广视角最新技术介绍与液晶显示器产业分析.pdf

廣視角最新技術介紹與 液晶顯示器產業分析 Reporter: 趙仁駿 林妍均 Outline Introduction of Liquid Crystal Display The Cause of Narrow Viewing Angle Current Methods for Expanding the Viewing Angle Novel Methods for Expanding the Viewing Angle Conclusion What is Liquid Crystal Display? A normally white TN cell. What is Narrow Viewing Angle? Narrow Viewing Angle Effect goto Principles for Expanding the Viewing Angle Current Methods for Expanding the Viewing Angle TN+Film IPS (In-Plane Switching or Super TFT) MVA (Multi-domain Vertical Alignment) Others (FFS: Fringe Field Switching) Please refer to student report, 2003. IIlustration: TN, IPS, MVA Novel Methods for Expanding the Viewing Angle Liquid Crystal Alignment on Surface Relief Gratings Molecular Crystals Liquid Crystals, Vol. 412, pp. 163, 2004 μ-rubbing (Four-domain Microrubbing) Appl. Phys. Lett. 86, 181914, 2005 LSH (Locked-Super Homeotropic) Appl. Phys. Lett. 86, 031108, 2005 Surface Relief Gratings Schematic diagram of a device with Viewing angle dependence of surface gratings. luminance at 6.23V. goto μ-rubbing (Four-domain Microrubbing) μ-rubbing introduces a small tilt of the aliphatic chains that are present in the polyimide for promoting homeotropic anchoring in the unrubbed normal state. Groove Width: 45 μm Groove Depth: 5~15 nm Pretilt Angle: θ~1° Effect of μ-r