Patent MX-362936-B (MX)
Title: Transparent pane having an electrical heating layer, method for the production thereof, and use thereof.
Inventor: GÜNTHER SCHALL
IPC: H05B3/12
Filed: 2015-06-26
Abstract: The invention relates to a transparent pane (1), comprising at least one heatable, electrically conductive coating (8), which is connected to at least two collection electrodes (11, 11'), which are provided for electrically connecting to the two poles of a voltage source, in such a way that, by applying a supply voltage, a heating current flows across a heating field (12) formed between the at least two collection electrodes, - the heating field (12) having at least one communication window (14) free from the heatable, electrically conductive coating (8), - the heatable, electrically conductive coating (8) being bounded by a peripheral coating edge (10) and a peripheral edge strip (9), which is free from the electrically conductive coating (8) and extends to the peripheral pane edge (5), characterized in that the transparent pane (1) - has, outside of the heating field (12) and spatially separated therefrom by a collection electrode (11 or 11') and along a first side (6 or 6') of the pane edge (5), at least one heatable, electrically conductive coating (8' or 8'''), - at least two additional electrodes (18, 18') being arranged in the region of each of the two sides (7, 7') of the pane edge (5), - which additional electrodes are connected to a collection electrode (11 or 11') by means of at least one current supply line (15, 15') in each case, - which at least one current supply line extends along the associated coating edge (10) and along the two second sides (7, 7') of the pane edge (5) at least in some segments - in the associated edge strip (9), - on the associated partial piece of the peripheral coating edge (10), electrically decoupled from the heating field (12) by at least one associated coating-free line (16 or 16') in each case, and/or - in and/or on the associated electrically conductive coating (8'') outside of the heating field (12), electrically decoupled from the heating field (12) by at least one associated coating-free line (16) or (16') in each case, and the transparent pane contains - in the electrically conductive coating (8' or 8''') - at least one counter electrode (19), which is electrically associated with the two additional electrodes (18 and 18') and which is electrically coupled to the collection electrode (11 or 11') of opposite polarity, and - at least two systems (16") of at least four coating-free lines each, said systems lying opposite each other as a mirror image of each other with respect to the vertical center line and the mirror axis (M) of the transparent pane (1), said lines being arranged in such a way that said lines direct the heating current, which flows from at least two additional electrodes (18, 18') when a supply voltage is applied, over at least two current paths (a1 and a2 + a3) and via the at least two counter electrodes (19) associated therewith to the at least one collection electrode (11 or 11') of opposite polarity, - equation I: VH1 = length a1 : (length a2 + a3) = 0.05 to 2.5 (I) applying to the length of the current paths (a1 and a2 + a3) in a system (16"), (VH1) standing for the mathematical relationship, (a1) standing for the current paths between the upper additional electrodes (18, 18') and the upper partial regions closest thereto and associated therewith of the vertical legs of the second partial regions of the two-part counter electrodes (19), (a2) standing for the current paths between the lower additional electrodes (18, 18') and the upper partial regions associated therewith of the first vertical partial regions of the two-part counter electrodes (19), and (a3) standing for the current paths between the lower partial regions of the first vertical partial regions of the two-part counter electrodes (19) and the further vertical partial regions associated therewith of the second partial regions of the two-part counter electrodes (19).