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AssigneeOsram Gesellschaft Mit Beschraenkter Haftung
InventorsOlaf Busse, Bernhard Schemmel
Estimating the term…
An electronic ballast for an electrical lamp (2) provided with a first (21) and a second filament (22), includes a heating device which is used to heat the filaments (21, 22) and includes a resonance circuit (5), and an evaluation unit (11) designed for the evaluation of at least one measuring value of an electrical parameter during pre-determinable adjustments of operating conditions of the resonance circuit (5). The number of filaments (21, 22) of the electrical lamp (2) in electrical contact with the electronic ballast (1) can be identified according to the measuring value, and the electrical lamp (2) can be switched on by the electronic ballast (1) according to the identified number. A method for operating an electrical lamp by an electronic ballast is also described.
An electronic ballast for an electrical lamp comprising:
A method for operating an electrical lamp by means of an electronic ballast, the electrical lamp having a first lamp filament and a second lamp filament, and the electronic ballast comprising a heating apparatus with a resonant circuit for heating the lamp filaments, the resonant circuit having a primary inductor and two secondary inductors forming a secondary side of a transformer in conjunction with the primary inductor of the resonant circuit wherein at least one value of an electrical parameter given predetermined settings of operating conditions of the resonant circuit is measured and evaluated by an evaluation unit of the electronic ballast, and the measured value is used to identify how many lamp filaments of the electrical lamp are in contact with the electronic ballast, and the electrical lamp is switched on by the electronic ballast depending on this number identified.
Dependencies are inferred from the claim text.