DE202013009434U1 - Lamp - Google Patents

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Publication number
DE202013009434U1
DE202013009434U1 DE202013009434U DE202013009434U DE202013009434U1 DE 202013009434 U1 DE202013009434 U1 DE 202013009434U1 DE 202013009434 U DE202013009434 U DE 202013009434U DE 202013009434 U DE202013009434 U DE 202013009434U DE 202013009434 U1 DE202013009434 U1 DE 202013009434U1
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Germany
Prior art keywords
lamp
arrangement
leds
envelope
led
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DE202013009434U
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German (de)
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VOSLA GmbH
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VOSLA GmbH
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Priority to DE102013213684 priority Critical
Priority to DE102013213684.6 priority
Application filed by VOSLA GmbH filed Critical VOSLA GmbH
Priority to DE202013009434U priority patent/DE202013009434U1/en
Publication of DE202013009434U1 publication Critical patent/DE202013009434U1/en
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    • 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/23Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/27Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
    • 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
    • F21V29/502Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/506Cooling arrangements characterised by the adaptation for cooling of specific components of globes, bowls or cover glasses
    • 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
    • F21V29/60Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/65Cooling arrangements characterised by the use of a forced flow of gas, e.g. air the gas flowing in a closed circuit
    • 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
    • F21V29/60Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • F21V29/677Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans the fans being used for discharging
    • 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
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/04Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/061Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being glass
    • 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
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/04Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • 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
    • F21V23/00Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0464Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
    • 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
    • F21Y2107/00Light sources with three-dimensionally disposed light-generating elements
    • 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

A lamp, in particular a retrofit lamp, with a lamp base, with an at least partially transparent closed casing connected to the lamp base, which is designed to act as a heat sink for the lamp, with a luminous means arrangement which contains a multiplicity of optoelectronic components which are inside the envelope are arranged in a 4π arrangement so that they act in all spatial directions, with a gaseous heat transfer medium, which is introduced in the interior of the shell and which is adapted to transport generated by the lamp arrangement thermal energy to the acting as a heat sink envelope ,

Description

  • FIELD OF THE INVENTION
  • The present invention relates to an LED-based lamp, in particular a so-called retrofit lamp.
  • TECHNICAL BACKGROUND
  • An incandescent lamp is an artificial light source in which an electrical conductor is heated by electric current and thereby excited to shine. The widespread design of this incandescent lamp with screw base is colloquially referred to as a light bulb due to the shape of the glass bulb. Conventional incandescent lamps generally consist of a socket including the electric power supply in the squeeze foot and a glass bulb, which shields the filament and its holder from the outside environment. Such incandescent lamps have a relatively low luminous efficacy and high thermal radiation, and therefore low energy efficiency, so that the majority of the electrically supplied energy is emitted in the form of heat energy and only to a lesser extent in the form of light. Among other things, since 2008 in the European Union on the basis of Ecodesign Directive 2005/32 / EC phased production and distribution bans on incandescent lamps with low energy efficiency implemented.
  • When looking for replacement products of incandescent bulbs, it is important to remember that these replacement products can be used in existing luminaires without requiring a change in the wiring of the luminaire. This should apply to both conventional ballasts (CCG) and electric ballasts (IVG), and also to dimmable systems.
  • For the replacement of incandescent lamps are increasingly used on light emitting diode (LED) based lamps. A light-emitting diode (or "LED" for short) is a light-emitting semiconductor component whose electrical properties correspond to those of a diode. If electrical current flows through the diode in the forward direction, it emits light, infrared radiation or also UV radiation with a wavelength dependent on the semiconductor material and the doping of the particular semiconductor material used.
  • In contrast to the conventional incandescent bulb with glass bulb, filament and socket LEDs are not temperature radiators, so that their luminous efficacy is very high. LEDs emit light in a limited spectral range that is nearly monochrome. In addition, they are characterized by a very long life, are insensitive to shocks and do not require a hollow body that could implode. Meanwhile, LEDs are also available with sufficiently high light output, so that they can also be used for applications with high light radiation. At the time of registration, the available luminous flux of LEDS is so high that, with a comparable size and comparable production costs, even with an electrical comparison, they can increasingly compete with incandescent lamps.
  • In the course of the implementation of Ecodesign Directive 2005/32 / EC Increasingly so-called retrofit lamps are offered, which are light sources which resemble the design of a known incandescent lamp and which thus have a lamp base which can be used in a conventional lamp socket. Such retrofit lamps are often mentioned in the literature, for example in the DE 20 2013 000 980 U1 and the DE 10 2009 035 515 A1 , In LED-based retrofit lamps, the corresponding LEDs are arranged inside the glass bulb, for example in the DE 20 2011 000 010 U1 , of the DE 20 2013 000 980 U1 and the DE 10 2007 038 216 A1 are described.
  • The present invention, as well as the idea underlying it, will be explained below with reference to such an LED-based retrofit lamp, but without the invention being restricted thereto.
  • LED based lamps typically require a heat sink to dissipate the heat selectively generated by the plurality of LEDs used and to prevent overheating of the LEDs from adversely affecting their function and life. The LEDs are therefore usually coupled to a heat sink. Due to the heat sink, there are limitations in the design and placement of the LEDs within the glass bulb of the lamp. Since LEDs - within a respective opening angle - can only emit light in one direction, the light shading of the rear side of the LEDs, which is not present in the case of a filament of an incandescent lamp, results. Nevertheless, to send out light in all directions, there are various solutions:
    In the DE 20 2013 000 980 U1 the LEDs are each arranged on a plane perpendicular to the longitudinal axis of the lamp plane, so that this lamp preferably emits a light beam directed in the lamp longitudinal axis, but not light in all directions.
  • In the DE 20 2011 000 010 U1 be placed on a heat sink LED components in different spatial directions distributed within the glass bulb. However, such a relatively massive heat sink structure in the interior of the glass bulb for design reasons, not very appealing.
  • In the DE 10 2007 038 216 A1 is formed in the glass envelope of the lamp, a part-spherical body having recesses on its peripheral surface, which are formed as a support for the LEDs. Here, too, a radiation of light in all directions is possible, but this solution is not very attractive for design reasons, since this hemispherical body is visible from the outside.
  • SUMMARY OF THE INVENTION
  • Against this background, the present invention has the object to provide a particular design-technically improved lamp with improved heat dissipation.
  • According to the invention this object is achieved by a lamp having the features of patent claim 1.
  • Accordingly, a lamp, in particular a retrofit lamp is provided with a lamp base, with an associated with the lamp base, at least partially transparent closed envelope, which is designed to act as a heat sink for the lamp, with a lighting arrangement, which a plurality of optoelectronic Includes components that are arranged within the shell in such a 4π arrangement that they act in all directions, with a gaseous heat transfer medium, which is introduced in the interior of the shell and which is adapted to the thermal energy generated by the lamp assembly to the Heatsink acting envelope to transport.
  • The finding of the present invention is that a heat sink provided especially for cooling the heat generated by the LED components on the one hand requires a relatively large space requirement in the interior of the lamp. In addition, due to the required cooling effect, these relatively large heat sinks are typically visible from the outside through the transparent or partially transparent envelope, which is not very appealing for design reasons.
  • The idea of the present invention is now to dispense with such massive, required for cooling the optoelectronic devices heatsink. For cooling, the already existing shell of the lamp is used as well as the filling gas present in the interior of the shell. This filling gas designed as a heat transfer medium absorbs the thermal energy emitted by the respective optoelectronic components and transports them to the comparatively large-area casing which can deliver the heat to the outside.
  • It can thus be relatively inexpensive lamps provide that can be produced easier and cheaper due to the elimination of the relatively large and also heavy heat sink.
  • In addition, the lamps according to the invention are also advantageous for design reasons, since only the corresponding optoelectronic components are visible from the outside, but not the less responsive heat sinks.
  • Preferably, the lamp is designed as a retrofit lamp. A retrofit lamp is understood to mean a lamp which has a pear-shaped shell, so that this lamp has a light bulb-like design.
  • The term "acting" in the context of claim 1, in the case of an optoelectronic component designed as an LED, denotes the emission of light from the optoelectronic component to the outside. In the case of an optoelectronic component designed as a sensor, the term "act" denotes the ability to be able to record a measurement parameter, for example light.
  • Advantageous embodiments and further developments will become apparent from the other dependent claims and from the description with reference to the figures of the drawing.
  • The heat transfer medium has a relatively large heat capacity. The heat capacity indicates how much thermal energy a heat transfer medium absorbs or releases based on the temperature change.
  • In a particularly preferred embodiment, the heat transfer medium is formed as a relatively large molecular weight gas. The large molecular heat transfer medium is designed to generate generated by the optoelectronic components thermal energy z. B. by convection to transport acting as a heat sink envelope. In an additional or alternative preferred embodiment, the heat transfer medium is formed as an organic gaseous compound.
  • In a preferred embodiment, the heat generated by the lamp assembly is thermal Energy is transported by convection to the acting as a heat sink envelope. The heat transfer takes place here without additional funds only due to the heat generated by the heat generated. Thermal convection, often simply referred to as convection, in this case refers to the carrying of thermal energy or, in other words, a change in location of easily movable, gaseous molecules that carry stored heat with them. In this way, in contrast to previously known solutions to be provided for cooling massive massive heatsinks are omitted, since their function by already existing means, in particular by the filling gas itself and the lamp shell, are met.
  • In a likewise preferred additional or alternative preferred embodiment, a device for generating flow can be provided inside the envelope. The device for generating flow is designed to transport the thermal energy generated by the lamp arrangement through the flow generated in this way to the envelope which functions as a heat sink. Here, therefore, there is a generation of the heat flow through borrowed funds. The device for generating flow can be designed, for example, as a blower, fan or the like.
  • In a preferred embodiment, the gas pressure of the heat transfer medium in the interior of the shell is more than 1 bar, preferably more than 20 bar.
  • Preferably, the shell consists of a glass or plastic body, which is completely transparent or at least partially transparent. Completely transparent in this context means that the envelope is translucent in the spectral wavelength range of light visible to humans and, if necessary, also in the UV range and in the infrared range. Alternatively, it would also be conceivable if the envelope is designed as a frosted glass body or contains such. Milk glass body refers to an opaque glass, which, although translucent, but at least partially opaque, whereby the glass looks white and cloudy. In this case, the milk glass can be produced by admixing a turbid substance or by subsequent roughening of the surface. As milk glass body are not only glassy body, but also milky plastic body to understand.
  • In a preferred embodiment, the shell connected to the lamp cap is gas-tight for the gaseous heat transfer medium contained therein, so that the relatively large molecular weight elements of the heat transfer medium inside the shell can not escape. Inside the envelope, therefore, no vacuum must be generated or a special gas can be introduced at low pressure. Rather, a specific, for example, large-molecular gas is deliberately introduced into the interior of the shell. The higher the gas pressure inside the shell, the better the heat transfer resulting from the increasing convection. This makes the production less expensive.
  • In a preferred embodiment, the luminous means arrangement comprises a multiplicity of optoelectronic components designed as LEDs. These optoelectronic components are provided within the envelope in a 4π arrangement in such a way to emit light in all spatial directions. The advantage is that this lamp according to the invention thus emits a light comparable to a conventional incandescent lamp in all spatial directions, so that therefore there are no shading areas or areas with lower light emission, which are generally perceived as unpleasant or less comfortable by a user.
  • In a preferred embodiment, the number and / or the type and / or the orientation of the LEDs used are provided such that the lamp emits white light during operation. Such a lamp according to the invention with corresponding LEDs can therefore appear in visual spectral range lights and to the human eye apparently or - depending on the type of mixture actually - generate white light. Such white light can be generated, for example, by means of a blue light emitting diode and a broadband luminescent dye, for example phosphorus, by mixing the blue light produced by the blue light emitting diode with the yellow light generated by the luminescent dye. In addition, white light can be produced by means of an ultraviolet light emitting diode and a luminescent dye for red, green and blue. The light colors generated by the three luminescent dyes red, green and blue become white light by suitable mixing. In addition, there are many other possibilities for generating white light by means of various LEDs.
  • In a further preferred refinement, the illuminant arrangement has red light, blue light, yellow light, violet light and / or green light-emitting light-emitting diodes. In addition, it would also be conceivable if the light emitting diodes emit infrared or ultraviolet light. By suitable mixing of the light emitted by these light-emitting diodes, a preferred desired coloring can be achieved.
  • In a preferred embodiment, at least a portion of the LEDs are arranged in series with each other. Preferably, the LEDs are in one like that mentioned LED strip (engl.: LED strip) connected in series to each other. Preferably, a plurality of series circuits of LEDs arranged in series are provided. The switching in series of different LEDs is advantageous insofar as the corresponding lamp arrangement can be operated in this way with a higher supply voltage, which increases the efficiency. Also preferably, a plurality of LEDs arranged in series with each other are arranged parallel to each other. Several such series-connected LED arrays, which are connected in parallel with each other, can be operated with the same supply voltage and increase the luminous efficacy.
  • In a preferred embodiment, a Zener diode is connected in antiparallel to each LED and / or to a series connection of a plurality of LEDs. The antiparallel Zener diodes are designed to prevent that the possible failure of a single LED of a series circuit of LEDs leads to a complete malfunction of the entire lamp. In addition, safety is also increased in this way.
  • In an additional or alternative embodiment, the luminous means arrangement has a multiplicity of optoelectronic components designed as photosensitive sensors. These sensors are provided within the envelope in a 4π arrangement such as to be light-sensitive in all spatial directions. The lamp according to the invention can thus also be used as a highly sensitive sensor which is sensitive in all spatial directions. In this case, the sensor can be used in particular as a light-sensitive sensor, in which case the optoelectronic components are designed as light-sensitive sensors.
  • In a preferred embodiment, the optoelectronic components are formed in strip strips with successively arranged and / or switched optoelectronic components. Such a strip of tape, which is sometimes also referred to as a "strip", is for example a solid or flexible semiconductor body in whose surface the corresponding semiconductor components are introduced. In addition, it would also be conceivable that individual semiconductor components are provided which are fastened to a strip-shaped material which forms the tape strip and are electrically connected to one another.
  • Advantageously, the tape strip is in a three-dimensional arrangement, for. B. bent spirally, to ensure the appropriate 4π arrangement already by the curved structure. The particular advantage here is that the various optoelectronic components do not have to be arranged and mounted in a complex manner in order to ensure the 4π arrangement, but that this already takes place to a certain extent automatically by a suitable bending of the tape strip. The production of such lamps according to the invention is thus significantly simplified.
  • In a further, likewise preferred embodiment, at least one strip-shaped semiconductor body is provided which is shaped and formed in three dimensions and in which the optoelectronic components are introduced from several sides in such a way that they act in all spatial directions. For example, a suitable cubic semiconductor body may be provided, in which optoelectronic components are introduced into all or at least some of the surfaces of the semiconductor body. By way of example, semiconductor components can be introduced both on the front side and on the back side of the semiconductor body, so that they emit in both sides. In the case of a cubic semiconductor body, theoretically the semiconductor devices could be incorporated in all six surfaces or at least in four circumferential surfaces.
  • In a further, likewise preferred embodiment, the lamp cap is designed as a socket with Edison thread. Preferably, one is provided as E40, E27, E14 and / or E10 socket. The base of a lamp is used to fix the lamp in a lamp socket and to contact electrically. The design of the lamp holder limits the permissible power and current consumption of the lamp operable therein. The dimensions of the so-called Edison thread are in the DIN 40400 and also in the IEC 60238: 1998 standardized. The advantage of using the Edison thread is that the lamps according to the invention in conventional lamp holders, which were thus designed for conventional incandescent lamps, can be screwed so that users can continue to use their previous lights by the aforementioned EU incandescent lamp manufacturing and sales ban.
  • In a particularly preferred embodiment, the luminous means arrangement has a measuring circuit which measures the current through the luminous means arrangement and / or measures the voltage drop across the illuminant arrangement. Additionally or alternatively, a measurement of the temperature generated by the LEDs can be made. In this way, for example, a defective LED can be detected within the light assembly, which is indicated for example by a suitable display device. In addition, using these means would also be possible to detect overheating of the lamp and appropriate Take measures for cooling. Such measures could be, for example, switching off the lamp or dimming down the light output.
  • By means of the measuring circuit according to the invention, it is also possible, for example, to measure the aging of individual LEDs or the entire luminous means arrangement. In this case, the voltage drop across the lamp arrangement of individual or all light-emitting diodes is measured. From the measurement result is closed to the aging state of the lamp assembly. This measured, age-related voltage drop is a good indicator of the aging and thus the expected remaining life of the LED-based illuminant assembly. For example, the measured voltage could be compared with a reference value, and it could be determined from the comparison result whether the LED illuminant arrangement is reaching or threatening to reach its end of life. The measurement of this voltage drop, the comparison and the evaluation can be done automatically, for example, at regular intervals or, for example, each time the lamp is put into operation again. In this way, unnecessary and safety-related premature replacement of the lamp can also be avoided, as well as too long operation with reduced luminosity, which may entail, for example, safety problems or at least a loss of comfort in the event of a failed lamp.
  • In a preferred embodiment, a drive circuit connected to the socket is provided, which is designed to convert a supply voltage tapped off via the socket to a DC voltage and to operate the lamp arrangement with this DC voltage. In addition, it would also be conceivable to transform the supply voltage, for example the mains alternating voltage, down to such a low-voltage direct voltage, which is sufficient for operating the LEDs. Preferably, the driver circuit is disposed within the socket. Depending on the type of lamp, the respective type of converter can be selected with a view to achieving the best system performance. For example, if relatively long lamp modules, such as the L58W fluorescent lamp, are to be replaced, boost converters are preferred, while, for example, for short lamps, such as L18W Modules, used as a buck converter transducer (buck converter) can be used.
  • The above embodiments and developments can, if appropriate, combine with each other as desired. Further possible refinements, developments and implementations of the invention also include combinations, not explicitly mentioned, of features of the invention described above or below with regard to the exemplary embodiments. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.
  • CONTENT OF THE DRAWING
  • The present invention will be explained in more detail with reference to the exemplary embodiments indicated in the schematic figures of the drawings. It shows:
  • 1 a schematic diagram of a lamp according to the invention;
  • 2 a schematic diagram of a trained as a retrofit lamp lamp according to the invention;
  • 3 a further embodiment of a retrofit lamp according to the invention;
  • 4 a further embodiment of a retrofit lamp according to the invention;
  • 5 a schematic diagram of the arrangement of the LED strips inside the shell of the lamp;
  • 6 a schematic diagram of a further arrangement of the LED strips inside the envelope of the lamp;
  • 7 Based on an embodiment, the structure of an LED strip for a lamp according to the invention;
  • 8th another embodiment of an LED strip;
  • 9 another embodiment of an LED strip;
  • 10 a block diagram for explaining the interconnection of the lamp assembly.
  • The accompanying drawings are intended to provide further understanding of the embodiments of the invention. They illustrate embodiments and, together with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the stated advantages will become apparent with reference to the drawings. The elements of the drawings are not necessarily shown to scale to each other.
  • In the figures of the drawing are the same, functionally identical and equivalent elements, features and components - unless otherwise is executed - each provided with the same reference numerals.
  • DESCRIPTION OF EMBODIMENTS
  • 1 shows a schematic diagram of the structure of a lamp according to the invention. The lamp is here with reference numerals 10 denotes and includes a lamp cap 11 , a case 12 , a lighting arrangement 13 and a gaseous heat transfer medium 14 ,
  • The lamp base 11 refers to that part of the lamp 10 , which makes the mechanical and electrical contact with a lamp or lamp socket. The lamp base 11 is with an at least partially transparent, closed shell 12 connected, which is also referred to as a glass bulb. This glass bulb 12 may be partially mirrored on the inside, matted (that is roughened) or made of opaque glass (frosted glass). The interior 15 of the glass bulb 12 is with a gas 14 filled, whose function will be explained below. In the interior 15 the shell 12 is also a lighting arrangement 13 provided, which a plurality of only schematically illustrated optoelectronic components 16 contains. These optoelectronic components 16 are so inside the glass bulb 12 arranged so that they act in all spatial directions (ie 4π). The optoelectronic components 16 For example, they may be formed as LEDs, light-sensitive sensors, laser diodes and the like.
  • The operation of the lamp according to the invention will be described below 10 explains:
    That inside 15 of the glass bulb 12 provided gas 14 is preferably formed as a large molecular gas. The gas 14 and preferably also the material of the shell 12 have a very high heat absorption capacity.
  • During operation of the lamp arrangement 13 For example, the optoelectronic components formed as LEDs heat up 16 , The operation of these LEDs 16 Heat generated according to the invention of the as a heat transfer medium 14 trained large molecular gas 14 taken and towards the shell 12 transported. The case 12 , which preferably has a high thermal conductivity, so to speak acts as a heat sink and conducts from the gas 14 stored heat to the outside. By means of the heat transfer medium 14 Thus, by convection, a heat conduction to the shell 12 , which consequently implements a very effective and nonetheless very simple cooling.
  • 2 shows a particularly preferred embodiment of the lamp according to the invention 10 , The lamp 10 is here as a so-called retrofit lamp 10 formed, which thus has a design comparable to a conventional incandescent lamp.
  • In contrast to a conventional incandescent lamp, in the interior 15 the shell 12 a protective gas is provided for the protection of the filament, acts in the inventive retrofit lamp of the bulb-like glass bulb together with the gas contained therein as a coolant.
  • The base 11 that with the sheath 12 connected in the present case is designed as an Edison lamp socket. For example, an E27 socket for use for general-service lamps can be provided here.
  • Furthermore, here is a spirally formed bulb assembly 13 intended. This helical structure is suitable, analogous to a conventional filament, to emit light in all spatial directions, ie in the 4π direction. This spiral-shaped illuminant arrangement 13 can be realized for example by a bendable wire, strip or semiconductor body, on whose surface corresponding LED components (in 2 not shown) and are electrically connected to each other.
  • 3 shows a further embodiment of a trained as a retrofit lamp lamp according to the invention 10 , The base 11 has an external contact 17 ' as well as a foot contact 18 '' on, via which an electrical supply voltage, typically an AC line voltage, is tapped, provided the lamp 10 is screwed in a lamp socket.
  • Inside the pedestal 11 are respective electrical connection lines 20 provided with a likewise inside the pedestal 10 provided drive circuit 21 are electrically connected. This drive circuit 21 has a converter circuit 22 and a driver circuit 23 on. By means of the converter circuit 22 the AC mains voltage is converted into a DC voltage for operating the LED-based illuminant arrangement 13 changed. In addition, typically the amplitude of the supply voltage is stepped down. The driver circuit 23 serves to control the lamp arrangement 13 or the corresponding LEDs 16 , Depending on the application, the driver circuit 23 comprise a boost converter or buck converter, depending on which supply voltage for the lamp assembly 13 is needed.
  • Between the pedestal 10 and the shell 12 is inside the lamp 10 furthermore one fastening device 24 provided, which is the mechanical fixation and attachment of the inside 15 the shell 12 provided lighting arrangement 13 serves. In addition, this fastening device acts 24 also carrying out appropriate, from the pedestal 11 or the drive circuit contained therein 21 coming supply lines 25 , These supply lines 25 connect the drive circuit 21 with the lamp arrangement 13 , The fastening device 25 also has an axial, along the lamp axis 28 provided, cylindrical support device 26 on, the support of the lamp assembly 13 serves and which the illuminant arrangement 13 wearing.
  • The lighting arrangement 13 has a variety of LED strips 27 on. The LED strips 27 are here substantially radially to the support device 26 arranged around and spaced from each of the same distance. The LED strips 27 run in the embodiment in 3 substantially parallel to one another and substantially axially relative to the axis 28 the lamp 10 ,
  • The LED strips 27 each include a plurality of LED devices arranged in series with each other as described below with reference to FIG 6 is still set forth. The LED strips 27 are on one side over the supply lines 25 with the fastening device 24 and the driver circuit 23 connected. On the other side are the LED strips 27 via further supply lines 29 and the support device 26 also with the drive circuit 21 connected. For example, is on the supply line 29 a positive supply potential VDD and the supply lines 25 are subjected to a reference potential, for example the reference ground GND. Thus falls over each of the LED strips 27 the supply voltage VDD-GND.
  • 4 shows a further embodiment of a trained as a retrofit lamp lamp according to the invention 10 , In contrast to the embodiment in 3 Here are the different LED strips 27 arranged so that they are in the direction of the lamp axis 28 and to the front 30 towards each other. Due to these inclinations of the LED strips 27 This results in a better 3D light illumination, as in this way in particular the front side 30 the shell 12 not darkened, but over the front page 30 also white light is emitted.
  • On the inner surface of the shell 12 is in the embodiment in 4 a coating 35 intended. In this coating 35 For example, it is a suitable photoluminescent material to produce a desired light in this way. For example, the LEDs 16 the LED strip 27 be blue light-emitting LEDs. In this case, it is advantageous if a cerium-doped yttrium-aluminum garnet powder for the coating 35 is used, which represents a yellow phosphor. When combining the blue light of the blue LED 16 The yellow phosphor of the yttrium aluminum garnet powder gives off white light from the lamp 10 is blasted to the outside.
  • The 5 and 6 show on the basis of a schematic diagram two further embodiments, such as the LED strips 27 internally 15 the shell 12 the lamp 10 can be arranged.
  • In the embodiment in 5 There are four LED strips 27 arranged so that they each on a side surface 31 a virtual pyramid 32 are arranged, which are towards the front side 30 the shell 12 rejuvenated.
  • In the embodiment in 6 are also four LED strips 27 provided, each on adjacent four surfaces 33 a cuboid 34 (Cube side surfaces) are arranged so that a respective LED strip 27 a diagonal of the rectangular surface 33 of the cuboid 34 forms, passing through the LED strip 27 Do not cut running lines in the projection.
  • 7 shows on the basis of an embodiment, the structure of an LED strip 27 for a lamp according to the invention. The LED strip 27 includes a substrate 40 , which may be formed for example of glass, hard glass, quartz glass, ceramic, plastic or the like. The substrate 40 is preferably transparent.
  • On the substrate 40 are a variety of LED chips 41 arranged. These LED chips 41 are in the substrate 40 introduced, applied to the surface, there fastened or in specially provided recesses in the substrate 40 arranged and fastened. The attachment of the LED chips 41 can be done for example by means of an adhesive layer, a bond, an adhesive or fastened compounds or the like.
  • Each of these LED chips 41 includes at least one LED semiconductor device. Every LED chip 41 is thus adapted to emit light of a certain wavelength according to the physical properties of the semiconductor material used and its doping.
  • The different LED chips 41 are on the elongated substrate 40 in series with each other, that is arranged one after the other. Neighboring LED chips 41 are over interconnections 42 electrically connected to each other. Each LED chip contains 41 at least two contact terminals A, K, wherein one of these terminals, the anode contact A and the other terminal forms the cathode contact K. The electrical contacting of adjacent LED chips 41 takes place in each case by means of bonding contacts by contacting a respective anode contact A of a first LED chip 41 with a cathode contact K a to this LED chip 41 neighboring further LED chips 41 ,
  • The LED strip 27 has at its two opposite ends in each case a contact terminal (Lead) 43 . 44 on, each with the outermost LED chips 41 of the LED strip 27 over a connecting line 42 are connected. For fixing these contact connections 43 . 44 is a fixing device 45 intended.
  • Additionally (in 7 not shown) may be provided a transparent outer sheath-shaped tube, which the LED strip 27 as well as the individual LED chips 41 on the substrate 40 to protect.
  • In 7 Assume that all LED components on the LED chips 41 are formed identically and thus emit a light of the same wavelength. It would also be conceivable, however, that different light-emitting LED chips 41 are present, for example, yellow light and blue light emitting LEDs, which is emitted when mixing the light beams generated white light. In the same way, of course, any other combinations of different light-emitting LEDs would be possible.
  • Alternatively, it would also be conceivable that the substrate 40 a semiconductor substrate. In this case, the LED chips could 41 directly in the semiconductor body 40 of the substrate 40 , For example, by diffusion and implantation, are introduced. This is particularly advantageous from a manufacturing point of view, but would be here for the otherwise brittle semiconductor body of the substrate 40 z. B. an additional carrier required, which is the substrate 40 would have to stabilize. Alternatively, it would also be conceivable that the substrate formed as a semiconductor body 40 is formed so thin that it is flexible and is attached, for example, on a flexible film.
  • 8th shows a further embodiment of an LED strip 27 , This LED strip 27 has a cubic shape and thus includes various rectangular surfaces 50 , On at least two of these rectangular surfaces 50 are corresponding LED chips 41 attached or, for example, in the case of a semiconductor body 40 trained LED strip 27 , directly in the semiconductor body 40 embedded. Preferably, the different LED chips 41 or LED components 16 at least on two opposite rectangular surfaces 50 of the semiconductor body 40 arranged. After that, the different LEDs 16 or LED chips 41 on different surfaces 50 of the semiconductor body 40 are arranged or introduced, already results from the cubic structure of the substrate 40 a radiation of the different LEDs 16 emitted light in different directions.
  • 9 shows a further embodiment of an LED strip 27 for a lamp according to the invention 10 , Here lies the substrate 40 of the LED strip 27 already in curved form, so that at least one non-planar, curved surface 51 is available. On this non-level surface 51 are the corresponding LED chips 41 or LED components 16 arranged or introduced. Due to the curved structure of the LED strip 27 thus also results in a radiation of the different LEDs 16 emitted light in different directions.
  • 10 shows a block diagram of another embodiment of an LED strip according to the invention 27 , The first contact connection 43 is in operation with a first supply potential V1 and the second contact connection 44 is acted upon in operation with a second supply potential V2. Between these contact connections 43 . 44 is a series connection of four LEDs 52 connected. It is assumed that in the present case all LEDs 52 are identical. Anti-parallel to each of these LEDs 52 is each a zener diode 53 connected. These anti-parallel Zener diodes 53 serve the purpose in case of failure of an LED 52 To maintain the operation of the LED series connection with the remaining, functioning LEDs. Otherwise, in the event of a failure of a single series-connected LED 52 the entire LED series circuit will be inoperable.
  • Furthermore, a measuring circuit 54 intended. This measuring circuit 54 serves the purpose, the current, the voltage, the temperature and / or possibly other parameters of the LED strip 27 to investigate. For example, the measurement of the current by means of a resistive element, which is in series with the LEDs 52 is arranged. The measurement of the voltage, for example, by means of a parallel resistor. In addition, the temperature can be derived from the determined current.
  • Although the present invention has been fully described above with reference to preferred embodiments, it is not so limited, but modifiable in many ways.
  • In particular, the present invention is not limited to retrofit lamps with Edison socket. For example, another type of socket, such as a socket, bayonet socket, two-pin socket, and the like, may be used. Basically, so-called socketless lamps would be conceivable in which the base is realized via contact wires.
  • The shape of the shell is not limited to a pear-shaped incandescent-like design, but may be of any design, provided that it does not deviate from the core idea of the invention. For example, the invention is also applicable to a krypton lamp, a halogen-type lamp and the like.
  • LIST OF REFERENCE NUMBERS
  • 10
    lamp
    11
    (Lamp) Base
    12
    Shell, glass bulb
    13
    Lamp positioning
    14
    Gas, heat transfer medium
    15
    Inside / interior of the shell
    16
    optoelectronic component, LED
    17
    outside Contact
    18
    foot contact
    20
    electrical connection lines
    21
    drive circuit
    22
    converter circuit
    23
    driver circuit
    24
    fastening device
    25
    supply lines
    26
    support device
    27
    LED strip
    28
    Lamp axis
    29
    supply lines
    30
    front
    31
    side surface
    32
    pyramid
    33
    rectangular surface
    34
    cuboid
    35
    coating
    40
    Substrate, semiconductor body
    41
    LED chip
    42
    connecting line
    43
    first contact connection
    44
    second contact connection
    45
    fixing
    50
    rectangular surface
    51
    curved, non-level surface
    52
    LED component
    53
    Zener diode
    54
    measuring circuit
    A
    anode
    K
    cathode
    GND
    Reference potential, potential of reference ground
    V1, V2
    supply potential
    Vdd
    positive supply potential
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • DE 202013000980 U1 [0006, 0006, 0008]
    • DE 102009035515 A1 [0006]
    • DE 202011000010 U1 [0006, 0009]
    • DE 102007038216 A1 [0006, 0010]
  • Cited non-patent literature
    • Ecodesign Directive 2005/32 / EC [0002]
    • Ecodesign Directive 2005/32 / EC [0006]
    • DIN 40400 [0037]
    • IEC 60238: 1998 [0037]

Claims (20)

  1. Lamp, in particular retrofit lamp, with a lamp base, with an at least partially transparent closed sheath, which is connected to the lamp base and which is designed to act as a heat sink for the lamp, with a luminous means arrangement which contains a plurality of optoelectronic components which are arranged within the envelope in such a 4π arrangement that they act in all spatial directions, with a gaseous heat transfer medium which is introduced in the interior of the casing and which is designed to transport thermal energy generated by the light source arrangement to the casing which acts as a heat sink.
  2. Lamp according to claim 1, characterized in that the heat transfer medium has a relatively large heat capacity.
  3. Lamp according to one of the preceding claims, characterized in that the heat transfer medium are formed as a large molecular gas and / or as organic gaseous compounds.
  4. Lamp according to one of the preceding claims, characterized in that the thermal energy generated by the lamp arrangement is transported by convection to the acting as a heat sink envelope.
  5. Lamp according to one of the preceding claims, characterized in that inside the envelope a means for generating flow, in particular a fan or a fan, is provided, which is adapted to the generated by the lamp arrangement thermal energy through the flow thus generated to the Heatsink acting envelope to transport.
  6. Lamp according to one of the preceding claims, characterized in that the gas pressure of the heat transfer medium in the interior of the envelope is greater than 1 bar, preferably greater than 20 bar.
  7. Lamp according to one of the preceding claims, characterized in that the sheath is formed of a completely transparent material or contains a partially transparent milk glass body.
  8. Lamp according to one of the preceding claims, characterized in that the luminous means arrangement has a plurality of optoelectronic components designed as LEDs, which are provided within the envelope in a 4π arrangement such that they emit light in all spatial directions.
  9. Lamp according to one of the preceding claims, characterized in that the number and / or the type and / or orientation of the LEDs used is provided such that the lamp emits white light during operation.
  10. Lamp according to one of the preceding claims, characterized in that at least a part of the LEDs are arranged in series with each other.
  11. Lamp according to claim 10, characterized in that a plurality of LEDs arranged in series are arranged parallel to one another.
  12. Lamp according to claim 10 or 11, characterized in that connected to each LED and / or to a series connection of a plurality of LEDs at least one Zener diode in anti-parallel.
  13. Lamp according to one of the preceding claims, characterized in that the luminous means arrangement comprises a plurality of optoelectronic components designed as photosensitive sensors, which are provided within the envelope in a 4π arrangement in such a way as to be light-sensitive in all spatial directions.
  14. Lamp according to one of the preceding claims, characterized in that the optoelectronic components are arranged in strip strips with successively arranged and / or switched components.
  15. Lamp according to claim 14, characterized in that the tape strip is bent in a 3D arrangement.
  16. Lamp according to one of the preceding claims, characterized in that at least one strip-shaped semiconductor body is provided which is so 3D-shaped and in which the optoelectronic components are introduced from all sides so that they act in all spatial directions.
  17. Lamp according to one of the preceding claims, characterized in that the lamp cap is designed as a socket with Edison thread, in particular as E40, E27, E14, E10 socket.
  18. Lamp according to one of the preceding claims, characterized in that the lamp arrangement has a measuring circuit which measures the current through the lamp arrangement and / or which measures the voltage drop across the lamp arrangement and / or which measures the temperature generated by the LEDs.
  19. Lamp according to one of the preceding claims, characterized in that there is provided a converter circuit connected to the base, which converter is designed to convert a supply voltage tapped off via the base to a DC voltage.
  20. Lamp according to one of the preceding claims, characterized in that a driver circuit is provided which is adapted to drive the lamp arrangement with a DC voltage.
DE202013009434U 2013-07-12 2013-10-24 Lamp Active DE202013009434U1 (en)

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DE102013213684 2013-07-12
DE102013213684.6 2013-07-12
DE202013009434U DE202013009434U1 (en) 2013-07-12 2013-10-24 Lamp

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DE102014213561.3A Pending DE102014213561A1 (en) 2013-07-12 2014-07-11 Band-shaped illuminating device, lamp and method for producing the band-shaped luminous means device
DE102014213560.5A Pending DE102014213560A1 (en) 2013-07-12 2014-07-11 lamp

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WO2015082087A1 (en) * 2013-12-02 2015-06-11 Clevalux Gmbh & Co. Kg Light tube
AT515191A1 (en) * 2013-12-11 2015-06-15 Siemens Ag Österreich lighting system
DE202014001943U1 (en) 2014-02-28 2014-05-08 Vosla Gmbh led strip, lamp
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EP3037713A1 (en) * 2014-12-23 2016-06-29 DB Netz AG Lighting device for a light signal system for rail traffic
WO2017162530A1 (en) * 2016-03-21 2017-09-28 Osram Opto Semiconductors Gmbh Filament, method for producing same, and lighting means having such filaments
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Also Published As

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HU4525U (en) 2015-04-28
CN203823471U (en) 2014-09-10
EP2824379A1 (en) 2015-01-14
DE102014213561A1 (en) 2015-01-15

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