AUTOMOTIVE LAMINATE WITH INVISIBLE HEATING AND HIGH RED RATIO FOR CAMERA DEFROSTER

The use of camera-based safety systems is growing at a rapid rate in automobiles where they provide lane departure warning, collision avoidance, adaptive cruise control and other functions. For proper operation, the cameras require a clear undistorted field of view. Keeping the camera area free of snow and ice has been a problem. The lines widths of printed silver frit defroster circuits can interfere with the camera function. Transparent conductive solar control coatings and films can be used but they often result is a poor red ratio. Thin embedded wire defrosters are invisible for all practical purposes but are expensive and difficult to connect electrically. The invention provides an invisible defroster circuit that can be inexpensively produced by applying the circuit to the inside surface of glass rather than imbedding within the laminate.