JP3460596B2 - Plasma display panel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel used for displaying images in computers, televisions and the like.

[0002]

2. Description of the Related Art A conventional PDP generally has a structure as shown in FIG.

In FIG. 9, a strip-shaped electrode group 19a and a strip-shaped electrode group 19b are formed on the front substrate 11, and the electrode groups 19a and 19b are covered with a dielectric glass layer 17 made of lead glass or the like. , The surface of the dielectric glass layer 17 is M
It is covered with a protective layer 18 made of a gO vapor deposition film or the like. A strip-shaped data electrode group 14 and an insulating layer 13 made of lead glass or the like covering the surface are provided on the rear substrate 12, and a partition wall 15 is provided thereon. The front substrate 11 and the rear substrate 12 are combined so that their electrode groups are orthogonal to each other. The partition wall 15 is adhered to the rear substrate 12 and is in contact with the front substrate 11. The front substrate 11 and the rear substrate 12 face each other and are sealed in parallel with each other by the partition wall 15 at intervals of about 100 to 200 μm.

By selectively applying a voltage between the electrode groups 19a and 19b on the front substrate 11 and the data electrode group 14 on the rear substrate 12, the electric charges generated by the gas discharge at the intersections of the selected electrodes are removed. After the address operation of accumulating on the dielectric glass 17 and accumulating the information of the pixel for one screen by scanning the electrode to which the voltage should be applied, an alternating current is applied between the electrode group 19a and the electrode group 19b on the front substrate 11. The sustain discharge operation of applying the pulse voltage causes the discharge cells selected in the address operation to emit light all at once, thereby displaying an image. Discharge is performed on the front substrate 11 and the rear substrate 1
2, and because it occurs in the space isolated by the partition wall 15,
The luminescence does not diffuse. That is, the partition wall 15 has the front substrate 11
It has the purpose of defining the space between the rear substrate 12 and the rear substrate 12, and the purpose of high-resolution display.

Further, when performing color display, the phosphor 16 is applied to the peripheral portion of the discharge space which is blocked by the barrier ribs. Since the phosphor is performed by converting the ultraviolet rays generated by the discharge into visible light, the phosphors of the three primary colors red (R), green (G), and blue (B) are used, and the emission intensity by each is changed. With proper adjustment, color display is possible.

As the discharge gas, in the case of monochromatic display, a mixed gas centered on neon, which emits light in the visible range during discharge, and in the case of color display, the emission gas during discharge is in the ultraviolet range. A mixed gas centered on xenon is selected. As for gas pressure, assuming the use of PDP under atmospheric pressure,
In order to reduce the pressure inside the substrate against the external pressure, normally 2
It is set in the range of about 00 Torr to 500 Torr. FIG. 10 shows an electrode matrix diagram of a conventional PDP.

Next, a conventional PDP driving method will be described with reference to FIG. In FIG. 11, first, electrode group 1
An initialization pulse is applied to 9b1 to 19bN to initialize the wall charges in the discharge cells of the panel. Next, a scan pulse is applied to the first electrode 19a1 of the electrode group 19a, and the data electrode group 44
Lines 141 to 14M corresponding to the discharge cells for displaying
A writing pulse is simultaneously applied to the electrodes to cause a writing discharge to accumulate wall charges on the surface of the dielectric layer. Next, a scan pulse is applied to the second line electrode 19a2 of the electrode group 19a, and a line 141 corresponding to the discharge cell for displaying the data electrode group 14 is displayed.
A write pulse is applied simultaneously to 14 M to write discharge to accumulate wall charges on the surface of the dielectric layer. Then, a latent image for one screen is written by sequentially accumulating wall charges corresponding to cells to be displayed by the same continuous scanning on the surface of the dielectric layer.

Next, in order to perform sustain discharge, the data electrode group 14 is grounded, and sustain pulses are alternately applied to the electrode groups 19a and 19b, whereby wall charges are accumulated on the surface of the dielectric layer. In the cell, discharge occurs when the potential of the dielectric surface exceeds the discharge start voltage, and the main discharge of the display cell selected by the write pulse is maintained during the period in which the sustain pulse is applied (sustain period). afterwards,
By applying an erase pulse having a narrow width, incomplete discharge occurs and wall charges disappear, so that erase is performed.

[0009]

However, in the above-mentioned conventional configuration, the pitch of the discharge cells becomes narrower as the definition becomes higher and the discharge cells are strongly influenced by the adjacent discharge cells, so that the erroneous discharge easily occurs. Therefore, there is a problem that crosstalk occurs when displaying an image.

Further, in the conventional configuration, the discharge delay time at the time of applying the first sustain pulse during the sustain period and its variation are large, and the discharge probability is low, so that the flicker of the contour portion of the image during the display of a moving image is large. However, there is a problem that the image quality is significantly deteriorated.

Further, the luminous efficiency is improved by increasing the gas pressure in the discharge cell, but at the same time, the discharge start voltage is increased and the drive voltage of the PDP must be increased, which increases the load on the drive circuit. Had the problem of doing.

The present invention solves the above-mentioned conventional problems. It suppresses the mutual influence of adjacent discharge cells, eliminates crosstalk, improves the discharge delay, and lowers the discharge start voltage to reduce the drive voltage. It is intended to realize a high definition and high image quality PDP.

[0013]

To achieve the above object, the present invention provides a front substrate which is covered with a dielectric layer and has a pair of electrodes, and a data electrode having an insulating layer on the surface. A rear substrate having a group faces each other, and a discharge gas of 760 to 4000To is provided between the front substrate and the rear substrate.
A plasma display panel which is sealed at a pressure of rr and displays an image by at least a writing discharge and a sustaining discharge, having a high relative dielectric constant εr of 100 or more and 2000 or less on an electrode on at least one substrate. Layers shall be provided.

A front substrate having a pair of electrodes covered with a dielectric layer and a back substrate having a group of data electrodes having an insulating layer on the surface thereof face each other, and the front substrate A discharge gas of 760 to 400 is provided between the back substrate and the back substrate.
A plasma display panel, which is sealed at a pressure of 0 Torr and displays an image by at least a writing discharge and a sustaining discharge, having a relative dielectric constant εr of 100 or more and 2000 or more on an electrode for applying a voltage signal for selecting a discharge cell during driving
A high dielectric constant layer having the following values shall be provided.

Further, a front substrate covered with a dielectric layer and having a pair of electrodes and a rear substrate having a data electrode group provided with an insulating layer on the surface are opposed to each other, and the front substrate and A discharge gas of 760 to 400 is provided between the back substrate and the back substrate.
A plasma display panel, which is sealed at a pressure of 0 Torr and displays an image by at least a writing discharge and a sustaining discharge, having a relative dielectric constant εr of 100 or more and 2000 or less on an electrode to which a voltage for maintaining light emission during driving is applied. A high dielectric constant layer having a value shall be provided.

Further, in a plasma display panel for displaying an image by gas discharge by providing a plurality of stripe-shaped opposed electrodes covered with a dielectric between a pair of substrates, a relative dielectric constant is provided on at least one of the electrodes. εr is 100
A striped high dielectric constant layer having a value of 2,000 or more is provided.

The length W of the short side of the striped electrode is
And the short side length w of the striped high dielectric constant layer is 0.5 W
The range is ≦ w ≦ 1.5W.

Further, the high dielectric constant layer comprises at least one of group A consisting of lead, barium, strontium and lanthanum and at least one of group B consisting of titanium, zirconium, manganese, niobium and tantalum. It is assumed that it is composed of an ABO ₃ type oxide high dielectric material containing one of them as a main component.

Further, the high dielectric constant layer is at least one selected from the group A consisting of lead, barium, strontium and lanthanum and at least any one selected from the group B consisting of titanium, zirconium, manganese, niobium and tantalum. It is assumed to be composed of a mixture of an ABO ₃ type oxide high dielectric material containing one of them as a main component and glass.

A plurality of counter electrodes covered with a dielectric are provided between a pair of substrates, and a high dielectric constant layer having a relative dielectric constant εr of 100 or more and 2000 or less on at least one of the substrates. In the plasma display panel having the above, the filling pressure of the discharge gas is 760 to 4000 Torr.

A plurality of counter electrodes covered with a dielectric are provided between a pair of substrates, and a high dielectric constant layer having a relative permittivity εr of 100 or more and 2000 or less on at least one of the substrates. And the discharge gas between the substrates is a mixture of rare gases containing helium, neon, xenon, and argon. The discharge gas contains xenon in an amount of 5% by volume or less, argon in an amount of 0.5% by volume or less, and helium in an amount of less than 55% by volume.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram of a PDP according to Embodiment 1 of the present invention. In FIG. 1, a high dielectric constant layer 20 peculiar to the present invention is formed on the electrode of the front substrate 11.
Is provided.

First, in forming the front substrate 11,
A thick film silver paste is patterned as a group of electrodes 19a and 19b on the glass substrate by screen printing and baked to form Pb _(1-x) La as a high dielectric constant layer 20 on the front substrate 11 and the groups of electrodes 19a and 19b. _x Ti _{(1-x / 4)} O ₃ (PL
T) A thin film (x = 0.05 to 0.25) was formed by RF magnetron sputtering, and a MgO thin film was formed as a protective film 18 on the high dielectric constant layer 20 by electron beam evaporation.

Next, in forming the rear substrate 12,
A thick film silver paste is patterned as a data electrode group 14 on the glass substrate by screen printing and then baked to form an insulator glass paste as an insulator layer 13 on the front surface of the data electrode group 14 by a screen printing method. A partition 15 is formed on the insulator layer 13 by printing and then firing.
As a result, the thick film paste was formed by patterning by screen printing and baking, and the phosphor 16 was formed by patterning by screen printing on the side surface of the partition wall 15 and the upper portion of the insulating layer 13.

Next, the front substrate 11 and the rear substrate 12 are sealed with a glass frit and then evacuated, and a discharge gas of 50% Ne-Xe mixed gas containing 5% Xe is used.
It was enclosed at 0 Torr.

FIG. 2 shows the relationship between the dielectric film thickness of the conventional PDP and the discharge start voltage Vf. As is clear from the graph of FIG. 2, as the dielectric film thickness decreases, V
f is decreasing. However, in the conventional PDP, since the low-melting-point lead glass-based thick film dielectric layer is used as the dielectric, if the film thickness is reduced to 20 μm or less, the thickness of bubbles and foreign matters in the dielectric layer is reduced. When a low melting point lead glass-based thick film dielectric layer is used, the film thickness should be reduced to about 25 μm because the dielectric strength of the dielectric layer decreases due to defects inherent in the film process. I couldn't. Therefore, in the actual PDP, the drive voltage could only be reduced to about 180V.

Table 1 shows a comparison between the relative permittivity εr, the film thickness t and Vf of the high dielectric constant layer of the PDP having the structure according to the first embodiment and the conventional one.

[0029]

[Table 1]

By providing the high dielectric constant layer of εr = 100 on the electrode of the front plate, Vf is reduced to about 166V. Further, by providing a high dielectric constant layer with εr = 350, Vf is reduced to about 160V.

This is because the relative permittivity of the low melting point lead glass based thick film dielectric layer is about εr = 11, while the relative permittivity of the high permittivity layer is εr = 100 to 350, which is one digit. This is because the effective film thickness is reduced to about 11/100 to 11/350 because it is larger than the above.

As is clear from this, the PDP according to the first embodiment has a high dielectric constant layer and an effective film thickness of 1
Vf is reduced by decreasing the thickness to about μm, and the driving voltage is lowered by satisfying the contradictory characteristics of high breakdown voltage and low discharge start voltage, which are not possible with the conventional low melting point lead glass based dielectric layer. A highly reliable PDP can be realized.

(Second Embodiment) FIG. 3 is a block diagram of a PDP according to a second embodiment of the present invention. The difference from the first embodiment is that in FIG. 3, the data electrode group 1 of the rear substrate 12
4 is provided with the high dielectric constant layer 20 peculiar to the present invention.

First, in forming the front substrate 11, a thick film silver paste is patterned as a group of electrodes 19a and 19b on the glass substrate by screen printing and then baked to form the front substrate 11 and the groups of electrodes 19a and 19b. The dielectric glass 17 was formed by screen-printing a low-melting point lead glass paste and baking it, and a MgO thin film was formed on the dielectric glass 17 as a protective film 18 by an electron beam evaporation method.

Next, in forming the rear substrate 12,
A thick film silver paste was patterned as a data electrode group 14 on a glass substrate by screen printing and then baked to form a high dielectric constant layer 20 P on the data electrode group 14.
_{b (1-x) La x} Ti (1-x / 4) O 3 thin film (x = 0.05~0.
25) was formed into a film by the RF magnetron sputtering method.

After that, it is patterned into stripes by a chemical etching method, and an insulator glass paste is embedded as an insulator layer 13 by using a squeegee of a screen printer and then baked to form partition walls on the insulator layer 13. 1
5, a thick film paste is formed by patterning by screen printing and baking, and a phosphor 16 is formed by patterning by screen printing on the side surfaces of the partition walls 15 and the upper portions of the high dielectric constant layer 20 and the insulator layer 13 and then baking. did. Next, the front substrate 11 and the rear substrate 12 were sealed by using a glass frit and then evacuated, and a discharge gas of Ne-Xe mixed gas containing 5% of Xe was sealed at 500 Torr.

FIG. 4 shows the discharge cell pitch P of the conventional PDP and the data voltage difference ΔVd (=
The relationship of Vd single color-Vd white) is shown. When the pitch of the discharge cells is around 400 μm, no change is seen in the data voltage in the case of R, G, B single color display and in the case of white (R, G, B all color display). 100μ
In the vicinity of m, the data voltage in white display is 20V lower than the data voltage in R, G, B single color display.

From this, it is understood that the influence of the adjacent discharge cells increases as the discharge cell pitch P becomes smaller and the definition becomes higher. For this reason, when the pitch of the discharge cells becomes high-definition, the margin of the data voltage at the time of the addressing operation of driving the PDP becomes very narrow, and in actual image display, there is a lot of crosstalk due to erroneous discharge of adjacent discharge cells. However, the image quality is significantly impaired.

The discharge cell pitch P of the PDP having the structure according to the second embodiment and the data voltage difference Δ between the monochromatic display and the white display.
The relationship of Vd is shown in FIG. By providing a high dielectric constant layer of εr = 100 on the data electrode, the discharge cell pitch is 1
Even in the vicinity of 00 μm, ΔVd is reduced to 2 V or less.

Further, by providing the high dielectric constant layer having εr = 350, ΔVd is reduced to 0.7 V or less. At this time, the length w of the short side of the striped high dielectric constant layer
And the length W1 of the short side of the electrode 14 is 0.5 W1 ≦ w ≦ 1.
Similar results were obtained in the range of 5W1.

As is apparent from the above, the PDP according to the second embodiment is very excellent in that the voltage margin at the time of driving is widened and crosstalk due to erroneous discharge does not occur despite the high definition. It is possible to realize a PDP displaying.

(Third Embodiment) FIG. 6 is a block diagram of a PDP according to a third embodiment of the present invention. The difference from the first embodiment is that in FIG. 6, a high dielectric constant layer 20 peculiar to the present invention is provided on the electrode group 19a of the front substrate 11 to which the scanning pulse is applied.

First, in forming the front substrate 11,
A thick film silver paste was patterned as a group of electrodes 19a and 19b on a glass substrate by screen printing and then baked to form Pb _(1-x) La _x as a high dielectric constant layer 20 on the group of electrodes 19a of the front substrate 11. Ti _{(1-x / 4)} O ₃ thin film (x =
0.05 to 0.25) by RF magnetron sputtering method, and then patterned in stripes by chemical etching method to form front substrate 11 and electrode group 19b.
The low melting point lead glass paste is embedded as the dielectric glass 17 using a squeegee of a screen printer and then fired to form the high dielectric constant layer 20 and the dielectric glass 17.
A MgO thin film was formed thereon as the protective film 18 by an electron beam evaporation method.

Next, in forming the rear substrate 12,
A thick film silver paste is patterned as a data electrode group 14 on the glass substrate by screen printing and then baked to form an insulator glass paste as an insulator layer 13 on the front surface of the data electrode group 14 by a screen printing method. A partition 15 is formed on the insulator layer 13 by printing and then firing.
Is formed by patterning a thick film paste by screen printing and then firing, and by patterning a phosphor 16 on the side surfaces of the partition walls 15 and the upper portions of the high dielectric constant layer 20 and the insulator layer 13 by screen printing and then firing. .

Next, the front substrate 11 and the rear substrate 12 were sealed with glass frit and then evacuated, and a discharge gas of 50% Ne-Xe mixed gas containing 5% Xe was used.
It was enclosed at 0 Torr.

FIG. 1 shows a PDP having a configuration according to the third embodiment.
The amount of mobile charge ΔQ at the time of writing discharge by the address pulse when driving using the driving waveform of No. 1, the discharge delay time Td at the time of applying the first sustain pulse during the sustain period, and the relative permittivity εr of the high dielectric constant layer A comparison between the film thickness t and the conventional film thickness is shown in (Table 2).

[0047]

[Table 2]

To measure ΔQ, a reference capacitor Cs is connected in series between the electrode group 19b and the drive circuit, and the reference capacitor is used as the change amount ΔVcs of the potential difference Vcs across Cs before and after the application of the address pulse. It was calculated by multiplying by the capacity Cs of.

The discharge delay time Td is measured by observing the light emission of the discharge cell with a photodiode connected to an amplifier, and simultaneously observing the light emission peak waveform and the pulse voltage waveform applied to the discharge cell with an oscilloscope. I went by taking the average.

By providing a high dielectric constant layer of εr = 100 on the electrode of the front plate, ΔQ is increased by about 10% and T
d is reduced by about 20%. Further, by providing the high dielectric constant layer having εr = 350, ΔQ is increased by about 30% and Td is decreased by about 50%.

This is because the relative permittivity of the low melting point lead glass-based thick film dielectric layer is about εr = 11, while the relative permittivity of the high permittivity layer is εr = 100 to 350, which is a single digit. Since it is larger than the above, the wall charge amount increases and the effective potential of the discharge space on the electrode group 19a in the discharge cell at the time of the first sustain pulse application during the sustain period rises. However, since the same effect as when the voltage applied to the discharge cell is increased is obtained, the discharge delay time is reduced.

At this time, the short side length w of the striped high dielectric constant layer and the short side length W2 of the electrode 19a are 0.5W2.
Similar results were obtained in the range of ≤w≤1.5W2.

As is apparent from the above, the PDP according to the third embodiment increases the amount of wall charges during the write operation by using the high dielectric constant layer, and the wall charge amount during the sustain period is 1%.
By improving the discharge delay when the second sustain pulse is applied, it is possible to eliminate flicker and realize an excellent PDP with high image quality.

(Fourth Embodiment) FIG. 7 is a sectional view showing the structure of a PDP according to a fourth embodiment of the present invention. The difference from the first to third embodiments is that, in FIG. 7, on the electrode group 19a of the front substrate 11 on which the scanning pulse is applied and on the rear substrate 1.
A high dielectric constant layer 20 peculiar to the present invention is provided on both of the two data electrode groups 14, and a He-Ne-Xe-Ar quaternary mixed gas is used as a discharge gas, which is 760 to 4 higher than the conventional one.
That is, it was sealed at 000 Torr.

A PDP having the same structure as the conventional one (distance between electrodes d
= 40 μm), He (50%)-Ne (48
%)-Xe (2%), He (50%)-Ne (48%)
-Xe (2%)-Ar (0.1%), He (30%)-N
e (68%)-Xe (2%), He (30%)-Ne
PDPs using various composition gases of (67.9%)-Xe (2%)-Ar (0.1%) as discharge gas were prepared, and the relationship between the Pd product and the discharge starting voltage was calculated in each of the prepared PDPs. Examined.

FIG. 8 is a graph showing the result. Further, the table in FIG. 8 shows the PDP using each composition gas.
Brightness (discharge voltage 250 V) was shown.

Particularly, He (30%)-Ne (67.9)
%)-Xe (2%)-Ar (0.1%) gas, the brightness is relatively good and the Pd product = 6 (Torr.
cm) (distance between electrodes d = 60 μm, encapsulation pressure 1000 Torr), the discharge start voltage can be practically used in the range of discharge start voltage (220 V or less).
You can see that you can put in.

With this gas composition, the discharge starting voltage is P
The minimum value is shown in the vicinity of d product = 4. From this,
It can be seen that it is preferable to set Pd product near 4 (for example, when the filling pressure is 2000 Torr, the electrode distance d = 20 μm).

Although these absolute values (especially the discharge starting voltage) are changed by changing the Xe amount, the relative relationship is hardly changed.

However, in the case of actually displaying an image using the drive waveform of FIG. 11, discharge is performed between any one of the electrodes 19a and 19b on the front plate and the electrode 14 on the back plate during the writing operation. If the distance between the electrodes of the front plate and the electrodes of the back plate is shortened to about 20 μm, the discharge cell structure of the conventional PDP in which the phosphor layer is applied inside the barrier ribs of the back plate has a sufficient discharge space. However, there was a big problem that it could not be secured.

In the fourth embodiment, a PLt thin film having a relative dielectric constant εr = 350 is used as the high dielectric layer. The width of the high dielectric layer is the same as the width of each of the electrodes 19a on the front plate and the data electrodes 14 on the back plate.

[Table 3] When the height of the partition wall is 60 μm and the PDP of the conventional structure with the filling pressure of 2000 torr and the PDP of the fourth embodiment are actually displayed by using the drive waveforms of FIG. The evaluation results of luminance, efficiency, and image quality are shown below.

[0063]

[Table 3]

Although the height of the partition wall and the filling pressure are the same, in the PDP having the conventional structure, an address defect occurs, and the image quality is improved almost even if the initialization pulse and the write pulse voltage are increased. There wasn't. This is because the distance between the electrodes of the front plate and the back plate is large, so that the discharge start voltage increases and the wall charge amount is not sufficiently accumulated.

On the other hand, in the PDP of the fourth embodiment, no defective address was observed and good image display was possible. This is because the high dielectric layer is used for both the electrode group 19a of the front plate and the data electrode group 14 of the back plate used in the write operation, so that the wall charge amount at the time of the write discharge increases, and further It is considered that the electric field intensity distribution in the discharge space was concentrated by making the width of the dielectric layer the same as that of each electrode. Moreover, the efficiency is N with the conventional configuration.
e (95%)-Xe (5%) mixed gas at 500 torr
The efficiency was about 1.5 times higher than that when encapsulated.

As described above, the PDP of the fourth embodiment uses the high-dielectric layers for both the electrodes of the front plate and the back plate, so that the high image quality without address defects is achieved even under the condition that the filling pressure of the discharge gas is high. A highly efficient and excellent PDP can be realized.

Although the ABO ₃ type oxide high dielectric thin film is used as the high dielectric constant layer 20 in each of the above embodiments, the high dielectric constant layer 20 is not limited to this structure. It is needless to say that the same effect can be obtained by using a thick film high dielectric material mainly composed of a mixed fired product of an ABO ₃ type oxide high dielectric material and a glass frit.

In each of the above-mentioned embodiments, the high dielectric constant layer 20 has a high dielectric constant layer of εr = 100 and εr = 350, but the high dielectric constant layer is not limited to this structure. Needless to say, the same effect can be obtained by using a high dielectric constant layer having ε r = 100 to 1000 as the layer 20.

[0069]

As described above, according to the present invention, the front substrate having the pair of electrodes covered with the dielectric layer and the back substrate having the data electrodes having the insulating layer on the surface thereof are provided. A plasma display panel which is opposed to each other and is filled with a discharge gas between the front substrate and the rear substrate at a pressure of 760 to 4000 Torr to display an image by at least a writing discharge and a sustaining discharge. By providing a high dielectric constant layer on the electrode of, the discharge start voltage is reduced, the wall charge amount is increased, the drive voltage is reduced, the voltage margin at the time of drive is increased, and crosstalk due to erroneous discharge is suppressed. , Very high quality and highly efficient PD
The remarkable effect of realizing P is obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a plasma display panel according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a plot of a dielectric film thickness and a discharge start voltage Vf of a PDP having a conventional configuration.

FIG. 3 is a configuration diagram of a plasma display panel according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a relationship between a discharge cell pitch P of a conventional PDP and a data voltage difference ΔVd between a monochrome display and a white display.

FIG. 5 is a discharge cell pitch P of a PDP having the configuration according to the second embodiment and a data voltage difference ΔVd between a monochrome display and a white display.
Diagram showing the relationship between

FIG. 6 is a configuration diagram of a plasma display panel according to a third embodiment of the present invention.

FIG. 7 is a configuration diagram of a plasma display panel according to a fourth embodiment of the present invention.

FIG. 8 is a diagram showing a relationship between a Pd product and a discharge starting voltage in various discharge gas compositions.

FIG. 9 is a schematic view of a conventional plasma display panel.

FIG. 10 is an electrode matrix diagram of a conventional plasma display panel.

FIG. 11 is a timing chart of a driving method of a conventional plasma display panel.

[Explanation of symbols]

11 Front substrate 12 Back substrate 13 Insulator layer 14 Data electrode group 15 partitions 16 Phosphor 17 Dielectric glass layer 18 Protective film 19a electrode group 19b electrode group 20 High dielectric constant layer

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-6-243788 (JP, A) JP-A-10-302647 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01J 11/02

Claims (4)

(57) [Claims] 1. A plurality of opposed electrodes covered with a dielectric material are provided between a pair of parallel substrates, a discharge gas is sealed therein, and a relative permittivity εr is 100 or more and 200 or more on at least one of the electrodes.
A plasma display panel having a high dielectric constant layer having a value of 0 or less, wherein a filling pressure of the discharge gas is 7
A plasma display panel, which is 60 to 4000 Torr. 2. A plurality of counter electrodes covered with a dielectric material are provided between a pair of parallel substrates, a discharge gas is sealed therein, and a relative permittivity εr is 100 or more and 200 or more on the electrodes on at least one of the substrates.
A plasma display panel having a high dielectric constant layer having a value of 0 or less, the discharge gas, helium, neon, xenon, according to claim 1, characterized in that it is a mixture of noble gases, including argon Plasma display panel. As 3. A discharge gas, xenon 5 vol% or less, argon 0.5% by volume or less, or claim 1 helium, characterized in that it is contained less than 55 vol%
2. The plasma display panel according to 2 . 4. The high dielectric constant layer comprises Pb (1-x) LaxTi (1-x /
4) O3 (x = 0.05~0.25) plasma display panel according to any one of claims 1 to 3, characterized in that a thin film.