Patent ID: 8432183

Claim:
An element substrate comprising: a first group of terminals and a second group of terminals each for receiving a differential signal; a third terminal for receiving a control signal; a first reception unit configured to receive the differential signal via the first group of terminals and output a single-end signal; a second reception unit configured to receive the differential signal via the second group of terminals and output a single-end signal; a driving unit including a first reception portion for receiving a first single-end signal and a second reception portion for receiving a second single-end signal and configured to drive a driving element based on the first single-end signal and the second single-end signal; a switch unit configured to switch between a first connection state in which an output of the first reception unit is connected to the first reception portion and an output of the second reception unit is connected to the second reception portion, and a second connection state in which the output of the first reception unit is connected to the second reception portion and the output of the second reception unit is connected to the first reception portion; and a setting unit configured to set either the first connection state or the second connection state based on the control signal.