A Bistable Liquid Crystal Display Device Using Polymer Stabilization

KSU.164

Abstract: The display requirements for "electronic Paper" are very low cost, low power, high resolution, and with lightweight.  These attributes can be supplied by a liquid-crystal electro-optical effect that has memory, so if a picture element is set to a particular state (bright or dark), it will remain in that state without electrical refreshing.  This invention is for a liquid crystal display device including a polyimide alignment layer.  It is the object of the present invention to provide a bistable liquid crystal device, which substantially eliminates undesired states.  The present inventions provide a liquid crystal display device including a polyimide alignment layer, having a bistable liquid crystal material and a polymer stabilizer in an amount from about 1% to about 15% based on the total weight of polymer and liquid crystal material, wherein the liquid crystal provides a twist angle from 0° to 360°.

Applications:

•          Low cost, high-resolution display devices requiring low power
•          Especially helpful for electronic paper to display books, maps, status information, etc.

Advantages:

•          Low driving voltage
•          Low power consumption
•          Fast switching

Inventors: Charles D. Hoke, Philip J. Bos, Jianlin Li