Patent ID: 8079718

Claim:
A small, light-in-weight, mobile projector, comprising: a source of light in the form of an RGB laser set; an optical combiner having a thin profile disposed in light-receiving relation to said source of light; a light illumination cavity having a thin profile disposed in light-receiving relation to said optical combiner; said light illumination cavity having a front surface through which collimated light is emitted; said optical combiner including at least two switchable liquid crystal layers disposed in light transmitting relation to one another; a polymer dispersion liquid crystal grating disposed in overlying relation to a preselected layer of said at least two switchable liquid crystal layers; said polymer dispersion liquid crystal grating providing phase modulation and de-speckling for light traveling therethrough; a transmissive spatial light modulation panel having a thin profile being disposed in light-receiving relation to said light illumination cavity; whereby light from said source of light is mixed by said optical combiner, collimated by said light illumination cavity, and illuminates said transmissive spatial light modulation panel in a thin space.