EP0699865A1 - Luminaire - Google Patents

Luminaire Download PDF

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Publication number
EP0699865A1
EP0699865A1 EP95109324A EP95109324A EP0699865A1 EP 0699865 A1 EP0699865 A1 EP 0699865A1 EP 95109324 A EP95109324 A EP 95109324A EP 95109324 A EP95109324 A EP 95109324A EP 0699865 A1 EP0699865 A1 EP 0699865A1
Authority
EP
European Patent Office
Prior art keywords
reflector
insert
axis
luminaire according
lamp
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
Application number
EP95109324A
Other languages
German (de)
English (en)
Other versions
EP0699865B1 (fr
Inventor
Harald Dr. Hofmann
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.)
Erco Leuchten GmbH
Original Assignee
Erco Leuchten 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
Application filed by Erco Leuchten GmbH filed Critical Erco Leuchten GmbH
Publication of EP0699865A1 publication Critical patent/EP0699865A1/fr
Application granted granted Critical
Publication of EP0699865B1 publication Critical patent/EP0699865B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F21V13/12—Combinations of only three kinds of elements
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/06—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using crossed laminae or strips, e.g. grid-shaped louvers; using lattices or honeycombs

Definitions

  • the invention relates to a lamp, such as a recessed ceiling lamp or the like, according to the preamble of claim 1.
  • a lamp such as a recessed ceiling lamp or the like.
  • Such a lamp is described in DE 36 33 440 A1.
  • a similar lamp is the subject of DE 38 26 676 C2.
  • the lamp according to DE 36 33 440 A1 a recessed ceiling lamp, has a lower main reflector forming the light exit surface.
  • the light exit surface and the parallel cuts arranged thereon are square or - as in the subject of DE 38 26 676 C2 - circular.
  • the reflector axis forms the normal passing through the center of gravity of the light exit surface.
  • the inner reflector surface of the main reflector - like the inner reflector surface of the auxiliary reflector representing a central reflector insert - is conical in the broadest sense, in particular parabolically curved.
  • a light entry surface is provided for a rod-shaped light source arranged there adjacent.
  • the square light entry surface including the rod-shaped light source are jointly bridged by the convex reflector inner surface of an elliptical mirror reflector.
  • the object is to be achieved to create a compact lamp for an essentially rod-shaped lamp in which, apart from reflection losses due to single reflections in the reflector system, practically no light losses occur and which, when the dimming conditions are met, occur in the longitudinal direction the lamp allows wide distribution.
  • the entire reflector system is relatively complex.
  • the recessed ceiling light known from DE 38 26 676 C2 has a main reflector which has a circular light exit surface and surrounds a reflector insert in the form of a rotationally symmetrical central body which is directed outwards towards the inner reflector surface of the main reflector and is arranged at the same circumferential angle from one another wearing.
  • the object of the invention is to create a luminaire which allows adaptation to different lighting requirements, in particular with regard to the luminance, with relatively simple means, and which - in addition with simple means - in the area of the shielding angle both a homogeneous and a specifically inhomogeneous luminance is made possible.
  • the reflector insert has a diffusely scattering matt surface, of which at least the vast majority of the surface is directly illuminated by the illuminant and is reproduced as a mirror image from the reflector inner surface at all viewing angles within the lamp shielding angle of the reflector.
  • the reflector insert has a completely diffusely scattering, ie matt, surface. This surface is directly illuminated by the illuminant.
  • the light exit surface presents itself to the viewer as a completely homogeneous image of the same luminance, especially since the actual image of the reflector insert visible from the front and its rear side represented by the reflector inner surface as a mirror image connect seamlessly to one another.
  • the invention enables the reflector insert to be manufactured with surfaces that are relatively easy to manufacture, namely with completely matt surfaces provided in order to achieve a homogeneous light impression.
  • the relatively complex mirrored reflecting surfaces are limited according to the invention to the reflector receiving the reflector insert.
  • Another advantage of the luminaire according to the invention is that differently designed reflector inserts can be assigned to a uniform basic type of reflector depending on the need determined by practice.
  • the reflector according to the invention therefore enables a wide range of applications.
  • a preferred embodiment of the invention consists in that the reflector insert forms at least one plate element, which is arranged in a plane extending through the reflector axis.
  • the reflector insert has a plurality of plate elements, the extension planes of which intersect at the same central angles.
  • a simple embodiment of this type according to the invention is a cross formed by two plate elements, in which the plate elements penetrate one another in the reflector axis.
  • the plate elements can be relatively thin-walled.
  • the reflector insert is a combination of at least one plate element with a rotationally or centrally symmetrical body, the central body, forms, whose axis of symmetry is identical to the reflector axis.
  • the reflector insert has a uniformly tinted surface.
  • the reflector insert can have a non-uniformly tinted surface.
  • the invention also allows the reflector insert to be colored black and / or white and / or in color.
  • tinted surface used to identify a technical situation should include both bright colors (eg blue, green, yellow and red) and achromatic colors (black, white and their mixtures, ie the colors of the gray series). With a uniform tinted surface, the reflector insert would be a total of black, white, gray or blue, for example.
  • a white surface of the reflector insert can be used to produce a homogeneous white light-emitting surface, which brightens the surroundings.
  • a diffusely scattering matt surface it should generally be added that this is to be understood as a surface that is able to completely (matt) diffuse all light falling on it. So, regardless of whether they are achromatic (white, black, gray) or colored (e.g. blue, green, yellow, red), such surfaces should always be surfaces that look like Lambertian surfaces, and so do so emit that their luminance is the same in all directions according to Lambert's law (cf. e.g. p. 457 from "ABC DER OPTIK” by Mütze, 1972 publisher Werner Dausien, Hanau / Main; p. 27 from "LIGHTING TECHNOLOGY: BASICS” by BAER et al., 1990 VEB Verlagtechnik, Berlin).
  • each luminaire is designated by the reference number 10, regardless of its individual configuration.
  • the luminaires 10 are recessed ceiling luminaires, the respective light exit surface 11 of which is flush with the ceiling level E.
  • Each luminaire 10 has a reflector 12, the cavity of which is denoted by H and the reflector inner surface 13 is mirror-coated or is made of highly reflective material.
  • the inner reflector surface 13 according to FIGS. 1 and 2 is curved along a parabola.
  • the reflector 12 represents a rotationally symmetrical body. In the case of FIGS. 1 and 2, the axis of rotation is also the reflector axis y.
  • the inner reflector surface 13 surrounds a reflector insert 14, which consists of two plate elements 15 which penetrate each other in the reflector axis y to form the same central angle z, in the present case right angle.
  • the outer end faces of the relatively thin-walled plate elements 15 facing the inner reflector surface 13 are adapted to the parabolic shape of the inner reflector surface 13 and connect as closely as possible to it.
  • the plate elements 15 of the reflector insert 14 have a diffusely scattering matt surface L in the manner of a Lambertian surface.
  • the reflector 12 At a parallel distance from the light exit surface 11, the reflector 12 also has a circular light entry surface 16.
  • a luminous means 17 Arranged above the light entry surface 16 is a luminous means 17 which, in the example shown, consists of fluorescent tube lamps 19 which are held and contacted on one side in a base 18.
  • a curved cover surface 20, indicated only by dashed lines, is expediently provided above the light entry surface 16, the inner surface 21 of which is e.g. matt white or metallic matt glossy.
  • the function of the lamp according to FIGS. 1 and 2 is as follows:
  • the parabolically shaped inner reflector surface 13 with the focal point F symbolized by a small circle must be positioned so that no point of the illuminant 17 is reflected from the light exit surface 11 above the angle ⁇ .
  • the observer first sees the front surface of a plate element illuminated by the illuminant 17 15 and, immediately following it seamlessly, the back of the same plate element 15, but as a mirror image generated by the reflector inner surface 13.
  • the viewer is offered a light exit surface 11 which is homogeneous with regard to their luminance.
  • the luminance can accordingly be controlled over a wide range, which is particularly important for compliance of luminance limits in connection with screen workplaces is significant.
  • the lamp 10 according to FIGS. 3 and 4 differs from the lamp according to FIGS. 1 and 2 practically only in that the reflector 12 is shaped like a truncated cone with its inner reflector surface 13.
  • the function of the lamp 10 according to FIGS. 3 and 4 is the following:
  • the angle of inclination ⁇ of the frustoconical reflector inner surface 13 must be chosen so that the light from the most unfavorable lamp point F (here instead of a focal point) is not reflected at any angle ⁇ 1.
  • ⁇ 3> ⁇ 2> ⁇ 1 applies.
  • each angle is ⁇ > than the lamp shielding angle ⁇ , only the completely diffusely reflecting reflector insert 14 is reflected within the lamp shielding angle ⁇ under all viewing angles, so that practically the same lighting effect occurs overall. as described in connection with the lamp 10 according to FIGS. 1 and 2.
  • the simplest form of a reflector insert 14 is shown, which consists only of a relatively thin flat plate element 15.
  • a plurality of plate elements 15 are provided which penetrate one another to form the same central angles z in the reflector axis y.
  • FIGS. 8-11 and 8a-11a finally show how plate elements 15 can be combined with a rotationally or centrally symmetrical body, the central body 22.
  • the axis of symmetry of the central body 22 is identical to the reflector axis y.
  • FIGS. 8-11 As can be seen from the individual representations of FIGS. 8-11 and the associated views according to FIGS. 8a-11a, several plate elements 15 extend from the outer surface MA of the respective central body 22.
  • each central body 22 likewise forms a completely diffuse radiating matt surface L.
  • the central body 22 according to Figures 8, 8a; 9, 9a and 10, 10a are hollow straight circular cylinders, while the straight hollow cylinder of FIGS. 11 and 11a has the cross section of an equilateral polygon, here a hexagon.
  • each central body 22 which is not reflected by the inner reflector surface 13, can be reserved for special functions, possibly also for the light transmission.
  • the predominant surface portion of the respective reflector insert 14 represents a surface L illuminated by the illuminant 17, which is reflected in the reflector inner surface 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
EP95109324A 1994-09-01 1995-06-16 Luminaire Expired - Lifetime EP0699865B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4431136 1994-09-01
DE4431136A DE4431136A1 (de) 1994-09-01 1994-09-01 Leuchte, wie Deckeneinbauleuchte od. dgl.

Publications (2)

Publication Number Publication Date
EP0699865A1 true EP0699865A1 (fr) 1996-03-06
EP0699865B1 EP0699865B1 (fr) 1998-05-13

Family

ID=6527164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95109324A Expired - Lifetime EP0699865B1 (fr) 1994-09-01 1995-06-16 Luminaire

Country Status (3)

Country Link
EP (1) EP0699865B1 (fr)
DE (2) DE4431136A1 (fr)
ES (1) ES2118476T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631483A1 (de) * 1996-08-03 1998-02-05 Thorn Licht Gmbh Im Umriß rechteckige oder quadratische Deckeneinbauleuchte

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005004868A1 (de) 2005-02-02 2006-08-03 Engel, Hartmut S. Einbauleuchte

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR801784A (fr) * 1935-02-11 1936-08-17 Perfectionnement aux dispositifs d'éclairage
GB2013323A (en) * 1978-01-28 1979-08-08 Plessey Co Ltd Traffic signal lamp
DE3633440A1 (de) 1986-10-01 1988-04-07 Bartenbach Christian Leuchte
DE3826676C2 (fr) 1987-08-13 1991-11-07 Wila Leuchten Gmbh, 5860 Iserlohn, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR801784A (fr) * 1935-02-11 1936-08-17 Perfectionnement aux dispositifs d'éclairage
GB2013323A (en) * 1978-01-28 1979-08-08 Plessey Co Ltd Traffic signal lamp
DE3633440A1 (de) 1986-10-01 1988-04-07 Bartenbach Christian Leuchte
DE3826676C2 (fr) 1987-08-13 1991-11-07 Wila Leuchten Gmbh, 5860 Iserlohn, De

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BAER U.A.: "Beleuchtungstechnik: Grundlagen", 1990, VEB VERLAG TECHNIK, VERLIN
MUETZE: "ABC DER OPTIK", 1972, VERLAG WERNER DAUSIEN, HANAU/MAIN, pages: 457

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631483A1 (de) * 1996-08-03 1998-02-05 Thorn Licht Gmbh Im Umriß rechteckige oder quadratische Deckeneinbauleuchte

Also Published As

Publication number Publication date
DE59502157D1 (de) 1998-06-18
ES2118476T3 (es) 1998-09-16
EP0699865B1 (fr) 1998-05-13
DE4431136A1 (de) 1996-03-07

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