Patent ID: 6067127
Filing Date: 2000-05-23
Classification: G02B,H04N

Abstract:
A display apparatus comprising:a viewing surface;a laser light source for producing a laser beam with a modulated intensity;a first rotating mirror for reflecting said laser beam and scanning said beam through a range of vertical angles at a first rotation rate;a second rotating mirror comprised of a plurality of reflective faces for receiving said laser beam reflected from said first rotating mirror through said range of vertical angles on a first reflective face and for reflecting said laser beam and scanning said beam through first and second ranges of horizontal angles in respective first and second rotational periods at a second rotation rate;a first fixed mirror for receiving said beam reflected through said first and second ranges of horizontal angles, for reflecting said beam in said first range of horizontal angles during said first rotational period toward the first face of said second rotating mirror, whereby said beam is reflected from said first face of said second rotating mirror toward said viewing surface and for reflecting said beam in said second range of horizontal angles during said second rotational period through a third range of horizontal angles;a second fixed mirror for receiving said beam reflected through said third range of horizontal angles and for reflecting said beam toward a second face of said second rotating mirror, whereby said beam is reflected by said second face of said second rotating mirror and scanned through a fourth range of horizontal angles; anda third fixed mirror for receiving said beam reflected through said fourth range of horizontal angles and for reflecting said beam toward said viewing surface, whereby rotation of said second rotating mirror causes said beam to scan across said viewing surface once during said first rotational period and once during said second rotational period.