To provide a liquid droplet discharge apparatus capable of accurately and stably performing liquid droplet weighing.
The liquid droplet discharge apparatus for drawing on a drawing object by discharging liquid droplets through a discharge head 103 is equipped with the following: a detection means composed of a piezoelectric vibrator 106 having electrodes 110a, 110b on both sides of it; a position deducing means which deduces a prescribed position, whereto liquid droplets are attached, on the electrode 110b and which calculates the transfer amount of transferring at least either the discharge head or the piezoelectric vibrator to the deduced prescribed position; a transfer means which transfers, based on the transfer amount, at least either the discharge head or the piezoelectric vibrator to the deduced prescribed position; an oscillating means which oscillates the piezoelectric vibrator by applying vibration voltage to the electrodes; and a liquid droplet weighing means which detects the change of resonance frequency of the piezoelectric vibrator between before and after the attachment of liquid droplets discharged from the discharge head to the electrodes and which, based on the detected change of resonance frequency of the piezoelectric vibrator, measures the weight of liquid droplets attached to the electrodes.
Fujitsuna Hideyoshi
Osamu Suzawa