Patent ID: 7804095

Claim:
An image display device, comprising, on a TFT substrate: a plurality of gate lines and a plurality of drain lines which intersect with each other; a pixel TFT provided within a pixel which is enclosed by a pair of adjacent gate lines and a pair of adjacent drain lines; a gate driver TFT which is connected to one of the plurality of gate lines to drive the one of the plurality of gate lines; and a shift register for selecting one of the plurality of gate lines through the gate driver TFT, wherein the pixel TFT and the gate driver TFT each include an amorphous semiconductor film as a channel, wherein the pixel TFT has a bottom gate structure in which a gate of the pixel TFT is formed below the amorphous semiconductor film, wherein the gate driver TFT has a dual gate structure in which a gate of the gate driver TFT is formed below the amorphous semiconductor film and another gate of the gate driver TFT is formed above the amorphous semiconductor film, and wherein a mobility on a top surface side of the amorphous semiconductor film of the gate driver TFT is higher than a mobility on a top surface side of the amorphous semiconductor film of the pixel TFT.