| 摘要 |
A system for controlling light propagation in a multiple tube display. Each tube has a pair of electrodes disposed at opposite positions, one of which is excited. Control means excites one of the electrodes of a first tube at a variable increasing power level to cause light intensity to sweep therethrough. A second control circuit controls excitation of one of the electrodes of the other tube to provide a variable increasing power level to cause light intensity to sweep therethrough.
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