Patent ID: 7479939
Filing Date: 2009-01-20
Classification: G02F,G09G,H01L,H04N

Abstract:
1. A driving method for an electro-optical device having a plurality of pixel electrodes, each of which has a light modulating layer and a thin film transistor connected thereto, said method comprising the steps of: addressing said thin film transistor with a scan signal for a predetermined period, in sequence; and supplying each of said pixel electrodes with a data signal through the corresponding thin film transistor during said addressing with said scan signal, wherein said predetermined period is time-divided into a predetermined number of divisions, and said data signal contains a plurality of pulses having a constant pulse width, the number of said pulses being determined depending upon a tone of an image to be displayed, and wherein an average voltage of said pulses is applied to corresponding one of said pixel electrodes after said predetermined period to display said tone of said image.