초록 ▼

The present invention relates to a transparent pane with an electrically heatable coating, which extends over a major part of the surface area of the pane and is electrically connected to at least two low-impedance bus bars lying opposite one another, at least one conducting structure (4G, 5G) only

The present invention relates to a transparent pane with an electrically heatable coating, which extends over a major part of the surface area of the pane and is electrically connected to at least two low-impedance bus bars lying opposite one another, at least one conducting structure (4G, 5G) only covering the heating area outside a central viewing area, in order to shorten electrically the distance between the bus bars (4, 5), and in that the current flows in the part of the heating area that is not covered by at least one conducting structure (4G, 5G).

대표청구항 ▼

1. A transparent pane comprising an adhesive layer sandwiched between a first rigid sheet and a second rigid sheet, the transparent pane comprising: an electrically heatable coating, the electrically heatable coating extending over a major part of a surface area of the transparent pane and being ele

1. A transparent pane comprising an adhesive layer sandwiched between a first rigid sheet and a second rigid sheet, the transparent pane comprising: an electrically heatable coating, the electrically heatable coating extending over a major part of a surface area of the transparent pane and being electrically connected to at least two low-impedance bus bars lying opposite one another, andat least one electrically conductive structure, extending over the electrically heatable coating, from an edge of one of the at least two low-impedance bus bars, toward an interior section of the transparent pane,the electrically heatable coating being layered on the first rigid sheet of the transparent pane,the at least one electrically conductive structure being layered on the electrically heatable coating,the at least two low-impedance bus bars being layered on the at least one electrically conductive structure,the adhesive layer being layered over the electrically heatable coating, the at least one electrically conductive structure, and the at least two low-impedance bus bars, andthe second rigid sheet being layered on the adhesive layer,wherein during operation, current flows in a part of the heating area that is not covered by the at least one electrically conductive structure,the at least one electrically conductive structure is formed as a printed uniform pattern, the at least one electrically conductive structure being homogenous over a width of the transparent pane, wherein the printed uniform pattern is formed from a screen printing paste having a dark colour,the at least one electrically conductive structure is adapted to connect electrically to the one of the at least two low-impedance bus bars and to the electrically heatable coating,the at least one electrically conductive structure has lower resistance than the electrically heatable coating;wherein the printed uniform pattern comprises inversely circular, chequerboard, square, checked, point or zigzag pattern,wherein the printed uniform pattern comprises a covered area having a longitudinal and a lateral dimension, andwherein the at least one electrically conductive structure further comprises an uncovered area uncovered by the printed uniform pattern, wherein the covered area is equal or greater than the uncovered area. 2. The transparent pane according to claim 1, wherein lines or wires of no more than 0.5 mm, preferably no more than 0.3 mm, in width or thickness, are projected over the surface area of the transparent pane. 3. The transparent pane according to claim 1, wherein the bus bars are produced by printing and/or from metal foils. 4. The transparent pane according to claim 3, wherein the bus bars are printed onto a respective substrate before or after the electrically heatable coating is applied. 5. The transparent pane according to claim 3, wherein the bus bars are electrically connected to the electrically heatable coating and to the at least one electrically conductive structure by soldering at least at discrete contact points. 6. The transparent pane according to claim 1, wherein the at least one electrically conductive structure is a plurality of electrically conductive structures arranged at uniform or non-uniform distances from one another. 7. The transparent pane according to claim 1, wherein the at least one electrically conductive structure is a plurality of electrically conductive structures configured all with the same length or with different lengths. 8. The transparent pane according to claim 1, wherein the at least one electrically conductive structure is arranged only over part of the longitudinal extent of one or both bus bars. 9. The transparent pane according to claim 1, configured as a vehicle windscreen, wherein the at least one electrically conductive structure extends at most to the limit of a standardized viewing area of the windscreen. 10. The transparent pane according to claim 1, further comprising a tinted color strip extending at least along an upper edge of the pane, the strip covering at least partially the at least one electrically conductive structure arranged along its extension. 11. The transparent pane according to claim 1, further comprising two rigid sheets of glass and/or plastic and/or a plastic film, wherein the electrically heatable coating, the bus bars and the at least one electrically conductive structure are arranged on surface areas of the sheet that are lying inside a laminated structure defined by the transparent pane. 12. The transparent pane according to claim 1, wherein the electrically conductive structure is partially congruent with the one of the at least two low-impedance bus bars and shortens the electrical path between the at least two low-impedance bus bars. 13. The transparent pane according to claim 1, further comprising an opaque colour layer circumscribing the pane, the opaque colour layer being layered within the pane or outside of the pane. 14. The transparent pane according to claim 1, wherein the longitudinal dimension is substantially similar in value to the lateral dimension. 15. A transparent pane comprising an adhesive layer sandwiched between a first rigid sheet and a second rigid sheet, the transparent pane comprising: an electrically heatable coating, the electrically heatable coating extending over a major part of a surface area of the transparent pane and being electrically connected to at least two low-impedance bus bars lying opposite one another, andat least one electrically conductive structure, extending over the electrically heatable coating, from an edge of one of the at least two low-impedance bus bars, toward an interior section of the transparent pane,the electrically heatable coating being layered on the first rigid sheet of the transparent pane,the at least one electrically conductive structure being layered on the electrically heatable coating,the at least two low-impedance bus bars being layered on the at least one electrically conductive structure,the adhesive layer being layered over the electrically heatable coating, the at least one electrically conductive structure, and the at least two low-impedance bus bars, andthe second rigid sheet being layered on the adhesive layer,wherein during operation, current flows in a part of the heating area that is not covered by the at least one electrically conductive structure,the at least one electrically conductive structure is formed as a printed uniform pattern, wherein the printed uniform pattern is formed from a screen printing paste having a dark colour,the at least one electrically conductive structure is configured as a line, open or closed loop, straight line, arc and/or meander,the at least one electrically conductive structure is adapted to connect electrically to the one of the at least two low-impedance bus bars and to the electrically heatable coating,the at least one electrically conductive structure has lower resistance than the electrically heatable coating;wherein the printed uniform pattern comprises, inversely circular, chequerboard, square, checked, point or zigzag pattern,wherein the printed uniform pattern comprises a covered area having a longitudinal and a lateral dimension, andwherein the at least one electrically conductive structure further comprises an uncovered area uncovered by the printed uniform pattern, wherein the covered area is equal or greater than the uncovered area. 16. The transparent pane according to claim 15, wherein the electrically conductive structure is partially congruent with the one of the at least two low-impedance bus bars and shortens the electrical path between the at least two low-impedance bus bars. 17. A transparent pane comprising an adhesive layer sandwiched between a first rigid sheet and a second rigid sheet, the transparent pane comprising: an electrically heatable coating, the electrically heatable coating extending over a major part of a surface area of the transparent pane and being electrically connected to at least two low-impedance bus bars lying opposite one another, andat least one electrically conductive structure, extending over the electrically heatable coating, from an edge of one of the at least two low-impedance bus bars, toward an interior section of the transparent pane,the electrically heatable coating being layered on the first rigid sheet of the transparent pane,the at least one electrically conductive structure being layered on the electrically heatable coating,the at least two low-impedance bus bars being layered on the at least one electrically conductive structure,the adhesive layer being layered over the electrically heatable coating, the at least one electrically conductive structure, and the at least two low-impedance bus bars, andthe second rigid sheet being layered on the adhesive layer,wherein during operation, current flows in a part of the heating area that is not covered by the at least one electrically conductive structure,the at least one electrically conductive structure is formed as a printed uniform pattern, wherein the printed uniform pattern is formed from a screen printing paste having a dark colour,the at least one electrically conductive structure comprises at least one non-printed region,the at least one electrically conductive structure is adapted to connect electrically to the one of the at least two low-impedance bus bars and to the electrically heatable coating,the at least one electrically conductive structure has lower resistance than the electrically heatable coating;wherein the printed uniform pattern comprises an inversely circular, chequerboard, square, checked, point or zigzag pattern,wherein the printed uniform pattern comprises a covered area having a longitudinal and a lateral dimension, andwherein the at least one electrically conductive structure further comprises an uncovered area uncovered by the printed uniform pattern, wherein the covered area is equal or greater than the uncovered area. 18. The transparent pane according to claim 17, wherein the electrically conductive structure is partially congruent with the one of the at least two low-impedance bus bars and shortens the electrical path between the at least two low-impedance bus bars. 19. A transparent pane comprising an adhesive layer sandwiched between a first rigid sheet and a second rigid sheet, the transparent pane comprising: an electrically heatable coating, the electrically heatable coating extending over a major part of a surface area of the transparent pane and being electrically connected to at least two low-impedance bus bars lying opposite one another, andat least one electrically conductive structure, extending over the electrically heatable coating, from an edge of one of the at least two low-impedance bus bars, toward an interior section of the transparent pane,the electrically heatable coating being layered on the first rigid sheet of the transparent pane,the at least one electrically conductive structure being layered on the electrically heatable coating,the at least two low-impedance bus bars being layered on the at least one electrically conductive structure,the adhesive layer being layered over the electrically heatable coating, the at least one electrically conductive structure, and the at least two low-impedance bus bars, andthe second rigid sheet being layered on the adhesive layer,wherein during operation, current flows in a part of the heating area that is not covered by the at least one electrically conductive structure,the at least one electrically conductive structure is formed as a printed uniform pattern, wherein the printed uniform pattern is formed from a screen printing paste having a dark colour,the at least one electrically conductive structure comprises a uniform pattern with a plurality of inversely circular, chequerboard, checked structures, zigzag structures, or checks and squares surfaces,the printed uniform pattern comprises a covered are having a longitudinal and a lateral dimension,the at least one electrically conductive structure is adapted to connect electrically to the one of the at least two low-impedance bus bars and to the electrically heatable coating,the at least one electrically conductive structure has lower resistance than the electrically heatable coating, andwherein the at least one electrically conductive structure further comprises an uncovered area uncovered by the printed uniform pattern, wherein the covered area is equal or greater than the uncovered area. 20. The transparent pane according to claim 19, wherein a conductive glass coating, a printed, low-impedance electrically conductive structure, a plastic film and a nonconductive black print are contained between an inner side and an outer side. 21. The transparent pane according to claim 19, wherein the electrically conductive structure is partially congruent with the one of the at least two low-impedance bus bars and shortens the electrical path between the at least two low-impedance bus bars.