Patent ID: 7184017

Claim:
A semiconductor device comprising a D/A converter comprising: first to n-th gradation voltage lines; (n−1) first switches, each of which is electrically connected to corresponding one of the first to (n−1)-th gradation voltage lines; (n−1) second switches, each of which is electrically connected to corresponding one of the second to n-th gradation voltage lines; a voltage dividing circuit comprising: a first input terminal electrically connected to the (n−1) first switches; a second input terminal electrically connected to the (n−1) second switches; and m output terminals; m third switches, each of which is electrically connected to corresponding one of the m output terminals; and a source signal line electrically connected to the m third switches, wherein the voltage dividing circuit forms m gradation voltages from a voltage applied between the first input terminal and the second input terminal, and applies each of the m gradation voltages to corresponding one of the m output terminals, wherein each of the (n−1) first switches and the (n−1) second switches is controlled by upper (n−1)/2 bits of a digital video signal, and wherein each of the m third switches is controlled by lower m/2 bits of a digital video signal.