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US 2009/0015168 A1Published application
Flat Lighting Device
AssigneeAmcor Flexibles Kreuzlingen Ltd.
InventorsHans Layer, Martin Werner
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AssigneeAmcor Flexibles Kreuzlingen Ltd.
InventorsHans Layer, Martin Werner
Estimating the term…
A flat lighting device (10, 10′) that has light-emitting lighting elements (1) arranged on a carrier, which are connected to current supply and current discharge lines (4′) to supply current. The carrier has the form of a metallic sheet (2), which is covered with an insulating layer (3), on which in each case series connections of a lighting element (1) and a surface series resistor (5) in each case are arranged between the current supply and current discharge lines (4′). One lighting element (1) and one surface series resistor (5) of a series connection and the series connections and the current supply and current discharge lines (4′) are in each case connected to one another by conductor paths. There is also a method for producing lighting devices of this type.
1:
The lighting device according to claim 1, wherein a plurality of series connections are arranged next to one another between the current supply and current discharge lines (4′).
The lighting device according to claim 1, wherein a plurality of branches, which in each case comprise, one behind the other, a plurality of series connections of a lighting element (1) and a surface series resistor (5) in each case, are arranged between the current supply and current discharge lines (4′).
The method for producing a lighting device according to claim 1, wherein the insulating layer is applied to the metallic sheet (2) and the conductor paths (4), the current supply and discharge lines (4′), the connection contact faces (8).
The lighting device according to claim 1, wherein the metallic sheet (2) is an aluminum sheet.
The lighting device according to claim 1, wherein the insulating layer (3) is a varnish layer applied in a flat manner.
The lighting device according to claim 1, wherein the insulating layer (3) is formed by a plastics material sheet laminated onto the metallic sheet (2).
The lighting device according to claim 1, wherein the insulating layer (2) is formed by a paper web laminated on to the metallic sheet (2).
The lighting device according to claim 1, wherein the conductor paths (4), the current supply and current discharge lines (4′).
The lighting device according to claim 1, wherein the conductor paths, the current supply and current discharge lines (4′) consist of a conductive dye.
The lighting device according to claim 1, wherein the surface series resistors (5) are printed onto the surface of the insulating layer (3) by the gravure printing method.
The lighting device according to claim 1, wherein the connections (7) of the lighting elements (1) are in each case bonded to connection contact faces (7) which are arranged on conductor paths (4) with a conductive adhesive, or soldered.
The lighting device according to claim 1, wherein the lighting elements (1) are light-emitting diodes.
The lighting device according to claim 1, wherein the body part (9) of a fixed lighting element (1) is seated on a contact connection face (8) located therebelow, so that good heat dissipation takes place from the body part (9) to the metallic sheet (2).
The lighting device according to claim 1, wherein a stabilizing coating (6) is arranged on the lighting elements (1) for stabilization and for mechanical fixing thereof and also covers the regions of the connections (7) of the lighting elements (1) and of the connection contact faces (8), but leaves the light-emitting front side of the lighting elements (1) free.
The lighting device according to claim 1, wherein a stabilizing metallic composite part (14) is fastened to the side of the metallic sheet (2) remote from the lighting elements (1).
The lighting device according to claim 1, wherein the conductor paths (4), the current supply and current discharge lines (4′) and the potential equalization lines (4′) are printed onto the surface of the insulating layer (3) by a gravure printing method.
Dependencies are inferred from the claim text.