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    • 5. 发明申请
    • Method and Apparatus for Display
    • 显示方法和装置
    • US20070152927A1
    • 2007-07-05
    • US11671712
    • 2007-02-06
    • Stephen Marshall
    • Stephen Marshall
    • G09G3/34
    • G02B7/1821G09G3/007H04N9/312
    • According to one embodiment, a method for providing position feedback for a device includes providing a photointerrupter having a light-emitting diode, a phototransistor, and an aperture between the light-emitting diode and the phototransistor. For a given size aperture, a current through the phototransistor is a function of a current through the light-emitting diode. The method also includes controlling the current through the light-emitting diode current such that a change in the effective aperture size results in a desired approximately proportional change in current through the phototransistor. While controlling the current through the light-emitting diode, a portion of the aperture is blocked by an arm that has a position indicative of the position of the device. The method also includes providing a signal indicative of the change in current through the photodiode as an indication of the change in position of the device.
    • 根据一个实施例,一种用于为器件提供位置反馈的方法包括提供具有发光二极管,光电晶体管和发光二极管与光电晶体管之间的孔径的光断续器。 对于给定尺寸的孔径,通过光电晶体管的电流是通过发光二极管的电流的函数。 该方法还包括控制通过发光二极管电流的电流,使得有效孔径尺寸的变化导致通过光电晶体管的电流的期望的大致成比例的变化。 在控制通过发光二极管的电流的同时,孔的一部分由具有指示装置位置的位置的臂阻挡。 该方法还包括提供指示通过光电二极管的电流变化的信号作为设备位置变化的指示。
    • 6. 发明申请
    • Method and Apparatus for Controlling the Positioning of an Optical Dithering Element
    • 用于控制光学抖动元件的定位的方法和装置
    • US20070052968A1
    • 2007-03-08
    • US11554078
    • 2006-10-30
    • Stephen Marshall
    • Stephen Marshall
    • G01C19/64
    • G02B26/0833G09G3/007G09G3/346
    • According to one embodiment, a method for controlling positioning of an optical dithering element includes repeatedly driving the optical dithering element approximately between a plurality of desired positions by a generally periodic drive waveform. During a particular period of the drive waveform, the actual position of the optical dithering element is determined at a plurality of sample times. For each of the determined actual positions of the optical dithering element, a position error indicator is determined based upon whether the magnitude of the actual position is greater than, less than, or the same as a desired setpoint for the position of the optical dithering element. The method also includes generating an error signature for the particular period based on the determined error indicators and modifying the drive waveform in response to the error signature.
    • 根据一个实施例,一种用于控制光学抖动元件的定位的方法包括通过大致周期性的驱动波形来重复地驱动光学抖动元件,其大致在多个期望位置之间。 在驱动波形的特定时段期间,在多个采样时间确定光学抖动元件的实际位置。 对于光学抖动元件的确定的实际位置中的每一个,基于实际位置的大小是否大于,小于或相同于光学抖动元件的位置的期望设定点来确定位置误差指示器 。 该方法还包括基于所确定的误差指示符产生针对特定周期的错误签名,并响应于错误签名修改驱动波形。