• 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 system for influencing a light emitted by an LED light source. The optical system has a lens for influencing the light, and a pot-like reflector, whose shape defines a major axis. The reflector has inwardly facing reflective surface areas and forms with respect to the main axis on a first side of a light exit opening. In this case, the lens is arranged on a first side opposite the second side of the reflector, in such a way that the light after leaving the lens travels a path to the light exit opening and then leaves through the latter through the reflector. The optical system is designed such that the light on the path between the lens and the light exit opening is for the most part not reflected on the reflective surface areas of the reflector and is only reflected to a further, smaller part at the reflective surface areas of the reflector. This design makes it possible, in particular, for the appearance of light that can be produced by a luminaire with such an optical system to show no or at most only reduced unwanted hard shadow edges. Nevertheless, a minimum screen angle for the light output can be guaranteed. Also, the reflector can influence the light distribution.
    公开号:AT15121U1
    申请号:TGM422/2013U
    申请日:2013-12-04
    公开日:2017-01-15
    发明作者:Dipl Ing Gassner Patrik；Dipl Ing Hagenbring Melanie
    申请人:Zumtobel Lighting Gmbh；
    IPC主号:
    专利说明:

    description
    OPTICAL SYSTEM FOR A LED LIGHT SOURCE AND LUMINAIRE WITH A SOLOCH OPTICAL SYSTEM
    The invention relates to an optical system for influencing a light emitted by an LED light source (LED: light emitting diode) comprising a lens and a cup-shaped reflector. Furthermore, the invention relates to a luminaire with such an optical system.
    From the prior art, a grid lamp is known, in which the light generated by a light source or more light sources of the lamp light is emitted through the grid in an outer space of the lamp; the grid is formed by a plurality of cup-shaped reflectors arranged in one plane. For a user of such a luminaire is in practice essential, which light appearance can be generated with the lamp on a surface, such as a work surface. Such a light appearance is generally perceived as more or less pleasant.
    The invention has for its object to provide an improved optical system for influencing a, emitted by an LED light source light, and a corresponding light. In particular, the system or the luminaire should be suitable for producing a particularly appealing light appearance.
    This object is achieved according to the invention with the objects mentioned in the independent claims. Particular embodiments of the invention are specified in the dependent claims.
    According to the invention, an optical system for influencing a light emitted by an LED light source is provided. The optical system has a lens for influencing the light, and a pot-like reflector, whose shape defines a major axis. The reflector has inwardly facing reflective surface areas and forms with respect to the main axis on a first side of a light exit opening. In this case, the lens is arranged on a, the first side opposite the second side of the reflector, in such a way that the light after leaving the lens travels a path to the light outlet opening and then leaves through the latter through the reflector. The optical system is designed in such a way that the light on the path between the lens and the light exit opening is to a predominant part not reflected on the reflective Flächenbe-rich of the reflector and reflected only to a further, smaller part of the reflective surface areas of the reflector becomes.
    In this way it can be achieved that the light output of the optical system is primarily or mainly determined by the lens. The influence of the reflector is thus reduced accordingly; In connection with the generation of the light appearance, this design can be used to avoid the formation of undesired hard shadow edges or at least significantly reduce them. Nevertheless, a minimum screen angle for the light output can be guaranteed. Also, the reflector can influence the light distribution in the form of a "fine tuning".
    Preferably, the predominant part is at least 80%, in particular at least 90%. The further smaller part is preferably between 1% and 9%, in particular between 3% and 7%. In this way, particularly good results can be achieved.
    The reflector is preferably arranged such that the reflective surface areas partially surround the lens in an annular manner. In this way, it is possible to achieve that light portions emerging laterally from the lens can be particularly suitably influenced with the corresponding area coverage of the reflector.
    [0009] The reflective surface areas of the reflector are preferably diffusely reflecting or scattering. In this way, formation of hard shadow edges can be particularly effectively reduced or avoided. Advantageously, the reflective surface areas of the reflector can be white for this purpose.
    Alternatively, however, the reflective surface areas of the reflector can also be designed mirror-reflecting. As a result, a further improved deblending can be achieved.
    Depending on the way in which the reflector is to influence the light emission, so different materials for the reflector can be used or the reflective properties can be realized in different ways. Flerstellungstechnisch advantageous the reflective surface areas of the reflector are formed by a coating; For example, they can be formed by a - usually high gloss - paint or a - usually rather frosted - powder coating.
    Preferably, the reflector is designed so that in a section through the main axis of the reflective surface areas describe a bell shape or a trapezoidal shape. This makes it possible to effect a particularly suitable influencing of the light distribution through the reflector.
    Preferably, the reflector is rotationally symmetrical with respect to the main axis; alternatively, in a cross section normal to the major axis, it may have a square, or generally a rectangular or elliptical shape.
    The lens is preferably made of a clear material, such as plastic or glass. This is particularly advantageous with respect to the lighting efficiency of the lamp.
    Preferably, the optical system is designed so that - viewed in a section through the main axis - a lens contacting tangent, which is placed on the opposite side of the main axis through the edge point of the light exit opening, with the main axis encloses an angle maximum 60 °. This design makes it particularly suitable to realize a minimum screen angle.
    Preferably, the optical system is designed such that - viewed in a section through the main axis - the extension of the lens normal to the main axis is at least 35% of the extent of the light exit opening, in particular at least 40%. In this way, can be particularly suitable effect that the light influencing through the lens a correspondingly high proportion of the influence of the entire system on the light comes.
    According to a further aspect of the invention, a luminaire is provided which has an LED light source and an optical system according to the invention. Particularly suitable, the lamp is designed as a ceiling light, especially as a task light. Preferably, a light exit opening of the luminaire is described by the light exit opening of the reflector. This is advantageous with respect to the lighting efficiency of the lamp.
    The invention is explained in more detail below with reference to an exemplary embodiment and with reference to the drawings. 1 shows a cross-sectional sketch of an optical system according to the invention, [0020] FIG. 2 shows sketches of two different design possibilities of the optical system, [0021] FIG. 3 shows a sketch corresponding to FIG Clarification of the achievement of a
    [0022] FIG. 4a shows a sketch of a possible attainable luminance distribution in the case of a bell-shaped reflector, and [0023] FIG. 4b shows a corresponding sketch in the case of a cone-shaped reflector.
    Fig. 1 shows a cross-sectional sketch of an optical system according to the invention. The optical system is designed to influence a light generated by an LED light source 1. The system comprises a lens 2 for influencing the light and a cup-shaped reflector 3.
    The reflector 3 is designed so that a major axis A is determined by its shape. The reflector 3 extends around this major axis A and has inwardly facing reflective surface areas 31. Preferably, the entire, with respect to the main axis A inwardly facing surface region of the reflector 3 is formed exclusively by the reflective surface portions 31.
    The extent of the reflector 3 along the main axis A is referred to here as the height H of the reflector 3.
    With reference to the main axis A, a light exit opening 4 is formed on a first side by the reflector 3. In this description, it is assumed that the reflector 3 is oriented so that the main axis A is vertical and the first side facing downward, so the light exit opening 4 faces downward. However, in principle, the optical system may also be designed to be otherwise aligned with the vertical for operation. The directions etc. in the present description are to be interpreted accordingly in such a case.
    As indicated in Fig. 2, below, the reflector 3, for example, with respect to the main axis A be rotationally symmetrical Or - as in Fig. 2, indicated above - in a cross section normal to the main axis A a polygonal, for example square Have shape.
    The lens 2 is arranged on a, the first side opposite the second side of the reflector 3 and the top of the reflector 3. The design is such that the light after leaving the lens 2 travels a path to the light exit opening 4 and then leaves the reflector 3 through the latter. In particular, the lens 2 may be arranged passing through the main axis A.
    In the example shown, the reflector 3 is arranged such that the reflective surface areas 31 partially surround the lens 2 in a ring-like manner along a section h of the main axis A. This section h can in particular correspond to the extent of the lens 2 parallel to the main axis A. , With regard to the dimensioning, it can be provided, for example, that the following relation holds: 0.1 H <h <0.5 H, preferably 0.2 H <h <0.3 H.
    The reflector 3 may have at its, pointing to the second side and upper end portion an opening into which the lens 2 is inserted. Preferably, the design is such that the lens 2 is disposed directly adjacent to the reflective surface portions 31 of the reflector 3.
    Furthermore, the reflector 3 can be designed such that - viewed in a section through the main axis A - the extension d of the lens 2 is normal to the major axis A wenigs-least 35% of the extent D of the light exit opening 4, preferably at least 40th %. In this way, it can be achieved particularly suitably that that surface area of the lens 2, beyond which the light leaves the lens, is comparatively large. As a result, a particularly suitable light influencing is possible; In addition, in this way the risk of a potential glare of a viewer can be reduced by a very high local luminance.
    A luminaire according to the invention comprises, in addition to the optical system, the LED light source 1. The LED light source 1 may comprise an LED or a plurality of LEDs, in particular arranged in a cluster. In this case, the LEDs can be arranged, for example on a circuit board, in such a way that they pass through a plane oriented normal to the main axis A.
    The lamp can be designed as an interior light. The luminaire can be designed, for example, as a ceiling light or as a floor lamp and, in particular, can be used to illuminate a substantially horizontal working surface, that is to say be configured as a workstation luminaire. On this work surface can be produced with the light emitted by the light a particularly suitable and pleasant-looking light appearance.
    The luminaire may also have a plurality of corresponding optical systems and a plurality of corresponding LED light sources, wherein each of the LED light sources is associated with one of the optical systems. In particular, the luminaire can be designed such that the reflectors of the optical systems are arranged in one plane and form a grid arrangement. Preferably, the optical systems are designed to be identical. The LED light sources can be designed identical. It can be further provided in this case that the lamp is aligned for operation in such a way that the reflectors are arranged through a horizontal plane durchset-Zend and a light output of the lamp by the grid arrangement is down.
    Preferably, the design of the lamp is such that a light exit opening of the lamp is described by the light exit opening 4 and optionally by the light exit openings. In this way, it can be avoided that the light after passing through the light exit opening 4 is influenced by further luminaire components.
    The optical system is preferably arranged relative to the LED light source 1 so that the light generated and emitted by the LED light source 1 is radiated from above into the lens 2, the lens 2 passes through and the latter through and down leaves on the sides facing surface areas of the lens 2 again. As already mentioned, the light then sets after its exit from the lens 2 a path to the light exit opening 4 of the reflector 3 back. In this case, the light comprises-as is indicated by way of example in FIG. 1 with a first light beam L1-first light beams which are reflected or scattered in this way on the reflective surface regions 31 of the reflector 3, and-as is shown by way of example in FIG a second light beam L2 indicated - second light beams, which are not reflected in this way at the reflective surface portions 31 of the reflector 3.
    The optical system is designed such that the light on the way between the lens 2 and the light exit opening 4 to a predominant part is not reflected at the reflective surface portions 31 of the reflector 3 and only to a further, smaller part of the reflective Surface regions 31 of the reflector 3 is reflected or scattered. If, as shown by way of example in FIG. 1, the light is represented on its path between the lens 2 and the light exit opening 4 by light rays, in such a way that the density of the light rays represents a measure of the intensity of the light, then there is a corresponding problem more second light beams L2 and fewer first light beams L1. In other words, in particular the terms "predominant part" and "further, smaller part" may refer to the intensity of the light.
    For example, it can be provided that the majority is at least 80%, preferably at least 90%. The further, smaller part may for example be between 1% and 9%, preferably between 3% and 7%.
    By this design can be achieved that the light distribution caused by the optical system is determined primarily by the lens 2. The reflector 3, on the other hand, has a minor influence on this.
    In order to realize a correspondingly large influence of the lens 2, it is preferably provided that the lens 2 is made of a clear material. For example, the lens 2 may be made of plastic or glass. By using a clear material can also be avoided that there is a significant scattering of light in the lens 2.
    Nevertheless, with the reflector 3, the following three effects can be achieved with particular advantage with respect to the light distribution: By appropriate shaping of the reflector 3 and the lens 2, a minimum screening angle can be suitably used, as schematically indicated in FIG ß of the optical system, which can avoid unwanted potential glare of an observer. For this purpose, the design is preferably such that viewed in a section through the main axis A, a tangent t touching the lens 2, which is placed on the opposite side of the main axis A through the edge point r of the light exit opening 4, with the main axis A includes an angle α which is at most 90 ° -β. If the minimum screening angle β is, for example, at least 30 °, for example in accordance with the established standard, the optical system is preferably geometrically designed so that the angle a is at most 60 °.
    By the reflector 3 can continue to cause that in the appearance of light, which can be generated with the light emitted by a corresponding lamp light - for example, on a correspondingly illuminated work surface - hard shadows are avoided or at least significantly reduced. This can be achieved in particular by the fact that the part of the light striking the reflective surface areas 31 of the reflector 3, ie the further, smaller part of the light at the surface areas 31, is slightly scattered, ie diffusely reflected. Accordingly, the surface areas 31 are preferably designed to be diffusely reflecting or scattering, and in particular the area areas 31 may be white. Manufacturing technology advantageous reflector 3 may be made of a white material.
    The said effect can be achieved in particular also in the case of a luminaire according to the invention, which has the above-mentioned grid arrangement. In this case, there is basically the probability that edges are formed by multi-slats; These can be avoided by the inventive design accordingly or at least reduce.
    The reflector 3 may for example consist of plastic or a painted or otherwise coated material or be made. In particular, the reflective surfaces 31 may be formed by a coating, such as by a paint or a powder coating.
    In the first place, the light distribution is thus effected by the lens 2; however, by the reflector 3, a "fine-tuning" of the light distribution can be effected, in particular by appropriate shaping of the reflector 3. As shown in FIG. 1 and also in FIG. 4a, left exemplarily sketched, the reflector 3 can be designed, for example, that in a section through the main axis A, the reflective surface areas 31 describe a bell shape. As sketched on the left in FIG. 4b, alternatively, the shaping may, for example, be such that the reflective surface regions 31 in this case describe a trapezoidal shape; Overall, in this case, therefore, the surface regions 31 can describe a conical section shape. In a cross section normal to the main axis A, the reflector may for example have a quadratic, rectangular or elliptical shape, in particular also a circular shape. The corresponding influences on the light distribution curve are accordingly shown in FIGS. 4a, right and 4b, right. While a bell shape leads to the formation of a slightly pronounced double-winged "Batwing distribution", in the case of the trapezoidal or conical section-shaped design, in comparison, the double-winged expression is weaker. It is then directed more light in the area between the two "wings".
    Also, for example, by appropriate shaping of the reflector 3, the scattered light can be easily reduced above 65 ° in order to reduce luminance.
    As stated above, the reflector 3 can be designed so that the light is diffusely reflected or scattered at the reflective surface areas 31. However, it is alternatively also possible for the surface areas 31 to have a mirror-like reflection. In this way, a further improved glare reduction can optionally be achieved or even more influence can be exerted on the characteristic of the radiation.
    With reference to a joint effect of the lens 2 and the reflector 3, it should finally be noted that in principle the lens 2 should be the clearer, the more diffuse the reflector 3 acts. However, if the lens 2 itself has certain scattering properties, for example as a result of incorporated scattering particles, the reflector 3 should accordingly be designed to be less diffuse-acting.
    权利要求:
    Claims (15)
    [1]
    claims
    1. An optical system for influencing a light emitted by an LED light source (1), comprising - a lens (2) for influencing the light and - a pot-like reflector (3) whose shape defines a major axis (A), wherein the reflector (3) has inwardly facing reflecting surface areas (31) and with respect to the main axis (A) on a first side forms a Lichtaustrittsöff- (4), wherein the lens (2) on one first side opposite the second side of the re-reflector (3) is arranged, such that the light after leaving the lens (2) travels a path to the light exit opening (4) and then through the latter through the reflector (3), thereby characterized in that the optical system is designed such that the light on the way between the lens (2) and the light exit opening (4) to a predominant part not at the Reflek-tierenden surface areas (31) of the reflector (3) refl is ektiert and only to a further, smaller part of the reflective surface areas (31) of the reflector (3) is reflected.
    [2]
    2. An optical system according to claim 1, wherein the majority is at least 80%, preferably at least 90%.
    [3]
    3. An optical system according to claim 1 or 2, wherein the further smaller part is between 1% and 9%, preferably between 3% and 7%.
    [4]
    4. Optical system according to one of the preceding claims, in which the reflector (3) is arranged such that the reflective surface regions (31) partially surround the lens (2) like a ring.
    [5]
    5. An optical system according to any one of the preceding claims, wherein the reflective surface areas (31) of the reflector (3) are diffusely reflective or mirror-reflecting.
    [6]
    6. Optical system according to one of the preceding Anspriiche, wherein the reflective surface areas (31) of the reflector (3) are white.
    [7]
    7. Optical system according to one of the preceding claims, wherein the reflective surface areas (31) of the reflector (3) are formed by a coating, in particular by a coating or a powder coating.
    [8]
    8. Optical system according to one of the preceding Anspriiche, wherein the reflector (3) is designed so that in a section through the main axis (A) the reflective surface areas (31) be-write a bell shape or a trapezoidal shape.
    [9]
    9. Optical system according to one of the preceding Anspriiche, wherein the reflector (3) with respect to the main axis (A) is rotationally symmetrical or in a cross-section normal to the main axis (A) has a square, rectangular or elliptical shape.
    [10]
    10. Optical system according to one of the preceding claims, wherein the lens (2) consists of a clear material, in particular of plastic or glass.
    [11]
    11. Optical system according to one of the preceding claims, which is designed in such a way that - viewed in a section through the main axis (A) - a tangent (t) touching the lens (2), which on the opposite side of the main axis (A) through the edge point (r) of the light exit opening (4), with the main axis (A) enclosing an angle (a) which is at most 60 °.
    [12]
    12. Optical system according to one of the preceding claims, which is designed such that - viewed in a section through the main axis (A) - the extension (d) of the lens (2) normal to the main axis (A) at least 35% Erstre Deck (D) of the light exit opening (4) is, preferably at least 40%.
    [13]
    13. A luminaire, comprising - an LED light source (1) and - an optical system according to one of the preceding Anspmche.
    [14]
    14. Luminaire according to claim 13, in the form of a ceiling light, in particular a workstation lamp.
    [15]
    15. Luminaire according to claim 13 or 14, in which by the light exit opening (4) of the reflector (3) has a light exit opening of the lamp is described. 4 sheets of drawings
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    同族专利:
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    EP3058411A1|2016-08-24|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20110110093A1|2009-11-10|2011-05-12|Kevin Hsu|LED Lamp Having A Larger Lighting Angle|
    US20110170298A1|2010-01-14|2011-07-14|Smita Anaokar|LED Downlight with Improved Light Output|
    CN201811101U|2010-10-21|2011-04-27|深圳市日锋电子有限公司|LED spotlight|
    CN202188357U|2011-08-17|2012-04-11|惠州雷士光电科技有限公司|Led lighting module|
    AT235020T|1997-05-26|2003-04-15|Christian Bartenbach|LAMP|
    US20050168986A1|2004-01-30|2005-08-04|Scott Wegner|Reflector assemblies for luminaires|
    US7674005B2|2004-07-29|2010-03-09|Focal Point, Llc|Recessed sealed lighting fixture|
    JP5010010B2|2010-04-16|2012-08-29|フェニックス電機株式会社|Light emitting device|
    DE102012006999A1|2012-04-10|2013-10-10|Erco Gmbh|lamp|DE102016201347A1|2016-01-29|2017-08-03|Zumtobel Lighting Gmbh|Optical system for influencing the light output of a light source|
    US10337695B2|2016-10-26|2019-07-02|JST Performance, LLC|Reflector for lighting component with surfaces that subtend light from a light source and surfaces that subtend external light|
    法律状态:
    2018-08-15| MM01| Lapse because of not paying annual fees|Effective date: 20171231 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE201310221163|DE102013221163A1|2013-10-18|2013-10-18|Optical system for an LED light source and luminaire with such an optical system|
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