Lighting circuit
AssigneeSignify Holding B.V.
InventorsReinhold Elferich, Olexandr Valentynovych Vdovin, Dominique Maria Bruls, Eugen Jacob De Mol, Hugo Johan Cornelissen, Karnekumar Arulandu, Matthias Wendt, Ties Van Bommel
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Abstract
A lighting circuit comprises a first light source arrangement and a second light source arrangement, of different types, in series. A driver delivers a controllable current to the light source circuit, with an adjustable DC component and an adjustable modulated component, for example an adjustable duty cycle of a superposed pulse width modulated component. This enables control of the contributions to the overall light output flux from the different types of light source.
Claims19
A lighting circuit, comprising:
- a light source circuit comprising a first light source arrangement, and a second light source arrangement, of a different type to the first light source arrangement, in series;
- and
- a driver for delivering a controllable current to the light source circuit, wherein the driver is configured to set a DC component of the controllable current and to set a modulation of a superposed modulated component of the controllable current, wherein the controllable current provided to the light source circuit provides a light output distribution between the first light source arrangement and the second light source arrangement,
- wherein the light source circuit receives current from the driver such that the light source circuit is adapted to receive a single current from the driver;
- wherein the first light source arrangement is an LED arrangement and the second source arrangement is a laser diode arrangement and/or a superluminescent diode arrangement.
A luminaire comprising:
- a lighting circuit, the lighting circuit comprising:
- a light source circuit comprising a first light source arrangement, and a second light source arrangement, of a different type to the first light source arrangement, in series;
- and
- a driver for delivering a controllable current to the light source circuit, wherein the driver is configured to set a DC component of the controllable current and to set a modulation of a superposed modulated component of the controllable current, wherein the controllable current provided to the light source circuit provides a light output distribution between the first light source arrangement and the second light source arrangement,
- wherein the light source circuit receives current from the driver such that the light source circuit is adapted to receive a single current from the driver,
- wherein the first light source arrangement is an LED arrangement and the second source arrangement is a laser diode arrangement and/or a superluminescent diode arrangement.
Dependencies are inferred from the claim text.