Electronically compensated LCD assembly
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United States of America Patent
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Mar 2, 2010
Grant Date -
Apr 19, 2007
app pub date -
Oct 17, 2006
filing date -
Oct 18, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method of electronic contrast enhancement for an LCD panel for use in an imaging device. The method comprises the step of coupling the LCD panel with a trim retarder in a pre-determined azimuthal orientation for at least partially compensating the residual in-plane retardance, followed by the step of non-mechanical fine-tuning of a dark state of the LCD panel. In the preferred embodiment, the fine-tuning of the dark state of the LCD panel is realized by adjusting the dark-state magnitude of the LC voltage. The method can be used in batch, e.g. wafer-level manufacturing of integrated trim retarder/LCD panels assemblies that can be electronically tuned to provide high on/off contrast.
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