The Study of Self Regulating the Weight of Liquid Crystal by the Deviation of Photo Spacer Height in LCD Panel

• Main Authors: Yi Wen Ding, 丁逸文
• Other Authors: G. B. Wang
• Format: Others
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/03311968358998193849

碩士 === 長庚大學 === 化工與材料工程研究所 === 98 === Nowadays the photo spacer has completely replaced traditional ball spacer in LCD panel industries. By utilizing the newly developed process, not only the cost and production processes are saved, but also the risks of yield loss or scrapped panel products are reduced. It is known that, in the LCD panel, total liquid crystal weight is relative to the height of photo spacer. If the photo spacer is more higher, it means there should be more liquid crystal used in panel. Therefore, it would cause panel scrapped if the photo spacer height is inconsistent during the process operation. To improve the automation of the LCD panel process, a feedback mechanism for self regulating the weight of liquid crystal by the deviation of photo spacer height is studied in this work. The precise liquid crystal weight needed for different photo spacer height is first verified in this study. Then one can set up the related table between liquid crystal weight and photo spacer height in LCD dropping machine. Finally, the results of cell gap experiments demonstrate that the correct liquid crystal weight can be automatically regulated according the measured deviation of the photo spacer height.