Patent application number | Description | Published |
20080284681 | Method of Driving Plasma Display Panel, and Plasma Display Device - One field is formed of a plurality of sub-fields, and each one of the sub-fields includes an initializing period, addressing period, and sustained period. The sub-field is one of an entire-cell initialization sub-field or a selective-cell initialization sub-field. When the entire initialization sub-field is switched to the selective one or vice versa, an initializing voltage which generates initializing discharge in the entire initialization sub-field is controlled. This control allows varying the number of the entire initializations and stabilizing address discharge in a plasma display panel, and at the same time, making the black luminance inconspicuous for improving the picture quality. | 11-20-2008 |
20080309591 | Image Display Method - An image display method for allowing an image display device having a large number of pixels arrayed in a planar form to perform an image display by forming one field period from plural sub-fields for which luminance weights to be displayed are determined, and choosing plural luminances among displayable luminances as luminances for display by combining the luminance weights of the sub-fields, so that the respective pixels are controlled not to emit light or to emit light in each sub-field correspondingly to the luminances for display to be displayed. At least one threshold value is set, and when a pixel is allowed to emit light at a luminance for display at or higher than a first threshold value, which is the smallest threshold value, the pixel is controlled not to emit light constantly or to emit light constantly in a sub-field having the smallest luminance weight. | 12-18-2008 |
20090021452 | METHOD OF DRIVING PLASMA DISPLAY PANEL, AND PLASMA DISPLAY DEVICE - A panel driving method has, in one filed time period, an all-cell initializing subfield for causing initializing discharge in all discharge cells for displaying an image in the initializing period, and a selection initializing subfield for selectively causing initializing discharge in the discharge cell that has caused sustaining discharge in the last subfield in the initializing period. The number of all-cell initializing subfields can be increased and decreased, and the initializing voltage for causing initializing discharge in the all-cell initializing subfield can be varied. At least one of the number of all-cell initializing subfields and the initializing voltage of the all-cell initializing subfields in one field is controlled based on the accumulation of the panel power-on time. | 01-22-2009 |
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 |
20090128542 | Plasma Display Panel Driving Method and Plasma Display Apparatus - A plasma display panel driving method is provided in which one field of an image signal includes a plurality of sub fields each having an initialization period, an address period and a sustain period, one field period includes an all-cell initialization sub field in which an initializing discharge is generated by applying an initialization voltage to all the discharge cells to display the image in the initialization period, the initialization voltage can be varied, and the initialization voltage when an image satisfying predetermined conditions is displayed is set to be lower than an initialization voltage when an image satisfying no predetermined conditions is displayed. | 05-21-2009 |
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 |
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 |
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 |
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 |
20110148951 | PLASMA DISPLAY PANEL DRIVING METHOD AND PLASMA DISPLAY APPARATUS - A plasma display panel driving method is provided in which one field of an image signal includes a plurality of sub fields each having an initialization period, an address period and a sustain period, one field period includes an all-cell initialization sub field in which an initializing discharge is generated by applying an initialization voltage to all the discharge cells to display the image in the initialization period, the initialization voltage can be varied, and the initialization voltage when an image satisfying predetermined conditions is displayed is set to be lower than an initialization voltage when an image satisfying no predetermined conditions is displayed. | 06-23-2011 |
20110273481 | PLASMA DISPLAY DEVICE AND DRIVING METHOD OF PLASMA DISPLAY PANEL - The plasma display device has a sustain pulse generating circuit for generating sustain pulses in a sustain period. The sustain pulse generating circuit generates at least two kinds of sustain pulses of different rising gradients in the sustain period, generates a predetermined number of sustain pulse whose rising gradient becomes steeper to the latter half in at least one-side electrode in the sustain period after first two sustain pulses and except an erasing pulse, and continuously generates the sustain pulses while the rising gradient of the sustain pulses is varied in response to the light emitting rate of the plasma display panel in the sustain period. | 11-10-2011 |
20120280963 | PLASMA DISPLAY PANEL DRIVING METHOD AND PLASMA DISPLAY DEVICE - The present invention allows a plasma display apparatus having a high-luminance panel to decrease initializing bright points that easily occur just after power-on of the apparatus, enhancing the quality of display image. The panel has discharge cells, each of which including a data electrode, and a display electrode pair formed of a scan electrode and a sustain electrode. In the driving method of the panel, one field period is formed of subfields, each of which including an initializing period for generating initializing discharge in the discharge cells, an address period for applying scan pulses to the scan electrodes and applying address pulses to the data electrodes, and a sustain period for applying sustain pulses to the data electrode pairs. In the structure above, a predetermined period after power-off of the apparatus has no generation of the address pulses, the scan pulses, and the sustain pulses. | 11-08-2012 |
20120299981 | PLASMA DISPLAY DEVICE AND METHOD FOR DRIVING A PLASMA DISPLAY PANEL - The present invention allows a plasma display panel to have gradation levels being sufficient in number and to have stable address discharge. In the plasma display apparatus having a panel and a driver circuit, the driver circuit drives the panel on the subfield structure that satisfies the following. One field has a first subfield group and a second subfield group temporally successive to the first subfield group. Each of the subfield groups is formed of a plurality of temporally successive subfields. The luminance weight increases in the order of occurrence of the subfields within each subfield group. The first subfield of the second subfield group has a luminance weight smaller than that of the last subfield of the first subfield group. When a gradation having a level greater than a gradation threshold is displayed, the first subfield of the second subfield group has no light emission. | 11-29-2012 |