Patent ID: 6897839
Filing Date: 2005-05-24
Classification: G09G

Abstract:
1. An active matrix display comprising: a plurality of pixel electrodes arranged in the form of a matrix; a plurality of scanning lines arranged in a row direction; a plurality of signal lines arranged in a column direction: a plurality of switching elements having gate electrodes and drain or source electrodes connected to said scanning lines and said signal lines respectively; a signal line driving circuit sequentially selecting prescribed scanning lines from said plurality of scanning lines and supplying a video signal; a scanning line driving circuit sequentially selecting prescribed scanning lines from said plurality of scanning lines and supplying a scanning signal; and a level shifter group including a plurality of level shifters connected to at least either said signal line driving circuit or said scanning line driving circuit for operating in a time-divisional manner, wherein each said level shifter forming said level shifter group includes: a level conversion circuit converting a signal voltage level, a control circuit generating a control signal deciding an operating period of said level shifter, and a first switching circuit supplying a power supply voltage to said level conversion circuit in response to said control signal, at least either said signal driving circuit or said scanning line driving circuit has a shift register consisting of a plurality of latch circuits, and a plurality of said latch circuits are associatively connected to each said level shifter forming said level shifter group each said level shifter forming said level shifter group starts operation before operation initiation of said latch circuits associatively connected thereto and terminates the operation before operation termination of said latch circuit.