Transmissive technology is based on LCD Poly-Silicon panels with an array of pixel “windows” through which light transmission can be controlled using polarized LCD. The light source is a high-brightness metal-halide lamp or similar, radiating almost pure white light. The light beam is split into the three primary colours – red, green and blue – using dichroic filters. It then passes through LCD panels (one for each primary colour), thus controlling the amount of red, green and blue light in each individual pixel. The light beams are then re-converged using prisms and mirrors before being projected through the lens.