Patent Application
20230111037
This application claims priority from Korean Patent Application No. 10-2021-0034897, filed on Oct. 12, 2021 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.
Apparatuses and methods consistent with exemplary embodiments relate to a lighting device and a film cartridge used in the same, and more particularly, to a lighting device which includes a body provided with a substrate, having a plurality of light sources disposed thereon, mounted on the front surface of the body and configured to extend in the length direction, a film cartridge including a film divided into a plurality of radiation areas having different light conversion characteristics, and a pair of roll bars configured to wind both ends of the film thereon, a driving unit combined with one side surface of the body and configured to apply driving force to one end of each of the roll bars to change radiation areas of the film, and a side cover combined with the other side surface of the body and configured to support the other end of each of the roll bars, and a film cartridge used in the lighting device.
In general, technology which uses artificial light for various plant cultivation is currently being widely researched and is being applied as a technology for plant factories.
Further, the agricultural field is at a turning point with the advent of LEDs, and while conventional lighting devices emit light in a wide wavelength band to match human vision, LEDs may adjust the wavelength ratio and intensity of emitted light, and may thus provide the wavelength and amount of light necessary for photosynthesis and easily implement illumination for plant cultivation.
An artificial lighting device using the LEDs may reduce or eliminate the usage of chemical fertilizers, may radiate light effectively to control plant growth, may implement low pesticide cultivation through application of LED technology for pest control, may reduce energy consumption by 80% or more compared to conventional incandescent lamps, and may produce crops for a year regardless of climate change because the LEDs are eco-friendly products without using mercury or heavy metals.
The intensity of light is closely related to the degree of photosynthesis and affects plant growth and the form of plants, and among infrared light, visible light and ultraviolet light, visible light has the greatest influence on growth of crops.
That is, it is known that certain bands of light wavelengths affect plant cultivation.
Conventionally, technologies which use light sources configured to intensively radiate light of a specific wavelength band that promotes photosynthesis, such as light emitting diode (LED) light sources, without lighting devices that irradiate light of all wavelength bands, such as incandescent and fluorescent lamps, fluorescent lamps has been proposed in plant cultivation.
Conventional lighting devices using the LED light sources are disclosed in Korean Patent Registration No. 10-0902071 entitled “Plant forcing culture method and device using LED lamps”, Korean Patent Unexamined Publication No. 10-2004-0010426 entitled “Factory and apparatus for culturing dye plants using LED light source”, Korean Patent Registration No. 10-0879711 entitled “Illumination device for cultivating plants with LEDs” and Korean Patent Unexamined Publication No. 10-2009-0124155 entitled “Light equipment for growing plants and intelligent photonic environment control system using LEDs”.
However, the most conventional lighting devices for cultivating plants using LEDs as light sources mix blue light and red light at a fixed ratio and repeat turning on and off with a pulse period capable of maximizing a photosynthetic rate, and it is difficult to adjust the wavelength band of the light sources in various ways, such as promoting photosynthesis according to a growth stage of a plant species such as seedling culture, differentiation, fruit setting, fruitification, or promoting morphogenesis or flower bud differentiation.
Aspects of one or more exemplary embodiments provide a film cartridge including a film divided into a plurality of radiation areas having different light conversion characteristics, a pair of roll bars configured to wind both ends of the film thereon, and first support brackets combined with both ends of the roll bars to maintain a regular distance between the roll bars, so as to be easily replaced.
Aspects of one or more exemplary embodiments also provide a film cartridge including a film divided into a plurality of radiation areas having different wavelength change characteristics or a film divided into a plurality of radiation areas having different scattering degree characteristics so as to control growth of plants in more detail.
Aspects of one or more exemplary embodiments also provide a lighting device in which a unit configured to connect two or more film modules is provided such that a single motor may be used to transmit driving force thereof to each film module so as to cover a wider radiation area.
According to an aspect of an exemplary embodiment, there is provided a lighting device including a body on which a substrate on which a plurality of light sources are disposed, are mounted on a front surface of the body and configured to extend in a length direction, a film cartridge including a film divided into a plurality of radiation areas having different light conversion characteristics, and a pair of roll bars configured to wind both ends of the film, a driving unit coupled to one side surface of the body and configured to apply driving force to one end of each of the roll bars to change the radiation areas of the film, and a side cover coupled to a remaining side surface of the body to support a remaining end of each of the roll bars.
The film cartridge may further include first support brackets configured such that each of the first support brackets is coupled to one end of each of the roll bars to maintain a constant distance between the roll bars.
Each of the first support brackets may include a plate-type member, and two embedding holes disposed at both ends of the plate-type member to receive one end of each of the roll bars, and a bolt hole configured to fix the film cartridge to the side cover or the driving unit may be formed at a designated position of the plate-type member.
The film cartridge may include two film modules, each film module including the film, the pair of roll bars and the first support bracket, the two film modules may be connected and supported by a second support bracket, and the second support bracket may be combined with a remaining end of each of the roll bars of each of film module, and is configured such that the corresponding first support bracket is not coupled.
Hinge holes may be formed at parts of both ends of the body, and the lighting device may further include a lighting cover combined with the hinge holes formed at the ends of the body so as to be opened and closed.
The driving unit may include a driving motor configured to have a sun gear combined therewith, and a gear arrangement bracket provided with mounted thereon a swing gear interlocked with the sun gear, and a first planet gear and a second planet gear configured such that each of the first planet gear and the second planet gear is separably combined with one end of a corresponding one of the roll bars, and the swing gear may be moved along a hemispherical orbital hole formed in the gear arrangement bracket depending on a direction of rotation of the sun gear, and may be interlocked with the first planet gear or the second planet gear.
A driving shaft may be mounted at a center of each of the first planet gear and the second planet gear, and a slit groove may be formed at one end of the driving shaft so that one end of a corresponding one of the roll bars is inserted into the slit groove.
According to an aspect of another exemplary embodiment, there is provided a film cartridge detachably mounted in the lighting device, the film cartridge including a film divided into a plurality of radiation areas having different light conversion characteristics, a pair of roll bars configured to wind both ends of the film thereon, and first support brackets configured such that each of the first support brackets is combined with one end of each of the roll bars to maintain a constant distance between the roll bars.
Each of the first support brackets may include a plate-type member, and two embedding holes disposed at both ends of the plate-type member to receive one end of each of the roll bars, and a bolt hole configured to fix the film cartridge to the side cover or the driving unit of the lighting device may be formed at a designated position of the plate-type member.
The film cartridge may include two film modules, each film module including the film, the pair of roll bars and the first support bracket, the two film modules may be connected and supported by a second support bracket, and the second support bracket may be combined with a remaining end of each of the roll bars of each of the two film modules, configured such that the corresponding first support bracket is not coupled.
A flat-type proj ection may be formed at one end of each of the roll bars to be inserted into a slit groove formed at one end of a corresponding one of driving shafts mounted on a first planet gear and second planet gear of the driving unit of the lighting device.
The film may be divided into a plurality of radiation areas having different wavelength change characteristics.
The film may be divided into a plurality of radiation areas having different scattering degree characteristics.
The above and other aspects and features will be more clearly understood from the following description of the exemplary embodiments with reference to the accompanying drawings, in which:
Hereinafter reference will be made in detail to the preferred embodiments, examples of which are illustrated in the accompanying drawings. In the following description with reference to the drawings, elements having substantially the same functions are denoted by the same reference numerals even though they are depicted in different drawings, and a detailed description thereof will be omitted when it may make the subject matter of the present invention rather unclear.
As shown in
Further, radiation fins 230 may be formed integrally with the outer surface of the body 200 to radiate heat generated by a plurality of light sources in the body 200 to the outside. The radiation fins 230 may help extend the life of the film cartridge 300 by preventing a film 310 from being deformed by heat applied to the film 310 to some extent.
Further, the film cartridge 300 is configured to be easily separated from the body 200 by opening the lighting cover 210.
As shown in
In the film 310 wound around the film cartridge 300, the surface of the film 310 in contact with light emitted by the light sources may be selected by a driving unit 500 coupled to one side surface of the body 200 to provide driving force to one end of each of the roll bars 312 to change the radiation areas of the film 310.
In addition, the roll bars 312 are supported by a side cover 202 configured to support the other end of each of the roll bars 312 opposite the end of each of the roll bars 312 contacting the driving unit 500, and the side cover 202 is combined the other side surface of the body 200 opposite the side surface of the body 200 with which the driving unit 500 is combined.
The film cartridge 300 further includes first support brackets 320, each of which is combined with one end of each of the roll bars 312 to maintain a constant distance between the roll bars 312.
As shown in
When the film cartridge 300 is formed by connecting the two film modules 302 so that light emitted from a plurality of the light sources installed on the substrate 400 can be transmitted by the film cartridge 300, a lighting device may be economically manufactured with only one driving unit 500, as compared to connection of two lighting devices in series.
For example, the film 310 may use at least one of quantum dots, inorganic fluorescent substances and perovskites having different wavelengths in each of the divided radiation areas A-E, or may use scattering substances having different scattering degrees in each of the divided radiation areas A-E. That is, the film 310 may be divided into a plurality of radiation areas having different wavelength conversion characteristics, or may be divided into a plurality of radiation areas having different scattering degree characteristics.
As shown in
A shaft ring 700 into which one end of each of the roll bars 312 is inserted to more smoothly rotate the corresponding roll bar 312 may be inserted into each of the embedding holes 324, and flat-type grooves corresponding to flat-type proj ections 314 formed by processing ends of the roll bars 312 may be formed in the inner circumferential surfaces of each of the shaft rings 700 so that the flat-type proj ections 314 are inserted into the shaft rings 700.
Further, the bolt hole 322 configured to be fixedly coupled to a screw hole formed in the side cover 202 or a gear arrangement bracket of the driving unit 500 by inserting a bolt into the bolt hole 322 and the screw ole may be formed in the first support bracket 320. However, as a method for coupling the film cartridge 300 to the side cover 202 or the driving unit 500, the bolt coupling is just one example, and, other coupling methods such as protrusion and groove coupling, or any combination of two or more coupling methods may be used without being limited thereto.
As shown in
A driving shaft 316 is mounted at a center of each of the first planet gear 530a and the second planet gear 530b, and a slit groove 316a is formed at one end of the driving shaft 316 so that one end of a corresponding one of the roll bars 312 is inserted into the slit groove 316a.
The flat-type projection 314 is formed at one end of each of the roll bars 312 so as to be inserted into and engaged with the slit groove 316a formed in the driving shaft 315 of the first planet gear 530a or the second planet gear 530b.
However, the slit groove 316a of the driving shaft 316 is not limited thereto, and may be formed in a slit type having one of various polygonal shapes such as a triangle, a rectangle, a star, etc.
Further, the shaft ring 700 serving as a bearing so that one end of each of the roll bars 312 is inserted thereinto to more smoothly rotate the roll bar 312 may be inserted into each of the embedding holes 324 of the first support bracket 320, and a flat-type groove corresponding to the flat-type projection 314 may be formed in the inner circumferential surface of each of the shaft rings 700 so that one end of a corresponding one of the driving shafts 316 formed to have a shape corresponding to the flat-type projection 314 may be inserted into the shaft ring 700.
In addition, the driving motor 510 is combined with a coupling piece 514 and is stably fixed in the state in which the driving motor 510 is provided in a motor case 512.
As shown in
As shown in
Although
The power interlocking unit 1000 is operated in a similar manner as a reel cable-type elastic tape measure which may be automatically wound using elastic restoring force generated when the tape measure is stretched.
The power interlocking unit 1000 includes a spiral spring 1200, a rotor 1100 in which a shaft mount part 1140 is formed at the upper end of the shaft mounting part 1140 and any one of the driving shafts 316 is inserted into the shaft mount part 1140, and an insertion shaft 1130 inserted into the center of the spiral spring 1200, and a stator 130 provided with an inner space configured to receive the spiral spring 1200 and a spring fixing protrusion 1330 formed in one side of the inner space and configured to fix one end of the spiral spring 1200. Further, a guide groove 1120 and a guide protrusion 1310 may be formed in the outer circumferential surface of the rotor 1100 and on the inner circumferential surface of the upper end of the stator 1300 to prevent the rotor 1100 from being released from the stator 1300 and to guide smooth rotation of the rotor 1100.
The stator 1300 is fixedly coupled to a portion inside the motor case 512.
When the film 310 is wound by rotating the roll bar 312 combined with the spur gear 530, restoring force is stored in the spiral spring 1200, and when the film wound on the roll bar 312 combined with the spur gear 530 is unwound, proper tensile force is applied to the film 310 by stored restoring force without any separate external power, and thus, the film 310 may be wound and unwound without sagging.
Referring to
Referring to
As shown in
Referring to
A plurality of hook-type or groove-type hangers 830 configured to hang the module-type lighting system 800 from the ceiling may be provided at the upper ends of the first coupling frame 810 and the second coupling frame 820. The module-type lighting system 800 may be suspended from the ceiling of a greenhouse or cultivation equipment by connecting a wire to the hangers 830.
As is apparent from the above description, one or more exemplary embodiments provide a lighting device including a film cartridge including a film divided into a plurality of radiation areas having different light conversion characteristics, a pair of roll bars configured to wind both ends of the film thereon, first support brackets combined with both ends of the roll bars to maintain a regular distance between the roll bars, thereby enabling the film cartridge to be easily replaced.
Further, the film cartridge includes a film divided into a plurality of radiation areas having different wavelength change characteristics or a film divided into a plurality of radiation areas having different scattering degree characteristics, thereby being capable of controlling growth of plants in more detail.
In addition, a unit configured to connect two or more film modules may be provided such that a single motor may be used to transmit driving force thereof to the respective film modules so as to cover a wider radiation area.
While exemplary embodiments have been described with reference to the accompanying drawings, it is to be understood by those skilled in the art that various modifications in form and details may be made therein without departing from the sprit and scope as defined by the appended claims. Therefore, the description of the exemplary embodiments should be construed in a descriptive sense and not to limit the scope of the claims, and many alternatives, modifications, and variations will be apparent to those skilled in the art.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2021-034897 | Oct 2021 | KR | national |
