Patent ID: 6982687

Claim:
A data drive circuit for a current writing type AMOEL display panel comprising: a plurality of current output channels; and a plurality of channel current generating circuits on respective current output channels for minimizing a difference of current levels occurred between the current output channels, each including; one pair of PMOS transistors having the same widths and lengths and a common gate terminal, a first bias circuit connected to the common gate terminal of the pair of PMOS transistors for prevention of floating of the common gate terminal, a first NMOS transistor for receiving an output current from the pair of PMOS transistors, n (n+1, 2, 3, - - - ) second NMOS transistors connected to a gate terminal of the first NMOS transistor, each for forming a current mirror with the first NMOS transistor for mirroring the output current from the pair of the PMOS transistors, and n PMOS transistors respectively connected to the n second NMOS transistors in series, wherein outputs of the n PMOS transistors are connected in parallel.