標題: Investigation of Curtain Mura in TFT-TN panels after COG ACF process
作者: Wang, Sheng-Ya
Liao, Wei-Hsiang
Yang, Kei-Hsiung
光電系統研究所
影像與生醫光電研究所
Institute of Photonic System
Institute of Imaging and Biomedical Photonics
關鍵字: Liquid crystal displays;Curtain Mura;LCD optical simulation;Thin film circuit bonding;LCD package
公開日期: 1-十月-2012
摘要: We have utilized a transmission ratio (TR) between curtain-shaped (Curtain) Mura and non-Mura zones as a key parameter to characterize the optical appearance of Curtain Mura occurred on a 13.3-in TFT-TN panel (Mura sample) after bonding process to place silicon-based driver-IC chips on one of the panel substrates using anisotropic conductive film as a binder (COG ACF process). Our measured TRs of the Mura sample at zero applied voltage were in good agreement with calculated TRs using optical parameters of the Mura sample derived from the measured Stokes parameters of the liquid crystal (LC) medium in that sample. We conclude that the occurrence of Curtain Mura is dominant by the stress-induced change in the twist angle, less sensitive and insensitive to the corresponding induced changes in the cell gap and pretilt angle of the in-panel-LC medium, respectively. By simulation, we also point out a way to reduce the occurrence of Curtain Mura by designing the cell gap for a 90 degrees-twsit TN panel to satisfy the condition of Gooch-Terry first minimum. (C) 2012 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.displa.2012.08.002
http://hdl.handle.net/11536/20932
ISSN: 0141-9382
DOI: 10.1016/j.displa.2012.08.002
期刊: DISPLAYS
Volume: 33
Issue: 4-5
起始頁: 173
結束頁: 177
顯示於類別:期刊論文


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  1. 000313849300001.pdf