JP3698856B2 - Plasma display panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a surface discharge AC plasma display panel.
[0002]
[Prior art]
Various structures of plasma display panels (hereinafter referred to as PDPs) have been proposed, even if they are limited to AC drive type PDPs (hereinafter referred to as ac-PDPs). FIG. 14 is a perspective view of an ac-PDP structure called a surface discharge type that is typically used at present, and FIG. 15 is a cross-sectional view thereof. In these drawings, 1 is a front substrate, 2 is a back substrate, and these two substrates 1 and 2 are arranged facing each other, and a discharge space 3 is formed between them. The discharge space 3 is filled with several hundred Torr of a mixed gas of a rare gas such as xenon (Xe) and another rare gas as a gas that generates ultraviolet rays by discharge.
[0003]
Barriers called ribs 4 are formed on the back substrate 2 in parallel at a pixel pitch. Between the ribs 4, parallel electrode groups 5 called write electrodes are provided perpendicular to the sustain electrodes, and a phosphor 6 is applied thereon. The rib 4 serves as a barrier for electrically and optically separating the pixels from each other and as a spacer for keeping the front substrate 1 and the rear substrate 2 at a constant interval. As shown in FIG. 14, the rib 4 may have a stripe shape or a matrix shape.
[0004]
As shown in FIG. 16, the front substrate 1 is formed with a pair of two electrodes. The electrodes constituting the electrode pair are referred to as an X electrode 7 and a Y electrode 8, respectively, and are arranged in parallel to each other at a pixel pitch interval and in a direction perpendicular to the writing electrode 5 and the rib 4. Since these X electrode 7 and Y electrode 8 are mainly used as electrodes for maintaining display, they are referred to herein as sustain electrodes, and the X electrodes and Y electrodes are collectively referred to as sustain electrode pair 9. A gap c (hereinafter referred to as a discharge gap c) between the X electrode 7 and the Y electrode 8 is determined so that discharge can be performed at a low voltage. On the other hand, the distance b between the lines (hereinafter referred to as the inter-line gap b) is determined to take a value sufficiently wider than the discharge gap c so that no discharge occurs. A dielectric layer 11 is formed on these electrodes, and an MgO film 12 is formed on the dielectric surface. MgO is excellent in sputter resistance and thus protects the dielectric, and has a high secondary electron emission coefficient, and therefore lowers the discharge start voltage.
[0005]
Next, the principle of light emission will be described. When a potential difference occurs between the sustain electrodes 9 of the front substrate 1 and discharge occurs, ultraviolet rays are generated, and the phosphor 6 is excited by the ultraviolet rays to generate visible light. The generated visible light is taken out through the front substrate 1. Since the reflected light of the phosphor is seen from the display surface, it is generally called a reflective type. Further, the discharge is generated on the sustain electrode near the center of the sustain electrode pair 9, and moves toward the outside of the electrodes with time. For this reason, a certain amount of electrode area is required in order to sufficiently generate ultraviolet rays by discharge.
[0006]
As described above, in the reflective PDP, the sustain electrodes 7 and 8 have a role of supplying a current for the discharge and a function of extracting visible light generated from the phosphor to the display surface in addition to the role of generating the discharge. Bear. However, a material that sufficiently satisfies both the low resistance, which is a necessary condition for supplying a current, and the high transmittance, which is a necessary condition for efficiently extracting visible light on a display surface, is used as a sustain electrode material. Not found. Therefore, in the conventional PDP, as shown in FIG. 16, the sustain electrodes 7 and 8 have a relatively high resistance but a transparent electrode 10 having a high visible light transmittance and a mother having a low resistance but no visible light transmittance. It consists of two layers of electrodes 11. Here, the transparent electrode 10 plays a role as a discharge electrode and a role of taking out visible light to the outside, and the mother electrode 11 plays a role as a discharge electrode and a role as an electrode for supplying current. Take on.
[0007]
As a material of the transparent electrode 10, generally ITO, SnO₂An oxide film such as is used. ITO is mainly formed by physical vapor deposition such as vacuum vapor deposition, sputtering, ion plating, etc., and SnO₂The film is formed mainly by a chemical vapor deposition method (CVD method).
[0008]
The mother electrode 11 is usually formed by a thin film process using a low-resistance metal material typified by a three-layer structure such as Cr—Cu—Cr, Cr—Al—Cr or the like. Further, it may be formed by a thick film printing process using a printing paste such as gold or silver.
[0009]
The width of the mother electrode 11 is determined by the length in the long side direction and the length in the short side direction of the sustain electrodes 7 and 8 at the time of designing in consideration of a voltage drop due to resistance. Generally, 30-50% of the sustain electrode width is the mother electrode width.
[0010]
[Problems to be solved by the invention]
In the conventional surface discharge type AC-PDP, although the mother electrode 11 consumes electric power due to discharge, it does not transmit light, thus reducing the light extraction efficiency. For this reason, the ratio of the luminance generated with respect to the input power, that is, the improvement of the light emission efficiency has been hindered.
[0011]
An object of the present invention is to provide a plasma display panel having high luminous efficiency by reducing discharge power consumed by a mother electrode, improving light utilization efficiency, and solving the above-mentioned problems.
[0012]
[Means for Solving the Problems]
  In view of the above-described object, the present invention is a reflective surface discharge plasma display panel comprising a front substrate, a transparent electrode having a high visible light transmittance, and a mother electrode having a low resistance, disposed on the front substrate. A plurality of sustain electrodes, wherein the transparent electrode and the mother electrode constituting the sustain electrode of the substrate are separated and arranged in parallel at a predetermined interval, and the separated transparent electrode and the mother electrode are connected to each other In the sustain discharge, the surface discharge is terminated with the transparent electrode, and the surface discharge is controlled not to spread onto the mother electrode. The sustain electrode of the front substrate is an extension of the short electrode. In the plasma display panel, a cutout portion or a hole is formed in the transparent electrode on the line.
  With such a configuration, the discharge is limited to only the transparent electrode and does not reach the mother electrode, so that the mother electrode does not consume discharge power and the ratio of light shielded by the mother electrode is reduced. . In addition, since there is an electrodeless portion between the transparent electrode and the mother electrode, the discharge ends within the area of the transparent electrode and does not reach the mother electrode.Furthermore, even if the alignment of the front and back substrates is shifted and the short-circuit electrode protrudes into the discharge space, the discharge path to the mother electrode is lengthened by the notch or hole on the transparent electrode, so that the discharge is transparent. Does not reach the mother electrode through the short-circuit electrode.
[0014]
  Further, an externally applied voltage applied to the sustain electrode to generate a discharge and the predetermined interval between the transparent electrode and the mother electrode cause a surface discharge to be terminated at the transparent electrode during the sustain discharge and the mother electrode. It is set in a range where the surface discharge does not spread over the electrode.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
An embodiment of the present invention will be described. FIG. 1 shows the positional relationship between the shape of the sustain electrodes 7 and 8 of the front substrate 1 and the ribs 4 of the rear substrate according to one embodiment of the present invention. The present invention relates to the sustain electrode of the front substrate, and the rear substrate is the same as the conventional structure as shown in FIG. The same applies to other embodiments described below.
[0022]
Each of the sustain electrodes 7 and 8 on the front substrate 1 is orthogonal to each of the sustain electrodes 7 and 8 and a pair of the transparent electrode 10 and the mother electrode 11 that are arranged in parallel with each other at a predetermined distance a. The transparent electrode 10 and the mother electrode 11 forming a pair are arranged so as to overlap the ribs 4 of the back substrate 2. The short-circuit electrodes 12 are connected.
[0023]
In the following, experimental results will be specifically shown and described in comparison with a conventional PDP. The conditions of the panel used for the experiment are shown. In both the present embodiment and the conventional PDP, the sealed gas is neon (Ne) + xenon (Xe) (5%), the pressure is 500 Torr, and the sustain electrode pair pitch is 1260 μm. In the PDP of the present embodiment, the transparent electrode width is 200 μm, the mother electrode width is 85 μm, and the distance a between the transparent electrode 10 and the mother electrode 11 is 215 μm. In the conventional PDP, the sustain electrode width is 300 μm, and the mother electrode width is 130 μm. The conditions for configuring the other panels are the same in both the conventional example and the present embodiment.
[0024]
FIG. 2 shows the relationship between externally applied voltage and luminance. The frequency of the sustain pulse at the time of measurement is 5 kHz. Here, what should be noted is not the difference in the absolute value of the luminance, but the rate of increase in luminance with respect to the voltage. In the conventional PDP, the luminance increases in proportion to the voltage. On the other hand, in the PDP of the present embodiment, there is a large difference in the rate of increase around 210V. This indicates that there are two types of discharge modes. The difference in the discharge mode is shown in the schematic diagram of the discharge region in FIG. At a voltage of 210 V or less, the discharge is limited to the transparent electrode 10, but when the voltage is 210 V or more, the discharge spreads to the mother electrode 11. In the present embodiment, the use of a discharge mode in which the former discharge is limited only to the transparent electrode 10 achieves high luminous efficiency.
[0025]
Next, the light extraction efficiency is compared by the emission intensity distribution of the cells. Here, the light extraction efficiency refers to a ratio of luminance when the mother electrode 11 is present to luminance when the mother electrode 11 is not present.
[0026]
4 and 5 show the emission intensity distribution on the display surface in the conventional example and the PDP in the present embodiment, respectively. The light emission intensity distribution is a result of measurement so that the sustain electrodes 7 and 8 are cut longitudinally with respect to the horizontal center of the cell (rib 4 and the center line of the rib 4). The externally applied voltage at the time of measurement is 180 V where the discharge is limited only to the transparent electrode 10 in the PDP of the present embodiment.
[0027]
First, a conventional PDP will be described.
The left and right peaks in FIG. 4 are the light emission intensity distribution due to the discharge of the sustain electrode pair, and light emission can be seen also in the region between the sustain electrode pair without the electrode and the sustain electrode pair due to the leak light of the sustain electrode pair. . The recessed portions on both sides of the peak on the sustain electrode pair are portions where visible light is shielded by the mother electrode 11. The emission intensity on the electrode is higher at the center of the electrode pair and decreases as the distance from the center increases. Therefore, in the conventional PDP, the position of the mother electrode 11 is arranged on the sustain electrodes 7 and 8 as far as possible from the center of the sustain electrode pair having the highest emission intensity in consideration of the light extraction efficiency.
[0028]
The light emission intensity distribution when it is assumed that the mother electrode 11 is not formed is shown by a dotted line in FIG. The ratio of the total light emission intensity (solid line) in the cell with the mother electrode 11 to the total light emission intensity (dotted line) in the cell with only the transparent electrode 10 not forming the mother electrode 11, that is, the light extraction efficiency is 70 to 80%. The mother electrode 11 shields 20 to 30% of light.
[0029]
On the other hand, in the PDP according to the present embodiment, the mother electrode 11 is arranged away from the transparent electrode 10 that emits discharge light, so that it is shielded by the mother electrode 11 as clearly shown in FIG. The ratio is almost 0%. Therefore, the light extraction efficiency is improved by about 20 to 30% compared to the conventional structure.
[0030]
FIG. 6 shows the relationship between the externally applied voltage and the light emission efficiency. Luminous efficiency is a ratio of luminance to electric power consumed by discharge, and is expressed by the following equation.
η = πLS / P
Here, η is the luminous efficiency, π is the circular ratio, L is the luminance, and P is the discharge power.
Luminous efficiency was measured with a burst waveform in which a pause period was provided for a continuous pulse having a frequency of 125 kHz and a pulse width of 3 μsec in order to approximate actual driving conditions. The average frequency is 30 kHz.
The luminous efficiency of this embodiment is about 22% higher than the luminous efficiency of the conventional example. This is because, as shown by the light emission intensity distribution, the light extraction efficiency has improved, and the ratio of luminance to the same power has increased.
[0031]
In order to obtain the above experimental results, the discharge mode must be limited to the transparent electrode 10. This is because when the discharge spreads to the mother electrode 11, both power and luminance increase, but the ratio of shielding light by the mother electrode 11 increases, and the light extraction efficiency decreases. The conditions for the discharge to jump over the gap a and reach the mother electrode 11 include, as shown in FIG. 2, the pulse width, the frequency, the gas composition, the length of the gap a, etc. in addition to the sustain voltage applied during the sustain discharge. Varies depending on conditions. In the present embodiment, the panel conditions and the driving conditions have been specifically described with numerical values. However, the parameters listed above are not limited to the numerical values used in the experiment, and are numerical values according to the principle of the present invention. Of course.
[0032]
Next, the configuration of the short-circuit electrode 12 will be described.
As shown in FIG. 1, the short-circuit electrode 12 is arranged so as to overlap the rib 4 of the back substrate, so that there is no discharge space on the short-circuit electrode 12 and the discharge generated in the transparent electrode 10 is short-circuited. Thus, the mother electrode 11 is not reached. In addition, the width of the short-circuit electrode 12 in the sustain electrode of the front substrate 1 is preferably set to be equal to or less than the width of the rib 4 of the rear substrate. By doing so, the short-circuit electrode 12 does not protrude into the discharge space 3, and the discharge generated in the transparent electrode 10 can be prevented from reaching the mother electrode 11 through the short-circuit electrode 12.
[0033]
In FIG. 1, the short-circuit electrode 12 is configured to protrude in a convex shape from the mother electrode 11, but conversely, the short-circuit electrode 12 may be provided in a convex shape from the transparent electrode 10, or the mother electrode 11 and the transparent electrode 10 may be provided with a convex short-circuit portion and overlap each other. Each of them has an advantage. When the convex short circuit portion is provided on the mother electrode 11, it is advantageous for lowering the resistance. When the convex short circuit portion is provided on the transparent electrode 10, Even if the alignment with the rear substrate is shifted, the light extraction efficiency of the front substrate 1 does not extremely decrease.
[0034]
Embodiment 2. FIG.
When the definition is increased while taking the structure as in the first embodiment, the gap b between the sustain electrode pair and the sustain electrode pair is narrowed. If the sustain electrode pairs are arranged in the order of the X electrode 7 and the Y electrode 8 from the first line, the X electrode 7 and the Y electrode 8 have a potential difference when a voltage is applied to the discharge gap c at the center of the sustain electrode pair. Since the same potential difference is generated with respect to the inter-line gap b, erroneous discharge is likely to occur as the inter-line gap b decreases. If erroneous discharge occurs in the gap b, the independence between the lines is lost, and the image cannot be displayed.
[0035]
Here, in order to describe the second embodiment, a method for displaying an image of a PDP will be briefly described.
In general, a driving sequence for displaying an image on a PDP is roughly divided into a writing period and a sustaining period. During the writing period, scanning is performed for each line, and the selected cell is determined. At this time, since either the X electrode 7 or the Y electrode 8 of the sustain electrodes acts as a scanning electrode, the electrode must have an independent potential for each line. In the next sustain period, the cells selected in the write period are discharged all at once. Therefore, the X electrode 7 and the Y electrode 8 can be set to the same potential on all the lines at the respective electrodes. Therefore, in either period, either one of the X and Y electrodes 7 and 8 can be shared by all lines. Hereinafter, the scanning electrode is described as the X electrode at the time of writing, but there is no problem even if the Y electrode is used as the scanning electrode.
[0036]
In the second embodiment, as shown in FIG. 7, the arrangement order of the X electrode 7 and the Y electrode 8 forming the sustain electrode pair is alternately changed for each line. For example, the first line is an X electrode 7 followed by a Y electrode 8, and the second line is an Y electrode 8 followed by an X electrode 7. With such an arrangement, since the X electrode 7 and the Y electrode 8 are arranged with respect to the discharge gap c, there is a potential difference and discharge can be performed. Since the electrode 7 and the X electrode 7 or the Y electrode 8 and the Y electrode 8 are arranged, there is no potential difference, so that no discharge occurs.
[0037]
For this reason, the gap b between the lines can be narrowed, so that the width of the gap a can be sufficiently widened so that the surface discharge does not reach the mother electrode 11 from the transparent electrode 10 even in a high definition panel.
[0038]
Further, the gap b can be further narrowed, and the mother electrode 11 of the Y electrode 8 can be integrated as shown in FIG. One Y electrode mother electrode 11 is in charge of the transparent electrode 10 of the Y electrode 8 for two lines.
[0039]
In this case, the distance d between the transparent electrode 10 and the mother electrode 11 in the X electrode 7 and the distance e between the transparent electrode 10 and the mother electrode 11 in the Y electrode 8 are not the same. The gaps d and e serve to prevent the discharge generated at the transparent electrode 10 from spreading to the mother electrode 8, but the widths of the gaps d and e are preferably equal in terms of discharge control. In the structure shown in FIG. 9, the center of the transparent electrode pair is adjusted so that the distance between the transparent electrode 10 and the mother electrode 11 is equal.
[0040]
Embodiment 3 FIG.
The structural diagram described in the third embodiment relates to measures against misalignment of the front substrate 1 and the rear substrate 2.
[0041]
In the structure shown in the first and second embodiments, the short-circuit electrode 12 connecting the mother electrode 11 and the transparent electrode 10 needs to be disposed so as to overlap the rib 4 of the back substrate. This is because when the short-circuit electrode 12 is exposed to the discharge space 3, the discharge generated in the transparent electrode 10 is likely to reach the mother electrode 11 through the short-circuit electrode 12. However, in order to provide process redundancy, it is necessary to increase the redundancy of discharge characteristics with respect to misalignment.
[0042]
In the third embodiment, as shown in FIG. 10A, a part 10 a that is partially cut out is formed in the transparent electrode 10 on the extension line of the part where the short-circuit electrode 12 is provided.
[0043]
FIG. 10B shows a case where the alignment with the rib 4 of the back substrate is not shifted. The transparent electrode 10 exposed to the discharge space 3 and the mother electrode 11 are completely independent, and the discharge does not reach the mother electrode 11 if the gap a is sufficiently secured.
[0044]
When the alignment with the rib 4 of the back substrate is slightly shifted, the shape exposed in the discharge space 3 is a shape in which the transparent electrode 10 and the mother electrode 11 are partially connected as shown in FIG. Become. In this case, since the transparent electrode 10 on the extended line of the short-circuit electrode 12 has the notch 10a, there are two types of gap c, the original narrow gap c1 and the wide gap c2 due to the notch 10a of the transparent electrode 10. Since the discharge starts with the original narrow gap c1, the path from the gap where the discharge has occurred to the transparent electrode 10 is longer than when the notch 10a of the transparent electrode 10 is not provided. Therefore, the discharge is difficult to spread from the short-circuit electrode 12 to the mother electrode 11.
[0045]
Further, as shown in FIG. 11, even in the pattern in which the rectangular holes 10 b are formed in the transparent electrode 10, when the alignment with the rib 4 of the back substrate is slightly shifted, the transparent electrode 10 on the extension line of the short-circuit electrode 12 Since there is an electrodeless portion, the discharge hardly spreads to the mother electrode 11.
11A to 11C correspond to FIGS. 10A to 10C, respectively.
[0046]
In the third embodiment, the shape of the notch 10a or the hole 10b of the transparent electrode 10 is a rectangle, but any shape can be used as long as it operates in the same manner as the principle described in the third embodiment. Of course, the shape may be acceptable.
[0047]
In the first to third embodiments described so far, as a method of limiting discharge to only the transparent electrode 10 and preventing the discharge of the mother electrode 11, a method of separating the distance between the transparent electrode 10 and the mother electrode 11 is adopted. It was. In the following fourth and fifth embodiments, a method of controlling the discharge only to the transparent electrode 10 without changing the positional relationship between the transparent electrode 10 and the mother electrode 11 will be described.
[0048]
Embodiment 4 FIG.
In the structure according to the fourth embodiment shown in FIG. 12, the thickness of the dielectric layer 13 on the mother electrode 11 is formed larger than the thickness of the dielectric layer 13 on the transparent electrode 10. Since the dielectric layer 13 is thick on the mother electrode 11, it is difficult to discharge. Therefore, the discharge generated at the center of the sustain electrode pair spreads toward the outside of the transparent electrode 10, but ends only on the transparent electrode 10 without spreading to the mother electrode 11.
Therefore, the light emission efficiency is improved for the same reason as described in the first embodiment.
In the fourth embodiment, a film 14 such as MgO for reducing the discharge start voltage is provided on the entire surface of the dielectric layer 13.
[0049]
Embodiment 5. FIG.
In the structure according to the fifth embodiment shown in FIG. 13, the film 14 provided on the dielectric layer 13 and reducing the discharge start voltage such as MgO is not formed on the mother electrode 11. The film 14 made of MgO or the like formed on the dielectric layer 13 has a high secondary electron emission coefficient and lowers the discharge start voltage. In the fifth embodiment, since the coating 14 that lowers the discharge start voltage such as MgO is not formed on the mother electrode 11, the mother electrode 11 is harder to discharge than the transparent electrode 10 with the coating 14. Therefore, the discharge generated in the vicinity of the center of the sustain electrode pair spreads outward on the transparent electrode 10 but ends only on the transparent electrode 10 without spreading to the mother electrode 11.
Therefore, the light emission efficiency is improved for the same reason as described in the first embodiment.
[0050]
In the fifth embodiment, the secondary electron emission coefficient on the surface of the dielectric layer 13 on the mother electrode 11 is made smaller than on the transparent electrode 10 with or without the coating 14 that reduces the discharge start voltage such as MgO. Of course, any material other than MgO may be used as the material for reducing the discharge start voltage as long as the secondary electron emission coefficient can be similarly varied.
[0051]
In the fourth and fifth embodiments, the transparent electrode 10 and the mother electrode 11 are not separated. However, as in the first, second, and third embodiments, the transparent electrode 10 and the mother electrode 11 are separated. Of course, the present invention can be applied to the structure.
[0052]
【The invention's effect】
Since the present invention is configured as described above, there are excellent effects as described below.
[0053]
  Of this inventionAccording to the plasma display panel, by disposing the transparent electrode and the mother electrode separated by a certain distance, the discharge is limited to only the transparent electrode and does not spread to the mother electrode, so the discharge power is not consumed by the mother electrode, In addition, since the ratio of light shielded by the mother electrode is reduced, the light use efficiency can be improved and the light emission efficiency can be improved.In addition, since the transparent electrode and the short-circuit electrode of the mother electrode are arranged so as to overlap with the ribs of the back substrate, the discharge generated in the transparent electrode does not spread to the mother electrode through the short-circuit electrode. Then, no discharge power is consumed.
[0055]
  Also,The short-circuit electrode is arranged in a direction perpendicular to the sustain electrodeBack substrateSince the discharge space does not exist on the short-circuit electrode, the discharge can be prevented from spreading from the transparent electrode to the mother electrode through the short-circuit electrode.
[0056]
  Also,Since the width of the short-circuit electrode on the sustain electrode of the front substrate is less than the width of the rib, the short-circuit electrode does not protrude into the discharge space, and the discharge generated in the transparent electrode is prevented from reaching the mother electrode through the short-circuit electrode can do.
[0057]
  Also,Since the arrangement order of the X electrode and the Y electrode forming the sustain electrode pair of the front substrate is alternately changed for each line, there is no potential difference with respect to the gap between the lines, and the discharge between the lines does not occur. Therefore, even on a high-definition screen with a small line pitch, the distance between the transparent electrode and the mother electrode can be widened, and therefore the discharge can be easily controlled only to the transparent electrode.
[0058]
  Also,Among the sustain electrode pairs on the front substrate, in the electrode that is not used as the scan electrode in the writing period, the single electrode is used for the two lines of the sustain electrode pair. Therefore, the distance between the mother electrode and the transparent electrode can be widened, so that the discharge can be controlled only to the transparent electrode more easily.
[0059]
  Also,In the sustain electrode of the front substrate, in the structure where the cutout part or hole is formed in the transparent electrode on the extension line of the short circuit part, even if the alignment of the front substrate and the back substrate is shifted and the short circuit electrode protrudes into the discharge space, the transparent electrode The upper cutout portion or hole lengthens the discharge path to the mother electrode and makes it difficult for the discharge to propagate from the transparent electrode to the mother electrode through the short-circuit electrode, so that the discharge can be controlled only to the transparent electrode.
[0060]
  Also,In the sustain electrode on the front substrate, the dielectric layer on the mother electrode is made thicker than the dielectric layer on the transparent electrode, so the discharge on the mother electrode is less likely to occur than on the transparent electrode. can do.
[0061]
  Also,Since the sustain electrode on the front substrate is not provided with a film that reduces the discharge start voltage on the mother electrode, the secondary electron emission coefficient on the mother electrode is lower and the discharge start voltage is higher than on the transparent electrode. The discharge can be controlled only on the transparent electrode.
[Brief description of the drawings]
FIG. 1 is a diagram showing the positional relationship between electrodes on a front substrate and ribs on a rear substrate of a plasma display panel according to Embodiment 1 of the present invention.
FIG. 2 is a diagram showing a relationship between applied voltage and luminance of the plasma display panel according to Embodiment 1 of the present invention and a conventional plasma display panel.
FIG. 3 is a schematic diagram for explaining a discharge mode according to the first embodiment of the present invention.
FIG. 4 is a view showing a light emission intensity distribution in a cell of a conventional plasma display panel.
FIG. 5 is a diagram showing a light emission intensity distribution in the cell of the plasma display panel according to the first embodiment of the present invention.
FIG. 6 is a diagram showing a relationship between applied voltage and luminous efficiency of the plasma display panel according to Embodiment 1 of the present invention and a conventional plasma display panel.
FIG. 7 is a diagram showing the positional relationship between electrodes on a front substrate and ribs on a rear substrate of a plasma display panel according to Embodiment 2 of the present invention.
FIG. 8 is a diagram showing the positional relationship between electrodes on a front substrate and ribs on a rear substrate of a plasma display panel according to Embodiment 2 of the present invention.
FIG. 9 is a diagram showing the positional relationship between electrodes on a front substrate and ribs on a rear substrate of a plasma display panel according to Embodiment 2 of the present invention.
FIG. 10 is a diagram showing the positional relationship between electrodes on a front substrate and ribs on a rear substrate of a plasma display panel according to Embodiment 3 of the present invention.
FIG. 11 is a diagram showing a positional relationship between electrodes on a front substrate and ribs on a rear substrate of a plasma display panel according to Embodiment 3 of the present invention.
FIG. 12 is a cross-sectional view of a front substrate of a plasma display panel according to Embodiment 4 of the present invention.
FIG. 13 is a sectional view of a front substrate of a plasma display panel according to a fifth embodiment of the present invention.
FIG. 14 is a perspective view showing a conventional plasma display.
FIG. 15 is a cross-sectional view showing a conventional plasma display.
FIG. 16 is a diagram showing a positional relationship between electrodes on a front substrate and ribs on a rear substrate of a conventional plasma display.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front substrate, 2 Back substrate, 3 Discharge space, 4 Rib, 5 Writing electrode, 6 Phosphor, 7 Sustain electrode (X electrode), 8 Sustain electrode (Y electrode), 9 Sustain electrode pair, 10 Transparent electrode, 11 Mother electrode, 12 Short-circuit electrode, 13 Dielectric layer, 14 Coating for lowering discharge start voltage.

Claims (2)

In reflective surface discharge plasma display panels,
A front substrate;
A sustain electrode that is disposed on the front substrate and includes a transparent electrode having a high visible light transmittance and a mother electrode having a low resistance;
The transparent electrode and the mother electrode constituting the sustain electrode of the substrate are arranged in parallel with a predetermined interval, and are composed of a plurality of short-circuit electrodes that connect the separated transparent electrode and the mother electrode. In the sustain discharge, the surface discharge is terminated with the transparent electrode, and the surface discharge is controlled not to spread over the mother electrode, and the sustain electrode of the front substrate is connected to the transparent electrode on the extension line of the short-circuit electrode. A plasma display panel characterized by forming a notch or a hole.   An externally applied voltage applied to the sustain electrode to generate a discharge and the predetermined interval between the transparent electrode and the mother electrode cause a surface discharge to be terminated at the transparent electrode at the time of the sustain discharge. 2. The plasma display panel according to claim 1, wherein the plasma display panel is set in a range in which the surface discharge does not spread to a maximum.

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