Patent ID: 7325894

Claim:
A liquid droplet discharge head, comprising: a plurality of nozzles which discharge droplets of liquid; a first flow channel section and a second flow channel section connected to at least one of the plurality of nozzles wherein at least a portion of a flow channel member forming at least one of the first flow channel section and the second flow channel section has light transmitting properties and a member which selectively reflects or transmits light is disposed between the first flow channel section and the second flow channel section; a nozzle plate which constitutes a portion of at least one of the first flow channel section and the second flow channel section, the plurality of nozzles being formed in the nozzle plate; and an actuator which is provided on a discharge face side of the nozzle plate and causes the droplets of the liquid to be discharged from the nozzles by generating a pressure change in the liquid inside at least one of the first flow channel section and the second flow channel section.