1. Liquid Crystal on Silicon

2. Liquid crystal on silicon
Liquid crystal on silicon (LCoS or LCOS) is a "micro-display" technology developed initially for projection televisions but now used also in Wavelength Selective Switches, structured illumination and Near-eye displays. It is a reflective technology similar to DLP projectors; however, it uses a liquid crystal layer on top of a silicon backplane instead of individual mirrors. By way of comparison, some LCD projectors use transmissive LCD, allowing light to pass through the liquid crystal.

3. Liquid crystal on silicon
This conceptual drawing of a Liquid Crystal on Silicon cell with the vertical dimension exaggerated to reveal the different layers

4. Wavelength selective switching - Liquid Crystal on Silicon (LCoS)
Liquid Crystal on Silicon LCoS is particularly attractive as a switching mechanism in a WSS because of the near continuous addressing capability, enabling much new functionality

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