A Forth Dimension Displays microdisplay is a highly reflective Liquid Crystal on Silicon (LCOS) device. The very high switching speed of our liquid crystal enables rapid light modulation to create colour and grey scale with no spatial beam separation, no sub-pixels and no tilting mirrors.
The "in-plane" switching of the optical axis of the LC film provides for excellent viewing angles and enables simple optical architectures (see Optical Principle). Together with our wide range of drive electronics the end user is given the flexibility to choose a mode of operation to suit their application.
The LCOS device comprises of two substrates. The first is a pixilated silicon-based CMOS substrate (backplane), which serves as both the active matrix to drive individual pixels and as a mirror, and the second, is a front glass substrate. Between the backplane and the front glass substrate is the liquid crystal material, which serves as the medium for light modulation.