Kent Displays, Inc.

Oleg Pishnyak

Liang-Chy Chien

Asad Aziz Khan

Joseph W Doane

Irina Shiyanovskaya

Tod L Schneider

Forrest Nicholson

Seth E Green

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.

Cholesteric liquid crystal writing tablet with spacer controlled sensitivity

The present invention relates to a display film that may be transferred by lamination or otherwise onto a substrate. The display film is formed of a stack of layers that can include different types, arrangements, and functionality within the stack depending upon factors including the characteristics of the substrate (e.g., upper or lower, transparent or opaque, substrates) and addressing of the display (e.g., active or passive matrix, electrical or optical addressing). The layers of the stacked display film include one or more electrode layers and one or more liquid crystal layers and, in addition, may include various combinations of an adhesive layer, preparation layer, casting layer, light absorbing layer, insulation layers, and protective layers. The liquid crystal layer can include cholesteric or other liquid crystal material. The liquid crystal layer can be a dispersion of liquid crystal in a polymer matrix formed by a variety of techniques. The display film may interact with components mounted on or laminated to the substrate, including a solar cell, active matrix backplane and electrodes. The display film may be mounted onto flexible or drapable substrates such as fabric and can itself be drapable. A liquid crystal display includes the display film and a single substrate for supporting the display film. Thus, the invention offers substantial flexibility in fabrication and design that has not been previously possible in the display industry.

Single substrate liquid crystal display

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Kent, OH, United States of America

Oleg Pishnyak