EP0045901B1 - Langgestreckte Arbeitsplatzleuchte - Google Patents

Langgestreckte Arbeitsplatzleuchte Download PDF

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Publication number
EP0045901B1
EP0045901B1 EP81105981A EP81105981A EP0045901B1 EP 0045901 B1 EP0045901 B1 EP 0045901B1 EP 81105981 A EP81105981 A EP 81105981A EP 81105981 A EP81105981 A EP 81105981A EP 0045901 B1 EP0045901 B1 EP 0045901B1
Authority
EP
European Patent Office
Prior art keywords
light
transverse
work
angle
lamellae
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.)
Expired
Application number
EP81105981A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0045901A1 (de
Inventor
Horst Dipl.-Ing. Riehl
Joachim Dipl.-Ing. Leibig
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT81105981T priority Critical patent/ATE4346T1/de
Publication of EP0045901A1 publication Critical patent/EP0045901A1/de
Application granted granted Critical
Publication of EP0045901B1 publication Critical patent/EP0045901B1/de
Expired 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
    • 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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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

Definitions

  • the invention relates to an elongated workplace lamp according to the preamble of claim 1.
  • Such a lamp and its assignment to a work table is known from US-A-3 389 246: it is arranged along a longitudinal edge of the rectangular work table, above and opposite the person working on this table. Direct glare is avoided by using a conventional grid with vertical transverse slats. However, a considerable proportion of light strikes the working area of the table top at such an angle that it is reflected from there into the eye of the person working at the table; as a result, at least the contrast of the visual task is significantly reduced, and with a correspondingly high luminance even reflex glare is caused, which in any case leads to impaired visual performance.
  • the invention is therefore based on the object of avoiding such an impairment in an arrangement of the lamp and table according to the preamble of the main claim.
  • the invention ensures that all light rays striking the table and coming directly from the lamp have a minimum inclination to the vertical determined by the overlap; This can be dimensioned such that no direct light is reflected into the eye of the person sitting at the table from a sufficiently large work surface of the table or a visual task lying thereon.
  • the workstation lamp is to be used in a room in which VDU workstations are located, adequate shielding must also be ensured: Above a shielding angle s the lamp must appear dark, i. that is, the luminance is equal to or less than 200 candelas per square meter. Depending on the arrangement of the screen workstations to each other and to the lights, this shielding angle is 75 ° or 65 °.
  • the distance between two adjacent transverse lamellae is chosen to be so large that the angle of the boundary beam measured through the upper and lower edges of the adjacent transverse lamellae is equal to or smaller than the required shielding angle.
  • cross-blades with a bent profile, the lower part of which has an angle of inclination with respect to the horizontal which is equal to or smaller than the required shielding angle.
  • shielding angle 65 °
  • shapes and dimensions for the bent transverse lamellas can result, which are unfavorable in terms of effort and efficiency. It is more expedient in this case to insert an auxiliary lamella in the middle between the upper parts of two adjacent, bent transverse lamellae, which is non-reflective on both sides, in particular black, and whose size and angle of inclination is equal to the size and angle of inclination of the upper part of a transverse lamella.
  • the workstation lamp is mirror-inverted in the same way as the central transverse symmetry plane.
  • the work area therefore receives light from both outer sections of the workplace lamp, the end areas of the table from the middle section. In this way not only a better use of the lamp power but also an increase in the contrast in the work area is achieved.
  • bent cross blades with or without intermediate blades In the middle section of the luminaire, the undersides of the bent cross blades are not reflective or black, and the relationships discussed above also apply.
  • the shielding angle has already been mentioned as the highest limit for the angle of inclination of the transverse slats or the lower parts of bent transverse slats if the workplace lights are to be used in rooms with VDU workstations.
  • a value is preferably chosen for this angle of inclination which lies between the limits specified in claim 9.
  • the workplace lamp has, according to a further development of the invention, an upper light exit opening through which the direct radiation of the upper half of the lamp together with the reflected light mentioned can exit upwards and thus serves the general lighting of the room. Under certain circumstances, additional ceiling lights can even be dispensed with.
  • FIG. 1a and 1b show a rectangular desk 1 and above it the workstation lamp 2 with the length L shown in FIG. 3, indicated here only by dashed lines.
  • the lamp extends approximately over the entire length of the desk and runs parallel to its longitudinal edge and its table surface at a vertical distance H from the table surface or about 1.85 m above the floor, so that practically no view of the upper light outlet opening (220 in Fig.3) is possible.
  • FIG. 1b From Fig. 1b it can be seen that the lamp 2 is arranged above the rear quarter of the table top. If a normal grid were used, the light coming from the luminaire would be redirected directly into the eye of the person sitting at the table through a reflective work surface in the work area e and cause a reduction in contrast or reflected glare (see dash-dotted beam path). This is prevented by the invention with the aid of the grid 20 with inclined transverse slats 201, 202.
  • This grid 20 is indicated schematically in FIG. 1a and has four sections a to d, sections c and d being mirror images of the other half with sections a and b.
  • the undersides of the transverse slats in sections b and c are black, those of the transverse slats in sections a and d are mirrored; the length of the two middle sections is denoted by 1.
  • the ray paths shown in dashed lines in FIG. 1a show that the working field e with the width E is illuminated by the two outer sections a and d of the lamp, while the outer areas g and f of the table are illuminated by the inner sections b and c.
  • the light rays strike the table top at an angle that lies between the angles ⁇ and y of the two boundary rays through the upper and lower edges of adjacent transverse slats.
  • the work area is thus primarily illuminated by light from the side, so that light reflected from the work area e cannot strike the eye of the person working at the table.
  • this template is symmetrical to the transverse symmetry plane 200; if these optimal conditions are also to apply when the work template is shifted by a distance s, then 1 must also be chosen to be larger by the same amount - if necessary in both directions.
  • the latter is again equal to or less than the maximum permissible shielding angle s, so that no light can be reflected to the left from the lower part 2022 'of the right lamella, which has a larger angle than s.
  • the distance A between two adjacent transverse lamellae 202 ' is dimensioned so large that the angle ⁇ of the boundary beam passing through the lower edge of the right transverse lamella is also equal to or smaller than the shielding angle s: in this way, a shielding angle which is sufficient in many applications with VDU workstations guarantee of 75 °.
  • an auxiliary lamella 203 ' can be placed in the middle between the upper parts 2021' of two adjacent transverse lamellae 202 '. are provided which are not reflective (black) at the top and bottom and whose size and angle of inclination are equal to the size and angle of inclination of the upper parts 2021 'of the transverse lamella 202':
  • This auxiliary lamella also keeps scattered light which is reflected several times between adjacent transverse lamellae out of the shielding area .
  • the undersides of the cross blades in the central section 1 of the grid of the workstation lamp are non-reflective (black).
  • the inclined cross slats reflect part of the light upwards with their tops.
  • the lamp 2 shown in cross-section in FIG. 3 also has a light exit opening 220 on the upper side;
  • the grid 20 described is arranged in the lower light exit opening 210.
  • Two asymmetrical channel mirrors 23 and associated fluorescent lamps 221, 222 are arranged in the housing 21 of the workplace lamp.
  • the rear mirror parts 232 have such a main radiation direction ⁇ and curvature that they appear dark from a normal sitting position, but nevertheless direct the majority of the light into the front region of the work table (FIG. 1b); the front mirror parts 231, on the other hand, direct the light into the central and rear areas of the table.
  • the mirror parts 231, 232 only extend to the level of the central plane of the fluorescent lamps and there are at a distance from these lamps through which light reflected by the grid 20 can exit.
  • the light emitted by the upper half of the lamps is also emitted unhindered against the ceiling of the room.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Steroid Compounds (AREA)
EP81105981A 1980-08-08 1981-07-29 Langgestreckte Arbeitsplatzleuchte Expired EP0045901B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81105981T ATE4346T1 (de) 1980-08-08 1981-07-29 Langgestreckte arbeitsplatzleuchte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3030080A DE3030080C2 (de) 1980-08-08 1980-08-08 Langgestreckte Arbeitsplatzleuchte
DE3030080 1980-08-08

Publications (2)

Publication Number Publication Date
EP0045901A1 EP0045901A1 (de) 1982-02-17
EP0045901B1 true EP0045901B1 (de) 1983-07-27

Family

ID=6109209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105981A Expired EP0045901B1 (de) 1980-08-08 1981-07-29 Langgestreckte Arbeitsplatzleuchte

Country Status (5)

Country Link
EP (1) EP0045901B1 (fi)
AT (1) ATE4346T1 (fi)
DE (1) DE3030080C2 (fi)
FI (1) FI66482C (fi)
ZA (1) ZA815470B (fi)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT376784B (de) * 1982-01-18 1984-12-27 Zumtobel Ag Arbeitsplatzleuchte
DE3412162C1 (de) * 1984-03-31 1985-08-29 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg Langgestreckte Leuchte
DE3711366A1 (de) * 1987-04-04 1988-10-27 Pohlschroeder & Co Kg Rasterleuchte fuer arbeitsplaetze
DE9101774U1 (de) * 1991-02-15 1991-05-08 Siemens AG, 8000 München Arbeitsplatzleuchte
DE4111577A1 (de) * 1991-04-10 1992-10-15 Trilux Lenze Gmbh & Co Kg Arbeitsplatzleuchte
DE29608354U1 (de) * 1996-05-08 1996-06-27 Trilux-Lenze Gmbh + Co Kg, 59759 Arnsberg Arbeitsplatzleuchte
EP3859200A1 (de) * 2020-01-31 2021-08-04 Bartenbach Holding GmbH Beleuchtungsvorrichtung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1251703B (fi) *
GB892536A (en) * 1958-08-08 1962-03-28 A E I Lamp And Lighting Compan Improvements relating to lighting fittings
US3389246A (en) * 1966-01-17 1968-06-18 Sylvan R. Shemitz Illuminated wall partition divider
US3390263A (en) * 1966-08-22 1968-06-25 Willis L. Lipscomb Columnar cellular louver light control unit
DE1984108U (de) * 1968-01-13 1968-04-25 Guenther Gubela Raster zur anordnung vor beleuchtungsquellen.
CH473354A (de) * 1968-11-12 1969-05-31 Sulzer Ernst Blendschutzgehäuse für Beleuchtungen
DE1916885A1 (de) * 1969-04-02 1970-11-26 Brandenburg Co Nova Lux Strahlerleuchte mit asymmetrischer Lichtstaerkeverteilung
DE2630556A1 (de) * 1976-07-07 1978-01-19 Shemitz Sylvan R Beleuchtungskoerper
CA1114797A (en) * 1978-10-10 1981-12-22 Esquire, Inc. Side lighting system for illuminating a task

Also Published As

Publication number Publication date
ATE4346T1 (de) 1983-08-15
DE3030080A1 (de) 1982-02-25
DE3030080C2 (de) 1984-10-18
FI66482B (fi) 1984-06-29
FI66482C (fi) 1984-10-10
EP0045901A1 (de) 1982-02-17
ZA815470B (en) 1982-07-28
FI812306L (fi) 1982-02-09

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