Abstract: An automatic, dynamic window anti freezing system for the windshield and the rear window of a motor vehicles parked in cold weather, connected to a battery, comprises a temperature range control-switch unit, an optic frost-monitor, and a sweeping time (frequency)- control to drive a wiper system to work for preventing frost accumulating on the window glass. The temperature unit sets up a certain working range to turn on the system, covering the real freezing stage of the windows. The sweeping time control sets up predetermined sweeping timely manner for the wipers to sweep. The monitor emits light signals to monitor the frost accumulating on the window glass, and actuates the sweeping control to drive wipers to sweep it off when detecting it. The energy consumption is generally exceptional low due to that working is effectively controlled and easily done. Thus a related window is substantially able to avoid freezing on.

Abstract: A dual function sleep preventing system comprises a micro optic eyelid monitor, a micro optic tilting monitor, a signal combination circuits and an alarming unit. The eyelid monitor is placed in the vicinity of an eye by an appropriate mounting device when in use, using an emitter to transmit modulated appropriate light signals towards the eye, and using optic sensors to sense the influenced light by the eyelid, to detect the movement of eyelid. The tilting monitor comprises an optic tilt switch set on the side head of a user, using a micro optic monitor to detect a small ball's rolling in a closed tube system inside the switch when tilting. Both the monitors are connected to a signal combination circuits, which has an input signal filtering device, a switch part and a counter. The filtering device sets an appropriate time delay range to pick up dangerous long symptoms, base on signal length and the difference between a monitor signal's appearing time and another monitor's.