Burroughs, Inc.

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George E Holz

David A Parisi

A display panel comprising a matrix of D.C. scan cells arrayed in rows and columns and a matrix of A.C. display cells arrayed in rows and columns, each scan cell being in operative relation with two display cells so that for every column of scan cells there are two sets of display cells. The panel also includes two sets of sustainer electrodes associated with the two sets of display cells and properly operated by complementary oppositely phased sustaining signals in conjunction with the scan cells to select and turn on desired display cells, column by column. Also disclosed is a circuit for generating the two oppositely phased sustainer signals for the two sets of sustainer electrodes.

Gas-filled dot matrix display panel and operating system

The disclosure is of a system for operating a dot matrix display panel including elongated anodes and cathodes oriented transversely to each other to define columns of D.C. scanning cells. An array of quasi A.C. display cells is provided spaced from the D.C. scan cells by an apertured electrode plate. Operation of the D.C. scan cells to transfer glow from a scan cell to an associated display cell is achieved by momentarily turning off the scan cell by the application of a negative pulse to its anode. To prevent the coupling of this pulse to adjacent anodes and spurious operation of adjacent scan cells and display cells, a counter-balancing positive pulse is applied to all anodes. The preferred coupling circuitry includes coupling capacitors which can pass both of these positive and negative pulses.

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Scotch Plains, NJ, United States of America

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