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A light emitting device

A light-emitting device, light guide technology, applied in mechanical equipment, lighting and heating equipment, optics, etc., can solve problems such as reducing system efficiency, and achieve the effect of reducing absorption/scattering loss

Inactive Publication Date: 2016-05-04
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned light-emitting devices, various effects such as reabsorption, scattering, and thermal quenching caused by excessive heating of the phosphor can seriously reduce the system efficiency

Method used

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Embodiment Construction

[0046] The 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 forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and will fully convey the invention to those skilled in the art. the scope of the invention.

[0047] The following description will begin with general considerations regarding applications, suitable light sources and suitable materials for the various elements and features of the light emitting device according to the invention. For this purpose, reference will be made to Figure 1 to Figure 6 Several features and elements are described which may be added to any of the embodiments of the light emitting device according to the invention as set forth further below. will refer to Figure 7...

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PUM

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Abstract

A light emitting device (1) comprising plurality of solid state light sources(21, 22, 23), and a transparent substrate (3) comprising a first light input surface (31) and a first light exit surface (32) extending in an angle different from zero to one another, the transparent substrate (3) being adapted for receiving light (13) emitted by the plurality of light sources (21, 22, 23) at the first light input surface (31), guiding the light (13) to the first light exit surface (32) and coupling the light (13) out of the first light exit surface (32), wherein active layers of the plurality of solid state light sources(21, 22, 23) are provided in direct physical contact with the first light input surface (31) of the transparent substrate (32) and wherein the first light input surface has a larger surface area than the first light exit surface.

Description

technical field [0001] The present invention relates to light emitting devices comprising a plurality of solid state light sources, such as light emitting diodes (LEDs), and a transparent substrate. Background technique [0002] US 7,737,460 B2 describes a white LED chip comprising an LED chip formed on a main surface of a sapphire substrate. A light extraction film is provided on the other main surface of the sapphire substrate. The two main surfaces extend opposite each other and parallel. In addition, phosphor members for generating white light may be provided on the opposite side of the substrate with respect to the light extraction film. [0003] High brightness light sources are of interest for a variety of applications including spot lighting, stage lighting, automotive lighting, and digital (front) projection. For this purpose, it is possible to use so-called light concentrators, in which shorter wavelength light is converted to longer wavelengths in a highly tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V8/00H01L33/60F21V9/40
CPCH01L27/153H01L33/20H01L25/0753H01L2924/0002G02B6/0003H01L33/60G02B6/0068H01L2924/00G02B6/0028G02B6/0073H01L33/005H01L33/58
Inventor R·A·M·希克梅特T·范博梅尔
Owner SIGNIFY HLDG BV