• 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 an optical element (1) for a lamp which has an elongated, profile-like element (2) which extends along a longitudinal axis, consists of a crystal-clear material and has an essentially U-shaped cross section, so that a first Leg (3), a second leg (4) and a connecting leg (5) connecting the two legs to one another are formed. The connecting leg (5) has a light entry surface (51) on a side opposite the first leg and the second leg. With reference to the U-shape, a diffuser layer (7) is applied to the outer surfaces (6) of the first leg (3) and the second leg (4), which partially scatters and partially reflects the light. With this design, it can be achieved that a light that is radiated into the optical element (1) via the light entry surface (51) is subsequently emitted in a spatially limited manner due to the U-shape, so that the risk of glare is reduced, with the outer surfaces of the legs (3 , 4) advantageously appear moderately lit with respect to the external appearance of the lamp. In this way, a decorative look can be achieved, so to speak. The invention also relates to a corresponding lamp.
    公开号:AT17091U1
    申请号:TGM50246/2018U
    申请日:2018-12-05
    公开日:2021-05-15
    发明作者:
    申请人:Zumtobel Lighting Gmbh；
    IPC主号:
    专利说明:

    description
    OPTICAL ELEMENT FOR A LUMINAIRE, IN PARTICULAR OFFICE LUMINAIRE, AS WELL AS LUMINAIRE
    The invention relates to an optical element for a lamp, which has a profile-like, consisting of a crystal clear material element with a substantially U-shaped cross section. The invention also relates to a lamp with such an optical element.
    An elongated so-called bar light is known from the prior art, which is designed to be attached to an elongated support rail. The bar light has an approximately trapezoidal cross-section, with a fluorescent tube serving as the light source. The luminaire is used to illuminate workplaces in office areas. With such luminaires it is regularly desirable that no undesirable glare occurs at the workplaces and that no unwanted reflections occur on screen surfaces either.
    The invention is based on the object of specifying an optical element for a lamp which is particularly suitable for lighting in office areas, as well as a corresponding lamp.
    [0004] This object is achieved according to the invention with the subjects mentioned in the independent claims. Particular embodiments of the invention are specified in the dependent claims.
    According to the invention, an optical element for a lamp is provided which has an elongate, extending along a longitudinal axis, profile-like element, which consists of a crystal clear material and has a substantially U-shaped cross section, so that a first leg , a second leg and a connecting leg connecting the two legs to one another are formed. The connecting leg has a light entry surface on a side opposite the first leg and the second leg. With reference to the U-shape, a diffuser layer is applied to the outer surfaces of the first leg and the second leg, which diffuser layer partially scatters and partially reflects the light.
    With this design it can be achieved that a light radiated into the optical element via the light entry surface is subsequently given off spatially limited due to the U-shape, so that the risk of glare is reduced, the outer surfaces of the legs advantageously with reference to the external appearance of a corresponding luminaire appear moderately illuminated. In this way, a decorative look can be achieved, so to speak.
    Preferably, the first leg and the second leg are designed to diverge starting from the connecting leg. A particularly suitable area can thus be illuminated directly with the aid of the optical element.
    Preferably, the first leg and the second leg are designed symmetrically with respect to a plane of symmetry extending through the connecting leg. In particular, a symmetrical light output can be achieved in this way.
    Preferably, the first leg and the second leg extend beyond a plane defined by a surface area of the connecting leg by an amount which is at least 2 cm, preferably at least 3 cm, particularly preferably at least 4 cm. This is advantageous with regard to a suitable limitation of the risk of dazzling. The dimension is furthermore preferably no more than 10 cm, in particular no more than 7 cm, particularly preferably no more than 6 cm.
    In terms of production technology, the optical element is advantageously produced in a coextrusion process.
    Preferably, with respect to the U-shape on the inner surfaces of the first leg
    and the second leg each have a semi-reflective coating applied. In this way, the light distribution can advantageously be influenced further.
    According to a further aspect of the invention, a lamp is provided which has a light source for generating a light and an optical element according to the application. The optical element is arranged to influence the light.
    Preferably, the lamp has a base part, which is designed in particular as a profile part, wherein the optical element is arranged held on the base part, in particular via a latching connection or via another conventional connection, such as an adhesive connection or a screw connection. In particular, this enables the light to be designed to be small.
    A cavity for mixing the light is preferably formed between the light source and the connecting leg. This cavity can serve as a mixing chamber in which a certain equalization of the light emitted by the light source is effected. The luminaire preferably also has two reflective elements, by means of which the cavity is delimited on two opposite sides. In this way, particularly good mixing can be achieved.
    A particularly advantageous mounting of the optical element can be achieved if the two reflective elements have latching hooks for holding the optical element.
    Furthermore, the lamp preferably has a prismatic lens which is designed and arranged between the light source and the connecting leg that the light must penetrate the prismatic lens before it strikes the connecting leg. The prismatic lens makes it possible, in particular, to ensure that the light is glare-free when viewed in the longitudinal direction. For this purpose, the prismatic lens preferably has prismatic structures which extend transversely to the longitudinal axis.
    Furthermore, the lamp preferably has a diffuser film which is arranged between the light source and the prismatic lens. This can in particular have the effect that the light emitted by the light source appears particularly uniformly bright. This is particularly advantageous, for example, when the light source consists of individual LEDs (LED: light-emitting diode), so that the light emitted by the light source forms individual light points that appear particularly bright - without any optical interference.
    The invention is explained in more detail below using an exemplary embodiment and with reference to the drawings. Show it:
    Fig. 1 is a perspective sketch of a lamp according to the application, attached to a mounting rail,
    [0020] FIG. 2 shows a perspective sketch of the luminaire separated from the mounting rail, [0021] FIG. 3 shows a cross section through the luminaire and
    4 shows a perspective sketch of an end region of the light attached to the mounting rail.
    Fig. 1 shows a perspective sketch of a lamp according to the application. The luminaire is elongated overall, so that it extends along a longitudinal axis L. The luminaire is preferably designed to be attached to a mounting rail 20 which also extends along the longitudinal axis L. In particular, the mounting rail 20 can have power lines which are used to supply power to the lamp.
    In Fig. 2 a perspective sketch of the lamp separated from the mounting rail 20 is outlined and Fig. 3 shows a cross section through the lamp normal to the longitudinal axis L. Preferably, the lamp has a base part 11, which is for connection to the mounting rail 20 is designed, in particular a releasable latching is provided. From a manufacturing point of view, the base part 11 can advantageously be designed as a sheet metal part, in particular in the form of a profile part.
    The lamp comprises a light source 10 for emitting a light, which is formed in the example shown in the form of several LEDs, which preferably extend in a row along the longitudinal axis L. In the example shown, the light source 10 further comprises a circuit board 19 on which the LEDs are arranged. The circuit board 19 can be arranged, for example, fastened on the base part 11. As further shown, the light source 10 is preferably arranged in such a way that the light from the light source 10 - with reference to the illustration in FIG. 3 - is emitted downwards.
    In order to influence the light emitted by the light source 10, the lamp has an optical element 1. This optical element 1 comprises an elongated, profile-like element 2 which extends along the longitudinal axis L and consists of a crystal-clear material, for example a plastic material; for example, the profile-like element 2 can consist of PMMA (polymethyl methacrylate). In a section normal to the longitudinal axis L, the profile-like element 1 has an essentially U-shaped cross section, so that a first leg 3, a second leg 4 and a connecting leg 5 connecting the two legs 3, 4 to one another are formed. Side walls of the optical element 1 are correspondingly formed by the two legs 3, 4 mentioned.
    In the example shown, it is provided that, for operating the lamp, the optical element 1 is aligned so that the connecting leg 5 is oriented horizontally and the two legs 3, 4 point downwards. This description is based on this orientation relative to the vertical; however, an orientation of the luminaire that deviates from this can generally also be provided for operation.
    The connecting leg 5 has, on a side opposite the first leg 3 and the second leg 4, in this case on its top side, a light entry surface 51 which is used for the entry of the light emitted by the light source 9. The lamp is designed in such a way that the light emitted by the light source 9 enters the optical element 1 through the light entry surface 51 and then at least for the most part passes through the connecting leg 5.
    With reference to the U-shape, a diffuser layer 7 is applied to the outer surfaces 6 of the first leg 3 and the second leg 4.
    The diffuser layers 7 are designed in such a way that they partially scatter and partially reflect light, in particular the light emitted by the light source 9. In this way it can be achieved that a large part of the light passing through the connecting leg 5 is emitted downwards. However, a further part of the light is also emitted laterally at an angle, so that it falls on the side walls formed by the legs 3, 4. Since these are clear, the light component incident there shines through them and hits the respective diffuser layer 7 on the opposite side. Due to the mentioned optical properties of the diffuser layers 7, part of this light is then let through with diffuse scattering, which is also the case leads to the fact that the side walls appear illuminated when looking at the lamp from the outside; a further part is reflected on the diffuser layers 7 and then emitted downwards. In this way, the external appearance of the lamp can be designed advantageously.
    Since the light component directed outward via the diffuser layers 7 is diffuse, part of it is also directed into the upper half-space, so that it can, for example, fall on a ceiling area and thus indirect lighting can be generated.
    In this sense, the diffuser layers 7 are preferably designed so that the proportion of the light impinging from the inside that is allowed through is at least 10% and at most 70%, preferably at least 15% and at most 50%.
    As is the case in the example shown, the first leg 3 and the second leg 4 are preferably designed to diverge from the connecting leg 5. In this way, the light output directed downwards can be appropriately limited. For example, the design can be such that an angle a that the legs 3, 4 enclose with the vertical between
    5 ° and 40 °, preferably between 10 ° and 30 °.
    In particular, the design can be such that the first leg 3 and the second leg 4 are designed symmetrically with respect to a plane of symmetry S running through the connecting leg 5. As a result of the U-shape of the profile-like element 2 resulting in cross-section, a particularly symmetrical trapezoidal shape can thus be established.
    As indicated in Fig. 3, a plane E is defined by a surface area 8 of the connecting leg 5. In particular, this surface area 8 - as sketched by way of example - can be a downwardly facing surface area of the connecting leg 5. In this case, the first leg 3 and the second leg 4 preferably extend by a dimension M beyond this plane E - in this case downwards - which is at least 2 cm, preferably at least 3 cm, particularly preferably at least 4 cm. This dimension M is furthermore preferably at most 10 cm, in particular at most 7 cm, particularly preferably at most 6 cm. The distance between the free end regions of the legs 3, 4 can be, for example, between 8 cm and 10 cm.
    It can be provided that no optically effective element is arranged between the first leg 3 and the second leg 4.
    For example, a coextrusion process is suitable for producing the optical element 1; In this case, in particular, the profile-like element 2 and the two diffuser layers 7 can be extruded together at the same time.
    Preferably, the optical element 1 is arranged held on the base part 11, directly or indirectly. A latching connection is particularly suitable here. In the example shown, the profile-like element 2 has a groove, in particular open towards the inside, on the two edge regions of the connecting leg 5 for this purpose.
    Furthermore, a cavity 12 for mixing the light emitted by the light source 10 is preferably formed between the light source 10 and the connecting leg 5. In this way it can be achieved that the light is mixed in this cavity 12, which represents a mixing chamber, so to speak, so that the homogeneity increases.
    Preferably, the lamp has two reflective elements 13, through which the cavity 12 is limited on two opposite sides. The reflective elements 13 are preferably mounted on the base part 11. In terms of lighting technology, they can advantageously extend as far as the surface of the board 19.
    In particular, the reflective elements 13 can have inwardly curved or convex surfaces with respect to the cavity 12. This is advantageous in terms of the distribution of the light. In the example shown, the reflective elements 13 form lateral boundaries of the cavity 12. At the top, the cavity 12 can be delimited by the light source 10, in particular by the circuit board 19 and the LEDs.
    Furthermore, the two reflective elements 13 preferably have latching hooks 14 for holding the optical element 1. In particular, the latching hooks 14 can engage in the grooves of the profile-like element 2 for this purpose.
    Furthermore, the lamp preferably has a prismatic lens 15 which is designed and arranged between the light source 10 and the connecting leg 5 that the light must penetrate the prismatic lens 15 before it strikes the connecting leg 5. In particular, the prismatic lens 15 can be arranged resting on the connecting leg 5.
    The prismatic disk 15 also preferably has prismatic structures which extend transversely to the longitudinal axis L, in particular in the form of prismatic transverse grooves, for example triangular in section. In this way, in particular, glare reduction of the light can be brought about in the longitudinal direction.
    In the example shown, the lamp further comprises a diffuser film 16, which between
    the light source 10 and the prismatic lens 15 is arranged. In particular, the diffuser film 16 can be arranged resting on the prismatic lens 15. The diffuser film 16 preferably forms a lower delimitation of the cavity 12.
    With the diffuser film 16 it can be achieved that the appearance of the individual LEDs is, so to speak, easily resolved, so that when looking at the connecting leg 5 from below it is practically impossible to see where the individual LEDs are located. It can thus be achieved that the individual LEDs are not recognizable as such and no corresponding narrow, light stripe is recognizable either.
    At the two end regions of the cavity 12, the latter can each be closed by an end cap 21.
    The diffuser film 16 and the prismatic lens 15 thus form a primary optic of the lamp, while the optical element 1 represents a secondary optic.
    The design described enables overall light output to be achieved which is suitable for high-quality light output, in particular in the office area for lighting workplaces. In particular, a UGR value (UGR: unified glare rating) of less than 19 can be achieved, the luminance being less than 3000 cd / m *. On the one hand, it plays a role here that the light entering the side walls is largely reflected again on the diffuser layers 7. On the other hand, the light passing through the diffuser layers 7 is distributed in such a way that there is no risk of excessively high luminance levels occurring at flat angles. In this way, the glare-freeing of the emitted light, which is necessary for lighting office workplaces, is achieved. The size of the side walls in particular also plays a decisive role. A significant shortening of the side walls would, for example, result in undesired higher luminance levels occurring at shallow angles and thus the criteria for high-quality lighting can no longer be achieved. In particular, undesired reflections on screen surfaces can be avoided by the design described.
    If, with reference to the U-shape of the profile-like element 2, a semi-reflective coating is applied to the inner surfaces 9 of the first leg 3 and the second leg 4, an even further advantageous influence on the distribution of the light emitted by the lamp can be achieved become. Such a coating can be produced, for example, after production of the profile-like element 2 by vapor deposition.
    权利要求:
    Claims (10)
    [1]
    1. Optical element (1) for a lamp, having
    - An elongated, profile-like element (2) which extends along a longitudinal axis (L) and which consists of a crystal-clear material and has an essentially U-shaped cross section, so that a first leg (3), a second leg (4) and a connecting leg (5) connecting the two legs (3, 4) to one another are formed,
    wherein the connecting leg (5) on one, the first leg (3) and the second
    Leg (4) opposite side has a light entry surface (51),
    characterized,
    that with respect to the U-shape on the outer surfaces (6) of the first leg (3) and the
    second leg (4) a diffuser layer (7) is applied, the light partially
    scatters and partially reflected.
    [2]
    2. Optical element (1) according to claim 1, characterized in that the first leg (3) and the second leg (4) are designed to diverge starting from the connecting leg (5); and / or that the first leg (3) and the second leg (4) are designed symmetrically with respect to a plane of symmetry (S) running through the connecting leg (5).
    [3]
    3. Optical element (1) according to claim 1 or 2, characterized in that the first leg (3) and the second leg (4) extend over a plane (E) defined by a surface area (8) of the connecting leg (5) Extend beyond a dimension (M) that is at least 2 cm, preferably at least 3
    [4]
    4. Optical element (1) according to one of the preceding claims, characterized in that a semi-reflective coating is applied in each case with reference to the U-shape on the inner surfaces (9) of the first leg (3) and the second leg (4).
    [5]
    5. Lamp, comprising - a light source (10) for generating a light and - an optical element (1) according to one of the preceding claims, wherein the optical element (1) is arranged to influence the light.
    [6]
    6. Light according to claim 5, characterized by - a base part (11), which is preferably designed as a profile part, wherein the optical element (1) is arranged held on the base part (11), preferably via a latching connection or via another conventional connection such as an adhesive connection or a screw connection.
    [7]
    7. Light according to claim 5 or 6, characterized in that a cavity (12) for mixing the light is formed between the light source (10) and the connecting leg (5).
    [8]
    8. Lamp according to claim 7, characterized by - two reflective elements (13), through which the cavity (12) is limited on two opposite sides; and / or - two reflective elements (13) by which the cavity (12) is limited on two opposite sides, the two reflective elements (13) having latching hooks (14) for holding the optical element (1).
    [9]
    9. Light according to one of claims 5 to 8, characterized by - a prismatic disc (15) which is designed and arranged between the light source (10) and the connecting leg (5) that the light must penetrate the prismatic disc (15), before it hits the connecting leg (5).
    [10]
    10. Light according to claim 9, characterized by - a diffuser film (16) which is arranged between the light source (10) and the prismatic lens (15).
    For this purpose 3 sheets of drawings
    类似技术:
    公开号 | 公开日 | 专利标题
    EP2729838B1|2019-11-20|Optical element
    EP1378771B1|2010-10-06|Interior lighting
    EP3839334A1|2021-06-23|Optical element and light emitting arrangement
    WO2005066537A1|2005-07-21|Built-in light
    WO2000011399A1|2000-03-02|Light with a light-guiding element
    EP3283820B1|2021-06-23|Optical system, and assembly for emitting light
    AT17091U1|2021-05-15|Optical element for a lamp, in particular an office lamp, and a lamp
    DE102011107427A1|2013-01-17|Deckenaufhellungsnut
    DE102010001526B4|2016-03-31|Lighting unit with a prism for a vehicle
    DE102006030646A1|2007-10-25|Indoor light for e.g. illuminating wall, has expansion reflector arranged between light source and light discharge opening or after opening based on direction from light source to light discharge opening to reflect light from light source
    EP3112747B1|2018-05-23|Optical element for influencing the light emitted by an extended illumination source
    EP2518389B1|2017-01-04|Longitudinal optical element and assembly for emitting light with optical element
    EP3212997B1|2018-08-29|Optical element and a light-emitting arrangement which comprises an optical element
    DE10354462B4|2014-02-13|Luminaire with asymmetrical light emission
    DE202016100565U1|2017-05-05|Light guide element and light with a light guide element
    DE202019105265U1|2021-01-04|Luminaire with area for flat light emission
    DE202020101683U1|2021-07-01|Luminaire with light source and associated optics
    AT15631U1|2018-03-15|Light guide for influencing a light emitted by LEDs light and arrangement for emitting light with such a light guide and light
    DE202019106804U1|2021-03-09|Optical system for influencing the light output of an elongated light source
    EP1843082B1|2009-09-16|Downlighter in particular for use in a corridor
    DE4312380A1|1994-02-03|Radiation lamp with point or line type light source of high radiation intensity - has reflector partly enclosing light source designed symmetrical to given C90-270-plane of lamp also light outlet opening vertical to this C-plane defined by reflector
    AT17328U1|2021-12-15|Flat LED light
    DE202017107771U1|2018-05-15|Light mixing ladder and luminaire with light mixing conductor
    AT17178U1|2021-08-15|LED light
    DE4225386A1|1992-12-03|Fluorescent lamp lighting unit - has apertured light stop projecting inwards from one side of light exit opening
    同族专利:
    公开号 | 公开日
    DE102018119606A1|2020-02-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1970620A1|2007-03-14|2008-09-17|Koninklijke Philips Electronics N.V.|Illumination device|
    DE102010041478A1|2010-09-27|2012-03-29|Zumtobel Lighting Gmbh|Arrangement for directed light emission|
    WO2015062847A1|2013-11-04|2015-05-07|Koninklijke Philips N.V.|Collimator with improved light mixing and colour mixing properties.|
    DE202016002197U1|2016-04-01|2016-06-06|Osram Gmbh|Direct-emitting LED lamp with anti-glare effect|
    AU6202600A|1999-07-21|2001-02-13|Teledyne Lighting And Display Products, Inc.|Lighting apparatus|
    WO2013105046A1|2012-01-13|2013-07-18|Koninklijke Philips N.V.|Led-based direct-view luminaire with uniform lit appearance|EP3869091A1|2020-02-20|2021-08-25|LTS Licht & Leuchten GmbH|Fastening device for lighting means|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102018119606.7A|DE102018119606A1|2018-08-13|2018-08-13|Optical element for a lamp, in particular office lamp, and lamp|
    [返回顶部]