Patent ID: 8014055

Claim:
An electro-optic device comprising: a substrate; a plurality of data lines and a plurality of scanning lines arranged on the substrate such that the data lines intersect the scanning lines; a plurality of pixel units arranged for pixels corresponding to intersections between the data lines and the scanning lines; and an image signal supply circuit including a shift register that sequentially outputs transferred signals and another circuit that supplies image signals to the pixel units via the data lines in response to the sequentially output transferred signals output from the shift register, the shift register including a plurality of first transistors each including a first semiconductor layer having a first source region and a first drain region, the other circuit including a plurality of second transistors each including a second semiconductor layer having a second source region and a second drain region, wherein the second source and drain regions contain the same kind of impurity as that contained in the first source and drain regions and contain a higher concentration of the impurity than a concentration of the impurity in the first source and drain regions, wherein the other circuit includes: an enable circuit that shapes the waveforms of the sequentially output transferred signals using a plurality of enable signals to output the resultant signals as shaped signals; and a sampling circuit that samples the image signals in response to the shaped signals or signals based on the shaped signals to supply the sampled signals to the data lines.