A scan assembly of an image generator sweeps an image beam in a first dimension at a first rate and bi-directionally in a second dimension at a slower rate. Sweeping the beam bi-directionally in the vertical dimension (generally the dimension of the lower sweep rate) can reduce the scanning power by...http://www.google.de/patents/US20040004585?utm_source=gb-gplus-sharePatent US20040004585 - Apparatus and method for bi-directionally sweeping an image beam in the vertical dimension and related apparati and methods
