Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1980-12-30
1984-05-15
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340736, 340735, G09G 114
Patent
active
044491247
ABSTRACT:
With a directed beam imaging system, a method is presented employing a low-pass filter in the positional signal path, a time-discrete positional signal, and precompensation of this time-discrete signal for phase and amplitude errors of the overall positional control circuitry. As a consequence of this method, the uncompensatable vector nonlinearities of the prior art vector stroke are obviated, the useable system bandwidth or stroke per unit time is extended beyond the prior art to the maximum driveable frequency, and in many text and graphics applications fewer strokes are needed to produce the desired image.
REFERENCES:
patent: 3333147 (1967-07-01), Henderson
patent: 3364479 (1968-01-01), Henderson et al.
patent: 3437869 (1969-04-01), Cobb et al.
patent: 3540032 (1970-11-01), Criscimagna et al.
patent: 3659282 (1972-04-01), Tada
patent: 3786482 (1974-01-01), Puckett, Jr. et al.
Curtis Marshall M.
Henderson, Jr. John W.
International Business Machines Corp.
Lefeve Douglas H.
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