KR100692809B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a plasma display panel. In the plasma display panel of the present invention, there is provided a plasma display panel having a long column structure, the projections protruding toward the discharge space, the transparent electrodes being formed so that the interval between the projections is about 300um; Bus electrodes electrically connected to the transparent electrodes, respectively. As described above, the present invention improves the overall driving efficiency of the plasma display panel by maintaining the luminous efficiency while lowering the driving voltage by improving the electrode structure of the front column in the plasma display panel having a long column structure. There is.

Plasma Display Panel, Transparent Electrode, Projection

Description

Plasma Display Panel {Plasma Display Panel}

1 illustrates an electrode structure of a long column structure plasma display panel.

2A, 2B, and 2C are diagrams showing discharge initiation and discharge retention principles of the long column structure plasma display panel shown in FIG.

3 illustrates an electrode structure of a plasma display panel according to an exemplary embodiment of the present invention.

4 is a view showing a simulation result of the light output distribution according to the electrode structure.

5 is a view comparing various discharge characteristics based on the simulation result of FIG.

6 illustrates an electrode structure of a plasma display panel according to another embodiment of the present invention.

***** Explanation of symbols for the main parts of the drawing *****

10: gap between transparent electrodes 20: gap between upper and lower plates

100: bus electrode 200: transparent electrode

210: scan electrode 220: sustain electrode

230: address electrode 300: partition wall

400: discharge 500: transparent electrode protrusion

600: discharge ignition 700: positive column region transition

710: negative glue discharge region
800: Well-developed positive column range

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having a long column structure in which light emission efficiency is improved while lowering a driving voltage by improving an electrode structure of a front panel.

In general, a plasma display panel (hereinafter, referred to as a 'PDP') includes a partition wall formed between a front glass and a back glass of soda-lime glass, each unit cell. When an inert gas containing a small amount of xenon (Xe) is discharged by a high frequency voltage, using Ne, Helium, or a mixture of Neon and Helium (Ne + He) as the main discharge gas. In addition, 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 gap 10 between the transparent electrodes 200 has a discharge period of 300 μm, a positive column region exists between the transparent electrodes.

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 200 is 300 μm or more in order to enlarge such a 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. Then, when a negative voltage is applied to the scan electrode 210, the gap 10 between the transparent electrode 200 of the upper plate is larger than the gap 20 between the upper plate and the lower plate, so that the scan electrode 210 and the lower plate of the upper plate The weak discharge 600 is generated between the address electrodes 230.

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 the diffusion of the positive column 800 region, the scan electrode 210 and the scan electrode 210 are 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.

In the case of the plasma display panel having a long column structure as described above, the luminous efficiency can be increased, while the distance between the transparent electrodes of the panel is increased to 300 μm or more, thereby increasing the voltage for maintaining the discharge of the discharge space. In addition, there is a problem that the discharge start voltage increases.

The present invention is to solve the above problems, and to provide a plasma display panel that can lower the discharge start voltage, the discharge sustain voltage by modifying the shape of the transparent electrode of the long column (Long Column) structure.

delete

The present invention provides a plasma display panel for achieving the above object, in the long column structure plasma display panel, protrusions protruding toward the discharge space are formed, and each of the transparent electrodes formed such that the interval between the protrusions is about 300um; ; And a bus electrode electrically connected to the transparent electrode, respectively.
According to such a feature, the protruding portion of the transparent electrode is different from the horizontal length and the vertical length.
According to such a feature, the protrusion of the transparent electrode is formed on only one of the electrodes of the scan electrode or the sustain electrode.
According to this feature, at least one protrusion of the transparent electrode is formed on each transparent electrode.
According to this feature, the transparent electrode is formed separately for each cell.

delete

Hereinafter, with reference to the drawings will be described an embodiment according to the present invention;

<Example 1>

3 is a diagram illustrating an electrode structure of a plasma display panel according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the present invention has a long column structure in which the transparent electrode 200 protrudes toward the discharge space while the distance 10 between the transparent electrodes 200 is maintained at 300 μm or more. It is characterized by including.

Since the protrusion 500 is present, the distance 10 between the transparent electrodes 200 may be increased, thereby increasing the discharge voltage.

Therefore, due to the long column structure, the driving efficiency can be increased by preventing the increase of the discharge voltage while increasing the luminance.

In addition, the present invention is characterized in that the horizontal length and the vertical length of the projection 500 of the transparent electrode 200 are different from each other.

4 is a view showing a simulation result of the light output distribution according to the electrode structure.

The size of the protrusion 500 in the improved structure shown in FIG. 4 is 50 um in width and 60 um in length.

In the conventional structure, since the distance between the transparent electrodes 200 is greater than 300um, it can be seen that the discharge space is wide between the two electrodes, and in the improved structure, the discharge space is narrowed due to the presence of the protrusion 500. At this time, the distance between the protrusions 500 is about 300um. That is, even when the distance between the transparent electrodes is widened to 300um or more, the distance (about 300um) at which the positive column area can be generated by the protrusion 500 is adjusted.

Therefore, it can be confirmed through the numerical value of FIG. 5 that the distance between the transparent electrodes is narrowed and thus the voltage can be lowered when the discharge is started or the discharge is maintained.

5 is a view comparing various discharge characteristics based on the simulation result of FIG. 4.

In FIG. 5, numerical values in parentheses of the electrode structure indicate the size (um x um) of the protruding electrode. The existing structure refers to a plasma display panel having a long column structure having no protrusion on the transparent electrode, and the improved structure refers to a plasma display panel having a long column structure having a protrusion on the transparent electrode.

As shown in Figure 5,

In the conventional structure without the protrusion, the discharge start voltage is 373.2 V and the luminance is 3533.4 cd / m ² .

In the case of the improved structure including the protrusion having a length of 80 μm and the width of 60 μm, the discharge start voltage is 312.9 V and the luminance is 4014.1 cd / m ² .

In the case of the improved structure including the protrusion having a length of 40 μm and the width of 60 μm, the discharge start voltage is 344.0 V and the luminance is 3875.5 cd / m ² .

5, it can be seen that the improved structure having the protrusion has higher luminance and lower discharge start voltage than the conventional structure without the protrusion.

In addition, it can be seen that the longer the protruding length, the lower the discharge voltage and the higher the luminance.

<Example 2>

The protrusion 500 according to the present invention is characterized in that any one of a square, a rectangle, and a triangle.

That is, since the shape of the protrusion 500 may be modified in various forms, the panel may be manufactured by the protrusion 500 having a shape suitable for displaying a desired luminance by the producer of the plasma display panel, and the driving part is provided because the protrusion 500 is provided. The effect of lowering the voltage can also be obtained.

<Example 3>

The protrusion 500 according to the present invention is characterized in that it is formed on only one of the electrodes of the scan electrode 210 or the sustain electrode 220.

In addition, the scan electrode 210 and the sustain electrode 220 is characterized in that formed on both.

That is, the protrusion 500 may be formed only on the scan electrode 210 or the sustain electrode 220 on the transparent electrode 200 of the plasma display panel, and the protrusions may be formed on both the scan electrode 210 and the sustain electrode 220. 500), the manufacturer can adjust the driving efficiency to display the desired brightness.

In addition, the width of the protrusion 500 formed on the scan electrode 210 is different from the width of the protrusion 500 formed on the sustain electrode 220.

In addition, the length of the protrusion 500 formed on the scan electrode 210 may be different from the length of the protrusion 500 formed on the sustain 220 electrode.

As such, since the protrusions 500 may be differently formed between the scan electrode 210 and the sustain electrode 220, the producer of the plasma display panel may implement the protrusions 500 having various shapes for each electrode in order to obtain desired luminance. Can be.

<Example 4>

The protrusion 500 according to the present invention is characterized in that at least one protrusion 500 is formed on the transparent electrode.

Since at least one protrusion 500 facing the discharge space may be formed on the transparent electrode 200, the plasma display panel may be manufactured in a form most suitable for displaying a desired brightness by controlling the number of protrusions 500. Do.

<Example 5>

6 is a diagram illustrating an electrode structure of a plasma display panel according to another exemplary embodiment of the present invention.

The transparent electrode 200 according to the present invention is characterized in that the transparent electrode 200 is separated for each cell. That is, in addition to the method of manufacturing the plasma display panel in a form in which the transparent electrodes 200 are connected to each cell, each of the transparent electrodes 200 is manufactured by dividing the cells.

As a result, high luminance can be generated for each cell, and the desired luminance can be maintained while further lowering the discharge start voltage and the discharge sustain voltage.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof.

Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following 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, the present invention can improve the overall driving efficiency of the plasma display panel by maintaining the luminous efficiency while lowering the driving voltage by improving the electrode structure of the front column in the plasma display panel having a long column structure. It has an effect.

Claims (9)

In the long column structure plasma display panel, Projections protruding toward the discharge space, the transparent electrodes being formed such that the interval between the projections is 300 um; And a bus electrode electrically connected to the transparent electrode, respectively. The method of claim 1, The protrusion of the transparent electrode has a horizontal length and a vertical length different from each other. delete The method of claim 1, The protrusion of the transparent electrode is formed on only one electrode of the scan electrode or the sustain electrode. delete delete delete The method of claim 1, At least one protrusion of the transparent electrode is formed on each transparent electrode. The method of claim 1, And the transparent electrode is formed separately for each cell.

Images