Burroughs, Inc.

James Y Lee

James A Ogle

Joseph E McKee

A system for operating a memory display panel comprising a gas-filled envelope having an array of D.C. gas discharge cells and an array of quasi A.C. gas discharge cells, there being one A.C. cell for each D.C. cell. The A.C. cells are the display cells of the panel and include electrode means which receive sustainer signals for sustaining glow therein, and the D.C. cells are operated in a scanning fashion to address selected A.C. cells in which glow is to be displayed. The system includes electronic circuitry for performing the above-mentioned operations of driving the D.C. cells, generating sustaining signals for the A.C. cells, and energizing the A.C. cells in accordance with input data information. Appropriate timing control circuits are also provided.

System for operating a display panel having memory

The disclosure is of a display panel which includes an array of scanning cells having scan anodes and scan cathodes, the anodes being connected to a source of electrical potential, and the scan cathodes being connected in groups, each group being connected to a driver. The driver comprises a plurality of integrated circuits connectible to provide different numbers of outputs, each of which is connected to one of the groups of cathodes. Means are provided for automatically connecting the cathodes in the desired number of groups and to connect the driver to provide the desired number of outputs.

Selectable phase driver for dot matrix display panel

An AC-powered display system includes a gas discharge display panel, an integrated circuit, and a limiting network. The integrated circuit is provided as the display pattern controller. The limiting network, in response to an excessive voltage across the controller, reduces the current through the system. The reduction in system current causes the voltage across the integrated circuit to be regulated.

AC-powered display system with voltage limitation

The disclosure is of a system for driving gas-filled segment-type display panels including a plurality of groups of cathode electrodes, each having an anode electrode. The circuit includes means for holding the anodes at a relatively low potential for a short period of time after drive signals are applied thereto and to selected cathode electrodes. During this period of time, current flow charges a capacitor and raises the potential of the anodes to a potential at which ionization and cathode glow can occur. The circuit includes transistors utilized as resistors to hold off cathodes which are not intended to glow.

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Kendall Park, NJ, United States of America

James Y Lee