Patent ID: 8466927
Filing Date: 2013-06-18
Classification: G09G

Abstract:
1. A computer-implemented method of updating an image on a bi-stable display, the method comprising: determining a current state of a pixel of the bi-stable display from a current image buffer; determining a desired state of the pixel of the bi-stable display; determining an accumulated error amount for the pixel based on a difference between a calculated reflectance value and an actual reflectance value on the bi-stable display; determining a control signal based on the current state of the pixel, the desired state of the pixel and the accumulated error amount of the pixel; determining whether the accumulated error amount is one of above and equal to a threshold; and updating the pixel using an indirect waveform to eliminate the accumulated error amount by driving the pixel to one of black and white before applying the control signal to the pixel to drive the pixel from the current state to the desired state, wherein a beginning of the updating for each pixel occurs independently of the other pixels of the bi-stable display.