LUMINAIRE DEVICE

摘要

An optical device (10) for collecting light and selectively outputting or concentrating the light (24). A layer (12) has an optical index of refraction n1, and top (14), bottom (16) and side (18) surfaces defining an angle of inclination .phi.. A back surface (20) spans the top (14), bottom (16) and side (18) surface. A first layer (28) is coupled to the bott om surface (16) of the layer (12) and has an index of refraction n2, causes light input through the back surface (20) of the layer (12) to be preferentially output into the first layer (28). A second layer (30) is coupled to the bottom (16) of the first layer (28) and selectively causes output of light into ambient. Additional layers, such as a light polarization layer, a polarization converting layer and a post LCD diffuser layer can be used to make preferential use of polarized light of diffuse light having passed through the LCD layer to enhance viewing of the output light.