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

作者：Hsiao Wen Tse; Lin Jui Chang; Huang Keng Shiang; Yang Chih Hui; Grumezescu Alexandru Mihai; Tseng Shih Feng; Lin Yung Sheng^*

来源：International Journal of Polymer Science, 2013, 2013: 610132.

DOI：10.1155/2013/610132

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.

• 出版日期2013