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    • 9. 发明授权
    • Liquid crystal display
    • 液晶显示器
    • US06362862B1
    • 2002-03-26
    • US08840622
    • 1997-04-25
    • Osamu ItohShinichi KomuraIkuo HiyamaShoichi HirotaMasaya Adachi
    • Osamu ItohShinichi KomuraIkuo HiyamaShoichi HirotaMasaya Adachi
    • G02F11335
    • H04N9/3105G02F1/133553G02F1/13363G02F1/1393G02F2001/133637G02F2001/133638G02F2413/02H04N5/7441H04N9/3158
    • A liquid crystal display featuring excellent visibility with both good brightness and a high contrast ratio uses a projection optical system in which a polarizing plate, a first phase plate and a second phase plate in which the retardation of each of the phase plates and a gradient of wavelength dispersion of the retardation can be freely set, a liquid crystal layer, and a reflection plate are arranged in parallel and a transmitted light is reflected by the reflection plate. A gradient of one of the phase plates is set to an extremely steep gradient, a gradient of the other phase plate is set to an extremely flat gradient, and the wavelength dispersion of a retardation composite value obtained from the liquid crystal layer and the two phase plates is approximated to a retardation curve expressed by a relational expression of (0.25+0.5n)&lgr;, where (n) is an integer and &lgr; is a wavelength (nm) of the transmitted light.
    • 具有良好的亮度和高对比度的良好的可视性的液晶显示器使用投影光学系统,其中偏光板,第一相位板和第二相位板,其中每个相位板的延迟和梯度 可以自由地设定延迟的波长色散,液晶层和反射板平行布置,透射光被反射板反射。 相位板之一的梯度被设定为非常陡峭的梯度,另一相位板的梯度被设置为非常平坦的梯度,并且从液晶层和两相获得的延迟复合值的波长色散 板近似为由(0.25 + 0.5n)lambd的关系式表示的延迟曲线,其中(n)为整数,lambd为透射光的波长(nm)。