Cover member for a greenhouse, greenhouse, and use of a layer for a cover member

Abstract

A cover member for an in-store greenhouse is disclosed, with which radiation exiting the in-store greenhouse can be influenced or modified, so that outgoing total radiation has a white color on the Planck curve.

Claims

1. A method for modifying radiation exiting a greenhouse, the method comprising: providing a cover member for the greenhouse; using a film or a layer for the cover member of the greenhouse; an interior light configured to irradiate plants in the greenhouse with radiation emitted from the interior light including multiple emitted light portions defining corresponding multiple color ratios; and wherein the film or layer is configured such that a radiation which radiates from the inner side through the cover member is modified by filtering the multiple color ratios in different amounts, so that outgoing total radiation from the inner side to the outer side of the cover member and exiting the greenhouse has a white color on the Planck curve, and wherein the film or layer is configured as a color filter, and/or wherein additional radiation can be emitted with the film or layer, and/or wherein the film or the layer is configured as a converter, and/or wherein the film or the layer is configured as a polarizer.

2. The method according to claim 1, wherein the cover member comprises polyvinyl chloride.

3. The method according to claim 2, wherein the polyvinyl chloride has a thickness of about 100 μm.

4. The method according to claim 1, wherein the cover member is a configured as a translucent greenhouse pane for the greenhouse.

5. An indoor greenhouse system for use inside a building comprising: an indoor greenhouse arranged inside the building and having interconnected walls providing a greenhouse enclosure for growing plants; an interior light configured to irradiate plants in the greenhouse enclosure with radiation emitted from the interior light including multiple emitted light portions defining corresponding multiple color ratios; and a cover member defining at least a portion of the greenhouse enclosure and configured as a translucent greenhouse pane having an inner side facing inwardly into the greenhouse enclosure and an outer side facing outwardly away from the greenhouse enclosure and toward the building in which the indoor greenhouse is arranged, the translucent greenhouse pane being configured such that radiation from the outer side is operable to radiate through the pane to irradiate plants on the inner side while influencing radiation from the inner side through the pane to the outer side by filtering the multiple color ratios in different amounts, so that outgoing total radiation from the inner side to the outer side of the cover member and exiting the greenhouse has a white color on the Planck curve.

6. The greenhouse according to claim 5, wherein the translucent greenhouse pane includes a layer or film applied for influencing the radiation.

7. The greenhouse according to claim 5, wherein the translucent pane comprises a conversion substance.

8. The greenhouse according to claim 6, wherein the layer or film is configured as a color filter.

9. The greenhouse according to claim 6, wherein the layer or the film is configured as a translucent, organic light-emitting diode.

10. The greenhouse according to claim 6, wherein the layer or the film is configured as a converter.

11. The greenhouse according to claim 10, wherein the layer and/or the film comprises for conversion a luminescent substance or a luminescent substance mixture and/or nanomaterials.

12. The greenhouse according to claim 6, wherein the layer is configured as a polarizer.

13. The greenhouse according to claim 5, wherein the interior light emits at least partially polarized radiation, and/or wherein the interior light emits light which is adapted to plants that can be arranged in the greenhouse.

14. The greenhouse system according to claim 5, wherein the interior light is configured to produce a blue-violet radiation and at least one of a yellow radiation and a red radiation and wherein the cover member is configured for filtering the blue radiation to a greater extent than filtering the at least one of the yellow radiation and the red radiation to provide the outgoing total radiation exiting the greenhouse as the white color on the Plank curve.

15. The greenhouse system according to claim 5, wherein the cover member comprises polyvinyl chloride.

16. The cover member according to claim 15, wherein the polyvinyl chloride has a thickness of about 100 μm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following, the invention will be explained in more detail by means of the figures. The figures show:

(2) FIG. 1a and FIGS. 2 to 4 each show a schematic view of an in-store greenhouse each according to an embodiment,

(3) FIG. 1b shows light spectra and the transmission spectrum of a color filter in a curve representation, and

(4) FIG. 1c shows a CIE standard color system.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(5) According to FIG. 1a, an in-store greenhouse 1 is shown which has several cover members 2 as outer walls. The translucent cover members 2 are configured as panes. Plants can be arranged inside the in-store greenhouse 1, which can be irradiated with a blue-violet radiation via an interior light 4. The radiation emitted inside the in-store greenhouse 1 by the interior light 4 is schematically shown in FIG. 1a. The radiation comprises a blue ratio 6, a yellow ratio 8, and a red ratio 10. The blue ratio 6 is greater than the yellow and red ratios 8, 10, which is shown by an elongated arrow. In order for the radiation exiting the in-store greenhouse 1 to be perceived as white light, the panes of the cover members 2 are equipped with a layer which filters out or dims specific wavelengths. The cover members 2 thus act as a filter. According to FIG. 1a, in particular wavelengths in the blue range are filtered out. The radiation that exited the in-store greenhouse 1 has, according to FIG. 1a, a blue ratio 12, a yellow ratio 14 and a red ratio 16. It can be seen that by means of the cover members 2 acting as filters, the blue ratio 12 of the exiting radiation is decreased as compared to the blue ratio 6 of the interior light 4.

(6) FIG. 1b shows light spectra and the transmission spectrum of a color filter or a cover member. The wavelengths is stated in nanometers on the abscissa, the relative intensity of the light source with regard to the maximum or respectively the relative transmission of the filter is stated on the ordinate. The light or interior light for an in-store greenhouse in this case has a spectrum 36 with a high red and blue ratio. Moreover, the transmission spectrum 38 of a green filter can be seen which preferably filters out wavelengths in the blue range (about 450 nm) and in the red range (about 650 nm), but which permits the green color of the light (about 550 nm) to approx. 80%. The filter consists partially or completely of polyvinyl chloride and has in particular a thickness of 100 μm. Moreover, the filtered spectrum 40 is shown as perceived by an observer standing outside the in-store greenhouse. This spectrum 40 no longer shows any distinctive peaks for specific wavelengths, it is perceived as white by an observer.

(7) It can be seen in FIG. 1c how the color coordinate changes in the CIE standard color system by using the filter or cover member. The solid line shows the Planck curve 42 whose colors are perceived as white hues. A color point 44 of a light for the in-store greenhouse originally shows a color which clearly lies below the Planck curve. It has a rather violet color. By using the filter, a new color point 46 results which now almost perfectly lies on the Planck curve and which is consequently perceived as white by observers standing outside the in-store greenhouse. In this case, coordinates of CIEx=0.428 and CIEy=0.403 were reached. The correlated color temperature of the filtered spectrum is at 3150 Kelvin.

(8) Apart from the effect that the observers perceive the light to be white, the plants cultivated in the in-store greenhouse appear authentically in their color due to the filter or cover member.

(9) According to FIG. 2, an in-store greenhouse 18 is provided having cover members 20 whose panes have a layer applied to them, wherein the layer additionally emits radiation (additional radiation). The layer is, for example, an organic light-emitting diode. According to FIG. 2, the radiation emitted by the interior light 4 has the blue ratio 6 and the red ratio 10, wherein the blue ratio is significantly greater. Now, radiation is blended in via the cover members 20, whereby the radiation exiting towards outside has a whitish character instead of a blue-violet character. According to FIG. 2, the ratios 12, 14 and 16 are essentially the same in the exiting mixed radiation. Moreover, due to the additional radiation, the light intensity of the radiation exiting towards outside may be higher than the light intensity emitted by the interior light 4 due to the additional radiation. Moreover, for example, a part of the blue radiation emitted by the interior light 4 may be absorbed by the cover member 20.

(10) In FIG. 3, an in-store greenhouse 22 has cover members 24, whose panes each have a layer applied to them which acts as a converter. The layer measuring only a few micrometers may comprise yellow luminescent substances as luminescent substance, such as, e.g., Cer:Yag. Due to this reason, for example, the blue ratio 6 emitted by the interior light 4 can be at least partially converted into a yellow ratio 14. Thus, the radiation emitted by the interior light 4 may have a comparatively high blue ratio 6 and the red ratio 10, and the radiation exiting towards the outside may then have ratios 12 to 16. Due to this, it is possible that a strong blue ratio 6 may be partially converted into the yellow ratio 14 by the yellow luminescent substance, in order to create a whiter radiation together with the unconverted remaining blue ratio 12.

(11) According to FIG. 4, an in-store greenhouse 26 has cover members 28 acting as polarizers. A layer is applied to the panes of the cover members 28 which only permits radiation of a specific polarization. An interior light 30 emits polarized radiation 32, wherein at least part of the radiation 32 is emitted orthogonally to the polarization direction 34 of the cover member 28. When passing through the cover member 2, the radiation is filtered out which is emitted orthogonally to the polarization direction 34.

(12) A cover member for an in-store greenhouse is disclosed, with which radiation exiting the in-store greenhouse can be influenced or modified.

(13) Although the best mode contemplated by the inventors of carrying out the present invention is disclosed above, practice of the above invention is not limited thereto. It will be manifest that various additions, modifications and rearrangements of the features of the present invention may be made without deviating from the spirit and the scope of the underlying inventive concept.