a projector includes a laser source , a collimate lens , a deflection reflector , and a deflection controller coupled to the deflection reflector . the laser source generates a laser beam , which transmits through and is converted by the collimate lens into a collimated laser beam , which is then directed toward the deflection reflector . the deflection reflector , under the control of the deflection controller , projects the collimated laser beam to a liquid crystal panel or a digital micro - reflector element in a scanning manner so as to induce an image , which is then projected to a projection display screen .