Patent ID: 7123225
Filing Date: 2006-10-17
Classification: G09G

Abstract:
1. A method of driving an active matrix liquid crystal display (AM-LCD), wherein said AM-LCD has a plurality of unit pixels arranged in array form, and each said unit pixel has a pixel electrode, an opposite common electrode, and a liquid crystal layer disposed there between, said method comprising the following steps: applying a alternating voltage signal V(n) with a selected gray level n to said pixel electrode; simultaneously applying a first compensated voltage signal V′(n) to said pixel electrode, wherein said first compensated voltage signal V′(n) varies depending on said alternating voltage signal V(n) with said selected gray level n to compensate said alternating voltage signal V(n) for the potential shift induced by the parasitic capacitance and the coupling capacitance of said unit pixel; and simultaneously applying a second compensated voltage signal Vasy(n) to said pixel electrode, wherein said second compensated voltage signal Vasy(n) varies depending on said alternating voltage signal V(n) with said selected gray level n to compensate said alternating voltage signal V(n) for the potential shift induced by the different material or the asymmetric appearance of said pixel electrode and said common electrode, wherein said second compensated voltage signal has n+1 sorts and can be divided basing on different pray levels into Vasy(