A method of despreading a target spread spectrum signal containing pseudorandom noise code sequences modulated by a data message is disclosed. The mechanism includes a cylinder defining a cylinder chamber with a circular or elliptical cross-sectional shape. Also, independently of the duty controls over Power MOSFETs, i. When the phase retarder film is mounted with a positional error, adjacent pixel electrodes in the same pixel row can have the same light-passing area relative to the phase retarder rows having wave-shaped sides so as to avoid a color washout problem.