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    • 2. 发明授权
    • System, method, and an article of manufacture for starting a brushless direct current motor
    • 用于启动无刷直流电动机的系统,方法和制造
    • US06995530B2
    • 2006-02-07
    • US10830348
    • 2004-04-22
    • Jeffrey R. BiamonteRaymond J. HarringtonTimothy Trifilo
    • Jeffrey R. BiamonteRaymond J. HarringtonTimothy Trifilo
    • H02P3/18
    • H02P6/185
    • A system and a method for starting a brushless DC motor are provided. The method includes applying commutation pulses to at least two phase coils to induce a rotor to rotate to a starting position and then de-energizing the at least two phase coils. The method further includes applying commutation pulses to at least two phase coils to induce the rotor to rotate from the starting position in a predetermined direction. The method further includes de-energizing all phase coils for a first time interval after the rotor is rotating and sampling a back EMF signal in at least one of the phase coils to determine a first value indicative of an electrical period of the back EMF signal or a portion of an electrical period of the back EMF signal. Finally, the method includes applying commutation pulses to at least two phase coils for a second time interval, the second time interval being based on the first value.
    • 提供了一种启动无刷直流电动机的系统和方法。 该方法包括将换向脉冲施加到至少两个相位线圈以引起转子旋转到起始位置,然后使至少两个相位线圈断电。 该方法还包括将换向脉冲施加到至少两个相位线圈以引导转子沿预定方向从起始位置旋转。 该方法还包括在转子旋转之后的第一时间间隔内使所有相线圈断电,并在至少一个相位线圈中采样反电动势信号,以确定表示反电动势信号的电周期的第一值,或 反电动势信号的电气周期的一部分。 最后,该方法包括对第二时间间隔的至少两个相位线圈施加换向脉冲,第二时间间隔基于第一值。
    • 3. 发明申请
    • Stereographic projection apparatus with passive eyewear utilizing a continuously variable polarizing element
    • 具有被动眼镜的立体投影仪利用连续可变的偏振元件
    • US20070139519A1
    • 2007-06-21
    • US11314379
    • 2005-12-21
    • Casimer DeCusatisTimothy Trifilo
    • Casimer DeCusatisTimothy Trifilo
    • H04N15/00
    • G02B27/26H04N13/337H04N13/359H04N13/363H04N13/398
    • An apparatus and method for stereoscopic 3D image projection and viewing using a single projection source, polarization modulation, and passive eyewear. This approach is applicable to frame sequential video created using existing 3D graphics APIs, as well as other video signal formats, and is compatible with existing digital light processor (DLP) technology for both front and rear projection systems. An alternating polarizer is used to modulate the projected image, and an electronic control circuit is described which can stabilize the alternating polarizer in both frequency and phase lock with a DLP visual signal (as an alternate embodiment, a frequency lock with a fixed phase offset may be employed). A preferred embodiment enables an existing DLP projection system to be enhanced with 3D capability, while an alternate embodiment allows this capability to be integrated into the design of new DLP based projection systems.
    • 用于使用单个投影源,偏振调制和被动眼镜的立体3D图像投影和观看的装置和方法。 这种方法适用于使用现有3D图形API以及其他视频信号格式创建的帧顺序视频,并且与用于前置投影系统和后置投影系统的现有数字光处理器(DLP)技术兼容。 使用交替的偏振器来调制投影图像,并且描述了可以使用DLP视觉信号在频率和相位锁定中稳定交替偏振器的电子控制电路(作为替代实施例,具有固定相位偏移的频率锁定 被雇用)。 优选实施例使得能够利用3D能力来增强现有的DLP投影系统,而替代实施例允许将该能力集成到新的基于DLP的投影系统的设计中。
    • 6. 发明申请
    • System and method for high voltage bidirectional communications interface
    • 高压双向通信接口的系统和方法
    • US20060075170A1
    • 2006-04-06
    • US10954750
    • 2004-09-30
    • Eileen BehrendtJeffrey BiamonteRaymond HarringtonRobert SchlakTimothy Trifilo
    • Eileen BehrendtJeffrey BiamonteRaymond HarringtonRobert SchlakTimothy Trifilo
    • G06F13/00
    • G06F13/4291
    • A system and method for providing an interface between a master device referenced at a first voltage and a slave device referenced at a second voltage. The system includes a bidirectional communications link between the master device and the slave device and a bidirectional transceiver device in the communications link for decomposing bidirectional signals on the communications link into transmissions from the slave device to the master device onto a first bus, and transmissions from the master device to the slave device onto a second bus. A first isolation device is included in the bidirectional link and connected to the first bus for transmitting signals over the bidirectional link from the master device referenced at the first voltage to the slave device referenced at the second voltage. A second isolation device in also included in the bidirectional link and connected to the second bus for transmitting signals over the bidirectional link from the slave device referenced at the second voltage to the master device referenced at the first voltage.
    • 一种用于在以第一电压参考的主设备和以第二电压参考的从设备之间提供接口的系统和方法。 该系统包括主设备和从设备之间的双向通信链路和通信链路中的双向收发器设备,用于将通信链路上的双向信号分解成从从设备到主设备到第一总线的传输,以及从第 主设备到从设备到第二总线。 第一隔离装置包括在双向链路中并且连接到第一总线,用于通过双向链路从第一电压参考的主设备传送信号到以第二电压参考的从设备。 第二隔离装置还包括在双向链路中并连接到第二总线,用于通过双向链路从第二电压参考的从设备向第一电压所参考的主设备发送信号。
    • 8. 发明申请
    • System, method, and an article of manufacture for starting a brushless direct current motor
    • 用于启动无刷直流电动机的系统,方法和制造
    • US20050237017A1
    • 2005-10-27
    • US10830348
    • 2004-04-22
    • Jeffrey BiamonteRaymond HarringtonTimothy Trifilo
    • Jeffrey BiamonteRaymond HarringtonTimothy Trifilo
    • H02P1/46H02P6/18
    • H02P6/185
    • A system and a method for starting a brushless DC motor are provided. The method includes applying commutation pulses to at least two phase coils to induce a rotor to rotate to a starting position and then de-energizing the at least two phase coils. The method further includes applying commutation pulses to at least two phase coils to induce the rotor to rotate from the starting position in a predetermined direction. The method further includes de-energizing all phase coils for a first time interval after the rotor is rotating and sampling a back EMF signal in at least one of the phase coils to determine a first value indicative of an electrical period of the back EMF signal or a portion of an electrical period of the back EMF signal. Finally, the method includes applying commutation pulses to at least two phase coils for a second time interval, the second time interval being based on the first value.
    • 提供了一种启动无刷直流电动机的系统和方法。 该方法包括将换向脉冲施加到至少两个相位线圈以引起转子旋转到起始位置,然后使至少两个相位线圈断电。 该方法还包括将换向脉冲施加到至少两个相位线圈以引导转子沿预定方向从起始位置旋转。 该方法还包括在转子旋转之后的第一时间间隔内使所有相线圈断电,并在至少一个相位线圈中采样反电动势信号,以确定表示反电动势信号的电周期的第一值,或 反电动势信号的电气周期的一部分。 最后,该方法包括对第二时间间隔的至少两个相位线圈施加换向脉冲,第二时间间隔基于第一值。