Patent ID: 8212600

Claim:
A semiconductor device comprising: a pixel portion; and a source signal line driver circuit comprising a flip flop, a data latch circuit, a latch circuit, a level shifter and a buffer, the data latch circuit comprising: a capacitor; an inverter; a first transistor; a second transistor; a third transistor; a first wiring; and a second wiring, wherein an input terminal of the inverter is electrically connected to a first electrode of the capacitor, wherein one of a source and a drain of the first transistor is electrically connected to the input terminal of the inverter, wherein the other of the source and the drain of the first transistor is electrically connected to an output terminal of the inverter, wherein one of a source and a drain of the second transistor is electrically connected to a second electrode of the capacitor, wherein one of a source and a drain of the third transistor is electrically connected to the second electrode of the capacitor, wherein the other of the source and the drain of the second transistor is electrically connected to the first wiring, wherein the other of the source and the drain of the third transistor is electrically connected to the second wiring, wherein the first wiring is supplied with a reference potential, wherein the second wiring is supplied with a video signal, and wherein the pixel portion and the source signal line driver circuit are formed on a same substrate.