I vaguely remember Rony and friends reversing the concept of the endoscope product they developed prior to have the moving fiber optic strand project light into the side of a lens which would channel the light and reflect it into eyes instead of capturing light and projecting it onto a light sensor in the case of the endoscope. Everything they did had fiber optic strands for RGB on that original idea. Having one color would have been an easier place to start. Nonetheless, it seems like they had other more difficult unrelated problems such as Vergence Accommodation Conflict.