LIGHTING DEVICE AND LIGHTING METHOD FOR AT LEAST ONE PLANT

Abstract

The invention relates to a lighting device for at least one plant, comprising an artificial lighting unit for providing artificial light for lighting the plant; a sunlight unit for providing sunlight for lighting the plant; a mixing unit for generating a mixed light consisting of the artificial light and the sunlight; a distributing unit for distributing the mixed light and lighting the plant with the distributed mixed light; and an adjustment unit for adjusting a property of the mixed light. The invention provides a lighting device for at least one plant, i.e., one or more plants, wherein the device can be used in an energy-saving manner for indoor farming.

Claims

1-10. (canceled)

11. A lighting device for at least one plant comprising an artificial light unit for providing artificial light for lighting the plant and a sunlight unit for providing sunlight for lighting the plant; the device further including: a mixing unit for generating mixed light from the artificial light and the sunlight; a distribution unit for distributing the mixed light and lighting the plant with the distributed mixed light; and a setting unit for setting a settable property of the mixed light.

12. The lighting device in accordance with claim 11, wherein the settable property comprises a spectral distribution and/or an intensity.

13. The lighting device in accordance with claim 11, wherein the setting unit is configured to dynamically set the settable property of the mixed light.

14. The lighting device in accordance with claim 11, wherein the setting unit is configured to set the settable property of the mixed light in accordance with a stored specification.

15. The lighting device in accordance with claim 14, wherein the specification depends on a measured variable.

16. The lighting device in accordance with claim 15, wherein the measured variable is a time and/or a season and/or a temperature and/or a humidity and/or a soil moisture and/or a nutrient concentration.

17. The lighting device in accordance with claim 11, which includes a sensor unit for detecting a spectral distribution and/or an intensity of the sunlight and/or of the mixed light and/or of the artificial light; wherein the setting unit is configured to set the settable property of the mixed light in dependence on the detected spectral distribution and/or on the detected intensity.

18. The lighting device in accordance with claim 11, which includes a filter unit settable by the setting unit for the optical filtering of the sunlight and/or of the mixed light and/or of the artificial light.

19. The lighting device in accordance with claim 11, wherein the distribution unit comprises a plurality of illuminating units over which the mixed light is homogeneously distributed.

20. A plant cultivation system having a lighting device in accordance with claim 11 and having one or more of the following devices: a temperature control device for setting a temperature for the plant that can be illuminated by the lighting device; a humidifier for setting a humidity for the plant that can be illuminated by the lighting device; a soil moisturizing device for setting a soil moisture for the plant that can be illuminated by the lighting device; a fertilization device for setting a nutrient concentration for the plant that can be illuminated by the lighting device.

21. A method of lighting at least one plant comprising: providing artificial light for the lighting of the plant; providing sunlight for lighting the plant; generating mixed light from the artificial light and the sunlight; setting a property of the mixed light: and distributing the mixed light and lighting the plant with the distributed mixed light.

Description

[0021] Embodiments of the invention will be explained in more detail in the following with respect to a schematic drawing.

[0022] FIG. 1 here shows an exemplary embodiment of a lighting device for at least one plant.

[0023] The lighting device 1 shown in the present case serves the lighting of a plurality of plants 2 and comprises an artificial light unit 3 for providing artificial light 3′ and a sunlight unit 4 for providing sunlight 4′ which both serve the lighting of the plant 2. The lighting device 1 furthermore also has a mixing unit 5 for generating mixed light 5′ from the artificial light 3′ and the sunlight 4′ as well as a distribution unit 6 for distributing the mixed light 5′ and lighting the plants 2 with the distributed mixed light 5′. In the present case, the distribution unit 6 also has a plurality of illuminating units 7 by which the mixed light is homogeneously distributed. The illuminating units 7 are in the present case arranged above one another here, i.e. above one another in the y direction and respectively (in the y direction) above the plants 2 to be illuminated.

[0024] The lighting device 1 also has a setting unit 8 for setting a property of the mixed light 5′. This is done indirectly in the present case in that the setting unit 8 indirectly sets the artificial light unit 3 and thus, via the artificial light 3′ (directly settable here), a property such as a spectral distribution and/or an intensity of the mixed light 5′. Since the lighting unit 1 also has a sensor unit 9 in the present case for detecting a spectral distribution and/or an intensity in the present case of the mixed light and the setting unit 8 is configured to set the property of the mixed light in dependence on the detected spectral distribution or intensity of the mixed light, that is in the present case to control the artificial light unit 3 in dependence on the detected spectral distribution or intensity, a closed feedback loop symbolized by the annular arrow 10 is implemented in the example shown. This feedback loop can, for example, also be expanded by a corresponding filter unit for the optical filtering of one of the lights 3′, 4′, 5′, whereby then not only a complementing or supplementing of the sunlight 4′ can be implemented by the artificial light 3′, but also a damping of certain spectral components of the sunlight 4′ and thus also of the mixed light 5′.

[0025] In the example shown, the setting unit 8 is also configured to set the property of the mixed light in accordance with a stored specification 11. The stored specification 11 is in the present case adapted to the type of the plants 2 in the present case and can here depend on a measured variable 12, a soil moisture in the present case.