Anti-theft system for motor vehicle, includes method of blocking windscreen transparency, either electrically or application of coating, to prevent driving of vehicle

摘要

The system uses the opacity of windscreen glass as a visible deterrent to theft. This can be done by using a special glass for the windscreen for which the reversible passage of light may be controlled, or by changing the optical properties of the glass when subjected to radiation. The anti-theft system for a vehicle operates by rendering driving of the vehicle impossible, as a result of blocking the transparency of the windscreen. The transparency may be blocked by various means, such as the projection of an opaque film of material on to the windscreen which modifies its transparency. Alternatively the windscreen may be made of special glass for which the reversible passage of light may be controlled. A further option is the control of the windscreen transparency by projecting radiation on to the screen and thus affecting its optical properties. Other windows may also be affected, and the system may be electronically controlled.