KR20010002197A - Plasma Display Panel Of High Frequency and Driving Method thereof - Google Patents

Abstract

PURPOSE: A radio frequency plasma display panel device and its driving method are provided to lower a triggering voltage and a radio frequency discharge voltage for starting a radio frequency discharge. CONSTITUTION: A radio frequency electrode(4) is arranged parallel to a triggering electrode(18) on an upper substrate(2). A data electrode(8) is arranged perpendicular to a scanning electrode(12) on a lower substrate(8). A first dielectric layer(10) accumulates charges and is disposed between the data electrode(8) and the scanning electrode(12). A second dielectric layer(13) accumulates charges and is disposed on the first dielectric layer(10). A partition wall(14) intercepts an optical interference among discharge cells. An address discharge is generated due to the voltage difference between a scanning voltage and a data voltage. Activated electric charge particles generate a radio frequency discharge. In this case, a triggering voltage is applied to the triggering electrode(18) so that the electric charge particles are easily activated in a discharge space. Therefore, the triggering voltage and the radio frequency voltage can be lowered.

Description

High frequency plasma display panel device and its driving method {Plasma Display Panel Of High Frequency and Driving Method}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly, to a high frequency plasma display panel element capable of increasing the effect of a triggering signal for starting high frequency, and a driving method thereof.

In recent years, as the demand for large flat panel display devices increases, studies on plasma display panels (hereinafter referred to as PDPs), which are easy to manufacture large-area panels, have been actively conducted. The PDP generally uses a gas discharge phenomenon to display an image using visible light generated by vacuum ultraviolet rays generated during gas discharge to emit phosphors. However, PDP is still in a state of low luminous efficiency compared to the cathode ray tube is required to improve it, and in order to improve the luminous efficiency, various researches on discharge method, cell structure, driving method, phosphor or protective film material and the like are in progress.

The PDP is usually composed of discharge cells corresponding to matrix pixels. Each of these discharge cells is selected by the address discharge according to the image data, and then the vacuum ultraviolet rays generated by the sustain discharge discharge the phosphor to emit visible light. In this case, since the PDP displays a gray scale necessary for displaying an image by adjusting the sustain discharge period, that is, the number of sustain discharges, the number of sustain discharges is an important factor in determining the luminous luminance and luminous efficiency of the PDP. However, when generating a sustain discharge using the existing low frequency alternating current (AC) voltage, the sustain discharge occurs only once at a short time for each applied voltage pulse, and most of the other time is a step for forming wall charges and preparing for the next discharge. By consuming the PDP, the light emission luminance and the light emission efficiency of the PDP were inevitably low.

In order to solve the low luminous luminance and luminous efficiency problems of the low frequency AC PDP, a method of applying a high frequency voltage as a discharge holding voltage has recently been introduced. When a high frequency voltage of several MHz to several hundred MHz is applied, a vibrating electric field is generated inside the discharge cell, and electrons are continuously vibrated to ionize and excite the discharge gas as it vibrates, thereby continuously discharging the electrons for most of the discharge time. Discharge, that is, high frequency discharge occurs. The high frequency discharge has a physical effect such as a positive column having a very high discharge efficiency when the distance between the electrodes is long in the glow discharge. Accordingly, there is an advantage that can significantly improve the discharge efficiency of the PDP when using a high frequency discharge.

Referring to FIG. 1, a perspective view of a discharge cell constructed in a conventional high frequency PDP is shown. The high frequency PDP discharge cell of FIG. 1 includes a high frequency electrode 4 disposed on the upper substrate 2, a data electrode 8 and a scanning electrode 12 disposed on the lower substrate 6.

In FIG. 1, the upper substrate 2 and the lower substrate 6 are spaced apart by the partition 14 and arranged in parallel. The high frequency electrode 4 supplies a high frequency voltage, and the data electrode 8 supplies a data voltage. The scan electrode 12 supplies a scan voltage and serves as a counter electrode of the high frequency electrode 4, that is, a ground electrode. The high frequency electrode 4 and the scan electrode 12 are arranged in parallel, and the data electrode 8 is arranged in the direction orthogonal to the scan electrode 12. A first dielectric layer 10 is disposed between the data electrode 8 and the scan electrode 12 for insulation and charge accumulation. The second dielectric layer 13 is disposed on the first dielectric layer 10 having the scan electrode 12 formed thereon to protect the scan electrode 12 and accumulate charge. The partition wall 14 is formed in a lattice structure in which all directions are blocked to block optical interference between discharge cells. In this case, the partition wall 14 has an increased height than the conventional low frequency AC type for smooth high frequency discharge between the high frequency electrode 4 and the scan electrode 12. On the surface of the partition wall 14, a phosphor 16 for generating visible light of red, green or blue color is applied. Discharge gas is filled in the discharge space provided by the upper and lower substrates 2 and 6 and the partition wall 14.

In the high frequency PDP discharge cell having such a structure, as shown in FIG. 2, an address discharge occurs due to the difference between the scan voltage (-Vs) and the data voltage (Vd) applied to each of the scan electrode 12 and the data electrode 8. As a result, charged particles are produced. Subsequently, high frequency discharge is initiated and maintained by the center particles Vc (ie, the ground voltage) of the high frequency voltage supplied to the high frequency electrode 4 and the scan electrode 12 and by the charged particles. The high frequency discharge is stopped by the erase voltage Ve supplied to the scan electrode 12.

However, when the high frequency voltage is continuously supplied as shown in FIG. 2, not only the interference and noise problems caused by the high frequency voltage are generated, but also the incorrect discharge is generated by the high frequency voltage. For this reason, the method of switching a high frequency signal and supplying only during a high frequency discharge period is used. In this case, the charged particles generated by the address discharge are formed and maintained as wall charges by the time required for the address period. Thus, in order to start high frequency discharge in the high frequency discharge period, a triggering voltage for activating the wall charge to space charge is required. For this purpose, a triggering voltage is supplied to the data electrode 8 and the scan electrode 12 at the start of the high frequency discharge. However, in the conventional high frequency PDP structure, since both the data electrode 8 and the scan electrode 12 are positioned on the lower substrate 6, a high triggering voltage is required to activate the space charge and the activated space charge is also generated. In order to use high frequency discharge, there is a problem that a high high frequency voltage is required. Hereinafter, the problem will be described in detail with reference to FIGS. 3 and 4.

Referring to FIG. 3, an overall electrode arrangement diagram of a high frequency PDP constituting the discharge cell shown in FIG. 1 is shown.

In FIG. 3, the high frequency PDP includes data electrode lines X1 to Xm disposed corresponding to each column line, and scan electrode lines Y1 to parallel to each row line. Yn) and high frequency electrode lines RF. The discharge cell 17 is provided at each intersection of the data electrode lines X1 to Xm, the scan electrode lines Y1 to Yn, and the high frequency electrode lines RF.

FIG. 4 shows voltage waveforms supplied to respective electrode lines during an arbitrary subfield when the PDP shown in FIG. 3 is driven by the ADS method.

During the address discharge period of FIG. 4, the scan voltage (-Vs) is supplied to each of the scan electrode lines (Y1 to Yn) sequentially in line, and the data electrode lines (X1 to Xm) are synchronized with the scan voltage (-Vs). By supplying the data voltage Vd, selective address discharge occurs. Wall charges are accumulated in the discharge cells in which the address discharge is generated and are maintained for the address discharge period. Subsequently, a high frequency discharge is started by activating charged particles by alternately supplying a plurality of triggering voltages Vt to the data electrode lines X1 to Xm and the scan electrode lines Y1 to Yn at the starting point between the high frequency dischargers. To be possible. The activated high-frequency PDP generates an image by performing high frequency discharge by the high frequency voltage commonly supplied to the high frequency electrode lines RF and the high frequency center voltage Vc supplied to the scan electrode lines Y1 to Yn. Will be displayed. The high frequency discharge is stopped by turning off the high frequency voltage supply.

However, the data electrode lines and the scan electrode lines to which the triggering voltage is supplied are located on the lower substrate 6 in the structure of the conventional high frequency PDP. Therefore, a high triggering voltage is required to activate the charged particles in the space, and a high high frequency voltage is required to lead the activated charged particles to use the high frequency discharge. As a result, the high triggering voltage has a problem that the power consumption is increased by the high frequency voltage.

Accordingly, an object of the present invention is to provide a high frequency PDP device capable of lowering a triggering voltage and a high frequency discharge voltage for initiating a high frequency discharge.

1 is a perspective view showing a discharge cell configured in a conventional high frequency plasma display panel.

FIG. 2 is a voltage waveform diagram supplied to each electrode shown in FIG. 1. FIG.

FIG. 3 is an overall electrode layout of the high frequency plasma display panel having the discharge cell of FIG. 1. FIG.

4 is a waveform diagram of voltages supplied to respective electrode lines shown in FIG. 3.

5 is a perspective view illustrating a discharge cell configured in a high frequency plasma display panel according to a first embodiment of the present invention.

6 is a perspective view illustrating a discharge cell configured in a high frequency plasma display panel according to a second embodiment of the present invention.

7 is an overall electrode layout of the high frequency plasma display panel including the discharge cells of FIGS. 5 and 6.

FIG. 8 is a voltage waveform diagram supplied to each electrode line shown in FIG. 7. FIG.

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

2: upper substrate 4: high frequency electrode

6: lower substrate 8: data electrode

10: first dielectric layer 12: scanning electrode

13: second dielectric layer 14: partition wall

16: phosphor 18, 22: triggering electrode

20: upper dielectric layer

In order to achieve the above objects, the high frequency PDP device according to the present invention has a high frequency electrode to which a high frequency voltage is supplied, a triggering electrode to be arranged side by side on a substrate such as a high frequency electrode, and a triggering voltage to be supplied, It is characterized in that it comprises a scan electrode which is arranged side by side and supplied with a scan voltage, and a data electrode which is arranged to be orthogonal on the same substrate as the scan electrode and supplied a data voltage.

According to the present invention, a high frequency PDP driving method includes an address step of generating discharge of an address discharge by using a scan voltage and a data voltage supplied to scan electrode lines and data electrode lines, respectively, and a plurality of triggering electrode lines. And initiating and maintaining high frequency discharge in the discharge cells in which the address discharge is generated using a triggering voltage and a high frequency voltage applied to the high frequency electrode lines.

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

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

5 is a perspective view of a discharge cell of the high frequency PDP according to the first embodiment of the present invention. 5 shows a high frequency electrode 4 and a triggering electrode 18 arranged side by side on the upper substrate 2, and a data electrode 8 and a scanning electrode disposed orthogonally on the lower substrate 8; 12).

In FIG. 5, the upper substrate 2 and the lower substrate 6 are spaced apart from each other by the partition 14 and arranged in parallel. The high frequency electrode 4 supplies a high frequency voltage, and the triggering electrode 18 supplies a triggering voltage. The data electrode 8 supplies a data voltage, the scan electrode 12 supplies a scan voltage and a triggering voltage, and serves as a counter electrode of the high frequency electrode 4, that is, a ground electrode. The high frequency electrode 4 and the scan electrode 12 are arranged in parallel, and the data electrode 8 is arranged in the direction orthogonal to the scan electrode 12. A first dielectric layer 10 is disposed between the data electrode 8 and the scan electrode 12 for insulation and charge accumulation. The second dielectric layer 13 is disposed on the first dielectric layer 10 having the scan electrode 12 formed thereon to protect the scan electrode 12 and accumulate charge. The partition wall 14 is formed in a lattice structure in which all directions are blocked to block optical interference between discharge cells. On the surface of the partition wall 14, a phosphor 16 for generating visible light of red, green or blue color is applied. Discharge gas is filled in the discharge space provided by the upper and lower substrates 2 and 6 and the partition wall 14.

6 is a perspective view of a discharge cell of a high frequency PDP according to a second embodiment of the present invention. In the discharge cell of FIG. 5, the triggering electrode 18 is positioned on the same plane as the high frequency electrode 4, while in the discharge cell of FIG. 6, the triggering electrode 22 is vertically overlapped with the high frequency electrode 4. Located on the other side, the upper dielectric layer 20 for insulation is further formed between the triggering electrode 22 and the high frequency electrode 4.

In the high frequency PDP discharge cells having the structure as shown in FIGS. 5 and 6, an address discharge is generated by the difference between the scan voltage and the data voltage applied to the scan electrode 12 and the data electrode 8, respectively. The charged particles remain in the wall charge form during the address discharge. Subsequently, the triggering voltage supplied to the triggering electrode 18 is added to the wall charge to generate a discharge, thereby activating the charged particles in the discharge space. The activated charged particles cause high frequency discharge by the high frequency voltage supplied to the high frequency electrode 4 and the center voltage (ie, the ground voltage) of the high frequency voltage supplied to the scan electrode 12. In this case, as the triggering voltage is applied to the triggering electrode 18 positioned on the upper substrate 2, the charged particles can be relatively easily activated in the discharge space, thereby lowering the triggering voltage and the high frequency voltage.

FIG. 7 illustrates an overall electrode arrangement diagram of the high frequency PDP constituting the discharge cells of FIGS. 5 and 6.

In FIG. 7, the high frequency PDP includes data electrode lines X1 to Xm disposed corresponding to each column line, and scan electrode lines Y1 to parallel to each row line. Yn), high frequency electrode lines RF and triggering electrode lines TR. Here, the triggering electrode lines TR and the high frequency electrode lines RF positioned on the upper substrate 2 are arranged side by side on the same surface or side by side on the other upper and lower surfaces as described above. The discharge cell 24 is provided at each intersection of the data electrode lines X1 to Xm, the scan electrode lines Y1 to Yn, the high frequency electrode lines RF, and the triggering electrode lines TR. .

FIG. 8 illustrates voltage waveforms supplied to respective electrode lines during an arbitrary subfield when the PDP shown in FIG. 7 is driven by the ADS method.

During the address discharge period of FIG. 8, the scan voltage (-Vs) is supplied to each of the scan electrode lines (Y1 to Yn) sequentially in line, and the data electrode lines (X1 to Xm) are synchronized with the scan voltage (-Vs). By supplying the data voltage Vd, selective address discharge occurs. Wall charges are accumulated in the discharge cells in which the address discharge is generated and are maintained for the address discharge period. Subsequently, a plurality of triggering voltages Vt are supplied to the triggering electrode lines TR at the starting point between the high frequency discharges to activate the charged particles so that the high frequency discharges can be started. The activated high-frequency PDP generates an image by performing high frequency discharge by the high frequency voltage commonly supplied to the high frequency electrode lines RF and the high frequency center voltage Vc supplied to the scan electrode lines Y1 to Yn. Will be displayed. The high frequency discharge is stopped by turning off the high frequency voltage supply.

As described above, according to the high frequency PDP device and the driving method thereof according to the present invention, by separately providing a triggering electrode on the upper substrate to which the triggering voltage for initiating the high frequency discharge is activated, the charged particles are relatively easily activated at a low triggering voltage. In addition, it is possible to start high frequency discharge relatively easily with a low high frequency voltage. As a result, power consumption can be reduced by reducing the triggering voltage and the high frequency voltage.

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 (6)

In the high frequency plasma display panel device, A high frequency electrode supplied with a high frequency voltage, A triggering electrode disposed side by side on the same substrate as the high frequency electrode and supplied with a triggering voltage; A scan electrode disposed parallel to the high frequency electrode and another substrate and supplied with a scan voltage; And a data electrode arranged to be orthogonal to the same substrate as the scan electrode and supplied with a data voltage. The method of claim 1, And the triggering electrode is positioned on the same surface as the high frequency electrode. The method of claim 1, The triggering electrode is located on a different surface from the high frequency electrode, The high frequency plasma display panel device, characterized in that the insulating layer is further formed between the triggering electrode and the high frequency electrode. The method of claim 1, And a plurality of triggering voltages alternated with the triggering voltages are supplied to the scan electrodes. An address step of generating a discharge from the address discharge using the scan voltage and the data voltage supplied to the scan electrode lines and the data electrode lines, respectively; Using a plurality of triggering voltages applied to the triggering electrode lines and high frequency voltages applied to the high frequency electrode lines to start and maintain the high frequency discharge in the discharge cells in which the address discharge is generated. Driving method. The method of claim 5, And supplying a plurality of triggering voltages alternated with the triggering voltages to the scan electrode lines.