Abstract: Discharge for detecting the position coordinates of an electronic pen is caused stably, and the position coordinates are detected accurately. For this purpose, in a driving method of an image display device, an image display subfield, a y-coordinate detection subfield, and an x-coordinate detection subfield are set in one field. In the y-coordinate detection subfield, a y-coordinate detection voltage of positive voltage is applied to data electrodes and y-coordinate detection pulses of negative polarity are sequentially applied to the scan electrodes. In the x-coordinate detection subfield, an x-coordinate detection voltage of negative voltage is applied to scan electrodes and x-coordinate detection pulses of positive polarity are sequentially applied to data electrodes.

Abstract: Discharge for detecting the position coordinates of an electronic pen is caused stably, and the position coordinates are detected accurately. For this purpose, in a driving method of an image display device, an image display subfield group constituted of image display subfields, a y-coordinate detection subfield, and an x-coordinate detection subfield are set in one field. An initializing period, in which an up-ramp voltage and a down-ramp voltage are applied to the scan electrodes, is set in the x-coordinate detection subfield, and the x-coordinate detection subfield is disposed immediately after the y-coordinate detection subfield.

Abstract: Discharge for detecting the position coordinates of an electronic pen is caused stably, and the position coordinates are detected accurately. For this purpose, in a driving method of an image display device, an image display subfield group constituted of image display subfields, a timing detection subfield, a y-coordinate detection subfield, and an x-coordinate detection subfield are set in one field. In the timing detection subfield, a plurality of timing detection pulses for causing timing detection discharge in discharge cells is applied to scan electrodes and sustain electrodes alternately.

Abstract: Discharge for detecting the position coordinates of an electronic pen is caused stably, and the position coordinates are detected accurately. For this purpose, in a driving method of an image display device, an image display subfield, a y-coordinate detection subfield, and an x-coordinate detection subfield are included in one field. In the x-coordinate detection subfield, an x-coordinate detection waiting period is set in which a voltage higher than an x-coordinate detection voltage is applied to the scan electrodes and a voltage lower than the voltage of x-coordinate detection pulses is applied to the data electrodes. After the x-coordinate detection waiting period, the x-coordinate detection voltage is applied to the scan electrodes, and the x-coordinate detection pulses are sequentially applied to the data electrodes.

Abstract: Discharge for detecting the position coordinates of an electronic pen is caused stably, and the position coordinates are detected accurately. For this purpose, in a driving method of an image display device, an image display subfield, a y-coordinate detection subfield, and an x-coordinate detection subfield are included in one field. In an initializing period of the x-coordinate detection subfield, a first voltage is applied to data electrodes and a first down-ramp voltage is applied to scan electrodes. In the initializing period of the image display subfield, a second voltage is applied to the data electrodes and a second down-ramp voltage is applied to the scan electrodes. The voltage derived by subtracting an arrival voltage of the first down-ramp voltage from the first voltage is set higher than the voltage derived by subtracting an arrival voltage of the second down-ramp voltage from the second voltage.

Abstract: In a plasma display apparatus, the address discharge is stabilized, the contrast is sharpened, and the image display quality is improved. A first up-ramp waveform voltage is applied to the scan electrode, and then a voltage causing no discharge to the scan electrode is applied to the scan electrode, in the sustain period of a weak-discharge sustain operation subfield in a discharge cell that is to be subjected to a forced initializing operation in the initializing period of the subfield immediately after the weak-discharge sustain operation subfield. A second up-ramp waveform voltage is applied to the scan electrode after generation of the first up-ramp waveform voltage, in the sustain period of the weak-discharge sustain-operation subfield in a discharge cell that is to be subjected to a selective initializing operation in the initializing period of the subfield immediately after the weak-discharge sustain-operation subfield.

Abstract: A stable address operation is performed also when a plasma display panel having a high definition and large screen is driven. For this purpose, a driving method of a plasma display panel is provided. The panel is driven by forming one field using a plurality of subfields each of which has an address period and a sustain period in which sustain pulses varying from a base potential to a voltage at which a sustain discharge is caused in the discharge cell having undergone the address discharge are applied to the display electrode pairs. In the driving method, after generation of the final sustain pulse in the sustain period, an up-ramp waveform voltage which increases from the base potential to a predetermined voltage is applied to the scan electrodes. The predetermined voltage is set lower than the voltage of the sustain pulses.

Abstract: The image display quality is improved by uniforming the display luminance. For that purpose, the plasma display device has a plasma display panel, and image signal processing circuit. Image signal processing circuit includes loading correcting section. Section includes number-of-lit-cells calculating section for calculating the number of discharge cells to be lit for each display electrode pair in each subfield, load value calculating section for calculating the load value of each discharge cell based on the calculation result by number-of-lit-cells calculating section, correction gain calculating section for calculating the correction gain of each discharge cell based on the calculation result by load value calculating section and the positions of the discharge cells, and correcting section for subtracting, from an input image signal, the result derived by multiplying the input image signal by the output from correction gain calculating section.

Abstract: A voltage of sustain electrodes is lowered from Ve1 to a ground potential at a time point immediately before a first SF (sub-field). Then, a pulsed positive voltage is applied to data electrodes at a starting time point of a setup period of the first SF. Immediately before this, a large amount of negative wall charges is stored on the sustain electrodes and positive wall charges are stored on the data electrodes, and therefore application of the pulsed positive voltage to the data electrodes generates strong discharges between the sustain electrodes and the data electrodes. After that, application of a ramp voltage to scan electrodes is started at a time point, generating setup discharges between the scan electrodes and the sustain electrodes.

Abstract: In the plasma display apparatus, address discharge is caused stably. For this purpose, one of a forced initializing operation and a selective initializing operation is performed in the initializing period. Then, one field includes a specific-cell initializing subfield having an initializing period in which a forced initializing operation is performed in a specific discharge cell and a selective initializing operation is performed in the other discharge cells. In the address period of the specific-cell initializing subfield, the period in which a scan pulse and an address pulse are simultaneously applied to a discharge cell having undergone the selective initializing operation in the initializing period of the specific-cell initializing subfield is made longer than the period in which a scan pulse and an address pulse are simultaneously applied to a discharge cell having undergone the forced initializing operation in the initializing period of the specific-cell initializing subfield.

Abstract: In a plasma display apparatus, contrast is enhanced and a stable address discharge is caused. For this purpose, one of a forced initializing operation and a selective initializing operation is performed in initializing periods. A specified-cell initializing subfield and a selective initializing subfield are set in one field. In the specified-cell initializing subfield, the forced initializing operation is performed on specified discharge cells and the selective initializing operation is performed on the other discharge cells. In the selective initializing subfield, the selective initializing operation is performed on all the discharge cells. In the selective initializing period, a down-ramp waveform voltage is applied to the scan electrodes and a positive voltage is applied to the data electrodes. In the selective initializing subfield, based on the load calculated in the address period of the immediately preceding subfield, the minimum voltage of the down-ramp waveform voltage is controlled.

Abstract: Image display quality in the plasma display apparatus can be enhanced by allowing a stable address operation. For this purpose, the plasma display apparatus includes a scan electrode driver circuit. The scan electrode driver circuit generates driving voltages to be used in a subfield method and applies the driving voltages to scan electrodes. At the end of each sustain period, the scan electrode driver circuit performs the following operation. The scan electrodes are applied with a first ramp waveform voltage that rises from a base electric potential to a first electric potential. Subsequently, the electric potential of the scan electrodes is set to a second electric potential equal to or lower than the first electric potential. Subsequently, the scan electrodes are applied with a second ramp waveform voltage that rises from the second electric potential to a third electric potential higher than the first electric potential.

Abstract: Display luminance is uniformized to enhance image display quality. A sustain pulse generating circuit generates sustain pulses by selecting any one of a plurality of driving patterns, according to an all-cell light-emitting rate and a partial light-emitting rate. A loading correction part of the image signal processing circuit includes: number of lit cells calculator for calculating the number of discharge cells to be lit in each display electrode pair, in each subfield; load value calculator for calculating a load value of each discharge cell, according to the calculation result in number of lit cells calculator; correction gain calculator for calculating a correction gain of each discharge cell, according the calculation result in load value calculator, the driving pattern selected, and the position of the discharge cell; and corrector for correcting an input image signal, according to the output from correction gain calculator.

Abstract: In the plasma display apparatus, accidental discharge is prevented from occurring in a second discharge cell. For this purpose, in driving a plasma display panel having first data electrodes and second data electrodes that are arranged in parallel with the first data electrodes in a region outside the region where the plurality of first data electrodes are arranged, first voltage is set to be higher than second voltage in at least one subfield. Here, it is assumed that the first voltage is the voltage derived by subtracting the voltage applied to the first data electrodes from the voltage applied to the second data electrodes when down-ramp waveform voltage is applied to scan electrodes in the initializing period, and the second voltage is the voltage derived by subtracting the low-voltage-side voltage of the address pulse applied to the first electrodes from the voltage applied to the second data electrodes in the address period.

Abstract: Display luminance is uniformized and the brightness is enhanced. A plasma display device has image signal processing circuit including loading correction part. The loading correction part has: number of lit cells calculator for calculating the number of discharge cells to be lit in each display electrode pair, in each subfield; load value calculator for calculating a load value of each discharge cell, according to the calculation result in number of lit cells calculator; correction gain calculator for calculating a correction gain of each discharge cell, according to the position of the discharge cell and the calculation result in load value calculator, such that the correction gain is smaller in the central portion than in the peripheral portion on the plasma display panel's image display surface; and corrector for subtracting the multiplication result of the output from correction gain calculator and an input image signal, from the input image signal.

Abstract: A first ramp waveform (RW1) rising from a first potential (Vscn) to a second potential (Vscn+Vset) is applied to a plurality of scan electrodes (SCi) in a first period (t5 to t6), and a driving waveform dropping from a third potential (Ve1) to a fourth potential (0V) is applied to a plurality of sustain electrodes (SUi) before the first period (t5 to t6), and the plurality of sustain electrodes are held at the fourth potential (0V) in the first period (t5 to t6). At this time, a second ramp waveform (RW10) rising from a fifth potential (0 V) to a sixth potential (Vd) according to change of a potential of the first ramp waveform (RW1) is applied to a plurality of data electrodes (Dj) in a second period (t5 to t5a) that starts at a starting time point (t5) of the first period (t5 to t6) and is shorter than the first period (t5 to t6), thereby preventing generation of strong discharges between the plurality of data electrodes (Dj) and the plurality of scan electrodes (SCi).

Abstract: In a two-phase driving operation that is performed in at least a sub-field having a largest luminance weight, a first ramp waveform that drops from a first potential to a second potential is applied to a plurality of first scan 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 scan electrodes in a write period. The two-phase driving operation is employed to prevent a discharge failure during a write discharge.

Abstract: High image display quality is achieved when a 3D image is displayed on a plasma display panel (10). For this purpose, a driver circuit includes sustain pulse generation circuits (60) and (80), control signal generation circuit (45) for generating a shutter opening/closing timing signal and a control signal for controlling sustain pulse generation circuits (60) and (80), all-cell light-emitting rate detecting circuit (46) for detecting the all-cell light-emitting rate in each subfield, and partial light-emitting rate detecting circuit (47) for detecting the partial light-emitting rate in each of a plurality of regions set in an image display region of plasma display panel (10) in each subfield. The driver circuit corrects the number of sustain pulses to be generated set based on the image signal and luminance weight in each of the subfields in response to the all-cell light-emitting rate and the partial light-emitting rate.

Abstract: A stable address discharge in a plasma display device is generated without increased voltage to cope with increase in the cumulative current-carrying time of a panel with high luminance. A cumulative time calculating circuit for calculating cumulative current-carrying time of the panel and a driving circuit for driving the panel. The driving circuit delivers collected power to the display electrode pairs and clamps each voltage of the display electrode pairs to power-supply voltage and base potential. A sustain period has a period, during which the voltage of the display electrode pairs is clamped to base potential, between the sustain pulse for generating the last sustain discharge in the sustain period and the immediately preceding sustain pulse. The length of the period is changed according to the cumulative current-carrying time calculated by the cumulative time calculating circuit.

Abstract: In a plasma display panel apparatus, luminance when a display state of a panel is all-black is reduced. In a first period, in which a first ramp waveform dropping from a first potential to a second potential is applied to a plurality of scan electrodes, within a setup period, a second ramp waveform dropping from a third potential to a fourth potential is applied to a plurality of sustain electrodes in a second period in the case of not all-black, and a third ramp waveform dropping from the third potential to a fifth potential is applied to the plurality of sustain electrodes in a third period which is longer than the second period in the case of all-black. In addition, a scan pulse is not applied to the plurality of scan electrodes in a write period in the case of all-black.