ACTIVE MATRIX DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME

摘要

25307-177 An active matrix display device of an improved and simplified configuration and a driving method are disclosed. The display device according to the present invention is characterized in that data bus lines and scan bus lines are separately formed on first and second transparent substrates respectively and the drain electrode of each TFT (thin film transistor) on the second substrate is connected to the scan bus line to be addressed next. This configuration eliminates the earth bus lines of the prior art. This arrangement has the effect of simplifying the bus line design and obtaining a nigher yield and an increased opening rate for each display element. In order to drive the device, and address pulse having a stepped waveform is used. Each address pulse has Vgc, and Vgoff levels, and a width of two horizontal scan time. The first step of address pulse Vgc corresponds to the address time of the adjacent scan bus line to be scanned previously; and the second step Vgon corresponds to the address time for the TFT to be scanned. The present invention discloses a voltage relation for waveforms of the address pulse and data pulse in order to obtain a high quality display.