Liquid crystal display device that has elastic back structure and is erasable

Abstract

A liquid crystal display device includes a flexible front substrate, a liquid crystal layer comprising cholesteric liquid crystal material, and: i) a flexible back substrate and an elastic material layer; or ii) an elastic back substrate. The flexible front substrate is located more proximal to a person viewing the liquid crystal display device than is the liquid crystal layer. The i) flexible back substrate and the elastic material layer; or ii) the elastic back substrate, when present, are located in back of the liquid crystal layer. Pressure on the flexible front substrate changes a texture of the cholesteric liquid crystal material which displays an image. The pressure is from at least one of: i) impact of a projectile, a corresponding image including an impact mark; ii) a writing instrument, a corresponding image including writing or drawing; and iii) an imprinting instrument, a corresponding image including an imprinted image. Application of an electric field to the liquid crystal layer or flexing of the liquid crystal layer erases at least a portion of the image. Another aspect is a liquid crystal display device that includes a flexible front substrate, a liquid crystal layer comprising cholesteric liquid crystal material, and an elastic back structure that makes the liquid crystal display device elastic.

Dependencies are inferred from the claim text.