Abstract:
A method for driving a plasma display panel including discharge cells formed at the intersections of the scan electrodes, maintaining electrodes, and data electrodes. One field consists of a plurality of sub fields, each having an initialization period, a write period, and a maintaining period. The maintaining period of at least one sub field has a first maintaining period during which the maintaining pulse has a first rise time and a second maintaining period during which the maintaining pulse has a second rise time shorter than the first rise time. The second maintaining period includes at least the final period of the maintaining period.
Abstract:
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.
Abstract:
PROBLEM TO BE SOLVED: To provide an antenna device capable of increasing a band width easily.SOLUTION: An antenna device in which element tips 100 of respective two elements 10a and 10b in a folding dipole antenna with parallel lines having short-circuited both ends and a certain interval therebetween are folded in a vertical direction and a horizontal direction comprises: a slot 105 provided by making one of two elements 101 and 103 at both ends parallel to each other a conductor surface 104, in which neighbouring three elements 101 to 103 included in the elements 10a and 10b make a U-shape; a feeding terminal 20 connected to a high frequency power supply 40; a ground terminal 30 connected to a ground 50; and a reactance element 60 provided between an element 106 facing the feeding terminal 20 or the ground terminal 30 and the feeding terminal 20 or ground terminal 30. The reactance element 60 can form a new resonance route so that a band width can be increased easily.
Abstract:
PROBLEM TO BE SOLVED: To provide an induction heating cooker capable of preventing damages to an electronic component and cooking stably. SOLUTION: The induction heating cooker includes an induction heating coil 23 for generating a high-frequency magnetic field; a power switching element 25 for making high frequency current conduct to the induction heating coil 23; a drive circuit 27 for driving the power switching element 25; a thermistor 26 for detecting the temperature of the power switching element 25; and a control means 28 for controlling the output of the power switching element 25 to the drive circuit 27 by means of output of the thermistor 26. The control means 28 estimates the temperature of the power switching element 25 from the change in the output of the thermistor 26 at a designated time, and stable cooking performance can be attained, by controlling the drive frequency of the power switching element 25 so as to lessen loss of the power switching element 25, when the estimated temperature is at a fixed value or higher, while preventing damages to the power switching element and surrounding electronic components. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To generate a stable writing discharge while securing a sufficient voltage setting margin to obtain an image of high display quality. SOLUTION: This method for driving a plasma display panel is provided with a plurality of discharge cells each having a scanning electrode, a maintenance electrode and a data electrode. In an initialization period, either a compulsory initializing operation which generates an initialization discharge regardless of an operation of an immediately-previous subfield, or a selection initializing operation which generates the initialization discharge only by the discharge cells which have generated writing discharges in an immediately-previous writing period is executed. First voltages are applied to the maintenance electrodes, ascending slope waveform voltages are applied to the scanning electrodes, and descending slope waveform voltages are then applied to the scanning electrodes. After that, positive rectangular voltages are applied to the scanning electrodes, and the descending slope waveform voltages are then applied to the scanning electrodes, and then second voltages higher than the first voltages are applied to the maintenance electrodes, and the descending slope waveform voltages are applied to the scanning electrodes to conduct the selection initializing operation. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To achieve high light mission efficiency while making the display luminance of a plasma display panel uniform to secure high quality. SOLUTION: A method for driving a plasma display panel drives a plasma display panel which composes one field by using a plurality of subfields each having an initialization period, a writing period and a maintenance period, and is provided with a plurality of discharge cells having scanning electrodes, maintenance electrodes and data electrodes where the data electrodes are divided into a plurality of groups, and voltages are individually applied to the data electrodes in group units in the maintenance period of a prescribed subfield. COPYRIGHT: (C)2011,JPO&INPIT