Method for operating a discharge lamp and discharge lamp
AssigneeOSRAM GmbH
InventorsBernd KOCH, Michael HEISE, Sascha PILTZ, Kai WOLTER
Life of this patent
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Abstract
The invention describes a method for operating a discharge lamp by adapting a current signal. A distribution function is defined for gathering several time span values that define several different time spans. The several time span values are determined depending on the distribution function by one or more random numbers. The current signal is commutated at every instant of time according to an expiry of each of the several time spans. A light apparatus is provided with a control unit to perform any method.
Claims19
A method for operating a discharge lamp by adapting a current signal by performing the following steps:
- (a) defining and/or providing a distribution function for gathering several time span values that define several different time spans,
- (b) determining the several time span values depending on the distribution function by one or more random numbers, and
- (c) commutating the current signal at every instant of time according to an expiry of each of the several time spans.
A lighting apparatus comprising
- a discharge lamp with an arc tube with a pair of electrodes,
- a ballast unit for providing a current signal for the discharge lamp and
- a control unit that is configured to
- define and/or provide a distribution function for gathering several time span values that define several different time spans,
- determine the several time span values depending on the distribution function by one or more random numbers, and
- commutate the current signal at every instant of time according to an expiry of each of the several time spans.
Dependencies are inferred from the claim text.