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 |
20090009435 | Method of Driving Plasma Display Panel and Plasma Display Unit - A method of driving a panel and a plasma display unit is provided, wherein one field comprises a plurality of subfields, each having an addressing period for producing an address discharge selectively in any of discharge cells, and a sustaining period for producing a sustain discharge by applying a number of sustaining pulses corresponding to a weight of brightness in the discharge cell where the address discharge has been produced. Provided therein is a sustaining pulse generator circuit comprising a power recovery section for rising or falling the sustaining pulse by producing resonance between an inter-electrode capacitance of a display electrode pair and an inductor, and a clamping section for clamping a voltage of the sustaining pulse at a predetermined potential, wherein the power recovery section is used to set twice a time of rising the sustaining pulse to become equal to or longer than a duration of the sustaining pulse. The method and the plasma display unit realize a remarkable reduction of power consumption while achieving high brightness of the panel. | 01-08-2009 |
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 |
20090096719 | METHOD OF DRIVING PLASMA DISPLAY PANEL, AND PLASMA DISPLAY DEVICE - A method and device for driving a plasma display panel are provided that do not cause false lighting even if the all-cell initializing operation becomes unstable. In an initializing period of a subfield, an all-cell initializing operation of causing initializing discharge in all discharge cells or a selective initializing operation of causing initializing discharge in the discharge cell that has caused sustain discharge in the last sustain period is performed. In a field corresponding to an image signal for displaying black on the whole screen, an abnormal charge erasing period for applying rectangular waveform voltage to the scan electrode is disposed after the initializing period in the subfield where the all-cell initializing operation is firstly performed. In a field corresponding to an image signal other than the image signal for displaying black on the whole screen, an abnormal charge erasing period for applying rectangular waveform voltage to the scan electrode is disposed after the initializing period in any subfield after the subfield where the all-cell initializing operation is firstly performed. | 04-16-2009 |
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 |
20090153439 | PLASMA DISPLAY DEVICE AND PLASMA DISPLAY PANEL DRIVE METHOD - A plasma display device includes a plurality of sub fields, each sub field having an address period and a sustain period in which a sustain discharge is generated by applying a sustain pulse by the number of times corresponding to a brightness weight. A sustain pulse generating circuit has a power recovery section for raising or lowering the sustain pulse by allowing an inter-electrode capacitor of a display electrode pair including a scan electrode and a sustain electrode and an inductor to resonate and a clamp section for clamping a voltage of the sustain pulse to a predetermined voltage. The sustain pulse generating circuit sets a sustain pulse for generating a sustain discharge just before the final sustain discharge in the sustain period to a sustain pulse other than a sustain pulse having the shortest repetition period. | 06-18-2009 |
20090184952 | PLASMA DISPLAY DEVICE AND DRIVING METHOD OF PLASMA DISPLAY PANEL - A plasma display device has a plasma display panel, an accumulative adding circuit for accumulatively adding predetermined values every predetermined unit time while current is applied to the plasma display panel, and a judging circuit for judging the property of an image to be displayed on the plasma display panel. The accumulative adding circuit varies the predetermined values in response to the judgment result of the judging circuit. | 07-23-2009 |
20090195560 | Method of Driving Plasma Display Panel and Plasma Display Device - The present invention provides a method of driving a plasma display panel that displays an image with high brightness, high contrast, and high display quality by stabilizing selective initializing operation. To realize it, a plurality of subfields each having a setup period, an address period, and a sustain period are provided in one field period. Retention time for retaining voltages to be applied to a scan electrode and a sustain electrode is provided between time when voltage for weakening the final sustain discharge in the sustain period is applied to the sustain electrode and time when a ramp waveform voltage which decreases is applied to the scan electrode in the setup period in the following subfield. The retention time is controlled based on average brightness of image signals or ambient temperature. | 08-06-2009 |
20090251389 | PLASMA DISPLAY PANEL DRIVING METHOD AND PLASMA DISPLAY DEVICE - A plasma display panel driving method and a plasma display device estimate the highest temperature and the lowest temperature the panel can have, according to the temperature detected by the thermal sensor, and appropriately drives the panel, to improve the image display quality. Provided are at least three driving modes having different sub-field structures: a low-temperature driving mode, an ordinary-temperature driving mode, and a high-temperature driving mode. To drive the panel, estimates of the highest temperature and the lowest temperature the panel can have are made from the temperature detected by the thermal sensor, the temperature condition of the panel is determined from the estimated highest temperature or lowest temperature, and the driving mode is switched appropriately for the panel temperature condition. | 10-08-2009 |
20090289960 | PLASMA DISPLAY DEVICE AND PLASMA DISPLAY PANEL DRIVE METHOD - A plasma display device includes a sustain pulse generating circuit having a power recovery section for raising or lowering the sustain pulse by allowing an inductor and an inter-electrode capacitor of the display electrode pair to resonate and a clamp section for clamping a voltage of the sustain pulse to a predetermined voltage. The sustain pulse generating circuit sets the sustain pulse generated in the sustain period so as to include sustain pulses in which the lengths of time for raising the sustain pulses using the power recovery section are different from each other, and sets the sustain pulse for generating the final sustain discharge in the sustain period to a sustain pulse other than a sustain pulse in which the length of time for raising the sustain pulse is the longest. | 11-26-2009 |
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 |
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 |
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 |
20120200564 | PLASMA DISPLAY DEVICE DRIVE METHOD, PLASMA DISPLAY DEVICE AND PLASMA DISPLAY SYSTEM - A high-quality stereoscopic image is displayed by suppressing crosstalk between an image for the right eye and an image for the left eye and stabilizing an address discharge. For this purpose, in the method for driving the plasma display apparatus, an image for the right eye and an image for the left eye are alternately displayed on the plasma display panel by alternately repeating a field for the right eye and a field for the left eye. In each of the field for the right eye and the field for the left eye, the subfield having the smallest luminance weight is placed first, the subfield having the largest luminance weight is placed next, and the other subfields are placed thereafter so as to have luminance weights sequentially decreasing. | 08-09-2012 |
20120200616 | PLASMA DISPLAY DEVICE DRIVE METHOD, PLASMA DISPLAY DEVICE AND PLASMA DISPLAY SYSTEM - Crosstalk between right-eye images and left-eye images is suppressed, and high-quality 3D images are displayed. For this purpose, a driving method of a plasma display apparatus is provided. The plasma display apparatus has a plasma display panel and a driver circuit for driving the panel. In this driving method, right-eye images and left-eye images are alternately displayed on the panel by alternately repeating right-eye fields, each of which has a plurality of subfields and displays a right-eye image signal, and left-eye fields, each of which has a plurality of subfields and displays a left-eye image signal. Each subfield has an address period for performing an address operation and a sustain period for performing a sustain operation. In a discharge cell where gradation of a predetermined threshold or higher is displayed, the address operation is prohibited in the subfield disposed last in the field. | 08-09-2012 |
20120249500 | METHOD OF DRIVING PLASMA DISPLAY DEVICE, PLASMA DISPLAY DEVICE, AND PLASMA DISPLAY SYSTEM - An address period is shortened while degradation of image display quality of a plasma display apparatus is suppressed. For this purpose, in a driving method for a plasma display apparatus including a plasma display panel with a plurality of discharge cells having a scan electrode, a sustain electrode, and a data electrode, and a driver circuit, the following operation is performed. The driver circuit forms one field period by a subfield that displays an interlace signal as an image signal thinned out every one line and a subfield that displays oblique line interpolated data generated by interpolating oblique lines detected by an image signal. In the subfield displaying an image signal, the driver circuit performs two-line simultaneous address operation with application of a scan pulse simultaneously to two adjacent scan electrodes so as to generate an address discharge in a discharge cell. | 10-04-2012 |
20120256978 | METHOD OF DRIVING PLASMA DISPLAY DEVICE, PLASMA DISPLAY DEVICE, AND PLASMA DISPLAY SYSTEM - An address period is shortened while degradation of image display quality of a plasma display apparatus is suppressed. For this purpose, in a driving method for a plasma display apparatus, the following operation is performed. A field for the right eye and a field for the left eye are alternately displayed on the plasma display panel. In each of the field for the right eye and the field for the left eye, a subfield having a smallest luminance weight occurs first, a subfield having a largest luminance weight occurs next, and the other subfields occur thereafter. In the subfield having the smallest luminance weight and the subfield having the largest luminance weight, one-line address operation for applying a scan pulse to each scan electrode is performed. In the other subfields, two-line simultaneous address operation for applying a scan pulse simultaneously to two adjacent scan electrodes is performed. | 10-11-2012 |
20120293508 | PLASMA DISPLAY DEVICE, PLASMA DISPLAY SYSTEM, AND METHOD OF CONTROLLING SHUTTER GLASS FOR PLASMA DISPLAY DEVICE - In a plasma display apparatus capable of displaying an image for stereoscopic view, the image display quality is enhanced. For this purpose, the plasma display apparatus includes a driver circuit and a timing generation circuit. The driver circuit drives the plasma display panel in a manner such that a field for the right eye and a field for the left eye are alternately repeated, each field is formed of an all-cell initializing subfield and a selective initializing subfield, and the top subfield of each field is the all-cell initializing subfield. The timing generation circuit generates shutter opening/closing timing signals. The timing generation circuit generates the shutter opening/closing timing signals such that both timing signal for opening/closing the right eye shutter and timing signal for opening/closing the left eye shutter are set to OFF in the all-cell initializing period of the fields for the right eye and for the left eye. | 11-22-2012 |
20120327053 | PLASMA DISPLAY DEVICE, PLASMA DISPLAY SYSTEM, DRIVE METHOD FOR PLASMA DISPLAY PANEL, AND CONTROL METHOD FOR SHUTTER GLASSES FOR PLASMA DISPLAY DEVICE - Sharp contrast is achieved while the driving time in displaying a 3D image on a plasma display panel is shorted. For this purpose, an all-cell initializing subfield for applying up-ramp waveform voltage and down-ramp waveform voltage to a scan electrode in the initializing period is set as the first subfield of one field. The plasma display panel is driven by one of 3D drive and 2D drive. A gradient of at least one of the up-ramp waveform voltage and the down-ramp waveform voltage in the all-cell initializing period during the 3D drive is set to be steeper than a gradient of the one waveform voltage in the all-cell initializing period during the 2D drive. A shutter opening/closing timing signal is generated so that both of a right-eye timing signal and a left-eye timing signal are in the OFF state in the all-cell initializing period during the 3D drive. | 12-27-2012 |
20130002733 | PLASMA DISPLAY DEVICE DRIVING METHOD, PLASMA DISPLAY DEVICE, AND PLASMA DISPLAY SYSTEM - A plasma display apparatus usable as a 3D image display apparatus can reduce the crosstalk for a user who views a 3D image displayed on a plasma display panel through shutter glasses. For this purpose, the plasma display apparatus displays the 3D image on the plasma display panel having a plurality of pixels each of which is formed of a plurality of discharge cells by alternately repeating a right-eye field and a left-eye field. The plasma display apparatus adds a predetermined gradation value to an image signal to be displayed in a certain field when the number of pixels where the gradation equal to or higher than a high gradation threshold is displayed in the field immediately before a certain field and the gradation equal to or lower than a low gradation threshold is displayed in the certain field is equal to or larger than a number-of-pixels threshold. | 01-03-2013 |