WO2011004297A1 - An illumination device - Google Patents

An illumination device Download PDF

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Publication number
WO2011004297A1
WO2011004297A1 PCT/IB2010/053040 IB2010053040W WO2011004297A1 WO 2011004297 A1 WO2011004297 A1 WO 2011004297A1 IB 2010053040 W IB2010053040 W IB 2010053040W WO 2011004297 A1 WO2011004297 A1 WO 2011004297A1
Authority
WO
WIPO (PCT)
Prior art keywords
illumination device
plane
subsidiary
main plane
light sources
Prior art date
Application number
PCT/IB2010/053040
Other languages
French (fr)
Inventor
Volker Dirk Hildenbrand
Lars Christian Casper
Theodoor Cornelis Treurniet
Omke Jan Teerling
Original Assignee
Koninklijke Philips Electronics N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2011004297A1 publication Critical patent/WO2011004297A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general
    • A01G7/04—Electric or magnetic or acoustic treatment of plants for promoting growth
    • A01G7/045—Electric or magnetic or acoustic treatment of plants for promoting growth with electric lighting
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
    • A01G9/249—Lighting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

Definitions

  • the invention relates to an illumination device comprising a number of light sources located on at least a main plane and a subsidiary plane extending at an angle with respect to the main plane.
  • Such an illumination device which is known from US 6,688,759, is used for enhancing the growth of plants.
  • the main plane extends horizontally and a large number of subsidiary planes are pivotally connected to sides of the main plane.
  • Each subsidiary plane includes an obtuse angle with the main plane.
  • An obtuse angle is an angle of more than 90 degrees but less than 180 degrees.
  • the plants located below the centre of the known illumination device receive a lot more light than the plants located directly below the subsidiary planes. Due to the differences in light distribution over the plants, the plants grow at different rates.
  • the main plane includes a reflection angle with the subsidiary plane, whilst the light sources on the subsidiary plane are directed towards a reflector.
  • a reflection angle is an angle of more than 180 degrees.
  • the light emitted from the light sources on the subsidiary plane is directed towards the reflector, which reflects the light.
  • the combination of such a subsidiary plane and a reflector makes it possible to obtain a light distribution such that the minimal irradiance of the light received by the plants located below the illumination device, for example, is at least 80% of the maximum irradiance.
  • An embodiment of the illumination device according to the invention is characterized in that the illumination device comprises at least two subsidiary planes located on two parallel sides of the main plane.
  • Another embodiment of the illumination device according to the invention is characterized in that the reflection angle is about 130 - 140 degrees.
  • a further embodiment of the illumination device according to the invention is characterized in that the main plane is rectangular.
  • Yet another embodiment of the lamp assembly according to the invention is characterized in that the reflector located opposite a subsidiary plane comprises an at least partly convex section and an at least partly concave section, which at least partly convex section is located closer to the subsidiary plane than the at least partly concave section.
  • the convex and concave sections can preferably be described by means of Bezier curves, especially rational Bezier curves.
  • An embodiment of the illumination device according to the invention is characterized in that the illumination device comprises at least one additional reflector located on a side of the main plane without a subsidiary plane, which additional reflector comprises an at least partly concave section and an at least partly convex section, which at least partly concave section is located closer to the subsidiary plane than the at least partly convex section.
  • Another embodiment of the illumination device according to the invention is characterized in that the surface area of the main plane provided with light sources is substantially equal to the total surface area of subsidiary planes provided with light sources. It has been noticed that in this manner a desired light distribution can easily be obtained.
  • a further embodiment of the illumination device according to the invention is characterized in that the light sources comprise a number of red LEDs and a number of blue LEDs, distributed regularly over the main plane and the at least one subsidiary plane.
  • the wavelengths of red LEDs and blue LEDs are about 660 and 455 nm respectively. With such wavelengths an effective growth of plants can be realized.
  • At least the main plane comprises at least two segments provided with light sources, which segments are located at a distance from each other, whilst at least one heat sink is located on a side of the main plane remote from the light sources and extends (?) from one segment to another segment.
  • the heat sink will cool the segments of the main plane. Since the segments are located at a distance from each other, air will be able to flow between the segments through the heat sink, due to which the heat sink itself will be cooled. In this manner relatively simple but effective cooling of the main plane by means of the heat sink and cooling of the heat sink by means of air is obtained.
  • the subsidiary planes are provided with segments and such a heat sink.
  • Fig. 1 is a perspective view of an illumination device according to the invention
  • Fig. 2 is a bottom view of the illumination device as shown in Fig. 1,
  • Fig. 3 is a side view of the illumination device as shown in Fig. 1, in the direction of arrow III,
  • Fig. 4 is a cross section of the illumination device as shown in Fig. 1, in the direction of arrow IV,
  • Fig. 5 is a cross section of the illumination device as shown in Fig. 1, in the direction of arrow V,
  • Figures 6 A, 6B, 6C are schematic views of the reflectors and additional reflectors of the illumination device as shown in Figure 1 and a Bezier curve, respectively.
  • Figures 1-5 show different views of an illumination device 1 according to the invention, which comprises a rectangular main plane 2 and two subsidiary planes 3 located on two parallel sides of the main plane 2.
  • Each subsidiary plane 3 includes a reflection angle A (see Figure 4) with the main plane 2.
  • the reflection angle A is preferably about 130-140 degrees, and most preferably 135 degrees.
  • each subsidiary plane 3 a reflector 4 is located, which reflector 4 comprises an at least partly convex section 5 and an at least partly concave section 6 as seen from the side of the subsidiary plane 3. That is to say, section 5 is at least partly convex towards its adjacent subsidiary plane 3, and section 6 is at least partly concave towards its adjacent subsidiary plane 3.
  • the at least partly convex section 5 is located closer to the subsidiary plane 3 than the at least partly concave section 6.
  • the curvature of the convex section 5 as shown in Figures 1-5 is relatively small and is better visible in Figure 6A.
  • Each additional reflector 7 comprises an at least partly concave section 8 and an at least partly convex section 9 as seen from the side of the main plane 2.
  • the at least partly concave section 8 is located closer to the main plane 2 than the at least partly convex section 9. The curvature of the additional reflector 7 is better visible in Figure 6B.
  • the main plane 2 and the subsidiary planes 3 comprise each four segments 10, 11, respectively, which are located at a distance from each other.
  • the total surface area of the segments 10 of the main plane 2 is about the same as the total surface area of the segments 11 of the subsidiary planes 3.
  • the distance between the segments 10, 11 is about the same as the width of the segments 10, 11.
  • Each segment 10, 11 is provided with a number of light sources 12 comprising red LEDs and blue LEDs, distributed over the main plane 2 and subsidiary planes 3 in such a manner that each surface irradiated by the illumination device 1 according to the invention receives about the same intensity E of light, wherein Eblue(pos)/Rred(pos) * Ered(max)/Eblue(max) > 0,85 for each position (pos) on a surface parallel to the main plane 2.
  • Light emitted by the LEDs is partly emitted directly towards a surface extending parallel to the main plane 2. Another part of the light, especially light emitted from the LEDs on the subsidiary planes 3, is directed towards the reflector 4 and reflected by the reflector 4 towards the surface. Light emitted in the direction of the additional reflectors 7 will also be reflected in the direction of the surface. In this manner a homogeneous light distribution over the whole surface is obtained.
  • the illumination device 1 is used for enhancing the growth of plants, all plants will receive nearly the same amount of light and will grow at almost the same rate.
  • the illumination device 1 is provided with a heat sink 13 comprising a number of metal elements 14 extending perpendicularly to the main plane 3.
  • the metal elements 14 are not only located above the segments 10, 11 but also extend above the openings between two adjacent segments 10, 11.
  • air will flow in the direction of the segments 10, 11 which will be heated up by the LEDs.
  • the heat sink 13 will cool the segments 10, 11 from above.
  • the air will flow between the segments 10, 11 and hence cool the heat sink 13. In this manner effective cooling of the LEDs is obtained. This is important since the efficiency of the LEDs will drop in the case that the temperature is too high.
  • the values of the Bezier function and the weight factors w will be different.

Abstract

An illumination device (1) comprises a number of light sources located on at least a main plane (2) and a subsidiary plane (3) extending at an angle with respect to the main plane. The main plane includes a reflection angle with the subsidiary plane, whilst the light sources on the subsidiary plane are directed towards a reflector. The reflection angle is about 130-140 degrees.

Description

An illumination device
FIELD OF THE INVENTION
The invention relates to an illumination device comprising a number of light sources located on at least a main plane and a subsidiary plane extending at an angle with respect to the main plane.
BACKGROUND OF THE INVENTION
Such an illumination device, which is known from US 6,688,759, is used for enhancing the growth of plants. In the known device the main plane extends horizontally and a large number of subsidiary planes are pivotally connected to sides of the main plane. Each subsidiary plane includes an obtuse angle with the main plane. An obtuse angle is an angle of more than 90 degrees but less than 180 degrees.
Due to the obtuse angle the plants located below the centre of the known illumination device receive a lot more light than the plants located directly below the subsidiary planes. Due to the differences in light distribution over the plants, the plants grow at different rates.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an illumination device capable of delivering a more uniform light distribution.
This object is accomplished by means of an illumination device according to the invention, in that the main plane includes a reflection angle with the subsidiary plane, whilst the light sources on the subsidiary plane are directed towards a reflector.
A reflection angle is an angle of more than 180 degrees. The light emitted from the light sources on the subsidiary plane is directed towards the reflector, which reflects the light. The combination of such a subsidiary plane and a reflector makes it possible to obtain a light distribution such that the minimal irradiance of the light received by the plants located below the illumination device, for example, is at least 80% of the maximum irradiance. An embodiment of the illumination device according to the invention is characterized in that the illumination device comprises at least two subsidiary planes located on two parallel sides of the main plane.
Due to the subsidiary planes located on both sides of the main plane a very homogeneous irradiance can be obtained.
Another embodiment of the illumination device according to the invention is characterized in that the reflection angle is about 130 - 140 degrees.
With such a reflection angle the surface which can be homogeneously irradiated by means of the illumination device is relatively large.
A further embodiment of the illumination device according to the invention is characterized in that the main plane is rectangular.
With such a rectangular illumination device it is possible to position a number of similar illumination devices next to each other, whereby the whole surface located below the illumination devices receives a uniform light distribution.
Yet another embodiment of the lamp assembly according to the invention is characterized in that the reflector located opposite a subsidiary plane comprises an at least partly convex section and an at least partly concave section, which at least partly convex section is located closer to the subsidiary plane than the at least partly concave section.
Due to the combination of the partly convex and partly concave sections the uniform light distribution is further enhanced. The convex and concave sections can preferably be described by means of Bezier curves, especially rational Bezier curves.
An embodiment of the illumination device according to the invention is characterized in that the illumination device comprises at least one additional reflector located on a side of the main plane without a subsidiary plane, which additional reflector comprises an at least partly concave section and an at least partly convex section, which at least partly concave section is located closer to the subsidiary plane than the at least partly convex section.
In this manner light from light sources on the main plane which is directed outwardly is reflected by the additional reflector to achieve a more uniform light distribution below the side of the main plane which is not provided with a subsidiary plane.
Another embodiment of the illumination device according to the invention is characterized in that the surface area of the main plane provided with light sources is substantially equal to the total surface area of subsidiary planes provided with light sources. It has been noticed that in this manner a desired light distribution can easily be obtained.
A further embodiment of the illumination device according to the invention is characterized in that the light sources comprise a number of red LEDs and a number of blue LEDs, distributed regularly over the main plane and the at least one subsidiary plane.
The wavelengths of red LEDs and blue LEDs are about 660 and 455 nm respectively. With such wavelengths an effective growth of plants can be realized.
Another embodiment of the illumination device according to the invention is characterized in that at least the main plane comprises at least two segments provided with light sources, which segments are located at a distance from each other, whilst at least one heat sink is located on a side of the main plane remote from the light sources and extends (?) from one segment to another segment.
The heat sink will cool the segments of the main plane. Since the segments are located at a distance from each other, air will be able to flow between the segments through the heat sink, due to which the heat sink itself will be cooled. In this manner relatively simple but effective cooling of the main plane by means of the heat sink and cooling of the heat sink by means of air is obtained. Preferably also the subsidiary planes are provided with segments and such a heat sink. BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be explained in more detail with reference to the drawings, in which:
Fig. 1 is a perspective view of an illumination device according to the invention,
Fig. 2 is a bottom view of the illumination device as shown in Fig. 1,
Fig. 3 is a side view of the illumination device as shown in Fig. 1, in the direction of arrow III,
Fig. 4 is a cross section of the illumination device as shown in Fig. 1, in the direction of arrow IV,
Fig. 5 is a cross section of the illumination device as shown in Fig. 1, in the direction of arrow V,
Figures 6 A, 6B, 6C are schematic views of the reflectors and additional reflectors of the illumination device as shown in Figure 1 and a Bezier curve, respectively. DETAILED DESCRIPTION OF EMBODIMENTS
In the Figures, like parts are indicated by the same reference numerals.
Figures 1-5 show different views of an illumination device 1 according to the invention, which comprises a rectangular main plane 2 and two subsidiary planes 3 located on two parallel sides of the main plane 2. Each subsidiary plane 3 includes a reflection angle A (see Figure 4) with the main plane 2. The reflection angle A is preferably about 130-140 degrees, and most preferably 135 degrees.
Opposite each subsidiary plane 3 a reflector 4 is located, which reflector 4 comprises an at least partly convex section 5 and an at least partly concave section 6 as seen from the side of the subsidiary plane 3. That is to say, section 5 is at least partly convex towards its adjacent subsidiary plane 3, and section 6 is at least partly concave towards its adjacent subsidiary plane 3. The at least partly convex section 5 is located closer to the subsidiary plane 3 than the at least partly concave section 6. The curvature of the convex section 5 as shown in Figures 1-5 is relatively small and is better visible in Figure 6A. The section 5 on the right side of Figure 6A can be described by means of a rational Bezier function, wherein (x,y)0 = (130; 65); (x,y)i = (132,48;22,165); (x,y)2 = (170; 0) and a weight factor w of 0.62 < w < 0.63. The section 6 on the right side of Figure 6A can be described by means of a rational Bezier function, wherein (x,y)o = (170, 0); (x,y)i = (191,16;0); (x,y)2 = (220; -220) and a weight factor w of 0.71 < w < 0.72.
Near sides of the main plane 2 which extend perpendicularly to the sides along which the reflectors 4 are located, additional reflectors 7 are located. Each additional reflector 7 comprises an at least partly concave section 8 and an at least partly convex section 9 as seen from the side of the main plane 2. The at least partly concave section 8 is located closer to the main plane 2 than the at least partly convex section 9. The curvature of the additional reflector 7 is better visible in Figure 6B. The section 8 on the right side of Figure 6B can be described by means of a rational Bezier function, wherein (x,y)o = (150; 65); (x,y)i = (170,34;34,06); (x,y)2 = (180; 0) and a weight factor w of 0.41 < w < 0.42. The section 9 on the right side of Figure 6B can be described by means of a rational Bezier function, wherein (x,y)o = (180, 0); (x,y)i = (186,11;-30,4); (x,y)2 = (280; -200) and a weight factor w of 0.63 < w < 0.64.
The main plane 2 and the subsidiary planes 3 comprise each four segments 10, 11, respectively, which are located at a distance from each other. The total surface area of the segments 10 of the main plane 2 is about the same as the total surface area of the segments 11 of the subsidiary planes 3. The distance between the segments 10, 11 is about the same as the width of the segments 10, 11. Each segment 10, 11 is provided with a number of light sources 12 comprising red LEDs and blue LEDs, distributed over the main plane 2 and subsidiary planes 3 in such a manner that each surface irradiated by the illumination device 1 according to the invention receives about the same intensity E of light, wherein Eblue(pos)/Rred(pos) * Ered(max)/Eblue(max) > 0,85 for each position (pos) on a surface parallel to the main plane 2.
Light emitted by the LEDs is partly emitted directly towards a surface extending parallel to the main plane 2. Another part of the light, especially light emitted from the LEDs on the subsidiary planes 3, is directed towards the reflector 4 and reflected by the reflector 4 towards the surface. Light emitted in the direction of the additional reflectors 7 will also be reflected in the direction of the surface. In this manner a homogeneous light distribution over the whole surface is obtained. When the illumination device 1 is used for enhancing the growth of plants, all plants will receive nearly the same amount of light and will grow at almost the same rate.
On a side of the main plane 2 and the subsidiary planes 3 remote from the light sources 12, the illumination device 1 is provided with a heat sink 13 comprising a number of metal elements 14 extending perpendicularly to the main plane 3. The metal elements 14 are not only located above the segments 10, 11 but also extend above the openings between two adjacent segments 10, 11. In use, air will flow in the direction of the segments 10, 11 which will be heated up by the LEDs. The heat sink 13 will cool the segments 10, 11 from above. The air will flow between the segments 10, 11 and hence cool the heat sink 13. In this manner effective cooling of the LEDs is obtained. This is important since the efficiency of the LEDs will drop in the case that the temperature is too high.
It is possible to provide reflectors 4 on all sides of the main plane 2.
It is possible to use fewer or more segments 10, 11.
It is also possible to have a reflection angle of less or more than 130-140 degrees.
If the illumination device is smaller or larger than the described embodiment, the values of the Bezier function and the weight factors w will be different.

Claims

CLAIMS:
1. An illumination device (1) comprising a number of light sources located on at least a main plane (2) and a subsidiary plane (3) extending at an angle with respect to the main plane (2), characterized in that the main plane (2) includes a reflection angle with the subsidiary plane (3), whilst the light sources on the subsidiary plane (3) are directed towards a reflector (4).
2. An illumination device (1) according to claim 1, characterized in that the illumination device (1) comprises at least two subsidiary planes (3) located on two parallel sides of the main plane (2).
3. An illumination device (1) according to claim 1 or 2, characterized in that the reflection angle is about 130-140 degrees.
4. An illumination device (1) according to one of the preceding claims, characterized in that the main plane (2) is rectangular.
5. An illumination device (1) according to any one of the preceding claims, characterized in that the reflector (4) located opposite a subsidiary plane (3) comprises an at least partly convex section (5) and an at least partly concave section (6), which at least partly convex section (5) is located closer to the subsidiary plane (3) than the at least partly concave section (6).
6. An illumination device (1) according to any one of the preceding claims, characterized in that the illumination device (1) comprises at least one additional reflector (7) located on a side of the main plane (2) without a subsidiary plane (3), which additional reflector (7) comprises an at least partly concave section (8) and an at least partly convex section (9), which at least partly concave section (8) is located closer to the subsidiary plane (3) than the at least partly convex section (9).
7. An illumination device (1) according to any one of the preceding claims, characterized in that the surface area of the main plane (2) provided with light sources is substantially equal to the total surface area of subsidiary planes (3) provided with light sources.
8. An illumination device (1) according to any one of the preceding claims, characterized in that the light sources comprise a number of red LEDs and a number of blue LEDs, distributed regularly over the main plane (2) and the at least one subsidiary plane (3).
9. An illumination device (1) according to any one of the preceding claims, characterized in that at least the main plane (2) comprises at least two segments (10, 11) provided with light sources, which segments (10, 11) are located at a distance from each other, whilst at least one heat sink (13) is located on a side of the main plane (2) remote from the light sources and extends from one segment (10, 11) to another segment (10, 11).
PCT/IB2010/053040 2009-07-08 2010-07-02 An illumination device WO2011004297A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09164882.4 2009-07-08
EP09164882 2009-07-08

Publications (1)

Publication Number Publication Date
WO2011004297A1 true WO2011004297A1 (en) 2011-01-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3486551A1 (en) * 2017-11-21 2019-05-22 Johannes Bähr Lighting device suitable for promoting growth of crop plants

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020141182A1 (en) * 2001-02-23 2002-10-03 Holten Petrus Adrianus Josephus Luminaire
US6688759B1 (en) 2002-05-15 2004-02-10 Andrew Hadjimichael Plant growth-enhancing lamp device
EP1431653A2 (en) * 2002-12-19 2004-06-23 Toshiji Kishimura Light source for white color LED lighting and white color led lighting device
WO2008084562A1 (en) * 2007-01-11 2008-07-17 Miyoji Ishibashi Illuminator
EP2020564A1 (en) * 2007-07-31 2009-02-04 Ningbo Andy Optoelectronic Co., Ltd. High-power light emitting diode (led) street lamp
EP2025220A1 (en) * 2007-08-15 2009-02-18 Lemnis Lighting Patent Holding B.V. LED lighting device for growing plants
EP2039982A1 (en) * 2007-09-21 2009-03-25 Shenzhen Gasun Energy Technology Co. Ltd. LED lighting device for street light

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020141182A1 (en) * 2001-02-23 2002-10-03 Holten Petrus Adrianus Josephus Luminaire
US6688759B1 (en) 2002-05-15 2004-02-10 Andrew Hadjimichael Plant growth-enhancing lamp device
EP1431653A2 (en) * 2002-12-19 2004-06-23 Toshiji Kishimura Light source for white color LED lighting and white color led lighting device
WO2008084562A1 (en) * 2007-01-11 2008-07-17 Miyoji Ishibashi Illuminator
EP2020564A1 (en) * 2007-07-31 2009-02-04 Ningbo Andy Optoelectronic Co., Ltd. High-power light emitting diode (led) street lamp
EP2025220A1 (en) * 2007-08-15 2009-02-18 Lemnis Lighting Patent Holding B.V. LED lighting device for growing plants
EP2039982A1 (en) * 2007-09-21 2009-03-25 Shenzhen Gasun Energy Technology Co. Ltd. LED lighting device for street light

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3486551A1 (en) * 2017-11-21 2019-05-22 Johannes Bähr Lighting device suitable for promoting growth of crop plants

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