3D kernel and prism assembly design
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United States of America Patent
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Mar 25, 2008
Grant Date -
Jan 12, 2006
app pub date -
Jun 29, 2005
filing date -
Jul 12, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A Liquid Crystal on Silicon (LCOS kernel for a light engine is configured in a kernel having light paths in three dimensions (3D kernel). The 3D kernel allows for designs that do not require Wavelength Dependent Waveplates (WDWs) (or Wavelength Specific Retarders) for managing light polarizations within the 3D kernel. In one embodiment, the 3D kernel includes a Polarizing Beam Splitter (PBS) that is positioned to direct lightpaths within the 3D kernel in the 3.sup.rd dimension (e.g., light path planes perpendicular to planes of input light provided to the 3D kernel). The 3.sup.rd dimension is, for example, an output light path perpendicular to an input light plane. The 3D kernel allows for designs that incorporate reflective LCOS microdisplays and management of light paths without WDWs. The kernel is suitable for use in High Definition (HD) LCOS Rear Projection Televisions (RPTVs) and other projector applications.
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