Led lamp(s) with single channel driver
AssigneePhilips Lighting Holding B.V.
InventorsYUHONG FANG, WILHELMUS JOSEPHUS CORNELISSEN, SREERAMAN VENKITASUBRAHMANIAN
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Abstract
A light emitting diode (LED) apparatus is configured for driving multiple LED lamps in parallel. The light emitting diode apparatus includes at least one of the LED lamps, and a detection circuit (151, 152) that detects presence of each of the LED driver circuit (140). The LED driver circuit adjusts power and/or current to the detected LED lamps based on the detection of presence.
Claims15
A light emitting diode (LED) apparatus configured for driving a plurality of LED lamps (Lamp 1, Lamp 2) in parallel, characterized in that it comprises:
- at least one LED driver circuit that is adapted to provide a LED driving current for the plurality of LED lamps, the LED driver circuit comprising a current setting resistance circuit for setting a maximum value of the LED driving current;
- and
- a detection circuit that is adapted to detect presence or absence of each of the plurality of LED lamps by detection of the current flowing through each of the LED lamps,
- wherein, the detection circuit is configured to adjust the current setting resistance circuit based on the detection of presence or absence.
A method for driving a plurality of LED lamps of a light emitting diode apparatus, characterized in that it comprises:
- providing a LED driving current for the plurality of LED lamps by a LED driver circuit comprising a current setting resistance circuit used to set a maximum value of the LED driving current;
- detecting presence or absence of each of the plurality of LED lamps using a detection circuit that detects the current flowing through each LED lamp, and
- adjusting the current setting resistance circuit based on detecting the presence or absence.
Dependencies are inferred from the claim text.