摘要:
When a gas discharge panel is driven, a voltage is applied between scan and address electrode groups to perform set-up. The voltage waveform has four intervals. In a first interval, the voltage is raised in a short time (less than 10 &mgr;s) to a first voltage, wherein 100 V≦first voltage
摘要:
Set-up, write, sustain and erase pulses are variously applied to a plasma display panel using a staircase waveform in which the rising or falling portion is in at least two steps. These staircase waveforms can be realized by adding at least two pulses. Use of such waveforms for the set-up, write and erase pulses improves contrast, and use for the sustain pulses reduces screen flicker and improves luminous efficiency. This is of particular use in driving high definition plasma display panels to achieve high image quality and high luminance.
摘要:
The present invention relates to a roll core holding device equipped with a roll core release mechanism which can facilitate to automatically and certainly release the empty roll core from a rotary printing machine. The roll core holding device for each end of a roll core comprises a shifting means; a center member capable of shifting owing to the shifting motion of the shifting means and consisting of a base section and a shaft section protruded from the base section; a plurality of pawls capable of shifting along the shaft section of the center member, arranged so as to widen the space between the pawls as they are shifted toward the base section; an urging means for the pawls toward the top of the shaft section; and a stopper secured at the top of the shaft section of the center member.