Patent ID: 8730152

Claim:
A method for reinitializing a screen controller of an electrophoretic display device (EPD) upon power-up of the EPD, the method comprising: providing a memory configured to store: old pixel data indicating states of pixels in an initial frame of the EPD; new pixel data indicating target states of pixels in a new frame for the EPD; and current pixel data indicating current states of pixels as the EPD transitions from the initial frame to the new frame; and responsive to power-up of the EPD, reinitializing the memory, the reinitializing comprising: reinitializing the current pixel data by replacing at least a portion of the current pixel data with corresponding screen image data previously stored in a persistent memory; reinitializing the new pixel data by replacing at least a portion of the new pixel data with a corresponding portion of the current pixel data; and reinitializing the old pixel data by replacing at least a portion of the old pixel data with a corresponding portion of the new pixel data.