Patent application number | Description | Published |
20080272696 | Plasma Display Panel - A plasma display panel has a first substrate, plural pairs of display electrodes, a second substrate, and plural data electrodes. Each pair of the display electrodes is made up of a scanning electrode and a sustain electrode which are arranged parallel to each other on the first substrate. The second substrate is disposed opposite to the first substrate. A discharge space is formed between the first substrate and second substrate. The data electrodes are arranged in a direction perpendicular to the display electrodes on the second substrate. The data electrode is wider in peripheral portion of the second substrate than in a central portion of the second substrate. | 11-06-2008 |
20090009436 | PLASMA DISPLAY PANEL DEVICE AND DRIVE METHOD THEREOF - Provided are a PDP device and a drive method thereof which restrict the generation of an erroneous discharge in the all-cell reset period and to restrict the appearance of flickers in the areas with low grayscale levels even if some areas have a lower firing voltage than the other areas due to variation of a property in the panel surfaces or due to a long-term driving, or even if the voltage applied to the address electrode is increased with the pursuit of high definition. | 01-08-2009 |
20090015520 | PLASMA DISPLAY PANEL APPARATUS AND METHOD FOR DRIVING THE SAME - The present invention provides a plasma display panel and a method for driving the plasma display panel each of which ensures to suppress problems associated with an erroneous discharge resulting from accidental occurrence of a strong discharge in a reset period as well as with an address discharge delay. The problems are suppressed without applying an auxiliary erase pulse after the reset period ends. As a result, image display is provided with no flickering and good quality. The reset period includes a first step of applying a voltage having an ascending ramp waveform and a second step of applying a voltage having a descending ramp waveform. Between the first and second steps, a potential change waveform having a rise or fall (voltage change pulse) is applied at least to scan electrodes, sustain electrodes, or address electrodes. | 01-15-2009 |
20090102755 | DRIVING METHOD OF PLASMA DISPLAY PANEL - In a driving method of a panel, one field period is formed by arranging a plurality of subfields that have an address period for selectively causing address discharge in a discharge cell, and a sustain period for causing as many sustain discharges as the number corresponding to luminance weight in the discharge cell. One field period is formed by arranging a plurality of subfield groups having a plurality of subfields whose luminance weights monotonically increase. In the discharge cell for causing address discharge in a certain subfield other than the head subfield in each subfield group, address discharge is caused even in the head subfield. | 04-23-2009 |
20090167740 | PLASMA DISPLAY DEVICE AND METHOD FOR DRIVING PLASMA DISPLAY PANEL - A method for driving a plasma display panel that includes a plurality of discharge cells including a display electrode pair composed of a scan electrode and a sustain electrode. One field period includes a plurality of subfields each including an initializing period, an address period and a sustain period. The method includes applying at least two kinds of sustain pulses to one electrode of the scan electrode and the sustain electrode in the sustain period, the two kinds of sustain pulses including a first sustain pulse as a reference and a second sustain pulse rising more steeply and falling more gently than the first sustain pulse. In the method, a drive waveform voltage applied to the one electrode includes a last drive waveform voltage in the sustain period and a predetermined number of the second sustain pulses continuously disposed immediately before the last drive waveform voltage. | 07-02-2009 |
20090179877 | DRIVING METHOD OF PLASMA DISPLAY PANEL - In a driving method of a panel, one field period is formed by arranging a plurality of subfields that have an initializing period for causing initializing discharge in a discharge cell, an address period for selectively causing address discharge in the discharge cell, and a sustain period for causing as many sustain discharges as the number corresponding to luminance weight in the discharge cell. One field period is formed by arranging a plurality of subfield groups having a plurality of subfields whose luminance weights monotonically increase. A holding period when discharge is not caused is disposed before the head subfield belonging to at least one subfield group of the plurality of subfield groups. In the initializing period of the head subfield belonging to at least one subfield group, an initializing operation of causing initializing discharge is performed in the discharge cell where the sustain discharge has been performed in the sustain period of the immediately preceding subfield. | 07-16-2009 |
20090278821 | PLASMA DISPLAY DEVICE - A plasma display device includes an AD converter; a video signal processing circuit producing subfield data; a subfield processing circuit producing control signals of each of drive circuits; a plasma display panel having scan electrodes and sustain electrodes which are alternately arranged in n rows, and data electrodes in (k+m) columns arranged in a direction of intersecting with the scan and sustain electrodes; a scan-electrode drive circuit for driving scan electrodes; a sustain-electrode drive circuit for driving sustain electrodes; and a data-electrode drive circuit which has a first drive circuit for driving data electrodes and a second drive circuit for driving data electrodes, and applies writing pulse voltage in order from a data electrode group nearest to the scan-electrode drive circuit. | 11-12-2009 |
20090284510 | AC PLASMA DISPLAY PANEL DRIVING METHOD - In a method of driving an AC plasma display panel of the present invention, one field period is made of a plurality of sub-fields (SFs), each including an initializing period, writing period, and sustaining period, and a part of sustaining operation in the sustaining period in at least one of the plurality of SFs and a part of selective initializing operation in the initializing period in a SF following the at least one SF are performed at the same time. The method comprises making a pulse width of a top sustain pulse in one of the sustaining periods in the plurality of SFs different from that in another of the sustaining periods therein. This method limits the SFs in which any erroneous discharge occurs to lower order of SFs and can inhibit the brightness of the erroneous discharge. | 11-19-2009 |
20090322732 | METHOD FOR DRIVING PLASMA DISPLAY PANEL AND PLASMA DISPLAY DEVICE - The method for driving a plasma display panel effects control of the subfields as follows. The all-cell initializing operation on the discharge cell is carried out in the initializing period of at least one sub-filed; the rest of the subfields other than the aforementioned subfield selectively carry out an addressing operation in each discharge cell. Gradation display is attained by combination of a subfield having an address discharge in the address period and a sub-filed with no address discharge in the address period. In a discharge cell where an address discharge is generated in the address period of a subfield that follows the subfield having the all-cell initializing operation in the initializing period, the subfield having the all-cell initializing operation has an address period for generating an address discharge. | 12-31-2009 |
20100001986 | PLASMA DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - A method for driving a plasma display device which includes a plasma display panel provided with a plurality of discharge cells having a display electrode pair including a scan electrode and a sustain electrode, a temperature detection circuit for detecting an ambient temperature of the panel and outputting an detected temperature, and an APL detection circuit for detecting an APL of an image signal. The method provides an unusual-charge erasing period for applying a rectangular waveform voltage to the scan electrode between the initializing period and the address period in at least one subfield among the plurality of subfields; and controls a time period during which the rectangular waveform voltage is applied, based on the detected temperature detected by the temperature detection circuit and the APL detected by the APL detection circuit. | 01-07-2010 |
20100013819 | PLASMA DISPLAY PANEL APPARATUS DRIVING METHOD AND PLASMA DISPLAY PANEL APPARATUS - In a former half (T | 01-21-2010 |
20100033454 | METHOD FOR DRIVING PLASMA DISPLAY PANEL, AND PLASMA DISPLAY DEVICE - In the method for driving a plasma display panel and the plasma display device, the scan electrodes of the plasma display panel are divided into two scan electrode groups, the address period of subfields is divided into two address periods corresponding to the two scan electrode groups, and at least in one address period, the scan electrodes belonging to the scan electrode group provided with scan pulses are sequentially provided with scan pulses shifting from second voltage higher than scan pulse voltage to scan pulse voltage and shifting again to second voltage, and the scan electrodes belonging to the scan electrode group not provided with scan pulses are provided with either third voltage higher than scan pulse voltage or fourth voltage higher than second voltage and third voltage, and with third voltage at least while scan pulse voltage is applied to adjacent scan electrodes. | 02-11-2010 |
20100033506 | METHOD OF DRIVING PLASMA DISPLAY PANEL - A driving method of plasma display panels is disclosed. This method can suppress a dark belt occurring in displaying a video of a lower part of grayscale. One field includes plural sub-fields, and each one of the sub-fields has an addressing period during which a scan pulse is applied to the scan electrodes and a data pulse is applied to the data electrodes, and a sustaining period during which a sustain pulse is applied to the scan electrodes and the sustain electrodes. A time interval between a scan pulse applied lastly during the addressing period and a sustain pulse applied firstly during the sustaining period is defined as a last pulse-interval. The last pulse-interval of at least one sub-field of a lower part of grayscale, which lower part is darker than a predetermined level of the grayscale, is set longer than the last pulse-intervals of the other sub-fields. | 02-11-2010 |
20100039415 | PLASMA DISPLAY DEVICE AND METHOD FOR DRIVING PLASMA DISPLAY PANEL - A plasma display panel; a scan electrode drive circuit for generating a gently decreasing downward inclined waveform voltage in an initializing period, a gently increasing first inclined waveform voltage in an initializing period of at least one subfield in one field period, and a second inclined waveform voltage having a steeper gradient than the first inclined waveform voltage and decreasing immediately after the increasing waveform voltage reaches a predetermined potential in the last part of the sustain period; and a panel temperature detecting circuit are provided. The lowest voltage in the downward inclined waveform voltage is switched at a first voltage, a second voltage higher than the first voltage and a third voltage higher than the second voltage to generate a downward inclined waveform voltage. The lowest voltage is switched according to the temperature detected by the panel temperature detecting circuit to generate the downward inclined waveform voltage. | 02-18-2010 |
20100053134 | PLASMA DISPLAY DEVICE AND PLASMA DISPLAY PANEL DRIVING METHOD - A sustain pulse generation circuit of a plasma display device generates and switches a first sustain pulse for causing light emission having double peaks, a second sustain pulse having a falling edge steeper than that of the first sustain pulse, and a third sustain pulse having a rising edge and a falling edge steeper than those of the first sustain pulse and causing light emission having a single peak. The second sustain pulse or the third sustain pulse is generated immediately before the third sustain pulse. The first sustain pulse is generated immediately before the second sustain pulse. Provided between the second sustain pulse and the third sustain pulse and between the third sustain pulses is a first overlap period in which a time period for causing the corresponding sustain pulse to rise is overlapped with a time period for causing the corresponding sustain pulse to fall. | 03-04-2010 |
20100060625 | PLASMA DISPLAY DEVICE, AND PLASMA DISPLAY PANEL DRIVING METHOD - Provided to stabilize generation of address discharge and improve gradation characteristics of display images are the following elements: a plasma display panel; a sustain pulse generating circuit; and a ramp voltage generating circuit including a first ramp voltage generating circuit, a second ramp voltage generating circuit, and a switching circuit. The first ramp voltage generating circuit generates a first ramp voltage gently increasing in an initializing period. The second ramp voltage generating circuit generates a second ramp voltage increasing with a gradient gentler than that of the rising edge of a sustain pulse and steeper than that of the first ramp voltage, at the end of each sustain period. The switching circuit stops the operation of the second ramp voltage generating circuit immediately after the second ramp voltage reaches a predetermined electric potential. In at least one sustain period of one field, no sustain pulse but the second ramp voltage is generated. | 03-11-2010 |
20100103161 | PLASMA DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A voltage of sustain electrodes (SU | 04-29-2010 |
20100141637 | METHOD FOR DRIVING PLASMA DISPLAY PANEL - The plasma display panel driving method is a method of driving a panel provided with a plurality of discharge cells, each having a scan electrode and a sustain electrode, and includes forming one-field period by arranging a plurality of sub-fields including an initializing period, address period, and sustain period, wherein sustain pulse is either a first sustain pulse for generating emission having one peak at the discharge cell or a second sustain pulse for generating emission having two peaks at the discharge cell, and rise time of second sustain pulse applied to the scan electrode and rise time of second sustain pulse applied to the sustain electrode are individually set in accordance with ratios of discharge cells for emitting light in the sustain period of the sub-field. | 06-10-2010 |
20100164997 | PLASMA DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - A plasma display device and a driving method thereof are provided. The plasma display device has a panel having a plurality of discharge cells including a display electrode pair that is formed of a scan electrode and a sustain electrode, and a temperature detecting circuit for detecting the ambient temperature of the panel and outputting the detected temperature. In the driving method, an unusual charge erasing period when a rectangular waveform voltage is applied to the scan electrode is disposed between the initializing period and address period of at least one of a plurality of subfields, and the number of subfields having the unusual charge erasing period is controlled based on the detected temperature detected by the temperature detecting circuit. | 07-01-2010 |
20100259521 | DRIVING DEVICE AND DRIVING METHOD OF PLASMA DISPLAY PANEL AND PLASMA DISPLAY APPARATUS - A two-phase driving operation is performed by a first circuit and a second circuit in at least one sub-field. The first circuit applies a first ramp waveform that drops from a first potential to a second potential to a plurality of first scan electrodes in a setup period, and sequentially applies a scan pulse to the plurality of first scan electrodes in a write period. The second circuit applies a second ramp waveform that drops from the first potential to a third potential that is higher than the second potential to a plurality of second scan electrodes, and then raises the plurality of second scan electrodes to a fourth potential in the setup period, and holds the plurality of second scan electrodes at a fifth potential that is higher than the third potential and lower than the fourth potential in a period where the first scan pulse is applied, and then sequentially applies a scan pulse to the plurality of second electrodes in the write period. Discharge failures during write discharges can be prevented from occurring by employing the two-phase driving operation. | 10-14-2010 |
20100265219 | DRIVING DEVICE AND DRIVING METHOD OF PLASMA DISPLAY PANEL AND PLASMA DISPLAY APPARATUS - A two-phase driving operation is performed by a first circuit and a second circuit in at least one sub-field. The first circuit applies a first ramp waveform that drops from a first potential to a second potential to a plurality of first scan electrodes in a setup period, and sequentially applies a scan pulse to the plurality of first scan electrodes in a write period. The second circuit applies a second ramp waveform that drops from the first potential to a third potential that is higher than the second potential to a plurality of second scan electrodes in the setup period, and holds the second scan electrodes at a fourth potential that is higher than the third potential in a period where the scan pulse is applied to the first scan electrodes, and then sequentially applies a scan pulse to the plurality of second electrodes in the write period. Discharge failures during write discharges can be prevented from occurring by applying the two-phase driving operation. | 10-21-2010 |
20110122112 | PLASMA DISPLAY AND DRIVING METHOD FOR PLASMA DISPLAY PANEL - Even in a plasma display panel of large screen size and high definition, address discharge is caused stably. A plasma display device has a plasma display panel and a scan electrode driving circuit. The plasma display panel includes a discharge cell having a display electrode pair that is formed of a scan electrode and a sustain electrode. A plurality of subfields having an initializing period, an address period, and a sustain period are disposed in one field period. The scan electrode driving circuit generates an increasing first ramp voltage in the initializing period of at least one subfield in one field period, generates sustain pulse voltage that varies from a base potential to a potential for causing sustain discharge in the sustain period, and generates second ramp voltage that is increased and is dropped immediately after reaching a predetermined potential at the end of the sustain period. | 05-26-2011 |
20120026142 | PLASMA DISPLAY PANEL DRIVE METHOD AND PLASMA DISPLAY DEVICE - The luminance of black level in an image displayed on a plasma display panel is reduced to enhance the contrast and image display quality. For this purpose, in an initializing period, one of a forced initializing waveform, a selective initializing waveform, and a non-initializing waveform is applied to scan electrodes. Further, one field is formed of a special initializing subfield where the forced initializing waveform and the non-initializing waveform are selectively generated, and a plurality of selective initializing subfields where only the selective initializing waveform is generated. The number of forced initializing waveforms applied to one scan electrode is one in one field group. The non-initializing waveform is applied to the scan electrodes on both sides of the scan electrode applied with the forced initializing waveform in a special initializing subfield, in at least two special initializing subfields, i.e. the special initializing subfield and a special initializing subfield immediately succeeding the special initializing subfield. | 02-02-2012 |
20120075283 | PLASMA DISPLAY PANEL DRIVE METHOD AND PLASMA DISPLAY DEVICE - In a driving method for a plasma display panel, in the initializing period in at least one of a plurality of subfields, selective initializing operation is performed that selectively causes initializing discharge only in a discharge cell having undergone address discharge in an immediately preceding address period. The selective initializing operation includes the step of applying first voltage to the sustain electrode and applying an up-ramp waveform voltage to the scan electrode, the step of applying a first down-ramp waveform voltage to the scan electrode and then applying a positive rectangular voltage to it, and the step of applying second voltage higher than the first voltage to the sustain electrode and applying a second down-ramp waveform voltage to the scan electrode. | 03-29-2012 |
20120146974 | PLASMA DISPLAY PANEL - A plasma display panel has a first substrate, plural pairs of display electrodes, a second substrate, and plural data electrodes. Each pair of the display electrodes is made up of a scanning electrode and a sustain electrode which are arranged parallel to each other on the first substrate. The second substrate is disposed opposite to the first substrate. A discharge space is formed between the first substrate and second substrate. The data electrodes are arranged in a direction perpendicular to the display electrodes on the second substrate. The data electrode is wider in peripheral portion of the second substrate than in a central portion of the second substrate. | 06-14-2012 |
20130322038 | PORTABLE WIRELESS DEVICE - An antenna includes two elements having an antenna element which resonates by a frequency f | 12-05-2013 |