Method and system for automatically inspecting a display including a layer of liquid crystal material
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United States of America Patent
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Issued Date -
Apr 5, 2007
app pub date -
Sep 30, 2005
filing date -
Sep 30, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system and method are provided to rapidly inspect Liquid Crystal On Silicon (i.e., LCOS) displays to identify non-uniform cell gaps. The system includes a light source, a single polarized optical filter, and a color camera. The image acquired by the camera is analyzed to find variations in color. Excessive variations in color are used to identify excessive variations in the cell gap of the LCOS display. The arrangement of the components of the system does not require great precision and the analysis can be done very quickly.
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