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
  • F21V5/00—Refractors for light sources
  • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
  • F21V5/005—Refractors for light sources using microoptical elements for redirecting or diffusing light using microprisms
• • 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
  • F21V5/00—Refractors for light sources
  • F21V5/04—Refractors for light sources of lens shape
• • 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
  • F21V7/00—Reflectors for light sources
  • F21V7/0091—Reflectors for light sources using total internal reflection
• • 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 present invention relates to an arrangement for emitting light according to the preamble of claim 1, which has at least one substantially punctiform light source, wherein the light emission by means of a light source upstream of the light-guiding element and a light-guiding element surrounding the reflector.
• the punctual light source used is in particular an LED.
• LEDs are increasingly being used in lighting technology, as they have numerous advantages over conventional light sources such as fluorescent lamps or light bulbs.
• One advantage of LEDs, for example, is that they emit their light predominantly in the direction in which one
• Luminaire construction should also be the actual light output, ie in the direction of the light exit.
• LEDs since targeted influencing of the emitted light beams for directing the light is only possible by positioning specific optical elements directly in the region of the light emission of the LEDs. Due to the high direct component of the light emitted by LEDs and the low influenceability inevitably results in a certain amount of scattered light, which has a very disturbing effect, especially in narrow-beam distributions.
• LED modules in which multicolor LEDs are used for example in the case of RGB modules
• a specific color mixture is required in order ultimately to achieve homogeneous light output with a desired mixed color.
• an object of the present invention to provide a novel concept for influencing the light output in lighting arrangements with essentially punctiform light sources, in particular LEDs, with the aid of which the abovementioned objectives are achieved.
• an effective influencing of the light output should be possible, on the other hand should be achieved in the case of using different colored light sources effective color mixing.
• This special light-guiding element is designed substantially cylinder-like, wherein an end face of the cylinder forms a light entry surface. One of the light entry surface opposite side of the cylinder is then at least partially aligned with respect to a longitudinal axis of the cylinder. It is thereby permeable to one part of the light and reflective to another part of the light, in which case the reflected portion of the light over the lateral surface of the cylinder, which with structures for
• Lichtauskopplung is provided, is delivered to a surrounding the light guide element reflector. This special design makes it possible to effectively use all the components of the light emitted by the light source.
• an arrangement for emitting light which has at least one substantially point-shaped light source, a light source in the emission direction upstream of a light-guiding element of a transparent material and a reflector surrounding the light guide, wherein
• the light-guiding element is designed substantially cylinder-like, wherein an end face of the cylinder forms a light entry surface and the
• Light inlet surface opposite side of the cylinder is at least partially inclined relative to a longitudinal axis of the cylinder so that it is transparent to a part of the light and reflective for another part of the light, and wherein the lateral surface of the cylinder is provided with structures for light extraction.
• LEDs are used, which may in particular be different colored LEDs.
• the light entry surface of the light-guiding element is provided with a scattering structure, in particular a microstructure.
• an optical element for example a foil, which has a corresponding scattering structure, can also be provided in the region of the light entry surface.
• the arrangement according to the invention can be used both for a symmetrical and for an asymmetrical light output.
• the light exit surface of the light-guiding element that is the
• Light entry surface opposite side preferably by a lateral surface a recess extending in the light guide, wherein the recess is formed, for example, conical.
• the cone of the cone can be selected. This can be in particular in the range between 0 ° and 45 °.
• Light incident surface opposite surface of the light-guiding element on the one hand, a refraction of light and on the other hand takes place a reflection, preferably formed by an oblique face.
• the reflector surrounding the light guide element according to the invention is preferably in the form of a pot. Again, the shape of the reflection surface can be changed in order to influence the light output in the desired manner.
• the inventive arrangement makes it possible to influence the emission of light from point light sources, in particular LEDs, in a simple but effective manner.
• luminaires with different light emission characteristics can be achieved in a simple manner, without being distinguishable from the outside at first sight.
• Figure 1 shows a first embodiment of an inventive
• FIGS. 2 to 4 are views of the light guide element used in the first embodiment
• Figure 5 is a sectional view of the light-guiding element of Figs. 2 to 4 and
• Figures 6 to 8 are views of a second embodiment of a
• the arrangement according to the invention serves to direct the light emitted by a plurality of punctiform light sources, in particular LEDs.
• a plurality of punctiform light sources in particular LEDs.
• differently colored LEDs for example in the colors red, green and blue-are preferably used in order to achieve mixed light of almost any color location or any desired color temperature by controlling the intensities of the different colors.
• the arrangement 1 can be used, for example, in so-called LED emitters.
• Essential elements of the arrangement 1 according to the invention are on the one hand a pot-shaped reflector 2 and on the other hand a transparent light-guiding element 10, which is arranged approximately in the region of the center of the reflector 2.
• Embodiment of the light-guiding element 10 will be detailed below
• Both elements, ie reflector 2 and light guide element 10, are held by an annular ausgestaltetes holding element 3, via which at the same time also a fastening to or in the - not shown - housing of an LED spotlight takes place.
• the central element of the arrangement according to the invention is the transparent light-guiding element 10, the configuration of which is to be explained in more detail below with reference to FIGS. 2 to 5.
• the light-guiding element 10 which consists of a
• a disk-shaped recess 13 is formed over a circumferential edge region 12, which serves to receive the LEDs 5 shown schematically here, corresponding to the sectional representation of FIG. 5.
• the light entry surface 11 is provided with a light-scattering microstructure.
• the light-scattering effect of this structure achieves a uniform distribution of the light rays without extreme discontinuities. At the same time this ensures the desired color mixing.
• the light entry surface 11 itself is provided with the structure, it could also be provided on the bottom surface of the
• a flat optical element for example, insert a film with a corresponding microstructure. Also in this way, the above-mentioned uniform distribution of the light and a color mixing is achieved.
• the surface 15 is formed by a extending into the light-guiding element 10 recess 16, which is conical.
• the surface 15 is thereby formed inclined with respect to the longitudinal axis I of the cylinder and is formed by the lateral surface of the recess 16.
• Light rays which strike this surface 15 are now transmitted in different ways.
• a first part - represented by the light beam A - is emitted substantially unchanged to the bottom.
• a refraction that is to say a slight deflection of the light beam A, can take place at the transition between the light-directing element 10 and the recess 16.
• the structure 19 provided there is preferably designed such that the Lichtlenkelement 10 laterally leaving rays as perpendicular to
• This preferred lateral light emission is achieved in that the structure 19 is again designed as a microprism structure.
• this structure is formed by an alternating arrangement over the circumference of the lateral surface 18 extending grooves and projections.
• the combination of the light-directing element 10 with the reflector 2 opens up the possibility of achieving very narrow-beam light distributions, despite which a thorough mixing of the light of the LEDs 5 is achieved.
• FIGS. 6 to 8 A second variant of a light-guiding element according to the invention is shown in FIGS. 6 to 8. This is a variant in which an asymmetric Li chtab radiation is achieved. For this purpose, forms the light entry surface eleventh
• opposite surface 15 of the light guide member 10 is not the lateral surface of a conical recess. Instead, the surface 15 is now formed as a one-sided bevel or bevelled end face of the cylinder. As in the embodiment of Figures 1 to 5, a part of the light rays is the
• Light emission characteristic which could be used for example for the illumination of a wall or laterally arranged below the LED spotlight object.
• the light emitted by the LEDs is used completely for illumination, with effective mixing of the light again taking place.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)
• Led Device Packages (AREA)
• Planar Illumination Modules (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (4)

Family Cites Families (3)

• 2010
  • 2010-08-13 DE DE102010039306A patent/DE102010039306A1/de not_active Withdrawn
• 2011
  • 2011-08-11 CN CN2011800335283A patent/CN102985751A/zh active Pending
  • 2011-08-11 WO PCT/EP2011/063837 patent/WO2012020082A1/de active Application Filing
  • 2011-08-11 EP EP11757786.6A patent/EP2603732B1/de active Active

Patent Citations (4)

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