KR20010004095A - Discharge electrode of plasma display panel - Google Patents

Abstract

PURPOSE: A discharge electrode of a plasma display panel is provided to improve the efficiency of discharging without increasing of the beginning voltage in discharging. CONSTITUTION: A discharge electrode of a plasma display panel includes a discharge beginning field(21A), a discharge maintaining field(21B), a hall(H), an ITO electrode(21) and a bus electrode(22). The hall(H) is located between the discharge beginning field(21A) and the discharge maintaining field(21B). The bus electrode(22) is formed on the discharge maintaining field(21B) of the ITO electrode(21). The bus electrode(22) is for compensating for high resistance of a transparent electrode and for preventing being distorted of the pulse signal by lowering resistance. The hall(H) is a form of a rectangle and the partition wall(BR) is aligned between halls(H) arranged by the bus electrode(22) vertically.

Description

Discharge electrode of plasma display panel {DISCHARGE ELECTRODE OF PLASMA DISPLAY PANEL}

The present invention relates to a plasma display panel manufacturing method, and more particularly to a discharge electrode of the plasma display panel.

Plasma display panels (hereinafter referred to as PDPs) are devices that display characters or graphics using light emitted from plasma generated during gas discharge. PDP has the advantage of being most suitable for large-scale display among various flat panel displays such as liquid crystal display (LCD), field emission display (FED), and electroluminescence display (ELD) which are being actively studied.

That is, the plasma display panel can be enlarged to 40 "or larger, and CRT level colorization is possible because the ultraviolet light generated by the discharge uses a photoluminescence mechanism that stimulates the phosphor to emit visible light. As a self-emissive display, it has many unique advantages not found in other flat panel devices, such as a wide viewing angle of more than 160 °. It is considered as a large display device for multimedia.

PDP uses two glass substrates with a thickness of about 3 mm to apply an appropriate electrode and phosphor on each substrate, and forms plasma in the space therebetween while maintaining the distance between the two substrates at about 0.1 mm to 0.2 mm. Since it is adopted, it can be enlarged as a flat plate. In addition, in the PDP, the gas discharge has a strong non-linearity in which discharge does not occur even when a voltage is applied between electrodes, and a super large panel having a memory function that is essential for driving a large display. Even in this case, a high quality image can be expressed without deteriorating the luminance.

Plasma display panels have a direct current (DC type) in which the electrode for generating plasma is directly exposed to the plasma so that conduction current flows directly through the electrode, and the electrode is covered with a dielectric and is not directly exposed. ) Is divided into the alternating current type (AC type).

The front plate of AC type PDP consists of a pair of parallel transparent electrodes, a bus electrode formed on the transparent electrode to increase conductivity, a dielectric layer, etc., and the back plate is an address electrode, a dielectric layer, and a dielectric layer perpendicular to the bus electrode. And a fluorescent layer formed between the partition walls and the partition walls. The front plate and the back plate of such a structure are sealed and exhausted, and a PDP is manufactured.

The main factor affecting the discharge characteristics in the plasma display panel is a discharge electrode, which is generally composed of a transparent electrode ITO and a bus electrode.

FIG. 1A is a plan view showing a front plate and a partition of a conventional PDP, and FIG. 1B is a cross-sectional view taken along line AA ′ of FIG. 1A. 1A and 1B, reference numeral 10 denotes a glass substrate, 11 denotes an indium tin oxide (ITO) electrode, 12 denotes a bus electrode, 13 denotes a transparent dielectric, 14 denotes an MgO layer, and BR 'Represents a bulkhead.

The ITO electrode 11 is typically a stripe structure and the electrode spacing is about 100 μm at 42 ″ PDP. The bus electrode 12 is located at the center of the ITO electrode 11.

The conventional PDP having such a structure has an efficiency of 1 lm / W to 2 lm / W and a brightness of 300 mW / m 2 to 500 cd / m 2, which is lower than that of current CRT TVs. Therefore, in order to spread PDP as a home TV, power consumption and brightness characteristics comparable to those of current CRT TVs are required.

In the conventional PDP structure, a method of increasing the distance between the discharge electrodes may be considered to increase the discharge efficiency, but in this case, since the discharge start voltage is increased, it is difficult to apply to the actual panel.

The present invention devised to solve the above problems is to provide a discharge electrode structure of the plasma display panel that can improve the discharge efficiency without increasing the discharge start voltage.

Figure 1a is a plan view showing the front plate and the partition of the conventional PDP together,

FIG. 1B is a cross-sectional view along the line AA ′ of FIG. 1A;

FIG. 2A is a plan view showing the front plate and the partition wall of the PDP according to the first embodiment of the present invention; FIG.

FIG. 2B is a cross-sectional view along the line AA ′ of FIG. 2A;

3A is a plan view showing a front plate and a partition of a PDP according to a second embodiment of the present invention;

3B is a plan view showing the front plate and the partition wall of the PDP according to the third embodiment of the present invention;

4A and 4B are explanatory views for explaining a discharge process in the discharge electrode structure according to the present invention;

* Description of reference numerals for the main parts of the drawings *

21A: discharge start area 21B: discharge holding area

22: bus electrode

In order to achieve the above object, the present invention includes a plurality of holes therein and is divided into a discharge start region and a discharge holding region with the holes interposed therebetween, and the discharge holding region width is larger than the discharge start region width. A larger first electrode; And a discharge electrode formed on the discharge holding area of the first electrode and having a second electrode having a lower resistance than the first electrode.

The present invention is characterized by providing a discharge electrode structure of a plasma display panel that can further improve the discharge efficiency while having a low discharge start voltage characteristics by dividing the discharge electrode into a discharge start region and a discharge sustain region.

Hereinafter, the structure of the discharge electrode of the plasma display panel according to an embodiment of the present invention with reference to the accompanying drawings will be described in detail.

FIG. 2A is a plan view showing the front plate and the partition wall of the PDP according to the first embodiment of the present invention, and FIG. 2B is a cross-sectional view along the line AA ′ of FIG. 2A.

As shown in Figs. 2A and 2B, the discharge electrode according to the first embodiment of the present invention has a discharge start region 21A, a discharge sustain region 21B, a discharge start region 21A, and a discharge sustain region 21B. It consists of the ITO electrode 21 which consists of the hole H located in this, and the bus electrode 22 formed on the discharge holding area 21B of the ITO electrode 21. As shown in FIG. The bus electrode 22 is to compensate for the high resistance of the transparent electrode, and is to lower the resistance to prevent distortion of the pulse signal. 2A and 2B, reference numeral 20 denotes a glass substrate.

In the PDP structure according to the first embodiment of the present invention described above, the hole H has a rectangular shape, and the partition wall BR is aligned between the neighboring holes H in a direction perpendicular to the bus electrode 12. ), But the shape of the hole (H) and the alignment position of the partition wall can be modified.

3A is a plan view showing the front plate and the partition wall of the PDP according to the second embodiment of the present invention, showing that the partition wall BR is aligned with the center of the rectangular hole H. As shown in FIG.

3B is a plan view showing the front plate and the partition wall of the PDP according to the third embodiment of the present invention, showing that the holes H have an elliptical shape and the partitions are aligned between neighboring holes H. FIG. In the same structure as in the third embodiment, the partition wall BR may be aligned with the center of the hole H.

In the discharge electrode structure as described above, after the discharge is initiated in the neighboring discharge start region 21A, the discharge spreads to the entire surface of the electrode to maintain the discharge in the discharge holding region 21A.

In other words, when the applied voltage is increased, as shown in Fig. 4A, discharge occurs in the discharge start area 41A in parallel with a predetermined interval a, and after discharge is started, as shown in Fig. 4B. The discharge is held (B) between the discharge holding regions 41B separated by the predetermined interval b with the discharge start region 41A interposed therebetween.

In this structure, the distance between the discharge electrodes is not an interval a between the neighboring discharge start regions 41A, but an interval b between the discharge holding regions 41B positioned with the discharge start regions 41A interposed therebetween. Therefore, the distance between the discharge electrodes is increased, the discharge efficiency is increased, and the increase in the discharge start voltage can be suppressed.

4A and 4B, reference numeral 40 denotes a glass substrate, 42 is a bus electrode, 43 is a transparent dielectric, and 44 is an MgO layer.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

According to the present invention as described above, the discharge electrode of the plasma display panel can be divided into a discharge start region and a discharge sustaining region to increase the discharge efficiency of the panel, and further reduce power consumption at the same luminance.

Claims (5)

In the plasma display panel, A first electrode having a plurality of holes therein and separated into a discharge start region and a discharge holding region with the holes interposed therebetween, the first electrode having a larger width of the discharge holding region than the width of the discharge starting region; And A second electrode formed on the discharge holding region of the first electrode and having a lower resistance than the first electrode; Plasma display panel comprising a discharge electrode made of. The method of claim 1, And said hole has a rectangular shape or an ellipse shape. The method according to claim 1 or 2, The first electrode, A plasma display panel comprising ITO (indium tin oxide). The method of claim 3, wherein And a partition wall arranged between a central portion of the hole or an adjacent hole. The method of claim 3, wherein The second electrode, Plasma display panel, characterized in that the bus electrode.