Reflective LCOS displays utilizing novel polarizing beam splitters
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United States of America Patent
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Mar 27, 2012
Grant Date -
Jul 8, 2010
app pub date -
Jan 8, 2010
filing date -
Jan 8, 2009
priority date (Note) -
Expired
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Abstract
Disclosed are display systems using reflective liquid-crystal microdisplays that efficiently use unpolarized light sources without needing to double the étendue of the source as occurs with conventional polarization conversion systems. Furthermore, the display systems can utilize on-axis projection lenses, and fast-switching ferroelectric-liquid-crystal-on-silicon (FLCOS) microdisplays. The systems utilize beam splitters that split unpolarized incident light into two diverged beams of opposite polarization. Ferroelectric liquid crystal display elements are combined with fixed retarders to enable an element that can selectively flip or not flip the handedness of incident circularly polarized light.
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