Patent ID: 8476632

Claim:
A semiconductor device comprising: a conductive film functioning as an antenna; a power source generating circuit electrically connected to the conductive film functioning as an antenna, the power source generating circuit including a constant voltage circuit and a displaying power source circuit; an integrated circuit and a display element electrically connected to the power source generating circuit wherein the constant voltage circuit is configured to supply a first voltage to the integrated circuit and the displaying power source circuit is configured to supply a second voltage to the display element; a first thin film transistor provided in the power source generating circuit; a second thin film transistor provided in the integrated circuit; a third thin film transistor provided in the display element; an insulating film provided to cover the first thin film transistor, the second thin film transistor, and the third thin film transistor; a source electrode and a drain electrode of the first thin film transistor, a source electrode and a drain electrode of the second thin film transistor, and a source electrode and a drain electrode of the third thin film transistor which are formed over the insulating film; and a pixel electrode electrically connected to the source electrode or the drain electrode of the third thin film transistor, wherein the source electrode or the drain electrode of the first thin film transistor is electrically connected to the conductive film functioning as an antenna.