Scrolling color sequential illumination system
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United States of America Patent
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-
Mar 23, 2004
Grant Date -
Jan 2, 2003
app pub date -
Jun 20, 2002
filing date -
Jun 21, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Illumination systems (11) are disclosed which provide scrolling progressive color change on a liquid crystal panel (21), such as a LCoS panel. The systems use transmissive color filters (30, 31, 33) which form an assembly (13) which is rotated about a rotation axis (37). Incident light from a light source (15, 17) passes through the filters and reflects from a reflecting surface (39). As a result of this reflection, the system's optical axis (41, 43) is turned from an orientation substantially perpendicular to the rotation axis to an orientation which does not intersect a filter. Such turning of the optical axis allows colored light to be easily removed from the assembly and avoids problems with color mixing at boundaries between filters as occurs for systems in which light passes through two filters.
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Cited Art Landscape
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