• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a luminaire (1) with a housing (2) and lamps arranged in the housing (2), the housing (2) having a light exit opening (5) for emitting the light generated by the lamps. According to the invention, the luminaire (1) has a gray filter (10), which is designed and pivoted in such a way that it essentially completely covers the light outlet opening (5) of the luminaire housing (2) in a pivoting position.
    公开号:CH715252A2
    申请号:CH00824/19
    申请日:2019-06-18
    公开日:2020-02-14
    发明作者:Thibaut Escourrou
    申请人:Zumtobel Lighting Gmbh；
    IPC主号:
    专利说明:

    Description: The present invention relates to a lamp according to the preamble of claim 1, which has a housing as well as lamps arranged in the housing, the housing having a light exit opening for emitting the light generated by the lamps and changing or adapting the light output Lamp is desired. The lamp can in particular be a so-called wallwasher.
    Luminaires that are arranged on the ceiling of a room or suspended from a ceiling in an upper area of a room are predominantly designed such that they bring about a symmetrical light emission towards the bottom. Primarily, therefore, the light is emitted vertically downwards, the light distribution with respect to this center being able to be stretched in one direction, for example, but there is in turn symmetry with respect to this center. An exception to this are, for example, spotlights or spots which are oriented in a specific direction of preferred light emission and are used to illuminate certain areas of a room or objects located in the room.
    Another type of luminaire in which an asymmetrical. So-called wallwashers are provided. These are luminaires that are usually arranged on the ceiling of a room, but are not intended to illuminate the floor area of the room below, but primarily serve to illuminate a vertically aligned wall located diagonally below the luminaire. Wall washers of this type are usually designed as recessed or surface-mounted luminaires. They then have a generally horizontally oriented light exit opening, although optical elements positioned within the luminaire housing are designed such that the light is emitted asymmetrically obliquely downwards via the light exit opening. Because of their special light emission characteristics, wallwashers of this type are used very frequently, for example, in museums A because they can be used to illuminate objects on a wall, for example pictures or the like, very efficiently.
    In particular, in the application example of a museum just described, it can often occur that an adjustment of the lighting of a wall is required. This can be the case, for example, when an image on a wall is replaced by a new one which has different dimensions, for example a different height. In this case, it would be an advantage if the option ordered the light distribution across the height of the wall at least to one. Adjust certain degrees. On the other hand, in certain situations it may also be desirable to change the total amount of light directed onto the wall. This case can occur, for example, when the object to be illuminated is replaced by a new one, which changes in terms of its surface properties and / or its color in such a way that overall a reduction or increase in the amount of light directed at the object is desired.
    A change in the total amount of light can be implemented electronically in modern luminaires. But especially in museums or similar. Fields of application where high-quality lighting is sought, electronic adjustment of the light output has not always proven to be advantageous. The reason for this is that when the light sources, which are now predominantly in the form of LEDs, are dimmed, a slight flickering can often occur. This may be barely perceptible to the human eye, but it does have a negative impact on the lighting situation.
    The present invention is therefore based on the object to provide a luminaire in which an adjustment of the light output can take place in the manner described above, without this being primarily influenced electronically on the light output.
    The object is achieved by a lamp which has the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.
    The solution according to the invention is based on the idea of influencing the light output, the luminaire in a classic manner using a so-called “gray filter”, that is to say using a filter which influences all wavelengths of visible light uniformly. According to the invention, the gray filter is designed and pivoted such that it essentially completely covers the light exit opening of the lamp housing in a pivoted position. Because, at the same time, there is the possibility of pivoting the gray filter out of the position covering the light exit opening - as explained in detail below - not only influence the total amount of light emitted, but also the geometric light distribution.
    According to the invention, therefore, a lamp with a housing and arranged in the housing lamps is proposed, the housing having a light exit opening for emitting the light generated by the lamps, and wherein the lamp has a gray filter, which is designed and pivoted, that it essentially completely covers the light outlet opening of the luminaire housing in a swivel position.
    The gray filter is preferably pivotally mounted on an edge region of the light exit opening, the shape of the gray filter preferably corresponding approximately to the shape of the light exit opening. In this case, the light exit opening preferably defines a plane with a perpendicular thereto, the luminaire being designed such that it produces a light emission which is asymmetrical with respect to this vertical. In particular, a preferred direction can be provided for the light emission, with a pivot axis for the gray filter then on that side of the light exit opening
    CH 715 252 A2 is formed, which corresponds to the preferred direction of light emission. The pivot axis of the gray filter is in particular formed parallel to the plane of the light exit opening, preferably in the plane of the light exit opening, and is particularly preferably oriented perpendicular to the preferred direction of light emission.
    The gray filter can be made homogeneous according to a variant of the invention. As an alternative to this, however, it is also possible to use a gray filter that has a gradually changing filter thickness. In particular, it can be provided that the filter thickness decreases continuously starting from a region near the pivot axis.
    The lamp can in particular be a so-called wallwasher. However, the invention is not limited to such a type of light. Even with a luminaire that emits symmetrical light e.g. According to the present invention, a pivotable gray filter could be provided on the light exit opening of the lamp housing.
    In the event that the luminaire is a wallwasher, the illuminants are preferably formed by LEDs, which are arranged such that the main emission direction of the light emission opening of the luminaire is oriented, whereby in particular the LEDs preferably essentially lie in a plane parallel to the plane of the light exit opening. The luminaire then has suitable reflector means which deflect the light from the LEDs for emission via the light exit opening. These reflector means can have a first, diffusely reflecting reflector and a second, mirrored reflector, which together span the LEDs and the light exit opening of the lamp in a dome-like manner. The first reflector is arranged on a side of the LEDs facing away from the light exit opening and is preferably of a flat design. The second reflector, however, is preferably curved in cross section, preferably parabolic, and extends from an edge region of the first reflector to an edge region of the light exit opening facing away from the LEDs. The light output can also be optimized by a second, translucent diffuser which extends from a region between the LEDs and the light exit opening to the transition between the first and the second reflector.
    The invention will be explained in more detail with reference to the accompanying drawing. It shows:
    Figure 1 shows an embodiment of a lamp according to the invention in a perspective view.
    2 shows a sectional illustration of the luminaire according to the invention;
    3 and 4 the inventive according to FIG. 1 with different swivel positions of the gray filter;
    5a to 9b representations of a cross section of the luminaire at different pivoting positions of the gray filter and of the light distribution resulting in each case; and
    Fig. 10 is a lamp according to the prior art.
    The concept according to the invention is explained below using a wall washer. As already mentioned, the idea of using a swiveling gray filter can also be used for other types of luminaires. In this regard, there is no restriction of the inventive concept.
    The wallwasher according to the invention provided with the reference number 1 in FIG. 1 largely corresponds to a wallwasher 101 shown in FIG. 10 and known from the prior art. Both lamps 1, 101 have an approximately cuboid housing 2 or 102, which is shown in FIG Case is designed for ceiling mounting, but could also be realized in the same way as a suspended lamp, but in particular also as a recessed ceiling lamp. Components for generating and influencing light, which are described in more detail below, are located within the housing 2, 102, the light ultimately being emitted via a light exit opening 5, 105 provided on the underside 3 or 103 of the housing 2, 102. 1, this light exit opening 5 is not immediately recognizable, since it is covered by the gray filter 10 according to the invention, which will be described in more detail below. The light exit opening 5, 105 can be designed to be slightly trapezoidal in accordance with the illustrations. However, this is not absolutely necessary and other shapes can also be provided. Ultimately, the shape of the light exit opening 5, 105 can at least to a certain extent also influence the light distribution or the shape of the illuminated area.
    Primarily, however, the distribution of the emitted light is initially determined by the components located within the lamp housing 2, 102 for emitting and influencing the light. These are to be explained in more detail below with reference to the sectional illustration in FIG. 2. A sectional illustration of the lamp 1 from FIG. 1 is shown here, the gray filter not being shown in this illustration. This sectional view thus also corresponds to a section through the luminaire 101 according to FIG. 10 known from the prior art.
    LEDs 20 are used as light sources, which are arranged one behind the other in the longitudinal direction of the lamp housing 2, that is to say perpendicular to the plane of the drawing. The LEDs are positioned on a carrier element, for example an LED circuit board 21, which is aligned parallel to the plane E of the light exit opening 5, but is positioned slightly elevated within the lamp housing 2 compared to this plane E. The LEDs 20 are on the top
    CH 715 252 A2 positioned on the side of the LED board 21, so that the main emission direction H points upward and thus away from the light exit opening 5 of the lamp 1. This alignment of the LEDs 20 has the consequence that the light emitted by the LEDs is influenced by at least one of the optical elements described below. In this way, on the one hand, the light output can be better adjusted in terms of its direction in the desired manner, and at the same time a better mixing of the light emitted by the LEDs 20 is achieved, so that overall a more homogeneous light output is obtained.
    So that the light emitted by the LEDs 20, which is emitted primarily upwards, can leave the light exit opening 5 provided on the underside 3 of the housing 2, at least a reflection of the light is therefore necessary. In the luminaire 1 shown, two reflectors are responsible for this, on the one hand a first reflector 22 and on the other hand a second reflector 23. Overall, both reflectors 22 and 23 form a dome-like structure which spans the LEDs 20 and the light exit opening 5. The first reflector 22 extends from a long side of the LED board 21 flat or straight to the top of the housing 2. It is oriented slightly inclined so that its lower end is on the side of the LEDs 20 facing away from the light exit opening 5, while the upper end is positioned almost centrally above the LEDs 20. This first reflector 22 is preferably made of a diffusely reflecting material and can accordingly be provided, for example, with a highly reflective white coating which causes the scatter. With the aid of this first reflector 22, in particular the light emitted by the LEDs 20 in a direction facing away from the light exit opening 5 is reflected back, the inclination 22 shown resulting in a certain proportion of the light being deliberately emitted obliquely laterally above the light exit opening 5b, to achieve the asymmetrical light emission characteristic of a wallwasher.
    Adjacent to the first reflector 22, the second reflector 23 is provided. This is curved in cross section, for example parabolic, and extends down to the side of the light exit opening 5. According to the illustration, light rays falling on this parabolic reflector 23 are deflected such that they are primarily emitted downwards. In contrast to the diffusely reflecting reflector 22, the second reflector 23 is accordingly mirrored, since here no strong scattering of the light, but a pure reflection is preferred, which enables better control of the light distribution. Finally, the light output of the luminaire 1 is thereby optimized, that in addition a translucent diffuser 24 is provided. This is in turn designed to be inclined and extends from a region between the LEDs 20 and the light exit opening 5 up to the region in which the transition from the first reflector 22 to the second reflector 23 takes place. The scattering of this diffuser 24 leads to the fact that light which does not strike the first reflector 22 and is scattered by the latter is nevertheless scattered before it falls on the second reflector 23. As a result, this light is also scattered or homogenized in such a way that the LEDs 20 can no longer be perceived as individual light sources in the light emitted towards the underside.
    Overall, this results in the visible light emission in FIG. 2, which is typical for a wallwasher. This means that the light is emitted obliquely downwards through the light exit opening 5, the preferred direction V or the direction in which the center of the light emission lies overall, with the normal which corresponds to the normal to the plane E of the light exit opening 5 Includes angle α.
    The design of the optical components just described, with the aid of which the asymmetrical light emission typical of the wallwasher is achieved, has proven itself. In spite of everything, the use of these components is only to be regarded as exemplary and the invention can of course also be used in combination with other optical systems. In particular, as already explained, it is not absolutely necessary for asymmetrical light emission to be present at all.
    It can also be seen that in the exemplary embodiment explained with reference to FIGS. 1 and 2, the angle a can be influenced by the configuration of the optical components, that is to say for example by the inclination of the first reflector 22 and the curvature of the second reflector 23. After the luminaire has been completed, however, these components can no longer be changed - or only with great effort - so that in the case of previously known solutions, the light emission characteristics could no longer be changed by the end user or customer.
    With the help of the present invention, the possibility is now opened to influence the light emission characteristic of the lamp 1 as a whole to a certain degree.
    This is made possible according to the invention with the use of a gray filter 10, which is arranged in the lower region of the lamp housing 2 and is pivotably mounted. Such a gray filter, which is also referred to as a neutral density filter (ND filter), is usually used in photography and is screwed or inserted here in front of the lens of a camera in order to achieve a uniform darkening in the image. A gray filter is characterized by the fact that it is colored neutral gray so that the color rendering is not distorted. Accordingly, it influences all wavelengths - at least visible light - in the same way.
    According to the present invention it is now provided that the gray filter 1-0 is pivotally arranged on the lamp housing 2, the pivot axis S (see Fig. 3) lies in the plane of the light exit opening 5 and perpendicular to the preferred direction V of the light output the lamp 1 is aligned. In particular, in the present case
    CH 715 252 A2 provides that the pivot axis S is provided on that side of the light exit opening 5 in the direction of which the asymmetrical light emission of the wall washer 1 also takes place. This opens up the possibility, starting from the closed position shown in FIG. 1, of pivoting the gray filter 10 out of the plane E of the light exit opening 5. 3 and 4 show further possible pivot positions for the gray filter 10, the possibility of pivoting being restricted to a certain angular range. However, there should preferably be the possibility of pivoting the filter 10 to such an extent that there is almost no influence on the light output in an end position. Ideally, there is the possibility of pivoting the filter 10 by almost up to 180 degrees. The shape of the gray filter 10 should preferably correspond to the shape of the light exit opening 5 such that in the closed position shown in FIG. 1, this opening 5 is completely covered by the filter 10, ideally the shape of the gray filter 10 corresponds exactly to the shape the light exit opening 5 and the pivotable mounting is designed such that in the closed state of the gray filter 10, the light exit opening 5 closes flush with the underside 3 of the lamp housing. It is conceivable both to mount the gray filter 10, in which manual pivoting is provided, and to an embodiment in which the pivoting can be carried out by means of an electric drive.
    The effect of the gray filter will be explained below with reference to FIGS. 5 to 9. The figures here each show sectional representations of the luminaire 1 and the resulting beam path of the light on the one hand and on the other hand the light distribution achieved on a wall located obliquely below the luminaire 1. The situation for different pivoting positions of the filter 10 is shown in each case, so that it can be seen in what way the pivoting of the filter 10 can influence the light emission.
    5a and 5b show, first of all, a situation as shown in FIG. 2. This corresponds to the case that no gray filter 10 is provided at all or that it has been pivoted out of the light exit opening 5 such that it no longer influences the light output of the luminaire 1. In this case, the light emission characteristic purely caused by the optical elements 22 to 24 is then achieved, which produces a light distribution on the wall, as shown in FIG. 5b. The curve I in the left-hand region of FIG. 5b represents in this case represents the light intensity as a function of the height, while the upper curve II shows the change in brightness in a direction perpendicular thereto. As already mentioned, the curves shown in FIG. 5b are typical of a classic wallwasher.
    6 to 9 show the corresponding beam profiles and light distributions in the event that the gray filter 10 is increasingly pivoted in the direction of the light exit opening 5 of the lamp 1.
    6a and 6b show the situation for an angle β of 120 degrees, it being evident that in this position the gray filter 10 influences in particular the light emitted laterally at very flat angles. Since it darkens, this leads to a significant reduction in brightness, particularly in the upper region of the wall: this can be seen in particular in the step-like course of the left curve 1 in FIG. 6b.
    If the gray filter 10 is now increasingly pivoted in the direction of the light exit opening 5, the result is the light influencing which can be seen from FIG. 7 (β = 90 °) and 8 (β = 60 °). The light that is emitted at steeper angles, that is to say increasingly downward, is also increasingly influenced here by the gray filter 10. This means that the overall brightness is reduced overall, but the relative maximum of the lighting moves increasingly upwards. Is then as shown in Fig. 9a and 9b, the gray filter 10 in the closed position (ß = 0 °) and thus completely covers the light exit opening 5 of the lamp 1, the curve I, II corresponds to the light output again the course as shown in Fig. 5b. The light distribution itself is no longer influenced, but the total amount of light is reduced overall.
    Overall, the use of the pivotable gray filter opens up the possibility of influencing the total amount of light on the one hand and influencing the light distribution characteristic on the other hand.
    It should be pointed out here that the example shown was explained using a homogeneously designed gray filter, which therefore has the same filter thickness over its entire surface. However, it would also be conceivable here to make changes or modifications. Filters whose filter strength gradually increases or decreases in a certain direction would also be conceivable. In particular: for the illustrated example of a wall washer, would also offer to design the filter in such a way that it has a greater filter thickness in the area of the pivot axis S than the end opposite the pivot axis. In this way, influence can be exerted even more efficiently, in particular on the loan given at very flat angles.
    权利要求:
    Claims (16)
    [1]
    Claims
    1. Luminaire (1) with a housing (2) and in the housing (2) arranged lamps (20), the housing (2) having a light exit opening (5) for emitting the light generated by the lamps (20), thereby characterized in that the luminaire (1) has a gray filter (10) which is designed and pivoted such that it essentially completely covers the light outlet opening (5) of the luminaire housing (2) in a pivoting position.
    CH 715 252 A2
    [2]
    2. Luminaire according to claim 1, characterized in that the gray filter (10.) is pivotally mounted on an edge region of the light exit opening (5), the shape of the gray filter (10) preferably corresponding to the shape of the light exit opening (5).
    [3]
    3. Luminaire according to claim 1 or 2, characterized in that the light exit opening (5) defines a plane (E) with a perpendicular thereto, the luminaire (1) causing an asymmetrical light emission with respect to this vertical.
    [4]
    4. Luminaire according to claim 3, characterized in that the luminaire (1) causes a light emission in a preferred direction (V), wherein a pivot axis (S) for the gray filter (10) is formed on that side of the light exit opening (5) which the preferred direction (V) corresponds to the light output.
    [5]
    5. Luminaire according to claim 4, characterized in that the pivot axis (S) of the gray filter (10) is parallel to the plane (E) of the light outlet opening (5), preferably in the plane (E) of the light outlet opening (5).
    [6]
    6. Luminaire according to claim 5, characterized in that the swivel axis (S) of the gray filter (10) is substantially perpendicular to the preferred direction (V) of the light output.
    [7]
    7. Luminaire according to one of the preceding claims, characterized in that the gray filter (10) is made substantially homogeneous.
    [8]
    8. Light according to one of claims 1 to 6, characterized in that the gray filter (10) has a gradually changing filter thickness.
    [9]
    9. Luminaire according to claim 8, characterized in that the filter thickness decreases continuously from a region near the pivot axis (S).
    [10]
    10. Luminaire according to one of the preceding claims, characterized in that it is a wallwasher.
    [11]
    11. Luminaire according to claim 10, characterized in that the illuminants (20) are formed by LEDs which are arranged such that the main emission direction (H) of the LEDs from the light emission opening (5) is oriented in a directional manner, the LEDs essentially in a plane (E) parallel to the plane of the light exit opening (5).
    [12]
    12. Luminaire according to claim 11, characterized in that the luminaire (1) has reflector means which deflect the light of the LEDs for emission via the light exit opening (5).
    [13]
    13. Luminaire according to spoke 12, characterized in that the reflector means have a first, diffusely reflecting reflector (22) and a second, mirrored reflector (23) which together span the LEDs and the light exit opening (5) in a dome-like manner.
    [14]
    14. Luminaire according to claim 13, characterized in that the first reflector (22) is arranged on a side of the LEDs facing away from the light exit opening (5), the first reflector (22) preferably being flat.
    [15]
    15. Luminaire according to claim 13 or 14, characterized in that the second reflector (23) is curved in cross section, preferably parabolic and extends from an edge region of the first reflector (22) to an edge region of the light exit opening (5) facing away from the LEDs. above all.
    [16]
    16. Luminaire according to claim 15, characterized in that it further comprises a translucent diffuser (24) which extends from an area between the LEDs and the light exit opening (5) to the transition between the first and the second reflector (22, 23 ) extends
    CH 715 252 A2

    CH 715 252 A2

    CH 715 252 A2
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    法律状态:
    优先权:
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