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AssigneeKent State University
InventorsXiao-Yang Huang, Philip J. Bos, Deng-Ke Yang
Estimating the term…
A flat-panel liquid crystal display. The display includes a flat sheet of bistable chiral nematic liquid crystal material activated by a drive circuit that individually controls the display state of multiple picture elements at a refresh rate 1000 scan lines per second. The driver circuitry activates the liquid crystal domains into homeotropic states over a relatively long activation period and then, during a short (.about.1 msec.) selection period, either keeps the domains in a homeotropic state or initiate a transition to the transient twisted planar state. The drivers then activate the domains in an evolution phase to provide either focal conic or twisted planar end states across the two-dimensional array of picture elements.
A method of addressing a bistable chiral nematic liquid crystal material disposed between electrodes arranged on opposed sides of said liquid crystal and adapted to selectively apply an electric field through said liquid crystal material, said method comprising the steps of energizing said electrodes to establish a preparation voltage across said liquid crystal during a preparation phase, thereafter energizing said electrodes to establish a selection voltage across said liquid crystal during a selection phase for selecting a final display state for said liquid crystal, next energizing said electrodes to establish an evolution voltage across said liquid crystal during an evolution phase, and thereafter permitting said liquid crystal to exhibit the final display state.
A method for displaying information comprising the steps of:
A display apparatus comprising:
Dependencies are inferred from the claim text.