Liquid crystal on silicon

A projection technology that uses miniaturized reflective active-matrix liquid-crystal display using a liquid crystal layer on top of a silicon backplane.

Liquid crystal on silicon (LCoS or LCOS) is a miniaturized reflective active-matrix liquid-crystal display or "microdisplay" using a liquid crystal layer on top of a silicon backplane. It is also referred to as a spatial light modulator. LCoS was initially developed for projection televisions but is now used for wavelength selective switching, structured illumination, near-eye displays, and optical pulse shaping. By way of comparison, some LCD projectors use transmissive LCD, allowing light to pass through the liquid crystal.

In an LCoS display, a CMOS chip controls the voltage on square reflective aluminum electrodes buried just below the chip surface, each controlling one pixel. For example, a chip with XGA resolution will have 1024x768 plates, each with an independently addressable voltage. Typical cells are about 1–3 centimeters square and about 2 mm thick, with pixel pitch as small as 2.79 μm. A common voltage for all the pixels is supplied by a transparent conductive layer made of indium tin oxide on the cover glass.

Liquid crystal on silicon
  • LCOS
also known as
  • D-ILA
  • How LCoS Works on
  • What's so hot about LCOS technology? on
  • Increasing Prevalence of Projectors during Mass-Audience Events driving the Global LCoS Market on
  • Fundamentals of phase-only liquid crystal on silicon (LCOS) devices on
  • Liquid Crystal on Silicon Market Size 2020 By Trends Evaluation, Leading Players Updates, Consumer-Demand, Consumption, Recent Developments, Strategies, and Forecast till 2026, Says Industry Research Biz on
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  • Image By Cantalamessa - Own work, Public Domain — from
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