METHOD OF DRIVING PLASMA DISPLAY PANEL

• US 20020008680A1
• Filed: 10/01/1998
• Published: 01/24/2002
• Est. Priority Date: 10/03/1997
• Status: Active Grant

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: HASHIMOTO, TAKASHI, IWATA, AKIHIKO
• Granted Patent: US 6,369,781 B2
• Time in Patent Office: Days
• US Class Current: 345/63
• CPC Class Codes: G09G 3/2942 with special waveforms to increase luminous efficiency
• CPC Class Codes: G09G 3/296 Driving circuits for producing the waveforms applied to the driving electrodes

Abstract

A sustain discharge which is performed a specified number of times to obtain a predetermined luminance includes a first discharge mainly induced by externally-applied voltage and a second discharge mainly induced by wall charges, and an assistant pulse is applied in a direction to increase the second discharge. That allows an improvement in efficiency of an AC-PDP.

Claims

1. A method of driving a plasma display panel which comprises first and second electrodes both covered with dielectric and a third electrode provided in a direction to cross at least one of said first and second electrodes in a cell,

a sustain discharge comprising a first discharge and a second discharge,

said first discharge being mainly induced by externally-applied voltage,

said second discharge being mainly induced by wall charges generated by said first discharge,

said sustain discharge being performed a specified number of times between said first and second electrodes to obtain a predetermined luminance, and

said second discharge in said sustain discharge utilizing charged particles generated by said first discharge.

2. The method of claim 1, wherein

said sustain discharge utilizes a memory effect of said charged particles.

3. The method of claim 1, wherein

a sustain discharge pulse has a pulse width of 1.6 μ

sec or less.

4. The method of claim 1, wherein

an idle period between pulses to obtain said first discharge in said sustain discharge is 0.8 μ

sec or more.

5. The method of claim 1, wherein

a fall of pulse in said sustain discharge is 300 nsec or less.

6. The method of claim 1, wherein

an assistant pulse is applied in a direction to actively utilize said second discharge up to a value at which a polarity of residual wall charges is not reversed at the end of said second discharge.

7. The method of claim 6, wherein

said assistant pulse is generated negatively to a ground potential on a fall of said sustain pulse.

8. The method of claim 6, wherein

said assistant pulse is generated positively to the ground potential on a fall of said sustain pulse.

12. The method of claim 1, wherein

a group of pulses causing a first assistant discharge is applied in a form not to induce said second discharge between an addressing discharge to select a predetermined cell and said sustain discharge, and

said group of pulses causing said first assistant discharge each have an idle period narrower than that of a group of pulses for said sustain discharge.

9. A method of driving a plasma display panel comprising at least one electrode which is covered with dielectric,

a sustain discharge comprising a first discharge and a second discharge,

said first discharge being mainly induced by externally-applied voltage,

said second discharge being mainly induced by wall charges generated by said first discharge,

said sustain discharge being performed a specified number of times between said first and second electrodes to obtain a predetermined luminance, and

a group of pulses causing a first assistant discharge being applied in a form not to induce said second discharge between an addressing discharge to select a predetermined cell and said sustain discharge.

10. The method of claim 9, wherein

said group of pulses causing said first assistant discharge each have a pulse width larger than that of a group of pulses causing said sustain discharge.

11. The method of claim 9, wherein

said group of pulses causing said first assistant discharge each have an idle period narrower than that of a group of pulses for said sustain discharge.

13. The method of claim 9, wherein

said sustain discharge in a sub-field having little luminance information includes only said first assistant discharge.

14. A method of driving a surface-discharge type AC plasma display panel,

said surface-discharge type AC plasma display panel comprising:

first and second electrodes in a pair;

a third electrode provided in a direction to cross said first and second electrodes; and

a dielectric layer covering said first and second electrodes to stack wall charges,

wherein a sustain discharge period comprises

a first period in which a first discharge mainly induced by externally-applied voltage across said first and second electrodes is caused;

a second period following said first period; and

a third period following said second period, in which said first discharge and a second discharge mainly induced by said wall charges are caused in this order,

and wherein a potential of said third electrode is switched between a first potential and a second potential lower than said first potential and higher than a ground potential in said second period.