EP2875287A1 - Lichtabgabeanordnung und leuchte mit einer lichtabgabeanordnung - Google Patents
Lichtabgabeanordnung und leuchte mit einer lichtabgabeanordnungInfo
- Publication number
- EP2875287A1 EP2875287A1 EP13736916.1A EP13736916A EP2875287A1 EP 2875287 A1 EP2875287 A1 EP 2875287A1 EP 13736916 A EP13736916 A EP 13736916A EP 2875287 A1 EP2875287 A1 EP 2875287A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- optical element
- output device
- insulating
- emitting device
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/15—Thermal insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/86—Ceramics or glass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING 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
- F21Y2101/00—Point-like light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING 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
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention relates to a light-emitting device with a Lichtabstrahlelement and an optical element for influencing the light. Furthermore, the concerns
- Invention a lamp with such a light output device.
- Softening temperature or melting temperature of the material, from which the optical element is made it comes to deformation or melting of the optical element.
- the optical element also discolors due to the heating, a "chain reaction" can also occur because as a result of such discoloration, more radiation or light is usually absorbed again, and the increase in temperature involved can therefore damage the optical element In addition, it may also result in damage to other components of the light output device and even to complete destruction of the light output device.
- the problem outlined arises, in particular, if the optical element consists of a material which has a correspondingly low thermal resistance, that is to say in particular a comparatively low one
- the optical element consists of plastic.
- the optical element may be, for example, a plastic lens or a scattering sheet of plastic act. It can already be a very small
- Fig. 3 a part of a correspondingly destroyed light output device is shown.
- Plastic lens The plastic lens is surrounded by a reflector 30, which has also been damaged.
- the components are damaged or destroyed by melting or decomposition. As mentioned above, it can therefore not only to the destruction of the optical element, here the plastic lens, come to, but even to damage other components of the light emitting device.
- FIG. 4 shows a part of a corresponding light emission arrangement in which the light entry surface 21 of FIG. 4
- Plastic lens here designated 20 '
- a point 22 has been applied with a felt-tip pen, which simulates or represents a corresponding dirt particle.
- Arrangement was provided with a Lichtabstrahlelement - here in the form of an LED light source (LED: light-emitting diode) - and operated for two hours at light emitting Lichtabstrahlelement.
- Fig. 5 shows the state after two hours: Practically, the entire light entry surface 21 is irregularly deformed by the destruction and black.
- the invention has for its object to provide a corresponding light-emitting device or a lamp with a light-emitting device in which the risk of heat-related damage is reduced.
- a light emitting device comprising a
- the light-emitting device has a light-transmitting insulating member disposed in the path of the light, wherein the insulating member made of a thermally more stable material than the optical element.
- Insulating element on which, the optical element opposite side, accumulates, the corresponding, resulting from absorption heat within the
- Insulating element distributed by heat conduction;
- a thermal resistance between the particle and the optical element is formed by the insulating element itself. In this way, the likelihood of thermally induced damage to the optical element is significantly reduced.
- the insulating member is arranged such that the of the
- Lichtabstrahlelement radiated light first passes through the insulating and then enters the optical element.
- the optical element is made of plastic.
- the insulating element is preferably made of glass.
- Insulating element is designed plate-shaped or disc-shaped. In addition, it can be achieved thereby that the light is particularly little affected when passing through the insulating.
- a particularly large thermal resistance to the optical element can be achieved if the light output device is designed such that an air-filled space is formed between the optical element and the insulating element. By such an air space or air gap, the heating of the optical element can be further reduced.
- the insulating element in this case causes a distribution of heat through heat conduction and the air-filled space contributes to the formation of a particularly large thermal resistance.
- the insulating member is formed of one piece. In this way, a particularly simple design can be achieved. In addition, it can be achieved by this that the light is weakened or deflected by the insulating element is particularly little, so that the efficiency of the light-emitting device is particularly impaired.
- the insulating element is configured and arranged such that it limits a light entry surface for the entry of the light into the optical element. In this way, it is practically possible to prevent a particle from accumulating on the light entry surface of the optical element.
- the light-emitting device further comprises a surrounding element that surrounds both the optical element and the
- Insulating element comprising, in particular dustproof is arranged comprehensive.
- Insulating element and the Um chargedselement be formed limited. Also in this way can practically be ruled out that a particle on the
- Light entry surface of the optical element attaches.
- the enclosure element is designed and arranged such that it limits a light entry surface for the entry of the light into the optical element.
- a particularly simple design of the light output device is made possible.
- a particularly simple design option also arises when the
- Light emitting element is arranged directly or indirectly supported on the Um balancedselement.
- a luminaire is provided.
- FIG. 1 is a perspective sketch in the manner of an exploded view of components of a light output device according to the invention
- Fig. 2 is a corresponding cross-sectional sketch
- Fig. 1 components of a light output device according to the invention are outlined in the manner of an exploded view, Fig. 2 shows a corresponding
- the light-emitting device comprises a light-emitting element 1 for emitting a light.
- the light emitting element 1 is indicated only schematically.
- the light emitting element 1 can be an LED light source, that is, for example, a circuit board on which an LED is arranged or a plurality of LEDs are arranged.
- the light-emitting device comprises an optical element 2 for
- the optical element 2 consists of a plastic.
- the optical element 2 may be, for example, a lens.
- the optical element 2 has a Lichteintrittsfikiee 25, which is designed to enter the light emitted by the Lichtabstrahlelement 1 light.
- the Lichteinbergsfikiee 25 may be formed by one, the light emitting element 1 facing surface region of the optical element 2.
- the light-emitting device comprises a light-transmitting insulating element 3.
- the insulating element 3 is arranged in the path of the light and consists of a material which is thermally more stable than the material of which the optical element 2 consists.
- the design is such that the insulating element 3 is arranged such that the light emitted by the light emitting element 1 first passes through the insulating element 3 and then enters the optical element 2.
- the insulating element 3 is made of glass. Glass is thermally more stable than plastic.
- the insulating element 3 is preferably designed plate-shaped or disk-shaped. In addition, it preferably consists of only one piece. In this way, the passage of light is particularly little affected.
- a thermally comparatively stable "intermediate layer" can be formed by the insulating element 3 between the thermally more sensitive optical element 2 on the one hand and a possibly present particle 9. Owing to the translucence of the insulating element 3, the optical properties of the light-emitting device, in particular their
- the intermediate layer or the insulating member 3 so to speak, distributes the heat, which forms in the case of the deposited particle 9 when light is absorbed by absorption
- Heat conduction represents a thermal resistance between the particles 9 and the optical element 2. In this way, the temperature of the optical element 2 is kept correspondingly low.
- the thermal conductivity of the insulating element 3 is directionally independent or isotropic and is comparatively large, the heat is very well distributed, but the thermal resistance perpendicular to the insulating element 3, which is formed by the insulating element 3, is comparatively low.
- the thermal resistance perpendicular to the insulating element 3, which is formed by the insulating element 3 is comparatively low.
- Air layer is formed (not shown in the figures).
- the heat is well distributed within the insulating material 3, but the thermal resistance between the particle 9 and the optical element 2 is still particularly large due to the air layer.
- Light entry surface 25 of the optical element 2 on the one hand and the insulating member 3 on the other hand this is preferably at least 1 mm, more preferably at least 2 mm.
- FIGS. 2 and 3 In the example sketched in FIGS. 2 and 3, FIG.
- Light output device still a diffuser 5, which is arranged between the optical element 2 and the insulating member 3.
- the diffuser 5 may consist of plastic.
- the lens 5 itself constitutes an optical element, which is protected by the insulating member 3 in an analogous manner.
- the light-emitting device preferably also has a surrounding element 4, which is designed and arranged in such a way that it has both the optical element 2 and the insulating element 3. especially dustproof - includes. In this way, it can be practically prevented that a particle unintentionally accumulates on the light entry surface 25.
- the design may be such that - as indicated in Fig. 2 - the enclosure member 4 has a hollow cylindrical portion B and the optical element 2 has a cylindrical outer surface, with which it contacts the hollow cylindrical portion B and also the insulating member 3 has a cylindrical outer surface with which it contacts the hollow cylindrical region B of the surrounding element 3.
- the shape is in each case circular cylindrical.
- the enclosing element 4 can be designed and arranged such that it delimits the light entry surface 25 of the optical element 2.
- Vorzugswiese the design is further such that the light emitting element 1 is arranged directly or indirectly supported on the surrounding element 4.
- the surrounding element 4 preferably consists of a non-translucent material, for example of plastic or of a metal.
- the enclosing element may be a refiect element, which is preferably further designed to influence the light, in particular the light that has exited the optical element 2 again.
- the enclosure element 4 can - as outlined - be formed from one piece, but it can also consist of several pieces.
- the light-emitting arrangement also has an annular reflector element 8, for example in the form of a reflector foil, which is arranged on the side of the insulating element 3 opposite the optical element 2.
- the light-emitting arrangement forms part of a luminaire, in particular a radiator.
- the lamp may be designed for a light output down.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Projection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202012102644U DE202012102644U1 (de) | 2012-07-17 | 2012-07-17 | Lichtabgabeanordnung und Leuchte mit einer Lichtabgabeanordnung |
| PCT/EP2013/064878 WO2014012875A1 (de) | 2012-07-17 | 2013-07-15 | Lichtabgabeanordnung und leuchte mit einer lichtabgabeanordnung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2875287A1 true EP2875287A1 (de) | 2015-05-27 |
| EP2875287B1 EP2875287B1 (de) | 2023-03-29 |
Family
ID=48790467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13736916.1A Active EP2875287B1 (de) | 2012-07-17 | 2013-07-15 | Lichtabgabeanordnung und leuchte mit einer lichtabgabeanordnung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9810415B2 (de) |
| EP (1) | EP2875287B1 (de) |
| CN (1) | CN104412040B (de) |
| DE (1) | DE202012102644U1 (de) |
| WO (1) | WO2014012875A1 (de) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3120352A (en) | 1960-12-31 | 1964-02-04 | Akita Tadayoshi | Spot light unit |
| DE1201278B (de) * | 1962-05-04 | 1965-09-23 | Quarzlampen Gmbh | Operationsleuchte |
| US3302019A (en) * | 1964-09-29 | 1967-01-31 | Smithcraft Corp | Incandescent light fixture improvements |
| US3725697A (en) | 1969-10-03 | 1973-04-03 | Holophane Co Inc | Luminaire comprising means for reducing temperature of exterior refractor |
| DE4305633A1 (de) * | 1992-02-24 | 1993-10-07 | Valeo Vision | Verbesserung an Linsen-Scheinwerfern |
| FR2687761B1 (fr) | 1992-02-24 | 1999-04-02 | Valeo Vision | Projecteur comportant des moyens perfectionnes d'arret de certaines parties du rayonnement, notamment pour vehicule automobiles. |
| US5703374A (en) * | 1996-08-08 | 1997-12-30 | Actinic Systems, Inc. | Telecentric NUV-DUV irradiator for out-of-contact exposure of large substrates |
| WO1999064783A1 (en) | 1998-06-11 | 1999-12-16 | Spectra Lighting Pty. Ltd. | An in ground light |
| US6527422B1 (en) * | 2000-08-17 | 2003-03-04 | Power Signal Technologies, Inc. | Solid state light with solar shielded heatsink |
| JP2002174720A (ja) * | 2000-12-06 | 2002-06-21 | Mitsubishi Electric Corp | 紫外線吸収装置及びこれを用いた光学装置 |
| DE102004018424B4 (de) * | 2004-04-08 | 2016-12-08 | Docter Optics Se | Verfahren zur Herstellung einer Linse |
| FR2898403B1 (fr) | 2006-03-07 | 2012-12-14 | Valeo Vision | Lentille pour module optique de dispositif d'eclairage pour vehicule automobile |
| DE102008010029B4 (de) * | 2008-02-20 | 2017-11-16 | Hella Kgaa Hueck & Co. | Scheinwerfer für Fahrzeuge |
| TWM366647U (en) * | 2009-05-15 | 2009-10-11 | Hui-Yu Chen | Water proof LED lamp |
-
2012
- 2012-07-17 DE DE202012102644U patent/DE202012102644U1/de not_active Expired - Lifetime
-
2013
- 2013-07-15 CN CN201380035269.7A patent/CN104412040B/zh not_active Expired - Fee Related
- 2013-07-15 EP EP13736916.1A patent/EP2875287B1/de active Active
- 2013-07-15 US US14/415,178 patent/US9810415B2/en not_active Expired - Fee Related
- 2013-07-15 WO PCT/EP2013/064878 patent/WO2014012875A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014012875A1 (de) | 2014-01-23 |
| US9810415B2 (en) | 2017-11-07 |
| CN104412040A (zh) | 2015-03-11 |
| DE202012102644U1 (de) | 2013-10-21 |
| CN104412040B (zh) | 2018-06-22 |
| US20150176827A1 (en) | 2015-06-25 |
| EP2875287B1 (de) | 2023-03-29 |
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