The Fabrication of Microretarder for In-cell Stereoscopic LCD

• Main Authors: Gwo-Feng Tseng, 曾國棻
• Other Authors: Hoang-Yan Lin
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/29288551305251664716

碩士 === 臺灣大學 === 光電工程學研究所 === 95 === A microretarder for stereoscopic display is a film consisting of horizontal or vertical stripes with alternating null and half-wave phase retardation states. An LCD with a microretarder attached on the front side can display good-quality stereoscopic images when viewed with polarization glasses. It is now the most possible way to present stereoscopic images on a flat-panel display. However, the space caused by the glass between the retarder layer and the LC layer of the panel seriously limits the vertical view angle, which, in turn, limits the application of this technology. In this thesis, a process for thin-film microretarder is developed using reactive liquid crystal. The material and the process are essentially compatible with current fabrication processes of LC panel. Since the thin-film microretarder is to be fabricated in the cell of an LC panel, the retarder layer and the LC layer can be fabricated as close to each other as possible. Theoretically, A nearly unlimited 3D view angle can be achieved for the display. In this thesis, two fabrication methods for the micro-retarder layer have been studied: one is laser writing, and the other is thermal and UV process. Laser writing method shows better results. For integrating the micro-retarder layer into the LC panel, affecting factors in the fabrication process has been studied. We have found that phase retardation changes after applying the thin-film polarizer and it can be solved by using a SiO2 protecting layer between the microretarder layer and the thin-film polarizer. Moreover, the extinction ratio of the thin-film polarizer will be decreased in the following processes and we use a proprietary material in making the thin-film polarizer to improve the thermal stability under high temperature. With all these improvements, a stereoscopic display using in-cell microretarder will hopefully be demonstrated and show the feasibility for wide-viewing angle 3D display.