WO2016012341A1

WO2016012341A1 - Assembly for general lighting and method for controlling such an assembly

Info

Publication number: WO2016012341A1
Application number: PCT/EP2015/066286
Authority: WO
Inventors: Sandra Beecken; Melanie Hagenbring; Manfred Petschulat; Jens Lohse
Original assignee: Zumtobel Lighting Gmbh
Priority date: 2014-07-21
Filing date: 2015-07-16
Publication date: 2016-01-28
Also published as: EP3172483A1; AT15853U1; DE102014214114A1; EP3172483B1

Abstract

The invention relates to an assembly for general lighting, which comprises a first light-generating unit (1) for generating a diffuse light (L1) and a second light-generating unit (2) for generating a light (L2) directed in an emission direction (R). In addition, the assembly comprises means for influencing the second light-generating unit (2). Said means are designed to influence the second light-generating unit (2) in such a way that the emission direction (R) changes in a time-dependent manner. Because the two light-generating units (1, 2) are integrated in an assembly, the outer appearance can be made especially homogeneous and/or inconspicuous. Because of the time-dependent change in the emission direction (R), the lighting can be changed over the course of time. Thus, for example, shadows, which are formed by illuminated objects, and/or light directions can be changed over the course of time. For example, in this way, the lighting situation can be varied in such a way that a changing position of the sun is felt.

Description

Arrangement for general lighting and method for

Control of such

The invention relates to an arrangement for general lighting with a first light generating unit for generating a diffused light and a second light generating unit for generating a directed light.

Furthermore, the invention relates to a method for controlling such an arrangement.

From the prior art, it is known to use a large-area light for the general lighting of a room, which emits diffused light. In addition, spotlights can be installed in order, for example, to additionally illuminate objects in a targeted manner. To achieve a corresponding

Lighting is therefore required to install and set several different lights. This can be one of particular

architectural point of view undesirable appearance of the

Lead lighting arrangement. If a change in the lighting is desired, the lights must also be manipulated accordingly.

The invention has for its object to provide an improved arrangement for general lighting. In particular, the arrangement should be advantageous with respect to the external appearance and advantageous with respect to the lighting properties. Furthermore, a method for controlling such an arrangement is to be specified.

This object is achieved according to the invention with those in the independent

Claims mentioned objects solved. Particular embodiments of the invention are indicated in the dependent claims.

According to the invention is an arrangement for general lighting

provided with a first light generating unit for generating a diffused light, and a second light generating unit for Generation of a light directed in an emission direction. In addition, the arrangement has means for influencing the second light-generating unit. These funds are designed to the second

To influence light generating unit such that the emission direction changes. Preferably, this change can be time-dependent.

By integrating the two light generating units in one

Arrangement can make the external appearance particularly homogeneous or unobtrusive. In particular, this makes it possible to produce a particularly balanced, quiet spatial impression. In addition, the time-dependent change in the emission direction makes it possible for the illumination to change over time. This is possible

For example, shadows that are illuminated by

Objects are formed or change light directions over time. For example, in this way the lighting situation can be varied in such a way that a changing position of the sun is modeled.

The first light-generating unit preferably has a preferably planar and preferably circular light exit surface, via which the diffuse light is emitted, and the second light-generating unit

Light output area over which the directional light is emitted; In this case, the light-emitting region preferably forms a surrounding region of the

Light-emitting surface. By means of a corresponding light exit surface, for example, the impression of a skylight can be created. If the

Light emitting region forms an ambient region of the light exit surface, the directed light can be particularly suitable from different

Place areas, so that particularly suitable results in a changing lighting effect.

Preferably, the second light-generating unit is designed such that the emission direction with a normal of the light exit surface always includes an angle which is greater than 0 °, preferably greater than 10 °.

As a result, the directional light can be emitted asymmetrically, so to speak. If the angle is less than 70 °, preferably less than 6o °, can reduce the risk that a user is dazzled by the directed light.

Preferably, the light emitting area extends annularly around the

Light exit surface around; This is advantageous because in this way the directional light - with a total of large light exit surface - can be delivered from significantly different locations. For this purpose, it is particularly expedient if the light exit surface has a diameter of at least 30 cm, in particular at least 50 cm.

Preferably, the second light-generating unit is configured such that a location area within the light output range, from which the directional light leaves the second light-generating unit, is time-changeable.

This makes it possible to achieve a changing lighting effect particularly suitable.

Preferably, the second light-generating unit has a plurality of light sources, preferably in the form of LEDs (LED: light-emitting diode), which can be switched on and off successively in time by the means for influencing the second light-generating unit. In this way, the location area, from which the directional light leaves the light output area, can be changed particularly suitably in time. Preferably, the lighting means are arranged on a particular closed line, preferably a circular line, in particular equidistantly from each other. In this way, it is possible to create the impression that the location area "migrates" in the course of time, In particular, it can be provided that the means allow the second light-generating unit to be influenced in such a way that the location of the location of the location of the location of the location of the location is increased

Local area moved along the line.

The second light-generating unit preferably has an optical element, for example in the form of a reflector, which is preferably fixed in position is arranged opposite the first light generating unit. As a result, the arrangement can be made particularly suitable structurally simple.

Preferably, the first light generating unit and the second

Light generating unit disposed in a common housing, wherein the housing is preferably intended to be mounted on a ceiling area. This makes it easy to assemble the arrangement; In addition, it makes it suitable in this way with a special

shape even appearance.

According to a further aspect of the invention, a method for

Control of a device for general lighting provided; The arrangement may in particular be an arrangement according to the invention. The method comprises the following steps: (a) activating a first light generation unit to produce a diffused light, (b)

Activating a second light-generating unit for generating a light directed in an emission direction, and the following further step (c) influencing the second light-generating unit in such a way that the

Direction of radiation changed time-dependent. By the time-dependent

Changing the direction of radiation can be achieved that the

Lighting changed over time. For example, in this way the lighting situation can be varied in such a way that a changing position of the sun is modeled.

Preferably during this step (c) the diffused light is emitted constantly in time. As a result, suitable natural lighting conditions can be recreated.

Preferably, the second light-generating unit is influenced such that the location area from which the directional light leaves the light-emitting area moves along said closed line, such that the corresponding round-trip time is more than one minute and less than twelve Hours, preferably more than ten minutes and less than six hours.

The invention is explained in more detail below with reference to an embodiment and with reference to the drawings. Show it:

Fig. L is a schematic cross section through a

Inventive light-emitting arrangement with a first light-generating unit and a second light-generating unit

Light generating unit,

2 is a perspective sketch of the arrangement of obliquely below,

Fig. 3 is a, corresponding to FIG. 2 sketch, wherein a location area is marked, from which the directional light the

Light output area of the second light generation unit leaves,

Fig. 4 is a cross-sectional sketch of a possible structure of

Arrangement,

5 shows a corresponding sketch, wherein exemplary light beams are drawn in, FIG. 6 shows a sketch to illustrate a possible one

Lighting effect that can be achieved by the arrangement and

Fig. 7 is a sketch of an application of several arrangements in a room.

Fig. L shows a schematic cross section through an inventive arrangement for light emission. The arrangement may be, for example to act a ceiling light. In the example shown, the arrangement comprises a housing 6, which is designed to be fastened to a ceiling area of a room to be illuminated. In addition to a ceiling mounting is also a pendulum or installation situation, or even a

Wall mounting possible.

The arrangement comprises a first light generation unit 1 for producing a diffused light Li, and a second light generation unit 2 for generating a light L2 directed in an emission direction R.

The diffused light Li may, for example, be a light with a Lambertian emission characteristic. For this purpose, the first light generating unit 1 may expediently have a preferably plane light exit surface 3, via which the diffused light Li is emitted. In the case of one

Ceiling light is the light exit surface 3 advantageous horizontally oriented, the diffused light Li is discharged down. For example, the light exit surface 3 may be circular. Preferably, the

Light exit surface 3 while relatively large, for example, it may have a diameter of at least 30 cm or at least 50 cm; with "diameter" here is generally the maximum extent of

Light exit surface 3 denotes. In this way, the diffused light Li makes it possible suitably to reproduce a natural, diffused light, as it does

For example, arises in a cloudy sky. By such a diffused light, in particular, no shadows with clear

Shadow boundaries generated.

The directional light L2 is preferably formed by a light beam or a cone of light which extends around the emission direction R and has a correspondingly limited opening angle; In particular, the directional light L2 is limited by a smaller solid angle than the diffused light Li. The directional light L2 is in particular such that it produces distinct shadows or shadows with distinct shadow boundaries by interacting with objects to which it encounters. Preferably, the second light-generating unit 2 has a light-emitting area 4, over which the directional light L2 is emitted, the light-emitting area

preferably forms an ambient region of the light exit surface 3.

Furthermore, the arrangement has means for influencing the second

Light generating unit 2 on. In this case, these means are designed to influence the second light-generating unit 2 such that the

Radiation direction R changed time-dependent. In this way it can be achieved that shadows, which are formed by the directed light L2, change over time. As a result, it is possible for a user of the arrangement to generate a spatial impression or a sense of space which changes over time. By appropriate wandering shadows in particular lighting effects can be reproduced, as they arise from natural sunlight.

Accordingly, a method for driving a corresponding arrangement comprises the following steps: (a) activating the first one

Light generating unit 1 for generating the diffused light Li, (b) activating the second light generating unit 2 for generating the, in the

Direction of emission R directed light L2 and (c) influencing the second light generating unit 2 such that the emission direction R changes over time.

In particular, it is provided that within a period of use of the arrangement both the directional light L2 and the diffused light Li are emitted; while the period of use, for example, be at least 15 minutes, preferably at least one hour.

Advantageously, the design may be such that the emission direction R does not jump back and forth over time or the period of use, but that it changes continuously, in particular relatively slowly. For example, the design may be such that there is an angle Δ which is between the emission direction given at a first time ti R (ti) and the given at a later second time t2

Radiation direction R (t2) is formed, a maximum of 90 ⁰ , when the time period between the first time ti and the second time t2 a

Quarter of an hour or 15 minutes. In addition, it can be provided that the angle Δ is at least 5 ⁰ .

It can also be provided that the directional light L2 is emitted with an intensity which remains constant at least substantially in time.

For example, it may be provided that the intensity of the directional light L2 changes within 15 minutes or within the period of use by less than 50%, preferably by less than 20%.

The effects described are particularly pronounced when the second

Light generating unit 2 is designed such that the emission direction R with a - in the example shown vertically downward - normal N of the light exit surface 3 always includes an angle α which is greater than o °, preferably greater than 10 °. By "always" is to be expressed that the radiation direction R within a period in which it changes by influencing by the means or within the

Period of use at any time with the normal N a

includes corresponding other angle.

As a result, it is possible to produce an asymmetry for the directional light L2. Preferably, the angle α is less than 70 ⁰ , in particular less than 6o °, so that a risk of glare for a user is practically excluded or at least reduced.

In the example shown, the light-emitting region 4 extends annularly around the light-emitting surface 3. In Fig. 2 is a perspective sketch of the arrangement of obliquely below sketched. It can be seen here the circular light exit surface 3 and the light emitting area 4, which is designed in accordance with annular. The light exit surface 3 is thus "central" and relatively large in area. Preferably, the second light-generating unit 2 is further configured such that the directional light L2 is not emitted from the entire light-emitting area 4 at one time, but only from a part or portion thereof. In particular, it may be advantageously provided that the directional light L2 - as indicated in Fig. 3 - the second

Light generating unit 2 leaves only from a location area 41 within the light emitting area 4 from. A particularly suitable

Lighting effect can be achieved when the second

Light generating unit 2 is designed such that this location area 41 within the light emitting area 4 is temporally variable, in particular such that the location area 41 moves over time along a path or a line. In the case of the annular design of the light emission region 4 shown here, it may be advantageously provided that the spatial region 41 moves along a circular line within the light emission region 4. This makes it particularly suitable to "model" a direct illumination by sunlight.

In the sketch of FIG. 1, the emission direction R is represented by an arrow on the right side. On the opposite left side an analogous arrow is sketched, which accordingly symbolizes the emission direction at a different time.

In the case outlined in FIG. 1, the emission direction R is directed outwards with respect to the arrangement or a center of the arrangement.

However, the emission direction can also be directed inwards, as in the example shown in FIG. 3.

Also in the example sketched in FIG. 6, the emission direction R is directed inwards. Here, in order to illustrate a possible lighting effect, a case is shown in which the arrangement is fastened to a (not separately drawn) ceiling of a room and illuminates an object G which is directly below the arrangement, here below the light exit surface 3, for example, located on a master table. The object G thus becomes, over time, the directed light L2

directly illuminated in different directions. Such a situation may be advantageous, for example in a shop, when it comes to the

Item G is an object to be presented accordingly. As indicated, in the example shown, the shadow of the object G formed by the directional light L2 travels in a circle over time. In this way, on the one hand, a good illumination with the diffused light Li and, on the other hand, a targeted optical highlighting of individual details of the object G by the directed light L2 is made possible.

However, the described light output of the arrangement is also advantageous in a case in which there is no object to be specially illuminated below the arrangement, for example when walls of the room are illuminated by the directed light L2 in a time-varying manner. For example, as sketched in FIG. 7; can, but need not, as shown in Fig. 7, a plurality of corresponding arrangements may be provided on the ceiling.

For the control of the arrangement, it may be provided that a corresponding circulation time of the location area 41 moving on a closed line, that is, for example, on the circled line is more than one minute and less than twelve hours, preferably more than ten minutes and less than six hours.

The design is preferably such that the activation of the second light-generating unit 2 takes place automatically. Alternatively or additionally, a manual influencing of the second light generating unit 2 may be provided.

Furthermore, the control can be advantageous in such a way that the diffused light Li from the first light-generating unit 1 (within the

Period of use) is unchanged or constantly delivered.

However, alternatively, it may also be provided that the arrangement is such is designed that the diffused light Li changes in intensity over time, for example, depending on a prevailing in an environment of the arrangement of daylight. It is preferably provided that the diffuse light Li causes a general room lighting, which is modified by the directional light L2.

In Fig. 4 is a cross-sectional sketch of a possible structure of

Arrangement shown. The first light generating unit 1 here has one

Light guide plate 15, wherein the light exit surface 3 by a - here downwardly facing - surface region of the light guide plate 15 is formed. Furthermore, in this example, the first light generating unit 1 as a light source at least one LED 16, preferably a plurality of LEDs 16 which are arranged so that they radiate a light generated by them laterally over a narrow side surface of the light guide plate 15 in the latter. At one, the light exit surface 3 opposite another

Surface area 17 of the light guide plate 15 are preferably

Light outcoupling elements 18 are formed, which deflect the light of the LEDs 16 down so that it at least partially leaves the light guide plate 15 via the light exit surface 3 as the diffused light Li. A corresponding light control is known per se.

Alternatively, the first light generating unit 1 for generating the diffused light Li, for example, have an OLED (OLED: organic LED) or be designed such that the diffused light Li is generated by means of transmitted light.

As further shown in the example shown in FIG. 4, the second light-generating unit 2 can have a plurality of illuminants 11, preferably in the form of at least one LED, in particular of LEDs, which are arranged on a particularly closed line, preferably a circular line, in particular equidistantly from one another , In this case, the design is furthermore preferably such that the means 11 for influencing the second light-generating unit 2 allow the lighting means 11 to be switched on and off in chronological succession. So it can be a sequential one, so to speak Control of the bulbs 11 may be provided such that

At different times, the directional light L2 is emitted in different radiation directions R. This makes it particularly suitable cause the location area 41 - as mentioned above - in time

moved, ie along a line, for example along the said circle "wanders".

Furthermore, the second light-generating unit 2 preferably also has an optical element which serves to influence a light emitted by the light-emitting means 11, for example in the form of a reflector 5. The optical element is preferably fixed in position relative to the first one

Light generating unit 1 is arranged. In the example shown, the reflector 5 according to the arrangement of the light emitting means 11 extends ringfömig.

Alternatively, instead of the reflector 5, for example, a lens arrangement with one or more lenses or the like could be provided.

The light sources 11 are preferably oriented such that they radiate their light mainly in a direction which forms an angle with the surface normal N of the light exit surface 3 that is greater than 90 ^° , preferably greater than 100 ^° . As a result, the risk can be reduced that a user looks directly at a light-emitting surface of the lighting means 11 and is blinded thereby. By the reflector 5, the light of the lighting means 11 can then deflect suitable downwards.

In the example shown, in addition, a shading element 19 is provided, which is arranged in such a way next to the lighting means 11 that when looking at the arrangement from the outside a view of a light-emitting surface of the light emitting means 11 is reliably excluded.

Fig. 5 corresponds to the illustration of FIG. 4, wherein for purposes of illustration some light rays are shown by way of example. In principle, to achieve the desired effect, it is not necessary for the location area 41 to travel in small, overlapping steps, but it may also be provided for it to move in jumps. In such a case, the light emitting area 4 need not be formed annularly closed.

In the example shown, the light emitting area 4 extends around the

Light exit surface 3 of the first light generating unit 1 around. However, this is not mandatory. Alternatively, it may be provided, for example, that the directional light L2 is also emitted via the light exit surface 3. In this way, a particularly homogeneous external appearance of the arrangement can be achieved.

In the example shown, the light-emitting region 4 extends symmetrically with respect to the light-emitting surface 3. However, this is not mandatory. The light-emitting region 4 can in principle also be formed asymmetrically with respect to the light-emitting surface 3.

In the example shown, the light exit surface 3 is circular and also the entire arrangement. However, this is not absolutely necessary, it can also be provided another form, for example, an elliptical, square, rectangular or otherwise polygonal.

In the illustrated reflector 5 is a secondary reflector in principle, however, is also suitable, for example, a direct reflector accordingly.

In the above description, referring to the driving of the two light generating units 1, 2, the means for influencing the second light generating unit 2 is particularly discussed. However, the arrangement preferably also has further means which are designed to influence the first light-generating unit 1, for example such that an intensity of the diffused light Li can be changed. Preferably the design such that the means and the other means can operate independently of each other, so that (within the period of use), the diffused light Li can be basically changed independently of the direct light L2. Furthermore, the means for influencing the second light-generating unit 2 are preferably also configured to change an intensity of the directional light L2. In this way, the intensities of the diffused light Li and the directed light L2 can be suitably coordinated with each other. This also makes it advantageous to create a changing spatial impression.

In the arrangement according to the invention, so to speak, two "optical

Systems "integrated, by the light with different

Abstrahlcharakteristiken be generated, namely the diffused light Li and the directed light L2. This combination creates a balanced spatial impression. In addition, can be influenced and changed by the temporal variability of the directional light L2 this spatial impression.

Due to the variable emission direction R of the directional light L2, not only can an object be selectively illuminated, it is also possible, for example, to respond to changing furnishing of the room.

By integrating the two light generating units within an array, one can achieve a clear, uninterrupted

Appearance of a typical diffuse surface light consists. It can be a quiet ceiling effect, since only one arrangement must be planned. In addition, a surprise effect can be generated by changing the impression of space quickly.

Claims

Expectations

Arrangement for general lighting, comprising

- a first light generating unit (l) for generating a diffuse light (Li),

- a second light generating unit (2) for generating a light (L2) directed in a radiation direction (R),

- Means for influencing the second light generating unit (2), characterized in that

that the means are designed to influence the second light generating unit (2) in such a way that the radiation direction (R)

changed depending on time.

Arrangement according to claim 1,

in which the first light generating unit (1) has a preferably flat and preferably circular light exit surface (3) via which the diffuse light (Li) is emitted and the second light generating unit (2) has a light emission area (4) via which the directed light ( L2) is emitted, the light emission area (4) preferably forming a surrounding area of the light exit surface (3).

Arrangement according to claim 2,

in which the second light generating unit (2) is designed such that the emission direction (R) always encloses an angle (a) with a normal (N) of the light exit surface (3) that is greater than 0°, preferably greater than io°.

Arrangement according to claim 3,

in which the angle (a) is less than 70 ⁰ , preferably less than 6o°.

Arrangement according to one of claims 2 to 4,

in which the light emission area (4) is in a ring around the

Light exit surface (3) extends around, the light exit surface (3) preferably having a diameter of at least 30 cm, in particular at least 50 cm.

Arrangement according to one of claims 2 to 5,

in which the second light generation unit (2) is designed such that a location area (41) within the light emission area (4), from which the directed light (L2) leaves the second light generation unit (2), can be changed over time.

Arrangement according to one of the preceding claims,

in which the second light generating unit (2) has several lamps

(11), preferably in the form of LEDs, which are provided by the means for

Influencing the second light generating unit (2) over time

can be switched on and off one after the other.

Arrangement according to claim 7,

in which the lighting means (1) are arranged on a particularly closed line, preferably a circular line, in particular equidistant from one another.

Arrangement with the features mentioned in claims 6 and 8, in which the second light generating unit (2) can be influenced by the means in such a way that the local area (41) moves along the line.

Arrangement according to one of the preceding claims,

in which the second light generating unit (2) has an optical element, for example a reflector (5), which is preferably arranged in a fixed position relative to the first light generating unit (1). Arrangement according to one of the preceding claims,

in which the first light generating unit (l) and the second

Light generating unit (2) are arranged in a common housing (6), the housing (6) preferably being intended to be mounted on a ceiling area.

12. Method for controlling an arrangement for general lighting, in particular according to one of the preceding claims,

comprising the following steps:

(a) activating a first light generating unit (1) to generate a diffuse light (Li),

(b) activating a second light generating unit (2) to generate a light (L2) directed in an emission direction (R),

marked by

the following further step

(c) influencing the second light generating unit (2) in such a way that the emission direction (R) changes as a function of time.

Method according to claim 12,

in which during step (c) the diffuse light (Li) is emitted at a constant time.

Method according to claim 12 or 13,

wherein the arrangement has the features mentioned in claim 9, in which the second light generating unit (2) is influenced in such a way that the local area (41) moves along the closed line, such that the corresponding rotation time is more than one minute and less than twelve Hours, preferably more than ten minutes and less than six hours.