| 摘要 |
<p>A transparent heating plate is provided with a transparent plate assembly composed of a first transparent plate, second transparent plate superposed on the first plate, and a transparent insulating material interposed between the first and second plates and a housing which holds the periphery of the assembly. A transparent heating element (transparent conductive film) is provided to either or both of the first and second plates. A first transparent heating plate is provided with a first transparent heating element, a pair of electrodes for the first heating element which are in contact with the heating element and face the first heating element, a second transparent heating element, and a pair of electrodes for the second heating body which are in contact with the second heating element and face the second heating element. The center line of the electrodes for the second heating element is nearly perpendicular to that of the electrodes for the first heating element. A second transparent heating plate is provided with a transparent heating element and a pair of electrodes for the heating element which are in contact with the heating element and face the heating element. The periphery of the transparent plate includes a portion which extends around the periphery, and the electrodes are spaced from the periphery of the above-mentioned transparent plate assembly, inside the periphery. A third transparent heating plate is provided with a first transparent conductive film having heating electrodes and a second transparent conductive film facing the first film and connected to an earthing conductor. A fourth transparent heating plate has a circular shape, a transparent conductive film provided with heating electrodes and so formed that the resistance between the end of one electrode and that of the other electrode near the end of the first-mentioned electrode is nearly equal to the resistance between the central part of the one electrode and that of the other electrode.</p> |
