JP2001060074A - Driving method of plasma display panel and display device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving method of a plasma display panel which has high luminance and high luminous efficiency and is capable of performing stable discharge and a display device using the driving method. SOLUTION: This display device has a process making potential differences generated between first electrodes 1 and second electrodes 2 and between the first electrodes 1 and a third electrode 3 and a process making lights emitted by causing discharge currents to flow between the first electrodes 1 and the second electrodes 2, a process making counter electromotive forces (Vemf-mains) suppressing the fluctuation of the discharge currents generated at the first electrodes 1 and a process causing the discharge currents to flow between the third electrode 3 and the second electrodes 2 with respect to a plasma display panel having at least three kinds of electrodes, the first electrodes 1, the second electrodes 2 and the third electrode 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of driving a plasma display panel and a display device using the same, and in particular, at least three types of electrodes, a first electrode 1,
For the plasma display panel having the second electrode 2 and the third electrode 3, between the first electrode 1 and the second electrode 2, and between the first electrode 1 and the
A process of generating a potential difference between the three electrodes 3 or / and between the third electrode 3 and the second electrode 2, and a discharge current Im between the first electrode 1 and the second electrode 2;
ain the process of emitting light by flowing ain, and the back electromotive force Ve which suppresses the fluctuation of the discharge current on the first electrode 1 side and / or the second electrode 2 side.
The process of generating mf-main, between the third electrode 3 and the second electrode 2,
And / or a method for driving a plasma display panel including a process of flowing a discharge current Isub between the first electrode 1 and the third electrode 3.

[0002]

2. Description of the Related Art Plasma display panels (PDPs)
The technology of flat panel display technology is higher than that of liquid crystal panels because of its higher display speed, wider viewing angle, easier size, and higher display quality due to its self-luminous type. In recent years.
Generally, in PDP, ultraviolet rays are generated by gas discharge,
The phosphor is excited by the ultraviolet light to emit light, thereby performing color display. Then, a display cell partitioned by a partition is provided on the substrate, and a phosphor layer is formed on the display cell. In particular, the current mainstream of PDPs is a surface discharge type PDP having a three-electrode structure. FIG. 24 is an exploded perspective view of a structure of a conventional surface discharge type PDP having a three-electrode structure. FIG.
As shown in FIG. 4, one substrate has a pair of display electrodes adjacent to each other in parallel and has, on the other substrate, an address electrode 23 extending in a direction intersecting with the display electrodes, a partition 16 and a phosphor layer 17. Therefore, the phosphor layer can be made relatively thick, and it can be said that the phosphor layer is suitable for color display using the phosphor. The display electrode pair is composed of a scan electrode (scan electrode) 21 and a sustain electrode (sustain electrode) 22.

A conventional method of driving a panel divides one field period into a plurality of subfields having a weight of a light emitting period based on a binary system, and performs gradation display by a combination of subfields to emit light. It is. Each subfield includes an initialization period, an address period, and a sustain period. In order to display image data, different signal waveforms are applied to each electrode during the initialization period, the address period, and the sustain period. In the initialization period, an initialization pulse is applied to all scan electrodes 21. In the address period, by applying a write pulse between the address electrode 23 and the scan electrode 21, an address discharge is performed between the address electrode 23 and the scan electrode 21 to select a discharge cell. In the subsequent sustain period, a sustain discharge is applied between the scan electrode 21 and the sustain electrode 22 for a certain period to alternately invert the periodic sustain pulse, thereby causing a sustain discharge between the scan electrode 21 and the sustain electrode 22. And display.

[0004] However, the conventional plasma display apparatus still has problems in that the luminous efficiency is low and the luminance is low. For example, the luminous efficiency is 1 lm / W, which is about 1/5 of a CRT.

Until now, various studies have been made on the above-mentioned problems, but there is no example in which a PDP using a positive column for increasing the luminous efficiency of ultraviolet rays has been put to practical use. This is because the size of the PDP cell is limited with respect to the distance between the electrodes required for the positive column, and it is difficult to control the discharge by simply increasing the distance between the electrodes, which makes the discharge unstable and difficult. It is thought that it is possible.

[0006] Patents include, for example, JP-A-5-41165, JP-A-5-41164, and JP-A-6-275202. However, even if the above patent information is adopted, sufficient results can be obtained. Not been.

[0007]

As described above, the conventional plasma display device has a problem that the luminous efficiency is extremely low as compared with a display device such as a CRT. In general, a positive column can be generated by increasing the distance between the electrodes that cause a discharge. However, in a PDP cell configuration, simply increasing the distance between the electrodes does not stabilize the positive column, causing flickering discharge and increasing luminous efficiency. Not so big.

An object of the present invention is to solve the above-mentioned problems, that is, to provide a method of driving a plasma display panel which can utilize a positive column stably and realize high luminance and high luminous efficiency, and a display device using the same. To provide.

[0009]

A method of driving a plasma display panel according to the present invention comprises at least three kinds of electrodes,
For the plasma display panel having the electrode 1, the second electrode 2, and the third electrode 3, the first electrode 1 and the second electrode 2,
A process of generating a potential difference between the electrode 1 and the third electrode 3 or / and between the third electrode 3 and the second electrode 2; and a process of causing a discharge current Imain to flow between the first electrode 1 and the second electrode 2 to emit light. And the first electrode 1
Side, and / or on the second electrode 2 side, a process of generating a back electromotive force Vemf-main that suppresses fluctuations in the discharge current, between the third electrode 3 and the second electrode 2, or / and the first electrode 1 It has a process of flowing a discharge current Isub between the third electrodes 3.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention comprises at least a first electrode (1), a second electrode (2) and a third electrode (3).
The plasma display panel having
Between one electrode (1) and the second electrode (2), as well as the first electrode (1)
Generating a potential difference between the third electrode (3) and / or between the third electrode (3) and the second electrode (2); and
A process of causing a first discharge current (Imain) to flow between the electrode (1) and the second electrode (2) to emit light, and a step of: causing the first electrode (1) or / and the second electrode (2) to emit light. Generating a first back electromotive force (Vemf-main) that suppresses fluctuations in the first discharge current;
Between the third electrode (3) and the second electrode (2) or / and
A second discharge current (Isub) between one electrode (1) and the third electrode (3);
This is a method for driving a plasma display panel having a process of flowing the plasma display panel.

With such a driving method, the back electromotive force Vemf
With -main, the fluctuation of the discharge current Imain is suppressed, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. In addition, the back electromotive force
The decrease in the discharge current Imain (the decrease in wall charge) suppressed by Vemf-main can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage.

The invention according to claim 2 of the present invention is directed to a plasma display panel having at least a first electrode (1), a second electrode (2) and a third electrode (3). 1) and the second electrode (2), as well as the first electrode (1) and the third
Between the electrodes (3) and / or the third electrode (3) and the second electrode
(2) a step of generating a potential difference between the first electrode (1)
And / or generating, on the second electrode (2), a second back electromotive force (Vemf-C) that suppresses fluctuations in the charge / discharge current of the panel flowing when the potential difference is generated; and Electrode (1)
Flowing a first discharge current (Imain) between the first electrode (2) and the second electrode (2) to emit light; and providing the first electrode (1) side and / or the second electrode (2) side with the second discharge current (Imain). A step of generating a first back electromotive force (Vemf-main) for suppressing fluctuations in the discharge current of the first and second electrodes and / or between the third electrode (3) and the second electrode (2) or / and the first electrode A method for driving a plasma display panel, comprising a step of flowing a second discharge current (Isub) between (1) and the third electrode (3).

According to such a driving method, immediately before the discharge, a decrease in the charge / discharge current of the panel can be suppressed by the back electromotive force Vemf-C, and the voltage applied to the discharge space can be substantially increased. Further, the fluctuation of the discharge current Imain can be suppressed by the back electromotive force Vemf-main, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. Moreover,
The positive column discharge thus formed is very efficient,
Strong emission intensity can be obtained. Also, the discharge current Isub
Flow, the decrease in the discharge current Imain (the decrease in the wall charge) suppressed by the back electromotive force Vemf-main can be compensated, and the positive column discharge in the next cycle can be generated at a low voltage. Becomes

[0014] The invention described in claim 3 of the present invention is directed to a plasma display panel having at least a first electrode (1), a second electrode (2) and a third electrode (3). 1) and the second electrode (2), as well as the first electrode (1) and the third
Between the electrodes (3) and / or the third electrode (3) and the second electrode
(2) a step of generating a potential difference between the first electrode (1)
Flowing a first discharge current (Imain) between the first electrode (1) and the second electrode (2) to emit light;
Generating a first back electromotive force (Vemf-main) on the two electrode (2) side for suppressing the variation of the first discharge current;
Between the electrode (3) and the second electrode (2) and / or the first electrode
(1) flowing a second discharge current (Isub) between the third electrode (3) and a third back electromotive force (Vemf) that suppresses fluctuation of the discharge current on the third electrode (3) side. -sub) is a method of driving a plasma display panel having a process of generating (-sub).

With such a driving method, the back electromotive force Vemf
With -main, the fluctuation of the discharge current Imain is suppressed, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. In addition, the back electromotive force
The decrease in the discharge current Imain (the decrease in wall charge) suppressed by Vemf-main can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage. Further, the discharge current Isub flowing through the third electrode 3 can be suppressed to a necessary minimum by the back electromotive force Vemf-sub. Thus, for example, in a panel in which a phosphor layer or the like is formed on the third electrode 3, deterioration of the phosphor layer can be suppressed.

The invention according to claim 4 of the present invention is directed to a plasma display panel having at least a first electrode (1), a second electrode (2) and a third electrode (3). 1) and the second electrode (2), as well as the first electrode (1) and the third
Between the electrodes (3) and / or the third electrode (3) and the second electrode
(2) a step of generating a potential difference between the first electrode (1)
And / or generating, on the second electrode (2), a second back electromotive force (Vemf-C) that suppresses fluctuations in the charge / discharge current of the panel flowing when the potential difference is generated; and Electrode (1)
Flowing a first discharge current (Imain) between the first electrode (2) and the second electrode (2) to emit light; and providing the first electrode (1) side and / or the second electrode (2) side with the second discharge current (Imain). A step of generating a first back electromotive force (Vemf-main) for suppressing fluctuations in the discharge current of the first and second electrodes and / or between the third electrode (3) and the second electrode (2) or / and the first electrode (1) flowing a second discharge current (Isub) between the third electrode (3) and a third back electromotive force (Vemf) that suppresses fluctuation of the discharge current on the third electrode (3) side. -sub) is a method of driving a plasma display panel having a process of generating (-sub).

By such a driving method, it is possible to suppress a decrease in the charge / discharge current of the panel with the back electromotive force Vemf-C immediately before the discharge, and to substantially increase the voltage applied to the discharge space. Further, the fluctuation of the discharge current Imain can be suppressed by the back electromotive force Vemf-main, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. Moreover,
The positive column discharge thus formed is very efficient,
Strong emission intensity can be obtained. Also, the discharge current Isub
Flow, the decrease in the discharge current Imain (the decrease in the wall charge) suppressed by the back electromotive force Vemf-main can be compensated, and the positive column discharge in the next cycle can be generated at a low voltage. Becomes Furthermore, the back electromotive force Vemf-sub
The discharge current Isub flowing through the electrode 3 can be suppressed to a necessary minimum. Thus, for example, in a panel in which a phosphor layer or the like is formed on the third electrode 3, deterioration of the phosphor layer can be suppressed.

According to a fifth aspect of the present invention, the peak value of the first discharge current (Imain) is equal to the first back electromotive force (Vemf-m
2. The method according to claim 1, wherein the reduction is at least 10% by ain).
5. A method for driving a plasma display panel according to any one of items 4 to 4.

With such a driving method, the back electromotive force Vemf
With -main, the fluctuation of the discharge current Imain is suppressed, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. However, the discharge current Imain due to the back electromotive force Vemf-main
If the decrease in the peak value is less than 10%, the effect of the present invention is not so large. Further, by flowing the discharge current Isub, the discharge current Imain suppressed by the back electromotive force Vemf-main
Can be compensated for (a decrease in wall charge), and the positive column discharge in the next cycle can be generated at a low voltage.

According to a sixth aspect of the present invention, the current value of the second discharge current (Isub) is equal to the current value of the first discharge current (Imain) and the current value of the second discharge current (Isub). 10 of the sum with the current value
%. The method for driving a plasma display panel according to any one of claims 1 to 5, wherein

With such a driving method, the back electromotive force Vemf
With -main, the fluctuation of the discharge current Imain is suppressed, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. In addition, the back electromotive force
The decrease in the discharge current Imain (the decrease in wall charge) suppressed by Vemf-main can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage. However, if the discharge current Isub is less than 10% of the discharge current Imain, the effect of the present invention is not so large.

According to a seventh aspect of the present invention, the potentials of the first electrode (1) and the second electrode (2) are simultaneously changed with respect to the third electrode (3). Item 7. A method for driving a plasma display panel according to any one of Items 1 to 6.

With such a driving method, the back electromotive force Vemf
With -main, the fluctuation of the discharge current Imain is suppressed, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. In addition, the back electromotive force
The decrease in the discharge current Imain (the decrease in wall charge) suppressed by Vemf-main can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage. However, if the discharge current Isub is less than 10% of the discharge current Imain, the effect of the present invention is not so large.

According to an eighth aspect of the present invention, in the process of generating a potential difference between the first electrode (1) and the second electrode (2), the rate of change of the potential is 1.0 V / ns or more. A method for driving a plasma display panel according to any one of claims 1 to 7, wherein:

With such a driving method, the back electromotive force Vemf
With -main, the fluctuation of the discharge current Imain is suppressed, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. In addition, the back electromotive force
The decrease in the discharge current Imain (the decrease in wall charge) suppressed by Vemf-main can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage. Furthermore, the first
In the process of generating a potential difference between the electrode 1 and the second electrode 2, by changing the rate of change of the potential to 1.0 V / ns or more,
The maintenance voltage can be reduced, and the luminous efficiency can be greatly increased.

According to a ninth aspect of the present invention, the first back electromotive force (Vemf-main) is changed according to the display amount of the plasma display panel.
9. A driving method for a plasma display panel according to any one of items 1 to 8.

With such a driving method, the back electromotive force Vemf
With -main, the fluctuation of the discharge current Imain is suppressed, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. In addition, the back electromotive force
The decrease in the discharge current Imain (the decrease in wall charge) suppressed by Vemf-main can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage. Further, by changing the back electromotive force Vemf-main according to the display amount, the luminous efficiency can be optimized according to the display amount.

According to a tenth aspect of the present invention, there is provided a plasma display apparatus for driving a plasma display panel by the method for driving a plasma display panel according to any one of the first to ninth aspects.

According to such a display device, the fluctuation of the discharge current Imain can be suppressed by the back electromotive force Vemf-main, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. Also, by flowing the discharge current Isub,
The decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage. Further, by changing the back electromotive force Vemf-main according to the display amount, the luminous efficiency can be optimized according to the display amount.

[0030] The invention according to claim 11 of the present invention provides the following.
11. The plasma display device according to claim 10, wherein a distance between the electrode (1) and the second electrode (2) is 0.2 mm or more.

With such a display device, a positive column can be clearly generated. In addition, the fluctuation of the discharge current Imain is suppressed by the back electromotive force Vemf-main, so that the positive column discharge can be formed stably and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. In addition, by flowing the discharge current Isub, the decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main can be compensated, and the positive column discharge in the next cycle can be performed at a low voltage. Can be generated.

The twelfth aspect of the present invention is directed to the first aspect.
An electrode (1) and a second electrode (2) are formed on a first substrate (11),
The distance between one substrate (11) and the opposing second substrate (12) is 0.15 mm
The plasma display device according to claim 10 or 11, wherein:

With such a display device, a sufficient discharge space can be obtained, and a positive column can be generated strongly and stably. Also, the back EMF Vemf
With -main, the fluctuation of the discharge current Imain is suppressed, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. In addition, the back electromotive force
The decrease in the discharge current Imain (the decrease in wall charge) suppressed by Vemf-main can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage.

According to a thirteenth aspect of the present invention, a plurality of third electrodes (3) are formed in one display cell which is a minimum display unit of the plasma display panel. Item 13. The plasma display device according to any one of Items 10 to 12.

According to such a display device, the positive column is spread on a plurality of third electrodes (a plurality of the positive columns are formed in some cases), and the luminous intensity and the luminous efficiency can be increased. In addition, the fluctuation of the discharge current Imain is suppressed by the back electromotive force Vemf-main, so that the positive column discharge can be formed stably and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. In addition, by flowing the discharge current Isub, the decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main can be compensated, and the positive column discharge in the next cycle can be performed at a low voltage. Can be generated.

According to a fourteenth aspect of the present invention, a projection is provided between a plurality of third electrodes (3) formed in one display cell which is a minimum display unit of a plasma display panel.
14. The plasma display device according to claim 10, wherein (18) is formed.

With such a display device, a plurality of positive columns are formed on the plurality of third electrodes, and the luminous intensity and luminous efficiency can be further improved. In addition, the fluctuation of the discharge current Imain is suppressed by the back electromotive force Vemf-main, so that the positive column discharge can be formed stably and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. In addition, by flowing the discharge current Isub, the decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main can be compensated, and the positive column discharge in the next cycle can be performed at a low voltage. Can be generated.

The invention according to claim 15 of the present invention provides the following:
An electrode (1) and a second electrode (2) are formed on a first substrate (11), and a third electrode (3) is provided on the first electrode (1) and the second electrode via a dielectric.
The plasma display device according to any one of claims 10 to 14, wherein the first substrate (11) is formed so as to intersect with (2).

With such a display device, the fluctuation of the discharge current Imain can be suppressed by the back electromotive force Vemf-main, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. Also, by flowing the discharge current Isub,
The decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage.

Further, the first electrode 1 and the second electrode 2 are formed on the first substrate 11, and the first electrode 1 and the second electrode 2 intersect the first electrode 2 and the second electrode 2 via a dielectric. By being formed on the substrate 11, a material having a high secondary electron emission coefficient can be used as a protective film on all three types of electrodes. This makes it possible to lower the discharge starting voltage,
There is no restriction on using the third electrode as a cathode.

According to a sixteenth aspect of the present invention, the first aspect
An electrode (1) and a second electrode (2) are formed on a first substrate (11), and a third electrode (3) intersects the first electrode (1) and the second electrode (2). The plasma display device according to any one of claims 10 to 14, wherein the plasma display device is formed on a second substrate (12) facing the first substrate (11).

With such a display device, the fluctuation of the discharge current Imain can be suppressed by the back electromotive force Vemf-main, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. Also, by flowing the discharge current Isub,
The decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage.

Also, the first electrode 1 and the second electrode 2 are formed on the first substrate 11, and the third electrode 3 faces the first substrate 11 so that the third electrode 3 intersects the first electrode 1 and the second electrode 2. By being formed on the second substrate 12, light emission due to facing discharge in addition to surface discharge can be obtained, and higher light emission intensity can be obtained.

According to a seventeenth aspect of the present invention,
An electrode (1) and a second electrode (2) are formed on a first substrate (11), and a float electrode (4) is formed between adjacent display cells on the first substrate (11). Claims 10 to 16
A plasma display device according to any one of the above.

According to such a display device, the fluctuation of the discharge current Imain can be suppressed by the back electromotive force Vemf-main, and the positive column discharge can be stably formed, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. Also, by flowing the discharge current Isub,
The decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage.

Further, the first electrode 1 and the second electrode 2 are formed on the first substrate 11, and the float electrode 4 is formed between adjacent display cells (minimum display units) on the first substrate 11. , Crosstalk can be suppressed.

Hereinafter, the present invention will be described in detail with reference to embodiments, but embodiments of the present invention are not limited thereto.

The invention according to claim 18 of the present invention is characterized in that
A substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of the first substrate. A driving method for a plasma display panel in which address electrodes are arranged perpendicularly to the scan electrodes on the inner surface of the second substrate, wherein a waveform of a sustain pulse applied to the scan electrodes or / and the sustain electrodes is A method for driving a plasma display panel, comprising providing a protrusion and / or a depression.

By such a driving method, the amount of surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

The invention according to claim 19 of the present invention is characterized in that
A substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of the first substrate. A driving method for a plasma display panel in which address electrodes are arranged perpendicularly to the scan electrodes on an inner surface of the second substrate, wherein a waveform of a potential difference between the scan electrodes and the sustain electrodes has a protrusion. And / or providing a depression.

According to such a driving method, the surface discharge current amount decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

The twentieth aspect of the present invention is directed to the first aspect.
A substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of the first substrate. A driving method for a plasma display panel in which address electrodes are arranged perpendicularly to the scan electrodes on an inner surface of the second substrate, wherein a waveform of a sustain pulse applied to the scan electrodes and / or the sustain electrodes is A method for driving a plasma display panel, characterized in that a voltage sufficient for starting discharge is applied, a voltage is reduced with an increase in discharge current after discharge is started, and a voltage is not maintained again after discharge is completed. It is.

By such a driving method, the surface discharge current amount decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

According to the twenty-first aspect of the present invention, the first aspect
A substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of the first substrate. A driving method for a plasma display panel in which address electrodes are arranged perpendicularly to the scan electrodes on an inner surface of the second substrate, wherein a waveform of a potential difference between the scan electrodes and the sustain electrodes is such that discharge starts. A method for driving a plasma display panel, characterized in that the voltage is reduced with an increase in discharge current after the start of discharge, and is maintained at a voltage at which discharge does not start again after discharge. .

By such a driving method, the amount of surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

The invention according to claim 22 of the present invention provides the following:
A substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of the first substrate. A driving method for a plasma display panel in which address electrodes are arranged perpendicularly to the scan electrodes on an inner surface of the second substrate, wherein a waveform of a sustain pulse applied to the scan electrodes and / or the sustain electrodes is A method for driving a plasma display panel, characterized in that the plasma display panel has an overshoot shape.

By such a driving method, the surface discharge current amount decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

According to the twenty-third aspect of the present invention, the first aspect
A substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of the first substrate. A driving method for a plasma display panel in which address electrodes are arranged perpendicularly to the scan electrodes on an inner surface of the second substrate, wherein a waveform of a potential difference between the scan electrodes and the sustain electrodes has an overshoot. A method for driving a plasma display panel, characterized by having a shape of

By such a driving method, the amount of surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

According to a twenty-fourth aspect of the present invention, a projection and / or a depression is provided in a waveform of a sustain pulse applied to a scan electrode and / or a sustain electrode, so that a gap between the scan electrode and the sustain electrode is provided. 19. The method according to claim 18, wherein the peak value of the discharge current flowing through the PDP is reduced by 10% or more.

By such a driving method, the amount of surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

According to a twenty-fifth aspect of the present invention, the projection and / or the depression are provided in the waveform of the potential difference between the scan electrode and the sustain electrode so that the potential difference between the scan electrode and the sustain electrode is reduced. 20. The peak value of the discharge current flowing through the battery decreases by 10% or more.
It is a driving method of the plasma display panel described.

By such a driving method, the surface discharge current amount decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

According to a twenty-sixth aspect of the present invention, the sustain pulse applied to the scan electrode and / or the sustain electrode has a waveform in which the voltage drops as the discharge current increases after the start of the discharge. 21. The method according to claim 20, wherein the peak value of the discharge current flowing between the electrode and the sustain electrode is reduced by 10% or more.

By such a driving method, the amount of surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

In the invention according to claim 27 of the present invention, since the waveform of the potential difference between the scan electrode and the sustain electrode is a waveform in which the voltage drops as the discharge current increases after the start of discharge, 22. The method according to claim 21, wherein a peak value of a discharge current flowing between the sustain electrode and the sustain electrode is reduced by 10% or more.

By such a driving method, the amount of surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

According to a twenty-eighth aspect of the present invention, since the waveform of the sustain pulse applied to the scan electrode and / or the sustain electrode has an overshoot shape, the sustain pulse flows between the scan electrode and the sustain electrode. 23. The method according to claim 22, wherein the peak value of the discharge current decreases by 10% or more.

By such a driving method, the amount of surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

According to a twenty-ninth aspect of the present invention, since the waveform of the potential difference between the scan electrode and the sustain electrode has an overshoot shape, a discharge flowing between the scan electrode and the sustain electrode is achieved. 24. The method according to claim 23, wherein the peak value of the current decreases by 10% or more.

By such a driving method, the amount of surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

The invention according to claim 30 of the present invention is characterized in that
A substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of the first substrate. For a plasma display panel in which address electrodes are arranged perpendicularly to the scan electrodes on the inner surface of the second substrate, a surface discharge that is a discharge between a sustain electrode and a scan electrode, and a sustain electrode or a scan electrode. A method for driving a plasma display panel, characterized by simultaneously generating a counter discharge, which is a discharge between an address electrode and an address electrode.

With such a driving method, a positive column discharge can be formed stably, and flickering of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity.

According to a thirty-first aspect of the present invention, the discharge current value of the opposed discharge is at least 10% of the sum of the discharge current value of the surface discharge and the discharge current value of the opposed discharge. Item 31 is a method for driving a plasma display panel according to Item 30.

With such a driving method, the positive column discharge can be formed stably, and the flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity.

The invention according to claim 32 of the present invention is a plasma display device using the method for driving a plasma display panel according to any one of claims 18 to 31.

With such a plasma display device, a positive column discharge can be stably formed, and flickering of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity.

The invention according to claim 33 of the present invention provides the following:
A substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of the first substrate. An inductance is connected in series to the scan electrode and / or the sustain electrode for a plasma display panel in which address electrodes are arranged perpendicularly to the scan electrode on the inner surface of the second substrate. Is a plasma display device.

With such a plasma display device, a positive column discharge can be stably formed, and flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity.

According to a thirty-fourth aspect of the present invention, the peak value of the discharge current flowing between the scan electrode and the sustain electrode is obtained by connecting an inductance in series with the scan electrode and / or the sustain electrode. 34. The plasma display device according to claim 33, wherein is reduced by 10% or more.

With such a plasma display device, a positive column discharge can be formed stably, and flickering of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity.

The invention according to claim 35 of the present invention is the method for driving a plasma display panel according to any one of claims 18 to 31, wherein the address electrode is connected to a predetermined potential.

According to such a driving method, the amount of surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

The invention according to claim 36 of the present invention is the plasma display device according to any one of claims 32 to 34, wherein the address electrode is connected to a predetermined potential.

With such a plasma display device, the surface discharge current amount decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

According to a thirty-seventh aspect of the present invention, the period in which the potential of the sustain electrode and the potential of the scan electrode are the same is less than 500 ns. It is a driving method of the plasma display panel described.

By such a driving method, the surface discharge current amount decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

According to a thirty-eighth aspect of the present invention, the period in which the potential of the sustain electrode and the potential of the scan electrode are the same is less than 500 ns. It is a plasma display device of the description.

With such a plasma display device, the amount of surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

According to a thirty-ninth aspect of the present invention, the absolute value of the displacement speed of the voltage applied to the discharge space is 1.0 V / ns.
38. The driving method of a plasma display panel according to any one of claims 18 to 31, 35 or 37, wherein:

By such a driving method, the amount of surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

According to the present invention, the absolute value of the displacement rate of the voltage applied to the discharge space is 1.0 V / ns.
A plasma display device according to any one of claims 32 to 34, 36 or 38, characterized by the above.

With such a plasma display device, the surface discharge current decreases, the voltage drop of the positive column increases, and the luminance increases. Further, since the brightness due to the opposed discharge also increases, the light emitting efficiency is improved.

The invention according to claim 41 of the present invention is characterized in that
The plasma display device according to any one of claims 32 to 34, 36, 38 or 40, wherein a distance between the substrate and the second substrate is 0.15 mm or more.

With such a plasma display device, a positive column discharge can be formed stably, and flickering of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity.

The invention according to claim 42 of the present invention is characterized in that a plurality of address electrodes are formed in one display cell which is a minimum display unit of a plasma display panel. Any of, 36,
38. A plasma display device according to 38, 40 or 41.

With such a plasma display device, a positive column discharge can be formed stably, and flickering of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity.

According to the invention described in claim 43 of the present invention, the projection is formed between a plurality of address electrodes formed in one display cell which is the minimum display unit of the plasma display panel. 43. The plasma display device according to claim 42, wherein:

With such a plasma display device, a positive column discharge can be stably formed, and flicker of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity.

The invention according to claim 44 of the present invention is characterized in that
The plasma display device according to any one of claims 32 to 34, 36, 38 or 40 to 43, wherein a float electrode is formed between adjacent display cells on the substrate.

With such a plasma display device, a positive column discharge can be formed stably, and flickering of the discharge can be suppressed. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity.

(Embodiment 1) Embodiments of the present invention will be described below with reference to the drawings.

The driving method of the plasma display panel described in this embodiment and the display device using the same have at least three types of electrodes, the first electrode 1 and the second electrode.
2, for a plasma display panel having a third electrode 3, between the first electrode 1 and the second electrode 2, and between the first electrode 1 and the third electrode 3.
A step of causing a potential difference between the first and second electrodes 2 and / or a step of causing a discharge current Imain to flow between the first electrode 1 and the second electrode 2 to emit light; And / or second
On the electrode 2 side, a back electromotive force Vemf-ma that suppresses fluctuations in the discharge current
generating in, between the third electrode 3 and the second electrode 2, or /
And a process of flowing a discharge current Isub between the first electrode 1 and the third electrode 3.

Further, a process of generating a back electromotive force Vemf-C on the first electrode 1 side and / or the second electrode 2 side, which suppresses fluctuation of the charge / discharge current of the panel flowing when the potential difference is generated. Have

The peak value of the discharge current Imain is
It is characterized in that it is reduced by 10% or more by the back electromotive force Vemf-main.

The discharge current Isub between the third electrode 3 and the second electrode 2 or / and between the first electrode 1 and the third electrode 3 is the first electrode 1
Characterized in that 10% or more of the discharge current Imain flows between the first electrode 2 and the second electrode 2.

Further, the potential of the first electrode 1 and the potential of the second electrode 2 are changed simultaneously with respect to the third electrode 3.

In the process of generating a potential difference between the first electrode 1 and the second electrode 2, the potential change speed is 1.0 V
/ ns or more.

Further, the invention is characterized in that the back electromotive force Vemf-main is changed according to the display amount.

Hereinafter, the present embodiment will be described with reference to specific examples, but embodiments of the present invention are not limited thereto.

[Panel Structure] FIG. 1 is an exploded perspective view of a plasma display panel (PDP) used in the first embodiment. The PDP shown in FIG. 1 includes a first electrode substantially parallel to an inner surface of a first substrate 11 which is one of a pair of substrates sandwiching a discharge space.
1, having a second electrode 2 and a dielectric layer 13, on the inner surface of the other second substrate 12, a third electrode 3 intersecting the first electrode 1 and the second electrode 2, a dielectric layer 15, Partition walls that divide the space into unit light emitting areas EU
16 and a phosphor 17 that emits light by discharge. The distance between the first electrode 1 and the second electrode 2 is 0.2 mm or more.

The material of the substrate is generally soda lime glass, but is not particularly limited. As a material of the partition wall, it is common to use a low melting point glass, but it is not particularly limited. The phosphor is not particularly limited as long as it is excited by ultraviolet rays generated by the discharge and emits light. As the material of the dielectric, low melting glass is generally used, but is not particularly limited. The protective film is preferably made of a material having a high secondary electron emission coefficient γ, and is generally MgO, but is not particularly limited. The discharge gas is generally a mixed gas of at least one of He, Ne, and Ar and Xe, but is not particularly limited.

[Driving Method] FIG. 2 shows that the first electrode 1 and the
3 shows a voltage waveform output from a circuit to a second electrode 2 and a third electrode 3. In FIG. 2, the horizontal axis represents time, and the vertical axis represents voltage. FIG. 2A shows a voltage waveform of the first electrode 1, and FIG.
Shows the voltage waveform of the second electrode 2 and 2 (c) shows the voltage waveform of the third electrode 3. FIG. 2 shows only a period in which the voltage of the second electrode 2 changes from Hi to Lo, and the voltage of the first electrode 1 changes from Lo to Hi. In the sustain period, the voltage of the second electrode 2 changes from Hi to Lo, the voltage of the first electrode 1 changes from Lo to Hi,
The voltage of the first electrode 1 changes from Hi to Lo, and the voltage of the second electrode 2 changes from Lo
Light is emitted continuously by repeating the period of changing to Hi.

By applying these voltages, the first
A potential difference is generated between the electrode 1 and the second electrode 2 and between the first electrode 1 and the third electrode 3, and the panel is charged by setting the first electrode 1 to be positive and the second electrode 2 and the third electrode 3 to be negative. are doing. At this time, with respect to the third electrode 3, the potentials of the first electrode 1 and the second electrode 2 were simultaneously changed.
Further, a voltage was applied so that the change speed of the potential was 1.0 V / ns or more. Furthermore, in order to generate a back electromotive force Vemf-C that suppresses fluctuations in the charging current of the panel,
An inductance of 100 μH was inserted. Therefore, when actually observing the voltage and current waveforms of the first electrode 1, the second electrode 2, and the third electrode 3, the results are as shown in FIG. In FIG. 3, the horizontal axis represents time, and the vertical axis represents voltage and current. 3 (a) shows the voltage and current waveforms of the first electrode 1, FIG. 3 (b) shows the voltage and current waveforms of the second electrode 2, and FIG. 3 (c) shows the voltage and current of the third electrode 3. The waveform is shown. This makes it possible to increase the electric field intensity applied between the first electrode 1 and the second electrode 2 immediately before the start of discharge.

Next, when the discharge starts, a discharge current Imain flows between the first electrode 1 and the second electrode 2 to emit light. At this time, the 100 μH inductance inserted on the first electrode 1 side of the circuit is used as it is in order to generate the back electromotive force Vemf-main for suppressing the fluctuation of the discharge current. As a result, the discharge current Imain
Is small and a gentle current waveform is obtained. At this time, when observing the positive column, it can be seen that it is strongly thick and very stable. Further, at the same time when the discharge starts, a discharge current Isub flows between the third electrode 3 and the second electrode 2 to which no voltage is applied. In this way, by flowing the discharge current Isub, the discharge current Isub suppressed by the back electromotive force Vemf-main
The decrease in main (the decrease in wall charge) can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage. If the back electromotive force Vemf-C is not generated, an inductance may be inserted immediately before the discharge.

By driving in this manner, the first
The distance between the electrode 1 and the second electrode 2 is 0.5 mm, the first substrate 11,
With a panel in which the distance between the opposing second substrates 12 was 0.12 mm, a sustain voltage of 245 V and a luminous efficiency of 2.54 lm / W were obtained.

Next, the back electromotive force Vemf due to the inductance
First electrode 1 and second electrode when -main is not generated
2, the voltage and current waveforms of the third electrode 3 are shown in FIG. In FIG. 4, the horizontal axis represents time, and the vertical axis represents voltage and current.
FIG. 4A shows the voltage and current waveforms of the first electrode 1, and FIG.
Shows the voltage and current waveforms of the second electrode 2, and FIG. 4C shows the voltage and current waveforms of the third electrode 3. The discharge current Imain is reduced by 10% or more due to the back electromotive force Vemf-main of the inductance.

In this case, a panel in which the distance between the first electrode 1 and the second electrode 2 is 0.5 mm, the distance between the first substrate 11 and the opposing second substrate 12 is 0.12 mm, the sustain voltage is 300 V, and the light emission is Efficiency 1.28lm / W
Met.

Next, the phenomenon when the magnitude of the inductance is changed or the driving voltage is increased will be described.

At this time, a back electromotive force Vemf-main is similarly generated by using the inductance,
10% or less. Also, the back EMF Vemf
-main allows the discharge current Imain to be reduced by less than 10%. With such driving, the positive column discharge is not stabilized, and the luminous efficiency does not increase so much.

Next, a description will be given of a phenomenon in the case where the rate of change of the potential is changed in the process of generating a potential difference between the first electrode 1 and the second electrode 2. 0.5V / ns potential change rate
As a result, it was found that the luminous efficiency was greatly changed depending on the change speed of the potential. In particular,
The luminous efficiency becomes extremely large at 1.0 V / ns or more.For example, in the above panel, when the potential change rate is 0.5 V / ns, the luminous efficiency is about 1.2 lm / W, whereas the potential change rate is about 1.2 lm / W. 1.8V /
At ns, the luminous efficiency is 2.54 lm / W.

In this case, the inductance of our panel is 100 μH, but the optimum size is determined by the capacity of the panel. That is, when the discharge current Imain is 10
The inductance that generates the back electromotive force Vemf-main that decreases by more than% may be selected according to the capacity of the panel.
Further, if the magnitude of the inductance is optimized, the luminous efficiency is further increased by using the inductance on both the first electrode 1 side and the second electrode 2 side.

In the above example, the means for generating the back electromotive force Vemf-main and Vemf-C is an inductance. However, the means is not particularly limited as long as it can generate the back electromotive force. For example, as means for generating the back electromotive force Vemf-main, a back electromotive force or a reverse pulse that cancels out the potential difference between the first electrode 1 and the second electrode 2 can be applied. Furthermore, it is also possible to make the waveform of the discharge current Imain gentle by continuously superimposing pulses. Similarly, a pulse can be intentionally superimposed as a means for generating the back electromotive force Vemf-C. FIG. 5 shows a waveform of an applied voltage when the back electromotive force is generated by a pulse. In FIG. 5, the horizontal axis represents time, and the vertical axis represents voltage. 5A shows the voltage waveform of the first electrode 1, FIG. 5B shows the voltage waveform of the second electrode 2, and FIG. 5C shows the voltage waveform of the third electrode 3.

In order to force the discharge current Isub to flow, it is possible to apply a pulse to the third electrode 3 simultaneously with the start of the discharge. Further, in order to make the discharge current Isub easier to flow, a potential difference can be provided between the third electrode 3 and the second electrode when the panel is charged. FIG. 6 shows the waveform of the applied voltage when a pulse is applied to the third electrode 3 and the discharge current Isub is forced to flow. In FIG. 6, the horizontal axis represents time, and the vertical axis represents voltage. FIG. 6 shows the waveform of the applied voltage when the back electromotive force is generated by a pulse. FIG. 6A shows the first electrode 1.
6 (b) shows the voltage waveform of the second electrode 2, and FIG. 6 (c) shows the voltage waveform of the third electrode 3.

The process of providing a potential difference between the electrodes does not necessarily have to be performed by charging the panel. For example, discharge of the panel (not gas discharge) may be used.

Strictly speaking, the effect of the present invention in this embodiment slightly changes due to a change in capacitance due to the lighting rate of the panel. However, the back electromotive force Vemf-mai
By controlling n, the luminous efficiency can be optimized according to the display amount.

[Display Apparatus] The scan electrode, sustain electrode and address electrode shown below are, for example, the above-mentioned first electrode 1, second electrode 2 and third electrode 3.

FIG. 7 is a block diagram showing a configuration of the display device according to the present embodiment. 7 includes a PDP 100, an address driver 110, a scan driver 120, a sustain driver 130, a discharge control timing generation circuit 140, an A / D converter (analog-to-digital converter) 151, a scan number converter 152, and a subfield. It includes a conversion unit 153.

The PDP 100 includes a plurality of address electrodes, a plurality of scan electrodes (scan electrodes), and a plurality of sustain electrodes (sustain electrodes). The plurality of address electrodes are arranged in the vertical direction of the screen, and the plurality of scan electrodes and the plurality of scan electrodes are arranged. The sustain electrodes are arranged in the horizontal direction of the screen. The plurality of sustain electrodes are commonly connected. A discharge cell is formed at each intersection of the address electrode, the scan electrode, and the sustain electrode, and each discharge cell forms a pixel on a screen. By applying a write pulse to the PDP 100 between the address electrode and the scan electrode, an address discharge is performed between the address electrode and the scan electrode and a discharge cell is selected, and then, between the scan electrode and the sustain electrode. By applying a periodic sustain pulse that is alternately inverted, sustain discharge is performed between the scan electrode and the sustain electrode to perform display.

As a gradation display driving method in an AC type PDP, for example, ADS (Address and Display-period S
eparated: address / display period separation) method can be used. FIG. 8 is a diagram for explaining the ADS method.
The vertical axis in FIG. 8 indicates the scanning direction (vertical scanning direction) of the scan electrodes from the first line to the m-th line, and the horizontal axis indicates time. In the ADS system, one field (1/60 second = 16.67m)
s) is temporally divided into subfields. For example, when displaying 256 gradations with 8 bits, one field is divided into eight subfields. Each subfield is divided into an address period in which an address discharge for selecting a lighting cell is performed and a sustain period in which a sustain discharge for display is performed. In the ADS method, scanning by address discharge is performed on the entire surface of the PDP from the first line to the m-th line in each subfield, and sustain discharge is performed when the entire address discharge is completed.

First, the video signal VD is input to the A / D converter. Further, the horizontal synchronization signal H and the vertical synchronization signal V
Is supplied to a discharge control timing generation circuit, an A / D converter, a scan number converter, and a subfield converter. A /
The D converter converts the video signal VD into a digital signal,
The image data is provided to the scan number conversion unit. The scanning number conversion unit converts the image data into image data of the number of lines corresponding to the number of pixels of the PDP, and supplies the image data of each line to the subfield conversion unit. The subfield conversion unit divides each pixel data of the image data for each line into a plurality of bits corresponding to a plurality of subfields, and serially outputs each bit of each pixel data to the address driver for each rust field. . Address driver is power supply circuit 11
The sub-field converter 1 is connected to the converter 1 and converts data serially provided for each subfield from the subfield converter to parallel data, and drives a plurality of address electrodes based on the parallel data.

The discharge control timing generation circuit generates discharge control timing signals SC and SU based on the horizontal synchronizing signal H and the vertical synchronizing signal V, and supplies them to the scan driver and the sustain driver, respectively. The scan driver includes an output circuit 121 and a shift register 122. Also,
The sustain driver uses the output circuit 131 and shift register 1
Including 32. These scan driver and sustain driver are connected to a common power supply circuit 123.

The shift register of the scan driver supplies the discharge control timing signal SC supplied from the discharge control timing generation circuit to the output circuit while shifting in the vertical scanning direction. The output circuit sequentially drives the plurality of scan electrodes in response to the discharge control timing signal SC provided from the shift register.

The shift register of the sustain driver supplies the discharge control timing signal SU supplied from the discharge control timing generation circuit to the output circuit while shifting in the vertical scanning direction. The output circuit sequentially drives the plurality of sustain electrodes in response to the discharge control timing signal SU given from the shift register.

FIG. 9 is a timing chart showing the driving voltage applied to each electrode of PDP 100. In FIG. 9, the horizontal axis represents time, and the vertical axis represents voltage. In FIG.
The driving voltages of the address electrode, the sustain electrode, and the nth to (n + 2) th scan electrodes are shown.
Here, n is an arbitrary integer. As shown in FIG. 5, during the light emission period, a sustain pulse (Psu) is applied to the sustain electrode at a constant cycle. During the address period, a write pulse (Pw) is applied to the scan electrode. In synchronization with this write pulse, a write pulse (Pw
a) is applied. ON / OFF of the write pulse (Pwa) applied to the address electrode is controlled according to each pixel of the image to be displayed. When the write pulse (Pw) and the write pulse (Pwa) are simultaneously applied, an address discharge occurs in a discharge cell at the intersection of the scan electrode and the address electrode, and the discharge cell is turned on. In the sustain period after the address period, a sustain pulse (Psc) is applied to the scan electrode at a constant cycle. The phase of the sustain pulse (Psc) applied to the scan electrode is shifted by 180 degrees from the phase of the sustain pulse (Psc) applied to the sustain electrode. In this case, the sustain discharge occurs only in the discharge cells lit by the address discharge. At the end of each subfield, an erase pulse (Pe) is applied to the scan electrode. Thereby, the wall charge of each discharge cell is reduced to such an extent that disappearance or sustain discharge does not occur, and the sustain discharge ends. During a pause period after the application of the erase pulse (Pe), a pause pulse (Pr) is applied to the scan electrode at a constant cycle. This pause pulse (Pr) has the same phase as the sustain pulse (Psu).

The details of the driving method during the sustain period are as described in the above [Driving Method].

Embodiment 2 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0138] The driving method of the plasma display panel described in this embodiment and the display device using the same include at least three kinds of electrodes, the first electrode 1 and the second electrode.
2, for a plasma display panel having a third electrode 3, between the first electrode 1 and the second electrode 2, and between the first electrode 1 and the third electrode 3.
A step of causing a potential difference between the first and second electrodes 2 and / or a step of causing a discharge current Imain to flow between the first electrode 1 and the second electrode 2 to emit light; And / or second
On the electrode 2 side, a back electromotive force Vemf-ma that suppresses fluctuations in the discharge current
generating in, between the third electrode 3 and the second electrode 2, or /
And a process of flowing a discharge current Isub between the first electrode 1 and the third electrode 3, and a back electromotive force Ve that suppresses fluctuation of the discharge current on the third electrode 3 side.
It has a process of generating mf-sub.

Further, a process of generating a back electromotive force Vemf-C on the first electrode 1 side and / or the second electrode 2 side for suppressing fluctuations in the charge / discharge current of the panel flowing when the potential difference is generated. Have

Also, the peak value of the discharge current Imain is
It is characterized in that it is reduced by 10% or more by the back electromotive force Vemf-main.

The discharge current Isub between the third electrode 3 and the second electrode 2 or / and between the first electrode 1 and the third electrode 3 is reduced by the first electrode 1
Characterized in that 10% or more of the discharge current Imain flows between the first electrode 2 and the second electrode 2.

Further, the potential of the first electrode 1 and the potential of the second electrode 2 are changed simultaneously with respect to the third electrode 3.

In the process of generating a potential difference between the first electrode 1 and the second electrode 2, the rate of change of the potential is 1.0 V
/ ns or more.

Further, the invention is characterized in that the back electromotive force Vemf-main is changed according to the display amount.

Hereinafter, the present embodiment will be described with reference to specific examples, but the embodiments of the present invention are not limited thereto.

[Panel Structure] The structure of the panel is the same as that of the first embodiment.

[Driving Method] FIG. 2 shows that the first electrode 1 and the
3 shows a voltage waveform applied to a second electrode 2 and a third electrode.

By applying these voltages, the first
A potential difference is generated between the electrode 1 and the second electrode 2 and between the first electrode 1 and the third electrode 3, and the panel is charged by setting the first electrode 1 to be positive and the second electrode 2 and the third electrode 3 to be negative. are doing. At this time, with respect to the third electrode 3, the potentials of the first electrode 1 and the second electrode 2 were simultaneously changed.
Further, a voltage was applied so that the change speed of the potential was 1.0 V / ns or more. Furthermore, in order to generate a back electromotive force Vemf-C that suppresses fluctuations in the charging current of the panel,
An inductance of 100 μH was inserted. Therefore, when actually observing the voltage and current waveforms of the first electrode 1, the second electrode 2, and the third electrode 3, the results are as shown in FIG. This makes it possible to increase the electric field intensity applied between the first electrode 1 and the second electrode 2 immediately before the start of discharge.

Next, when the discharge starts, a discharge current Imain flows between the first electrode 1 and the second electrode 2 to emit light. At this time, the 100 μH inductance inserted on the first electrode 1 side of the circuit is used as it is in order to generate the back electromotive force Vemf-main for suppressing the fluctuation of the discharge current. As a result, the discharge current Imain
Is small and a gentle current waveform is obtained. At this time, when observing the positive column, it can be seen that it is strongly thick and very stable. Further, at the same time when the discharge starts, a discharge current Isub flows between the third electrode 3 and the second electrode 2 to which no voltage is applied. In this way, by flowing the discharge current Isub, the discharge current Isub suppressed by the back electromotive force Vemf-main
The decrease in main (the decrease in wall charge) can be compensated for, and the positive column discharge in the next cycle can be generated at a low voltage. At this time, the back electromotive force that suppresses the fluctuation of the discharge current
In order to generate Vemf-sub, 100
A μH inductance was inserted. Thereby, the third electrode
The discharge current Isub flowing through 3 can be suppressed to a necessary minimum. If the back electromotive force Vemf-C is not generated, an inductance may be inserted immediately before the discharge.

By driving in this way, the first
The distance between the electrode 1 and the second electrode 2 is 0.5 mm, the first substrate 11,
With a panel in which the distance between the opposing second substrates 12 was 0.12 mm, a sustain voltage of 245 V and a luminous efficiency of about 2.6 lm / W could be obtained. Further, the deterioration of the phosphor layer formed on the third electrode 3 could be suppressed.

The back electromotive force Vemf due to the inductance
In the phenomenon when -main is not generated, when the magnitude of the inductance is changed, when the drive voltage is increased, or in the process of generating a potential difference between the first electrode 1 and the second electrode 2, A phenomenon when the rate of change of the potential is changed, a means for generating the back electromotive force Vemf-main, Vemf-C, a means for forcibly flowing the discharge current Isub, and a back electromotive force for the display amount. The means for controlling Vemf-main and the like are the same as in the first embodiment.

[Display Apparatus] The display apparatus is the same as that of the first embodiment. The details of the driving method during the sustain period are as described in [Driving Method] above.

Embodiment 3 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

The plasma display device described in this embodiment is different from the plasma display panel having at least three types of electrodes, the first electrode 1, the second electrode 2, and the third electrode 3, in that the first electrode 1 A process of generating a potential difference between the two electrodes 2 and between the first electrode 1 and the third electrode 3, or / and between the third electrode 3 and the second electrode 2, and discharging between the first electrode 1 and the second electrode 2; Current Imai
The process of causing n to flow and emitting light, and the back electromotive force Vemf for suppressing the variation of the discharge current is applied to the first electrode 1 side and / or the second electrode 2 side.
The method includes a step of generating -main and a step of flowing a discharge current Isub between the third electrode 3 and the second electrode 2 or / and between the first electrode 1 and the third electrode 3.

The distance between the first electrode 1 and the second electrode 2 is 0.2 mm or more.

In addition, the first electrode 1 and the second electrode 2
The distance between the first substrate 11 and the opposing second substrate 12 formed on the substrate 11 is 0.15 mm or more.

Further, a plurality of the third electrodes 3 are formed in one display cell (minimum display unit).

Further, a projection is formed between a plurality of the third electrodes 3 formed in one display cell (minimum display unit).

Further, the first electrode 1 and the second electrode 2
The first substrate 1 is formed on a substrate 11 so that the third electrode 3 intersects the first electrode 1 and the second electrode 2 via a dielectric.
1 is characterized by being formed.

Further, the first electrode 1 and the second electrode 2
The third electrode 3 is formed on a second substrate 12 facing the first substrate 11 so that the third electrode 3 intersects with the first electrode 1 and the second electrode 2. I do.

Further, the first electrode 1 and the second electrode 2
A float electrode is formed on the substrate 11 and is formed between adjacent display cells (minimum display units) on the first substrate 11.

Hereinafter, the present embodiment will be described with reference to specific examples, but the embodiments of the present invention are not limited thereto.

[Driving method] is the same as in the first embodiment. [Display device] is basically the same as that of the first embodiment, but the structure of the panel is different. Hereinafter, only different portions will be described.

[Panel Structure] FIG. 1 is a perspective view of a plasma display panel (PDP) used in the first embodiment. The PDP shown in FIG. 1 is composed of first electrodes substantially parallel to each other on the inner surface of one first substrate 11 in a pair of substrates sandwiching a discharge space.
1, having a second electrode, a third electrode 3 intersecting the first electrode 1 and the second electrode 2 on the inner surface of the other second substrate 12, and a partition for dividing a discharge space for each unit light emitting region EU 16 and a phosphor 17 that emits light by discharge. The distance between the first electrode 1 and the second electrode 2 is 0.2 mm or more.

When the driving method of this embodiment is applied to the panel of FIG. 1, the distance between the first electrode 1 and the second electrode 2 is 0.5 mm, and the second substrate opposing the first substrate 11 The distance between the substrates 12
With a 0.12 mm panel, a sustain voltage of 245 V and a luminous efficiency of 2.54 lm / W were obtained. This is the result shown in the first embodiment.

The first substrate 11
The same driving was performed while changing the distance between the opposing second substrates 12 from 0.12 mm to 0.25 mm. As a result, it was found that the luminous efficiency was particularly increased at 0.15 mm or more. For example,
Assuming that the distance between one substrate 11 and the opposing second substrate 12 was 0.18 mm, a sustaining voltage of 240 V and a luminous efficiency of 2.78 lm / W could be obtained.

In the PDP of FIG. 10, a plurality of the third electrodes 3 are formed in one display cell (minimum display unit).

When the driving method of this embodiment is applied to the panel of FIG. 10, the distance between the first electrode 1 and the second electrode 2 is 0.5 mm, and the second substrate opposing the first substrate 11 Panel with distance between substrates 12 of 0.12mm, sustain voltage 245V, luminous efficiency 2.94lm / W
Could be obtained.

Further, the distance between the first electrode 1 and the second electrode 2 is
0.5 mm, the distance between the first substrate 11 and the opposing second substrate 12 is 0.1
With an 8mm panel, a sustain voltage of 250V and a luminous efficiency of 3.14lm / W were obtained. Note that the luminous efficiency can be further increased by increasing the number of the third electrodes 3.

In the PDP of FIG. 11, a projection 18 is formed between a plurality of the third electrodes 3 formed in one display cell (minimum display unit).

When the driving method according to the present embodiment is applied to the panel of FIG. 11, the distance between the first electrode 1 and the second electrode 2 is 0.5 mm, and the second substrate opposing the first substrate 11 With a panel in which the distance between the substrates 12 was 0.18 mm and the height of the projections 18 was 0.12 mm, a sustain voltage of 250 V and a luminous efficiency of 3.40 lm / W could be obtained.

In the PDP of FIG. 12, a first electrode 1 and a second electrode 2 are formed on a first substrate 11, and a float electrode 4 is formed between adjacent display cells (minimum display units) on the first substrate 11. ing.

By applying the driving method according to the present embodiment to the panel shown in FIG. 12, crosstalk and flickering of discharge could be suppressed. Furthermore, the above float electrode
4 is the adjacent display cell on the first substrate 11 (minimum display unit)
By forming a plurality of them and connecting them, it was possible to further suppress the flickering of the discharge.

In the PDP shown in FIG. 13, a first electrode 1 and a second electrode 2 are formed on a first substrate 11, and a third electrode 3 intersects the first electrode 1 and the second electrode 2 via a dielectric. Are formed on the first substrate 11. As a result, a material having a high secondary electron emission coefficient, for example, MgO can be used as a protective film on all three types of electrodes.

By applying the driving method according to the present embodiment to the panel of FIG. 13, the sustain voltage could be lowered by about 10V. Furthermore, it was found that the third electrode could be used as a cathode.

In the PDP of FIG. 14, the first electrode 1 and the second electrode 2 are formed on the first substrate 11, and the third electrode 3 intersects the first electrode 1 and the second electrode 2 via a dielectric. Are formed on the first substrate 11. Further, a plurality of the third electrodes 3 are formed in one display cell (minimum display unit).

By applying the driving method according to the present embodiment to the panel shown in FIG. 14, the sustain voltage can be reduced, and the luminous efficiency can be increased.

In the PDP shown in FIG. 15, a first electrode 1 and a second electrode 2 are formed on a first substrate 11, and a third electrode 3 intersects the first electrode 1 and the second electrode 2 via a dielectric. Are formed on the first substrate 11. Further, a protrusion 18 is formed between the plurality of third electrodes 3 formed in one display cell (minimum display unit).

By applying the driving method according to the present embodiment to the panel shown in FIG. 15, the sustain voltage can be reduced, and the luminous efficiency can be further increased.

(Embodiment 4) The outline of the structure of a PDP according to a fourth embodiment of the present invention is the same as that shown in FIG. FIG. 16 is a block diagram of a PDP device using the PDP of the present invention. In FIG. 16, 10
0 is a PDP, 101 is an address electrode driver, 102
Is a scan electrode driver, 103 is a sustain electrode driver, 104 is a discharge control timing generation circuit section, 1
05 is a subfield processing unit, 106 is a memory unit, 10
Reference numeral 7 denotes an A / D converter (analog / digital converter), reference numeral 108 denotes a synchronization signal separation processing unit, and reference numeral 109 denotes a video signal.

The video signal 109 is output from the A / D converter 1
In step 07, the analog signal is converted into a digital signal, video data for one field is stored in the memory unit 106, separated into video data adapted to a plurality of subfields in the subfield processing unit 105, and supplied to the address electrode 7 driver. It is output as data for each horizontal line. Also,
The discharge control timing generation circuit 104 outputs a discharge control timing signal based on the number of subfields and the horizontal and vertical synchronization signals to the sustain electrode driver 103, scan electrode driver 102, and address electrode driver 101.

The PDP device configured as described above will be described in detail.

A horizontal synchronizing signal and a vertical synchronizing signal are supplied from the synchronizing signal separation processing section 108 to the A / D converter 107, the memory section 106, the subfield processing section 105 and the discharge control timing generating circuit section 104.

The video signal 109 is output from the A / D converter 10.
7 is input. The A / D converter 107 converts the video signal 109 into digital data of, for example, 8 bits and 256 gradations, and outputs the image data to the memory unit 106. The memory unit 106 has 8 bits for one field
Stores 256-level digital data and outputs data for each bit to the subfield processing unit 105.

The subfield processing section 105 converts digital data for each field into digital data for each subfield corresponding to the number of subfields. For example, in the case of 8 subfields, the data for each bit is used as it is for each subfield, but if the number of subfields is 12, in the upper bits, there are a plurality of subfields for one bit. Become.
Further, the sub-fields are selected so that the sub-fields for display and emission are temporally continuous. In this way, the selected pixel data for each subfield is output to the address electrode driver 101 as data for each horizontal line. Further, information on the number of subfields is output to the discharge control timing generation circuit 104.

The discharge control timing generation circuit section 104
A discharge control timing signal is generated based on the horizontal synchronization signal and the vertical synchronization signal from the synchronization signal separation processing unit 108 and the information on the number of subfields from the subfield processing unit 105, and the scan electrode driver 102 and the sustain electrode It is given to the driver 103 and the address electrode driver 101, respectively. This signal includes an initialization period, an address period, a sustain period, and an erasing period, as in the conventional example.

FIG. 17 is a block diagram mainly showing the configuration of the PDP drive circuit section of the PDP device shown in FIG. As shown in FIG. 17, the PDP includes a plurality of address electrodes 7, a plurality of scan electrodes 2, and a plurality of sustain electrodes 3.
Is included. The plurality of address electrodes 7 are arranged in the vertical direction of the screen, and the plurality of scan electrodes 2 and the sustain electrodes 3 are arranged in the horizontal direction of the screen. A discharge cell is formed at the intersection of the address electrode 7, the scan electrode 2 and the sustain electrode 3, and one discharge cell of R, G and B colors is used.
A pixel.

The address electrode driver 101 comprises:
It comprises an address driver 200. The address driver 200 corresponds to the subfield processing unit 105 shown in FIG.
, A plurality of address drivers 2 based on parallel data for each horizontal line given for each subfield from
Drive 00. In the sustain period and the erase period, a sustain pulse Psus and an erase pulse Pera synchronized with the sustain electrode driver 103 are output.

The scan electrode driver 102 includes a scan driver 202 and a sustain driver 201. The scan driver 202 sequentially drives the plurality of scan electrodes 2 by the plurality of scan pulses Pscn obtained by shifting the discharge control timing signal given from the discharge control timing generation circuit 104 in FIG. 16 in the vertical scan direction. In the initialization period, a setup pulse Pset is output to the plurality of scan electrodes 2 all at once. In the sustain period, a sustain pulse Psus synchronized with the sustain electrode driver 103 is simultaneously output to the plurality of scan electrodes 2.

The sustain electrode driver 103 includes a sustain driver 201 and an erase driver 203. The coil 30 is connected in series between the sustain driver and the sustain electrode, and the pulse waveform applied to the sustain electrode has a projection and a depression.

In each driver, a plurality of sustain electrodes 3 are simultaneously driven by a discharge control timing signal provided from discharge control timing generating circuit 104 in FIG.

The basic technical idea of the present invention is that, in a three-electrode surface discharge type ACPDP, the distance between the sustain electrode and the scan electrode on the front glass substrate is increased and the discharge state is changed from negative glow to positive column. And to stabilize the discharge state and improve the screen luminance and the light emission luminance.
In the PDP of the present invention, the distance between the sustain electrode and the scan electrode is larger than that of the conventional PDP.
High voltage is required. However, if the high voltage is continuously applied, the discharge current becomes excessive, and the luminous efficiency and the screen brightness are not improved. Therefore, the driving method of the PDP of the present invention is to adjust the discharge current by the voltage drop so that the amount of current becomes the optimum after the start of discharge. In addition, since a high voltage is applied first, a counter discharge is easily generated, and a conventional PDP is used.
The discharge current due to the opposed discharge also increases, which helps to adjust the amount of current optimal for the positive column discharge.

More specifically, the distance between the sustain electrode and the scan electrode on the front glass substrate of the PDP is increased to 200 μm, and the sustain pulse applied to each electrode during the sustain period is set as the sustain pulse shown in FIG. When an existing waveform was applied, the discharge state was changed from a negative glow to a discharge mainly composed of a positive column, and the screen luminance and the luminous efficiency were higher than those of a conventional PDP having a distance between electrodes. In FIG. 18, the horizontal axis is the time axis, and the vertical axis represents the voltage, (a) is the waveform of the pulse applied to the scan electrode, (b) is the waveform of the pulse applied to the sustain electrode, and (c) is The waveform of the potential difference between the scan electrode and the sustain electrode is shown. However, in this case, the discharge stops when the address electrode is connected to an arbitrary voltage such as GND.

Here, as shown in FIG. 19, the pulse width of the applied sustain pulse is set to a half cycle (60 μsec cycle).
In the case of c, it is set to 30 μsec). If there is no pause period in the sustain pulse and there is no period in which the sustain electrode and the scan electrode have the same potential, and if the potential change is not stair-like but linear, the address electrode can be set to any Even if it is connected to the potential of the positive column, the discharge of the positive column does not stop. In FIG. 19, the horizontal axis is the time axis, and the vertical axis represents the voltage. (A) is the waveform of the pulse applied to the scan electrode, (b) is the waveform of the pulse applied to the sustain electrode, and (c) is The waveform of the potential difference between the scan electrode and the sustain electrode is shown.

In this case, since part of the surface discharge current flows to the address electrode, the screen brightness is slightly lower than when the address electrode is not connected to an arbitrary potential. However, the applied voltage becomes 300 V, which is higher than that of the conventional method, and the luminous efficiency is about 1 to 1.5 (lm / W).

Here, a 100 μH coil is connected in series to the sustain electrode. As a result, the sustain pulse has an overshoot shape having ringing as shown in FIG. 20, and a protrusion 205 and a depression 206 are generated. 20, the horizontal axis is the time axis, the vertical axis represents the voltage, (a) is the waveform of the pulse applied to the scan electrode,
(B) is a waveform of a pulse applied to the sustain electrode before connecting the coil, (c) is a waveform of a pulse applied to the sustain electrode after connecting the coil, and (d) is a waveform between the scan electrode and the sustain electrode after connecting the coil. The waveforms of the potential difference are shown below. As a result, a discharge current also flows to the address electrodes on the rear substrate, and a counter discharge occurs. The discharge current used for this opposed discharge is about 3 of the sum of the surface discharge current and the opposed discharge current.
0% or more was moved, the surface discharge current amount was reduced, and the discharge state of the positive column was stabilized as compared with the conventional driving method. The luminous efficiency here was about 1.5 to 2 (lm / W). An experiment was conducted with the inductance of the coil changed, and the effect was exhibited when the opposing discharge current was about 30% or more of the sum of the surface discharge current and the opposing discharge current at 100 μH or more.

Next, the potential change rate of the sustain pulse applied in the discharge space was increased from about 0.9 V / nsec to about 1.6 V / nsec. FIG. 21 and FIG.
FIG. 4 shows the relationship between the potential change rate of the sustain pulse applied in the discharge space and the discharge current when a coil is inserted on the sustain electrode side. FIG. 21 shows a potential change rate of about 0.9 V.
/ Nsec shows the discharge current. In FIG.
The horizontal axis is the time axis, the vertical axis represents the voltage, (a) is the waveform of the pulse applied to the scan electrode, (b) is the waveform of the pulse applied to the sustain electrode after connecting the coil, and (c) is The waveform of the potential difference between the scan electrode and the sustain electrode after the coil is connected, and (d) shows the state of the discharge current. Further, Ic indicates a charging current, and Id indicates a discharging current. A discharge current flows before the sustain pulse on the scan electrode side completely rises or immediately after the sustain pulse rises. In contrast, FIG.
Indicates a discharge current when the potential change speed is set to 1.6 V / nsec. In FIG. 22, the horizontal axis is the time axis, the vertical axis represents the voltage, (a) is the waveform of the pulse applied to the scan electrode, (b) is the waveform of the pulse applied to the sustain electrode after connecting the coil, (C) shows the waveform of the potential difference between the scan electrode and the sustain electrode after connection of the coil, and (d) shows the state of the discharge current. Ic is the charging current, Ic
d indicates a discharge current. In this case, the sustain pulse on the scan electrode side completely rises, and the discharge current flows at intervals of 50 nsec or more. As a result, the minimum sustain voltage becomes 250V. FIG. 23 shows the relationship between the sustain pulse applied voltage and the screen luminance. In the conventional driving method, the screen luminance and the applied voltage are in a proportional relationship, but there is a voltage region in which the relationship between the screen luminance and the applied voltage is inversely proportional due to the rise of the sustain pulse rising and the falling speed. As a result, the screen luminance and the luminous efficiency show the maximum values at the minimum sustain voltage, and are approximately 2.5 (lm / W).
I got the above. Similarly, an experiment was performed by changing the potential change speed, and an effect was observed when the potential change speed was 1.0 V / nsec or more.

The experiment was conducted by changing the distance between the sustain electrode and the scan electrode from 100 μm to 500 μm, and the same effect was obtained at 200 μm or more.

In this embodiment, the coil is connected in series to the sustain electrode. However, the same effect can be obtained when the coil is connected to the scan electrode or when both the sustain electrode and the scan electrode are connected. .

[0200]

As is clear from the embodiment of the present invention, at least three types of electrodes, the first electrode 1, the second electrode 2, and the third electrode
For a plasma display panel having electrodes 3,
Generating a potential difference between the first electrode 1 and the second electrode 2, and between the first electrode 1 and the third electrode 3, or / and between the third electrode 3 and the second electrode 2, A step of causing a discharge current Imain to flow between the two electrodes 2 to emit light, and a step of generating a back electromotive force Vemf-main on the first electrode 1 side and / or the second electrode 2 side to suppress fluctuations in the discharge current. Between the third electrode 3 and the second electrode 2, or / and
The method of driving a plasma display panel having a process of flowing a discharge current Isub between the first electrode 1 and the third electrode 3 suppresses the fluctuation of the discharge current Imain with the back electromotive force Vemf-main and stably forms a positive column discharge. It is possible to suppress flickering of discharge. In addition, the positive column discharge thus formed has a very high efficiency and can obtain a strong luminous intensity. In addition, by flowing the discharge current Isub, the decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main can be compensated, and the positive column discharge in the next cycle can be performed at a low voltage. Can be generated.

Note that the effect of the present invention is that a mixed gas of Xe / Ne (Xe5
% To 15% and a gas pressure of 300 to 760 torr), but it can be easily analogized that the effect of the present invention can be obtained outside this range as long as the plasma discharge is established.

As described above, by controlling the positive column discharge, it is possible to provide a plasma display panel capable of achieving high luminance, high luminous efficiency and stable discharge.

[Brief description of the drawings]

FIG. 1 is a perspective view of a plasma display panel (PDP) according to Embodiment 1 of the present invention.

FIG. 2 is a characteristic diagram of a voltage waveform output from a circuit to each electrode according to the first embodiment.

FIG. 3 is a characteristic diagram of voltage and current waveforms observed at each electrode according to the first embodiment.

FIG. 4 is a characteristic diagram of voltage and current waveforms of each electrode when back electromotive force Vemf-main according to the first embodiment is not generated.

FIG. 5 is a characteristic diagram of a waveform of an applied voltage when a back electromotive force is generated by a pulse according to the first embodiment.

FIG. 6 is a characteristic diagram of a waveform of an applied voltage when forcibly flowing a discharge current Isub in the first embodiment.

FIG. 7 is a block diagram showing a configuration of a display device according to the first embodiment.

FIG. 8 is a conceptual diagram for explaining an ADS method according to the first embodiment.

FIG. 9 is a timing chart showing a drive voltage applied to each electrode of the PDP according to the first embodiment.

FIG. 10 is an exploded perspective view of a plasma display panel (PDP) according to the third embodiment.

FIG. 11 is an exploded perspective view of a plasma display panel (PDP) in Embodiment 3;

FIG. 12 is an exploded perspective view of a plasma display panel (PDP) according to the third embodiment.

FIG. 13 is an exploded perspective view of a plasma display panel (PDP) according to the third embodiment.

FIG. 14 is an exploded perspective view of a plasma display panel (PDP) according to the third embodiment.

FIG. 15 is an exploded perspective view of a plasma display panel (PDP) according to the third embodiment.

FIG. 16 is a block diagram showing a configuration of a PDP device according to the fourth embodiment.

FIG. 17 is an enlarged view of a panel driving unit according to the third embodiment.

FIG. 18 is a timing chart of a sustain pulse in the third embodiment.

FIG. 19 is a timing chart of a sustain pulse in the third embodiment.

FIG. 20 is a timing chart of a sustain pulse in the third embodiment.

FIG. 21 is a conceptual diagram showing a relationship between a sustain pulse and a discharge current in the third embodiment.

FIG. 22 is a conceptual diagram showing a relationship between a sustain pulse and a discharge current in the third embodiment.

FIG. 23 is a graph showing a relationship between a sustain pulse applied voltage and screen luminance in the third embodiment.

FIG. 24 is an exploded perspective view of a conventional surface discharge type PDP having a three-electrode structure.

[Explanation of symbols]

1 First electrode 2 Second electrode 3 Third electrode 4 Float electrode 5 MgO layer 6 Barrier 7 Address electrode 8 Phosphor 11 First substrate 12 Second substrate 13 Dielectric layer 14 Protective film 15 Dielectric layer (overcoat layer) 16 Partition wall 17 Phosphor 18 Projection 20 Transparent electrode 21 Scan electrode 22 Sustain electrode 23 Address electrode 24 Metal bus electrode 30 Coil 100 PDP 101 Address electrode driver 102 Scan electrode driver 103 Sustain electrode driver 104 Discharge control timing generation circuit 105 Subfield processing unit 106 Memory unit 107 A / D converter 108 Synchronization signal separation processing unit 109 Video signal 110 Address driver 111 Address driver power supply circuit 120 Scan driver 121 Scan driver output circuit 122 Scan driver shift register 123 Scan driver and Power supply circuit common to sustain driver 130 Sustain driver 131 Sustain driver output circuit 132 Sustain driver shift register 140 Discharge control timing generation circuit 151 A / D converter 152 Scanning number converter 153 Subfield converter 200 Address driver 201 Sustain driver 202 Scan driver 203 Erase driver 204 Setup driver 205 Projection Part 206 Depressed part

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) H01J 11/02 H01J 11/02 B (72) Inventor Yoshio Watanabe 3-10 Higashimita, Tama-ku, Kawasaki-shi, Kanagawa Prefecture No. 1 Matsushita Giken Co., Ltd. (72) Inventor Hiroki Kono 3-10-1, Higashi-Mita, Tama-ku, Kawasaki City, Kanagawa Prefecture EE29 FF12 GG12 HH02 HH04 HH05 JJ02 JJ04 JJ06

Claims (44)

[Claims] 1. A plasma display panel having at least a first electrode (1), a second electrode (2) and a third electrode (3), the first electrode (1) and the second electrode (2). And the step of generating a potential difference between the first electrode (1) and the third electrode (3) or / and between the third electrode (3) and the second electrode (2), Flowing a first discharge current (Imain) between a first electrode (1) and the second electrode (2) to emit light; and
Generating a first back electromotive force (Vemf-main) on the side or / and on the side of the second electrode (2) to suppress the fluctuation of the first discharge current; and A method for driving a plasma display panel, comprising a step of flowing a second discharge current (Isub) between the second electrodes (2) and / or between the first electrodes (1) and the third electrodes (3). 2. A plasma display panel having at least a first electrode (1), a second electrode (2) and a third electrode (3), the first electrode (1) and the second electrode (2). And the step of generating a potential difference between the first electrode (1) and the third electrode (3) or / and between the third electrode (3) and the second electrode (2), A second back electromotive force (Vemf-C) is generated on the first electrode (1) and / or the second electrode (2) to suppress fluctuations in the charge / discharge current of the panel flowing when the potential difference is generated. A step of causing a first discharge current (Imain) to flow between the first electrode (1) and the second electrode (2) to emit light; and
Generating a first back electromotive force (Vemf-main) on the (1) side or / and the second electrode (2) side for suppressing the variation of the first discharge current; and 3) between the second electrode (2) and / or between the first electrode (1) and the third electrode (3).
A method for driving a plasma display panel, comprising a step of flowing a discharge current (Isub) of the plasma display panel. 3. The first electrode (1) and the second electrode (2) for a plasma display panel having at least a first electrode (1), a second electrode (2) and a third electrode (3). And the step of generating a potential difference between the first electrode (1) and the third electrode (3) or / and between the third electrode (3) and the second electrode (2), Flowing a first discharge current (Imain) between a first electrode (1) and the second electrode (2) to emit light; and
Generating a first back electromotive force (Vemf-main) on the side or / and on the side of the second electrode (2) to suppress the fluctuation of the first discharge current; and Flowing a second discharge current (Isub) between the second electrodes (2) or / and between the first electrode (1) and the third electrode (3); A method of driving a plasma display panel, further comprising the step of generating a third back electromotive force (Vemf-sub) for suppressing fluctuations in discharge current. 4. The first electrode (1) and the second electrode (2) for a plasma display panel having at least a first electrode (1), a second electrode (2) and a third electrode (3). And the step of generating a potential difference between the first electrode (1) and the third electrode (3) or / and between the third electrode (3) and the second electrode (2), A second back electromotive force (Vemf-C) is generated on the first electrode (1) and / or the second electrode (2) to suppress fluctuations in the charge / discharge current of the panel flowing when the potential difference is generated. A step of causing a first discharge current (Imain) to flow between the first electrode (1) and the second electrode (2) to emit light; and
Generating a first back electromotive force (Vemf-main) on the (1) side or / and the second electrode (2) side for suppressing the variation of the first discharge current; and 3) between the second electrode (2) and / or between the first electrode (1) and the third electrode (3).
A method for driving a plasma display panel, comprising: a step of flowing a discharge current (Isub), and a step of generating a third back electromotive force (Vemf-sub) on the third electrode (3) side for suppressing fluctuations in the discharge current. 5. The peak value of the first discharge current (Imain) is:
5. The method according to claim 1, wherein the first back electromotive force (Vemf-main) reduces the voltage by 10% or more. 6. The method according to claim 1, wherein the current value of the second discharge current (Isub) is the first discharge current (Isub).
And the second discharge current (Isu).
The method according to any one of claims 1 to 5, wherein the sum of the current value and the current value of (b) is 10% or more. 7. The first electrode (1) and the third electrode (3) with respect to the third electrode (3).
7. The driving method for a plasma display panel according to claim 1, wherein the potentials of the two electrodes are changed simultaneously. 8. The method according to claim 1, wherein in the process of generating a potential difference between the first electrode (1) and the second electrode (2), the rate of change of the potential is 1.0 V / ns or more. The method for driving a plasma display panel according to any one of the above. 9. The driving method for a plasma display panel according to claim 1, wherein the first back electromotive force (Vemf-main) is changed according to a display amount of the plasma display panel. . 10. A plasma display device for driving a plasma display panel by the method for driving a plasma display panel according to claim 1. 11. The distance between the first electrode (1) and the second electrode (2) is
The plasma display device according to claim 10, wherein the thickness is 0.2 mm or more. 12. The first electrode (1) and the second electrode (2) are connected to a first substrate (1).
1), the first substrate (11) and the opposing second substrate (1
12. The plasma display device according to claim 10, wherein the distance between 2) is 0.15 mm or more. 13. A plurality of third electrodes (3) are formed in one display cell, which is a minimum display unit of a plasma display panel.
The plasma display device according to any one of the above. 14. A plurality of third display cells formed in one display cell which is a minimum display unit of a plasma display panel.
14. The plasma display device according to claim 10, wherein a protrusion (18) is formed between the electrodes (3). 15. A first substrate (1) comprising a first electrode (1) and a second electrode (2).
1), the first substrate such that a third electrode (3) intersects the first electrode (1) and the second electrode (2) via a dielectric.
15. The plasma display device according to claim 10, wherein the plasma display device is formed in (11). 16. A first substrate (1) comprising a first electrode (1) and a second electrode (2).
1), the third electrode (3) is the first electrode (1) and the third electrode (3)
The plasma display device according to any one of claims 10 to 14, wherein the plasma display device is formed on a second substrate (12) facing the first substrate (11) so as to cross the two electrodes (2). . 17. A first substrate (1) comprising a first electrode (1) and a second electrode (2).
17. The plasma display device according to claim 10, wherein a float electrode (4) is formed between adjacent display cells on the first substrate (11). . 18. A semiconductor device comprising: a first substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate;
A driving method for a plasma display panel in which a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of a substrate, and address electrodes are arranged perpendicularly to the scan electrodes on an inner surface of the second substrate. A method of driving a plasma display panel, wherein a projection and / or a depression is provided in a waveform of a sustain pulse applied to the scan electrode and / or the sustain electrode. 19. A method according to claim 19, further comprising a first substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate.
A driving method for a plasma display panel in which a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of a substrate, and address electrodes are arranged perpendicularly to the scan electrodes on an inner surface of the second substrate. A driving method of a plasma display panel, wherein a projection and / or a depression is provided in a waveform of a potential difference between the scan electrode and the sustain electrode. 20. A semiconductor device comprising: a first substrate; a second substrate; and a discharge space formed by the first substrate and the second substrate.
A driving method for a plasma display panel in which a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of a substrate, and address electrodes are arranged perpendicularly to the scan electrodes on an inner surface of the second substrate. The waveform of the sustain pulse applied to the scan electrode and / or the sustain electrode is such that a voltage sufficient for starting the discharge is applied, the voltage drops with the increase of the discharge current after the start of the discharge, and the discharge again after the end of the discharge. A method for driving a plasma display panel, wherein the voltage is maintained so that the voltage does not start. 21. A semiconductor device comprising: a first substrate; a second substrate; and a discharge space formed by the first substrate and the second substrate.
A driving method for a plasma display panel in which a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of a substrate, and address electrodes are arranged perpendicularly to the scan electrodes on an inner surface of the second substrate. The waveform of the potential difference between the scan electrode and the sustain electrode applies a voltage sufficient for starting discharge,
A method for driving a plasma display panel, characterized in that a voltage drops with an increase in discharge current after the start of discharge, and a voltage that does not start discharge again after the end of discharge. 22. A semiconductor device comprising: a first substrate; a second substrate; and a discharge space formed by the first substrate and the second substrate.
A driving method for a plasma display panel in which a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of a substrate, and address electrodes are arranged perpendicularly to the scan electrodes on an inner surface of the second substrate. A driving method of a plasma display panel, wherein a waveform of a sustain pulse applied to the scan electrode and / or the sustain electrode has an overshoot shape. 23. A semiconductor device comprising: a first substrate; a second substrate; and a discharge space formed by the first substrate and the second substrate.
A driving method for a plasma display panel in which a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on an inner surface of a substrate, and address electrodes are arranged perpendicularly to the scan electrodes on an inner surface of the second substrate. A driving method of a plasma display panel, wherein a waveform of a potential difference between the scan electrode and the sustain electrode has an overshoot shape. 24. By providing a projection and / or a depression in a waveform of a sustain pulse applied to a scan electrode and / or a sustain electrode, a peak value of a discharge current flowing between the scan electrode and the sustain electrode is 10%. 19. The method according to claim 18, wherein the number is reduced. 25. By providing a projection and / or a depression in the waveform of the potential difference between the scan electrode and the sustain electrode, the peak value of the discharge current flowing between the scan electrode and the sustain electrode is 10%. 20. The method according to claim 19, wherein the number is reduced. 26. A waveform of a sustain pulse applied to a scan electrode and / or a sustain electrode is a waveform that drops in voltage with an increase in discharge current after the start of discharge, and thus flows between the scan electrode and the sustain electrode. 21. The method according to claim 20, wherein the peak value of the discharge current decreases by 10% or more. 27. Since the waveform of the potential difference between the scan electrode and the sustain electrode is a waveform in which the voltage drops as the discharge current increases after the start of the discharge, the discharge current flowing between the scan electrode and the sustain electrode 22. The method of driving a plasma display panel according to claim 21, wherein a peak value of the peak value decreases by 10% or more. 28. Since the waveform of a sustain pulse applied to a scan electrode and / or a sustain electrode has an overshoot shape, a peak value of a discharge current flowing between the scan electrode and the sustain electrode is reduced by 10% or more. The method of driving a plasma display panel according to claim 22, wherein: 29. Since the waveform of the potential difference between the scan electrode and the sustain electrode has an overshoot shape, the peak value of the discharge current flowing between the scan electrode and the sustain electrode is reduced by 10% or more. 24. The method of driving a plasma display panel according to claim 23, wherein: 30. A semiconductor device comprising: a first substrate; a second substrate; and a discharge space formed by the first substrate and the second substrate.
For a plasma display panel in which a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on the inner surface of the substrate, and address electrodes are arranged perpendicularly to the scan electrodes on the inner surface of the second substrate. A method for driving a plasma display panel, comprising simultaneously generating a surface discharge as a discharge between a sustain electrode and a scan electrode and a facing discharge as a discharge between a sustain electrode or a scan electrode and an address electrode. 31. The driving method of a plasma display panel according to claim 30, wherein the discharge current value of the opposed discharge is 10% or more of the sum of the discharge current value of the surface discharge and the discharge current value of the opposed discharge. . 32. A plasma display device using the method of driving a plasma display panel according to claim 18. 33. A semiconductor device comprising: a first substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate;
For a plasma display panel in which a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on the inner surface of the substrate, and address electrodes are arranged perpendicularly to the scan electrodes on the inner surface of the second substrate. A plasma display device, wherein an inductance is connected in series to the scan electrode and / or the sustain electrode. 34. A peak value of a discharge current flowing between the scan electrode and the sustain electrode is reduced by 10% or more by connecting an inductance in series with the scan electrode and / or the sustain electrode. The plasma display device according to claim 33, wherein: 35. The driving method of a plasma display panel according to claim 18, wherein the address electrodes are connected to a predetermined potential. 36. The plasma display device according to claim 32, wherein the address electrode is connected to a predetermined potential. 37. The driving method of a plasma display panel according to claim 18, wherein a period during which the potential of the sustain electrode and the potential of the scan electrode are the same is less than 500 ns. 38. The plasma display device according to claim 32, wherein a period during which the potential of the sustain electrode and the potential of the scan electrode are the same is less than 500 ns. 39. The plasma display panel according to claim 18, wherein an absolute value of a displacement rate of a voltage applied to the discharge space is 1.0 V / ns or more. Drive method. 40. The plasma display device according to claim 32, wherein the absolute value of the displacement speed of the voltage applied to the discharge space is 1.0 V / ns or more. 41. The plasma display device according to claim 32, wherein the distance between the first substrate and the second substrate is 0.15 mm or more. 42. A plurality of address electrodes are formed in one display cell which is a minimum display unit of the plasma display panel.
43. The plasma display device according to any one of items 4, 36, 38, 40 or 41. 43. The plasma display according to claim 42, wherein a projection is formed between a plurality of address electrodes formed in one display cell which is a minimum display unit of the plasma display panel. apparatus. 44. The method according to claim 32, wherein a float electrode is formed between adjacent display cells on the first substrate. Plasma display device.