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    • 8. 发明授权
    • Driving method for liquid crystal electro-optical device
    • 液晶电光装置的驱动方法
    • US5459481A
    • 1995-10-17
    • US50241
    • 1993-07-02
    • Takaaki TanakaYuzuru Sato
    • Takaaki TanakaYuzuru Sato
    • G02F1/133G09G3/20G09G3/36
    • G09G3/3633G09G2310/06G09G2310/061G09G3/2011
    • A time-sharing addressing method for an antiferroelectric phase liquid crystal element that demonstrates tristable switching behavior, wherein the drive voltage waveform is made an alternating current and the time average value of the voltage, including the depolarization field due to spontaneous polarization of the liquid crystal, actually applied to the liquid crystal substance in one frame or two frames is made zero for the purpose of expanding the drive voltage margin and the operating temperature margin of the element, shortening the screen scanning time and preventing degradation of the electro-optical characteristic by suppressing polarization of the electric charge due to spontaneous polarization of the liquid crystal. Also, by providing the blanking period required for relaxation from a ferroelectric phase to an antiferroelectric phase in the non-selection period, the time required for screen scanning is shortened, and by changing the length of the blanking period according to the temperature dependence of the response-relaxation time, the operating temperature margin is expanded.
    • PCT No.PCT / JP92 / 00411 Sec。 371日期:1993年7月2日 102(e)日期1993年7月2日PCT 1992年4月3日提交PCT。一种反铁电相液晶元件的分时寻址方法,其表现出三重切换行为,其中驱动电压波形为交流电,时间 在一帧或两帧中实际施加到液晶物质的包括由于液晶的自发极化引起的去极化的电压的平均值为零,以扩大驱动电压余量和工作温度裕度 元件,通过抑制由于液晶的自发极化引起的电荷的偏振,缩短了屏幕扫描时间并防止了电光特性的劣化。 此外,通过在非选择期间中提供从铁电相放电到反铁电相所需的消隐期,屏幕扫描所需的时间缩短,并且通过根据温度依赖性改变消隐周期的长度 响应弛豫时间,工作温度裕度扩大。
    • 10. 发明授权
    • Projection-type display apparatus
    • 投影型显示装置
    • US08130331B2
    • 2012-03-06
    • US12821374
    • 2010-06-23
    • Takaaki Tanaka
    • Takaaki Tanaka
    • G02F1/1335
    • G03B21/006G02B27/26G02B27/283H04N13/324H04N13/337H04N13/363
    • Provided are an illumination optical system allowing light beams to be condensed and enter an illumination area at different angles from each other, color separating elements that separate colors of the light beams from the illumination optical systems, liquid crystal light valves that modulate the color lights to form image light for the right and the left eyes, a color combining element that combines the color light beams, a wavelength-selective polarization rotating element that rotates the polarization direction of a predetermined color light so as to align the polarization direction with that of a light beam of another color, and a projection lens that magnifies and projects images. The liquid crystal light valves are provided with an incident side microlens array that causes the light beams for the right and the left eyes to pass respectively through the right and the left eye image pixels, and an exit side microlens array that condenses the light that has passed through the pixels. The projection lens is provided with a polarized light separating element that causes the polarization directions of image light for the right and the left eyes to be orthogonal to each other. Using one projection-type display apparatus, a highly efficient stereoscopic image can be displayed with little flicker and cross talk of image light for the right eye and for the left eye.
    • 提供了一种照明光学系统,其允许光束被聚光并且以彼此不同的角度进入照明区域,将来自照明光学系统的光束的颜色分离的分色元件,将颜色调制的液晶光阀 形成用于右眼和左眼的图像光,组合彩色光束的颜色组合元件,使预定颜色光的偏振方向旋转的波长选择性偏振旋转元件,以使偏振方向与 另一种颜色的光束,以及放大和投影图像的投影透镜。 液晶光阀设有入射侧微透镜阵列,其使右眼和左眼的光束分别通过右眼图像像素和左眼图像像素,以及出射侧微透镜阵列,其使具有 通过像素。 投影透镜设置有使得右眼和左眼的图像光的偏振方向彼此正交的偏振光分离元件。 使用一个投影型显示装置,可以以少许的右眼和左眼的图像光的闪烁和串扰来显示高效的立体图像。