KR100246225B1 - High contrast plasma display panel using auxilliary discharge region - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (PDP-Plasma Display-Panel), which is a flat panel display device. In particular, by forming an auxiliary discharge region below the plasma discharge region, the driving voltage of the address electrode is reduced, and the overall brightness and contrast characteristics are reduced. A high brightness PDP using an auxiliary discharge region to be improved.

The present invention is the upper glass, the middle glass, the lower glass is arranged in sequence at a predetermined interval; A partition wall is formed between the upper plate glass and the middle plate glass so as to form a plasma discharge region, and an insulating wall is formed between the middle plate glass and the lower plate glass so that an auxiliary discharge region is formed; The plasma discharge region includes a pair of first sustain electrodes on a bottom surface of the upper plate glass, a protective layer protecting the first sustain electrode, a dielectric layer for limiting a discharge current between the upper plate glass and the protective layer, and the first layer. An address electrode and a phosphor are provided on an upper surface of the intermediate plate glass at a position opposite to the one sustain electrode; The auxiliary discharge region is characterized in that a pair of second sustain electrodes are provided for causing sustain discharge.

Description

High Brightness PDP Using Auxiliary Discharge Zones

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (PDP-Plasma Display-panel), which is a flat panel display device. In particular, by forming an auxiliary discharge region under the plasma discharge region, the driving voltage of the address electrode is reduced, and the overall brightness and contrast characteristics are reduced. A high brightness PDP using an auxiliary discharge region to be improved.

In general, a plasma display panel (hereinafter referred to as 'PDP') is a flat panel display device using a penning gas for discharging, and is coated with a dielectric material having a relatively high pressure neon or helium gas as a base gas. A display device using a light emitting phenomenon caused by discharge generated between narrow electrodes.

Such PDPs are classified into AC discharge type (AC-PDP) and DC discharge type (DC-PDP) according to the driving voltage type applied to the discharge cell. The AC discharge type is a square wave AC voltage or pulse voltage. Drive, and the direct-current discharge type is driven by the direct-current voltage. Structurally, the AC discharge type electrode is covered with a dielectric, whereas the DC discharge type electrode is exposed to the discharge space as it is, so that a discharge current flows while the discharge voltage is applied.

Here, in the conventional PDP, as shown in FIG. 1, the upper plate glass 10 on which the pair of sustain electrodes 17 are deposited, and the address electrode 22 are deposited, and the phosphor 26 is coated on the lower plate A partition wall 24 for inter-cell isolation is provided so that the glass 20 is disposed to face each other and a discharge space is formed therebetween.

Here, a pair of sustain electrodes 12 are deposited on the upper plate glass 10, and the dielectric layer 14 and the protective layer 16 for limiting and protecting the discharge current on the surface on which the sustain electrodes 12 are deposited. This is apply | coated uniformly.

In addition, an address electrode 72 is deposited on the upper plate glass 20, and partition walls 24 arranged at regular intervals are formed between the address electrodes 72, and light is emitted by ultraviolet rays between the partition walls 24. Phosphor 26 is applied.

On the other hand, the dielectric layer 14 and the protective layer 16 protects the sustain electrode 17 from ion bombardment during discharge. The dielectric layer 14 discharges when a voltage is applied to the pair of sustain electrodes 17. It acts as a current limiter, and wall charges form in this layer, helping to lower the drive voltage with a priming effect.

In addition, when the sputtering occurs by the gas discharge in the plasma discharge space, the protective layer 16 may damage or wear the sustain electrode 12 itself, thereby reducing the luminance.

In the conventional PDP configured as described above, since one pixel is formed of three cells of a stripe shape of RGB (Red Green Blue), the cell unit of each pixel is determined by the distance between the partition walls 24 of the lower glass 20. .

In this case, the operation of the PDP is such that surface discharge is applied to the surface of the dielectric layer 14 and the protective layer 16 on the sustain electrode 12 by applying an alternating voltage between the sustain electrode 12 and the address electrode 22. UV light is generated. At this time, the fluorescent material 26 applied to the lower glass 20 is excited by the ultraviolet rays to emit visible light, and color display is performed by the fluorescent material 26 coated separately.

However, the conventional PDP constructed and operating as described above generates unnecessary discharges during the reset period because it generates a writing discharge again after initially supplying and erasing a high driving voltage to form a large number of wall charges. By doing so, there is a problem of inhibiting the overall brightness and contrast.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and by providing another glass substrate and a sustain electrode on the glass substrate on which the address electrode is deposited to form an auxiliary discharge region, the brightness of the image is increased and the contrast is improved, as well as driving. The present invention provides a high-brightness PDP using an auxiliary discharge region capable of lowering a voltage.

1 is a block diagram showing the internal structure of a conventional PDP.

2 is a block diagram showing an embodiment of a high-brightness PDP using the auxiliary discharge region according to the present invention.

3 and 4 show other embodiments according to the present invention.

* Explanation of symbols for main parts of the drawings

50: upper plate glass 52: first sustain electrode

54 dielectric layer 56 protective layer

60: intermediate plate glass 62: address electrode

66: phosphor 70: lower glass

75: second sustain electrode 80: partition

A: plasma discharge region B: auxiliary discharge region

In the high brightness P using the auxiliary discharge region of the present invention for realizing the above problems, the upper plate glass, the intermediate plate glass, and the lower plate glass are sequentially arranged at regular intervals; A partition wall is formed between the upper plate glass and the middle plate glass so as to form a plasma discharge region, and an insulating wall is formed between the middle plate glass and the lower plate glass so that an auxiliary discharge region is formed; The plasma discharge region includes a pair of first sustain electrodes on a bottom surface of the upper plate glass, a protective layer protecting the first sustain electrode, a dielectric layer for limiting a discharge current between the upper plate glass and the protective layer, and the first layer. An address electrode and a phosphor are provided on an upper surface of the intermediate plate glass at a position opposite to the one sustain electrode; The auxiliary discharge region is characterized in that a pair of second sustain electrodes are provided for generating sustain discharge.

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

The high-brightness PDP using the auxiliary discharge region according to the present invention is formed between the upper glass 50 and the middle glass 60 as shown in FIGS. 2 to 4 so as to cause plasma discharge similarly to the prior art. A pair of second sustain electrodes 75 are deposited on the lower side of the intermediate plate glass 60 to provide the lower plate glass 70 and the partition wall 80 so that auxiliary discharge occurs.

That is, the upper plate glass 50, the intermediate plate glass 60, and the lower plate glass 70 are sequentially arranged at regular intervals, and the plasma discharge region A is disposed between the upper plate glass 50 and the intermediate plate glass 60. The partition wall 80 is provided so that the partition wall 80 may be formed, and the partition wall 70 is provided to isolate the cells between the intermediate plate glass 70 and the lower plate glass 77 so that the auxiliary discharge regions B are formed.

In addition, a pair of first sustain electrodes 52 for supplying a driving pulse to the bottom surface of the upper glass 70 and a protective layer for protecting the first sustain electrodes 52 in the plasma discharge region A ( 56, a dielectric layer 54 for limiting a discharge current between the top glass 50 and the protective layer 56, and an upper surface of the intermediate plate glass 60 at a position opposite to the first sustain electrode 52. The address electrode 62 and the phosphor 66 are provided.

In addition, a pair of second sustain electrodes 75 are disposed in the auxiliary discharge region B between the intermediate plate glass 60 and the lower plate glass 70 so as to cause a sustain discharge.

Here, as shown in FIG. 7, the second sustain electrode 75 is disposed to face the intermediate plate glass 60 and the lower plate 70 so that a pair of mutually opposite discharges are provided. As shown in Figure 4 may be installed side by side at a predetermined interval on the bottom surface of the intermediate plate glass 60 so as to discharge if a pair.

In addition, as shown in FIGS. 2 and 3, the address electrode 62 and the phosphor 66 have a central portion between the partition wall 80 and the partition wall 80 upwardly from the middle plate glass 67. It is formed to protrude, or is formed in a planar shape on the middle plate glass 60 as shown in FIG.

The operation of the high luminance PDP using the auxiliary discharge region of the present invention configured as described above is as follows.

According to the present invention, an auxiliary discharge region B having the same function as the first sustain electrode 52 of the upper plate glass 50 is added to the lower side of the intermediate plate glass 60 on which the address electrode 72 is deposited. Like (DC-PDP), priming effects can be obtained between cells, and contrast is improved.

This is because, in general, the DC discharge type (DC-PDP) has a better contrast than the AC discharge type (AC-PDP) because there is an auxiliary cell that performs a priming action. This auxiliary discharge cell generates a priming by discharging in an invisible region other than the light emitting region at the time of discharging, so that even when the cell is turned on or off, many wall charges are not affected at all. The contrast increases due to the ratio of on / off of each cell.

Here, the present invention forms a priming discharge space by adding an auxiliary discharge region B below the plasma discharge region A, and simultaneously with the first sustain electrode 72 at the top when the cell is turned on, the second sustain electrode at the same time. When 75 is also turned on to cause the discharge in the auxiliary discharge region B, the address electrode 62 on the intermediate plate glass 60 causes the discharge of the auxiliary discharge region B to serve as a backlight, thereby improving luminance. Is increased.

In addition, when the cell of the plasma discharge region A is turned off, the auxiliary discharge region B is also turned off, so that the potential of the black level is further dropped, thereby increasing the contrast of the cell on and off.

Then, the first sustain electrode 52 located above the address electrode 62 and the second sustain 75 electrode located below operate at the same time, thereby discharging an initial operation or a discharge after forming the discharge. It is possible to further lower the driving voltage for maintaining.

Further, the first sustain electrode 72 of the plasma discharge region A and the second sustain electrode 75 of the auxiliary discharge region B are alternately operated to form a large number of wall charges at several times in one cycle. Unlike the conventional method of applying a high voltage, a low voltage can be applied to form a large number of wall charges in the beginning and can double the efficiency of discharge by the backlight function.

In the high-brightness PDP using the auxiliary discharge region according to the present invention constructed and acting as described above, since the auxiliary region B is provided in addition to the plasma discharge region A, the auxiliary discharge also operates when the cell is ON. When the brightness is brighter and the cell is turned off, the auxiliary discharge is also turned off, and the black level is dropped, thereby improving the contrast.

In addition, in the present invention, since the auxiliary discharge region B is added, the first sustain electrode voltage is supplied twice to lower the driving voltage, and the upper and lower parts alternately operate to increase the number of emission and increase the luminance. There is also an advantage.

Claims (5)

The top glass, the middle glass, and the bottom glass are arranged one after the other at regular intervals; A partition wall is formed between the upper plate glass and the middle plate glass so as to form a plasma discharge region, and an insulating wall is formed between the middle plate glass and the lower plate glass so that an auxiliary discharge region is formed; The plasma discharge region includes a pair of first sustain electrodes on a bottom surface of the upper plate glass, a protective layer protecting the first sustain electrode, a dielectric layer for limiting a discharge current between the upper plate glass and the protective layer, and the first layer. An address electrode and a phosphor are provided on an upper surface of the intermediate plate glass at a position opposite to the one sustain electrode; And a pair of second sustain electrodes for generating sustain discharge in the auxiliary discharge region. The high brightness PDP using an auxiliary discharge region according to claim 1, wherein the second sustain electrode is provided to face the intermediate plate glass and the lower plate glass so that a pair of mutually opposite discharges occur. The high brightness PDP using the auxiliary discharge region according to claim 1, wherein the second sustain electrodes are disposed side by side at a predetermined interval so that the second sustain electrodes are discharged in pairs. The high brightness PDP using an auxiliary discharge region of claim 1, wherein the address electrode and the phosphor are formed such that a central portion between the barrier rib and the barrier rib protrudes upward from the intermediate plate glass. The high brightness PDP using an auxiliary discharge region according to claim 1, wherein the address electrode and the phosphor are formed in a planar shape on the intermediate plate glass.

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