A scanning mechanism of one embodiment of the invention is disclosed that includes light-emitting units, an integrating detector, and pulse-width modulated (PWM) drivers. Each light-emitting unit can emit colored light corresponding to a color of a color space. The integrating detector can detect the...http://www.google.com.au/patents/US7102801?utm_source=gb-gplus-sharePatent US7102801 - Pulse-width modulated drivers for light-emitting units of scanning mechanism
