Patent ID: 6850217
Filing Date: 2005-02-01
Classification: G02F,G09G

Abstract:
1. An operating method for a color display system including an active matrix bistable cholesteric liquid crystal display (LCD) having a plurality of pixels arranged in a matrix based on color data and status bits corresponding to each of the pixels stored in a memory, comprising: generating voltage data corresponding to the pixels of the active matrix bistable cholesteric LCD based on the color data and the status bits stored for each of the pixels; converting the voltage data to drive signals suitable for driving the pixels of the active matrix bistable cholesteric LCD to states of reflectance; applying the drive signals to the pixels of the active matrix bistable cholesteric LCD effective to place the pixels in one of said reflectance states; and maintaining said liquid crystal material of the pixels in said reflectance states such that all of said reflectance states are stable after removing the drive signals without application of any electric field.