| Patent application number | Description | Published |
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| 20090058310 | PLASMA DISPLAY PANEL DRIVE CIRCUIT AND PLASMA DISPLAY APPARATUS - A drive circuit for driving a plasma display panel (PDP) includes a pulse voltage generation circuit ( | 03-05-2009 |
| 20090179829 | PLASMA DISPLAY PANEL DRIVING CIRCUIT AND PLASMA DISPLAY APPARATUS - An object of the present invention is to provide a PDP driving circuit and a plasma display apparatus each of which controls a discharge current at the time of sustain discharge by carrying out a switching operation during a power source clamping while changing a turn-on time, so as to display an image whose brightness is suppressed without deteriorating the gray scale. A PDP driving circuit ( | 07-16-2009 |
| 20090219272 | PLASMA DISPLAY PANEL DRIVE CIRCUIT AND PLASMA DISPLAY DEVICE - A PDP driving circuit and a plasma display apparatus with high image quality are realized. The PDP driving circuit of the present invention has a function of lowering the voltage of a recovery capacitor by connecting a step-up circuit including at least an inductor, a switch element, and a diode to the recovery capacitor, and regenerating the excessive voltage of the recovery capacitor to a sustain voltage power supply. Since the luminance can be lowered even in time of light load with low lighting rate by lowering the voltage of the recovery capacitor in time of low lighting rate, a high tone image display is realized, and the PDP driving circuit and the plasma display apparatus with high image quality are realized. In the data electrode driving circuit with slower write timing, the write operation is stabilized by raising the voltage of the recovery capacitor, whereby the PDP driving circuit and the plasma display apparatus with high image quality are realized. | 09-03-2009 |
| 20100188386 | PLASMA DISPLAY DEVICE AND PLASMA DISPLAY PANEL DRIVE METHOD - A stable address discharge is generated to achieve a high quality of image display. For this purpose, a plasma display panel, a scan electrode driving circuit, and a partial light-emitting rate detecting circuit are provided. The scan electrode driving circuit performs an address operation by sequentially applying a scan pulse to scan electrodes in an address period. The partial light-emitting rate detecting circuit divides the display area of the plasma display panel into a plurality of regions, and detects a rate of the number of discharge cells to be lit with respect to the number of discharge cells, as a partial light-emitting rate, in each of the regions. The scan electrode driving circuit performs the address operation earlier on the regions having the higher light-emitting rates detected in the partial light-emitting rate detecting circuit in decreasing order of value. | 07-29-2010 |
| 20100194732 | DRIVING DEVICE AND DRIVING METHOD OF PLASMA DISPLAY PANEL, AND PLASMA DISPLAY APPARATUS - In a setup period of a first SF, a first ramp waveform (L | 08-05-2010 |
| 20100271409 | IMAGE DISPLAY APPARATUS, COLOR SIGNAL CORRECTION APPARATUS, AND COLOR SIGNAL CORRECTION METHOD - Upon displaying an image using the subfield driving method, a luminance discrepancy or a chromaticity discrepancy is reduced while effects of horizontal crosstalk are reduced. | 10-28-2010 |
| 20110057911 | PLASMA DISPLAY PANEL DRIVING METHOD AND PLASMA DISPLAY APPARATUS - A plurality of display electrode pairs are divided into two display electrode pair groups I and II. One field is divided into M (M is an integer of 2 or more) sub-fields SFL (L=1 to M) each including a wall voltage adjusting period, an address period, and a sustain period. Based on a sustain period T1 of a K-th sub-field SFK and a wall voltage adjusting period T2 positioned between the sustain period T1 and the address period of a (K+1)-th sub-field, if T1>T2, a first driving method in which the sustain period T1 and the wall voltage adjusting period T2 are set for each of the display electrode pair groups I and II is used in the sub-field SFK, and if T1| 03-10-2011 | |
| 20110084957 | PLASMA DISPLAY PANEL DRIVE CIRCUIT AND PLASMA DISPLAY DEVICE - A plasma display panel drive circuit assures a sufficient number of subfields in a high resolution panel, is low cost, and is resistant to producing brightness differences. The plasma display panel drive circuit segments plural sustain electrodes into a first sustain electrode group and second sustain electrode group, applies sustain pulses in the sustain period, and includes the following devices: a sustain pulse generating circuit that generates sustain pulses; a specific voltage application circuit that applies a specific voltage to a first electrode path to the first sustain electrode group, and a second electrode path to the second sustain electrode group, at respective specific times; and a separation switch circuit that is connected between the sustain pulse generating circuit and the first electrode path and second electrode path, and electrically isolates the sustain pulse generating circuit from either the first electrode path or the second electrode path. | 04-14-2011 |
| 20110090211 | CIRCUIT FOR DRIVING PLASMA DISPLAY PANEL AND PLASMA DISPLAY DEVICE - A simple, low cost drive circuit secures a sufficient number of subfields in a high resolution panel. The plasma display panel drive circuit groups plural sustain electrodes into first and second sustain electrode groups, and applies sustain pulses in the sustain period. The first and second sustain pulse generating circuits generate and apply sustain pulses to first and second electrode paths. First and second specific voltage application circuits apply a first specific voltage to the first and second electrode paths. The voltage selection circuit selects one of a plurality of voltages including at least a second specific voltage and a third specific voltage, and generates a selected voltage. The first and second sustain pulse generating circuits generate the sustain pulses based on the second specific voltage when the selected voltage is the second specific voltage, and when the selected voltage is the third specific voltage, apply the third specific voltage to the first and second electrode paths. | 04-21-2011 |
| 20110109653 | PLASMA DISPLAY PANEL APPARATUS AND DRIVING METHOD OF PLASMA DISPLAY PANEL - In a two-phase driving operation that is performed in at least one sub-field when an average luminance level is a predetermined value or more, a first ramp waveform that drops from a first potential to a second potential is applied to a plurality of first electrodes, a second ramp waveform that drops from a third potential that is higher than the first potential to a fourth potential that is higher than the second potential is applied to a plurality of second scan electrodes in a setup period, and a scan pulse is sequentially applied to the plurality of first scan electrodes, and then a scan pulse is sequentially applied to the plurality of second electrodes in a write period. The two-phase driving operation is employed to prevent discharge failures during write discharges. | 05-12-2011 |
| 20110134105 | METHOD OF DRIVING PLASMA DISPLAY PANEL, AND PLASMA DISPLAY APPARATUS - In a driving method of a plasma display panel of the present invention, plural display electrode pairs are divided into plural display electrode pair groups and one field is divided into plural sub-fields. The length of the sustain period is compared to the length of the erase period. If the sustain period is longer than the erase period, sustain discharge and erase discharge are performed for each of the display electrode pair groups, while if the sustain period is shorter than the erase period, sustain discharge and erase discharge of one display electrode pair group are synchronized with those of another display electrode pair group. For a sub-field with a largest luminance weight or a sub-field with a highest lighting ratio, sustain discharge and erase discharge of one display electrode pair group are synchronized with those of another display electrode pair group without fail. | 06-09-2011 |
| 20110157139 | Driver Circuit for use in Plasma Display Panel Provided for Driving Dispaly Electrode Pairs Configured to Include Scan Electrode and Sustaining Electrodes - A driver circuit for use in a plasma display panel includes a scan electrode driver circuit including one scan electrode side sustaining pulse generator circuit, where a plurality of display electrode pairs is divided into a plurality of display electrode pair groups. The one scan electrode side sustaining pulse generator circuit generates a sustaining pulse to scan electrodes belonging to an arbitrary display electrode pair group, and a scan pulse generator circuit is provided for each of the plurality of display electrode pair groups, and generates a scan pulse applied to the scan electrodes belonging to the corresponding display electrode pair group. A scan electrode side switch circuit is provided for each of the scan pulse generator circuits, and achieves electrical separation or connection between the corresponding scan pulse generator circuit and the scan electrode side sustaining pulse generator circuit. | 06-30-2011 |
