TFT New Technology Introduction AFFS = （TFT新技术引入非洲黑人=）.pdf

TFT New Technology Introduction AFFS = Advanced Fringe Field Switching Viewing Angle Problem of LCD • Narrow Viewing Angle due to • 1) Anisotropy of liquid crystal (Δn, Δε) • 2) Different Transmittance with view angle • 3) Imperfect light control by Polarized and Refracted Light CR = good ) λ Φ, CR = Normal CR = Bad Θ, n( Δ On On On Off Off Off LC Θ Analyzer Φ Polarized Light +LC To Solve these problems, Polarizer * In Plane Driving such as FFS, IPS * VA, OCB… with Compensation Film * Dual ~ multi domain Contrast Ratio with View Angle IPS mode : Slight dependency of Contrast Ratio (G127/G63) VA mode : Steep decrease with increasing viewing angle Half Contrast Ratio of IPS mode is much wider than that of VA mode Trend of Wide View Technology The Main Stream of Wide View Technology is IPS Camp VA Camp S-IPS AFFS OCB TMD TN + WV film BOE HYDIS Hitachi LG. Philips SEC TMD CMO NEC Hanstar AUO BOE HYDIS