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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Druckformat: 1065-3090
ISSN Online: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v4.i2.30
pages 119-128

VISUALIZATION OF DROP EJECTION PROCESS OF A THERMAL BUBBLE INK JET PRINTHEAD

Ping-Hei Chen
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan, R.O.C.
Wen-Cheng Chen
Department of Mechanical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 10764, Taiwan, R.O.C.
S.-H. Chang
Department of Mechanical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 10764, Taiwan, R.O.C.

ABSTRAKT

An inexpensive optical system was set up to visualize the drop ejection process of a thermal bubble ink jet (TBIJ) printhead with a thin-film heater on the bottom wall of the ink nozzle. The optical system consists of a controller with a liquid crystal display (LCD), a pulse generator with a power amplifier, a light-emitting diode (LED) stroboscope, a microscope, a charge-coupled device (CCD) camera, a precision three-axis table, and a 486 personal computer with a frame grabber. The temporal evolution of the drop ejection process has been captured by the CCD camera and stored in the computer through the frame grabber. Effects of the electrical heating pulse on the drop ejection process and ejected drop length are investigated in the present study.