Detection of gap mura in TFT LCDs by the interference pattern and image sensing method

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/103226

Title:	Detection of gap mura in TFT LCDs by the interference pattern and image sensing method
Authors:	張榮森;Tsai, Jang Zern;Chang, Rong-Seng;Li, Tung-Yen
Contributors:	理學院光電科學與工程學系
Keywords:	Defects;Glass;I/Image classification;I/Image processing;Inspection;Interference;L/Liquid crystal displays;L/Liquid crystals;Liquid crystal displays;O/Optical signal detection;Production;Studies;Thin film transistors
Date:	2013-07-18
Issue Date:	2026-04-23 11:26:08 (UTC+8)
Publisher:	Institute of Electrical and Electronics Engineers Inc.;New York: IEEE
Abstract:	摘要： In this paper, we focus on pretesting to find the gap mura defects before the injection of liquid crystal into the cell of a thin-film-transistor liquid-crystal display panel. An optical interference pattern sensing method for inspection of the gap mura defects is used. We propose automatic quantization of mura panel defects in terms of the crossing points of the interference pattern. By doing so, panels with unacceptable gap mura could be sorted out simply by a binary classification, which facilitates automated visual inspection. The advantages of using this method include that it allows for pretesting before the injection of liquid crystal, meaning that defective panels can be found before the next process step and the wastage of liquid crystal materials can be avoided. The yield rate and manufacturing process efficiency can be improved and the inspection time can be shortened from 20 s by human inspection to less than 2 s by automatic inspection. Experiment results show that the proposed method offers improved performance for gap mura detection. 其他題名： TIM 出版者： New York: IEEE 出版日期： 2013-11-01 出處： IEEE transactions on instrumentation and measurement, 2013-11, Vol.62 (11), p.3087-3092 資源來源： IEEE Electronic Library (IEL) 版權： Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Nov 2013 識別號： ISSN: 0018-9456 識別號： EISSN: 1557-9662 識別號： DOI: 10.1109/TIM.2013.2270049 識別號： CODEN: IEIMAO
Appears in Collections:	[Department of Optics and Photonics] journal & Dissertation

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