Cooling of a converter arrangement for light sources with high luminance

Abstract

A converter arrangement for light sources with high luminance is provided that includes an axially pivotable carrying wheel and a converter fixed on one side of the carrying wheel. The converter includes fluorescent materials that convert impinging light into light having a different wave length and emits the light having the different wavelength. The ratio of the total area of the converter arrangement to the area enclosed by the outer boundary curve of the converter is at least 3, preferably at least 3.5, particularly preferably at least 4.5.

What is claimed is: 
     
         1 . A converter arrangement for light sources, comprising:
 an axis that is axially pivotable; and   two wheels arranged on the axis and axially spaced apart from one another,   wherein the two wheels include a carrying wheel having a converter fixed on one side thereof and a further wheel, the converter comprising fluorescent material sufficient to convert impinging light into light having a different wave length by fluorescence and sufficient to emit the light having the different wave length, the converter being delimited by an outer boundary curve that defines an area of the converter, and   wherein the converter arrangement has a total area with a ratio of the total area to the area of the converter of at least 4.5:1.   
     
     
         2 . The converter arrangement of  claim 1 , wherein the two wheels are interconnected by a thermal bridge configured to transport heat from the carrying wheel to the further wheel. 
     
     
         3 . The converter arrangement of  claim 1 , wherein the ratio is less than 50:1. 
     
     
         4 . The converter arrangement of  claim 1 , wherein the carrying wheel comprises a material having a thermal conductivity coefficient of at least 50 W/mK. 
     
     
         5 . The converter arrangement of  claim 1 , further comprising a heat dissipation that is greater than 150 WK-1m-2*F, wherein F is the area in square meters. 
     
     
         6 . The converter arrangement of  claim 5 , wherein the heat dissipation is greater than 240 WK-1m-2*F. 
     
     
         7 . The converter arrangement of  claim 1 , wherein the carrying wheel further comprises a remaining area that does not include the converter. 
     
     
         8 . The converter arrangement of  claim 7 , wherein the remaining area is blackened. 
     
     
         9 . The converter arrangement of  claim 7 , wherein the remaining area has an emissivity ε of greater than 0.1. 
     
     
         10 . The converter arrangement of  claim 1 , wherein the converter comprises an optoceramic or silicone provided with the fluorescent material. 
     
     
         11 . The converter arrangement of  claim 1 , wherein the converter comprises optoceramic segments on the carrying wheel, and wherein the segments are secured on the carrying wheel by a method selected from a group consisting of deposition, gluing, and soldering. 
     
     
         12 . The converter arrangement of  claim 1 , wherein the carrying wheel further comprises a light reflecting surface, the converter covering the light reflecting surface. 
     
     
         13 . A light source, comprising:
 a converter arrangement having an axis that is axially pivotable and two wheels arranged on the axis and axially spaced apart from one another, wherein the two wheels include a carrying wheel having a converter fixed on one side thereof and a further wheel, the converter comprising fluorescent material sufficient to convert impinging light into light having a different wave length by fluorescence and sufficient to emit the light having the different wave length, the converter being delimited by an outer boundary curve that defines an area of the converter, and wherein the converter arrangement has a total area with a ratio of the total area to the area of the converter of at least 4.5:1;   a light emitting element that emits the impinging light as a light spot on the converter; and   a motor that rotates the converter arrangement during illumination by the light emitting element so that the light spot is distributed on a circular track on the converter after one turn of the converter arrangement.   
     
     
         14 . The light source of  claim 13 , wherein the light emitting element comprises a laser. 
     
     
         15 . The light source of  claim 13 , wherein the circular track has a diameter that is at least 0.8 times a diameter of the outer boundary curve. 
     
     
         16 . A converter arrangement for light sources, comprising
 a carrying wheel having a total area, the carrying wheel arranged on an axis and axially pivotable about an axis of rotation, the axis of rotation extending along the axis, wherein the carrying wheel is a fan wheel;   a converter fixed on one side of the carrying wheel, the converter comprising fluorescent material sufficient to convert impinging light into light having a different wave length by fluorescence and sufficient to emit the light having the different wave length, the converter being delimited by an outer boundary curve that defines an area of the converter, wherein the outer boundary curve has a smaller diameter than a perimeter of the carrying wheel; and   a ratio of the total area to the area of the converter that is at least 4.5:1.   
     
     
         17 . The converter arrangement of  claim 16 , wherein the fan wheel is configured to suck in air in axial direction during rotation. 
     
     
         18 . The converter arrangement of  claim 17 , wherein the fan wheel is configured so that the air is sucked in the axial direction from a side facing away from the converter. 
     
     
         19 . The converter arrangement of  claim 16 , wherein the carrying wheel comprises a first part that is a partially blackened mirror carrier and a second part that comprises a fan and cooling lamellae. 
     
     
         20 . A light source, comprising:
 a converter arrangement for light sources having a carrying wheel defining a total area, the carrying wheel is arranged on an axis and is axially pivotable about an axis of rotation, the axis of rotation extends along the axis, the carrying wheel is configured as a fan wheel;   a converter fixed on one side of the carrying wheel, the converter comprising fluorescent material sufficient to convert impinging light into light having a different wave length by fluorescence and sufficient to emit the light having the different wave length, the converter being delimited by an outer boundary curve that defines an area of the converter, wherein the outer boundary curve has a smaller diameter than a perimeter of the carrying wheel;   a ratio of the total area to the area of the converter that is at least 4.5:1;   a light emitting element that emits the impinging light as a light spot on the converter; and   a motor that rotates the converter arrangement during illumination by the light emitting element so that the light spot is distributed on a circular track on the converter after one turn of the converter arrangement.