Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1978-04-14
1980-02-19
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340718, 340771, 340779, 340805, G06F 314
Patent
active
041897293
ABSTRACT:
A driving and addressing circuit for applying sustaining, writing and erasing voltages to the cells of a multicelled gas discharge display/memory panel. The voltage generating circuitry is isolated from each panel electrode by a pair of oppositely poled diodes individual to that electrode. The diodes provide low impedance paths for the sustainer current and isolate the electrodes from each other. The writing and erasing voltages are coupled to the electrodes through a plurality of complementary MOSFETs, one per electrode, which eliminate all but one of the diode switch circuits per electrode array of the prior art circuitry. The P-channel and N-channel MOSFETs can be formed on separate integrated circuit chips with one of the pair of the diodes while the other diodes are formed on common anode and common cathode integrated circuit chips. In addition, a portion of the addressing circuitry can be formed on the MOSFET chips. Such a circuit configuration substantially reduces the power requirements and circuit complexity.
REFERENCES:
patent: 3840779 (1974-10-01), Schermerhorn
patent: 3953762 (1976-04-01), Iwakawa et al.
patent: 4027196 (1977-05-01), Criscimagna et al.
patent: 4070600 (1978-01-01), Butler et al.
patent: 4072937 (1978-02-01), Chu
Baker Theodore C.
Johnson William E.
Birchall David R.
Click Myron E.
Curtis Marshall M.
Owens--Illinois, Inc.
Wilson David H.
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