KR20060002627A - Plasma display panel - Google Patents

Abstract

The present invention relates to an electrode structure of a plasma display panel capable of reducing luminance and efficiency or manufacturing cost.

In a plasma display panel including a scan bus electrode and a sustain bus electrode on an upper substrate, each of the scan electrode and the sustain electrode is formed of two bus electrodes, and the two bus electrodes are connected by a first auxiliary electrode. It is characterized by.

In the electrode structure of the plasma display panel, the transparent electrode is not formed, and the electrode structure is formed only by the bus electrodes for scanning and sustain, thereby reducing the manufacturing cost and the discharge holding voltage and the discharge starting voltage which are a problem when using the transparent electrode. By reducing the characteristic, there is an effect of improving luminance and efficiency or driving characteristics.

Plasma display panel, long column structure, bus electrode, auxiliary electrode, floating electrode

Description

Plasma Display Panel {Plasma Display Panel}

1 is a diagram illustrating an electrode structure of a long column structure plasma display panel.

2A, 2B, and 2C are diagrams showing discharge initiation and discharge sustaining principles of a long column structure plasma display panel;

3 is a diagram showing a top electrode structure of a three-electrode alternating surface discharge type plasma display panel according to a first embodiment of the present invention.

4A illustrates a top electrode structure of a three-electrode alternating surface discharge plasma display panel according to a second embodiment of the present invention.

4B illustrates a top electrode structure of a three-electrode alternating surface discharge plasma display panel according to a third embodiment of the present invention.

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel including a bus electrode.

In general, a plasma display panel (hereinafter, referred to as a 'PDP') has a partition wall formed between a front glass and a rear glass of soda-lime glass, each unit cell. In the cell, an inert gas to which a small amount of xenon (Xe) is added is discharged by a high frequency voltage by using Ne, Helium, or a mixture of Neon and Helium (Ne + He) as the main discharge gas. When the vacuum ultraviolet rays (Vacuum Ultraviolet rays) are generated to emit the phosphor formed between the partition wall to implement the image.

The PDP is an image display device using plasma discharge of an inert gas in a micro space having a length of about 0.1 mm to 1 mm compared to a cathode ray tube (CRT), which has been mainly used for display means. It is thin and has a feature of realizing a large screen with low power consumption.

In the case of PDP, which is generally used, the luminous efficiency of power is about 1 to 1.5 lm / W. On the other hand, some of the test sample PDPs exhibit higher luminous efficiency compared to 2.0 lm / W. The luminous efficiency of the test sample is higher than that of the commonly used PDP, not by structural improvement, but by adding about 14% more Xe in the gas injected into the discharge space than the average amount. Result.

Increasing the amount of Xe added as described above may increase the luminous efficiency compared to power, but has a negative effect of increasing the wear of the front panel electrode and increasing the sustain voltage to maintain the discharge. In addition, in the driving of the panel, the cooling effect of electrons due to the increase in the amount of Xe increases, which causes a time delay phenomenon in which the start of discharge is delayed.

1 is a diagram illustrating an electrode structure of a long column structure plasma display panel.

The long-column PDP emits light by exciting a phosphor by gas discharge in a negative glow region, and discharges by using a positive column region having a high Xe excitation characteristic.

In general, when the interval 10 between the transparent electrodes 200a and 200b has a discharge period of 300 μm, a positive column region exists between the transparent electrodes 200a and 200b.

The luminous efficiency of the discharge using the positive column region is higher than 7 lm / W, compared to the luminous efficiency of 1 to 2 lm / W in the negative glow region.

Therefore, the interval 10 between the transparent electrodes 200a and 200b is set to 300 μm or more in order to enlarge the positive column region.

2A, 2B, and 2C are diagrams illustrating discharge initiation and discharge retention principles of a long column structure plasma display panel.

As shown in FIG. 2A, negative charges are accumulated on the scan electrode 210 and positive charges are accumulated on the address electrode 230 by the reset waveform applied to the electrodes when the PDP is driven. Subsequently, when a negative voltage is applied to the scan electrode 210, the gap 10 between the transparent electrodes 200a and 200b of the upper plate is larger than the gap 20 between the upper plate and the lower plate and thus the scan electrode 210 of the upper plate and the scan electrode 210. The weak discharge 600 is generated between the address electrodes 230 of the lower plate.

As shown in FIG. 2B, electrons are diffused into the sustain electrode 220 by the potential difference between the scan electrode 210 and the sustain electrode 220 to form a positive column region 700. The negative glow 710 discharge region formed by the initial discharge stays between the scan electrode 210 of the upper plate and the address electrode 230 of the lower plate, and maximizes the positive column 700 region. It extends to the sustain electrode 220.

As shown in FIG. 2C, at the end of diffusion of the positive column region, the scan electrode 210 and the scan electrode 210 may be formed due to the accumulation of charge having a polarity opposite to that of the positive column region 800. The potential difference between the sustain electrodes 220 is canceled out so that the discharge is decayed, thereby inverting the polarity of the wall charge of each electrode or changing to neutral.

However, ITO, which is a material of the transparent electrodes 200a and 200b of the plasma display panel having a long column structure, is expensive. Accordingly, when the transparent electrodes 200a and 200b are formed of ITO, a manufacturing cost of the plasma display panel increases.

In the plasma display panel having a long column structure, the interval 10 between the transparent electrodes 200a and 200b is widened to 300 μm or more, thereby increasing the discharge holding voltage and increasing the discharge start voltage. do.

 The present invention is to solve the above problems, the transparent electrode is not formed, the electrode structure is formed only by the bus electrode for scanning and sustain to reduce the manufacturing cost and discharge maintenance voltage and discharge which is a problem when using the transparent electrode An object of the present invention is to provide an electrode structure of a plasma display panel capable of reducing a starting voltage characteristic to improve luminance and efficiency or driving characteristics.

In order to achieve the above object, in an electrode structure of a plasma display panel including a scan bus electrode and a sustain bus electrode positioned on an upper substrate, an electrode structure of the plasma display panel according to the present invention may include two scan electrodes and one sustain electrode. It is formed of two bus electrodes, characterized in that the two bus electrodes are connected by a first auxiliary electrode.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

3 is a diagram illustrating a top electrode structure of a three-electrode alternating surface discharge plasma display panel according to a first embodiment of the present invention. As shown, the scan bus electrodes 100a ₁ and 100a ₂ and the sustain bus electrodes 100b ₁ and 100b ₂ corresponding to one subpixel are respectively provided with two bus electrodes 100a and 100b in the discharge space. It includes.

In addition, the bus electrodes 100a ₂ and 100b ₁ proximate the cell center direction and the bus electrodes 100a ₁ and 100b ₂ proximate the cell up and down direction are connected by the first auxiliary electrode 500. At this time, the length of the first auxiliary electrode is about 80um each. A discharge distance between the cell center and close to the direction the bus electrodes (100a _2, 100b ₁₎ for scanning of the bus electrodes (100a) and the sustain bus electrode (100b) for (d) is not less than 300um.

According to the present invention, the first auxiliary electrode 500 reduces the line resistance value and reduces the probability of disconnection. In addition, the present invention reduces the manufacturing cost required in manufacturing the conventional transparent electrodes 200a and 200b by using only the bus electrodes 100a and 100b and makes the discharge distance d more than a predetermined distance, thereby providing a transparent electrode ( Improve the discharge holding voltage and discharge start voltage characteristics that are problematic when using 200a and 200b).

4A is a diagram illustrating a top electrode structure of a three-electrode AC surface discharge plasma display panel according to a second embodiment of the present invention. As shown in FIG. 4A, the second auxiliary electrode 510 is formed to protrude in the cell center direction from the bus electrodes 100a ₂ and 100b _{1 that} are close to the cell center direction among the two bus electrodes 100a and 100b.

4B is a diagram illustrating a top electrode structure of a three-electrode AC surface discharge type plasma display panel according to a third embodiment of the present invention. As shown in FIG. 4B, the second auxiliary electrode 510 is floating between the bus electrodes 100a ₂ and 100b ₁ close to the cell center of the two bus electrodes 100a and 100b and spaced apart from each other in the cell center direction. Electrode. The second auxiliary electrode 510 makes the discharge generated in the discharge gap 400 more efficiently used for phosphor emission. Thus, the brightness and the efficiency are improved.

As described above, the technical configuration of the present invention described above will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. .

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, in the electrode structure of the plasma display panel, the transparent electrode is not formed, and the electrode structure is formed only by the bus electrodes for scanning and sustain, thereby reducing the manufacturing cost and maintaining the discharge when a transparent electrode is used. By reducing the voltage and the discharge start voltage characteristics, there is an effect that can improve the brightness and efficiency or driving characteristics.

Claims (3)

In a plasma display panel including a scan electrode and a sustain electrode positioned on an upper substrate, Wherein the scan electrode and the sustain electrode are each formed of two bus electrodes, and the two bus electrodes are connected by a first auxiliary electrode. The method of claim 1, And a bus electrode close to the cell center of the two bus electrodes includes a second auxiliary electrode protruding in the cell center direction. The method of claim 1, And a floating electrode spaced apart from the bus electrode close to the cell center of the two bus electrodes by a predetermined distance in the cell center direction.

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