Patent ID: 6155687
Filing Date: 2000-12-05
Classification: G02B,G03B

Abstract:
An apparatus for synchronizing frame sequential color image data and color modulated light propagating from a color modulation device, comprising:a light source emitting polychromatic light that propagates along an optical path and otherwise wasted light that propagates adjacent to the optical path;a color modulation device positioned generally along the light path to change the polychromatic light into color modulated light and the wasted light into color modulated sensing light;a light guide receiving the color modulated sensing light and propagating the color modulated sensing light out an exit surface of the light guide;a photo detector positioned to receive the color modulated sensing light exiting the light guide, the photo detector causing generation of a timing mark signal in response to receiving predetermined wavelengths of the color modulated sensing light; anda display controller generating the frame sequential color image data in response to receiving the timing mark signal.