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AssigneeOsram Gesellchaft Mit Beschraenkter Haftung
InventorsBernhard Schemmel, Kay Schmidtmann
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The invention relates to an electronic ballast device for operating an electric lamp (2), comprising a first (21) and a second lamp filament (22), wherein the lamp filaments (21, 22) are electrically connected to a heating circuit (3) during a pre-warming phase for the electric lamp (2) said heating circuit (3) being of such a form that the heating current generated by the heating circuit (3) during an operational phase of the electric lamp (2) amounts to between 20% and 60% of the lamp current of said electric lamp (2). The invention further relates to a method for operation of an electric lamp with an electronic ballast device.
1-11. (canceled)
An electronic ballast for operating an electric lamp (2), which has a first (21) and a second lamp filament (22), the lamp filaments (21, 22) being electrically connected to a heating circuit (3) for heating purposes, characterized in that the electric lamp (2) is in the form of an amalgam fluorescent lamp, the heating circuit (3) is designed in such a way that the heating current produced by this heating circuit (3) in an operating phase of the electric lamp (2) can be dimensioned to have a value of between 20% and 60% of the lamp current of the electric lamp (2).
A method for operating an electric lamp (2) with an electronic ballast (1), which has a heating circuit (3) for heating at least one lamp filament (21, 22) of the electric lamp (2), characterized in that the heating current of the heating circuit (3) during an operating phase of the electric lamp (2) is dimensioned to have a value of between 20% and 60% of the lamp current of the electric lamp (2).
Dependencies are inferred from the claim text.