摘要:
A PDP driving method that reduces the reset voltage of the PDP driving waveforms to make it possible to use low-voltage elements and to achieve high contrasts is disclosed. Since conventional PDP waveforms require very high reset voltages, it causes a problem of intense background light emissions, low contrasts, use of high-voltage components, and increased circuit costs. According to the driving waveforms of the present invention, relative voltage differences between the address electrode and the X electrode and between the X electrode and the Y electrode are considered to design waveforms of low reset voltages, thereby providing high contrasts and low-cost circuit.
摘要:
A PDP driving method that reduces the reset voltage of the PDP driving waveforms to make it possible to use low-voltage elements and to achieve high contrasts is disclosed. Since conventional PDP waveforms require very high reset voltages, it causes a problem of intense background light emissions, low contrasts, use of high-voltage components, and increased circuit costs. According to the driving waveforms of the present invention, relative voltage differences between the address electrode and the X electrode and between the X electrode and the Y electrode are considered to design waveforms of low reset voltages, thereby providing high contrasts and low-cost circuit.
摘要:
The collector, emitter, and base of a bipolar transistor circuit are connected to a high side power supply terminal, the drain of a level shift transistor, and a floating power supply terminal, respectively. When a high side output transistor is on, the floating power supply terminal is at the potential of a high potential power supply terminal. The high side power supply terminal is at a potential higher than the potential of the floating power supply terminal by a constant voltage. Turning the level shift transistor on, its drain potential drops below the potential of the floating power supply terminal; The base current flows through the bipolar transistor circuit and the drain potential of the level shift transistor is clamped near the potential of the floating power supply terminal; The bipolar transistor circuit is turned on and its collector current supplies the drain current of the level shift transistor.
摘要:
A video display monitor, such as a plasma monitor, which uses a subfield method which overlaps weighted multiple binary video images in a time base for display. The stable driving of a plasma display panel may be assured and display in the 256 grey-level may be maintained although vertical synchronizing frequency of the input video signal changes. A vertical synchronizing measurement unit measures the vertical synchronizing frequency of the video signal, and a subfield number adjustment unit adjusts the number of subfields in accordance with a measured vertical synchronizing frequency. The stable driving of the plasma display panel and display in grey levels may be assured by selecting a ROM table with an output bit width equivalent to the number of subfields to be output from multiple ROM tables used for converting the number of bits in the input signal.
摘要:
In a memory drive system of a DC type of plasma display panel, scan signals are applied to scan electrodes connected to the DC type of plasma display panel, with the scan signals each comprising a priming scan pulse for generating the priming discharge, a write scan pulse for generating the write discharge, and a sustain pulse train for generating the sustain discharge. The priming scan pulse, the write scan pulse and the sustain pulse train are sequentially shifted on a time basis for each scan signal. To each of the data electrodes connected to the DC type of plasma display panel, a data signal is applied in which, only when the write discharge is not to be generated, is a non-write pulse formed, which offers a turn-off level during an applying period of time for the write scan pulse, and which maintains a turn-on level when the write discharge is to be generated and during other periods of time except the applying period of time for the write scan pulse.
摘要:
A display panel driving circuit in which a substantial portion of the power dissipation is in the portion of the circuit located off of the integrated circuit. A level shift circuit converts a high level of a signal S2 to a low level, converts a low level of the signal S2 to a high voltage VH level, and outputs a signal S2'. A transistor XSC connects output an terminal HVO1 to ground when signal S2 is at the high level. A transistor XSU is maintained in a nonconductive state when the output of the level shift circuit is low level and connects an output terminal HVO1 to an external signal input terminal VSU when the level shift circuit is at the high voltage VH level. A transistor XSD connects output terminal HVO1 to an external signal input terminal VSD when a signal S3 is at the low level and a signal S3' is at the high level; XSD is maintained in the nonconductive state when signal S3' is at the low level.
摘要:
A plasma display panel includes stripe-like anodes and barrier ribs on an upper face plate, first sustaining electrodes over the inner surface of a lower rear plate, and stripe-like cathodes on the first sustaining electrodes insulated from the first sustaining electrodes by interposing layers. The stripe-like cathodes are respectively connected to external capacitors via a common node and serve as second sustaining electrodes. In a driving method of the panel, the first sustaining electrode is supplied with a pulse varying from ground potential to a first positive potential, from the positive potential back to ground potential, and then from ground potential to a first negative potential. The second sustaining electrode is supplied with a pulse varying from ground potential to the first negative potential, from the first negative potential back to ground potential, and then from ground potential to the first positive potential. The anode is supplied with a writing pulse varying from a third positive potential to a fourth positive potential for data writing when the pulses of the first and second sustaining electrodes are both at ground potential. The cathode is supplied with a negative scanning pulse varying from a third negative potential to a fourth negative potential. The cathode is supplied with a negative erasing pulse having an amplitude equal to the different between the third and fourth potentials for erasing the written data after a predetermined time has elapsed. Thus, the durability of the plasma display panel can be improved.
摘要:
A driving method for a gas discharge display panel especially of a large size. The invention uses a gentle rise-up waveform or stepwise rise-up waveform of the sustaining pulse to allow a more operational margin while not increasing load to the driving circuit.
摘要:
A method and circuit for driving scan line in plasma panel is disclosed for dividing scan line of n-numbered cathode in two such that left side of scan line is constructed as a first group of even numbered cathode, and right side of scan line is as a second group of odd numbered cathode. There is provided a separate cathode driver and signal generation and processing portion with both first and second group of cathode. One picture of plasma panel is driven with two fields in an interlacing manner in that the conventional scanning frequency of 60 Hz is divided in two.
摘要:
The dot matrix plasma display of the present invention comprises a plurality of parallel cathode strips mounted on the upper surface of a dielectric substrate. A glass plate is sealingly engaged over the upper surface of the substrate in spaced relation thereto so as to form an envelope therebetween. The undersurface of the glass plate includes a plurality of anode strips which extend in a direction parallel to one another and perpendicular to the cathode strips located on the substrate below. A dielectric film is printed over the cathode strips and includes a plurality of apertures therein which correspond to the junctures between the anode strips and the cathode strips, these junctures forming a dot matrix. Ionizable gas is contained within the envelope and is adapted to glow adjacent the junctures of any simultaneously actuated anode and cathode strips.The method for driving the dot matrix plasma display includes actuating the cathode strips one at a time sequentially. Simultaneously with the actuation of each cathode strip, a pre-selected combination of anodes are also actuated so as to cause the gas to glow adjacent the junctures between the actuated anodes and cathode strips. The cathode strips are scanned at a frequency which to the human eye gives the appearance that they are constantly actuated.