| dc.description.abstract | This study visualizes and measures the droplet ejection process of a high-resolution thermal-bubble inkjet printhead. A simple system utilizes the synchronization of the stroboscope, which consist of a set of optical lens, a function generator, and an image grabber, to record the droplets image at different delay time and analyze the length, flying speed and size of droplets. Also, the influences of voltage, pulse width, frequency, and the different viscosity of ink on droplet ejection process are discussed in order to know the relation between the inkjet signals and droplet ejection behavior, and then compare it with related records of documents. Finally, the signals of the inkjet printhead from a genuine printer are measured to investigate the relation of signal and the printing quality. This study finds that the voltage and pulse width are two key factors for providing stable heat flux, and by adjusting frequency one can adapt for various types of paper and printing effect. Further, during the lead time of developing inkjet printhead, this experimental system can be used to measure the correct signals and hence prevent heater burnout by misoperation. Moreover, this system can be utilized to adjust the frequency and change the ink characteristic in order to meet with the requirement of printing quality and to reduce the lead time and development costs. | en_US |