An exterior rearview mirror system for a vehicle comprises an exterior mirror assembly having a fixed portion and a movable portion. In the photoinduced switching liquid crystal device, in-plane switching of an optical anisotropic axis of dichroic nematic liquid crystal is performed at a high speed by light. The light-emitting layer produces a spectrum of light having at least a bimodal distribution of wavelengths. A feedback loop is closed by a phase comparison between the first aligned phase signal and the cycle delay signal. A resistance device is interconnected between the linkage and the frame to provide resistance to each type of exercise.