Droplet ejecting apparatus

A droplet ejecting apparatus, comprising:

• a board having a first surface and a second surface;
• a solution container on the first surface of the board, the solution container having a solution inlet for receiving a solution and a first solution outlet;
• a plurality of nozzle groups fluidly connected to the solution container, each nozzle group having a plurality of nozzles from which the solution can be ejected, each nozzle having a pressure chamber and an actuator associated therewith, each actuator in each nozzle group being electrical connected in parallel to a first electrode and a second electrode, each actuator causing a pressure change in a corresponding pressure chamber to control an ejection of a droplet of the solution from the corresponding nozzle;
• and
• a plurality of drive circuits respectively connected to the first electrode and the second electrode of each nozzle group, each drive circuit configured to supply a drive signal, the first and second electrodes being disposed on the second surface of the board.

A solution dispenser, comprising:

• a base on which a microplate can be disposed;
• a solution container having a solution inlet for receiving a solution and a first solution outlet;
• a first nozzle group fluidly connected to the solution container via the first solution outlet and having a first plurality of nozzles from which the solution can be ejected, each nozzle in the first plurality of nozzles having a pressure chamber associated therewith;
• a second nozzle group fluidly connected to the solution container and having a second plurality of nozzles from which the solution can be ejected, each nozzle in the second plurality of nozzles having a pressure chamber associated therewith;
• a first plurality of actuators respectively associated with each nozzle in the first nozzle group, each actuator in the first plurality of actuators causing a pressure change in a corresponding pressure chamber in the first nozzle group to control an ejection of a droplet of the solution from the corresponding nozzle;
• a second plurality of actuators respectively associated with each nozzle in the second nozzle group, each actuator in the second plurality of actuators causing a pressure change in a corresponding pressure chamber in the second nozzle group to control an ejection of a droplet of the solution from the corresponding nozzle;
• and
• a plurality of drive circuits respectively connected in a parallel to the first and the second plurality of actuators, each drive circuit configured to supply a drive signal, wherein
• when supplied by each drive circuit to the first and second plurality of actuators respectively, each drive signal causes the solution to be ejected from each nozzle of each respective nozzle group at a same time, and
• the first and second nozzle groups are spaced apart from each other so as to be disposed above a different well opening of the microplate such that droplets ejected from each respective nozzle group are received by a respectively different well of the microplate.