EP1880139B1 - Led-beleuchtungsmodul - Google Patents

Led-beleuchtungsmodul Download PDF

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Publication number
EP1880139B1
EP1880139B1 EP06722835A EP06722835A EP1880139B1 EP 1880139 B1 EP1880139 B1 EP 1880139B1 EP 06722835 A EP06722835 A EP 06722835A EP 06722835 A EP06722835 A EP 06722835A EP 1880139 B1 EP1880139 B1 EP 1880139B1
Authority
EP
European Patent Office
Prior art keywords
light
led
illumination module
led illumination
lens
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.)
Active
Application number
EP06722835A
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German (de)
English (en)
French (fr)
Other versions
EP1880139A1 (de
Inventor
Rainer Opolka
Andreas Timinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zweibrueder Optoelectronics GmbH
Original Assignee
Zweibrueder Optoelectronics 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
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Application filed by Zweibrueder Optoelectronics GmbH filed Critical Zweibrueder Optoelectronics GmbH
Publication of EP1880139A1 publication Critical patent/EP1880139A1/de
Application granted granted Critical
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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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • F21V14/025—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources in portable lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F21L4/02—Electric lighting devices with self-contained electric batteries or cells characterised by the provision of two or more light sources
    • F21L4/022—Pocket lamps
    • F21L4/027—Pocket lamps the light sources being a LED
    • 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
    • F21V5/006—Refractors for light sources applied to portable lighting devices
    • 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
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • 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 invention relates to an LED lighting module with an LED and a rotationally symmetrical one-piece light transparent front optics, which has an inner collecting lens part and an outer reflector part and a rear blind hole-like opening.
  • Such LED lighting modules are used for example in flashlights.
  • the flashlights known from the prior art which are equipped with a light bulb, have z. T. a conically widening to the end face lamp head, in the interior of which a mostly parabolic trained concave mirror is arranged in the focal point of the incandescent lamp or its filament is arranged.
  • a concave mirror surface can easily become dirty or the mirror surface can fade by corrosion effects, so that the reflection of the light is weaker.
  • flashlights have come on the market, which are equipped with a light-emitting diode.
  • Light-emitting diodes consume significantly less power than incandescent lamps and can usually be operated with a lower operating voltage, so that small battery bodies (mignon cells) are sufficient as a power source.
  • flashlights can be made in a smaller design, so that they are conveniently carried along as a key fob or the like.
  • light-emitting diodes prove by design to be particularly shock and impact insensitive.
  • light emitting diodes have an extremely long life, so that eliminates a lamp replacement, which is often necessary in the past. Even with LEDs as a light source, the given light emission should be optimally utilized.
  • the possible use of a reflector which can be found partly in lamps, has the disadvantages already mentioned. In addition, it is desirable to be able to save this component as well.
  • a converging lens is disposed at the light exit surface, which radiates substantially a parallel light beam in a position in which the location of the light emissions at the focal point of this condenser lens is arranged.
  • a longitudinally displaceable lamp head has been proposed, which allows the position of the converging lens to vary the LED.
  • the Lichtbündel characterisitik can be changed within certain limits.
  • this design can only be used in such light-emitting diodes whose radiation is already bundled forward. If the light emitting diodes also radiate relevant portions of the light to the side, that is at a high angle to its axis, this light is not used.
  • Today's high-performance light-emitting diodes are z. T. built so that the radiation exits at a large angle to the axis. For such light-emitting diode optical attachments are useful.
  • lens bodies which are formed prism-shaped or beam-like solid with a flat or slightly convexly curved end face. At the back of these lens body have a recess into which protrudes the LED glass body.
  • the annular surface of the LED base is in this case flat on the corresponding annular surface of the lens body, wherein the light emitting point of the LED is arranged stationary so that the light emitted in the region of the optical axis to the aperture light is to be refracted via the collimator effect to a parallel light beam.
  • the light emitted at a larger angle to the optical axis is totally reflected when the so-called critical angle is exceeded and deflected in accordance with the surface curvature and the resulting reflection angle.
  • the radiation characteristics of the lamp set for example from the US Pat. No. 6,478,453 B2 or US 6,547,423 B2 known intent optics is the radiation characteristics of the lamp set.
  • Another lens body is from the US 2,254,962 known.
  • the lens has an opening for receiving a light source.
  • a collecting lens part is arranged in the middle of the lens, which is surrounded by an elliptically shaped reflector.
  • the rotationally symmetrical one-piece light-transparent front optics has an inner collection lens part and an outer reflector part and a rear blind hole-like opening, which is bounded by a conical or in cross-section arcuate conical surface and a convexly curved base and which has a cladding diameter, one along the optical axis of the Front lens longitudinal axial displacement of the LED body in the opening allowed.
  • the longitudinal axial displacement of the entire, consisting of the LED glass body and the socket arrangement in the blind hole-like bore is possible, so that by a relative movement of the LED to the blind hole along the optical axis different radiation characteristics with different cone angles of the light beam are variably adjustable.
  • the smallest diameter of the conical opening is ⁇ 9 mm and the total height of the attachment optics is between 9 mm and 16 mm.
  • the total height of the attachment optics should be between 9 mm and 16 mm, which is possible by combining a collecting lens part with an outer reflector part.
  • the collecting lens part has a convexly curved base surface as a light entry surface and a front, likewise convexly curved light exit surface.
  • the reflector part which adjoins the outside immediately in the context of the one-piece optical attachment is essentially formed by the lateral surface of the blind-hole-like opening as the light entry surface, an outer shell-shaped lateral surface as the surface totally reflecting the light and a front conical light exit surface.
  • All light entrance and light exit surfaces break obliquely incident light beams such that the emitted light from the LED is radiated substantially completely, in particular more than 85% forward and by the longitudinal axial displacement of the entire LED a light cone change of a cone of light with a cone angle ⁇ 12 ° can be generated up to a cone angle ⁇ 20 °.
  • a light cone change of a cone of light with a cone angle ⁇ 12 ° can be generated up to a cone angle ⁇ 20 °.
  • In at least one relative LED position to the blind hole-like opening of the attachment optics is a inner light cone region over a cross-sectional area perpendicular to the optical axis homogeneously illuminable, preferably in such a way that at 2.5 m distance, a circle of 0.80 m in diameter is homogeneously illuminated.
  • this objective can be achieved either by a longitudinally displaceable attachment optics with permanently mounted LED or by a leksaxial displaceable LED with permanently mounted attachment optics or by combined displacement of the attachment optics and the LED.
  • the solution is selected such that the attachment optics is arranged in a longitudinal axis relative to a remaining lamp body, in which the LED is permanently installed, slidable lamp head. Possibly.
  • a longitudinal axial or helical guide can be provided.
  • the Kollimatoreigenschaft the converging lens can be combined with the reflector property of the outer intent optical part in such a way that converging as divergent light beams in certain positions of the light emitting diode to the optical attachment illuminate a homogeneous surface , in particular in 2.5 m distance in a diameter of 80 cm.
  • the light-refracting or totally reflecting surfaces can be calculated using a 2 D tailoring technique.
  • the angle of inclination, under which the light exit surface of the reflector part is arranged against a vertical to the optical axis between 35 ° and 40 °, preferably selected at 37 °.
  • the reflector part may according to a further embodiment of the invention have outer edge surface pieces which are arranged parallel to the optical axis of the attachment optics. This ensures that the formation of stray light in the edge area is prevented.
  • the reflector part may further comprise outer annular surface pieces, which are arranged around the opening and perpendicular to the optical axis and / or which are arranged outside and perpendicular to the optical axis.
  • the ratio of the diameter of the attachment optics to the height thereof is selected between 0.4 and 0.5 and preferably between 0.44 and 0.49.
  • the ratio of the thickness of the inner condenser lens to the height of the attachment optics is optimally between 0.6 and 0.65, preferably 0.614.
  • the ratio of the diameter of the inner collective lens part to the diameter of the optical attachment is between 0.5 and 0.55.
  • the inner collection lens part has a light exit surface whose radius of curvature is smaller than the radius of curvature of the light entry surface.
  • the collecting lens part according to the invention has an opening angle of at least 40 °, preferably 42 °.
  • the attachment optics is preferably made of plastic, in particular PMMA or glass.
  • the intent optics which acts as a lens body, has a rear blind-hole-like opening 11, which is bounded by a conical lateral surface 12 and a convexly curved base surface 13.
  • This base surface 13 is also the light entrance surface of an inner collecting lens part 14, which has a convexly curved light exit surface 15 on the front side.
  • the collecting lens part 14 is surrounded by a reflector part 16, which is essentially formed by the lateral surface 12 as a light entry surface and an outer shell-shaped lateral surface 17 as the total light reflecting surface and a front conical light exit surface 18.
  • the reflector portion 16 may still have wall portions 19 which are parallel to an optical axis, further edge portions 21, 22 which are perpendicular to the optical axis.
  • the total diameter of the in Fig. 5 shown attachment optics can be, for example, 20 mm, 25 mm or 36 mm, each with a height of 9 mm, 11 mm or 16 mm.
  • the opening 11 is where wide or the diameter of this opening is so large that an LED 23, the in Fig. 5 is indicated schematically, together with base along the optical axis (see double arrow 24) can be moved.
  • Different radiation characteristics result from the Fig. 1 to 4 , A relatively narrow bundling with a circular area of 0.8 m, which is homogeneously illuminated, for example, in 2.5 m, results in a position according to FIG Fig.
  • beam characteristic consists of a relatively tightly focused light cone with a small cone angle.
  • a lens was used in a relatively flat design.
  • lens differs from this by a greater height, in which the lateral surfaces 17 "forward and back" have been extended, so that a relatively deeper 'blind hole 11 and a further projection of the front surfaces 18 relative to the inner light exit surface 15 results.
  • the light-emitting diode 23 is shown in different positions for attachment optics 10, resulting in correspondingly different light characteristics.
  • the surfaces 12 can be spherical or aspherical and the surfaces 14 and 15 can be spherical or flat (and not aspherical as shown).
  • the front optic is preferably made of PMMA and can be used in particular in 12 V strangles as well as in flashlights.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Led Devices (AREA)
  • Led Device Packages (AREA)
  • Lenses (AREA)
EP06722835A 2005-05-12 2006-05-05 Led-beleuchtungsmodul Active EP1880139B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200520007500 DE202005007500U1 (de) 2005-05-12 2005-05-12 Taschenlampe
PCT/DE2006/000777 WO2006119735A1 (de) 2005-05-12 2006-05-05 Led-beleuchtungsmodul

Publications (2)

Publication Number Publication Date
EP1880139A1 EP1880139A1 (de) 2008-01-23
EP1880139B1 true EP1880139B1 (de) 2009-04-29

Family

ID=34802470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06722835A Active EP1880139B1 (de) 2005-05-12 2006-05-05 Led-beleuchtungsmodul

Country Status (8)

Country Link
EP (1) EP1880139B1 (xx)
CN (1) CN100549505C (xx)
AT (1) ATE430286T1 (xx)
DE (2) DE202005007500U1 (xx)
DK (1) DK1880139T3 (xx)
ES (1) ES2326389T3 (xx)
HK (1) HK1108730A1 (xx)
WO (1) WO2006119735A1 (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3165818B1 (de) 2015-11-06 2019-01-02 Siteco Beleuchtungstechnik GmbH Innen- oder aussenleuchte, insbesondere strassenleuchte, mit verlagerbarer freiformlinse

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3165818B1 (de) 2015-11-06 2019-01-02 Siteco Beleuchtungstechnik GmbH Innen- oder aussenleuchte, insbesondere strassenleuchte, mit verlagerbarer freiformlinse

Also Published As

Publication number Publication date
ATE430286T1 (de) 2009-05-15
DE502006003613D1 (de) 2009-06-10
EP1880139A1 (de) 2008-01-23
WO2006119735A1 (de) 2006-11-16
CN101018975A (zh) 2007-08-15
CN100549505C (zh) 2009-10-14
DK1880139T3 (da) 2009-08-17
HK1108730A1 (en) 2008-05-16
DE202005007500U1 (de) 2005-07-21
ES2326389T3 (es) 2009-10-08

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