444513B1 - Radio Frequency Plasma Display Panel - Google Patents

Abstract

The present invention relates to a high frequency plasma display panel in which light emission efficiency and luminance can be improved by changing the discharge cell arrangement by the partition structure to increase the light emitting area.

The high frequency plasma display panel of the present invention is formed on an upper substrate, a high frequency electrode to which a high frequency signal is supplied, a partition wall formed so that a plurality of discharge cells arranged adjacently up and down are arranged in a delta type structure, and on a lower substrate. An address electrode formed, a first dielectric layer formed on the front surface of the lower substrate to cover the address electrode, a scan electrode formed on the first dielectric layer so as to be orthogonal to the address electrode, and a front surface of the lower substrate covered the scan electrode. And a second dielectric layer formed, a protective film formed on the second dielectric layer, and a phosphor formed on the inner wall of the partition wall.

In the high frequency plasma display panel according to the present invention, the discharge cell arrangement is changed to a delta structure and the discharge cell structure is configured to have a rectangular or honeycomb shape, thereby increasing the width of the discharge cell. Accordingly, the high-frequency plasma display panel such as a high resolution can lower the frequency of the high-frequency signal for generating sustain discharge, and can greatly improve the luminous efficiency due to the increase in the light emitting area caused by the sustain discharge.

Description

High Frequency Plasma Display Panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency plasma display panel, and more particularly, to a high frequency plasma display panel in which light emission efficiency and brightness can be improved by changing a discharge cell arrangement by a partition structure to increase a light emitting area.

Plasma Display Panel (hereinafter referred to as "PDP") is a display device in which ultraviolet light generated by gas discharge excites a phosphor to generate visible light from the phosphor. PDP has the advantages of being thin, light, high-definition large screen, and a wide viewing angle, compared to Cathode Ray Tube (CRT), which has been the dominant display device. In recent years, research has been actively conducted on a radio frequency (“RF”) PDP that can significantly improve discharge efficiency and brightness compared to an AC surface discharge PDP developed in the past. In the RF PDP, electrons vibrating in the discharge space of the discharge cell by the high frequency signal continuously ionize the discharge gas, thereby causing continuous discharge for most of the discharge time. In the PDP, the discharge cells forming the pixel unit are arranged in a matrix to form the entire screen.

1 is a perspective view illustrating a structure of a high frequency plasma display panel according to the related art, and FIG. 2 is a longitudinal cross-sectional view of a panel showing a discharge cell structure of the high frequency plasma display panel shown in FIG. 1.

1 and 2, the RF PDP includes an address electrode 18 formed on the lower substrate 16, a first dielectric layer 20 formed on the lower substrate 16 and the address electrode 18, and an address. The scan electrode 22 formed on the first dielectric layer 20 so as to be orthogonal to the electrode 18, the second dielectric layer 24 formed on the first dielectric layer 20 and the scan electrode 22, and the second dielectric layer ( A protective film 26 formed on the protective film 26, a partition wall 28 vertically formed on the protective film 26 to distinguish respective discharge cells, a phosphor 30 coated on an inner wall of the partition wall 28, and a partition wall. An upper substrate 10 disposed in parallel with the lower substrate 16 with the 28 interposed therebetween, a high frequency electrode 12 formed on the rear surface of the upper substrate 10 in a direction parallel to the scan electrode 22, and a high frequency An upper dielectric layer 14 formed on the upper substrate 10 having the electrode 12 formed thereon, and a discharge space 32 formed by surrounding the upper substrate 10, the lower substrate 16, and the partition wall 28. In addition, the auxiliary electrode 19 is formed to be electrically connected to the address electrode 18 in the vicinity of the region where the scan electrode 22 and the address electrode 18 cross each other, and has an auxiliary electrode 19 formed at the same height as the scan electrode 22. .

As a result, the data pulse applied to the address electrode 18 during the address discharge is equally applied to the auxiliary electrode 19. Since the thickness of the dielectric layer is thin on the auxiliary electrode 19, the voltage drop in the dielectric layer during the address discharge is small, so that most of the driving voltage supplied to the auxiliary electrode 19 is applied to the discharge space 32. Thus, address discharge is generated between the auxiliary electrode 19 and the scan electrode 22 connected to the address electrode 18. As a result, since the address discharge field is intensively formed only in the region between the auxiliary electrode 19 and the scan electrode 22, crosstalk between adjacent discharge cells is prevented and discharge uniformity is improved.

Data pulses and scan pulses are applied to the address electrode 18 and the scan electrode 22 to cause address discharge, respectively. The first dielectric layer 20 insulates the address electrode 18 and the scan electrode 22. In the second dielectric layer 24, wall charges are accumulated during address discharge. The protective film 26 protects the dielectric layers 20 and 24 from sputtering during discharge to extend the life of the discharge cell, and also generates secondary electrons during discharge to improve discharge efficiency. The partition wall 28 formed vertically on the lower substrate 16 serves to distinguish each discharge cell and to suppress mutual interference between adjacent discharge cells. The high frequency electrode 12 is applied with a high frequency driving voltage for causing high frequency sustain discharge. The phosphor 30 is excited by vacuum ultraviolet rays generated during sustain discharge to generate visible light.

3 is a view showing a discharge cell arrangement of a conventional RF PDP.

Referring to FIG. 3, the R, G, and B discharge cells 34a, 34b, and 34c of the RF PDP are formed in a stripe structure in which a square is divided into three, and each of the discharge cells 34a and The ratio of width to length of 34b and 34c) is composed of a ratio of 1: 3. In this case, the horizontal width WH of each of the discharge cells 34a, 34b, and 34c is about 300 μm, and the vertical width WV is about 900 μm.

The partition wall 28 formed vertically between the discharge cells 34a, 34b, and 34c is formed in a waffle structure with a height of about 500 to 1000 µm. In addition, the high frequency electrode 12 and the scan electrode 22 are arranged in a direction crossing the discharge cells 34a, 34b, 34c of R, G, and B, and the electrode width is appropriately selected to a predetermined size. Lose.

4 (a) shows the characteristics of the high frequency discharge voltage according to the width of the discharge cell 34. When the width of the discharge space is 300 μm or less, the high frequency discharge voltage increases rapidly. At this time, if the size of the discharge cell such as VGA (640 * 480) mode is large, there is no problem in maintaining the discharge.However, if the resolution of the XGA (1024 * 768) mode is high and the discharge cell, that is, the pixel size is 1 mm or less, the discharge voltage is increased. It increases rapidly, making high frequency driving difficult.

4 (b) shows the correlation between the high frequency power V _F and the high frequency discharge voltage. The higher the high frequency power is applied, the higher the high frequency discharge voltage is.

As a result, the RF PDP according to the related art rapidly increases the RF discharge voltage to a width of the discharge cell 34 of 300 μm or less, and in order to maintain the RF discharge voltage, a high frequency power must be applied even more. At this time, since the displacement current component not used for the discharge also increases, not only the power loss outside the discharge increases, but also the driving is difficult and there are problems such as an increase in the emission of electromagnetic waves (EMI).

Accordingly, it is an object of the present invention to provide a high frequency plasma display panel in which the discharge cell arrangement is changed to a delta structure to increase the width of the discharge cells, thereby lowering the high frequency driving voltage and improving luminous efficiency.

1 is a perspective view showing a high frequency plasma display panel structure according to the prior art.

FIG. 2 is a longitudinal sectional view of the panel showing the discharge cell structure of the high frequency plasma display panel shown in FIG. 1; FIG.

3 is a view showing a discharge cell arrangement of a high frequency plasma display panel according to the prior art.

4 is a diagram showing a high frequency sustain discharge characteristic.

5 is a view showing a discharge cell arrangement and a discharge area of the high frequency plasma display panel according to the first embodiment of the present invention;

FIG. 6 is a longitudinal sectional view of a discharge cell of the high frequency plasma display panel shown in FIG. 5; FIG.

FIG. 7 is a view illustrating a barrier rib structure according to a discharge cell arrangement of the high frequency plasma display panel of FIG. 5.

8 is a view showing a discharge cell arrangement and a discharge area of a high frequency plasma display panel according to a second embodiment of the present invention;

FIG. 9 is a view illustrating a barrier rib structure according to an arrangement of discharge cells of the high frequency plasma display panel shown in FIG. 8.

<Description of Symbols for Main Parts of Drawings>

10,40: upper substrate 12,42: high frequency electrode

14,20,24,44,50,54: dielectric layer 16,46: lower substrate

18,48: address electrode 19,49: auxiliary electrode

22,52: Scanning electrode 26,56: Protective film

28,58,70: bulkhead 30,60: phosphor

32,62: discharge space

In order to achieve the above object, the high frequency plasma display panel of the present invention is a plasma display panel for displaying an image by a high frequency discharge using a high frequency signal, the high frequency electrode is formed on the upper substrate and supplied with a high frequency signal, phase / Barrier ribs formed to have a plurality of discharge cells disposed adjacent to each other in a delta structure, an address electrode formed on a lower substrate, a first dielectric layer formed on an entire surface of the lower substrate so as to cover the address electrode, and the address electrode A scan electrode formed on the first dielectric layer to be orthogonal to the second dielectric layer, a second dielectric layer formed on the entire surface of the lower substrate so as to cover the scan electrode, a protective film formed on the second dielectric layer, and a phosphor formed on the inner wall of the partition wall; It is characterized by.

In the present invention, an auxiliary electrode is further provided in an area where the scan electrode and the address electrode cross each other so as to be electrically connected to the address electrode at the same height as the scan electrode.

The partition wall in the present invention is formed such that the discharge cells are arranged in a rectangular shape.

In the rectangular discharge cell of the present invention, the parallel and orthogonal widths of the high frequency electrodes are formed in a 4: 3 ratio.

In the present invention, the partition wall is formed such that the discharge cells are arranged in a honeycomb shape.

Other objects and features of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 5 to 8.

FIG. 5 is a view showing a discharge cell arrangement and a discharge area of the high frequency plasma display panel according to the first embodiment of the present invention. FIG. 6 is a view showing a longitudinal cross-sectional view of the discharge cell of the high frequency plasma display panel shown in FIG. .

5 and 6, the high frequency plasma display panel has a delta structure in which discharge cells 64 positioned up and down adjacent to each other form one pixel. In other words, the RF PDP according to the present invention is characterized in that the R discharge cells 64a and B discharge cells 64c and n + 1 or n− are located in the nth (n is a natural number of 1 or more) high frequency electrode lines 42a. A G discharge cell 64b positioned at one high frequency electrode line 42b forms one pixel.

The RF PDP having such a structure is orthogonal to the address electrode 48 formed on the lower substrate 46, the first dielectric layer 50 formed on the lower substrate 46 and the address electrode 48, and the address electrode 48. The scan electrode 52 formed on the first dielectric layer 50, the second dielectric layer 54 formed on the first dielectric layer 50 and the scan electrode 52, and the passivation layer formed on the second dielectric layer 54. A partition wall 58 formed vertically on the passivation layer 56 to distinguish each of the discharge cells 64, a phosphor 60 coated on an inner wall of the partition wall 58, and a partition wall 58. ), The high substrate 40 disposed in parallel with the lower substrate 46, the high frequency electrode 42 formed on the rear surface of the upper substrate 40 in a direction parallel to the scan electrode 52, and the high frequency electrode ( An upper dielectric layer 44 formed on the upper substrate 40 having the 42 formed thereon, and a discharge space 62 formed surrounded by the upper substrate 40, the lower substrate 46, and the partition 58. In addition, the auxiliary electrode 49 is formed to be electrically connected to the address electrode 48 in the vicinity of the region where the scan electrode 52 and the address electrode 48 cross each other, and has the auxiliary electrode 49 formed at the same height as the scan electrode 52. .

As a result, the data pulse applied to the address electrode 48 during the address discharge is equally applied to the auxiliary electrode 49. Since the thicknesses of the first and second dielectric layers 50 and 54 are thin on the auxiliary electrode 49, the voltage drop in the first and second dielectric layers 50 and 54 during the address discharge is small and thus supplied to the auxiliary electrode 49. Most of the driving voltage is applied to the discharge space 62. Thus, address discharge is generated between the auxiliary electrode 49 and the scan electrode 52 connected to the address electrode 48.

Data pulses and scan pulses are applied to the address electrode 48 and the scan electrode 52 to cause address discharge, respectively. The first dielectric layer 50 insulates the address electrode 48 from the scan electrode 52. In the second dielectric layer 54, wall charges are accumulated during address discharge. The passivation layer 56 protects the first and second dielectric layers 50 and 54 from sputtering during discharge to prolong the life of the discharge cells 64, and also generates secondary electrons during discharge to improve discharge efficiency. The partition wall 58 formed vertically on the lower plate divides each discharge cell 64 and serves to suppress mutual interference between adjacent discharge cells 64. The high frequency electrode 42 is applied with a high frequency driving voltage for causing high frequency sustain discharge. The phosphor 60 is excited by vacuum ultraviolet rays generated during sustain discharge to generate visible light.

In addition, the barrier rib structure of the RF PDP according to the first embodiment of the present invention is formed in a rectangular shape such that a plurality of discharge cells 64 arranged up and down adjacently are arranged in a delta type structure as shown in FIG. 7. . The partition wall 58 formed at this time includes a plurality of first partition walls 58a formed parallel to the high frequency electrode 42 and the scan electrode 52, and an address electrode 48 between the first partition walls 58a. The second partition 58b formed in parallel is provided.

Rectangular holes 66 formed by the first and second partitions 58a and 58b are used as discharge cells 64. At this time, the horizontal and vertical widths of the discharge cells 64 are formed in a ratio of 4: 3.

FIG. 8 is a diagram illustrating a discharge cell arrangement and a discharge area of a high frequency plasma display panel according to a second embodiment of the present invention.

First, the longitudinal cross-sectional view of the discharge cells of the high frequency plasma display panel according to the second embodiment of the present invention is formed in the same structure as in FIG.

Referring to FIG. 8, the RF PDP according to the embodiment of the present invention has a delta structure in which discharge cells 64 positioned adjacent to each other up and down in a high frequency plasma display panel form one pixel. In other words, the RF PDP according to the present invention is characterized in that the R discharge cells 64a and B discharge cells 64c and n + 1 or n− are located in the nth (n is a natural number of 1 or more) high frequency electrode lines 42a. A G discharge cell 64b positioned at one high frequency electrode line 42a forms one pixel. At this time, each of the discharge cells 64 is configured in a honeycomb form.

In order to form the honeycomb-shaped discharge cells 64 as described above, the partition wall 70 has a honeycomb shape such that a plurality of discharge cells 64 arranged up and down adjacent to each other are arranged in a delta structure. Is formed. In this case, the partition wall 70 formed may include a plurality of first partition walls 70a formed in a wave shape in a direction parallel to the high frequency electrode 42 and the scan electrode 52, and an address electrode between the first partition walls 70a. A second partition wall 70b formed in parallel with 48 is provided.

The honeycomb holes 72 formed by the first and second partition walls 70a and 70b are used as discharge cells 64. The width and length of the honeycomb discharge cells 64 are formed at a ratio of about 1: 1.

As described above, when the discharge cells 64 of the RF PDP are configured in a rectangular or honeycomb type, the discharge cells 64 have a width of 300 μm or more even in a size of about 700 μm, so that the discharge voltage is rapidly increased. The increasing problem is solved. As a result, the RF PDP according to the present invention can lower the high frequency discharge voltage and the high frequency power for sustain discharge. In addition, the luminous efficiency is increased by increasing the light emitting area according to the structure change of the discharge cells 64.

As described above, in the high frequency plasma display panel according to the present invention, the discharge cell arrangement is changed to a delta structure and the discharge cell structure is configured to have a rectangular or honeycomb shape, thereby increasing the width of the discharge cell. Accordingly, the high-frequency plasma display panel such as a high resolution can lower the frequency of the high-frequency signal for generating sustain discharge, and can greatly improve the luminous efficiency due to the increase in the light emitting area caused by the sustain discharge.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (10)

In a plasma display panel displaying an image by a high frequency discharge using a high frequency signal, A high frequency electrode formed on the upper substrate and supplied with a high frequency signal; A partition wall formed such that a plurality of discharge cells disposed adjacent to each other up and down are arranged in a delta type structure; An address electrode formed on the lower substrate, A first dielectric layer formed on an entire surface of the lower substrate to cover the address electrode; A scan electrode formed on the first dielectric layer to be orthogonal to the address electrode; A second dielectric layer formed on an entire surface of the lower substrate to cover the scan electrode; A protective film formed on the second dielectric layer; And a phosphor formed on the inner wall of the partition wall. delete delete The method of claim 3, wherein And an auxiliary electrode formed in an area where the scan electrode and the address electrode cross each other to be electrically connected to the address electrode at the same height as the scan electrode. The method of claim 2, The barrier rib is formed so that the discharge cells are arranged in a rectangular shape. The method of claim 5, wherein The rectangular discharge cell is a high frequency plasma display panel, characterized in that the parallel and orthogonal width of the high frequency electrode is formed in a 4: 3 ratio. The method of claim 6, The orthogonal width of the high frequency electrode is 300㎛ or high frequency plasma display panel, characterized in that. The method of claim 2, The partition wall is a high frequency plasma display panel, characterized in that the discharge cells are formed to be arranged in a honeycomb. The method of claim 8, And wherein the discharge cells of the honeycomb structure have a width in a direction orthogonal to the high frequency electrode of 300 µm or more. The method of claim 8, And wherein the discharge cells of the honeycomb structure have a parallel and orthogonal width of the high frequency electrode in a ratio of 1 to 1.