Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1980-09-18
1983-01-18
Trafton, David L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340739, G09G 110
Patent
active
043694411
ABSTRACT:
A random refresh vector-generator type display system using a hybrid digital/analog vector generating technique. A digital vector generator decomposes medium length vectors into sub-vectors which are then drawn by an analog vector generator including a delay line. The system utilizes a long vector drawing technique wherein the first portion of a long vector is drawn at a first speed, the middle portion is drawn at a greater speed, and the final portion is drawn at the first speed. A feed forward circuit compensates for the sluggish response of deflection amplifiers of a display monitor so as to more precisely define beginning and end points of vectors. These amplifiers are further compensated by a delta theta circuit which temporarily freezes the system clock to allow the amplifier time to settle so that successive vectors will form sharp corners.
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