Blind slats for doorwindow Venetian blinds include a doorwindow frame made up of a plurality of side brackets wherein the left and right side brackets are provided with a plurality of retaining holes disposed at the corresponding inner sides thereon respectively for blind slats to be mounted thereby, and a linkage rod is attached at the same side of the blind slats thereon. The glazing panel according to the invention is preferably a side window which may be used for de-misting or de-icing purposes. Then, a light shielding portion is formed so as to be laminated on the insulating film and to have a convex shape protruding to the semiconductor substrate at a location corresponding to the trench. The floating electrode increases current density in the region of the probe distal end. Only then is the receptacle powered, after which the appliance can be used normally. When a precise cancellation occurs, the existing winding current is known to be in exact proportion to the reference current.