Invention Grant
US08947604B2 Cholesteric liquid crystal writing tablet with spacer controlled sensitivity 有权
胆固醇液晶书写片具有间隔控制灵敏度

Cholesteric liquid crystal writing tablet with spacer controlled sensitivity
Abstract:
A cholesteric liquid crystal writing tablet includes a first substrate that is transparent and flexible on which a writing pressure is applied and a second substrate spaced apart from the first substrate. One electrically conductive layer is in contact with the first substrate and is transparent and another of the electrically conductive layers is in contact with the second substrate. The electrically conductive layers are separated from each other by a cell gap. Cholesteric liquid crystal material is disposed between the electrically conductive layers. Spacers are disposed in the liquid crystal material that control the cell gap. The spacers have a size and concentration in the liquid crystal material that restricts flow of the liquid crystal material when the cell gap is reduced upon application of the writing pressure.
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