Abstract:
PROBLEM TO BE SOLVED: To solve the problem that a high-definition PDP is unable to perform image display normally due to a writing operation defect, which is caused by forcible discharge generation in an initialization period and discharge interference between adjacent cells. SOLUTION: In the plasma display device, groups of agglomerated grains consisting of agglomerated crystal grains of metal oxides are arranged on the periphery of a protective layer 18, and image display is performed by driving the device by a drive system comprising, in the initialization period, the first half portion of the initialization period of applying voltage boosting gently from a first voltage to a second voltage to a second electrode and a second half portion of the initialization period of applying voltage dropping gently from a third voltage to a fourth voltage to the second electrode. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To solve the problem that an image cannot be correctly displayed, since a write operation failure arises due to intensive discharge generation, discharge interference between adjoining cells, and discharge delay on writing operation time. SOLUTION: A plasma display device includes a crystal particle layer which is formed from MgO monocrystals having a cathode luminescence light emission spectrum of desired characteristic and which is arranged on a periphery of a protection layer. The device performs image display by a drive method having a first half of the initialization period during which a voltage slowly increasing from a first voltage to a second voltage is applied to a second electrode and a second half of the initialization period during which a voltage slowly decreasing from a third voltage Vc1 to a fourth voltage Vd1 is applied to the second electrode. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a driving method for stably generating a writing discharge even in a plasma display panel which has a larger screen and higher definition.SOLUTION: In an initialization period of at least one subfield in one field period, a first gently rising ramp waveform voltage is generated in a scan electrode, and at the end of a sustain period, a second ramp waveform voltage steeper than the first ramp waveform voltage is generated in the scan electrode, and a sustain electrode is at floating potential.
Abstract:
PROBLEM TO BE SOLVED: To make it possible to stably generate writing discharge even in a plasma display panel which has a large display surface and is finely defined.SOLUTION: A drive circuit of a plasma display device applies a first inclined wave form voltage increasing gradually to a scanning electrode during an initialization period of time of at least one subfield, and applies a second inclined wave form voltage increasing more abruptly than the first inclined wave form voltage to the scanning electrode at the end of the holding period of time. Floating voltage is generated in a holding electrode or in a data electrode from the beginning of fall of holding pulse applied at the end of the holding period of time until the completion of application of the second inclined wave form voltage.
Abstract:
PROBLEM TO BE SOLVED: To stably generate writing discharge, even in a further high-definition plasma display panel having a larger screen.SOLUTION: A plasma display device includes a plasma display panel and a sustain pulse generating circuit, wherein a first gently rising ramped waveform voltage is applied in the initializing period of at least one sub field in one field period, a sustain data pulse is applied to a data electrode after completion of the writing period until a sustain pulse in the sustain period is applied, and a second ramped waveform voltage, having a gradient steeper than that in the first ramped waveform voltage and falling after the rising waveform voltage reaches a predetermined potential is generated in the end of the sustain period.
Abstract:
PROBLEM TO BE SOLVED: To achieve a plasma display panel which has high-definition and high-luminance display performance and low power consumption. SOLUTION: The invention relates to a plasma display device wherein one field is constituted of a plurality of subfields, and each subfield is provided with an address period for selecting a discharge cell for emitting light. A base film of a protective layer is formed at least of two or more metal oxides selected from magnesium oxide, calcium oxide, strontium oxide, and barium oxide and, in an X-ray diffraction analysis, a peak is present between a minimum diffraction angle and a maximum diffraction angle produced by a single body of the oxide constituting the metal oxide of a specific orientation plane. Further, in one field, the number of times of discharge of the first subfield is the smallest, and the number of times of discharge of the second subfield is larger than that of any one of the third and subsequent subfields. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To achieve a plasma display panel which has high-definition and high-luminance display performance and low power consumption. SOLUTION: The invention relates to a plasma display device wherein one field is constituted of a plurality of subfields, and each subfield is provided with an address period for selecting a discharge cell for emitting light. A base film of a protective layer 9 of the PDP is formed at least of two or more metal oxides selected from magnesium oxide, calcium oxide, strontium oxide, and barium oxide and, in an X-ray diffraction analysis, a peak is present between a minimum diffraction angle and a maximum diffraction angle produced by a single body of the oxide constituting the metal oxide of a specific orientation plane. Of the time before the address period is started in each sub-field, the maximum value in one field is ≥200 μs. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a plasma display device of good image display quality that is capable of stably generating writing discharge and maintenance discharge. SOLUTION: One field comprises a plurality of subfields. A drive means is provided for driving a panel while providing a writing period for selecting discharge cells that are caused to emit light in the subfields and a maintenance period for generating a maintenance discharge by applying maintenance pulses to the display electrodes of the selected discharge cells in an alternate fashion and in a number matching brightness weights. As the maintenance pulses, a first maintenance pulse P1 and a second maintenance pulse P2 which trails more slowly than the first maintenance pulse P1 and which generates a discharge at this trailing part are provided. Of the plurality of subfields, at least the final subfield with large brightness weight is such that in the rear part of the maintenance period of the final subfield, the second maintenance pulse P2 is applied to the display electrodes. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To stably generate a write discharge even in a plasma display panel which has a large screen and high definition. SOLUTION: The plasma display panel generates a first ramped waveform voltage which gently rises in an initialization period of at least one sub-field in one field period, generates a second ramped waveform voltage which has a steeper gradient than the first ramped waveform voltage and which immediately falls once the rising waveform voltage reaches a predetermined potential in the ending of a sustain period, and alternately generates at least two kinds of sustain pulses, i.e. a first sustain pulse which varies from a base potential to a first potential and then falls to the base potential, and a second sustain pulse which varies from the base potential to the first potential and then falls to a second potential and further falls to the base potential in the sustain period. The second sustain pulse is generated right before the second ramped waveform voltage. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To uniformize display luminance of respective discharge cells, by reducing an after-image phenomenon itself. SOLUTION: A method is provided for driving a panel having a plurality of discharge cells having a scan electrode and a sustain electrode. One field period is constituted by arranging a plurality of subfields each having an initialization period for generating initialization discharge by the discharge cells, a write period for generating write discharge by the discharge cells and a sustain period for emitting the light by the discharge cells by alternately applying a sustain pulse onto the scan electrode and the sustain electrode. The sustain pulse is either a first sustain pulse for generating a light emission with one peak in the discharge cell or a second sustain pulse for generating a light emission with two peaks in the discharge cell. The rise time of the second sustain pulse applied onto the scan electrode and the rise time of the second sustain pulse applied onto the sustain electrode are set independently of each other based on the percentage of the discharge cells in which the light is emitted during the sustain period of the subfield. COPYRIGHT: (C)2009,JPO&INPIT