SCANNED DISPLAY WITH PLURALITY OF SCANNING ASSEMBLIES

摘要

A display apparatus includes a scanning assembly that scans about two or more axes, typically in a raster pattern. A plurality of light sources (50) emit light from spaced apart locations toward at least two scanning assemblies (not shown) such that the scanning assembly simultaneously scans more than one of the beams. The scanning assembly includes a plurality of mirrors that sweep their respective beams through respective regions (1092, 1096) of an image field (1094). The regions are immediately adjacent so that an overall image is produced by "tiling" of the regions. Because sweeps of the scanning assembly scan a plurality of tiles simultaneously the resolution and/or field of view of a display for a given scan angle and mirror size is increased relative to a single mirror sweeping a single beam. In alternative embodiments, tiling is used for imaging. Also, various approaches to controlling the frequency responses of the various scanners are described, including active control of MEMs scanners and passive frequency tuning.