Development of a drop-on-demand droplet generator for one-drop-fill technology
Resource
Sensors and Actuators A: Physical 147 (2): 649-655
Journal
Sensors and Actuators, A: Physical
Journal Volume
147
Journal Issue
2
Pages
649-655
Date Issued
2008
Author(s)
Fan, K.C.
Fan, Kuang-Chao
Chen, Jhih-Yuan
Chen, J.Y.
Wang, S, H.
Pan, W. J.
Pan, Wen-Chueh
Abstract
This paper presents the design, fabrication and tests of a piezoelectric-type droplet generator, which can be used for on-line liquid dispensing system. The principle is to actuate a disk-type PZT by a function generator to push the liquid out of the droplet generator and form a near-spherical droplet due to surface tension. A light-emitting diode (LED) is simultaneously triggered using the stroboscopic technique. In situ recording of the droplet formation is achieved by a CCD camera to measure the droplet dimension by image processing methods. The influence of the process parameters on the droplet quality is also studied. For different liquids the drive conditions shall be adjusted in order to obtain the optimum droplet formation. An application to the one-drop-fill (ODF) technology of liquid crystal displays (LCD) was carried out in order to control the droplet sizes and the repeatability of the quantity. © 2008 Elsevier B.V. All rights reserved.
SDGs
Type
journal article
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