ACTIVE MATRIX DISPLAY HAVING PIXEL DRIVING CIRCUITS WITH INTEGRATED CHARGE PUMPS

摘要

A pixel driving circuit (400) receives a signal voltage VA from a column bus(403) and generates thereform, a back plate electrodevoltage VB which is approximately twice that of a signal voltage VA. Includedin the pixel driving circuit (400) are three transistors (402,407 and 408) and a storage capacitor (404). During a first time period, two ofthe three transistors turn on to charge up or discharge thestorage capacitor to the signal voltage VA, while the third transistor (407)is tamed off, and during a second time, the third transistor (407)is turned on to effectively double the voltage provided to the back plateelectrode, while the other two of the three transistors are turned off.