Drive device, print head and image forming apparatus

A drive device configured to drive a plurality of three-terminal light emitting elements each comprising:

• a first terminal connected to a first power supply;
• a second terminal configured to enable drive current flow to the first terminal from the second terminal, and a first control terminal configured to control the conduction state between the first terminal and the second terminal, the first terminals of the plurality of three-terminal light emitting elements being connected in common, the second terminals of the plurality of three-terminal light emitting elements being connected in common,
• the drive device comprising:
• a drive circuit, including a first conductive type MOS transistor and a second conductive type MOS transistor having a polarity different from that of the first conductive type MOS transistor, the first conductive type MOS transistor and the second conductive type MOS transistor being complementarily connected to each other, and configured to drive three-terminal light emitting elements that are in conduction state among the plurality of three-terminal light emitting elements based on a received drive signal, wherein
• the first conductive type MOS transistor is formed in a substrate region and includes:
• a third terminal connected to a second power supply having a potential different from the potential of the first power supply;
• a fourth terminal connected to the second terminals of the plurality of three-terminal light emitting elements connected in common;
• a second control terminal configured to control the conduction state between the third terminal and the fourth terminal based on the drive signal;
• and a channel formation region, which is a region wherein a channel is to be formed, having an impurity with the same polarity as that of the substrate region injected therein.