EP1275898A2 - Indoor luminaire with variable indirect lighting - Google Patents

Abstract

The device has at least one lamp (9) that emits light directly via a light output surface and a device for outputting an indirect light component with at least one adjustable element (52). In a first setting the device provides indirect light output. In at least one further setting it causes different characteristics of the indirect light or wholly or partly suppresses output of an indirect light component.

Description

The invention relates to interior lights that emit an indirect light component and have a device consisting of one or more elements with which one Indirect light emission can be limited, especially indoor lights where Light at least one lamp is coupled into a hollow light guide and via a light refractive Device coupled out of the light pipe for exit at a light exit surface becomes.

Such a lamp is for example from German patent application 100 11 378.8 known. However, this luminaire only emits a fixed amount of indirect light. To the To change the indirect component of the luminaire, parts of the housing and / or the reflective part Walls of the light pipe are replaced.

It is the object of the invention to create a possibility for different lighting tasks to be easier and cheaper to implement for interiors.

This object is achieved according to the invention by an interior light with at least a lamp which emits light directly through a light exit surface and a device for emitting an indirect light component, which is characterized in that the device for emitting an indirect light component has at least one adjustable device which, at least in a first setting, the delivery of an indirect Permitted light portion of the lamp and causes in at least one other setting that the indirect light component emitted by the luminaire has different properties than in the first Setting has and / or completely or partially suppressed the emission of an indirect light component becomes.

Said adjustable device can be an element whose optical effect in the Beam path of the indirect light component is variable. While currently under consideration drawn embodiment mechanically movable elements, such as movable reflectors or the like can be considered, can also be provided according to the invention be that the adjustable element is an element whose optical properties are changeable are. For example, the element could be an LCD element that is between an translucent and a non-translucent state is switched.

The invention can provide that the adjustable device is a mechanically adjustable Has element that is set up so that in a first position a translucent Area in a wall of the luminaire released to allow indirect light to escape and by adjusting the element that is available for the passage of light The area of this translucent area is changed or this area is closed can.

It can be provided that the adjustable device has a first component which one or more translucent areas, e.g. Openings for light to pass through for decoupling an indirect light component and a displaceable on the first component has mounted second component, which has opaque sections, that with one or more translucent areas in the first component entirely or can be partially covered, such that by moving the second Compared to the first component, the one available for the passage of light The area of the translucent areas can be changed.

It can be provided that the translucent areas in the first component the second component is closed in a specific position of the second component.

It can further be provided that the second component has translucent areas, which with translucent areas of the first component completely or partially to cover can be brought, preferably such that the second component in a certain Position the translucent sections of the first component for a light exit completely releases.

It can also be provided that the translucent areas in the second component are smaller than the translucent areas in the first component, in which case the translucent areas in the second component the maximum size for the exit of an indirect portion of light available areas.

The invention can provide that the adjustable device has a first component, compared to which a second component is displaceable such that a space between the first and second component, through which light for emitting an indirect light component can emerge, enlarged, reduced and / or closed by moving the second component can be.

It can be provided that the second component compared to the first component in one linear movement is shiftable.

It can be provided that the second component compared to the first component by a Swivel movement is displaceable.

The invention can provide that the adjustable device is a reflective element which has the beam path of the indirect light component at least in one position influenced, with this reflective element being shifted to a second position can, in which at least part of the indirectly emitted light by the reflective Element is directed in a direction other than in the first position or the delivery of a indirect light component is suppressed.

The adjustable device can be continuously adjustable.

The invention can provide that the lamp has a spatial area that at least is partially limited by reflective walls or wall sections, with one or more Lamps are arranged outside this area and light in this area inject.

The luminaire according to the invention can have at least one hollow light guide with a cavity, one or more lamps which are arranged outside the hollow light guide and which Coupling light into the cavity of the light pipe, and at least one light decoupling device with a refractive structure for coupling light out of the light pipe to have a light exit surface.

The light decoupling device can include at least one translucent element have an interface between two media with a different refractive index, which is provided with a refractive structure which is in at least one plane perpendicular to the light exit surface, a light radiation above a critical angle essentially prevents such that in this plane a shielding on the light exit surface emerging light is brought about.

It can be provided that in a roof wall of said area or on the edge This space area openings are provided, which through a below or above the slider can be completely or partially closed.

The invention can provide that said space at one of the light exit opening opposite side is delimited by a roof mirror, at least part of the Roof mirror is pivotable about an axis parallel to a lamp axis, such that that the size of a gap between this movable part and another light part, through which light can emerge to generate an indirect light component, changed becomes.

It can be provided that the pivot axis of the movable part of the roof mirror so is placed that this part can be pivoted into a position in the light of the lamp falls on the upper side of this part facing away from said space area.

The invention can provide that a part surrounding the lamp has a linear or has pivotally displaceable section which is arranged such that by a Relocation of this part, an opening for the passage of light from the lamp opened, closed or can be changed.

The invention can provide that the displaceable part is adjacent to a roof mirror, which the space area of the light pipe on the opposite of the light exit opening Side limited, and is so linearly or pivotally displaceable that a space be opened, closed or changed between the roof mirror and this part can.

The invention can provide that the part surrounding the lamp translucent sections has and means for reducing, increasing and / or preventing the Has light passage through these translucent sections.

The invention can provide that the device has a displaceable element with which the translucent sections are completely or partially covered by moving can.

It can be provided that said further lighting part surrounds the lamp Is part, in particular a coupling reflector, which is at least one facing the lamp has reflective surface, which according to a particular embodiment at least one axis can be pivoted parallel to the lamp longitudinal axis.

In an alternative embodiment it can be provided that the said area of space one side opposite the light exit opening is delimited by a roof mirror is, with at least one further light part, in particular a coupling reflector, around a Axis is pivotable parallel to a lamp axis, such that the size of a Gap between the other part of the lamp and the roof mirror, through which light to Generation of an indirect light component can emerge, is changed. In particular, can be provided that a coupling reflector pivots overall about such an axis or that part of a coupling reflector, e.g. that of the light exit surface part facing away from such an axis can be pivoted.

The invention can also provide that a part of the roof mirror against another Part of the lamp in a linear movement substantially perpendicular to the lamp axis can be shifted such that the size of one adjoining the further lighting part Gap through which light can emit to emit an indirect light component, be changed by this linear displacement and preferably the gap is closed or can be covered or opened.

In a special embodiment it can be provided that the further part of the Part of the roof mirror facing the light consists of two components, which by a linear guide are interconnected so that one of the two parts opposite the others can be shifted linearly to change the size of said gap.

It can also be provided that the movable part of the roof mirror with another Luminaire part, in particular a housing part or a coupling reflector, to the system can be brought such that at least a light emission in the border area of these two parts is essentially prevented.

It can also be provided in one embodiment with a fixed roof mirror be that the movable further light part, e.g. a housing part or a coupling reflector, can be moved towards the roof mirror and brought into contact with it, such that a light emission at least essentially in the border area of these two parts is prevented. It can also be provided that both part of the roof mirror and the other part of the lamp is movable against each other and brought into contact with each other can be.

It can also be provided that a displaceable part of the roof mirror is a first, the said area facing surface and a second of said area has facing away surface, these two surfaces with each other a different from 0 ° Include angles. The surfaces can be both flat and curved surfaces Surfaces, whereby the two surfaces do not have to have the same shape.

Said angle can in particular be an acute angle. For special embodiments however, an obtuse angle can also be selected.

According to the invention, the two surfaces can be substantially parallel to an axis Lamp longitudinal axis to be pivotable against each other, such that the angle between them both surfaces can be changed. According to an alternative embodiment can be provided that the two surfaces enclose a fixed angle to each other and pivoted together about an axis substantially parallel to the longitudinal axis of the lamp can be.

According to the preferred embodiments, at least one of the two said surfaces is reflective; however, both are preferably designed to be reflective.

According to one embodiment, the roof mirror can be independently, e.g. B. in a linear movement or a swiveling movement, parts that can be displaced relative to one another exhibit.

According to a special embodiment, the roof mirror has two independently of one another halves pivotable about a common pivot axis.

The invention can also be a reflecting or refractive element in the beam path provide the indirect light component, its orientation to the incident light in such a way can be changed by changing the orientation of the light in different Areas is directed.

The invention can provide that by the adjustable device, the color of the indirect Light component emerging light can be changed.

According to the invention, a lamp is provided in which the properties of the indirect light component on site according to the requirements or wishes of the user can be adjusted. Unlike the state of the art, where, if not a complete new production of a lamp with other requirements anyway the indirect light component was required, at least parts of the luminaire construction replaced had to be a variable element of the luminaire construction according to the invention adjusted. Accordingly, end users can also do so according to their needs set the indirect light component.

Fig. 1

zeigt einen schematischen Querschnitt einer erfindungsgemäßen Leuchte,

Fig. 2

zeigt einen schematischen teilweisen Querschnitt von zwei erfindungsgemäß zur Lichtauskopplung verwendeten Prismenplatten senkrecht zu der Längsrichtung der Prismen einer ersten Prismenplatte,

Fig. 3

zeigt in einem schematischen teilweisen Querschnitt, senkrecht zu dem Schnitt der Fig. 2, die beiden Prismenplatten gemäß Fig. 2,

Fig. 4

zeigt in einer schematischen Teilansicht eine Einrichtung zur Erzeugung eines variablen indirekten Anteils gemäß einer ersten Ausführungsform der Erfindung,

Fig. 4a

zeigt eine vergrößerte Teilansicht der Fig. 4,

Fig. 5

zeigt schematisch eine weitere Ausführungsform einer erfindungsgemäßen Einrichtung zum Variieren eines indirekten Lichtanteils,

Fig. 6

zeigt schematisch den Bereich der indirekten Lichtauskoppelung einer weiteren Ausführungsform einer erfindungsgemäßen Leuchte,

Fig. 7

zeigt schematisch eine weitere Ausfuhrungsform einer erfindungsgemäßen Leuchte, und

Fig. 8

zeigt schematisch eine weitere Ausführungsform einer erfindungsgemäßen Leuchte,

Fig. 9

zeigt schematisch eine asymmetrische Ausführungsform einer erfindungsgemäßen Leuchte.

Further features and advantages of the invention will become apparent from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings.

Fig. 1

shows a schematic cross section of a lamp according to the invention,

Fig. 2

shows a schematic partial cross section of two prism plates used according to the invention for coupling out light perpendicular to the longitudinal direction of the prisms of a first prism plate,

Fig. 3

2 shows the two prismatic plates according to FIG. 2 in a schematic partial cross section, perpendicular to the section in FIG. 2,

Fig. 4

shows a schematic partial view of a device for generating a variable indirect component according to a first embodiment of the invention,

Fig. 4a

shows an enlarged partial view of Fig. 4,

Fig. 5

schematically shows a further embodiment of a device according to the invention for varying an indirect light component,

Fig. 6

schematically shows the area of indirect light decoupling of a further embodiment of a luminaire according to the invention,

Fig. 7

schematically shows a further embodiment of a lamp according to the invention, and

Fig. 8

schematically shows a further embodiment of a lamp according to the invention,

Fig. 9

shows schematically an asymmetrical embodiment of a lamp according to the invention.

1 shows an example of an embodiment of a lamp according to the invention. This lamp has a housing generally designated 1, in which a generally 3 designated hollow light guide is arranged. The hollow light guide 3 consists of a reflective Roof wall 5 with two halves 5a and 15 inclined at an obtuse angle 5b, reflective end walls (not shown) on the two end faces and one Light decoupling device 7, which will be described in more detail below. The end walls, the roof wall 5 and the light decoupling device 7 together form a cavity 8 reflective walls.

The hollow light guide 3 is open on each of the two narrow sides. On these open narrow sides a lamp 9 (shown only on one side) is arranged adjacent, which directly or indirectly, via a coupling reflector 11, couples light into the light guide 3.

The housing 1 consists of an upper housing half 13 to which the roof wall 5 is attached is, and one of the hollow light guide and the light outcoupling device 7 from below Sidebar 15, which holds the light decoupling device on the light pipe. On the upper housing part 13, a ballast 17 is attached, which is in the area extends above the light guide 3, in which the two roof halves 5a and 5b a reduced Have a distance to the light decoupling device 7 and accordingly above of the light guide 3 define an enlarged area in the housing, so that overall a relatively low overall height can be achieved.

The light decoupling device consists of a carrier plate 20 on which two pairs of prism plates 22 and 24 arranged one above the other are arranged. The carrier plate forms in the case of this lamp, the light exit surface 29. The prismatic plates are on a base surface provided with a prism structure which shields the light coupling device emerging light generated and which is explained in more detail below becomes.

The prism plates 22 and 24 are provided with a structure which essentially prevents coupling out of light above a critical angle to the perpendicular to the light exit surface in certain planes and thereby shields, ie a lowering of the mean luminance of the light exit surface below a limit value, for example 200 cd / m ² , 500 cd / m ² or 1000 cd / m ² , as required by the applicable standards or standard proposals. The critical angle can be in a range from 40 ° to 85 °, preferably 50 ° to 65 °, for example 50 °, 55 °, 60 °, 65 ° or 70 °.

The prism plate 24 has a structure on its side facing away from the cavity 8 of parallel prisms 30, which have a cross section perpendicular to their longitudinal axis have a triangular shape, as can be seen from FIG. 2. Fig. 2 shows that the Prisms directly adjoin one another, ridges 32a evenly spaced from one another, 32b, ... (hereinafter collectively referred to as 32) and by uniformly from one another spaced depressions 34a, 34b, ..., hereinafter collectively designated 34, from each other are separated. The depressions 34 and the ridges 32 form on top of the cavity 8 opposite side of the plate 24 straight parallel lines.

The shield can e.g. generated by total reflection in the prisms. Light in the Prisms become an optically thinner medium, e.g. Air, fully reflected back into the prisms if the angle of incidence is greater than the angle is the total reflection. Accordingly, the exit angle is based on the interfaces of prisms, limited. The side walls of the prisms between the ridges 32 and the depressions 34, however, are inclined to the light exit surface, so that the limitation of the light exit angle due to the critical angle of the total reflection, not necessarily a shield means. A possible criterion for shielding can be derived by that for beam paths in the prisms up to a predetermined maximum number k (e.g. k = 1, 2, 3 or 4) of internal reflections in the prisms before light emerges from the structure the exit angle with respect to a normal to the base of the refractive The maximum structure is equal to the shielding angle. Other screening mechanisms or screening criteria can also be used as an alternative or in addition.

It has been shown that for prisms with a cross section in the form of an isosceles triangle, good shielding is achieved if the following relations exist between the shielding angle C and the prism angle w for an interface with air: w / 2 ≤ C w ≥ 2 (2 arcsin (1 / n) + 90) / 3 tan (w / 2) ≤ (n sin (arcsin (1 / n) - 3 w / 2) + cos (w / 2)) / (n cos (arcsin (1 / n) - 3 w / 2) + sin (w / 2)), where n is the refractive index of plate 24.

In the currently preferred embodiments, the prism angle w is at a refractive index from 1.49 in the range from 90 ° to 130 °, particularly preferably in the range from 110 ° up to 128 °.

Instead of the triangular prisms shown in FIG. 3, other prism shapes can also be used be used.

The prism plate 22 is like the plate 24 with a structure of parallel rectilinear prisms 36, which have burrs 38a, 38b, ... (hereinafter referred to collectively as 38) and by depressions 39a, 39b, ... (hereinafter referred to as 39) from one another are separated. Like the prisms 30, the prisms 36 produce in the direction transverse to a shield in its longitudinal direction, in particular fulfilling relations (1) to (3) could be. As can be seen from FIGS. 2 and 3, the longitudinal direction of the prisms is 30 perpendicular to the longitudinal direction of the prisms 36. The prism plates 18 and 20 produce therefore together a shield in mutually perpendicular planes that are perpendicular to the Light exit surface 3 stand. The shielding angle C can differ in these two levels his. Accordingly, prisms 30 and 36 can have a different prism angle w. For the sake of completeness, it should be noted that the shown Prisms also have a shield in planes between the two planes perpendicular to that can produce respective longitudinal direction. The same can be said for other prism shapes be valid.

As can be seen in FIG. 1, the prism plates 22 and 24 are through on their outer sides frame elements 40 running all around are held on the carrier plate 20. The frame element 40 has a central section 44, at which flanges 46 and Connect 48 at right angles, pointing in opposite directions. The flange 48 is glued to the plate 20. The flange 46 engages over the plates 22 and 24 and holds them thereby positively on the carrier plate 20. A total of four frame elements 40 form one Frame for the two plates 22 and 24, which holds them on the support plate 20. The Carrier plate 20, prism plates 22 and 24 and frame elements 40 form a prefabricated one Unit, which is inserted into the opening of the light guide 3 and through the side strips 15 is held on the light guide. The plates and the associated prism structures are correct by the frame 40 and the fixation on the support plate 20 aligned with each other.

Some of the light from the lamp 9 or the coupling reflector 11 falls directly on the Plate 22 a. Part of this light passes through the plates 22 and 24 and on the Light exit surface 29. Another part of the light is reflected on the plate 22. The The roof wall 5 reflects this directly on the lamp 9 or the coupling reflector 11 incident light and the light reflected back to it from the plate 22 down to the Light decoupling device 7.

The degree of light decoupling on the prism plate 22 depends, among other things, on the angle of incidence of the incident light rays. It has been shown that there is a more uniform Luminous intensity distribution curve of the lamp can be reached when the reflective roof wall is inclined to the light decoupling device and the distance between the light decoupling device and the roof wall is reduced towards away from the lamp. In particular the light intensity distribution curve in the range of 0 ° is thereby evened out and on Avoided or reduced the minimum light intensity distribution in this area. It has it has also been shown that such a design improves the lighting efficiency leads. Therefore, the roof wall 5 consists of two straight, inclined to each other Sections 5a and 5b, which are arranged so that the height of the cavity 8 in the middle is smallest and largest at the radially outer edge.

The housing 1 with a sequence of trapezoidal openings 50 is located above the lamp 9 provided, which are arranged in a row parallel to the lamp axis. Below the range this trapezoidal openings is, as can be seen from FIGS. 1 and 4, a Slider 52 is provided, which also has trapezoidal openings 54, which with the trapezoidal openings 50 are made to coincide by moving the slide 52 can be so that the openings 52 are completely exposed. The openings 54 are shown in broken lines in FIG. 4 insofar as they are not visible through the openings 50 are. By actuating the slide 52, the openings 50 and 54 can be against each other are displaced so that, as shown in Fig. 4, only a portion of the openings 50 to Exit of the light from the lamp 9 is available. The openings are in an end position 50 completely closed by the slide 52, i.e. the openings 54 are located in the area between the openings 50. To actuate the slide 52 is a Handle element 56 is provided, with which the slide 52 parallel to the longitudinal axis of the lamp 9 can be moved. By actuating the slider 52, the light intensity of the the openings 50 passing through light changes and thus the light intensity distribution curve of the indirect component of the luminaire can be changed. Instead of a trapezoidal shape, the Openings 50 and 52 also have a different shape, for example a triangular shape. In Fig. 4 is an example of another form of the openings with the openings 50 'and 54' are in the housing or in the slide 52, indicated. The openings 50 'and 54 'have the shape of a truncated triangle with a rectangle or parallelogram at the top is scheduled. This form is again for the clarification for the opening 50 'shown enlarged in Fig. 4a.

5 shows an alternative embodiment of a lamp according to the invention. At this In the embodiment, the roof reflector 60 has two on the side facing the lamp 9 against each other linearly displaceable elements 60a and 60b by means of a linear guide 62 are interconnected. The part 60a forms with respect to this linear movement the fixed part. By moving the part 60b in the guide 62 relative to the Part 60a can now between the coupling reflector and the roof reflector 60 above Lamp 9 generated a gap through which light is coupled out as an indirect light component can be. The two parts 60a and 60b are part of the roof wall 5 and form one Half of the sloping roof wall similar to element 5a in Fig. 1. It can be in a training of the illustrated embodiment, it can be provided that the two parts 60a and 60b can be pivoted about an axis parallel to the lamp axis, so that even when part 60b is fully extended, in a pivoted position of the two Parts a gap between the coupling reflector 11 and the roof reflector 60 remains, the Size on the one hand by pivoting the two parts 60a and 60b together on the other hand changed by the linear displacement of the parts 60a and 60b against each other can be. There is preferably a pivoting position of the two parts 60a and 60b, in which the part 60b in a correspondingly extended position on the coupling reflector 11 is present and thus prevents the emergence of an indirect light component above the lamp 9.

6 shows a further possible embodiment of the area of the luminaire for indirect light radiation. A short, flat metal sheet 70 is attached to the coupling reflector 11 and is essentially parallel to the underside of the housing. Between the sheet 70 and the roof wall 72 there is a gap 74 which extends over the entire length of the lamp 9 and through which an indirect light component emerges. The roof wall 72 can be pivoted about an axis parallel to the longitudinal axis of the lamp 9, so that this roof wall 72 can be set differently with respect to the lamp and the sheet metal 70. At different angles of attack, the proportion of light which is coupled into the interior of the light guide changes and the proportion which is emitted as an indirect component. A larger angle of attack with respect to the horizontal can, for example, result in a larger proportion of the light which runs in the light guide towards the lamp 9 shown in FIG. 6 being coupled out of the light guide via the gap 70. If the free end of the roof wall 72 is below the level of the metal sheet 70, an increase in the angle of attack causes the gap between the metal sheet 70 and the roof wall 72 and thus also the radiated indirect light component to become smaller. Additionally or alternatively, it can also be provided that one, several or all walls of the coupling reflector and / or the plate 70 can be pivoted about an axis parallel to the lamp axis through the points D ₁ , D ₂ or D ₃ , which expands the possibilities to influence indirect light.

The metal sheet 70 does not necessarily have to be attached to the coupling reflector 11. It can also be a housing part or part of the coupling reflector.

FIG. 7 shows an embodiment of a luminaire according to the invention similar to that according to the embodiment according to FIG. 6. Also here is a roof wall with two reflecting roof wall halves 80a and 80b about an axis parallel to the longitudinal axis of the lamp 9 through a point D ₂₁ in the middle the roof wall can be swiveled. However, this fulcrum is now set so that the roof wall halves 80a and 80b can be pivoted so far down that light can fall on their upper side or exit through the gap between the coupling reflector 11 and the roof wall half 80a or 80b. The top side of the roof wall half 80a is expediently designed to be reflective, as is the bottom side, which faces the hollow space of the hollow light guide. In the position shown in FIG. 7, the roof wall 80 thus serves as a beam splitter, which divides the light emitted by the lamp 9 or reflected by the coupling reflector 11 into a direct light component and an indirect light component. The width of the roof half 80a can be dimensioned such that it ends at a suitable angular position with the free end 84 of the coupling reflector 11 or only a narrow gap remains between these two elements in this angular position, through which only an insignificant indirect light component passes. The embodiment according to FIG. 7 can also be used as shown in FIG. 6, that is to say in such a way that the free end of the roof wall half 80a or 80b lies above the free end of the coupling reflector 84.

In a development of this embodiment, the free end of the coupling reflector 11 and the free end of the pivotable roof wall half 80a or 80b can be designed to be elastically deformable, the width of the roof wall half 80a or 80b being greater than the distance between the point D ₂₁ and the free end 84 of the coupling reflector. The roof wall half 80a or 80b can therefore be brought into contact with the coupling reflector 11 on the side facing the lamp 9, so that the side of the luminaire facing away from the light decoupling device is closed in a light-tight manner. Since the ends of the roof wall half 80a or 80b and a coupling reflector 11 are elastically deformable, it is possible to rotate the roof wall half while deforming these ends on the coupling reflector 11 from this stop position in the direction away from the light decoupling device, so that a position similar 6, in which the free end of the roof wall half 80a or 80b lies above the free end of the coupling reflector 84. In this embodiment, the luminaire can be set up by adjusting the roof wall halves 80a and 80b so that it emits no indirect light. To emit an indirect light component, the roof wall halves 80a and 80b can then be adjusted on the one hand so that, as shown in FIG. 7, they serve as beam splitters for the light emitted by the lamps 9, and on the other hand so that they essentially, such as shown in Fig. 6, serve as a geometric limitation of the indirect light component and as a light-directing element for the light running in the cavity.

8 shows a further embodiment of a luminaire according to the invention, in which the roof wall 90, which delimits the cavity of the light guide, can be pivoted independently of one another about a central axis through the point D ₃₁ parallel to the longitudinal axis of the lamps 9, this pivot axis simultaneously forming the dividing line forms for the two halves 90a and 90b. At the end of the roof wall halves 90a and 90b facing the lamps 9 a second reflector surface 92a or 92b is attached, which encloses an acute angle with the associated roof wall half 90a or 90b and whose free end points towards the center of the lamp, so that approximately in total a diamond shape is created. A gap is provided between the free end of the coupling reflector 94 and the reflector surfaces 92a and 92b, through which the light from the lamps 9 is emitted in order to couple out an indirect light component. The width of this gap can be changed by pivoting the roof wall halves 90a or 90b about the axis of rotation through the point D ₃₁ . The reflector surfaces 92a and 92b are set up such that light from the lamps 9 is reflected on them at least for certain inclinations of the roof wall halves 90a and 90b. This can influence the directional dependence of the light intensity distribution curve of the indirect light component. However, it can also be provided that the surfaces 92a and 92b in turn can be pivoted about the end adjoining the roof wall halves 90a and 90b, that is to say about axes parallel to the longitudinal axis of the lamps 9 and through the points D ₃₂ and D ₃₃ . By pivoting the roof wall halves 90a and 90b, essentially the amount of light emerging as an indirect light component can be influenced, while pivoting around the points D ₃₂ and D _{33 influences} the directional dependence of the decoupled indirect light component.

8, the reflector surfaces 92a and 92b end at a certain distance from one another. In the space between these two reflector halves above the roof wall halves A ballast 96 is attached to 90a and 90b. This arrangement is advantageous to a to achieve low overall height of the lamp. The ballast can, however, also on one elsewhere. In this case it can also be provided that the reflector surfaces 92a and 92b at their ends facing away from the roof wall halves 90a and 90b bump into each other in a certain position or swivel with one another are connected so that a total of one body through the surfaces 90a, 90b, 92a and 92b a rhombic cross section is formed, the four surfaces pivoted against each other can be.

FIG. 9 shows an asymmetrical embodiment of the lamp according to FIG. 8. A pivot axis is provided here at the end of the light guide opposite the lamp 9, approximately at the level of the light decoupling device 7. The pivot axis is parallel to the longitudinal axis of the lamps 9 and passes through point D ₄₁ . The roof wall of the hollow light guide 100 is arranged at an acute angle to the light decoupling device 7, so that the hollow light guide assumes a wedge shape overall. The angle to the light decoupling device is variable by pivoting about an axis parallel to the lamp axis through point D ₄₁ . A reflector surface 102, which encloses an acute angle with the roof wall 100, is attached to the roof wall 100 at the end facing the lamp 9. Between the roof wall 100 and the coupling reflector 11 there is a gap, at least for certain angular positions, through which light from the lamp 9 can emerge upwards as an indirect light component. The light emitted by the lamp 9 as an indirect light component is reflected, depending on the angle between the roof wall 100 and the reflector surface 102. It can also be provided here that the reflector surface 102 can be pivoted about the end at which it is connected to the roof wall 100, so that the directional dependence of the light intensity distribution of the indirect light component can be influenced. It can also be provided here that the roof wall 100 closes with the coupling reflector 11 in a certain angular position.

Various modifications of the previously described embodiments of the invention Luminaires are conceivable and possible. An asymmetrical design, as in 9, can also be provided in the embodiments according to FIGS. 1 to 8. Likewise, in the embodiments according to FIG. 4 or 5 at the side end the roof wall 5 or 60 an angled reflector surface, similar to the walls 92a and 92b and 102 in the embodiments of FIGS. 8 and 9, which are indirect Light component that through the openings 52 (Fig. 4) or through the gap between the displaceable part 60b of the roof reflector and the coupling reflector (FIG. 5) emerges in redirects a desired direction. A corresponding reflector plate could, for example 4 on the side of the openings facing away from the roof wall 5 50 or on the opposite side of the openings facing the roof wall 5 to be available. In the embodiment of FIG. 5, a corresponding reflector could be used for example to the coupling reflector 11 or to the fixed part 60b of the Roof reflector 60 can be attached. In the embodiments in which a reflector surface is attached to a roof wall, as in the embodiments of FIGS. 8 and 9 (Roof wall half 90 / roof wall 100 and reflector surface 92a or 102), the angle between the reflector surface and the roof wall instead of an acute angle, as in the Drawings shown can also be an obtuse angle. Such an obtuse angle between the reflector surface and the roof wall can e.g. make sense if that's the lamp adjacent end of the roof wall lies above the coupling reflector and through it formed gap emerges light from the light pipe.

In a modification of the illustrated and described embodiment, a indirect light component can be coupled out via the coupling reflector. For example be provided that the coupling reflector on the side facing away from the light guide Side has perforations; through which light can exit and which may be by a slide, similar to that shown in Fig. 4, can be closed. It can also be provided be that the coupling reflector has a section which is parallel to an axis Lamp axis, for example about one of the axes D1, D2 or D3 in Fig. 6, so pivotable is that by pivoting this part, a gap on that facing away from the light guide Side of the lamp is opened by the light to couple out a direct or indirect light can escape. An indirect light component does not necessarily have to upwards, but can e.g. with a ceiling lamp, also released laterally become.

The foregoing description, the claims and the drawings disclosed feature The invention can be used both individually and in any combination for implementation of the invention in its various embodiments.

LIST OF REFERENCE NUMBERS

1

casing

3

Light Pipes

5

roof wall

5a, 5b

Roof wall halves

7

light output

8th

Cavity of the light guide

9

lamp

11

Einkoppelreflektor

13

upper case half

15

sidebar

17

ballast

20

support plate

22

prism plate

24

prism plate

29

Light-emitting surface

30

prism

32, 32a, 32b

Prismengrat

34, 34a, 34b

prism depression

36

prism

38, 38a, 38b

Prismengrat

39, 39a, 39b

prism depression

40

frame element

44

central section of the frame element

46

flange

48

flange

50, 50 '

opening

52

pusher

54, 54 '

Opening the slide

56

handle element

60

top reflector

60a

fixed_section of the roof reflector

60b

movable_section of the roof reflector

70

metal sheet

72

roof wall

74

gap

80a, 80b

Roof panel half

84

free end of the coupling reflector

90

roof wall

90a, 90b

Roof wall halves

92a, 92b

reflector surface

94

Einkoppelreflektor

96

ballast

100

roof wall

102

reflector surface

Claims (29)

Interior light with at least one lamp (9) which emits light directly via a light exit surface (29) and has a device for emitting an indirect proportion of light,
characterized in that the device for emitting an indirect light component has at least one adjustable device (52; 60a, 60b; 72; 80a, 80b; 90a, 90b; 100) which, at least in a first setting, permits the emission of an indirect light component of the luminaire and in at least one further setting causes the indirect light component emitted by the luminaire to have different properties than in the first setting and / or the emission of an indirect light component is completely or partially suppressed. Luminaire according to claim 1, characterized in that the adjustable device has a mechanically adjustable element (52) which is set up in such a way that in a first position a translucent area (50) in a wall of the luminaire is released for the exit of an indirect light component and by adjusting the element (52), the area of this translucent area (50) available for the passage of light can be changed and / or this area can be closed. Luminaire according to claim 2, characterized in that the adjustable device has a first component which has one or more translucent areas (50) for the passage of light for coupling out an indirect light component, and a second component (52) which is displaceably mounted on the first component which has opaque sections which can be made to coincide with one or more translucent areas (50) in the first component in whole or in part, such that by moving the second component (52) relative to the first component, those for the light passage to Available area of the translucent areas can be changed. Luminaire according to claim 3, characterized in that the second component has translucent areas (54) which can be made completely or partially coincident with translucent areas (50) of the first component. Luminaire according to one of claims 1 to 4, characterized in that the adjustable device has a first component (60a; 70), against which a second component (60b; 72; 90a, 90b; 100) can be displaced such that an intermediate space ( 66; 74) between the first and second component, through which light can emit an indirect light component, can be enlarged, reduced and / or closed by moving the second component (60b; 72; 90a, 90b; 100). Luminaire according to claim 5, characterized in that the second component (60b) can be displaced in a linear movement relative to the first component (60a). Luminaire according to claim 5 or 6, characterized in that the second component (72; 90a, 90b; 100) can be displaced relative to the first component by a pivoting movement. Luminaire according to one of claims 1 to 7, characterized in that the adjustable device has a reflective element (80a, 80b; 92a, 92b; 102) which influences the beam path of the indirect light component at least in one position, this reflective element at least in a second position can be shifted, in which at least some of the indirectly emitted light is directed by the reflecting element in a different direction than in the first position or the emission of an indirect light component is suppressed. Luminaire according to one of claims 1 to 8, characterized in that the adjustable device is continuously adjustable. Luminaire according to one of claims 1 to 9, characterized in that it has a room area which is at least partially delimited by reflecting walls or wall sections (5, 5a, 5b), one or more lamps (9) outside this room area (8) are arranged and couple light into this area. Luminaire according to claim 10, characterized in that it has at least one hollow light guide (3) with a cavity (8), one or more lamps (9) which are arranged outside the hollow light guide and which couple light into the cavity (8) of the hollow light guide, and has at least one light decoupling device (7) with a light refractive structure (30, 36) for decoupling light from the hollow light guide to a light exit surface. Luminaire according to claim 11, characterized in that the light decoupling device has at least one translucent element (22, 24) with an interface between two media with a different refractive index, which is provided with a light-refracting structure (30, 36) which is in at least one plane perpendicular to the light exit surface substantially prevents light radiation above a critical angle, in such a way that the light emerging from the light exit surface is shielded in this plane. Luminaire according to one of claims 10 to 12, characterized in that openings (50) are provided in a roof wall of said room area (8) or at the edge of this room area, which openings are made entirely or partially by a slide (52) arranged below or above the roof wall can be closed. Luminaire according to one of claims 10 to 13, characterized in that said space area (8) is delimited to a side opposite the light exit opening by a roof mirror (72; 80a, 80b; 90a, 90b; 100), at least part of the roof mirror can be pivoted about an axis parallel to a lamp longitudinal axis in such a way that the size of a gap (74) between this movable part and a further luminaire part (11; 70) through which light can emerge to produce an indirect light component is changed. Luminaire according to claim 14, characterized in that the pivot axis of the movable part of the roof mirror (80a, 80b; 90a, 90b) is positioned so that this part can be pivoted into a position in which the light of the lamp is directed towards said area opposite top of this part falls. Luminaire according to one of claims 14 or 15, characterized in that said further luminaire part is a part (11) surrounding the lamp which has at least one reflecting surface facing the lamp (9). Luminaire according to one of claims 10 to 16, characterized in that a part (11) surrounding the lamp has a linearly or pivotally displaceable section which is arranged in such a way that an opening for the passage of light from the lamp is opened by a displacement of this part, can be closed or changed. Luminaire according to claim 17, characterized in that the displaceable part is adjacent to a roof mirror which delimits the spatial area (8) of the hollow light guide on the side opposite the light exit opening, and is displaceable linearly or pivotably in such a way that an intermediate space between the roof mirror and this part can be opened, closed or changed. Luminaire according to one of claims 17 or 18, characterized in that the part (11) surrounding the lamp has translucent sections and has a device for reducing, enlarging and / or preventing the passage of light through these translucent sections. Luminaire according to claim 19, characterized in that the device has a displaceable element with which the translucent sections can be covered in whole or in part by moving. Luminaire according to one of claims 17 to 20, characterized in that the part (11) surrounding the lamp is a coupling reflector which surrounds the lamp (9). Luminaire according to one of claims 10 to 21, characterized in that a part (60b) of the roof mirror (60) can be displaced relative to a further part of the luminaire (11) in a linear movement substantially perpendicular to the longitudinal axis of the lamp such that the size a gap adjoining the further luminaire part (11), through which light can emit an indirect light component, is changed by this linear displacement. Luminaire according to one of claims 14 to 22, characterized in that the movable part of the roof mirror can be brought into contact with the further luminaire part in such a way that light emission in the border area of these two parts is at least substantially prevented. Luminaire according to one of claims 14 to 23, characterized in that a displaceable part of the roof mirror has a first surface (90a, 90b; 100) facing the said room area (8) and a second surface (92a, 92b facing away from the said room area) ; 102), these two surfaces enclosing an angle different from 0 °. Luminaire according to claim 24, characterized in that the two surfaces (90a, 90b; 92a, 92b; 100; 102) can be pivoted relative to one another about an axis substantially parallel to the longitudinal axis of the lamp, such that the angle between these two surfaces can be changed , Luminaire according to one of claims 14 to 25, characterized in that the roof mirror has a plurality of parts which can be displaced relative to one another (90a, 90b; 92a, 92b; 100, 102). Luminaire according to one of claims 14 to 26, characterized in that the roof mirror has two halves (80a, 80b; 90a, 90b) which can be pivoted independently of one another about a common pivot axis. Light according to one of claims 1 to 27, characterized by a reflective or refractive element in the beam path of the indirect light component, whose orientation can be changed to the incident light such that thereby the light is directed into different spatial regions. Luminaire according to one of claims 1 to 28, characterized in that the color of the light emerging as an indirect light component can be changed by the adjustable device.

Images