Adaptive Vector End Timing Control
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
This article describes a circuit for minimizing intensity variations at vector endpoints in dynamically refreshed displays, minimizing vector generator overhead for very short vectors, and providing dot-size modulation for stored displays. This circuit adapts beam on/off delay times to vector length up to the point where vector length produces constant beam movement rates. Calligraphic (line-drawing) displays exhibit a kind of "inertia" in operation. Beam movement lags beam positioning input signals, with the amount of lag depending largely upon acceleration and deceleration rates. The "inertia" analogy does not hold at constant beam velocities, however, because input-to-deflection lags exist at constant velocities as well as at varying rates.