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http://dx.doi.org/10.3795/KSME-A.2017.41.6.525

High-Speed Monitoring Device to Inspect Inkjet Droplets with a Rotating Mirror and Its Measuring Method for Display Applications  

Shin, Dong-Youn (Dept. of Graphic Arts Information Engineering, Pukyong Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.41, no.6, 2017 , pp. 525-532 More about this Journal
Abstract
The development of an inkjet-based manufacturing machine for the production of next-generation displays using organic and quantum-dot light emitting diodes at a low cost has been conducted. To employ inkjet printing in production lines of displays, the development of a high-speed inkjet-monitoring device to verify the reliable droplet jetting status from multiple nozzles is required. In this study, an inkjet monitoring device using a rotatable mirror with rotary and linear ultrasonic motors is developed in place of a conventional, linear reciprocating, motion-based inkjet monitoring device. Its performance is also demonstrated. The measurements of circular patterns with diameters of $10{\mu}m$, $30{\mu}m$, and $50{\mu}m$ are performed with the accuracies of $0.5{\pm}1.0{\mu}m$, $-1.2{\pm}0.3{\mu}m$, and $0.2{\pm}0.5{\mu}m$, respectively, within 17 sec. By optimizing the control program, the takt time can be reduced to as short as 8.6 sec.
Keywords
Inkjet; Microdroplet; Monitoring System; Flat Panel Display;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Pardo, D. A., Jabbour, G. E. and Peyghambarian, N., 2000, "Application of Screen Printing in the Fabrication of Organic Light-Emitting Devices," Advanced Materials, Vol. 12, No. 17, pp. 1249-1252.   DOI
2 Chang, S.-C., Liu, J., Bharathan, J., Yang, Y., Onohara, J. and Kido, J., 1999, "Multicolor Organic Light-Emitting Diodes Processed by Hybrid Inkjet Printing," Advanced Materials, Vol. 11, No. 99, pp. 734-737.   DOI
3 Wood, V., Panzer, M. J., Chen, J., Bradley, M. S., Halpert, J. E., Bawendi, M. G. and Bulovic, V., 2009, "Inkjet-Printed Quantum Dot-Polymer Composites for Full-Color AC-Driven Displays," Advanced Materials, Vol. 21, No. 21, pp. 2151-2155.   DOI
4 Haverinen, H. M., Myllyla, R. A. and Jabbour, G. E., 2010, "Inkjet Printed RGB Quantum Dot-Hybrid LED," Journal of Display Technology, Vol. 6, No. 3, pp. 87-89.   DOI
5 Bae, W. K., Kwak, J., Lim, J., Lee, D., Nam, M. K., Char, K., Lee, C. and Lee, S., 2010, "Multicolored Light-Emitting Diodes Based on All-Quantum-Dot Multilayer Films Using Layer-by-Layer Assembly Method," Nano Letters, Vol. 10, No. 7, pp. 2368-2373.   DOI
6 Shin, D. Y., Grassia, P. and Derby, B., 2003, "Oscillatory Limited Compressible Fluid Flow Induced by the Radial Motion of a Thick-walled Piezoelectric Tube," The Journal of the Acoustical Society of America, Vol. 114, No. 3, pp. 1314-1321.   DOI
7 Shin, D. Y., Grassia, P. and Derby, B., 2004, "Numerical and Experimental Comparisons of Mass Transport Rate in a Piezoelectric Drop-on-demand Inkjet Print Head," International Journal of Mechanical Sciences, Vol. 46, No. 2, pp. 181-199.   DOI
8 Shin, D. Y., Grassia, P. and Derby, B., 2005, "Oscillatory Incompressible Fluid Flow in a Tapered Tube with a Free Surface in an Inkjet Print Head," Journal of Fluids Engineering, Vol. 127, No. 1, pp. 98-109.   DOI
9 Wee, S.-K., Oh, S., Lee, J. Y., Lee, Y.-S. and Chung, J., 2006, "A Study on Droplet Formation from Piezo Inkjet Print Head," Trans. Korean Soc. Mech. Eng. B, Vol. 30, No. 10, pp. 1003-1011.   DOI
10 Lee, Y.-S., Wee, S. K., Oh, S. Y. and Chung, J. W., 2007, "Numerical Simulation of Hydro-Acoustic Flow in Piezo Inkjet Print Head," Trans. Korean Soc. Mech. Eng. B, Vol. 31, No. 1, pp. 51-61.   DOI
11 Lee, J. Y. and Lee, S. T., 2004, "Laser-Induced Thermal Imaging of Polymer Light-Emitting Materials on Poly(3,4-ethylenedioxythiophene): Silane Hole-Transport Layer," Advanced Materials, Vol. 16, No. 1, pp. 51-54.   DOI
12 Lee, T.-M., Choi, Y.-J., Nam, S.-Y., You, C.-W., Na, D.-Y., Choi, H.-C., Shin, D.-Y., Kim, K.-Y. and Jung, K.-I., 2008, "Color Filter Patterned by Screen Printing," Thin Solid Films, Vol. 516, No. 21, pp. 7875-7880.   DOI
13 Chang, Y.-G., Nam, S.-H., Kim, N.-K., Kook, Y.-H., Kim, J., Yoo, S.-S., Kim, C.-D., Kang, I.-B. and Chung, I.-J., 2009, "A Study of Roll-printing Technology for TFT-LCD Fabrication," Journal of the Society for Information Display, Vol. 17, No. 4, pp. 301-307.   DOI
14 Suh, M. C., Chin, B. D., Kim, M.-H., Kang, T. M. and Lee, S. T., 2003, "Enhanced Luminance of Blue Light-Emitting Polymers by Blending with Hole-Transporting Materials," Advanced Materials, Vol. 15, No., 15, pp. 1254-1258.   DOI
15 Koo, H.-S., Chen, M. and Pan, P.-C., 2006, "LCDbased Color Filter Films Fabricated by a Pigmentbased Colorant Photo Resist Inks and Printing Technology," Thin Solid Films, Vol. 515, No. 3, pp. 896-901.   DOI
16 Chen, C.-T., Wu, K.-H., Lu, C.-F. and Shieh, F., 2010, "An Inkjet Printed Stripe-type Color Filter of Liquid Crystal Display," Journal Micromechanics and Microengineering, Vol. 20, No. 5, p. 055004.   DOI
17 Hiruma, K., Suzuki, K., Kasuga, O., Ito, A., Iwai, Y., Aruga, H., Yazaki, M., Hashizume, A., Okusa, T., Nagasawa, H., Nagasaka, M. and Usui, T., 2006, "Ink Jet Fabrication of Alignment Layers on High-Temperature Polysilicon Liquid Crystal Panels," Digest of Technical Papers - Society for Information Display International Symposium, Vol. 37, No. 1, pp. 1583-1586.
18 Fan, K.-C., Chen, J.-Y., Wang, C.-H. and Pan, W.-C., 2008, "Development of a Drop-on-demand Droplet Generator for One-drop-fill Technology," Sensors and Actuators, A: Physical, Vol. 147, No. 2, pp. 649-655.   DOI
19 Shin, D. Y. and Brakke, K. A., 2009, "Modelling and Analysis of the Wetting Characteristics of Ink for Display Applications with the Surface Evolution Technique," Modelling and Simulation in Materials Science and Engineering, Vol. 17, No. 4, p. 045002.   DOI
20 Shin, D. Y. and Smith, P. J., 2008, "Theoretical Investigation of the Influence of Nozzle Diameter Variation on the Fabrication of Thin Film Transistor Liquid Crystal Display Color Filters," Journal of Applied Physics, Vol. 103, No. 11, p. 114905.   DOI
21 Shin, D.-Y., 2010, "High-Speed Inkjet Monitoring Module for Jetting Failure Inspection," Trans. Korean Soc. Mech. Eng. A, Vol. 34, No. 10, pp. 1521-1527.   DOI
22 van der Bos, A., van der Meulen M.-J., Driessen, T., van den Berg, M., Reinten, H., Wijshoff, H., Versluis, M. and Lohse, D., 2014, "Velocity Profile inside Piezoacoustic Inkjet Droplets in Flight: Comparison between Experiment and Numerical Simulation," Physical Review Applied, Vol. 1, No. 1, p. 014004.   DOI
23 Kwon, K.-S., Jang, M.-H., Park, H. Y. and Ko, H.-S., 2014, "An Inkjet Vision Measurement Technique for High-frequency Jetting," Review of Scientific Instruments, Vol. 85, No. 6, p. 065101.   DOI
24 Wijshoff, H., 2010, "The Dynamics of the Piezo Inkjet Printhead Operation," Physics Reports, Vol. 491, No. 4, pp. 77-177.   DOI