EP0496921B1 - Lampe - Google Patents

Lampe Download PDF

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Publication number
EP0496921B1
EP0496921B1 EP91101298A EP91101298A EP0496921B1 EP 0496921 B1 EP0496921 B1 EP 0496921B1 EP 91101298 A EP91101298 A EP 91101298A EP 91101298 A EP91101298 A EP 91101298A EP 0496921 B1 EP0496921 B1 EP 0496921B1
Authority
EP
European Patent Office
Prior art keywords
cover plate
prisms
fluorescent lamp
prism
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.)
Expired - Lifetime
Application number
EP91101298A
Other languages
German (de)
English (en)
Other versions
EP0496921A1 (fr
Inventor
Eckart Dr. Perizonius
Michael Dipl.-Ing. Rotter
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 DE59105176T priority Critical patent/DE59105176D1/de
Priority to EP91101298A priority patent/EP0496921B1/fr
Priority to ES91101298T priority patent/ES2070349T3/es
Priority to AT91101298T priority patent/ATE121178T1/de
Publication of EP0496921A1 publication Critical patent/EP0496921A1/fr
Application granted granted Critical
Publication of EP0496921B1 publication Critical patent/EP0496921B1/fr
Priority to GR950400755T priority patent/GR3015772T3/el
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
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/402—Lighting for industrial, commercial, recreational or military use for working places
    • 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 a lamp according to the preamble of patent claim 1.
  • Luminaires in particular linear luminaires, such as those used in great variety for the interior lighting of rooms, for example workrooms, are often subject to greater requirements with regard to glare-free lighting. This is expressed in that the glare of the lamp must be practically zero within an angular range between 60 ° and 90 °. This condition can easily be met if the ratio of the height of the axis of the fluorescent lamp above the light exit opening of the housing to the width of the housing opening, taking into account the lamp diameter, exceeds a predetermined value.
  • a ceiling light for a railroad car is known from US-A-2,525,315. Because of this application, special lighting conditions apply. In particular, the light should be emitted against the ceiling of the car and also towards the seats.
  • the known solution teaches to use a lenticular lamp cover glass, the inward surface of which, facing the light source, has longitudinally aligned prismatic elevations both in the lateral edge regions and in the vicinity of the lamp center axis.
  • This design of the luminaire cover glass is intended to scatter light emitted by the light source in the direction of these prismatic surfaces, on the one hand to brighten the ceiling in the luminaire environment by lateral light emission via the edge areas and on the other hand to reduce the luminance in the luminaire center.
  • the invention has for its object, for a lamp of low height of the type described above, in which the housing opening representing the light exit opening is closed with a cover plate made of transparent material, a further solution for a glare-free design of the lamp in the angular range between 60 ° and 90 ° specify the no components with special light-conducting properties within the housing are required.
  • the invention is based on the finding that the light-guiding elements required for the desired glare-freeness of the lamp can be integrated into the cover plate in a simple and advantageous manner in that the cover plate is provided with prismatic profiling edge strips.
  • the prismatic profile consists of a large number of mutually parallel prisms with small opening angles in the limits of 25 ° to 60 °, with which the desired glare-free light in the range between 60 ° and 90 ° is practically without loss of light, ie without significant deterioration the luminaire operating efficiency, can be brought about in an excellent manner.
  • the lamp according to the features of claim 1 is developed in an extremely advantageous manner by the features of claim 4.
  • the additional prismatic profiling of the center area of the cover plate from a few mutually parallel prisms with a large opening angle within the limits of 75 ° to 125 ° enables a deep indentation in the angular range of 0 ° to be achieved, which means that the CRF values (Contrast Rendering Factor) are considerable to improve.
  • the single-lamp linear luminaire according to FIG. 1, shown schematically in cross section, has a housing and mirror symmetry with respect to a plane of symmetry S.
  • the housing G which has a relatively low height, has a housing opening GO on the underside, which is closed with a slightly curved cover plate A made of transparent material.
  • the fluorescent lamp LL with its axis Ax is arranged above the cover plate A in the plane of symmetry S. It has the diameter D and is arranged with its axis Ax at a height H above the cover plate A.
  • the width B of the housing opening GO and therefore also the width of the cover plate A is so great in relation to the height H that the shielding angle ⁇ , which is determined by the tangent beam sT to the fluorescent lamp LL through the lower left edge point of the housing opening GO to the horizontal, is the minimum required for many applications of such lamps Falls below 30 °.
  • the illumination angle ⁇ between the perpendicular and the tangent beam sT is accordingly too large and therefore causes undesirable glare effects from the lamp light passing through the housing opening GO and the cover plate A. As can still be seen in FIG.
  • a channel-shaped reflector arrangement RR with concavely curved side parts is provided within the housing G, also in a mirror-image arrangement to the axis of symmetry S, which increases the light efficiency of the lamp and the light emitting on the sides of the fluorescent lamp LL in the direction reflected on the housing opening GO.
  • the shielding angle ⁇ by the relationship is determined, that is to say, particularly in the case of a low construction with a low height H of the fluorescent lamp LL above the cover plate A, enforcing values which are smaller than the glare limitation to be required permits.
  • the shielding angle ⁇ can also advantageously be increased in the dimensions of the lamp shown in FIG. 1 in that in the lamp shown in FIG. 2, corresponding to the lamp of FIG. 1, the cover plate A1 on both sides on the Has an edge area 1 or 5 with a prismatic profile on the inside.
  • the prismatic profiling of the edge regions 1 and 5 has a larger number of directly adjacent prisms, which extend parallel to the axis Ax of the fluorescent lamp LL and have a small opening angle in the limits from 25 ° to 60 °.
  • the prisms are dimensioned such that their sides facing away from the fluorescent lamp LL are essentially totally reflective for the lamp light, while their sides facing the fluorescent lamp LL are essentially light-refracting.
  • the cover plate A2 can also have a central area 3 with prismatic profile in addition to the edge areas 1 and 5 with prismatic profiling.
  • the prismatic profiling of the central region 3 consists of only a few prisms with large opening angles in the range from 75 ° to 125 °.
  • the prism structure is dimensioned such that the prism sides are essentially refractive for the lamp light.
  • the beam sc striking this central region 3 is now refracted from the center to the side, which means that the luminance of the lamp light emerging downward through the cover plate A2 is reduced in the region of the plane of symmetry S. This results in better CRF values for the room illuminated by the luminaire.
  • Fig. 4 shows first once the cover plate A2, which can either be flat or a slight circular curvature with a radius of curvature R which, in relation to the width B of the housing opening GO, is equal to or greater than 2.8.
  • the cover plate A2 has an equally large intermediate area 2 and 4 between the edge area 1 and the central area 3 on the one hand and the edge area 5 and the central area 3 on the other hand, which has no prismatic profile and allows the lamp light to pass through to the outside essentially uninterrupted.
  • the edge areas 1 and 5 have the same widths l1 and l5.
  • the width l3 of the central area 3 corresponds at least approximately to the widths l1 and l5 of the edge areas 1 and 5.
  • the equally large intermediate areas 2 and 4 with the widths l2 and l4 are approximately half the widths l1 and l5 of the edge areas 1 or l5 and the width l3 of the central region 3. If the central region 3, which has a prismatic profile, is eliminated, the width l0 then results for the intermediate region between the edge regions 1 and 5 which is thereby enlarged.
  • the widths l1 and l5 of the edge regions 1 and 5 and the width l3 of the central region 3 generally have a size based on the width B in the range 0.17 to 0.33.
  • the widths l2 and l4 of the intermediate areas 2 and 4 are then obtained.
  • the prisms with a given thickness hO of the cover plate and a predetermined same height h of the prisms of the edge areas 1 and 5 and the central area 3 are dimensioned in a certain way.
  • edge areas 1 and 5 applies here that the size of the opening angle of the prisms across the width l1 to l5 of an edge area 1 or 5, starting with the Remove the largest opening angle ⁇ 1 + ⁇ 2 prism at the outermost edge of cover plate A1 or A2 with 12 ° / cm. 5 and 6 in two partial sections of the edge region 1, the two side surfaces of a prism that unite in the free prism edge have the inclination angles ⁇ 1 and ⁇ 2 of different sizes with the plumb L fell from this prism edge.
  • FIG. 5 shows a partial section of the edge area 1 in the vicinity of the edge of the cover plate A1 or A2, while FIG. 6 shows a corresponding partial section of the edge area 1 on the side of the central area of the cover plate.
  • a prism is specifically designated, namely in FIG. 5 the middle prism P4 and in FIG. 6 the prism P3 at the inner edge of the edge region 1.
  • angles of inclination of the prism sides ⁇ 1 and ⁇ 2 of a prism which together form the opening angle of the Prisms result, are chosen so that the angle of inclination ⁇ 1 of the side of the prisms facing away from the fluorescent lamp LL decreases by 10 ° / cm and the angle of inclination ⁇ 2 of the sides of the prisms facing the fluorescent lamp LL decrease by 2 ° / cm.
  • the opening angles ⁇ 1 + ⁇ 2 of the prisms of an edge region 1 or 5 then decrease from 32 ° to 54 °, starting from the outer edge of this edge region and towards the inner edge.
  • the central region 3 has only three prisms P0, P1 and P2, of which the central prism P0 and the adjoining right prism P1 are shown in FIG. 7.
  • the center prism P0 which is an equilateral prism and whose solder fell from the free prism edge lies in the plane of symmetry S, has an opening angle ⁇ 0 of 90 °.
  • the angles of inclination ⁇ 1 and ⁇ 2 of the sides of the prism P1 are correspondingly different in size, the angle of inclination ⁇ 1 of the side of the prism P1 and P2 facing the fluorescent lamp LL having the larger value.
  • FIG. 8 the cover plate A2 is shown again and in this case in sections a and b of the right edge area 5 and in section c of the central area 3 prisms P4 or P3 or P1 are marked, which are shown in FIGS Are shown in detail.
  • FIG. 9 illustrates the beam path of the lamp light through the prism P4 or the cover plate A2.
  • FIG. 10 illustrates the prism P3 highlighted in section b in the illustration according to FIG. 8.
  • the three rays of the lamp light are designated here as sb1, sb2 and sb3.
  • FIGS. 9 and 10 illustrate, the sides of the prisms P4 and P3 which face the fluorescent lamp LL are refractive for the lamp light impinging on them, while their sides facing away from the fluorescent lamp LL are totally reflective for the lamp light.
  • both sides of the prism i.e. both the side facing the fluorescent lamp LL and the side facing away from the fluorescent lamp LL, are refractive for the incident lamp light with the effect that the radiation incident here is deflected away from the plane of symmetry S after passing through the prism.
  • the effect of this deflection is evident in the comparison of the light distribution curves LVK1 and LVK2 according to FIGS. 12 and 13, respectively.
  • the light distribution curve LVK2 receives a strong indentation in the central area by 0 ° due to the central area 3 provided with a prismatic profile.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Lasers (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Claims (10)

  1. Appareil d'éclairage comportant un boîtier (G) en forme de cuvette, qui possède au moins une lampe luminescente (LL) disposée de telle sorte que son axe (Ax) est situé dans un plan symétrique (S) de l'appareil d'éclairage et qui loge en lui la douille de la lampe avec un système de fixation, y compris d'autres composants électriques ainsi qu'un dispositif formant réflecteur (RR), qui réfléchit la lumière de la lampe en direction d'une ouverture (GO) du boîtier, qui forme la surface de sortie de la lumière de l'appareil d'éclairage, et une plaque de fermeture en matériau transparent (A ou A1,A2), qui porte une partie profilée et est disposée de manière à recouvrir l'ouverture (GO) du boîtier, à une distance prédéterminée (H) de l'axe (Ax) de la lampe luminescente (LL) et est disposée symétriquement par rapport au plan de symétrie (S) et est réalisée avec une forme légèrement cintrée, et comporte des deux côtés, sur le côté (côté intérieur) tourné vers la lampe luminescente (LL), dans le prolongement de l'axe (Ax) de la lampe luminescente (LL), une zone marginale (1,5) possédant un profil prismatique qui est parallèle à l'axe (Ax) de la lampe luminescente (LL), caractérisé par le fait que pour accroître la valeur de l'angle de protection (α), déterminée par la distance (H) entre la lampe luminescente (LL) et la plaque de revêtement (A1,A2), par la largeur (B) de la surface de sortie de la lumière de l'appareil d'éclairage et par le diamètre (D) de la lampe luminescente (LL), le profil prismatique de chaque zone marginale (1,5) de la plaque de revêtement (A1,A2) est constitué par un nombre assez élevé de prismes (P3,P4), qui sont disposés côte-à-côte sans intervalle intercalaire et possèdent une même hauteur (h) et de petits angles d'ouverture (γ1 + γ2) dans les limites de 25°-60°, que les deux surfaces latérales d'un prisme (P3,P4), qui se rejoignent au niveau de l'arête libre du prisme, forment avec la verticale (L) passant par cette arête du prisme, des angles d'inclinaison (γ1, γ2) différents, que ces angles d'inclinaison (γ1,γ2) sont choisis de telle sorte que les côtés des prismes (P3,P4), qui sont tournés à l'opposé de la lampe luminescente (LL), sont essentiellement à réflexion totale pour la lumière de la lampe, mais que les côtés des prismes (P3,P4), qui sont tournés vers la lampe luminescente (LL), agissent d'une manière essentiellement réfringente pour la lumière.
  2. Appareil d'éclairage suivant la revendication 1, caractérisé par le fait que
    les largeurs (l₁,l₅) des deux zones marginales (1,5), qui possèdent un profil prismatique, de la plaque de revêtement (A1,A2), sont égales, et
    que le rapport de la largeur d'une zone marginale (1,5) à la largeur (B) de la plaque de revêtement (A1,A2) se situe dans les limites comprises entre 0,17 et 0,33.
  3. Appareil d'éclairage suivant la revendication 1 ou 2, caractérisé par le fait que la valeur de l'angle d'ouverture (γ1 + γ2) des prismes (P3,P4) diminue à raison de 12°/cm sur la largeur (l₁,l₅) d'une zone marginale (1,5), en commençant par le prisme qui possède l'angle d'ouverture (γ1 + γ2) maximum, sur le bord le plus extérieur de la plaque de revêtement (A1,A2), et ce de telle sorte
    que l'angle d'inclinaison (γ2) des prismes des côtés, tournés vers la lampe luminescente (LL), diminue à raison de 2°/cm et que l'angle d'inclinaison (γ) des côtés, tourné à l'opposé de la lampe luminescente (LL), des prismes diminue à raison de 10°/cm.
  4. Appareil d'éclairage suivant l'une des revendications précédentes, caractérisé par le fait que la plaque de revêtement (A2) possède en outre, sur le côté intérieur, dans le prolongement de l'axe (Ax) de la lampe luminescente (LL), une zone médiane (3) possédant un profil prismatique qui est sensiblement parallèle à l'axe (Ax) de la lampe luminescente (LL), que son profil prismatique, qui est symétrique par rapport à l'axe de symétrie (S), est constitué par un petit nombre de prismes (P0,P1,P2) qui sont disposés côte-à-côte sans intervalles intercalaires, possèdent une même hauteur (h) et un grand angle d'ouverture dans les limites de 75° à 125°, et dont les deux faces latérales, qui se rejoignent au niveau de l'arête libre du prisme, ont un effet essentiellement réfringent pour la lumière de la lampe.
  5. Appareil d'éclairage suivant la revendication 4, caractérisé par le fait que le rapport de la largeur (l₃) d'une zone centrale (3) possédant un profil prismatique à la largeur (B) de la plaque de revêtement (A2) se situe dans des limites comprises entre 0,17 et 0,33.
  6. Appareil d'éclairage suivant la revendication 4 ou 5, caractérisé par le fait qu'une zone centrale (3), qui possède un profil prismatique, de la plaque de revêtement (A2) est constituée par un nombre impair de prismes (P0, P1, P2), et que l'arête libre d'un prisme central équilatéral (P0) faisant partie de ces prismes est située dans le plan de symétrie (S) et que d'autres prismes (P1,P2), qui se raccordent des deux côtés au dispositif symétrique par rapport au plan de symétrie (S), sont agencés avec des côtés inégaux,
    que leurs surfaces latérales, tournées vers le prisme central (P0), font, avec la verticale (L) qui passe par l'arête libre de ce prisme, un angle d'inclinaison (δ1) qui est supérieur à l'angle d'inclinaison (δ2) de leurs surfaces latérales tournées à l'opposé du prisme central (P0), et
    que les angles d'ouverture (δ1 + δ2) des autres prismes (P1, P2) sont supérieurs à l'angle d'ouverture (δ0) du prisme central (P0).
  7. Appareil d'éclairage suivant l'une des revendications 1 à 6, caractérisé par le fait que la zone centrale (3), qui possède un profil prismatique, de la plaque de recouvrement (A2) est formée des trois prismes (P0,P1,P2).
  8. Appareil d'éclairage suivant l'une des revendications précédentes, caractérisé par le fait que la hauteur (h) des prismes (PO,P1,P2,P3,P4) se situe dans les limites comprises entre 1 et 12 mm.
  9. Appareil d'éclairage suivant l'une des revendications précédentes, caractérisé par le fait que le rapport de la largeur (B) de la plaque de revêtement (A1,A2) à la distance (H) de l'angle (Ax) de la lampe luminescente (LL) par rapport à la plaque de revêtement (A1,A2) se situe dans des limites 1,5-3,0.
  10. Appareil d'éclairage suivant l'une des revendications précédentes, caractérisé par le fait que le léger cintrage de la plaque de revêtement (A1,A2), dans le sens de sa largeur (B), possède une courbure circulaire (R) ≧ 2,8 rapporté à la largeur B.
EP91101298A 1991-01-31 1991-01-31 Lampe Expired - Lifetime EP0496921B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE59105176T DE59105176D1 (de) 1991-01-31 1991-01-31 Leuchte.
EP91101298A EP0496921B1 (fr) 1991-01-31 1991-01-31 Lampe
ES91101298T ES2070349T3 (es) 1991-01-31 1991-01-31 Lampara.
AT91101298T ATE121178T1 (de) 1991-01-31 1991-01-31 Leuchte.
GR950400755T GR3015772T3 (en) 1991-01-31 1995-04-13 Lamp.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91101298A EP0496921B1 (fr) 1991-01-31 1991-01-31 Lampe

Publications (2)

Publication Number Publication Date
EP0496921A1 EP0496921A1 (fr) 1992-08-05
EP0496921B1 true EP0496921B1 (fr) 1995-04-12

Family

ID=8206352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101298A Expired - Lifetime EP0496921B1 (fr) 1991-01-31 1991-01-31 Lampe

Country Status (5)

Country Link
EP (1) EP0496921B1 (fr)
AT (1) ATE121178T1 (fr)
DE (1) DE59105176D1 (fr)
ES (1) ES2070349T3 (fr)
GR (1) GR3015772T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19833299C1 (de) * 1998-07-24 2000-03-02 Hohe Gmbh & Co Kg Beleuchtungseinrichtung für ein Kraftfahrzeug
EP1130312B1 (fr) 2000-03-03 2017-05-31 Siteco Beleuchtungstechnik GmbH Luminaire comprenant une surface d'émission de la lumière avec un centre de symétrie, notamment de forme circulaire
EP1132678B1 (fr) * 2000-03-10 2009-08-26 Siteco Beleuchtungstechnik GmbH Luminaire avec guide de lumière creux symétrique situé au centre et irradiation symétrique, en particulier luminaire circulaire
DE102010014289B4 (de) * 2010-04-08 2014-03-27 Trilux Gmbh & Co. Kg Leuchtmodul und Leuchte mit Leuchtmodul
DE102012102987A1 (de) * 2012-04-05 2013-10-10 Siteco Beleuchtungstechnik Gmbh Prismenplatte mit variierenden Flankenwinkeln
DE102012102986A1 (de) * 2012-04-05 2013-10-10 Siteco Beleuchtungstechnik Gmbh Prismenplatte mit variierenden Flankenwinkeln
DE202016002197U1 (de) * 2016-04-01 2016-06-06 Osram Gmbh Direktstrahlende LED-Leuchte mit Entblendungsoptik

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525315A (en) * 1945-10-20 1950-10-10 Safety Car Heating & Lighting Lighting fixture
US4450509A (en) * 1982-08-17 1984-05-22 Thorn Emi Plc Lanterns for area lighting
US4937715A (en) * 1989-01-26 1990-06-26 Kirschner Medical Corporation Lamp system for operating theatres and the like
DE3911140A1 (de) * 1989-04-06 1990-10-11 Wila Leuchten Gmbh Wand- oder deckenleuchte

Also Published As

Publication number Publication date
ES2070349T3 (es) 1995-06-01
ATE121178T1 (de) 1995-04-15
DE59105176D1 (de) 1995-05-18
EP0496921A1 (fr) 1992-08-05
GR3015772T3 (en) 1995-07-31

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