DROPLET DISPENSING DEVICE AND LIGHT SOURCE COMPRISING SUCH A DROPLET DISPENSING DEVICE

摘要

The invention relates to a droplet dispensing device, comprising a reservoir (11) for receiving a liquid material (31), an outlet nozzle (17a) in fluid communication with said reservoir (11) and a piezoelectric actuating means (29, 32) acting on said liquid material (31) at said outlet nozzle (17a) to exit said outlet nozzle (17a) in a sequence of droplets. An improved precision is achieved by providing a piezoelectric actuating means (29, 32) comprising a piston (32), which is actuated by a piezoelectric actuator (29) at one end and dips the other, free end into said liquid material (31 ) just upstream of said outlet nozzle (17a).