Patent ID: 8152303
Filing Date: 2012-04-10
Classification: G03B,H04N

Abstract:
1. In a projection system including a light projected image beam for projecting stereographic image data, the image data comprising a plurality of image streams each comprising frames wherein the projection system alternately projects frames from each of the image streams, the improvement comprising: a rotating polarizing filter wheel disposed in a path of the image beam and synchronized so that frames from a corresponding one of the projected image streams passes only through one type of polarization angle region, of a plurality of types of polarization angle regions located on the filter wheel, during rotation of the filter wheel; and a motor drive system coupled to the filter wheel for periodically accelerating and decelerating its rotational speed, wherein the motor drive system includes a drive voltage waveform generator that outputs a periodic drive voltage that is superimposed over/combined with a reference/steady state/quiescent drive voltage of the motor drive system, and wherein the drive voltage waveform generator comprises one or more stored cycles of a bipolar truncated exponential waveform that is repetitively triggered for output and whose frequency and amplitude are separately controllable.