An analytical model for instant design of an LCD cell with photospacers under gravity and local loading

— An analytical model of an LCD cell under gravity and local loading to prevent permanent deformation of the photospacers and the occurrence of gap mura will be presented. The analytical model is established from the Winkler model, which is composed of a beam and a series of springs. The analytical solutions have been simplified under specific assumptions and modified through three-dimensional simulations in order to improve their accuracy. Therefore, the analytical model can be applied to the design of an in-cell touch panel while considering the local loading due to touch or probe testing and contact conditions of photospacers. This analytical model can be used to provide instant design criteria for photospacers without considerable simulation and experimental data and to enhance the reliability of the LCD cell structure.

[1]  Suk I. Yoo,et al.  Area-mura detection in TFT-LCD panel , 2004, IS&T/SPIE Electronic Imaging.

[2]  Shang Liang Chen,et al.  TFT-LCD Mura Defects Using Independent Component Analysis , 2009 .

[3]  Raymond H. Plaut,et al.  Optimization of elastic foundation for minimum beam deflection , 1987 .

[4]  Nishio Toshiro,et al.  Photosensitive Column Spacer Materials for Liquid Crystal Display Panels , 2005 .

[5]  Raymond H. Plaut,et al.  Design of beams, plates and their elastic foundations for uniform foundation pressure , 1990 .

[6]  Yoon Young Kim,et al.  Optimization of Support Locations of Beam and Plate Structures Under Self-Weight by Using a Sprung Structure Model , 2009 .

[7]  D. Bojczuk,et al.  On optimal design of supports in beam and frame structures , 1998 .

[8]  In-Jae Chung,et al.  Formation of the overcoat layer and column spacer for TFT-LCD using capillary force lithography , 2010, Displays.

[9]  Jeong-Hoon Lee,et al.  Study of Improvement of Scan Mura in In-Plane Switching Panel Fabricated by the Inkjet Spacer Process , 2010 .

[10]  Zenon Mróz,et al.  Optimal design of structures with variable support conditions , 1975 .

[11]  Matthew E. Colburn,et al.  Design of orientation stages for step and flash imprint lithography , 2001 .

[12]  Jung-Min Sohn,et al.  Improvement of column spacer uniformity in a TFT LCD panel , 2006 .

[13]  Kazutaka Taniguchi,et al.  A mura detection method , 2006, Pattern Recognit..

[14]  Sang Jeon Yu,et al.  Influence of Ball Spacer Size and Density on Liquid Crystal Margin of In-Plane Switching Panel Fabricated by the Inkjet Process , 2010 .