A Novel Continuous Extrusion Process to Fabricate Wedge-Shaped Light Guide Plates. (12th December 2013)

• Record Type: Journal Article
• Authors: Hsiao, Wen-Tse; Lin, Jui-Chang; Huang, Keng-Shiang; Yang, Chih-Hui; Grumezescu, Alexandru Mihai; Tseng, Shih-Feng; Lin, Yung-Sheng
• Other Names: He Peng Academic Editor.
• Is Part Of: International journal of polymer science. Volume 2013(2013)
• Publication Date: 2013-12-12
• Subjects: Polymers -- Periodicals; Polymers; Periodicals; 547.7
• DOI: 10.1155/2013/610132
• Languages: English
• ISSNs: 1687-9422

Abstract

Abstract : 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.