MXPA01007141A

MXPA01007141A - Luminaire without lamellae

Info

Publication number: MXPA01007141A
Application number: MXPA/A/2001/007141A
Authority: MX
Inventors: Adrianus Josephus Holten Petrus; Christian Pichelin Nicolas
Original assignee: Koninklijke Philips Electronics Nv
Priority date: 1999-11-12
Filing date: 2001-07-12
Publication date: 2002-06-05

Abstract

The luminaire (1) has two oppositely positioned rows comprising a plurality of reflectors (3), possibly made of separate sectors (31). The individual reflectors (3) are separated by edge portions (17) which are positioned transversely toa longitudinal axis (5) of the luminaire (1) and transversely to a light emission window (9). The edge portions (17) are spaced apart by a distance D, measured transversely to the longitudinal axis (5), of between 1 and 2 times the diameter (lamp of an associated lamp (21). The luminaire (1) can be free of lamellae thanks to these separate reflectors (3) and the relatively small interspacing D of the edge portions. As a result of this, the luminaire (1) is relatively easy and cheap to manufacture, and a lamp (21) can be easily inserted and/or removed.

Description

Luminaire without laminitas The invention relates to a luminaire consisting of: Concave reflectors placed on each side of the longitudinal axis and around said longitudinal axis and each with an edge defining a window of light emission; The edge portions are, at least partially, transverse to the longitudinal axis and to the window of light emission; and Connection means for accommodating a lamp to be operated, whose lamp has a diameter f ^ mp.

For example, said luminaire is known from US 5,758,954. The known luminaire is formed from a plurality of reflectors and the edge portions placed transversely to the longitudinal axis are constructed as laminites extending between mutually opposite edges, so that the light emission window is subdivided into compartments ( separated). The reflectors concentrate the light generated by a lamp accommodated in a beam, but also provide a projection. This results in the lamp not being able to be observed from a direction perpendicular to the longitudinal axis, in so-called CO planes, at an angle to the plane Q parallel to the light emission window that is smaller than a chosen angle of cut β . The angle ß of cut is normally 30 ° when the position of the plane Q is horizontal in the illumination of spaces in which the frame screens are placed to avoid a reflection of the lamp in said screens. This is the function of the iaminites to ensure that the lamp can not be observed at angles smaller than the ß cut angle of 30 ° or from directions in the extension of the longitudinal axis, with reference to the C90 planes in lighting engineering. They intercept the light emitted at smaller angles and reflect it, deflect and / or scatter. The reflectors and laminites have an identical function in the C planes between CO and C90. As there is no material that reflects incident light at 100%, but partial absorption always occurs, the laminates not only cause a projection, to make the space illuminated by the luminaire comfortable for the user, but also cause the loss of light. A disadvantage of the known luminaire is that the laminates make the luminaire comparatively expensive. The luminaire is partially detachable for insertion or removal of the lamp, which makes the replacement of a lamp provided in the luminaire comparatively difficult. The fact that the luminaire has to be partially removable requires a construction of the luminaire, which has the disadvantage that the assembly of the luminaire is comparatively difficult. An object of the invention is to provide a luminaire of the type described in the opening paragraph, in which the disadvantages are counteracted while maintaining the same quality in the shape of the light beam. According to the invention, this objective is achieved since the luminaire of the type described in the initial paragraph is characterized in that the edge portions which are opposite the longitudinal axis and placed in mutual opposition are separated by an interspace D which is measured transverse to the longitudinal axis for the purpose of inserting the lamp that will operate in the luminaire. The above measure achieves that the luminaire does not have laminites, although it was found that the projection against the visibility of the lamp in the planes CO-C75, for angles smaller than the angle ß of 30 ° to a plane Q parallel to the window of A light emission, and the beam-shaped qualities are substantially the same as with the known luminaire. Interspace D is greater than ffamP for the purpose of easily mounting the relevant lamp with a reliable diameter in the luminaire or to remove it from the luminaire without the need to dismantle the luminaire, for example, in case the edge portions have to be removed. Another advantage is that the light output of the luminaire is increased because the luminaire does not have edge portions at a distance D of at least fiamp, so the light losses due to the absorption of light by the portions of fc edge occur to a lesser degree. Another advantage is the low cost of the luminaire, as it requires less material for the luminaire. Another advantage is that the luminaire no longer needs to be partially removable, which simplifies the assembly of the luminaire. The known lamp has the disadvantage that it can cause a glare effect which the observer perceives as unpleasant, since a continuous reflected image of the lamp in the reflector is given parallel to the longitudinal axis and resembles the lamp. To counteract this effect, an incorporation of the luminaire is characterized in that each reflector is curved concavely with respect to an axis that is transversal to ^ t the light emission window. When viewed from observation directions in which the angle is greater than the cutoff angle ß of 30 °, the luminaire does not cause a glare effect to the observer with the reflected image of the lamp. In a favorable embodiment, the luminaire is characterized in that it is provided with projection means for projecting an observer from a directly emitted light that originates from a lamp placed in the luminaire. Thanks to this measurement, the light beam and lumen output remain at least substantially the same as those of the known luminaire, but the direct glare at angles less than the cutting angle β, which is also determined in part by the ^^ Choice of projection means, does not occur in the CO-C90 planes. For example, the projection means may be composed of a window reflector which is placed parallel to the longitudinal axis and is located between the connection means and the light emission window 5. The window reflector can have a shape that is somewhat curved around the lamp to make this reflector rigid. A lamp provided in the luminaire can be changed relatively easily because only one window reflector is removed from the luminaire according to the invention, instead of a plurality of laminates. ^^ that had to be removed for this purpose in the known luminaire. In an alternative embodiment, in which the luminaire is provided with a lamp, the luminaire is characterized in that the projection means consist of a coating on one side of the lamp that faces the window of light emission. The coating can be internal and / or external in a portion of the circumference of the lamp and can be chosen so that the light is transmitted and partially reflected. If he coating is provided on the side of the lamp that faces the window of light emission on the circumference of the lamp to cover 140 °, no glare will be ^^ visible at angles smaller than the cutoff angle ß of 60 ° in the CO-C90 planes. The degree of light transmission of the coating can be easily adjusted by the choice of material and / or the thickness of the coating layer. This is possible from a simple way to control the brightness of the side of the lamp that faces towards the window of light emission. In an alternative embodiment, the luminaire is characterized in that the interspace D has a maximum value of 2 * fiamp. If the interspace D is less than 2'fbmp, the risk of glare remains small compared to the observation of the planes different from the CO, since the cutting angle ß is maintained at 30 in these planes.

^^ The risk of glare can also be kept comparatively small in the observation of the C75-C90 planes in combination with the projecting means. In a favorable incorporation, the luminaire is characterized in that the interspersed D decreases in size in a direction from the window of light emission to the connection means, said decrease in size has a decreasing direction that encloses an angle of at least 65 ° with the window of light emission, preferepda at least 75 °. As a result of this, it is easier to change a ^^ lamp accommodated in the luminaire. In another embodiment, the luminaire is characterized in that each reflector consists of at least two sectors, each concavely curved about an individual axis to the respective sector and which is substantially transverse to the window of light emission. Each of the sectors of the luminaire has a reflecting surface. The sectors are characterized by the crossed sections of the respective CO planes and C90 through the reflecting surface that defines, at least substantially, the same concave curve, the respective tangent line in the light emission window encloses a ^ angle? with the light emission window, in the plane CO an angle? ^ in the plane C90 an angle? 2, so that > ? > 2, while? - =? > 2 transversal to the C90 plane, with? decreasing from? -, to? 2. A CO plane extends through a point of the the surface furthest from the reflector that is removed from the longitudinal axis and the edge portions have ends through which the C90 plane extends. For example, the concave curve can be defined by a parabola or a (double) groove since a focus of the light beam can be achieved with comparative ease. Each reflector is constructed of various sectors that can adjoin one another at an angle. This has the advantage that the reflectors can be narrow in the direction of the longitudinal axis and comparatively deep in a direction transverse to the longitudinal axis. The edge pordons have a projecting effect in the planes C0-C75 which is substantially the same as that of the laminates of the conodda luminaire. In yet another embodiment, the luminaire is characterized in that the luminaire is constructed of a plurality of reflectors. These reflectors can be used as separate modules, for which it is possible to achieve a flexible arrangement of the luminaire. The choice of number and shape of the modules is possible in a simple way to adapt the length of the luminaire to the length and shape of the lamp. In another embodiment, in which the respective light emission window is in a plane, the luminaire is characterized in that the plurality of reflectors is arranged in a drcular form, while the plurality of the light emission windows of the respective Reflectors form a light emission window. A luminaire obtained in this way is suitable for accommodating a low pressure gas discharge lamp. It is also possible to vary the optical properties, such as the focus of the beam and the degree of diffuse reflection, of the luminaire along its longitudinal axis and adapt them to the wishes of the client through the simultaneous use of different types of reflectors in the luminapa. The luminaire according to the invention can be designed, for example, to accommodate a straight tubular electric lamp or a fluorescent lamp such as the low pressure mercury vapor discharge lamp. The luminaire can also be designed for an elongated lamp consisting, for example, of two straight tubular elements interconnected side by side. The luminaire may or may not have a box in which the reflector fits. The two mutually opposite reflectors can together form an integral part. For example, the fabrication of the reflector can be achieved by deforming a metal plate or by means of the injection mold of, for example, synthetic resin. To obtain a suitable surface quality of the reflector, the reflector can be covered, or metallized for example with aluminum, or it can be painted with, for example, titanium oxide. A luminaire is known from EP-B-0 619 006, which is constructed of a plurality of reflectors. Two mutually opposite reflectors together with two edge pordons, ie laminites, form a closed octagonal contour. A disadvantage of the conodda luminaire is that the laminates make the luminaire comparatively expensive. Another disadvantage is that the assembly of the luminaire is comparatively cumbersome and that the lamp provided in the luminaire is difficult to replace. A further disadvantage is the loss of light caused by the laminites.

The ipcorporadons of the luminaire according to the invention are shown in the drawings, in which Figure 1 shows part of a luminaire in perspective view, seen from a C60 plane at an angle of 75 °; Figure 2 shows part of the luminaire of figure 1 seen in an oblique plane in the direction of light emission from the light emission window and originates from the lamp; Figure 3A is a cross-sectional view of the luminaire of Figure 2 taken on line l-1; and Figure 3B is an elevation of the portion of the luminaire of Figure 3A seen in li. The luminaire 1 of figure 1 consists of reflectors 3 defining a longitudinal axis 5 and which limit a light emission window 9 by its edges 7. The reflectors 3 are concavely curved about the longitudinal axis 5. The luminaire 1 It forms an integral of two opposite mutually transverse units and each one forms a plurality of reflectors 3 which are placed next to each other in the direction of the longitudinal axis 5. The reflectors 3 located next to each other have their limits in the portions of edge 17 which are transverse to the light emission window 9 and at least pardally transverse to the longitudinal axis 5. The luminaire 1 is also provided with connection means 19 for accommodating an electric lamp (lamp not shown in the figure). 1, see figure 3A) with a diameter fkmp of, for example, 16 mm. Each pair of ^^ Border paradons 17 located transversely - opposed to each other has its pordons edge spaced apart from one another by an interspace D of, for example, 20 mm measured in a direction transverse to the longitudinal axis 5. A lamp 21 (not shown in FIG. 1) suitable for the luminaire 1 can be swung with spacing between the opposite transverse edge portions 17. Figure 2 shows the same luminaire 1 in a perspective view, view from a direction of the light emitting window 9, whose luminaire 1 is provided with a tubular lamp 21. The luminaire 1 has a characteristic caterpillar appearance.

The lamp 21 is provided with a covering 29a that transmits light partially and which is present on a side 33 of the lamp 21 that faces the light emission window 9. The reflectors 3 are subdivided into sectors 31. Each spacer 31 is concavely curved about an individual axis 25 of the respective sector 31. Figure 3A shows a transverse plane of a section ll through the luminaire 1 in the incorporation of figure 2. The lamp 21, with a reliable diameter of 16 mm , it is held in connection means 19 (not shown in Figure 2). The lamp 21 is provided with the coating 29a which is present on the side 33 of the lamp 21 which gives the light emission window 9 to cover an angle of 140 °. By way of ^^ alternately, the lining 29a can be replaced by a window reflector 29b (shown with a broken line) to serve as a projection means, which reflector is placed between the reflectors 3 and between the lamp 21 and the light emission window 9, and whose reflector is curved around the lamp 21. In figure 3A, the edge 7 of the reflectors 3 together with the lining 29a defines a larger project angle β with plane Q at whose angle the lamp 21 can no longer be seen in the CO plane showing the luminaire 1 that is seen transverse. In Figure 3A, the project angle ß is ^^ of 60"The transverse section of the CO plane through the reflecting surface 31a substantially describes a parabola whose tangent line 31b in the light emitting window 9 includes an angle yi with the light emission window 9. Figure 3B shows the planes CO, C45, C60 and C75 with respect to the luminaire 1. It is apparent from Figure 3B that the entire edge 7, but in particular the edge pordons 17 of the reflectors 3, are of importance to project to a observer against the light that originates directly from the lamp 21 and emit it towards the luminaire 1. The edge pordopes 17 which give the longitudinal axis 5 and are located opposite one another are separated by the distance D measured transverse to the longitudinal axis 5. D measures 20 mm in Figure 3B. The reflectors 3 are subdivided into seals 31. Each seder 31 is concavely curved about the axis 25 which is individual to sector 31, as shown in Figure 3B for two 3V senators and 31"that are curved around the respectable axes 25 'and 25".

Claims

CHAPTER CLAIMING Having described the invention, it is considered as a novelty and, therefore, the content is claimed in the following:

CLAIMS 1. A luminaire consisting of: Concave reflectors (3) placed on each side of the longitudinal axis (5) and around said longitudinal axis (5) and each with an edge (7) that defines a window of emission of light (9); Edge pordons (1) pardally transverse to the longitudinal axis (5) and transverse to the light emission window (9); and Connecting means (19) to accommodate a lamp (21) to be operated, the lamp (21) has a diameter fiam, which is characterized in that the edge pordons (17) give the longitudinal axis (5) and are placed in mutual opposition and separated by an interspaced D measured transversely to the longitudinal axis (5) for the purpose of inserting the lamp (21) to be operated on the luminaire (1).
2. A luminaire according to claim 1, characterized in that each reflector (3) is concavely curved with respect to an axis (25) that is transverse to the window of light emission (9).
3. A luminaire according to claim 1 or 2, which is encapsulated in that it is provided with projecting means (29).
4. A luminaire according to claim 3, characterized in that said projection means (29) consist of a window reflector (29) extending parallel to the longitudinal axis (5) and located between the connection means ( 19) and the light emission window (9).
5. A luminaire according to claim 4, whose luminaire (1) is propordona with a lamp (21), which caraderiza in which the projection means (29) consist of a coating (29) of the side (33) of the lamp (21) that gives fairy the light emission window (9).
6. A luminaire according to claim 5, which is characterized in that the coating (29) transmits light pardalmente.
7. A luminaire according to claims 1, 2 or 3, which is characterized in that the interspace D has a maximum value of 2 * fl8mp.
8. A luminaire according to claim 7, which is characterized in that the interspaced D decreases in size in a direction from the light emission window (9) towards the connecting means (19), said decrease in size has a decreasing direction that encloses an angle of at least 65 ° with the window of light emission (9), with a preference of at least 75 °.
9. A luminaire according to claims 1, 2 or 3, which is caraderized in that each reflector (3) consists of at least two senders (31), each concavely curved about an axis (25) that is individual to the senator respective (31) and which is at least substantially transverse to the light emission window (9).
10. A luminaire according to claim 9, wherein the senator (31) has a reflective surface (31a), while the edge portions (17) have resposable ends (17a), and the plane CO extends through a point (7a) of the surface farthest from the reflector (31a) ) which is removed from the longitudinal axis (5), and a plane C90 extending through the end (17a), characterized in that the transverse sections of CO and C90 through the reflective surface (31a) define less substantially the same concave curve of the respective tangent line (31b) in the light emission window (9), is dedr, an angle y- \ in CO and an angle? 2 in C90, so that 90 ° = y-&> ? 2, y? 1 = y =? 2 transversal to the planes CO, C90, with? decreasing in value from? i to? 2.
11. A luminaire according to claims 1, 2 or 3, which is characterized in that the luminaire is constructed of a plurality of reflectors (3).
12. A luminaire according to claim 11, wherein the respected light emission window (9) is in a plane, which is encapsulated in that the plurality of reflectors (3) are placed in a drcular shape, while the plurality of the light emitting windows (9) of the respective reflectors (3) form a light emission window (9).