Light-emitting semiconductor component

Patent metadata

Field	Value
Publication number	US-9373759-B2
Application number	US-201314430192-A
Country	US
Kind code	B2
Filing date	Sep 24, 2013
Priority date	Sep 26, 2012
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

The invention relates to a light-emitting semiconductor component, having: a light-emitting semiconductor chip ( 1 ) with an active region ( 11 ) which, in operation, emits light ( 31 ) having a first spectrum; a wavelength conversion element ( 2 ) which is positioned remote from the semiconductor chip ( 1 ), is downstream of the semiconductor chip ( 1 ) in the beam path of the light ( 31 ) having the first spectrum and converts the light ( 31 ) having the first spectrum at least partially into light ( 32 ) having a second spectrum; and a filter layer ( 3 ), which reflects at least a part ( 34 ) of a light ( 33 ) incident on the semiconductor component from the outside. The part ( 34 ) of the light ( 33 ) incident on the semiconductor component from the outside that is reflected by the filter layer ( 3 ) has a visible wavelength range and overlaps a color impression produced by the wavelength conversion element when the semiconductor component is in a switched-off state.

First claim

The invention claimed is:

1. A light-emitting semiconductor component, comprising:
a light-emitting semiconductor chip having an active region, which emits light having a first spectrum during operation;
a wavelength conversion element, which is positioned in a manner remote from the semiconductor chip and is disposed downstream of the semiconductor chip in the beam path of the light having the first spectrum and which at least partly converts light having the first spectrum into light having a second spectrum; and
a filter layer, which reflects at least one part of light incident on the semiconductor component from outside,
wherein
that part of the light incident on the semiconductor component from outside which is reflected by the filter layer has a visible wavelength range and is superimposed on a color impression brought about by the wavelength conversion element in a switched-off state of the semiconductor component, and
the wavelength conversion element is arranged spatially at a distance from the filter layer.

2. The semiconductor component according to claim 1 , comprising a carrier embodied as a housing, wherein
the housing has a depression,
the semiconductor chip and the wavelength conversion element are arranged within the depression, and
the filter layer is arranged above the depression as a cover of the carrier.

3. The semiconductor component according to claim 1 , wherein the wavelength conversion element is at a distance from the semiconductor chip which corresponds to a multiple of a lateral extent of the semiconductor chip.

4. The semiconductor component according to claim 1 , wherein the semiconductor component comprises a carrier, on which the semiconductor chip is arranged and which carries the wavelength conversion element arranged in a manner remote from the semiconductor chip.

5. The semiconductor component according to claim 4 , wherein
the wavelength conversion element is embodied as a cover, window or shell above the semiconductor chip, or
the wavelength conversion element and the filter layer are embodied as a cover, window or shell above the semiconductor chip.

6. The semiconductor component according to claim 1 , wherein the filter layer is disposed downstream of the wavelength conversion element in the beam path of the light having the first spectrum.

7. The semiconductor component according to claim 6 , wherein
the semiconductor component comprises a light emission surface disposed downstream of the filter layer, and
the light incident on the semiconductor component from outside is radiated onto the light emission surface.

8. The semiconductor component according to claim 1 , wherein the first spectrum comprises a visible wavelength range.

9. The semiconductor component according to claim 1 , wherein that part of the light incident on the semiconductor component from outside which is reflected by the filter layer corresponds at least partly to that partial spectrum of the light having the first spectrum which is converted by the wavelength conversion element.

10. The semiconductor component according to claim 1 , wherein the filter layer is transparent to a part of the light having the first spectrum.

11. The semiconductor component according to claim 1 , wherein
the first spectrum comprises a blue wavelength range and the second spectrum comprises a yellow wavelength range,
the semiconductor component comprises a light emission surface disposed downstream of the filter layer, and
the light emission surface produces a non-yellowish color impression for an observer in a switched-off state.

12. The semiconductor component according to claim 1 , wherein the wavelength conversion element is embodied as a ceramic wavelength conversion element.

13. The semiconductor component according to claim 1 , wherein the wavelength conversion element comprises a wavelength conversion substance in a matrix material and the matrix material comprises a transparent plastic.

14. The semiconductor component according to claim 13 , wherein the wavelength conversion element is embodied as a self-supporting film.

15. The semiconductor component according to claim 1 , wherein the wavelength conversion element comprises a carrier element, on which a wavelength conversion substance is applied, and the carrier element comprises glass or plastic.

16. The semiconductor component according to claim 1 , wherein
the filter layer is embodied as a dichroic mirror comprising a periodic sequence of first layers and second layers,
the first layers have a first refractive index and the second layers have a second refractive index, which is different than the first refractive index, and
the first layers and the second layers of the filter layer in each case comprise an oxide or nitride.

17. The semiconductor component according to claim 1 , wherein the filter layer is applied on the wavelength conversion element.

18. The semiconductor component according to claim 1 , wherein
the filter layer comprises at least one main surface facing away from the wavelength conversion element,
the light incident on the semiconductor component from outside is radiated onto the main surface at an angle, and
the part of the light incident on the semiconductor component from outside is reflected by the filter layer in a manner dependent on said angle.

19. The semiconductor component according to claim 1 , wherein the wavelength conversion element and the filter layer are embodied as a shell above the semiconductor chip.

20. A light-emitting semiconductor component, comprising:
a light-emitting semiconductor chip having an active region, which emits light having a first spectrum during operation;
a carrier embodied as a housing;
a wavelength conversion element, which is positioned remote from the semiconductor chip and is configured to convert light having the first spectrum into light having a second spectrum; and
a filter layer which is configured to reflect one part of light incident on the semiconductor component from outside, wherein the filter layer is configured in such a way that the reflected part has a spectrum containing one or a plurality of spectral components contained in an absorption spectrum of a wavelength conversion substance of the wavelength conversion element,
wherein
the housing has a depression,
the filter layer is arranged above the depression as a cover of the carrier,
the semiconductor chip and the wavelength conversion element are arranged within the depression, and
the wavelength conversion element is embodied as a self-supporting film and is arranged spatially at a distance from the filter layer.

Assignees

• Osram Opto Semiconductors Gmbh

Inventors

• Wilm Alexander

Classifications

• H10W72/884

  Die-attach connectors and bond wires · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title

• H10H20/8516

  having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer or wavelength conversion layer with a concentration gradient · CPC title

• H10H20/8515

  not being in contact with the bodies · CPC title

• H10H20/8511

  characterised by their material, e.g. binder · CPC title