Self-stabilized electrophoretically frustrated total internal reflection display
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United States of America Patent
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Mar 8, 2005
Grant Date -
Jul 15, 2004
app pub date -
Jul 24, 2003
filing date -
Jul 30, 2002
priority date (Note) -
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Abstract
An image display has a transparent front sheet with a prismatically microstructured inward surface and a rear sheet substantially parallel to and spaced from the front sheet. An electrophoretic suspension fills the space between the sheets. The suspension is formed by suspending non-light-scattering light absorptive particles in an electrophoresis medium until the particles form a substantially unitary thermodynamically stable agglomeration. Application of a voltage across the suspension establishes an electric field for controllably electrophoretically moving the particle agglomeration as a substantially unitary whole toward the front sheet's inward surface to frustrate total internal reflection at the inward surface of light rays passing through the front sheet.
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