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    • 3. 发明授权
    • System and method for improving the multiplexing capability of a liquid
crystal display and providing temperature compensation therefor
    • 提高液晶显示器的复用能力并提供温度补偿的系统和方法
    • US4462027A
    • 1984-07-24
    • US121951
    • 1980-02-15
    • William W. Lloyd
    • William W. Lloyd
    • G02F1/133G09G3/36G09G3/18
    • G02F1/133382G09G3/3622G09G3/3681G09G2320/041
    • A system and method for controlling the effective root mean square (RMS) voltage (Veff) across the segments of a liquid crystal display as a function of the frequency of the voltage signal applied thereto and selected parameters of the display package are described. Display parameters such as the thickness of the barrier dielectric layer and the electrical resistance of the liquid crystal material are chosen so that the ON and OFF states of the display are selectively controllable by lowering the frequency of the drive voltage signal applied to the OFF segments (Foff) a predetermined amount below that of the drive voltage signal applied to the ON segments (Fon), thereby decreasing the ratio of the effective RMS voltage Veff to the RMS voltage of the applied voltage signal (Vapp) for the OFF segments as compared to the ratio Veff/Vapp for the ON segments. The number of drive lines which can be effectively multiplexed is thereby increased. By proper selection of drive frequencies and other display parameters, temperature compensation without the need for additional sensors and circuitry is also achieved.
    • 描述了作为施加到其上的电压信号的频率和显示包的选定参数的函数的用于控制液晶显示器的段的有效均方根(RMS)电压(Veff)的系统和方法。 选择诸如屏障介电层的厚度和液晶材料的电阻的显示参数,使得通过降低施加到OFF段的驱动电压信号的频率来选择性地控制显示器的ON和OFF状态( Foff),其预定量低于施加到ON段(Fon)的驱动电压信号的预定量,从而减小与段分压相比,OFF段的有效RMS电压Veff与施加电压信号(Vapp)的RMS电压的比率 ON段的Veff / Vapp比。 从而可以有效地多路复用的驱动线的数量增加。 通过适当选择驱动频率和其他显示参数,也可实现温度补偿,无需额外的传感器和电路。
    • 4. 发明授权
    • Crystal growth combining float zone technique with the water cooled RF
container method
    • 水晶生长结合浮法技术与水冷RF容器法
    • US3936346A
    • 1976-02-03
    • US428266
    • 1973-12-26
    • William W. Lloyd
    • William W. Lloyd
    • C30B13/20C30B15/02C30B15/10C30B15/14B01J17/10
    • C30B15/02C30B13/20C30B15/10C30B15/14Y10S117/90
    • The disclosure relates to the growth of single crystal material from polycrystalline material by combining the pedestal and cold crucible techniques to yield a method of producing large, high purity single crystals on a commercial scale. The method includes feeding a bar of polycrystalline material, such as silicon, into a cold cage which can be a cold silver crucible or the like having an aperture in the bottom thereof to permit insertion of the polycrystalline feed bar. An RF coil surrounds the cold cage and melts the silicon as it reaches into the cage, the RF coil providing a temperature to the silicon material which is slightly above the melting point thereof. A rod of single crystal material, the same as the feed bar, is positioned in the melt from the top surface of the cold cage and acts as a seed crystal. The single crystal rod is then pulled upwardly from the cage while polycrystalline silicon is fed into the cage through the aperture in the bottom thereof. By continuously forcing the polycrystalline rod into the cage and pulling a rod at the top of the cage, a large single crystal can be grown while maintaining only a small melt volume. The diameter of the single crystal rod being pulled will have a relation to the upper diameter of the cold cage as well as the ratio of the feed rate of the polycrystalline bar relative to the pull rate of the single crystalline bar.
    • 本公开涉及通过组合基座和冷坩埚技术从多晶材料生长单晶材料,以产生在商业规模上生产大的高纯度单晶的方法。 该方法包括将诸如硅的多晶材料棒放入冷笼中,该冷笼可以是在其底部具有孔的冷银坩埚等以允许多晶进料棒的插入。 RF线圈围绕冷笼并在硅到达保持架时熔化硅,RF线圈向硅材料提供略高于其熔点的温度。 与进料棒相同的单晶材料棒从冷笼的顶表面定位在熔体中并用作晶种。 然后将单晶棒从保持架向上拉,而多晶硅通过其底部的孔进入保持架。 通过将多晶棒连续地强制进入保持架并拉动保持架顶部的杆,可以生长大的单晶,同时只保持较小的熔体体积。 被拉动的单晶棒的直径将与冷笼的上直径以及多晶棒的进料速率相对于单晶棒的拉伸速率的比率有关。