Light module for laboratory apparatuses

Abstract

The present invention relates to a light module for a laboratory apparatus, a light module for a laboratory apparatus comprising a plurality of LED groups, wherein each LED group comprises a plurality of identical LEDs and the LEDs of different LED groups are different from one another. Furthermore, the light module comprises a plurality of control channels, wherein each LED is assigned to precisely one of the control channels and each control channel allows for the simultaneous control of the assigned LEDs. Furthermore, the invention relates to a laboratory apparatus comprising at least one corresponding light module and to the use of a corresponding light module in a laboratory apparatus.

Description

LIGHT MODULE FOR LABORATORY APPARATUSES

[0001] The present invention relates to the field of illuminants for laboratory apparatuses and relates in particular to the provision of flexible light modules for laboratory apparatuses.

[0002] Laboratory apparatuses are often equipped with special illuminants, each designed for specific tasks. For example, there are laboratory apparatuses designed to promote or optimize plant growth through appropriate light, or to breed animals (e.g., Drosophila). This can be achieved, for example, by adjusting the light spectrum and / or light intensity, as well as providing a day- night cycle.

[0003] Specific illuminants are also particularly relevant in the field of photostability tests, in particular according to ICH Q1 B, i.e., for active substances and medical products where a combination of visible light and UV radiation is used.

[0004] Overall, for such applications, it is desirable to arrange illuminants in such a way that light is distributed as homogeneously as possible, so that the objects irradiated in the laboratory apparatus are exposed to the radiation as uniformly as possible. In other words, a high homogeneity of the spatial intensity distribution of the light is advantageous or, depending on the application, even necessary. In addition, it is desirable to adjust the light spectrum and / or the intensity of the light for different applications.

[0005] Typically, such laboratory equipment is often equipped with lighting units based on fluorescent tubes. However, the disadvantage of these lighting units is that they provide poor homogeneity in the spatial intensity distribution of the provided light. Furthermore, fluorescent tubes have poor energy efficiency and lifespan and often contain harmful substances such as mercury.In addition, dimming fluorescent tubes can cause a change in the spectrum provided.

[0006] Alternatively, the use of lighting units based on high-performance LEDs is also known. However, these have the disadvantage of high local heat generation and also provide only poor homogeneity with regard to the spatial intensity distribution of the light.

[0007] In this light, it is an object of the present invention to overcome or at least mitigate the shortcomings and disadvantages of the prior art. In general, it can be an object of the present invention to provide light modules that allow a uniform illumination of the shelves of the laboratory apparatus, preferably with a specified illumination range with an adjustable spectrum.

[0008] The object is achieved by the invention. Advantageous further developments are described in particular in the dependent claims, in the following description and with reference to the figures.

[0009] In a first aspect, the present invention relates to a light module for a laboratory apparatus comprising a plurality of LED groups, wherein each LED group comprises a plurality of identical LEDs and the LEDs of different LED groups are different from one another. Furthermore, the light module comprises a plurality of control channels, wherein each LED is assigned to precisely one of the control channels and each control channel allows for the simultaneous control of the assigned LEDs.

[0010] In other words, the present invention relates to a light module that can be intended for use in a laboratory apparatus. The light module comprises a plurality of different LEDs, which are surrounded by corresponding LED groups, so that each LED group comprises a plurality of identical LEDs. The LEDs can be controlled via control channels comprised by the light module, wherein each LED is assigned to precisely one control channel.

[0011] In embodiments of the invention, it can be provided that the LEDs of at least one LED group are arranged in an illuminant plane of the light module such that their density increases from a center of the lighting means plane to edge regions of the lighting means plane. In particular, it can be provided that the LEDs of each LED group are arranged in the illuminant plane of the light module such that their density increases from a center of the illuminant plane to edge regions of the illuminant plane. Increasing the density of LEDs in an LED group can advantageously allow improved homogeneity of the light provided by the corresponding LED group.

[0012] For example, in embodiments of the invention, it can be provided that the LEDs of the at least one LED group are arranged in the illuminant plane at intersection points of a two-dimensional grid, wherein distances between adjacent grid lines running in the same direction decrease in the circumferential direction from a center point of the illuminant plane.

[0013] In embodiments of the invention, it can be provided that the LEDs of the at least one LED group are arranged in the illuminant plane at intersection points of a two-dimensional grid, wherein distances between adjacent grid lines decrease in the circumferential direction from a center point along a first axis of symmetry and a second axis of symmetry of the grid running perpendicular thereto.

[0014] In embodiments of the invention, it can be provided that the LEDs of at least one LED group at a distance of 250 mm provide light in the range of 400 nm to 800 nm with a spatial intensity distribution having a relative standard deviation of at most ±15%, preferably ±8%, from a mean value of the spatial intensity distribution. Additionally or alternatively, in embodiments of the invention, it can be provided that the LEDs of at least one LED group at a distance of 250 mm provide light in the range of 320 nm to 400 nm with a spatial intensity distribution having a relative standard deviation of at most±30%, preferably ±25%, from a mean value of the spatial intensity distribution. The corresponding relative standard deviation can be achieved precisely by the inhomogeneous distribution of the LEDs in the illuminant plane.

[0015] In embodiments of the invention, it can be provided that each control channel comprises only LEDs of one LED group. In other words, it can be provided that LEDs of different LED groups are assigned to different control channels so that each control channel makes it possible to control only LEDs of one LED group. It should be understood that the control channel does not necessarily have to make it possible to control all LEDs in an LED group. For example, the LEDs of an LED group can be divided into two control channels. In other words, in embodiments of the invention it can be provided that at least two control channels are assigned to LEDs of the same LED group.

[0016] In embodiments of the invention, it can be provided that at least one control channel is assigned to all LEDs of an LED group.

[0017] In embodiments of the invention, it can be provided that the light module comprises 4 control channels.

[0018] In embodiments of the invention, it can be provided that the control of the LEDs assigned to a control channel comprises the control of the intensity of the LEDs. Controlling the intensity of the LEDs comprises turning the LEDs off (this corresponds to an intensity of zero). Likewise, intensity control can be used to adjust the overall spectrum of the light provided, for example, by changing the relative intensity of different LED groups. A day-night cycle can also be provided by controlling the intensity. This can comprise a change in the overall intensity and optionally also a change in the relative intensity, for example to emphasize red components in the spectrum at the beginning and end of a "day."

[0019] In embodiments of the invention, it can be provided that LEDs of different LED groups each provide different spectra. For example, different LED groups can provide different colors of the visible spectrum, as well as white light (e.g., 400 nm - 700 nm). In addition, LED groups can also provide light in the UV and / or infrared range of the spectrum.

[0020] In embodiments of the invention, it can be provided that at least one LED group comprises LEDs that provide light with a peak wavelength in the range of 610 nm to 760 nm, preferably in the range of 640 nm to 740 nm, for example 655 nm. This light can also be called red light. The peak wavelength refers to the wavelength at which the emission spectrum of the LED reaches its maximum.

[0021] In embodiments of the invention, it can be provided that at least one LED group comprises LEDs that provide light with a peak wavelength in the range of 400 nm to 500 nm, preferably in the range of 430 nm to 480 nm, for example 455 nm. This light can also be called blue light.

[0022] In embodiments of the invention, it can be provided that at least one LED group comprises LEDs that provide light with a peak wavelength in the range of 230 nm to 400 nm, preferably in the range of 315 nm to 390 nm, more preferably in the range of 340 nm to 365 nm. This light can also be called UV light.

[0023] In embodiments of the invention, it can be provided that at least one LED group comprises LEDs that emit white light with a continuous spectrum from 400 nm to 700 nm. This light can also be called white light.

[0024] In embodiments of the invention, it can be provided that each LED of the LEDs of the LED groups consumes a maximum of 2 W. Depending on the design, the consumption of individual LEDs can be as low as 30 mW. In embodiments of the invention, it can be provided that the light module has amaximum power consumption of 80 W, preferably 60 W. Overall, the present invention can thus advantageously reduce the energy consumption of the light module compared to known light modules.

[0025] In embodiments of the invention, it can be provided that each LED group comprises at least 12 LEDs. Additionally or alternatively, it can be provided that at least one LED group comprises at least 28 LEDs, preferably at least 48 LEDs, more preferably at least 112 LEDs. For example, a module can comprise one LED group having 112 LEDs and two LED groups having 12 LEDs each, wherein the 112 LEDs preferably provide white light (e.g., daylight) and the two LED groups having 12 LEDs each provide wavelengths in the UV spectrum. Alternatively, a module can, for example, also have an LED group having 112 LEDs, an LED group having 28 LEDs and an LED group having 48 LEDs, wherein the 112 LEDs preferably provide white light (e.g., daylight), the 28 LEDs preferably provide blue light and the 48 LEDs preferably provide red light.

[0026] In embodiments of the invention, it can be provided that the light module is configured to be attached to holding devices for shelves of the laboratory apparatus. For example, in embodiments of the invention, it can be provided that the light module is configured to be mounted in the laboratory apparatus by means of inserts mounted on the side of the laboratory apparatus. In particular, the light module can be configured to be inserted into holding devices for shelves of the laboratory apparatus. Additionally or alternatively, in embodiments of the invention, it can be provided that the light module comprises at least 2 holding portions on the outer sides, which are configured to be guided and / or stored on inserts or brackets in the laboratory apparatus. Appropriate fastening options can advantageously allow for a high degree of flexibility for the use of the light module inside a laboratory apparatus. In particular, a plurality of light modules can be used in one laboratory apparatus. Likewise, the distance to an underlying shelf, which can accommodate corresponding samples, for example, can be adjusted relatively flexibly.

[0027] In embodiments of the invention, it can be provided that the light module is rectangular.

[0028] In embodiments of the invention, it can be provided that the light module is configured to dissipate waste heat from the LEDs to the environment. In embodiments of the invention, it can be provided that the light module comprises a housing. Furthermore, in embodiments of the invention, it can be provided that the housing is at least partially made of a material with a thermal conductivity of at least 15 W ITT1K’1. This can advantageously allow the waste heat from the LEDs to be dissipated into the ambient air via the housing without the need for active cooling within the light module. This can reduce the energy consumption and complexity of the light module.

[0029] In embodiments of the invention, it can be provided that the housing is made at least partially of metal. For example, the housing can be made of stainless steel, which is easy to clean and generally germ-resistant.

[0030] In embodiments of the invention, it can be provided that the light module comprises at least one connection for connecting a controller and / or a driver. This means that the driver and / or controller does not have to be housed in the light module itself but can be located externally, for example inside the laboratory apparatus. This can reduce the heat input into the light module and thus also into the interior of the laboratory apparatus. In addition, the overall volume of the light module can be advantageously reduced.

[0031] In embodiments of the invention, it can be provided that the light module comprises a height of no more than 50 mm, preferably no more than 40 mm, more preferably no more than 32 mm. The low height of the light module can allow for flexible use within a laboratory apparatus. In particular, a plurality of light elements can be used simultaneously at different levels while the volume required inside the laboratory apparatus can be kept small, so that, overall,more samples can be provided with appropriate lighting conditions in the laboratory apparatus at the same time, thus allowing the efficiency of the laboratory apparatus to be increased.

[0032] In embodiments of the invention, it can be provided that the light module comprises a width in the range of 500 mm to 1000 mm, preferably in the range of 700 mm to 900 mm, more preferably in the range of 750 mm to 850 mm, for example 800 mm.

[0033] Additionally or alternatively, in embodiments of the invention, it can be provided that the light module has a depth in the range of 300 mm to 700 mm, preferably in the range of 450 mm to 600 mm, more preferably in the range of 550 mm to 600 mm, for example 575 mm. In particular, the light module can be dimensioned so that it fits into corresponding laboratory apparatuses.

[0034] In embodiments of the invention, it can be provided that the light module comprises a weight in the range of 10 kg to 15 kg, preferably in the range of 12 kg to 13 kg.

[0035] In embodiments of the invention, it can be provided that the laboratory apparatus is an incubator, a heating cabinet, and / or a climate-controlled cabinet.

[0036] In another aspect, the present invention relates to a laboratory apparatus that comprises an interior and at least one light module, wherein the light module is configured to illuminate at least a portion of the interior and is as described above.

[0037] In embodiments of the invention, it can be provided that the laboratory apparatus comprises a plurality of light modules.

[0038] In embodiments of the invention, it can be provided that the laboratory apparatus comprises holding devices for the at least one light module in the interior. Additionally or alternatively, in embodiments of the invention, it can be provided that the laboratory apparatus comprises holding devices for at least one shelf in the interior. Furthermore, it can be provided that the holding devices for the at least one light module and the at least one shelf are identical.

[0039] In embodiments of the invention, it can be provided that the holding device comprises inserts. In embodiments of the invention, it can be provided that the holding devices are provided by brackets suspended laterally in the laboratory apparatus.

[0040] In embodiments of the invention, it can be provided that the laboratory apparatus comprises a plurality of fastening points for the holding devices, which are configured to vary the height of the at least one shelf and / or at least one light module inside the laboratory apparatus.

[0041] In embodiments of the invention, it can be provided that the laboratory apparatus comprises a control unit for the at least one light module in the interior. Additionally or alternatively, it can be provided that the laboratory apparatus comprises at least one driver for the at least one light module.

[0042] In embodiments of the invention, it can be provided that the laboratory apparatus is an incubator, a heating cabinet, and / or a climate-controlled cabinet.

[0043] In a further aspect, the present invention relates to the use of the described light module in a laboratory apparatus for providing light adapted in terms of intensity and / or wavelength.

[0044] In embodiments of the invention, it can be provided that the use comprises a use for promoting plant growth.

[0045] In embodiments of the invention, the use can comprise providing a spectrum intended to promote plant growth.

[0046] In embodiments of the invention, it can be provided that providing a spectrum intended to promote plant growth comprises optimizing for growth, leaf formation, fruit formation and / or seed germination.

[0047] In embodiments of the invention, it can be provided that the use comprises the targeted intensification of certain wavelengths. For example, white, red or blue light can be intensified accordingly. In principle, the intensification can be advantageously selected by the user and optionally adapted to specifications such as standards.

[0048] In embodiments of the invention, it can be provided that the use comprises a use in animal breeding. Furthermore, it can be provided that the use in animal breeding comprises a use in insect breeding. Additionally or alternatively, it can be provided that the use in animal breeding or insect breeding comprises a use in Drosophila breeding.

[0049] In embodiments of the invention, the use can comprise providing an individual day-night cycle.

[0050] In embodiments of the invention, the use can comprise examining metabolic processes of cells.

[0051] In embodiments of the invention, it can be provided that the use comprises surface disinfection by means of UV radiation.

[0052] In embodiments of the invention, it can be provided that the use comprises a stability test, preferably a stability test according to ICH Q1 B.

[0053] In embodiments of the invention, it can be provided that the use takes place in a climate chamber.

[0054] In embodiments of the invention, it can be provided that the laboratory apparatus is a laboratory apparatus according to any of the laboratory apparatus embodiments described above.

[0055] The invention is also defined by the following embodiments.

[0056] Reference is made below to light module embodiments. These embodiments are indicated with an L followed by a number. When reference is made below to light module embodiments / L-embodiments, these embodiments are meant.

[0057] L1 . A light module for a laboratory apparatus, comprising a plurality of LED groups, wherein each LED group comprises a plurality of identical LEDs, wherein the LEDs of different LED groups are different from one another, a plurality of control channels, wherein each LED is assigned to precisely one of the control channels and each control channel allows for the simultaneous control of the assigned LEDs.

[0058] L2. The light module according to the above light module embodiment, wherein the LEDs of at least one LED group are arranged in an illuminant plane of the light module such that their density increases from a center of the illuminant plane to edge regions of the illuminant plane.

[0059] L3. The light module according to the above light module embodiment, wherein the LEDs of each LED group are arranged in the illuminant plane of the light module such that their density increases from a center of the illuminant plane to the edge regions of the illuminant plane.

[0060] L4. The light module according to any of the 2 preceding light module embodiments, wherein the LEDs of the at least one LED group are arranged in the illuminant plane at intersection points of a two-dimensional grid, wherein distances between adjacent grid lines running in the same direction decrease in the circumferential direction from a center point of the illuminant plane.

[0061] L5. The light module according to any of the 3 preceding light module embodiments, wherein the LEDs of the at least one LED group are arranged in the illuminant plane at intersection points of a two-dimensional grid, wherein distances between adjacent grid lines decrease in the circumferential direction from a center point along a first axis of symmetry and a second axis of symmetry of the grid running perpendicular thereto.

[0062] L6. The light module according to any of the preceding light module embodiments, wherein the LEDs of at least one LED group at a distance of 250 mm provide light in the range of 400 nm to 800 nm with a spatial intensity distribution having a relative standard deviation of at most ±15%, preferably ±8%, from a mean value of the spatial intensity distribution.

[0063] L7. The light module according to any of the preceding light module embodiments, wherein the LEDs of at least one LED group at a distance of 250 mm provide light in the range of 320 nm to 400 nm with a spatial intensity distribution having a relative standard deviation of at most ±30%, preferably ±25%, from a mean value of the spatial intensity distribution.

[0064] L8. The light module according to any of the preceding light module embodiments, wherein each control channel comprises only LEDs of one LED group.

[0065] L9. The light module according to any of the preceding light module embodiments, wherein LEDs of the same LED group are assigned to at least two control channels.

[0066] L10. The light module according to any of the preceding light module embodiments, wherein at least one control channel is assigned to all LEDs of an LED group.

[0067] L11. The light module according to any of the preceding light module embodiments, wherein the light module comprises 4 control channels.

[0068] L12. The light module according to any of the preceding light module embodiments, wherein the control of the LEDs assigned to a control channel comprises the control of the intensity of the LEDs.

[0069] L13. The light module according to any of the preceding light module embodiments, wherein LEDs of different LED groups each provide different spectra.

[0070] L14. The light module according to any of the preceding light module embodiments, wherein at least one LED group comprises LEDs that provide light with a peak wavelength in the range of 610 nm to 760 nm, preferably in the range of 640 nm to 740 nm, for example 655 nm.

[0071] The peak wavelength refers to the wavelength at which the emission spectrum of the LED reaches its maximum.

[0072] L15. The light module according to any of the preceding light module embodiments, wherein at least one LED group comprises LEDs that provide light with a peak wavelength in the range of 400 nm to 500 nm, preferably in the range of 430 nm to 480 nm, for example 455 nm.

[0073] L16. The light module according to any of the preceding light module embodiments, wherein at least one LED group comprises LEDs that provide light with a peak wavelength in the range of 230 nm to 400 nm, preferably in the range of 315 nm to 390 nm, more preferably in the range of 340 nm to 365 nm.

[0074] L17. The light module according to any of the preceding light module embodiments, wherein at least one LED group comprises LEDs that emit white light with a continuous spectrum of 400 nm to 700 nm

[0075] L18. The light module according to any of the preceding light module embodiments, wherein each LED of the LEDs of the LED groups consumes a maximum of 2 W.

[0076] L19. The light module according to any of the preceding light module embodiments, wherein the light module has a maximum power consumption of 80 W, preferably 60 W.

[0077] L20. The light module according to any of the preceding light module embodiments, wherein each LED group comprises at least 12 LEDs.

[0078] L21. The light module according to any of the preceding light module embodiments, wherein at least one LED group comprises at least 28, preferably at least 48 LEDs, more preferably at least 112 LEDs.

[0079] L22. The light module according to any of the preceding light module embodiments, wherein the light module is configured to be attached to holding devices for shelves of the laboratory apparatus.

[0080] L23. The light module according to any of the preceding light module embodiments, wherein the light module is configured to be mounted in thelaboratory apparatus by means of inserts mounted on the side of the laboratory apparatus.

[0081] L24. The light module according to any of the preceding light module embodiments, wherein the light module comprises at least 2 holding portions on the outer sides, which are configured to be guided and / or stored on inserts or brackets in the laboratory apparatus.

[0082] L25. The light module according to any of the preceding light module embodiments, wherein the light module is rectangular.

[0083] L26. The light module according to any of the preceding light module embodiments, wherein the light module is configured to dissipate waste heat from the LEDs to the environment.

[0084] L27. The light module according to any of the preceding light module embodiments, wherein the light module comprises a housing.

[0085] L28. The light module according to the preceding light module embodiment, wherein the housing is at least partially made of a material with a thermal conductivity of at least 15 W ITT1K’1.

[0086] L29. The light module according to one of the 2 preceding light module embodiments, wherein the housing is at least partially made of metal.

[0087] L30. The light module according to any of the preceding light module embodiments, wherein the light module comprises at least one connection for connecting a controller and / or a driver.

[0088] L31. The light module according to any of the preceding light module embodiments, wherein the light module has a height of no more than 50 mm, preferably no more than 40 mm, more preferably no more than 32 mm.

[0089] L32. The light module according to any of the preceding light module embodiments, wherein the light module has a width in the range of 500 mm to 1000 mm, preferably in the range of 700 mm to 900 mm, more preferably in the range of 750 mm to 850 mm, for example 800 mm.

[0090] L33. The light module according to any of the preceding light module embodiments, wherein the light module comprises a depth in the range of 300 mm to 700 mm, preferably in the range of 450 mm to 600 mm, more preferably in the range of 550 mm to 600 mm, for example 575 mm.

[0091] L34. The light module according to any of the preceding light module embodiments, wherein the light module comprises a weight in the range of 10 kg to 15 kg, preferably in the range of 12 kg to 13 kg.

[0092] L35. The light module according to any of the preceding light module embodiments, wherein the laboratory apparatus is an incubator, a heating cabinet, and / or a climate-controlled cabinet.

[0093] Reference is made below to laboratory apparatus embodiments. These embodiments are indicated with a G followed by a number. Whenever the term "laboratory apparatus embodiments" or "G embodiments" is used below, these embodiments are meant.

[0094] G1 . A laboratory apparatus, comprising an interior, at least one light module according to any of the preceding light module embodiments, wherein the light module is configured to illuminate at least part of the interior.

[0095] G2. The laboratory apparatus according to the above laboratory apparatus embodiment, wherein the laboratory apparatus comprises a plurality of light modules.

[0096] G3. The laboratory apparatus according to any of the preceding laboratory apparatus embodiments, wherein the laboratory apparatus comprises holding devices for the at least one light module in the interior.

[0097] G4. The laboratory apparatus according to any of the preceding laboratory apparatus embodiments, wherein the laboratory apparatus comprises holding devices for at least one shelf in the interior.

[0098] G5. The laboratory apparatus according to the preceding laboratory apparatus embodiment and having the features of the laboratory apparatus embodiment G3, wherein the holding devices are identical.

[0099] G6. The laboratory apparatus according to any of the 3 preceding laboratory apparatus embodiments, wherein the holding device comprises inserts.

[0100] G7. The laboratory apparatus according to any of the 4 preceding laboratory apparatus embodiments, wherein the holding devices are provided by brackets suspended laterally in the laboratory apparatus.

[0101] G8. The laboratory apparatus according to any of the 5 preceding laboratory apparatus embodiments, wherein the laboratory apparatus comprises a plurality of fastening points for the holding devices, which are configured to vary the height of the at least one shelf and / or at least one light module inside the laboratory apparatus.

[0102] G9. The laboratory apparatus according to any of the preceding laboratory apparatus embodiments, wherein the laboratory apparatus comprises a control unit for the at least one light module.

[0103] G10. The laboratory apparatus according to any of the preceding laboratory apparatus embodiments, wherein the laboratory apparatus comprises at least one driver for the at least one light module.

[0104] G11. The laboratory apparatus according to any of the preceding laboratory apparatus embodiments, wherein the laboratory apparatus is an incubator, a heating cabinet, and / or a climate-controlled cabinet.

[0105] Reference is made below to use embodiments. These embodiments are indicated with a V followed by a number. Whenever the term "use embodiments" or "V embodiments" is used below, these embodiments are meant.

[0106] V1 . A use of a light module for a laboratory apparatus according to any of the preceding light module embodiments in a laboratory apparatus for providing a light adapted with regard to intensity and / or wavelength.

[0107] V2. The use according to the preceding use embodiment, wherein the use comprises a use for promoting plant growth.

[0108] V3. The use according to the preceding use embodiment, wherein the use comprises providing a spectrum intended to promote plant growth.

[0109] V4. The use according to the preceding use embodiments, wherein providing a spectrum intended to promote plant growth comprises optimizing for growth, leaf formation, fruit formation and / or seed germination.

[0110] V5. The use of any of the preceding use embodiments, wherein the use comprises the targeted intensification of certain wavelengths.

[0111] V6. The use according to any of the preceding use embodiments, wherein the use comprises a use in animal breeding.

[0112] V7. The use according to the preceding use embodiment, wherein the use in animal breeding comprises a use in insect breeding.

[0113] V8. The use according to either of the 2 preceding use embodiments, wherein the use in animal breeding or insect breeding comprises a use in Drosophila breeding.

[0114] V9. The use according to any of the preceding use embodiments, wherein the use comprises providing an individual day-night cycle.

[0115] V10. The use according to any of the preceding use embodiments, wherein the use comprises examining metabolic processes of cells.

[0116] V11 . The use according to any of the preceding use embodiments, wherein the use comprises surface disinfection by means of UV radiation.

[0117] V12. The use according to any of the preceding use embodiments, wherein the use comprises a stability test, preferably a stability test according to ICH Q1 B.

[0118] V13. The use according to the preceding use embodiment, wherein the use takes place in a climate chamber.

[0119] V14. The use according to any of the preceding use embodiments, wherein the laboratory apparatus is a laboratory apparatus according to any of the preceding laboratory apparatus embodiments.

[0120] Embodiments of the present invention are now described with reference to the accompanying drawings. These embodiments are intended to be exemplary and not limitative of the present invention.

[0121] Fig. 1 shows an exemplary distribution of the LEDs of an LED group;Fig. 2 shows the distribution of measuring points for a spatial measurement of the light provided by a light module;Fig. 3 shows an exemplary light module; andFig. 4 shows a laboratory apparatus.

[0122] It is noted that not all drawings bear all reference signs. Instead, in some of the drawings, some of the reference signs have been omitted for brevity and ease of presentation. Embodiments of the present invention are now described with reference to the accompanying drawings.

[0123] The present invention relates to a light module 1 for laboratory apparatuses, which light module comprises a plurality of control channels and a plurality of LED groups, wherein each LED group comprises a plurality of identical LEDs. The LEDs of different LED groups, however, are different from one another. In other words, the LEDs of different LED groups are different, for example in terms of spectrum, design, power, etc. For example, a light module can comprise a red LED group, a blue LED group and a white LED group, wherein the color refers to the spectrum provided by the LED group.

[0124] Each LED of the light module is assigned to precisely one of the control channels. Preferably, only LEDs of one LED group can be assigned to a control channel, although this does not exclude the possibility that the LEDs of one LED group are assigned to a plurality of control channels overall. In the example above, the LEDs of the red LED group and the LEDs of the blue LED group could each be assigned to one control channel, whereas the LEDs ofthe white LED group can be split into 2 control channels, i.e., can be assigned to two control channels.

[0125] Each control channel allows simultaneous control of the assigned LEDs. In particular, the intensity of the assigned LEDs can be controlled using the corresponding control channel. This makes it possible, for example, to manipulate the overall intensity of the light provided, but also the spectral composition of the light. For example, a red or blue part of the spectrum can be reduced or increased relative to other parts of the spectrum. It goes without saying that the LEDs can also be switched off completely, for example, i.e., their intensity can be set to zero.

[0126] The LEDs of at least one group and preferably of each group are in each case arranged with an outwardly condensing distribution in the illuminant plane of the light module. In this context, Fig. 1 shows an example of the distribution of LEDs 12 of an LED group in the illuminant plane 14 of the light module 1. In the embodiment shown, the LEDs are each arranged at intersection points of a two-dimensional grid, wherein the distances between adjacent grid lines running in the same direction decrease in the circumferential direction from a center point of the illuminant plane. In particular, the distance between adjacent grid lines decreases from the inside to the outside. In other words, the following applies: to>ti>t2>ts and to>t‘i>t‘2>t‘3, as well as bo>bi>b2>b3>b4>bs>b6 and bo>b‘i>b‘2>b‘3>b‘4>b‘5>b‘6. Preferably, the grid is symmetrical, i.e., preferably tn= t’n(n = 1 , 2, 3) and bm= b’m(m = 1 , ... 6).

[0127] The distances can be distributed, for example, according to an inverse parabolic function.

[0128] In embodiments in which the grid is symmetrical, distances between adjacent grid lines can decrease accordingly in the circumferential direction from a center point along a first axis of symmetry and a second axis ofsymmetry of the grid perpendicular thereto. The axes of symmetry typically run orthogonal to one another.

[0129] Alternatively, the LEDs of an LED group can also be arranged on ellipses, for example, whose arrangement decreases in the circumferential direction. In other words, a change in the length of the semiaxes can become increasingly smaller in the circumferential direction compared to a previous ellipse.

[0130] In general, the LEDs of at least one LED group can be arranged in the illuminant plane of the light module such that their density increases from a center of the illuminant plane to the edge regions of the illuminant plane. Preferably, the LEDs of each LED group can be arranged accordingly.

[0131] This arrangement of the LEDs, which becomes denser toward the outside, advantageously allows homogeneous distribution of the light. Fig. 1 shows simulation data in which the distribution was optimized with respect to the number of LEDs and thus the power consumption and the achievable homogeneity of the light intensity. The lines define regions of equal intensity, wherein the intensity in the simulation varies between 4.5 and 5.5.

[0132] It was also possible to confirm the homogeneity of the light provided in test measurements. Here, a light module according to the invention was used, which comprises an LED group having 112 white LEDs, an LED group having 12 red LEDs, an LED group having 12 blue LEDs, and 2 LED groups having 12 LEDs each, which have a peak wavelength in the UV-A range (340 nm and 365 nm).

[0133] With reference to Fig. 2, an area of 800 mm x 589 mm was irradiated during the spatial measurements, wherein the spatial measurements were carried out on an evaluation area of 670 mm x 490 mm at a distance of approximately 200-250 mm from the light module with a light sensor. For thispurpose, measurements were taken at 49 points in a 7 x 7 grid as shown in Fig. 2.

[0134] Firstly, the illuminance in lux was measured for wavelengths in the range of 230 nm to 1000 nm. This shows that a very homogeneous illuminance can be achieved using a light module according to the invention. In addition, UV radiation in the range of 320 nm to 400 nm was measured in W / m2. Here, it was possible to achieve a homogeneity of ± 25%. For the wavelengths of visible light (400 nm to 800 nm), the homogeneity was ± 8%. The term "homogeneity" refers to the minimum and maximum deviation from the mean value of the measured data and is therefore in particular higher than, for example, the standard deviation.

[0135] Overall, the measurement results confirm the homogeneity of the provided light, advantageously provided by the light module according to the invention, both with respect to intensity and spectral distribution.

[0136] As already mentioned, the LEDs of different LED groups are different from one another. In particular, LEDs from different LED groups can each provide a different spectrum. For example, an LED group can comprise blue LEDs, i.e., LEDs whose spectrum has wavelengths in the blue range (400 nm to 500 nm). In particular, the peak wavelength can be in the range of 400 nm to 500 nm. Blue light, for example, can be beneficial for plant growth.

[0137] Likewise, an LED group can comprise red LEDs, i.e., LEDs whose spectrum has wavelengths in the red range (610 nm to 760 nm). In particular, the peak wavelength can be in the range of 610 nm to 760 nm. Red light, for example, can also be beneficial for plant growth and, in particular, the rate of photosynthesis.

[0138] In particular, an LED group having white LEDs can be provided, i.e., an LED group comprising LEDs that provide white light, for example bysuperimposing the primary colors (RGB LED) or by converting short-wave light by means of a luminescent material, for example phosphor. White LEDs, for example, can provide a continuous spectrum from 410 nm to 710 nm. White light can be used, for example, to simulate a day-night cycle or for photostability tests. Due to its broad spectrum, it can also be beneficial for plant growth, for example.

[0139] Likewise, an LED group can comprise UV LEDs, preferably UV-A LEDs, i.e., LEDs whose spectrum has wavelengths in the UV-A range (315 nm to 400 nm). In particular, the peak wavelength can be in the range of 315 nm to 400 nm. UV light can be used, for example, for photostability tests or surface disinfection methods.

[0140] For example, a light module for promoting plant growth can comprise one LED group of blue LEDs, one LED group of red LEDs and one LED group of white LEDs, wherein the LED groups of red and blue LEDs can each be the same size, while the LED group of white LEDs is, for example, twice as large (e.g., 104 white LEDs, 52 red LEDs and 52 blue LEDs). The LEDs of each group can advantageously be arranged in the illuminant plane in such a way that their density increases from the center of the illuminant plane to the edge regions of the illuminant plane. This advantageously allows improved homogeneity to be achieved for each spectral component compared to a uniform distribution.

[0141] The LEDs of the LED group of white LEDs can advantageously be assigned to two control channels, wherein each LED is assigned to only one of the two control channels. This can advantageously allow for better control of the intensity. In the above example, 4 control channels can be provided: one control channel for the red LEDs, one control channel for the blue LEDs and two control channels for the white LEDs. This also makes it possible to adjust the spectrum to meet specific needs, for example by increasing the intensity of the red and blue spectral ranges to, for example, promote plant growth.

[0142] By using a larger number of LEDs and optimizing the spatial arrangement, the use of high-power LEDs can be reduced; preferably, if available, the use of high-power LEDs can be dispensed with, thus reducing energy consumption in particular. In particular, high-performance LEDs can be dispensed with for white, red and blue LEDs, and, if they are sufficiently efficient, this is also preferably the case for LEDs in the UV range. In addition, this also advantageously reduces the energy input into the laboratory apparatus. The light module can have a maximum power consumption of 80 W, preferably 60 W. Preferably, the LEDs of the LED groups can have a low energy consumption, for example the individual LEDs can have a power consumption of less than 2 W. Dispensing with high-performance LEDs (e.g., in the visible spectrum) not only contributes to better homogeneity, but can also prevent "hot spots" in the light module, which can arise from the waste heat of high-performance LEDs and may even require active cooling. In other words, by using a plurality of LEDs, the present invention advantageously makes it possible to prevent the formation of hot spots and to distribute the waste heat more evenly. This can increase the service life of the light modules and improve the temperature distribution in the laboratory apparatus.

[0143] Fig. 3 a) and 3 b) show an exemplary embodiment of a light module 1 for laboratory apparatuses, wherein Fig. 3 a) shows the rear side and Fig. 3 b) shows the front side of the light module 1. The illuminant plane 14 of the light module is arranged on the front side of the light module 1 .

[0144] The light module 1 can preferably have a rectangular shape. This advantageously corresponds to the typical shape of shelves for laboratory cabinets, so that they can be well illuminated. Furthermore, the light module is preferably designed to be flat, i.e., the height is significantly smaller than the width and depth of the light module. The height is preferably less than 3 cm.

[0145] The light module 1 also comprises a connection 16 via which a controller and / or a driver can be connected. In particular, the light module 1 itself preferably comprises neither a controller nor a driver. This could, for example, be housed in the laboratory apparatus. This advantageously allows the light module to require a smaller volume, in particular a smaller height, and thus take up less space within the interior of the laboratory apparatus. Furthermore, the modules can advantageously be designed to be very lightweight, which simplifies handling for the users.

[0146] The light module can be configured to passively dissipate the waste heat from the LEDs into the environment. For this purpose, the light module can preferably comprise a housing that is at least partially made of a material with high thermal conductivity (> 15 W ITT1K’1). For example, the housing can be made at least partially of metal, preferably stainless steel, for example stainless steel 1.4301.

[0147] To attach the light module, it can generally be provided that the light module can be attached in the same way as the shelves in the laboratory apparatus. In other words, it can be provided that the light module can be attached to the holding devices for shelves of the laboratory apparatus. For example, the light module can use the same inserts as the shelves. The inserts can be provided, for example, by brackets attached to the side of the laboratory apparatus, onto which the shelves or the light module are pushed.

[0148] For this purpose, the light module 1 can in particular comprise holding portions 19, for example holding plates, which can be guided and / or stored on the inserts or brackets in the laboratory apparatus. This allows for safe, simple and flexible installation of the light module in the laboratory apparatus 1.

[0149] On the front side, the light module 1 can preferably have a pane that is attached to the housing. This can advantageously make it possible to atmospherically separate the illuminant plane from the environment and thusin particular from the interior of a laboratory apparatus. This can advantageously make it possible to protect the LEDs from high humidity. The pane can be made of glass or plastics material, for example, and can basically be configured to allow the light from the LEDs in the illuminant plane 14 to pass through. In this case, the pane can be transparent or, alternatively, be configured to scatter the light. In other words, the pane can be satin or matte, or opal or milky.

[0150] In Fig. 3b, LEDs of the different LED groups can be seen. In particular, it can be seen that the density of LEDs is higher at the edge of the illuminant plane 14 than in the center. As already mentioned, this makes it possible to achieve better homogeneity.

[0151] Fig. 4 a) and b) show an exemplary laboratory apparatus 2 with shelves 22 that are fastened inside the laboratory apparatus by means of corresponding inserts / brackets. The light modules shown in Fig. 4 are pushed onto corresponding inserts / brackets, which, however, are not visible in Fig. 4 a) and are not fixed in the laboratory apparatus in the state shown in Fig. 4 b). Instead, light modules and / or associated brackets / inserts protrude slightly from the laboratory apparatus for illustration purposes. The light modules are shown only schematically, in particular in Fig. 4 b), and in particular the holding portions 19 are not shown, so that the inserts / brackets are indicated next to the particular light modules. Fig. 4 b) therefore only shows the schematic arrangement of the light modules 1 in the laboratory apparatus 2, wherein, for reasons of simplicity, the brackets of these light modules are not shown. Typically, the height of the inserts or brackets within the laboratory apparatus can be flexibly adjusted. In the embodiment shown, for example, a plurality of fastening points in the form of holes are provided in which the inserts or brackets can be fastened, for example hung.

[0152] The flexible fastening of the light modules allows the distances from samples to be selected individually and flexibly. Furthermore, a plurality of lightmodules can advantageously be distributed flexibly in the apparatus, for example by insertion. This allows different samples to be supplied with different light intensities and spectra at the same time. Additionally or alternatively, the corresponding modules allow the sample throughput to be increased because appropriate light can be provided on a plurality of shelves at the same time.

[0153] Overall, light modules according to the invention allow for improved homogeneity due to the condensed arrangement of the LEDs toward the outer edges of the light module. In addition, homogeneity can be promoted by using different LEDs in comparatively high numbers. This can improve homogeneity compared to known solutions with high-energy light sources, which cannot ensure homogeneous illumination of the irradiated area to the same extent. In addition, the comparatively high number of LEDs can prevent the formation of hot spots because the individual LEDs require less energy and therefore produce less waste heat than high-performance LEDs, thus allowing for a more even distribution of waste heat. This can advantageously increase the service life of the light module and improve the temperature distribution in a laboratory apparatus in which the light module is installed.

[0154] Because the LEDs are assigned to control channels, the intensity of the LEDs can be adjusted individually for each control channel. In addition, only LEDs from one LED group and thus LEDs of the same wavelength are assigned to a control channel, so that the spectrum of the light provided can also be adjusted and optimized for different tasks by setting the identity.

[0155] For example, corresponding light modules can be used for controlled plant growth, wherein, for example, certain wavelengths can be intensified in a targeted manner. For example, the photosynthesis rate can be controlled by means of intensity control for wavelengths in the range of 720 nm to 740 nm. An individual day-night cycle can also be provided, which can be relevant, for example, in animal breeding or plant growth. In principle, a light moduleaccording to the invention can be used to provide light that is optimized for growth, leaf formation, fruit formation and / or seed germination.

[0156] Light modules according to the invention can also be used in animal breeding, in particular in insect breeding, for example Drosophila breeding. Another possibility is to use them to study metabolic processes in cells.

[0157] Furthermore, light modules according to the invention can also be used for surface disinfection by means of UV radiation and in particular for photostability tests, for example according to ICH Q1 B.

[0158] It goes without saying that the choice of LEDs for the light module depends on the intended use.

[0159] Whenever a relative term such as "approximately," "substantially," or "essentially" is used in this description or the claims, such a term should be construed to include the exact term as well. That is to say, e.g., "substantially straight" should be construed to also include "(exactly) straight."

[0160] Whenever steps are mentioned in the above and / or in the appended claims, it should be noted that the order in which the steps are mentioned in this text may be random. That is, the order in which the steps are presented may be random unless otherwise specified or obvious to a person skilled in the art. That is, if in the present document, for example, it is stated that a method comprises steps (A) and (B), this does not necessarily mean that step (A) occurs before step (B), but it is also possible that step (A) (at least in part) is carried out simultaneously with step (B) or that step (B) occurs before step (A). Furthermore, if it is stated that a step (X) precedes another step (Z), this does not mean that there is no step between steps (X) and (Z). That is, step (X) before step (Z) comprises the situation that step (X) is performed directly before step (Z), but also the situation that (X) is performed before oneor more steps (Y1 ), .... followed by step (Z). Corresponding considerations apply when terms such as "after" or "before" are used.

[0161] While a preferred embodiment has been described above with reference to the accompanying drawings, a person skilled in the art will understand that this embodiment has been provided for illustrative purposes only and should in no way be construed as limiting the scope of the present invention which is defined by the claims.

Claims

Claims1 . A light module for a laboratory apparatus, comprising a plurality of LED groups, wherein each LED group comprises a plurality of identical LEDs, wherein the LEDs of different LED groups are different from one another, and a plurality of control channels, wherein each LED is assigned to precisely one of the control channels and each control channel allows for the simultaneous control of the assigned LEDs, wherein the LEDs of at least one LED group are arranged in a illuminant plane of the light module such that their density increases from a center of the illuminant plane to edge regions of the illuminant plane.

2. The light module according to the preceding claim, wherein the LEDs of the at least one LED group are arranged in the illuminant plane at intersection points of a two-dimensional grid, wherein distances between adjacent grid lines running in the same direction decrease in the circumferential direction from a center point of the illuminant plane.

3. The light module according to any of the preceding claims, wherein the LEDs of at least one LED group at a distance of 250 mm provide light in the range of 400 nm to 800 nm with a spatial intensity distribution having a relative standard deviation of at most ±15%, preferably ±8%, from a mean value of the spatial intensity distribution.

4. The light module according to any of the preceding claims, wherein the control of the LEDs assigned to a control channel comprises the control of the intensity of the LEDs.

5. The light module according to any of the preceding claims, wherein LEDs of different LED groups each provide different spectra.

6. The light module according to any of the preceding claims, wherein the light module is configured to be attached to holding devices for shelves of the laboratory apparatus.

7. A laboratory apparatus, comprising an interior, and at least one light module according to any of claims 1 to 6, wherein the light module is configured to illuminate at least a part of the interior.

8. The laboratory apparatus according to the preceding claim, wherein the laboratory apparatus comprises a control unit for the at least one light module and / or at least one driver for the at least one light module.

9. The laboratory apparatus according to any of claims 7 and 8, wherein the laboratory apparatus is an incubator, a heating cabinet, and / or a climate- controlled cabinet.

10. A use of a light module for a laboratory apparatus according to any of claims 1 to 6 in a laboratory apparatus for providing a light adapted with regard to intensity and / or wavelength.

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