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US 2014/0176914 A1Published application
Lighting Device Comprising Pump Light Source, Phosphor Arrangement and Filter Arrangement
AssigneeOSRAM GmbH
InventorJuergen MUELLER
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Abstract
A lighting device (1) comprising a pump light source, wherein the spectral composition of the useful light of the lighting device can be controlled by the control of the phase relationship between a rotating phosphor wheel and a filter wheel rotating synchronously therewith. The control of the phase relationship controls the temporal overlap of the conversion light coming from a phosphor element of the phosphor wheel with a filter element of the filter wheel, i.e. the extent of the spectral filtering of the conversion light by the filter element.
Claims14
A lighting device, comprising:
- a. a pump light source;
- b. a phosphor arrangement,
- i. wherein the phosphor arrangement has at least one phosphor element which can be irradiated with the pump light of the pump light source and re-emits said pump light at least partly in a wavelength-converted manner, and
- ii. wherein the phosphor arrangement is arranged in a moveable manner in a beam path of the pump light source;
- c. a filter arrangement,
- i. wherein the filter arrangement has at least one filter element which can be irradiated with the wavelength-converted light;
- and
- ii. wherein the filter arrangement is arranged in a moveable manner in a beam path of the wavelength-converted light;
- d. a movement unit which is configured to move the phosphor arrangement and the filter arrangement with a fixed phase relationship between the at least one phosphor element and the at least one filter element;
- and
- e. a phase control unit for controlling the phase relationship between the at least one moving phosphor element and the at least one moving filter element.
8 more elements
Dependencies are inferred from the claim text.