Illumination Device Comprising A Phosphor Arrangement And A Laser

a technology of illumination device and laser, which is applied in the direction of lighting and heating apparatus, light source combination, instruments, etc., can solve the problems of reducing the conversion efficiency of red phosphors compared with yellow and green phosphors, and imposing limits on the luminous flux and luminances that can be achieved with larp technology, so as to achieve improved luminous flux and high luminance

Inactive Publication Date: 2015-06-18
OSRAM GMBH
View PDF9 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]The object of the present invention is to provide a lighting device on the basis of LARP technology having an improved luminous flux and high luminance for at least one light color.

Problems solved by technology

What is disadvantageous is that red phosphors have a lower conversion efficiency in comparison with yellow and green phosphors if they are irradiated with laser radiation having high surface power densities (e.g. 10-50 W / mm2).
As a result, for red light, in particular, limits are imposed on the luminous fluxes and luminances that can be achieved with LARP technology.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Illumination Device Comprising A Phosphor Arrangement And A Laser
  • Illumination Device Comprising A Phosphor Arrangement And A Laser
  • Illumination Device Comprising A Phosphor Arrangement And A Laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034]Identical reference signs in different exemplary embodiments hereinafter denote features that are identical or of identical type.

[0035]FIG. 1 shows, as a schematic sectional illustration in side view, a lighting device 1 comprising a phosphor wheel 2, which is rotatable about a rotation axis W, as indicated by the curved arrow. FIG. 2 shows in plan view one possible embodiment of the phosphor wheel 2. The lighting device 1 is suitable for example for application in a video projector with an image generating unit having the color channels red (r), green (g) and blue (b).

[0036]The phosphor wheel 2 comprises three luminous regions 31, 32 and 33 embodied as adjacent ring segments on a ring that is concentric with respect to the rotation axis W. The lighting device 1 furthermore comprises a first laser 5 for irradiating the three luminous regions 31 to 33 and also a second laser 6 for irradiating in each case only the luminous region 31 (R), which both irradiate a top side O of the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A lighting device comprising a phosphor arrangement (2) having a phosphor region; (31-33), a first laser (5) for irradiating a part of the phosphor region (31-33) with a first laser radiation; wherein the phosphor region (31-33) comprises at least one phosphor which can be irradiated by the first laser radiation and re-emits said first laser radiation at least partly in a manner wavelength-converted into colored light having a first light color; a second laser (6) configured for emitting a second laser radiation having a second light color, wherein the second light color of the second laser radiation is identical in color to the first light color of the wavelength-converted colored light; and wherein the lighting device is configured to simultaneously emit the second laser radiation and the wavelength-converted colored light of identical color emitted by the phosphor.

Description

TECHNICAL FIELD[0001]The invention relates to a lighting device comprising at least one laser and a phosphor arrangement that is irradiated by the laser radiation of the at least one laser. Furthermore, the invention relates to a method for operating said lighting device.[0002]The invention is applicable in particular to projection devices, for example for film and video projecting gear in industrial and medical image recognition, in technical and medical endoscopy, for lighting effects in the entertainment industry, for medical irradiations and in the automotive sector, in particular for headlights for motor vehicles.PRIOR ART[0003]Light sources having a high luminous flux and a high luminance are employed in a wide variety of fields, for instance in endoscopy and likewise in projection apparatuses, wherein gas discharge lamps are currently the most widely used for this purpose. In lighting applications, for example projection or endoscopy, on the basis of LARP (“Laser Activated Re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(United States)
IPC IPC(8): F21K99/00F21V7/00F21V9/40
CPCF21K9/56F21Y2113/005F21Y2101/025F21V7/0091F21K9/64G03B21/204G03B33/08G03B33/12F21Y2115/10F21Y2113/13F21Y2115/30F21Y2101/00F21S41/16F21V5/04F21V13/14F21V9/45F21V9/35F21V3/08F21V9/08F21V14/08G02B26/008
Inventor HOEHMANN, PETER
Owner OSRAM GMBH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap