EP1496308A2 - Interior Light with a refractive element - Google Patents

Abstract

The device has a light source (1) and an associated reflector (3) with a light outlet opening for a direct light component. The source is enclosed on both sides by a light deflecting device, especially a light deflecting body, extending between the light source and reflector with one side in the direct light radiation direction relative to the source. The device is transparent at least on a side facing the reflector with a light diffracting structure on this side that influences the path of the light from the source incident on the reflector.

Description

The present invention relates to a luminaire having a lamp, in particular an elongated lamp, and a reflector associated with the lamp having a light exit opening for emitting a direct light component. Such lights are used in particular for interior lighting. In the interior lighting there is a requirement that the glare of people who are in the lighted room should be largely avoided. Corresponding requirements are specified in relevant standards, for example DIN EN 12464-1 or E DIN 5035-7. In particular, in luminaires for VDU workstations there is a requirement that in certain C-planes above a shielding angle, which is typically in a range of 45 ° to 80 °, often in the range of 50 ° to 65 °, in particular 65 °, the luminance below a Value of 1000 cd / m ² , according to older standards or draft standards even below 500 cd / m ² or 200 cd / m ² must be. Conventionally, compliance with such conditions is achieved by inserting a grid in the light exit opening, which has fins or similar elements that limit the exit angle of the light geometrically. For avoiding glare, however, not only those light beams are relevant which run directly from the lamp through the grid without reflection. Rather, reflections on the grid or in the reflector of the lamp can lead to glare. The requirement to avoid even glare by reflection has led to partially complex lamellar constructions. Conventional grids whose elements are made of opaque materials also reduce the efficiency of the luminaire. Approaches for grids with translucent materials have not prevailed in practice.

Another approach to avoid glare is the principle of the secondary light. The Light of the lamp is not immediately in the case of corresponding lamps, but only after reflection delivered via a reflector. For this purpose, a distance from the lamp are usually Secondary reflector and a primary reflector required, which the lamp so far surrounds the light of the lamp is not directly from the light exit opening of the secondary reflector can exit at an angle greater than the shield angle. At different Secondary lights is also on the secondary reflector side facing The lamp provided a grid, which, similar to a grid in a direct-radiating Luminaire controlling the light emission from the lamp to the secondary reflector. such Constructions often lead to multiple reflections to the radiation of the Light through the light exit opening are required, which reduce the efficiency.

It is the object of the invention to provide an alternative luminaire construction provide, with which in particular the required for the interior lighting shield can be achieved.

According to the invention, this object is achieved by a luminaire, in particular an interior luminaire, with at least one light source, z. B. a lamp, in particular an elongated Lamp, and one of the light source associated with the reflector from the light source emitted light reflects and a light exit opening for emitting a direct light component characterized in that the lamp at least two, preferably at three sides by a light-directing device, in particular a light-directing body, is surrounded, at least on one side between the light source and the reflector extends and has a side which lies with respect to the light source on the side to which the delivery of the direct light component takes place, wherein the device at least one, in particular at all pointing to the reflector sides is translucent and to these translucent pages has a refractive structure, which the beam path of the light incident on the reflector from the light source.

Under a direct light component of a luminaire in this context is the light component To understand a lamp that without prior reflection on a room element on the surface to be illuminated is radiated, which does not preclude certain parts of the direct light component before the emission through the corresponding light exit opening in the Be reflected light.

According to a particular embodiment, the luminaire is designed so that in one or more C-planes, in particular in the C90 and the C180 plane, above a shielding angle to the vertical in a range of 45 ° to 80 °, preferably in a range of 50 ° to 65 ° and in particular at 65 °, the luminance is below a value of 1000 cd / m ² , where appropriate also below 500 cd / m ² or 200 cd / m ² , in particular in such a way that the luminaire meets the abovementioned standards or Standard draft complies. It can be provided in particular that in the area below the shielding angle, the luminance of the lamp is at least predominantly, preferably completely above 1000 cd / m ² .

According to the invention, the light directing device has a side which, with respect to the lamp in the direction of the radiation of the direct light component. Is the lamp inside arranged the reflector, it lies on the light exit opening facing side of the Lamp. If the lamp is wholly or partially outside the reflector, it lies on the side facing away from the reflector and the light exit opening side of the lamp. In both Cases this page is arranged so that the light of the lamp, which in the direction of the direct Light component is emitted, incident on this side of the light-directing device.

The light-directing device may be in the direction of emission of the direct light component lying side translucent, partially translucent or opaque. Especially can via this page according to an embodiment of the invention, a direct Part of light emitted while according to other embodiments on this page no light is emitted and the lamp overall similar to a secondary lamp acts. Also in this respect, hybrids are possible, such that light only is partially transmitted, so that the area of this page appears bright, but with a lower luminance than the remaining area of the light exit opening.

The light-directing device according to the invention need not necessarily exclusively consist of light-directing and / or translucent elements, but can also be a or have multiple elements and portions that do not have light directing properties have or are not translucent.

According to the invention it can be provided that the reflector the lamp at one or more Completely surrounds pages, i. the reflector covers the entire extent in this case the lamp off. In particular, it can be provided that the lamp is not beyond the light exit opening the reflector is located. It can also be provided that at one or more The reflector only partially surrounds the lamp, i. the reflector covers this side not the entire extension of the lamp. In particular, it can be provided that the Lamp is partially beyond the light exit opening of the reflector. Basically it is also possible that the lamp is arranged outside the reflector and the light-directing Device is arranged so that the emitted light of the lamp at least partially, but preferably is completely radiated onto the reflector. Such embodiments Especially come into consideration when the reflector is relatively flat should be.

In cases where the lamp is outside the reflector, it can be provided that the Body is not or only partially translucent arched or otherwise the lamp has concave bottom and a translucent element, in particular a translucent roof with a refractive structure, on one Side is placed so that the bottom and this element together form the body, in the interior of which the lamp is housed. In particular, it can be provided that the Element the shape of a flat roof, an outwardly or inwardly arched roof or a roof, which, in a cross section perpendicular to the lamp axis, the shape of a Has polygon, which may be concave or convex with respect to the lamp.

The invention may provide that the light-directing device, in particular a lichtlenkender Body surrounding lamp on two opposite sides, of which, however only one side is translucent, so that light is irradiated on this side of the reflector can be. The other, opposite side can be absorbent, preferably but be reflective, so that they the light incident on them to the opposite Side of the light-directing device reflects, so that the light output increases becomes. In this way, an asymmetric radiation characteristics of the lamp can be easily to reach. However, the invention can also provide that the two opposing Pages are translucent, so that on both sides of light on the lamp the reflector is irradiated, these two sides in particular also symmetrical be formed to each other, so that, in conjunction with a symmetrical reflector, a symmetrical Lichtabstrahlcharakteristik arises. Mixed forms are also included possible, such that an asymmetrical light-directing device, in particular a asymmetric light-directing body, combined with a symmetrical reflector or an asymmetrical reflector with a symmetrical light-directing device.

The invention may also provide that the light-directing device, in particular a lichtlenkender Body, symmetrical with respect to a plane which is the longitudinal axis of the lamp contains and cuts the light exit opening for the direct proportion of light. It can in particular be provided that this plane the light exit opening for the direct light component cuts at a right angle.

The lamp may in particular an elongated lamp with an elongated lamp be aligned in the direction of the longitudinal extent of the lamp, the lamp substantially parallel to the light exit surface, ie in particular not perpendicular to the Light exit surface runs.

The reflector can except the mentioned light exit opening more light exit openings have, in particular one or more light exit openings for delivering an indirect Light component.

A luminaire according to the invention can in particular be used as a direct and indirect luminaire be formed and one or more light exit surfaces for the exit of an indirect Have light. Such light exit surfaces can in the simplest case by a Hole, in particular be implemented by a hole in the reflector. An alternative Possibility to implement such a light exit surface, is that one the Reflector in the region of this light exit surface partially transparent, for example as Perforated sheet, laying out. The reflector can in the region of this light exit surface, e.g. also from a translucent material or a corresponding element, e.g. a sheet of translucent material inserted into an opening of the body be.

A light exit surface for an indirect light component can be arranged so that light the lamp directly, without being influenced by the light directing device, emerges from this light exit surface. It may be provided in particular that a Such light exit surface is located between two side walls of a light-directing body. However, it can also be provided that such a light exit surface arranged so is that light of the lamp, preferably all radiated through this light exit surface Light, must first pass through the light-directing device to this light exit surface to get. For example, such a light exit surface outside a light-directing body forming said light-directing device is arranged be. Thus, e.g. said reflector in areas laterally adjacent to such a light directing Body lie, have corresponding light exit surfaces.

The invention can provide that the light-directing device with respect to the lamp in the direction of emission of the direct light component lying floor, z. B. one of the light exit side facing floor, and has angled to this floor walls.

The bottom and / or the side walls can each be planar. Soil and / or However, sidewalls may also have different shapes, e.g. have a V-shape.

The floor may be flat or curved or even of several flat or curved Be composed of sections. In this case, the floor with respect to that side, which to the lamp has to be concave, so that it faces the lamp in its course back, or convex, so that it protrudes toward the lamp. For example The floor can consist of two flat sections, that of the lamp side facing an angle of 135 ° to 155 °, in particular 140 ° with each other and each with the side walls at an angle of 90 °. Instead For example, the bottom may also have a corresponding concave curvature or shape be formed of a polygon section with more than two sides.

It can also be provided that the floor consists of two flat sections, which enclose an angle of 85 ° to 150 ° on the side facing away from the lamp. at In this embodiment, the bottom protrudes toward the lamp, so that below the protruding Section on the lamp opposite side of the bottom of a recess is formed, in the advantageously electrical and / or mechanical lighting components, For example, the wiring or a ballast, can be accommodated.

The invention may provide that the light-directing device comprises a body which in the Cross section, in particular in a cross section perpendicular to a substantially parallel or slightly inclined to the light exit surface extending lamp axis, the shape of a truncated at the top, open at the top, or truncated at the top, at its base has an open triangle.

It can be provided that in a cross section, in particular in a cross section perpendicular to a substantially parallel or slightly inclined to the light exit surface extending Lamp axis, the line that connects the two end points of the soil, with a tangent to a side wall, preferably with the tangents to all side walls, the passing through one of the end points, including an angle of 65 ° to 80 °, in particular 70 °. For flat sidewalls, this angle corresponds to the angle between the line through the two endpoints and the relevant sidewall.

The invention may also provide that this angle is greater than 90 °, preferably 100 ° to 160 °, in particular 150 ° to 160 °, 110 ° to 130 ° or 140 ° to 160 °. This can be special provided in connection with line-shaped prisms with a triangular cross-section be on one or more, in particular all side walls in the longitudinal direction of the Luminaire extend and in cross section a point angle in a range of 85 ° to 130 °, in particular 90 ° or 116 °.

The invention may also provide that on each side of the soil several adjoining Side walls are provided, according to one embodiment, a the Soil immediately adjacent first side wall with the bottom forms an obtuse angle and between the bottom and another, second side wall, which abuts this first side wall connects and with this first side wall a dull or pointed Includes angle. In this embodiment may be provided in particular that the first side wall has line-shaped prisms with a triangular cross section, the extend preferably in the longitudinal direction of the lamp, a triangular cross-section possess and a point angle in the range of 90 °, in particular 90 °, or a range near 90 °, z. B. 85 ° to 100 °, have, with these prisms to the interior of the body while the second sidewall line-shaped prisms with a triangular Cross-section, which preferably extend in the longitudinal direction of the lamp, and in Cross section a point angle with a value of 90 ° or in a range around 90 °, z. B. 85 ° to 100 °, with the prisms of this second side wall on the outside of the Body lie.

The invention may provide that the refractive structure in a cross section, in particular in a cross section perpendicular to a substantially parallel or slightly inclined to the light exit surface extending lamp axis, the light emission limited such that at least the major part of the light on the reflector side facing is limited to a range of angles below a critical angle β to a perpendicular to the side wall. According to one embodiment of the invention, it can be provided that this restriction is such that above this critical angle only such small amounts of light are emitted that they are perceived below the viewing angles, under which they are perceived by the viewer, to a luminance of less than 1000 cd / m ² lead. However, the invention can also provide that outside the range below the critical angle β further light components are delivered, which are smaller or substantially smaller than the above-mentioned predominant light component, the side wall is then oriented so that such light components, as far as they are in a region above the shielding angle in a plane in which a shield is required to be radiated immediately, resulting in a luminance above the threshold of the shielding condition, being emitted in a direction related to the observer, in which shielding is not required (For example, in a range of angles below the angle to the vertical relative to the vertical or to a ceiling or wall for the purpose of indirect lighting) and / or these light components are irradiated to the reflector or other optical elements of the lamp that this either only in one form over the Lichtaustri be discharged, which corresponds to the shielding conditions.

It can be provided that at each light exit point of the side wall of the angle β is determined by the refractive structure that rays of light at the angle β emerge from the side wall, do not run through said light exit surface.

In particular, it can be provided that all light rays at the angle β from the Side wall exit, on the reflector and / or on other light exit surfaces than the said Light exit surface for direct light emission, e.g. on light exit surfaces for indirect light components.

According to a preferred embodiment, the side walls of the translucent Body opposite to the lamp in the direction of direct radiation Light component lying side, z. B. facing one to the light exit opening Base side, angled. The angle these side walls enclose with the base page is chosen so that the light substantially to the reflector (possibly also to a second Light exit opening) is directed. More precisely, each line cuts the reflector, which with the surface normal of these side walls a smaller angle than that of the Prisms generated limit angle β, which, based on a perpendicular to the side wall, also a shielding angle in the sense of a luminance limit above the Limit angle can be with the above limits. In one embodiment the invention can be provided that the angle to the vertical or to a Perpendicular to the light exit opening, which the above-mentioned critical angle β is equal to the geometric shielding angle defined by the reflector and the lamp or greater than this, with this geometric shield angle than the greatest angle to the vertical or to a vertical defined to the light exit opening is under which a beam of light from the lamp (without the said light directing device) can emerge without being reflected by the reflector. In principle, however, can Other constellations may be provided, in which the refractive structure, in particular the prisms of the light directing device and the shape of the reflector so on each other are tuned that a shield is generated.

The invention may also provide that in a cross section perpendicular to the lamp axis all lines that intersect a side wall of the translucent body and through the edge of the light exit opening, which is closest to this side wall, with, run a perpendicular to the light exit opening include an angle that is smaller than a Limit angle is preferably in the range of 45 ° to 75 °, in particular at 60 ° to 70 ° lies. According to certain embodiments, this angle may be about 60 ° or about 68 °.

The invention may provide that the refractive structure of linear, preferably consists of parallel elements, which in a cross section perpendicular to the line, which the element follows, have a constant cross section.

The said line may in particular be straight and parallel to the longitudinal axis of the lamp and / or parallel to the lamp axis.

It can be provided that the elements are tapered from a base side Have cross section with two sides, which connect to the base, the sum the angle which the tangents to the two sides, passing through the endpoints of the Run base side, with the base side, in an area of 50 ° to 95 °, in particular at 90 ° or 64 °. This cross-section can in particular be perpendicular to a bisector to be symmetrical to the ground plane.

It can be provided that the cross section has a triangular shape. It can in particular be provided that the base side opposite angle is 90 °.

According to the invention it can be provided that the refractive structure, in particular a refractive structure formed in side walls of a light directing body the lamp facing side of a wall of the light directing device or on the formed by the lamp side facing away from a wall of this device. According to A preferred embodiment of the invention comprises all refractive structures in Side walls of a light-directing body either inward, towards the lamp, or to the outside, i. away from the lamp. However, it may also be provided that at different Side walls of a light-directing body, the refractive structure different is oriented, so with one or more side walls inside, to the lamp points out and at one or more side walls to the outside, away from the lamp.

According to the invention, a device may be provided, which light, which differs from the Lamp in the emission direction of the direct light component of the lamp, in particular in a Arrangement of the lamp inside the light, towards the light exit opening for a direct light component is emitted, not or only partially passes.

It can be provided that the bottom of the body is opaque or partially is translucent or that an element is provided between the lamp and the floor, which light does not or only partially lets through.

It can be provided that a reflective or partially reflective and partially translucent element between the bottom and the lamp is arranged.

This element is preferably laid on the ground and may e.g. inserted in the body or glued to the floor. In particular, the element may be a mirror, e.g. out Aluminum, being the lamp's light emitted toward the bottom of the body reflected back. According to one embodiment, the mirror is designed in a form which prevents back reflection on the lamp, e.g. in the form of an involute. According to In other embodiments, the mirror or, more generally, the at least partially reflective one follows Element of the contour of the soil and z. B. just be.

Alternatively, the floor may be covered with an opaque or partially translucent Be provided coating, in particular directed, non-directional or partially directed can be reflective. Such a completely or partially reflective coating can e.g. be applied by vapor deposition. According to other embodiments, the Floor also completely made of a reflective, in particular directionally reflective Material exist.

According to one embodiment, the light exit opening facing side of the body provided with a reflective coating, so that the body on this side like a Primary reflector acts. The light exits through the side walls of the body, and then falls on the reflector of the lamp, which reflects it to one or more light exit openings. This can on the one hand the already mentioned light exit opening for dispensing a be a direct light component. However, the reflector can also with a second light exit opening or, in addition, further light exit openings, for delivery of an indirect Be provided light. According to certain embodiments of the invention, the light exiting the body either directly through such light exit openings Release of an indirect light component emerge or after reflection in the reflector. in principle One can also think of it, above one of the light exit opening for the direct light exit facing away from the open side of the body an opening in the reflector or to provide in the housing, so that light directly from the interior of the body to Dispensing of an indirect light component can escape. Such an embodiment would occur all then considered, if, as is often the case, the indirect light component no Is subject to shielding restrictions.

The invention may provide that an element between the bottom and the lamp is arranged is, which has a refractive structure, the light not or only partially transmits the ground or transmitted light to an angular range to a vertical to the light exit surface, preferably to a range of angles below the Shield angle concentrated.

For example, the element may comprise prisms, the light, in particular vertically incident Light, reflecting back (cat's eye effect).

In particular, the element may have a structure of line-shaped prisms, which in a preferred embodiment, a cross-section with a point angle in one Range of 85 ° to 130 °, in particular 90 ° or 116 °.

In a modification of this embodiment, it may be provided that the floor itself a having corresponding refractive structure, wherein additionally a further element with a refractive structure as described above can be used to the weakening, prevention or concentration on certain areas of the room to improve or allow light passing through the ground. Especially For example, the soil on its outside may have line-shaped prisms with a cross-section in shape a triangle with a point angle of 116 ° and the element line prisms with have a cross section in the form of a triangle with a point angle of 90 °, the preferably parallel to one another, in particular in the direction of the longitudinal axis or the center line the lamp, run. According to various embodiments of the invention the prisms of the element either face the ground or are turned away from it be. This leads to a wide-beam or deep-radiating characteristic of the element of passing light. Due to the orientation of the prisms so can the one Area of the body on which the light passing through the element is incident varies be what further design options in the generation of a desired Luminous intensity distribution curve of the entire luminaire opened. According to the currently preferred Embodiments are the prisms provided at the bottom with a triangular Cross-section and a point angle of 116 ° turned away from the lamp and point Accordingly, based on the direction of the light exit opening for the direct Proportion of light escaping light, to the outside.

In an alternative embodiment it can be provided that the ground on its outside or inside line-shaped prisms with a cross section in the form of a triangle with a point angle of 116 ° and said element also line-shaped prisms having a cross section in the form of a triangle with a point angle of 116 °, in this embodiment, the longitudinal axes of the line-shaped prisms of the ground and the element are not parallel to each other and in particular an angle of 90 ° to each other can include.

The invention may provide that on the bottom of the body a film with a corresponding refractive structure glued or otherwise applied.

The invention can provide that the light-directing device a light-directing body comprises, whose bottom is formed integrally with the side walls.

This embodiment is particularly advantageous when the body is made of a translucent Material exists, even if there is an immediate light leak across the floor is prevented, by light conduction within the body a comparatively small amount of light is discharged over the bottom, so that it brightens against the light exit opening and the light / dark transition between the body, the viewer in the Light exit opening sees, and the remaining light exit opening is mitigated.

It can be provided that the side edge of the bottom and the side walls each with a chamfer, which extends only over part of the thickness, so that bottom and side walls are connected by a portion of material, wherein the bevels lie in the manner of a miter to each other.

This allows the body to be made of a flat material that borders on between the Sections that are to form the floor or the side walls, has a notch, too fold and thereby produce in a particularly simple manner.

It can also be provided that this notch on the same side of the starting material is formed as the refractive structures. This allows a particularly simple Production, since then the starting material must be structured only on one side. If the refractive structures are located on the outside of the finished body should, where appropriate, additional elements of the body or the lamp, such as Retaining clips, guide devices or the like may be provided, which Keep the side panels in position relative to the floor. It can, for example, too be provided that the notch, which in this case lies on the outside of the body, is filled with a suitable material. For example, you could change the range of Spray notch or even a bar or other element in this notch introduce and there, z. B. by gluing, fix. In this way, the location of the Sidewalls are stabilized. Depending on requirements, the inserted material can be the same or have similar optical properties as the body or not.

The invention may provide that one or more side walls and / or the bottom of a Device for the positive retention of one or more plate- or foil-shaped Having elements with a refractive structure.

In this embodiment, the body consists of several parts, namely one A body, which is preferably unstructured, and plates or sheet-like elements with the refractive structure. In a particular embodiment, the device exists from grooves between which the elements are guided, so that they are plugged in a simple manner can be.

In a modification of this embodiment may also be provided that the side walls and the floor are separate parts. According to one embodiment, the Sidewalls then glued to the floor. According to an alternative embodiment The side walls are inserted into corresponding recesses in the ground, where they possibly be secured by a snap or clamp connection or otherwise.

In embodiments with a multi-part body, it is advantageous if the bottom is made A translucent material consists of the light / dark transitions between the Soil and the rest of the light exit opening, which were explained above, mitigate. The passage of light from the sidewalls into the ground may be through use an adhesive with a similar refractive index to that of the bottom and sidewalls, more generally, by filling in spaces between sidewalls and soil with a material with a similar refractive index as that of the soil and the side walls, to be improved.

The material of the light-directing body or the elements of the light-directing device For example, a plastic, e.g. Polymethyl methacrylate (PMMA), polystyrene (PS), a Styrene-acrylonitrile copolymer (SAN) or polycarbonate (PC), wherein the plastic is preferably is extrudable, or glass, z. B. BK7, his.

In particular, the invention also provides a method for producing a light-directing Body for use with a luminaire as described above available, in which in a flat material (preferably two) the later side walls corresponding sections and an intervening, corresponding to the ground section are set, and then set up the side portions relative to the bottom portion become.

It can be provided in particular that at the border between the area of Side surfaces and the area of the bottom the thickness of the material is less, to the bending to facilitate.

In particular, indentations with inclined surfaces can be provided in this area, which after setting up the side walls a miter between the side walls and represent the bottom part.

As already mentioned above, in an alternative embodiment, such Notches should also be provided on the side which after setting up the Sidewalls located on the outside. This in particular has an advantage when the outside the side walls should be structured.

The invention also provides a method of making a photoconductive body for use in a luminaire as described above, in which a one-piece body with a bottom surface and two side surfaces angled for this purpose, preferably by extrusion, is prepared and then sheet-shaped Elements, in particular plates or films, which have a refractive structure, in particular a structure of line-shaped parallel prisms, more preferably a structure of parallel line-shaped prisms with a triangular cross-section, on the side walls and / or attached to the floor.

The invention may provide that the elements with the refractive structure to the Side surfaces and / or glued to the bottom surface of the body.

According to another embodiment it can be provided that the body is a guide has for the sheet-like elements with the refractive structure and these in the Guide be used so that they are held there form-fitting.

Alternatively it can be provided that these sheet-like elements are provided in another way, e.g. held by clamp connections, snap-in connections, or the like to a body become.

The invention further provides a method of manufacturing a light directing body Use in a luminaire as described above available at in which the body has a bottom element and has separate side walls therefrom, wherein the bottom element has one or more receptacles for receiving the side walls and one or more sidewalls are inserted into such receptacles. Especially the receptacles may have the shape of a groove, in which the side walls are inserted become. The receptacle can with a securing device, in particular a locking connection, be provided, which locks the side walls in the receiving device, jammed or otherwise secured.

In this manufacturing process, the side walls and / or the floor can already before the assembly having a provided with a refractive structure outer wall. However, they may also be unstructured in this assembly, and then, as above has been described, sheet-like elements which the required refractive Have structure, attached to the side walls and / or the floor, in particular by gluing, by insertion in guide grooves or the like.

If the refractive structure is formed in a separate element, which is connected to the actual Body is mounted in the manner described above, it is advantageous that this element is mounted so that the structure to the side wall or the Ground on which the element is attached, points, so that the finished body to the outside a has smooth surface and the refractive structure in the space between the Elements and the actual body is so that it is protected from contamination. The elements are preferably located inside the actual body.

According to one embodiment of the invention can be provided that the light-directing Device has a bottom portion, which is followed by a cover, which together defines a cavity with the bottom portion. The cover can be both on the side facing the light source as well as on the side facing away from the light source Side of the bottom portion may be provided. The bottom section can in particular be the bottom of a light directing body.

Advantageously, in the formed by the bottom portion and the cover Cavity electrical and / or mechanical components of the lamp, in particular wiring, Ballasts, switches and the like. Be arranged.

The invention may provide that the bottom of the light-directing body by a support profile, In particular, a V-shaped support profile, is formed and to this support profile on the side facing away from the lamp, a cover connects, which together with the Carrier profile defines a cavity. On the support profile lighting components, which in the cavity are arranged to be attached.

The support profile is preferably reflective on the side directed towards the lamp or it is a reflective element that covers the support profile, between provided the support profile and the lamp. This reflective element can be instantaneous rest against the support profile. However, it can also be partially or completely of the Be spaced support profile.

The above-mentioned cover can be reflective, advantageously diffusely reflecting, e.g. be formed matt white, so that the middle part of the lamp over which no light emerges, is brightened by reflection on the cover.

The cover may be made of an opaque material, such as metal or consist of an opaque plastic. However, it can also be made of a translucent or photoconductive material, e.g. also from such a material, that is formed light scattering, such as diffuse scattering PMMA. According to another embodiment For example, the cover may be made of a clear, transparent material, e.g. clear PMMA consist, wherein on one of its surfaces a light-scattering structure, for example a prism structure is formed, which is a light scattering of the passing and / or of the reflected light causes. According to a further embodiment can also be provided be that the cover of a translucent material, in particular a clear or diffusely translucent material which, preferably on the side, the the cavity enclosed with the support profile facing, with a diffuse or directionally reflective layer is provided.

Figur 1

zeigt eine erste Ausführungsform einer erfindungsgemäßen Leuchte,

Figur 2

zeigt eine vergrößerte Detailansicht der Leuchte gemäß Fig. 1,

Figur 3a und 3b

illustrieren das Abstrahlverhaltens einer horizontalen Prismenplatte, wie sie erfindungsgemäß verwendet wird,

Figur 4a und 4b

illustrieren das Abstrahlverhalten einer verkippten Prismenplatte, wie sie erfindungsgemäß verwendet wird,

Figur 5

illustriert das Abstrahlverhalten einer Leuchte gemäß Figur 1,

Figur 6

zeigt das Abstrahlverhalten einer Abwandlung der Leuchte nach Fig. 1 mit direkter und indirekter Lichtabstrahlung.

Figur 7

illustriert eine weitere Ausführungsform der Erfindung,

Figur 8

illustriert eine weitere Ausführungsform eines lichtlenkenden Körpers, der erfindungsgemäß verwendet werden kann,

Figur 9a und 9b

illustrieren ein erstes Herstellungsverfahren für einen erfindungsgemäßen lichtlenkenden Körper,

Figur 10

illustriert ein zweites Herstellungsverfahren für einen erfindungsgemäß verwendeten lichtlenkenden Körper,

Figur 11

illustriert ein drittes Herstellungsverfahren für einen erfindungsgemäß verwendeten lichtlenkenden Körper.

Figur 12

illustriert eine weitere Ausführungsform eines lichtlenkenden Körpers,

Figur 13

zeigt eine weitere Ausführungsform einer erfindungsgemäßen Leuchte,

Figur 14

zeigt den lichtlenkenden Körper der Ausführungsform der Figur 13 zusammen mit der Lampe in einer schematischen, nicht maßstäblichen Darstellung,

Figur 15

zeigt den lichtlenkenden Körper zusammen mit zwei Lampen bei einer Abwandlung der Ausführungsform der Figur 13 als zweilampige Leuchte in einer schematischen, nicht maßstäblichen Zeichnung,

Figur 16

zeigt eine weitere Ausführungsform einer erfindungsgemäßen Leuchte,

Figur 17

zeigt eine weitere Ausführungsform einer erfindungsgemäßen Leuchte,

Figur 18

zeigt den lichtlenkenden Körpers des Ausführungsbeispiels der Figur 17,

Figur 19

zeigt eine weitere Ausführungsform einer erfindungsgemäßen Leuchte,

Figur 20

zeigt eine abgewandelte Ausführungsform eines lichtlenkenden Körpers gemäß einer Ausführungsform nach Figur 17,

Figur 21

zeigt eine weitere Abwandlung des lichtlenkenden Körpers bei einer Ausführungsform der Figur 17,

Figur 22a

zeigt eine Ausführungsvariante der Abdeckung der Ausführungsform gemäß Figur 17,

Figur 22b

zeigt eine Ausführungsvariante der Abdeckung der Ausführungsform der Figur 17,

Figur 22c

zeigt eine Ausführungsvariante der Abdeckung der Ausführungsform der Figur 17.

The invention will be explained in more detail by means of embodiments with reference to the accompanying drawings.

FIG. 1

shows a first embodiment of a lamp according to the invention,

FIG. 2

shows an enlarged detail view of the lamp according to FIG. 1,

Figure 3a and 3b

illustrate the radiation behavior of a horizontal prism plate, as used in the invention,

FIGS. 4a and 4b

illustrate the radiation behavior of a tilted prism plate, as used in the invention,

FIG. 5

illustrates the radiation behavior of a luminaire according to FIG. 1,

FIG. 6

shows the radiation behavior of a modification of the lamp according to Fig. 1 with direct and indirect light emission.

FIG. 7

illustrates another embodiment of the invention,

FIG. 8

illustrates another embodiment of a light directing body that can be used in accordance with the invention,

FIGS. 9a and 9b

illustrate a first manufacturing method for a light directing body according to the invention,

FIG. 10

illustrates a second manufacturing method for a light directing body used in the invention,

FIG. 11

illustrates a third manufacturing method for a light-directing body used in the invention.

FIG. 12

illustrates another embodiment of a light directing body,

FIG. 13

shows a further embodiment of a luminaire according to the invention,

FIG. 14

shows the light-guiding body of the embodiment of Figure 13 together with the lamp in a schematic, not to scale,

FIG. 15

shows the light-directing body together with two lamps in a modification of the embodiment of Figure 13 as a two-lamp lamp in a schematic, not to scale drawing,

FIG. 16

shows a further embodiment of a luminaire according to the invention,

FIG. 17

shows a further embodiment of a luminaire according to the invention,

FIG. 18

shows the light-directing body of the embodiment of Figure 17,

FIG. 19

shows a further embodiment of a luminaire according to the invention,

FIG. 20

shows a modified embodiment of a light-guiding body according to an embodiment of Figure 17,

FIG. 21

shows a further modification of the light-directing body in an embodiment of Figure 17,

FIG. 22a

shows a variant of the cover of the embodiment according to Figure 17,

FIG. 22b

shows a variant of the cover of the embodiment of Figure 17,

FIG. 22c

shows a variant of the cover of the embodiment of Figure 17.

The lamp shown in Figure 1 as an embodiment of the invention has a rod-shaped elongated lamp 1 and an elongated reflector 3, in which the lamp 1 is received and whose longitudinal axis is parallel to the lamp axis. The reflector 3 has a light exit opening 5. On the opposite side of the light exit opening Side of the reflector 3 is a bird's wing-shaped roof reflector 7 is provided, the over a stage 8 connects to the reflector 5. The reflector 3 and the roof reflector 7 are total formed so that the lamp to the center plane, which is designated in Figure 1 with S, is symmetrical. The entire reflector construction therefore consists of two mutually symmetrical Halves that collided at an angle in the median plane S and one Form edge 9. The reflector construction can consist of a part that in the constructed previously described manner. However, it can also consist of several parts consist. The roof reflector 7 may, but need not, for example, be a separate one Be part that is inserted into an opening of the reflector 5.

The lamp surrounds a light directing body 10, the two straight side walls 12 and a straight bottom 14 which is parallel to the light exit opening 5 substantially. The Side walls 12 close with the median plane S an angle α, preferably 20 ° is. Accordingly, the side walls 12 close to the bottom 14 one each Angle of 70 °. Overall, the body 10 in cross section has the shape of a tip truncated triangle. The side walls 12 extend in the direction of the light exit opening away to the roof reflector 7. As can be seen in the figure 1 and Shown enlarged in Figure 2, the side walls 12 are located at the level 8 between the Reflector 3 and the roof reflector 7, so that there is no gap through which the Walls 12 past light on the reflector 3 can occur. As can be seen in FIGS. 1 and 2 is, the side walls 12 and the bottom 14 on its outside with line-shaped prisms which follow parallel lines which are parallel to the longitudinal axis of the Luminaire extend and accordingly perpendicular to the plane of the figure 1 and 2, respectively stand. In a cross section perpendicular to the longitudinal axis of the luminaire, these prisms have a triangular cross-section, the angle at the top of the prisms, in Figure 2 with y designated, 90 °.

The floor 14 as well as the area of the transition from the floor 14 to the side walls 12 is covered on the lamp 1 side facing with a mirror element 20, which the light incident on this area reflects back and an immediate passage prevented by light through the bottom 14. The mirror element 20 can be made, for example Aluminum or other glossy material and can in particular a pickled Be a component. However, it may also be a foil with which the Inside the body 10 is lined in the corresponding area. Alternatively could also a coating, e.g. by steaming, provide. As material for the mirror element 20 come usual high gloss materials into consideration. Particularly preferred are the Materials MIRO and MIRO SILVER from Alanod or the material VISIBLE MIRROR from the company 3M, which have a reflectance of 94% or more.

Overall, the structure of the light shown in Figure 1 is symmetrical to the center plane S; In particular, the lamp longitudinal axis is arranged in the plane S.

The mode of action of the prisms on the side walls 12 is shown in FIGS. 3a and 3b or 4a and 4b can be seen. FIG. 3a schematically shows the horizontal arrangement of a corresponding one Prism plate with a lamp arranged above. The luminous intensity distribution curve of FIG. 3b shows that the emitted light is substantially at a range of 45 ° to the vertical is delivered. The corresponding range of the luminous intensity distribution curve is A designated. The angle to a perpendicular to the plate, which limits the area A, is denoted by β. In the illustration of FIG. 3b and the corresponding representation of 4b, the arrangement shown in Fig. 3a and 4a, respectively, as an idealized punctiform light source considered at the center of the coordinate system. The angle β thus corresponds the angle of a straight line passing through the center of the coordinate system and the Edge of area A touches to the perpendicular to the plate. Beyond 45 °, especially in the areas designated B, only light emitted in the Compared to the light component A are relatively small. However, small amounts of light can, however be essential for glare, as in the luminance, which for the assessment of the glare properties a luminaire, the cosine of the viewing angle inversely proportional, so that even small light intensities at large angles near 90 ° could lead to glare. Figure 3a shows the same prism plate, however now oriented so that it encloses an angle of 15 ° with the vertical. Corresponding the tilting of this prismatic plate also tilts the luminous intensity distribution curve such that the predominant part of the light emission above an angle β ', in the illustrated Example in a range of 60 ° to 150 ° to the vertical, is delivered. The Lights B, which could possibly lead to glare, are no longer lying in an area near 90 °, as in the arrangement of Figure 2a, but on the one hand in a Range between 0 ° and 60 ° on the one hand and on the other hand in a range of about 180 °. Both angular ranges are not relevant for the glare limitation.

According to the embodiment shown in Fig. 1, the angle is now α, ie the angle to the vertical, by which the side walls 12 are inclined to the vertical, chosen so that the light component A corresponding light incident on the reflector 3 or at least not is emitted directly via the light exit opening for the direct light component. there In particular, the angle α can be chosen so that a light component A corresponding Part of light that emerges at a point of a side wall, which is the light exit opening nearest to the direct light emission, limited by a straight line through this point which cuts or at least contacts the reflector.

In this embodiment, the light emission of the light component A takes place on the reflector 3, so that these light components not directly, d. H. by light emission without prior Reflection, can lead to glare, while the minor parts B either in the unshielded area are radiated below φ in which the glare is not critical, or are discharged vertically upward toward the reflector 3.

As a result of the construction according to FIG. 1, on the one hand there is an immediate passage of light is prevented by the bottom 14 and on the other hand provided with prisms Side walls 12 are inclined at an angle α to the center plane S, a complete glare reaches the luminaire, as it was otherwise achieved by a light grid. FIG. 5 schematically shows the beam diagram of the lamp of FIG. 1. It can be seen that the Light, which is emitted via the side walls, almost completely to the reflector 3 is reflected, and from the bottom 14 no light emerges. It has been shown that a Luminaire with the construction of Figure 1 not only in the longitudinal and transverse directions, but also is blinded in diagonal planes. Currently, it is assumed that the glare in Transverse direction occurs through the interaction of the prisms and the reflector while the glare in the longitudinal direction, at least predominantly by the prisms on the side walls is brought about.

Characterized in that the body 10 consists of one piece and the side walls 12 and the bottom 14 directly merge, it is achieved that the bottom 14 despite the mirror element 20 does not appear completely dark because due to light conduction in the body 10th a small portion of the light incident on the side walls 12 in the body 10 to the Bottom 14 is passed and exits there in the direction of the light exit surface 5.

To improve the efficiency, it is advantageous, the roof reflector 7 and the mirror element 20 in such a way that a total reflection in the side walls or, if separate Prism sheets or foils are attached to the sidewalls in these prism sheets or foils are avoided. It should in the presented embodiment at least the majority of reflected from the roof reflector or the mirror element Beams an angle of incidence with respect to the normal to the side wall of have less than 60 °.

In the embodiment shown in Figure 1, it would not be necessary in and of itself the bottom 14, as shown in Figure 1, on its outside with the line-shaped prisms is provided with a triangular cross-section. However, manufacturing technology often makes it easier to provide the whole body with prisms on the outside. The prisms at the Outside of the bottom 14, however, may be of importance, if in a modification the embodiment of the mirror element 20 is not complete, but only partially reflective and partially translucent. In this case, there is some light guidance through the prisms and a concentration of the emitted luminous flux, as shown in FIG 3b in the form of area A, desired.

In a modified embodiment of the invention, the reflector 3 has both Side of the light-conducting body 10 openings for the discharge of an indirect light component, the are designated 30 in Figure 6. In Figure 6, the beam paths of the lamp over drawn the body 10 emitted light. It can be seen in particular that on the Apertures 30 a light component is delivered up, while the roof reflector 7 a direct exit of the light from the body 10 in the opposite to the light exit opening 5 Direction prevented. In this embodiment, the light components, which are discharged through the openings 30, usually no glare limitation. Therefore, by a suitable design of the prisms and / or a suitable choice of Angle α the light components that could otherwise lead to glare, to the openings 30 are conducted. In particular, it can be provided that the range of a light component B or the region of the light portion A with the region of the openings 30 partially overlapped or even, in the case of the lights B, coincides with them. In a modification In this embodiment, the roof reflector 7 could amplify the indirect light component omitted.

In a modification, not shown, of the embodiment of Figure 1 can also be provided be that the light-directing body, in the embodiment of Figure 1 on the reflector facing side is open, is closed on this page and on the the reflector side facing also a translucent wall with a refractive Structure, for example, a structure of parallel line-shaped prisms, the extends in the longitudinal direction of the lamp has. In this case, the body of the roof reflector 7 be spaced so that the main light component of the radiated over the body Light, which corresponds to the light component A in Figure 3b or 4b, to the reflector 3 or the roof reflector 7 is incident.

Figure 7 shows a modification of the embodiment of Figure 1, in the same elements as in the embodiment of Figure 1 are provided with the same reference numerals. At this Embodiment essentially eliminates the mirror element 20. Instead, is a Plate 40 of a translucent material placed on the bottom 14, which on her Bottom, facing the floor, line-shaped parallel prisms with a dreiekkigen Cross-section, with respect to a plane perpendicular to the longitudinal axis of the lamp, have, Similar to the embodiment of Figure 1 was provided for the side walls 12. The side walls 12 are as in the embodiment of Figure 1 with line-shaped prisms provided with the cross-sectional shape of a right triangle. The lines that the Define prisms of the plate 40 and the bottom 14 are parallel to each other and to the Longitudinal axis of the lamp. In contrast, the bottom 14 is provided with line-shaped prisms, which in a cross section perpendicular to the lamp axis in the shape of a triangle have a tip angle of 116 °, as indicated in Figure 7. Side of the Elements 40 reflector portions 42 may be provided, with which the transition region is covered by the bottom 14 to the side walls 12 and prevents that in this Edge area light emerges uncontrolled.

In the embodiment of FIG. 7, the plate 40 generates a concentration of the light component in a range of ± 45 ° with respect to the center plane S, as shown in FIGS. 3a and 3b. However, this is not completely sufficient for glare control with the shielding angle φ of 65 °. Therefore, in addition to the bottom of the prisms are provided with a point angle of 116 °, which suppress the corresponding light components above the shielding angle φ, which could lead to glare, in particular those light components, which are designated in Figure 3b and 4b with B, or to redirect to smaller angles. As a result, the light in the longitudinal and transverse directions, but preferably also be blended in several levels.
Figure 8 illustrates an alternative form of the body 10 in which the side walls 12 and their orientation to the median plane S have remained unchanged, while the bottom 50 consists of two obliquely to the median plane portions 52a and 52b, which with the median plane in each case an angle of 70 ° and with the side walls at an angle of 90 °, so that the side walls 12 in turn form an angle of 20 ° with the median plane.

The body 10 can be made in various ways. For example, the Basic shape of the body produced in a known manner, in particular extruded or through Hot deformation can be made from a plate. The prisms can e.g. incised or glued on. It is also possible to separate the side walls and the floor To produce parts and glue together to the overall body 10, wherein between ground and side plates mitres for joining the parts are present.

An advantageous manufacturing method is illustrated in FIG. In this manufacturing process become in a flat material sections 62a and 62b, which later the side walls and an intervening section 64 determines which one later should correspond to the ground. Between these sections is a longitudinal direction extending triangular notch provided, however, the parts 62 a, 62 b and 64 not separate from each other, but this over a residual strength of the material, so to speak via a film hinge, connects. Subsequently, the side walls 62a and 62b, as shown by the arrows in Figure 9a, placed to the shape of Figure 9b, wherein the sides of the original notch are now in the manner of a miter. to Stabilization these edges can be glued together or there may be other means be provided to stabilize the body in the lamp. In a not shown In alternative embodiments, the indentations between sections 62a, 62b and 64 on the side on which the refractive structures of the Side walls are formed and which in the finished body (see Figure 9b) to the outside has.

Figure 10 illustrates another way of making the body. In this type of production For example, an open-topped trapezoidal profile is created, e.g. by extruding, taking the profile In the region of the side walls 72 at the upper and lower end grooves 74, in which Sheets or sheets 76 which provide the prism structure required for the sidewalls, i. the Structure with the line-shaped parallel prisms, which have a cross section in the form of a have right-angled triangle, used, preferably inserted .. In FIG 10, the mirror element 20 is shown again. This can be inserted or glued on be coextruded and after extrusion with a reflective coating be provided or lined with a reflective film. In a modification the illustrated embodiment may instead of plates or foils, with a prism structure or other refractive structure, including plates, Foils or other elements are attached, which are reflective or at least partially reflective, in particular specularly reflective, to an asymmetric Light emission of the lamp to produce or otherwise the Lichtabstrahlcharakteristik to change

Figure 11 shows another way of assembling the body. In this embodiment the body consists of separate side parts 80 and a separate bottom part 82, wherein the Floor part has a groove 84 for insertion of the side parts 80. This is a snap connection provided, which locks the side wall in the groove 84 (see Figure 10, reference numeral 86). It should be noted, however, that this illustration only schematically a Rastverbindung indicates. In practical applications, for example, one becomes a separate one Provide locking groove for locking the side walls and for locking with a locking tongue.

Figure 12 illustrates another embodiment of a light directing body in which on the ground on both sides in each case several side walls in the manner of a polygon course connect. Closer close to the bottom 90, for example, as the bottom 14 in the Embodiment of Figure 1 or 7 may be formed on both sides in each case first Side walls 92 which are parallel to the longitudinal direction of the body and to the lamp axis extending line-shaped prisms, which in a cross-section perpendicular to the Longitudinal axis have a triangular cross section, which has a point angle of 90 ° have. As can be seen from Figure 12, these prisms are towards the interior of the body directed. The side walls 92 are followed by side walls 94, which are also in Longitudinal direction of the body or in the longitudinal direction of the lamp extending linear Have prisms, which, based on a cross-section perpendicular to the longitudinal axis of the body, have a triangular cross section having a point angle of 90 °. In contrast to the prisms of the side walls 92, these prisms have, as in FIG. 12 shown, outward. Depending on whether the prisms are directed inwards or outwards, produce a different light emission characteristic of the light passing through them, which can be used to advantage for the design of the light intensity distribution.

FIG. 13 shows a further embodiment of a luminaire according to the invention. Same or Similar elements as in the embodiment of Figure 1 are denoted by the same reference numerals provided and are not explained in detail.

In the embodiment of Figure 13, the light directing body 100 has two translucent ones Side walls 102 which blunt with the bottom 104 of the body Include angle, which is 117 ° in this specific embodiment. The body 100 is made of one piece, wherein the bottom of the body with a reflector 108th is covered, which reflects the incident light of the lamp 1 back into the body.

The reflector 108 is laterally bent over and covers the side walls 102 over a small partial area. The end point of the reflector 108 is designated P ₁ .

The side walls 102 are provided on their inside with a refractive structure, which of oblong, in the direction of the lamp longitudinal axis translation invariant prism elements consists of a triangular in a cross section perpendicular to the longitudinal axis of the lamp Cross section with a point angle of 90 °.

The reflector 3 is, unlike the embodiment of FIG. 1, pulled down beyond the level of the bottom 104, so that the bottom 104 is at a distance from the light exit opening 5. The connecting line between the edge R of the reflector 3 and the point P ₁ defines the maximum angle at which light can escape from one of the side walls 102 without being reflected by the reflector 3. In this particular embodiment, this angle is about 68 °. Thus, a geometric shielding of the light-directing body 100 is generated by the reflector 3.

In FIG. 14, the light-directing body 100 is shown enlarged together with the lamp 1, wherein for clarity, the prisms of a side wall 102 are shown larger than on the opposite side wall. In fact, the prisms are on both sidewalls same size. It can be seen in Figure 14 that a prism of the refractive structure on the Inside the side wall 102 only a small angular range of the lamp directly covering radiated light. This angle range is on the right side of the figure 14 shown greatly enlarged. Typically, a prismatic element covered by a triangular cross-section is defined, approximately an angular range of 6 °, this range may be larger or smaller in different embodiments.

In FIG. 15, the light-directing body is a modification of the embodiment of FIG. 13 as a two-lamp lamp sketched together with the associated lamps. In this embodiment For example, lamps 110a and 110b are symmetrical about the center plane S in the light directing Body 100 arranged, which may be opposite to a single-lamp embodiment be widened, but also have the same width as a single-lamp embodiment can. In FIG. 15, for the sake of simplicity, only the light-conducting body 100 is together with the lamps 110a and 110b shown. The rest of the training of the lamp, in particular of the reflector 3 and the roof reflector 7 is analogous to the embodiment of FIG. 13.

FIG. 16 shows in a partial view a further modification of the embodiment of FIG Figure 13 as a partially direct and partially indirect luminaire. In this embodiment the roof reflector 120 is provided with an opening 122 through which light the Lamp 1 can escape immediately upwards. The rest of the design of the lamp, in particular of the reflector 3, is analogous to the embodiment of Figure 13. However in this embodiment, the light-directing body, generally designated 124, does not made of one piece, but has two plates 126, each on its inside are provided with prisms with a point angle of 90 °, which the side walls of the light directing body, while the bottom 128 through a simple reflector sheet becomes. The plates 126 and the bottom 128 may suitably, for example by gluing, welding or grouting or by a positive, frictional or non-positive Be connected to each other. In Fig. 16, for the sake of simplicity the reflector 3 is shown only on the left side of the figure. In the preferred embodiment is the lamp, analogous to the lamp according to Figure 13, a mirror image of the median plane S formed, i. it closes on the right side of the picture to the roof reflector 120 an unillustrated reflector 3, which extends below the bottom 128. Basically, however, it is also conceivable, an (asymmetrical) lamp with a Configuration as shown in Figure 16 to realize within the scope of the invention. at this lamp would then be present on both sides of the plane S of the roof reflector 120, while only on one, for example, the left side of the reflector 3 would be present and the corresponding area on the other side would remain clear. In this case, over the right side wall 126 the light emitted directly and not, as on the left side, deflected over a reflector. Such training can be useful if on the Both sides of the plane of symmetry S to realize different lighting tasks or even if, for structural reasons, a reflector on the right side of Symmetry level S is difficult or impossible to realize.

While in the embodiment shown in Figure 16, the roof reflector 120 has an opening 122 for the exit of an indirect light component, instead of the opening 122 or in addition to the opening 122, a light exit surface in the reflector 3 outside of Be provided portion of the light-directing body 124, ie in the representation of the figure 16 in the area to the left of the left side wall 126. This light exit surface may e.g. be designed as a perforated plate section or as a further opening in the reflector 3, as this has already been explained above.

Figure 17 shows another embodiment of a lamp according to the invention, wherein again the same or similar elements as in the previous embodiments with are denoted by the same reference numerals. In FIG. 18, the light-directing body is the Embodiment of Figure 17 shown together with the lamp separately.

In this embodiment of FIG. 17, the light-directing body 130 again has two Side walls 132, which blunt with the plane of the light exit opening 5 each one Angle, measured from the top of the side walls 132, ie counterclockwise in the left half of the illustration and clockwise in the right half of the Representation, include. With the median plane S close the side walls in this embodiment, as shown in Figure 17, each at an angle of 30 °. The floor However, the light-directing body in this embodiment has a V-shape with two Surfaces 134a and 134b, which enclose an angle of 110 ° to 120 ° to each other and to touch each other in the plane of symmetry S. Structurally, the floor is made up of one Supporting profile 136 and an attached reflector 138 above the side walls 132 close directly to the support plate 136 and the reflector 138 and are in this embodiment on the reflector 138. On the underside of the supporting profile is a ballast 140 attached. Toward the light exit opening 5, the support plate 136 and the ballast 140 covered by a cover 142, which in this embodiment the plane defined by the edge of the reflector 3 touched, but also before this Level may end or beyond this level out of the light exit opening 5 out can extend.

The cover 142 has a concave channel shape and closes with its end respectively to the Support profile 136 and the side walls 132 at. The end point of this coverage defines together with the edge R of the reflector 3, a straight line which to the vertical or to the Symmetry S includes an angle of 60 °.

The cover 142 is as a dull or diffuse scattering reflector, for example with a matt white paint, formed. As a result, on the one hand light, the from the reflector 3 to the cover 142 is reflected, and on the other hand also Scattered light reflected in the room, so that the area of the cover 142 appears brightened.

As with the embodiment of FIG. 13, the sidewalls 132 face the lamp 1 facing side prism elements, which in the direction of the lamp longitudinal axis are translation invariant and in a cross section perpendicular to the lamp longitudinal axis a have triangular cross section, wherein the apex angle of this cross section is 90 °.

Figure 19 shows a modification of the embodiment of Figure 17, in which the Abdekkung 150 is not round, but angular and adapted to the shape of the ballast. at this embodiment is also the transition between cover 150, support profile 136, Reflector 138 and side wall 132 designed differently than the side walls 132 on the Stand up support section 136, the reflector 138 ends on the side walls 132 and the cover 150 extends slightly beyond the support profile in the area of the side walls 132.

Also in this embodiment, by the free end of the cover 150 and the Edge of the reflector 3 defines a straight line, which with the vertical or the center plane S includes an angle of 60 °. In this embodiment, have the side walls 132 on the side facing away from the lamp 1 side of a structure of refractive elements in the form of prisms which are translationally invariant in the direction of the longitudinal axis of the lamp and a cross section perpendicular to the lamp longitudinal axis has a triangular cross section with a point angle of 90 °. In this embodiment, the side walls 132 inclined to the center plane S stronger than in the embodiment of Figure 17; in the concrete embodiment, the angle between the side walls 132 and the median plane S about 60 °.

FIG. 20 shows a modification of the embodiment of FIGS. 17 and 18, in which the light-directing body has only one reflective sheet 160 instead of one carrying profile. The cover 162 is formed of polymethyl methacrylate (PMMA). The cover 162 is welded or glued to the side wall 164 at the point P ₂ . In the space enclosed by the sheet 160 and the cover 162 a ballast 140 is housed.

FIG. 21 shows a further embodiment of a light-directing body which is largely the embodiment of Figure 20 corresponds. However, in this embodiment the cover 162 at its end a groove on the bottom of a projection 170 of the side wall 164 is up. This projection 170 has a smaller thickness than the remaining side wall 164 and each goes over two to the projection 170 at a right angle angled Paragraphs in the actual sidewall 164 about. At these paragraphs are on one side of the end of the cover 162 and on the other side of the reflector 160 at. The side wall 164 and the cover 162 can again by welding or gluing be connected to each other.

FIGS. 22a to 22c show various possibilities of forming the cover 162.

In the embodiment of Figure 22a, the cover 162 is made of an opaque, diffusely scattering plastic, e.g. PMMA treated accordingly. In the embodiment In FIG. 22b, the cover is made of transparent PMMA. On your Inside it is provided with an opaque, reflective layer 172, which be prepared for example by co-extrusion, painting, hot stamping or steaming can. In the embodiment of Figure 22c, the cover is made of clear PMMA and has on its inside a structure of grooves or prisms, which the incident on them or sprinkle light passing through them.

In the embodiment of Figures 17 to 21, the bottom of the light-directing body an exact V shape. In a modification of this embodiment, of course, too the reflecting surfaces 134a and 134b are curved. The fact that in an advantageous manner the Tip of the soil in the plane of symmetry S is, in which also the lamp longitudinal axis and, on the other hand, the open side of the V-shaped profile of the bottom of the lamp 1 turned away, is achieved in an advantageous manner that of the lamp incident on the ground Light is reflected to the side walls 132 or the roof reflector 7 and avoided is that light is reflected back to the lamp 1. Other, known reflector shapes, which avoid a return reflection on the lamp 1, instead of the illustrated Reflector shape can be used, in particular reflectors with a Evolenten- or cycloid shape.

A luminaire according to the invention can in particular be a screen workstation lamp, a Luminaire for lighting industrial areas, manufacturing plants, warehouses or halls, in particular Industrial halls, be. Inventive lights can be used, for example, as recessed lights, Surface-mounted lights, pendant lights, floor lamps and wall sconces, without that the scope of the invention would be defined exhaustively.

Numerous modifications and variations of the embodiments described above are possible within the scope of the invention. For example, the side walls may be different have refractive structures and / or different transmission properties have. In principle, it is also conceivable that the refractive properties or transmission properties within the sidewalls are different. As well can be provided that one or possibly more side walls formed reflective are, this training can be such that this side wall completely is reflective or that it partially reflects and partially transmits light.

In the embodiments described above was in each case a light-directing Body provided, which surrounds the lamp right, left and bottom, so has walls, extending on different sides of the lamp (e.g., right, left or bottom). in principle this can be deviated from. For example, it can be provided that the Lamp is surrounded only on two sides of the light-directing body, so that, for example the light directing body has a first wall that is to the left of the lamp is located, and a floor that is located below the lamp, while to the right of the Lamp and above the lamp no wall is provided. However, it can also be provided be that on all four sides of the lamp, so right, left, up and down, each walls of the light directing body. While previously predominantly single-lamp Lights were shown for simplicity, all described above Embodiments also be designed as two-lamp lights, where appropriate, the reflectors and / or light directing elements to the location and geometry of the two lamps must be adapted. Likewise, the invention also in lights with ring lamps be used.

The features disclosed in the specification, the claims and the drawings Invention can be used individually as well as in any combination for a realization the embodiments that are different from the invention are essential.

LIST OF REFERENCE NUMBERS

1

lamp

3

reflector

5

Light opening

7

top reflector

8th

step

9

edge

10

light-directing body

12

Side wall

14

ground

20

mirror element

30

Opening in the reflector

40

plate

42

reflector sections

50

ground

52a, 52b

floor sections

62a, 62b

material portions

64

material section

72

Side wall

74

groove

76

Plate or foil

80

side panel

82

the bottom part

84

groove

90

ground

92

Side wall

94

Side wall

100

light-directing body

102

Side wall

104

ground

108

reflector

110a

lamp

110b

Lamp (in description change reference)

120

top reflector

122

opening

124

light-directing body

126

Side wall

128

ground

130

light-directing body

132

Side wall

134a

floor area

134b

floor area

136

support section

138

reflector

140

ballast

142

cover

150

cover

160

Reflective sheet metal

162

cover

164

Side wall

170

head Start

172

reflector

S

midplane

P ₁

Edge of the reflector 108

P ₂

Edge of the cover

R

Edge of the reflector 3

Claims (34)

Luminaire with a light source (1) and a reflector (3) associated with the light source with a light exit opening (5) for emitting a direct light component of the luminaire, characterized in that the light source is directed at least on two sides by a light-directing device, in particular a light-directing body ( 10), which extends between the light source (1) and the reflector (3) and has a side which is in the direction of emission of the direct light component with respect to the light source (1), the device at least at one to the reflector (3) facing side (12; 72, 76; 80) is translucent and on this translucent side has a refractive structure which affects the beam path of the light source (1) on the reflector (3) incident light. Luminaire according to claim 1, characterized in that the light source (1) is completely or at least partially accommodated in the reflector (3). Luminaire according to Claim 1 or 2, characterized in that the light-directing device has a base (14; 50; 82) lying in the direction of emission of the direct light component with respect to the light source and walls (12; 72,76; 80) angled towards this base. Luminaire according to claim 3, characterized in that the light-directing means comprises a body (10) having in cross-section the shape of a truncated triangle at the top which is open on the base side or on the side opposite the base. Luminaire according to one of claims 3 or 4, characterized in that in a cross-section the line connecting the two end points of the bottom (14; 50; 82) has a tangent to a side wall (12; 72, 76; 80), passing through one of the endpoints, including an angle of 65 ° to 80 °, 140 ° to 160 ° or 110 ° to 130 °. Luminaire according to one of Claims 1 to 5, characterized in that the light-directing device has two mutually opposite sides (12; 72, 76; 80) each facing the reflector (3), the transmission properties of these sides being different. Luminaire according to claim 6, characterized in that one of the two sides (12; 72, 76; 80) is reflective to the inside of the device (10). Luminaire according to one of claims 1 to 5, characterized in that the light-directing device is symmetrical with respect to a plane with regard to its geometry and / or with respect to its optical properties. Luminaire according to claim 8, characterized in that the light source is located in said plane. Luminaire according to one of claims 1 to 9, characterized in that the refractive structure in a cross section limits the light emission on the reflector (3) facing side to a range of angles below a critical angle β to a perpendicular to the side wall such that at least the majority of the light emitted via this side is radiated into the region below this critical angle. Luminaire according to claim 10, characterized in that at each light exit point of the side wall (12; 72, 76; 80) the angle β is defined by the refractive structure such that light rays emerging from the side wall (12) at the angle β, on the reflector (3). Luminaire according to one of claims 1 to 11, characterized in that the refractive structure consists of line-shaped elements which have a constant cross-section in a cross-section perpendicular to the line which follows the element. Luminaire according to claim 12, characterized in that the elements have a cross section tapering from a base side and having two sides adjoining the base side, the sum of the angles passing the tangents to the two sides passing through the end points of the base side , with the base side included, lies in a range of 85 ° to 130 °. Luminaire according to claim 13, characterized in that the cross section has a triangular shape and the base side opposite angle is 90 °. Luminaire according to one of claims 1 to 14, characterized in that a refractive structure is formed on one side of a wall of the light directing means facing away from the light source (1). Luminaire according to one of claims 1 to 15, characterized in that a refractive structure is formed on one side of a wall of the light directing means facing the light source (1). Luminaire according to one of claims 1 to 16, characterized by a device which does not or only partially transmits light which is emitted by the light source (1) in the emission direction of the direct light component. A luminaire according to claim 17, characterized in that a reflective or partially reflective and partially translucent element (40) is disposed between the bottom and the light source or is formed by the bottom (14; 50; 82). Luminaire according to claim 17 or 18, characterized in that an element (40) is arranged between the bottom (14; 52; 82) and the light source, which has a refractive structure which does not or only partly cover the light (14; 50, 82) or by passing transmitted light to a certain angular range to a normal to the light exit surface. A luminaire according to any one of claims 17 to 19, characterized in that the bottom (14; 50; 82) is provided with a refractive structure which does not or only partially transmits light or concentrates transmitted light to a certain angular range to a perpendicular to the light exit surface , Luminaire according to one of claims 1 to 20, characterized in that the light-directing device comprises a light-directing body (10) whose bottom (14; 50) is formed integrally with the side walls. Luminaire according to claim 21, characterized in that the side edge of the bottom (14; 50) and the side walls (12) are each provided with a chamfer which extends only over a part of the thickness so that bottom and side walls are connected by a section of material are. Luminaire according to claim 22, characterized in that the chamfers in the manner of a miter abut each other. Luminaire according to claim 22, characterized in that the chamfers are formed on the same side of the body as the refractive structures in one or more side walls and / or in the floor. Luminaire according to one of claims 3 to 24, characterized in that one or more side walls (72) and / or the bottom have a means for positive retention (74) of one or more plate or foil-shaped elements (76) having a refractive structure , Luminaire according to one of claims 1 to 25, characterized in that the luminaire has an asymmetrical emission characteristic. Luminaire according to one of claims 1 to 25, characterized in that the luminaire has a symmetrical emission characteristic. Luminaire according to one of claims 1 to 27, characterized in that the light-directing device has a bottom portion, which is followed by a cover, which defines a cavity together with the bottom portion. Luminaire according to claim 28, characterized in that the bottom portion is the bottom of a light-directing body. Luminaire according to claim 28 or 29, characterized in that light components are arranged in the cavity. Luminaire according to claim 30, characterized in that the bottom portion has a supporting profile, to which one or more lighting components, which are accommodated in the cavity, are fixed. Luminaire according to one of Claims 1 to 31, characterized in that the reflector (3, 12) has, in addition to the said light exit opening (5), a light outlet surface (30; 122) for emitting an indirect light component of the luminaire. Luminaire according to claim 32, characterized in that the light directing means comprises a light directing body (10) having two opposite side walls and a light exit surface (122) for indirect light emission in the reflector between the two side walls. Luminaire according to claim 32 or 33, characterized in that the light directing means comprises a light directing body (10) and a light exit surface (30) for indirect light emission is outside the region between two opposite side walls of the light directing body.

Images