Patent ID: 6946801
Filing Date: 2005-09-20
Classification: G09G

Abstract:
1. An organic EL element drive circuit for current-driving any one of organic EL elements of an organic EL display panel by an output current supplied from a current output circuit constructed with a current-mirror circuit through a corresponding terminal pin of said organic EL display panel, comprising: a plurality (n) of unit circuits each including a first MOS transistor of a certain channel type and a second MOS transistor of the same channel type and having a source connected to a drain of said first MOS transistor, where n is an integer equal to or larger than 3, gates of either said first MOS transistors or said second MOS transistors of at least two of said n unit circuits being connected to each other to form a common gate, one of said at least two unit circuits constituting an input side circuit of said current mirror circuit, said common gate being connected to a current drive side terminal of said input side circuit through one of said first MOS transistor and said second MOS transistor of at least one of the remaining unit circuits.