Patent ID: 6671026
Filing Date: 2003-12-30
Classification: C03C

Abstract:
A flat panel liquid-crystal display, suitable for a laptop computer, the flat panel liquid-crystal display comprising one of: a twisted nematic display, a supertwisted nematic display, an active matrix liquid-crystal display, a thin film transistor display, and a plasma addressed liquid-crystal display, said flat panel liquid-crystal display comprising:backlight apparatus; a first linear polarizer adjacent said backlight apparatus; a first positive uniaxial retardation film adjacent said first linear polarizer; a first negative retardation film adjacent said first positive uniaxial retardation film; a first orientation film adjacent said first negative retardation film; a liquid-crystal layer adjacent said first orientation film; a second orientation film adjacent said liquid-crystal layer; a second negative retardation film adjacent said second orientation film; a second positive uniaxial retardation film adjacent said second negative retardation film; a second linear polarizer adjacent said second positive uniaxial retardation film; a first glass substrate being disposed between said first orientation film and said first negative retardation film; a second glass substrate being disposed between said second orientation film and said second negative retardation film; a first electrode being disposed between said first glass substrate and said first orientation film; and a second electrode being disposed between said second glass substrate and said second orientation film said first and said second glass substrates comprising: an alkali-free aluminoborosilicate glass; said glass having a coefficient of thermal expansion &agr;20/300 of between 2.8Ã—10âˆ’6/K and 3.6Ã—10âˆ’6/K; said glass having the composition (in % by weight, based on oxide): SiO2>58-65B2O3>6-11.5Al2O3>20-25MgO4-<6.5CaO>4.5-8SrO0-<4BaO0.5-<5with SrO + BaO>3ZnO0-<2;said glass being resistant to thermal shock; said glass having a high transparency over a broad spectral range in the visible and ultra violet ranges; and said glass being free of bubbles, knots, inclusions, streaks, and surface undulations.