WO2016045915A1 - Light-converting device with heat pipe, and semiconductor lighting device with light-converting device - Google Patents

Light-converting device with heat pipe, and semiconductor lighting device with light-converting device Download PDF

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Publication number
WO2016045915A1
WO2016045915A1 PCT/EP2015/069912 EP2015069912W WO2016045915A1 WO 2016045915 A1 WO2016045915 A1 WO 2016045915A1 EP 2015069912 W EP2015069912 W EP 2015069912W WO 2016045915 A1 WO2016045915 A1 WO 2016045915A1
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WO
WIPO (PCT)
Prior art keywords
light
according
phosphor body
conversion device
wick
Prior art date
Application number
PCT/EP2015/069912
Other languages
German (de)
French (fr)
Inventor
Farhang Ghasemi Afshar
Original Assignee
Osram Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE102014219207.2 priority Critical
Priority to DE102014219207.2A priority patent/DE102014219207A1/en
Application filed by Osram Gmbh filed Critical Osram Gmbh
Publication of WO2016045915A1 publication Critical patent/WO2016045915A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/51Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/04Optical design
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

The invention relates to a light-converting device (2) having a loop heat pipe (4, 5-10, 14, 15), the evaporator of which has at least one luminescent element (6). A semiconductor lighting device (1) has at least one light-converting device (2) and at least one semiconductor light source (3), and primary light (P) which can be emitted from the at least one semiconductor light source (3) can be emitted onto the at least one luminescent element (6) such that the at least one luminescent element (6) can at least partly convert the primary light (P) emitted onto the luminescent element into secondary light (S). The invention can be used in particular on vehicle lighting devices, in particular headlights, and projectors, for example screen projectors and movie projectors.

Description

description

Heat pipe light conversion device and semiconductor light emitting device with light conversion device

The invention relates to a light conversion device having a heat pipe. The invention further relates to a semiconductor lighting device, comprising at least one light conversion device and at least one

Semiconductor light source, wherein of the at least one

 Semiconductor light source can be radiated to the at least one phosphor body so that the at least one phosphor body can at least partially convert the incident on him primary light into secondary light. The invention is particularly applicable to

 Lighting devices for exterior and interior lighting. The invention is particularly applicable to vehicle lighting devices, in particular headlamps, and to projectors, e.g. Screen projectors and cinema projectors.

Wavelength conversion phosphor can at least partially emit incident primary light into secondary light

convert or convert different wavelengths. If several phosphors are present, they may produce secondary light of mutually different wavelengths. The wavelength of the secondary light may be longer (so-called "down conversion") or shorter (so-called "up conversion") than the wavelength of the primary light. For example, blue likes

Primary light can be converted by means of a phosphor in green, yellow, orange or red secondary light. In a partial wavelength conversion or

Wavelength conversion is a mixture of secondary light and unconverted from the phosphor body

Primary light emitted, which can serve as useful light. The wavelength conversion generates heat, which is a

Reduced conversion efficiency. In addition, the heat causes a wavelength shift (the so-called "Stokes shift") of the Secondary light causes. Therefore, it is the endeavor that

Keep the phosphor cool.

US 2011/0280033 A1 discloses a headlight comprising: a laser diode for emitting a laser beam; a light emitting portion for emitting light when it is incident on the laser beam emitted from the laser diode

is irradiated; and a cooling device for cooling the light-emitting device using a

Liquid. With this arrangement, it is possible to have a

 To prevent increase in the temperature of the light-emitting portion, which is irradiated with excitation light, and thereby a light source with a long life

provide.

It is the object of the present invention to at least partially overcome the disadvantages of the prior art and, in particular, to provide a particularly user-friendly possibility of cooling semiconductor heat-emitting devices based on a heat pipe.

This object is achieved according to the characteristics of the independent

Claims solved. Preferred embodiments are

in particular the dependent claims.

The task is solved by a

Light conversion device comprising a loop

Heat pipe whose evaporator has at least one

Has phosphor body.

This light conversion device or conversion device has the advantage that by integrating the

Fluorescent body is provided in the loop heat pipe a particularly compact and simple way to enable a reliable operation with low weight over long distances. The loop heat pipe can also heat a large amount of heat with a small

Transport temperature difference. This allows a ^

effective cooling of the at least one phosphor body at a nearly constant temperature (namely a

Evaporation temperature of the loop in the heat pipe

guided working medium or coolant). In turn, effective generation of a very high luminous flux from the phosphor body becomes virtually constant

Color temperature and color location and a long life

allows. Also particularly advantageous is the ability to work against gravity. The loop heat pipe requires no mechanical moving parts and is virtually noiseless operable.

The loop heat pipe (also known as "loop heat pipe", LHP) is a two-phase heat transfer system in the form of a continuous loop or loop in which a working medium or "refrigerant" in a vapor

Condition as well as in a liquid state always flows in the same direction. Heat is removed from the working medium by evaporation of the liquid working medium at the

Evaporator or evaporator (ie here on the at least one phosphor body) absorbed. This heat will be the

deprived of at least one phosphor body, which is thus cooled. The vaporized working medium is transported in the loop to a condenser or condenser to condense out there again. That by condensation

liquefied working fluid then flows back to the

Evaporator. This circuit makes use of the latent heat of vaporization or condensation heat of the working medium, which allows the transmission of relatively large amounts of heat with small amounts of the working medium and negligible temperature gradients.

The phosphor body can emit light incident upon it (hereinafter, without limitation of generality)

"Primary light") of a first predetermined

Spectral range at least partially in light of a

given second spectral range (hereinafter without limiting the general public as "secondary light" ), in particular primary light of a first wavelength or color (eg blue or UV light) in

Secondary light of a second wavelength or color (e.g., in green, red, orange, and / or yellow light). In a partial wavelength conversion or

 Wavelength conversion of the phosphor body is a mixture of secondary light and unconverted

Primary light emitted, which can serve as useful light.

For example, white useful light may be a mixture of blue, unconverted primary light and yellow

Secondary light can be generated. However, one too

Full conversion possible, in which the useful light either no longer or only a negligible proportion in the useful light is present. A degree of conversion depends

for example, from a thickness of the phosphor body and / or a concentration of conversion-active particles or dopants.

It is an embodiment that the at least one

Phosphor body is a porous ceramic phosphor body. This is particularly suitable for the evaporation of adjacent and / or penetrating liquid working medium. The large inner surface causes a strong and even evaporation and thus cooling of the phosphor body. Due to its ceramic nature, it is also mechanically stable and resistant to high temperatures and to most working media. The ceramic phosphor body may be e.g. be endowed with rare earths.

The ceramic phosphor body may comprise one or more ceramic phosphors, for example by being applied to different ceramic phosphor powders

has been composed, e.g. has been sintered, or has been doped with different dopants. If several phosphors are present, secondary light components of different spectral colors can be produced from the primary light

Composition, eg green, yellow, n

 5

orange and / or red secondary light. The

For example, orange secondary light may be used to give the useful light a warmer hue, e.g. In the presence of a plurality of phosphors, at least one phosphor may be suitable for further wavelength conversion of secondary light, for example green secondary light into red secondary light Such light, once again wavelength converted from a secondary light, may also be referred to as

"Tertiary light".

Alternatively, the at least one phosphor body may be a porous body having a base or matrix material (e.g., silicone or epoxy) in which the phosphor is embedded as a filler. In particular, the base or matrix material may be porous. The phosphor likes

for example, as a powder. Such a

Phosphor body has the advantage that particularly simple and several different phosphors or

Powders may be present.

It is still an embodiment that the at least one phosphor body is arranged on a porous wick or on a capillary wick structure, in particular introduced into the wick Capillary effect to the at least one phosphor body

Phosphor body facing away or spaced end portion in contact with the liquid working medium. The at least one warm phosphor body produced by evaporation of the

Working medium a suction effect or a negative pressure in the wick, whereby the liquid working medium is tightened. This suction effect or vacuum provides enough force to allow the working fluid to pass through the loop

can circulate, even against gravity.

Alternatively, or in addition to the porous wick, a pump of the light conversion device may be used to drive the Circulation of the working fluid in the loop in all

To maintain space or inclinations.

The at least one phosphor body may be introduced into a porous wick, which results in a particularly large transition between the wick and the at least one

Fluorescent body allows.

The wick may be a ceramic wick, as it is particularly small-pore ausgestaltbar and so can cause a particularly strong capillary effect. Due to its ceramic nature, it is also mechanically stable and resistant to high temperatures and to most

Working media.

The phosphor body may be made separately and then connected to the wick, e.g. embedded or embedded in it. In the case of a ceramic wick and at least one ceramic phosphor body, the ceramic base material may be the same. Then, the wick and the at least one phosphor body may in particular be in one piece or made of a piece of porous ceramic

have been produced. This provides the advantage that a marriage of individually manufactured parts can be omitted. Such a one-piece porous ceramic body can

For example, be doped locally (e.g., with rare

Ground) to provide at least one phosphor body or phosphor area serving as the phosphor body. It is another embodiment that the wick

translucent (transparent or translucent). As a result, the at least one phosphor body can be irradiated through the wick with the primary light. On

Passage openings in the wick for passing the

Primary radiation can therefore be dispensed with. Alternatively, the wick may have one or more ports or

Have channels to the at least one phosphor body. It is yet another embodiment that the wick on at least part of its surface outside the

Reflecting at least one phosphor body

is designed. For example, the wick may have a diffuse or specular reflective coating there. As a result, a Nutzlichtausbeute can be further increased. In particular, from the at least one

Phosphor bodies are redirected in an otherwise unused direction for Nutzlichtauskopplung, e.g. back to the phosphor body. Also, such a conversion efficiency can be increased.

At least one locally non-reflecting region may be present in the reflective surface, through which the primary light can be radiated onto the at least one phosphor body. The reflective surface may alternatively or additionally for the secondary light

reflective and permeable to the primary light, e.g. to be a dichroic layer.

It is also an embodiment that the wick on its at least one phosphor body bearing area

is plate-shaped. As a result, one or more planar phosphor bodies can be arranged flush with the surface of the wick. The at least one phosphor body can in particular on at least one flat side of the

be arranged plate-shaped area.

It is also an embodiment that the at least one phosphor body of at least partially

surrounded by a translucent chamber having a leading to a condenser of the loop heat pipe leading outlet for working medium. This embodiment is particularly compact feasible. That of the at least one

Fluorescent body vaporized working medium is thus discharged into the chamber, from which it can escape only through the outlet again. The flow of the vaporized

Working fluid through the outlet to the condenser (where it is again liquefied) takes place on the one hand due to the force exerted by the wick on the liquid working fluid suction and on the other hand by the force exerted in the chamber by the vaporized working fluid pressure.

It is also an embodiment that the wick leads into the chamber. This allows the advantage that the at least one phosphor body can be arranged in a particularly varied manner. It is also an embodiment that the chamber

has at least one translucent window. Thus, the primary light can also be radiated through non-translucent areas of a chamber wall in the chamber. It is also an embodiment that the chamber a

Having bottom-side connecting part through which the wick is passed, which has the outlet and that is covered by a translucent cover. Such a chamber is particularly simple. In particular, such an upward or forward directed light emission from the at least one phosphor body unhindered by the

Connections are performed. The cover may e.g. made of glass or plastic. It may be transparent or translucent or opaque. The cover may be, for example, spherical shell-shaped. The cover may rest with its free edge on the bottom-side connecting part and with this, e.g. be glued. The at least one

Phosphor body is located in particular in the chamber. It is also an embodiment that the bottom-side connecting part consists of an opaque material, in which at least one window is embedded or present, and a visual connection of the at least one window to the at least one phosphor body. As a result, the material for the bottom part can be selected particularly varied, for example with regard to a mechanical strength. The object is also achieved by a semiconductor lighting device, comprising at least one

Light conversion device as described above and

at least one semiconductor light source, wherein of the

emitted at least one semiconductor light source

Primary light can be radiated to the at least one phosphor body, so that the at least one phosphor body can at least partially convert the incident on him primary light into secondary light. The semiconductor lighting device can analogously to the

 Light conversion device can be formed and has the same advantages.

In particular, the at least one

Semiconductor light source at least one diode laser. This may, for example, blue or ultraviolet light

radiate. Alternatively, the at least one

Semiconductor light source e.g. have at least one light emitting diode. That of the light conversion device

radiated useful light as a mixture of primary light and

Secondary light may be e.g. to be a white light.

The at least one semiconductor light source is in particular arranged at a distance from the at least one phosphor body, which is also known as the so-called "remote phosphor" concept. If the at least one semiconductor light source is a laser, this concept is also referred to as LARP ("laser

Activated Remote Phosphor ")

 Semiconductor light source and the phosphor body are therefore in particular separately prepared and spaced apart components of the semiconductor light-emitting device.

It is an embodiment that the at least one

Semiconductor light source is disposed outside the chamber and the primary light from the outside (for example, by the at least one

Window of the bottom-side connecting part) on the at least one arranged in the chamber phosphor body is radiant. As a result, the light conversion device is special easy to manufacture and also multi-positionable with respect to the at least one semiconductor light source.

In addition, the light conversion device is not burdened by the waste heat generated by the at least one semiconductor light source. The at least one

 Rather, the semiconductor light source can be cooled separately, for example by thermal coupling to a heat sink and / or by active cooling, e.g. by means of a fan. It is a development that a plate-shaped portion of the wick at its the bottom-side connection part

formed facing "lower" flat side is reflective and on its cover facing the "upper"

Flat side having at least one phosphor body. Thus, a luminous efficacy is increased without a solid angle range practically illuminable by the at least one phosphor body being appreciably restricted. Alternatively or additionally, a surface of the base-side connecting part facing the chamber may be diffuse or specular

be formed reflective.

It is a further development that the lower flat side of the plate-shaped region of the wick has at least one passage region for the passage of primary light into the wick. As a result, a backward irradiation of the phosphor body can be achieved in a simple manner.

It is also an embodiment that the semiconductor light-emitting device is a lamp. The semiconductor lighting device may also be a lighting module. The

 Semiconductor lighting device may further be a lamp.

It is also an embodiment that the semiconductor lighting device is a vehicle lighting device, in particular for illuminating an environment of the vehicle, for example a headlight or a part of a headlight. The vehicle may be, for example, a passenger car, a truck or a motorcycle. The semiconductor lighting device may also be a projection device or a part of a projection device. The projection device may be, for example, an image projector for the home or office area. It may also be a cinema projector.

The above-described characteristics, features and advantages of this invention as well as the manner in which they are achieved will become clearer and more clearly understood

In connection with the following schematic description of an embodiment that is related to the

Drawings will be explained in more detail. It can to

Clarity identical or equivalent elements must be provided with the same reference numerals.

The single figure shows as a sectional view in

Side view of a semiconductor light-emitting device 1 with a light conversion device 2 and a semiconductor light source in the form of a blue primary light emitting laser diode 3. The light conversion device 2 comprises a loop heat pipe 4 with condenser or condenser 5, designed as a phosphor body 6 evaporator, a first loop portion 7 and a second

Loop section 8. In the loop heat pipe 4 is

Working medium M out. More specifically, in the second loop section 8, there are vaporous working medium M, Md flowing to the condenser 5. In the condenser 5, the vaporous working medium M, Md is liquefied and discharged into the first loop section 7. The liquid working medium M, Mf located in the first loop section 7 flows to the phosphor body 6 serving as the evaporator, which vaporizes the liquid working medium M, Mf. The

vaporous working medium M, Md is in the second

Loop section 8 delivered.

At least in its section adjoining the phosphor body 6, the first loop section 7 has a porous ceramic wick 9 or is in the form of such a wick 9 educated. The wick 9 is translucent here. The liquid working medium M, Mf evaporating on the phosphor body 6 is drawn through the wick 9 by means of a capillary action. The condenser 5 and / or the first

Loop section 7 may have a reservoir (not shown) for the liquid working medium M, Mf, in which e.g. a remote from the phosphor body 6 end portion of the wick 9 can dive. The phosphor body 6 is here formed as a ceramic phosphor, e.g. by introducing a separately produced phosphor body 6 into the wick 9 or by doping a region then serving as the phosphor body 6

9. The wick 9 is at his den

Fluorescent body 6 having end portion 10 formed plate-like.

An end portion of the wick 9 having the phosphor body 6 is surrounded by a light-permeable chamber 11. The chamber 11 is constructed in two parts with a

 Connecting part 12 and a bottom-side connecting part 12 and the phosphor body 6 overarching translucent cover 13. The cover 13 is made of transparent or translucent glass and has a halbkugelschalige basic shape. The cover 13 is placed with its free edge close to the connection part 12.

The connector 12 has one to the first

 Loop passage 7 associated passage 14 for the wick 9 and one belonging to the second loop portion 8, leading to the condenser 5 outlet 15th

The laser diode 3 is arranged outside the chamber 11 and on a central window 16 in the bottom side

Aligned connector 12, which is transparent to the emitted from the laser diode 3 beam of the primary light P, but is impermeable or dense for the vaporous working medium Md. The entering into the interior of the chamber 11 Primary light P then hits a flat side 17 of the

plate-shaped end portion 10 of the wick 9, which is occupied up to a central passage area 18 with a diffuse or specular light-reflecting layer 19. The primary light P radiates through the passage area 18 into the translucent wick 9 and runs in the wick 9 to that on another flat side 20 of the plate-shaped

Consequently, there is a line of sight from the window 16 to the phosphor body 6.

The irradiated on the phosphor body 6 blue

Primary light P is partly converted into yellow secondary light S, so that a total of a blue-yellow or white mixed light P, S is emitted as useful light from the phosphor body 6. Mixed light P, S emitted in a rearward direction is reflected at the light-reflecting layer 19 and deflected forwards, so that this light can also be used as useful light.

Overall, therefore, when activated laser diode 3 of the phosphor body 6 partially wavelength-converted mixed light P, S emitted as useful light, which corresponds to a LARP structure. In this case, the phosphor body 6 heats up, so that he attached from the wick 9 liquid

 Working medium M, Md evaporated into the interior of the chamber 11. The evaporation of the working medium M dissipates heat from the phosphor body 6, so that it is cooled,

in particular to a very constant temperature in the region of an evaporation temperature of the working medium M. The vaporous working medium M, Md is guided by the increasing pressure by means of evaporation through the outlet 15 of the second loop section 8 to the condenser 5, where it is liquefied again. The liquid working medium M, Md is pulled back to the solid body 6 by the capillary action of the wick 9. The semiconductor light-emitting device 1 may be, for example, a lamp, a module or a luminaire or represent a part thereof. In particular, the useful light P, S emitted by the phosphor body 6 may be coupled out by a coupling-out optical system 21 (here indicated as a lens), eg for image projection or for illuminating a road or a vehicle environment.

Although the invention in detail by the shown

The exemplary embodiment has been illustrated and described in more detail, the invention is not limited thereto and other variations can be derived by the person skilled in the art without departing from the scope of the invention. Thus, in general, besides a laser diode, another semiconductor laser or other semiconductor light source may also be used. Also, the use of a laser, which is not a semiconductor laser, possible. Thus, the invention may also include lighting devices with light sources of general, not limited to a semiconductor type.

Generally, "on", "an", etc. may be taken to mean a singular or a plurality, in particular in the sense of "at least one" or "one or more" etc., unless this is explicitly excluded, e.g. by the expression "exactly one", etc.

Also, a number may include exactly the specified number as well as a usual tolerance range, as long as this is not explicitly excluded. , n

 10

Semiconductor lighting device

Light conversion device

laser diode

 Loop heat pipe

 capacitor

 Luminescent body

 First loop section

Second loop section

wick

 Plate-like end chamber

 Bottom-side connection part

cover

 execution

 Aus1ass

 window

 flat side

 Passband

 Light-reflecting layer

flat side

 outcoupling optics

 working medium

 Vaporous working medium Liquid working medium Primary light

SekundärIicht

Claims

claims
A light conversion device (2) comprising
 Loop heat pipe (4, 5-10, 14, 15), the evaporator having at least one phosphor body (6).
2. The light conversion device (2) according to claim 1, wherein the at least one phosphor body (6) is a porous ceramic phosphor body.
3. light conversion device (2) according to one of
 preceding claims, wherein the at least one phosphor body (6) is incorporated in a porous ceramic wick (9).
4. Light conversion device (2) according to claim 3, wherein the wick (9) is translucent.
5. A light conversion device (2) according to claim 4, wherein the wick (9) on at least a part (17) of its
 Surface outside of the at least one
 Fluorescent body (6) designed reflective (19).
6. Light conversion device (2) according to one of
 preceding claims, wherein the at least one phosphor body (6) of a translucent
 Chamber (11) is surrounded, which has a to a condenser (5) of the loop heat pipe (4) leading outlet (15) for working medium (M, Md).
7. light conversion device (2) according to claim 6 in
 Combination according to any one of claims 3 to 5, wherein the wick (9) leads into the chamber (11).
8. Light conversion device (2) according to any one of claims 6 or 7, wherein the chamber (11) at least one
 having translucent window (16).
A light conversion device (2) according to any one of claims 6 to 8 in combination with any one of claims 3 to 5, wherein the chamber (11) has a bottom end fitting (12) through which the wick (9) passes, passing the outlet (15 ) and which is arched by a translucent cover (13).
A light conversion device (2) according to claim 9, wherein
- The bottom-side connecting part (12) from a
 opaque material, in which at least one window (16) is present, and
- A visual connection of the at least one window (16) to the at least one phosphor body (6).
11. semiconductor lighting device (1) comprising
 - At least one light conversion device (2) according to one of the preceding claims and
 - At least one semiconductor light source (3), wherein
- The primary light (P) which can be emitted by the at least one semiconductor light source (3) can be radiated onto the at least one phosphor body (6) so that the at least one phosphor body (6) at least partially converts the primary light (P) irradiated onto it into secondary light (S) can.
A semiconductor lighting device (1) according to claim 11, comprising at least one light conversion device (2) according to claim 11, wherein
 the at least one semiconductor light source (3)
 is arranged outside the chamber (11) and
- The primary light (P) through the at least one window (16) of the bottom-side connecting part (12) on the at least one phosphor body (6) is radiant.
13. The semiconductor lighting device (1) according to claim 12, comprising at least one light conversion device (2) according to claim 5, wherein
 - the wick (9) on his at least one
 Fluorescent body (6) carrying region (10) is plate-shaped,
 - This area (10) at its the bottom side
 Formed connecting part (12) facing lower flat side (17) is reflective,
 - The lower flat side (17) at least one
 Passage region for the passage of primary light in the wick (9) and
 - This area (10) at its the cover (13)
 having facing upper flat side (20) the at least one phosphor body (6).
14. Semiconductor lighting device (1) according to one of
 Claims 11 to 13, wherein the semiconductor light-emitting device (1) is a lamp, a light module or a lamp.
PCT/EP2015/069912 2014-09-23 2015-09-01 Light-converting device with heat pipe, and semiconductor lighting device with light-converting device WO2016045915A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102014219207.2 2014-09-23
DE102014219207.2A DE102014219207A1 (en) 2014-09-23 2014-09-23 Heat pipe light conversion device and semiconductor light emitting device with light conversion device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201580049058.8A CN106796017A (en) 2014-09-23 2015-09-01 Optical switching equipment with heat pipe and the semiconductor light-emitting equipment with optical switching equipment

Publications (1)

Publication Number Publication Date
WO2016045915A1 true WO2016045915A1 (en) 2016-03-31

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DE (1) DE102014219207A1 (en)
WO (1) WO2016045915A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018101988A1 (en) * 2018-01-30 2019-08-01 HELLA GmbH & Co. KGaA Headlamp for a vehicle with a cooling device for a semiconductor lamp

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US20090213613A1 (en) * 2006-02-01 2009-08-27 Osram Gesellschaft Mit Beschrankter Haftung Vehicle Headlight
US20090034231A1 (en) * 2007-08-01 2009-02-05 Foxsemicon Integrated Technology, Inc. Anti-icing outdoor lamp
WO2010097721A1 (en) * 2009-02-27 2010-09-02 Koninklijke Philips Electronics, N.V. Led-based lamps and thermal management systems therefor
US20110280033A1 (en) 2010-05-17 2011-11-17 Sharp Kabushiki Kaisha Light-emitting device, illumination device, and vehicle headlamp
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DE102014219207A1 (en) 2016-03-24

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