Abstract:
The invention relates to a transparent pane (1) comprising at least: an electrical heating layer (6), which extends at least over part of the pane area (III) and which is divided into a main heating region (9) and an additional heating region (14) electrically insulated from the main heating region; connection means (10, 11, 12, 13, 13'), which can be electrically connected to a voltage source (25) and which comprise at least a first collecting conductor (10) and a second collecting conductor (11), wherein each collecting conductor (10, 11) is connected to the heating layer (6) in the main heating region (9) in direct contact in an electrically conductive manner in such a way that a heating current (16) flows across a heating field (17) formed by the heating layer (6) after a feed voltage has been applied; at least one electrical line heating element (15, 15'), which is arranged in the additional heating region (14) of the heating layer (6) at least in some segments, wherein the line heating element (15, 15') is connected to the heating layer (6) in direct contact in an electrically conductive manner, the line heating element (15, 15') is electrically connected to the connecting means (10, 11, 12, 13, 13') of the heating layer (6) in the main heating region (9) electrically in parallel with the heating field (17) , the line heating element (15, 15') has such an ohmic resistance that the additional heating region (14) can be heated after the feed voltage has been applied, and the line heating element (15, 15') is designed in such a way that, after the feed voltage has been applied between segments (18a, 18b) of the line heating element (15, 15'), a heating current can flow through the heating layer (6) in the additional heating region (14) and the additional heating region (14) can thereby be additionally heated.
Abstract:
The invention relates to a transparent panel having a transparent heatable coating, which extends at least over a part of the panel surface, in particular the visual field. The heatable coating is divided by at least one heatable coating-free zone into at least one first heatable coating zone and a second heatable coating zone, wherein each of the two heatable coating zones is electrically connected to at least two collecting conductors such that, after a supply voltage that is provided by a voltage source is applied, a current flows over both at least one first heating field formed by the first heatable coating zone and at least one second heating field formed by the second heatable coating zone. At least one heating element is arranged in the heatable coating-free zone, the ohmic resistance of said heating element being such that the panel can be heated in a surface area containing the heatable coating-free zone by applying the supply voltage to the heating element. The at least one heating element is designed such that, by applying the supply voltage to the heating element, the panel can also be heated in at least one surface area that adjoins the heatable coating-free zone and contains at least one of the collecting conductors.
Abstract:
A heating arrangement for electrically heating the lower section (32) of an automobile glazing unit (12) is disclosed. An embodiment of the arrangement includes a heating grid pattern (34) employing vertical shorting bars (44) to prevent complete inoperability of individual heating conductors (36). An alternate embodiment of the arrangement includes heating conductors of varying electrical resistance to achieve greater heat generation at desired locations.
Abstract:
A transparent window pane (1) comprises a main heating layer (6) and an additional heating layer (8) electrically isolated from each other, a first and a second electrode (11, 12) adapted to be electrically connected to a main power source and electrically connected directly to the main heating layer (6) such that after application of a supply voltage, a main heating current flows through the main heating layer (6) between the first and second electrodes (11, 12), and at least one conducting part (20) adapted to be electrically connected to the main power source or another power source. The conducting part (20) is interrupted by interruption zones (21), whereby the conducting part is formed of a plurality of conducting elements (22) physically separated from each other. Each conducting element (22) is electrically connected to the additional heating layer (8), such that after application of a supply voltage to the conducting part (20), an additional heating current flows through the heating layer (8) in each interruption zone (21).