Variable color electrooptic display
AssigneeMotorola, Inc.
InventorGene H. Haertling
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AssigneeMotorola, Inc.
InventorGene H. Haertling
Estimating the term…
An electrooptic color display for displaying selectable indicia includes a ferroelectric ceramic element, such as a PLZT material, first and second polarizers on each side of the element, and a mechanism for selectively inducing a transverse electric field at selectable areas on the element, said areas corresponding to the indicia. The electric field can be produced by applying a voltage to transparent interleaved electrodes on one or both surfaces of the ceramic element. These areas produce spectrally selective phase retardation which causes the color of the indicia to be different from that of the background color. Preferably a separate retardation element which may be fixed, variable, or a combination of both, is disposed between the polarizers to provide a fixed color bias that determines the background color. This invention contemplates transmissive, reflective, and transflective color displays.
A method for creating selectable indicia of a first color and a second background color comprising the steps of:
An electrooptic display having selectable indicia of a first color and a background of a second color different from the first color comprising:
Dependencies are inferred from the claim text.