Piezoelectric inkjet-based one cell per one droplet automatic printing by image processing

Piezoelectric inkjet printer technology recently has gained attention and was utilized eject particles and cells of several tens of μm scale, which is large compared to colloid used in printer ink. However, the inkjet head was originally design for color ink. Therefore, problems, such as, head clogging and trajectory error occurred. In this study, those problems were addressed, and optimal condition for stable cells ejection was verified. Furthermore, one cell per one droplet printing method was established by observing cells position on the inside of inkjet head. Finally, automatic one cell per one droplet printing system was successfully developed by processing image of the inkjet head to automatically detect cells position. The automatic one cell per one droplet printing system was successfully developed with 98% successful ratio.