Patent ID: 7131584
Filing Date: 2006-11-07
Classification: C09K,G06K

Abstract:
1. A display system, comprising: a) a light writeable display associated with an identification code and arranged to receive an image wise pattern of light under a constant electric field to form an image on the display, wherein the light writeable display includes: a pair of conductors, at least one conductor being transparent; a layer of cholesteric liquid crystal material disposed between the conductors, the cholesteric liquid crystal material having multiple stable optical states at zero electrical field; and a light absorber for forming an image wise thermal pattern in the cholesteric liquid crystal sufficient to change the optical state of the cholesteric liquid crystal in response to an image wise pattern of light; b) a display writer for producing the image wise pattern of light for writing the image on the display; c) a scanner connected to the display writer for sensing the identification code; and d) a processor linked to the scanner and the display writer and responsive to the identification code for programming the display writer to write an image associated with the identification code.