JP3424602B2 - Driving method of plasma display panel and display device using the same - Google Patents

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 particularly to at least three types of electrodes, a first electrode 1,
For a plasma display panel having a second electrode 2 and a third electrode 3, between the first electrode 1 and the second electrode 2, and between the first electrode 1 and the second electrode 3.
The process of generating a potential difference between the three electrodes 3 and / or between the third electrode 3 and the second electrode 2, and the discharge current Im between the first electrode 1 and the second electrode 2.
Back electromotive force Ve that suppresses the fluctuation of the discharge current on the process of flowing ain to emit light and on the first electrode 1 side and / or the second electrode 2 side
The process of generating mf-main and between the third electrode 3 and the second electrode 2,
And / or a driving method of a plasma display panel having 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 panel (PDP)
Is a flat panel display technology because it can display at a higher speed than a liquid crystal panel, has a wide viewing angle, can be easily upsized, and has a high display quality because it is a self-luminous type. And recently it has been attracting a lot of attention.
Generally, in PDP, ultraviolet rays are generated by gas discharge,
This ultraviolet light excites the phosphor to emit light, thereby performing color display. The display cell divided by the partition is provided on the substrate, and the phosphor layer is formed on the display cell. In particular, the mainstream of PDPs at present is a surface discharge PDP having a three-electrode structure. FIG. 24 shows an exploded perspective view of the structure of a conventional surface discharge PDP having a three-electrode structure. Figure 2
No. 4, as shown in FIG. 4, having display electrode pairs that are parallel and adjacent to each other on one substrate, and have address electrodes 23 extending in a direction intersecting with the display electrodes, partition walls 16 and phosphor layers 17 on the other substrate. Therefore, it can be said that the phosphor layer can be made relatively thick, which is suitable for color display by the phosphor. The display electrode pair is composed of a scan electrode (scan electrode) 21 and a sustain electrode (sustain electrode) 22.

A conventional panel driving method is to divide one field period into a plurality of subfields having a weight of a light emitting period based on a binary system, and perform gradation display by a combination of subfields to emit light. 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 in the initialization period, the address period, and the sustain period. In the reset period, a reset 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 alternately applied between the scan electrode 21 and the sustain electrode 22 by applying a periodic sustain pulse which is alternately inverted between the scan electrode 21 and the sustain electrode 22. Perform and display.

However, the conventional plasma display device still has problems of low luminous efficiency and low brightness. For example, the luminous efficiency is 1 lm / W, which is about 1/5 of that of a CRT.

Various investigations have been made on the above problems, but there is no example in which a PDP using a positive column has been put to practical use in order to increase the luminous efficiency of ultraviolet rays. This is because the size of the cell of the PDP is limited with respect to the interelectrode distance required for the positive column, and the discharge is not stable and it is difficult to control the discharge simply by increasing the interelectrode distance. It is thought to be done.

Patents include, for example, JP-A-5-41165, JP-A-5-41164, and JP-A-6-275202. Sufficient results can be obtained even if the above patent information is adopted. Has not been done.

[0007]

As described above, the conventional plasma display device has a problem that the luminous efficiency is significantly lower than that of a display device such as a CRT. Generally, a positive column can be generated by increasing the distance between the electrodes that cause discharge, but in the cell structure of the PDP, simply increasing the distance between the electrodes does not stabilize the positive column, the discharge flickers, and the luminous efficiency is also increased. It won't be that big.

An object of the present invention is to solve the above problems, that is, to provide a driving method of a plasma display panel which can stably use a positive column and realize high brightness 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 is a method for driving a plasma display panel having at least three types of electrodes, a first electrode 1, a second electrode 2 and a third electrode 3. A process of producing 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, and the first electrode 1 and the second electrode 2. electrode
A step of causing a discharge current Imain to flow between the two to emit light, a step of generating a counter electromotive force Vemf-main that suppresses fluctuations of the discharge current on the first electrode 1 side and / or the second electrode 2 side, 3 electrodes
There is a process of flowing a discharge current Isub between the third electrode 3 and the second electrode 2 and / or between the first electrode 1 and the third electrode 3.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is 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)
And a third electrode (3) or / and a step of causing a potential difference between the third electrode (3) and the second electrode (2), and the first
A process of causing a first discharge current (Imain) to flow between the electrode (1) and the second electrode (2) to emit light, and to the first electrode (1) side and / or the second electrode (2) side A process of generating a first counter electromotive force (Vemf-main) for suppressing the fluctuation of the first discharge current,
Between the third electrode (3) and the second electrode (2) or / and the first electrode
Second discharge current (Isub) between the first electrode (1) and the third electrode (3)
It is a method of driving a plasma display panel, which comprises a step of flowing a liquid crystal.

By such a driving method, the back electromotive force Vemf
It is possible to suppress the fluctuation of the discharge current Imain with -main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. In addition, the counter electromotive force is generated by flowing the discharge current Isub.
The decrease in 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 the plasma display panel having at least a first electrode (1), a second electrode (2) and a third electrode (3), wherein the first electrode ( 1) and the second electrode (2), as well as the first electrode (1) and the third
Between electrodes (3) or / and said third electrode (3) and said second electrode
(2) the process of causing a potential difference between the first electrode (1)
Or / and a step of generating a second counter electromotive force (Vemf-C) in the second electrode (2), which suppresses a variation in the charging / discharging current of the panel flowing when the potential difference is generated; Electrode (1)
The first discharge current (Imain) between the second electrode (2) and the second electrode (2) to emit light, and the first electrode (1) side and / or the second electrode (2) side, The step of generating a first counter electromotive force (Vemf-main) that suppresses the fluctuation of the discharge current of No. 1, and between the third electrode (3) and the second electrode (2) and / or the first electrode A method of driving a plasma display panel, comprising a step of flowing a second discharge current (Isub) between (1) and the third electrode (3).

By such a driving method, the reduction of the charging / discharging current of the panel can be suppressed by the counter electromotive force Vemf-C immediately before the discharging, and the voltage applied to the discharging space can be substantially strengthened. Further, it is possible to suppress the fluctuation of the discharge current Imain by the counter electromotive force Vemf-main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover,
The positive column discharge formed in this way is very efficient,
A strong emission intensity can be obtained. Also, the discharge current Isub
By flowing the current, it is possible to compensate for the decrease in the discharge current Imain (the decrease in the wall charge) suppressed by the back electromotive force Vemf-main, and it is possible to generate the positive column discharge in the next cycle at a low voltage. Becomes

The invention according to 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 electrodes (3) or / and said third electrode (3) and said second electrode
(2) the process of causing a potential difference between the first electrode (1)
A first discharge current (Imain) between the first electrode (1) side and / or the second electrode (2) to emit light;
A step of generating a first counter electromotive force (Vemf-main) for suppressing the fluctuation of the first discharge current on the side of the two electrodes (2);
Between the electrode (3) and the second electrode (2) or / and the first electrode
The process of flowing the second discharge current (Isub) between the (1) and the third electrode (3) and the third counter electromotive force (Vemf) that suppresses the fluctuation of the discharge current on the side of the third electrode (3). is a method of driving a plasma display panel including a process of generating (-sub).

By such a driving method, the back electromotive force Vemf
It is possible to suppress the fluctuation of the discharge current Imain with -main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. In addition, the counter electromotive force is generated by flowing the discharge current Isub.
The decrease in 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 counter electromotive force Vemf-sub can suppress the discharge current Isub flowing through the third electrode 3 to a necessary minimum. Thereby, 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 fourth aspect of the present invention, in the 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), as well as the first electrode (1) and the third
Between electrodes (3) or / and said third electrode (3) and said second electrode
(2) the process of causing a potential difference between the first electrode (1)
Or / and a step of generating a second counter electromotive force (Vemf-C) in the second electrode (2), which suppresses a variation in the charging / discharging current of the panel flowing when the potential difference is generated; Electrode (1)
The first discharge current (Imain) between the second electrode (2) and the second electrode (2) to emit light, and the first electrode (1) side and / or the second electrode (2) side, The step of generating a first counter electromotive force (Vemf-main) that suppresses the fluctuation of the discharge current of No. 1, and between the third electrode (3) and the second electrode (2) and / or the first electrode The process of flowing the second discharge current (Isub) between the (1) and the third electrode (3) and the third counter electromotive force (Vemf) that suppresses the fluctuation of the discharge current on the side of the third electrode (3). is a method of driving a plasma display panel including a process of generating (-sub).

By such a driving method, it is possible to suppress the decrease of the charging / discharging current of the panel by the counter electromotive force Vemf-C immediately before the discharging, and substantially increase the voltage applied to the discharging space. Further, it is possible to suppress the fluctuation of the discharge current Imain by the counter electromotive force Vemf-main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover,
The positive column discharge formed in this way is very efficient,
A strong emission intensity can be obtained. Also, the discharge current Isub
By flowing the current, it is possible to compensate for the decrease in the discharge current Imain (the decrease in the wall charge) suppressed by the back electromotive force Vemf-main, and it is possible to generate the positive column discharge in the next cycle at a low voltage. Becomes Furthermore, the counter electromotive force Vemf-sub causes a third
The discharge current Isub flowing through the electrode 3 can be suppressed to the necessary minimum. Thereby, 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 counter electromotive force (Vemf-m).
ain) reduces by 10% or more.
5. The method for driving a plasma display panel according to any one of items 4 to 4.

By such a driving method, the back electromotive force Vemf
It is possible to suppress the fluctuation of the discharge current Imain with -main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. 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 great. In addition, by flowing the discharge current Isub, the discharge current Imain suppressed by the counter electromotive force Vemf-main
Can be compensated for (the decrease in wall charge), and the positive column discharge in the next cycle can be generated at a low voltage.

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

By such a driving method, the back electromotive force Vemf
It is possible to suppress the fluctuation of the discharge current Imain with -main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. In addition, the counter electromotive force is generated by flowing the discharge current Isub.
The decrease in 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 great.

The invention according to claim 7 of the present invention is characterized in that 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.

By such a driving method, the back electromotive force Vemf
It is possible to suppress the fluctuation of the discharge current Imain with -main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. In addition, the counter electromotive force is generated by flowing the discharge current Isub.
The decrease in 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 great.

According to the eighth aspect of the present invention, in the process of producing 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 claims 1 to 7, wherein:

By such a driving method, the back electromotive force Vemf
It is possible to suppress the fluctuation of the discharge current Imain with -main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. In addition, the counter electromotive force is generated by flowing the discharge current Isub.
The decrease in 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 producing a potential difference between the electrode 1 and the second electrode 2, by changing the potential change rate to 1.0 V / ns or more,
The sustain voltage can be lowered, and the luminous efficiency can be significantly increased.

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

By such a driving method, the back electromotive force Vemf
It is possible to suppress the fluctuation of the discharge current Imain with -main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. In addition, the counter electromotive force is generated by flowing the discharge current Isub.
The decrease in 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, by changing the counter electromotive force Vemf-main according to the display amount, the light emission efficiency can be optimized according to the display amount.

The invention according to claim 10 of the present invention is a plasma display device for driving a plasma display panel by the method for driving a plasma display panel according to any one of claims 1 to 9.

With such a display device, it is possible to suppress the fluctuation of the discharge current Imain by the counter electromotive force Vemf-main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. Also, by passing 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. Furthermore, by changing the counter electromotive force Vemf-main according to the display amount, the light emission efficiency can be optimized according to the display amount.

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

With such a display device, it becomes possible to clearly generate a positive column. Further, it is possible to suppress the fluctuation of the discharge current Imain by the counter electromotive force Vemf-main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. Also, by flowing the discharge current Isub, it is possible to compensate for the decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main, and the positive column discharge in the next cycle can be performed at a low voltage. It is possible to generate.

The invention according to claim 12 of the present invention is the first
The electrode (1) and the second electrode (2) are formed on the first substrate (11),
The distance between one substrate (11) and the opposing second substrate (12) is 0.15mm
The plasma display device according to claim 10 or 11, characterized by the above.

With such a display device, it is possible to secure a sufficient discharge space, and it is possible to generate a positive column strongly and stably. Also, the back electromotive force Vemf
It is possible to suppress the fluctuation of the discharge current Imain with -main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. In addition, the counter electromotive force is generated by flowing the discharge current Isub.
The decrease in 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 13 of the present invention is characterized in that a plurality of third electrodes (3) are formed in one display cell which is the minimum display unit of the plasma display panel. Item 13. A plasma display device according to any one of items 10 to 12.

With such a display device, a positive column is spread over a plurality of third electrodes (a plurality of positive columns are formed in some cases), and it becomes possible to increase the emission intensity and emission efficiency. Further, it is possible to suppress the fluctuation of the discharge current Imain by the counter electromotive force Vemf-main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. Also, by flowing the discharge current Isub, it is possible to compensate for the decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main, and the positive column discharge in the next cycle can be performed at a low voltage. It is possible to generate.

According to a fourteenth aspect of the present invention, in which a plurality of third electrodes (3) are formed in one display cell which is a minimum display unit of the plasma display panel, a protrusion is provided.
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 it becomes possible to further enhance the emission intensity and emission efficiency. Further, it is possible to suppress the fluctuation of the discharge current Imain by the counter electromotive force Vemf-main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. Also, by flowing the discharge current Isub, it is possible to compensate for the decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main, and the positive column discharge in the next cycle can be performed at a low voltage. It is possible to generate.

The invention according to claim 15 of the present invention is the first aspect.
The electrode (1) and the second electrode (2) are formed on the first substrate (11), and the third electrode (3) is the first electrode (1) and the second electrode via a dielectric.
15. The plasma display device according to claim 10, wherein the first substrate (11) is formed so as to intersect with (2).

With such a display device, it is possible to suppress the fluctuation of the discharge current Imain with the counter electromotive force Vemf-main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. Also, by passing 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 are arranged so that the third electrode 3 intersects with the first electrode 1 and the second electrode 2 through the 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 start voltage,
There are no restrictions on using the third electrode as a cathode.

The invention according to claim 16 of the present invention is the first aspect.
The electrode (1) and the second electrode (2) are formed on the first substrate (11), so that the third electrode (3) intersects the first electrode (1) and the second electrode (2), 15. The plasma display device according to claim 10, wherein the plasma display device is formed on a second substrate (12) facing the first substrate (11).

With such a display device, it is possible to suppress the fluctuation of the discharge current Imain with the counter electromotive force Vemf-main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. Also, by passing 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 third electrode 3 is opposed to the first substrate 11 so as to intersect the first electrode 1 and the second electrode 2. By being formed on the second substrate 12 that is formed, light emission by counter discharge can be obtained in addition to surface discharge, and higher emission intensity can be obtained.

The invention according to claim 17 of the present invention is the first
The 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 on the first substrate (11). Claims 10 to 16
The plasma display device according to any one of 1.

With such a display device, it is possible to suppress the fluctuation of the discharge current Imain by the counter electromotive force Vemf-main, to stably form the positive column discharge, and to suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. Also, by passing 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.

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

The present invention will be specifically described with reference to the following embodiments, but the embodiments of the present invention are not limited to these.

[0048] Note that the first substrate, a second substrate, the first having a substrate and a discharge space formed by the second substrate, a plurality of scan electrodes and sustain electrodes on the inner surface of the first substrate to each other A driving method for a plasma display panel in which address electrodes are arranged in parallel and alternately on the inner surface of the second substrate and are perpendicular to the scan electrodes, and applied to the scan electrodes and / or the sustain electrodes. the sustain pulse of the waveform, yet good as a driving method of a plasma display panel and providing a protrusion and / or recess.

With such a driving method, the amount of surface discharge current is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

Also , a first substrate, a second substrate, a discharge space formed by the first and second substrates, and a plurality of scan electrodes and sustain electrodes are formed on the inner surface of the first substrate. A driving method for a plasma display panel, wherein the scan electrodes are arranged in parallel and alternately, and address electrodes are arranged vertically on the inner surface of the second substrate, the address electrodes being arranged between the scan electrodes and the sustain electrodes. the potential difference between the waveform, it may be a method of driving a plasma display panel, characterized in that providing the projections and / or depressions.

By such a driving method, the amount of surface discharge current is decreased, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

The invention according to claim 18 of the present invention is the first aspect.
A substrate, a second substrate, and a discharge space formed by the first and second substrates, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on the inner surface of the first substrate. A driving method for a plasma display panel in which address electrodes are arranged vertically to the scan electrodes on an 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, which is characterized in that a voltage sufficient to start discharge is applied, the voltage drops with an increase in discharge current after the start of discharge, and the voltage is maintained so that discharge does not start again after the end of discharge. Is.

With such a driving method, the amount of surface discharge current is decreased, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

The invention according to claim 19 of the present invention is the first
A substrate, a second substrate, and a discharge space formed by the first and second substrates, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on the inner surface of the first substrate. A driving method for a plasma display panel in which address electrodes are arranged vertically 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 a discharge start. A method of driving a plasma display panel, which is characterized in that a sufficient voltage is applied to the voltage drop, the voltage drops with the increase of the discharge current after the start of discharge, and the voltage is maintained so that the discharge does not start again after the end of discharge. .

By such a driving method, the amount of surface discharge current is decreased, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

[0056] Note that the first substrate, a second substrate, the first having a substrate and a discharge space formed by the second substrate, a plurality of scan electrodes and sustain electrodes on the inner surface of the first substrate to each other A driving method for a plasma display panel in which address electrodes are arranged in parallel and alternately on the inner surface of the second substrate and are perpendicular to the scan electrodes, and applied to the scan electrodes and / or the sustain electrodes. The sustain pulse waveform may be in the shape of an overshoot, as a driving method of the plasma display panel.

By such a driving method, the surface discharge current amount is decreased, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

In addition , a first substrate, a second substrate, and a discharge space formed by the first and second substrates are provided, and a plurality of scan electrodes and sustain electrodes are formed on the inner surface of the first substrate. A driving method for a plasma display panel, wherein the scan electrodes are arranged in parallel and alternately, and address electrodes are arranged vertically on the inner surface of the second substrate, the address electrodes being arranged between the scan electrodes and the sustain electrodes. The driving method of the plasma display panel may be characterized in that the waveform of the potential difference has an overshoot shape.

By such a driving method, the amount of surface discharge current is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

In addition , the waveform of the sustain pulse applied to the scan electrode and / or the sustain electrode has a protrusion and / or
Alternatively, there is also a method characterized in that the peak value of the discharge current flowing between the scan electrode and the sustain electrode is reduced by 10% or more by providing the depressed portion.

By such a driving method, the surface discharge current amount is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

Alternatively , the peak value of the discharge current flowing between the scan electrode and the sustain electrode is 10% by providing the protrusion and / or the depression in the waveform of the potential difference between the scan electrode and the sustain electrode. There is also a method characterized by the above reduction.

By such a driving method, the surface discharge current amount decreases, the voltage drop of the positive column increases, and the brightness increases. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

According to a twentieth aspect of the present invention, since the waveform of the sustain pulse applied to the scan electrode and / or the sustain electrode is a waveform in which the voltage drops with the increase of the discharge current after the start of the discharge, 19. The method of driving a plasma display panel according to claim 18 , 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 is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

According to the twenty-first aspect 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, 20. The method as claimed in claim 19, wherein the peak value of the discharge current flowing between the sustain electrode and the sustain electrode is reduced by 10% or more.

By such a driving method, the surface discharge current amount is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

Since the waveform of the sustain pulse applied to the scan electrode and / or the sustain electrode has an overshoot shape, the peak value of the discharge current flowing between the scan electrode and the sustain electrode is 10%.
It may be characterized by reduced or more.

By such a driving method, the surface discharge current amount is decreased, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

Alternatively , 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 decreases by 10% or more. it may also be characterized by.

By such a driving method, the surface discharge current amount is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

The invention according to claim 22 of the present invention is the first aspect.
A substrate, a second substrate, and a discharge space formed by the first and second substrates, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on the inner surface of the first substrate. , A sustain electrode and a scan are performed on a plasma display panel in which address electrodes are arranged vertically on the inner surface of the second substrate.
A part of the surface discharge current flowing between the electrode and
Opposition that flows between the pole or scan electrode and the address electrode
It is a method of driving a plasma display panel, which is characterized by flowing as a discharge current .

By such a driving method, positive column discharge can be stably formed, and flicker of discharge can be suppressed. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained.

The invention according to claim 23 of the present invention is characterized in that the discharge current value of the counter discharge is 10% or more of the sum of the discharge current value of the surface discharge and the discharge current value of the counter discharge. Item 23. A method for driving a plasma display panel according to item 22 .

By such a driving method, positive column discharge can be stably formed, and flicker of discharge can be suppressed. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained.

The invention described in claim 24 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 23 .

With such a plasma display device, a positive column discharge can be stably formed, and the flicker of the discharge can be suppressed. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained.

The invention according to claim 25 of the present invention is the first aspect.
A substrate, a second substrate, and a discharge space formed by the first and second substrates, and a plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on the inner surface of the first substrate. , At least a discharge current flows to the plasma display panel in which the address electrodes are arranged vertically to the scan electrodes on the inner surface of the second substrate.
In the plasma display device, an inductance is connected in series to the scan electrode and / or the sustain electrode during a certain period .

With such a plasma display device, a positive column discharge can be stably formed, and the flicker of the discharge can be suppressed. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained.

According to the twenty-sixth aspect of the present invention, since the inductance is connected in series to the scan electrode and / or the sustain electrode, the peak value of the discharge current flowing between the scan electrode and the sustain electrode is obtained. 26. The plasma display device according to claim 25 , characterized in that it decreases by 10% or more.

With such a plasma display device, a positive column discharge can be stably formed, and the flicker of the discharge can be suppressed. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained.

The twenty-seventh aspect of the present invention is the method of driving a plasma display panel according to any one of the eighteenth to twenty- third aspects, characterized in that the address electrodes are connected to a predetermined potential.

By such a driving method, the surface discharge current amount is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

The invention according to claim 28 of the present invention is the plasma display device according to any one of claims 24 to 26 , characterized in that the address electrodes are connected to a predetermined potential.

With such a plasma display device, the amount of surface discharge current is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

[0086] The invention according to claim 29 of the present invention, claim 18 of <br/> stone 23 periods potentials of the scan electrodes of the sustain electrodes have the same potential is equal to or less than 500ns 27. The method for driving a plasma display panel according to any one of 27 or 27 .

By such a driving method, the amount of surface discharge current is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

[0088] The invention according to claim 30 of the present invention, claim 24 of <br/> stone 26 periods potentials of the scan electrodes of the sustain electrodes have the same potential is equal to or less than 500ns 28. The plasma display device according to 28 .

With such a plasma display device, the amount of surface discharge current is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

According to a thirty-first aspect of the present invention, the absolute value of the displacement speed of the voltage applied in the discharge space is 1.0 V / ns.
The method for driving a plasma display panel according to any one of claims 18 to 23 and 27 or 29, which is the above.

By such a driving method, the amount of surface discharge current is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

According to a thirty-second aspect of the present invention, the absolute value of the displacement rate of the voltage applied in the discharge space is 1.0 V / ns.
The preceding claims 24, characterized in that at least 26 one of a plasma display device 28 or 30, wherein.

With such a plasma display device, the amount of surface discharge current is reduced, the voltage drop of the positive column is increased, and the brightness is increased. Further, since the brightness due to the opposed discharge is also increased, it has the effect of improving the light emission efficiency.

The invention according to claim 33 of the present invention is the first aspect.
Substrate and any one of claims 24 to 26 the distance between the second substrate and wherein the at 0.15mm or more, 28, 30 also <br/> is a plasma display apparatus 32 according.

With such a plasma display device, a positive column discharge can be stably formed, and the flicker of the discharge can be suppressed. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained.

[0096] The invention according to claim 34 of the present invention, the plasma display panel readability one display cell which is a unit of, to 24 claims, characterized in that the address electrodes are a plurality of formed 26 28 ,
30 , 32, or 33 .

With such a plasma display device, a positive column discharge can be stably formed, and the flicker of the discharge can be suppressed. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained.

According to a thirty-fifth aspect of the present invention, the protrusion is formed between a plurality of address electrodes formed in one display cell which is the minimum display unit of the plasma display panel. 35. The plasma display device according to claim 34 .

With such a plasma display device, a positive column discharge can be stably formed, and the flicker of the discharge can be suppressed. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained.

[0100] The invention according to claim 36 of the present invention,
It any one of claims 24 to 26, characterized in that the float electrode is formed between adjacent display cells on the substrate, a plasma display apparatus according to any one of 28, 30 or 32 to 35.

With such a plasma display device, a positive column discharge can be stably formed, and discharge flicker can be suppressed. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. Here, "process" is always
It does not mean that each process is temporally separated.
That is, there may be temporal overlap in each process.

(Embodiment 1) Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The plasma display panel driving method and the display device using the plasma display panel described in the present embodiment include at least three types of electrodes, a first electrode 1 and a 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
Or / and a step of generating a potential difference between the third electrode 3 and the second electrode 2, a step of causing a discharge current Imain to flow between the first electrode 1 and the second electrode 2 to emit light, and a side of the first electrode 1 side. , Or / and second
Back electromotive force Vemf-ma that suppresses the fluctuation of the discharge current on the electrode 2 side
the process of generating in and between the third electrode 3 and the second electrode 2, or /
And a step of flowing a discharge current Isub between the first electrode 1 and the third electrode 3.

In addition, a process of generating a counter electromotive force Vemf-C that suppresses the fluctuation of the charging / discharging current of the panel that flows when the potential difference is generated is generated on the first electrode 1 side and / or the second electrode 2 side. I have.

The peak value of the discharge current Imain is
The counter electromotive force Vemf-main reduces the amount by 10% or more.

In addition, the discharge current Isub between the third electrode 3 and the second electrode 2 and / or between the first electrode 1 and the third electrode 3 is
10% or more of the discharge current Imain flows between the second electrode 2 and the second electrode 2.

Further, with respect to the third electrode 3, the potentials of the first electrode 1 and the second electrode 2 are changed at the same time.

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

The counter 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 embodiment of the present invention is not limited to this.

[Panel Structure] FIG. 1 is an exploded perspective view of the plasma display panel (PDP) used in the first embodiment. The PDP of FIG. 1 has first electrodes that are substantially parallel to each other on the inner surface of a first substrate 11 that is one of a pair of substrates that sandwich a discharge space.
1, the second electrode 2 and the dielectric layer 13, on the inner surface of the other second substrate 12, the third electrode 3 intersecting the first electrode 1, the second electrode 2, the dielectric layer 15, discharge Partition wall that divides the space into unit light emitting areas EU
It has 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 substrate material is generally soda lime glass, but is not particularly limited. A low melting point glass is generally used as the material of the partition walls, but is not particularly limited. The phosphor is not particularly limited as long as it is excited by ultraviolet rays generated by discharge and emits light. A low melting point glass is generally used as the material of the dielectric, but is not particularly limited. A material having a high secondary electron emission coefficient γ is desirable for the protective film, and MgO is generally used, but the material 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
The voltage waveforms output from the circuit to the second electrode 2 and the third electrode 3 are shown. In FIG. 2, the horizontal axis represents time and the vertical axis represents voltage. 2 (a) shows the voltage waveform of the first electrode 1, and FIG. 2 (b)
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 the voltage value Hi to the voltage value 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, and 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 to Lo
The light is continuously emitted by repeating the period changing to Hi.

By applying these voltages, the first
Charge the panel by causing a potential difference between the electrode 1 and the second electrode 2 and between the first electrode 1 and the third electrode 3 so that the first electrode 1 is positive and the second electrode 2 and the third electrode 3 are negative. is doing. At this time, the potentials of the first electrode 1 and the second electrode 2 were changed simultaneously with respect to the third electrode 3.
Further, a voltage was applied so that the potential changing rate was 1.0 V / ns or more. Furthermore, in order to generate the counter electromotive force Vemf-C that suppresses the fluctuation of the charging current of the panel, the first electrode 1 side of the circuit
An inductance of 100 μH was inserted. Therefore, actually observing the voltage and current waveforms of the first electrode 1, the second electrode 2, and the third electrode 3, it becomes as shown in FIG. In FIG. 3, the horizontal axis represents time and the vertical axis represents voltage and current. 3A shows the voltage and current waveforms of the first electrode 1, FIG. 3B shows the voltage and current waveforms of the second electrode 2, and FIG. 3C shows the voltage and current of the third electrode 3. The waveform is shown. This makes it possible to increase the electric field strength applied between the first electrode 1 and the second electrode 2 immediately before the start of discharge.

Next, when the discharge is started, the discharge current Imain flows between the first electrode 1 and the second electrode 2 to emit light. At this time, in order to generate the counter electromotive force Vemf-main that suppresses the fluctuation of the discharge current, the 100 μH inductance inserted in the first electrode 1 side of the circuit is used as it is. As a result, the discharge current Imain
It can be seen that becomes smaller and has a gentle current waveform. At this time, observing the positive column shows that it is strong and thick and very stable. Further, at the same time when the discharge starts, the discharge current Isub flows between the third electrode 3 and the second electrode 2 to which no voltage is applied. As described above, by causing the discharge current Isub to flow, the discharge current I suppressed by the counter electromotive force Vemf-main
The decrease of main (the decrease of wall charge) can be compensated, and the positive column discharge of the next cycle can be generated at a low voltage. If the counter electromotive force Vemf-C is not generated, the inductance may be inserted immediately before the discharge.

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

Next, the counter electromotive force Vemf due to the inductance is
-First electrode 1, 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.
4 (a) shows the voltage and current waveforms of the first electrode 1, and FIG. 4 (b)
Shows the voltage and current waveforms of the second electrode 2, and FIG. 4 (c) shows the voltage and current waveforms of the third electrode 3. The discharge current Imain decreases by 10% or more due to the back electromotive force Vemf-main of the inductance.

In this case, in the 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 performed. Efficiency 1.28lm / W
Met.

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

At this time, similarly, the counter electromotive force Vemf-main is generated by using the inductance to set Isub to 0 or Imain.
Can be kept below 10%. Also, the back electromotive force Vemf
-main makes it possible to reduce the discharge current Imain by less than 10%. When driven in this way, the positive column discharge is not stable and the luminous efficiency does not increase so much.

Next, a phenomenon in the case of changing the changing rate of the potential in the process of producing the potential difference between the first electrode 1 and the second electrode 2 will be described. Change rate of potential is 0.5V / ns
As a result of investigating from 1 to 2.5 V / ns, it was found that the luminous efficiency greatly changed depending on the change rate of the potential. In particular,
The luminous efficiency becomes very 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, while the potential change rate is 1.8V /
At ns, the luminous efficiency is 2.54 lm / W.

Further, for the inductance, a coil of 100 μH was used in our panel this time, but the optimum size is determined by the capacitance of the panel. That is, the discharge current Imain is 10
The inductance that generates the counter electromotive force Vemf-main that decreases by more than 10% can be selected according to the capacitance of the panel.
Further, if the inductance size is optimized, the luminous efficiency is further improved by using the inductance on both the first electrode 1 side and the second electrode 2 side.

Further, as the means for generating the counter electromotive forces Vemf-main and Vemf-C, the inductance is used in the above example, but it is not particularly limited as long as it can generate the counter electromotive force. For example, as a means for generating the counter electromotive force Vemf-main, a counter electromotive force or a counter pulse that cancels the potential difference between the first electrode 1 and the second electrode 2 can be applied. Further, it is possible to make the waveform of the discharge current Imain gentle by superimposing pulses continuously. Similarly, pulses can be intentionally superposed as a means for generating the counter electromotive force Vemf-C. FIG. 5 shows the waveform of the applied voltage when the counter 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.

Further, in order to force the discharge current Isub to flow, it is possible to apply a pulse to the third electrode 3 at the same time as the start of 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 counter electromotive force is generated by a pulse. Figure 6 (a) shows the first electrode 1
6B shows the voltage waveform of the second electrode 2, and FIG. 6C 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 due to charging of the panel, and for example, discharge of the panel (not gas discharge) may be used.

Strictly speaking, the effect of the present invention in this embodiment is slightly changed by the change in the capacitance depending on the lighting rate of the panel. However, the counter electromotive force Vemf-mai against the displayed amount
By controlling n, the light emission efficiency can be optimized according to the display amount.

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

FIG. 7 is a block diagram showing the structure of the display device according to the present embodiment. The display device of FIG. 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 / digital converter) 151, a scan number conversion unit 152, and a subfield. The converter 153 is included.

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, the plurality of scan electrodes and the plurality of scan electrodes. The sustain electrodes are arranged in the horizontal direction of the screen. In addition, the plurality of sustain electrodes are commonly connected. In addition, discharge cells are formed at the intersections of the address electrodes, scan electrodes, and sustain electrodes, and each discharge cell constitutes a pixel on the screen. By applying a write pulse between the address electrode and the scan electrode to the PDP 100, address discharge is performed between the address electrode and the scan electrode to select a discharge cell, and then between the scan electrode and the sustain electrode. By applying a periodic sustain pulse which is alternately inverted, sustain discharge is performed between the scan electrode and the sustain electrode, and display is performed.

A gradation display driving method in the AC PDP is, 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 of FIG. 8 represents the scanning direction (vertical scanning direction) of the scan electrodes from the first line to the m-th line, and the horizontal axis represents time. In the ADS method, 1 field (1/60 second = 16.67m
s) is temporally divided into multiple subfields. For example, when displaying 256 gradations with 8 bits, one field is divided into eight subfields. In addition, each subfield is divided into an address period in which an address discharge for selecting a lighted cell is performed and a sustain period in which a sustain discharge for display is performed. In the ADS method, scanning is performed by address discharge over the entire surface of the PDP from the first line to the m-th line in each subfield, and sustain discharge is performed at the end of the full-area address discharge.

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

The discharge control timing generating circuit generates discharge control timing signals SC and SU with reference to 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 is the output circuit 131 and the 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 shifts the discharge control timing signal SC given from the discharge control timing generating circuit to the output circuit while shifting it 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 shifts the discharge control timing signal SU given from the discharge control timing generating circuit to the output circuit while shifting it in the vertical scanning direction. The output circuit sequentially drives the plurality of sustain electrodes in response to the discharge control timing signal SU supplied from the shift register.

FIG. 9 is a timing chart showing the drive voltage applied to each electrode of the PDP 100. In FIG. 9, the horizontal axis represents time and the vertical axis represents voltage. In Figure 9,
The drive voltages of the address electrodes, the sustain electrodes, and the scan electrodes of the nth line to the (n + 2) th line are shown.
Here, n is an arbitrary integer. As shown in FIG. 5, the sustain pulse (Psu) is applied to the sustain electrode at a constant period during the light emission period. In the address period, the write pulse (Pw) is applied to the scan electrode. 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 applied at the same time, the address discharge is generated in the 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, the 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 180 degrees out of phase with the phase of the sustain pulse (Psc) applied to the sustain electrode. In this case, the sustain discharge is generated only in the discharge cells that are turned on by the address discharge. At the end of each subfield, an erase pulse (Pe) is applied to the scan electrodes. As a result, the wall charge of each discharge cell is reduced to such an extent that the discharge or the sustain discharge does not occur, and the sustain discharge ends. During the rest period after the application of the erase pulse (Pe), the rest pulse (Pr) is applied to the scan electrode at a constant cycle. The rest pulse (Pr) has the same phase as the sustain pulse (Psu).

The details of the driving method of 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.

The driving method of the plasma display panel described in the present embodiment and the display device using the same include 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
Or / and a step of generating a potential difference between the third electrode 3 and the second electrode 2, a step of causing a discharge current Imain to flow between the first electrode 1 and the second electrode 2 to emit light, and a side of the first electrode 1 side. , Or / and second
Back electromotive force Vemf-ma that suppresses the fluctuation of the discharge current on the electrode 2 side
the process of generating in and between the third electrode 3 and the second electrode 2, or /
And the process of flowing the discharge current Isub between the first electrode 1 and the third electrode 3, and the counter electromotive force Ve that suppresses the fluctuation of the discharge current on the side of the third electrode 3.
It has a process of generating mf-sub.

In addition, the process of generating the counter electromotive force Vemf-C that suppresses the fluctuation of the charging / discharging current of the panel that flows when the potential difference is generated is generated on the first electrode 1 side and / or the second electrode 2 side. I have.

In addition, the peak value of the discharge current Imain is
The counter electromotive force Vemf-main reduces the amount by 10% or more.

In addition, the discharge current Isub between the third electrode 3 and the second electrode 2 and / or between the first electrode 1 and the third electrode 3 is
10% or more of the discharge current Imain flows between the second electrode 2 and the second electrode 2.

Further, the electric potentials of the first electrode 1 and the second electrode 2 are changed at the same time with respect to the third electrode 3.

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

The counter 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 embodiment of the present invention is not limited to this.

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

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

By applying these voltages, the first
Charge the panel by causing a potential difference between the electrode 1 and the second electrode 2 and between the first electrode 1 and the third electrode 3 so that the first electrode 1 is positive and the second electrode 2 and the third electrode 3 are negative. is doing. At this time, the potentials of the first electrode 1 and the second electrode 2 were changed simultaneously with respect to the third electrode 3.
Further, a voltage was applied so that the potential changing rate was 1.0 V / ns or more. Furthermore, in order to generate the counter electromotive force Vemf-C that suppresses the fluctuation of the charging current of the panel, the first electrode 1 side of the circuit
An inductance of 100 μH was inserted. Therefore, actually observing the voltage and current waveforms of the first electrode 1, the second electrode 2, and the third electrode 3, it becomes as shown in FIG. This makes it possible to increase the electric field strength applied between the first electrode 1 and the second electrode 2 immediately before the start of discharge.

Next, when the discharge is started, the discharge current Imain flows between the first electrode 1 and the second electrode 2 to emit light. At this time, in order to generate the counter electromotive force Vemf-main that suppresses the fluctuation of the discharge current, the 100 μH inductance inserted in the first electrode 1 side of the circuit is used as it is. As a result, the discharge current Imain
It can be seen that becomes smaller and has a gentle current waveform. At this time, observing the positive column shows that it is strong and thick and very stable. Further, at the same time when the discharge starts, the discharge current Isub flows between the third electrode 3 and the second electrode 2 to which no voltage is applied. As described above, by causing the discharge current Isub to flow, the discharge current I suppressed by the counter electromotive force Vemf-main
The decrease of main (the decrease of wall charge) can be compensated, and the positive column discharge of the next cycle can be generated at a low voltage. At this time, back electromotive force that suppresses fluctuations in discharge current
To generate Vemf-sub, 100 on the 3rd electrode 3 side of the circuit.
An inductance of μH was inserted. This allows the third electrode
The discharge current Isub flowing in 3 can be suppressed to the necessary minimum. If the counter electromotive force Vemf-C is not generated, the inductance may be inserted immediately before the discharge.

By driving in this way, the first
The electrode 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 sustaining voltage of 245 V and a luminous efficiency of about 2.6 lm / W could be obtained. Moreover, deterioration of the phosphor layer formed on the third electrode 3 could be suppressed.

The counter electromotive force Vemf due to the inductance is also
-In the phenomenon when main is not generated, when changing the size of the inductance or when the driving voltage is increased, or in the process of causing a potential difference between the first electrode 1 and the second electrode 2, Phenomena when changing the rate of change of potential, means to generate counter electromotive force Vemf-main, Vemf-C, means to force discharge current Isub, counter electromotive force to display amount The means for controlling Vemf-main and the like are the same as those in the first embodiment.

[Display Device] The display device is the same as that in the first embodiment. The details of the driving method in the sustain period are as described in the above [driving method].

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

The plasma display device described in the present embodiment is different from the plasma display panel having at least three kinds of electrodes, the first electrode 1, the second electrode 2 and the third electrode 3 in comparison with the first electrode 1 and the second electrode 3. 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
Back electromotive force Vemf that suppresses the fluctuation of the discharge current on the process of flowing n to emit light and on the first electrode 1 side and / or the second electrode 2 side
It has a process of generating -main and a process of flowing a discharge current Isub between the third electrode 3 and the second electrode 2 and / or between the first electrode 1 and the third electrode 3.

Also, 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 are the first
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 third electrodes 3 are formed in one display cell (minimum display unit).

In addition, it is characterized in that a protrusion is formed between a plurality of third electrodes 3 formed in one display cell (minimum display unit).

In addition, the first electrode 1 and the second electrode 2 are the first
The first substrate 1 is formed on the substrate 11 so that the third electrode 3 intersects with the first electrode 1 and the second electrode 2 via a dielectric.
1 is formed.

In addition, the first electrode 1 and the second electrode 2 are the first
It is formed on the substrate 11, and the third electrode 3 is formed on the second substrate 12 facing the first substrate 11 so that the third electrode 3 intersects the first electrode 1 and the second electrode 2. To do.

Further, the first electrode 1 and the second electrode 2 are the first
It is characterized in that a float electrode is formed on the substrate 11 and between adjacent display cells (minimum display unit) on the first substrate 11.

Hereinafter, the present embodiment will be described with reference to specific examples, but the embodiment of the present invention is not limited to this.

The [driving method] is the same as in the first embodiment. The [display device] is basically the same as that of the first embodiment, but the panel structure is different. Only different parts will be described below.

[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 has first electrodes that are substantially parallel to each other on the inner surface of one first substrate 11 in a pair of substrates that sandwich a discharge space.
1, a second electrode, on the inner surface of the other second substrate 12, a third electrode 3 that intersects the first electrode 1 and the second electrode 2, and a partition that divides the discharge space into unit emission regions EU. It has 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 according to the present embodiment is applied to the panel shown in FIG. 1, the distance between the first electrode 1 and the second electrode 2 is 0.5 mm, and the second substrate facing the first substrate 11 is The distance between the substrates 12
With a 0.12 mm panel, a sustaining voltage of 245 V and a luminous efficiency of 2.54 lm / W could be obtained. This is the result shown in the first embodiment.

For the panel of this structure, the first substrate 11
Then, the same driving was performed by 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 high at 0.15 mm or more. For example,
When the distance between one substrate 11 and the opposing second substrate 12 was 0.18 mm, a sustain 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 according to the present embodiment is applied to the panel shown in FIG. 10, the inter-electrode distance between the first electrode 1 and the second electrode 2 is 0.5 mm, and the second substrate facing the first substrate 11 is used. A panel with a distance between the substrates 12 of 0.12 mm, a sustain voltage of 245 V, and a luminous efficiency of 2.94 lm / W
I was able to get

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 8 mm panel, a sustaining voltage of 250 V and a luminous efficiency of 3.14 lm / W could be obtained. It should be noted that the luminous efficiency can be further increased by further increasing the number of the third electrodes 3.

In the PDP shown in FIG. 11, a protrusion 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 shown in FIG. 11, the distance between the first electrode 1 and the second electrode 2 is 0.5 mm, and the second substrate facing the first substrate 11 is With a panel in which the distance between the substrates 12 was 0.18 mm and the height of the protrusions 18 was 0.12 mm, a sustaining voltage of 250 V and a luminous efficiency of 3.40 lm / W could be obtained.

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

By performing the driving method according to the present embodiment on the panel of FIG. 12, crosstalk and flicker of discharge can be suppressed. Furthermore, the float electrode
4, adjacent display cells on the first substrate 11 (minimum display unit)
By forming a plurality of gaps and connecting them, the flicker of the discharge could be further suppressed.

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

By performing the driving method according to the present embodiment on the panel shown in FIG. 13, the sustain voltage can be lowered by about 10V. Further, it was found that it is possible to use the third electrode as the cathode.

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

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

In the PDP shown in FIG. 15, the first electrode 1 and the second electrode 2 are formed on the first substrate 11, and the third electrode 3 crosses the first electrode 1 and the second electrode 2 through the dielectric. It is 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 performing the driving method according to the present embodiment on the panel shown in FIG. 15, the sustain voltage can be lowered and the luminous efficiency can be further increased.

(Embodiment 4) The outline of the structure of the PDP in the fourth embodiment of the present invention is the same as that of FIG. 1 shown as the prior art. A block diagram of a PDP device using the PDP of the present invention is shown in FIG. 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
Reference numeral 05 denotes a subfield processing unit, 106 denotes a memory unit, 10
7 is an A / D converter (analog / digital converter), 108 is a sync signal separation processing unit, and 109 is a video signal.

The video signal 109 is the A / D converter 1
At 07, the analog signal is converted into a digital signal, video data for one field is stored in the memory section 106, and the subfield processing section 105 separates the video data into video data adapted to a plurality of subfields, and the address field driver 7 is driven. It is output as data for each horizontal line. Also,
The discharge control timing generation circuit unit 104 outputs a discharge control timing signal based on the number of subfields and horizontal and vertical synchronization signals to the sustain electrode driver 103, the scan electrode driver 102, and the 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 given from the synchronizing signal separation processing unit 108 to the A / D converter 107, the memory unit 106, the subfield processing unit 105 and the discharge control timing generating circuit unit 104.

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

The subfield processing unit 105 converts the 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 directly processed for each subfield. However, when the number of subfields is 12, there are a plurality of subfields for 1 bit in the upper bits. Become.
Further, the sub-fields are selected so that the display-emitting sub-fields are temporally continuous. In this way, each pixel data for each selected sub-field is output to the address electrode driver 101 as data for each horizontal line. Further, the information on the number of subfields is output to the discharge control timing generation circuit section 104.

The discharge control timing generation circuit section 104
A discharge control timing signal is generated based on the horizontal sync signal and the vertical sync signal from the sync signal separation processing unit 108 and the information of the number of subfields from the subfield processing unit 105, and the scan electrode driver 102 and the sustain electrode are generated respectively. 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 erase 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.
Will be configured to include. 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. Discharge cells are formed at the intersections of the address electrodes 7, the scan electrodes 2 and the sustain electrodes 3, and the discharge cells of three colors of R, G and B are 1
It constitutes a pixel.

Also, the address electrode driver 101 is
The address driver 200 is used. This address driver 200 includes a subfield processing unit 105 shown in FIG.
A plurality of address drivers 2 based on the parallel data for each horizontal line given for each subfield from
Drive 00. In the sustain period and the erase period, the sustain pulse Psus and the 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 supplied from the discharge control timing generation circuit section 104 of FIG. 16 in the vertical scan direction. In the initialization period, the setup pulse Pset is output to the plurality of scan electrodes 2 all at once. Further, in the sustain period, the 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 comprises 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 projection and the depression are provided in the pulse waveform applied to the sustain electrode.

A plurality of sustain electrodes 3 are simultaneously driven by the discharge control timing signal supplied from the discharge control timing generation circuit section 104 of FIG. 16 to each driver.

The basic technical idea of the present invention is that in a three-electrode surface discharge type ACPDP, when the electrode interval between the sustain electrode and the scan electrode of the front glass substrate is widened and the discharge state is changed from the negative glow to the positive column. , Stabilizes the discharge state and improves the screen brightness and the emission brightness.
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 screen brightness are not improved. Therefore, the driving method of the PDP of the present invention adjusts the discharge current by the voltage drop so that the amount of current is optimum after the start of discharge. In addition, since a high voltage is applied first, it is easy to generate a counter discharge, and the conventional PDP
The discharge current due to the opposed discharge also increases, which is useful for adjusting the optimum current amount for the positive column discharge.

More specifically, the distance between the sustain electrode on the front glass substrate of the PDP and the scan electrode is expanded to 200 μm, and the sustain pulse applied to each electrode during the sustain period is changed to the rest period shown in FIG. When the existing waveform was applied, a discharge mainly caused by the positive column was generated from the negative glow, and the screen brightness and the light emission efficiency were higher than those of the conventional PDP having the inter-electrode distance. 18, the horizontal axis represents 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, (c) is The waveforms of the potential difference between the scan electrode and the sustain electrode are shown respectively. However, in this case, the discharge is stopped when the address electrode is connected to an arbitrary voltage such as GND.

Here, as shown in FIG. 19, the pulse width of the sustain pulse to be applied is half cycle (60 μs cycle).
If c is 30 μsec), the sustain pulse is eliminated from the rest period, and there is no period in which the sustain electrode and the scan electrode have the same potential. Even if it is connected to the electric potential of, the discharge of the positive column does not stop. In FIG. 19, the horizontal axis represents 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, and (c) is The waveforms of the potential difference between the scan electrode and the sustain electrode are shown respectively.

Further, in this case, part of the surface discharge current flows to the address electrode, so that the screen brightness is slightly lowered as compared with the case where the address electrode is not connected to an arbitrary potential. However, the applied voltage was 300 V, which was higher than that of the conventional method, and the luminous efficiency was 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 with ringing, as shown in FIG. 20, and the protrusion 205 and the depression 206 are generated. 20, the horizontal axis represents 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 before coil connection, (c) is the waveform of the pulse applied to the sustain electrode after coil connection, (d) is between the scan electrode and the sustain electrode after coil connection The respective waveforms of the potential difference are shown. As a result, discharge current also flows through the address electrodes on the rear substrate, and counter discharge is generated. The discharge current used for this counter discharge is about 3 which is the sum of the surface discharge current and the counter discharge current.
The amount of movement was 0% or more, the amount of surface discharge current 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). Experiments were performed by changing the inductance of the coil, and at 100 μH or more, the counter discharge current was about 30% or more of the sum of the surface discharge current and the counter discharge current, and the effect was exhibited.

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

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

Further, in the present embodiment, the coil is connected to the sustain electrode in series, but the same effect can be obtained when the coil is connected to the scan electrode and both the sustain electrode and the scan electrode. .

[0200]

As described above, according to the present invention , the counter electromotive force is
Vemf-main can suppress the fluctuation of the discharge current Imain, can stably form the positive column discharge, and can suppress the flicker of the discharge. Moreover, the positive column discharge formed in this way is very efficient and a strong emission intensity can be obtained. Also, by flowing the discharge current Isub, it is possible to compensate for the decrease in the discharge current Imain (the decrease in wall charge) suppressed by the back electromotive force Vemf-main, and the positive column discharge in the next cycle can be performed at a low voltage. It is possible to generate.

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

[0202] As described above, by controlling the positive column discharge, high brightness, high luminous efficiency, when and stable discharge can provide a plasma display panel capable
The advantageous effect is obtained .

[Brief description of drawings]

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

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

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

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

FIG. 5 is a characteristic diagram of a waveform of an applied voltage when a counter 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 the discharge current Isub is forced to flow in the first embodiment.

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

FIG. 8 is a conceptual diagram for explaining the ADS method in 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) according to the third embodiment.

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 the configuration of a PDP device according to the fourth embodiment.

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

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

FIG. 19 is a timing chart of sustain pulses according to the third embodiment.

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

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

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

FIG. 23 is a graph showing the relationship between the sustain pulse applied voltage and screen brightness 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 17 Fluorescent substance 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 section 105 Subfield processing unit 106 Memory unit 107 A / D converter 108 Synchronous 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 Sustain driver common power supply circuit 130 Sustain driver 131 Sustain driver Power circuit 132 sustain driver of the shift register 140 the discharge control timing generating circuit 151 A / D converter 152 scan number converter 153 subfield converting unit 200 address driver 201 sustain driver 202 scan driver 203 erase driver 204 up driver 205 protrusion 206 recess

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI H01J 11/02 G09G 3/28 H (72) Inventor Hiroki Kono 3-10-1 Higashisanda, Tama-ku, Kawasaki-shi, Kanagawa Matsushita Giken (56) References JP 2000-194317 (JP, A) JP 11-143425 (JP, A) JP 9-325735 (JP, A) JP 8-123362 (JP, A) ) JP-A-11-126561 (JP, A) JP-A-11-260268 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G09G 3/28 G09G 3/20 611 G09G 3 / 20 624 G09G 3/20 642

Claims (36)

(57) [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) Between, and between the first electrode (1) and the third electrode (3) or / and the step of causing a potential difference between the third electrode (3) and the second electrode (2), A process of causing a first 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 the second electrode (2) side, a process of generating a first counter electromotive force (Vemf-main) for suppressing the fluctuation of the first discharge current, and the third electrode (3) A method of driving a plasma display panel, comprising a step of flowing a second discharge current (Isub) between the second electrode (2) and / or between the first electrode (1) and the third electrode (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). Between, and between the first electrode (1) and the third electrode (3) or / and the step of causing a potential difference between the third electrode (3) and the second electrode (2), A second counter electromotive force (Vemf-C) is generated in the first electrode (1) and / or the second electrode (2) to suppress the fluctuation of the charging / discharging current of the panel that flows when the potential difference is generated. A step, 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 the first electrode
On the (1) side and / or the second electrode (2) side, a process of generating a first counter electromotive force (Vemf-main) that suppresses the fluctuation of the first discharge current, and the third electrode ( 2) between the first electrode (1) and the third electrode (3) or between the second electrode (3) and / or the second electrode (2)
Driving method of a plasma display panel having a process of flowing a discharge current (Isub) of the above. 3. 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) Between, and between the first electrode (1) and the third electrode (3) or / and the step of causing a potential difference between the third electrode (3) and the second electrode (2), A process of causing a first 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 the second electrode (2) side, a process of generating a first counter electromotive force (Vemf-main) for suppressing the fluctuation of the first discharge current, and the third electrode (3) A step of flowing a second discharge current (Isub) between the second electrode (2) and / or between the first electrode (1) and the third electrode (3), and a third electrode (3) side A method of driving a plasma display panel, further comprising the step of generating a third counter electromotive force (Vemf-sub) for suppressing fluctuations in discharge current. 4. 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) Between, and between the first electrode (1) and the third electrode (3) or / and the step of causing a potential difference between the third electrode (3) and the second electrode (2), A second counter electromotive force (Vemf-C) is generated in the first electrode (1) and / or the second electrode (2) to suppress the fluctuation of the charging / discharging current of the panel that flows when the potential difference is generated. A step, 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 the first electrode
On the (1) side and / or the second electrode (2) side, a process of generating a first counter electromotive force (Vemf-main) that suppresses the fluctuation of the first discharge current, and the third electrode ( 2) between the first electrode (1) and the third electrode (3) or between the second electrode (3) and / or the second electrode (2)
The method for driving a plasma display panel, comprising: the step of flowing the discharge current (Isub) and the step of generating a third counter electromotive force (Vemf-sub) that suppresses the fluctuation of the discharge current on the third electrode (3) side. 5. The peak value of the first discharge current (Imain) is
5. The driving method of the plasma display panel according to claim 1, wherein the first back electromotive force (Vemf-main) reduces by 10% or more. 6. The current value of the second discharge current (Isub) is the first
Discharge current (Imain) and the second discharge current (Isu)
6. The method for driving a plasma display panel according to claim 1, wherein the sum is 10% or more of the sum of the current values of b). 7. The first electrode (1) and the third electrode (3) with respect to the third electrode (3)
7. The method for driving a plasma display panel according to claim 1, wherein the potentials of the two electrodes (2) are changed at the same time. 8. The method according to claim 1, wherein in the process of producing 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. 6. A method for driving a plasma display panel according to any one of 1. 9. The method for driving a plasma display panel according to claim 1, wherein the first counter electromotive force (Vemf-main) is changed according to the 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
11. The plasma display device according to claim 10, which is 0.2 mm or more. 12. The first electrode (1) and the second electrode (2) are connected to the first substrate (1).
(1) and the second substrate (1) facing the first substrate (11).
The plasma display device according to claim 10 or 11, 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 the plasma display panel.
5. The plasma display device according to any one of 1. 14. A plurality of third display cells formed in one display cell which is the minimum display unit of the plasma display panel.
14. The plasma display device according to claim 10, wherein a protrusion (18) is formed between the electrodes (3). 15. The first electrode (1) and the second electrode (2) are connected to the first substrate (1).
1), the first substrate so that the third electrode (3) intersects the first electrode (1) and the second electrode (2) through the dielectric.
15. The plasma display device according to claim 10, wherein the plasma display device is formed in (11). 16. The first electrode (1) and the second electrode (2) are connected to the first substrate (1).
1), a third electrode (3) is formed on the first electrode (1) and the third electrode (3).
15. The plasma display device according to claim 10, wherein the plasma display device is formed on a second substrate (12) facing the first substrate (11) so as to intersect the two electrodes (2). . 17. The first electrode (1) and the second electrode (2) are connected to the first substrate (1).
17. The plasma display device according to claim 10, wherein the float electrode (4) is formed on the first substrate (11) between adjacent display cells on the first substrate (11). . 18. A first substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate.
A method for driving a plasma display panel, wherein 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 to start discharge is applied, the voltage drops with the increase of discharge current after the start of discharge, and the discharge is resumed after the end of discharge. A driving method of a plasma display panel, characterized in that it has a shape of maintaining a voltage that does not start. 19. A first substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate, wherein:
A method for driving a plasma display panel, wherein 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. There, the waveform of the potential difference between the scan electrode and the sustain electrode, a voltage sufficient to start discharge is applied,
A driving method for a plasma display panel, which has a shape in which a voltage drops with an increase in a discharge current after the start of discharge and maintains a voltage at which the discharge does not start again after the end of discharge. 20. Since the waveform of the sustain pulse applied to the scan electrode and / or the sustain electrode is a waveform in which the voltage drops with the increase of the discharge current after the start of discharge, the sustain pulse flows between the scan electrode and the sustain electrode. 19. The method for driving a plasma display panel according to claim 18 , wherein the peak value of the discharge current is reduced by 10% or more. 21. A discharge current flowing between the scan electrode and the sustain electrode, wherein 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 discharge starts. 20. The method for driving a plasma display panel according to claim 19 , wherein the peak value of the above is reduced by 10% or more. 22. A first substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate,
A plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on the inner surface of the substrate, the plasma display panel in which the address electrodes are arranged vertically to the scan electrodes on the inner surface of the second substrate, Sustain
One of the surface discharge currents flowing between the in electrode and the scan electrode
The parts, sustain electrode or scan electrode and the address electrode
A method of driving a plasma display panel, characterized in that it is supplied as an opposed discharge current flowing between the plasma display panel and the plasma display panel. 23. The driving method of the plasma display panel according to claim 22, wherein the discharge current value of the counter discharge is 10% or more of the sum of the discharge current value of the surface discharge and the discharge current value of the counter discharge. . 24. A plasma display device using the driving method of the plasma display panel according to any one of claims 18 to 23. 25. A first substrate, a second substrate, and a discharge space formed by the first substrate and the second substrate,
A plurality of scan electrodes and sustain electrodes are arranged in parallel and alternately on the inner surface of the substrate, the plasma display panel in which the address electrodes are arranged vertically to the scan electrodes on the inner surface of the second substrate, Less
Both of the scan electrodes or /
And a plasma display device, wherein an inductance is connected in series to the sustain electrode. 26. 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 to the scan electrode and / or the sustain electrode. The plasma display device according to claim 25 . 27. A driving method of a plasma display panel according to any one of claims 18, characterized in that to connect the address electrodes to a predetermined potential 23. 28. The plasma display apparatus according any one of 24 claims, characterized in that to connect the address electrodes to a predetermined potential 26. 29. claims 17 to 23 or or 27 driving method of a plasma display panel according to, characterized in that the period in which the potential of the potential of the sustain electrodes and the scan electrodes have the same potential is less than 500 ns. 30. A period during which the potential of the sustain electrodes and the scan electrodes have the same potential plasma display apparatus of any one or 28, wherein of from 24 claims, characterized in that less than 500 ns 26. 31. any one of claims 18 to 23, wherein the absolute value of the displacement speed of the voltage applied to the discharge space is 1.0 V / ns or more, 27 or 29, wherein the plasma display panel Driving method. 32. any one of the absolute value of the displacement speed of the voltage applied to the discharge space 24 claims, characterized in that at 1.0 V / ns or more 26, 28 or 30 plasma display apparatus as claimed. 33. Any of the first to the distance between the substrate and the second substrate 24 claims, characterized in that at 0.15mm or more 26, 28, 30 or 32 plasma display apparatus as claimed. To 34. A plasma display panel readability one display cell which is a unit of, to 24 claims, characterized in that the address electrodes are a plurality of formed 2
The plasma display device according to any one of 6 , 28 , 30 , 32, or 33 . 35. The plasma display according to claim 34 , wherein a protrusion 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. 36. The float electrode is formed between adjacent display cells on the first substrate.
24 , 26 or 28 , 30 or 32 or
35. The plasma display device according to any one of 35 .