Patent ID: 7495641

Claim:
A semiconductor device comprising: a pixel portion including m×n pixels (m and n are both natural numbers and satisfy the relation m<n), said pixels each having a TFT; a first driver having a first N-channel TFT for feeding n first signal lines with selection signals; a second driver having a second N-channel TFT for feeding m second signal lines with video data; and a video data converter circuit, wherein said video data converter converts a digital video datum (h, k){(h=1, 2, 3, . . . , m−1, m) and (k=1, 2, 3, . . . , n−1, n)} into {m×(k−1)+h}-th video datum, and wherein said TFT has a first LDD region not overlapped by a gate electrode of said TFT, and each of said first N-channel TFT and said second N-channel TFT has a second LDD region overlapped by gate electrodes of said first N-channel TFT and said second N-channel TFT respectively.