KR20000065835A - Plasma Display Panel for Radio Frequency - Google Patents

Abstract

PURPOSE: A plasma display device for microwaves is provided to increase the number of microwaves discharge paths by easily generating waves and easily amplifying the waves, and thus reduces EMI(Electromagnetic Interferences). CONSTITUTION: A plasma display panel for microwaves includes an upper plate(30) having a scan electrode, a lower plate(28) having a microwave electrode, and a barrier(32) dividing each discharge cell. The scan electrode is formed to cross with the data electrode. The microwave electrode is formed in the same direction as the scan electrode. The barrier is formed between the upper plate and the lower plate, and divides each discharge cell. Thereby, the number of microwaves discharge paths is increased, and EMI is reduced.

Description

Plasma Display Panel for Radio Frequency

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to flat panel displays, and more particularly, to a plasma display device for RF configured to increase an RF discharge path.

Recently, a liquid crystal display (hereinafter referred to as "LCD"), a field emission display (hereinafter referred to as "FED") and a plasma display panel (hereinafter referred to as "PDP") Flat display devices such as PDP have been actively developed. Among them, PDP is able to realize large screen of 40 inches or more as well as ease of fabrication by simple structure, excellent brightness and luminous efficiency, memory function and wide viewing angle of 160 ° or more. Has the advantage. The PDP realizes stepwise brightness, ie, gray scale, necessary for displaying an image by adjusting the number of sustain discharges. Thus, the number of sustain discharges is recognized as an important factor for determining the brightness and discharge efficiency of the PDP. In fact, in the AC type PDP, in order to perform sustain discharge, a spherical pulse of 10-100 Hz is periodically applied. In this case, the sustain discharge occurs only once at an extremely short instant per sustain pulse. In addition, the charged particles generated by the sustain discharge are moved along the polarity of the discharge path formed in the sustain electrode pair to form a space charge inside the discharge space of the cell, and the discharge voltage in the discharge space decreases due to the space charge. Sustain can be maintained at a voltage lower than the starting voltage. At this time, the sustain discharge caused by the sustain pulse is generated only once at an extremely short moment every pulse, and most of the other time is consumed in the preparation stage for the wall charge formation and the next discharge, thereby lowering the discharge efficiency of the PDP. In order to solve this problem, a PDP for radio frequency (hereinafter referred to as "RF") has been proposed. A conventional PDP for RF will be described with reference to FIGS. 1 and 2.

Referring to FIG. 1, the conventional RF PDP includes a data electrode 2 formed on the lower substrate 8, a scan electrode 4 mounted on the dielectric layer 16 to be orthogonal to the data electrode 2, and A partition 12 formed vertically on top of the dielectric layer 16 to divide each discharge cell, a phosphor 14 applied to an inner wall of the partition 12 to generate a light beam, and an upper substrate 10 It is provided with an RF electrode 6 formed on the transparent to apply an RF signal. At this time, the arrangement state of the electrodes, the lower substrate 8 is formed with a scan electrode 4 orthogonal to the data electrode 2, the upper substrate 10, the RF electrode in the same direction as the scan electrode 4 (6) is formed. In this case, the scan electrode 4 and the RF electrode 6 are disposed to face each other, and the RF discharge is caused by the two electrodes. In addition, the partition wall of the RF PDP is preferably formed higher than the AC PDP. Meanwhile, the operation of the RF PDP will be described with reference to FIG. 2. When a driving voltage is applied between the data electrode 2 and the scan electrode 4 to correspond to the data signal, address discharge is performed to generate charged particles in the discharge cell. These charged particles are vibrated by the RF pulse applied to the RF electrode 6 to ionize and excite the inside of the discharge cell continuously, thereby causing continuous discharge during the discharge time. This has the same physical effect as positive column with high discharge efficiency in glow discharge. At this time, the RF pulse uses a rectangular pulse (or sine wave) of several MHz to several tens of MHz. On the other hand, when charged particles and ions directly collide with the partition 12, recombination occurs and converted into thermal energy, thereby degrading light efficiency. In order to prevent such a loss, a driving voltage having an alternating polarity is applied between the scan electrode and the RF electrode according to the vibration amplitude of the charged particles and the ions.

However, in the conventional RF PDP, the driving frequency increases because the distance between the scan electrode 4 and the RF electrode 6 is close. As a result, the driving frequency of the RF PDP is increased, making it difficult to generate and amplify waveforms, and also increase the electromagnetic interference (hereinafter referred to as "EMI") when applied to a system.

Accordingly, it is an object of the present invention to provide an RF plasma display device configured to increase an RF discharge path.

1 is a perspective view showing the structure of a conventional RF PDP.

2 is a view for explaining the operation principle of the RF PDP.

3 is a perspective view showing a PDP for RF of the present invention.

4 is a view showing the electrode structure of FIG.

5 is a diagram for explaining a relationship between an electrode tube distance and a driving frequency.

<Description of the code | symbol about the principal part of drawing>

2,22 data electrode 4,24 scan electrode

6,26: high frequency electrode 8,28: lower substrate

10,30: upper substrate 12,32: bulkhead

14,34 phosphor 16,36 dielectric layer

In order to achieve the above object, in the RF PDP of the present invention, the high frequency electrode and the scan electrode are disposed in a diagonal direction in a discharge cell.

Other objects and features of the present invention other than the above object will become apparent from the description of the embodiments with reference to the accompanying drawings.

3 to 5, a preferred embodiment of the present invention will be described.

Referring to FIG. 3, the RF PDP according to the present invention includes a data electrode 22 formed on the lower substrate 28 and a scan electrode 24 mounted on the dielectric layer 36 to be orthogonal to the data electrode 22. And a partition wall 32 vertically formed above the dielectric layer 36 to divide each discharge cell, a phosphor 34 applied to an inner wall of the partition wall 32 to generate a light beam, and an upper substrate 30. It is provided with an RF electrode 6 is formed transparently on the top to apply an RF signal. Functions and operations of the parts are the same as those of FIG. 1, and thus detailed descriptions thereof will be omitted. RF PDP of the present invention is different from the arrangement of the electrode for performing the RF discharge compared to the conventional RF PDP. This will be described in detail. In the RF PDP, the distance between two electrodes (scan electrode and RF electrode) in which RF discharge occurs has a great influence on the discharge characteristics. Referring to FIG. 5, the smaller the distance between the two electrodes, the shorter the reciprocating distance between the charged particles and the ions, and the higher the driving frequency. On the other hand, the greater the distance between the two electrodes, the longer the reciprocating distance between the charged particles and the ions, the lower the driving frequency. The relationship between the distance between the electrodes and the driving frequency is shown in FIG. Due to this, it can be seen that in order to lower the driving frequency, the distance between the electrodes must be increased. Accordingly, in the RF PDP of the present invention, as illustrated in FIG. 4, the scan electrodes 24 and the RF electrodes 26 are disposed diagonally to each other in the discharge cell. In this case, it can be seen that the electrode spacing d when the two electrodes are arranged diagonally to each other as in the present invention is larger than the electrode spacing d 'when the two electrodes are arranged to face each other in the related art. . Accordingly, the RF PDP of the present invention can reduce the driving frequency by increasing the RF discharge pass, thereby facilitating waveform generation and amplification and reducing EMI when applied to the system.

As described above, the RF PDP of the present invention is easy to generate and amplify waveforms, and has an advantage of reducing EMI.

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 (2)

A high frequency plasma display device having an upper plate having a scan electrode orthogonal to a data electrode, a lower plate having a high frequency electrode formed in the same direction as the scan electrode, and a partition wall formed between the lower plate and the upper plate to divide each discharge cell. In And a high frequency electrode and a scan electrode arranged diagonally within the discharge cell. The method of claim 1, And a gap between the high frequency electrode and the scan electrode as far as possible from the inside of the discharge cell.