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Light emitting device comprising wavelength converter

A technology for wavelength converters and light-emitting devices, which can be used in lighting and heating devices, semiconductor devices of light-emitting elements, light sources, etc., and can solve the problems of light loss in the surrounding medium

Inactive Publication Date: 2015-11-18
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while an optical contact can improve the optical coupling of light emitted by an LED, an optical contact can also cause light loss from the wavelength converter to the surrounding medium through the optical contact.

Method used

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  • Light emitting device comprising wavelength converter
  • Light emitting device comprising wavelength converter
  • Light emitting device comprising wavelength converter

Examples

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Embodiment Construction

[0044] As shown in the figures, the dimensions of layers, elements and regions are exaggerated for illustrative purposes and, therefore, are provided to illustrate the general structure of embodiments of the invention. The same reference numerals refer to the same elements throughout, so that eg a lighting device according to the invention is generally denoted 1 , whereas different specific embodiments thereof are indicated by adding 01 , 02 , 03 etc. to the general reference numerals . For the several features and elements that can be added to any of the embodiments of the light emitting device according to the present invention Figures 1 to 12D , "00" has been added to all elements except those specific to one of these diagrams.

[0045] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which presently preferred embodiments of the invention are shown. However, this invention may be embodied in many different...

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PUM

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Abstract

A light source (104) arranged on a substrate (100) and having a light exit surface, a wavelength converter (106) configured to convert light from a first wavelength to a second wavelength, the wavelength converter (106) having a light exit surface (110) and a light entrance surface (114) and an optical coupling element (112), arranged between and in contact with the light exit surface of the light source (104) and the light entrance surface (114) of the wavelength converter (106), and configured to couple light from the light source (104) to the wavelength converter (106), wherein at least a major portion of the surface of the wavelength converter(106), other than the light exit surface (110) and the light entrance surface (114), has a surface roughness, RA, less than 100 nm.

Description

technical field [0001] The present invention relates to lighting devices. In particular, the present invention relates to improved light emitting devices comprising wavelength converters. Background technique [0002] The development of new and more energy-efficient lighting equipment is one of the important technical challenges facing society. Common technologies that are more energy efficient than traditional lighting solutions are often based on light-emitting diodes (LEDs). High intensity light sources are a concern for many applications including spot lighting and digital light projection. For these purposes it is possible to use wavelength converters which convert shorter wavelength light into longer wavelength light in a highly transparent luminescent material. Longer wavelength light can then be extracted from only one or a few surfaces rather than all surfaces, which increases the intensity of the emitted light, yet the light source can keep the etendue small. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50
CPCH01L33/505H01L2924/0002F21K9/64H01L33/60H01L33/644H01L25/0753H01L2924/00H01L33/502H01L33/508H01L33/58
Inventor D·K·G·德博尔D·M·布鲁尔斯W·范杜内弗尔特N·纽博格L·范德特姆佩尔C·E·蒂梅林M·A·维舒伦
Owner SIGNIFY HLDG BV