Patent ID: 6351256
Filing Date: 2002-02-26
Classification: G09G

Abstract:
A method of addressing a liquid crystal device comprising addressing a pixel of the device by applying a first signal to a selected one of a first plurality of electrodes of the device and applying a second signal to a selected one of a second plurality of electrodes of the device, such that the switching state of said pixel is determined by a resultant of said first and second signals applied to the selected electrodes which cross one another at the location of the pixel, and selecting said second signal from amongst at least a first data signal and a second data signal, said pixel being switched by said resultant from a first switching state to a second switching state when said second signal comprises said first data signal, and said pixel not being switched by said resultant but being maintained in said first switching state when said second signal comprises said second data signal, each of said first and second data signals having an overall duration and, within said overall duration, a discriminating period within which said data signal has a non-zero voltage in at least initial and final parts of said discriminating period and within which said resultant discriminates between (i) switching of said pixel to said second switching state and (ii) maintenance of said pixel in said first switching state, wherein said first data signal differs from said second data signal within at least a part of said discriminating period, wherein said first signal comprises a first portion applied during said discriminating period and a second portion applied after said discriminating period, and wherein at least a part of said second portion has a larger voltage magnitude than said first portion.