Patent ID: 8217930

Claim:
A method for driving at least a portion of a passive matrix display system having rows and columns forming pixels, comprising steps of performed in the following order: (a) driving the pixels of the passive matrix display system to a homeotropic state by outputting a first voltage pulse to the rows; (b) driving the pixels of the passive matrix display system to a focal conic state; (c) resetting the pixels by driving the passive matrix display system to a homeotropic state by outputting a second voltage pulse to the rows; (d) waiting for a predetermined period of time within the range of 1 microsecond to 6 milliseconds; (e) outputting to the rows a first row voltage signal, wherein the first row voltage signal is applied to the row of the matrix being written, and outputting to the rows a second row voltage signal, wherein the second row voltage signal is applied to all the rows of the matrix not being written.