LED Dual-Reflektor

Abstract

Different variants of reflectors are presented, which, alone or in combination with a lighting unit presented here, form a space-saving, powerful lighting system.

Description

[0001] Herein, a system for illumination and a device for emitting focused light are proposed.

[0002] Arrangement variants of reflectors and light sources are largely responsible for the beam shape and / or beam width of an emitted light beam. The structure of a light source itself is, in turn, crucial for the dissipation of heat generated by the light source. The better the heat can be dissipated, the more power can be supplied to the light source, which thus achieves stronger illumination. The interaction of the arrangement of the light source relative to the reflectors and the structure of the light source itself influence the lighting properties and thus the lighting quality. DE 20 2013 006 570 U1 is known from the prior art, which shows a circular reflector which, when reflectors of the same design are arranged next to one another, wastes space that could be used for additional reflectors with light sources.

[0003] There is a need for an improved, particularly space-saving, lighting system and an improved, particularly space-saving, device for emitting focused light. In particular, there is a need for a system that can be combined with systems of a similar or identical design in a space-saving manner, in order to improve heat dissipation and lighting quality for the combination of systems as well as for the individual system.

[0004] This object is achieved with a system according to claim 1 and a device according to claim 19.

[0005] According to a first aspect, a lighting system is proposed. The system has a vertical, longitudinal, and transverse axis. The system has a lighting unit, for example a single one, arranged on or in a first longitudinal and transverse axis plane. The lighting unit is configured to emit a bundled light, for example a single one, in a first vertical axis direction, for example into a free space, as an illumination light.

[0006] The system may further comprise a first reflector arranged on the vertical axis and on or in a second longitudinal and transverse axis plane located above, in particular in a first vertical axis direction, the first longitudinal and transverse axis plane. The first reflector may be configured to reflect the bundled light, in particular coming from the first vertical axis direction, as first reflected light or as illumination light.

[0007] The first reflector can be configured to receive the bundled light (coming from) the first vertical direction, in particular at least substantially, to split it and to reflect a part of the bundled light as a reflected light or as an illumination light.

[0008] The first reflector can have two (separate) reflector surfaces, in particular those arranged non-rotationally symmetrically about the vertical axis. The two reflector surfaces can reflect a respective portion of the bundled light (exclusively) as a first reflected first partial light and as a first reflected second partial light. The two reflector surfaces can reflect a respective portion of the bundled light as illumination light. In other words, a portion of the bundled light can be reflected by a first reflector surface and another portion of the bundled light by a second reflector surface. The first and / or the second reflector surface can capture the bundled light at least almost completely.

[0009] The two separate reflector surfaces can be different or identical. At least one of the two (separate) reflector surfaces can be flat. At least one of the two (separate) reflector surfaces can be curved. At least one of the two (separate) reflector surfaces can be faceted. The two (separate) reflector surfaces can each have a reflector surface contour. The two contours can be different or identical. The two separate reflector surfaces can be flat or curved and / or arranged at an inclination relative to one another, in particular movable.

[0010] The first reflector can be arranged to be movable along a vertical axis / vertical axis direction.

[0011] The system may comprise a reflective element. The reflective element may be arranged in or on the first longitudinal and transverse axis plane around the light unit. In other words, the light unit may form a center of the surrounding reflective element. The reflective element may be configured to emit the reflected light as illumination light. The reflective element may be configured to emit the reflected first partial light and the reflected second partial light as illumination light.

[0012] The reflective element may be configured as a mirror or may comprise a mirror. The reflective element may be arranged non-rotationally symmetrically about the vertical axis.

[0013] The reflective element can be configured as two, e.g., separate, spherical shell-shaped reflector segments arranged opposite one another, in particular in or on the first longitudinal and transverse axis plane. The reflective element can be configured as two (separate) reflector segments, each with a reflector surface.

[0014] The reflective element can be configured as two, e.g., separate, spherical-shell-shaped reflector segments, each with a reflector surface. The two reflector surfaces of the reflector segments can face each other and be arranged on or in the first longitudinal and / or transverse axis plane. The shape, extent, and / or curvature of one of the two reflector surfaces can differ from the other of the two reflector surfaces.

[0015] The spherical shell-shaped reflector segments can each have a reflector surface, e.g. parabolic.

[0016] A virtual focal point of the respective reflector segments can each lie in one of the two reflector surfaces, e.g. of the first reflector. The virtual focal point can be the reflection of the bundled light in a first size on one of the two reflector surfaces. The size of the reflection of the light unit can vary with changing reflector surfaces of the first reflector. If the first reflector has two curved reflector surfaces, the corresponding size of the reflection of the light unit in one of the reflector surfaces is smaller or larger than compared to a first reflector with two (separate) flat reflector surfaces. The size of the reflection can become smaller or larger depending on the curvature. The reflector surfaces of the spherical shell-shaped reflector segments can each be faceted.

[0017] The reflective element can be arranged to be movable along a vertical axis / vertical axis direction. The two reflector segments can each be arranged to be movable along a vertical axis / vertical axis direction, in particular independently of one another.

[0018] The light unit can be configured as a plurality of light units. The first reflector can be configured as a plurality of reflectors. The respective surfaces of the plurality of reflectors can be faceted.

[0019] The plurality of light units can be arranged along the longitudinal axis, in particular parallel thereto. The plurality of reflectors can be arranged along the longitudinal axis, in particular parallel thereto, or along the plurality of light units, in particular parallel thereto.

[0020] The plurality of reflectors can be designed as a linear reflector, in particular a parabolic one. The linear reflector can have a continuous reflector surface or be formed as a single piece.

[0021] The system can form or comprise a first light unit-reflector arrangement. The first light unit-reflector arrangement can be defined by or comprise: the plurality of light units, which can be arranged along a circle or on a circle in the first longitudinal and transverse axis plane. A center point of the circle can lie on the vertical axis. Furthermore, the plurality of reflectors can be arranged on a further circle in the second longitudinal and transverse axis plane. A center point of the further circle arranged in the second longitudinal and transverse axis plane can lie on the vertical axis. The circles can have the same or different diameters.

[0022] The system may form or comprise a second light unit-reflector arrangement. The second light unit-reflector arrangement may comprise a second plurality of light units, which may be arranged along a circle or on a circle in a third longitudinal and transverse axis plane. A center point of the circle may lie on the vertical axis. The second light unit-reflector arrangement may comprise a second plurality of reflectors, which may be arranged on a further circle in a fourth longitudinal and transverse axis plane. A further center point of the further circle arranged in the fourth longitudinal and transverse axis plane may lie on the vertical axis.

[0023] The second arrangement may be arranged along the vertical axis / a vertical axis direction above the first arrangement.

[0024] The system may form or comprise a third light unit-reflector arrangement. The third light unit-reflector arrangement may comprise a third plurality of light units arranged along a circle in a fifth longitudinal and transverse axis plane. A center point of the circle may lie on the vertical axis. The third light unit-reflector arrangement may comprise a second plurality of reflectors arranged on a further circle in a sixth longitudinal and transverse axis plane. A further center point of the further circle arranged in the sixth longitudinal and transverse axis plane may lie on the vertical axis.

[0025] The third arrangement may be arranged above the second arrangement or below the second arrangement along the vertical axis. In other words, the third arrangement may be arranged above the second arrangement or between the first and second arrangements along the vertical axis. The system may also form or comprise more than three light unit-reflector assemblies.

[0026] At least one of the plurality of reflectors may have a parabolic reflector surface. At least one (of the second or third) plurality of reflectors may be interconnected and / or integrally formed.

[0027] The system can have a layer. The layer, in particular a translucent layer, can be configured to receive the focused light and emit it to at least one microplate. The at least one microplate can be configured to receive the light emitted by the layer. The at least one microplate can be configured to emit the received light to a freeform lens. The freeform lens can be configured to emit the light received from the at least one microplate as illumination light. The layer can be configured to scatter the received light symmetrically or asymmetrically. In other words, the layer homogenizes the focused light emitted by the light source.

[0028] The light unit or at least one (of the second or third) plurality of light units may be designed as a device for emitting bundled light according to a second aspect described below.

[0029] According to a second aspect, a device for emitting focused light is proposed. The device comprises at least one light source. The at least one light source has a first and a second side. The first side has at least one active region that emits the first light and at least one passive region. The device comprises a light-guiding body. The light-guiding body is configured to receive the light emitted by the light source, to guide it through the light-guiding body, and to emit it in a focused manner.

[0030] The light source can have a luminance. The luminance can reach a maximum value in the active region and decrease towards the passive region. In the passive region, the luminance can reach 1%, 2%, 5%, or 10% of the maximum value.

[0031] The collimated light can emit a light cone in an angle range from 2×20° to 2×60° relative to the vertical axis. The light cone can emit the collimated light at an angle of 2×50°, 2×40°, or 2×30°.

[0032] The light guide body may have a first and a second opening. The light guide body may have an inner and an outer side. The light guide body may be configured to receive the light emitted by the light source, guide it through the light guide body, and emit it in a bundled manner from the first opening. The second opening of the light guide body may be arranged on the first side of the light source.

[0033] The device can comprise a light-guiding body, in particular a highly transparent one, which can have an entrance and exit surface, as well as an outer surface. The transparent light-guiding body can be configured to receive the light emitted by the light source via the entrance surface, guide it through the transparent light-guiding body, and emit it in a bundled manner from the exit surface. The entrance surface of the transparent light-guiding body can be arranged on the first side of the light source. The transparent light-guiding body can comprise or consist of a light-refracting material.

[0034] The transparent light-guiding body can be designed as a, in particular miniaturized, pressed parabolic light-gathering lens (Compound Parabolic Concentrator (CPC), for example as a nano CPC). The transparent light-guiding body can be formed in one piece.

[0035] The transparent light-guiding body can have a diameter that can increase, in particular linearly, from the entrance surface to the exit surface, or can be constant. The diameter can be constant in a first part of the transparent light-guiding body and increase in a further part. The exit surface can be faceted or structured. The transparent light-guiding body can have a longitudinal axis. The entrance and exit surfaces can be arranged parallel to one another and perpendicular to the longitudinal axis.

[0036] The light guide body can be configured to receive the light emitted by the light source, guide it through a space in the light guide body, and emit it in a focused manner from the first opening. The space can be defined by the first and second openings as well as the interior of the light guide body.

[0037] The light guide body or the transparent light guide body may be connected to or in contact with the first side of the light source.

[0038] The second opening of the light guide body or the entrance surface of the transparent light guide body can enclose at least a part of the at least one active region and exclude at least a part of the passive region.

[0039] The light-guiding body can have a longitudinal axis. The first and second openings can be arranged on the longitudinal axis perpendicular to the longitudinal axis. The first and second openings can each have a (flat) opening plane, which can be arranged parallel to one another and perpendicular to (and on) the longitudinal axis.

[0040] The light guide body can be rotationally symmetrical to the longitudinal axis.

[0041] The light guide body can have an inner diameter which can increase, in particular degressively, or be constant starting from the second opening of the light guide body to the first end of the light guide body.

[0042] The inside can be polished, especially highly polished, painted or coated / vaporized with (highly) reflective materials.

[0043] The inner side, the first and second openings, in particular their respective opening planes, of the light-guiding body can define a space. A light-collecting lens, in particular a parabolic one, can be arranged in the space. The light-collecting lens can completely fill the space. The light-collecting lens can be designed as a, in particular miniaturized, pressed parabolic light-collecting lens (CPC, for example, as a nano CPC).

[0044] The device may comprise a heat sink. The heat sink may have a first side and a second side. The second side of the light source may be connected to the first side of the heat sink, in particular in a form-fitting and / or heat-conducting manner.

[0045] The at least one light source can be designed as a single light-emitting (surface) diode or as a plurality of light-emitting (surface) diodes, in particular light-colour-variable and / or light-heat-variable.

[0046] Further features, characteristics, advantages and possible modifications will become apparent to a person skilled in the art from the following descriptions, which refer to the accompanying drawings. Fig. 1 shows a schematic representation of an embodiment of a lighting system. Fig. 2 shows a variant of the embodiment of the lighting system. Fig. 3 shows a variant of the embodiment of the lighting system. Fig. 4 shows a variant of the embodiment of the lighting system. Fig. Figure 5 shows a schematic representation of a device for emitting focused light. Fig. 6 shows a schematic representation of a light guide body.

[0047] Fig. 1 shows a schematic representation of an embodiment of a system 200 for illumination. It shows a light unit 210 positioned on a longitudinal and transverse axis plane. The light unit 210 emits a bundled light in a first vertical axis direction. In the example shown, the first vertical axis direction is along the arrow direction of the vertical axis Lz. The light unit 210 is surrounded by two spherical shell-shaped reflectors 230, 240. These reflectors 230, 240 are arranged in the longitudinal and transverse axis plane, on which the light unit 210 is also arranged. A first reflector 220 is arranged in a second longitudinal and transverse axis plane. The first reflector 220 is aligned along the longitudinal axis Lx and, in the schematic representation, has two reflector surfaces 222, 223.

[0048] Both reflectors 230, 240 each have a reflector surface 232, 242, the focal point of which lies on one of the two reflector surfaces 222, 223 of the first reflector. The bundled light emitted by the light unit 210 is reflected in the first reflector.

[0049] In the example shown, the beam path is shown from the light unit 210, via a reflector surface 223 to one of the spherical shell-shaped reflector segments 230. The portions of the light reflected by the surfaces of the reflector segments are used as illumination light.

[0050] Fig. 2 shows a variant of the exemplary embodiment of the system 200 for illumination. In the illustration shown, the light unit is embodied as a plurality of identical light units 10a-c. The plurality of light units 10a-c are arranged along the longitudinal axis Lx and parallel thereto in a first longitudinal and transverse axis plane. A one-piece first reflector 224 is arranged in a second longitudinal and transverse axis plane parallel to the plurality of light units 10a-c. The one-piece reflector 224 has a continuous reflector surface that receives and reflects the bundled light emitted by the light units 10a-c. The reflected light is used as illumination light.

[0051] Fig. 3 shows a variant of an embodiment of the illumination system 200. In the illustration shown, a plurality of light units 10a-l are arranged on a circle. The circle lies in a first longitudinal and transverse axis plane. The center of the circle lies on the vertical axis Lz. A plurality of reflectors 226a-l are connected to one another and each have a parabolic reflector surface 227. The plurality of reflectors 226a-l are arranged on a second longitudinal and transverse axis plane and form another circle, the further center of which lies on the vertical axis Lz.

[0052] Each of the plurality of reflectors 226a-l is associated with one of the plurality of light units 10a-l. The plurality of reflectors 226a-l and the plurality of light units 10a-l can be rotated relative to each other about the vertical axis Lz, so that each light unit 10a-l illuminates two reflector surfaces.

[0053] The light received by the plurality of reflectors 226a-l is reflected and serves as illumination light.

[0054] Fig. 4 shows a variant of the exemplary embodiment of the system 200 for illumination. It shows a single light unit 10 in a first longitudinal and transverse axis plane. In a second longitudinal and transverse axis plane, which lies along the vertical axis direction above the first longitudinal and transverse axis plane, a layer 250 is arranged, configured to receive the focused light and emit it to a microplate 252. The microplate is arranged in a third longitudinal and transverse axis plane, which lies along the vertical axis direction above the second longitudinal and transverse axis plane. In other words, the focused light of the light unit 10 penetrates the layer 250. The microplate 252, in turn, is configured to receive the light emitted by the layer 250 and emit it to a freeform lens 254. The freeform lens 254, in turn, is configured to emit the light received from the microplates 254 as illumination light.For example, it can be used to illuminate walls. The freeform lens 254 is arranged in a fourth longitudinal and transverse axis plane, which lies above the third longitudinal and transverse axis plane along the vertical axis direction.

[0055] Fig. Figure 5 shows a schematic representation of an embodiment of a device 100 for emitting focused light. The device 100 comprises a light guide body 120, a light source 110, and a heat sink 130. The listed components are shown in an exploded view relative to one another. Typically, a second opening 122 of the light guide body 120 is connected to a first side 111 of the light source 110, and a second side 112 of the light source 110 is connected to a first side 131 of the heat sink 130. The second side of the heat sink may have surface enlargements to improve heat dissipation.

[0056] The light source 110 has an active region 111a on the first side 111, which exclusively emits light. In addition to the active region 111a, the first side 111 has a passive region 111b that is free of emitting light.

[0057] The second opening 122 of the light guide body 120 encloses the active region 111a and excludes a large portion of the passive region 111b. The light is emitted from the active region 111a, received by the second opening 122 of the light guide body 120, guided through the light guide body, and emitted as collimated light at the first end of the light guide body 121.

[0058] Fig.Figure 6 shows a schematic representation of the light guide body 120 in a longitudinal section. The light guide body 120 is rotationally symmetrical about a longitudinal axis L. An inner diameter 126 of the light guide body 120 decreases progressively from a first opening 122 to a second opening 121. This achieves improved light focusing and thus a contoured light beam. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 20 2013 006 570 U1

[0002]

Claims

[1] A lighting system (200), comprising: - a vertical (Lz), longitudinal (Lx) and transverse (Ly) axis, - a light unit (210) arranged on or in a first longitudinal and transverse axis plane, adapted to emit a bundled light in a first vertical axis direction as an illumination light. [2] The system (200) of claim 1, further comprising: - a first reflector (220) arranged on or in the vertical axis (Lz) and on or in a second longitudinal and transverse axis plane located above the first longitudinal and transverse axis plane, adapted to reflect the bundled light as a first reflected light or as an illumination light. [3] The system (200) of claim 2, wherein the first reflector (220) is configured to receive the collimated light from the first vertical direction, split it, and reflect a portion of the collimated light as a reflected light or as an illumination light. [4] The system (200) according to claim 2 or 3, wherein the first reflector (220) has two reflector surfaces (222)(223) which reflect a respective part of the collimated light as a first reflective first partial light and as a first reflected second partial light, or which reflect parts of the collimated light as an illumination light. [5] The system (200) according to any one of claims 1 to 4, wherein the system further comprises: a reflective element arranged in or on the first longitudinal and transverse axis plane around the light unit (210), configured to emit the reflected light or the reflected first partial light and the reflected second partial light as illumination light. [6] The system (200) of claim 5, wherein the reflective element is formed as a mirror. [7] The system (200) according to claim 5, wherein the reflective element is formed as two spherical shell-shaped reflector segments (230)(240) arranged opposite one another, in particular in or on the first longitudinal and transverse axis plane. [8] The system (200) according to claim 7, wherein the spherical shell-shaped reflector segments (230)(240) each have a reflector surface (232)(242) whose virtual focal point lies in one of the two reflector surfaces (222)(223). [9] The system (200) according to any one of claims 5 to 8, wherein the reflective element is arranged to be movable along a vertical axis direction, or the two reflector segments (230)(240) are each arranged to be movable along a vertical axis direction. [10] The system (200) according to any one of claims 1 to 9, wherein the light unit is formed as a plurality of light units (10a-c) and the first reflector is formed as a plurality of reflectors. [11] The system (200) of claim 10, wherein the plurality of light units (10a-c) are arranged along the longitudinal axis (Lx) and the plurality of reflectors are arranged along the longitudinal axis (Lx) (parallel). [12] The system (200) according to claim 10 or 11, wherein the plurality of reflectors is designed as a, in particular parabolic, linear reflector (224). [13] The system (200) of any one of claims 10 to 12, wherein a first light unit reflector assembly comprises: - a plurality of light units (10a-l) arranged along a circle in the first longitudinal and transverse axis plane, wherein a center of the circle lies on the vertical axis (Lz); and / or - a plurality of reflectors (226a-l) arranged on a further circle in the second longitudinal and transverse axis plane, wherein a further center point of the further circle lies on the vertical axis (Lz). [14] The system of claim 13, comprising a second light unit reflector assembly, the second assembly comprising: - a second plurality of light units arranged along a circle in a third longitudinal and transverse axis plane, wherein a center of the circle lies on the vertical axis, and / or - a second plurality of reflectors arranged on a further circle in a fourth longitudinal and transverse axis plane, a further center point of the further circle lying on the vertical axis, the second arrangement being arranged above the first arrangement along the vertical axis. [15] The system of claim 14, comprising a third light unit reflector assembly, the third assembly comprising: - a third plurality of light units arranged along a circle in a fifth longitudinal and transverse axis plane, wherein a center of the circle lies on the vertical axis, and / or - a second plurality of reflectors arranged on a further circle in a sixth longitudinal and transverse axis plane, the further center of the further circle lying on the vertical axis, the third arrangement being arranged above the second or below the second arrangement along the vertical axis. [16] The system (200) according to any one of claims 13 to 15, wherein at least one of the plurality of reflectors has a parabolic reflector surface (227), and / or at least a plurality of reflectors are connected to one another and / or are formed in one piece. [17] The system according to any one of claims 1 to 16, further comprising: - a layer (250) configured to receive the bundled light and to deliver it to at least one microplate (252), wherein the at least one microplate (252) is configured to receive the light emitted by the layer (250) and to deliver it to a freeform lens (254), wherein the freeform lens (254) is configured to output the light received from the at least one microplate as illumination light. [18] The system according to any one of claims 1 to 17, wherein the light unit or at least one of the plurality of light units is designed as a device according to any one of claims 19 to 28. [19] A device (100) for emitting focused light, comprising: - at least one light source (110) having a first (111) and a second side (112), wherein the first side (111) has at least one region (111a) actively emitting the first light and at least one passive region (111b), - a light guide body (120) configured to receive the light emitted by the light source (110), to guide it through the light guide body (120) and to emit it in a bundled manner. [20] The device (100) according to claim 19, wherein the light guide body (120) has a first opening (122) and a second opening (122), as well as an inside (123) and outside (124), wherein the second opening (122) of the light guide body (120) is arranged on the first side (111) of the light source (110) and the light guide body (120) is adapted to emit the bundled light from the first opening (121). [21] The device (100) of claim 20, wherein the second opening (122) of the light guide body (120) encloses the at least one active region (111a) and excludes at least a portion of the passive region (111b). [22] The device (100) according to claim 20 or 21, wherein the light-guiding body (120) has a longitudinal axis (L), wherein the first and second openings (121)(122) each have a (planar) opening plane which are arranged parallel to one another and perpendicular to the longitudinal axis (L), wherein the light-guiding body (120) is designed to be rotationally symmetrical to the longitudinal axis (L), wherein the light-guiding body (120) has an inner diameter (126) which increases, in particular degressively, starting from the second opening (122) of the light-guiding body (120) to the second end (121) of the light-guiding body (120). [23] The device (100) according to one of claims 20 to 22, wherein the inner side (123) is polished, in particular highly polished, painted or coated with (highly) reflective materials. [24] The device (100) according to one of claims 20 to 23, wherein the inner side (123), and the first (121) and second opening (122), in particular their respective opening plane, of the light guiding body (120) define a space in which a, in particular parabolic, light collecting lens is arranged, in particular completely fills the space. [25] The device (100) according to one of claims 19 to 24, wherein the light-guiding body is transparent and has an entrance and exit surface, as well as an outer side, wherein the transparent light-guiding body is configured to receive the light emitted by the light source via the entrance surface, to guide it through the transparent light-guiding body and to emit it in a bundled manner from the exit surface, wherein the entrance surface of the light-guiding body is arranged on the first side (111) of the light source (110). [26] The device (100) of claim 25, wherein the transparent light guide body comprises light-refracting material. [27] The device (100) according to one of claims 25 or 26, wherein the transparent light-guiding body is designed as a, in particular miniaturized, pressed parabolic light-collecting lens. [28] The device (100) according to one of claims 19 to 27, wherein the at least one light source is designed as a single or as a plurality of, in particular light color-variable and / or light heat-variable, light-emitting diode(s).

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