Browsing by Author "Chang, Chih-Yuan"

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AN APPLICATION OF IMAGE PROCESSING IN FLAT PANELS
(2012-01-01)
Huang, Yuchung
;
Wu, Chiahsiang
;
Chang, Chih-Yuan
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電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
An image processing system has been designed, implemented and experimented for use in the Liquid Crystal Display fabrication. To improve the efficiency of throughput while LCDs conveyed in the fabrication process, an automatic system of the alignment and the dispensing detection are undertaken using image capture on an XY table. An explanation on the configuration of optics and the panel orientation correction are introduced. A cross marked key for alignment is captured by a CCD camera which provides us the coordinates and the orientation of the LCD. Implementations of the algorithm of the binarization, the edge detection and the thinning/skeletonization are executed in the Visual Basic language. The dispensing performance is investigated by calculation the dege width of the gluing material on the panels. The experimentation reveals us a satisfactory result and a user-friendly interface to personal computers.
Treatment of Reactive Black 5 by combined electrocoagulation-granular activated carbon adsorption-microwave regeneration process
(2010-03-15)
Chang, Shih-Hsien
;
Wang, Kai-Sung
;
Liang, Hsiu-Hao
;
Chen, Hsueh-Yu
;
Li, Heng-Ching
Treatment of an azo dye, Reactive Black 5 (RB5) by combined electrocoagulation-activated carbon adsorption-microwave regeneration process was evaluated. The toxicity was also monitored by the Vibrio fischeri light inhibition test. GAC of 100 g L(-1) sorbed 82% of RB5 (100 mg L(-1)) within 4h. RB5-loaded GAC was not effectively regenerated by microwave irradiation (800W, 30s). Electrocoagulation showed high decolorization of RB5 within 8 min at pH(0) of 7, current density of 277 A m(-2), and NaCl of 1 g L(-1). However, 61% COD residue remained after treatment and toxicity was high (100% light inhibition). GAC of 20g L(-1) effectively removed COD and toxicity of electrocoagulation-treated solution within 4h. Microwave irradiation effectively regenerated intermediate-loaded GAC within 30s at power of 800 W, GAC/water ratio of 20 g L(-1), and pH of 7.8. The adsorption capacity of GAC for COD removal from the electrocoagulation-treated solution did not significantly decrease at the first 7 cycles of adsorption/regeneration. The adsorption capacity of GAC for removal of both A(265) (benzene-related groups) and toxicity slightly decreased after the 6th cycle. (C) 2009 Elsevier B.V. All rights reserved.