EP0791782A2 - Leuchte - Google Patents

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Publication number
EP0791782A2
EP0791782A2 EP97200419A EP97200419A EP0791782A2 EP 0791782 A2 EP0791782 A2 EP 0791782A2 EP 97200419 A EP97200419 A EP 97200419A EP 97200419 A EP97200419 A EP 97200419A EP 0791782 A2 EP0791782 A2 EP 0791782A2
Authority
EP
European Patent Office
Prior art keywords
housing
lamp
light emission
support
emission window
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.)
Withdrawn
Application number
EP97200419A
Other languages
English (en)
French (fr)
Other versions
EP0791782A3 (de
Inventor
Evert Jan Fiechter
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
Philips Electronics NV
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 Koninklijke Philips Electronics NV, Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Priority to EP97200419A priority Critical patent/EP0791782A3/de
Publication of EP0791782A2 publication Critical patent/EP0791782A2/de
Publication of EP0791782A3 publication Critical patent/EP0791782A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • 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
    • F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/0075—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources
    • F21V19/0095—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of U-shaped tubular light sources, e.g. compact fluorescent tubes
    • 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
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/37—U-shaped

Definitions

  • the invention relates to a luminaire provided with:
  • Such a luminaire is known from DE-GM-91 12 691.
  • the support in the known luminaire is mounted opposite the light emission window and is a metal bracket which grips around the lamp.
  • the light generated by an accommodated lamp may easily be dazzling when the luminaire is mounted to a ceiling and may give an unpleasant reflection on picture screens.
  • Another disadvantage is that the luminaire thus mounted leaves the ceiling comparatively dark, so that the light emission window has a much higher brightness than the ceiling.
  • a further disadvantage is that the support intercepts light.
  • this object is achieved in that a louver with several parallel lamellae directed transversely to the light emission window is present in the light emission window, the housing has a light window opposite the light emission window, while a lamella of the louver carries the support.
  • the louver renders it impossible to look into an accommodated lamp in directions transverse to the lamellae at wide angles to the normal light emission window.
  • the louver will screen off angles of more than 65°.
  • Light may be radiated through the light window towards the ceiling to which the luminaire is fastened. A lower brightness contrast between the light emission window and the ceiling is obtained thereby, as well as an indirect illumination of the relevant space.
  • the light window may be closed with a light-transmitting, possibly light-scattering or light-deflecting, for example prismatic plate.
  • the support achieves that the accommodated lamp occupies a defined position relative to the reflecting means, so that a predetermined light distribution in and through the light emission window is obtained. Without a support, the lamp could assume an oblique position relative to the light emission window under the influence of its own weight.
  • the support is present at the side of the lamp facing away from the light window.
  • the support may be overlapped wholly or partly by the lamella carrying the support, especially if the lamella has a substantially triangular shape in cross-section of which the base lies inside the housing and is connected to the support. In that case the support will intercept no or substantially no light which would otherwise leave the light emission window. Any light which is still intercepted, however, will cause hardly any irregularities in the illumination of the area covered in view of the comparatively great distance to that area and the intermixing with light which takes place owing to the very nature of the louver.
  • the support may accordingly also be used in a luminaire which has a louver with flat slats by way of lamellae. The support may then be clamped or snapped onto a slat, for example with a furcate portion of this support.
  • the support need not grip around the lamp, because the support is underneath the lamp in the operational position of the luminaire.
  • the lamp-supporting surface of the support may be plane. It is favorable, however, when the supporting surface has sloping end portions. These may lie laterally of a mounted lamp and center the lamp in a direction parallel to the lamella.
  • the support may be made from synthetic resin, for example thermoplastic synthetic resin, for example PVC, polymethyl methacrylate, polyester, etc., and may be transparent.
  • the louver is usually made from metal, such as aluminum, but may alternatively be made from synthetic resin, which is possibly painted or metallized.
  • the luminaire may be designed for a compact fluorescent lamp, such as a lamp having at least two straight tube portions in which a low-pressure mercury discharge can be generated.
  • the luminaire of Fig. 1 is provided with a housing 1 having a light emission window 2.
  • a lampholder 3 is arranged in the housing for accommodating a tubular, single-ended electric lamp l in the housing along the light emission window, in the Figure a compact fluorescent lamp with two parallel tubular portions which consumes a power of 40 W during operation and has a total length of approximately 57 cm (see also Fig. 2).
  • Reflecting means 4 are present in the housing, i.e. two reflectors for directing light towards the light emission window 2.
  • a support 5 is present in the housing for supporting a lamp to be accommodated in the lampholder 3 in a point at a distance from this lampholder.
  • a louver 10 (see also Fig. 2) comprising several parallel lamellae 11 directed transversely to the light emission window is present in this light emission window 2.
  • the housing (Fig. 1) has a light window 12 opposite the light emission window 2 and closed by means of a transparent plate 20 in the Figure, for example made of polymethyl methacrylate.
  • a lamella 11' of the louver 10 carries the support 5.
  • the support 5 has a plane supporting surface 13 for the lamp l .
  • the supporting surface 13 has sloping end portions 14.
  • the lamellae 11, 11' are substantially triangular in cross-section, with their bases inside the housing 1. It is visible in Fig. 2 that the support 5 supports the lamp l adjacent the free end portion l" thereof, remote from its lamp cap l' , which is held in the lampholder 3 (Fig. 1).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP97200419A 1996-02-22 1997-02-14 Leuchte Withdrawn EP0791782A3 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97200419A EP0791782A3 (de) 1996-02-22 1997-02-14 Leuchte

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP96200459 1996-02-22
EP96200459 1996-02-22
EP97200419A EP0791782A3 (de) 1996-02-22 1997-02-14 Leuchte

Publications (2)

Publication Number Publication Date
EP0791782A2 true EP0791782A2 (de) 1997-08-27
EP0791782A3 EP0791782A3 (de) 1998-05-20

Family

ID=26142531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97200419A Withdrawn EP0791782A3 (de) 1996-02-22 1997-02-14 Leuchte

Country Status (1)

Country Link
EP (1) EP0791782A3 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9112691U1 (de) 1991-10-11 1991-12-05 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Leuchte

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343080C2 (de) * 1983-11-29 1986-06-19 Brökelmann, Jaeger & Busse GmbH & Co, 5760 Arnsberg Stützhalter für einseitig gesockelte Leuchtstofflampen
DE9210345U1 (de) * 1991-12-12 1992-10-15 Herbert Waldmann GmbH & Co, 7730 Villingen-Schwenningen Modular-Stableuchte
DE4202768C2 (de) * 1992-01-31 1994-04-14 Trilux Lenze Gmbh & Co Kg Leuchte
DE4413070A1 (de) * 1994-04-15 1995-10-19 Thorn Licht Gmbh Arbeitsplatzleuchte

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9112691U1 (de) 1991-10-11 1991-12-05 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Leuchte

Also Published As

Publication number Publication date
EP0791782A3 (de) 1998-05-20

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