Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1979-12-10
1983-05-24
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340767, 358240, G09G 328
Patent
active
043852939
ABSTRACT:
A circuit for use with an AC plasma panel to cause gray shade or brightness variation at the discrete points on a displayed rastor by varying the number of emitted light pulses within a flicker period. The gray scale range is divided into a predetermined number of levels, each of which corresponds to a particular gray shade. The gray shade level for all of the discrete points along a row of rastor information is stored in binary form in recirculating shift registers. All of the points along each column are addressed simultaneously and the data bits from the recirculating shift registers are used to clock either erase pulses, write pulses, as the case may be, to all of the rows simultaneously as each column is sequentially addressed. Accordingly, by addressing all of the row electrodes simultaneously, all of the discrete sites can be addressed a sufficient number of times within a flicker period to minimize any rastor flicker.
REFERENCES:
patent: 3590156 (1971-06-01), Easton
patent: 3601532 (1971-08-01), Bitzer et al.
patent: 3733435 (1973-05-01), Chodil
patent: 3937878 (1976-02-01), Judice
Curtis Marshall M.
Lange Richard P.
United Technologies Corporation
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