A Novel Continuous Extrusion Process to Fabricate Wedge-Shaped Light Guide Plates

Backlight modules are key components in thin-film transistor liquid crystal displays (TFT-LCD). Among the components of a backlight module, the light guide plate (LGP) plays the most important role controlling the light projected to the eyes of users. A wedge-shaped LGP, with its asymmetrical struct...

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Bibliographic Details
Published in:International journal of polymer science 2013-01, Vol.2013 (2013), p.1-6
Main Authors: Lin, Jui-Chang, Hsiao, Wen-Tse, Huang, Keng-Shiang, Yang, Chih-Hui, Grumezescu, Alexandru Mihai, Tseng, Shih-Feng, Lin, Yung-Sheng
Format: Article
Language:English
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Summary:Backlight modules are key components in thin-film transistor liquid crystal displays (TFT-LCD). Among the components of a backlight module, the light guide plate (LGP) plays the most important role controlling the light projected to the eyes of users. A wedge-shaped LGP, with its asymmetrical structure, is usually fabricated by an injection proces, but the fabrication time of this process is long. This study proposes a continuous extrusion process to fabricate wedge-shaped LGPs. This continuous process has advantages for mass production. Besides a T-die and rollers, this system also has an in situ monitor of the melt-bank that forms during the extrusion process, helping control the plate thickness. Results show that the melt bank has a close relationship with the plate thickness. The temperature of the bottom heater and roller was adjusted to reduce the surface deformation of the wedge-shaped plate. This continuous extrusion system can successfully manufacture wedge-shaped LGPs for mass production.
ISSN:1687-9422
1687-9430
DOI:10.1155/2013/610132