Patent ID: 7019717

Claim:
An active matrix type display device including current-writing type pixel circuits arranged in a matrix form for allowing current to pass through said pixel circuits via a data line in accord with luminance to write luminance information thereinto, each pixel circuit having an electro-optical element whose luminance varies with the current passing therethrough, and said pixel circuit comprising: a conversion part for converting the current provided from the data line into voltage; a hold part for holding the voltage converted by said conversion part; and a drive part for converting the voltage held in said hold part into current and passing the converted current through said electro-optical element, wherein said conversion part is shared between at least two separate pixels in a row direction, wherein said conversion part has a first field effect transistor (FET) whose drain and gate are short-circuited, said transistor generating voltage across said gate and source when said transistor is supplied with current from said data line; wherein said hold part has a capacitor for holding said voltage generated across said gate and source of said first FET; and wherein said drive part has a second FET connected in series with said electro-optical element for driving said electro-optical element in accordance with the voltage held in said capacitor.