Patent ID: 7224352

Claim:
An active matrix display, comprising an array of pixels ( 2 ) arranged in rows and columns, wherein each pixel includes: a display element ( 22 ) for producing a visual output when the display element is driven with a constant current; drive circuitry for controllably driving a substantially constant current through the display element, the drive circuitry including a two transistor inverter ( 14 , 30 ) having an input node ( 28 ) and a drive node ( 20 ), wherein the common node output of the inverter is connected, directly or indirectly, to supply or control the current passing through the corresponding display element; wherein the active matrix display further comprises a plurality of data lines ( 10 ) for carrying a digital signal, a plurality of address lines ( 8 ); wherein the drive circuitry of each pixel comprises an input mode ( 28 ) and an address transistor ( 12 ) for inputting a digital signal to the input node, the address transistor being connected to one of the address lines ( 8 ), one of the data lines ( 10 ), and the input node ( 28 ); and wherein a single common line ( 50 , 60 ) constitutes a power line of one row and the address line of an adjacent row.