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Light converting device with confined light converter

An optical converter and optical conversion technology, which can be used in lasers, laser devices, semiconductor lasers, etc., and can solve problems such as laser reliability and safety.

Pending Publication Date: 2020-09-29
LUMILEDS HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high intensity of lasers, especially blue lasers, and the high temperatures caused by photoconversion by phosphors can lead to reliability and safety issues

Method used

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  • Light converting device with confined light converter
  • Light converting device with confined light converter
  • Light converting device with confined light converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Various embodiments of the invention will now be described with the aid of the accompanying drawings.

[0039] figure 1 A schematic sketch of a prior art laser-based light source is shown in which the light converter 130 fails. The laser light 10 is directed to the light converter 130 via the laser 110 in a transmissive arrangement. The light converter 130 is adhered to the transparent substrate 115 through the coupling layer 120 (eg, silica gel) using the light incident surface. A part 131 of the light converter 130 is damaged so that the intensity of the unconverted laser light 11 locally increases compared to the converted light 20 . In extreme cases, such a failure may cause the collimated beam of laser 10 to pass through optical converter 130 . The increased intensity of unconverted laser light 11 may not be acceptable for eye safety regulations.

[0040] figure 2 A schematic sketch of a first laser-based light source comprising a laser 110 and a light conver...

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PUM

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Abstract

The invention describes a light converting device comprising: - a light converter (130) with a light entrance surface and a light emission surface, wherein the light converter (130) is arranged to convert laser light (10) scanned over the light entrance surface to converted light (20), wherein a peak emission wavelength of the converted light (20) is in a longer wavelength range than a laser peakemission wavelength of the laser light (10), - a confinement structure (150) enclosing the light converter (130), wherein the confinement structure (150) is arranged to preserve a geometric shape of the light converter (130) in case of a mechanical failure of the light converter (130). The invention further describes a laser-based light source comprising such a light converting device (130). The invention finally describes a vehicle headlight comprising such a laser- based light source.

Description

technical field [0001] The invention relates to a light conversion device with a constrained light converter, a laser-based light source comprising such a light conversion device, and a vehicle headlight comprising such a laser-based light source. Background technique [0002] In high-brightness light sources, light-converting devices are often used, which are excited by blue light emitted, for example, by lasers. The phosphor of the light conversion device is adhered to the heat sink by means of a layer of glue or solder placed between the heat sink and the phosphor. The high intensity of laser light, especially blue laser light, and the high temperature caused by photoconversion by phosphors can lead to reliability and safety issues. Contents of the invention [0003] It is an object of the present invention to provide a light conversion device with improved reliability. [0004] According to a first aspect, a light conversion device is provided. The light converting ...

Claims

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Application Information

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IPC IPC(8): H01S5/00F21V25/02H01S5/323H01S5/40F21K9/64F21S41/16F21S41/176
CPCH01S5/32341B60Q11/005F21S41/16F21S41/176F21S41/192F21V25/02F21Y2115/30H01S5/0087H01S5/4025H01S5/06825F21K9/64F21S41/32B60Q1/0023H01S5/40
Inventor U·黑希特菲舍尔F·黑林
Owner LUMILEDS HLDG BV