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    • 4. 发明授权
    • Projector
    • 投影机
    • US06315417B1
    • 2001-11-13
    • US09319534
    • 1999-06-08
    • Akitaka YajimaYasunori OgawaJiro Ito
    • Akitaka YajimaYasunori OgawaJiro Ito
    • G03B2114
    • H04N9/3105G02B27/0927G02B27/0961H04N5/7441
    • In a projection display device 1, emergent light from an illumination optical system 80 is diffused by microlenses 101 provided in a liquid crystal light valve 100R. Emergent light from the liquid crystal light valve 100R diffused by these microlenses 101 is efficiently drawn into a projection optical system 60 whose f-number is set to be less than the f-number of the illumination optical system 80. As a result, it is possible to prevent light utilization efficiency from being deteriorated due to light diffusion by the microlenses 101. Consequently, it is possible to obtain a bright projection image in a projection display device in which a liquid crystal light valve having microlenses is incorporated.
    • 在投影型显示装置1中,来自照明光学系统80的出射光被设置在液晶光阀100R中的微透镜101扩散。 由这些微透镜101扩散的来自液晶光阀100R的突发光被有效地拉入投影光学系统60,投影光学系统60的f值设定为小于照明光学系统80的f数。结果是 可以防止光利用效率由于微透镜101的光扩散而劣化。因此,可以在其中结合有具有微透镜的液晶光阀的投影显示装置中获得亮度投影图像。
    • 8. 发明授权
    • Analog electronic timepiece
    • 模拟电子表
    • US4477196A
    • 1984-10-16
    • US375649
    • 1982-05-06
    • Jiro Ito
    • Jiro Ito
    • G04C3/14G04F5/00G04B19/00
    • G04C3/143
    • A stepper rotor is driven with a narrow pulse width input which matches the load conditions on the motor. The subsequent position of the rotor is detected as being rotated or non-rotated by application of a detection pulse to the rotor. An additional driving pulse of increased width is applied should the rotor be found in a non-rotated state. A stabilizing pulse prevents intermediate rotor positioning. Position of the stepper motor is detected by passing a current through the rotor cell. The rate of increase in detection current is different when the rotor has rotated and when the rotor does not rotate because coil inductance and magnetic flux directions passing through the saturable portion of the stator are different depending upon the position of the rotor. The width of the driving pulse for normal operation is selected from a range of pulse widths so as to match the load on the motor.
    • 步进转子由狭窄的脉冲宽度输入驱动,匹配电机的负载条件。 通过向转子施加检测脉冲来检测转子的后续位置为旋转或不旋转。 如果在非旋转状态下发现转子,则应用增加宽度的附加驱动脉冲。 稳定脉冲防止中间转子定位。 通过使电流通过转子电池来检测步进电机的位置。 当转子旋转时,转子不转动,因为通过定子的可饱和部分的线圈电感和磁通方向根据转子的位置而不同,所以检测电流的增加率是不同的。 用于正常操作的驱动脉冲的宽度从脉冲宽度的范围中选择,以便匹配电动机上的负载。